Re: [SR-Users] ACK not routed to destination

15 Dec 2016


      Wim,
Looks like your ACK is missing the Route header, since ACK is a new
transaction kamailio needs to route it based on a preloaded route. When
you receive the 200OK in sipp you should save the record route set and
use it in the ACK with the "[routes]" statement.
Take a look at the SIPP docs and search for rrs="true". If you take a
packet capture on the loopback interface of the kamailio server you will
probably see that kamailio keeps looping the ACK until the Max-Forwards
is exhausted.
Example:
<recv response="200" rtd="true" rrs="true">
 </recv>
<send>
 <![CDATA[
ACK [next_url] SIP/2.0
 Via: SIP/2.0/[transport] [local_ip]:[local_port];branch=[branch]
 From: sipp sip:sipp@[field1];tag=[pid]SIPpTag00[call_number]
 To: sut sip:[service]@[field1][peer_tag_param]
 Call-ID: [call_id]
 CSeq: 2 ACK
 [routes]
 Contact: sip:[service]@[local_ip]:[local_port]
 Max-Forwards: 70
 Subject: Performance Test
 Content-Length: 0
]]>
 </send>
Regards,
Jan Hazenberg
Wim Van Cauwenbergh schreef op 2016-12-15 15:13:
...
Hi, I have setup kamailio with the dispatcher module and have a problem with the ACK in response to 200OK not being forwarded by kamailio:
Scenario is very simple: 
sipp(.219) --> kamailio (.220) --> sipp(.239)
SIP trace:
root@DNS-enum-8Gb-3:/var/log# ngrep -W byline -d eth0 port 5060 
interface: eth0 (10.57.26.0/255.255.255.0 [2]) 
filter: (ip or ip6) and ( port 5060 ) 
# 
U 10.57.26.219:5060 [3] -> 10.57.26.220:5060 [4] 
INVITE sip:service@10.57.26.220:5060 [5] SIP/2.0. 
Via: SIP/2.0/UDP 10.57.26.219:5060;branch=z9hG4bK-15698-1-0. 
From: sipp <sip:sipp@10.57.26.219:5060 [6]>;tag=15698SIPpTag021. 
To: sut <sip:service@10.57.26.220:5060 [5]>. 
Call-ID: 1-15698@10.57.26.219. 
CSeq: 1 INVITE. 
Contact: sip:sipp@10.57.26.219:5060 [6]. 
Max-Forwards: 70. 
Subject: Performance Test. 
Content-Type: application/sdp. 
Content-Length: 135. 
. 
v=0. 
o=user1 53655765 2353687637 IN IP4 10.57.26.219. 
s=-. 
c=IN IP4 10.57.26.219. 
t=0 0. 
m=audio 6000 RTP/AVP 0. 
a=rtpmap:0 PCMU/8000.
# 
U 10.57.26.220:5060 [4] -> 10.57.26.219:5060 [3] 
SIP/2.0 100 trying -- your call is important to us. 
Via: SIP/2.0/UDP 10.57.26.219:5060;branch=z9hG4bK-15698-1-0. 
From: sipp <sip:sipp@10.57.26.219:5060 [6]>;tag=15698SIPpTag021. 
To: sut <sip:service@10.57.26.220:5060 [5]>. 
Call-ID: 1-15698@10.57.26.219. 
CSeq: 1 INVITE. 
Server: kamailio (4.2.0 (x86_64/linux)). 
Content-Length: 0. 
.
# 
U 10.57.26.220:5060 [4] -> 10.57.26.239:5060 [7] 
INVITE sip:service@10.57.26.220:5060 [5] SIP/2.0. 
Record-Route: sip:10.57.26.220;lr. 
Via: SIP/2.0/UDP 10.57.26.220;branch=z9hG4bKf92d.33550a94aa52aef3978cb507902d8aaa.0. 
Via: SIP/2.0/UDP 10.57.26.219:5060;branch=z9hG4bK-15698-1-0. 
From: sipp <sip:sipp@10.57.26.219:5060 [6]>;tag=15698SIPpTag021. 
To: sut <sip:service@10.57.26.220:5060 [5]>. 
Call-ID: 1-15698@10.57.26.219. 
CSeq: 1 INVITE. 
Contact: sip:sipp@10.57.26.219:5060 [6]. 
Max-Forwards: 69. 
Subject: Performance Test. 
Content-Type: application/sdp. 
Content-Length: 135. 
. 
v=0. 
o=user1 53655765 2353687637 IN IP4 10.57.26.219. 
s=-. 
c=IN IP4 10.57.26.219. 
t=0 0. 
m=audio 6000 RTP/AVP 0. 
a=rtpmap:0 PCMU/8000.
# 
U 10.57.26.239:5060 [7] -> 10.57.26.220:5060 [4] 
SIP/2.0 180 Ringing. 
Via: SIP/2.0/UDP 10.57.26.220;branch=z9hG4bKf92d.33550a94aa52aef3978cb507902d8aaa.0, SIP/2.0/UDP 10.57.26.219:5060;branch=z9hG4bK-15698-1-0. 
From: sipp <sip:sipp@10.57.26.219:5060 [6]>;tag=15698SIPpTag021. 
To: sut <sip:service@10.57.26.220:5060 [5]>;tag=14783SIPpTag018. 
Call-ID: 1-15698@10.57.26.219. 
CSeq: 1 INVITE. 
Contact: sip:10.57.26.239:5060;transport=UDP. 
Content-Length: 0. 
.
# 
U 10.57.26.239:5060 [7] -> 10.57.26.220:5060 [4] 
SIP/2.0 200 OK. 
Via: SIP/2.0/UDP 10.57.26.220;branch=z9hG4bKf92d.33550a94aa52aef3978cb507902d8aaa.0, SIP/2.0/UDP 10.57.26.219:5060;branch=z9hG4bK-15698-1-0. 
From: sipp <sip:sipp@10.57.26.219:5060 [6]>;tag=15698SIPpTag021. 
To: sut <sip:service@10.57.26.220:5060 [5]>;tag=14783SIPpTag018. 
Call-ID: 1-15698@10.57.26.219. 
CSeq: 1 INVITE. 
Contact: sip:10.57.26.239:5060;transport=UDP. 
Content-Type: application/sdp. 
Content-Length: 135. 
. 
v=0. 
o=user1 53655765 2353687637 IN IP4 10.57.26.239. 
s=-. 
c=IN IP4 10.57.26.239. 
t=0 0. 
m=audio 6000 RTP/AVP 0. 
a=rtpmap:0 PCMU/8000.
# 
U 10.57.26.220:5060 [4] -> 10.57.26.219:5060 [3] 
SIP/2.0 180 Ringing. 
Via: SIP/2.0/UDP 10.57.26.219:5060;branch=z9hG4bK-15698-1-0. 
From: sipp <sip:sipp@10.57.26.219:5060 [6]>;tag=15698SIPpTag021. 
To: sut <sip:service@10.57.26.220:5060 [5]>;tag=14783SIPpTag018. 
Call-ID: 1-15698@10.57.26.219. 
CSeq: 1 INVITE. 
Contact: sip:10.57.26.239:5060;transport=UDP. 
Content-Length: 0. 
.
# 
U 10.57.26.220:5060 [4] -> 10.57.26.219:5060 [3] 
SIP/2.0 200 OK. 
Via: SIP/2.0/UDP 10.57.26.219:5060;branch=z9hG4bK-15698-1-0. 
From: sipp <sip:sipp@10.57.26.219:5060 [6]>;tag=15698SIPpTag021. 
To: sut <sip:service@10.57.26.220:5060 [5]>;tag=14783SIPpTag018. 
Call-ID: 1-15698@10.57.26.219. 
CSeq: 1 INVITE. 
Contact: sip:10.57.26.239:5060;transport=UDP. 
Content-Type: application/sdp. 
Content-Length: 135. 
. 
v=0. 
o=user1 53655765 2353687637 IN IP4 10.57.26.239. 
s=-. 
c=IN IP4 10.57.26.239. 
t=0 0. 
m=audio 6000 RTP/AVP 0. 
a=rtpmap:0 PCMU/8000.
# 
U 10.57.26.219:5060 [3] -> 10.57.26.220:5060 [4] 
ACK sip:10.57.26.239:5060;transport=UDP SIP/2.0. 
Via: SIP/2.0/UDP 10.57.26.219:5060;branch=z9hG4bK-15698-1-5. 
From: sipp <sip:sipp@10.57.26.219:5060 [6]>;tag=15698SIPpTag021. 
To: sut <sip:service@10.57.26.220:5060 [5]>;tag=14783SIPpTag018. 
Call-ID: 1-15698@10.57.26.219. 
CSeq: 1 ACK. 
Contact: sip:sipp@10.57.26.219:5060 [6]. 
Max-Forwards: 70. 
Subject: Performance Test. 
XContactinOK: sip:10.57.26.239:5060;transport=UDP. 
Content-Length: 0. 
.
# 
U 10.57.26.239:5060 [7] -> 10.57.26.220:5060 [4] 
SIP/2.0 200 OK. 
Via: SIP/2.0/UDP 10.57.26.220;branch=z9hG4bKf92d.33550a94aa52aef3978cb507902d8aaa.0, SIP/2.0/UDP 10.57.26.219:5060;branch=z9hG4bK-15698-1-0. 
From: sipp <sip:sipp@10.57.26.219:5060 [6]>;tag=15698SIPpTag021. 
To: sut <sip:service@10.57.26.220:5060 [5]>;tag=14783SIPpTag018. 
Call-ID: 1-15698@10.57.26.219. 
CSeq: 1 INVITE. 
Contact: sip:10.57.26.239:5060;transport=UDP. 
Content-Type: application/sdp. 
Content-Length: 135. 
. 
v=0. 
o=user1 53655765 2353687637 IN IP4 10.57.26.239. 
s=-. 
c=IN IP4 10.57.26.239. 
t=0 0. 
m=audio 6000 RTP/AVP 0. 
a=rtpmap:0 PCMU/8000.
# 
U 10.57.26.220:5060 [4] -> 10.57.26.219:5060 [3] 
SIP/2.0 200 OK. 
Via: SIP/2.0/UDP 10.57.26.219:5060;branch=z9hG4bK-15698-1-0. 
From: sipp <sip:sipp@10.57.26.219:5060 [6]>;tag=15698SIPpTag021. 
To: sut <sip:service@10.57.26.220:5060 [5]>;tag=14783SIPpTag018. 
Call-ID: 1-15698@10.57.26.219. 
CSeq: 1 INVITE. 
Contact: sip:10.57.26.239:5060;transport=UDP. 
Content-Type: application/sdp. 
Content-Length: 135. 
. 
v=0. 
o=user1 53655765 2353687637 IN IP4 10.57.26.239. 
s=-. 
c=IN IP4 10.57.26.239. 
t=0 0. 
m=audio 6000 RTP/AVP 0. 
a=rtpmap:0 PCMU/8000.
# 
U 10.57.26.219:5060 [3] -> 10.57.26.220:5060 [4] 
ACK SIP:10.57.26.239:5060;TRANSPORT=UDP SIP/2.0. 
VIA: SIP/2.0/UDP 10.57.26.219:5060;BRANCH=Z9HG4BK-15698-1-5. 
FROM: SIPP <SIP:SIPP@10.57.26.219:5060 [6]>;TAG=15698SIPPTAG021. 
TO: SUT <SIP:SERVICE@10.57.26.220:5060 [5]>;TAG=14783SIPPTAG018. 
CALL-ID: 1-15698@10.57.26.219. 
CSEQ: 1 ACK. 
CONTACT: SIP:SIPP@10.57.26.219:5060 [6]. 
MAX-FORWARDS: 70. 
SUBJECT: PERFORMANCE TEST. 
XCONTACTINOK: SIP:10.57.26.239:5060;TRANSPORT=UDP. 
CONTENT-LENGTH: 0. 
.
# 
U 10.57.26.219:5060 [3] -> 10.57.26.220:5060 [4] 
BYE sip:10.57.26.239:5060;transport=UDP SIP/2.0. 
Via: SIP/2.0/UDP 10.57.26.219:5060;branch=z9hG4bK-15698-1-7. 
From: sipp <sip:sipp@10.57.26.219:5060 [6]>;tag=15698SIPpTag021. 
To: sut <sip:service@10.57.26.220:5060 [5]>;tag=14783SIPpTag018. 
Call-ID: 1-15698@10.57.26.219. 
CSeq: 2 BYE. 
Contact: sip:sipp@10.57.26.219:5060 [6]. 
Max-Forwards: 70. 
Subject: Performance Test. 
Content-Length: 0. 
.
# 
U 10.57.26.220:5060 [4] -> 10.57.26.219:5060 [3] 
SIP/2.0 404 Not here. 
Via: SIP/2.0/UDP 10.57.26.219:5060;branch=z9hG4bK-15698-1-7. 
From: sipp <sip:sipp@10.57.26.219:5060 [6]>;tag=15698SIPpTag021. 
To: sut <sip:service@10.57.26.220:5060 [5]>;tag=14783SIPpTag018. 
Call-ID: 1-15698@10.57.26.219. 
CSeq: 2 BYE. 
Server: kamailio (4.2.0 (x86_64/linux)). 
Content-Length: 0. 
.
# 
U 10.57.26.219:5060 [3] -> 10.57.26.220:5060 [4] 
BYE sip:service@10.57.26.220:5060 [5] SIP/2.0. 
Via: SIP/2.0/UDP 10.57.26.219:5060;branch=z9hG4bK-15698-1--1. 
From: sipp <sip:sipp@10.57.26.219:5060 [6]>;tag=15698SIPpTag021. 
To: sut <sip:service@10.57.26.220:5060 [5]>;tag=14783SIPpTag018. 
Call-ID: 1-15698@10.57.26.219. 
CSeq: 3 BYE. 
Max-Forwards: 70. 
Contact: sip:sipp@10.57.26.219:5060;transport=UDP. 
Content-Length: 0. 
.
# 
U 10.57.26.220:5060 [4] -> 10.57.26.219:5060 [3] 
SIP/2.0 404 Not here. 
Via: SIP/2.0/UDP 10.57.26.219:5060;branch=z9hG4bK-15698-1--1. 
From: sipp <sip:sipp@10.57.26.219:5060 [6]>;tag=15698SIPpTag021. 
To: sut <sip:service@10.57.26.220:5060 [5]>;tag=14783SIPpTag018. 
Call-ID: 1-15698@10.57.26.219. 
CSeq: 3 BYE. 
Server: kamailio (4.2.0 (x86_64/linux)). 
Content-Length: 0. 
.
# 
U 10.57.26.239:5060 [7] -> 10.57.26.220:5060 [4] 
SIP/2.0 200 OK. 
Via: SIP/2.0/UDP 10.57.26.220;branch=z9hG4bKf92d.33550a94aa52aef3978cb507902d8aaa.0, SIP/2.0/UDP 10.57.26.219:5060;branch=z9hG4bK-15698-1-0. 
From: sipp <sip:sipp@10.57.26.219:5060 [6]>;tag=15698SIPpTag021. 
To: sut <sip:service@10.57.26.220:5060 [5]>;tag=14783SIPpTag018. 
Call-ID: 1-15698@10.57.26.219. 
CSeq: 1 INVITE. 
Contact: sip:10.57.26.239:5060;transport=UDP. 
Content-Type: application/sdp. 
Content-Length: 135. 
. 
v=0. 
o=user1 53655765 2353687637 IN IP4 10.57.26.239. 
s=-. 
c=IN IP4 10.57.26.239. 
t=0 0. 
m=audio 6000 RTP/AVP 0. 
a=rtpmap:0 PCMU/8000.
# 
U 10.57.26.220:5060 [4] -> 10.57.26.219:5060 [3] 
SIP/2.0 200 OK. 
Via: SIP/2.0/UDP 10.57.26.219:5060;branch=z9hG4bK-15698-1-0. 
From: sipp <sip:sipp@10.57.26.219:5060 [6]>;tag=15698SIPpTag021. 
To: sut <sip:service@10.57.26.220:5060 [5]>;tag=14783SIPpTag018. 
Call-ID: 1-15698@10.57.26.219. 
CSeq: 1 INVITE. 
Contact: sip:10.57.26.239:5060;transport=UDP. 
Content-Type: application/sdp. 
Content-Length: 135. 
. 
v=0. 
o=user1 53655765 2353687637 IN IP4 10.57.26.239. 
s=-. 
c=IN IP4 10.57.26.239. 
t=0 0. 
m=audio 6000 RTP/AVP 0. 
a=rtpmap:0 PCMU/8000.
KAMAILIO.CONF:
# ----- mi_fifo params ----- 
modparam("mi_fifo", "fifo_name", "/var/run/kamailio/kamailio_fifo") 
modparam("ctl", "binrpc", "unix:/var/run/kamailio/kamailio_ctl")
# ----- rr params ----- 
# add value to ;lr param to cope with most of the 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)
# ----- acc params ----- 
modparam("acc", "log_flag", 1) 
modparam("acc", "failed_transaction_flag", 3) 
modparam("acc", "log_extra", 
"src_user=$fU;src_domain=$fd;dst_ouser=$tU;dst_user=$rU;dst_domain=$rd;src_ip=$si")
# ----- tm params ----- 
modparam("tm", "fr_timer", 2000) 
modparam("tm", "fr_inv_timer", 40000)
# ----- dispatcher params ----- 
#modparam("dispatcher", "db_url", 
# "mysql://openser:openserro@localhost/openser") 
modparam("dispatcher", "list_file", "/etc/kamailio/dispatcher.list") 
modparam("dispatcher", "table_name", "dispatcher") 
modparam("dispatcher", "flags", 2) 
modparam("dispatcher", "dst_avp", "$avp(AVP_DST)") 
modparam("dispatcher", "grp_avp", "$avp(AVP_GRP)") 
modparam("dispatcher", "cnt_avp", "$avp(AVP_CNT)")
####### Routing Logic ########
# main request routing logic
route {
# per request initial checks 
route(REQINIT);
# handle requests within SIP dialogs 
route(WITHINDLG);
### only initial requests (no To tag)
# CANCEL processing 
if (is_method("CANCEL")) 
{ 
if (t_check_trans()) 
t_relay(); 
exit; 
}
t_check_trans();
# record routing for dialog forming requests (in case they are routed) 
# - remove preloaded route headers 
remove_hf("Route"); 
if (is_method("INVITE|SUBSCRIBE")) 
record_route();
# account only INVITEs 
if (is_method("INVITE")) 
{ 
setflag(1); # do accounting 
}
# handle presence related requests 
route(PRESENCE);
# handle registrations 
route(REGISTRAR);
if ($rU==$null) 
{ 
# request with no Username in RURI 
sl_send_reply("484","Address Incomplete"); 
exit; 
}
# dispatch destinations 
route(DISPATCH);
route(RELAY); 
}
route[RELAY] { 
if (!t_relay()) { 
sl_reply_error(); 
} 
exit; 
}
# Per SIP request initial checks 
route[REQINIT] { 
if (!mf_process_maxfwd_header("15")) { 
sl_send_reply("483","Too Many Hops"); 
exit; 
}
# 1= only check the header RURI, 1126 checks some other general stuff 
if(!sanity_check("1126", "1")) 
{ 
xlog("Malformed SIP message from $si:$spn"); 
exit; 
} 
}
# Handle requests within SIP dialogs 
route[WITHINDLG] { 
if (has_totag()) { 
# sequential request withing a dialog should 
# take the path determined by record-routing 
xlog("#######WITHINDLG:hastotag $si:$spn"); 
if (loose_route()) { 
xlog("#######WITHINDLG:looseroute $si:$spn"); 
if (is_method("BYE")) { 
setflag(1); # do accounting ... 
setflag(3); # ... even if the transaction fails 
} 
route(RELAY); 
} else { 
if (is_method("SUBSCRIBE") && uri == myself) { 
# in-dialog subscribe requests 
route(PRESENCE); 
exit; 
} 
if ( is_method("ACK") ) { 
if ( t_check_trans() ) { 
xlog("#######WITHINDLG:ACK transaction found $si:$spn"); 
# non loose-route, but stateful ACK; 
# must be ACK after a 487 or e.g. 404 from upstream server 
t_relay(); 
exit; 
} else { 
# ACK without matching transaction ... ignore and discard. 
xlog("#######WITHINDLG:ACK no transaction found so discard $si:$spn"); 
exit; 
} 
} 
sl_send_reply("404","Not here"); 
} 
exit; 
} 
}
Debug:
Dec 15 15:12:02 DNS-enum-8Gb-3 kamailio[6864]: 1(6883) DEBUG: <core> [parser/msg_parser.c:623]: parse_msg(): SIP Request: 
Dec 15 15:12:02 DNS-enum-8Gb-3 kamailio[6864]: 1(6883) DEBUG: <core> [parser/msg_parser.c:625]: parse_msg(): method: <ACK> 
Dec 15 15:12:02 DNS-enum-8Gb-3 kamailio[6864]: 1(6883) DEBUG: <core> [parser/msg_parser.c:627]: parse_msg(): uri: sip:10.57.26.239:5060;transport=UDP 
Dec 15 15:12:02 DNS-enum-8Gb-3 kamailio[6864]: 1(6883) DEBUG: <core> [parser/msg_parser.c:629]: parse_msg(): version: <SIP/2.0> 
Dec 15 15:12:02 DNS-enum-8Gb-3 kamailio[6864]: 1(6883) DEBUG: <core> [parser/parse_via.c:1284]: parse_via_param(): Found param type 232, <branch> = <z9hG4bK-15698-1-5>; state=16 
Dec 15 15:12:02 DNS-enum-8Gb-3 kamailio[6864]: 1(6883) DEBUG: <core> [parser/parse_via.c:2672]: parse_via(): end of header reached, state=5 
Dec 15 15:12:02 DNS-enum-8Gb-3 kamailio[6864]: 1(6883) DEBUG: <core> [parser/msg_parser.c:513]: parse_headers(): parse_headers: Via found, flags=2 
Dec 15 15:12:02 DNS-enum-8Gb-3 kamailio[6864]: 1(6883) DEBUG: <core> [parser/msg_parser.c:515]: parse_headers(): parse_headers: this is the first via 
Dec 15 15:12:02 DNS-enum-8Gb-3 kamailio[6864]: 1(6883) DEBUG: <core> [receive.c:154]: receive_msg(): After parse_msg... 
Dec 15 15:12:02 DNS-enum-8Gb-3 kamailio[6864]: 1(6883) DEBUG: <core> [receive.c:197]: receive_msg(): preparing to run routing scripts... 
Dec 15 15:12:02 DNS-enum-8Gb-3 kamailio[6864]: 1(6883) DEBUG: sl [sl_funcs.c:412]: sl_filter_ACK(): DEBUG : sl_filter_ACK: to late to be a local ACK! 
Dec 15 15:12:02 DNS-enum-8Gb-3 kamailio[6864]: 1(6883) DEBUG: <core> [parser/parse_addr_spec.c:176]: parse_to_param(): DEBUG: add_param: tag=14783SIPpTag018 
Dec 15 15:12:02 DNS-enum-8Gb-3 kamailio[6864]: 1(6883) DEBUG: <core> [parser/parse_addr_spec.c:898]: parse_addr_spec(): end of header reached, state=29 
Dec 15 15:12:02 DNS-enum-8Gb-3 kamailio[6864]: 1(6883) DEBUG: <core> [parser/msg_parser.c:190]: get_hdr_field(): DEBUG: get_hdr_field: <To> [57]; uri=[sip:service@10.57.26.220:5060 [5]] 
Dec 15 15:12:02 DNS-enum-8Gb-3 kamailio[6864]: 1(6883) DEBUG: <core> [parser/msg_parser.c:192]: get_hdr_field(): DEBUG: to body [sut <sip:service@10.57.26.220:5060 [5]>] 
Dec 15 15:12:02 DNS-enum-8Gb-3 kamailio[6864]: 1(6883) DEBUG: <core> [parser/msg_parser.c:170]: get_hdr_field(): get_hdr_field: cseq <CSeq>: <1> <ACK> 
Dec 15 15:12:02 DNS-enum-8Gb-3 kamailio[6864]: 1(6883) DEBUG: maxfwd [mf_funcs.c:85]: is_maxfwd_present(): value = 70 
Dec 15 15:12:02 DNS-enum-8Gb-3 kamailio[6864]: 1(6883) DEBUG: sanity [mod_sanity.c:255]: w_sanity_check(): sanity checks result: 1 
Dec 15 15:12:02 DNS-enum-8Gb-3 kamailio[6864]: 1(6883) DEBUG: siputils [checks.c:106]: has_totag(): totag found 
Dec 15 15:12:02 DNS-enum-8Gb-3 kamailio[6864]: 1(6883) ERROR: <script>: #######WITHINDLG:hastotag 10.57.26.219:5060 [3] 
Dec 15 15:12:02 DNS-enum-8Gb-3 kamailio[6864]: 1(6883) DEBUG: <core> [parser/msg_parser.c:204]: get_hdr_field(): DEBUG: get_hdr_body : content_length=0 
Dec 15 15:12:02 DNS-enum-8Gb-3 kamailio[6864]: 1(6883) DEBUG: <core> [parser/msg_parser.c:106]: get_hdr_field(): found end of header 
Dec 15 15:12:02 DNS-enum-8Gb-3 kamailio[6864]: 1(6883) DEBUG: rr [loose.c:113]: find_first_route(): No Route headers found 
Dec 15 15:12:02 DNS-enum-8Gb-3 kamailio[6864]: 1(6883) DEBUG: rr [loose.c:929]: loose_route(): There is no Route HF 
Dec 15 15:12:02 DNS-enum-8Gb-3 kamailio[6864]: 1(6883) DEBUG: tm [t_lookup.c:1072]: t_check_msg(): DEBUG: t_check_msg: msg id=9 global id=8 T start=(nil) 
Dec 15 15:12:02 DNS-enum-8Gb-3 kamailio[6864]: 1(6883) DEBUG: tm [t_lookup.c:527]: t_lookup_request(): t_lookup_request: start searching: hash=53919, isACK=1 
Dec 15 15:12:02 DNS-enum-8Gb-3 kamailio[6864]: 1(6883) DEBUG: tm [t_lookup.c:485]: matching_3261(): DEBUG: RFC3261 transaction matching failed 
Dec 15 15:12:02 DNS-enum-8Gb-3 kamailio[6864]: 1(6883) DEBUG: tm [t_lookup.c:709]: t_lookup_request(): DEBUG: t_lookup_request: no transaction found 
Dec 15 15:12:02 DNS-enum-8Gb-3 kamailio[6864]: 1(6883) DEBUG: tm [t_lookup.c:1141]: t_check_msg(): DEBUG: t_check_msg: msg id=9 global id=9 T end=(nil) 
Dec 15 15:12:02 DNS-enum-8Gb-3 kamailio[6864]: 1(6883) ERROR: <script>: #######WITHINDLG:ACK no transaction found so discard 10.57.26.219:5060 [3] 
Dec 15 15:12:02 DNS-enum-8Gb-3 kamailio[6864]: 1(6883) DEBUG: <core> [usr_avp.c:643]: destroy_avp_list(): DEBUG:destroy_avp_list: destroying list (nil)

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Re: [SR-Users] ACK not routed to destination