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Add a check for datalink before compiling filter. See #2381

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dmiller
2023-01-30 21:45:56 +00:00
parent caf1e5d299
commit 4fd9004b0b
1 changed files with 5 additions and 0 deletions
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5
scan_engine_raw.cc
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@@ -852,7 +852,12 @@ void begin_sniffer(UltraScanInfo *USI, std::vector<Target *> &Targets) {
if ((USI->pd = my_pcap_open_live(Targets[0]->deviceName(), 256, (o.spoofsource) ? 1 : 0, pcap_selectable_fd_valid() ? 200 : 2)) == NULL)
fatal("%s", PCAP_OPEN_ERRMSG);
int datalink = pcap_datalink(USI->pd);
if (datalink < 0) {
error("Warning: unable to determine data link for interface %s", Targets[0]->deviceName());
}
if (USI->ping_scan_arp) {
assert(datalink == DLT_EN10MB);
/* Some OSs including Windows 7 and Solaris 10 have been seen to send their
ARP replies to the broadcast address, not to the (unicast) address that
the request came from, therefore listening for ARP packets directed to