获取arp表

 

int _tmain(int argc, _TCHAR* argv[]){MIB_IPNETTABLE *ipNetTable = NULL; ULONG size = 0;DWORD result = 0;/**GetIpNetTable 要调用两次，第一次去获取需要的内存大小(size)， *（因为程序不知道arp表到底有多大，需要多少内存）*接下来根据size的值分配内存大小, 第二次调用GetIpNetTable才能获取arp表*/result = GetIpNetTable(ipNetTable, &size, TRUE);ipNetTable = (MIB_IPNETTABLE *)malloc(size);result = GetIpNetTable(ipNetTable, &size, TRUE);if(result){printf("GetIpNetTable error/n");exit(1);}int i = 0;int j = 0;IN_ADDR ip;char *titleIp = "ip address"; char *titleMac = "mac address"; printf("%-15s %s/n/n", titleIp, titleMac);for(; i < ipNetTable->dwNumEntries; i++){ip.S_un.S_addr = ipNetTable->table[i].dwAddr;printf("%-15s ", inet_ntoa(ip));//IN_ADDR转成字符串for(j = 0; j < 6; j++){printf("%2x", ipNetTable->table[i].bPhysAddr[j]);if(j != 5){printf("-");}}printf("/n");}return 0;}

在cmd下用arp -a， 查看arp表。查看程序输出的arp表是否和arp -a输出地一致