[Serusers] alias

Greg Fausak lgfausak at august.net
Sun May 18 06:30:48 CEST 2003


SER Users:

I'm having some problems with aliasing.
I think it is from a mis-behaving client, but I
would appreciate comments if anybody has some insight!

I have a user_id registering as 4695466417, I can call this
number from other SIP devices and from my PSTN gateway.

I set an alias for this user '233200'.  The alias table
is updated, and the packet is forwarded correctly to the
device at 4695466417.  That device is returning a 486 busy.

Here is the invite packet:
U 216.87.144.205:5060 -> 216.87.145.28:5060
  INVITE sip:4695466417 at 192.168.2.23:5060 SIP/2.0..Max-Forwards: 10..Rec
  ord-Route: <sip:PPCprotectedClient797115 at 216.87.144.205:5060>,<sip:233
  200 at 216.87.144.203;branch=0>..Via: SIP/2.0/UDP 216.87.144.205:5060;bra
  nch=PPCprotectedClient797115,SIP/2.0/UDP 216.87.144.203;branch=z9hG4bK
  5819.87aaef61.0,SIP/2.0/UDP 216.87.145.22:5060..From: greg fausak <sip
  :230057 at addaline.com>;tag=247809120..To: <sip:233200 at addaline.com>..Co
  ntact: <sip:230057 at 216.87.145.22:5060>..Call-ID: 54D527FD-3383-4A70-97
  D8-E80324106BF0 at 216.87.145.22..CSeq: 31104 INVITE..Authorization: Dige
  st username="230057",realm="addaline.com",nonce="3ec70a8b000000003b186
  6260d18b11488734cf3ee902282",response="f517708e3fc30b2feb733dbe2fa7585
  0",uri="sip:233200 at addaline.com"..Content-Type: application/sdp..User-
  Agent: Addaline build 1002..Content-Length: 275....v=0..o=230057 37866
  6493 378666493 IN IP4 216.87.144.205..s=Addaline..c=IN IP4 216.87.144.
  205..t=0 0..m=audio 39258 RTP/AVP 0 3 98 97 101..a=rtpmap:0 pcmu/8000.
  .a=rtpmap:3 gsm/8000..a=rtpmap:98 iLBC..a=rtpmap:97 speex/8000..a=rtpm
  ap:101 telephone-event/8000..a=fmtp:101 0-15..

(sorry about the formatting)

Here is the response:

U 216.87.145.28:5060 -> 216.87.144.205:5060
  SIP/2.0 486 Busy Here..From: greg fausak <sip:230057 at addaline.com> ;ta
  g=247809120..To: <sip:233200 at addaline.com> ;tag=c0a80217-13c4-3ec70960
  -e8d5-51a5..Call-ID: 54D527FD-3383-4A70-97D8-E80324106BF0 at 216.87.145.2
  2..CSeq: 31104 INVITE..Via: SIP/2.0/UDP 216.87.144.205:5060 ;branch=PP
  CprotectedClient797115..Via: SIP/2.0/UDP 216.87.144.203 ;branch=z9hG4b
  K5819.87aaef61.0..Via: SIP/2.0/UDP 216.87.145.22:5060..User-Agent: FXS
  _GW (3502a-sip0402.BIN)..Content-Length:0....

If I do an INVITE directly to 4695466417 it works.  The only difference
in the INVITE packet seems to be the To: <sip:233200 at addaline.com> or
To: <sip:4695466417 at addaline.com>.  Is this client misbehaving?

Thanks,
---greg




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