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<p class=MsoNormal><span style='font-size:10.5pt;font-family:"Calibri","sans-serif";
color:#1F497D'>FYI: be careful with the MAC address you choose.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.5pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:10.5pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Any MAC address with the <u>0x01</u> bit on in the <u>first byte</u>
is considered an <i><u>all-stations</u></i><u> <i>broadcast</i></u><i>.</i><o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.5pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:10.5pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Is that what you actually intended to do? Send 10,000
packets to ALL/every network adapter on your local network?? (if your
host has more than one network adapter on the same physical network segment
then they’ll <i>both</i> receive every packet.)<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.5pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:10.5pt;font-family:"Calibri","sans-serif";
color:#1F497D'>If you need a MAC address to test with, the IANNA has reserved the
range 00-00-5E-00-00-00 through 00-00-5E-FF-FF-FF just for that purpose.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.5pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:10.5pt;font-family:"Calibri","sans-serif";
color:#1F497D'>See the section “IANA ETHERNET ADDRESS BLOCK - UNICAST USE”
(about 0.75 of the way down the web page) in the following document:<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.5pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal style='text-indent:.5in'><span style='font-size:10.5pt;
font-family:"Calibri","sans-serif";color:#1F497D'> <a
href="http://www.iana.org/assignments/ethernet-numbers">http://www.iana.org/assignments/ethernet-numbers</a><o:p></o:p></span></p>
<div>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
style='font-size:7.5pt;font-family:"Arial","sans-serif";color:black'>-- </span><span
style='color:#1F497D'><br>
</span><span style='font-size:13.5pt;font-family:"Arial","sans-serif";
color:black'> "</span><b><span style='font-family:"Arial","sans-serif";
color:green'>Fish</span></b><span style='font-size:13.5pt;font-family:"Arial","sans-serif";
color:black'>"</span><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:black'> (</span><span style='font-size:10.0pt;font-family:"Comic Sans MS";
color:purple'>David B. Trout</span><span style='font-size:10.0pt;font-family:
"Arial","sans-serif";color:#1F497D'>)</span><span style='color:#1F497D'> <br>
</span><span style='font-size:10.0pt;font-family:"Verdana","sans-serif";
color:#1F497D'> </span><span style='color:#1F497D'> </span><u><span
style='font-size:10.0pt;font-family:"Arial","sans-serif";color:blue'>fish@softdevlabs.com</span></u><span
style='color:#1F497D'><o:p></o:p></span></p>
</div>
<p class=MsoNormal><span style='font-size:10.5pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<div style='border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in 4.0pt'>
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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 [mailto:winpcap-users-bounces@winpcap.org] <b>On
Behalf Of </b>Alimjan Kuramshin<br>
<b>Sent:</b> Saturday, September 18, 2010 2:33 PM<br>
<b>To:</b> winpcap-users@winpcap.org<br>
<b>Subject:</b> [Winpcap-users] WinPCAP packets capture delay..<br>
<b>Importance:</b> High<o:p></o:p></span></p>
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<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Hello!<o:p></o:p></p>
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<p class=MsoNormal><o:p> </o:p></p>
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<div>
<p class=MsoNormal>Gianluca, can u run this code on Your machine and running
the Wireshark save the log and send it to me, please..<o:p></o:p></p>
</div>
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<p class=MsoNormal>Is there any delays, i mean delays between the packets that
Wireshark (winpcap) capture?<o:p></o:p></p>
</div>
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<p class=MsoNormal><o:p> </o:p></p>
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<p class=MsoNormal>P.S. code from WinPcap documentation, sending packets, not
one, but 10000 (or 1000000)..<o:p></o:p></p>
</div>
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<p class=MsoNormal><o:p> </o:p></p>
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<div><pre><span class=preprocessor>#include <stdlib.h></span><o:p></o:p></pre><pre><span
class=preprocessor>#include <stdio.h></span><o:p></o:p></pre><pre><o:p> </o:p></pre><pre><span
class=preprocessor>#include <pcap.h></span><o:p></o:p></pre><pre><o:p> </o:p></pre><pre><o:p> </o:p></pre><pre><span
class=keywordtype>void</span> main(<span class=keywordtype>int</span> argc, <span
class=keywordtype>char</span> **argv)<o:p></o:p></pre><pre>{<o:p></o:p></pre><pre><a
href="http://www.winpcap.org/docs/docs_412/html/group__wpcap__def.html#ga4711d025f83503ce692efa5e45ec60a7"
title="Descriptor of an open capture instance. This structure is opaque to the user, that...">pcap_t</a> *fp;<o:p></o:p></pre><pre><span
class=keywordtype>char</span> errbuf[<a
href="http://www.winpcap.org/docs/docs_412/html/group__wpcap__def.html#gacd448353957d92c98fccc29e1fc8d927"
title="Size to use when allocating the buffer that contains the libpcap errors.">PCAP_ERRBUF_SIZE</a>];<o:p></o:p></pre><pre>u_char packet[100];<o:p></o:p></pre><pre><span
class=keywordtype>int</span> i;<o:p></o:p></pre><pre>volatile int n_pkts = 10000; // 1000000<o:p></o:p></pre><pre><o:p> </o:p></pre><pre> <span
class=comment>/* Check the validity of the command line */</span><o:p></o:p></pre><pre> <span
class=keywordflow>if</span> (argc != 2)<o:p></o:p></pre><pre> {<o:p></o:p></pre><pre> printf(<span
class=stringliteral>"usage: %s interface (e.g. 'rpcap://eth0')"</span>, argv[0]);<o:p></o:p></pre><pre> <span
class=keywordflow>return</span>;<o:p></o:p></pre><pre> }<o:p></o:p></pre><pre> <o:p></o:p></pre><pre> <span
class=comment>/* Open the output device */</span><o:p></o:p></pre><pre> <span
class=keywordflow>if</span> ( (fp= <a
href="http://www.winpcap.org/docs/docs_412/html/group__wpcapfunc.html#ga2b64c7b6490090d1d37088794f1f1791"
title="Open a generic source in order to capture / send (WinPcap only) traffic.">pcap_open</a>(argv[1], <span
class=comment>// name of the device</span><o:p></o:p></pre><pre> 65536, <span
class=comment>// portion of the packet to capture (only the first 100 bytes)</span><o:p></o:p></pre><pre> <a
href="http://www.winpcap.org/docs/docs_412/html/group__remote__open__flags.html#ga9134ce51a9a6a7d497c3dee5affdc3b9"
title="Defines if the adapter has to go in promiscuous mode.">PCAP_OPENFLAG_PROMISCUOUS</a>, <span
class=comment>// promiscuous mode</span><o:p></o:p></pre><pre> 1000, <span
class=comment>// read timeout</span><o:p></o:p></pre><pre> NULL, <span
class=comment>// authentication on the remote machine</span><o:p></o:p></pre><pre> errbuf <span
class=comment>// error buffer</span><o:p></o:p></pre><pre> ) ) == NULL)<o:p></o:p></pre><pre> {<o:p></o:p></pre><pre> fprintf(stderr,<span
class=stringliteral>"\nUnable to open the adapter. %s is not supported by WinPcap\n"</span>, argv[1]);<o:p></o:p></pre><pre> <span
class=keywordflow>return</span>;<o:p></o:p></pre><pre> }<o:p></o:p></pre><pre><o:p> </o:p></pre><pre> <span
class=comment>/* Supposing to be on ethernet, set mac destination to 1:1:1:1:1:1 */</span><o:p></o:p></pre><pre> packet[0]=1;<o:p></o:p></pre><pre> packet[1]=1;<o:p></o:p></pre><pre> packet[2]=1;<o:p></o:p></pre><pre> packet[3]=1;<o:p></o:p></pre><pre> packet[4]=1;<o:p></o:p></pre><pre> packet[5]=1;<o:p></o:p></pre><pre> <o:p></o:p></pre><pre> <span
class=comment>/* set mac source to 2:2:2:2:2:2 */</span><o:p></o:p></pre><pre> packet[6]=2;<o:p></o:p></pre><pre> packet[7]=2;<o:p></o:p></pre><pre> packet[8]=2;<o:p></o:p></pre><pre> packet[9]=2;<o:p></o:p></pre><pre> packet[10]=2;<o:p></o:p></pre><pre> packet[11]=2;<o:p></o:p></pre><pre> <o:p></o:p></pre><pre> <span
class=comment>/* Fill the rest of the packet */</span><o:p></o:p></pre><pre> <span
class=keywordflow>for</span>(i=12;i<100;i++)<o:p></o:p></pre><pre> {<o:p></o:p></pre><pre> packet[i]=(u_char)i;<o:p></o:p></pre><pre> }<o:p></o:p></pre><pre><o:p> </o:p></pre><pre> while (n_pkts--)<o:p></o:p></pre><pre> <span
class=comment>/* Send down the packet */</span><o:p></o:p></pre><pre> <span
class=keywordflow>if</span> (<a
href="http://www.winpcap.org/docs/docs_412/html/group__wpcapfunc.html#ga51dbda0f1ab9da2cfe49d657486d50b2"
title="Send a raw packet.">pcap_sendpacket</a>(fp, packet, 100 <span
class=comment>/* size */</span>) != 0)<o:p></o:p></pre><pre> {<o:p></o:p></pre><pre> fprintf(stderr,<span
class=stringliteral>"\nError sending the packet: %s\n"</span>, <a
href="http://www.winpcap.org/docs/docs_412/html/group__wpcapfunc.html#ga81305cb154e4497e95bbb9b708631a3a"
title="return the error text pertaining to the last pcap library error.">pcap_geterr</a>(fp));<o:p></o:p></pre><pre> <span
class=keywordflow>return</span>;<o:p></o:p></pre><pre> }<o:p></o:p></pre><pre><o:p> </o:p></pre><pre> <span
class=keywordflow>return</span>;<o:p></o:p></pre><pre>}<o:p></o:p></pre><pre>/* EOF */<o:p></o:p></pre><pre>Thanks, bye..<o:p></o:p></pre><pre><o:p> </o:p></pre>
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