Szenario:
UA(Grandstream) => PROXY(SER) => GATEWAY(*) => PSTN
After sending the SIP ACK From Gateway (*)
ACK sip:[EMAIL PROTECTED] SIP/2.0
Via: SIP/2.0/UDP 127.0.0.1;branch=z9hG4bK86c0bd474ea746b5
From: "Me" <sip:[EMAIL PROTECTED]>;tag=0f63d269bc25545d
To: <sip:[EMAIL PROTECTED]>;tag=as05df60b5
Contact: <sip:[EMAIL PROTECTED]>
Call-ID: [EMAIL PROTECTED]
CSeq: 0 ACK
^^^
User-Agent: Grandstream 1.0.4.39
Warning: 399 192.168.0.1 "detected firewall/NAT type is full cone"
Max-Forwards: 68
Allow: INVITE,ACK,CANCEL,BYE,NOTIFY,REFER,OPTIONS,INFO,SUBSCRIBE
Content-Length: 0
The * Channels hangs up:
[EMAIL PROTECTED] headers, 0 lines
[EMAIL PROTECTED]> ^MNEW_HANGUP DEBUG: Calling q931_hangup, ourstate Active,
peerstate Connect Request
^@> Protocol Discriminator: Q.931 (8) len=9
^@> Call Ref: len= 2 (reference 280/0x118) (Originator)
^@> Message type: DISCONNECT (69)
^@> Cause (len= 2) [ Ext: 1 Coding: CCITT (ITU) standard (0) 0: 0
Location: Private network serving the local user (1)
^@> Ext: 1 Cause: Normal Clearing (16), class = Normal
Event (1) ]
^@ -- Hungup 'Zap/9-1'
Is this a * Problem? Looking into the Sources shows(chan_sip.c):
else if (!strcasecmp(cmd, "ACK")) {
/* Uhm, I haven't figured out the point of the ACK yet. Are we
supposed to retransmit responses until we get an ack?
Make sure this is on a valid call */
__sip_ack(p, seqno, 1);
if (strlen(get_header(req, "Content-Type"))) {
if (process_sdp(p, req))
return -1;
}
if (!p->lastinvite && !strlen(p->randdata))
^^^^^^^^^^^^^^
p->needdestroy = 1;
}
Could it be, that * hangs up while getting zero as p->lastresult (CSeq
== 0 )?
Also it looks like a bug in the grandstreamfirmware sending CSeq zero?
would something like this solve the Problem?
if (!p->lastinvite >= 0 && !strlen(p->randdata))
^^^^^
?
Best Regards
Markus
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