Callee BYE routing issue

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Kamailio as IMS (version - 5.3.3)...

Daniel W. Graham

10 Apr 2020 10 Apr '20

5:24 a.m.

Have an issue with BYE routing in a lab setup, any suggestions on what I should be looking at?

Topology:

UA1 <-> NAT device 1 <-> Proxy1 <-> Registrar/B2BUA <-> Proxy1 <-> NAT device 1 <-> UA2

All UA to UA calls flow through B2BUA.

All IP’s are public except for UA1 and UA2.

-Both endpoints can call each other. -If the caller hangs up first, BYE is routed properly. -If the callee hangs up first, BYE causes proxy to send 478.

On calls where BYE results in 478: if(!isdsturiset()) { ……….…………………….not executed handle_ruri_alias() } return;

Example issue call: UA2 to UA1, UA1 hang-up.

Apr 10 00:31:28 edgedev /usr/local/sbin/kamailio[5317]: ERROR: {1 2 BYE 24dc84a4592515245177483c2a657042@B2BUA_IP:5160} *** cfgtrace:dbg_cfg_trace(): request_route=[DLGURI] c=[/usr/local/etc/kamailio/kamailio.cfg] l=540 a=16 n=if Apr 10 00:31:28 edgedev /usr/local/sbin/kamailio[5317]: ERROR: {1 2 BYE 24dc84a4592515245177483c2a657042@B2BUA_IP:5160} *** cfgtrace:dbg_cfg_trace(): request_route=[DLGURI] c=[/usr/local/etc/kamailio/kamailio.cfg] l=532 a=24 n=isdsturiset Apr 10 00:31:28 edgedev /usr/local/sbin/kamailio[5317]: ERROR: {1 2 BYE 24dc84a4592515245177483c2a657042@B2BUA_IP:5160} *** cfgtrace:dbg_cfg_trace(): request_route=[DLGURI] c=[/usr/local/etc/kamailio/kamailio.cfg] l=540 a=2 n=return ……….. Apr 10 00:31:28 edgedev /usr/local/sbin/kamailio[5317]: ERROR: {1 2 BYE 24dc84a4592515245177483c2a657042@B2BUA_IP:5160} tm [ut.h:245]: uri2dst2(): bad_uri: [sip::;transport=] Apr 10 00:31:28 edgedev /usr/local/sbin/kamailio[5317]: ERROR: {1 2 BYE 24dc84a4592515245177483c2a657042@B2BUA_IP:5160} tm [t_fwd.c:1732]: t_forward_nonack(): failure to add branches Apr 10 00:31:28 edgedev /usr/local/sbin/kamailio[5317]: ERROR: {1 2 BYE 24dc84a4592515245177483c2a657042@B2BUA_IP:5160} *** cfgtrace:dbg_cfg_trace(): request_route=[RELAY] c=[/usr/local/etc/kamailio/kamailio.cfg] l=275 a=24 n=sl_reply_error Apr 10 00:31:28 edgedev /usr/local/sbin/kamailio[5317]: ERROR: {1 2 BYE 24dc84a4592515245177483c2a657042@B2BUA_IP:5160} sl [sl_funcs.c:401]: sl_reply_error(): stateless error reply used: Unresolvable destination (478/SL) Apr 10 00:31:28 edgedev /usr/local/sbin/kamailio[5317]: ERROR: {1 2 BYE 24dc84a4592515245177483c2a657042@B2BUA_IP:5160} *** cfgtrace:dbg_cfg_trace(): request_route=[RELAY] c=[/usr/local/etc/kamailio/kamailio.cfg] l=277 a=2 n=exit

2020/04/10 00:31:28.625060 NAT_Device_IP:57808 -> Proxy_IP:5060 BYE sip:398@B2BUA_IP:5160 SIP/2.0 Via: SIP/2.0/UDP UA1_IP:52884;branch=z9hG4bK-524287-1---43b5f31829f20952 Max-Forwards: 70 Route: sip:Proxy_IP;lr=on;ftag=as78671fd9;did=b1b.a27 Contact: sip:399@UA1_IP:52884 To: "Dan Test" sip:398@B2BUA_IP:5160;tag=as78671fd9 From: sip:399@UA1_IP:52884;rinstance=705e0af5f4be485c;alias=NAT_Device_IP:~57808~1;tag=64f4b712 Call-ID: 24dc84a4592515245177483c2a657042@B2BUA_IP:5160 CSeq: 2 BYE User-Agent: xxxxxxxxxxxxxxxx Content-Length: 0

#########################################

For comparison, here is a BYE from another test call: UA1 to UA2, UA1 hang-up.

This BYE was routed correctly.

2020/04/10 00:44:02.688608 NAT_Device_IP:57808 -> Proxy_IP:5060 BYE sip:398@B2BUA_IP:5160 SIP/2.0 Via: SIP/2.0/UDP UA1_IP:52884;branch=z9hG4bK-524287-1---ce36df02e8a80a48 Max-Forwards: 70 Route: sip:Proxy_IP;lr=on;ftag=9078f232;did=49e.8c01 Contact: sip:399@UA1_IP:52884 To: sip:398@B2BUA_IP;tag=as5874901f From: sip:399@B2BUA_IP:5060;tag=9078f232 Call-ID: 103104NGU1NjkxNGZkYmM4MzA3Y2FkMzY1OGNkZTZmMTMyZDU CSeq: 3 BYE User-Agent: xxxxxxxxxxxxxxxx Authorization: Digest username= xxxxxxxxxxxxxxxx Content-Length: 0

-dan

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Sergiu Pojoga

10 Apr 10 Apr

6:28 a.m.

From: sip:399@UA1_IP:52884;rinstance=705e0af5f4be485c; alias=NAT_Device_IP:~57808~1;tag=64f4b712

Something wrong with the above From, no closing ">", also there's no place for *alias *in From headers.

On Fri, Apr 10, 2020 at 1:25 AM Daniel W. Graham dan@cmsinter.net wrote:

...

Have an issue with BYE routing in a lab setup, any suggestions on what I should be looking at?

Topology:

UA1 <-> NAT device 1 <-> Proxy1 <-> Registrar/B2BUA <-> Proxy1 <-> NAT device 1 <-> UA2

All UA to UA calls flow through B2BUA.

All IP’s are public except for UA1 and UA2.

-Both endpoints can call each other.

-If the caller hangs up first, BYE is routed properly.

-If the callee hangs up first, BYE causes proxy to send 478.

On calls where BYE results in 478:

if(!isdsturiset()) {
……….…………………….not executed

handle_ruri_alias()
}

return;

Example issue call: UA2 to UA1, UA1 hang-up.

Apr 10 00:31:28 edgedev /usr/local/sbin/kamailio[5317]: ERROR: {1 2 BYE 24dc84a4592515245177483c2a657042@B2BUA_IP:5160} *** cfgtrace:dbg_cfg_trace(): request_route=[DLGURI] c=[/usr/local/etc/kamailio/kamailio.cfg] l=540 a=16 n=if

Apr 10 00:31:28 edgedev /usr/local/sbin/kamailio[5317]: ERROR: {1 2 BYE 24dc84a4592515245177483c2a657042@B2BUA_IP:5160} *** cfgtrace:dbg_cfg_trace(): request_route=[DLGURI] c=[/usr/local/etc/kamailio/kamailio.cfg] l=532 a=24 n=isdsturiset

Apr 10 00:31:28 edgedev /usr/local/sbin/kamailio[5317]: ERROR: {1 2 BYE 24dc84a4592515245177483c2a657042@B2BUA_IP:5160} *** cfgtrace:dbg_cfg_trace(): request_route=[DLGURI] c=[/usr/local/etc/kamailio/kamailio.cfg] l=540 a=2 n=return

………..

Apr 10 00:31:28 edgedev /usr/local/sbin/kamailio[5317]: ERROR: {1 2 BYE 24dc84a4592515245177483c2a657042@B2BUA_IP:5160} tm [ut.h:245]: uri2dst2(): bad_uri: [sip::;transport=]

Apr 10 00:31:28 edgedev /usr/local/sbin/kamailio[5317]: ERROR: {1 2 BYE 24dc84a4592515245177483c2a657042@B2BUA_IP:5160} tm [t_fwd.c:1732]: t_forward_nonack(): failure to add branches

Apr 10 00:31:28 edgedev /usr/local/sbin/kamailio[5317]: ERROR: {1 2 BYE 24dc84a4592515245177483c2a657042@B2BUA_IP:5160} *** cfgtrace:dbg_cfg_trace(): request_route=[RELAY] c=[/usr/local/etc/kamailio/kamailio.cfg] l=275 a=24 n=sl_reply_error

Apr 10 00:31:28 edgedev /usr/local/sbin/kamailio[5317]: ERROR: {1 2 BYE 24dc84a4592515245177483c2a657042@B2BUA_IP:5160} sl [sl_funcs.c:401]: sl_reply_error(): stateless error reply used: Unresolvable destination (478/SL)

Apr 10 00:31:28 edgedev /usr/local/sbin/kamailio[5317]: ERROR: {1 2 BYE 24dc84a4592515245177483c2a657042@B2BUA_IP:5160} *** cfgtrace:dbg_cfg_trace(): request_route=[RELAY] c=[/usr/local/etc/kamailio/kamailio.cfg] l=277 a=2 n=exit

2020/04/10 00:31:28.625060 NAT_Device_IP:57808 -> Proxy_IP:5060

BYE sip:398@B2BUA_IP:5160 SIP/2.0

Via: SIP/2.0/UDP UA1_IP:52884;branch=z9hG4bK-524287-1---43b5f31829f20952

Max-Forwards: 70

Route: sip:Proxy_IP;lr=on;ftag=as78671fd9;did=b1b.a27

Contact: sip:399@UA1_IP:52884

To: "Dan Test" sip:398@B2BUA_IP:5160;tag=as78671fd9

From: sip:399@UA1_IP :52884;rinstance=705e0af5f4be485c;alias=NAT_Device_IP:~57808~1;tag=64f4b712

Call-ID: 24dc84a4592515245177483c2a657042@B2BUA_IP:5160

CSeq: 2 BYE

User-Agent: xxxxxxxxxxxxxxxx

Content-Length: 0

#########################################

For comparison, here is a BYE from another test call: *UA1 to UA2, UA1 hang-up.*

This BYE was routed correctly.

2020/04/10 00:44:02.688608 NAT_Device_IP:57808 -> Proxy_IP:5060

BYE sip:398@B2BUA_IP:5160 SIP/2.0

Via: SIP/2.0/UDP UA1_IP:52884;branch=z9hG4bK-524287-1---ce36df02e8a80a48

Max-Forwards: 70

Route: sip:Proxy_IP;lr=on;ftag=9078f232;did=49e.8c01

Contact: sip:399@UA1_IP:52884

To: sip:398@B2BUA_IP;tag=as5874901f

From: sip:399@B2BUA_IP:5060;tag=9078f232

Call-ID: 103104NGU1NjkxNGZkYmM4MzA3Y2FkMzY1OGNkZTZmMTMyZDU

CSeq: 3 BYE

User-Agent: xxxxxxxxxxxxxxxx

Authorization: Digest username= xxxxxxxxxxxxxxxx

Content-Length: 0

-dan

Kamailio (SER) - Users Mailing List sr-users@lists.kamailio.org https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users

Daniel W. Graham

11 Apr 11 Apr

1:41 a.m.

I’ve tested with two different UA types and same thing happens, must be a result of the B2BUA sending the alias in the To header of the invite. Example -

2020/04/10 12:31:36.851987 Proxy_IP:5060 -> NAT_Device_IP:58090 INVITE sip:399@UA1_IP:60916;rinstance=8ec7d4acf9c3436c SIP/2.0 Record-Route: sip:Poxy_IP;lr=on;ftag=as4220330a;did=a2c.1d81 Via: SIP/2.0/UDP Proxy_IP;branch=z9hG4bKbfa9.767ffbe5f0e31be8c27932008d28844e.0 Via: SIP/2.0/UDP B2BUA_IP:5160;received= B2BUA_IP;branch=z9hG4bK22bd58aa;rport=5160 Max-Forwards: 69 From: "Dan Test" <sip:398@ B2BUA_IP:5160>;tag=as4220330a To: sip:399@UA1_IP:60916;rinstance=8ec7d4acf9c3436c;alias=NAT_Device_IP~58090~1 Contact: <sip:398@ B2BUA_IP:5160> Call-ID: 1835b7eb541743600e1b79c07615206c@ B2BUA_IP:5160 CSeq: 102 INVITE User-Agent: xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx Date: Fri, 10 Apr 2020 16:31:34 GMT Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO, PUBLISH, MESSAGE Supported: replaces, timer P-Asserted-Identity: "Dan Test" sip:398@B2BUA_IP Content-Type: application/sdp Content-Length: 566

The alias is in the contact header for the invite sent by kamailio, so everything looks fine there.

Thanks,

-dan

From: sr-users sr-users-bounces@lists.kamailio.org on behalf of Sergiu Pojoga pojogas@gmail.com Reply-To: "Kamailio (SER) - Users Mailing List" sr-users@lists.kamailio.org Date: Friday, April 10, 2020 at 2:29 AM To: "Kamailio (SER) - Users Mailing List" sr-users@lists.kamailio.org Subject: Re: [SR-Users] Callee BYE routing issue

From: sip:399@UA1_IP:52884;rinstance=705e0af5f4be485c;alias=NAT_Device_IP:~57808~1;tag=64f4b712

Something wrong with the above From, no closing ">", also there's no place for alias in From headers.

On Fri, Apr 10, 2020 at 1:25 AM Daniel W. Graham <dan@cmsinter.netmailto:dan@cmsinter.net> wrote: Have an issue with BYE routing in a lab setup, any suggestions on what I should be looking at?

Topology:

UA1 <-> NAT device 1 <-> Proxy1 <-> Registrar/B2BUA <-> Proxy1 <-> NAT device 1 <-> UA2

All UA to UA calls flow through B2BUA.

All IP’s are public except for UA1 and UA2.

-Both endpoints can call each other. -If the caller hangs up first, BYE is routed properly. -If the callee hangs up first, BYE causes proxy to send 478.

On calls where BYE results in 478: if(!isdsturiset()) { ……….…………………….not executed handle_ruri_alias() } return;

Example issue call: UA2 to UA1, UA1 hang-up.

#########################################

For comparison, here is a BYE from another test call: UA1 to UA2, UA1 hang-up.

This BYE was routed correctly.

-dan

_______________________________________________ Kamailio (SER) - Users Mailing List sr-users@lists.kamailio.orgmailto:sr-users@lists.kamailio.org https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users

Sergiu Pojoga

4:20 p.m.

I don't know mate, something wrong with your config, all I can say from the provided info is that there's no place for *alias *in From/To headers. They must be in Contact/RURI.

On Fri, Apr 10, 2020 at 9:43 PM Daniel W. Graham dan@cmsinter.net wrote:

...

I’ve tested with two different UA types and same thing happens, must be a result of the B2BUA sending the alias in the To header of the invite.

Example -

2020/04/10 12:31:36.851987 Proxy_IP:5060 -> NAT_Device_IP:58090

INVITE sip:399@UA1_IP:60916;rinstance=8ec7d4acf9c3436c SIP/2.0

Record-Route: sip:Poxy_IP;lr=on;ftag=as4220330a;did=a2c.1d81

Via: SIP/2.0/UDP Proxy_IP;branch=z9hG4bKbfa9.767ffbe5f0e31be8c27932008d28844e.0

Via: SIP/2.0/UDP B2BUA_IP:5160;received= B2BUA_IP;branch=z9hG4bK22bd58aa;rport=5160

Max-Forwards: 69

From: "Dan Test" <sip:398@ B2BUA_IP:5160>;tag=as4220330a

To: sip:399@UA1_IP :60916;rinstance=8ec7d4acf9c3436c;alias=NAT_Device_IP~58090~1

Contact: <sip:398@ B2BUA_IP:5160>

Call-ID: 1835b7eb541743600e1b79c07615206c@ B2BUA_IP:5160

CSeq: 102 INVITE

User-Agent: xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx

Date: Fri, 10 Apr 2020 16:31:34 GMT

Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO, PUBLISH, MESSAGE

Supported: replaces, timer

P-Asserted-Identity: "Dan Test" sip:398@B2BUA_IP

Content-Type: application/sdp

Content-Length: 566

The alias is in the contact header for the invite sent by kamailio, so everything looks fine there.

Thanks,

-dan

*From: *sr-users sr-users-bounces@lists.kamailio.org on behalf of Sergiu Pojoga pojogas@gmail.com *Reply-To: *"Kamailio (SER) - Users Mailing List" < sr-users@lists.kamailio.org> *Date: *Friday, April 10, 2020 at 2:29 AM *To: *"Kamailio (SER) - Users Mailing List" sr-users@lists.kamailio.org *Subject: *Re: [SR-Users] Callee BYE routing issue

From: sip:399@UA1_IP :52884;rinstance=705e0af5f4be485c;alias=NAT_Device_IP:~57808~1;tag=64f4b712

Something wrong with the above From, no closing ">", also there's no place for *alias *in From headers.

On Fri, Apr 10, 2020 at 1:25 AM Daniel W. Graham dan@cmsinter.net wrote:

Have an issue with BYE routing in a lab setup, any suggestions on what I should be looking at?

Topology:

UA1 <-> NAT device 1 <-> Proxy1 <-> Registrar/B2BUA <-> Proxy1 <-> NAT device 1 <-> UA2

All UA to UA calls flow through B2BUA.

All IP’s are public except for UA1 and UA2.

-Both endpoints can call each other.

-If the caller hangs up first, BYE is routed properly.

-If the callee hangs up first, BYE causes proxy to send 478.

On calls where BYE results in 478:

if(!isdsturiset()) {
……….…………………….not executed

handle_ruri_alias()
}

return;

Example issue call: UA2 to UA1, UA1 hang-up.

Apr 10 00:31:28 edgedev /usr/local/sbin/kamailio[5317]: ERROR: {1 2 BYE 24dc84a4592515245177483c2a657042@B2BUA_IP:5160} *** cfgtrace:dbg_cfg_trace(): request_route=[DLGURI] c=[/usr/local/etc/kamailio/kamailio.cfg] l=540 a=16 n=if

Apr 10 00:31:28 edgedev /usr/local/sbin/kamailio[5317]: ERROR: {1 2 BYE 24dc84a4592515245177483c2a657042@B2BUA_IP:5160} *** cfgtrace:dbg_cfg_trace(): request_route=[DLGURI] c=[/usr/local/etc/kamailio/kamailio.cfg] l=532 a=24 n=isdsturiset

Apr 10 00:31:28 edgedev /usr/local/sbin/kamailio[5317]: ERROR: {1 2 BYE 24dc84a4592515245177483c2a657042@B2BUA_IP:5160} *** cfgtrace:dbg_cfg_trace(): request_route=[DLGURI] c=[/usr/local/etc/kamailio/kamailio.cfg] l=540 a=2 n=return

………..

Apr 10 00:31:28 edgedev /usr/local/sbin/kamailio[5317]: ERROR: {1 2 BYE 24dc84a4592515245177483c2a657042@B2BUA_IP:5160} tm [ut.h:245]: uri2dst2(): bad_uri: [sip::;transport=]

Apr 10 00:31:28 edgedev /usr/local/sbin/kamailio[5317]: ERROR: {1 2 BYE 24dc84a4592515245177483c2a657042@B2BUA_IP:5160} tm [t_fwd.c:1732]: t_forward_nonack(): failure to add branches

Apr 10 00:31:28 edgedev /usr/local/sbin/kamailio[5317]: ERROR: {1 2 BYE 24dc84a4592515245177483c2a657042@B2BUA_IP:5160} *** cfgtrace:dbg_cfg_trace(): request_route=[RELAY] c=[/usr/local/etc/kamailio/kamailio.cfg] l=275 a=24 n=sl_reply_error

Apr 10 00:31:28 edgedev /usr/local/sbin/kamailio[5317]: ERROR: {1 2 BYE 24dc84a4592515245177483c2a657042@B2BUA_IP:5160} sl [sl_funcs.c:401]: sl_reply_error(): stateless error reply used: Unresolvable destination (478/SL)

Apr 10 00:31:28 edgedev /usr/local/sbin/kamailio[5317]: ERROR: {1 2 BYE 24dc84a4592515245177483c2a657042@B2BUA_IP:5160} *** cfgtrace:dbg_cfg_trace(): request_route=[RELAY] c=[/usr/local/etc/kamailio/kamailio.cfg] l=277 a=2 n=exit

2020/04/10 00:31:28.625060 NAT_Device_IP:57808 -> Proxy_IP:5060

BYE sip:398@B2BUA_IP:5160 SIP/2.0

Via: SIP/2.0/UDP UA1_IP:52884;branch=z9hG4bK-524287-1---43b5f31829f20952

Max-Forwards: 70

Route: sip:Proxy_IP;lr=on;ftag=as78671fd9;did=b1b.a27

Contact: sip:399@UA1_IP:52884

To: "Dan Test" sip:398@B2BUA_IP:5160;tag=as78671fd9

From: sip:399@UA1_IP :52884;rinstance=705e0af5f4be485c;alias=NAT_Device_IP:~57808~1;tag=64f4b712

Call-ID: 24dc84a4592515245177483c2a657042@B2BUA_IP:5160

CSeq: 2 BYE

User-Agent: xxxxxxxxxxxxxxxx

Content-Length: 0

#########################################

For comparison, here is a BYE from another test call: *UA1 to UA2, UA1 hang-up.*

This BYE was routed correctly.

2020/04/10 00:44:02.688608 NAT_Device_IP:57808 -> Proxy_IP:5060

BYE sip:398@B2BUA_IP:5160 SIP/2.0

Via: SIP/2.0/UDP UA1_IP:52884;branch=z9hG4bK-524287-1---ce36df02e8a80a48

Max-Forwards: 70

Route: sip:Proxy_IP;lr=on;ftag=9078f232;did=49e.8c01

Contact: sip:399@UA1_IP:52884

To: sip:398@B2BUA_IP;tag=as5874901f

From: sip:399@B2BUA_IP:5060;tag=9078f232

Call-ID: 103104NGU1NjkxNGZkYmM4MzA3Y2FkMzY1OGNkZTZmMTMyZDU

CSeq: 3 BYE

User-Agent: xxxxxxxxxxxxxxxx

Authorization: Digest username= xxxxxxxxxxxxxxxx

Content-Length: 0

-dan

Kamailio (SER) - Users Mailing List sr-users@lists.kamailio.org https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users

Kamailio (SER) - Users Mailing List sr-users@lists.kamailio.org https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users

Alex Balashov

4:24 p.m.

Indeed. The From/To headers are cosmetic in this regard; no attribute of them would cause a routing problem[1].

-- Alex

[1] Well, except for missing tags, I suppose; but even then, this would not pose a routing problem, just a dialog party identification problem to one or more UAs.

-- Alex Balashov | Principal | Evariste Systems LLC Tel: +1-706-510-6800 / +1-800-250-5920 (toll-free) Web: http://www.evaristesys.com/, http://www.csrpswitch.com/

Luis Rojas G.

12 Apr 12 Apr

4:38 a.m.

On 4/11/20 12:24 PM, Alex Balashov wrote:

...

Indeed. The From/To headers are cosmetic in this regard; no attribute of them would cause a routing problem[1].

-- Alex

[1] Well, except for missing tags, I suppose; but even then, this would not pose a routing problem, just a dialog party identification problem to one or more UAs.

Hello,

What about a syntax error in those headers?

I am curious about this :

"sip:398@ B2BUA_IP:"

Why a space after "@"?

Best regards,

Luis

-- Luis Rojas Software Architect Sixbell Los Leones 1200 Providencia Santiago, Chile Phone: (+56-2) 22001288 mailto:luis.rojas@sixbell.com http://www.sixbell.com

Alex Balashov

4:50 a.m.

That could jam the SIP parser and cause the message to be dropped, definitely.

— Sent from my iPad

...

On Apr 12, 2020, at 12:39 AM, Luis Rojas G. luis.rojas@sixbell.com wrote:

On 4/11/20 12:24 PM, Alex Balashov wrote:

...
Indeed. The From/To headers are cosmetic in this regard; no attribute of them would cause a routing problem[1].

-- Alex

[1] Well, except for missing tags, I suppose; but even then, this would not pose a routing problem, just a dialog party identification problem to one or more UAs.

Hello,

What about a syntax error in those headers?

I am curious about this :

"sip:398@ B2BUA_IP:"

Why a space after "@"?

Best regards,

Luis

-- Luis Rojas Software Architect Sixbell Los Leones 1200 Providencia Santiago, Chile Phone: (+56-2) 22001288 mailto:luis.rojas@sixbell.com http://www.sixbell.com

Kamailio (SER) - Users Mailing List sr-users@lists.kamailio.org https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users

Daniel W. Graham

13 Apr 13 Apr

1:28 p.m.

The space is just a result of me sanitizing the example.

The issue here is most certainly the way the B2BUA is handling the contact alias sent by kamailio. I will have to come up with another plan.

Thanks for the input!

-dan

On 4/12/20, 12:51 AM, "sr-users on behalf of Alex Balashov" <sr-users-bounces@lists.kamailio.org on behalf of abalashov@evaristesys.com> wrote:

That could jam the SIP parser and cause the message to be dropped, definitely.

— Sent from my iPad

> On Apr 12, 2020, at 12:39 AM, Luis Rojas G. luis.rojas@sixbell.com wrote: > > On 4/11/20 12:24 PM, Alex Balashov wrote: >> Indeed. The From/To headers are cosmetic in this regard; no attribute of >> them would cause a routing problem[1]. >> >> -- Alex >> >> [1] Well, except for missing tags, I suppose; but even then, this would >> not pose a routing problem, just a dialog party identification problem >> to one or more UAs. >> > Hello, > > What about a syntax error in those headers? > > I am curious about this : > > "sip:398@ B2BUA_IP:" > > Why a space after "@"? > > Best regards, > > Luis > > -- > Luis Rojas > Software Architect > Sixbell > Los Leones 1200 > Providencia > Santiago, Chile > Phone: (+56-2) 22001288 > mailto:luis.rojas@sixbell.com > http://www.sixbell.com > > > _______________________________________________ > Kamailio (SER) - Users Mailing List > sr-users@lists.kamailio.org > https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users

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Alex Balashov
Daniel W. Graham
Luis Rojas G.
Sergiu Pojoga