MSILO Module

Daniel-Constantin Mierla

   <miconda@gmail.com>

Juha Heinanen

   <jh@tutpro.com>

Edited by

Daniel-Constantin Mierla

   <miconda@gmail.com>

Edited by

Juha Heinanen

   <jh@tutpro.com>

   Copyright © 2003 FhG FOKUS

   Copyright © 2009 Juha Heinanen
     __________________________________________________________________

   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 (string)
              3.2. db_table (string)
              3.3. from_address (string)
              3.4. contact_hdr (string)
              3.5. extra_hdrs (string)
              3.6. offline_message (string)
              3.7. content_type_hdr (string)
              3.8. reminder (string)
              3.9. outbound_proxy (string)
              3.10. expire_time (int)
              3.11. check_time (int)
              3.12. send_time (int)
              3.13. clean_period (int)
              3.14. use_contact (int)
              3.15. sc_mid (string)
              3.16. sc_from (string)
              3.17. sc_to (string)
              3.18. sc_uri_user (string)
              3.19. sc_uri_host (string)
              3.20. sc_body (string)
              3.21. sc_ctype (string)
              3.22. sc_exp_time (string)
              3.23. sc_inc_time (string)
              3.24. sc_snd_time (string)
              3.25. snd_time_avp (str)
              3.26. add_date (int)
              3.27. max_messages (int)
              3.28. add_contact (int)
              3.29. extra_hdrs_avp (str)

        4. Functions

              4.1. m_store([owner])
              4.2. m_dump([owner])

        5. Statistics

              5.1. stored_messages
              5.2. dumped_messages
              5.3. failed_messages
              5.4. dumped_reminders
              5.5. failed_reminders

        6. Installation and Running

              6.1. Kamailio config file

   List of Examples

   1.1. Set the "db_url" parameter
   1.2. Set the "db_table" parameter
   1.3. Set the "from_address" parameter
   1.4. Set the "contact_hdr" parameter
   1.5. Set the "extra_hdrs" parameter
   1.6. Set the "offline_message" parameter
   1.7. Set the "content_type_hdr" parameter
   1.8. Set the "reminder" parameter
   1.9. Set the "outbound_proxy" parameter
   1.10. Set the "expire_time" parameter
   1.11. Set the "check_time" parameter
   1.12. Set the "send_time" parameter
   1.13. Set the "clean_period" parameter
   1.14. Set the "use_contact" parameter
   1.15. Set the "sc_mid" parameter
   1.16. Set the "sc_from" parameter
   1.17. Set the "sc_to" parameter
   1.18. Set the "sc_uri_user" parameter
   1.19. Set the "sc_uri_host" parameter
   1.20. Set the "sc_body" parameter
   1.21. Set the "sc_ctype" parameter
   1.22. Set the "sc_exp_time" parameter
   1.23. Set the "sc_inc_time" parameter
   1.24. Set the "sc_snd_time" parameter
   1.25. Set the "snd_time_avp" parameter
   1.26. Set the "add_date" parameter
   1.27. Set the "max_messages" parameter
   1.28. Set the "add_contact" parameter
   1.29. Set the "extra_hdrs_avp" parameter
   1.30. m_store usage
   1.31. m_dump usage
   1.32. Kamailio config script - sample msilo 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 (string)
        3.2. db_table (string)
        3.3. from_address (string)
        3.4. contact_hdr (string)
        3.5. extra_hdrs (string)
        3.6. offline_message (string)
        3.7. content_type_hdr (string)
        3.8. reminder (string)
        3.9. outbound_proxy (string)
        3.10. expire_time (int)
        3.11. check_time (int)
        3.12. send_time (int)
        3.13. clean_period (int)
        3.14. use_contact (int)
        3.15. sc_mid (string)
        3.16. sc_from (string)
        3.17. sc_to (string)
        3.18. sc_uri_user (string)
        3.19. sc_uri_host (string)
        3.20. sc_body (string)
        3.21. sc_ctype (string)
        3.22. sc_exp_time (string)
        3.23. sc_inc_time (string)
        3.24. sc_snd_time (string)
        3.25. snd_time_avp (str)
        3.26. add_date (int)
        3.27. max_messages (int)
        3.28. add_contact (int)
        3.29. extra_hdrs_avp (str)

   4. Functions

        4.1. m_store([owner])
        4.2. m_dump([owner])

   5. Statistics

        5.1. stored_messages
        5.2. dumped_messages
        5.3. failed_messages
        5.4. dumped_reminders
        5.5. failed_reminders

   6. Installation and Running

        6.1. Kamailio config file

1. Overview

   This modules provides offline message storage for the Kamailio SIP
   Server Platform. It stores received messages for an offline user and
   sends them when the user becomes online.

   For each message, the modules stores "Request-URI" ("R-URI") only if it
   is a complete address of record ("username@hostname"), URI from "To"
   header, URI from "From" header, incoming time, expiration time, content
   type and body of the message. If "R-URI" is not an address of record
   (it might be the contact address for current SIP session) the URI from
   "To" header will be used as R-URI.

   When the expiration time passed, the message is discarded from
   database. Expiration time is computed based on incoming time and one of
   the module's parameters.

   Every time when a user registers with Kamailio, the module is looking
   in database for offline messages intended for that user. All of them
   will be sent to contact address provided in REGISTER request.

   It may happen that the SIP user to be registered use a SIP User Agent
   that has no support for MESSAGE requests. In this case the
   "failure_route" should be used to re-store the undelivered requests.

   Another functionality provided by the module is to send messages at a
   certain time -- the reminder functionality. Using config logic, a
   received message can be stored and delivered at a time specified while
   storing with the 'snd_time_avp'.

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, dbtext or other module that implements the
       "db" interface and provides support for storing/receiving data
       to/from a database system.
     * TM--transaction module-- used to send SIP requests.

2.2. External libraries or applications

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

3. Parameters

   3.1. db_url (string)
   3.2. db_table (string)
   3.3. from_address (string)
   3.4. contact_hdr (string)
   3.5. extra_hdrs (string)
   3.6. offline_message (string)
   3.7. content_type_hdr (string)
   3.8. reminder (string)
   3.9. outbound_proxy (string)
   3.10. expire_time (int)
   3.11. check_time (int)
   3.12. send_time (int)
   3.13. clean_period (int)
   3.14. use_contact (int)
   3.15. sc_mid (string)
   3.16. sc_from (string)
   3.17. sc_to (string)
   3.18. sc_uri_user (string)
   3.19. sc_uri_host (string)
   3.20. sc_body (string)
   3.21. sc_ctype (string)
   3.22. sc_exp_time (string)
   3.23. sc_inc_time (string)
   3.24. sc_snd_time (string)
   3.25. snd_time_avp (str)
   3.26. add_date (int)
   3.27. max_messages (int)
   3.28. add_contact (int)
   3.29. extra_hdrs_avp (str)

3.1. db_url (string)

   Database URL.

   Default value is "mysql://openser:openserrw@localhost/openser".

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

3.2. db_table (string)

   The name of table where to store the messages.

   Default value is "silo".

   Example 1.2. Set the "db_table" parameter
...
modparam("msilo", "db_table", "silo")
...

3.3. from_address (string)

   The SIP address used to inform users that destination of their message
   is not online and the message will be delivered next time when that
   user goes online. If the parameter is not set, the module will not send
   any notification. It can contain pseudo-variables.

   Default value is "NULL".

   Example 1.3. Set the "from_address" parameter
...
modparam("msilo", "from_address", "sip:registrar@example.org")
modparam("msilo", "from_address", "sip:$rU@example.org")
...

3.4. contact_hdr (string)

   The value of the Contact header (including header name and ending \r\n)
   to be added in notification messages. It can contain pseudo-variables.

   Default value is "NULL".

   Example 1.4. Set the "contact_hdr" parameter
...
modparam("msilo", "contact_hdr", "Contact: <sip:null@example.com>\r\n")
...

3.5. extra_hdrs (string)

   Extra headers (each ending with \r\n) to be added in messages sent from
   silo by m_dump. It can contain pseudo-variables.

   Default value is "NULL".

   Example 1.5. Set the "extra_hdrs" parameter
...
modparam("msilo", "extra_hdrs", "X-Extra: $tu\r\nY-Extra: foo\r\n")
...

3.6. offline_message (string)

   The body of the notification message. It can contain pseudo-variables.

   Default value is "NULL".

   Example 1.6. Set the "offline_message" parameter
...
modparam("msilo", "offline_message", "*** User $rU is offline!")
modparam("msilo", "offline_message", "<em>I am offline!</em>")
...

3.7. content_type_hdr (string)

   The value of the Content-Type header (including header name and ending
   \r\n) to be added in notification messages. It must reflect what the
   'offline_message' contains. It can contain pseudo-variables.

   Default value is "NULL".

   Example 1.7. Set the "content_type_hdr" parameter
...
modparam("msilo", "content_type_hdr", "Content-Type: text/plain\r\n")
modparam("msilo", "content_type_hdr", "Content-Type: text/html\r\n")
...

3.8. reminder (string)

   The SIP address used to send reminder messages. If this value is not
   set, the reminder feature is disabled.

   Default value is "NULL".

   Example 1.8. Set the "reminder" parameter
...
modparam("msilo", "reminder", "sip:registrar@example.org")
...

3.9. outbound_proxy (string)

   The SIP address used as next hop when sending the message. Very useful
   when using Kamailio with a domain name not in DNS, or when using a
   separate Kamailio instance for msilo processing. If not set, the
   message will be sent to the address in destination URI.

   Default value is "NULL".

   Example 1.9. Set the "outbound_proxy" parameter
...
modparam("msilo", "outbound_proxy", "sip:kamailio.org;transport=tcp")
...

3.10. expire_time (int)

   Expire time of stored messages - seconds. When this time passed, the
   message is silently discarded from database.

   Default value is "259200 (72 hours = 3 days)".

   Example 1.10. Set the "expire_time" parameter
...
modparam("msilo", "expire_time", 36000)
...

3.11. check_time (int)

   Timer interval to check if dumped messages are sent OK - seconds. The
   module keeps each request send by itself for a new online user and if
   the reply is 2xx then the message is deleted from database.

   Default value is "30".

   Example 1.11. Set the "check_time" parameter
...
modparam("msilo", "check_time", 10)
...

3.12. send_time (int)

   Timer interval in seconds to check if there are reminder messages. The
   module takes all reminder messages that must be sent at that moment or
   before that moment.

   If the value is 0, the reminder feature is disabled.

   Default value is "0".

   Example 1.12. Set the "send_time" parameter
...
modparam("msilo", "send_time", 60)
...

3.13. clean_period (int)

   Number of "check_time" cycles when to check if there are expired
   messages in database.

   Default value is "5".

   Example 1.13. Set the "clean_period" parameter
...
modparam("msilo", "clean_period", 3)
...

3.14. use_contact (int)

   Turns on/off the usage of the Contact address to send notification back
   to sender whose message is stored by MSILO.

   Default value is "1 (0 = off, 1 = on)".

   Example 1.14. Set the "use_contact" parameter
...
modparam("msilo", "use_contact", 0)
...

3.15. sc_mid (string)

   The name of the column in silo table, storing message id.

   Default value is "mid".

   Example 1.15. Set the "sc_mid" parameter
...
modparam("msilo", "sc_mid", "other_mid")
...

3.16. sc_from (string)

   The name of the column in silo table, storing the source address.

   Default value is "src_addr".

   Example 1.16. Set the "sc_from" parameter
...
modparam("msilo", "sc_from", "source_address")
...

3.17. sc_to (string)

   The name of the column in silo table, storing the destination address.

   Default value is "dst_addr".

   Example 1.17. Set the "sc_to" parameter
...
modparam("msilo", "sc_to", "destination_address")
...

3.18. sc_uri_user (string)

   The name of the column in silo table, storing the user name.

   Default value is "username".

   Example 1.18. Set the "sc_uri_user" parameter
...
modparam("msilo", "sc_uri_user", "user")
...

3.19. sc_uri_host (string)

   The name of the column in silo table, storing the domain.

   Default value is "domain".

   Example 1.19. Set the "sc_uri_host" parameter
...
modparam("msilo", "sc_uri_host", "domain")
...

3.20. sc_body (string)

   The name of the column storing the message body in silo table.

   Default value is "body".

   Example 1.20. Set the "sc_body" parameter
...
modparam("msilo", "sc_body", "message_body")
...

3.21. sc_ctype (string)

   The name of the column in silo table, storing content type.

   Default value is "ctype".

   Example 1.21. Set the "sc_ctype" parameter
...
modparam("msilo", "sc_ctype", "content_type")
...

3.22. sc_exp_time (string)

   The name of the column in silo table, storing the expire time of the
   message.

   Default value is "exp_time".

   Example 1.22. Set the "sc_exp_time" parameter
...
modparam("msilo", "sc_exp_time", "expire_time")
...

3.23. sc_inc_time (string)

   The name of the column in silo table, storing the incoming time of the
   message.

   Default value is "inc_time".

   Example 1.23. Set the "sc_inc_time" parameter
...
modparam("msilo", "sc_inc_time", "incoming_time")
...

3.24. sc_snd_time (string)

   The name of the column in silo table, storing the send time for the
   reminder.

   Default value is "snd_time".

   Example 1.24. Set the "sc_snd_time" parameter
...
modparam("msilo", "sc_snd_time", "send_reminder_time")
...

3.25. snd_time_avp (str)

   The name of an AVP which may contain the time when to sent the received
   message as reminder.The AVP is used ony by m_store().

   If the parameter is not set, the module does not look for this AVP. If
   the value is set to a valid AVP name, then the module expects in the
   AVP to be a time value in format YYYYMMDDHHMMSS (e.g., 20060101201500).

   Default value is "null".

   Example 1.25. Set the "snd_time_avp" parameter
...
modparam("msilo", "snd_time_avp", "$avp(i:123)")
...

3.26. add_date (int)

   Wheter to add as prefix the date when the message was stored.

   Default value is "1" (1==on/0==off).

   Example 1.26. Set the "add_date" parameter
...
modparam("msilo", "add_date", 0)
...

3.27. max_messages (int)

   Maximum number of stored message for an AoR. Value 0 equals to no
   limit.

   Default value is 0.

   Example 1.27. Set the "max_messages" parameter
...
modparam("msilo", "max_messages", 0)
...

3.28. add_contact (int)

   Wheter to add contact header to generated messages. The contact address
   is the From URI.

   Default value is "0" (1==on; 0==off as per RFC3428).

   Example 1.28. Set the "add_contact" parameter
...
modparam("msilo", "add_contact", 1)
...

3.29. extra_hdrs_avp (str)

   Name of an AVP which may contain extra headers that are stored with the
   message when m_store() is called. These extra headers (if any) are then
   included in MESSAGE request generated by m_dump().

   If the parameter is not set, m_store() does not look for extra headers
   from any AVP.

   Default value is "null".

   Example 1.29. Set the "extra_hdrs_avp" parameter
...
modparam("msilo", "extra_hdrs_avp", "$avp(msilo_extra_hdrs)")
...

4. Functions

   4.1. m_store([owner])
   4.2. m_dump([owner])

4.1. m_store([owner])

   The method stores certain parts of the current SIP request (it should
   be called when the request type is MESSAGE and the destination user is
   offline or his UA does not support MESSAGE requests). If the user is
   registered with a UA which does not support MESSAGE requests you should
   not use mode="0" if you have changed the request uri with the contact
   address of user's UA.

   Meaning of the parameters is as follows:
     * owner - is a string that must contain a SIP URI in whose inbox the
       message will be stored. It can have any pseudo variable. If "owner"
       is missing, the SIP address is taken from R-URI.

   This function can be used from REQUEST_ROUTE, FAILURE_ROUTE.

   Example 1.30. m_store usage
...
m_store();
m_store("$tu");
...

4.2. m_dump([owner])

   The method sends stored messages for the SIP user that is going to
   register to his actual contact address. The method should be called
   when a REGISTER request is received and the "Expire" header has a value
   greater than zero.

   Meaning of the parameters is as follows:
     * owner - is a string that must contain a SIP URI whose inbox will be
       dumped. It can have any pseudo variable. If "owner" is missing, the
       SIP address is taken from To URI.

   This function can be used from REQUEST_ROUTE.

   Example 1.31. m_dump usage
...
m_dump();
m_dump("$fu");
...

5. Statistics

   5.1. stored_messages
   5.2. dumped_messages
   5.3. failed_messages
   5.4. dumped_reminders
   5.5. failed_reminders

5.1. stored_messages

   The number of messages stored by msilo.

5.2. dumped_messages

   The number of dumped messages.

5.3. failed_messages

   The number of failed dumped messages.

5.4. dumped_reminders

   The number of dumped reminder messages.

5.5. failed_reminders

   The number of failed reminder messages.

6. Installation and Running

   6.1. Kamailio config file

6.1. Kamailio config file

   Next picture displays a sample usage of msilo.

   Example 1.32. Kamailio config script - sample msilo usage
...
# $Id$
#
# MSILO usage example
#
#


debug=9           # debug level (cmd line: -dddddddddd)
fork=no           # don't fork
log_stderror=yes  # log to stderr (cmd line: -E)


children=2        # number of children
check_via=no      # (cmd. line: -v)
dns=off           # (cmd. line: -r)
rev_dns=off       # (cmd. line: -R)
port=5060

listen=10.0.0.2   # listen address

# ------------------ module loading ----------------------------------
mpath="/usr/local/lib/kamailio/modules/"

loadmodule "textops.so"

loadmodule "sl.so"
loadmodule "mysql.so"
loadmodule "maxfwd.so"
loadmodule "msilo.so"
loadmodule "tm.so"
loadmodule "registrar.so"
loadmodule "usrloc.so"

# ----------------- setting module-specific parameters ---------------

# -- registrar params --

modparam("registrar", "default_expires", 120)

# -- registrar params --

modparam("usrloc", "db_mode", 0)

# -- msilo params --

modparam("msilo","db_url","mysql://openser:openserrw@localhost/openser")
modparam("msilo","from_address","sip:registrar@kamailio.org")
modparam("msilo","contact_hdr","Contact: registrar@192.168.1.2:5060;msilo=yes\r\
n")
modparam("msilo","content_type_hdr","Content-Type: text/plain\r\n")
modparam("msilo","offline_message","*** User $rU is offline!")

# -- tm params --

modparam("tm", "fr_timer", 10 )
modparam("tm", "fr_inv_timer", 15 )
modparam("tm", "wt_timer", 10 )


route{
    if ( !mf_process_maxfwd_header("10") )
    {
        sl_send_reply("483","To Many Hops");
        exit;
    };


    if (uri==myself) {
    {
        # for testing purposes, simply okay all REGISTERs
        if (method=="REGISTER")
        {
            save("location");
            log("REGISTER received -> dumping messages with MSILO\n");

            # MSILO - dumping user's offline messages
            if (m_dump())
            {
                log("MSILO: offline messages dumped - if they were\n");
            }else{
                log("MSILO: no offline messages dumped\n");
            };
            exit;
        };

        # domestic SIP destinations are handled using our USRLOC DB

        if(!lookup("location"))
        {
            if (! t_newtran())
            {
                sl_reply_error();
                exit;
            };
            # we do not care about anything else but MESSAGEs
            if (!method=="MESSAGE")
            {
                if (!t_reply("404", "Not found"))
                {
                    sl_reply_error();
                };
                exit;
            };
            log("MESSAGE received -> storing using MSILO\n");
            # MSILO - storing as offline message
            if (m_store("$ru"))
            {
                log("MSILO: offline message stored\n");
                if (!t_reply("202", "Accepted"))
                {
                    sl_reply_error();
                };
            }else{
                log("MSILO: offline message NOT stored\n");
                if (!t_reply("503", "Service Unavailable"))
                {
                    sl_reply_error();
                };
            };
            exit;
        };
        # if the downstream UA does not support MESSAGE requests
        # go to failure_route[1]
        t_on_failure("1");
        t_relay();
        exit;
    };

    # forward anything else
    t_relay();
}

failure_route[1] {
    # forwarding failed -- check if the request was a MESSAGE
    if (!method=="MESSAGE")
    {
        exit;
    };

    log(1,"MSILO:the downstream UA doesn't support MESSAGEs\n");
    # we have changed the R-URI with the contact address, ignore it now
    if (m_store("$ou"))
    {
        log("MSILO: offline message stored\n");
        t_reply("202", "Accepted");
    }else{
        log("MSILO: offline message NOT stored\n");
        t_reply("503", "Service Unavailable");
    };
}



...
