Linux下获得网卡MAC地址，IP地址及子网掩码

直接贴代码：

 #define MAX_NET_CARDS 16 /* local loopback interface name */ #define LOOPBACK_IF_NAME "lo" BOOL GetNicInfoForLinux() { int skfd = -1, if_cnt = 0, if_idx = 0;; struct ifreq if_buf[MAX_NET_CARDS]; struct ifconf ifc; u_int8_t mac_addr[MAC_ADDR_LEN]; u_int32_t ip = 0, netmask = 0; BOOL ip_get = FALSE, netmask_get = FALSE; struct list_head *ip_info_list = NULL; if ((skfd = socket(AF_INET, SOCK_DGRAM, 0)) < 0) { LogError("Get NIC info, Create socket error"); return FALSE; } ifc.ifc_len = sizeof(if_buf); ifc.ifc_buf = (char *)if_buf; if (!ioctl(skfd, SIOCGIFCONF, (char *)&ifc)) { if_cnt = (ifc.ifc_len) / (sizeof(struct ifreq)); for (if_idx = 0; if_idx < if_cnt; ++if_idx) { /* ignore local loopback interface */ if (strcmp(LOOPBACK_IF_NAME, if_buf[if_idx].ifr_name) == 0) continue; /* get interface flags */ if (!(ioctl(skfd, SIOCGIFFLAGS, (char *)(&if_buf[if_idx])))) { /* this interface is up and running */ if ((if_buf[if_idx].ifr_flags & IFF_UP) && (if_buf[if_idx].ifr_flags & IFF_RUNNING)) { if (!(ioctl(skfd, SIOCGIFHWADDR, (char *)(&if_buf[if_idx])))) { memcpy(mac_addr, (char *)(&(if_buf[if_idx].ifr_hwaddr.sa_data)), MAC_ADDR_LEN); /* add new NIC */ ip_info_list = AddNicToNewNicInfoList(mac_addr, MAC_ADDR_LEN, &g_newNicInfoList); } /* get ip address of this NIC */ if (!(ioctl(skfd, SIOCGIFADDR, (char *)(&if_buf[if_idx])))) { ip = ((struct sockaddr_in *)(&(if_buf[if_idx].ifr_addr)))->sin_addr.s_addr; ip_get = TRUE; } /* get ip netmask */ if (!(ioctl(skfd, SIOCGIFNETMASK, (char *)(&if_buf[if_idx])))) { netmask = ((struct sockaddr_in *)(&(if_buf[if_idx].ifr_netmask)))->sin_addr.s_addr; netmask_get = TRUE; } /* insert ip to ip list */ if ((TRUE == ip_get) && (TRUE == netmask_get)) { AddIpToIpList(ip, netmask, ip_info_list); ip_get = FALSE; netmask_get = FALSE; } } } } /* end of for (if_idx = 0; if_idx < if_cnt; ++if_idx) */ } close(skfd); return TRUE; }