kamailio/modules_k/acc

Acc Module

Jiri Kuthan

   iptel.org
   <jiri@iptel.org>

Bogdan-Andrei Iancu

   voice-system.ro
   <bogdan@voice-system.ro>

Ramona-Elena Modroiu

   rosdev.ro
   <ramona@rosdev.ro>

Edited by

Bogdan-Andrei Iancu

   voice-system.ro
   <bogdan@voice-system.ro>

   Copyright © 2002, 2003 FhG FOKUS

   Copyright © 2004, 2006 voice-system.ro
   Revision History
   Revision $Revision$ $Date$
     __________________________________________________________________

   Table of Contents

   1. Admin Guide

        1. Overview

              1.1. General Example

        2. Extra accounting

              2.1. Overview
              2.2. Definitions and syntax
              2.3. How it works

        3. Multi Call-Legs accounting

              3.1. Overview
              3.2. Configuration
              3.3. Logged data

        4. Dependencies

              4.1. Kamailio Modules
              4.2. External Libraries or Applications

        5. Exported Parameters

              5.1. early_media (integer)
              5.2. failed_transaction_flag (integer)
              5.3. report_ack (integer)
              5.4. report_cancels (integer)
              5.5. detect_direction (integer)
              5.6. multi_leg_info (string)
              5.7. log_flag (integer)
              5.8. log_missed_flag (integer)
              5.9. log_level (integer)
              5.10. log_facility (string)
              5.11. log_extra (string)
              5.12. radius_config (string)
              5.13. radius_flag (integer)
              5.14. radius_missed_flag (integer)
              5.15. service_type (integer)
              5.16. radius_extra (string)
              5.17. db_flag (integer)
              5.18. db_missed_flag (integer)
              5.19. db_table_acc (string)
              5.20. db_table_missed_calls (string)
              5.21. db_url (string)
              5.22. acc_method_column (string)
              5.23. acc_from_tag_column (string)
              5.24. acc_to_tag_column (string)
              5.25. acc_callid_column (string)
              5.26. acc_sip_code_column (string)
              5.27. acc_sip_reason_column (string)
              5.28. acc_time_column (string)
              5.29. db_extra (string)
              5.30. diameter_flag (integer)
              5.31. diameter_missed_flag (integer)
              5.32. diameter_client_host (string)
              5.33. diameter_client_port (int)
              5.34. diameter_extra (string)

        6. Exported Functions

              6.1. acc_log_request(comment)
              6.2. acc_db_request(comment, table)
              6.3. acc_rad_request(comment)
              6.4. acc_diam_request(comment)

   2. Frequently Asked Questions

   List of Examples

   1.1. early_media example
   1.2. failed_transaction_flag example
   1.3. report_ack example
   1.4. report_cancels example
   1.5. detect_direction example
   1.6. multi_leg_info example
   1.7. log_flag example
   1.8. log_missed_flag example
   1.9. log_level example
   1.10. log_facility example
   1.11. log_extra example
   1.12. radius_config example
   1.13. radius_flag example
   1.14. radius_missed_flag example
   1.15. service_type example
   1.16. radius_extra example
   1.17. db_flag example
   1.18. db_missed_flag example
   1.19. db_table_acc example
   1.20. db_table_missed_calls example
   1.21. db_url example
   1.22. acc_method_column example
   1.23. acc_from_tag_column example
   1.24. acc_to_tag_column example
   1.25. acc_callid_column example
   1.26. acc_sip_code_column example
   1.27. acc_sip_reason_column example
   1.28. acc_time_column example
   1.29. db_extra example
   1.30. diameter_flag example
   1.31. diameter_missed_flag example
   1.32. diameter_client_host example
   1.33. diameter_client_host example
   1.34. diameter_extra example
   1.35. acc_log_request usage
   1.36. acc_db_request usage
   1.37. acc_rad_request usage
   1.38. acc_diam_request usage

Chapter 1. Admin Guide

   Table of Contents

   1. Overview

        1.1. General Example

   2. Extra accounting

        2.1. Overview
        2.2. Definitions and syntax
        2.3. How it works

   3. Multi Call-Legs accounting

        3.1. Overview
        3.2. Configuration
        3.3. Logged data

   4. Dependencies

        4.1. Kamailio Modules
        4.2. External Libraries or Applications

   5. Exported Parameters

        5.1. early_media (integer)
        5.2. failed_transaction_flag (integer)
        5.3. report_ack (integer)
        5.4. report_cancels (integer)
        5.5. detect_direction (integer)
        5.6. multi_leg_info (string)
        5.7. log_flag (integer)
        5.8. log_missed_flag (integer)
        5.9. log_level (integer)
        5.10. log_facility (string)
        5.11. log_extra (string)
        5.12. radius_config (string)
        5.13. radius_flag (integer)
        5.14. radius_missed_flag (integer)
        5.15. service_type (integer)
        5.16. radius_extra (string)
        5.17. db_flag (integer)
        5.18. db_missed_flag (integer)
        5.19. db_table_acc (string)
        5.20. db_table_missed_calls (string)
        5.21. db_url (string)
        5.22. acc_method_column (string)
        5.23. acc_from_tag_column (string)
        5.24. acc_to_tag_column (string)
        5.25. acc_callid_column (string)
        5.26. acc_sip_code_column (string)
        5.27. acc_sip_reason_column (string)
        5.28. acc_time_column (string)
        5.29. db_extra (string)
        5.30. diameter_flag (integer)
        5.31. diameter_missed_flag (integer)
        5.32. diameter_client_host (string)
        5.33. diameter_client_port (int)
        5.34. diameter_extra (string)

   6. Exported Functions

        6.1. acc_log_request(comment)
        6.2. acc_db_request(comment, table)
        6.3. acc_rad_request(comment)
        6.4. acc_diam_request(comment)

1. Overview

   1.1. General Example

   ACC module is used to account transactions information to different
   backends like syslog, SQL, RADIUS and DIAMETER (beta version).

   To account a transaction and to choose which set of backends to be
   used, the script writer just has to set some flags (see the module
   parameters section for flag definitions Section 5, “Exported
   Parameters”). If the accounting flag for a specific backend is set, the
   acc module will then report on completed transaction. A typical usage
   of the module takes no acc-specific script command -- the functionality
   binds invisibly through transaction processing. Script writers just
   need to mark the transaction for accounting with proper setflag. Even
   so, the module allows the script writter to force accounting in special
   cases via some script functions.

   The accounting module will log by default a fixed set of attributes for
   the transaction - if you customize your accounting by adding more
   information to be logged, please see the next chapter about extra
   accounting - Section 2, “Extra accounting”.

   The fixed minimal accounting information is:
     * Request Method name
     * From header TAG parameter
     * To header TAG parameter
     * Call-Id
     * 3-digit Status code from final reply
     * Reason phrase from final reply
     * Time stamp when transaction was completed

   If a value is not present in request, the empty string is accounted
   instead.

   Note that:
     * A single INVITE may produce multiple accounting reports -- that's
       due to SIP forking feature.
     * All flags related to accounting need to be set in request
       processing route - only the "missed-call" flag may be toggled from
       other types of routes.
     * There is no session/dialog accounting (yet) -- Kamailio maintains
       no sessions. If one needs to correlate INVITEs with BYEs for
       generating proper CDRs for example for purpose of billing, then it
       is better done in the entity which processes accounting
       information.
     * If a UA fails in middle of conversation, a proxy will never find
       out about it. In general, a better practice is to account from an
       end-device (such as PSTN gateway), which best knows about call
       status (including media status and PSTN status in case of the
       gateway).

   The SQL backend support is compiled in the module. For RADIUS and
   DIAMETER you need to enable it by recompiling the module with properly
   set defines: uncomment the RAD_ACC or DDIAM_ACC lines in
   modules/acc/Makefile. To compile RADIUS support, you need to have
   radiusclient-ng (only versions higher or equal to 0.5.0) installed on
   your system which is available from
   http://developer.berlios.de/projects/radiusclient-ng/. The radius
   client needs to be configured properly. To do so, use the template at
   etc/radiusclient.conf and make sure that module's radius_config
   parameter points to its location. In particular, accounting secret must
   match that one configured in server and proper dictionary is used (one
   is available at etc/sip_dictionary). Also note that Debian
   radiusclient-ng uses /var/run/radius.seq as seqfile but Kamailio Debian
   init script expects /var/run/kamailio/kamailio_radius.seq, so is needed
   to change it in radiusclient-ng configuration or in Kamailio Debian
   init script (if not, Kamailio can't create the seq file when not
   running as root). Uses along with FreeRadius (
   http://www.freeradius.org/) and Radiator (
   http://www.open.com.au/radiator/) servers have been reported to us.

   NOTE: diameter support was developed for DISC (DIameter Server Client
   project at http://developer.berlios.de/projects/disc/). This project
   seems to be no longer maintained and DIAMETER specifications were
   updated in the meantime. Thus, the DIAMETER part in the module is
   obsolete and needs rework to be usable with opendiameter or other
   DIAMETER servers.

1.1. General Example

loadmodule "modules/acc/acc.so"
modparam("acc", "log_level", 1)
modparam("acc", "log_flag", 1)

if (uri=~"sip:+40") /* calls to Romania */ {
    if (!proxy_authorize("sip_domain.net" /* realm */,
    "subscriber" /* table name */))  {
        proxy_challenge("sip_domain.net" /* realm */, "0" /* no qop */ );
        exit;
    }

    if (method=="INVITE" && !check_from()) {
        log("from!=digest\n");
        sl_send_reply("403","Forbidden");
    }

    setflag(1); /* set for accounting (the same value as in log_flag!)
    t_relay();  /* enter stateful mode now */
};

2. Extra accounting

   2.1. Overview
   2.2. Definitions and syntax
   2.3. How it works

2.1. Overview

   Along the static default information, ACC modules allows dynamical
   selection of extra information to be logged. This allows you to log any
   pseudo-variable (AVPs, parts of the request, etc).

2.2. Definitions and syntax

   Selection of extra information is done via xxx_extra parameters by
   specifying the names of additional information you want to log. This
   information is defined via pseudo-variables and may include headers,
   AVPs values or other message or system values. The syntax of the
   parameter is:
     * xxx_extra = extra_definition (';'extra_definition)*
     * extra_definition = log_name '=' pseudo_variable

   The full list of supported pseudo-variables in Kamailio is available
   at: http://kamailio.org/dokuwiki/doku.php/pseudovariables:devel

   Note: For all the ACK processed by tm, the registered callbacks (like
   acc module) will be called with the corresponding INVITE transaction
   contexts as long as this is still available. This means that the ACK
   callbacks will see the AVPs setup for the INVITE transaction and not
   the AVPs setup before t_relay().

   Via log_name you define how/where the data will be logged. Its meaning
   depends of the accounting support which is used:
     * LOG accounting - log_name will be just printed along with the data
       in log_name=data format;
     * DB accounting - log_name will be the name of the DB column where
       the data will be stored.IMPORTANT: add in db acc table the columns
       corresponding to each extra data;
     * RADIUS accounting - log_name will be the AVP name used for packing
       the data into RADIUS message. The log_name will be translated to
       AVP number via the dictionary. IMPORTANT: add in RADIUS dictionary
       the log_name attribute.
     * DIAMETER accounting - log_name will be the AVP code used for
       packing the data into DIAMETER message. The AVP code is given
       directly as integer, since DIAMETER has no dictionary support yet.
       IMPORTANT: log_name must be a number.

2.3. How it works

   Some pseudo variables may return more than one value (like headers or
   AVPs). In this case, the returned values are embedded in a single
   string in a comma-separated format.

3. Multi Call-Legs accounting

   3.1. Overview
   3.2. Configuration
   3.3. Logged data

3.1. Overview

   A SIP call can have multiple legs due forwarding actions. For example
   user A calls user B which forwards the call to user C. There is only
   one SIP call but with 2 legs ( A to B and B to C). Accounting the legs
   of a call is required for proper billing of the calls (if C is a PSTN
   number and the call is billed, user B must pay for the call - as last
   party modifing the call destination-, and not A - as initiator of the
   call. Call forwarding on server is only one example which shows the
   necessity of the having an accounting engine with multiple legs
   support.

3.2. Configuration

   First how it works: The idea is to have a set of AVPs and for each call
   leg to store a set of values in the AVPs. The meaning of the AVP
   content is stricly decided by the script writer - it can be the origin
   and source of the leg, its status or any other related information. If
   you have a set of 4 AVPS (AVP1, AVP2, AVP3, AVP4), then for the "A call
   B and B forwards to C" example, you need to set a different set of
   values for the AVPs for each leg ([A,B] and [B,C]) . The script writer
   must take care and properly insert all these AVP from the script (in
   proper order and with the correct type).

   When the accounting information for the call will be written/sent, all
   the call-leg pairs will be added (based on the found AVP sets).

   By default, the multiple call-leg support is disabled - it can be
   enabled just be setting the per-leg set of AVPs via the multi_leg_info
   module parameter.

3.3. Logged data

   For each call, all the values of the AVP set (which defines a call-leg)
   will be logged. How the information will be actually logged, depends of
   the data backend:
     * syslog -- all leg-sets will be added to one record string as
       AVP1=xxx, AVP2=xxxx ,... sets.
     * database -- each pair will be separately logged (due DB data
       structure constraints); several records will be written, the
       difference between them being only the fields corresponding to the
       call-leg info.

Note
       You will need to add in your DB (all acc related tables) the colums
       for call-leg info (a column for each AVP of the set).
     * Radius -- all sets will be added to the same Radius accounting
       message as RADIUS AVPs - for each call-leg a set of RADIUS AVPs
       will be added (corresponding to the per-leg AVP set)

Note
       You will need to add in your dictionary the RADIUS AVPs used in
       call-leg AVP set definition.
     * Diameter same as for RADIUS.

4. Dependencies

   4.1. Kamailio Modules
   4.2. External Libraries or Applications

4.1. Kamailio Modules

   The module depends on the following modules (in the other words the
   listed modules must be loaded before this module):
     * tm -- Transaction Manager
     * a database module -- If SQL support is used.
     * rr -- Record Route, if “detect_direction” module parameter is
       enabled.

4.2. External Libraries or Applications

   The following libraries or applications must be installed before
   running Kamailio with this module loaded:
     * radiusclient-ng 0.5.0 or higher -- if compiled with RADIUS support.
       See http://developer.berlios.de/projects/radiusclient-ng/.

5. Exported Parameters

   5.1. early_media (integer)
   5.2. failed_transaction_flag (integer)
   5.3. report_ack (integer)
   5.4. report_cancels (integer)
   5.5. detect_direction (integer)
   5.6. multi_leg_info (string)
   5.7. log_flag (integer)
   5.8. log_missed_flag (integer)
   5.9. log_level (integer)
   5.10. log_facility (string)
   5.11. log_extra (string)
   5.12. radius_config (string)
   5.13. radius_flag (integer)
   5.14. radius_missed_flag (integer)
   5.15. service_type (integer)
   5.16. radius_extra (string)
   5.17. db_flag (integer)
   5.18. db_missed_flag (integer)
   5.19. db_table_acc (string)
   5.20. db_table_missed_calls (string)
   5.21. db_url (string)
   5.22. acc_method_column (string)
   5.23. acc_from_tag_column (string)
   5.24. acc_to_tag_column (string)
   5.25. acc_callid_column (string)
   5.26. acc_sip_code_column (string)
   5.27. acc_sip_reason_column (string)
   5.28. acc_time_column (string)
   5.29. db_extra (string)
   5.30. diameter_flag (integer)
   5.31. diameter_missed_flag (integer)
   5.32. diameter_client_host (string)
   5.33. diameter_client_port (int)
   5.34. diameter_extra (string)

5.1. early_media (integer)

   Should be early media (any provisional reply with body) accounted too ?

   Default value is 0 (no).

   Example 1.1. early_media example
modparam("acc", "early_media", 1)

5.2. failed_transaction_flag (integer)

   Per transaction flag which says if the transaction should be accounted
   also in case of failure (status>=300).

   Default value is not-set (no flag).

   Example 1.2. failed_transaction_flag example
modparam("acc", "failed_transaction_flag", 4)

5.3. report_ack (integer)

   Shall acc attempt to account e2e ACKs too ? Note that this is really
   only an attempt, as e2e ACKs may take a different path (unless RR
   enabled) and mismatch original INVITE (e2e ACKs are a separate
   transaction).

   Default value is 0 (no).

   Example 1.3. report_ack example
modparam("acc", "report_ack", 1)

5.4. report_cancels (integer)

   By default, CANCEL reporting is disabled -- most accounting
   applications wants to see INVITE's cancellation status. Turn on if you
   explicitly want to account CANCEL transactions.

   Default value is 0 (no).

   Example 1.4. report_cancels example
modparam("acc", "report_cancels", 1)

5.5. detect_direction (integer)

   Controlles the direction detection for sequential requests. If enabled
   (non zero value), for sequential requests with upstream direction (from
   callee to caller), the FROM and TO will be swapped (the direction will
   be preserved as in the original request).

   It affects all values related to TO and FROM headers (body, URI,
   username, domain, TAG).

   Default value is 0 (disabled).

   Example 1.5. detect_direction example
modparam("acc", "detect_direction", 1)

5.6. multi_leg_info (string)

   Defines the AVP set to be used in per-call-leg accounting. See
   Section 3, “Multi Call-Legs accounting” for a detailed description of
   the Multi Call-Legs accounting.

   If empty, the multi-leg accounting support will be disabled.

   Default value is 0 (disabled).

   Example 1.6. multi_leg_info example
# for syslog-based accounting, use any text you want to be printed
modparam("acc", "multi_leg_info",
    "text1=$avp(src);text2=$avp(dst)")
# for mysql-based accounting, use the names of the columns
modparam("acc", "multi_leg_info",
    "leg_src=$avp(src);leg_dst=$avp(dst)")
# for RADIUS-based accounting, use the names of the RADIUS AVPs
modparam("acc", "multi_leg_info",
    "RAD_LEG_SRC=$avp(src);RAD_LEG_SRC=$avp(dst)")
# for DIAMETER-based accounting, use the DIAMETER AVP ID (as integer)
modparam("acc", "multi_leg_info",
    "2345=$avp(src);2346=$avp(dst)")

5.7. log_flag (integer)

   Request flag which needs to be set to account a transaction via syslog.

   Default value is not-set (no flag).

   Example 1.7. log_flag example
modparam("acc", "log_flag", 2)

5.8. log_missed_flag (integer)

   Request flag which needs to be set to account missed calls via syslog.

   Default value is not-set (no flag).

   Example 1.8. log_missed_flag example
modparam("acc", "log_missed_flag", 3)

5.9. log_level (integer)

   Log level at which accounting messages are issued to syslog.

   Default value is L_NOTICE.

   Example 1.9. log_level example
modparam("acc", "log_level", 2)   # Set log_level to 2

5.10. log_facility (string)

   Log facility to which accounting messages are issued to syslog. This
   allows to easily seperate the accounting specific logging from the
   other log messages.

   Default value is LOG_DAEMON.

   Example 1.10. log_facility example
modparam("acc", "log_facility", "LOG_DAEMON")

5.11. log_extra (string)

   Extra values to be logged. See section Section 2, “Extra accounting”
   for more details.

   Default value is NULL.

   Example 1.11. log_extra example
modparam("acc", "log_extra", "ua=$hdr(User-Agent);uuid=$avp(i:123)")

5.12. radius_config (string)

   This parameter is radius specific. Path to radius client configuration
   file, set the referred config file correctly and specify there address
   of server, shared secret (should equal that in
   /usr/local/etc/raddb/clients for freeRadius servers) and dictionary,
   see etc for an example of config file and dictionary.

   If the parameter is set to empty string, the RADIUS accounting support
   will be disabled (even if compiled).

   Default value is “NULL”.

   Example 1.12. radius_config example
modparam("acc", "radius_config", "/etc/radiusclient/radiusclient.conf")

5.13. radius_flag (integer)

   Request flag which needs to be set to account a transaction -- RADIUS
   specific.

   Default value is not-set (no flag).

   Example 1.13. radius_flag example
modparam("acc", "radius_flag", 2)

5.14. radius_missed_flag (integer)

   Request flag which needs to be set to account missed calls -- RADIUS
   specific.

   Default value is not-set (no flag).

   Example 1.14. radius_missed_flag example
modparam("acc", "radius_missed_flag", 3)

5.15. service_type (integer)

   Radius service type used for accounting.

   Default value is 15 (SIP).

   Example 1.15. service_type example
modparam("acc", "service_type", 16)

5.16. radius_extra (string)

   Extra values to be logged via RADIUS - RADIUS specific. See section
   Section 2, “Extra accounting” for more details.

   Default value is NULL.

   Example 1.16. radius_extra example
modparam("acc", "radius_extra", "via=$hdr(Via[*]); email=$avp(s:email)")

5.17. db_flag (integer)

   Request flag which needs to be set to account a transaction -- database
   specific.

   Default value is not-set (no flag).

   Example 1.17. db_flag example
modparam("acc", "db_flag", 2)

5.18. db_missed_flag (integer)

   Request flag which needs to be set to account missed calls -- database
   specific.

   Default value is not-set (no flag).

   Example 1.18. db_missed_flag example
modparam("acc", "db_missed_flag", 3)

5.19. db_table_acc (string)

   Table name of accounting successfull calls -- database specific.

   Default value is “acc”

   Example 1.19. db_table_acc example
modparam("acc", "db_table_acc", "myacc_table")

5.20. db_table_missed_calls (string)

   Table name for accounting missed calls -- database specific.

   Default value is “missed_calls”

   Example 1.20. db_table_missed_calls example
modparam("acc", "db_table_missed_calls", "myMC_table")

5.21. db_url (string)

   SQL address -- database specific. If is set to NULL or emty string, the
   SQL support is disabled.

   Default value is “NULL” (SQL disabled).

   Example 1.21. db_url example
modparam("acc", "db_url", "mysql://user:password@localhost/openser")

5.22. acc_method_column (string)

   Column name in accounting table to store the request's method name as
   string.

   Default value is “method”.

   Example 1.22. acc_method_column example
modparam("acc", "acc_method_column", "method")

5.23. acc_from_tag_column (string)

   Column name in accounting table to store the From header TAG parameter.

   Default value is “from_tag”.

   Example 1.23. acc_from_tag_column example
modparam("acc", "acc_from_tag_column", "from_tag")

5.24. acc_to_tag_column (string)

   Column name in accounting table to store the To header TAG parameter.

   Default value is “to_tag”.

   Example 1.24. acc_to_tag_column example
modparam("acc", "acc_to_tag_column", "to_tag")

5.25. acc_callid_column (string)

   Column name in accounting table to store the request's Callid value.

   Default value is “callid”.

   Example 1.25. acc_callid_column example
modparam("acc", "acc_callid_column", "callid")

5.26. acc_sip_code_column (string)

   Column name in accounting table to store the final reply's numric code
   value in string format.

   Default value is “sip_code”.

   Example 1.26. acc_sip_code_column example
modparam("acc", "acc_sip_code_column", "sip_code")

5.27. acc_sip_reason_column (string)

   Column name in accounting table to store the final reply's reason
   phrase value.

   Default value is “sip_reason”.

   Example 1.27. acc_sip_reason_column example
modparam("acc", "acc_sip_reason_column", "sip_reason")

5.28. acc_time_column (string)

   Column name in accounting table to store the time stamp of the
   transaction completion in date-time format.

   Default value is “time”.

   Example 1.28. acc_time_column example
modparam("acc", "acc_time_column", "time")

5.29. db_extra (string)

   Extra values to be logged into database - DB specific. See section
   Section 2, “Extra accounting” for more details.

   Default value is NULL.

   Example 1.29. db_extra example
modparam("acc", "db_extra", "ct=$hdr(Content-type); email=$avp(s:email)")

5.30. diameter_flag (integer)

   Request flag which needs to be set to account a transaction -- DIAMETER
   specific.

   Default value is not-set (no flag).

   Example 1.30. diameter_flag example
modparam("acc", "diameter_flag", 2)

5.31. diameter_missed_flag (integer)

   Request flag which needs to be set to account missed calls -- DIAMETER
   specific.

   Default value is not-set (no flag).

   Example 1.31. diameter_missed_flag example
modparam("acc", "diameter_missed_flag", 3)

5.32. diameter_client_host (string)

   Hostname of the machine where the DIAMETER Client is running --
   DIAMETER specific.

   Default value is “localhost”.

   Example 1.32. diameter_client_host example
modparam("acc", "diameter_client_host", "3a_server.net")

5.33. diameter_client_port (int)

   Port number where the Diameter Client is listening -- DIAMETER
   specific.

   Default value is 3000.

   Example 1.33. diameter_client_host example
modparam("acc", "diameter_client_port", 3000)

5.34. diameter_extra (string)

   Extra values to be logged via DIAMETER - DIAMETER specific. See section
   Section 2, “Extra accounting” for more details.

   Default value is NULL.

   Example 1.34. diameter_extra example
modparam("acc", "diameter_extra", "7846=$hdr(Content-type);7847=$avp(s:email)")

6. Exported Functions

   6.1. acc_log_request(comment)
   6.2. acc_db_request(comment, table)
   6.3. acc_rad_request(comment)
   6.4. acc_diam_request(comment)

6.1.  acc_log_request(comment)

   acc_request reports on a request, for example, it can be used to report
   on missed calls to off-line users who are replied 404 - Not Found. To
   avoid multiple reports on UDP request retransmission, you would need to
   embed the action in stateful processing.

   Meaning of the parameters is as follows:
     * comment - Comment to be appended.

   This function can be used from ANY_ROUTE.

   Example 1.35. acc_log_request usage
...
acc_log_request("Some comment");
...

6.2.  acc_db_request(comment, table)

   Like acc_log_request, acc_db_request reports on a request. The report
   is sent to database at “db_url”, in the table referred to in the second
   action parameter.

   Meaning of the parameters is as follows:
     * comment - Comment to be appended.
     * table - Database table to be used.

   This function can be used from ANY_ROUTE.

   Example 1.36. acc_db_request usage
...
acc_log_request("Some comment", "Some table");
...

6.3.  acc_rad_request(comment)

   Like acc_log_request, acc_rad_request reports on a request. It reports
   to radius server as configured in “radius_config”.

   Meaning of the parameters is as follows:
     * comment - Comment to be appended.

   This function can be used from ANY_ROUTE.

   Example 1.37. acc_rad_request usage
...
acc_rad_request("Some comment");
...

6.4.  acc_diam_request(comment)

   Like acc_log_request, acc_diam_request reports on a request. It reports
   to the configured Diameter server.

   Meaning of the parameters is as follows:
     * comment - Comment to be appended.

   This function can be used from ANY_ROUTE.

   Example 1.38. acc_diam_request usage
...
acc_diam_request("Some comment");
...

Chapter 2. Frequently Asked Questions

   2.1. What happend with old log_fmt parameter
   2.2. What happend with old multi_leg_enabled parameter
   2.3. What happend with old src_leg_avp_id and dst_leg_avp_id parameters
   2.4. Where can I find more about Kamailio?
   2.5. Where can I post a question about this module?
   2.6. How can I report a bug?

   2.1.

       What happend with old log_fmt parameter

       The parameter became obsolete with the restructure of the data logged
       by ACC module (refer to the Overview chapter). For similar behaviour
       you can use the extra accouting (see the coresponding chapter).

   2.2.

       What happend with old multi_leg_enabled parameter

       The parameter becaome obsolete by the addition of the new
       multi_leg_info parameter. The multi-leg accouting is automatically
       enabled when multi_leg_info is defined.

   2.3.

       What happend with old src_leg_avp_id and dst_leg_avp_id parameters

       The parameter was replaced by the more generic new parameter
       multi_leg_info. This allows logging (per-leg) of more information than
       just dst and src.

   2.4.

       Where can I find more about Kamailio?

       Take a look at http://www.kamailio.org/.

   2.5.

       Where can I post a question about this module?

       First at all check if your question was already answered on one of our
       mailing lists:
         * User Mailing List -
           http://lists.kamailio.org/cgi-bin/mailman/listinfo/users
         * Developer Mailing List -
           http://lists.kamailio.org/cgi-bin/mailman/listinfo/devel

       E-mails regarding any stable Kamailio release should be sent to
       <users@lists.kamailio.org> and e-mails regarding development versions
       should be sent to <devel@lists.kamailio.org>.

       If you want to keep the mail private, send it to
       <team@lists.kamailio.org>.

   2.6.

       How can I report a bug?

       Please follow the guidelines provided at:
       http://sourceforge.net/tracker/?group_id=139143.