16 Oct
2005
16 Oct
'05
4:49 p.m.
I think that the solution is using force_tcp_alias. This would solve the
problem for the incoming bye, as ser would
search for an already open tcp connection to alice (let's hope is still
there). The phone of alice needs not know/support
connection reuse draft (ser does).
This solved a similar problem i used to have, as you pointed me. Now i do a
force_tcp_alias for all mesages going
through the config file ... probably not optimal, but my config file is
faaar from optimal :)
Regards
Cesc
On 10/15/05, Alexander Ph. Lintenhofer <lintenhofer(a)aon.at> wrote:
Hi everybody,
A short question:
alice(a)atlanta.com is behind NAT. She uses TCP to connect her UAC to
sip.atlanta.com <http://sip.atlanta.com> in the public network.
Inviting bob(a)biloxi.com suceeds. But Bob can't terminate the call. His
BYE is not routed back, because fix_nated_contact() does only work with
UDP. And Bob builds the R-URI with the Infos of Alice's contact header.
The route is as follows:
alice(a)atlanta.com [172.16.0.4 <http://172.16.0.4>] ->
natbox.atlanta.com<http://natbox.atlanta.com>[
172.16.0.1 <http://172.16.0.1> |
192.168.0.13 <http://192.168.0.13>] ->
sip.atlanta.com<http://sip.atlanta.com>[
192.168.0.14 <http://192.168.0.14>] ->
sip.biloxi.com<http://sip.biloxi.com>
[192.168.1.14 <http://192.168.1.14>] -> bob(a)biloxi.com
[192.168.1.1<http://192.168.1.1>
]
Possible solutions:
- force_tcp_alias() -> but reading the draft
draft-ietf-sip-connect-reuse-04.txt yields that this must be supported
by the components - so doesn't the snom360 of Alice
- commenting some lines in nathelper.c and activate it for TCP -> this
works pretty fine and the BYE finds its way from Bob through the NAT-Box
to Alice. But this is a dirty solution.
So does anybody has a similar problem? My config works fine with UDP but
switching to TCP makes life hard...
I attached the traces Bob received, his last BYE is finally dropped by
sip.atlanta.com <http://sip.atlanta.com>, because the network-address
172.16.0.4 <http://172.16.0.4> can't be found!
Thank you for your help!
regards, Philipp
=========================================================================
Received from tcp:192.168.1.14:5060 <http://192.168.1.14:5060> at
15/10/2005 19:18:32:250 (1751 bytes):
INVITE sip:bob@192.168.1.1:2063;transport=tcp;line=wxqurd1s SIP/2.0
Record-Route: <sip:192.168.1.14 <http://192.168.1.14>
;transport=tcp;r2=on;ftag=5s8qncdbso;lr=on>
Record-Route:
<sip:192.168.1.14:5061 <http://192.168.1.14:5061>
;transport=tls;r2=on;ftag=5s8qncdbso;lr=on>
Record-Route:
<sip:192.168.0.14:5061 <http://192.168.0.14:5061>
;transport=tls;r2=on;ftag=5s8qncdbso;lr=on>
Record-Route: <sip:192.168.0.14 <http://192.168.0.14>
;transport=tcp;r2=on;ftag=5s8qncdbso;lr=on>
Via: SIP/2.0/TCP 192.168.1.14 <http://192.168.1.14>;branch=
z9hG4bKcad9.057cd815.0;i=d
Via: SIP/2.0/TLS 192.168.0.14:5061 <http://192.168.0.14:5061>;branch=
z9hG4bKcad9.685be3c3.0;i=1
Via: SIP/2.0/TCP
172.16.0.4:2327
<http://172.16.0.4:2327>;received=192.168.0.13<http://192.168.0.13>
;branch=z9hG4bK-y79imu6dlqxs;rport=2327
From: "Alice" <sip:alice@atlanta.com>;tag=5s8qncdbso
To: <sip:bob@biloxi.com>
Call-ID: 3c2675cac832-ce5ge5sxlx2q@snom360
CSeq: 1 INVITE
Max-Forwards: 68
Contact: <sip:alice@172.16.0.4:2327;transport=tcp;line=fyyuh6tl>
P-Key-Flags: resolution="31x13", keys="4"
User-Agent: snom360/4.3
Accept: application/sdp
Allow: INVITE, ACK, CANCEL, BYE, REFER, OPTIONS, NOTIFY, SUBSCRIBE,
PRACK, MESSAGE, INFO
Allow-Events: talk, hold, refer
Supported: timer, 100rel, replaces, callerid
Session-Expires: 3600
Content-Type: application/sdp
Content-Length: 507
P-hint: outbound
P-hint: forced TLS relay
P-hint: usrloc applied
Sent to tcp:192.168.1.14:5060 <http://192.168.1.14:5060> at 15/10/2005
19:18:32:270 (929 bytes):
SIP/2.0 180 Ringing
Via: SIP/2.0/TCP 192.168.1.14 <http://192.168.1.14>;branch=
z9hG4bKcad9.057cd815.0;i=d
Via: SIP/2.0/TLS 192.168.0.14:5061 <http://192.168.0.14:5061>;branch=
z9hG4bKcad9.685be3c3.0;i=1
Via: SIP/2.0/TCP
172.16.0.4:2327
<http://172.16.0.4:2327>;received=192.168.0.13<http://192.168.0.13>
;branch=z9hG4bK-y79imu6dlqxs;rport=2327
Record-Route: <sip:192.168.1.14 <http://192.168.1.14>
;transport=tcp;r2=on;ftag=5s8qncdbso;lr=on>
Record-Route:
<sip:192.168.1.14:5061 <http://192.168.1.14:5061>
;transport=tls;r2=on;ftag=5s8qncdbso;lr=on>
Record-Route:
<sip:192.168.0.14:5061 <http://192.168.0.14:5061>
;transport=tls;r2=on;ftag=5s8qncdbso;lr=on>
Record-Route: <sip:192.168.0.14 <http://192.168.0.14>
;transport=tcp;r2=on;ftag=5s8qncdbso;lr=on>
From: "Alice" <sip:alice@atlanta.com>;tag=5s8qncdbso
To: <sip:bob@biloxi.com>;tag=fxdufnc4xz
Call-ID: 3c2675cac832-ce5ge5sxlx2q@snom360
CSeq: 1 INVITE
Contact: <sip:bob@192.168.1.1:2063;transport=tcp;line=wxqurd1s>
Allow: INVITE, ACK, CANCEL, BYE, REFER, OPTIONS, NOTIFY, SUBSCRIBE,
PRACK, MESSAGE, INFO
Allow-Events: talk, hold, refer
Content-Length: 0
Sent to tcp:192.168.1.14:5060 <http://192.168.1.14:5060> at 15/10/2005
19:18:33:390 (1377 bytes):
SIP/2.0 200 Ok
Via: SIP/2.0/TCP 192.168.1.14 <http://192.168.1.14>;branch=
z9hG4bKcad9.057cd815.0;i=d
Via: SIP/2.0/TLS 192.168.0.14:5061 <http://192.168.0.14:5061>;branch=
z9hG4bKcad9.685be3c3.0;i=1
Via: SIP/2.0/TCP
172.16.0.4:2327
<http://172.16.0.4:2327>;received=192.168.0.13<http://192.168.0.13>
;branch=z9hG4bK-y79imu6dlqxs;rport=2327
Record-Route: <sip:192.168.1.14 <http://192.168.1.14>
;transport=tcp;r2=on;ftag=5s8qncdbso;lr=on>
Record-Route:
<sip:192.168.1.14:5061 <http://192.168.1.14:5061>
;transport=tls;r2=on;ftag=5s8qncdbso;lr=on>
Record-Route:
<sip:192.168.0.14:5061 <http://192.168.0.14:5061>
;transport=tls;r2=on;ftag=5s8qncdbso;lr=on>
Record-Route: <sip:192.168.0.14 <http://192.168.0.14>
;transport=tcp;r2=on;ftag=5s8qncdbso;lr=on>
From: "Alice" <sip:alice@atlanta.com>;tag=5s8qncdbso
To: <sip:bob@biloxi.com>;tag=fxdufnc4xz
Call-ID: 3c2675cac832-ce5ge5sxlx2q@snom360
CSeq: 1 INVITE
Contact: <sip:bob@192.168.1.1:2063;transport=tcp;line=wxqurd1s>
Require: timer
Session-Expires: 3600;refresher=uac
User-Agent: snom360/4.3
Allow: INVITE, ACK, CANCEL, BYE, REFER, OPTIONS, NOTIFY, SUBSCRIBE,
PRACK, MESSAGE, INFO
Allow-Events: talk, hold, refer
Supported: timer, 100rel, replaces, callerid
Content-Type: application/sdp
Content-Length: 296
ACK sip:bob@192.168.1.1:2063;transport=tcp;line=wxqurd1s SIP/2.0
Record-Route: <sip:192.168.1.14 <http://192.168.1.14>
;transport=tcp;r2=on;ftag=5s8qncdbso;lr=on>
Record-Route:
<sip:192.168.1.14:5061 <http://192.168.1.14:5061>
;transport=tls;r2=on;ftag=5s8qncdbso;lr=on>
Record-Route:
<sip:192.168.0.14:5061 <http://192.168.0.14:5061>
;transport=tls;r2=on;ftag=5s8qncdbso;lr=on>
Record-Route: <sip:192.168.0.14 <http://192.168.0.14>
;transport=tcp;r2=on;ftag=5s8qncdbso;lr=on>
Via: SIP/2.0/TCP 192.168.1.14 <http://192.168.1.14>;branch=0;i=d
Via: SIP/2.0/TLS 192.168.0.14:5061 <http://192.168.0.14:5061>;branch=0;i=1
Via: SIP/2.0/TCP
172.16.0.4:2327
<http://172.16.0.4:2327>;received=192.168.0.13<http://192.168.0.13>
;branch=z9hG4bK-o9f1lglhf4pk;rport=2327
From: "Alice" <sip:alice@atlanta.com>;tag=5s8qncdbso
To: <sip:bob@biloxi.com>;tag=fxdufnc4xz
Call-ID: 3c2675cac832-ce5ge5sxlx2q@snom360
CSeq: 1 ACK
Max-Forwards: 68
Contact: <sip:alice@172.16.0.4:2327;transport=tcp;line=fyyuh6tl>
Content-Length: 0
P-hint: rr-enforced
P-hint: rr-enforced
Sent to tcp:192.168.1.14:5060 <http://192.168.1.14:5060> at 15/10/2005
19:18:34:480 (703 bytes):
BYE sip:alice@172.16.0.4:2327;transport=tcp;line=fyyuh6tl SIP/2.0
Via: SIP/2.0/TCP 192.168.1.1:2063 <http://192.168.1.1:2063>
;branch=z9hG4bK-gu03sll9uumm;rport
Route: <sip:192.168.1.14 <http://192.168.1.14>
;transport=tcp;r2=on;ftag=5s8qncdbso;lr=on>
Route: <sip:192.168.1.14:5061 <http://192.168.1.14:5061>
;transport=tls;r2=on;ftag=5s8qncdbso;lr=on>
Route: <sip:192.168.0.14:5061 <http://192.168.0.14:5061>
;transport=tls;r2=on;ftag=5s8qncdbso;lr=on>
Route: <sip:192.168.0.14 <http://192.168.0.14>
;transport=tcp;r2=on;ftag=5s8qncdbso;lr=on>
From: <sip:bob@biloxi.com>;tag=fxdufnc4xz
To: "Alice" <sip:alice@atlanta.com>;tag=5s8qncdbso
Call-ID: 3c2675cac832-ce5ge5sxlx2q@snom360
CSeq: 1 BYE
Max-Forwards: 70
Contact: <sip:bob@192.168.1.1:2063;transport=tcp;line=wxqurd1s>
User-Agent: snom360/4.3
Content-Length: 0
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