int main() { struct pcap_pkthdr header; const u_char *packet; char errbuf[PCAP_ERRBUF_SIZE]; char *device; pcap_t *pcap_handle; int i; device = pcap_lookupdev(errbuf); if(device == NULL) pcap_fatal("pcap_lookupdev", errbuf); printf("Sniffing on device %s\n", device); pcap_handle = pcap_open_live(device, 4096, 1, 0, errbuf); if(pcap_handle == NULL) pcap_fatal("pcap_open_live", errbuf); for(i=0; i < 3; i++) { packet = pcap_next(pcap_handle, &header); printf("Got a %d byte packet\n", header.len); dump(packet, header.len); } pcap_close(pcap_handle); }
int main() { struct pcap_pkthdr cap_header; const u_char *packet, *pkt_data; char errbuf[PCAP_ERRBUF_SIZE]; char *device; pcap_t *pcap_handle; device = pcap_lookupdev(errbuf); if(device == NULL) pcap_fatal("pcap_lookupdev", errbuf); printf("スニッフィング対象: %s\n", device); pcap_handle = pcap_open_live(device, 4096, 1, 0, errbuf); if(pcap_handle == NULL) pcap_fatal("pcap_open_live", errbuf); pcap_loop(pcap_handle, 3, caught_packet, NULL); pcap_close(pcap_handle); }