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<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Hi there Gianluca. One down side of this approach is that it is
Windows specific because it of the WaitForMultipleObjects. If we wanted code
that was cross-platform, would having one thread per adapter be the right
approach? Also, do you think there is any difference in efficiency between the
two approaches?<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Thanks in advance<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
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<div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'>
<p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span
style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>
winpcap-users-bounces@winpcap.org <b>On Behalf Of </b>Gianluca Varenni<br>
<b>Sent:</b> Friday, May 02, 2008 7:07 PM<br>
<b>To:</b> winpcap-users@winpcap.org<br>
<b>Subject:</b> Re: [Winpcap-users] Getting problem related to timeout in
pcap_next_exfunction<o:p></o:p></span></p>
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<p class=MsoNormal><o:p> </o:p></p>
<div>
<p class=MsoNormal><span style='font-size:10.0pt'>I would probably set
an 0 read timeout opening the adapter (pcap_open_live, to_ms = -1), ask
for the HANDLEs with pcap_gethandle() and then use WaitForMultipleObjects to
wait for the reception of packets on either interface. From there you need to
intertwine the packets coming from the two interfaces into a single file.
Actually, if you are just capturing to file, doesn't it make more sense to
capture on two different files, and then merge them? The only caveat to this
approach is that if you are working on high speed networks, you probably want
to dump the two files on two completely separate hard drives.</span><o:p></o:p></p>
</div>
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<p class=MsoNormal> <o:p></o:p></p>
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<div>
<p class=MsoNormal><span style='font-size:10.0pt'>Hope it helps</span><o:p></o:p></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:10.0pt'>GV</span><o:p></o:p></p>
</div>
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<p class=MsoNormal> <o:p></o:p></p>
</div>
<blockquote style='border:none;border-left:solid black 1.5pt;padding:0in 0in 0in 4.0pt;
margin-left:3.75pt;margin-top:5.0pt;margin-right:0in;margin-bottom:5.0pt'>
<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>-----
Original Message ----- <o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal style='background:#E4E4E4'><b><span style='font-size:10.0pt;
font-family:"Arial","sans-serif"'>From:</span></b><span style='font-size:10.0pt;
font-family:"Arial","sans-serif"'> <a href="mailto:agupta@devfoundry.com"
title="agupta@devfoundry.com">Ashok Gupta</a> <o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>To:</span></b><span
style='font-size:10.0pt;font-family:"Arial","sans-serif"'> <a
href="mailto:winpcap-users@winpcap.org" title="winpcap-users@winpcap.org">winpcap-users@winpcap.org</a>
<o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Sent:</span></b><span
style='font-size:10.0pt;font-family:"Arial","sans-serif"'> Tuesday, April 29,
2008 9:49 AM<o:p></o:p></span></p>
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<div>
<p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Subject:</span></b><span
style='font-size:10.0pt;font-family:"Arial","sans-serif"'> [Winpcap-users]
Getting problem related to timeout in pcap_next_exfunction<o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><o:p> </o:p></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Hi
All,</span><o:p></o:p></p>
</div>
<div>
<p class=MsoNormal> <o:p></o:p></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>I
am making a program that takes packet from two network interface(using
networktap) and mix them in a file on timestamp basis.</span><o:p></o:p></p>
</div>
<div>
<p class=MsoNormal> <o:p></o:p></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>I
am getting a problem when one of interface card not capture data it wait for
timeout period and it get delay to my program.</span><o:p></o:p></p>
</div>
<div>
<p class=MsoNormal> <o:p></o:p></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>I
have tried with setting timeout to -1 but still getting same problem.</span><o:p></o:p></p>
</div>
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<p class=MsoNormal> <o:p></o:p></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>please
provide a solution so I can make my program faster in this situation.</span><o:p></o:p></p>
</div>
<div>
<p class=MsoNormal> <o:p></o:p></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Thanks
in advance</span><o:p></o:p></p>
</div>
<div>
<p class=MsoNormal> <o:p></o:p></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Ashok
Gupta</span><o:p></o:p></p>
</div>
</blockquote>
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