Hi, tips for WinPcap users.Whenever you use WinPcap, you are forced to select a
specific network adapter to capture packets.This sample shows you how to select
the best network adapter automatically by using "GetBestInteface" win32 API.I
wish I could help you.Thank you.
pcap_if_t* findBestAdapter(PIP_ADAPTER_INFO allIPAdaptersInfo, pcap_if_t*
alldevs){ DWORD bestIfIndex; IPAddr ipAddr = htonl(0x08080808); // "8.8.8.8"
is well-knowon Google DNS Server IP. DWORD res = GetBestInterface(ipAddr,
&bestIfIndex); if (res != NO_ERROR) { printf("GetBestInterface return %d",
res); return NULL; } PIP_ADAPTER_INFO p = allIPAdaptersInfo; while (p !=
NULL) { if (bestIfIndex == p->Index) break; p = p->Next; } if (p ==
NULL) { printf("Can not find appropriate system adapter\n"); return
NULL; } pcap_if_t *d = alldevs; while (d != NULL) { if (strstr(d->name,
p->AdapterName) != NULL) break; } if (d == NULL) { printf("Can not
find appropriate winpcap adapter\n"); return NULL; } return d;}
You can download samples at http://www.gilgil.net/3550 .
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