SipTrace Module

Daniel-Constantin Mierla

   <miconda@gmail.com>

Edited by

Alexandr Dubovikov

   <alexandr.dubovikov@gmail.com>

Edited by

Daniel-Constantin Mierla

   <miconda@gmail.com>

   Copyright © 2010 asipto.com

   Copyright © 2006 voice-system.ro
     __________________________________________________________________

   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 (str)
              3.3. trace_flag (integer)
              3.4. trace_on (integer)
              3.5. traced_user_avp (str)
              3.6. trace_table_avp (str)
              3.7. duplicate_uri (str)
              3.8. trace_to_database (integer)
              3.9. trace_local_ip (str)
              3.10. trace_sl_acks (integer)
              3.11. xheaders_write (integer)
              3.12. xheaders_read (integer)
              3.13. hep_mode_on (integer)

        4. Functions

              4.1. sip_trace()

        5. MI Commands

              5.1. sip_trace

        6. Database setup
        7. Known issues

   List of Examples

   1.1. Set db_url parameter
   1.2. Set sip_trace parameter
   1.3. Set trace_flag parameter
   1.4. Set trace_on parameter
   1.5. Set traced_user_avp parameter
   1.6. Set trace_table_avp parameter
   1.7. Set duplicate_uri parameter
   1.8. Set trace_to_database parameter
   1.9. Set trace_local_ip parameter
   1.10. Set trace_sl_acks parameter
   1.11. Set xheaders_write parameter
   1.12. Set xheaders_read parameter
   1.13. Set hep_mode_on parameter
   1.14. sip_trace() usage

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 (str)
        3.3. trace_flag (integer)
        3.4. trace_on (integer)
        3.5. traced_user_avp (str)
        3.6. trace_table_avp (str)
        3.7. duplicate_uri (str)
        3.8. trace_to_database (integer)
        3.9. trace_local_ip (str)
        3.10. trace_sl_acks (integer)
        3.11. xheaders_write (integer)
        3.12. xheaders_read (integer)
        3.13. hep_mode_on (integer)

   4. Functions

        4.1. sip_trace()

   5. MI Commands

        5.1. sip_trace

   6. Database setup
   7. Known issues

1. Overview

   Offer a possibility to store incoming/outgoing SIP messages in database
   and/or duplicate to the capturing server (homer encapsulation protocol
   or plain sip mode)

   There are two ways of storing information.
     * by calling explicitely the sip_trace() method in Kamailio
       configuration file. In this case the original message is processed.
     * by setting the flag equal with the value of 'trace_flag' (e.g.,
       setflag(__trace_flag__)) parameter of the module. In this case,
       the\ message sent forward is processed. The logging mechanism is
       based on TM/SL callbacks, so only messages processed with TM/SL are
       logged.

   The tracing can be turned on/off using fifo commad.

   kamctl fifo sip_trace on

   kamctl fifo sip_trace 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...
     * tm and sl modules - optional, only if you want to trace messages
       forwarded by these modules.

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 (str)
   3.3. trace_flag (integer)
   3.4. trace_on (integer)
   3.5. traced_user_avp (str)
   3.6. trace_table_avp (str)
   3.7. duplicate_uri (str)
   3.8. trace_to_database (integer)
   3.9. trace_local_ip (str)
   3.10. trace_sl_acks (integer)
   3.11. xheaders_write (integer)
   3.12. xheaders_read (integer)
   3.13. hep_mode_on (integer)

3.1. db_url (str)

   Database URL.

   Default value is "".

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

3.2. table (str)

   Name of the table where to store the SIP messages.

   Default value is "sip_trace".

   Example 1.2. Set sip_trace parameter
...
modparam("siptrace", "table", "strace")
...

3.3. trace_flag (integer)

   Which flag is used to mark messages to trace

   Default value is "0".

   Example 1.3. Set trace_flag parameter
...
modparam("siptrace", "trace_flag", 22)
...

3.4. trace_on (integer)

   Parameter to enable/disable trace (on(1)/off(0))

   Default value is "0".

   Example 1.4. Set trace_on parameter
...
modparam("siptrace", "trace_on", 1)
...

3.5. traced_user_avp (str)

   The name of the AVP storing the SIP URI of the traced user. If the AVP
   is set, messages are stored in database table and 'traced_user' column
   is filled with AVP's value. You can store the message many times for
   many users by having multiple values for this AVP.

   Default value is "NULL" (feature disabled).

   Example 1.5. Set traced_user_avp parameter
...
modparam("siptrace", "traced_user_avp", "$avp(i:123)")
modparam("siptrace", "traced_user_avp", "$avp(s:user)")
...

3.6. trace_table_avp (str)

   The name of the AVP storing the name of the table where to store the
   SIP messages. If it is not set, the value of 'table' parameter is used.
   In this way one can select dynamically where to store the traced
   messages. The table must exists, and must have the same structure as
   'sip_trace' table.

   Default value is "NULL" (feature disabled).

   Example 1.6. Set trace_table_avp parameter
...
modparam("siptrace", "trace_table_avp", "$avp(i:345)")
modparam("siptrace", "trace_table_avp", "$avp(s:siptrace_table)")
...

3.7. duplicate_uri (str)

   The address in form of SIP uri where to send a duplicate of traced
   message. It uses UDP all the time.

   Default value is "NULL".

   Example 1.7. Set duplicate_uri parameter
...
modparam("siptrace", "duplicate_uri", "sip:10.1.1.1:5888")
...

3.8. trace_to_database (integer)

   Parameter to enable/disable inserts to the Database from this Kamailio.

   In case we only want to send the SIP-Messages to the duplicate_uri and
   not store the information to the local database we can set this to "0".

   Default value is "1".

   Example 1.8. Set trace_to_database parameter
...
modparam("siptrace", "trace_to_database", 0)
...

3.9. trace_local_ip (str)

   The address to be used in fromip field for local generated messages. If
   not set, the module sets it to the address of the socket that will be
   used to send the message.

   Default value is "NULL".

   Example 1.9. Set trace_local_ip parameter
...
modparam("siptrace", "trace_local_ip", "10.1.1.1:5064")
...

3.10. trace_sl_acks (integer)

   Parameter to enable/disable tracing of SL-filtered ACKs (on=1 / off=0).

   By default all ACKs to replies generated by SL module are traced. There
   is no way to select among them. Now SL module is able to run an event
   route when such ACK arrives (event_route[sl:filtered-ack]). You can set
   this parameter to 0 and then execute sip_trace() in the event route,
   accompanied by config rules to decide which ACK to trace.

   Default value is "1".

   Example 1.10. Set trace_sl_acks parameter
...
modparam("siptrace", "trace_sl_acks", 0)
...

3.11. xheaders_write (integer)

   Parameter to enable/disable writing of x-headers.

   Stores fromip, toip, method and direction in X-Siptrace-* headers. This
   allows to transmit them to a second kamailio server using the
   duplicate_uri feature. Because the headers are added after the data is
   written to the database, the headers only show up in the packets sent
   by duplicate_uri.

   See xheaders_read, it should be used on the receiving side.

   Note: The headers are first read, then written. This allows to relay
   the information over more then two kamailio servers by setting both
   xheaders_write and xheaders_read to "1" on the servers in the middle.

   Default value is "0".

   Example 1.11. Set xheaders_write parameter
...
modparam("siptrace", "xheaders_write", 0)
...

3.12. xheaders_read (integer)

   Parameter to enable/disable reading of x-headers.

   Reads and removes the X-Siptrace-* headers. Packets not containing the
   headers are neither stored to the database nor relayed (duplicate_uri).
   See xheaders_write for further information.

   Default value is "0".

   Example 1.12. Set xheaders_read parameter
...
modparam("siptrace", "xheaders_read", 0)
...

3.13. hep_mode_on (integer)

   Parameter to enable/disable homer encapsulate mode (on(1)/off(0))

   Default value is "0".

   Example 1.13. Set hep_mode_on parameter
...
modparam("siptrace", "hep_mode_on", 1)
...

4. Functions

   4.1. sip_trace()

4.1.  sip_trace()

   Store current processed SIP message in database. It is stored in the
   form prior applying chages made to it.

   This function can be used from REQUEST_ROUTE, FAILURE_ROUTE,
   ONREPLY_ROUTE, BRANCH_ROUTE.

   Example 1.14. sip_trace() usage
...
sip_trace();
...

5. MI Commands

   5.1. sip_trace

5.1.  sip_trace

   Name: sip_trace

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

   MI FIFO Command Format:
                :sip_trace:_reply_fifo_file_
                trace_mode
                _empty_line_

6. Database setup

   Before running Kamailio with siptrace, 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 siptrace-create.sql SQL script
   in the database directories in the kamailio/scripts folder 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. Known issues

   Stateless forwarded messages (forward()) are not logged if you set the
   flag, use sip_trace().
