[Serusers] SUBSCRIBE/NOTIFY and SCS-Client; SER sends wrong To header field - sr-users

22 Apr 2004


      Hi,
I've tried to test the pa module (ser 0.8.12) in conjunction with the
SCS Client.
The SCS Client appends a special generic param: 'ScsId=ch' at the
From: header in the subscribe message. And the NOTIFY answer from
ser contains this param but omits the semicolon. So the NOTIFY message
will be treated as wrong.
The ser config for SUBSCRIBE method is straight forward:
  if (method=="SUBSCRIBE")
  {
    if (t_newtran())
    {
      handle_subscription("registrar");
    };
  }; # subscribe
The ngrep output for this transaction is:
#
U 195.4.20.71:5060 -> 194.97.99.50:5060
  SUBSCRIBE sip:snom@fn-sip.mcbone.net SIP/2.0..Via: SIP/2.0/UDP 195.4.20.71.
  .To: sip:snom@fn-sip.mcbone.net..From:  sip:aboeger@fn-sip.mcbone.net;tag
  =11b78ed1b717552;ScsId=ch..Call-ID: dc8b5b893e68391d9b2dfc807f8e3ba2..CSeq:
   1325665313 SUBSCRIBE..Max-Forwards: 70..Contact: sip:195.4.20.71..Event: p
  resence..Expires: 3600..Content-Length: 0..User-Agent: SCS/v3.1.12.33....
#
U 194.97.99.50:5060 -> 195.4.20.71:5060
  SIP/2.0 200 OK..Via: SIP/2.0/UDP 195.4.20.71..To: sip:snom@fn-sip.mcbone.ne
  t;tag=91083b2aa33cb6d5c9260125dc95d5f0-efd4..From:  <sip:aboeger@fn-sip.mcb
  one.net>;tag=11b78ed1b717552;ScsId=ch..Call-ID: dc8b5b893e68391d9b2dfc807f8
  e3ba2..CSeq: 1325665313 SUBSCRIBE..Server: Sip EXpress router (0.8.12a (i38
  6/linux))..Content-Length: 0..Warning: 392 194.97.99.50:5060 "Noisy feedbac
  k tells:  pid=26439 req_src_ip=195.4.20.71 req_src_port=5060 in_uri=sip:sno
  m@fn-sip.mcbone.net out_uri=sip:snom@fn-sip.mcbone.net via_cnt==1"....
#
U 194.97.99.50:5060 -> 195.4.20.71:5060
  NOTIFY sip:195.4.20.71 SIP/2.0..Via: SIP/2.0/UDP 194.97.99.50;branch=z9hG4b
  K6d55.e01a2e91.0..To: sip:aboeger@fn-sip.mcbone.netScsId=ch;tag=11b78ed1b
  717552..From: sip:snom@fn-sip.mcbone.net;tag=91083b2aa33cb6d5c9260125dc95d5
  f0-efd4..CSeq: 1 NOTIFY..Call-ID: dc8b5b893e68391d9b2dfc807f8e3ba2..Content
  -Length: 302..User-Agent: Sip EXpress router(0.8.12a (i386/linux))..Event:
  presence..Content-Type: application/xpidf+xml..Subscription-State: active;e
  xpires=3600....<?xml version="1.0"?>..<!DOCTYPE presence PUBLIC "//IETF//DT
  D RFCxxxx XPIDF 1.0//EN" "xpidf.dtd">..<presence>..<presentity uri="sip:sno
  m@fn-sip.mcbone.net;method=SUBSCRIBE"/>..<atom id="9r28r49">..<address uri=
  "sip:snom@fn-sip.mcbone.net">..<status status="closed"/>..</address>..</ato
  m>..</presence>..
#
U 195.4.20.71:5060 -> 194.97.99.50:5060
  SIP/2.0 400 Syntax Error..Call-ID: dc8b5b893e68391d9b2dfc807f8e3ba2..CSeq:
  1 NOTIFY..From: sip:snom@fn-sip.mcbone.net;tag=91083b2aa33cb6d5c9260125dc95
  d5f0-efd4..Via: SIP/2.0/UDP 194.97.99.50;branch=z9hG4bK6d55.e01a2e91.0..Con
  tent-Length: 136..Content-Type: text/plain....While parsing "To": header ex
  pected CRLF.. Missing or invalid To header.. Missing or invalid To header..
   Missing or invalid To header..
#
For me it seems to be an error in ser. Have anyone an idea for a workaround?
Regards,
    Axel