[Fwd: Re: [Serusers] no SRV query after rewriting R-URI?] - sr-users

31 Jan 2006

I've forgot to cc the list.

klaus

--------------------------------------------------------------------------

Hi Alan!

That's the correct behaviour. Please read RFC 3263. If the URI contains a
port, e.g. inside.acme.com:5060 there must not be an SRV lookup. Because
the SRV lookup leads to a port, which is already defined.

regards
klaus

On Tue, January 31, 2006 20:28, alan chiu said:
...
  Server: Sip EXpress router (0.8.12 (i86pc/solaris))

 when endpoint sends 18005551212(a)sip.acme.com, SER
 (without rewriting of R-URI, looks it up with SRV
 ***************

 386.656875 192.168.1.246 -> 10.100.0.111 SIP/SDP
 Request: INVITE sip:18005551212@sip.acme.com, with
 session description
 386.657307 10.100.0.111 -> 192.168.1.246 SIP Status:
 100 trying -- your call is important to us
  88.811658 10.100.0.111 -> 192.168.1.11 DNS Standard
 query SRV _sip._udp.sip.acme.com
  98.825208 192.168.1.11 -> 10.100.0.111 DNS Standard
 query response, No such name
  98.825496 10.100.0.111 -> 192.168.1.11 DNS Standard
 query A sip.acme.com
 108.845136 192.168.1.11 -> 10.100.0.111 DNS Standard
 query response, No such name
 108.845468 10.100.0.111 -> 192.168.1.11 DNS Standard
 query AAAA sip.acme.com
 118.865215 192.168.1.11 -> 10.100.0.111 DNS Standard
 query response, No such name
 416.711408 10.100.0.111 -> 192.168.1.246 SIP Status:
 478 Unresolveable destination (478/TM)
 407.921364 192.168.1.246 -> 10.100.0.111 SIP Request:
 ACK sip:18005551212@sip.acme.com

 ***********************************************************************************

 *************
 after rewritehostport("inside.acme.com:5060"), SER
 only does an A lookup
 ***************

 424.851557 192.168.1.246 -> 10.100.0.111 SIP/SDP
 Request: INVITE sip:18005551212@nat.foo.com, with
 session descripti
 on
 415.971953 10.100.0.111 -> 192.168.1.246 SIP Status:
 100 trying -- your call is important to us
 127.006508 10.100.0.111 -> 192.168.1.11 DNS Standard
 query A inside.foo.com
 127.007557 192.168.1.11 -> 10.100.0.111 DNS Standard
 query response A 192.168.1.211
 424.853464 10.100.0.111 -> 192.168.1.211 SIP/SDP
 Request: INVITE sip:18005551212@inside.foo.com:5060,
 with session descriptio
 n
 415.973466 10.100.0.111 -> 192.168.1.211 SIP/SDP
 Request: INVITE sip:18005551212@inside.foo.com:5060,
 with session descriptio
 n

 ******************************************************************

 How can I get SER to consistently do SRV lookup after
 rewriting of R-URI?

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