#!KAMAILIO

# Kamailio (OpenSER) SIP Server v3.2 - default configuration script

# - web: http://www.kamailio.org

# - git: http://sip-router.org

# Direct your questions about this file to: <sr-users@lists.sip-router.org>

# Refer to the Core CookBook at http://www.kamailio.org/dokuwiki/doku.php

# for an explanation of possible statements, functions and parameters.

# Several features can be enabled using '#!define WITH_FEATURE' directives:

# RAC: Uses dispatcher algorithm 10 to keep track of load distribution

# Use: kamctl start/stop/restart

####### Global Parameters #########

# Output goes to /var/log/syslog

# 5 gives too much output

# 3 is DEBUG, even this can go crazy

# 2 is INFO

# 1 is NOTICE

debug=3

#log_stderror=yes

memdbg=5

memlog=5

mem_summary=2

log_facility=LOG_LOCAL0

fork=yes

children=4

/* uncomment the next line to disable TCP (default on) */

disable_tcp=yes

/* uncomment the next line to disable the auto discovery of local aliases

based on reverse DNS on IPs (default on) */

auto_aliases=no

/* add local domain aliases */

alias=10.130.11.121:5060

/* uncomment and configure the following line if you want Kamailio to

bind on a specific interface/port/proto (default bind on all available) */

listen=udp:10.130.11.121:5060

/* port to listen to

* - can be specified more than once if needed to listen on many ports */

#port=5062

# life time of TCP connection when there is no traffic

# - a bit higher than registration expires to cope with UA behind NAT

tcp_connection_lifetime=3605

####### Modules Section ########

# set paths to location of modules (to sources or installation folders)

#!ifdef WITH_SRCPATH

mpath="modules_k:modules"

#!else

mpath="/usr/lib/kamailio/modules_k/:/usr/lib/kamailio/modules/"

#!endif

# For the kamctl interface

loadmodule "mi_fifo.so"

#loadmodule "kex.so"

# TM module is required for t_relay()

loadmodule "tm.so"

#loadmodule "tmx.so"

loadmodule "sl.so"

# RR module is required for loose_route() and record_route()

loadmodule "rr.so"

# PV is required for avp's for ALG10

loadmodule "pv.so"

# Used for mf_process_maxfwd_header()

loadmodule "maxfwd.so"

#loadmodule "usrloc.so"

#loadmodule "registrar.so"

# textops is required for is_method()

loadmodule "textops.so"

# For has_totag()

loadmodule "siputils.so"

# xlog is required for user xlog() formatted messages. Output goes to /var/log/messages

loadmodule "xlog.so"

# For sanity_check()

loadmodule "sanity.so"

#loadmodule "ctl.so"

#loadmodule "cfg_rpc.so"

#loadmodule "mi_rpc.so"

#loadmodule "acc.so"

# Added by RAC 2012-04-04: required for ds_select_dst() etc

loadmodule "dispatcher.so"

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

# ----- mi_fifo params -----

modparam("mi_fifo", "fifo_name", "/tmp/kamailio_fifo")

# Added by RAC 2012-04-04

# ----- dispatcher params -----

modparam("dispatcher", "list_file", "/etc/kamailio/dispatcher.list")

modparam("dispatcher", "force_dst", 0)

modparam("dispatcher", "use_default", 1)

modparam("dispatcher", "ds_ping_method", "OPTIONS")

# Only set ping reply codes that are acceptable. CE should only reply "200OK" if OK, "486 Busy Here" if not

modparam("dispatcher", "ds_ping_reply_codes", "class=2")

modparam("dispatcher", "ds_ping_from", "sip:proxy@10.130.11.121")

modparam("dispatcher", "ds_ping_interval", 20)

# In this mode only inactive destinations marked as probe-able will be pinged

modparam("dispatcher", "ds_probing_mode", 2)

modparam("dispatcher", "ds_probing_threshhold", 1)

modparam("dispatcher", "ds_hash_expire", 3600)

# Flag "2" MUST be set to use the AVPs listed below. If not set these will be <null>

modparam("dispatcher", "flags", 2)

modparam("dispatcher", "dst_avp", "$avp(dsdst)")

modparam("dispatcher", "grp_avp", "$avp(dsgrp)")

modparam("dispatcher", "cnt_avp", "$avp(dscnt)")

# For algorithm 10, call load distribution duid (in list_file), dstid_avp and ds_hash_size are required

modparam("dispatcher", "dstid_avp", "$avp(dsdstid)")

# Appears to be the size (2^ds_hash_size) of a hashtable for storing the state of individual sessions

# Presumably needs to be bigger than the number of concurrent sessions expected

# 2^12 = 4096

modparam("dispatcher", "ds_hash_size", 12)

####### Routing Logic ########

# ds_load_update():

# if it is a BYE or CANCEL - remove the load from destination address used to forward the INVITE

# if it is a reply to INVITE - set internal state to confirmed for call load structure when reply code is 2xx.

# ds_load_unset(): Remove the call load for the destination that routed the call.

# Main SIP request routing logic

# - processing of any incoming SIP request starts with this route

# - note: this is the same as route { ... }

request_route {

if (!mf_process_maxfwd_header("10")) {

sl_send_reply("483","Too Many Hops");

exit;

}

if(!sanity_check("1511", "7")) {

xlog("Malformed SIP message from $si:$sp\n");

exit;

}

# Added by RAC 2012-04-04

# Do not run ds_load_update() here; the reply to the orginal invite is sufficient to release the load

# loose_route() performs routing of in-dialog requests

if(has_totag()) {

if (loose_route()) {

# t_relay() relays a message statefully; forward() (stateless) easily gets in a muddle

if(!t_relay()) {

if (method == "ACK") xlog("L_ERR", "cid:$ci [$rm] [200-OK] t_relay failed\n");

else xlog("L_WARN", "cid:$ci Existing Transaction relay failed: [$rm] from($ft) [$fu] to($tt) [$tu]\n");

sl_reply_error();

}

else xlog("L_INFO", "cid:$ci Existing Transaction: [$rm] from($ft) [$fu] to($tt) [$tu]\n");

} else if (method == "ACK") {

if (t_check_trans()) {

# stateful ACK after 487 or 404

t_relay();

} else {

# ACK without transaction, ignore and discard

xlog("L_WARN", "cid:$ci Dropping ACK: from($ft) [$fu] to($tt) [$tu]\n");

}

} else {

sl_send_reply("404","Not here");

}

exit;

} # has_totag()

# dest set1, ALG10: call load distribution: least number of calls receives the next call

# Keeps a hash table of calls based on Call-ID to track call load per destination

if(ds_select_dst("1", "10"))

xlog("L_NOTICE", "cid:$ci Destination Selected: [$rm] from($ft) [$fu] routed to [sip:$tU@$dd:$dp] ($avp(dsdstid))\n");

else {

xlog("L_ERR", "No destinations available: [$rm] from [$fu]\n");

sl_send_reply("500","No destinations available");

drop();

exit();

}

# record_route() causes ALL messages to go through the proxy including ACKs and BYEs. Results in 16 SIP packets

# Without record_route(), after 200OK, the ACK and BYE is sent direct. Results in 11 SIP packets

# Must use record_route() with call load distribution, otherwise we will not know when a call is released

# and cannot account for it

record_route();

# With t_relay(), the proxy creates its own messages like 100 trying, instead of forwarding the original

# forward() is not recommended

t_relay();

}

event_route[dispatcher:dst-down] {

xlog("L_ERR", "Destination down: [$rm] $ru ($du)\n");

}

event_route[dispatcher:dst-up] {

xlog("L_NOTICE", "Destination up: [$rm] $ru\n");

}

# Added by RAC 2012-04-04: Update call loads on replies for ALG10.

# Default action is to reply upstream statelessly using Via headers

onreply_route {

xlog("L_INFO", "cid:$ci Reply: [$rm] [$rs-$rr] from($ft) [$fu] to($tt) [$tu]\n");

if(is_method("INVITE")) {

if(status=~"2[0-9][0-9]")

ds_load_update();

else if(status=~"[3-7][0-9][0-9]")

ds_load_unset();

}

else if(is_method("BYE")) {

ds_load_update();

}

Bad debug trace (CE to IVRSim):

NOTE: Phone numbers have been changed

...

Apr 6 14:10:29 UKCY-VM-LINUX199 /usr/sbin/kamailio[28277]: DEBUG: <core> [parser/msg_parser.c:628]: SIP Request:

Apr 6 14:10:29 UKCY-VM-LINUX199 /usr/sbin/kamailio[28277]: DEBUG: <core> [parser/msg_parser.c:630]: method: <ACK>

Apr 6 14:10:29 UKCY-VM-LINUX199 /usr/sbin/kamailio[28277]: DEBUG: <core> [parser/msg_parser.c:632]: uri: <sip:18000005835@10.130.11.121>

Apr 6 14:10:29 UKCY-VM-LINUX199 /usr/sbin/kamailio[28277]: DEBUG: <core> [parser/msg_parser.c:634]: version: <SIP/2.0>

Apr 6 14:10:29 UKCY-VM-LINUX199 /usr/sbin/kamailio[28277]: DEBUG: <core> [parser/parse_to.c:174]: DEBUG: add_param: tag=f8a6698-0-13c4-50022-16d0d4-103b30a3-16d0d4

Apr 6 14:10:29 UKCY-VM-LINUX199 /usr/sbin/kamailio[28277]: DEBUG: <core> [parser/parse_to.c:803]: end of header reached, state=29

Apr 6 14:10:29 UKCY-VM-LINUX199 /usr/sbin/kamailio[28277]: DEBUG: <core> [parser/msg_parser.c:187]: DEBUG: get_hdr_field: <To> [81]; uri=[sip:18000005835@10.130.11.121]

Apr 6 14:10:29 UKCY-VM-LINUX199 /usr/sbin/kamailio[28277]: DEBUG: <core> [parser/msg_parser.c:189]: DEBUG: to body [<sip:18000005835@10.130.11.121>]

Apr 6 14:10:29 UKCY-VM-LINUX199 /usr/sbin/kamailio[28277]: DEBUG: <core> [parser/msg_parser.c:167]: get_hdr_field: cseq <CSeq>: <1> <ACK>

Apr 6 14:10:29 UKCY-VM-LINUX199 /usr/sbin/kamailio[28277]: DEBUG: <core> [parser/parse_via.c:1288]: Found param type 232, <branch> = <z9hG4bK-182890-5e5e75ec-235d6d1e>; state=16

Apr 6 14:10:29 UKCY-VM-LINUX199 /usr/sbin/kamailio[28277]: DEBUG: <core> [parser/parse_via.c:2563]: end of header reached, state=5

Apr 6 14:10:29 UKCY-VM-LINUX199 /usr/sbin/kamailio[28277]: DEBUG: <core> [parser/msg_parser.c:515]: parse_headers: Via found, flags=2

Apr 6 14:10:29 UKCY-VM-LINUX199 /usr/sbin/kamailio[28277]: DEBUG: <core> [parser/msg_parser.c:517]: parse_headers: this is the first via

Apr 6 14:10:29 UKCY-VM-LINUX199 /usr/sbin/kamailio[28277]: DEBUG: <core> [receive.c:146]: After parse_msg...

Apr 6 14:10:29 UKCY-VM-LINUX199 /usr/sbin/kamailio[28277]: DEBUG: <core> [receive.c:187]: preparing to run routing scripts...

Apr 6 14:10:29 UKCY-VM-LINUX199 /usr/sbin/kamailio[28277]: DEBUG: sl [sl_funcs.c:307]: DEBUG : sl_filter_ACK: to late to be a local ACK!

Apr 6 14:10:29 UKCY-VM-LINUX199 /usr/sbin/kamailio[28277]: DEBUG: maxfwd [mf_funcs.c:85]: value = 70

Apr 6 14:10:29 UKCY-VM-LINUX199 /usr/sbin/kamailio[28277]: DEBUG: <core> [parser/msg_parser.c:201]: DEBUG: get_hdr_body : content_length=0

Apr 6 14:10:29 UKCY-VM-LINUX199 /usr/sbin/kamailio[28277]: DEBUG: <core> [parser/msg_parser.c:103]: found end of header

Apr 6 14:10:29 UKCY-VM-LINUX199 /usr/sbin/kamailio[28277]: DEBUG: <core> [parser/parse_to.c:174]: DEBUG: add_param: tag=774ee38-650b820a-13c4-50022-182890-4de156df-182890

Apr 6 14:10:29 UKCY-VM-LINUX199 /usr/sbin/kamailio[28277]: DEBUG: <core> [parser/parse_to.c:803]: end of header reached, state=29

Apr 6 14:10:29 UKCY-VM-LINUX199 /usr/sbin/kamailio[28277]: DEBUG: sanity [mod_sanity.c:251]: sanity checks result: 1

Apr 6 14:10:29 UKCY-VM-LINUX199 /usr/sbin/kamailio[28277]: DEBUG: siputils [checks.c:107]: totag found

Apr 6 14:10:29 UKCY-VM-LINUX199 /usr/sbin/kamailio[28277]: DEBUG: rr [loose.c:85]: is_preloaded: No

Apr 6 14:10:29 UKCY-VM-LINUX199 /usr/sbin/kamailio[28277]: DEBUG: <core> [socket_info.c:502]: grep_sock_info - checking if host==us: 13==13 && [10.130.11.121] == [10.130.11.121]

Apr 6 14:10:29 UKCY-VM-LINUX199 /usr/sbin/kamailio[28277]: DEBUG: <core> [socket_info.c:505]: grep_sock_info - checking if port 5060 matches port 5060

Apr 6 14:10:29 UKCY-VM-LINUX199 /usr/sbin/kamailio[28277]: DEBUG: rr [loose.c:594]: Next hop: 'sip:10.130.11.121;lr;ftag=774ee38-650b820a-13c4-50022-182890-4de156df-182890' is loose router

Apr 6 14:10:29 UKCY-VM-LINUX199 /usr/sbin/kamailio[28277]: DEBUG: rr [loose.c:644]: The last route URI: 'sip:10.130.11.121;lr;ftag=774ee38-650b820a-13c4-50022-182890-4de156df-182890'

Apr 6 14:10:29 UKCY-VM-LINUX199 /usr/sbin/kamailio[28277]: DEBUG: tm [t_lookup.c:1379]: DEBUG: t_newtran: msg id=6 , global msg id=5 , T on entrance=(nil)

Apr 6 14:10:29 UKCY-VM-LINUX199 /usr/sbin/kamailio[28277]: DEBUG: tm [t_lookup.c:527]: t_lookup_request: start searching: hash=37904, isACK=1

Apr 6 14:10:29 UKCY-VM-LINUX199 /usr/sbin/kamailio[28277]: DEBUG: tm [t_lookup.c:485]: DEBUG: RFC3261 transaction matching failed

Apr 6 14:10:29 UKCY-VM-LINUX199 /usr/sbin/kamailio[28277]: DEBUG: tm [t_lookup.c:709]: DEBUG: t_lookup_request: no transaction found

Apr 6 14:10:29 UKCY-VM-LINUX199 /usr/sbin/kamailio[28277]: DEBUG: tm [t_funcs.c:315]: SER: forwarding ACK statelessly

Apr 6 14:10:29 UKCY-VM-LINUX199 /usr/sbin/kamailio[28277]: DEBUG: <core> [msg_translator.c:204]: check_via_address(10.130.11.101, 10.130.11.101, 0)

Apr 6 14:10:29 UKCY-VM-LINUX199 /usr/sbin/kamailio[28277]: DEBUG: <core> [forward.c:601]: Sending:#012ACK sip:10.130.11.121;lr;ftag=774ee38-650b820a-13c4-50022-182890-4de156df-182890 SIP/2.0#015#012From: <sip:441865000101@10.130.11.101>;tag=774ee38-650b820a-13c4-50022-182890-4de156df-182890#015#012To: <sip:18000005835@10.130.11.121>;tag=f8a6698-0-13c4-50022-16d0d4-103b30a3-16d0d4#015#012Call-ID: fb041312-da6d-4fb7-bfee-32677fbab37b#015#012CSeq: 1 ACK#015#012Via: SIP/2.0/UDP 10.130.11.121;branch=z9hG4bKcydzigwkX#015#012Via: SIP/2.0/UDP 10.130.11.101:5060;branch=z9hG4bK-182890-5e5e75ec-235d6d1e#015#012Max-Forwards: 69#015#012Contact: <sip:441865000101@10.130.11.101>#015#012Allow-Events: refer#015#012Content-Length: 0#015#012#015#012.

Apr 6 14:10:29 UKCY-VM-LINUX199 /usr/sbin/kamailio[28277]: DEBUG: <core> [forward.c:603]: orig. len=550, new_len=566, proto=1