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<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US">Hi Sven,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US">I have an application where I am using npcap and I also have the need to detect the media status changes. To do that I
query NDIS to get that information: <a href="https://msdn.microsoft.com/en-us/library/windows/hardware/ff569604(v=vs.85).aspx">
https://msdn.microsoft.com/en-us/library/windows/hardware/ff569604(v=vs.85).aspx</a><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US">Here is an example:<o:p></o:p></span></p>
<p class="MsoNormal" style="text-indent:35.4pt;text-autospace:none"><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:blue;mso-fareast-language:EN-US">if</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";mso-fareast-language:EN-US">(IoctlNdisQueryGlobalStats(Iface->IOCTLhandler,
OID_GEN_MEDIA_CONNECT_STATUS, &ConnectedState, <span style="color:blue">sizeof</span>(ConnectedState), (PUINT)&ReturnedCount) == ERROR_SUCCESS)<o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";mso-fareast-language:EN-US">
</span><span style="font-size:10.0pt;font-family:"Courier New";mso-fareast-language:EN-US">{<o:p></o:p></span></p>
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<span style="color:blue">return</span> ConnectedState == NdisMediaStateConnected;<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New";mso-fareast-language:EN-US"> }<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New";mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US">Hope this information could be helpful.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Trebuchet MS",sans-serif;color:black">Melhores Cumprimentos / Best Regards<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Trebuchet MS",sans-serif;color:black">Nuno Antonio Dias Ferreira<br>
Unidade de Automação de Sistemas de Energia / Power System Automation Unit<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Trebuchet MS",sans-serif;color:black">Efacec Energia, Máquinas e Equipamentos Elétricos, S.A.<br>
</span><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><img border="0" width="107" height="44" id="Picture_x0020_3" src="cid:image002.jpg@01D15FFA.18F817F0" alt="EFA Logo"></span><span style="font-size:8.0pt;font-family:"Trebuchet MS",sans-serif;color:black"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:8.0pt;font-family:"Trebuchet MS",sans-serif;color:black"><a href="http://efacec.com/email.jpg" title="Disclaimer Efacec">Disclaimer</a><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><b><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif">From:</span></b><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif"> winpcap-users-bounces@winpcap.org [mailto:winpcap-users-bounces@winpcap.org]
<b>On Behalf Of </b>?????V5<br>
<b>Sent:</b> 5 de fevereiro de 2016 04:44<br>
<b>To:</b> winpcap-users@winpcap.org<br>
<b>Subject:</b> Re: [Winpcap-users] Windows 10 support for WinPcap<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">On Fri, Feb 5, 2016 at 3:56 AM, Mark Pizzolato - Winpcap-Users <<a href="mailto:winpcap-users-20040408@subscriptions.pizzolato.net" target="_blank">winpcap-users-20040408@subscriptions.pizzolato.net</a>> wrote:<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">The inverted call model might be useful in an abstract way to get notified of a media
</span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">state change, however, the question then comes back to how to convey that detail
</span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">to the application which is using the libpcap APIs.
</span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"> </span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Since the only APIs that an application which already has a pcap session opened
</span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">is using are: pcap_next_ex, pcap_dispatch, pcap_loop and possibly
</span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">pcap_sendpacket</span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"> </span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">pcap_next_ex, pcap_dispatch and pcap_loop are defined to return -1 on an error.
</span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Is media state change an error?</span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"> Is media offline an error?</span><span lang="EN-US"><o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">I prefer to use the phrases in ncpa.cpl.<o:p></o:p></p>
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<p class="MsoNormal">If the adapter disconnects (like Wi-Fi), libpcap API should only report time-out (you don't get any new packets).<o:p></o:p></p>
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<p class="MsoNormal">If the adapter is disabled, libpcap API may report error (or time-out)? I didn't try this. One thing for sure is that you can't get new packets too. This thing should not happen when using Npcap/WinPcap. Because when listing adapters with
Npcap/WinPcap, disabled adapters never show up on the list. So Npcap/WinPcap assumes that the adapters it uses is always kept as enabled.<o:p></o:p></p>
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<p class="MsoNormal"> <o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"> </span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">pcap_sendpacket is defined to return -1 if a packet wasn’t successfully sent.</span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"> It would seem that returning -1 when the media is offline makes sense</span><span lang="EN-US"><o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">This makes sense to me.<o:p></o:p></p>
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<p class="MsoNormal"> <o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"> </span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">I don’t know for sure how WinPcap behaves under these conditions, but it
</span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">seems that it npcap should reliably report errors under the media offline state.</span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Is there a reason it can’t?</span><span lang="EN-US"><o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Npcap actually doesn't report errors any better than WinPcap. There's even a chance that Npcap behaves different on reporting errors with WinPcap. Because Npcap uses NDIS6 and WinPcap uses NDIS5.<o:p></o:p></p>
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<p class="MsoNormal"> <o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><a name="-1382340311__MailEndCompose"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"> </span></a><span lang="EN-US"><o:p></o:p></span></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><b><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif">From:</span></b><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif">
<a href="mailto:winpcap-users-bounces@winpcap.org" target="_blank">winpcap-users-bounces@winpcap.org</a> [mailto:<a href="mailto:winpcap-users-bounces@winpcap.org" target="_blank">winpcap-users-bounces@winpcap.org</a>]
<b>On Behalf Of </b>Jiyang Hu<br>
<b>Sent:</b> Thursday, February 4, 2016 11:18 AM<br>
<b>To:</b> <a href="mailto:winpcap-users@winpcap.org" target="_blank">winpcap-users@winpcap.org</a><br>
<b>Subject:</b> Re: [Winpcap-users] Windows 10 support for WinPcap</span><span lang="EN-US"><o:p></o:p></span></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US"> <o:p></o:p></span></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;background:white">
<span lang="EN-US" style="font-family:"Helvetica",sans-serif;color:black">@Sven: you need something called - Inverted Call Model</span><span lang="EN-US"><o:p></o:p></span></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;background:white">
<span lang="EN-US" style="font-family:"Helvetica",sans-serif;color:black"> </span><span lang="EN-US"><o:p></o:p></span></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;margin-bottom:12.0pt;background:white">
<span lang="EN-US" style="font-family:"Helvetica",sans-serif;color:black"><a href="https://www.osr.com/nt-insider/2013-issue1/inverted-call-model-kmdf/" target="_blank">The Inverted Call Model in KMDF - OSR</a></span><span lang="EN-US"><o:p></o:p></span></p>
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<span style="font-size:1.0pt"> </span><o:p></o:p></p>
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<a href="https://www.osr.com/nt-insider/2013-issue1/inverted-call-model-kmdf/" target="_blank"><span style="border:solid windowtext 1.0pt;padding:0cm;text-decoration:none"><img border="0" width="168" height="168" id="_x0000_i1025" src="cid:image003.jpg@01D15FFA.18F817F0" alt="Image removed by sender. image"></span></a><o:p></o:p></p>
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<span style="font-size:1.0pt"> </span><o:p></o:p></p>
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<span style="font-size:14.0pt"> </span><o:p></o:p></p>
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<span style="font-size:6.0pt"> </span><o:p></o:p></p>
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<span style="font-size:20.0pt"> </span><o:p></o:p></p>
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<span style="font-size:1.0pt"> </span><o:p></o:p></p>
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<span style="font-family:"Georgia",serif"><a href="https://www.osr.com/nt-insider/2013-issue1/inverted-call-model-kmdf/" target="_blank"><span style="font-size:13.5pt;color:black;text-decoration:none">The Inverted Call Model in KMDF - OSR</span></a></span><o:p></o:p></p>
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<span style="font-size:10.0pt;font-family:"Georgia",serif;color:#999999">One of the most common questions we see from students, clients, and new Windows driver Read more</span><o:p></o:p></p>
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on <b>www.osr.com</b></span></a></span><o:p></o:p></p>
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<span style="font-size:7.0pt;font-family:"Arial",sans-serif;color:#999999">Preview by Yahoo</span><o:p></o:p></p>
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<span lang="EN-US" style="font-family:"Helvetica",sans-serif;color:black"> </span><span lang="EN-US"><o:p></o:p></span></p>
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<span lang="EN-US" style="font-family:"Helvetica",sans-serif;color:black"> </span><span lang="EN-US"><o:p></o:p></span></p>
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<span lang="EN-US" style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black">On Thursday, February 4, 2016 12:49 PM, Sven Kerschbaum <<a href="mailto:svkers@gmail.com" target="_blank">svkers@gmail.com</a>> wrote:</span><span lang="EN-US"><o:p></o:p></span></p>
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<span lang="EN-US" style="font-family:"Helvetica",sans-serif;color:black"> </span><span lang="EN-US"><o:p></o:p></span></p>
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<span lang="EN-US" style="font-family:"Helvetica",sans-serif;color:black">@Yang: It is not possible to get notifications of media state changes by the API which you proposed in your previous post. It provides only notifications about IP table changes.</span><span lang="EN-US"><o:p></o:p></span></p>
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<span lang="EN-US" style="font-family:"Helvetica",sans-serif;color:black">Am 04.02.2016 16:31 schrieb "Sven Kerschbaum" <<a href="mailto:svkers@gmail.com" target="_blank">svkers@gmail.com</a>>:</span><span lang="EN-US"><o:p></o:p></span></p>
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<span lang="EN-US" style="font-family:"Helvetica",sans-serif;color:black">Hi Yang,</span><span lang="EN-US"><o:p></o:p></span></p>
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<span lang="EN-US" style="font-family:"Helvetica",sans-serif;color:black"> </span><span lang="EN-US"><o:p></o:p></span></p>
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<span lang="EN-US" style="font-family:"Helvetica",sans-serif;color:black">thanks for providing me the detailed information about Npcap. I will definitively have a look at it and try it.</span><span lang="EN-US"><o:p></o:p></span></p>
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<span lang="EN-US" style="font-family:"Helvetica",sans-serif;color:black"> </span><span lang="EN-US"><o:p></o:p></span></p>
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<span lang="EN-US" style="font-family:"Helvetica",sans-serif;color:black">Cheers,</span><span lang="EN-US"><o:p></o:p></span></p>
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<span lang="EN-US" style="font-family:"Helvetica",sans-serif;color:black">SK</span><span lang="EN-US"><o:p></o:p></span></p>
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<span lang="EN-US" style="font-family:"Helvetica",sans-serif;color:black"> </span><span lang="EN-US"><o:p></o:p></span></p>
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<span lang="EN-US" style="font-family:"Helvetica",sans-serif;color:black"> </span><span lang="EN-US"><o:p></o:p></span></p>
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<span lang="EN-US" style="font-family:"Helvetica",sans-serif;color:black">2016-02-04 13:04 GMT+01:00
</span><span style="font-family:"Malgun Gothic",sans-serif;color:black">食肉大灰</span><span style="font-family:"Microsoft JhengHei",sans-serif;color:black">兔</span><span lang="EN-US" style="font-family:"Helvetica",sans-serif;color:black">V5 <<a href="mailto:hsluoyz@gmail.com" target="_blank">hsluoyz@gmail.com</a>>:</span><span lang="EN-US"><o:p></o:p></span></p>
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<span lang="EN-US" style="font-family:"Helvetica",sans-serif;color:black">Hi Sven,</span><span lang="EN-US"><o:p></o:p></span></p>
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<span lang="EN-US" style="font-family:"Helvetica",sans-serif;color:black"> </span><span lang="EN-US"><o:p></o:p></span></p>
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<span lang="EN-US" style="font-family:"Helvetica",sans-serif;color:black">Npcap (<a href="https://github.com/nmap/npcap" target="_blank">https://github.com/nmap/npcap</a>) has better performance because of NDIS 6. It also has several new features:</span><span lang="EN-US"><o:p></o:p></span></p>
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<span lang="EN-US" style="font-family:"Helvetica",sans-serif;color:black"> </span><span lang="EN-US"><o:p></o:p></span></p>
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<span lang="EN-US" style="font-family:"Helvetica",sans-serif;color:black"> </span><span lang="EN-US"><o:p></o:p></span></p>
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<span lang="EN-US" style="font-family:"Helvetica",sans-serif;color:black">I actually didn't add a function about making user software </span><span lang="EN-US" style="font-size:9.5pt;font-family:"Helvetica",sans-serif;color:black">getting notified about media
state changes. From my knowledge I don't know there's any support of such a function in libpcap. libpcap is an interface standard followed by WinPcap/Npcap. However, I think you can do it using native Windows APIs (like Receiving Notification of Network Events
in <a href="https://msdn.microsoft.com/en-us/library/windows/desktop/aa366334(v=vs.85).aspx" target="_blank">https://msdn.microsoft.com/en-us/library/windows/desktop/aa366334(v=vs.85).aspx</a>). And if you have any improvement advice about Npcap, I will consider
it:)</span><span lang="EN-US"><o:p></o:p></span></p>
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<span lang="EN-US" style="font-family:"Helvetica",sans-serif;color:black"> </span><span lang="EN-US"><o:p></o:p></span></p>
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<span lang="EN-US" style="font-family:"Helvetica",sans-serif;color:black"> </span><span lang="EN-US"><o:p></o:p></span></p>
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<span lang="EN-US" style="font-size:9.5pt;font-family:"Helvetica",sans-serif;color:black">Cheers,</span><span lang="EN-US"><o:p></o:p></span></p>
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<span lang="EN-US" style="font-size:9.5pt;font-family:"Helvetica",sans-serif;color:black">Yang</span><span lang="EN-US"><o:p></o:p></span></p>
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<span lang="EN-US" style="font-family:"Helvetica",sans-serif;color:black"> </span><span lang="EN-US"><o:p></o:p></span></p>
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<a href="mailto:Winpcap-users@winpcap.org">Winpcap-users@winpcap.org</a><br>
<a href="https://www.winpcap.org/mailman/listinfo/winpcap-users" target="_blank">https://www.winpcap.org/mailman/listinfo/winpcap-users</a><o:p></o:p></p>
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