tcpdump_获取网络设备

#include <pcap.h>#include <stdio.h>/* * 获取所有网络设备 *//* * defined in pcap.h *#define PCAP_ERRBUF_SIZE 256*//* * Item in a list of interfaces. * defined in pcap.h *struct pcap_if {struct pcap_if *next;char *name;// name to hand to "pcap_open_live()" char *description;// textual description of interface, or NULLstruct pcap_addr *addresses;bpf_u_int32 flags;// PCAP_IF_ interface flags};typedef struct pcap_if pcap_if_t;*//* * implemented in pcap_findalldevs.3pcap *int pcap_findalldevs(pcap_if_t **alldevsp, char *errbuf);*/int main(int argc, char **argv){pcap_if_t *devpointer;char ebuf[PCAP_ERRBUF_SIZE];if (pcap_findalldevs(&devpointer, ebuf) < 0) {printf("%s", ebuf);}else {for (int i = 0; devpointer != 0; i++) {printf("%d.%s", i+1, devpointer->name);if (devpointer->description != NULL)printf(" (%s)", devpointer->description);printf("/n");devpointer = devpointer->next;}}return 0;}