[SR-Users] core parsing of SIP message failed

Seyyed Soroosh Hosseinalipour soorosh_abi at hotmail.com
Tue Mar 22 19:13:42 CET 2022


ITNOA

Description

I try to connect Kamailio and Freeswitch together, and initiate call from Zoiper5 soft phone through Kamailio

My Kamailio config is below

#!ifdef ACCDB_COMMENT

  ALTER TABLE acc ADD COLUMN src_user VARCHAR(64) NOT NULL DEFAULT '';

  ALTER TABLE acc ADD COLUMN src_domain VARCHAR(128) NOT NULL DEFAULT '';

  ALTER TABLE acc ADD COLUMN src_ip varchar(64) NOT NULL default '';

  ALTER TABLE acc ADD COLUMN dst_ouser VARCHAR(64) NOT NULL DEFAULT '';

  ALTER TABLE acc ADD COLUMN dst_user VARCHAR(64) NOT NULL DEFAULT '';

  ALTER TABLE acc ADD COLUMN dst_domain VARCHAR(128) NOT NULL DEFAULT '';

  ALTER TABLE missed_calls ADD COLUMN src_user VARCHAR(64) NOT NULL DEFAULT '';

  ALTER TABLE missed_calls ADD COLUMN src_domain VARCHAR(128) NOT NULL DEFAULT '';

  ALTER TABLE missed_calls ADD COLUMN src_ip varchar(64) NOT NULL default '';

  ALTER TABLE missed_calls ADD COLUMN dst_ouser VARCHAR(64) NOT NULL DEFAULT '';

  ALTER TABLE missed_calls ADD COLUMN dst_user VARCHAR(64) NOT NULL DEFAULT '';

  ALTER TABLE missed_calls ADD COLUMN dst_domain VARCHAR(128) NOT NULL DEFAULT '';

#!endif



####### Include Local Config If Exists #########

import_file "kamailio-local.cfg"



####### Defined Values #########



# *** Value defines - IDs used later in config

#!ifdef WITH_DEBUG

#!define DBGLEVEL 3

#!else

#!define DBGLEVEL 2

#!endif



#!ifdef WITH_MYSQL

# - database URL - used to connect to database server by modules such

#       as: auth_db, acc, usrloc, a.s.o.

#!trydef DBURL "mysql://kamailio:kamailiorw@localhost/kamailio"

#!endif



#!ifdef WITH_MULTIDOMAIN

# - the value for 'use_domain' parameters

#!define MULTIDOMAIN 1

#!else

#!define MULTIDOMAIN 0

#!endif



# - flags

#   FLT_ - per transaction (message) flags

#        FLB_ - per branch flags

#!define FLT_ACC 1

#!define FLT_ACCMISSED 2

#!define FLT_ACCFAILED 3

#!define FLT_NATS 5



#!define FLB_NATB 6

#!define FLB_NATSIPPING 7



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



/* LOG Levels: 3=DBG, 2=INFO, 1=NOTICE, 0=WARN, -1=ERR, ... */

debug=DBGLEVEL



/* set to 'yes' to print log messages to terminal or use '-E' cli option */

log_stderror=yes



memdbg=5

memlog=5



log_facility=LOG_LOCAL0

log_prefix="{$mt $hdr(CSeq) $ci} "



/* number of SIP routing processes for each UDP socket

 * - value inherited by tcp_children and sctp_children when not set explicitely */

children=8



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

disable_tcp=yes



/* number of SIP routing processes for all TCP/TLS sockets */

# tcp_children=8



/* 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 - it can be set many times */

# alias="sip.mydomain.com"



/* listen sockets - if none set, Kamailio binds to all local IP addresses

 * - basic prototype (full prototype can be found in Wiki - Core Cookbook):

 *      listen=[proto]:[localip]:[lport] advertise [publicip]:[pport]

 * - it can be set many times to add more sockets to listen to */

listen=udp:172.28.72.99:5060 advertise 172.28.72.99:5060

#listen=tcp:172.28.72.99:5060



/* 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



/* upper limit for TCP connections (it includes the TLS connections) */

tcp_max_connections=2048



#!ifdef WITH_JSONRPC

tcp_accept_no_cl=yes

#!endif



#!ifdef WITH_TLS

enable_tls=no



/* upper limit for TLS connections */

tls_max_connections=2048

#!endif



/* set it to yes to enable sctp and load sctp.so module */

enable_sctp=no



####### Custom Parameters #########



/* These parameters can be modified runtime via RPC interface

 * - see the documentation of 'cfg_rpc' module.

 *

 * Format: group.id = value 'desc' description

 * Access: $sel(cfg_get.group.id) or @cfg_get.group.id */



#!ifdef WITH_PSTN

/* PSTN GW Routing

 *

 * - pstn.gw_ip: valid IP or hostname as string value, example:

 * pstn.gw_ip = "10.0.0.101" desc "My PSTN GW Address"

 *

 * - by default is empty to avoid misrouting */

pstn.gw_ip = "" desc "PSTN GW Address"

pstn.gw_port = "" desc "PSTN GW Port"

#!endif



#!ifdef WITH_VOICEMAIL

/* VoiceMail Routing on offline, busy or no answer

 *

 * - by default Voicemail server IP is empty to avoid misrouting */

voicemail.srv_ip = "" desc "VoiceMail IP Address"

voicemail.srv_port = "5060" desc "VoiceMail Port"

#!endif



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



/* set paths to location of modules */

# mpath="/usr/lib/x86_64-linux-gnu/kamailio/modules/"



#!ifdef WITH_MYSQL

loadmodule "db_mysql.so"

#!endif



#!ifdef WITH_JSONRPC

loadmodule "xhttp.so"

#!endif

loadmodule "jsonrpcs.so"

loadmodule "kex.so"

loadmodule "corex.so"

loadmodule "tm.so"

loadmodule "tmx.so"

loadmodule "sl.so"

loadmodule "rr.so"

loadmodule "pv.so"

loadmodule "maxfwd.so"

loadmodule "usrloc.so"

loadmodule "registrar.so"

loadmodule "textops.so"

loadmodule "textopsx.so"

loadmodule "siputils.so"

loadmodule "xlog.so"

loadmodule "sanity.so"

loadmodule "ctl.so"

loadmodule "cfg_rpc.so"

loadmodule "acc.so"

loadmodule "counters.so"



#!ifdef WITH_AUTH

loadmodule "auth.so"

loadmodule "auth_db.so"

#!ifdef WITH_IPAUTH

loadmodule "permissions.so"

#!endif

#!endif



#!ifdef WITH_ALIASDB

loadmodule "alias_db.so"

#!endif



#!ifdef WITH_SPEEDDIAL

loadmodule "speeddial.so"

#!endif



#!ifdef WITH_MULTIDOMAIN

loadmodule "domain.so"

#!endif



#!ifdef WITH_PRESENCE

loadmodule "presence.so"

loadmodule "presence_xml.so"

#!endif



#!ifdef WITH_NAT

loadmodule "nathelper.so"

#!ifdef WITH_RTPENGINE

loadmodule "rtpengine.so"

#!else

loadmodule "rtpproxy.so"

#!endif

#!endif



#!ifdef WITH_TLS

loadmodule "tls.so"

#!endif



#!ifdef WITH_ANTIFLOOD

loadmodule "htable.so"

loadmodule "pike.so"

#!endif



#!ifdef WITH_DEBUG

loadmodule "debugger.so"

#!endif



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





# ----- jsonrpcs params -----

modparam("jsonrpcs", "pretty_format", 1)

/* set the path to RPC fifo control file */

# modparam("jsonrpcs", "fifo_name", "/run/kamailio/kamailio_rpc.fifo")

/* set the path to RPC unix socket control file */

# modparam("jsonrpcs", "dgram_socket", "/run/kamailio/kamailio_rpc.sock")

#!ifdef WITH_JSONRPC

modparam("jsonrpcs", "transport", 7)

#!endif



# ----- ctl params -----

/* set the path to RPC unix socket control file */

# modparam("ctl", "binrpc", "unix:/run/kamailio/kamailio_ctl")



# ----- sanity params -----

modparam("sanity", "autodrop", 0)



# ----- tm params -----

# auto-discard branches from previous serial forking leg

modparam("tm", "failure_reply_mode", 3)

# default retransmission timeout: 30sec

modparam("tm", "fr_timer", 30000)

# default invite retransmission timeout after 1xx: 120sec

modparam("tm", "fr_inv_timer", 120000)



# ----- rr params -----

# set next param to 1 to add value to ;lr param (helps with some UAs)

modparam("rr", "enable_full_lr", 0)

# do not append from tag to the RR (no need for this script)

modparam("rr", "append_fromtag", 0)



# ----- registrar params -----

modparam("registrar", "method_filtering", 1)

/* uncomment the next line to disable parallel forking via location */

# modparam("registrar", "append_branches", 0)

/* uncomment the next line not to allow more than 10 contacts per AOR */

# modparam("registrar", "max_contacts", 10)

/* max value for expires of registrations */

modparam("registrar", "max_expires", 3600)

/* set it to 1 to enable GRUU */

modparam("registrar", "gruu_enabled", 0)

/* set it to 0 to disable Path handling */

modparam("registrar", "use_path", 1)

/* save Path even if not listed in Supported header */

modparam("registrar", "path_mode", 0)



# ----- acc params -----

/* what special events should be accounted ? */

modparam("acc", "early_media", 0)

modparam("acc", "report_ack", 0)

modparam("acc", "report_cancels", 0)

/* by default ww do not adjust the direct of the sequential requests.

 * if you enable this parameter, be sure the enable "append_fromtag"

 * in "rr" module */

modparam("acc", "detect_direction", 0)

/* account triggers (flags) */

modparam("acc", "log_flag", FLT_ACC)

modparam("acc", "log_missed_flag", FLT_ACCMISSED)

modparam("acc", "log_extra",

         "src_user=$fU;src_domain=$fd;src_ip=$si;"

         "dst_ouser=$tU;dst_user=$rU;dst_domain=$rd")

modparam("acc", "failed_transaction_flag", FLT_ACCFAILED)

/* enhanced DB accounting */

#!ifdef WITH_ACCDB

modparam("acc", "db_flag", FLT_ACC)

modparam("acc", "db_missed_flag", FLT_ACCMISSED)

modparam("acc", "db_url", DBURL)

modparam("acc", "db_extra",

         "src_user=$fU;src_domain=$fd;src_ip=$si;"

         "dst_ouser=$tU;dst_user=$rU;dst_domain=$rd")

#!endif



# ----- usrloc params -----

modparam("usrloc", "timer_interval", 60)

modparam("usrloc", "timer_procs", 1)

modparam("usrloc", "use_domain", MULTIDOMAIN)

/* enable DB persistency for location entries */

#!ifdef WITH_USRLOCDB

modparam("usrloc", "db_url", DBURL)

modparam("usrloc", "db_mode", 2)

#!endif



# ----- auth_db params -----

#!ifdef WITH_AUTH

modparam("auth_db", "db_url", DBURL)

modparam("auth_db", "calculate_ha1", yes)

modparam("auth_db", "password_column", "password")

modparam("auth_db", "load_credentials", "")

modparam("auth_db", "use_domain", MULTIDOMAIN)



# ----- permissions params -----

#!ifdef WITH_IPAUTH

modparam("permissions", "db_url", DBURL)

modparam("permissions", "db_mode", 1)

#!endif



#!endif



# ----- alias_db params -----

#!ifdef WITH_ALIASDB

modparam("alias_db", "db_url", DBURL)

modparam("alias_db", "use_domain", MULTIDOMAIN)

#!endif



# ----- speeddial params -----

#!ifdef WITH_SPEEDDIAL

modparam("speeddial", "db_url", DBURL)

modparam("speeddial", "use_domain", MULTIDOMAIN)

#!endif



# ----- domain params -----

#!ifdef WITH_MULTIDOMAIN

modparam("domain", "db_url", DBURL)

/* register callback to match myself condition with domains list */

modparam("domain", "register_myself", 1)

#!endif



#!ifdef WITH_PRESENCE

# ----- presence params -----

modparam("presence", "db_url", DBURL)



# ----- presence_xml params -----

modparam("presence_xml", "db_url", DBURL)

modparam("presence_xml", "force_active", 1)

#!endif



#!ifdef WITH_NAT

#!ifdef WITH_RTPENGINE

# ----- rtpengine params -----

modparam("rtpengine", "rtpengine_sock", "udp:127.0.0.1:2223")

#!else

# ----- rtpproxy params -----

modparam("rtpproxy", "rtpproxy_sock", "udp:127.0.0.1:7722")

#!endif

# ----- nathelper params -----

modparam("nathelper", "natping_interval", 30)

modparam("nathelper", "ping_nated_only", 1)

modparam("nathelper", "sipping_bflag", FLB_NATSIPPING)

modparam("nathelper", "sipping_from", "sip:pinger at kamailio.org")



# params needed for NAT traversal in other modules

modparam("nathelper|registrar", "received_avp", "$avp(RECEIVED)")

modparam("usrloc", "nat_bflag", FLB_NATB)

#!endif



#!ifdef WITH_TLS

# ----- tls params -----

modparam("tls", "config", "/etc/kamailio/tls.cfg")

#!endif



#!ifdef WITH_ANTIFLOOD

# ----- pike params -----

modparam("pike", "sampling_time_unit", 2)

modparam("pike", "reqs_density_per_unit", 16)

modparam("pike", "remove_latency", 4)



# ----- htable params -----

/* ip ban htable with autoexpire after 5 minutes */

modparam("htable", "htable", "ipban=>size=8;autoexpire=300;")

#!endif



#!ifdef WITH_DEBUG

# ----- debugger params -----

modparam("debugger", "cfgtrace", 1)

modparam("debugger", "log_level_name", "exec")

#!endif



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





/* Main SIP request routing logic

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

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

request_route {



         # per request initial checks

         # route(REQINIT);



         # NAT detection

         #route(NATDETECT);



         # CANCEL processing

         if (is_method("CANCEL")) {

                 if (t_check_trans()) {

                          route(RELAY);

                 }

                 exit;

         }



         # handle retransmissions

         if (!is_method("ACK")) {

                 if(t_precheck_trans()) {

                          t_check_trans();

                          exit;

                 }

                 t_check_trans();

         }



         if (is_method("REGISTER")) {

                 xdbg("request from gggggggggggggggggggggggggggggggggggggggggg - $rm from $fu (IP:$si:$sp)\n");

        }

         rewritehostport("172.28.69.52:5060");



         # handle requests within SIP dialogs

         # route(WITHINDLG);



         ### only initial requests (no To tag)



         # authentication

         # route(AUTH);



         # record routing for dialog forming requests (in case they are routed)

         # - remove preloaded route headers

         #remove_hf("Route");

         #if (is_method("INVITE|SUBSCRIBE")) {

         #        record_route();

         #}



         # account only INVITEs

         #if (is_method("INVITE")) {

         #        setflag(FLT_ACC); # do accounting

         #}



         # dispatch requests to foreign domains

         #route(SIPOUT);



         ### requests for my local domains



         # handle presence related requests

         #route(PRESENCE);



         # handle registrations

         # route(REGISTRAR);



         #if ($rU==$null) {

         #        # request with no Username in RURI

         #        sl_send_reply("484","Address Incomplete");

         #        exit;

         #}



         # dispatch destinations to PSTN

         #route(PSTN);



         # user location service

         #route(LOCATION);

}



# Wrapper for relaying requests

route[RELAY] {



         # enable additional event routes for forwarded requests

         # - serial forking, RTP relaying handling, a.s.o.

         if (is_method("INVITE|BYE|SUBSCRIBE|UPDATE")) {

                 if(!t_is_set("branch_route")) t_on_branch("MANAGE_BRANCH");

         }

         if (is_method("INVITE|SUBSCRIBE|UPDATE")) {

                 if(!t_is_set("onreply_route")) t_on_reply("MANAGE_REPLY");

         }

         if (is_method("INVITE")) {

                 if(!t_is_set("failure_route")) t_on_failure("MANAGE_FAILURE");

         }



         if (!t_relay()) {

                 sl_reply_error();

         }

         exit;

}



# Per SIP request initial checks

route[REQINIT] {

         # no connect for sending replies

         set_reply_no_connect();

         # enforce symmetric signaling

         # - send back replies to the source address of request

         force_rport();



#!ifdef WITH_ANTIFLOOD

         # flood detection from same IP and traffic ban for a while

         # be sure you exclude checking trusted peers, such as pstn gateways

         # - local host excluded (e.g., loop to self)

         if(src_ip!=myself) {

                 if($sht(ipban=>$si)!=$null) {

                          # ip is already blocked

                          xdbg("request from blocked IP - $rm from $fu (IP:$si:$sp)\n");

                          exit;

                 }

                 if (!pike_check_req()) {

                          xlog("L_ALERT","ALERT: pike blocking $rm from $fu (IP:$si:$sp)\n");

                          $sht(ipban=>$si) = 1;

                          exit;

                 }

         }

#!endif

         if($ua =~ "friendly|scanner|sipcli|sipvicious|VaxSIPUserAgent") {

                 # silent drop for scanners - uncomment next line if want to reply

                 # sl_send_reply("200", "OK");

                 exit;

         }



         if (!mf_process_maxfwd_header("10")) {

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

                 exit;

         }



         if(is_method("OPTIONS") && uri==myself && $rU==$null) {

                 sl_send_reply("200","Keepalive");

                 exit;

         }



         if(!sanity_check("17895", "7")) {

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

                 exit;

         }

}



# Handle requests within SIP dialogs

route[WITHINDLG] {

         if (!has_totag()) return;



         # sequential request withing a dialog should

         # take the path determined by record-routing

         if (loose_route()) {

                 route(DLGURI);

                 if (is_method("BYE")) {

                          setflag(FLT_ACC); # do accounting ...

                          setflag(FLT_ACCFAILED); # ... even if the transaction fails

                 } else if ( is_method("ACK") ) {

                          # ACK is forwarded statelessly

                          route(NATMANAGE);

                 } else if ( is_method("NOTIFY") ) {

                          # Add Record-Route for in-dialog NOTIFY as per RFC 6665.

                          record_route();

                 }

                 route(RELAY);

                 exit;

         }



         if (is_method("SUBSCRIBE") && uri == myself) {

                 # in-dialog subscribe requests

                 route(PRESENCE);

                 exit;

         }

         if ( is_method("ACK") ) {

                 if ( t_check_trans() ) {

                          # no loose-route, but stateful ACK;

                          # must be an ACK after a 487

                          # or e.g. 404 from upstream server

                          route(RELAY);

                          exit;

                 } else {

                          # ACK without matching transaction ... ignore and discard

                          exit;

                 }

         }

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

         exit;

}



# Handle SIP registrations

route[REGISTRAR] {

         if (!is_method("REGISTER")) return;



         if(isflagset(FLT_NATS)) {

                 setbflag(FLB_NATB);

#!ifdef WITH_NATSIPPING

                 # do SIP NAT pinging

                 setbflag(FLB_NATSIPPING);

#!endif

         }

         if (!save("location")) {

                 sl_reply_error();

         }

         exit;

}



# User location service

route[LOCATION] {



#!ifdef WITH_SPEEDDIAL

         # search for short dialing - 2-digit extension

         if($rU=~"^[0-9][0-9]$") {

                 if(sd_lookup("speed_dial")) {

                          route(SIPOUT);

                 }

         }

#!endif



#!ifdef WITH_ALIASDB

         # search in DB-based aliases

         if(alias_db_lookup("dbaliases")) {

                 route(SIPOUT);

         }

#!endif



         $avp(oexten) = $rU;

         if (!lookup("location")) {

                 $var(rc) = $rc;

                 route(TOVOICEMAIL);

                 t_newtran();

                 switch ($var(rc)) {

                          case -1:

                          case -3:

                                   send_reply("404", "Not Found");

                                   exit;

                          case -2:

                                   send_reply("405", "Method Not Allowed");

                                   exit;

                 }

         }



         # when routing via usrloc, log the missed calls also

         if (is_method("INVITE")) {

                 setflag(FLT_ACCMISSED);

         }



         route(RELAY);

         exit;

}



# Presence server processing

route[PRESENCE] {

         if(!is_method("PUBLISH|SUBSCRIBE")) return;



         if(is_method("SUBSCRIBE") && $hdr(Event)=="message-summary") {

                 route(TOVOICEMAIL);

                 # returns here if no voicemail server is configured

                 sl_send_reply("404", "No voicemail service");

                 exit;

         }



#!ifdef WITH_PRESENCE

#!ifdef WITH_MSGREBUILD

         # apply changes in case the request headers or body were modified

         msg_apply_changes();

#!endif

         if (!t_newtran()) {

                 sl_reply_error();

                 exit;

         }



         if(is_method("PUBLISH")) {

                 handle_publish();

                 t_release();

         } else if(is_method("SUBSCRIBE")) {

                 handle_subscribe();

                 t_release();

         }

         exit;

#!endif



         # if presence enabled, this part will not be executed

         if (is_method("PUBLISH") || $rU==$null) {

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

                 exit;

         }

         return;

}



# IP authorization and user authentication

route[AUTH] {

#!ifdef WITH_AUTH



#!ifdef WITH_IPAUTH

         if((!is_method("REGISTER")) && allow_source_address()) {

                 # source IP allowed

                 return;

         }

#!endif



         if (is_method("REGISTER") || from_uri==myself) {

                 # authenticate requests

                 if (!auth_check("$fd", "subscriber", "1")) {

                          auth_challenge("$fd", "0");

                          exit;

                 }

                 # user authenticated - remove auth header

                 if(!is_method("REGISTER|PUBLISH"))

                          consume_credentials();

         }

         # if caller is not local subscriber, then check if it calls

         # a local destination, otherwise deny, not an open relay here

         if (from_uri!=myself && uri!=myself) {

                 sl_send_reply("403","Not relaying");

                 exit;

         }



#!else



         # authentication not enabled - do not relay at all to foreign networks

         if(uri!=myself) {

                 sl_send_reply("403","Not relaying");

                 exit;

         }



#!endif

         return;

}



# Caller NAT detection

route[NATDETECT] {

#!ifdef WITH_NAT

         if (nat_uac_test("19")) {

                 if (is_method("REGISTER")) {

                          fix_nated_register();

                 } else {

                          if(is_first_hop()) {

                                   set_contact_alias();

                          }

                 }

                 setflag(FLT_NATS);

         }

#!endif

         return;

}



# RTPProxy control and signaling updates for NAT traversal

route[NATMANAGE] {

#!ifdef WITH_NAT

         if (is_request()) {

                 if(has_totag()) {

                          if(check_route_param("nat=yes")) {

                                   setbflag(FLB_NATB);

                          }

                 }

         }

         if (!(isflagset(FLT_NATS) || isbflagset(FLB_NATB))) return;



#!ifdef WITH_RTPENGINE

         if(nat_uac_test("8")) {

                 rtpengine_manage("replace-origin replace-session-connection");

         } else {

                 rtpengine_manage("trust-address replace-origin replace-session-connection");

         }

#!else

         if(nat_uac_test("8")) {

                 rtpproxy_manage("co");

         } else {

                 rtpproxy_manage("cor");

         }

#!endif



         if (is_request()) {

                 if (!has_totag()) {

                          if(t_is_branch_route()) {

                                   add_rr_param(";nat=yes");

                          }

                 }

         }

         if (is_reply()) {

                 if(isbflagset(FLB_NATB)) {

                          if(is_first_hop())

                                   set_contact_alias();

                 }

         }



         if(isbflagset(FLB_NATB)) {

                 # no connect message in a dialog involving NAT traversal

                 if (is_request()) {

                          if(has_totag()) {

                                   set_forward_no_connect();

                          }

                 }

         }

#!endif

         return;

}



# URI update for dialog requests

route[DLGURI] {

#!ifdef WITH_NAT

         if(!isdsturiset()) {

                 handle_ruri_alias();

         }

#!endif

         return;

}



# Routing to foreign domains

route[SIPOUT] {

         if (uri==myself) return;



         append_hf("P-Hint: outbound\r\n");

         route(RELAY);

         exit;

}



# PSTN GW routing

route[PSTN] {

#!ifdef WITH_PSTN

         # check if PSTN GW IP is defined

         if (strempty($sel(cfg_get.pstn.gw_ip))) {

                 xlog("SCRIPT: PSTN routing enabled but pstn.gw_ip not defined\n");

                 return;

         }



         # route to PSTN dialed numbers starting with '+' or '00'

         #     (international format)

         # - update the condition to match your dialing rules for PSTN routing

         if(!($rU=~"^(\+|00)[1-9][0-9]{3,20}$")) return;



         # only local users allowed to call

         if(from_uri!=myself) {

                 sl_send_reply("403", "Not Allowed");

                 exit;

         }



         # normalize target number for pstn gateway

         # - convert leading 00 to +

         if (starts_with("$rU", "00")) {

                 strip(2);

                 prefix("+");

         }



         if (strempty($sel(cfg_get.pstn.gw_port))) {

                 $ru = "sip:" + $rU + "@" + $sel(cfg_get.pstn.gw_ip);

         } else {

                 $ru = "sip:" + $rU + "@" + $sel(cfg_get.pstn.gw_ip) + ":"

                                            + $sel(cfg_get.pstn.gw_port);

         }



         route(RELAY);

         exit;

#!endif



         return;

}



# JSONRPC over HTTP(S) routing

#!ifdef WITH_JSONRPC

event_route[xhttp:request] {

         set_reply_close();

         set_reply_no_connect();

         if(src_ip!=127.0.0.1) {

                 xhttp_reply("403", "Forbidden", "text/html",

                                   "<html><body>Not allowed from $si</body></html>");

                 exit;

         }

         if ($hu =~ "^/RPC") {

                 jsonrpc_dispatch();

                 exit;

         }



         xhttp_reply("200", "OK", "text/html",

                                   "<html><body>Wrong URL $hu</body></html>");

    exit;

}

#!endif



# Routing to voicemail server

route[TOVOICEMAIL] {

#!ifdef WITH_VOICEMAIL

         if(!is_method("INVITE|SUBSCRIBE")) return;



         # check if VoiceMail server IP is defined

         if (strempty($sel(cfg_get.voicemail.srv_ip))) {

                 xlog("SCRIPT: VoiceMail routing enabled but IP not defined\n");

                 return;

         }

         if(is_method("INVITE")) {

                 if($avp(oexten)==$null) return;



                 $ru = "sip:" + $avp(oexten) + "@" + $sel(cfg_get.voicemail.srv_ip)

                                   + ":" + $sel(cfg_get.voicemail.srv_port);

         } else {

                 if($rU==$null) return;



                 $ru = "sip:" + $rU + "@" + $sel(cfg_get.voicemail.srv_ip)

                                   + ":" + $sel(cfg_get.voicemail.srv_port);

         }

         route(RELAY);

         exit;

#!endif



         return;

}



# Manage outgoing branches

branch_route[MANAGE_BRANCH] {

         xdbg("new branch [$T_branch_idx] to $ru\n");

         route(NATMANAGE);

}



# Manage incoming replies

reply_route {

         if(!sanity_check("17604", "6")) {

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

                 drop;

         }

}



# Manage incoming replies in transaction context

onreply_route[MANAGE_REPLY] {

         xdbg("incoming reply\n");

         if(status=~"[12][0-9][0-9]") {

                 route(NATMANAGE);

         }

}



# Manage failure routing cases

failure_route[MANAGE_FAILURE] {

         route(NATMANAGE);



         if (t_is_canceled()) exit;



#!ifdef WITH_BLOCK3XX

         # block call redirect based on 3xx replies.

         if (t_check_status("3[0-9][0-9]")) {

                 t_reply("404","Not found");

                 exit;

         }

#!endif



#!ifdef WITH_BLOCK401407

         # block call redirect based on 401, 407 replies.

         if (t_check_status("401|407")) {

                 t_reply("404","Not found");

                 exit;

         }

#!endif



#!ifdef WITH_VOICEMAIL

         # serial forking

         # - route to voicemail on busy or no answer (timeout)

         if (t_check_status("486|408")) {

                 $du = $null;

                 route(TOVOICEMAIL);

                 exit;

         }

#!endif

}

As you can see I just one thing in request_route

request_route {



         # per request initial checks

         # route(REQINIT);



         # NAT detection

         #route(NATDETECT);



         # CANCEL processing

         if (is_method("CANCEL")) {

                 if (t_check_trans()) {

                          route(RELAY);

                 }

                 exit;

         }



         # handle retransmissions

         if (!is_method("ACK")) {

                 if(t_precheck_trans()) {

                          t_check_trans();

                          exit;

                 }

                 t_check_trans();

         }



         if (is_method("REGISTER")) {

                 xdbg("request from gggggggggggggggggggggggggggggggggggggggggg - $rm from $fu (IP:$si:$sp)\n");

        }

         rewritehostport("172.28.69.52:5060");

The 172.28.69.52 is ip of my Freeswitch

After I try to call from Zoiper5, I get below error in Kamailio log and Zoiper does not work.

 4(10) ERROR: <core> [core/parser/msg_parser.c:681]: parse_msg(): ERROR: parse_msg: message=<���>

 4(10) ERROR: <core> [core/receive.c:310]: receive_msg(): core parsing of SIP message failed (172.28.64.1:51370/1)

Troubleshooting
Reproduction

  *   pull official Kamailio docker image kamailio/kamailio 5.4.6-buster
  *   then run below command

docker run --net=host --name kamailio \

       -v /home/ssoroosh/kamailio:/etc/kamailio \

       kamailio/kamailio:5.4.6-buster

Debugging Data

I do not have any debug data

Log Messages

Listening on

             udp: 172.28.72.99 [172.28.72.99]:5060 advertise 172.28.72.99:5060

Aliases:



 0(1) INFO: rr [../outbound/api.h:52]: ob_load_api(): unable to import bind_ob - maybe module is not loaded

 0(1) INFO: rr [rr_mod.c:185]: mod_init(): outbound module not available

 0(1) INFO: <core> [main.c:2919]: main(): processes (at least): 16 - shm size: 67108864 - pkg size: 8388608

 0(1) INFO: <core> [core/udp_server.c:154]: probe_max_receive_buffer(): SO_RCVBUF is initially 212992

 0(1) INFO: <core> [core/udp_server.c:206]: probe_max_receive_buffer(): SO_RCVBUF is finally 425984

13(19) INFO: jsonrpcs [jsonrpcs_sock.c:443]: jsonrpc_dgram_process(): a new child 0/19

15(21) INFO: ctl [io_listener.c:210]: io_listen_loop(): io_listen_loop: using epoll_lt as the io watch method (auto detected)

 2(8) INFO: <core> [core/parser/parse_fline.c:156]: parse_first_line(): ERROR:parse_first_line: method not followed by SP

 2(8) ERROR: <core> [core/parser/parse_fline.c:271]: parse_first_line(): parse_first_line: bad message (offset: 0)

 2(8) ERROR: <core> [core/parser/msg_parser.c:681]: parse_msg(): ERROR: parse_msg: message=<��>

 2(8) ERROR: <core> [core/receive.c:310]: receive_msg(): core parsing of SIP message failed (172.28.64.1:51370/1)

 4(10) INFO: <core> [core/parser/parse_fline.c:156]: parse_first_line(): ERROR:parse_first_line: method not followed by SP

 4(10) ERROR: <core> [core/parser/parse_fline.c:271]: parse_first_line(): parse_first_line: bad message (offset: 0)

 4(10) ERROR: <core> [core/parser/msg_parser.c:681]: parse_msg(): ERROR: parse_msg: message=<���>

 4(10) ERROR: <core> [core/receive.c:310]: receive_msg(): core parsing of SIP message failed (172.28.64.1:51370/1)

 1(7) INFO: <core> [core/parser/parse_fline.c:156]: parse_first_line(): ERROR:parse_first_line: method not followed by SP

 1(7) ERROR: <core> [core/parser/parse_fline.c:271]: parse_first_line(): parse_first_line: bad message (offset: 0)

 1(7) ERROR: <core> [core/parser/msg_parser.c:681]: parse_msg(): ERROR: parse_msg: message=<���>

 1(7) ERROR: <core> [core/receive.c:310]: receive_msg(): core parsing of SIP message failed (172.28.64.1:51370/1)

 3(9) INFO: <core> [core/parser/parse_fline.c:156]: parse_first_line(): ERROR:parse_first_line: method not followed by SP

 3(9) ERROR: <core> [core/parser/parse_fline.c:271]: parse_first_line(): parse_first_line: bad message (offset: 0)

 3(9) ERROR: <core> [core/parser/msg_parser.c:681]: parse_msg(): ERROR: parse_msg: message=<���>

 3(9) ERROR: <core> [core/receive.c:310]: receive_msg(): core parsing of SIP message failed (172.28.64.1:51370/1)

 5(11) INFO: <core> [core/parser/parse_fline.c:156]: parse_first_line(): ERROR:parse_first_line: method not followed by SP

 5(11) ERROR: <core> [core/parser/parse_fline.c:271]: parse_first_line(): parse_first_line: bad message (offset: 0)

 5(11) ERROR: <core> [core/parser/msg_parser.c:681]: parse_msg(): ERROR: parse_msg: message=<���>

 5(11) ERROR: <core> [core/receive.c:310]: receive_msg(): core parsing of SIP message failed (172.28.64.1:51370/1)

 8(14) INFO: <core> [core/parser/parse_fline.c:156]: parse_first_line(): ERROR:parse_first_line: method not followed by SP

 8(14) ERROR: <core> [core/parser/parse_fline.c:271]: parse_first_line(): parse_first_line: bad message (offset: 0)

 8(14) ERROR: <core> [core/parser/msg_parser.c:681]: parse_msg(): ERROR: parse_msg: message=<���>

 8(14) ERROR: <core> [core/receive.c:310]: receive_msg(): core parsing of SIP message failed (172.28.64.1:51370/1)

 1(7) INFO: <core> [core/parser/parse_fline.c:156]: parse_first_line(): ERROR:parse_first_line: method not followed by SP

 1(7) ERROR: <core> [core/parser/parse_fline.c:271]: parse_first_line(): parse_first_line: bad message (offset: 0)

 1(7) ERROR: <core> [core/parser/msg_parser.c:681]: parse_msg(): ERROR: parse_msg: message=<���>

 1(7) ERROR: <core> [core/receive.c:310]: receive_msg(): core parsing of SIP message failed (172.28.64.1:51370/1)

 5(11) INFO: <core> [core/parser/parse_fline.c:156]: parse_first_line(): ERROR:parse_first_line: method not followed by SP

 5(11) ERROR: <core> [core/parser/parse_fline.c:271]: parse_first_line(): parse_first_line: bad message (offset: 0)

 5(11) ERROR: <core> [core/parser/msg_parser.c:681]: parse_msg(): ERROR: parse_msg: message=<���>

 5(11) ERROR: <core> [core/receive.c:310]: receive_msg(): core parsing of SIP message failed (172.28.64.1:51370/1)

 4(10) INFO: <core> [core/parser/parse_fline.c:156]: parse_first_line(): ERROR:parse_first_line: method not followed by SP

 4(10) ERROR: <core> [core/parser/parse_fline.c:271]: parse_first_line(): parse_first_line: bad message (offset: 0)

 4(10) ERROR: <core> [core/parser/msg_parser.c:681]: parse_msg(): ERROR: parse_msg: message=<���>

 4(10) ERROR: <core> [core/receive.c:310]: receive_msg(): core parsing of SIP message failed (172.28.64.1:51370/1)

 5(11) INFO: <core> [core/parser/parse_fline.c:156]: parse_first_line(): ERROR:parse_first_line: method not followed by SP

 5(11) ERROR: <core> [core/parser/parse_fline.c:271]: parse_first_line(): parse_first_line: bad message (offset: 0)

 5(11) ERROR: <core> [core/parser/msg_parser.c:681]: parse_msg(): ERROR: parse_msg: message=<���>

 5(11) ERROR: <core> [core/receive.c:310]: receive_msg(): core parsing of SIP message failed (172.28.64.1:51370/1)

 6(12) ERROR: <core> [core/parser/parse_fline.c:271]: parse_first_line(): parse_first_line: bad message (offset: 41)

 6(12) ERROR: <core> [core/parser/msg_parser.c:681]: parse_msg(): ERROR: parse_msg: message=<��>

 6(12) ERROR: <core> [core/receive.c:310]: receive_msg(): core parsing of SIP message failed (172.28.64.1:51370/1)

 7(13) ERROR: <core> [core/parser/parse_fline.c:271]: parse_first_line(): parse_first_line: bad message (offset: 41)

 7(13) ERROR: <core> [core/parser/msg_parser.c:681]: parse_msg(): ERROR: parse_msg: message=<���>

 7(13) ERROR: <core> [core/receive.c:310]: receive_msg(): core parsing of SIP message failed (172.28.64.1:51370/1)

 8(14) ERROR: <core> [core/parser/parse_fline.c:271]: parse_first_line(): parse_first_line: bad message (offset: 41)

 8(14) ERROR: <core> [core/parser/msg_parser.c:681]: parse_msg(): ERROR: parse_msg: message=<���>

 8(14) ERROR: <core> [core/receive.c:310]: receive_msg(): core parsing of SIP message failed (172.28.64.1:51370/1)

 2(8) ERROR: <core> [core/parser/parse_fline.c:271]: parse_first_line(): parse_first_line: bad message (offset: 41)

 2(8) ERROR: <core> [core/parser/msg_parser.c:681]: parse_msg(): ERROR: parse_msg: message=<���>

 2(8) ERROR: <core> [core/receive.c:310]: receive_msg(): core parsing of SIP message failed (172.28.64.1:51370/1)

 4(10) ERROR: <core> [core/parser/parse_fline.c:271]: parse_first_line(): parse_first_line: bad message (offset: 41)

 4(10) ERROR: <core> [core/parser/msg_parser.c:681]: parse_msg(): ERROR: parse_msg: message=<���>

 4(10) ERROR: <core> [core/receive.c:310]: receive_msg(): core parsing of SIP message failed (172.28.64.1:51370/1)

 1(7) ERROR: <core> [core/parser/parse_fline.c:271]: parse_first_line(): parse_first_line: bad message (offset: 41)

 1(7) ERROR: <core> [core/parser/msg_parser.c:681]: parse_msg(): ERROR: parse_msg: message=<���>

 1(7) ERROR: <core> [core/receive.c:310]: receive_msg(): core parsing of SIP message failed (172.28.64.1:51370/1)

 3(9) ERROR: <core> [core/parser/parse_fline.c:271]: parse_first_line(): parse_first_line: bad message (offset: 41)

 3(9) ERROR: <core> [core/parser/msg_parser.c:681]: parse_msg(): ERROR: parse_msg: message=<���>

 3(9) ERROR: <core> [core/receive.c:310]: receive_msg(): core parsing of SIP message failed (172.28.64.1:51370/1)

 5(11) ERROR: <core> [core/parser/parse_fline.c:271]: parse_first_line(): parse_first_line: bad message (offset: 41)

 5(11) ERROR: <core> [core/parser/msg_parser.c:681]: parse_msg(): ERROR: parse_msg: message=<���>

 5(11) ERROR: <core> [core/receive.c:310]: receive_msg(): core parsing of SIP message failed (172.28.64.1:51370/1)

 6(12) ERROR: <core> [core/parser/parse_fline.c:271]: parse_first_line(): parse_first_line: bad message (offset: 41)

 6(12) ERROR: <core> [core/parser/msg_parser.c:681]: parse_msg(): ERROR: parse_msg: message=<���>

 6(12) ERROR: <core> [core/receive.c:310]: receive_msg(): core parsing of SIP message failed (172.28.64.1:51370/1)

 7(13) ERROR: <core> [core/parser/parse_fline.c:271]: parse_first_line(): parse_first_line: bad message (offset: 41)

 7(13) ERROR: <core> [core/parser/msg_parser.c:681]: parse_msg(): ERROR: parse_msg: message=<���>

 7(13) ERROR: <core> [core/receive.c:310]: receive_msg(): core parsing of SIP message failed (172.28.64.1:51370/1)

SIP Traffic

My pcap is attached
sip.zip<https://github.com/kamailio/kamailio/files/8326814/sip.zip>

Possible Solutions

I have not any solution yet.

Additional Information

  *   Kamailio Version - output of kamailio -v

version: kamailio 5.4.6 (x86_64/linux)

flags: USE_TCP, USE_TLS, USE_SCTP, TLS_HOOKS, USE_RAW_SOCKS, DISABLE_NAGLE, USE_MCAST, DNS_IP_HACK, SHM_MMAP, PKG_MALLOC, Q_MALLOC, F_MALLOC, TLSF_MALLOC, DBG_SR_MEMORY, USE_FUTEX, FAST_LOCK-ADAPTIVE_WAIT, USE_DNS_CACHE, USE_DNS_FAILOVER, USE_NAPTR, USE_DST_BLACKLIST, HAVE_RESOLV_RES, TLS_PTHREAD_MUTEX_SHARED

ADAPTIVE_WAIT_LOOPS 1024, MAX_RECV_BUFFER_SIZE 262144, MAX_URI_SIZE 1024, BUF_SIZE 65535, DEFAULT PKG_SIZE 8MB

poll method support: poll, epoll_lt, epoll_et, sigio_rt, select.

id: unknown

compiled with gcc 8.3.0

  *   Operating System:

Linux master 5.4.0-104-generic #118-Ubuntu SMP Wed Mar 2 19:02:41 UTC 2022 x86_64 GNU/Linux



root at master:/home# lsb_release -a

No LSB modules are available.

Distributor ID: Debian

Description:    Debian GNU/Linux 10 (buster)

Release:        10

Codename:       buster

How to resolve this?

thanks
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