Hi Sorry for the late reply, I observed this issue when testing with broken TLS UA, which was sending CRLF in two packets instead of double CRLF in a single packet. It is very easy to recreate using openssl s_client command , where kamailio as server openssl s_client -connect 192.168.2.151:5061 -CAfile serverCA.pem -crlf After the connection established by the client, Press enter key two times from the key board, which will send CRLF in two packet to server and You would see CRLF replied back by Kamailio Note:-crlf will send CR as CRLF in a single packet to server. Thanks Jijo On Sat, Mar 10, 2012 at 6:27 AM, Daniel-Constantin Mierla <miconda(a)gmail.com > Hello, > > looking at the code, it seems that CRLF is sent only after CRLFCRLF. Can > you get a pcap for your case? > > Cheers, > Daniel > > On Tue, Feb 28, 2012 at 5:28 PM, Jijo <realjijo(a)gmail.com> >> Hi All. >> >> As per the tcp_crlf_ping description, kamailio shall reply CRLF only when >> it receives "CRLF CRLF". But In the 3.1.0 version, if kamailio recieves >> "CRLF", it respond back CRLF. Is this an expected behavior or an error? >> >> Thanks >> Jijo >> >> _______________________________________________ >> SIP Express Router (SER) and Kamailio (OpenSER) - sr-users mailing list >> sr-users(a)lists.sip-router.org >> http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users >> >> > > > -- > Daniel-Constantin Mierla > http://www.asipto.com >

Hello, Yes it is sending CRLF after the second CRLF from client. Another thing is, Kamailio would send CRLF even if the second CRLF come after few seconds. I believe we don't have any way to drop it ? Thanks Jijo On Fri, Mar 23, 2012 at 5:34 AM, Daniel-Constantin Mierla &lt;miconda(a)gmail.com > Hello, > > is kamailio sending crlf after the second crlf from the client? > > There is no notion of a packet in a stream connection, even a sip packet > can be send char by char and the server has to assemble it by keep reading > in a local buffer until all is retrieved. > > Cheers, > Daniel > > > On 3/23/12 1:50 AM, Jijo wrote: > > Hi > > Sorry for the late reply, > > I observed this issue when testing with broken TLS UA, which was sending > CRLF in two packets instead of double CRLF in a single packet. > > It is very easy to recreate using openssl s_client command , where > kamailio as server > > openssl s_client -connect 192.168.2.151:5061 -CAfile serverCA.pem > -crlf > > > After the connection established by the client, Press enter key two > times from the key board, which will send CRLF in two packet to server and > You would see CRLF replied back by Kamailio > > Note:-crlf will send CR as CRLF in a single packet to server. > > Thanks > Jijo > > > > > > On Sat, Mar 10, 2012 at 6:27 AM, Daniel-Constantin Mierla < > miconda(a)gmail.com> >> Hello, >> >> looking at the code, it seems that CRLF is sent only after CRLFCRLF. Can >> you get a pcap for your case? >> >> Cheers, >> Daniel >> >> On Tue, Feb 28, 2012 at 5:28 PM, Jijo &lt;realjijo(a)gmail.com>> >>> Hi All. >>> >>> As per the tcp_crlf_ping description, kamailio shall reply CRLF only >>> when it receives "CRLF CRLF". But In the 3.1.0 version, if kamailio >>> recieves "CRLF", it respond back CRLF. Is this an expected behavior or an >>> error? >>> >>> Thanks >>> Jijo >>> >>> _______________________________________________ >>> SIP Express Router (SER) and Kamailio (OpenSER) - sr-users mailing list >>> sr-users(a)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 > Kamailio Advanced Training, April 23-26, 2012, Berlin, Germanyhttp://www.asipto.com/index.php/kamailio-advanced-training/ > >

There is no problem as such. On Sat, Mar 24, 2012 at 5:20 AM, Daniel-Constantin Mierla &lt;miconda(a)gmail.com > Hello, > > > On 3/23/12 3:15 PM, Jijo wrote: > > Hello, > > Yes it is sending CRLF after the second CRLF from client. > > Another thing is, Kamailio would send CRLF even if the second CRLF come > after few seconds. > > I believe we don't have any way to drop it ? > > > not really, in a stream protocol, such delays can appear due to > congestions in some routers -- the apps just have to keep reading until a > format error, packet is complete or connection is closed. Few seconds could > be very common in between parts of large sip messages. > > Are these sequential CRLFs causing problems? > > Cheers, > Daniel > > > Thanks > Jijo > > > On Fri, Mar 23, 2012 at 5:34 AM, Daniel-Constantin Mierla < > miconda(a)gmail.com> >> Hello, >> >> is kamailio sending crlf after the second crlf from the client? >> >> There is no notion of a packet in a stream connection, even a sip packet >> can be send char by char and the server has to assemble it by keep reading >> in a local buffer until all is retrieved. >> >> Cheers, >> Daniel >> >> >> On 3/23/12 1:50 AM, Jijo wrote: >> >> Hi >> >> Sorry for the late reply, >> >> I observed this issue when testing with broken TLS UA, which was >> sending CRLF in two packets instead of double CRLF in a single packet. >> >> It is very easy to recreate using openssl s_client command , where >> kamailio as server >> >> openssl s_client -connect 192.168.2.151:5061 -CAfile serverCA.pem >> -crlf >> >> >> After the connection established by the client, Press enter key two >> times from the key board, which will send CRLF in two packet to server and >> You would see CRLF replied back by Kamailio >> >> Note:-crlf will send CR as CRLF in a single packet to server. >> >> Thanks >> Jijo >> >> >> >> >> >> On Sat, Mar 10, 2012 at 6:27 AM, Daniel-Constantin Mierla < >> miconda(a)gmail.com>> >>> Hello, >>> >>> looking at the code, it seems that CRLF is sent only after CRLFCRLF. Can >>> you get a pcap for your case? >>> >>> Cheers, >>> Daniel >>> >>> On Tue, Feb 28, 2012 at 5:28 PM, Jijo &lt;realjijo(a)gmail.com>>> >>>> Hi All. >>>> >>>> As per the tcp_crlf_ping description, kamailio shall reply CRLF only >>>> when it receives "CRLF CRLF". But In the 3.1.0 version, if kamailio >>>> recieves "CRLF", it respond back CRLF. Is this an expected behavior or an >>>> error? >>>> >>>> Thanks >>>> Jijo >>>> >>>> _______________________________________________ >>>> SIP Express Router (SER) and Kamailio (OpenSER) - sr-users mailing list >>>> sr-users(a)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 >> Kamailio Advanced Training, April 23-26, 2012, Berlin, Germanyhttp://www.asipto.com/index.php/kamailio-advanced-training/ >> >> > > -- > Daniel-Constantin Mierla > Kamailio Advanced Training, April 23-26, 2012, Berlin, Germanyhttp://www.asipto.com/index.php/kamailio-advanced-training/ > >