#include <pcap.h> int main() { pcap_if_t *alldevs; char errbuf[PCAP_ERRBUF_SIZE];
Don’t get lost in the bpf filter syntax. Start with "arp" or "icmp" . Ping your own machine. Watch the reply appear in your callback. That’s the moment you stop trusting the network and start seeing it. jumpstart winpcap
And you need a jumpstart.
pcap_t *handle = pcap_open_live("\\Device\\NPF_{GUID}", 65536, 1, 1000, errbuf); pcap_compile(handle, &fp, "tcp", 0, PCAP_NETMASK_UNKNOWN); pcap_setfilter(handle, &fp); pcap_loop(handle, 10, packet_handler, NULL); Your packet_handler will see raw Ethernet, IP, and TCP headers. #include <pcap
