Igor:
I believe I have seen the sniffer work, yes. I start
Kaboodle up, with a new registry, with one of my usual network
devices off. After Kaboodle finishes network discovery, I turn
the device on. Kaboodle detects the arrival...so it must be
sniffing for the arrival.
The most relevant documentation is here:
http://winpcap.polito.it/docs/pcapman.htm
According to it...pcap_lookupdev() returns a pointer to
a network device suitable for use with pcap_open_live(). If there
is an error, NULL is returned. But...pcap_open_live(), which is
used to obtain a packet capture descriptor to look at packets on
the network, can take a device argument of "any" or NULL to capture
packets from all interfaces.
VK: could you take a quick look into the bug that
Igor is identifying? Thanks.
-Scott
On Thu, 19 Sep 2002, Igor Kotelevsky wrote:
> Hello, Scott
>
> >Igor:
> >So just to confirm...the LAN detection process checks
> >all interfaces now, and it now keeps track of which class-C ranges
> >are the "active ranges"? Please let me know if/when these changes
> >are in the CVS server.
>
> Yes, LAN detection process checks all interfaces now.
> It pings it's own class-C ranges on start-up. And it is supposed to ping
> all newly sniffed class-C ranges on StartPing(PING_ON_NEW_DEVICE_DISCOVERY).
> The problem is that the sniffer would work at all. I wonder if anybody has
> ever seen it work?
>
> I found some info on the pcap lib used in the CSnifferThread class:
> http://www.vspu.ac.ru/en/man2html?pcap?3
> It says:
> pcap_lookupdev() returns a pointer to a network device suitable for use with
> pcap_open_live() and pcap_lookupnet().
>
> Which should be understood only as returns a pointer to only ONE (active)
> network device, not array.
>
> In file snifferthread.cpp there is a function CreateAdapterNameList which
> treats it as a null-separated chain of names.
>
> temp = (WCHAR *)device;
> while (*temp != 0 )
> {
> wcscpy((WCHAR *)adapterName, temp);
> temp += wcslen(temp);
> temp++;
> m_iAdapterNum++;
> }
>
> Is that right? I would not mind this if it had worked. But
> I tested it on two machines (2000 and W98) and in both cases I had
> m_iAdapterNum == 0. Later on, if I force the SnifferThreadFunction
> to be called, it makes a call to
> pcap_t* devHandle = p_pcap_open_live(device,BUFSIZ,1,0,errbuf);
> and errbuf contains the following error text:
> "Error opening adapter. The system cannot find the file specified".
>
> -Igor
>
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