SipTrace Module

Daniel-Constantin Mierla

   <miconda@gmail.com>

Edited by

Alexandr Dubovikov

   <alexandr.dubovikov@gmail.com>

Daniel-Constantin Mierla

   <miconda@gmail.com>

Giacomo Vacca

   <giacomo.vacca@gmail.com>

Camille Oudot

   <camille.oudot@orange.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)
              3.14. hep_version (integer)
              3.15. hep_capture_id (integer)
              3.16. trace_db_mode (integer)
              3.17. trace_delayed (integer)
              3.18. send_sock_name (str)
              3.19. send_sock_addr (str)
              3.20. force_send_sock (str)
              3.21. trace_init_mode (integer)
              3.22. trace_mode (integer)
              3.23. data_mode (integer)
              3.24. auth_key (integer)
              3.25. evcb_msg (str)
              3.26. trace_dialog_ack (str)
              3.27. trace_dialog_spiral (str)

        4. Functions

              4.1. sip_trace([address][, correlation_id][, mode])
              4.2. sip_trace_mode(tmode)
              4.3. sip_trace_msg(vmsg, saddr, taddr, daddr, corrid)
              4.4. hlog([correlation_id,] message)

        5. RPC Commands

              5.1. siptrace.status param

        6. Event Routes

              6.1. event_route[siptrace:msg]

        7. Database setup
        8. Known issues

   List of Examples

   1.1. Set db_url parameter
   1.2. Set table 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. Set hep_version parameter
   1.15. Set hep_capture_id parameter
   1.16. Set trace_db_mode parameter
   1.17. Set trace_delayed parameter
   1.18. Set send_sock_name parameter
   1.19. Set send_sock_addr parameter
   1.20. Set trace_init_mode parameter
   1.21. Set trace_mode parameter
   1.22. Set data_mode parameter
   1.23. Set auth_key parameter
   1.24. Set evcb_msg parameter
   1.25. Set trace_dialog_ack parameter
   1.26. Set trace_dialog_spiral parameter
   1.27. sip_trace() usage
   1.28. sip_trace_mode() usage
   1.29. sip_trace_msg() usage
   1.30. hlog() usage
   1.31. Send relayed ACK message

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)
        3.14. hep_version (integer)
        3.15. hep_capture_id (integer)
        3.16. trace_db_mode (integer)
        3.17. trace_delayed (integer)
        3.18. send_sock_name (str)
        3.19. send_sock_addr (str)
        3.20. force_send_sock (str)
        3.21. trace_init_mode (integer)
        3.22. trace_mode (integer)
        3.23. data_mode (integer)
        3.24. auth_key (integer)
        3.25. evcb_msg (str)
        3.26. trace_dialog_ack (str)
        3.27. trace_dialog_spiral (str)

   4. Functions

        4.1. sip_trace([address][, correlation_id][, mode])
        4.2. sip_trace_mode(tmode)
        4.3. sip_trace_msg(vmsg, saddr, taddr, daddr, corrid)
        4.4. hlog([correlation_id,] message)

   5. RPC Commands

        5.1. siptrace.status param

   6. Event Routes

        6.1. event_route[siptrace:msg]

   7. Database setup
   8. Known issues

1. Overview

   The SIPtrace module offers a possibility to store incoming and outgoing
   SIP messages in a database and/or duplicate to the capturing server
   (using HEP, the Homer encapsulation protocol, or plain SIP mode). Since
   version 5.3.0 new levels of tracing are available. Transactions and
   dialogs can be traced.

   There are multiple ways of storing information:
     * by calling the sip_trace() method explicitly in the Kamailio
       configuration file. In this case the original message is processed
       along with its corresponding transaction/dialog if certain flags
       are used.
     * by setting “trace_mode” to mirror or store to db all traffic.

   The tracing can be turned on/off using Kamailio RPC commands.

   kamctl rpc siptrace.status on

   kamctl rpc siptrace.status off

2. Dependencies

   2.1. Kamailio Modules
   2.2. External Libraries or Applications

2.1. Kamailio Modules

   The following modules must be conditionally loaded before this module:
     * A database module - Mysql, Postgres, dbtext, unixODBC... Optional,
       if tracing to DB is enabled.
     * dialog, 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)
   3.14. hep_version (integer)
   3.15. hep_capture_id (integer)
   3.16. trace_db_mode (integer)
   3.17. trace_delayed (integer)
   3.18. send_sock_name (str)
   3.19. send_sock_addr (str)
   3.20. force_send_sock (str)
   3.21. trace_init_mode (integer)
   3.22. trace_mode (integer)
   3.23. data_mode (integer)
   3.24. auth_key (integer)
   3.25. evcb_msg (str)
   3.26. trace_dialog_ack (str)
   3.27. trace_dialog_spiral (str)

3.1. db_url (str)

   Database URL.

   Default value is "mysql://kamailio:kamailiorw@localhost/kamailio".

   Example 1.1. Set db_url parameter
...
modparam("siptrace", "db_url", "dbdriver://username:password@dbhost/dbname")
...

3.2. table (str)

   Name of the table where to store the SIP messages.

   Default value is “sip_trace”.

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

3.3. trace_flag (integer)

   Which flag is used to mark messages to trace without traced user.

   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 a database table and the “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(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 exist, and must have the same structure as the
   “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 a SIP URI where to send a duplicate of traced
   message.

   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 locally 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. The SL module is able to run an event
   route when such an 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 relaying
   the information over more than 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)
...

3.14. hep_version (integer)

   The parameter indicate the version of the HEP protocol. Can be “1”, “2”
   or “3”. In HEPv2 and HEPv3 the timestamp and capture agent ID will be
   included in the HEP header.

   Default value is "1".

   Example 1.14. Set hep_version parameter
...
modparam("siptrace", "hep_version", 3)
...

3.15. hep_capture_id (integer)

   The parameter indicate the capture agent ID for the HEPv2 or HEPv3
   protocol. Limitation: 16-bit integer for HEPv2, 32-bit for HEPv3.

   Default value is "1".

   Example 1.15. Set hep_capture_id parameter
...
modparam("siptrace", "hep_capture_id", 234)
...

3.16. trace_db_mode (integer)

   If set to 1, the module uses “INSERT DELAYED” to store to database
   (when it is available, otherwise falls back to “INSERT”).

   If set to 2, the module uses “ASYNC-INSERT” to store to database (when
   it is available, otherwise falls back to “INSERT”).

   Default value is 0 (use “INSERT”).

   Example 1.16. Set trace_db_mode parameter
...
modparam("siptrace", "trace_db_mode", 1)
...

3.17. trace_delayed (integer)

   Kept for backward compatibily, use trace_db_mode instead.

   If set to non-zero, ot sets trace_db_mode parameter to 1 when the
   module is initialized.

   Default value is 0.

   Example 1.17. Set trace_delayed parameter
...
modparam("siptrace", "trace_delayed", 1)
...

3.18. send_sock_name (str)

   The name of the local listen socket from where to send the duplicated
   traffic via SIP or HEP. In the absence of this parameter Kamailio
   automatically picks an interface. It has priority over 'send_sock_addr'
   parameter.

   Example 1.18. Set send_sock_name parameter
...
modparam("siptrace", "send_sock_name", "sock1")
...

3.19. send_sock_addr (str)

   The local interface in the form of SIP URI from where to send the
   duplicated traffic. In the absence of this parameter Kamailio
   automatically picks an interface.

   Example 1.19. Set send_sock_addr parameter
...
modparam("siptrace", "send_sock_addr", "sip:10.1.1.2:5000")
...

3.20. force_send_sock (str)

   It is the same as 'send_sock_addr' parameter, this being kept for
   backward compatibility when 'send_sock_name' and 'send_sock_addr' were
   introduced.

3.21. trace_init_mode (integer)

   Control what tracing modes are initialized.

   The value of the parameter can be a combination of next values:
     * 0 - all modes are initialized.
     * 1 - module initialized to do tracing only with core callback
       functions (see also 'trace_mode' parameter).
     * 2 - module initialized to do tracing only using config script flags
       and functions.

   Default value is 0.

   Example 1.20. Set trace_init_mode parameter
...
modparam("siptrace", "trace_init_mode", 1)
...

3.22. trace_mode (integer)

   If not set to 0, the module uses core events triggered when receiving
   or sending SIP traffic to store it to database or mirror it to a SIP
   capture server using HEP or UDP forwarding. It will automatically do
   the handling of all SIP traffic. It is no longer needed to set the
   siptrace flag per request or execute sip_trace(), if it is done, then
   the storing and mirroring is duplicated.

   The value of the parameter can be a combination of next values:
     * 0 - no automatic mirroring or storing of SIP traffic.
     * 1 (1st bit set) - mirror the traffic to HEP server.
     * 2 (2nd bit set) - store the traffic to database server.
     * 4 (3rd bit set) - mirror the traffic to the SIP URI specified by
       duplicate_uri.

   The trace_on parameter still has to be set, allowing also to control
   this mode of mirroring via RPC commands.

   Default value is 0.

   Example 1.21. Set trace_mode parameter
...
modparam("siptrace", "trace_on", 1)
modparam("siptrace", "trace_mode", 1)
...
modparam("siptrace", "trace_mode", 3)
...

3.23. data_mode (integer)

   A set of flags to control what data is used for the trace. If flag 1
   (value 1) is set, then advertised address (when set) is used instead of
   socket bind address.

   Default value is 0.

   Example 1.22. Set data_mode parameter
...
modparam("siptrace", "data_mode", 1)
...

3.24. auth_key (integer)

   A string with an authorization key. Supported on HEPv3 only.

   Default value is empty.

   Example 1.23. Set auth_key parameter
...
modparam("siptrace", "auth_key", "spoihepuirthpeuia")
...

3.25. evcb_msg (str)

   Set the name of KEMI function to be executed instead of
   event_route[siptrace:msg].

   Default value is empty.

   Example 1.24. Set evcb_msg parameter
...
modparam("siptrace", "evcb_msg", "ksr_siptrace_msg")
...

3.26. trace_dialog_ack (str)

   Enable tracing of in-dialog ACK. Before this param, one must have set
   the onsend() route and captured the outgoing ACK there.

   Default value is 1 (enabled).

   Example 1.25. Set trace_dialog_ack parameter
...
modparam("siptrace", "trace_dialog_ack", 1)
...

3.27. trace_dialog_spiral (str)

   Enable tracing of dialog spirals. A spiraled dialog is a dialog
   established by a SIP INVITE that loops back to the same kamailio (as
   next hop). Right now, inside the siptrace code, a spiraled dialog is
   identified by (*params->param == NULL).

   Default value is 1 (enabled).

   Example 1.26. Set trace_dialog_spiral parameter
...
modparam("siptrace", "trace_dialog_spiral", 1)
...

4. Functions

   4.1. sip_trace([address][, correlation_id][, mode])
   4.2. sip_trace_mode(tmode)
   4.3. sip_trace_msg(vmsg, saddr, taddr, daddr, corrid)
   4.4. hlog([correlation_id,] message)

4.1.  sip_trace([address][, correlation_id][, mode])

   Store or forward the current processed SIP message/transaction/dialog
   in a database. It is stored in the form prior applying changes made to
   it. Based on mode, one can trace the current message('m'), the current
   transaction('t') or the current dialog('d'). If no mode is given, it
   falls back to the default mode - transaction tracking when trace_flag
   is set, otherwise only the current message.

   Meaning of the parameters is as follows:
     * address - The address in form of SIP URI where to send a duplicate
       of traced message. This parameter trumps duplicate_uri and allows
       tracing to more than one server.
     * correlation_id - A string with a correlation ID to be added to the
       HEP header when using HEPv3. It's possible to use PVs.
     * mode - SIP messages to be traced. One can trace the current message
       (function can be called on either a reply or a request), the
       current transaction(the route must belong to a request) or the
       current dialog(the message has to be an invite).

   This function can be used from REQUEST_ROUTE, FAILURE_ROUTE,
   ONREPLY_ROUTE, BRANCH_ROUTE.
   Default value is "NULL".

   Example 1.27. sip_trace() usage
...
sip_trace();
...
sip_trace("sip:10.1.1.2:5085");
...
sip_trace("sip:10.1.1.2:5085", "$ci-abc");
...
/* trace current dialog; needs to be done on initial INVITE and dialog has to be
 loaded */
sip_trace("sip:10.1.1.2:5085", "$ci-abc", "d");
...

4.2.  sip_trace_mode(tmode)

   Set the tracing mode: message, transaction or dialog. Only the first
   character of the parameter matters: m or M for message; t or T for
   transaction; d or D for dialog.

   In message tracing mode only the current message is stored or mirrored.
   In transaction tracing mode, all the messages of the current
   transaction are stored or mirrored. In dialog tracing mode, all the
   messages of the current dialog are stored or mirrored.

   This function can be used in ANY_ROUTE.

   Example 1.28. sip_trace_mode() usage
...
sip_trace_mode("t");
...

4.3.  sip_trace_msg(vmsg, saddr, taddr, daddr, corrid)

   Send the value of vmsg to the HEP capture server located at daddr, by
   setting saddr as source address and taddr as target address for vmsg.
   Correlation ID can be provided with corrid parameter or left as an
   empty string. The saddr and taddr have to be provided in socket address
   format (proto:ip:port) and the daddr in SIP URI format.

   This function can be used in ANY_ROUTE.

   Example 1.29. sip_trace_msg() usage
...
sip_trace_msg("$var(msg)", "udp:127.0.0.1:5062", "udp:127.0.0.1:5064", "sip:127.
0.0.1:5090", "");
...

4.4.  hlog([correlation_id,] message)

   Sends a log event as a HEP3 packet to the homer host configured in
   duplicate_uri.

   Meaning of the parameters is as follows:
     * correlation_id (optional) - Homer correlation ID for this event. If
       this parameter is not set, the current message's call-id will be
       used. (This parameter may contain PVs)
     * message - The text to send to Homer as log event. (This parameter
       may contain PVs)

   Example 1.30. hlog() usage
...
hlog("[cfg:$cfg(line)] This is a log from kamailio to Homer");
...
hlog("$hdr(P-MyID)", "Another one with a custom correlation ID");
...

5. RPC Commands

   5.1. siptrace.status param

5.1.  siptrace.status param

   Name: siptrace.status

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

   RPC Command Format:
...
kamcmd siptrace.status on
kamcmd siptrace.status off
kamcmd siptrace.status check
...

6. Event Routes

   6.1. event_route[siptrace:msg]

6.1.  event_route[siptrace:msg]

   The event route is executed when mirroring SIP traffic using core event
   callbacks (data in/out on network). If drop() is used, then the
   mirroring is no longer done.

   Note: now only message content (e.g., headers, body) can be used for
   conditions in the event route, the source and destination addresses are
   not yet available.
...
event_route[siptrace:msg] {
    if(is_method("OPTIONS")) {
        drop();
    }
}
...

7. Database setup

   Before running Kamailio with siptrace and activated trace_to_database
   parameter, 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,
   https://www.kamailio.org/docs/db-tables/kamailio-db-devel.html.

8. Known issues

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

   If dialog level tracing is used internally generated BYE transaction(in
   case of internal timeouts) won't be traced. At the moment kamailio
   offers no possibility to trace those messages.

   Trace_info xavp name is reserved by this module. Any use of xavp with
   this name will result in overlapping internal avp used by the module
   therefore causing unknown consequences.

   Example 1.31. Send relayed ACK message
...
onsend_route {
    if (is_method("ACK")) {
        sip_trace();
    }
}
...
