SipCapture Module

Alexandr Dubovikov

   <alexandr.dubovikov@gmail.com>

Edited by

Alexandr Dubovikov

   <alexandr.dubovikov@gmail.com>

   Copyright © 2011 QSC AG

   Copyright © 2011 http://www.qsc.de
     __________________________________________________________________

   Table of Contents

   1. Admin Guide

        1. Overview
        2. Dependencies

              2.1. Kamailio Modules
              2.2. External Libraries or Applications

        3. Parameters

              3.1. db_url (str)
              3.2. table_name (str)
              3.3. mt_mode (str)
              3.4. hash_source (str)
              3.5. db_insert_mode (integer)
              3.6. capture_on (integer)
              3.7. capture_mode (integer)
              3.8. hep_capture_on (integer)
              3.9. raw_ipip_capture_on (integer)
              3.10. raw_moni_capture_on (integer)
              3.11. raw_socket_listen (string)
              3.12. raw_interface (string)
              3.13. raw_sock_children (integer)
              3.14. promiscuous_on (integer)
              3.15. raw_moni_bpf_on (integer)
              3.16. capture_node (str)
              3.17. insert_retries (integer)
              3.18. insert_retry_timeout (integer)

        4. MI Commands

              4.1. sip_capture

        5. RPC Commands

              5.1. sipcapture.status param

        6. Database setup
        7. Limitations

   List of Examples

   1.1. Set db_url parameter
   1.2. Set sip_capture parameter
   1.3. Set mt_mode parameter
   1.4. Set mt_mode parameter
   1.5. db_insert_mode example
   1.6. Set capture_on parameter
   1.7. capture_mode example
   1.8. Set hep_capture_on parameter
   1.9. Set raw_ipip_capture_on parameter
   1.10. Set raw_moni_capture_on parameter
   1.11. Set raw_socket_listen parameter
   1.12. Set raw_interface parameter
   1.13. Set raw_sock_children parameter
   1.14. Set promiscous_on parameter
   1.15. Set raw_moni_bpf_on parameter
   1.16. Set capture_node parameter
   1.17. Set insert_retries parameter
   1.18. Set insert_retry_timeout parameter

Chapter 1. Admin Guide

   Table of Contents

   1. Overview
   2. Dependencies

        2.1. Kamailio Modules
        2.2. External Libraries or Applications

   3. Parameters

        3.1. db_url (str)
        3.2. table_name (str)
        3.3. mt_mode (str)
        3.4. hash_source (str)
        3.5. db_insert_mode (integer)
        3.6. capture_on (integer)
        3.7. capture_mode (integer)
        3.8. hep_capture_on (integer)
        3.9. raw_ipip_capture_on (integer)
        3.10. raw_moni_capture_on (integer)
        3.11. raw_socket_listen (string)
        3.12. raw_interface (string)
        3.13. raw_sock_children (integer)
        3.14. promiscuous_on (integer)
        3.15. raw_moni_bpf_on (integer)
        3.16. capture_node (str)
        3.17. insert_retries (integer)
        3.18. insert_retry_timeout (integer)

   4. MI Commands

        4.1. sip_capture

   5. RPC Commands

        5.1. sipcapture.status param

   6. Database setup
   7. Limitations

1. Overview

   The sipcapture module stores incoming/outgoing SIP messages in
   database.

   Kamailio can capture SIP messages in three modes
     * IPIP encapsulation. (ETHHDR+IPHDR+IPHDR+UDPHDR).
     * Monitoring/mirroring port.
     * Homer encapsulation protocol mode (HEP v1, v2, v3).

   The capturing can be turned on/off using mi or rpc commands. Example:

   kamctl fifo sip_capture on

   kamctl fifo sip_capture off

2. Dependencies

   2.1. Kamailio Modules
   2.2. External Libraries or Applications

2.1. Kamailio Modules

   The following modules must be loaded before this module:
     * database module - mysql, postrgress, dbtext, unixodbc...

2.2. External Libraries or Applications

   The following libraries or applications must be installed before
   running Kamailio with this module loaded:
     * None.

3. Parameters

   3.1. db_url (str)
   3.2. table_name (str)
   3.3. mt_mode (str)
   3.4. hash_source (str)
   3.5. db_insert_mode (integer)
   3.6. capture_on (integer)
   3.7. capture_mode (integer)
   3.8. hep_capture_on (integer)
   3.9. raw_ipip_capture_on (integer)
   3.10. raw_moni_capture_on (integer)
   3.11. raw_socket_listen (string)
   3.12. raw_interface (string)
   3.13. raw_sock_children (integer)
   3.14. promiscuous_on (integer)
   3.15. raw_moni_bpf_on (integer)
   3.16. capture_node (str)
   3.17. insert_retries (integer)
   3.18. insert_retry_timeout (integer)

3.1. db_url (str)

   Database URL.

   Default value is "".

   Example 1.1. Set db_url parameter
...
modparam("sipcapture", "db_url", "mysql://user:passwd@host/dbname")
...

3.2. table_name (str)

   Name of the table's name used to store the SIP messages. Can contain
   multiple tables, separated by "|".

   Default value is "sip_capture".

   Example 1.2. Set sip_capture parameter
...
modparam("sipcapture", "table_name", "homer_capture")
...
modparam("sipcapture", "table_name", "homer_capture1|homer_capture2");
...

3.3. mt_mode (str)

   Name of the mode used for storing data in multiple tables. Modes can be
   "rand" (random), "round_robin" (use a round_robin algorithm) or "hash"
   (use hashing to determine the table to store). These modes are only
   triggered if there is more than one table specified in table_name
   parameter, separated by "|".

   Default value is "rand".

   Example 1.3. Set mt_mode parameter
...
modparam("sipcapture", "mt_mode", "hash")
...

3.4. hash_source (str)

   The field of the SIP message used for hashing, when mt_mode is set to
   "hash". The value can be "call_id", "to_user" or "from_user".

   Default value is "call_id".

   Example 1.4. Set mt_mode parameter
...
modparam("sipcapture", "hash_source", "to_user")
...

3.5. db_insert_mode (integer)

   If set to 1, use INSERT DELAYED to store sip message into capture table
   when the DB driver has support for it. If no INSERT DELAYED support is
   offered by DB driver, then standard INSERT is used.

   Default value is 0 (no INSERT DELAYED).

   Example 1.5. db_insert_mode example
modparam("sipcapture", "db_insert_mode", 1)

3.6. capture_on (integer)

   Parameter to enable/disable capture globaly (on(1)/off(0))

   Default value is "0".

   Example 1.6. Set capture_on parameter
...
modparam("sipcapture", "capture_on", 1)
...

3.7. capture_mode (integer)

   This parameter can be used for defining a capture mode which can be
   used in the sip_capture calls as a parameter. A capture mode has a name
   and some parameters. It must be defined in the format:
   name=>param1=val1;param2=val2;... The parameters are db_url,
   table_name, mt_mode and hash_source (optional). Multiple capture modes
   can be defined by using this parameter multiple times. After this, the
   capture modes can be used like: sip_capture ("", "CAPTURE_MODE");

   Example 1.7. capture_mode example
modparam("sipcapture", "capture_mode", "mode1=>db_url=mysql://user:passwd@host/d
bname1;table_name=homer_capture1|homer_capture2;mt_mode=hash;hash_source=call_id
;")
modparam("sipcapture", "capture_mode", "mode2=>db_url=mysql://user:passwd@host/d
bname2;table_name=homer_capture3|homer_capture4;mt_mode=rand;")

3.8. hep_capture_on (integer)

   Parameter to enable/disable capture of HEP (on(1)/off(0))

   Default value is "0".

   Example 1.8. Set hep_capture_on parameter
...
modparam("sipcapture", "hep_capture_on", 1)
...

3.9. raw_ipip_capture_on (integer)

   Parameter to enable/disable IPIP capturing (on(1)/off(0))

   Default value is "0".

   Example 1.9. Set raw_ipip_capture_on parameter
...
modparam("sipcapture", "raw_ipip_capture_on", 1)
...

3.10. raw_moni_capture_on (integer)

   Parameter to enable/disable monitoring/mirroring port capturing
   (on(1)/off(0)) Only one mode on raw socket can be enabled! Monitoring
   port capturing currently supported only on Linux.

   Default value is "0".

   Example 1.10. Set raw_moni_capture_on parameter
...
modparam("sipcapture", "raw_moni_capture_on", 1)
...

3.11. raw_socket_listen (string)

   Parameter indicate an listen IP address of RAW socket for IPIP
   capturing. You can also define a port/portrange for IPIP/Mirroring
   mode, to capture SIP messages in specific ports:

   "10.0.0.1:5060" - the source/destination port of the SIP message must
   be equal 5060

   "10.0.0.1:5060-5090" - the source/destination port of the SIP message
   must be equal or be between 5060 and 5090.

   The port/portrange must be defined if you are planning to use mirroring
   capture! In this case, the part with IP address will be ignored, but to
   make parser happy, use i.e. 10.0.0.0

   Default value is "".

   Example 1.11. Set raw_socket_listen parameter
...
modparam("sipcapture", "raw_socket_listen", "10.0.0.1:5060-5090")
...
modparam("sipcapture", "raw_socket_listen", "10.0.0.1:5060")
...

3.12. raw_interface (string)

   Name of the interface to bind on the raw socket.

   Default value is "".

   Example 1.12. Set raw_interface parameter
...
modparam("sipcapture", "raw_interface", "eth0")
...

3.13. raw_sock_children (integer)

   Parameter define how many children that must be created to listen the
   raw socket.

   Default value is "1".

   Example 1.13. Set raw_sock_children parameter
...
modparam("sipcapture", "raw_sock_children", 6)
...

3.14. promiscuous_on (integer)

   Parameter to enable/disable promiscuous mode on the raw socket. Linux
   only.

   Default value is "0".

   Example 1.14. Set promiscous_on parameter
...
modparam("sipcapture", "promiscuous_on", 1)
...

3.15. raw_moni_bpf_on (integer)

   Activate Linux Socket Filter (LSF based on BPF) on the mirroring
   interface. The structure is defined in linux/filter.h. The default LSF
   accept a port/portrange from the raw_socket_listen param. Currently LSF
   supported only on Linux.

   Default value is "0".

   Example 1.15. Set raw_moni_bpf_on parameter
...
modparam("sipcapture", "raw_moni_bpf_on", 1)
...

3.16. capture_node (str)

   Name of the capture node.

   Default value is "homer01".

   Example 1.16. Set capture_node parameter
...
modparam("sipcapture", "capture_node", "homer03")
...

3.17. insert_retries (integer)

   The number of times Kamailio should retry to write to the Homer
   database in case the first attempt failed. The retry is also limited
   timewise by the insert_retry_timeout parameter. Values allowed range
   from 0 to 500.

   Default value is 0 (no retries).

   Example 1.17. Set insert_retries parameter
...
modparam("sipcapture", "insert_retries", 5)
...

3.18. insert_retry_timeout (integer)

   The time limit in seconds Kamailio retries to write to the Homer
   database in case the first attempt failed. This parameter is only used
   together with the insert_retries parameter. Values allowed range from 0
   to 300.

   Default value is 60 seconds.

   Example 1.18. Set insert_retry_timeout parameter
...
modparam("sipcapture", "insert_retry_timeout", 10)
...

4. MI Commands

   4.1. sip_capture

4.1. sip_capture

   Name: sip_capture

   Parameters:
     * capture_mode : turns on/off SIP message capturing. Possible values
       are:
          + on
          + off
       The parameter is optional - if missing, the command will return the
       status of the SIP message capturing (as string “on” or “off” )
       without changing anything.

   MI FIFO Command Format:
                :sip_capture:_reply_fifo_file_
                capture_mode
                _empty_line_

5. RPC Commands

   5.1. sipcapture.status param

5.1. sipcapture.status param

   Name: sipcapture.status

   Parameters:
     * on or off: turns on/off SIP message capturing. Possible values are:
          + on
          + off
     * “check” does not change sipcapture status, just reports the current
       status.

6. Database setup

   Before running Kamailio with the sipcapture module, you have to setup
   the database tables where the module will store the data. For that, if
   the table were not created by the installation script or you choose to
   install everything by yourself you can use the sipcapture_create.sql,
   SQL script in the sql folder of sipcapture module as template. You can
   also find the complete database documentation on the project webpage,
   http://www.kamailio.org/docs/db-tables/kamailio-db-devel.html.

7. Limitations

     * 1. Only one capturing mode on RAW socket is supported: IPIP or
       monitoring/mirroring port. Don't activate both at the same time.
     * 2. By default MySQL doesn't support INSERT DELAYED for partitioning
       table. You can patch MySQL (http://bugs.mysql.com/bug.php?id=50393)
     * 3. Mirroring port capturing works only on Linux.
