Re: gnugk stable 2.3.5 crash

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Jan,

there is definitely something wrong with that line. It provokes a crash even
in my pre-2.3.2. Can this happen because gnugk is trying to handle "late"
RTCP packets after a call was finished and an appropriate CallRec was
already destoyed?

-----Original Message-----
From: Jan Willamowius [mailto:jan@xxxxxxxxxxxxxx] 
Sent: Tuesday, August 16, 2011 6:49 PM
To: openh323gk-users@xxxxxxxxxxxxxxxxxxxxx
Subject: Re:  gnugk stable 2.3.5 crash

Hi Yuriy,

the crashing line is almost unchanged from the code you submitted in
2009. Its crashing in the strcmp() that compares the media IP to the
fromIP. Since the fromIP looks ok fine your core dump, maybe the media
IP gets changed that instant and we need a lock to fix that race
condition ?

Regards,
Jan


Georgiewskiy Yuriy wrote:
> hm, we use patch fo codec details which seems affect ProxyChannel.cxx line
numbers,
> it is in ProxySocket::Result UDPProxySocket::ReceiveData():
> 
> if (isRTCP && m_call && (*m_call) && m_EnableRTCPStats) {
> 	bool direct = ((*m_call)->GetSRC_media_control_IP() ==
fromIP.AsString()); <-5650 line
> 		PIPSocket::Address addr = (DWORD)0;
> 		(*m_call)->GetMediaOriginatingIp(addr);
> 		if (buflen < 4) {
> 			PTRACE(1, "RTCP\tInvalid RTCP frame");
> 			return NoData;
> 		}
> 
> 
> JW>> (gdb) bt
> JW>> #0  0x00007fbcd7fb5126 in ?? () from /lib/libc.so.6
> JW>> #1  0x00007fbcdaab56dc in PString::InternalCompare
(this=0x7fbcd4116a50, offset=0, length=2147483647, cstr=0x7fbccc0f7950
"91.210.104.61")
> JW>>      at ptlib/common/contain.cxx:1268
> JW>> #2  0x00007fbcdaab48f2 in PString::Compare (this=0x7fbcd4116a50,
obj=...) at ptlib/common/contain.cxx:970
> JW>> #3  0x00000000004b8dee in PObject::operator== (this=0x7fbcd4116a50,
obj=...) at /usr/local/src/ptlib-2.8.4/include/ptlib/object.h:1162
> JW>> #4  0x00007fbcdaaaf57b in PString::operator== (this=0x7fbcd4116a50,
obj=...) at /usr/local/src/ptlib-2.8.4/include/ptlib/contain.inl:117
> JW>> #5  0x0000000000569c36 in UDPProxySocket::ReceiveData
(this=0x19fbf70) at ProxyChannel.cxx:5650

-- 
Jan Willamowius, jan@xxxxxxxxxxxxxx, http://www.gnugk.org/

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