[SR-Users] libosip2 parse body error

[Daniel-Constantin Mierla]

On 10/27/10 6:10 PM, Jan Janak wrote:
> The hex output Tony sent is actually much more useful than plain-text
> ngrep output you're asking for because it allows you to see the
> problem--you can easily count the number of bytes in the payload.
>
> The hex output may not be for humans to read, but it is for humans to count.
>
> And it appears that he is right. I counted 200 bytes (2 + 12*16 + 6)
> in the payload while the Content-Length header says 201.
If you read the email again, then you may get what I wanted to say, I 
asked for pcap tar.gz or ngrep.

Pcap is better to import in wireshark or even ngrep where you can 
analyze thoroughly - tar.gz is recommended for pcap otherwise some email 
clients do text encoding and the format gets broken.

Ngrep is easier to read directly and discover if the sdp is altered by 
the proxy or is the one from them the phone.

Now, if it is easier for you to count hex codes by hart in a combined 
content, then it is fine. For me is easier to get the body in text 
format and use wc tool to count.

Cheers,
Daniel

> -Jan
>
> On Wed, Oct 27, 2010 at 6:27 AM, Daniel-Constantin Mierla
> <miconda at gmail.com>  wrote:
>> Never ever send private emails - they will be discarded, keep the mailing
>> list cc-ed.
>>
>> Iptel org is running SIP Express Router 3.1. Take a ngrep of the traffic and
>> send it here, the hexa codes you send are not for humans to read, like we
>> are here on mailing lists. Otherwise make a tar.gz of pcap file. SER changes
>> content length only if it is an update to sdp (for nat traversal), otherwise
>> is the one set by the other phone.
>>
>> Daniel
>>
>> On 10/27/10 12:21 PM, t wrote:
>>
>> Thanks Daniel,
>>
>> fyi, the Content-Length doesn't match the actual length in the  invite ok
>> returned from iptel.org (213.192.59.75), and the same situation also occurs
>> from ekiga.net.
>>
>> libosip2 interprets the rfc as saying that this 'should' be correct. (and I
>> buy this!).
>>
>> it looks like an openser (opensips?) quirk.
>>
>> anyway, I have put in code locally to fixup the Content-Length.
>>
>> Thanks,
>> Tony.
>>
>>    73 75 62 0d 0a 43 6f 6e 74 65 6e 74 2d 4c 65 6e sub..Content-Len
>>    67 74 68 3a 20 20 20 32 30 31 0d 0a 0d 0a 76 3d gth:   201....v=
>>    30 0d 0a 6f 3d 74 77 69 6e 6b 6c 65 20 31 33 33 0..o=twinkle 133
>>    33 37 30 37 32 38 39 20 38 30 39 37 35 37 36 37 3707289 80975767
>>    33 20 49 4e 20 49 50 34 20 31 39 32 2e 31 36 38 3 IN IP4 192.168
>>    2e 32 35 34 2e 31 0d 0a 73 3d 2d 0d 0a 63 3d 49 .254.1..s=-..c=I
>>    4e 20 49 50 34 20 31 39 32 2e 31 36 38 2e 32 35 N IP4 192.168.25
>>    34 2e 31 0d 0a 74 3d 30 20 30 0d 0a 6d 3d 61 75 4.1..t=0 0..m=au
>>    64 69 6f 20 35 30 32 32 20 52 54 50 2f 41 56 50 dio 5022 RTP/AVP
>>    20 39 38 20 31 30 31 0d 0a 61 3d 72 74 70 6d 61  98 101..a=rtpma
>>    70 3a 39 38 20 73 70 65 65 78 2f 31 36 30 30 30 p:98 speex/16000
>>    0d 0a 61 3d 72 74 70 6d 61 70 3a 31 30 31 20 74 ..a=rtpmap:101 t
>>    65 6c 65 70 68 6f 6e 65 2d 65 76 65 6e 74 2f 38 elephone-event/8
>>    30 30 30 0d 0a 61 3d 66 6d 74 70 3a 31 30 31 20 000..a=fmtp:101
>>    30 2d 31 35 0d 0a                               0-15..
>>
>> On Wed, Oct 27, 2010 at 5:40 AM, Daniel-Constantin Mierla
>> <miconda at gmail.com>  wrote:
>>> Hello,
>>>
>>> you claim that contact header is malformed or libosip2 has issues in
>>> parsing a good content header?
>>>
>>> In case of first option, can you tell what it believes is wrong. Your
>>> message is hard to follow since is not clear text, next time send only the
>>> text part.
>>>
>>> For the second option, you have to approach libosip2 support forums.
>>>
>>> Cheers,
>>> Daniel
>>>
>>> On 10/25/10 10:44 PM, t wrote:
>>>
>>> Hi,
>>>
>>> Not sure how to provide this info (or even if anybody cares), but libosip2
>>> parser objects to incorrect (short) Content-Length from iptel.org.
>>>
>>> Regards,
>>> Tony.
>>>
>>> _______________________________________________
>>> SIP Express Router (SER) and Kamailio (OpenSER) - sr-users mailing list
>>> sr-users at lists.sip-router.org
>>> http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users
>>>
>>> --
>>> Daniel-Constantin Mierla
>>> http://www.asipto.com
>> --
>> Daniel-Constantin Mierla
>> http://www.asipto.com
>>
>> _______________________________________________
>> SIP Express Router (SER) and Kamailio (OpenSER) - sr-users mailing list
>> sr-users at lists.sip-router.org
>> http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users
>>
>>
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-- 
Daniel-Constantin Mierla
http://www.asipto.com