20 Jul
2018
20 Jul
'18
2:01 p.m.
Hello Ali,
ACK is sent by UAC to the Contact which is received in OK from UAS.
So from my point of view you need to fix that Contact in OK on your proxy.
My NATDETECT looks like:
if (nat_uac_test("19")) {
fix_nated_contact();
}
I call it for requests and responses.
Best regards.
Konstantin
Message: 23
Date: Fri, 20 Jul 2018 11:13:42 +0300
From: "Ali Taher" < ataher(a)vanrise.com >
To: < sr-users(a)lists.sip-router.org >
Subject: [SR-Users] NATHELPER issue
Message-ID: < 070901d42001$939be2b0$bad3a810$(a)vanrise.com >
Content-Type: text/plain; charset="utf-8"
Hello,
I'm using Kamailio 4.2 as proxy with nathelper enabled.
Yet , the ACK packet sent from the proxy to the origination's private IP.
The ACK is sent as reply on the following 200 OK sent from the origination :
8m2EJN41BN/6WSIP/2.0 200 OK
From: <sip:+4444331234567@X.X.X.X;user=phone>;tag=XQBQNjvjgp4Ze
To: <sip:+905362695933@172.16.45.65;user=phone>;tag=12033368836000
Via: SIP/2.0/UDP
X.X.X.X:5065;branch=z9hG4bK2959.233ecbc5eff949f946d8763ce25e5e6d.0;received=
X.X.X.X,SIP/2.0/UDP
X.X.X.X;received=X.X.X.X;rport=5060;branch=z9hG4bKN93cXvv26vDDN
Record-Route: <sip:X.X.X.X:5065;lr;ftag=XQBQNjvjgp4Ze>
Call-ID: CbeX8453909200habfGhEfElPce(a)BC00.XXXXXXXXXXXXXX
CSeq: 125698370 INVITE
Accept: application/sdp
Allow: INVITE,ACK,OPTIONS,BYE,CANCEL,UPDATE
P-Charging-Vector:
icid-value=B0912C3D70-0720-09394507;icid-generated-at=BC00.XXXXXXXXXXXXXX.XX
;orig-ioi=MXXXXXXXXXXXXXX
Content-Type: application/sdp
Contact: <sip:172.16.45.65:5060;transport=UDP>
Content-Length: 268
v=0
o=- 5838243 5838244 IN IP4 BC00.XXXXXXXXXXXXXX
s=-
c=IN IP4 172.16.45.144
t=0 0
a=sendrecv
m=audio 47588 RTP/AVP 18 96
c=IN IP4 172.16.45.144
a=rtpmap:18 G729/8000
a=fmtp:18 annexb=yes
a=rtpmap:96 telephone-event/8000
a=fmtp:96 0-15
a=maxptime:20
Following is the header of the sent ACK packet:
Request-Line: ACK sip:172.16.45.65:5060;transport=UDP SIP/2.0
Record-Route: <sip:X.X.X.X:5065;lr;ftag=XQBQNjvjgp4Ze>
Via: SIP/2.0/UDP
X.X.X.X:5065;branch=z9hG4bK2959.871535fd341bbe3099d0bf60d6460e18.0
Via: SIP/2.0/UDP
X.X.X.X;received=X.X.X.X;rport=5060;branch=z9hG4bKQUpy0jy90etjc
Max-Forwards: 69
From: <sip:+4444331234567@X.X.X.X;user=phone>;tag=XQBQNjvjgp4Ze
To: <sip:+905362695933@172.16.45.65;user=phone>;tag=12033368836000
Call-ID: CbeX8453909200habfGhEfElPce(a)BC00.XXXXXXXXXXXXXX
CSeq: 125698370 ACK
Content-Length: 0
Where X.X.X.X is Kamailio server public IP.
Following is part of my config file :
route {
route(NATDETECT);
record_route();
if(!mf_process_maxfwd_header("10")) {
sl_send_reply("483", "Too Many Hops");
exit;
}
# Maybe some sanity_check() here.
if(has_totag()) {
if(loose_route()) {
route(DLGURI);
if(!t_relay())
sl_reply_error();
exit;
} else {
if(is_method("ACK")) {
route(DLGURI);
if(t_check_trans()) {
t_relay();
}
} else
sl_send_reply("403", "Forbidden");
}
exit;
}
.....
}
route[NATDETECT] {
#!ifdef WITH_NAT
force_rport();
if (nat_uac_test("19")) {
if (is_method("REGISTER")) {
fix_nated_register();
} else {
add_contact_alias();
}
setflag(FLT_NATS);
}
#!endif
return;
}
route[DLGURI] {
#!ifdef WITH_NAT
if(!isdsturiset()) {
handle_ruri_alias();
}
#!endif
return;
}
Can you please check why the ACK is still sent on private IP ?
Thanks
Ali Taher
"Ali Taher" < ataher(a)vanrise.com >