[OpenSIPS-Users] Request URI in INVITE when using proxy

[Filippo Zangheri]

Hi all,

I'm trying to make two pjsua v0.9.0 applications inter-communicate using a proxy.

My configuration is:


[SIPUA_1] <======> [Proxy] <======> [SIPUA_2]

SIP UA 1 and 2 are two instances of pjsua v0.9.0, while Proxy is OpenSIPS v1.4.2
with default configuration file.

My experiment is conducted in the loopback address space SIP UA 1 and 2 have,
respectively, address 127.0.0.100:6000 and 127.0.0.200:7000; Proxy address is
127.0.0.10:5060.

Pjsua command line is:

 $ ./pjsua-i686-pc-linux-gnu --ip-addr=127.0.0.100 --local-port=6000 --null-audio --outbound=sip:127.0.0.10
 $ ./pjsua-i686-pc-linux-gnu --ip-addr=127.0.0.200 --local-port=7000 --null-audio --outbound=sip:127.0.0.10


The problem is that when a pjsua attempts to make a call, it transmits an INVITE
request that looks like that to the proxy:


 INVITE sip:127.0.0.10 SIP/2.0
 Via: SIP/2.0/UDP 127.0.0.100:6000;rport;branch=z9hG4bKPjRbQXYA1J.-vZts25XVKp.O-DOrb8p.Oo
 Max-Forwards: 70
 From: <sip:127.0.0.100>;tag=JZb1zvxWeh2TBgacIHAZpsOlGeWI8l02
 To: sip:127.0.0.200
 Contact: <sip:127.0.0.100:6000>
 Call-ID: TyaN6HBpuEor5uhdqhmNMyqe1ajo8CBb
 CSeq: 998 INVITE
 Allow: PRACK, INVITE, ACK, BYE, CANCEL, UPDATE, SUBSCRIBE, NOTIFY, PUBLISH, REFER, MESSAGE, OPTIONS
 Supported: replaces, 100rel, norefersub
 User-Agent: PJSUA v0.9.0-release/i686-pc-linux-gnu
 Route: <sip:127.0.0.200:7000>
 Content-Type: application/sdp
 Content-Length:   456
 ...


And OpenSIPS replies this way:

 SIP/2.0 484 Address Incomplete
 Via: SIP/2.0/UDP 127.0.0.100:6000;rport=6000;branch=z9hG4bKPjRbQXYA1J.-vZts25XVKp.O-DOrb8p.Oo;received=127.0.0.10
 From: <sip:127.0.0.100>;tag=JZb1zvxWeh2TBgacIHAZpsOlGeWI8l02
 To: sip:127.0.0.200;tag=3dd80deda90f5eedcb6114bfabf113a9.8449
 Call-ID: TyaN6HBpuEor5uhdqhmNMyqe1ajo8CBb
 CSeq: 998 INVITE
 Server: OpenSIPS (1.4.2-notls (i386/linux))
 Content-Length: 0


Now, is it normal to have the proxy URI in the INVITE request 1st line, or
is pjsua completely messed-up? Or is it a special way to make an INVITE, which
OpenSIPS by default does not accept?

Have you got any hints?

Thanks in advance.
Best regards.

-- 
Filippo Zangheri

GPG key ID: 0x6C1F2F2F
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