ioctl()获取本地网卡设备信息
睿丰德科技 专注RFID识别技术和条码识别技术与管理软件的集成项目。质量追溯系统、MES系统、金蝶与条码系统对接、用友与条码系统对接
获得eth0接口所有信息:
- #include <stdio.h>
- #include <stdlib.h>
- #include <sys/types.h>
- #include <sys/stat.h>
- #include <unistd.h>
- #include <sys/ioctl.h>
- #include <sys/socket.h>
- #include <netinet/in.h>
- #include <arpa/inet.h>
- #include <net/if.h>
- #include <string.h>
- unsigned char g_eth_name[16];
- unsigned char g_macaddr[16];
- unsigned int g_subnetmask;
- unsigned int g_ipaddr;
- unsigned int g_broadcast_ipaddr;
- //初始化网络,获取当前网络设备信息
- void init_net(void)
- {
- int i ;
- int sock;
- struct sockaddr_in sin;
- struct ifreq ifr;
- sock=socket(AF_INET, SOCK_DGRAM, 0);
- if(sock==-1)
- perror("socket");
- strcpy(g_eth_name, "eth0");
- strcpy(ifr.ifr_name, g_eth_name);
- printf("eth name:\t%s\n", g_eth_name);
- //获取并打印网卡地址
- if(ioctl(sock, SIOCGIFHWADDR, &ifr) <0 )
- perror("ioctl error\n");
- memcpy(g_macaddr, ifr.ifr_hwaddr.sa_data, 6);
- printf("local mac:\t");
- for(i=0;i<5;i++)
- printf("%.2x:", g_macaddr[i]);
- printf("%.2x\n", g_macaddr[i]);
- //获取并打印IP地址
- if(ioctl(sock, SIOCGIFADDR, &ifr)<0)
- perror("ioctl error\n");
- memcpy(&sin, &ifr.ifr_addr, sizeof(sin));
- g_ipaddr = sin.sin_addr.s_addr;
- printf("local eth0:\t%s\n", inet_ntoa(sin.sin_addr));
- //获取并打印广播地址
- if(ioctl(sock, SIOCGIFBRDADDR, &ifr)<0)
- perror("ioctl error\n");
- memcpy(&sin, &ifr.ifr_addr, sizeof(sin));
- g_broadcast_ipaddr = sin.sin_addr.s_addr;
- printf("broadcast:\t%s\n", inet_ntoa(sin.sin_addr));
- //获取并打印子网掩码
- if(ioctl(sock,SIOCGIFNETMASK,&ifr)<0)
- perror("ioctl error\n");
- memcpy(&sin, &ifr.ifr_addr, sizeof(sin));
- g_subnetmask = sin.sin_addr.s_addr;
- printf("subnetmask:\t%s\n", inet_ntoa(sin.sin_addr));
- close(sock);
- }
- int main()
- {
- //initialize
- init_net();
- //do something
- //....
- return 0;
- }
获取所有IP:
- #include <string.h>
- #include <sys/ioctl.h>
- #include <sys/socket.h>
- #include <stdlib.h>
- #include <stdio.h>
- #include <linux/if.h>
- #include <arpa/inet.h>
- int main()
- {
- int i=0;
- int sockfd;
- struct ifconf ifconf;
- unsigned char buf[512];
- struct ifreq *ifreq;
- //初始化ifconf
- ifconf.ifc_len = 512;
- ifconf.ifc_buf = buf;
- if ((sockfd = socket(AF_INET, SOCK_DGRAM, 0)) < 0)
- {
- perror("socket open failure!\n" );
- exit(1);
- }
- ioctl(sockfd, SIOCGIFCONF, &ifconf); //获取所有接口信息
- //接下来一个一个的获取IP地址
- ifreq = (struct ifreq*)buf;
- for (i=(ifconf.ifc_len/sizeof (struct ifreq)); i>0; i--)
- {
- if(ifreq->ifr_flags == AF_INET)
- {
- printf("name = [%s] " , ifreq->ifr_name);
- printf("local addr = [%s]",
- inet_ntoa(((struct sockaddr_in*)&(ifreq->ifr_addr))->sin_addr));
- printf();
- ifreq++;
- }
- }
- return 0;
- }
获取本机的IP和MAC地址:
- /* 得到本机的mac地址和ip地址 */
- int GetLocalMac ( const char *device,char *mac,char *ip )
- {
- int sockfd;
- struct ifreq req;
- struct sockaddr_in * sin;
- if ( ( sockfd = socket ( PF_INET,SOCK_DGRAM,0 ) ) ==-1 )
- {
- fprintf ( stderr,"Sock Error:%s\n\a",strerror ( errno ) );
- return ( -1 );
- }
- memset ( &req,0,sizeof ( req ) );
- strcpy ( req.ifr_name,device );
- if ( ioctl ( sockfd,SIOCGIFHWADDR, ( char * ) &req ) ==-1 )
- {
- fprintf ( stderr,"ioctl SIOCGIFHWADDR:%s\n\a",strerror ( errno ) );
- close ( sockfd );
- return ( -1 );
- }
- memcpy ( mac,req.ifr_hwaddr.sa_data,6 );
- req.ifr_addr.sa_family = PF_INET;
- if ( ioctl ( sockfd,SIOCGIFADDR, ( char * ) &req ) ==-1 )
- {
- fprintf ( stderr,"ioctl SIOCGIFADDR:%s\n\a",strerror ( errno ) );
- close ( sockfd );
- return ( -1 );
- }
- sin = ( struct sockaddr_in * ) &req.ifr_addr;
- memcpy ( ip, ( char * ) &sin->sin_addr,4 );
- return ( 0 );
- }