[SR-Users] truncating sip message

ycaner yasin.caner at netgsm.com.tr
Fri Apr 8 14:19:21 CEST 2016


  
    
  
  
    Hello; 
          I saw it. it is fragmented IP and cant resolve it wireshark.
      But i cant understand one thing, First Call Flows makes
      fragmantion but second call flows doesnt fragmantaion even if it
      is larger than first call flows. 
      
      Thanks. 
    
    08.04.2016 14:40 tarihinde Andres-27
      [via SIP Router] yazdı: 
    
    
      
      On 4/8/16 5:27 AM, ycaner wrote: 
      
      
        
        Hello Daniel; 
              source and destination is different machines and ips. they
          are sniffed by tshark and they are the same and truncated. 
        
      Maybe they are not
        truncated by rather fragmented.  If you are capturing packets by
        UDP Port you will not see the fragments.  Try to capture again
        by IP only and you will see all packets. 
           i tried to remove
          all extra addes  , include Record-Route and send messsage , no
          truncate. and then started to add headers and BOOM. after 5
          headers , it is truncated. configuration become simple to
          testing one by one. i couldnt find way to solve it. 
              i tried to sniff with tcpdump and sdp body result here ,
          truncated.; 
          
          
          
          Call Flows --- 
          
          UAC1 --> Kamailio1--->kamailio2-->UAC2  --truncated
          sdp body 
          
          UAC1 --> Kamailio2--->UAC2              --No problem 
          
          
          
        
        Destination ip tcpdump: 
            
          host-kamailio2ip.sip-tls > uac2ip.sip: SIP, length:
          1472 
                  INVITE sip:1021uac2num at uac2ip:5060 SIP/2.0 
                  Via: SIP/2.0/UDP
          kamailio2ip:5061;branch=z9hG4bK61c7.f5edc3dbd9effe58f3d04a6b77b11f13.0 
                  Via: SIP/2.0/UDP
kamailio1:5061;rport=5061;branch=z9hG4bK61c7.189d12e4e39ec53abb760692e8a8afee.0 
                  Via: SIP/2.0/UDP
192.168.0.225:10251;received=uac1ip;branch=z9hG4bK702835784163333;rport=17762 
                  From: uac1
          <sip:uac1 at kamailio1:5061>;tag=1848614912 
                  To: "0uac2num"
          <sip:0uac2num at kamailio1;user=phone> 
                  Call-ID: 228601536217236-500684316713 at uac1ip 
                  CSeq: 2 INVITE 
                  Contact: <sip:uac1 at uac1ip:17762> 
                  Proxy-Authorization: Digest username="uac1",
          realm="kamailio1", nonce="Vwd5PlcHeBLSAh0pqSU3AvKzvNAD+QGC",
          uri="sip:0uac2num at kamailio1;user=phone",
          response="d296105a65958144cf1b60c921aef11b", algorithm=MD5 
                  Max-Forwards: 68 
                  Supported: replaces, join, path 
                  User-Agent: Fanvil C58/C58P 2.2.41.13 
                  Allow: INVITE, ACK, OPTIONS, BYE, CANCEL, REFER,
          NOTIFY, INFO, PRACK, UPDATE, MESSAGE 
                  Content-Type: application/sdp 
                  Content-Length: 276 
                  P-Provider:kamailio1 
                  P-Unique:srid-5707759b-29c4-1 
                  atik:1231345123 
                  atik2:1231345123 
                  atik3:1231345123 
                  atik4:1231345123 
                  atik5:1231345123 
          
                  v=0 
                  o=8503027337 2007313085 1038110647 IN IP4
          192.168.0.225 
                  s=A conversation 
                  c=IN IP4 192.168.0.225 
                  t=0 0 
                  m=audio 10208 RTP/AVP 8 0 18 101 
                  a=rtpmap:8 PCMA/8000 
                  a=rtpmap:0 PCMU/8000 
                  a=rtpmap:18 G729/8000 
                  a=rtpmap:101 telephone-event/8000 
                  a=fmtp:1[|sip] 
          
          
        
        08.04.2016 12:03 tarihinde
          Daniel-Constantin Mierla-6 [via SIP Router] yazdı: 
        
        
          
          Hello, 
          
          how did you asserted the fact that the message is truncated?
          Is the next SIP hop not retrieving it with full content? Or
          just you looked at some traces on the net, if this one, note
          that some network sniffing tools are having their limitations
          in what they display. 
          
          Daniel 
          
          On 08/04/16 09:30, ycaner wrote: 
          
          
            
            Hello Daniel; 
              
                  in request route when invite comes, a header is added
              like P-SrcUserid. when i added new header , it truncate
              sdpbody. before t_relay(), i try to remove header, and it
              didnt. main problem is why truncates sdpbody when i added
              new header? 
              
              Thanks. 
              
              
              Works fine sip messages: http://pastebin.com/t7v9c2vW 
              removes coming headers cfg,but i couldnt remove P-Provider and P-Uniqueid
              : http://pastebin.com/9tB7Lx3U 
              
              truncateting sip message : http://pastebin.com/DNuuJxhM 
            
            removes coming
                headers cfg,but i couldnt remove P-Provider and
                P-Uniqueid  and
                added P-SrcUserid : http://pastebin.com/XxhcV55v 
            
            08.04.2016 09:22 tarihinde
              Daniel-Constantin Mierla-6 [via SIP Router] yazdı: 
            
            
              Hello, 
              
              On 08/04/16 08:06, ycaner wrote: 
              > Hello; 
              > i think i found problem. it is textops
              module.Appending new header doesnt 
              > increase content length. in addition , remove_hf
              doesnt work correctly that 
              > doesnt remove headers. 
              > 
              the value of content lenght is about the body size, it is
              not affected 
              by new headers or removing old headers. 
              
              What do you mean by remove_hf() is not working? How you
              try it? Can you 
              send here how you use remove_hf() in config and the
              incoming, plus the 
              outgoing sip message? 
              
              Cheers, 
              Daniel 
              
              -- 
              Daniel-Constantin Mierla 
              http://www.asipto.com 
              http://twitter.com/#!/miconda  -




              http://www.linkedin.com/in/miconda 
              Kamailio World Conference, Berlin, May 18-20, 2016 - http://www.kamailioworld.com 
              
              
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Daniel-Constantin Mierla
http://www.asipto.com 
http://twitter.com/#!/miconda  - http://www.linkedin.com/in/miconda 
Kamailio World Conference, Berlin, May 18-20, 2016 - http://www.kamailioworld.com 
          
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