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<p class=MsoNormal><font size=2 face="Eras Demi ITC"><span lang=EN-GB
style='font-size:10.0pt;font-family:"Eras Demi ITC"'>Hi,<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face="Eras Demi ITC"><span lang=EN-GB
style='font-size:10.0pt;font-family:"Eras Demi ITC"'>Some days ago I read the
following thread <a
href="http://www.mail-archive.com/live-devel@lists.live555.com/msg01747.html">http://www.mail-archive.com/live-devel@lists.live555.com/msg01747.html</a>
.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face="Eras Demi ITC"><span lang=EN-GB
style='font-size:10.0pt;font-family:"Eras Demi ITC"'>I have a similar problem
and I was wondering if it was a problem concerned the RTSP- protocol. It’s
important to say that I *<b><span style='font-weight:bold'>don’t use</span></b>*
the command “-t” to request TCP connection.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face="Eras Demi ITC"><span lang=EN-GB
style='font-size:10.0pt;font-family:"Eras Demi ITC"'>I know that, typically, </span></font><font
size=2 color=black face="Eras Demi ITC"><span lang=EN style='font-size:10.0pt;
font-family:"Eras Demi ITC";color:black'>RTSP uses TCP as its transport protocol,
on port 554. All I do is running my openRTSP-project on windows platform and observing
the state of the network.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=black face="Eras Demi ITC"><span lang=EN
style='font-size:10.0pt;font-family:"Eras Demi ITC";color:black'>The result is
that:<o:p></o:p></span></font></p>
<p class=MsoNormal style='margin-left:36.0pt;text-indent:-18.0pt;mso-list:l0 level1 lfo1'><![if !supportLists]><font
size=2 color=black face="Eras Demi ITC"><span lang=EN style='font-size:10.0pt;
font-family:"Eras Demi ITC";color:black'><span style='mso-list:Ignore'>-<font
size=1 face="Times New Roman"><span style='font:7.0pt "Times New Roman"'>
</span></font></span></span></font><![endif]><font size=2 color=black
face="Eras Demi ITC"><span lang=EN style='font-size:10.0pt;font-family:"Eras Demi ITC";
color:black'>The Teardown operation is executed perfectly: I obtain the correct
reply from the client (RTSP/1.0 200 ok). But during the teardown- request I find
a problem in server request, concerning a possible “TCP checksum offload”
(observed it with Wireshark program).<o:p></o:p></span></font></p>
<p class=MsoNormal style='margin-left:36.0pt;text-indent:-18.0pt;mso-list:l0 level1 lfo1'><![if !supportLists]><font
size=2 face="Eras Demi ITC"><span lang=EN-GB style='font-size:10.0pt;
font-family:"Eras Demi ITC"'><span style='mso-list:Ignore'>-<font size=1
face="Times New Roman"><span style='font:7.0pt "Times New Roman"'>
</span></font></span></span></font><![endif]><font size=2 color=black
face="Eras Demi ITC"><span lang=EN style='font-size:10.0pt;font-family:"Eras Demi ITC";
color:black'>After this operation, my client and server communicate between
them on TCP protocol to close connection (I suppose), but I still find the same
problem about the checksum, still on the server-side.</span></font><font
size=2 face="Eras Demi ITC"><span lang=EN-GB style='font-size:10.0pt;
font-family:"Eras Demi ITC"'><o:p></o:p></span></font></p>
<p class=MsoNormal style='margin-left:36.0pt;text-indent:-18.0pt;mso-list:l0 level1 lfo1'><![if !supportLists]><font
size=2 face="Eras Demi ITC"><span lang=EN-GB style='font-size:10.0pt;
font-family:"Eras Demi ITC"'><span style='mso-list:Ignore'>-<font size=1
face="Times New Roman"><span style='font:7.0pt "Times New Roman"'>
</span></font></span></span></font><![endif]><font size=2 face="Eras Demi ITC"><span
lang=EN-GB style='font-size:10.0pt;font-family:"Eras Demi ITC"'>Then, I control
the state of the network using the command “netstat –na” and
find that a connection between client and server on TCP remains in “TIME_WAIT”
state, for a few minutes…<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face="Eras Demi ITC"><span lang=EN-GB
style='font-size:10.0pt;font-family:"Eras Demi ITC"'>So, is this behaviour
normal/correct? If not, what could be the problem?<o:p></o:p></span></font></p>
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