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Windows DNS: only use servers from the chosen device if -e is used

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dmiller
2025-05-23 19:03:02 +00:00
parent d59349fe99
commit 0f48a510eb
1 changed files with 13 additions and 2 deletions
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15
nmap_dns.cc
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@@ -1039,9 +1039,20 @@ void win32_get_servers() {
error("Unable to get DNS servers: %08x", ret); error("Unable to get DNS servers: %08x", ret);
return; return;
} }
char pcap_name[1024];
const char *pcap_guid = NULL;
if (*o.device && DnetName2PcapName(o.device, pcap_name, sizeof(pcap_name))) {
// pcap_guid is the AdapterName for the requested adapter.
pcap_guid = strchr(pcap_name, '{');
}
for (IP_ADAPTER_ADDRESSES *a = &advec[0]; a != NULL; a = a->Next) { for (IP_ADAPTER_ADDRESSES *a = &advec[0]; a != NULL; a = a->Next) {
if (a->OperStatus != IfOperStatusUp) if (a->OperStatus != IfOperStatusUp)
continue; continue;
// If user requested an interface with -e,
// don't use DNS servers configured on other interfaces.
if (pcap_guid && 0 != strcasecmp(a->AdapterName, pcap_guid))
continue;
for (IP_ADAPTER_DNS_SERVER_ADDRESS_XP *d = a->FirstDnsServerAddress; for (IP_ADAPTER_DNS_SERVER_ADDRESS_XP *d = a->FirstDnsServerAddress;
d != NULL; d = d->Next) { d != NULL; d = d->Next) {
const sockaddr_storage* ss = (sockaddr_storage*)d->Address.lpSockaddr; const sockaddr_storage* ss = (sockaddr_storage*)d->Address.lpSockaddr;