Trigger API Reference

Overview

Application Inspection triggers are composed of user-defined code that automatically executes on system events through the ExtraHop trigger API. By writing triggers, you can collect custom metric data about the activities on your network. In addition, triggers can perform operations on protocol messages (such as an HTTP request) before the packet is discarded.

The ExtraHop system monitors, extracts, and records a core set of Layer 7 (L7) metrics for devices on the network, such as response counts, error counts, and processing times. After these metrics are recorded for a given L7 protocol, the packets are discarded, freeing resources for continued processing.

Triggers enable you to:

  • Generate and store custom metrics to the internal datastore of the ExtraHop system. For example, while the ExtraHop system does not collect information about which user agent generated an HTTP request, you can generate and collect that level of detail by writing a trigger and committing the data to the datastore. You can also view custom data that is stored in the datastore by creating custom metrics pages and displaying those metrics through the Metric Explorer and dashboards.
  • Generate and sends records to an Explore appliance for long-term storage and retrieval.
  • Create a user-defined application that collects metrics across multiple types of network traffic to capture information with cross-tier impact. For example, to gain a unified view of all the network traffic associated with a website—from web transactions to DNS requests and responses to database transactions—you can create an application that contains all of these website-related metrics.
  • Generate custom metrics and send the information to syslog consumers such as Splunk, or to third party databases such as MongoDB or Kafka.
  • Initiate a packet capture to record individual flows based on user-specified critera. You can download captured flows and process them through third-party tools. Your ExtraHop system must be licensed for packet capture to access this feature.

The purpose of this guide is to provide reference material when writing the blocks of JavaScript code that run when trigger conditions are met. See Get started with triggers in the ExtraHop Web UI Guide for a comprehensive overview of trigger concepts and procedures.

ExtraHop data types

ExtraHop data types record custom metrics using the Network, Application, and Device, FlowNetwork, and FlowInterface classes.

There are two kinds of metrics in the ExtraHop system:
Top-level metrics
Represent an aggregate of all activity for a particular object type, such as network, application or device.
count
Number (such as HTTP requests).
snapshot
A special type of count metric that, when queried over time, returns the most recent value (such as TCP established connections).
distinct
Estimate the number of unique items observed over time (such as the number of unique ports that received SYN packets, where a high number might indicate port scanning).
dataset
Statistical summary of timing information (such as 5-number summary: min, 25th-percentile, median, 75th-percentile, max).
sampleset
Statistical summary of timing information (such as mean and standard deviation).
max
A special type of count metric that preserves the maximum.
Detail metrics
Represents activity that is broken down by specific keys such as IP addresses or URIs. For each key, there is a value that corresponds to the top-level metric types such as count or snapshot. Detail metrics provide drill-down information for top level metrics.

Examples:

  • To record information about the number of HTTP requests over time, use a top-level count metric.
  • To record information about HTTP processing time over time, use a top-level sampleset (mean and average) or dataset (5-number summary) metric.
  • To record information about the number of times each client IP address accessed the server, use a detail count metric with the IPAddress key and an integer representing the number of accesses as a value.
  • To record information about the length of time it took the server to process each URI, use a detail sampleset or dataset metric with the URI string key and an integer representing processing time as a value.
  • To record the slowest HTTP statements over time without relying on a Session table, use a top-level and a detail max metric.

Global functions

Global functions can be called on any event.

cache (key: String, valueFn: () => Any): Any
Caches the specified parameters in a table to enable efficient lookup and return of large data sets.
key: String
An identifier that indicates the location of the cached value. A key must be unique within a trigger.
valueFn: () => Any
A zero-argument function that returns a non-null value.

In the following example, a list of known user agents in a JBoss trigger is normalized before it is compared with the observed user agent. The trigger converts the list to lowercase and trims excess whitespace, and then caches the entries.

function jbossUserAgents() {
    return [
        // Add your own user agents here, followed by a comma
        "Gecko-like (Edge 14.0; Windows 10; Silverlight or similar)",
        "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_10_5) AppleWebKit/537.36 
         (KHTML, like Gecko) Chrome/51.0.2704.79 Safari/537.36",
        "Mozilla/5.0 (Android)"
    ].map(ua => ua.trim().toLowerCase());
}

// Added further in the trigger within an if-statement designed to filter out most HTTP traffic
var badUserAgents = cache("badUserAgents", jbossUserAgents);

In the following example, the cache method is called with large amounts of data hard-coded into the trigger script:

let hashTable = cache("hashTable", () => ({
    1 : "Assignment Queue Newark",
    2 : "Assignment Queue St Paul",
    3 : "Authorization Queue Newark",
    4 : "Authorization Queue St Paul"// 620 lines omitted
}));
commitRecord (id: String, record: Object): void
Commits a custom record object to the ExtraHop Explore appliance.
id: String
The ID of the record type to be created. The ID cannot begin with a tilde (~).
record: Object
An object containing a list of property and value pairs to be committed to the ExtraHop Explore appliance as a custom record.

The following properties are automatically added to records and are not represented on the objects returned by the built-in record accessors, such as HTTP.record:

  • ex
  • flowID
  • client
  • clientAddr
  • clientPort
  • receiver
  • receiverAddr
  • receiverPort
  • sender
  • senderAddr
  • senderPort
  • server
  • serverAddr
  • serverPort
  • timestamp
  • vlan

For example, to access the flowID property in an HTTP record, you would include HTTP.record.Flow.id in your statement.

Important:To avoid unexpected data in the record or an exception when the method is called, the property names listed above cannot be specified as a property name in custom records.

In addition, a property name in custom records cannot contain any of the following characters:

  • "." - period
  • ":" - colon
  • "[" and "]" - square brackets

In the following example, the two property and value pairs that have been added to the record variable are committed to a custom record by the commitRecord function:

var record = {
   field1: 'myfield1',
   field2: 'myfield2'
};
commitRecord('record_type_id', record);

For built-in protocols that support committing metrics, you can access records that contain default properties. For example, you can access the HTTP.record object on an HTTP response event. A built-in record can be the basis for a custom record. In the following example, the HTTP.record object and two properties are added to the record variable. All of the default properties in the HTTP.record object and the two additional properties are committed to a custom record by the commitRecord function.

var record = {
   HTTP.record,
   field1: 'myfield1',
   field2: 'myfield2'
}; 
commitRecord('record_type_id', record);
debug (message: String): void
Writes to the runtime log if debugging is enabled.
getTimestamp(): Number
Returns the timestamp from the packet that caused the trigger event to run, expressed in milliseconds with microseconds as the fractional segment after the decimal.
log (message: String): void
Writes to the runtime log regardless of whether debugging is enabled.

Multiple calls to debug and log statements in which the message is the same value will display once every 30 seconds.

The limit for runtime log entries is 2048 bytes. To log larger entries, see Remote.Syslog.

md5 (message: String|Buffer): String
Hashes the UTF-8 representation of the specified message Buffer object or string and returns the MD5 sum of the string.
sha1 (message: String|Buffer): String
Hashes the UTF-8 representation of the specified message Buffer object or string and returns the SHA-1 sum of the string.
sha256 (message: String|Buffer): String
Hashes the UTF-8 representation of the specified message Buffer object or string and returns the SHA-256 sum of the string.
sha512 (message: String|Buffer): String
Hashes the UTF-8 representation of the specified message Buffer object or string and returns the SHA-512 sum of the string.
uuid(): String
Returns a random version 4 Universally Unique Identifier (UUID).

General purpose classes

The Trigger API classes in this section provide functionality that is broadly applicable across all events.

Class Description
Application Enables you to create new applications and adds custom metrics at the application level.
Buffer Enables you to access buffer content.
Device Enables you to retrieve device attributes and add custom metrics at the device level.
Discover Enables you to access newly discovered devices and applications.
Flow Flow refers to a conversation between two endpoints over a protocol such as TCP, UDP or ICMP. The Flow class provides access to elements of these conversations, such as endpoint IP addresses and age of the flow. The Flow class also contains a flow store designed to pass objects from request to response on the same flow.
FlowInterface Enables you to retrieve flow interface attributes and add custom metrics at the interface level.
FlowNetwork Enables you to retrieve flow network attributes and add custom metrics at the flow network level.
GeoIP Enables you to retrieve the approximate country-level or city-level location of a specific IP address.
IPAddress Enables you to retrieve IP address attributes.
Network Enables you to add custom metrics at the global level.
Session Enables you to access the session table,which supports coordination across multiple independently executing triggers.
System Enables you to access properties that identify the ExtraHop Discover appliance on which a trigger is running.
Trigger Enables you to access details about a running trigger.
VLAN Enables you to access information about a VLAN on the network.

Application

The Application class enables you collect metrics across multiple types of network traffic to capture information with cross-tier impact. For example, if you want a unified view of all the network traffic associated with a website—from web transactions to DNS requests and responses to database transactions—you can write a trigger to create a custom application that contains all of these related metrics. The Application class also enables you to create custom metrics and commit the metric data to applications. Applications can only be created and defined through triggers.

Instance methods

The methods in this section cannot not be called directly on the Application class. You can only call these methods on specific Application class instances. For example, the following statement is valid:

Application("sampleApp").metricAddCount("responses", 1);

However, the following statement is invalid:

Application.metricAddCount("responses", 1);
commit(id: String): void
Creates an application, commits built-in metrics associated with the event to the application, and adds the application to any built-in or custom records committed during the event.

The application ID must be a string. For built-in application metrics, the metrics are committed only once, even if the commit() method is called multiple times on the same event.

The following statement creates an application named "myApp" and commits built-in metrics to the application:

Application("myApp").commit();

If you plan to commit custom metrics to an application, you can create the application without calling the commit() method. For example, if the application does not already exist, the following statement creates the application and commits the custom metric to the application:

Application("myApp").metricAddCount("requests", 1);

You can call the Application.commit method only on the following events:

Metric types Event
AAA AAA_REQUEST -and- AAA_RESPONSE
AJP AJP_RESPONSE
CIFS CIFS_RESPONSE
DB DB_RESPONSE
DHCP DHCP_REQUEST -and- DHCP_RESPONSE
DNS DNS_REQUEST -and- DNS_RESPONSE
FIX FIX_REQUEST -and- FIX_RESPONSE
FTP FTP_RESPONSE
HTTP HTTP_RESPONSE
IBMMQ IBMMQ_REQUEST -and- IBMMQ_RESPONSE
ICA ICA_TICK -and- ICA_CLOSE
Kerberos KERBEROS_REQUEST -and- KERBEROS_RESPONSE
LDAP LDAP_REQUEST -and- LDAP_RESPONSE
Memcache MEMCACHE_REQUEST -and- MEMCACHE_RESPONSE
MongoDB MONGODB_REQUEST -and- MONGODB_RESPONSE
NAS CIFS_RESPONSE -and/or- NFS_RESPONSE
NetFlow NETFLOW_RECORD

Note that the commit will not occur if enterprise IDs are present in the NetFlow record.

NFS NFS_RESPONSE
Redis REDIS_REQUEST -and- REDIS_RESPONSE
RTP RTP_TICK
RTCP RTCP_MESSAGE
SIP SIP_REQUEST -and- SIP_RESPONSE
SFlow SFLOW_RECORD
SMTP SMTP_RESPONSE
SSH SSH_CLOSE -and- SSH_TICK
SSL SSL_RECORD -and- SSL_CLOSE
WebSocket WEBSOCKET_OPEN, WEBSOCKET_CLOSE, and WEBSOCKET_MESSAGE
metricAddCount (metric_name: String, count: Number, [options: Object]):void
Creates a custom top-level count metric. Commits the metric data to the specified application.
metric_name: String
The name of the top-level count metric.
count: Number
The increment value. Must be a non-zero, positive signed 64-bit integer. A NaN value is silently discarded.
options: Object
An optional object that can contain the following property:
highPrecision: Boolean
A flag that enables one-second granularity for the custom metric when set to true.
metricAddDetailCount (metric_name: String, key: String | IPAddress, count: Number, [options: Object]):void
Creates a custom detail count metric by which you can drill down. Commits the metric data to the specified application.
metric_name: String
The name of the detail count metric.
key: String | IPAddress
The key specified for the detail metric. A null value is silently discarded.
count: Number
The increment value. Must be a non-zero, positive signed 64-bit integer. A NaN value is silently discarded.
options: Object
An optional object that can contain the following property:
highPrecision: Boolean
A flag that enables one-second granularity for the custom metric when set to true.
metricAddDataset (metric_name: String, val: Number, [options: Object]):void
Creates a custom top-level dataset metric. Commits the metric data to the specified application.
metric_name: String
The name of the top-level dataset metric.
val: Number
The observed value, such as a processing time. Must be a non-zero, positive signed 64-bit integer. A NaN value is silently discarded.
options: Object
An optional object that can contain the following properties:
freq: Number
An option that enables you to simultaneously record multiple occurrences of particular values in the dataset when set to the number of occurrences specified by the val parameter. If no value is specified, the default value is 1.
highPrecision: Boolean
A flag that enables one-second granularity for the custom metric when set to true.
metricAddDetailDataset (metric_name: String, key: String | IPAddress, val: Number, [options: Object]):void
Creates a customdetail  dataset metric by which you can drill down. Commits the metric data to the specified application.
metric_name: String
The name of the detail count metric.
key: String | IPAddress
The key specified for the detail metric. A null value is silently discarded.
val: Number
The observed value, such as a processing time. Must be a non-zero, positive signed 64-bit integer. A NaN value is silently discarded.
options: Object
An optional object that can contain the following properties:
freq: Number
An option that enables you to simultaneously record multiple occurrences of particular values in the dataset when set to the number of occurrences specified by the val parameter. If no value is specified, the default value is 1.
highPrecision: Boolean
A flag that enables one-second granularity for the custom metric when set to true.
metricAddDistinct (metric_name: String, item: Number | String | IPAddress:void
Creates a custom top-level distinct count metric. Commits the metric data to the specified application.
metric_name: String
The name of the top-level distinct count metric.
item: Number | String | IPAddress
The value to be placed into the HyperLogLog set specified by the metric_name parameter. The value is converted to a string before it is placed in the HyperLogLog set.
metricAddDetailDistinct (metric_name: String, key: String | IPAddress, item: Number | String | IPAddress:void
Creates a custom detail distinct count metric by which you can drill down. Commits the metric data to the specified application.
metric_name: String
The name of the detail distinct count metric.
key: String | IPAddress
The key specified for the detail metric. A null value is silently discarded.
item: Number | String | IPAddress
The value to be placed into the HyperLogLog set specified by the metric_name parameter. The value is converted to a string before it is placed in the HyperLogLog set.
metricAddMax (metric_name: String, val: Number, [options: Object]):void
Creates a custom top-level maximum metric. Commits the metric data to the specified application.
metric_name: String
The name of the top-level maximum metric.
val: Number
The observed value, such as a processing time. Must be a non-zero, positive signed 64-bit integer. A NaN value is silently discarded.
options: Object
An optional object that can contain the following properties:
highPrecision: Boolean
A flag that enables one-second granularity for the custom metric when set to true.
metricAddDetailMax (metric_name: String, key: String | IPAddress, val: Number, [options: Object]):void
Creates a custom detail maximum metric by which you can drill down. Commits the metric data to the specified application.
metric_name: String
The name of the detail maximum metric.
key: String | IPAddress
The key specified for the detail metric. A null value is silently discarded.
val: Number
The observed value, such as a processing time. Must be a non-zero, positive signed 64-bit integer. A NaN value is silently discarded.
options: Object
An optional object that can contain the following properties:
highPrecision: Boolean
A flag that enables one-second granularity for the custom metric when set to true.
metricAddSampleset (metric_name: String, val: Number, [options: Object]):void
Creates a custom top-level sampleset metric. Commits the metric data to the specified application.
metric_name: String
The name of the top-level sampleset metric.
val: Number
The observed value, such as a processing time. Must be a non-zero, positive signed 64-bit integer. A NaN value is silently discarded.
options: Object
An optional object that can contain the following properties:
highPrecision: Boolean
A flag that enables one-second granularity for the custom metric when set to true.
metricAddDetailSampleset (metric_name: String, key: String | IPAddress, val: Number, [options: Object]):void
Creates a custom detail sampleset metric by which you can drill down. Commits the metric data to the specified application.
metric_name: String
The name of the detail sampleset metric.
key: String | IPAddress
The key specified for the detail metric. A null value is silently discarded.
val: Number
The observed value, such as a processing time. Must be a non-zero, positive signed 64-bit integer. A NaN value is silently discarded.
options: Object
An optional object that can contain the following properties:
highPrecision: Boolean
A flag that enables one-second granularity for the custom metric when set to true.
metricAddSnap (metric_name: String, count: Number, [options: Object]):void
Creates a custom top-level snapshot metric. Commits the metric data to the specified application.
metric_name: String
The name of the top-level snapshot metric.
count: Number
The observed value, such as current established connections. Must be a non-zero, positive signed 64-bit integer. A NaN value is silently discarded.
options: Object
An optional object that can contain the following properties:
highPrecision: Boolean
A flag that enables one-second granularity for the custom metric when set to true.
metricAddDetailSnap (metric_name: String, key: String | IPAddress, count: Number, [options: Object]):void
Creates a custom detail snapshot metric by which you can drill down. Commits the metric data to the specified application.
metric_name: String
The name of the detail sampleset metric.
key: String | IPAddress
The key specified for the detail metric. A null value is silently discarded.
count: Number
The observed value, such as current established connections. Must be a non-zero, positive signed 64-bit integer. A NaN value is silently discarded.
options: Object
An optional object that can contain the following properties:
highPrecision: Boolean
A flag that enables one-second granularity for the custom metric when set to true.

Instance properties

id: String
The unique ID of the application, as shown in the ExtraHop Web UI on the page for that application.

Buffer

The Buffer class provides access to binary data.

A buffer is an object with the characteristics of an array. Each element in the array is a number between 0 and 255, representing one byte. Each buffer object has a length property (the number of items in an array) and a square bracket operator.

Encrypted payload is not decrypted for TCP and UDP payload analysis.

UDP_PAYLOAD requires a matching string but TCP_PAYLOAD does not. If you do not specify a matching string for TCP_PAYLOAD, the trigger runs one time after the first N bytes of payload.

Instance methods

decode(type: String): String
Interprets the contents of the buffer and returns a string with one of the following options:
  • utf-8
  • utf-16
  • ucs2
  • hex
equals(): Boolean
Performs an equality test between buffer objects. The compared buffers are considered equal if the length and content are exactly the same.
slice(start: Number, [end: Number]): Buffer
Returns the specified bytes in a buffer as a new buffer. Bytes are selected starting at the given start argument and ending at (but not including) the end argument.
start: Number
Integer that specifies where to start the selection. Use negative numbers to select from the end of a buffer. This is zero-based.
end: Number
Optional integer that specifies where to end the selection. If omitted, all elements from the start position and to the end of the buffer will be selected. Use negative numbers to select from the end of a buffer. This is zero-based.
toString(): String
Converts the buffer to a string.
unpack(format: String, [offset: Number]): Array
Processes binary or fixed-width data from any buffer object, such as one returned by HTTP.payload, Flow.client.payload, or Flow.sender.payload, according to the given format string and, optionally, at the specified offset.

Returns a JavaScript array that contains one or more unpacked fields and contains the absolute payload byte position +1 of the last byte in the unpacked object. The bytes value can be specified as the offset in further calls to unpack a buffer.

Note:
  • Buffer.unpack uses big-endian, standard alignment, by default.
  • The format does not have to consume the entire buffer.
  • Null bytes are not included in unpacked strings. For example: buf.unpack('4s')[0] - > 'example'.
  • The z format character represents variable-length, null-terminated strings. If the last field is z, the string is produced whether or not the null character is present.
  • An exception is throw when all of the fields cannot be unpacked because the buffer does not contain enough data.

The table below displays supported buffer string formats:

Format C type JavaScript type Standard size
x pad type no value  
A struct in6_addr IPAddress 16
a struct in_addr IPAddress 4
b signed char string of length 1 1
B unsigned char number 1
? _Bool boolean 1
h short number 2
H unsigned short number 2
i int number 4
I unsigned int number 4
l long number 4
L unsigned long number 4
q long long number 8
Q unsigned long long number 8
f number number 4
d double number 4
s char[] string  
z char[] string  

Instance Properties

length: Number
The number of bytes in the buffer.

Device

The Device class enables you to retrieve device attributes and add custom metrics at the device level.

Instance methods

The methods described in this section are present only on instances of the Device class. The majority of the methods enable you to create device-level custom metrics, as shown in the following example:

Flow.server.device.metricAddCount("slow_rsp", 1);
Note:A device might sometimes act as a client and sometimes as a server on a flow.
  • Call a method as Device.metricAdd* to collect data for both device roles.
  • Call a method as Flow.client.device.metricAdd* to collect data only for the client role, regardless of whether the trigger is assigned to the client or the server.
  • Call a method as Flow.server.device.metricAdd* to collect data only for the server role, regardless of whether the trigger is assigned to the client or the server.
Device(id: String)

Constructor for the Device object that accepts one parameter, which is a unique 16-character string ID.

If supplied with an ID from an existing Device object, the constructor creates a copy of that object with all of the object properties, as shown in the followng example:

myDevice = new Device(Flow.server.device.id);
debug("myDevice MAC: " + myDevice.hwaddr);

Metrics committed to a Device object through a metricAdd* function are persisted to the datastore

equals(): Boolean
Performs an equality test between Device objects.
metricAddCount (metric_name: String, count: Number, [options: Object]):void
Creates a custom top-level count metric. Commits the metric data to the specified application.
metric_name: String
The name of the top-level count metric.
count: Number
The increment value. Must be a non-zero, positive signed 64-bit integer. A NaN value is silently discarded.
options: Object
An optional object that can contain the following property:
highPrecision: Boolean
A flag that enables one-second granularity for the custom metric when set to true.
metricAddDetailCount (metric_name: String, key: String | IPAddress, count: Number, [options: Object]):void
Creates a custom detail count metric by which you can drill down. Commits the metric data to the specified application.
metric_name: String
The name of the detail count metric.
key: String | IPAddress
The key specified for the detail metric. A null value is silently discarded.
count: Number
The increment value. Must be a non-zero, positive signed 64-bit integer. A NaN value is silently discarded.
options: Object
An optional object that can contain the following property:
highPrecision: Boolean
A flag that enables one-second granularity for the custom metric when set to true.
metricAddDataset (metric_name: String, val: Number, [options: Object]):void
Creates a custom top-level dataset metric. Commits the metric data to the specified application.
metric_name: String
The name of the top-level dataset metric.
val: Number
The observed value, such as a processing time. Must be a non-zero, positive signed 64-bit integer. A NaN value is silently discarded.
options: Object
An optional object that can contain the following properties:
freq: Number
An option that enables you to simultaneously record multiple occurrences of particular values in the dataset when set to the number of occurrences specified by the val parameter. If no value is specified, the default value is 1.
highPrecision: Boolean
A flag that enables one-second granularity for the custom metric when set to true.
metricAddDetailDataset (metric_name: String, key: String | IPAddress, val: Number, [options: Object]):void
Creates a custom detail dataset metric by which you can drill down. Commits the metric data to the specified application.
metric_name: String
The name of the detail count metric.
key: String | IPAddress
The key specified for the detail metric. A null value is silently discarded.
val: Number
The observed value, such as a processing time. Must be a non-zero, positive signed 64-bit integer. A NaN value is silently discarded.
options: Object
An optional object that can contain the following properties:
freq: Number
An option that enables you to simultaneously record multiple occurrences of particular values in the dataset when set to the number of occurrences specified by the val parameter. If no value is specified, the default value is 1.
highPrecision: Boolean
A flag that enables one-second granularity for the custom metric when set to true.
metricAddDistinct (metric_name: String, item: Number | String | IPAddress:void
Creates a custom top-level distinct count metric. Commits the metric data to the specified application.
metric_name: String
The name of the top-level distinct count metric.
item: Number | String | IPAddress
The value to be placed into the HyperLogLog set specified by the metric_name parameter. The value is converted to a string before it is placed in the HyperLogLog set.
metricAddDetailDistinct (metric_name: String, key: String | IPAddress, item: Number | String | IPAddress:void
Creates a custom detail distinct count metric by which you can drill down. Commits the metric data to the specified application.
metric_name: String
The name of the detail distinct count metric.
key: String | IPAddress
The key specified for the detail metric. A null value is silently discarded.
item: Number | String | IPAddress
The value to be placed into the HyperLogLog set specified by the metric_name parameter. The value is converted to a string before it is placed in the HyperLogLog set.
metricAddMax (metric_name: String, val: Number, [options: Object]):void
Creates a custom top-level maximum metric. Commits the metric data to the specified application.
metric_name: String
The name of the top-level maximum metric.
val: Number
The observed value, such as a processing time. Must be a non-zero, positive signed 64-bit integer. A NaN value is silently discarded.
options: Object
An optional object that can contain the following properties:
highPrecision: Boolean
A flag that enables one-second granularity for the custom metric when set to true.
metricAddDetailMax (metric_name: String, key: String | IPAddress, val: Number, [options: Object]):void
Creates a custom detail maximum metric by which you can drill down. Commits the metric data to the specified application.
metric_name: String
The name of the detail maximum metric.
key: String | IPAddress
The key specified for the detail metric. A null value is silently discarded.
val: Number
The observed value, such as a processing time. Must be a non-zero, positive signed 64-bit integer. A NaN value is silently discarded.
options: Object
An optional object that can contain the following properties:
highPrecision: Boolean
A flag that enables one-second granularity for the custom metric when set to true.
metricAddSampleset (metric_name: String, val: Number, [options: Object]):void
Creates a custom top-level sampleset metric. Commits the metric data to the specified application.
metric_name: String
The name of the top-level sampleset metric.
val: Number
The observed value, such as a processing time. Must be a non-zero, positive signed 64-bit integer. A NaN value is silently discarded.
options: Object
An optional object that can contain the following properties:
highPrecision: Boolean
A flag that enables one-second granularity for the custom metric when set to true.
metricAddDetailSampleset (metric_name: String, key: String | IPAddress, val: Number, [options: Object]):void
Creates a custom detail sampleset metric by which you can drill down. Commits the metric data to the specified application.
metric_name: String
The name of the detail sampleset metric.
key: String | IPAddress
The key specified for the detail metric. A null value is silently discarded.
val: Number
The observed value, such as a processing time. Must be a non-zero, positive signed 64-bit integer. A NaN value is silently discarded.
options: Object
An optional object that can contain the following properties:
highPrecision: Boolean
A flag that enables one-second granularity for the custom metric when set to true.
metricAddSnap (metric_name: String, count: Number, [options: Object]):void
Creates a custom top-level snapshot metric. Commits the metric data to the specified application.
metric_name: String
The name of the top-level snapshot metric.
count: Number
The observed value, such as current established connections. Must be a non-zero, positive signed 64-bit integer. A NaN value is silently discarded.
options: Object
An optional object that can contain the following properties:
highPrecision: Boolean
A flag that enables one-second granularity for the custom metric when set to true.
metricAddDetailSnap (metric_name: String, key: String | IPAddress, count: Number, [options: Object]):void
Creates a custom detail snapshot metric by which you can drill down. Commits the metric data to the specified application.
metric_name: String
The name of the detail sampleset metric.
key: String | IPAddress
The key specified for the detail metric. A null value is silently discarded.
count: Number
The observed value, such as current established connections. Must be a non-zero, positive signed 64-bit integer. A NaN value is silently discarded.
options: Object
An optional object that can contain the following properties:
highPrecision: Boolean
A flag that enables one-second granularity for the custom metric when set to true.

Instance properties

The following properties enable you to retrieve device attributes and are present only on instances of the Device class.

cdpName: String
The CDP name associated with the device, if present.
dhcpName: String
The DHCP name associated with the device, if present.
discoverTime: Number
The last time the capture process discovered the device (not the original discovery time), expressed in milliseconds since the epoch (January 1, 1970). Previously discovered devices can be rediscovered by the capture process if they become idle and later become active again, or if the capture process is restarted.

To direct a trigger to run only on the initial discovery of a device, see the NEW_DEVICE event discussed in the Discover class.

dnsNames: Array
An array of strings listing the DNS names associated with the device, if present.
hasTrigger: Boolean
The value is true if a trigger assigned to the Device object is currently running.

If the trigger is running on an event associated with a Flow object, the hasTrigger property value is true on at least one of the Device objects in the flow.

The hasTrigger property is useful to distinguish device roles. For example, if a trigger is assigned to a group of proxy servers, you can easily determine whether a device is acting as the client or the server, rather than checking for IP addresses or device IDs, such as in the following example:

//Event: HTTP_REQUEST
if (Flow.server.device.hasTrigger) {
    // Incoming request
} else {
    // Outgoing request
}
hwaddr: String
The MAC address of the device, if present.
id: String
The 16-character unique ID of the device, as shown in the ExtraHop Web UI on the page for that device.
ipaddrs: Array
An array of IPAddress objects representing the device's known IP addresses. For L3 devices, the array always contains one IPAddress.
isGateway: Boolean
The value is true if the device is a gateway.
isL3: Boolean
The value is true if the device is an L3 device.
netbiosName: String
The NetBIOS name associated with the device, if present.
vlanId: Number
The VLAN ID for the device.

Discover

The Discover class enables you to retrieve information about newly discovered devices and applications.

Events

NEW_APPLICATION
Runs when an application is first discovered. This event consumes datastore resources.
NEW_DEVICE
Runs when activity is first observed on a device. This event consumes capture resources.

Properties

application: Application
A newly discovered application.

Applies only to NEW_APPLICATION events.

device: Device
A newly discovered device.

Applies only to NEW_DEVICE events.

Flow

Flow refers to a conversation between two endpoints over a protocol such as TCP, UDP or ICMP. The Flow class provides access to elements of these conversations, such as endpoint IP addresses and age of the flow. The Flow class also contains a flow store designed to pass objects from request to response on the same flow.

Note:You can apply the Flow class on most L7 protocol events, but it is not supported on session or datastore events.

Events

If a flow is associated with an ExtraHop-monitored L7 protocol, events that correlate to the protocol will run in addition to flow events. For example, a flow associated with HTTP will also run the HTTP_REQUEST and HTTP_RESPONSE events.

FLOW_CLASSIFY
Runs whenever the ExtraHop system initially classifies a flow as being associated with a specific protocol.
Note:For TCP flows, the FLOW_CLASSIFY event runs after the TCP_OPEN event.

Through a combination of L7 payload analysis, observation of TCP handshakes, and port number-based heuristics, the FLOW_CLASSIFY event identifies the L7 protocol and the device roles for the endpoints in a flow such as client/server or sender/receiver.

The nature of a flow can change over its lifetime, for example, tunneling over HTTP or switching from SMTP to SMTP-SSL. In these cases, FLOW_CLASSIFY runs again after the protocol change.

The FLOW_CLASSIFY event is useful for initiating an action on a flow based on the earliest knowledge of flow information such as the L7 protocol, client/server IP addresses, or sender/receiver ports.

Common actions initiated upon FLOW_CLASSIFY include starting a packet capture through the captureStart() method or associating the flow with an application container through the addApplication() method.

Additional options are available when you create a trigger that runs on this event. By default, FLOW_CLASSIFY does not run upon flow expiration; however, you can configure a trigger to do so in order to accumulate metrics for flows that were not classified before expiring. See Advanced trigger options for more information.

FLOW_DETACH
Runs when the parser has encountered an unexpected error or has run out of memory and stops following the flow.

FLOW_DETACH can be used to detect malicious content sent by clients and servers. The following is an example of how a trigger can detect bad DNS responses upon FLOW_DETACH events:

if (event == "FLOW_DETACH" && Flow.l7proto== "DNS") {
    Flow.addApplication("Malformed DNS");
}
FLOW_RECORD
Enables you to record information about a flow at timed intervals. Once FLOW_CLASSIFY has run, the FLOW_RECORD event will run every N seconds and whenever a flow closes. The default value for N, known as the publish interval, is 30 minutes; the minimum value is 60 seconds. You can set the publish interval from the ExtraHop Admin UI through the Automatic Flow Record Settings.
FLOW_TICK
Enables you to record information about a flow per amount of data or per turn. The FLOW_TICK event will run on every FLOW_TURN or every 128 packets, whichever occurs first. Also, L2 data is reset on every FLOW_TICK event which enables you to add data together at each tick. If counting throughput, collect data from FLOW_TICK events which provide more complete metrics than FLOW_TURN.

FLOW_TICK provides a means to periodically check for certain conditions on the flow, such as zero windows and Nagle delays, and then take an action, such as initiating a packet capture or sending a syslog message.

The following is an example of FLOW_TICK:

log("RTT " + Flow.roundTripTime);
Remote.Syslog.info(
  " eh_event=FLOW_TICK" +
  " ClientIP="+Flow.client.ipaddr+
  " ServerIP="+Flow.server.ipaddr+
  " ServerPort="+Flow.server.port+
  " ServerName="+Flow.server.device.dnsNames[0]+
  " RTT="+Flow.roundTripTime);
FLOW_TURN
Runs on every TCP or UDP turn. A turn represents one full cycle of a client transferring request data followed by a server transferring a response.

FLOW_TURN also exposes a Turn object.

Endpoints

Flow refers to a conversation between two endpoints over a protocol; an endpoint can be one of the following components:

  • client
  • server
  • sender
  • receiver

The methods and properties described in this section are called or accessed for a specified endpoint on the flow. For example, to access the device property from an HTTP client, the syntax is Flow.client.device.

The endpoint that you specify depends on the events associated with the trigger. For example, the ACTIVEMQ_MESSAGE event only supports sender and receiver endpoints. The following table displays a list of events that can be associated with a flow and the endpoints supported for each event:

Event Client / Server Sender / Receiver
AAA_REQUEST yes yes
AAA_RESPONSE yes yes
AJP_REQUEST yes yes
AJP_RESPONSE yes yes
ACTIVEMQ_MESSAGE no yes
CIFS_REQUEST yes yes
CIFS_RESPONSE yes yes
DB_REQUEST yes yes
DB_RESPONSE yes yes
DHCP_REQUEST yes yes
DHCP_RESPONSE yes yes
DNS_REQUEST yes yes
DNS_RESPONSE yes yes
HTTP_REQUEST yes yes
HTTP_RESPONSE yes yes
IBMMQ_REQUEST yes yes
IBMMQ_RESPONSE yes yes
ICA_AUTH yes no
ICA_CLOSE yes no
ICA_OPEN yes no
ICA_TICK yes no
FIX_REQUEST yes yes
FIX_RESPONSE yes yes
FLOW_CLASSIFY yes no
FLOW_DETACH yes no
FLOW_TICK yes no
FLOW_TURN yes no
FTP_REQUEST yes yes
FTP_RESPONSE yes yes
HL7_REQUEST yes yes
HL7_RESPONSE yes yes
ICMP_MESSAGE no yes
KERBEROS_REQUEST yes yes
KERBEROS_RESPONSE yes yes
LDAP_REQUEST yes yes
LDAP_RESPONSE yes yes
MEMCACHE_REQUEST yes yes
MEMCACHE_RESPONSE yes yes
MONGODB_REQUEST yes yes
MONGODB_RESPONSE yes yes
MSMQ_MESSAGE no yes
NFS_REQUEST yes yes
NFS_RESPONSE yes yes
RTCP_MESSAGE no yes
RTP_CLOSE no yes
RTP_OPEN no yes
RTP_TICK no yes
SIP_REQUEST yes yes
SIP_RESPONSE yes yes
SMPP_REQUEST yes yes
SMPP_RESPONSE yes yes
SMTP_REQUEST yes yes
SMTP_RESPONSE yes yes
SSL_ALERT yes yes
SSL_CLOSE yes no
SSL_HEARTBEAT yes yes
SSL_OPEN yes no
SSL_PAYLOAD yes yes
SSL_RECORD yes yes
SSL_RENEGOTIATE yes no
TCP_CLOSE yes no
TCP_OPEN yes no
TCP_PAYLOAD yes yes
UDP_PAYLOAD yes yes
TELNET_MESSAGE yes yes
WEBSOCKET_OPEN yes no
WEBSOCKET_CLOSE yes no
WEBSOCKET_MESSAGE yes yes
Endpoint methods
commitRecord(): void
Commits a record object to the ExtraHop Explore appliance on a FLOW_RECORD event. Record commits are not supported on FLOW_CLASSIFY, FLOW_DETACH, FLOW_TICK, or FLOW_TURN events.

On a flow, traffic moves in each direction between two endpoints. The commitRecord() method only records flow details in one direction, such as from the client to the server. To record details about the entire flow you must call commitRecord() twice, once for each direction, and specify the endpoint in the syntax—for example, Flow.client.commitRecord() and Flow.server.commitRecord().

For built-in records, each unique record is committed only once, even if the commitRecord() method is called multiple times for the same unique record.

To view the default properties committed to the record object, see the record property below.

Endpoint properties
bytes: Number
The number of L4 payload bytes transmitted by a device. Specify the device role in the syntax—for example, Flow.client.bytes or Flow.receiver.bytes.

Access only on FLOW_TICK, FLOW_TURN, or FLOW_RECORD events or an error will occur.

customDevices: Array
An array of custom devices in the flow. Specify the device role in the syntax—for example, Flow.client.customDevices or Flow.receiver.customDevices.
device: Device
The Device object associated with a device. Specify the device role in the syntax. For example, to access the MAC address of the client device, specify Flow.client.device.hwaddr.
equals: Boolean
Performs an equality test between Device objects.
dscp: Number
The number representing the last differentiated services code point (DSCP) value of the flow packet.

Specify the device role in the syntax—for example, Flow.client.dscp or Flow.server.dscp.

dscpBytes: Array
An array that contains the number of L2 bytes for a specific Differentiated Services Code Point (DSCP) value transmitted by a device in the flow. Specify the device role in the syntax—for example, Flow.client.dscpBytes or Flow.server.dscpBytes.

The value is zero for each entry that has no bytes of the specific DSCP since the last FLOW_TICK event.

Access only on FLOW_TICK or FLOW_TURN events or an error will occur.

dscpName: String
The name associated with the DSCP value transmitted by a device in the flow. The following table displays well-known DSCP names:
Number Name
8 CS1
10 AF11
12 AF12
14 AF13
16 CS2
18 AF21
20 AF22
22 AF23
24 CS3
26 AF31
28 AF32
30 AF33
32 CS4
34 AF41
36 AF42
38 AF43
40 CS5
44 VA
46 EF
48 CS6
56 CS7

Specify the device role in the syntax—for example, Flow.client.dscpName or Flow.receiver.dscpName.

dscpPkts: Array
An array that contains the number of L2 packets for a given Differentiated Services Code Point (DSCP) value transmitted by a device in the flow. Specify the device role in the syntax—for example, Flow.client.dscpPkts or Flow.server.dscpPkts.

The value is zero for each entry that has no packets of the specific DSCP since the last FLOW_TICK event.

Applies only to FLOW_TICK or FLOW_TURN events.

fragPkts: Number
The number of packets resulting from IP fragmentation transmitted by a client or server device in the flow. Specify the device role in the syntax—for example, Flow.client.fragPkts or Flow.server.fragPkts.

Access only on FLOW_TICK or FLOW_TURN events or an error will occur.

ipaddr: IPAddress
The IPAddress object associated with a device in the flow. Specify the device role in the syntax—for example, Flow.client.ipaddr or Flow.receiver.ipaddr.
equals: Boolean
Performs an equality test between IPAddress objects.
isAborted: Boolean
The value is true if a TCP flow has been aborted through a TCP reset (RST). The flow can be aborted by a device. If applicable, specify the device role in the syntax—for example, Flow.client.isAborted or Flow.receiver.isAborted.

This condition may be detected in the TCP_CLOSE event and in any impacted L7 events (for example, HTTP_REQUEST or DB_RESPONSE).

Note:
  • An L4 abort occurs when a TCP connection is closed with a RST instead of a graceful shutdown.
  • An L7 response abort occurs when a connection closes while in the middle of a response. This can be due to a RST, a graceful FIN shutdown, or an expiration.
  • An L7 request abort occurs when a connection closes in the middle of a request. This can also be due to a RST, a graceful FIN shutdown, or an expiration.
isShutdown: Boolean
The value is true if the device initiated the shutdown of the TCP connection. Specify the device role in the syntax—for example, Flow.client.isShutdown or Flow.receiver.isShutdown.
l2Bytes: Number
The number of L2 bytes, including the ethernet headers, transmitted by a device in the flow. Specify the device role in the syntax—for example, Flow.client.l2Bytes or Flow.server.l2Bytes.

Access only on FLOW_TICK or FLOW_TURN events or an error will occur.

nagleDelay: Number
The number of Nagle delays associated with a device in the flow. Specify the device role in the syntax—for example, Flow.client.nagleDelay or Flow.server.nagleDelay.

Access only on FLOW_TICK or FLOW_TURN events or an error will occur.

overlapFragPkts: Number
The number of non-identical IP fragment packets with overlapping data transmitted by a device in the flow. Specify the device role in the syntax—for example, Flow.client.overlapFragPkts or Flow.server.overlapFragPkts.

Access only on FLOW_TICK or FLOW_TURN events or an error will occur.

overlapSegments: Number
The number of non-identical TCP segments, transmitted by a device in the flow, where two or more TCP segments contain data for the same part of the flow. Specify the device role in the syntax—for example, Flow.client.overlapSegments or Flow.server.overlapSegments.

Access only on FLOW_TICK or FLOW_TURN events or an error will occur.

payload: Buffer
The payload Buffer associated with a device in the flow. Specify the device role in the syntax—for example, Flow.client.payload or Flow.receiver.payload.

Access only on TCP_PAYLOAD, UDP_PAYLOAD, or SSL_PAYLOAD events or an error will occur.

pkts: Number
The number of packets transmitted by a device in the flow. Specify the device role in the syntax—for example, Flow.client.pkts or Flow.server.pkts.

Access only on FLOW_TICK, FLOW_TURN, or FLOW_RECORD events or an error will occur.

port: Number
The port number associated with a device in the flow. Specify the device role in the syntax—for example, Flow.client.port or Flow.receiver.port.
rcvWndThrottle: Number
The number of receive window throttles sent from a device in the flow. Specify the device role in the syntax—for example, Flow.client.rcvWndThrottle or Flow.server.rcvWndThrottle.

Access only on FLOW_TICK or FLOW_TURN events or an error will occur.

record: Object
The record object committed to the ExtraHop Explore appliance through a call to Flow.commitRecord() on a FLOW_RECORD event. The record object represents data from a single direction on the flow.

The record object contains the following default properties:

  • age
  • bytes (L3)
  • dscpName
  • first
  • last
  • pkts
  • proto
  • senderAddr
  • senderPort
  • receiverAddr
  • receiverPort
  • tcpFlags

Specify the device role in the syntax—for example, Flow.client.record or Flow.server.record.

Access the record object only on FLOW_RECORD events or an error will occur.

rto: Number
The number of retransmission timeouts (RTOs) associated with a device in the flow. Specify the device role in the syntax—for example, Flow.client.rto or Flow.server.rto.

Access only on FLOW_TICK or FLOW_TURN events or an error will occur.

zeroWnd: Number
The number of zero windows sent from a device in the flow. Specify the device role in the syntax—for example, Flow.client.zeroWnd or Flow.server.zeroWnd.

Access only on FLOW_TICK or FLOW_TURN events or an error will occur.

Methods

addApplication(name: String, [turnTiming: Boolean]): void
Creates an application with the specified name and collects L2-L4 metrics from the flow. The application can be viewed from the Web UI and the metrics are displayed on an L4 page in the application. A flow can be associated with one or more applications at a given instant; the L2-L4 metrics collected by each application will be the same.

Calling Flow.addApplication(name) on a FLOW_CLASSIFY event is common on unsupported protocols. For flows on supported protocols with L7 trigger events, it is recommended to call the Application(name).commit() method, which collects a larger set of protocol metrics.

The turnTiming flag is set to false by default. If set to true, the ExtraHop system collects additional turn timing metrics for the flow. If this flag is omitted, no turn timing metrics are recorded for the application on the associated flow. Turn timing analysis analyzes L4 behavior in order to infer L7 processing times when the monitored protocol follows a client-request, server-response pattern and in which the client sends the first message. "Banner" protocols (where the server sends the first message) and protocols where data flows in both directions concurrently are not recommended for turn timing analysis.

captureStart(name: String, [options: Object]): String
Initiates a Precision Packet Capture (PPCAP) for the flow and returns a unique identifier of the packet capture in the format of a decimal number as a string. Returns null if the packet capture fails to start.
name: String
The name of the packet capture file.
  • The maximum length is 256 characters
  • A separate capture is created for each flow.
  • Capture files with the same name are differentiated by timestamps.
options: Object
The options contained in the capture object. Omit any of the options to indicate unlimited size for that option. All options apply to the entire flow except the "lookback" options which apply only to the part of the flow before the trigger event that started the packet capture.
maxBytes: Number
The total maximum number of bytes.
maxBytesLookback: Number
The total maximum number of bytes from the lookback buffer. The lookback buffer refers to packets captured before the call to Flow.captureStart().
maxDurationMSec: Number
The maximum duration of the packet capture, expressed in milliseconds.
maxPackets: Number
The total maximum number of packets.
maxPacketsLookback: Number
The maximum number of packets from the lookback buffer. The lookback buffer refers to packets captured before the call to Flow.captureStart().

The following is an example of Flow.captureStart():

// EVENT: HTTP_REQUEST
// capture facebook HTTP traffic flows
if (HTTP.uri.indexOf("www.facebook.com") !== -1) {
   var name = "facebook-" + HTTP.uri;
   //packet capture options: capture 20 packets, up to 10 from the
lookback buffer
   var opts = {
      maxPackets: 20,
      maxPacketsLookback: 10
   };
   Flow.captureStart(name, opts);
}
Note:
  • The Flow.captureStart() function call requires that you have a license for precision packet capture.
  • You can specify the number of bytes per packet (snaplen) you want to capture when configuring the trigger in the ExtraHop Web UI. This option is available only on some events. See Advanced trigger options for more information.
  • Captured files are available in the ExtraHop Admin UI.
  • Once the packet capture drive is full, no new captures will be recorded until the user deletes the files manually.
  • The maximum file name string length is 256 characters. If the name exceeds 256 characters, it will be truncated and a warning message will be visible in the debug log, but the trigger will continue to execute.
  • The capture file size is the whichever maximum is reached first between the maxPackets and maxBytes options.
  • The size of the capture lookback buffer is whichever maximum is reached first between the maxPacketsLookback and maxBytesLookback options.
  • Each passed max* parameter will capture up to the next packet boundary.
  • If the packet capture was already started on the current flow, Flow.captureStart() calls result in a warning visible in the debug log, but the trigger will continue to run.
  • There is a maximum of 128 concurrent packet captures in the system. If that limit is reached, subsequent calls to Flow.captureStart() will generate a warning visible in the debug log, but the trigger will continue to execute.
captureStop(): Boolean
Stops a packet capture that is in progress on the current flow.
commitRecord1(): void
Commits a record object to the ExtraHop Explore appliance that represents data sent from device1 in a single direction on the flow.

You can call this method only on FLOW_RECORD events, and each unique record is committed only once for built-in records.

To view the properties committed to the record object, see the record property below.

commitRecord2(): void
Commits a record object to the ExtraHop Explore appliance that represents data sent from device2 in a single direction on the flow.

You can call this method only on FLOW_RECORD events, and each unique record is committed only once for built-in records.

To view the properties committed to the record object, see the record property below.

findCustomDevice(deviceID: String): Device
Returns a single Device object that corresponds to the specified deviceID parameter if the device is located on either side of the flow. Returns null if no corresponding device is found.
getApplications(): String
Retrieves all applications associated with the flow.

Properties

The Flow object properties and methods discussed in this section are available to every L7 trigger event associated with the flow.

By default, the ExtraHop system uses loosely-initiated protocol classification, so it will try to classify flows even after the connection was initiated. Loose initiation can be turned off for ports that do not always carry the protocol traffic (e.g., the wildcard port 0). For such flows, device1, port1, and ipaddr1 represent the device with the numerically lower IP address and device2, port2, and ipaddr2 represent the device with the numerically higher IP address.

age: Number
The time elapsed since the flow was initiated, expressed in seconds.
bytes1: Number
The number of L4 payload bytes transmitted by one of two devices in the flow; the other device is represented by bytes2. The device represented by bytes1 remains consistent for the flow.

Access only on FLOW_TICK, FLOW_TURN, or FLOW_RECORD events or an error will occur.

bytes2: Number
The number of L4 payload bytes transmitted by one of two devices in the flow; the other device is represented by bytes1. The device represented by bytes2 remains consistent for the flow.

Access only on FLOW_TICK, FLOW_TURN, or FLOW_RECORD events or an error will occur.

customDevices1: Array
An array of custom Device objects on a flow. Custom devices on the other side of the flow are available by accessing customDevices2. The device represented by customDevices1 remains consistent for the flow.
customDevices2: Array
An array of custom Device objects on a flow. Custom devices on the other side of the flow are available by accessing customDevices1. The device represented by customDevices2 remains consistent for the flow.
device1: Device
The Device object associated with one of two devices in the flow; the other device is represented by device2. The device represented by device1 remains consistent for the flow. For example, Flow.device1.hwaddr accesses the MAC addresses of this device in the flow.
equals: Boolean
Performs an equality test between Device objects.
device2: Device
The Device object associated with one of two devices in the flow; the other device is represented by device1. The device represented by device2 remains consistent for the flow. For example, Flow.device2.hwaddr accesses the MAC addresses of this device in the flow.
equals: Boolean
Performs an equality test between Device objects.
dscp1: Number
The number representing the last Differentiated Services Code Point (DSCP) value transmitted by one of two devices in the flow; the other device is represented by dscp2. The device represented by dscp1 remains consistent for the flow.
dscp2: Number
The lnumber representing the last Differentiated Services Code Point (DSCP) value transmitted by one of two devices in the flow; the other device is represented by dscp1. The device represented by dscp2 remains consistent for the flow.
dscpBytes1: Array
An array that contains the number of L2 bytes for a specific Differentiated Services Code Point (DSCP) value transmitted by one of two devices in the flow; the other device is represented by dscpBytes2. The device represented by dscpBytes1 remains consistent for the flow.

The value is zero for each entry that has no bytes of the specific DSCP since the last FLOW_TICK event.

Access only on FLOW_TICK or FLOW_TURN events or an error will occur.

dscpBytes2: Array
An array that contains the number of L2 bytes for a specific Differentiated Services Code Point (DSCP) value transmitted by one of two devices in the flow; the other device is represented by dscpBytes1. The device represented by dscpBytes2 remains consistent for the flow.

The value is zero for each entry that has no bytes of the specific DSCP since the last FLOW_TICK event.

Access only on FLOW_TICK or FLOW_TURN events or an error will occur.

dcspName1: String
The name associated with the DSCP value transmitted by one of two devices in the flow; the other device is represented by dscpName2. The device represented by dscpName1 remains consistent for the flow.

See the dscpName property in the Endpoints section for a list of supported DSCP code names.

dcspName1: String
The name associated with the DSCP value transmitted by one of two devices in the flow; the other device is represented by dscpName1. The device represented by dscpName2 remains consistent for the flow.

See the dscpName property in the Endpoints section for a list of supported DSCP code names.

dscpPkts1: Array
An array that contains the number of L2 packets for a given Differentiated Services Code Point (DSCP) value transmitted by one of two devices in the flow; the other device is represented by dscpPkts2. The device represented by dscpPkts1 remains consistent for the flow.

The value is zero for each entry that has no packets of the specific DSCP since the last FLOW_TICK event.

Access only on FLOW_TICK or FLOW_TURN events or an error will occur.

dscpPkts2: Array
An array that contains the number of L2 packets for a given Differentiated Services Code Point (DSCP) value transmitted by one of two devices in the flow; the other device is represented by dscpPkts1. The device represented by dscpPkts2 remains consistent for the flow.

The value is zero for each entry that has no packets of the specific DSCP since the last FLOW_TICK event.

Access only on FLOW_TICK or FLOW_TURN events or an error will occur.

fragPkts1: Number
The number of packets resulting from IP fragmentation transmitted by one of two devices in the flow; the other device is represented by fragPkts2. The device represented by fragPkts1 remains consistent for the flow.

Access only on FLOW_TICK or FLOW_TURN events or an error will occur.

fragPkts2: Number
The number of packets resulting from IP fragmentation transmitted by one of two devices in the flow; the other device is represented by fragPkts1. The device represented by fragPkts2 remains consistent for the flow.

Access only on FLOW_TICK or FLOW_TURN events or an error will occur.

id: String
The unique identifier of a Flow record.
ipaddr: IPAddress
TheIPAddress object associated with a device in the flow. Specify the device role in the syntax—for example, Flow.client.ipaddr or Flow.receiver.ipaddr.
equals: Boolean
Performs an equality test between IPAddress objects.
ipproto: String
The IP protocol associated with the flow, such as TCP or UDP.
ipver: String
The IP version associated with the flow, such as IPv4 or IPv6.
isAborted: Boolean
The value is true if a TCP flow has been aborted through a TCP reset (RST). The flow can be aborted by a device. If applicable, specify the device role in the syntax—for example, Flow.client.isAborted or Flow.receiver.isAborted.

This condition may be detected in the TCP_CLOSE event and in any impacted L7 events (for example, HTTP_REQUEST or DB_RESPONSE).

Note:
  • An L4 abort occurs when a TCP connection is closed with a RST instead of a graceful shutdown.
  • An L7 response abort occurs when a connection closes while in the middle of a response. This can be due to a RST, a graceful FIN shutdown, or an expiration.
  • An L7 request abort occurs when a connection closes in the middle of a request. This can also be due to a RST, a graceful FIN shutdown, or an expiration.
isExpired: Boolean
The value is true if the flow expired at the time of the event.
isShutdown: Boolean
The value is true if the device initiated the shutdown of the TCP connection. Specify the device role in the syntax—for example, Flow.client.isShutdown or Flow.receiver.isShutdown.
l2Bytes1: Number
The number of L2 bytes, including the ethernet headers, transmitted by one of two devices in the flow; the other device is represented by l2Bytes2. The device represented by l2Bytes1 remains consistent for the flow.

Access only on FLOW_TICK or FLOW_TURN events or an error will occur.

l2Bytes2: Number
The number of L2 bytes, including the ethernet headers, transmitted by one of two devices in the flow; the other device is represented by l2Bytes1. The device represented by l2Bytes2 remains consistent for the flow.

Access only on FLOW_TICK or FLOW_TURN events or an error will occur.

l7proto: String
The L7 protocol associated with the flow. For known protocols, the property returns a string representing the protocol name, such as HTTP, DB, Memcache. For lesser-known protocols, the property returns a string formatted as ipproto:porttcp:13724 or udp:11258 For custom protocol names, the property returns a string representing the name set through the Protocol Classification section in the Admin UI.

This property is not valid during TCP_OPEN events.

nagleDelay1: Number
The number of Nagle delays associated with one of two devices in the flow; the other device is represented by nagleDelay2. The device represented by nagleDelay1 remains consistent for the flow.

Access only on FLOW_TICK or FLOW_TURN events or an error will occur.

nagleDelay2: Number
The number of Nagle delays associated with one of two devices in the flow; the other device is represented by nagleDelay1. The device represented by nagleDelay2 remains consistent for the flow.

Access only on FLOW_TICK or FLOW_TURN events or an error will occur.

overlapFragPkts1: Number
The number of non-identical IP fragment packets transmitted by one of two devices in the flow; the other device is represented by overlapFragPkts2. The device represented by overlapFragPkts1 remains consistent for the flow.

Access only on FLOW_TICK or FLOW_TURN events or an error will occur.

overlapFragPkts2: Number
The number of non-identical IP fragment packets transmitted by one of two devices in the flow; the other device is represented by overlapFragPkts1. The device represented by overlapFragPkts2 remains consistent for the flow.

Access only on FLOW_TICK or FLOW_TURN events or an error will occur.

overlapSegments1: Number
The number of non-identical TCP segments where two or more segments contain data for the same part of the flow. The TCP segments are transmitted by one of two devices in the flow; the other device is represented by overlapSegments2. The device represented by overlapSegments1 remains consistent for the flow.

Access only on FLOW_TICK or FLOW_TURN events or an error will occur.

overlapSegments2: Number
The number of non-identical TCP segments where two or more segments contain data for the same part of the flow. The TCP segments are transmitted by one of two devices in the flow; the other device is represented by overlapSegments1. The device represented by overlapSegments2 remains consistent for the flow.

Access only on FLOW_TICK or FLOW_TURN events or an error will occur.

payload1: Buffer
The payload Buffer associated with one of two devices in the flow; the other device is represented by payload2. The device represented by payload1 remains consistent for the flow.

Access only on TCP_PAYLOAD, UDP_PAYLOAD, and SSL_PAYLOAD events or an error will occur.

payload2: Buffer
The payload Buffer associated with one of two devices in the flow; the other device is represented by payload1. The device represented by payload2 remains consistent for the flow.

Access only on TCP_PAYLOAD, UDP_PAYLOAD, or SSL_PAYLOAD events or an error will occur.

pkts1: Number
The number of packets transmitted by one of two devices in the flow; the other device is represented by pkts2. The device represented by pkts1 remains consistent for the flow.

Access only on FLOW_TICK, FLOW_TURN, or FLOW_RECORD events or an error will occur.

pkts2: Number
The number of packets transmitted by one of two devices in the flow; the other device is represented by pkts1. The device represented by pkts2 remains consistent for the flow.

Access only on FLOW_TICK, FLOW_TURN, or FLOW_RECORD events or an error will occur.

port1: Number
The port number associated with one of two devices in a flow; the other device is represented by port2. The device represented by port1 remains consistent for the flow.
port2: Number
The port number associated with one of two devices in a flow; the other device is represented by port1. The device represented by port2 remains consistent for the flow.
rcvWndThrottle1: Number
The number of receive window throttles sent from one of two devices in the flow; the other device is represented by rcvWndThrottle2. The device represented by rcvWndThrottle1 remains consistent for the flow.

Access only on FLOW_TICK or FLOW_TURN events or an error will occur.

rcvWndThrottle2: Number
The number of receive window throttles sent from one of two devices in the flow; the other device is represented by rcvWndThrottle1. The device represented by rcvWndThrottle2 remains consistent for the flow.

Access only on FLOW_TICK or FLOW_TURN events or an error will occur.

record1: Object
The record object committed to the ExtraHop Explore appliance through a call to Flow.commitRecord1() on a FLOW_RECORD event.

The object represents traffic sent in a single direction from one of two devices in the flow; the other device is represented by the record2 property. The device represented by the record1 property remains consistent for the flow.

Access the record object only on FLOW_RECORD events or an error will occur.

The record object contains the following default properties:

  • age
  • bytes (L3)
  • dscpName
  • first
  • last
  • pkts
  • proto
  • senderAddr
  • senderPort
  • receiverAddr
  • receiverPort
  • tcpFlags
record2: Object
The record object committed to the ExtraHop Explore appliance through a call to Flow.commitRecord2() on a FLOW_RECORD event.

The object represents traffic sent in a single direction from one of two devices in the flow; the other device is represented by the record1 property. The device represented by the record2 property remains consistent for the flow.

Access the record object only on FLOW_RECORD events or an error will occur.

The record object contains the following default properties:

  • age
  • bytes (L3)
  • dscpName
  • first
  • last
  • pkts
  • proto
  • senderAddr
  • senderPort
  • receiverAddr
  • receiverPort
  • tcpFlags
roundTripTime: Number
The median round trip time (RTT) for the duration of the event, expressed in milliseconds. The value is NaN if there are no RTT samples.

Access only on FLOW_TICK or FLOW_TURN events or an error will occur.

rto1: Number
The number of RTOs associated with one of two devices in the flow; the other device is represented by rto2. The device represented by rto1 remains consistent for the flow.

Access only on FLOW_TICK or FLOW_TURN events or an error will occur.

rto2: Number
The number of RTOs associated with one of two devices in the flow; the other device is represented by rto1. The device represented by rto2 remains consistent for the flow.

Access only on FLOW_TICK or FLOW_TURN events or an error will occur.

store: Object
The flow store is designed to pass objects from request to response on the same flow. The store object is an instance of an empty JavaScript object. Objects can be attached to the store as properties by defining the property key and property value. For example:
Flow.store.myobject = "myvalue";

For events that occur on the same flow, you can apply the flow store instead of the session table to share information. For example:

/* request */ 
Flow.store.userAgent = HTTP.userAgent;  

/* response */ 
var userAgent = Flow.store.userAgent;
Important:Flow store values persist across all requests and responses carried on that flow. When working with the flow store, it is a best practice to set the flow store variable to null when its value should not be conveyed to the next request or response. This practice has the added benefit of conserving flow store memory.

Most flow store triggers should have a structure similar to the following example:

if (event === 'DB_REQUEST') {
                 if (DB.statement) {
                 Flow.store.stmt = DB.statement; 
} else {
                 Flow.store.stmt = null; 
} 
} 
else if (event === 'DB_RESPONSE') {
        var stmt = Flow.store.stmt;
        Flow.store.stmt = null;
        if (stmt) {
                 // Do something with ‘stmt’;   
                 // e.g., commit a metric  
        } 
}
vlan: Number
The VLAN number associated with the flow. If no VLAN tag is present, this value is set to 0.
zeroWnd1: Number
The number of zero windows associated with one of two devices in the flow; the other device is represented by zeroWnd2. The device represented by zeroWnd1 remains consistent for the flow.

Access only on FLOW_TICK or FLOW_TURN events or an error will occur.

zeroWnd2: Number
The number of zero windows associated with one of two devices in the flow; the other device is represented by zeroWnd1. The device represented by zeroWnd2 remains consistent for the flow.

Access only on FLOW_TICK or FLOW_TURN events or an error will occur.

FlowInterface

The FlowInterface class enables you to retrieve flow interface attributes and to add custom metrics at the interface level.

Methods

FlowInterface(id: string)
A constructor for the FlowInterface object that accepts a flow interface ID. An error occurs if the flow interface ID does not exist on the ExtraHop appliance.

Instance methods

The methods in this section enable you to create custom metrics on a flow interface. The methods are present only on instances of the NetFlow class. For example, the following statement collects metrics from NetFlow traffic on the ingress interface:

NetFlow.ingressInterface.metricAddCount("slow_rsp", 1);

However, you can call the FlowInterface method as a static method on NETFLOW_RECORD events. For example, the following statement collects metrics from NetFlow traffic on both the ingress and egress interfaces:

FlowInterface.metricAddCount("slow_rsp", 1);
metricAddCount (metric_name: String, count: Number, [options: Object]):void
Creates a custom top-level count metric. Commits the metric data to the specified application.
metric_name: String
The name of the top-level count metric.
count: Number
The increment value. Must be a non-zero, positive signed 64-bit integer. A NaN value is silently discarded.
options: Object
An optional object that can contain the following property:
highPrecision: Boolean
A flag that enables one-second granularity for the custom metric when set to true.
metricAddDetailCount (metric_name: String, key: String | IPAddress, count: Number, [options: Object]):void
Creates a custom detail count metric by which you can drill down. Commits the metric data to the specified application.
metric_name: String
The name of the detail count metric.
key: String | IPAddress
The key specified for the detail metric. A null value is silently discarded.
count: Number
The increment value. Must be a non-zero, positive signed 64-bit integer. A NaN value is silently discarded.
options: Object
An optional object that can contain the following property:
highPrecision: Boolean
A flag that enables one-second granularity for the custom metric when set to true.
metricAddDataset (metric_name: String, val: Number, [options: Object]):void
Creates a custom top-level dataset metric. Commits the metric data to the specified application.
metric_name: String
The name of the top-level dataset metric.
val: Number
The observed value, such as a processing time. Must be a non-zero, positive signed 64-bit integer. A NaN value is silently discarded.
options: Object
An optional object that can contain the following properties:
freq: Number
An option that enables you to simultaneously record multiple occurrences of particular values in the dataset when set to the number of occurrences specified by the val parameter. If no value is specified, the default value is 1.
highPrecision: Boolean
A flag that enables one-second granularity for the custom metric when set to true.
metricAddDetailDataset (metric_name: String, key: String | IPAddress, val: Number, [options: Object]):void
Creates a custom detail dataset metric by which you can drill down. Commits the metric data to the specified application.
metric_name: String
The name of the detail count metric.
key: String | IPAddress
The key specified for the detail metric. A null value is silently discarded.
val: Number
The observed value, such as a processing time. Must be a non-zero, positive signed 64-bit integer. A NaN value is silently discarded.
options: Object
An optional object that can contain the following properties:
freq: Number
An option that enables you to simultaneously record multiple occurrences of particular values in the dataset when set to the number of occurrences specified by the val parameter. If no value is specified, the default value is 1.
highPrecision: Boolean
A flag that enables one-second granularity for the custom metric when set to true.
metricAddDistinct (metric_name: String, item: Number | String | IPAddress:void
Creates a custom top-level distinct count metric. Commits the metric data to the specified application.
metric_name: String
The name of the top-level distinct count metric.
item: Number | String | IPAddress
The value to be placed into the HyperLogLog set specified by the metric_name parameter. The value is converted to a string before it is placed in the HyperLogLog set.
metricAddDetailDistinct (metric_name: String, key: String | IPAddress, item: Number | String | IPAddress:void
Creates a custom detail distinct count metric by which you can drill down. Commits the metric data to the specified application.
metric_name: String
The name of the detail distinct count metric.
key: String | IPAddress
The key specified for the detail metric. A null value is silently discarded.
item: Number | String | IPAddress
The value to be placed into the HyperLogLog set specified by the metric_name parameter. The value is converted to a string before it is placed in the HyperLogLog set.
metricAddMax (metric_name: String, val: Number, [options: Object]):void
Creates a custom top-level maximum metric. Commits the metric data to the specified application.
metric_name: String
The name of the top-level maximum metric.
val: Number
The observed value, such as a processing time. Must be a non-zero, positive signed 64-bit integer. A NaN value is silently discarded.
options: Object
An optional object that can contain the following properties:
highPrecision: Boolean
A flag that enables one-second granularity for the custom metric when set to true.
metricAddDetailMax (metric_name: String, key: String | IPAddress, val: Number, [options: Object]):void
Creates a custom detail maximum metric by which you can drill down. Commits the metric data to the specified application.
metric_name: String
The name of the detail maximum metric.
key: String | IPAddress
The key specified for the detail metric. A null value is silently discarded.
val: Number
The observed value, such as a processing time. Must be a non-zero, positive signed 64-bit integer. A NaN value is silently discarded.
options: Object
An optional object that can contain the following properties:
highPrecision: Boolean
A flag that enables one-second granularity for the custom metric when set to true.
metricAddSampleset (metric_name: String, val: Number, [options: Object]):void
Creates a custom top-level sampleset metric. Commits the metric data to the specified application.
metric_name: String
The name of the top-level sampleset metric.
val: Number
The observed value, such as a processing time. Must be a non-zero, positive signed 64-bit integer. A NaN value is silently discarded.
options: Object
An optional object that can contain the following properties:
highPrecision: Boolean
A flag that enables one-second granularity for the custom metric when set to true.
metricAddDetailSampleset (metric_name: String, key: String | IPAddress, val: Number, [options: Object]):void
Creates a custom detail sampleset metric by which you can drill down. Commits the metric data to the specified application.
metric_name: String
The name of the detail sampleset metric.
key: String | IPAddress
The key specified for the detail metric. A null value is silently discarded.
val: Number
The observed value, such as a processing time. Must be a non-zero, positive signed 64-bit integer. A NaN value is silently discarded.
options: Object
An optional object that can contain the following properties:
highPrecision: Boolean
A flag that enables one-second granularity for the custom metric when set to true.
metricAddSnap (metric_name: String, count: Number, [options: Object]):void
Creates a custom top-level snapshot metric. Commits the metric data to the specified application.
metric_name: String
The name of the top-level snapshot metric.
count: Number
The observed value, such as current established connections. Must be a non-zero, positive signed 64-bit integer. A NaN value is silently discarded.
options: Object
An optional object that can contain the following properties:
highPrecision: Boolean
A flag that enables one-second granularity for the custom metric when set to true.
metricAddDetailSnap (metric_name: String, key: String | IPAddress, count: Number, [options: Object]):void
Creates a custom detail snapshot metric by which you can drill down. Commits the metric data to the specified application.
metric_name: String
The name of the detail sampleset metric.
key: String | IPAddress
The key specified for the detail metric. A null value is silently discarded.
count: Number
The observed value, such as current established connections. Must be a non-zero, positive signed 64-bit integer. A NaN value is silently discarded.
options: Object
An optional object that can contain the following properties:
highPrecision: Boolean
A flag that enables one-second granularity for the custom metric when set to true.

Instance properties

id: String
A string that uniquely identifies the flow interface.
number: Number
The flow interface number reported by the NetFlow record.

FlowNetwork

The FlowNetwork class enables you to retrieve flow network attributes and to add custom metrics at the flow network level.

Methods

FlowNetwork(id: string)
A constructor for the FlowNetwork object that accepts a flow network ID. An error occurs if the flow network ID does not exist on the ExtraHop appliance.

Instance methods

The methods in this section enable you to create custom metrics on a flow network. The methods are present only on instances of the NetFlow class. For example, the following statement collects metrics from NetFlow traffic on an individual network:

NetFlow.network.metricAddCount("slow_rsp", 1);

However, you can call the FlowNetwork method as a static method on NETFLOW_RECORD events. For example, the following statement collects metrics from NetFlow traffic on both devices on the flow network:

FlowNetwork.metricAddCount("slow_rsp", 1);
metricAddCount (metric_name: String, count: Number, [options: Object]):void
Creates a custom top-level count metric. Commits the metric data to the specified application.
metric_name: String
The name of the top-level count metric.
count: Number
The increment value. Must be a non-zero, positive signed 64-bit integer. A NaN value is silently discarded.
options: Object
An optional object that can contain the following property:
highPrecision: Boolean
A flag that enables one-second granularity for the custom metric when set to true.
metricAddDetailCount (metric_name: String, key: String | IPAddress, count: Number, [options: Object]):void
Creates a custom detail count metric by which you can drill down. Commits the metric data to the specified application.
metric_name: String
The name of the detail count metric.
key: String | IPAddress
The key specified for the detail metric. A null value is silently discarded.
count: Number
The increment value. Must be a non-zero, positive signed 64-bit integer. A NaN value is silently discarded.
options: Object
An optional object that can contain the following property:
highPrecision: Boolean
A flag that enables one-second granularity for the custom metric when set to true.
metricAddDataset (metric_name: String, val: Number, [options: Object]):void
Creates a custom top-level dataset metric. Commits the metric data to the specified application.
metric_name: String
The name of the top-level dataset metric.
val: Number
The observed value, such as a processing time. Must be a non-zero, positive signed 64-bit integer. A NaN value is silently discarded.
options: Object
An optional object that can contain the following properties:
freq: Number
An option that enables you to simultaneously record multiple occurrences of particular values in the dataset when set to the number of occurrences specified by the val parameter. If no value is specified, the default value is 1.
highPrecision: Boolean
A flag that enables one-second granularity for the custom metric when set to true.
metricAddDetailDataset (metric_name: String, key: String | IPAddress, val: Number, [options: Object]):void
Creates a custom detail dataset metric by which you can drill down. Commits the metric data to the specified application.
metric_name: String
The name of the detail count metric.
key: String | IPAddress
The key specified for the detail metric. A null value is silently discarded.
val: Number
The observed value, such as a processing time. Must be a non-zero, positive signed 64-bit integer. A NaN value is silently discarded.
options: Object
An optional object that can contain the following properties:
freq: Number
An option that enables you to simultaneously record multiple occurrences of particular values in the dataset when set to the number of occurrences specified by the val parameter. If no value is specified, the default value is 1.
highPrecision: Boolean
A flag that enables one-second granularity for the custom metric when set to true.
metricAddDistinct (metric_name: String, item: Number | String | IPAddress:void
Creates a custom top-level distinct count metric. Commits the metric data to the specified application.
metric_name: String
The name of the top-level distinct count metric.
item: Number | String | IPAddress
The value to be placed into the HyperLogLog set specified by the metric_name parameter. The value is converted to a string before it is placed in the HyperLogLog set.
metricAddDetailDistinct (metric_name: String, key: String | IPAddress, item: Number | String | IPAddress:void
Creates a custom detail distinct count metric by which you can drill down. Commits the metric data to the specified application.
metric_name: String
The name of the detail distinct count metric.
key: String | IPAddress
The key specified for the detail metric. A null value is silently discarded.
item: Number | String | IPAddress
The value to be placed into the HyperLogLog set specified by the metric_name parameter. The value is converted to a string before it is placed in the HyperLogLog set.
metricAddMax (metric_name: String, val: Number, [options: Object]):void
Creates a custom top-level maximum metric. Commits the metric data to the specified application.
metric_name: String
The name of the top-level maximum metric.
val: Number
The observed value, such as a processing time. Must be a non-zero, positive signed 64-bit integer. A NaN value is silently discarded.
options: Object
An optional object that can contain the following properties:
highPrecision: Boolean
A flag that enables one-second granularity for the custom metric when set to true.
metricAddDetailMax (metric_name: String, key: String | IPAddress, val: Number, [options: Object]):void
Creates a custom detail maximum metric by which you can drill down. Commits the metric data to the specified application.
metric_name: String
The name of the detail maximum metric.
key: String | IPAddress
The key specified for the detail metric. A null value is silently discarded.
val: Number
The observed value, such as a processing time. Must be a non-zero, positive signed 64-bit integer. A NaN value is silently discarded.
options: Object
An optional object that can contain the following properties:
highPrecision: Boolean
A flag that enables one-second granularity for the custom metric when set to true.
metricAddSampleset (metric_name: String, val: Number, [options: Object]):void
Creates a custom top-level sampleset metric. Commits the metric data to the specified application.
metric_name: String
The name of the top-level sampleset metric.
val: Number
The observed value, such as a processing time. Must be a non-zero, positive signed 64-bit integer. A NaN value is silently discarded.
options: Object
An optional object that can contain the following properties:
highPrecision: Boolean
A flag that enables one-second granularity for the custom metric when set to true.
metricAddDetailSampleset (metric_name: String, key: String | IPAddress, val: Number, [options: Object]):void
Creates a custom detail sampleset metric by which you can drill down. Commits the metric data to the specified application.
metric_name: String
The name of the detail sampleset metric.
key: String | IPAddress
The key specified for the detail metric. A null value is silently discarded.
val: Number
The observed value, such as a processing time. Must be a non-zero, positive signed 64-bit integer. A NaN value is silently discarded.
options: Object
An optional object that can contain the following properties:
highPrecision: Boolean
A flag that enables one-second granularity for the custom metric when set to true.
metricAddSnap (metric_name: String, count: Number, [options: Object]):void
Creates a custom top-level snapshot metric. Commits the metric data to the specified application.
metric_name: String
The name of the top-level snapshot metric.
count: Number
The observed value, such as current established connections. Must be a non-zero, positive signed 64-bit integer. A NaN value is silently discarded.
options: Object
An optional object that can contain the following properties:
highPrecision: Boolean
A flag that enables one-second granularity for the custom metric when set to true.
metricAddDetailSnap (metric_name: String, key: String | IPAddress, count: Number, [options: Object]):void
Creates a custom detail snapshot metric by which you can drill down. Commits the metric data to the specified application.
metric_name: String
The name of the detail sampleset metric.
key: String | IPAddress
The key specified for the detail metric. A null value is silently discarded.
count: Number
The observed value, such as current established connections. Must be a non-zero, positive signed 64-bit integer. A NaN value is silently discarded.
options: Object
An optional object that can contain the following properties:
highPrecision: Boolean
A flag that enables one-second granularity for the custom metric when set to true.

Instance properties

id: String
A string that uniquely identifies the flow network.
ipaddr: IPAddress
The IP address of the management interface on the flow network.

GeoIP

The GeoIP class enables you to retrieve the approximate country-level or city-level location of a specific address.

Methods

Values returned by GeoIP methods are obtained from the MaxMind GeoLite2 Country database or the MaxMind GeoLite2 City database unless configured otherwise by the Geomap data source settings in the ExtraHop Admin UI.

From the Geomap Data Source settings, you can upload custom databases and specify which database to reference by default for city or country lookups.

We recommend uploading only a custom city-level database if you intend to call both GeoIP.getCountry() and GeoIP.getPreciseLocation() methods in triggers. If both types of custom databases are uploaded, the ExtraHop system retrieves values for both methods from the city-level database and ignores the country-level database, which is considered to be a subset of the city-level database.

getCountry(ipaddr: IPAddress): Object
Returns country-level detail for the specified IPAddress in an object that contains the following fields:
continentName: String
The name of the continent, such as Europe, that is associated with the country from which the specified IP address originates. The value is the same as the continentName field returned by the getPreciseLocation() method.
continentCode: Number
The code of the continent, such as EU, that is associated with the value of the countryCode field, according to ISO 3166. The value is the same as the continentCode field returned by the getPreciseLocation() method.
countryName: String
The name of the country from which the specified IP address originates, such as United States. The value is the same as the countryName field returned by the getPreciseLocation() method.
countryCode: String
The code associated with the country, according to ISO 3166, such as US. The value is the same as the countryCode field returned by the getPreciseLocation() method.

Returns null in any field for which no data is available, or returns a null object if all field data is unavailable.

Note:The getCountry() method requires 20 MB of total RAM on the ExtraHop Discover appliance, which might affect system performance. The first time this method is called in any trigger, the ExtraHop system reserves the required amount of RAM unless the getPreciseLocation() method has already been called. The getPreciseLocation() method requires 100 MB of RAM, so adequate RAM will already be available to call the getCountry() method. The required amount of RAM is not per trigger or per method call; the ExtraHop system only reserves the required amount of RAM one time.

In the following code example, the getCountry() method is called on each specified event and retrieves rough location data for each client IP address:

// ignore if the IP address is non-routable
if (Flow.client.ipaddr.isRFC1918) return;
var results=GeoIP.getCountry(Flow.client.ipaddr);
if (results) {
    countryCode=results.countryCode;
    // log the 2-letter country code of each IP address 
    debug ("Country Code is " + results.countryCode);
}
getPreciseLocation(ipaddr: IPAddress): Object
Returns city-level detail for the specified IPAddress in an object that contains the following fields:
continentName: String
The name of the continent, such as Europe, that is associated with the country from which the specified IP address originates. The value is the same as the continentName field returned by the getCountry() method.
continentCode: Number
The code of the continent, such as EU, that is associated with the value of the countryCode field, according to ISO 3166. The value is the same as the continentCode field returned by the getCountry() method.
countryName: String
The name of the country from which the specified IP address originates, such as United States. The value is the same as the countryName field returned by the getCountry() method.
countryCode: String
The code associated with the country, according to ISO 3166, such as US. The value is the same as the countryCode field returned by the getCountry() method.
region: String
The region, such as a state or province, such as Washington.
city: String
The city from which the IP address originates, such as Seattle.
latitude: Number
The latitude of the IP address location.
longitude: Number
The longitude of the of the IP address location.
radius: Number
The radius, expressed in kilometers, around the longitude and latitude coordinates of the IP address location.

Returns null in any field for which no data is available, or returns a null object if all field data is unavailable.

Note:The getPreciseLocation() method requires 100 MB of total RAM on the ExtraHop Discover appliance, which might affect system performance. The first time this method is called in any trigger, the ExtraHop system reserves the required amount of RAM unless the getCountry() method has already been called. The getCountry() method requires 20 MB of RAM, so the ExtraHop system reserves an additional 80 MB of RAM. The required amount of RAM is not per trigger or per method call; the ExtraHop system only reserves the required amount of RAM one time.

IPAddress

The IPAddress class enables you to retrieve IP address attributes. The IPAddress class is also available as a property for the Flow class.

Methods

IPAddress (ip: String | Number, [mask: Number])
Constructor for the IPAddress class that takes two parameters:
ip: String
The IP address string in CIDR format.
mask: Number
The subnet mask in a numerical format, representing the number of leftmost '1' bits in the mask (optional).

Instance methods

equals (equals: IPAddress): Boolean
Performs an equality test between IPAddress objects as shown in the following example:
if (Flow.client.ipaddr.toString() === "10.10.10.10")
{ // perform a task }
mask (mask: Number): IPAddress
Sets the subnet mask of the IPAddress object as shown in the following example:
if ((Flow.ipaddr1.mask(24).toString() === "173.194.33.0")||
(Flow.ipaddr2.mask(24).toString() === "173.194.33.0"))
{Flow.setApplication("My L4 App");}

The mask parameter specifies the subnet mask in a numerical format, representing the number of leftmost '1' bits in the mask (optional).

toJSON(): string
Converts the IPAddress object to JSON format.
toString(): String
Converts the IPAddress object to a printable string.

Properties

hostNames: Array of Strings
An array of hostnames associated with the IPAddress.
isBroadcast: Boolean
The value is true if the IP address is a broadcast address.
isExternal: Boolean
The value is true if the IP address is external to your network.
isLinkLocal: Boolean
The value is true if the IP address is a link local address such as (169.254.0.0/16).
isMulticast: Boolean
The value is true if the IP address is a multicast address.
isRFC1918: Boolean
The value is true if the IP address belongs to one of the RFC1918 private IP ranges (10.0.0.0/8, 172.16.0.0/12, 192.168.0.0/16). The value is always false for IPv6 addresses.
isV4: Boolean
The value is true if the IP address is an IPv4 address.
isV6: Boolean
The value is true if the IP address is an IPv6 address.

Network

The Network class enables you to add custom metrics at the global level.

Methods

metricAddCount (metric_name: String, count: Number, [options: Object]):void
Creates a custom top-level count metric. Commits the metric data to the specified application.
metric_name: String
The name of the top-level count metric.
count: Number
The increment value. Must be a non-zero, positive signed 64-bit integer. A NaN value is silently discarded.
options: Object
An optional object that can contain the following property:
highPrecision: Boolean
A flag that enables one-second granularity for the custom metric when set to true.
metricAddDetailCount (metric_name: String, key: String | IPAddress, count: Number, [options: Object]):void
Creates a custom detail count metric by which you can drill down. Commits the metric data to the specified application.
metric_name: String
The name of the detail count metric.
key: String | IPAddress
The key specified for the detail metric. A null value is silently discarded.
count: Number
The increment value. Must be a non-zero, positive signed 64-bit integer. A NaN value is silently discarded.
options: Object
An optional object that can contain the following property:
highPrecision: Boolean
A flag that enables one-second granularity for the custom metric when set to true.
metricAddDataset (metric_name: String, val: Number, [options: Object]):void
Creates a custom top-level dataset metric. Commits the metric data to the specified application.
metric_name: String
The name of the top-level dataset metric.
val: Number
The observed value, such as a processing time. Must be a non-zero, positive signed 64-bit integer. A NaN value is silently discarded.
options: Object
An optional object that can contain the following properties:
freq: Number
An option that enables you to simultaneously record multiple occurrences of particular values in the dataset when set to the number of occurrences specified by the val parameter. If no value is specified, the default value is 1.
highPrecision: Boolean
A flag that enables one-second granularity for the custom metric when set to true.
metricAddDetailDataset (metric_name: String, key: String | IPAddress, val: Number, [options: Object]):void
Creates a custom detail dataset metric by which you can drill down. Commits the metric data to the specified application.
metric_name: String
The name of the detail count metric.
key: String | IPAddress
The key specified for the detail metric. A null value is silently discarded.
val: Number
The observed value, such as a processing time. Must be a non-zero, positive signed 64-bit integer. A NaN value is silently discarded.
options: Object
An optional object that can contain the following properties:
freq: Number
An option that enables you to simultaneously record multiple occurrences of particular values in the dataset when set to the number of occurrences specified by the val parameter. If no value is specified, the default value is 1.
highPrecision: Boolean
A flag that enables one-second granularity for the custom metric when set to true.
metricAddDistinct (metric_name: String, item: Number | String | IPAddress:void
Creates a custom top-level distinct count metric. Commits the metric data to the specified application.
metric_name: String
The name of the top-level distinct count metric.
item: Number | String | IPAddress
The value to be placed into the HyperLogLog set specified by the metric_name parameter. The value is converted to a string before it is placed in the HyperLogLog set.
metricAddDetailDistinct (metric_name: String, key: String | IPAddress, item: Number | String | IPAddress:void
Creates a custom detail distinct count metric by which you can drill down. Commits the metric data to the specified application.
metric_name: String
The name of the detail distinct count metric.
key: String | IPAddress
The key specified for the detail metric. A null value is silently discarded.
item: Number | String | IPAddress
The value to be placed into the HyperLogLog set specified by the metric_name parameter. The value is converted to a string before it is placed in the HyperLogLog set.
metricAddMax (metric_name: String, val: Number, [options: Object]):void
Creates a custom top-level maximum metric. Commits the metric data to the specified application.
metric_name: String
The name of the top-level maximum metric.
val: Number
The observed value, such as a processing time. Must be a non-zero, positive signed 64-bit integer. A NaN value is silently discarded.
options: Object
An optional object that can contain the following properties:
highPrecision: Boolean
A flag that enables one-second granularity for the custom metric when set to true.
metricAddDetailMax (metric_name: String, key: String | IPAddress, val: Number, [options: Object]):void
Creates a custom detail maximum metric by which you can drill down. Commits the metric data to the specified application.
metric_name: String
The name of the detail maximum metric.
key: String | IPAddress
The key specified for the detail metric. A null value is silently discarded.
val: Number
The observed value, such as a processing time. Must be a non-zero, positive signed 64-bit integer. A NaN value is silently discarded.
options: Object
An optional object that can contain the following properties:
highPrecision: Boolean
A flag that enables one-second granularity for the custom metric when set to true.
metricAddSampleset (metric_name: String, val: Number, [options: Object]):void
Creates a custom top-level sampleset metric. Commits the metric data to the specified application.
metric_name: String
The name of the top-level sampleset metric.
val: Number
The observed value, such as a processing time. Must be a non-zero, positive signed 64-bit integer. A NaN value is silently discarded.
options: Object
An optional object that can contain the following properties:
highPrecision: Boolean
A flag that enables one-second granularity for the custom metric when set to true.
metricAddDetailSampleset (metric_name: String, key: String | IPAddress, val: Number, [options: Object]):void
Creates a custom detail sampleset metric by which you can drill down. Commits the metric data to the specified application.
metric_name: String
The name of the detail sampleset metric.
key: String | IPAddress
The key specified for the detail metric. A null value is silently discarded.
val: Number
The observed value, such as a processing time. Must be a non-zero, positive signed 64-bit integer. A NaN value is silently discarded.
options: Object
An optional object that can contain the following properties:
highPrecision: Boolean
A flag that enables one-second granularity for the custom metric when set to true.
metricAddSnap (metric_name: String, count: Number, [options: Object]):void
Creates a custom top-level snapshot metric. Commits the metric data to the specified application.
metric_name: String
The name of the top-level snapshot metric.
count: Number
The observed value, such as current established connections. Must be a non-zero, positive signed 64-bit integer. A NaN value is silently discarded.
options: Object
An optional object that can contain the following properties:
highPrecision: Boolean
A flag that enables one-second granularity for the custom metric when set to true.
metricAddDetailSnap (metric_name: String, key: String | IPAddress, count: Number, [options: Object]):void
Creates a custom detail snapshot metric by which you can drill down. Commits the metric data to the specified application.
metric_name: String
The name of the detail sampleset metric.
key: String | IPAddress
The key specified for the detail metric. A null value is silently discarded.
count: Number
The observed value, such as current established connections. Must be a non-zero, positive signed 64-bit integer. A NaN value is silently discarded.
options: Object
An optional object that can contain the following properties:
highPrecision: Boolean
A flag that enables one-second granularity for the custom metric when set to true.

Session

The Session class provides access to the session table. It is designed to support coordination across multiple independently executing triggers. The session table's global state means any changes by a trigger or external process become visible to all other users of the session table. Because the session table is in-memory, changes are not saved when you restart the ExtraHop appliance or the capture process.

Session table entries can be evicted when the table grows too large or when the configured expiration is reached.

Note:
  • The ExtraHop Command appliance cluster nodes do not share their global states. The ECA does not run triggers; it only manages them.
  • The ExtraHop Open Data Context API exposes the session table via the management network, enabling coordination with external processes through the memcache protocol.

Events

The Session class is not limited only to the SESSION_EXPIRE event. You can apply the Session class to any ExtraHop event.

SESSION_EXPIRE
Runs periodically (in approximately 30 second increments) as long as the session table is in use. When the SESSION_EXPIRE event fires, keys that have expired in the previous 30 second interval are available through the Session.expiredKeys property.

The SESSION_EXPIRE event is not associated with any particular flow, so triggers on SESSION_EXPIRE events cannot commit device metrics through Device.metricAdd*() methods or Flow.client.device.metricAdd*() methods. To commit device metrics on this event, you must add Device objects to the session table through the Device() instance method.

Methods

add(key: String, value*, [options: Object]): *
Adds the specified key in the session table. If the key is present, the corresponding value is returned without modifying the key entry in the table. If the key is not present, a new entry is created for the key and value, and the new value is returned.

You can configure an Options object for the specified key.

getOptions(key: String): Object
Returns the Options object for the specified key. You configure options during calls to Session.add(), Session.modify(), or Session.replace().
increment(key: String, [count: Number]): Number | Null
Looks up the specified key and increments the key value by the specified number. The default count value is 1. Returns the new key value if the call is successful. Returns null if the lookup fails. Returns an error if the key value is not a number.
lookup(key: String): *
Looks up the specified key in the session table and returns the corresponding value. Returns null if the key is not present.
modify(key: String, value: *, [options: Object]): *
Modifies the specified key value, if the key is present in the session table, and returns the previous value. If the key is not present, no new entry is created.

If changes to the Options object are included, the key options are updated. and old options are merged with new ones. If the expire option is modified, the expiration timer is reset.

remove(key: String): *
Removes the entry for the given key and returns the associated value.
replace(key: String, value: *, [options: Object]): *
Updates the entry associated with the given key. If the key is present, update the value and return the previous value. If the key is not present, add the entry and return the previous value (null).

If changes to the Options object is included, the key options are updated, and old options are merged with new ones. If the expire option is provided, the expiration timer is reset.

Options

expire: Number
The duration after which eviction occurrs, expressed in seconds. If the value is null or undefined, the entry is evicted only when the session table grows too large.
notify: Boolean
Indicates whether the key is available on SESSION_EXPIRE events. The default value is false.
priority: String
Priority level that determines which entries to evict if the session table grows too large. Valid values are PRIORITY_LOW, PRIORITY_NORMAL, and PRIORITY_HIGH. The default value is PRIORITY_NORMAL.

Constants

PRIORITY_LOW: Number
Default value is 0.
PRIORITY_NORMAL: Number
Default value is 1.
PRIORITY_HIGH: Number
Default value is 2.

Properties

expiredKeys :Array
An array of objects with the following properties:
age: Number
The age of the expired object, expressed in milliseconds. Age is the amount of time elapsed between when the object in the session table was added or modified, and the SESSION_EXPIRE event. The age determines whether the key was evicted or expired.
name: String
The key of the expired object.
value: Number | String | IPAddress | Boolean | Device
The value of the entry in the session table.

Expired keys include keys that were evicted because the table grew too large.

The expiredKeys property can be accessed only on SESSION_EXPIREevents or an error will occur.

System

The System class enables you to retrieve information about the ExtraHop Discover appliance on which a trigger is running. This information in useful in environments with multiple Discover appliances.

Properties

uuid: string
The universally unique identifier (UUID) of the ExtraHop Discover appliance.
ipaddr: IPAddress
The IPAddress object of the primary management interface (Interface 1) on the ExtraHop Discover appliance.
hostname: string
The hostname for the ExtraHop Discover appliance configured in the ExtraHop Admin UI.

Trigger

The Trigger class enables you to access details about a running trigger.

Properties

isDebugEnabled: boolean
The value is true if debugging is enabled for the trigger. The value is determined by the state of the Enable Debugging checkbox in the Trigger Configuration window of the ExtraHop Web UI.

VLAN

The VLAN class represents a VLAN on the network.

Instance properties

id: Number
The numerical ID for a VLAN.

Protocol and network data classes

The Trigger API classes in this section enable you to access properties and record metrics from protocol, message, and flow activity that occurs on the ExtraHop appliance.

Class Description
AAA Enables you to store metrics and access properties on AAA_REQUEST or AAA_RESPONSE events.
ActiveMQ Enables you to store metrics and access properties on ACTIVEMQ_MESSAGE events.
AJP The AJP class enables you to store metrics and access properties on AJP_REQUEST and AJP_RESPONSE events.
CIFS Enables you to store metrics and access properties on CIFS_REQUEST and CIFS_RESPONSE events.
DB Enables you to store metrics and access properties on DB_REQUEST and DB_RESPONSE events.
DHCP Enables you to store metrics and access properties on DHCP_REQUEST and DHCP_RESPONSE events.
DICOM Enables you to store metrics and access properties on DICOM_REQUEST and DICOM_RESPONSE events.
DNS Enables you to store metrics and access properties on DNS_REQUEST and DNS_RESPONSE events.
FIX Enables you to store metrics and access properties on FIX_REQUEST and FIX_RESPONSE events.
FTP Enables you to store metrics and access properties on FTP_REQUEST and FTP_RESPONSE events.
HL7 Enables you to store metrics and access properties on HL7_REQUEST and HL7_RESPONSE events.
HTTP Enables you to store metrics and access properties on HTTP_REQUEST and HTTP_RESPONSE events.
IBMMQ Enables you to store metrics and access properties on IBMMQ_REQUEST and IBMMQ_RESPONSE events.
ICA Enables you to store metrics and access properties on ICA_OPEN, ICA_AUTH, ICA_TICK, and ICA_CLOSE events.
ICMP Enables you to store metrics and access properties on ICMP_MESSAGE events.
Kerberos Enables you to store metrics and access properties on KERBEROS_REQUEST and KERBEROS_RESPONSE events.
LDAP Enables you to store metrics and access properties on LDAP_REQUEST and LDAP_RESPONSE events.
LLDP Enables you to access properties on LLDP_FRAME events.
Memcache Enables you to store metrics and access properties on MEMCACHE_REQUEST and MEMCACHE_RESPONSE events.
MongoDB The MongoDB class enables you to store metrics and access properties on MONGODB_REQUEST and MONGODB_RESPONSE events.
MSMQ The MSMQ class enables you to store metrics and access properties on MSMQ_MESSAGE event.
NetFlow Enables you to store metrics and access properties on NETFLOW_RECORD events.
NFS Enables you to store metrics and access properties on NFS_REQUEST and NFS_RESPONSE events.
POP3 Enables you to store metrics and access properties on POP3_REQUEST and POP3_RESPONSE events.
Redis Enables you to store metrics and access properties on REDIS_REQUEST and REDIS_RESPONSE events.
RTCP Enables you to store metrics and access properties on RTCP_MESSAGE events.
RTP Enables you to store metrics and access properties on RTP_OPEN, RTP_CLOSE, and RTP_TICK events.
SDP Enables you to access properties on SIP_REQUEST and SIP_RESPONSE events.
SFlow Enables you to store metrics and access properties on SFLOW_RECORD events.
SIP Enables you to store metrics and access properties on SIP_REQUEST and SIP_RESPONSE events.
SMPP Enables you to store metrics and access properties on SMPP_REQUEST and SMPP_RESPONSE events.
SMTP Enables you to store metrics and access properties on SMTP_REQUEST and SMTP_RESPONSE events.
SSH Enables you to store metrics and access properties on SSH_CLOSE, SSH_OPEN and SSH_TICK events.
SSL Enables you to store metrics and access properties on SSL_OPEN, SSL_CLOSE, SSL_ALERT, SSL_RECORD, SSL_HEARTBEAT, and SSL_RENEGOTIATE events.
TCP Enables you to access properties and retrieve metrics from TCP events and on FLOW_TICK and FLOW_TURN events.
Telnet Enables you to store metrics and access properties on TELNET_MESSAGE events.
Turn Enables you to store metrics and access properties on FLOW_TURN events.
UDP Enables you to access properties and retrieve metrics from UDP events and on FLOW_TICK and FLOW_TURN events.
WebSocket Enables you to access properties on WEBSOCKET_OPEN, WEBSOCKET_CLOSE, and WEBSOCKET_MESSAGE events.

AAA

The AAA (Authentication, Authorization, and Accounting) class enables you to store metrics and access properties on AAA_REQUEST or AAA_RESPONSE events.

Events

AAA_REQUEST
Runs when the ExtraHop system finishes processing an AAA request .
AAA_RESPONSE
Runs on every AAA response processed by the device.

Methods

commitRecord(): void
Commits a record object to the ExtraHop Explore appliance on either an AAA_REQUEST or AAA_RESPONSE event.

The event determines which properties are committed to the record object. To view the default properties committed on each event, see the record property below.

For built-in records, each unique record is committed only once, even if the commitRecord() method is called multiple times for the same unique record.

Properties

authenticator: String
The value of the authenticator field (RADIUS only).
avps:Array
avpLength: Number
The size of the AVP, expressed in bytes. This value includes the AVP header data, as well as the value.
id: Number
The numeric ID of the attribute represented as an integer.
isGrouped: Boolean
The value is true if this is a grouped AVP (Diameter only).
name: String
The name for the given AVP.
vendor: String
The vendor name for vendor AVPs (Diameter only).
value: String | Array | Number
For single AVPs, a string or numeric value. For grouped AVPs (Diameter only), an array of objects.
isDiameter: Boolean
The value is true if the request or response is Diameter.
isError: Boolean
The value is true if the response is an error. To retrieve the error details in Diameter, check AAA.statusCode. To retrieve the error details in RADIUS, check the AVP with code 18 (Reply-Message).

Access only on AAA_RESPONSE events or an error will occur.

isRadius: Boolean
The value is true if the request or response is RADIUS.
isRspAborted: Boolean
The value is true if the AAA_RESPONSE event is aborted.

Access only on AAA_RESPONSE events or an error will occur.

method: Number
The method that corresponds to the command code in either RADIUS or Diameter.

The following table contains valid Diameter command codes:

Command name Abbr. Code
AA-Request AAR 265
AA-Answer AAA 265
Diameter-EAP-Request DER 268
Diameter-EAP-Answer DEA 268
Abort-Session-Request ASR 274
Abort-Session-Answer ASA 274
Accounting-Request ACR 271
Credit-Control-Request CCR 272
Credit-Control-Answer CCA 272
Capabilities-Exchange-Request CER 257
Capabilities-Exchange-Answer CEA 257
Device-Watchdog-Request DWR 280
Device-Watchdog-Answer DWA 280
Disconnect-Peer-Request DPR 282
Disconnect-Peer-Answer DPA 282
Re-Auth-Request RAR 258
Re-Auth-Answer RAA 258
Session-Termination-Request STR 275
Session-Termination-Answer STA 275
User-Authorization-Request UAR 300
User-Authorization-Answer UAA 300
Server-Assignment-Request SAR 301
Server-Assignment-Answer SAA 301
Location-Info-Request LIR 302
Location-Info-Answer LIA 302
Multimedia-Auth-Request MAR 303
Multimedia-Auth-Answer MAA 303
Registration-Termination-Request RTR 304
Registration-Termination-Answer RTA 304
Push-Profile-Request PPR 305
Push-Profile-Answer PPA 305
User-Data-Request UDR 306
User-Data-Answer UDA 306
Profile-Update-Request PUR 307
Profile-Update-Answer PUA 307
Subscribe-Notifications-Request SNR 308
Subscribe-Notifications-Answer SNA 308
Push-Notification-Request PNR 309
Push-Notification-Answer PNA 309
Bootstrapping-Info-Request BIR 310
Bootstrapping-Info-Answer BIA 310
Message-Process-Request MPR 311
Message-Process-Answer MPA 311
Update-Location-Request ULR 316
Update-Location-Answer ULA 316
Authentication-Information-Request AIR 318
Authentication-Information-Answer AIA 318
Notify-Request NR 323
Notify-Answer NA 323

The following table contains valid RADIUS command codes:

Command name Code
Access-Request 1
Access-Accept 2
Access-Reject 3
Accounting-Request 4
Accounting-Response 5
Access-Challenge 11
Status-Server (experimental) 12
Status-Client (experimental) 13
Reserved 255
processingTime: Number
The server processing time, expressed in milliseconds. The value is NaN if the timing is invalid.

Access only on AAA_RESPONSE events or an error will occur.

record: Object
The record object committed to the ExtraHop Explore appliance through a call to AAA.commitRecord() on either an AAA_REQUEST or AAA_RESPONSE event.

The event on which the method was called determines which default properties the record object contains as displayed in the following table:

AAA_Request AAA_Response
authenticator authenticator
clientZeroWnd clientZeroWnd
method isError
reqBytes isRspAborted
reqL2Bytes method
reqPkts processingTime
reqRTO roundTripTime
serverZeroWnd rspBytes
txId rspL2Bytes
  rspPkts
  rspRTO
  statusCode
  serverZeroWnd
  txId
reqBytes: Number
The number of application-level request bytes.
reqL2Bytes: Number
The number of request L2 bytes.
reqPkts: Number
The number of request packets.
reqRTO: Number
The number of request retransmission timeouts (RTOs).

Access only on AAA_REQUEST events or an error will occur.

reqZeroWnd: Number
The number of zero windows in the request.
roundTripTime: Number
The median round trip time (RTT), expressed in milliseconds. The value is NaN if there are no RTT samples.
rspBytes: Number
The number of application-level response bytes.
rspL2Bytes: Number
The number of response L2 bytes.
rspPkts: Number
The number of response packets.
rspRTO: Number
The number of response retransmission timeouts (RTOs).

Access only on AAA_RESPONSE events or an error will occur.

rspZeroWnd: Number
The number of zero windows in the response.
statusCode: String
A string representation of the AVP identifier 268 (Result-Code).

Access only on AAA_RESPONSE events or an error will occur.

txId: Number
A value that corresponds to the hop-by-hop identifier in Diameter and msg-id in RADIUS.

ActiveMQ

The ActiveMQ class enables you to store metrics and access properties on ACTIVEMQ_MESSAGE events. ActiveMQ is an implementation of the Java Messaging Service (JMS).

Events

ACTIVEMQ_MESSAGE
Runs on every JMS message processed by the device.

Methods

commitRecord(): void
Commits a record object to the ExtraHop Explore appliance on an ACTIVEMQ_MESSAGE event.

To view the default properties committed to the record object, see the record property below.

For built-in records, each unique record is committed only once, even if the commitRecord() method is called multiple times for the same unique record.

Properties

correlationId: String
The JMSCorrelationID field of the message.
expiration: Number
The JMSExpiration field of the message.
msg: Buffer
The message body. For TEXT_MESSAGE format messages, this returns the body of the message as a UTF-8 string. For all other message formats, this returns the raw bytes.
msgFormat: String
The message format. Possible values are:
  • BYTES_MESSAGE
  • MAP_MESSAGE
  • MESSAGE
  • OBJECT_MESSAGE
  • STREAM_MESSAGE
  • TEXT_MESSAGE
  • BLOG_MESSAGE
msgId: String
The JMSMessageID field of the message.
persistent: Boolean
The value is true if the JMSDeliveryMode is PERSISTENT.
priority: Number
The JMSPriority field of the message.
  • 0 is the lowest priority.
  • 9 is the highest priority.
  • 0-4 are gradations of normal priority.
  • 5-9 are gradations of expedited priority.
properties: Object
Zero or more properties attached to the message. The keys are arbitrary strings and the values may be booleans, numbers, or strings.
queue: String
The JMSDestination field of the message.
receiverBytes: Number
The number of application-level bytes from the receiver.
receiverIsBroker: Boolean
The value is true if the flow-level receiver of the message is a broker.
receiverL2Bytes: Number
The number of L2 bytes from the receiver.
receiverPkts: Number
The number of packets from the receiver.
receiverRTO: Number
The number of RTOs from the receiver.
receiverZeroWnd: Number
The number of zero windows sent by the receiver.
record: Object
The record object that was committed to the ExtraHop Explore appliance through a call to ActiveMQ.commitRecord() on an ACTIVEMQ_MESSAGE event.

The record object contains the following default properties:

  • correlationId
  • expiration
  • msgFormat
  • msgId
  • persistent
  • priority
  • queue
  • receiverBytes
  • receiverIsBroker
  • receiverL2Bytes
  • receiverPkts
  • receiverRTO
  • receiverZeroWnd
  • redeliveryCount
  • replyTo
  • roundTripTime
  • senderBytes
  • senderIsBroker
  • senderL2Bytes
  • senderPkts
  • senderRTO
  • senderZeroWnd
  • timeStamp
  • totalMsgLength
redeliveryCount: Number
The number of redeliveries.
replyTo: String
The JMSReplyTo field of the message, converted to a string.
roundTripTime: Number
The median round trip time (RTT), expressed in milliseconds. The value is NaN if there are no RTT samples.
senderBytes: Number
The number of application-level bytes from the sender.
senderIsBroker: Boolean
The value is true if the flow-level sender of the message is a broker.
senderL2Bytes: Number
The number of L2 bytes from the sender.
senderPkts: Number
The number of packets from the sender.
senderRTO: Number
The number of RTOs from the sender.
senderZeroWnd: Number
The number of zero windows sent by the sender.
timeStamp: Number
The time when the message was handed off to a provider to be sent, expressed in GMT. This is the JMSTimestamp field of the message.
totalMsgLength: Number
The length of the message, expressed in bytes.

AJP

Apache JServ Protocol (AJP) proxies inbound requests from a web server to an application server and is often applied to load-balanced environments where one or more front-end web servers feed requests into one or more application servers. The AJP class enables you to store metrics and access properties on AJP_REQUEST and AJP_RESPONSE events.

Events

AJP_REQUEST
Runs after the web server sends an AJP Forward Request message to a servlet container, and then transfers any subsequent request body.
AJP_RESPONSE
Runs after a servlet container sends an AJP End Response message to signal that the servlet container has finished processing an AJP Forward Request and has sent back the requested information.

Methods

commitRecord(): Void
Commits a record object to the ExtraHop Explore appliance on an AJP_RESPONSE event. Record commits on AJP_REQUEST events are not supported.

To view the default properties committed to the record object, see the record property below.

For built-in records, each unique record is committed only once, even if the commitRecord() method is called multiple times for the same unique record.

findHeaders(name: String): Array
Accesses AJP header values and returns an array of header objects (with name and value properties) where the names match the prefix of the specified string. Accesses request headers on AJP_REQUEST events and response headers on AJP_RESPONSE requests.

Properties

attributes: Object
An array of optional AJP attributes sent with the request, such as remote_user, auth_type, query_string, jvm_route, ssl_cert, ssl_cipher, and ssl_session.

Access only on AJP_REQUEST events or an error will occur.

fwdReqClientAddr: IPAddress
The IPAddress of the HTTP client that made the original request to the server. The value is null if the available information cannot be parsed to an IP address.
fwdReqHost: String
The HTTP host specified by the HTTP client that made the original request to the server.
fwdReqIsEncrypted: Boolean
The value is true if SSL encryption was applied by the HTTP client that made the original request to the server.
fwdReqServerName: String

The name of the server to which the HTTP client made the original request.

fwdReqServerPort: Number
The TCP port on the server to which the HTTP client made the original request.
headers: Object
When accessed on AJP_REQUEST events, an array of header names and values sent with the request.

When accessed on AJP_RESPONSE events, an array of headers conveyed in the AJP Send Headers message by the server to the end user browser.

method: String
The HTTP method of the request, such as POST or GET, from the server to the servlet container.
processingTime: Number
The time between the last byte of the request received and the first byte of the response payload sent, expressed in milliseconds. The value is NaN on malformed and aborted responses or if the timing is invalid.

Access only on AJP_RESPONSE events or an error will occur.

protocol: String
The protocol of the request from the server to the servlet container. Not set for other message types.
record: Object
The record object that was committed to the ExtraHop Explore appliance through a call to AJP.commitRecord() on an AJP_RESPONSE event.

The record object contains the following default properties:

  • fwdReqClientAddr
  • fwdReqHost
  • fwdReqIsEncrypted
  • fwdReqServerName
  • fwdReqServerPort
  • method
  • processingTime
  • protocol
  • reqSize
  • rspSize
  • statusCode
  • uri

Access only on AJP_RESPONSE events or an error will occur.

reqBytes: Number

The number of L4 request bytes.

Access only on AJP_RESPONSE events or an error will occur.
reqL2Bytes: Number
The number of L2 request bytes.
reqPkts: Number
The number of request packets.
reqRTO: Number
The number of request transmission timeouts (RTOs).
reqSize: Number
The size of the request payload, expressed in bytes. The size does not include headers.
rspBytes: Number
The number of L4 response bytes.

Access only on AJP_RESPONSE events or an error will occur.

rspL2Bytes: Number
The number of L2 response bytes.

Access only on AJP_RESPONSE events or an error will occur.

rspPkts: Number
The number of response packets.

Access only on AJP_RESPONSE events or an error will occur.

rspRTO: Number
The number of response transmission timeouts (RTOs).

Access only on AJP_RESPONSE events or an error will occur.

rspSize: Number
The size of the response payload, expressed in bytes. The size does not include headers.

Access only on AJP_RESPONSE events or an error will occur.

statusCode: Number
The HTTP status code returned by the servlet container for responses to AJP Forward Request messages.

Access only on AJP_RESPONSE events or an error will occur.

uri: String
The URI for the request from the server to the servlet container. Not set for non-AJP message types.

CIFS

The CIFS class enables you to store metrics and access properties on CIFS_REQUEST and CIFS_RESPONSE events.

Events

CIFS_REQUEST
Runs on every CIFS request processed by the device.
CIFS_RESPONSE
Runs on every CIFS response processed by the device.

Methods

commitRecord(): void
Commits a record object to the ExtraHop Explore appliance on a CIFS_RESPONSE event. Record commits on CIFS_REQUEST events are not supported.

To view the default properties committed to the record object, see the record property below.

For built-in records, each unique record is committed only once, even if the commitRecord() method is called multiple times for the same unique record.

Properties

Important:Access time is the time it takes for a CIFS server to receive a requested block. There is no access time for operations that do not access actual block data within a file. Processing time is the time it takes for a CIFS server to respond to the operation requested by the client, such as a metadata retrieval request.

There are no access times for SMB2_CREATE commands, which create a file that is referenced in the response by an SMB2_FILEID command. The referenced file blocks are then read from or written to the NAS-storage device. These file read and write operations are calculated as access times.

accessTime: Number
The amount of time taken by the server to access a file on disk, expressed in milliseconds. For CIFS, this is the time from the first READ command in a CIFS flow until the first byte of the response payload. The value is NaN if the measurement or timing is invalid.

Access only on CIFS_RESPONSE events or an error will occur.

encryptedBytes: Number
The number of encrypted bytes in the request or response.
error: String
The detailed error message recorded by the ExtraHop system.

Access only on CIFS_RESPONSE events or an error will occur.

isCommandCreate: Boolean
The value is true if the message contains an SMB file creation command.
isCommandDelete: Boolean
The value is true if the message contains an SMB DELETE command.
isCommandFileInfo: Boolean
The value is true if the message contains an SMB file info command.
isCommandLock: Boolean
The value is true if the message contains an SMB locking command.
isCommandRead: Boolean
The value is true if the message contains an SMB READ command.
isCommandRename: Boolean
The value is true if the message contains an SMB RENAME command.
isCommandWrite: Boolean
The value is true if the message contains an SMB WRITE command.
method: String
The CIFS method. Correlates to the methods listed under the CIFS metric in the ExtraHop Web UI.
msgID: Number
The SMB transaction identifier.
payload: Buffer
The Buffer object containing the payload bytes starting from the READ or WRITE command in the CIFS message.

The buffer contains the N first bytes of the payload, where N is the number of payload bytes specified by the Bytes to Buffer field when the trigger was configured through the ExtraHop WebUI. The default number of bytes is 2048. For more information, see Advanced trigger options.

For larger volumes of payload bytes, the payload might be spread across a series of READ or WRITE commands so that no single trigger event contains the entire requested payload. You can reassemble the payload into a single, consolidated buffer through the Flow.store and payloadOffset properties.

payloadOffset: Number
The file offset, expressed in bytes, within the resource property. The payload property is obtained from the resource property at the offset.
processingTime: Number
The server processing time, expressed in milliseconds. The value is NaN on malformed and aborted responses or if the timing is invalid.

Access only on CIFS_RESPONSE events or an error will occur.

record: Object
The record object committed to the ExtraHop Explore appliance through a call to CIFS.commitRecord on a CIFS_RESPONSE event.

The record object contains the following default properties:

  • accessTime
  • clientZeroWnd
  • error
  • isCommandCreate
  • isCommandDelete
  • isCommandFileInfo
  • isCommandLock
  • isCommandRead
  • isCommandRename
  • isCommandWrite
  • method
  • processingTime
  • reqSize
  • reqXfer
  • resource
  • rspBytes
  • rspXfer
  • serverZeroWnd
  • share
  • statusCode
  • user
  • warning

Access only on CIFS_RESPONSE events or an error will occur.

reqBytes: Number
The number of L4 request bytes.

Access only on CIFS_RESPONSE events or an error will occur.

reqL2Bytes: Number
The number of L2 request bytes.

Access only on CIFS_RESPONSE events or an error will occur.

reqPkts: Number
The number of request packets.

Access only on CIFS_RESPONSE events or an error will occur.

reqRTO: Number
The number of request retransmission timeouts (RTOs).

Access only on CIFS_RESPONSE events or an error will occur.

reqSize: Number
The size of the request payload, expressed in bytes.
reqTransferTime: Number
The request transfer time, expressed in milliseconds. If the request is contained in a single packet, the transfer time is zero. If the request spans multiple packets, the value is the amount of time between detection of the first CIFS request packet and detection of the last packet by the ExtraHop system. A high value might indicate a large CIFS request or a network delay. The value is NaN if there is no valid measurement, or if the timing is invalid.

Access only on CIFS_REQUEST events or an error will occur.

reqVersion: String
The version of SMB running on the request.
reqZeroWnd: Number
The number of zero windows in the request.
resource: String
The share, path, and filename, concatenated together.
roundTripTime: Number
The median round trip time (RTT), expressed in milliseconds. The value is NaN if there are no RTT samples.

Access only on CIFS_RESPONSE events or an error will occur.

rspBytes: Number
The number of L4 response bytes.

Access only on CIFS_RESPONSE events or an error will occur.

rspL2Bytes: Number
The number of L2 response bytes.

Access only on CIFS_RESPONSE events or an error will occur.

rspPkts: Number
The number of response packets.

Access only on CIFS_RESPONSE events or an error will occur.

rspRTO: Number
The number of response retransmission timeouts (RTOs).

Access only on CIFS_RESPONSE events or an error will occur.

rspSize: Number
The size of the response payload, expressed in bytes.

Access only on CIFS_RESPONSE events or an error will occur.

rspTransferTime: Number
The response transfer time, expressed in milliseconds. If the response is contained in a single packet, the transfer time is zero. If the response spans multiple packets, the value is the amount of time between detection of the first CIFS response packet and detection of the last packet by the ExtraHop system. A high value might indicate a large CIFS response or a network delay. The value is NaN if there is no valid measurement, or if the timing is invalid.

Access only on CIFS_RESPONSE events or an error will occur.

rspVersion: String
The version of SMB running on the response.

Access only on CIFS_RESPONSE events or an error will occur.

rspZeroWnd: Number
The number of zero windows in the response.
share: String
The name of the share the user is connected to.
statusCode: Number
The numeric status code of the response (SMB2 only).

Access only on CIFS_RESPONSE events or an error will occur.

user: String
The username, if available. In some cases, such as when the login event was not visible or the access was anonymous, the username is not available.
warning: String
The detailed warning message recorded by the ExtraHop system.

Access only on CIFS_RESPONSE events or an error will occur.

DB

The DB, or database, class enables you to store metrics and access properties on DB_REQUEST and DB_RESPONSE events.

Events

DB_REQUEST
Runs on every database request processed by the device.
DB_RESPONSE
Runs on every database response processed by the device.

Method

commitRecord(): void
Commits a record object to the ExtraHop Explore appliance on a DB_RESPONSE event. Record commits on DB_REQUEST events are not supported.

To view the default properties committed to the record object, see the record property below.

For built-in records, each unique record is committed only once, even if the commitRecord() method is called multiple times for the same unique record.

Properties

appName: String
The client application name, which is extracted only for MS SQL connections.
correlationId: Number
The correlation ID for DB2 applications. The value is null for non-DB2 applications.
database: String
The database instance. In some cases, such as when login events are encrypted, the database name is not available.
error: String
The detailed error messages recorded by the ExtraHop system in string format. If there are multiple errors in one response, the errors are concatenated into one string.

Access only on DB_RESPONSE events or an error will occur.

errors: Array of strings
The detailed error messages recorded by the ExtraHop system in array format. If there is only a single error in the response, the error is returned as an array containing one string.

Access only on DB_RESPONSE events or an error will occur.

isReqAborted: Boolean
The value is true if the connection is closed before the DB request is complete.
isRspAborted: Boolean
The value is true if the connection is closed before the DB response is complete.

Access only on DB_RESPONSE events or an error will occur.

method: String
The database method that correlates to the methods listed under the Database metric in the ExtraHop Web UI.
params: Array
An array of remote procedure call (RPC) parameters that are only available for Microsoft SQL, PostgreSQL, and DB2 databases.

The array contains each of the following parameters:

name: String
The optional name of the supplied RPC parameter.
value: String | Number
A text, integer, or time and date field. If the value is not a text, integer, or time and date field, the value is converted into HEX/ASCII form.

The value of the params property is the same when accessed on either the DB_REQUEST or the DB_RESPONSE event.

procedure: String
The stored procedure name. Correlates to the procedures listed under the Database methods in the ExtraHop Web UI.
processingTime: Number
The server processing time, expressed in milliseconds (equivalent to rspTimeToFirstByte - reqTimeToLastByte). The value is NaN on malformed and aborted responses or if the timing is invalid.

Access only on DB_RESPONSE events or an error will occur.

record: Object
The record object committed to the ExtraHop Explore appliance through a call to DB.commitRecord on a DB_RESPONSE event.

The record object contains the following default properties:

  • appName
  • clientZeroWnd
  • correlationId
  • database
  • error
  • isReqAborted
  • isRspAborted
  • method
  • procedure
  • reqSize
  • reqTimeToLastByte
  • rspSize
  • rspTimeToFirstByte
  • rspTimeToLastByte
  • processingTime
  • serverZeroWnd
  • statement
  • table
  • user

Access only on DB_RESPONSE events or an error will occur.

reqBytes: Number
The number of L4 request bytes.

Access only on DB_REQUEST events or an error will occur.

reqL2Bytes: Number
The number of L2 request bytes.

Access only on DB_REQUEST events or an error will occur.

reqPkts: Number
The number of request packets.

Access only on DB_REQUEST events or an error will occur.

reqRTO: Number
The number of request retransmission timeouts (RTOs).

Access only on DB_REQUEST events or an error will occur.

reqSize: Number
The size of the request payload, expressed in bytes
reqTimeToLastByte: Number
The time from the first byte of the request until the last byte of the request, expressed in milliseconds. Returns NaN on malformed and aborted requests or if the timing is invalid.
reqZeroWnd: Number
The number of zero windows in the request.
roundTripTime: Number
The median round trip time (RTT), expressed in milliseconds. The value is NaN if there are no RTT samples.

Access only on DB_RESPONSE events or an error will occur.

rspBytes: Number
The number of L4 response bytes.

Access only on DB_RESPONSE events or an error will occur.

rspL2Bytes: Number
The number of L2 response bytes.

Access only on DB_RESPONSE events or an error will occur.

rspPkts: Number
The number of response packets.

Access only on DB_RESPONSE events or an error will occur.

rspRTO: Number
The number of response retransmission timeouts (RTOs).

Access only on DB_RESPONSE events or an error will occur.

rspSize: Number
The size of the response payload, expressed in bytes

Access only on DB_RESPONSE events or an error will occur.

rspTimeToFirstByte: Number
The time from the first byte of the request until the first byte of the response, expressed in milliseconds. The value is NaN on malformed and aborted responses or if the timing is invalid.

Access only on DB_RESPONSE events or an error will occur.

rspTimeToLastByte: Number
The time from the first byte of the request until the last byte of the response, expressed in milliseconds. The value is NaN on malformed and aborted responses or if the timing is invalid.

Access only on DB_RESPONSE events or an error will occur.

rspZeroWnd: Number
The number of zero windows in the response.
serverVersion: String
The MS SQL server version.
statement: String
The full SQL statement, which might not be available for all database methods.
table: String
The name of the database table specified in the current statement. The following databases are supported:
  • Sybase
  • Sybase IQ
  • MySQL
  • PostgreSQL
  • IBM Informix
  • MS SQL TDS
  • Oracle TNS
  • DB2

Returns an empty field if there is no table name in the request.

user: String
The username, if available. In some cases, such as when login events are encrypted, the username is unavailable.

DHCP

The DHCP class enables you to store metrics and access properties on DHCP_REQUEST and DHCP_ RESPONSE events.

Events

DHCP_REQUEST
Runs on every DHCP request processed by the device.
DHCP_RESPONSE
Runs on every DHCP response processed by the device.

Methods

commitRecord(): void
Commits a record object to the ExtraHop Explore appliance on either aDHCP_REQUEST or DHCP_RESPONSE event.

The event determines which properties are committed to the record object. To view the default properties committed on each event, see the record property below.

For built-in records, each unique record is committed only once, even if the commitRecord() method is called multiple times for the same unique record.

getOption(optionCode: Number): Object
Accepts a DHCP option code integer as input and returns an object containing the following fields:
code: Number
The DHCP option code.
name: String
The DHCP option name.
payload: Number | String
The type of payload returned will be whatever the type is for that specific option such as an IP address, an array of IP addresses, or a buffer object.

Returns null if the specified option code is not present in the message.

Properties

clientReqDelay: Number
The time elapsed before the client attempts to acquire or renew a DHCP lease, expressed in seconds.

Access only on DHCP_REQUEST events or an error will occur.

error: String
The error message associated with option code 56. The value is null if there is no error.

Access only on DHCP_RESPONSE events or an error will occur.

gwAddr: IPAddress
The IP address used by routers to relay request and response messages.
htype: Number
The hardware type code.
msgType: String
The DHCP message type. Supported message types are:
  • DHCPDISCOVER
  • DHCPOFFER
  • DHCPREQUEST
  • DHCPDECLINE
  • DHCPACK
  • DHCPNAK
  • DHCPRELEASE
  • DHCPINFORM
  • DHCPFORCERENEW
  • DHCPLEASEQUERY
  • DHCPLEASEUNASSIGNED
  • DHCPLEASEUNKNOWN
  • DHCPLEASEACTIVE
  • DHCPBULKLEASEQUERY
  • DHCPLEASEQUERYDONE
offeredAddr: IPAddress
The IP address the DHCP server is offering or assigning to the client.

Access only on DHCP_RESPONSE events or an error will occur.

options: Array of Objects
An array of objects with each object containing the following fields:
code: Number
The DHCP option code.
name: String
The DHCP option name.
payload: Number | String
The type of payload returned will be whatever the type is for that specific option such as an IP address, an array of IP addresses, or a buffer object. IP addresses will be parsed into an array but if the number of bytes is not divisible by 4, it will instead be returned as a buffer.
processingTime: Number
The process time, expressed in milliseconds. The value is NaN on malformed and aborted responses or if the timing is invalid.

Access only on DHCP_RESPONSE events or an error will occur.

record: Object
The record object committed to the ExtraHop Explore appliance through a call to DHCP.commitRecord on either a DHCP_REQUEST or DHCP_RESPONSE event.

The event on which the method was called determines which default properties the record object contains as displayed in the following table:

DHCP_REQUEST DHCP_RESPONSE
clientReqDelay msgType
gwAddr error
htype gwAddr
msgType htype
reqBytes offeredAddr
reqL2Bytes processingTime
reqPkts rspBytes
txId rspL2Bytes
rspPkts
txId
reqBytes: Number
The number of request bytes.

Access only on DHCP_RESPONSE events or an error will occur.

reqL2Bytes: Number
The number of request L2 bytes.

Access only on DHCP_RESPONSE events or an error will occur.

reqPkts: Number
The number of request packets.

Access only on DHCP_RESPONSE events or an error will occur.

rspBytes: Number
The number of L4 response bytes.

Access only on DHCP_RESPONSE events or an error will occur.

rspL2Bytes: Number
The number of L2 response bytes.

Access only on DHCP_RESPONSE events or an error will occur.

rspPkts: Number
The number of response packets.

Access only on DHCP_RESPONSE events or an error will occur.

txId: Number
The transaction ID.

DICOM

The DICOM (Digital Imaging and Communications in Medicine) class enables you to store metrics and access properties on DICOM_REQUEST and DICOM_ RESPONSE events.

Events

DICOM_REQUEST
Runs on every DICOM request processed by the device.
DICOM_RESPONSE
Runs on every DICOM response processed by the device.

Methods

commitRecord(): void
Commits a record object to the ExtraHop Explore appliance on a DICOM_REQUEST or DICOM_RESPONSE event.

The event determines which properties are committed to the record object. To view the default properties committed on each event, see the record property below.

For built-in records, each unique record is committed only once, even if the commitRecord() method is called multiple times for the same unique record.

findElement(groupTag: Number, elementTag: Number): Buffer
Returns a buffer that contains the DICOM data element specified by the passed group and element tag numbers.

The data element is represented by a unique ordered pair of integers that represent the group tag and element tag numbers. For example, the ordered pair "0008, 0008" represents the "image type" element. A Registry of DICOM Data Elements and defined tags is available at dicom.nema.org.

groupTag: Number
The first number in the unique ordered pair of integers that represent a specific data element.
elementTag: Number
The second number in the unique ordered pair or integers that represent a specific data element.

Properties

calledAETitle: String
The application entity (AE) title of the destination device or program.
callingAETitle: String
The application entity (AE) title of the source device or program.
elements: Array
An array of presentation data values (PDV) command elements and data elements that comprise a DICOM message.
error: String
The detailed error message recorded by the ExtraHop system.
isReqAborted: Boolean
Returns The value is true if the connection is closed before the DICOM request is complete.

Access only on DICOM_REQUEST events or an error will occur.

isRspAborted: Boolean
The value is true if the connection is closed before the DICOM response is complete.

Access only on DICOM_RESPONSE events or an error will occur.

isSubOperation: Boolean
The value is true if the timing metric on an L7 protocol message is not available because the primary request or response is not complete.
methods: Array of Strings
An array of command fields in the message. Each command field specifies a DIMSE operation name, such as N-CREATE-RSP.
processingTime: Number
The server processing time, expressed in milliseconds. The value is NaN on malformed and aborted responses or if the timing is invalid.

Access only on DICOM_RESPONSE events or an error will occur.

record: Object
The record object committed to the ExtraHop Explore appliance through a call to DICOM.commitRecord on either a DICOM_REQUEST or DICOM_RESPONSE event.

The event on which the method was called determines which default properties the record object contains as displayed in the following table:

DICOM_REQUEST DICOM_RESPONSE
calledAETitle calledAETitle
callingAETitle callingAETitle
clientZeroWnd clientZeroWnd
error error
isReqAborted isRspAborted
isSubOperation isSubOperation
method method
reqPDU processingTime
reqSize rspPDU
reqTransferTime rspSize
serverZeroWnd rspTransferTime
version serverZeroWnd
  version
reqBytes: Number
The number of application-level request bytes.

Access only on DICOM_REQUEST events or an error will occur.

reqL2Bytes: Number
The number of L2 request bytes.
reqPDU: String
The Protocol Data Unit (PDU), or message format, of the request.
reqPkts: Number
The number of request packets.
reqRTO: Number
The number of request retransmission timeouts (RTOs).
reqSize: Number
The size of the request, expressed in bytes.

Access only on DICOM_REQUEST events or an error will occur.

reqTransferTime: Number
The request transfer time, expressed in milliseconds.

Access only on DICOM_REQUEST events or an error will occur.

reqZeroWnd: Number
The number of zero windows in the request.
roundTripTime: Number
The median round trip time (RTT), expressed in milliseconds. The value is NaN if there are no RTT samples.

Access only on DICOM_RESPONSE events or an error will occur.

rspBytes: Number
The number of application-level response bytes.

Access only on DICOM_RESPONSE events or an error will occur.

rspL2Bytes: Number
The number of L2 response bytes.
rspPDU: String
The Protocol Data Unit (PDU), or message format, of the response.

Access only on DICOM_RESPONSE events or an error will occur.

rspPkts: Number
The number of response packets.
rspRTO: Number
The number of response retransmission timeouts (RTOs).
rspSize: Number
The size of the response, expressed in bytes.

Access only on DICOM_RESPONSE events or an error will occur.

rspTransferTime: Number
The response transfer time, expressed in milliseconds.

Access only on DICOM_RESPONSE events or an error will occur.

rspZeroWnd: Number
The number of zero windows in the response.
version: Number
The DICOM version number.

DNS

The DNS class enables you to store metrics and access properties on DNS_REQUEST and DNS_RESPONSE events.

Events

DNS_REQUEST
Runs on every DNS request processed by the device.
DNS_RESPONSE
Runs on every DNS response processed by the device.

Methods

answersInclude(term: String | IPAddress): Boolean
Returns true if the specified term is present in a DNS response. For string terms, the method checks both the name and data record in the answer section of the response. For IPAddress terms, the method checks only the data record in the answer section.

Can be called only on DNS_RESPONSE events.

commitRecord(): void
Commits a record object to the ExtraHop Explore appliance on a DNS_REQUEST or DNS_RESPONSE event.

The event determines which properties are committed to the record object. To view the default properties committed on each event, see the record property below.

For built-in records, each unique record is committed only once, even if the commitRecord() method is called multiple times for the same unique record.

Properties

answers: Array
An array of objects that correspond to answer resource records.

Access only on DNS_RESPONSE events or an error will occur.

The objects contain the following properties:

data: String
The value of data depends on the type. The value is null for unsupported record types. Supported record types include:
  • A
  • AAAA
  • NS
  • PTR
  • CNAME
  • MX
  • SRV
  • SOA
  • TXT
name: String
The record name.
ttl: Number
The time-to-live value.
type: String
The DNS record type.
typeNum: Number
The numeric representation of the DNS record type.
error: String
The name of the DNS error code, in accordance with IANA DNS parameters.

Returns OTHER for error codes that are unrecognized by the system; however, errorNum specifies the numeric code value.

Access only on DNS_RESPONSE events or an error will occur.

errorNum: Number
The numeric representation of the DNS error code in accordance with IANA DNS parameters.

Access only on DNS_RESPONSE events or an error will occur.

isAuthenticData: Boolean
The value is true if the response was validated through DNSSEC.

Access only on DNS_RESPONSE events or an error will occur.

isAuthoritative: Boolean
The value is true if the authoritative answer is set in the response.

Access only on DNS_RESPONSE events or an error will occur.

isCheckingDisabled: Boolean
The value is true if a response should be returned even though the request could not be authenticated.

Access only on DNS_REQUEST events or an error will occur.

isRecursionAvailable: Boolean
The value is true if the name server supports recursive queries.

Access only on DNS_RESPONSE events or an error will occur.

isRecursionDesired: Boolean
The value is true if the name server should perform the query recursively.

Access only on DNS_REQUEST events or an error will occur.

isReqTimeout: Boolean
The value is true if the request timed out.

Access only on DNS_REQUEST events or an error will occur.

isRspTruncated: Boolean
The value is true if the response is truncated.

Access only on DNS_RESPONSE events or an error will occur.

opcode: String
The name of the DNS operation code in accordance with IANA DNS parameters. The following codes are recognized by the ExtraHop system:
OpCode Name
0 Query
1 IQuery (Inverse Query - Obsolete)
2 Status
3 Unassigned
4 Notify
5 Update
6-15 Unassigned

Returns OTHER for codes that are unrecognized by the system; however, the opcodeNum property specifies the numeric code value.

opcodeNum: Number
The numeric representation of the DNS operation code in accordance with IANA DNS parameters.
processingTime: Number
The server processing time, expressed in bytes. The value is NaN on malformed and aborted responses or if the timing is invalid.

Access only on DNS_RESPONSE events or an error will occur.

qname: String
The hostname queried.
qtype: String
The name of the DNS request record type in accordance with IANA DNS parameters.

Returns OTHER for types that are unrecognized by the system; however, the qtypeNum property specifies the numeric type value.

qtypeNum: Number
The numeric representation of the DNS request record type in accordance with IANA DNS parameters.
record: Object
The record object committed to the ExtraHop Explore appliance through a call to DNS.commitRecord() on either a DNS_REQUEST or DNS_RESPONSE event.

The event on which the method was called determines which default properties the record object contains as displayed in the following table:

DNS_REQUEST DNS_RESPONSE
clientZeroWnd answers
isCheckingDisabled clientZeroWnd
isRecursionDesired error
isReqTimeout isAuthoritative
opcode isCheckingDisabled
qname isRecursionAvailable
qtype isRspTruncated
reqBytes opcode
reqL2Bytes processingTime
reqPkts qname
serverZeroWnd qtype
rspBytes
rspL2Bytes
rspPkts
  serverZeroWnd
reqBytes: Number
The number of application-level request bytes.

Access only on DNS_REQUEST events or an error will occur.

reqL2Bytes: Number
The number of request L2 bytes.

Access only on DNS_REQUEST events or an error will occur.

reqPkts: Number
The number of request packets.

Access only on DNS_REQUEST events or an error will occur.

rspBytes: Number
The number of response bytes.

Access only on DNS_RESPONSE events or an error will occur.

rspL2Bytes: Number
The number of response L2 bytes.

Access only on DNS_RESPONSE events or an error will occur.

rspPkts: Number
The number of application-level response bytes.

Access only on DNS_RESPONSE events or an error will occur.

FIX

The FIX class enables you to store metrics and access properties on FIX_REQUEST and FIX_RESPONSE events.

Events

FIX_REQUEST
Runs on every FIX request processed by the device.
FIX_RESPONSE
Runs on every FIX response processed by the device.
Note:FIX_RESPONSE is matched with request based on order ID. There is no one-to-one correlation between request and response. There could be requests without a response and sometimes data is pushed to the client. That limits request data availability on response event, however the session table could be used to solve any complex scenarios like submission order id, etc.

Method

commitRecord(): void
Commits a record object to the ExtraHop Explore appliance on either a FIX_REQUEST or FIX_RESPONSE event.

The event determines which properties are committed to the record object. To view the default properties committed for each event see the record property below.

For built-in records, each unique record is committed only once, even if the commitRecord() method is called multiple times for the same unique record.

Properties

fields: Array
A list of FIX fields. Since they are text-based, the key-value protocol fields are exposed as an array of objects with name and value properties containing strings. For example:
8=FIX.4.2<SOH>9=233<SOH>35=G<SOH>34=206657...

translates to:

{"BeginString": "FIX.4.2", "BodyLength": "233", "MsgType": "G", "MsgSeqNum":
"206657"}

Key string representation is translated, if possible. With extensions, a numeric representation is used. For example, it is not possible to determine 9178=0 (as seen in actual captures). The key is instead translated to "9178". Fields are extracted after message length and version fields are extracted all the way to the checksum (last field). The checksum is not extracted.

For another example, the trigger debug(JSON.stringify(FIX.fields)); shows the following fields:

[ {"name":"MsgType","value":"0"},
{"name":"MsgSeqNum","value":"2"},
{"name":"SenderCompID","value":"AA"},
{"name":"SendingTime","value":"20140904-03:49:58.600"},
{"name":"TargetCompID","value":"GG"}
]

To debug and print all FIX fields, enable debugging on the trigger and use the following code:

var fields = '';
for (var i = 0; i < FIX.fields.length; i++) {
fields += '"' + FIX.fields[i].name + '" : "' + FIX.fields[i].value +
'"\n';
} debug(fields);

The following output prints to the trigger's Runtime Log:

"MsgType" : "5"
"MsgSeqNum" : "3"
"SenderCompID" : "GRAPE"
"SendingTime" : "20140905-00:10:23.814"
"TargetCompID" : "APPLE"
msgType: String
The value of the MessageCompID key.
record: Object
The record object committed to the ExtraHop Explore appliance through a call to FIX.commitRecord on either an FIX_REQUEST or FIX_RESPONSE event.

The event on which the method was called determines which default properties the record object contains as displayed in the following table:

FIX_REQUEST FIX_RESPONSE
clientZeroWnd clientZeroWnd
msgType msgType
reqBytes rspBytes
reqL2Bytes rspL2Bytes
reqPkts rspPkts
reqRTO rspRTO
sender sender
serverZeroWnd serverZeroWnd
target target
version version
reqBytes: Number
The number of application-level request bytes.
reqL2Bytes: Number
The number of request L2 bytes.
reqPkts: Number
The number of request packets.
reqRTO: Number
The number of request RTOs.
reqZeroWnd: Number
The number of zero windows in the request.
rspBytes: Number
The number of application-level response bytes.
rspL2Bytes: Number
The number of response L2 bytes.
rspPkts: Number
The number of response packets.
rspRTO: Number
The number of response RTOs.
rspZeroWnd: Number
The number of zero windows in the response.
sender: String
The value of the SenderCompID key.
target: String
The value of the TargetCompID key.
version: String
The protocol version.

FTP

The FTP class enables you to store metrics and access properties on FTP_REQUEST and FTP_RESPONSE events.

Events

FTP_REQUEST
Runs on every FTP request processed by the device.
FTP_RESPONSE
Runs on every FTP response processed by the device.

Method

commitRecord(): void
Commits a record object to the ExtraHop Explore appliance on an FTP_RESPONSE event. Record commits on FTP_REQUEST events are not supported.

To view the default properties committed to the record object, see the record property below.

For built-in records, each unique record is committed only once, even if the commitRecord() method is called multiple times for the same unique record.

Properties

args: String
The arguments to the command.

Access only on FTP_RESPONSE events or an error will occur.

cwd: String
In the case of a user at /, when the client sends "CWD subdir":
  • The value is / when method == "CWD".
  • The value is /subdir for subsequent commands (rather than CWD becoming the changed to directory as part of the CWD response trigger).

Includes "..." at the beginning of the path in the event of a resync or the path is truncated.

Includes "..." at the end of the path if the path is too long. Path truncates at 4096 characters.

Access only on FTP_RESPONSE events or an error will occur.

error: string
The detailed error message recorded by the ExtraHop system.

Access only on FTP_RESPONSE events or an error will occur.

isReqAborted: Boolean
The value is true the connection is closed before the FTP request was complete.
isRspAborted: Boolean
The value is true if the connection is closed before the FTP response was complete.

Access only on FTP_RESPONSE events or an error will occur.

method: String
The FTP method.
path: String
The path for FTP commands. Includes "..." at the beginning of the path in the event of a resync or the path is truncated. Includes "..." at the end of the path if the path is too long. Path truncates at 4096 characters.

Access only on FTP_RESPONSE events or an error will occur.

processingTime: Number
The server processing time, expressed in milliseconds (equivalent to rspTimeToFirstPayload - reqTimeToLastByte). The value is NaN on malformed and aborted responses or if the timing is invalid.

Access only on FTP_RESPONSE events or an error will occur.

record: Object
The record object committed to the ExtraHop Explore appliance through a call to FTP.commitRecord() on an FTP_RESPONSE event.

The record object contains the following default properties:

  • args
  • clientZeroWnd
  • cwd
  • error
  • isReqAborted
  • isRspAborted
  • method
  • path
  • processingTime
  • reqBytes
  • reqL2Bytes
  • reqPkts
  • reqRTO
  • roundTripTime
  • rspBytes
  • rspL2Bytes
  • rspPkts
  • rspRTO
  • serverZeroWnd
  • statusCode
  • transferBytes
  • user

Access the record object only on FTP_RESPONSE events or an error will occur.

reqBytes: Number
The number of L4 request bytes.

Access only on FTP_RESPONSE events or an error will occur.

reqL2Bytes: Number
The number of L2 request bytes.

Access only on FTP_RESPONSE events or an error will occur.

reqPkts: Number
The number of request packets.

Access only on FTP_RESPONSE events or an error will occur.

reqRTO: Number
The number of request RTOs.

Access only on FTP_RESPONSE events or an error will occur.

reqZeroWnd: Number
The number of zero windows in the request.
roundTripTime: Number
The median round trip time (RTT), expressed in milliseconds. The value is NaN if there are no RTT samples.

Access only on FTP_RESPONSE events or an error will occur.

rspBytes: Number
The number of L4 response bytes.

Access only on FTP_RESPONSE events or an error will occur.

rspL2Bytes: Number
The number of L2 response bytes.

Access only on FTP_RESPONSE events or an error will occur.

rspPkts: Number
The number of response packets.

Access only on FTP_RESPONSE events or an error will occur.

rspRTO: Number
The number of response RTOs.

Access only on FTP_RESPONSE events or an error will occur.

rspZeroWnd: Number
The number of zero windows in the response.
statusCode: Number
The FTP status code of the response.

Access only on FTP_RESPONSE events or an error will occur.

The following codes are valid:

Code Description
110 Restart marker replay.
120 Service ready in nnn minutes.
125 Data connection already open; transfer starting.
150 File status okay; about to open data connection.
202 Command not implemented, superfluous at this site.
211 System status, or system help reply.
212 Directory status.
213 File status.
214 Help message.
215 NAME system type.
220 Service ready for new user.
221 Service closing control connection.
225 Data connection open; no transfer in progress.
226 Closing data connection. Requested file action successful.
227 Entering Passive Mode.
228 Entering Long Passive Mode.
229 Entering Extended Passive Mode.
230 User logged in, proceed. Logged out if appropriate.
231 User logged out; service terminated.
232 Logout command noted, will complete when transfer done
250 Requested file action okay, completed.
257 "PATHNAME" created.
331 User name okay, need password.
332 Need account for login.
350 Requested file action pending further information.
421 Service not available, closing control connection.
425 Can't open data connection.
426 Connection closed; transfer aborted.
430 Invalid username or password.
434 Requested host unavailable.
450 Requested file action not taken.
451 Requested action aborted. Local error in processing.
452 Requested action not taken.
501 Syntax error in parameters or arguments.
502 Command not implemented.
503 Bad sequence of commands.
504 Command not implemented for that parameter.
530 Not logged in.
532 Need account for storing files.
550 Requested action not taken. File unavailable.
551 Requested action aborted. Page type unknown.
552 Requested file action aborted. Exceeded storage allocation.
553 Requested action not taken. File name not allowed.
631 Integrity protected reply.
632 Confidentiality and integrity protected reply.
633 Confidentiality protected reply.
10054 Connection reset by peer.
10060 Cannot connect to remote server.
10061 Cannot connect to remote server. The connection is active refused.
10066 Directory not empty.
10068 Too many users, server is full.
transferBytes: Number
The number of bytes transferred over the data channel during an FTP_RESPONSE event.

Access only on FTP_RESPONSE events or an error will occur.

user: String
The user name, if available. In some cases, such as when login events are encrypted, the user name is not available.

HL7

The HL7 class enables you to store metrics and access properties on HL7_REQUEST and HL7_RESPONSE events.

Events

HL7_REQUEST
Runs on every HL7 request processed by the device.
HL7_RESPONSE
Runs on every HL7 response processed by the device.

Methods

commitRecord(): void
Commits a record object to the ExtraHop Explore appliance on an HL7_RESPONSE event. Record commits on HL7_REQUEST events are not supported.

To view the default properties committed to the record object, see the record property below.

For built-in records, each unique record is committed only once, even if the commitRecord() method is called multiple times for the same unique record.

Properties

ackCode: String
The two character acknowledgment code.

Access only on HL7_RESPONSE events or an error will occur.

ackId: String
The identifier for the message being acknowledged.

Access only on HL7_RESPONSE events or an error will occur.

msgId: String
The unique identifier for this message.
msgType: String
The entire message type field, including the msgId subfield.
processingTime: Number
The server processing time, expressed in milliseconds. The value is NaN on malformed and aborted responses or if the timing is invalid.

Access only on HL7_RESPONSE events or an error will occur.

record: Object
The record object committed to the ExtraHop Explore appliance through a call to HL7.commitRecord() on an HL7_RESPONSE event.

The record object contains the following default properties:

  • ackCode
  • ackId
  • clientZeroWnd
  • msgId
  • msgType
  • roundTripTime
  • processingTime
  • serverZeroWnd
  • version

Access the record object only on HL7_RESPONSE events or an error will occur.

roundTripTime: Number
The median round trip time (RTT), expressed in milliseconds. The value is NaN if there are no RTT samples.

Access only on HL7_RESPONSE events or an error will occur.

segments: Array
An array of objects where each object is of type (name: XYZ, fields: array of strings).
subfieldDelimiter: String
Supports non-standard field delimiters.
version: String
The version advertised in the MSH segment.
Note:The amount of buffered data is limited by the following capture option: ("message_length_max": number)

HTTP

The HTTP class enables you to store metrics and access properties on HTTP_REQUEST and HTTP_RESPONSE events.

Events

HTTP_REQUEST
Runs on every HTTP request processed by the device.
HTTP_RESPONSE
Runs on every HTTP response processed by the device.

Additional payload options are available when you create a trigger that runs on either of these events. See Advanced trigger options for more information.

Methods

commitRecord(): void
Commits a record object to the ExtraHop Explore appliance on an HTTP_RESPONSE event. Record commits on HTTP_REQUEST events are not supported.

To view the default properties committed to the record object, see the record property below.

For built-in records, each unique record is committed only once, even if the commitRecord() method is called multiple times for the same unique record.

findHeaders(name: String): Array
Allows access to HTTP header values and returns an array of header objects (with name and value properties) where the names match the prefix of the string value. See Example: Access HTTP header attributes for more information.
parseQuery(String): Object
Accepts a query string and returns an object with names and values corresponding to those in the query string as shown in the following example:
var query = HTTP.parseQuery(HTTP.query);
debug("user id: " + query.userid);

Properties

age: Number
For HTTP_REQUEST events, the time from the first byte of the request until the last seen byte of the request. For HTTP_RESPONSE events, the time from the first byte of the request until the last seen byte of the response. The time is expressed in milliseconds. Specifies a valid value on malformed and aborted requests. The value is NaN on expired requests and responses, or if the timing is invalid.
contentType: String
The value of the content-type HTTP header.
cookies: Array
An array of objects that represents cookies and contains properties such as "domain" and "expires." The properties correspond to the attributes of each cookie as shown in the following example:
var cookies = HTTP.cookies,
    cookie,
    i;
for (i = 0; i < cookies.length; i++) {
    cookie = cookies[i];
    if (cookie.domain) {
        debug("domain: " + cookie.domain);
    }
}
headers: Object
An array-like object that allows access to HTTP header names and values. Header information is available through one of the following properties:
length: Number
The number of headers.
string property:
The name of the header, accessible in a dictionary-like fashion, as shown in the following example:
var headers = HTTP.headers;
    session = headers["X-Session-Id"];
    accept = headers.accept;
numeric property:
Corresponds to the order in which the headers appear on the wire. The returned object has a name and a value property. Numeric properties are useful for iterating over all the headers and disambiguating headers with duplicate names as shown in the following example:
var headers = HTTP.headers;
for (i = 0; i < headers.length; i++) {
    hdr = headers[i];
    debug("headers[" + i + "].name: " + hdr.name);
    debug("headers[" + i + "].value: " + hdr.value);
}
Note:Saving HTTP.headers to the Flow store does not save all of the individual header values. It is a best practice to save the individual header values to the Flow store. Refer to the Flow class section for details.
headersRaw: String
The unmodified block of HTTP headers, expressed as a string.
host: String
The value in the HTTP host header.
isDesync: Boolean
The value is true if the protocol parser became desynchronized due to missing packets.
isEncrypted: Boolean
Specifies The value is true if the transaction is over secure HTTP.
isPipelined: Boolean
The value is true if the transaction is pipelined.
isReqAborted: Boolean
The value is true if the connection is closed before the HTTP request was complete.
isRspAborted: Boolean
The value is true if the connection is closed before the HTTP response was complete.

Access only on HTTP_RESPONSE events or an error will occur.

isRspChunked: Boolean
The value is true if the response is chunked.

Access only on HTTP_RESPONSE events or an error will occur.

isRspCompressed: Boolean
The value is true if the response is compressed.
isServerPush: Boolean
The value is true if the transaction is the result of a server push.
method: String
The HTTP method of the transaction such as POST and GET.
origin: IPAddress | String
The value in the X-Forwarded-For or the true-client-ip header.
path: String
The path portion of the URI: /path/.
payload: Buffer
The Buffer object containing the raw payload bytes of the event transaction. If the payload was compressed, the decompressed content is returned.

The buffer contains the N first bytes of the payload, where N is the number of payload bytes specified by the Bytes to Buffer field when the trigger was configured through the ExtraHop WebUI. The default number of bytes is 2048. For more information, see Advanced trigger options.

The following script is an example of HTTP payload analysis:

/* Extract the user name based on a pattern "user=*&" from payload of a
login URI that has "auth/login" as a URI substring. */

if (HTTP.payload && /auth\/login/i.test(HTTP.uri)) {
    var user = /user=(.*?)\&/i.exec(HTTP.payload);
    if (user !== null) {
        debug("user: " + user[1]);
    }
}
Note:If two HTTP payload buffering triggers are assigned to the same device, the higher value is used and the value of HTTP.payload will be the same for both triggers.
processingTime: Number
The server processing time, expressed in milliseconds (equivalent to rspTimeToFirstPayload - reqTimeToLastByte). The value is NaN on malformed and aborted responses or if the timing is invalid.

Access only on HTTP_RESPONSE events or an error will occur.

query: String
The query string portion of the URI: query=string. This typically follows the URL and is separated from it by a question mark. Multiple query strings are separated by an ampersand (&) or semicolon (;) delimiter.
record: Object
The record object that was committed to the ExtraHop Explore appliance through a call to HTTP.commitRecord() on an HTTP_RESPONSE event.

The record object contains the following default properties:

  • clientZeroWnd
  • contentType
  • host
  • isPipelined
  • isReqAborted
  • isRspAborted
  • isRspChunked
  • isRspCompressed
  • method
  • origin
  • query
  • referer
  • reqBytes
  • reqL2Bytes
  • reqPkts
  • reqRTO
  • reqSize
  • reqTimeToLastByte
  • roundTripTime
  • rspBytes
  • rspL2Bytes
  • rspPkts
  • rspRTO
  • rspSize
  • rspTimeToFirstHeader
  • rspTimeToFirstPayload
  • rspTimeToLastByte
  • rspVersion
  • serverZeroWnd
  • statusCode
  • thinkTime
  • title
  • processingTime
  • uri
  • userAgent

Access the record object only on HTTP_RESPONSE events or an error will occur.

referer: String
The value in the HTTP referrer header.
reqBytes: Number
The number of L4 request bytes.

Access only on HTTP_RESPONSE events or an error will occur.

reqL2Bytes: Number
The number of request L2 bytes.

Access only on HTTP_RESPONSE events or an error will occur.

reqPkts: Number
The number of request packets.

Access only on HTTP_RESPONSE events or an error will occur.

reqRTO: Number
The number of request retransmission timeouts (RTOs).

Access only on HTTP_RESPONSE events or an error will occur.

reqSize: Number
The size of the request payload, expressed in bytes. The size does not include headers.
reqTimeToLastByte: Number
The time from the first byte of the request until the last byte of the request, expressed in milliseconds. The value is NaN on expired requests and responses, or if the timing is invalid.
reqZeroWnd: Number
The number of zero windows in the request.
roundTripTime: Number
The median TCP round trip time (RTT), expressed in milliseconds. The value is NaN if there are no RTT samples.

Access only on HTTP_RESPONSE events or an error will occur.

rspBytes: Number
The number of response L4 bytes.

Access only on HTTP_RESPONSE events or an error will occur.

rspL2Bytes: Number
The number of response L2 bytes.

Access only on HTTP_RESPONSE events or an error will occur.

rspPkts: Number
The number of response packets.

Access only on HTTP_RESPONSE events or an error will occur.

rspRTO: Number
The number of response retransmission timeouts (RTOs).

Access only on HTTP_RESPONSE events or an error will occur.

rspSize: Number
The size of the response payload, expressed in bytes. The size does not include headers.

Access only on HTTP_RESPONSE events or an error will occur.

rspTimeToFirstHeader: Number
The time from the first byte of the request until the status line that precedes the response headers, expressed in milliseconds. The value is NaN on malformed and aborted responses, or if the timing is invalid.

Access only on HTTP_RESPONSE events or an error will occur.

rspTimeToFirstPayload: Number
The time from the first byte of the request until the first payload byte of the response, expressed in milliseconds. Returns zero value when the response does not contain payload. The value is NaN on malformed and aborted responses, or if the timing is invalid.

Access only on HTTP_RESPONSE events or an error will occur.

rspTimeToLastByte: Number
The time from the first byte of the request until the last byte of the response, expressed in milliseconds. The value is NaN on malformed and aborted responses, or if the timing is invalid.

Access only on HTTP_RESPONSE events or an error will occur.

rspVersion: String
The HTTP version of the response.

Access only on HTTP_RESPONSE events or an error will occur.

rspZeroWnd: Number
The number of zero windows in the response.
statusCode: Number
The HTTP status code of the response.

Access only on HTTP_RESPONSE events or an error will occur.

Note:Returns a status code of 0 if no valid HTTP_RESPONSE is received.
streamID: Number
The ID of the stream that transferred the resource. Because responses might be returned out of order, this property is required for HTTP/2 transactions to match requests with responses. The value is 1 for the HTTP/1.1 upgrade request and null for previous HTTP versions.
title: String
The value in the title element of the HTML content, if present.
thinkTime: Number
The time elapsed between the server having transferred the response to the client and the client transferring a new request to the server, expressed in milliseconds. The value is NaN if there is no valid measurement.
uri: String
The URI without a query string: f.q.d.n/path/.
userAgent: String
The value in the HTTP user-agent header.

IBMMQ

The IBMMQ class enables you to store metrics and access properties on IBMMQ_REQUEST and IBMMQ_ RESPONSE events.

Note:The IBMMQ protocol supports EBCDIC encoding.

Events

IBMMQ_REQUEST
Runs on every IBMMQ request processed by the device.
IBMMQ_RESPONSE
Runs on every IBMMQ response processed by the device.

Methods

commitRecord(): void
Commits a record object to the ExtraHop Explore appliance on either an IBMMQ_REQUEST or IBMMQ_RESPONSE event.

The event determines which properties are committed to the record object. To view the default properties committed for each event, see the record property below.

For built-in records, each unique record is committed only once, even if the commitRecord() method is called multiple times for the same unique record.

Properties

channel: String
The communication channel name.
correlationId: String
The IBMMQ correlation ID.
error:String
The error string that corresponds to the error code on the wire.
method:String
The wire protocol request or response method name.

The following ExtraHop method names differ from the Wireshark method names:

ExtraHop Wireshark
ASYNC_MSG_V7 ASYNC_MESSAGE
MQCLOSEv7 SOCKET_ACTION
MQGETv7 REQUEST_MSGS
MQGETv7_REPLY NOTIFICATION
msg: Buffer
A Buffer object containing MQPUT, MQPUT1, MQGET_REPLY, ASYNC_MSG_V7, and MESSAGE_DATA messages.

Queue messages that are greater than 32K might be broken into more than one segment. A trigger is run for each segment and only the first segment has a non-null message.

Buffer data can be converted to a printable string through the toString() function or formatted through unpack commands.

msgFormat: String
The message format.
msgId: String
The IBMMQ message ID.
pcfError: String
The error string that corresponds to the error code on the wire for the programmable command formats (PCF) channel.
pcfMethod: String
The wire protocol request or response method name for the programmable command formats (PCF) channel.
pcfWarning: String
The warning string that corresponds to the warning string on the wire for the programmable command formats (PCF) channel.
putAppName: String
The application name associated with the MQPUT message.
queue: String
The local queue name. The value is null if there is no MQOPEN, MQOPEN_REPLY, MQSP1(Open), or MQSP1_REPLY message.
queueMgr: String
The local queue manager. The value is null if there is no INITIAL_DATA message at the start of the connection.
record: Object
The record object that was committed to the ExtraHop Explore appliance through a call to IBMMQ.commitRecord() on either an IBMMQ_REQUEST or IBMMQ_RESPONSE event.

The event on which the method was called determines which default properties the record object contains as displayed in the following table:

IBMMQ_REQUEST IBMMQ_RESPONSE
channel channel
clientZeroWnd clientZeroWnd
correlationId correlationId
msgId error
method msgId
msgFormat method
msgSize msgFormat
queue msgSize
queueMgr queue
reqBytes queueMgr
reqL2Bytes resolvedQueue
reqPkts resolvedQueueMgr
reqRTO roundTripTime
resolvedQueue rspBytes
resolvedQueueMgr rspL2Bytes
serverZeroWnd rspPkts
rspRTO
serverZeroWnd
warning
reqBytes: Number
The number of application-level request bytes.
reqL2Bytes: Number
The number of L2 request bytes.
reqPkts: Number
The number of request packets.
reqRTO: Number
The number of request retransmission timeouts (RTOs).
reqZeroWnd: Number
The number of zero windows in the request.
resolvedQueue: String
The resolved queue name from MQGET_REPLY, MQPUT_REPLY, or MQPUT1_REPLY messages. If the queue is remote, the value is different than the value returned by IBMMQ.queue.
resolvedQueueMgr: String
The resolved queue manager from MQGET_REPLY, MQPUT_REPLY, or MQPUT1_REPLY. If the queue is remote, the value is different than the value returned by IBMMQ.queueMgr.
rfh: Array of Strings
An array of strings located in the optional rules and formatting header (RFH). If there is no RFH header or the header is empty, the array is empty.
roundTripTime: Number
The median round trip time (RTT), expressed in milliseconds. The value is NaN if there are no RTT samples.
rspBytes: Number
The number of application-level response bytes.
rspL2Bytes: Number
The number of L2 response bytes.
rspPkts: Number
The number of request packets.
rspRTO: Number
The number of response retransmission timeouts (RTOs).
rspZeroWnd: Number
The number of zero windows in the response.
totalMsgLength: Number
The total length of the message, expressed in bytes.
warning: String
The warning string that corresponds to the warning string on the wire.

ICA

The ICA class enables you to store metrics and access properties on ICA_OPEN, ICA_AUTH, ICA_TICK, and ICA_ CLOSE events.

Events

ICA_AUTH
Runs when the ICA authentication is complete.
ICA_CLOSE
Runs when the ICA session is closed.
ICA_OPEN
Runs immediately after the ICA application is initially loaded.
ICA_TICK
Runs periodically while the user interacts with the ICA application.

After the ICA_OPEN event has run at least once, the ICA_TICK event is run anytime latency is reported and returned by the clientLatency or networkLatency properties described below.

Methods

commitRecord(): void
Commits a record object to the ExtraHop Explore appliance on either an ICA_OPEN, ICA_TICK, or ICA_CLOSE event. Record commits on ICA_AUTH events are not supported.

The event determines which properties are committed to the record object. To view the default properties committed for each event, see the record property below.

For built-in records, each unique record is committed only once, even if the commitRecord() method is called multiple times for the same unique record.

Properties

application: String
The name of the application being launched.
authDomain: String
The Windows authentication domain to which the user belongs.
channels: Array
An array of objects containing information about virtual channels observed since the last ICA_TICK event.

Access only on ICA_TICKevents or an error will occur.

Each object contains the following properties:

name: String
The name of the virtual channel.
description: String
The friendly description of the channel name.
clientBytes: Number
The number of bytes sent by the client for that channel.
serverBytes: Number
The number of bytes sent by the server for the channel.
clientMachine: String
The name of the client machine. The name is displayed by the ICA client and is typically the hostname of the client machine.
clientBytes: Number
Upon an ICA_CLOSE event, the incremental number of application-level client bytes observed since the last ICA_TICK event. Does not specify the total number of bytes for the session.

Access only on ICA_CLOSE or ICA_TICK events or an error will occur.

clientCGPMsgCount: Number
The number of client CGP messages since the last ICA_TICK event.

Access only on ICA_TICK events or an error will occur.

clientLatency: Number
The latency of the client, expressed in milliseconds, as reported by the End User Experience Management (EUEM) beacon.

Client latency is reported when a packet from the client on the EUEM channel reports the result of a single ICA round trip measurement.

Access only on ICA_TICK events or an error will occur.

clientL2Bytes: Number
Upon an ICA_CLOSE event, the incremental number of L2 client bytes observed since the last ICA_TICK event. Does not specify the total number of bytes for the session.

Access only on ICA_CLOSE or ICA_TICK events or an error will occur.

clientMsgCount: Number
The number of client messages since the last ICA_TICK event.

Access only on ICA_TICK events or an error will occur.

clientPkts: Number
Upon an ICA_CLOSE event, the incremental number of client packets observed since the last ICA_TICK event. Does not specify the total number of packets for the session.

Access only on ICA_CLOSE or ICA_TICK events or an error will occur.

clientRTO: Number
Upon an ICA_CLOSE event, the incremental number of client retransmission timeouts (RTOs) observed since the last ICA_TICK event. Does not specify the total number of RTOs for the session.

Access only on ICA_CLOSE or ICA_TICK events or an error will occur.

clientZeroWnd: Number
The number of zero windows sent by the client.

Access only on ICA_CLOSE or ICA_TICK events or an error will occur.

clientType: String
The type of ICA client, which is the user-agent equivalent to ICA.
clipboardData: Buffer
A Buffer object containing raw data from the clipboard transfer.

The value is null if the ICA_TICK event did not result from a clipboard data transfer, or if the channel specified by the tickChannel property is not a clipboard channel.

The maximum number of bytes in the buffer is specified by the Clipboard Bytes to Buffer field when the trigger was configured through the ExtraHop Web UI. The default maximum object size is 1024 bytes. For more information, see the Advanced trigger options.

To determine the direction of the clipboard data transfer, access this property through Flow.sender, Flow.receiver, Flow.client, or Flow.server.

Access only on ICA_TICK events or an error will occur.

clipboardDataType: String
The type of data on the clipboard transfer. The following clipboard types are supported:
  • TEXT
  • BITMAP
  • METAFILEPICT
  • SYMLINK
  • DIF
  • TIFF
  • OEMTEXT
  • DIB
  • PALLETTE
  • PENDATA
  • RIFF
  • WAVE
  • UNICODETEXT
  • EHNMETAFILE
  • OWNERDISPLAY
  • DSPTEXT
  • DSPBITMAP
  • DSPMETAFILEPICT
  • DSPENHMETAFILE

The value is null if the ICA_TICK event did not result from a clipboard data transfer, or if the channel specified by the tickChannel property is not a clipboard channel.

Access only on ICA_TICK events or an error will occur.

frameCutDuration: Number
The frame cut duration, as reported by the EUEM beacon.

Access only on ICA_TICK events or an error will occur.

frameSendDuration: Number
The frame send duration, as reported by the EUEM beacon.

Access only on ICA_TICK events or an error will occur.

host: String
The host name of the Citrix server.
isAborted: Boolean
The value is true if the application fails to launch successfully.

Access only on ICA_CLOSE events or an error will occur.

isCleanShutdown: Boolean
The value is true if the application shuts down cleanly.

Access only on ICA_CLOSE events or an error will occur.

isClientDiskRead: Boolean
The value is true if a file was read from the client disk to the Citrix server. The value is null if the command is not a file operation, or if the channel specified by the tickChannel property is not a file channel.

Access only on ICA_TICK events or an error will occur.

isClientDiskWrite: Boolean
The value is true if a file was written from the Citrix server to the client disk. The value is null if the command is not a file operation, or if the channel specified by the tickChannel property is not a file channel.

Access only on ICA_TICK events or an error will occur.

isEncrypted: Boolean
The value is true if the application is encrypted with RC5 encryption.
isSharedSession: Boolean
The value is true if the application is launched over an existing connection.
launchParams: String
The string that represents the parameters.
loadTime: Number
The load time of the given application, expressed in milliseconds.
Note:The load time is recorded only for the initial application load. The ExtraHop system does not measure load time for applications launched over existing sessions and instead reports the initial load time on subsequent application loads. Choose ICA.isSharedSession to distinguish between initial and subsequent application loads.
loginTime: Number
The user login time, expressed in milliseconds.

Access only on ICA_OPEN, ICA_CLOSE, or ICA_TICK events or an error will occur.

Note:The login time is recorded only for the initial application load. The ExtraHop system does not measure login time for applications launched over existing sessions and instead reports the initial login time on subsequent application loads. Choose ICA.isSharedSession to distinguish between initial and subsequent application loads.
networkLatency: Number
The current latency advertised by the client, expressed in milliseconds.

Network latency is reported when a specific ICA packet from the client contains latency information.

Access only on ICA_TICK events or an error will occur.

payload: Buffer
The Buffer object containing the raw payload bytes of the file that was read or written on the event.

The buffer contains the N first bytes of the payload, where N is the number of payload bytes specified by the Bytes to Buffer field when the trigger was configured through the ExtraHop WebUI. The default number of bytes is 2048. For more information, see Advanced trigger options.

The value is null if the channel specified by the tickChannel property is not a file channel.

Access only on ICA_TICK events or an error will occur.

printerName: String
The name of the printer driver.

Access only on ICA_TICK events or an error will occur.

program: String
The name of the program, or application, that is being launched.
record: Object
The record object committed to the ExtraHop Explore appliance through a call to ICA.commitRecord() on either an ICA_OPEN, ICA_TICK, or ICA_CLOSE event.

The event on which the method was called determines which default properties the record object contains as displayed in the following table:

ICA_CLOSE ICA_OPEN ICA_TICK
authDomain authDomain authDomain
clientBytes clientMachine clientBytes
clientL2Bytes clientType clientCGPMsgCount
clientMachine clientZeroWnd clientL2Bytes
clientPkts host clientLatency
clientRTO isEncrypted clientMachine
clientType isSharedSession clientMsgCount
clientZeroWnd launchParams clientPkts
host loadTime clientRTO
isAborted loginTime clientType
isCleanShutdown program clientZeroWnd
isEncypted serverZeroWnd frameCutDuration
isSharedSession user frameSendDuration
launchParams   host
loadTime   isClientDiskRead
loginTime   isClientDiskWrite
program   isEncrypted
roundTripTime isSharedSession
serverBytes launchParams
serverL2Bytes loadTime
serverPkts loginTime
serverRTO networkLatency
serverZeroWnd   program
user resource
    roundTripTime
  serverBytes
  serverCGPMsgCount
  serverL2Bytes
    serverMsgCount
  serverPkts
  serverRTO
serverZeroWnd
tickChannel
    user

Access the record object only on ICA_OPEN, ICA_CLOSE, and ICA_TICK events or an error will occur.

resource: String
The path of the file that was read or written on the event, if known. The value is null if the channel specified by the tickChannel property is not a file channel.

Access only on ICA_TICK events or an error will occur.

resourceOffset: Number
The offset of the file that was read or written on the event, if known. The value is null if the channel specified by the tickChannel property is not a file channel.

Access only on ICA_TICK events or an error will occur.

roundTripTime: Number
The median round trip time (RTT), expressed in milliseconds. The value is NaN if there are no RTT samples.

Access only on ICA_CLOSE or ICA_TICK events or an error will occur.

serverBytes: Number
Upon an ICA_CLOSE event, the incremental number of application-level server bytes observed since the last ICA_TICK event. Does not specify the total number of bytes for the session.

Access only on ICA_CLOSE or ICA_TICK events or an error will occur.

serverCGPMsgCount: Number
The number of CGP server messages since the last ICA_TICK event.

Access only on ICA_TICK events or an error will occur.

serverL2Bytes: Number
Upon an ICA_CLOSE event, the incremental number of L2 server bytes observed since the last ICA_TICK event. Does not specify the total number of bytes for the session.

Access only on ICA_CLOSE or ICA_TICK events or an error will occur.

serverMsgCount: Number
The number of server messages since the last ICA_TICK event.

Access only on ICA_TICK events or an error will occur.

serverPkts: Number
Upon an ICA_CLOSE event, the incremental number of server packets observed since the last ICA_TICK event. Does not specify the total number of packets for the session.

Access only on ICA_CLOSE or ICA_TICK events or an error will occur.

serverRTO: Number
Upon an ICA_CLOSE event, the incremental number of server retransmission timeouts (RTOs) observed since the last ICA_TICK event. Does not specify the total number of RTOs for the session.

Access only on ICA_CLOSE or ICA_TICK events or an error will occur.

serverZeroWnd: Number
The number of zero windows sent by the server.

Access only on ICA_CLOSE or ICA_TICK events or an error will occur.

tickChannel: String
The name of the virtual channel that resulted in the current ICA_TICK event. The following channels are supported:
  • CTXCLI: clipboard
  • CTXCDM: file
  • CTXEUE: end user experience monitoring

Access only on ICA_TICK events or an error will occur.

user: String
The name of the user, if available.

ICMP

The ICMP class enables you to store metrics and access properties on ICMP_MESSAGE events.

Events

ICMP_MESSAGE
Runs on every ICMP message processed by the device.

Methods

commitRecord(): void
Commits a record object to the ExtraHop Explore appliance on an ICMP_MESSAGE event.

To view the default properties committed to the record object, see the record property below.

For built-in records, each unique record is committed only once, even if the commitRecord() method is called multiple times for the same unique record.

Properties

gwAddr: IPAddress
For a redirect message, returns the address of the gateway to which traffic for the network specified in the internet destination network field of the original datagram's data should be sent. Returns null for all other messages.
Message ICMPv4 Type ICMPv6 Type
Redirect Message 5 n/a
hopLimit: Number
The ICMP packet time to live or hop count.
isError: Boolean
The value is true for message types in the following table.
Message ICMPv4 Type ICMPv6 Type
Destination Unreachable 3 1
Redirect 5 n/a
Source Quench 4 n/a
Time Exceeded 11 3
Parameter Problem 12 4
Packet Too Big n/a 2
isQuery: Boolean
The value is true for message types in the following table.
Message ICMPv4 Type ICMPv6 Type
Echo Request 8 128
Information Request 15 n/a
Timestamp request 13 n/a
Address Mask Request 17 n/a
Router Discovery 10 151
Multicast Listener Query n/a 130
Router Solicitation (NDP) n/a 133
Neighbor Solicitation n/a 135
ICMP Node Information Query n/a 139
Inverse Neighbor Discovery Solicitation n/a 141
Home Agent Address Discovery Solicitation n/a 144
Mobile Prefix Solicitation n/a 146
Certification Path Solicitation n/a 148
isReply: Boolean
The value is true for message types in the following table.
Message ICMPv4 Type ICMPv6 Type
Echo Reply 0 129
Information Reply 16 n/a
Timestamp Reply 14 n/a
Address Mask Reply 18 n/a
Multicast Listener Done n/a 132
Multicast Listener Report n/a 131
Router Advertisement (NDP) n/a 134
Neighbor Advertisement n/a 136
ICMP Node Information Response n/a 140
Inverse Neighbor Discovery Advertisement n/a 142
Home Agent Address Discovery Reply Message n/a 145
Mobile Prefix Advertisement n/a 147
Certification Path Advertisement n/a 149
msg: Buffer
A buffer object containing up to message_length_max bytes of the ICMP message. The message_length_ max option is configured in the ICMP profile in the running config.

The following running config example changes the ICMP message_length_ max from its default of 4096 bytes to 1234 bytes:

"capture": {
    "app_proto": {
        "ICMP": {
            "message_length_max": 1234
         }
     }
}
msgCode: Number
The ICMP message code.
msgID: Number
The ICMP message identifier for Echo Request, Echo Reply, Timestamp Request, Timestamp Reply, Information Request, and Information Reply messages. The value is null for all other message types.

The following table displays type IDs for the ICMP messages:

Message ICMPv4 Type ICMPv6 Type
Echo Request 8 128
Echo Reply 0 129
Timestamp Request 13 n/a
Timestamp Reply 14 n/a
Information Request 15 n/a
Information Reply 16 n/a
msgLength: Number
The length of the ICMP message, expressed in bytes.
msgText: String
The descriptive text for the message (e.g., echo request or port unreachable).
msgType: Number
The ICMP message type.

The following table displays the ICMPv4 message types available:

Type Message
0 Echo Reply
1 and 2 Reserved
3 Destination Unreachable
4 Source Quench
5 Redirect Message
6 Alternate Host Address (deprecated)
7 Reserved
8 Echo Request
9 Router Advertisement
10 Router Solicitation
11 Time Exceeded
12 Parameter Problem: Bad IP header
13 Timestamp
14 Timestamp Reply
15 Information Request (deprecated)
16 Information Reply (deprecated)
17 Address Mask Request (deprecated)
18 Address Mask Reply (deprecated)
19 Reserved
20-29 Reserved
30 Traceroute (deprecated)
31 Datagram Conversion Error (deprecated)
32 Mobile Host Redirect (deprecated)
33 Where Are You (deprecated)
34 Here I Am (deprecated)
35 Mobile Registration Request (deprecated)
36 Mobile Registration Reply (deprecated)
37 Domain Name Request (deprecated)
38 Domain Name Reply (deprecated)
39 Simple Key-Management for Internet Protocol (deprecated)
40 Photuris (deprecated)
41 ICMP experimental
42-255 Reserved

The following table displays the ICMPv6 message types available:

Type Message
1 Destination Unreachable
2 Packet Too Big
3 Time Exceeded
4 Parameter Problem
100 Private Experimentation
101 Private Experimentation
127 Reserved for expansion of ICMPv6 error messages
128 Echo Request
129 Echo Reply
130 Multicast Listener Query
131 Multicast Listener Report
132 Multicast Listener Done
133 Router Solicitation
134 Router Advertisement
135 Neighbor Solicitation
136 Neighbor Advertisement
137 Redirect Message
138 Router Renumbering
139 ICMP Node Information Query
140 ICMP Node Information Response
141 Inverse Neighbor Discovery Solicitation Message
142 Inverse Neighbor Discovery Advertisement Message
143 Multicast Listener Discovery (MLDv2) reports
144 Home Agent Address Discovery Request Message
145 Home Agent Address Discovery Reply Message
146 Mobile Prefix Solicitation
147 Mobile Prefix Advertisement
148 Certification Path Solicitation
149 Certification Path Advertisement
151 Multicast Router Advertisement
152 Multicast Router Solicitation
153 Multicast Router Termination
155 RPL Control Message
200 Private Experimentation
201 Private Experimentation
255 Reserved for expansion of ICMPv6 informational messages
nextHopMTU: Number
An ICMPv4 Destination Unreachable or an ICMPv6 Packet Too Big message, the maximum transmission unit of the next-hop link. The value is null for all other messages.
Message ICMPv4 Type ICMPv6 Type
Destination Unreachable 3 n/a
Packet Too Big n/a 2
original: Object
An object containing the following elements from the IP datagram that caused the ICMP message to be sent:
ipproto: String
The IP protocol of the datagram, such as TCP, UDP, ICMP, or ICMPv6.
ipver: String
The IP version of the datagram, such as IPv4 or IPv6.
srcAddr: IPAddress
The IPAddress of the datagram sender.
srcPort: Number
The port number of the datagram sender.
dstAddr: IPAddress
The IPAddress of the datagram receiver.
dstPort: Number
The port number of the datagram receiver.

The value is null if the internet header and 64 bits of the Original Data datagram is not present in the message or if the IP protocol is not TCP or UDP.

Access only on ICMP_MESSAGE events or an error will occur.

pointer: Number
For a Parameter Problem message, the octet of the original datagram's header where the error was detected. The value is null for all other messages.
Message ICMPv4 Type ICMPv6 Type
Parameter Problem 12 4
record: Object
The record object committed to the ExtraHop Explore appliance through a call to ICMP.commitRecord() on an ICMP_MESSAGE event.

The record object contains the following default properties:

  • gwAddr
  • hopLimit
  • msgCode
  • msgId
  • msgLength
  • msgText
  • msgType
  • nextHopMTU
  • pointer
  • seqNum
  • version
seqNum: Number
The ICMP sequence number for Echo Request, Echo Reply, Timestamp Request, Timestamp Reply, Information Request, and Information Reply messages. The value is null for all other messages.
version: Number
The version of the ICMP message type, which can be ICMPv4 or ICMPv6.

Kerberos

The Kerberos class enables you to store metrics and access properties on KERBEROS_REQUEST and KERBEROS_ RESPONSE events.

Events

KERBEROS_REQUEST
Runs on every Kerberos AS-REQ and TGS-REQ message type processed by the device.
KERBEROS_RESPONSE
Runs on every Kerberos AS-REP and TGS-REP message type processed by the device.

Methods

commitRecord(): void
Commits a record object to the ExtraHop Explore appliance on either a KERBEROS_REQUEST or KERBEROS_RESPONSE event.

The event determines which properties are committed to the record object. To view the default properties committed for each event, see the record property below.

For built-in records, each unique record is committed only once, even if the commitRecord() method is called multiple times for the same unique record.

Properties

addresses: Array of Objects
The addresses from which the requested ticket is valid.

Access only on KERBEROS_REQUEST events or an error will occur.

cNames: Array of Strings
The name portions of the principal identifier.
cNameType: String
The type for the cNames field.
cRealm: String
The client realm.
error: String
The error returned.

Access only on KERBEROS_RESPONSE events or an error will occur.

eType: Array of Numbers
An array of the preferred encryption methods.

Access only on KERBEROS_REQUEST events or an error will occur.

from: String
In AS_REQ and TGS_REQ message types, the time when the requested ticket is to be postdated to.

Access only on KERBEROS_REQUEST events or an error will occur.

kdcOptions: Object
An object containing booleans for each option flag in AS_REQ and TGS_REQ messages.

Access only on KERBEROS_REQUEST events or an error will occur.

msgType: String
The message type. Possible values are:
  • AP_REP
  • AP_REQ
  • AS_REP
  • AS_REQAUTHENTICATOR
  • ENC_AS_REP_PART
  • ENC_KRB_CRED_PART
  • ENC_KRB_PRIV_PART
  • ENC_P_REP_PART
  • ENC_TGS_REP_PART
  • ENC_TICKET_PART
  • KRB_CRED
  • KRB_ERROR
  • KRB_PRIV
  • KRB_SAFE
  • TGS_REP
  • TGS_REQ
  • TICKET
paData: Array of Objects
The pre-authentication data.
processingTime: Number
The processing time, expressed in milliseconds.

Access only on KERBEROS_RESPONSE events or an error will occur.

realm: String
The server realm. In an AS_REQ message type, this is the client realm.
record: Object
The record object committed to the ExtraHop Explore appliance through a call to Kerberos.commitRecord() on either a KERBEROS_REQUEST or KERBEROS_RESPONSE event.

The event on which the method was called determines which default properties the record object contains as displayed in the following table:

KERBEROS_REQUEST KERBEROS_RESPONSE
cNames cNames
cNameType cNameType
cRealm cRealm
clientZeroWnd clientZeroWnd
eType error
from msgType
msgType processingTime
realm realm
reqBytes roundTripTime
reqL2Bytes rspBytes
reqPkts rspL2Bytes
reqRTO rspPkts
sNames rspRTO
sNameType sNames
serverZeroWnd sNameType
till serverZeroWnd
sNames: Array of Strings
The name portions of the server principal identifier
sNameType: String
The type for the sNames field.
ticket: Object
A newly generated ticket in RESPONSE or a ticket to authenticate the client to the server in an AP_REQ message.

Access only on KERBEROS_REQUEST events or an error will occur.

till: String
The expiration date requested by the client in a ticket request.

Access only on KERBEROS_REQUEST events or an error will occur.

LDAP

The LDAP class enables you to store metrics and access properties on LDAP_REQUEST and LDAP_RESPONSE events.

Events

LDAP_REQUEST
Runs on every LDAP request processed by the device.
LDAP_RESPONSE
Runs on every LDAP response processed by the device.

Methods

commitRecord(): void
Commits a record object to the ExtraHop Explore appliance on either an LDAP_REQUEST or LDAP_RESPONSE event.

The event determines which properties are committed to the record object. To view the default properties committed for each event, see the record property below.

For built-in records, each unique record is committed only once, even if the commitRecord() method is called multiple times for the same unique record.

Properties

bindDN: String
The bind DN of the LDAP request.

Access only on LDAP_REQUEST events or an error will occur.

dn: String
The LDAP distinguished name (DN). If no DN is set, <ROOT> will be returned instead.
error: String
The LDAP short error string as defined in the protocol (e.g., noSuchObject).

Access only on LDAP_RESPONSE events or an error will occur.

Result Code Result String
1 operationsError
2 protocolError
3 timeLimitExceeded
4 sizeLimitExceeded
7 authMethodNotSupported
8 strongerAuthRequired
11 adminLimitExceeded
12 unavailableCriticalExtension
13 confidentialityRequired
16 noSuchAttribute
17 undefinedAttributeType
18 inappropriateMatching
19 constraintViolation
20 attributeOrValueExists
21 invalidAttributeSyntax
32 NoSuchObject
33 aliasProblem
34 invalidDNSSyntax
36 aliasDeferencingProblem
48 inappropriateAuthentication
49 invalidCredentials
50 insufficientAccessRights
51 busy
52 unavailable
53 unwillingToPerform
54 loopDetect
64 namingViolation
65 objectClassViolation
66 notAllowedOnNonLeaf
67 notAllowedOnRDN
68 entryAlreadyExists
69 objectClassModsProhibited
71 affectsMultipleDSAs
80 other
errorDetail: String
The LDAP error detail, when available for that error type (e.g., protocolError : historical procotol version requested, use LDAPv3 instead).

Access only on LDAP_RESPONSE events or an error will occur.

method: String
The LDAP method.
msgSize: Number
The size of the LDAP message, expressed in bytes.
processingTime: Number
The server processing time, expressed in milliseconds. The value is NaN on malformed and aborted responses, if the timing is invalid, or if the timing is not available. Available for the following:
  • BindRequest
  • SearchRequest
  • ModifyRequest
  • AddRequest
  • DelRequest
  • ModifyDNRequest
  • CompareRequest
  • ExtendedRequest

Applies only to LDAP_RESPONSE events.

record: Object
The record object committed to the ExtraHop Explore appliance through a call to LDAP.commitRecord() on either an LDAP_REQUEST or LDAP_RESPONSE event.

The event on which the method was called determines which default properties the record object contains as displayed in the following table:

LDAP_REQUEST LDAP_RESPONSE
bindDN clientZeroWnd
clientZeroWnd dn
dn error
method errorDetail
msgSize method
reqBytes msgSize
reqL2Bytes processingTime
reqPkts roundTripTime
reqRTO rspBytes
saslMechanism rspL2Bytes
searchFilter rspPkts
searchScope rspRTO
serverZeroWnd saslMechanism
  serverZeroWnd
reqBytes: Number
The number of request bytes.
reqL2Bytes: Number
The number of request L2 bytes.
reqPkts: Number
The number of request packets.
reqRTO: Number
The number of request RTOs.
reqZeroWnd: Number
The number of zero windows in the request.
roundTripTime: Number
The median round trip time (RTT), expressed in milliseconds. The value is NaN if there are no RTT samples.
rspBytes: Number
The number of response bytes.
rspL2Bytes: Number
The number of response L2 bytes.
rspPkts: Number
The number of response packets.
rspRTO: Number
The number of response RTOs.
rspZeroWnd: Number
The number of zero windows in the response.
saslMechanism: String
The string that defines the SASL mechanism to identify and authenticate a user to a server.
searchAttributes: Array
The attributes to return from objects that match the filter criteria.

Access only on LDAP_REQUEST events or an error will occur.

searchFilter: String
The mechanism to allow certain entries in the subtree and exclude others.

Access only on LDAP_REQUEST events or an error will occur.

searchScope: String
The depth of a search within the search base.

Access only on LDAP_REQUEST events or an error will occur.

LLDP

The LLDP class enables you to access properties on LLDP_FRAME events.

Events

LLDP_FRAME
Runs on every LLDP frame processed by the device.

Properties

chassisId: Buffer
The chassis ID, obtained from the chassisId data field, or type-length-value (TLV).
chassisIdSubtype: Number
The chassis ID subtype, obtained from the chassisID TLV.
destination: String
The destination MAC address.
optTLVs: Array
An array containing the optional TLVs. Each TLV is an object with the following properties:
customSubtype: Number
The subtype of an organizationally specific TLV.
isCustom: Boolean
Returns true if the object is an organizationally specific TLV.
oui: Number
The organizationally unique identifier for organizationally specific TLVs.
type: Number
The type of TLV.
value: String
The value of the TLV.
portId: Buffer
The port ID, obtained from the portId TLV.
portIdSubtype: Number
The port ID subtype, obtained from the portId TLV.
source: Device
The device sending the LLDP frame.
ttl: Number
The time to live, expressed in seconds. This is the length of time during which the information in this frame is valid, starting with when the information is received.

Memcache

The Memcache class enables you to store metrics and access properties on MEMCACHE_REQUEST and MEMCACHE_RESPONSE events.

Events

MEMCACHE_REQUEST
Runs on every memcache request processed by the device.
MEMCACHE_RESPONSE
Runs on every memcache response processed by the device.

Methods

commitRecord(): void
Commits a record object to the ExtraHop Explore appliance on either a MEMCACHE_REQUEST or MEMCACHE_RESPONSE event.

The event determines which properties are committed to the record object. To view the default properties committed for each event, see the record property below.

For built-in records, each unique record is committed only once, even if the commitRecord() method is called multiple times for the same unique record.

Properties

accessTime: Number
The access time, expressed in milliseconds. Available only if the first key that was requested produced a hit.

Access only on MEMCACHE_RESPONSE events or an error will occur.

error: String
The detailed error message recorded by the ExtraHop system.

Access only on MEMCACHE_RESPONSE events or an error will occur.

hits: Array
An array of objects containing the Memcache key and key size.

Access only on MEMCACHE_RESPONSE events or an error will occur.

key: String | Null
The Memcache key for which this was a hit, if available.
size: Number
The size of the value returned for the key, expressed in bytes.
isBinaryProtocol: Boolean
The value is true if the request/response corresponds to the binary version of the memcache protocol.
isNoReply: Boolean
The value is true if the request has the "noreply" keyword and therefore should never receive a response (text protocol only).

Access only on MEMCACHE_REQUEST events or an error will occur.

isRspImplicit: Boolean
The value is true if the response was implied by a subsequent response from the server (binary protocol only).

Access only on MEMCACHE_RESPONSE events or an error will occur.

method: String
The Memcache method as recorded in Metrics section of the ExtraHop Web UI.
misses: Array
An array of objects containing the Memcache key.

Access only on MEMCACHE_RESPONSE events or an error will occur.

key: String | Null
The Memcache key for which this was a miss, if available.
record: Object
The record object committed to the ExtraHop Explore appliance through a call to Memcache.commitRecord() on either a MEMCACHE_REQUEST or MEMCACHE_RESPONSE event.

The event on which the method was called determines which default properties the record object contains as displayed in the following table:

MEMCACHE_REQUEST MEMCACHE_RESPONSE
clientZeroWnd accessTime
isBinaryProtocol clientZeroWnd
isNoReply error
method hits
reqBytes isBinaryProtocol
reqL2Bytes isRspImplicit
reqPkts method
reqRTO misses
reqSize roundTripTime
serverZeroWnd rspBytes
vbucket rspL2Bytes
rspPkts
rspRTO
serverZeroWnd
statusCode
vbucket
reqBytes: Number
The number of application-level request bytes.
reqKeys: Array
An array containing the Memcache key strings sent with the request.

The value of the reqKeys property is the same when accessed on either the MEMCACHE_REQUEST or the MEMCACHE_RESPONSE event.

reqL2Bytes: Number
The number of request L2 bytes.
reqPkts: Number
The number of request packets.
reqRTO: Number
The number of request RTOs.

Access only on MEMCACHE_REQUEST events or an error will occur.

reqSize: Number
The size of the request payload, expressed in bytes. The value is NaN for requests with no playload, such as GET and DELETE.
reqZeroWnd: Number
The number of zero windows in the request.
roundTripTime: Number
The median round trip time (RTT), expressed in milliseconds. The value is NaN if there are no RTT samples.
rspBytes: Number
The number of application-level response bytes.
rspL2Bytes: Number
The number of response L2 bytes.
rspPkts: Number
The number of response packets.
rspRTO: Number
The number of response RTOs.

Access only on MEMCACHE_RESPONSE events or an error will occur.

rspZeroWnd: Number
The number of zero windows in the response.
statusCode: String
The Memcache status code. For the binary protocol, the ExtraHop system metrics prepend the method to status codes other than NO_ERROR, but the statusCode property does not. Refer to the examples for code that matches the behavior of the ExtraHop system metrics.

Access only on MEMCACHE_RESPONSE events or an error will occur.

vbucket: Number
The Memcache vbucket, if available (binary protocol only).

MongoDB

The MongoDB class enables you to store metrics and access properties on MONGODB_REQUEST and MONGODB_ RESPONSE events.

Events

MONGODB_REQUEST
Runs on every MongoDB request processed by the device.
MONGODB_RESPONSE
Runs on every MongoDB response processed by the device.

Methods

commitRecord(): void
Commits a record object to the ExtraHop Explore appliance on either a MONGODB_REQUEST or MONGODB_RESPONSE event.

The event determines which properties are committed to the record object. To view the default properties committed for each event, see the record property below.

For built-in records, each unique record is committed only once, even if the commitRecord() method is called multiple times for the same unique record.

Properties

collection: String
The name of the database collection specified in the current request.
database: String
The MongoDB database instance. In some cases, such as when login events are encrypted, the database name is not available.
error: String
The detailed error message recorded by the ExtraHop system.

Access only on MONGODB_RESPONSE events or an error will occur.

isReqAborted: Boolean
The value is true if the connection is closed before the MongoDB request was complete.
isReqTruncated: Boolean
The value is true if the request document(s) size is greater than the maximum payload document size.
isRspAborted: Boolean
The value is true if the connection is closed before the MongoDB response was complete.

Access only on MONGODB_RESPONSE events or an error will occur.

method: String
The MongoDB database method (appears under Methods in the user interface).
opcode: String
The MongoDB operational code on the wire protocol, which might differ from the MongoDB method used.
processingTime: Number
The time to process the request, expressed in milliseconds (equivalent to rspTimeToFirstByte - reqTimeToLastByte). The value is NaN on malformed and aborted responses or if the timing is invalid.

Access only on MONGODB_RESPONSE events or an error will occur.

record: Object
The record object committed to the ExtraHop Explore appliance through a call to MongoDB.commitRecord() on either an MONGODB_REQUEST or MONGODB_RESPONSE event.

The event on which the method was called determines which default properties the record object contains as displayed in the following table:

MONGODB_REQUEST MONGODB_RESPONSE
clientZeroWnd clientZeroWnd
collection collection
database database
isReqAborted error
isReqTruncated isRspAborted
method method
opcode opcode
reqBytes processingTime
reqL2Bytes roundTripTime
reqPkts rspBytes
reqRTO rspL2Bytes
reqSize rspPkts
reqTimeToLastByte rspRTO
serverZeroWnd rspSize
user rspTimeToFirstByte
rspTimeToLastByte
serverZeroWnd
user
reqBytes: Number
The number of application-level request bytes.
reqL2Bytes: Number
The number of request L2 bytes.
reqPkts: Number
The number of request packets.
reqRTO: Number
The number of request RTOs.
reqSize: Number
The size of the request payload, expressed in bytes.
reqTimeToLastByte: Number
The time from the first byte of the request until the last byte of the request, expressed in milliseconds.
reqZeroWnd: Number
The number of zero windows in the request.
request: Array
An array of JS objects parsed from MongoDB request payload documents. Total document size is limited to 4K.

If BSON documents are truncated, isReqTruncated flag is set. Truncated values are represented as follows:

  • Primitive string values like code, code with scope, and binary data are partially extracted.
  • Objects and Arrays are partially extracted.
  • All other primitive values like Numbers, Dates, RegExp, etc., are substituted with null.

If no documents are included in the request, an empty array is returned.

The value of the request property is the same when accessed on either the MONGODB_REQUEST or the MONGODB_RESPONSE event.

roundTripTime: Number
The median round trip time (RTT), expressed in milliseconds. The value is NaN if there are no RTT samples.
rspBytes: Number
The number of application-level response bytes.
rspL2Bytes: Number
The number of response L2 bytes.
rspPkts: Number
The number of response packets.
rspRTO: Number
The number of response RTOs.
rspSize: Number
The size of the response payload, expressed in bytes.

Access only on MONGODB_RESPONSE events or an error will occur.

rspTimeToFirstByte: Number
The time from the first byte of the request until the first byte of the response, expressed in milliseconds. The value is NaN on malformed and aborted responses, or if the timing is invalid.

Access only on MONGODB_RESPONSE events or an error will occur.

rspTimeToLastByte: Number
The time from the first byte of the request until the last by of the response, expressed in milliseconds. The value is NaN on malformed and aborted responses, or if the timing is invalid.

Access only on MONGODB_RESPONSE events or an error will occur.

rspZeroWnd: Number
The number of zero windows in the response.
user: String
The user name, if available. In some cases, such as when login events are encrypted, the user name is not available.

MSMQ

The MSMQ class enables you to store metrics and access properties on MSMQ_MESSAGE events.

Events

MSMQ_MESSAGE
Runs on every MSMQ user message processed by the device.

Methods

commitRecord(): void
Commits a record object to the ExtraHop Explore appliance on an MSMQ_MESSAGE event.

To view the default properties committed to the record object, see the record property below.

For built-in records, each unique record is committed only once, even if the commitRecord() method is called multiple times for the same unique record.

Properties

adminQueue: String
The name of the administration queue of the message.
correlationId: Buffer
The application-generated correlation ID of the message.
dstQueueMgr: String
The destination message broker of the message.
isEncrypted: Boolean
The value is true if the payload is encrypted.
label: String
The label or description of the message.
msgClass: String
The message class of the message. The following values are valid:
  • MQMSG_CLASS_NORMAL
  • MQMSG_CLASS_ACK_REACH_QUEUE
  • MQMSG_CLASS_NACK_ACCESS_DENIED
  • MQMSG_CLASS_NACK_BAD_DST_Q
  • MQMSG_CLASS_NACK_BAD_ENCRYPTION
  • MQMSG_CLASS_NACK_BAD_SIGNATURE
  • MQMSG_CLASS_NACK_COULD_NOT_ENCRYPT
  • MQMSG_CLASS_NACK_HOP_COUNT_EXCEEDED
  • MQMSG_CLASS_NACK_NOT_TRANSACTIONAL_MSG
  • MQMSG_CLASS_NACK_NOT_TRANSACTIONAL_Q
  • MQMSG_CLASS_NACK_PURGED
  • MQMSG_CLASS_NACK_Q_EXCEEDED_QUOTA
  • MQMSG_CLASS_NACK_REACH_QUEUE_TIMEOUT
  • MQMSG_CLASS_NACK_SOURCE_COMPUTER_GUID_CHANGED
  • MQMSG_CLASS_NACK_UNSUPPORTED_CRYPTO_PROVIDER
  • MQMSG_CLASS_ACK_RECEIVE
  • MQMSG_CLASS_NACK_Q_DELETED
  • MQMSG_CLASS_NACK_Q_PURGED
  • MQMSG_CLASS_NACK_RECEIVE_TIMEOUT
  • MQMSG_CLASS_NACK_RECEIVE_TIMEOUT_AT_SENDER
  • MQMSG_CLASS_REPORT
msgId: Number
The MSMQ message id of the message.
payload: Buffer
The body of the MSMQ message.
priority: Number
The priority of the message. This can be a number between 0 and 7.
queue: String
The name of the destination queue of the message.
receiverBytes: Number
The number of L4 receiver bytes.
receiverL2Bytes: Number
The number of L2 receiver bytes.
receiverPkts: Number
The number of receiver packets.
receiverRTO: Number
The number of receiver RTOs.
receiverZeroWnd: Number
The number of zero windows sent by the receiver.
record: Object
The record object committed to the ExtraHop Explore appliance through a call to MSMQ.commitRecord() on an MSMQ_MESSAGE event.

The record object contains the following default properties:

  • adminQueue
  • dstQueueMgr
  • isEncrypted
  • label
  • msgClass
  • msgId
  • priority
  • queue
  • receiverBytes
  • receiverL2Bytes
  • receiverPkts
  • receiverRTO
  • receiverZeroWnd
  • responseQueue
  • roundTripTime
  • senderBytes
  • senderL2Bytes
  • senderPkts
  • senderRTO
  • serverZeroWnd
  • srcQueueMgr
responseQueue: String
The name of the response queue of the message.
roundTripTime: Number
The median round trip time (RTT), expressed in milliseconds. The value is NaN if there are no RTT samples.
senderBytes: Number
The number of sender L4 bytes.
senderL2Bytes: Number
The number of sender L2 Bytes.
senderPkts: Number
The number of sender packets.
senderRTO: Number
The number of sender RTOs.
senderZeroWnd: Number
The number of zero windows sent by the sender.
srcQueueMgr: String
The source message broker of the message.

NetFlow

The NetFlow class object enables you to store metrics and access properties on NETFLOW_RECORD events.

The ExtraHop Discover appliance can be licensed for the NetFlow module, which supports the following flow types:

  • NetFlow version 5 (Cisco)
  • NetFlow version 9 (Cisco)
  • IPFIX (open standard based on RFC 5101)

Events

NETFLOW_RECORD
Runs upon receipt of a flow record from a flow network.

Methods

commitRecord(): void
Commits a record object to the ExtraHop Explore appliance on a NETFLOW_RECORD event.
Note:The record is not committed to the Explore appliance if the record object contains one or more enterprise fields.

To view the default properties committed to the record object, see the record property below.

For built-in records, each unique record is committed only once, even if the commitRecord() method is called multiple times for the same unique record.

findField(field: Number [enterpriseId: Number]): String | Number | IPAddress | Buffer | Boolean
Searches the NetFlow record and returns the specified field. Returns a null value if the field is not in the record. If the optional enterpriseId argument is included, the specified field is returned only if the enterprise ID is a match, otherwise the method returns a null value.
hasField(field: Number): Boolean
Determines whether the specified field is in the NetFlow record.

Properties

age: Number
The amount of time elapsed, expressed in seconds, between the first and last property values reported in the NetFlow record.
deltaBytes: Number
The number of L3 bytes in the flow since the last NETFLOW_RECORD event.
deltaPkts: Number
The number of packets in the flow since the last NETFLOW_RECORD event.
dscp: Number
The number representing the last differentiated services code point (DSCP) value of the flow packet.
dscpName: String
The name associated with the DSCP value of the flow packet. The following table displays well-known DSCP names:
Number Name
8 CS1
10 AF11
12 AF12
14 AF13
16 CS2
18 AF21
20 AF22
22 AF23
24 CS3
26 AF31
28 AF32
30 AF33
32 CS4
34 AF41
36 AF42
38 AF43
40 CS5
44 VA
46 EF
48 CS6
56 CS7
egressInterface: FlowInterface
The FlowInterface object that identifies the output device.
fields: Array
An array of objects that contain information fields found in the flow packets. Each object can contain the following properties:
fieldID: Number
The ID number that represents the field type.
enterpriseID: Number
The ID number that represents enterprise-specific information.
first: Number
The amount of time elapsed, expressed in milliseconds, since the epoch of the first packet in the flow.
format: String
The format of the NetFlow record. Valid values are NetFlow v5, NetFlow v9, and IPFIX.
ingressInterface: FlowInterface
The FlowInterface object that identifies the input device.
ipPrecedence: Number
The value of the IP precedence field associated with the DSCP of the flow packet.
ipproto: String
The IP protocol associated with the flow, such as TCP or UDP.
last: Number
The amount of time elapsed, expressed in milliseconds, since the epoch of the last packet in the flow.
network: FlowNetwork
An object that identifies the FlowNetwork and contains the following properties:
id: String
The identifier of the FlowNetwork.
ipaddr: IPAddress
The IP address of the FlowNetwork.
nextHop: IPAddress
The IP address of the next hop router.
observationDomain: Number
The ID of the observation domain for the template.
receiver: Object
An object that identifies the receiver and contains the following properties:
asn: Number
The autonomous system number (ASN) of the destination device.
ipaddr: IPAddress
The IP address of the destination device.
prefixLength: Number
The number of bits in the prefix of the destination address.
port: Number
The TCP or UDP port number of the destination device.
record: Object
The record object committed to the ExtraHop Explore appliance through a call to NetFlow.commitRecord() on a NETFLOW_RECORD event.
Note:A null value is returned if the record contains one or more enterprise fields.

The record object contains the following default properties:

  • age
  • dscpName
  • deltaBytes
  • deltaPkts
  • egressInterface
  • first
  • format
  • ingressInterface
  • last
  • network
  • networkAddr
  • nextHop
  • proto
  • receiverAddr
  • receiverAsn
  • receiverPort
  • receiverPrefixLength
  • senderAddr
  • senderAsn
  • senderPort
  • senderPrefixLength
  • tcpFlagName
  • tcpFlags
sender: Object
An object that identifies the sender and contains the following properties:
asn: Number
The autonomous system number (ASN) of the source device.
ipaddr: IPAddress
The IP address of the source device.
prefixLength: Number
The number of bits in the prefix of the source address.
port: Number
The TCP or UDP port number of the source device.
tcpFlagNames: Array
A string array of TCP flag names, such as SYN or ACK, found in the flow packets.
tcpFlags: Number
The bitwise OR of all TCP flags set on the flow.
templateID: Number
The ID of the template that is referred to by the record. Template IDs are applicable only to IPFIX and NetFlow v9 records.
tos: Number
The type of service (ToS) number defined in the IP header.

NFS

The NFS class enables you to store metrics and access properties on NFS_REQUEST and NFS_RESPONSE events.

Events

NFS_REQUEST
Runs on every NFS request processed by the device.
NFS_RESPONSE
Runs on every NFS response processed by the device

Methods

commitRecord(): void
Commits a record object to the ExtraHop Explore appliance on an NFS_RESPONSE event. Record commits on NFS_REQUEST events are not supported.

To view the default properties committed to the record object, see the record property below.

For built-in records, each unique record is committed only once, even if the commitRecord() method is called multiple times for the same unique record.

Properties

accessTime: Number
The amount of time taken by the server to access a file on disk, expressed in milliseconds. For NFS, it is the time from every non-pipelined READ and WRITE command in an NFS flow until the payload containing the response is recorded by the ExtraHop system. The value is NaN on malformed and aborted responses, or if the timing is invalid or is not applicable.

Access only on NFS_RESPONSE events or an error will occur.

authMethod: String
The method for authenticating users.
error:String
The detailed error message recorded by the ExtraHop system.

Access only on NFS_RESPONSE events or an error will occur.

fileHandle: Buffer
The file handle returned by the server on LOOKUP, CREATE, SYMLINK, MKNOD, LINK, or READDIRPLUS operations.
isCommandFileInfo: Boolean
The value is true for file info commands.
isCommandRead: Boolean
The value is true for READ commands.
isCommandWrite: Boolean
The value is true for WRITE commands.
method: String
The NFS method. Valid methods are listed under the NFS metric in the ExtraHop Web UI.
offset: Number
The file offset associated with NFS READ and WRITE commands.

Access only on NFS_REQUEST events or an error will occur.

processingTime: Number
The server processing time, expressed in milliseconds. The value is NaN on malformed and aborted responses or if the timing is invalid.

Access only on NFS_RESPONSE events or an error will occur.

record: Object
The record object committed to the ExtraHop Explore appliance through a call to NFS.commitRecord() on a NFS_RESPONSE event.

The record object contains the following default properties:

  • accessTime
  • authMethod
  • clientZeroWnd
  • error
  • isCommandFileInfo
  • isCommandRead
  • isCommandWrite
  • isRspAborted
  • method
  • offset
  • processingTime
  • renameDirChanged
  • reqSize
  • reqXfer
  • resource
  • rspSize
  • rspXfer
  • serverZeroWnd
  • statusCode
  • txID
  • user
  • version

Access the record object only on NFS_RESPONSE events or an error will occur.

renameDirChanged: Boolean
The value is true if a resource rename request includes a directory move.

Access only on NFS_REQUEST events or an error will occur.

reqBytes: Number
The number of L4 request bytes.

Access only on NFS_RESPONSE events or an error will occur.

reqL2Bytes: Number
The number of L2 request bytes.

Access only on NFS_RESPONSE events or an error will occur.

reqPkts: Number
The number of request packets.

Access only on NFS_RESPONSE events or an error will occur.

reqRTO: Number
The number of request retransmission timeouts (RTOs).

Access only on NFS_REQUEST events or an error will occur.

reqSize: Number
The size of the request payload, expressed in bytes.
reqTransferTime: Number
The request transfer time, expressed in milliseconds. If the request is contained in a single packet, the transfer time is zero. If the request spans multiple packets, the value is the amount of time between detection of the first NFS request packet and detection of the last packet by the ExtraHop system. A high value might indicate a large NFS request or a network delay. The value is NaN if there is no valid measurement, or if the timing is invalid.

Access only on NFS_REQUEST events or an error will occur.

reqZeroWnd: Number
The number of zero windows in the request.
resource: String
The path and filename, concatenated together.
roundTripTime: Number
The median round trip time (RTT), expressed in milliseconds. The value is NaN if there are no RTT samples.

Access only on NFS_RESPONSE events or an error will occur.

rspBytes: Number
The number of L4 response bytes.

Access only on NFS_RESPONSE events or an error will occur.

rspL2Bytes: Number
The number of L2 response bytes.

Access only on NFS_RESPONSE events or an error will occur.

rspPkts: Number
The number of response packets.

Access only on NFS_RESPONSE events or an error will occur.

rspRTO: Number
The number of request retransmission timeouts (RTOs).

Access only on NFS_RESPONSE events or an error will occur.

rspSize: Number
The size of the response payload, expressed in bytes.

Access only on NFS_RESPONSE events or an error will occur.

rspTransferTime: Number
The response transfer time, expressed in milliseconds. If the response is contained in a single packet, the transfer time is zero. If the response spans multiple packets, the value is the amount of time between detection of the first NFS response packet and detection of the last packet by the ExtraHop system. A high value might indicate a large NFS response or a network delay. The value is NaN if there is no valid measurement, or if the timing is invalid.

Access only on NFS_RESPONSE events or an error will occur.

rspZeroWnd: Number
The number of zero windows in the response.
statusCode: String
The NFS status code of the request or response.
txId: Number
The transaction ID.
user: String
The ID of the Linux user, formatted as uid:xxxx@ip_address.
version: Number
The NFS version.

POP3

The POP3 class enables you to store metrics and access properties on POP3_REQUEST and POP3_RESPONSE events.

Events

POP3_REQUEST
Runs on every POP3 request processed by the device.
POP3_RESPONSE
Runs on every POP3 response processed by the device.

Methods

commitRecord(): void
Commits a record object to the ExtraHop Explore appliance on a POP3_RESPONSE event. Record commits on POP3_REQUEST events are not supported.

To view the default properties committed to the record object, see the record property below.

For built-in records, each unique record is committed only once, even if the commitRecord() method is called multiple times for the same unique record.

Properties

dataSize: Number
The size of the message, expressed in bytes.

Access only on POP3_RESPONSE events or an error will occur.

error: String
The detailed error message recorded by the ExtraHop system.

Access only on POP3_RESPONSE events or an error will occur.

isEncrypted: Boolean
The value is true if the transaction is over a secure POP3 server.
isReqAborted: Boolean
The value is true if the connection is closed before the POP3 request was complete.
isRspAborted: Boolean
The value is true if the connection is closed before the POP3 response was complete.

Access only on POP3_RESPONSE events or an error will occur.

method: String
The POP3 method such as RETR or DELE.
processingTime: Number
The server processing time, expressed in milliseconds. The value is NaN on malformed and aborted responses or if the timing is invalid.

Access only on POP3_RESPONSE events or an error will occur.

recipientList: Array
An array that contains a list of recipient addresses.

Access only on POP3_RESPONSE events or an error will occur.

record: Object
The record object committed to the ExtraHop Explore appliance through a call to POP3.commitRecord() on a POP3_RESPONSE event.

The record object contains the following default properties:

  • clientZeroWnd
  • dataSize
  • error
  • isEncrypted
  • isReqAborted
  • isRspAborted
  • method
  • processingTime
  • recipientList
  • reqSize
  • reqTimeToLastByte
  • rspSize
  • rspTimeToFirstByte
  • rspTimeToLastByte
  • sender
  • serverZeroWnd
  • statusCode

Access the record object only on POP3_RESPONSE events or an error will occur.

reqBytes: Number
The number of L4 request bytes.
reqL2Bytes: Number
The number of L2 request bytes.
reqPkts: Number
The number of request packets.
reqRTO: Number
The number of request retransmission timeouts (RTOs).
reqSize: Number
The size of the request payload, expressed in bytes. The size does not include headers.
reqTimeToLastByte: Number
The time from the first byte of the request until the last byte of the request, expressed in milliseconds. The value is NaN on expired requests and responses, or if the timing is invalid.
reqZeroWnd: Number
The number of zero windows in the request.
roundTripTime: Number
The median TCP round trip time (RTT), expressed in milliseconds. The value is NaN if there are no RTT samples.

Access only on POP3_RESPONSE events or an error will occur.

rspBytes: Number
The number of L4 response bytes.

Access only on POP3_RESPONSE events or an error will occur.

rspL2Bytes: Number
The number of response L2 bytes.

Access only on POP3_RESPONSE events or an error will occur.

rspPkts: Number
The number of response packets.

Access only on POP3_RESPONSE events or an error will occur.

rspRTO: Number
The number of response retransmission timeouts (RTOs).

Access only on POP3_RESPONSE events or an error will occur.

rspSize: Number
The size of the response payload, expressed in bytes. The size does not include headers.

Access only on POP3_RESPONSE events or an error will occur.

rspTimeToFirstByte: Number
The time from the first byte of the request until the furst byte of the response, expressed in milliseconds. The value is NaN on malformed and aborted responses, or if the timing is invalid.

Access only on POP3_RESPONSE events or an error will occur.

rspTimeToLastByte: Number
The time from the first byte of the request until the last byte of the response, expressed in milliseconds. The value is NaN on malformed and aborted responses, or if the timing is invalid.

Access only on POP3_RESPONSE events or an error will occur.

rspZeroWnd: Number
The number of zero windows in the response.
sender: String
The address of the sender of the message.

Access only on POP3_RESPONSE events or an error will occur.

status: String
The POP3 status message of the response which can be OK, ERR or NULL.

Access only on POP3_RESPONSE events or an error will occur.

Redis

Remote Dictionary Server (Redis) is an open-source, in-memory data structure server. The Redis class enables you to store metrics and access properties on REDIS_REQUEST and REDIS_RESPONSE events.

Events

REDIS_REQUEST
Runs on every Redis request processed by the device.
REDIS_RESPONSE
Runs on every Redis response processed by the device.

Methods

commitRecord(): void
Commits a record object to the ExtraHop Explore appliance on either a REDIS_REQUEST or REDIS_RESPONSE event.

The event determines which properties are committed to the record object. To view the default properties committed for each event, see the record property below.

For built-in records, each unique record is committed only once, even if the commitRecord() method is called multiple times for the same unique record.

Properties

errors: Array
An array of detailed error messages recorded by the ExtraHop system.

Access only on REDIS_RESPONSE events or an error will occur.

isReqAborted: Boolean
The value is true if the connection is closed before the Redis request was complete.
isRspAborted: Boolean
The value is true if the connection is closed before the Redis response was complete.

Access only on REDIS_RESPONSE events or an error will occur.

method: String
The Redis method such as GET or KEYS.
payload: Buffer
The body of the response or request.
processingTime: Number
The server processing time, expressed in milliseconds. The value is NaN on malformed and aborted responses or if the timing is invalid.

Access only on REDIS_RESPONSE events or an error will occur.

record: Object
The record object committed to the ExtraHop Explore appliance through a call to Redis.commitRecord() on either an REDIS_REQUEST or REDIS_RESPONSE event.

The event on which the method was called determines which default properties the record object contains as displayed in the following table:

REDIS_REQUEST REDIS_RESPONSE
clientZeroWnd clientZeroWnd
method error
reqKey method
reqSize processingTime
reqTransferTime reqKey
isReqAborted rspSize
serverZeroWnd rspTransferTime
  isRspAborted
  rspTimeToFirstByte
  rspTimeToLastByte
  serverZeroWnd
reqKey: Array
An array containing the Redis key strings sent with the request.
reqBytes: Number
The number of L4 request bytes.
reqL2Bytes: Number
The number of L2 request bytes.
reqPkts: Number
The number of request packets.
reqRTO: Number
The number of request retransmission timeouts (RTOs).
reqSize: Number
The size of the request payload, expressed in bytes. The size does not include headers.
reqTransferTime: Number
The request transfer time, expressed in milliseconds. If the request is contained in a single packet, the transfer time is zero. If the request spans multiple packets, the value is the amount of time between detection of the first Redis request packet and detection of the last packet by the ExtraHop system. A high value might indicate a large Redis request or a network delay. The value is NaN if there is no valid measurement, or if the timing is invalid.
reqZeroWnd: Number
The number of zero windows in the request.
roundTripTime: Number
The median TCP round trip time (RTT), expressed in milliseconds. The value is NaN if there are no RTT samples.
rspBytes: Number
The number of L4 response bytes.
rspL2Bytes: Number
The number of response L2 bytes.
rspPkts: Number
The number of response packets.
rspRTO: Number
The number of response retransmission timeouts (RTOs).
rspTransferTime: Number
The response transfer time, expressed in milliseconds. If the response is contained in a single packet, the transfer time is zero. If the response spans multiple packets, the value is the amount of time between detection of the first Redis response packet and detection of the last packet by the ExtraHop system. A high value might indicate a large Redis response or a network delay. The value is NaN if there is no valid measurement, or if the timing is invalid.

Access only on REDIS_RESPONSE events or an error will occur.

rspSize: Number
The size of the response payload, expressed in bytes. The size does not include headers.

Access only on REDIS_RESPONSE events or an error will occur.

rspTimeToFirstByte: Number
The time from the first byte of the request until the furst byte of the response, expressed in milliseconds. The value is NaN on malformed and aborted responses, or if the timing is invalid.

Access only on REDIS_RESPONSE events or an error will occur.

rspTimeToLastByte: Number
The time from the first byte of the request until the last byte of the response, expressed in milliseconds. The value is NaN on malformed and aborted responses, or if the timing is invalid.

Access only on REDIS_RESPONSE events or an error will occur.

rspZeroWnd: Number
The number of zero windows in the response.

RTCP

The RTCP class enables you to store metrics and access properties on RTCP_MESSAGE events.

Events

RTCP_MESSAGE
Runs on every RTCP UDP packet processed by the device.

Methods

commitRecord(): void
Commits a record object to the ExtraHop Explore appliance on an RTCP_MESSAGE event.

To view the default properties committed to the record object, see the record property below.

For built-in records, each unique record is committed only once, even if the commitRecord() method is called multiple times for the same unique record.

Properties

callId: String
The Call ID for associating with a SIP flow.
packets: Array
An array of RTCP packet objects where each object represents a packet and contains a packetType field. Each object has different fields based on the message type, as described below.
packetType: String
The type of packet. If the packet type is not recognizable, then the packetType will be "Unknown N" where N is the RTP control packet type value.
Value Type Name
194 SMPTETC SMPTE time-code mapping
195 IJ Extended inter-arrival jitter report
200 SR sender report
201 RR receiver report
202 SDES source description
203 BYE goodbye
204 APP application-defined
205 RTPFB Generic RTP Feedback
206 PSFB Payload-specific
207 XR extended report
208 AVB AVB RTCP packet
209 RSI Receiver Summary Information
210 TOKEN Port Mapping
211 IDMS IDMS Settings
APP packet objects have the following fields:
name: String
The name chosen by the person defining the set of APP packets to be unique. Interpreted as four case-sensitive ASCII characters.
ssrc: Number
The SSRC of the sender.
value: Buffer
The optional application-dependent data.
BYE packet objects have the following fields:
packetType: Number
Contains the number 203 to identify this as an RTCP BYE packet.
SR packet objects have the following fields:
ntpTimestamp: Number
The NTP timestamp, converted to milliseconds since the epoch (January 1, 1970).
reportBlocks: Array
An array of report objects which contain:
fractionLost: Number
The 8-bit number indicating the number of packets lost divided by the number of packets expected.
jitter: Number
An estimate of the statistical variance of the RTP data packet interarrival time, expressed in milliseconds.
lastSR: Number
The middle 32 bits of the ntp_Timestamp received as part of the most recent RTCP sender report (SR) packet from the source SSRC. If no SR has been received yet, this field is set to zero.
lastSRDelay: Number
The delay between receiving the last SR packet from the source SSRC and sending this reception block, expressed in units of 1/65536 seconds. If no SR packet has been received yet, this field is set to zero.
packetsLost: Number
The total number of RTP data packets from the source SSRC that have been lost since the beginning of reception.
seqNum: Number
The highest sequence number received from the source SSRC.
ssrc: Number
The SSRC of the sender.
rtpTimestamp: Number
The RTP timestamp, converted to milliseconds since the epoch (January 1, 1970).
senderOctets: Number
The sender octet count.
senderPkts: Number
The sender packet count.
RR packet objects have the following fields:
reportBlocks: Array
An array of report objects which contain:
fractionLost: Number
The 8-bit number indicating the number of packets last divided by the number of packets expected.
jitter: Number
An estimate of the statistical variance of the RTP data packet interarrival, expressed in milliseconds.
lastSR: Number
The middle 32 bits of the ntp_Timestamp received as part of the most recent RTCP sender report (SR) packet from the source SSRC. If no SR has been received yet, this field is set to zero.
lastSRDelay: Number
The delay between receiving the last SR packet from the source SSRC and sending this reception report block, expressed in units of 1/65536 seconds. If no SR packet has been received yet, this field is set to zero.
packetsLost: Number
The total number of RTP data packets from the source SSRC that have been lost since the beginning of reception.
seqNum: Number
The highest sequence number received from the source SSRC.
ssrc: Number
The SSRC of the sender.
ssrc: Number
The SSRC of the sender.
SDES packet objects have the following fields:
descriptionBlocks: Array
An array of objects that contain:
type: Number
The SDES type.
SDES Type Abbrev. Name
0 END end of SDES list
1 CNAME canonical name
2 NAME user name
3 EMAIL user's electronic mail address
4 PHONE user's phone number
5 LOC geographic user location
6 TOOL name of application or tool
7 NOTE notice about the source
8 PRIV private extensions
9 H323-C ADDR H.323 callable address
10 APSI Application Specific Identifier
value: Buffer
A buffer containing the text portion of the SDES packet.
ssrc: Number
The SSRC of the sender.
XR packet objects have the following fields:
ssrc: Number
The SSRC of the sender.
xrBlocks: Array
An array of report blocks which contain:
statSummary: Object
Type 6 only. The statSummary object contains the following properties:
beginSeq: Number
The beginning sequence number for the interval.
devJitter: Number
The standard deviation of the relative transit time between each two packet series in the sequence interval.
devTTLOrHL: Number
The standard deviation of TTL or Hop Limit values of data packets in the sequence number range.
dupPackets: Number
The number of duplicate packets in the sequence number interval.
endSeq: Number
The ending sequence number for the interval.
lostPackets: Number
The number of lost packets in the sequence number interval.
maxJitter: Number
The maximum relative transmit time between two packets in the sequence interval, expressed in milliseconds.
maxTTLOrHL: Number
The maximum TTL or Hop Limit value of data packets in the sequence number range.
meanJitter: Number
The mean relative transit time between two packet series in the sequence interval, rounded to the nearest value expressible as an RTP timestamp, expressed in milliseconds.
meanTTLOrHL: Number
The mean TTL or Hop Limit value of data packets in the sequence number range.
minJitter: Number
The minimum relative transmit time between two packets in the sequence interval, expressed in milliseconds.
minTTLOrHL: Number
The minimum TTL or Hop Limit value of data packets in the sequence number range.
ssrc: Number
The SSRC of the sender.
type: Number
The XR block type.
Block Type Name
1 Loss RTE Report Block
2 Duplicate RLE Report Block
3 Packet Receipt Times Report Block