[reSIProcate] assert in sendToWire

[Daniel Pocock]

Byron Campen wrote:
>     This is a bug that was noticed a little while back. It was 
> occurring when repro was trying to retransmit an ACK before the DNS 
> lookup for the first had completed. (This can happen easily if we get 
> multiple responses rapidly, or the DNS servers are being very slow) 
> This bug was uncovered in repro due to the fact that it had previously 
> been putting a different tid on each ACK, meaning that a separate 
> TransactionState was being maintained for each ACK, so we never had a 
> second ACK hitting the same TransactionState to trigger the bug. I'll 
> look into fixing this.
>

Thanks for the quick response - I can confirm that my DNS is 
occasionally a little slow, the machine in question is about to get a 
memory upgrade.



> Best regards,
> Byron Campen
>
>>
>>
>> On Saturday, I updated to the latest version of reSIProcate from SVN 
>> (6901).
>>
>> Since then, I've been getting this assert() occasionally:
>>
>>    else // reuse the last dns tuple
>>    {
>>       assert(sip->isRequest());
>>       assert(mTarget.getType() != UNKNOWN_TRANSPORT);  // line 1761 ****
>>       if (resend)
>>       {
>>          if (mTarget.transport)
>>
>> Does anyone have any ideas about the cause of this?
>>
>> #0  0xb7343947 in raise () from /lib/tls/libc.so.6
>> (gdb) bt
>> #0  0xb7343947 in raise () from /lib/tls/libc.so.6
>> #1  0xb7345212 in abort () from /lib/tls/libc.so.6
>> #2  0xb733d05f in __assert_fail () from /lib/tls/libc.so.6
>> #3  0xb7d3d95b in resip::TransactionState::sendToWire (this=0xb6968c00,
>>     msg=0xb6985e18, resend=false) at TransactionState.cxx:1761
>> #4  0xb7d40344 in resip::TransactionState::processStateless
>> (this=0xb6968c00,
>>     message=0xb6985e18) at TransactionState.cxx:523
>> #5  0xb7d443e3 in resip::TransactionState::process 
>> (controller=@0xb725eb8c)
>>     at TransactionState.cxx:262
>> #6  0xb7d338aa in resip::TransactionController::process 
>> (this=0xb725eb8c,
>>     fdset=@0xbfffdcd0) at TransactionController.cxx:83
>>
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>