嵌入式 hi3518平台获取网络环境中的ip、netmask、broadcast等信息
简介：
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/********************************** (C) COPYRIGHT *******************************
* File Name : get_netinfo.
- <span style="font-family:Courier New;">
- /********************************** (C) COPYRIGHT *******************************
- * File Name : get_netinfo.c
- * Author : skdkjzz
- * Date : 2014/08/07
- * Description : linux下获取网卡信息
- *********************************************************************************/
-
- #include <stdio.h>
- #include <stdlib.h>
- #include <string.h>
- #include <sys/types.h>
- #include <sys/socket.h>
- #include <netinet/in.h>
- #include <linux/if.h>
- #include <arpa/inet.h>
- #include <linux/sockios.h>
-
- int main(int argc,char*argv[]){
- int s;
- int err;
- s=socket(AF_INET,SOCK_DGRAM,0);
- if(s<0){
- perror("socket error");
- return;
- }
-
- struct ifreq ifr;
- #if 1
- memset(&ifr,0,sizeof(ifr));
- ifr.ifr_ifindex=1; /* 获得第1个网络接口的名称 */
-
- err=ioctl(s,SIOCGIFNAME,&ifr);
- if(err)
- {
- perror("index error");
- }else
- {
- printf("----------------------------------\n");
- printf("The %dst net device is : %s\n",ifr.ifr_ifindex,ifr.ifr_name);
- }
-
- err=ioctl(s,SIOCGIFHWADDR,&ifr); /* 获得MAC地址 */
- printf("%s:[%d] err is %d\n",__FUNCTION__,__LINE__,err);
- if(!err)
- {
- unsigned char* hw=ifr.ifr_hwaddr.sa_data;
- printf("Mac address is : %02x:%02x:%02x:%02x:%02x:%02x\n",hw[0],hw[1],hw[2],hw[3],hw[4],hw[5]);
- }
- else
- {
- printf("Mac address is : 00:00:00:00:00:00\n");
- }
-
- struct sockaddr_in *sin=(struct sockaddr_in*)&ifr.ifr_addr; /* 获取网络接口IP保存的是二进制IP */
- char ip[16]; /* 字符数组，存放字符串 */
- memset(ip,0,16);
- err=ioctl(s,SIOCGIFADDR,&ifr);
- if(!err)
- {
- inet_ntop(AF_INET,&sin->sin_addr.s_addr,ip,16); /* 转换的字符串保存到ip数组中，第二个参数是要转换的二进制IP指针，第三个参数是转换完成存放IP的缓冲区，最后一个参数是缓冲区的长度 */
- printf("IP address is : %s\n",ip);
- }else
- {
- printf("IP address is : 0.0.0.0\n");
- }
-
- err=ioctl(s,SIOCGIFBRDADDR,&ifr); /* 得到接口的广播地址 */
- if(!err)
- {
- struct sockaddr_in *broadcast=(struct sockaddr_in*)&ifr.ifr_broadaddr;
-
- inet_ntop(AF_INET,&broadcast->sin_addr.s_addr,ip,16); /* 转换成字符串,inet_ntop将二进制IP转换成点分十进制的字符串 */
- printf("BROADCAST IP is : %s\n",ip);
- }else
- {
- printf("BROADCAST IP is : 0.0.0.0\n",ip);
- }
- printf("----------------------------------\n");
-
- #else
-
- memset(&ifr,0,sizeof(ifr));
- ifr.ifr_ifindex=2; /* 获得第2个网络接口的名称 */
-
- err=ioctl(s,SIOCGIFNAME,&ifr);
- memcpy(ifr.ifr_name,argv[1],5);
- if(err){
- perror("index error");
- }else{
- printf("The %dst net device is : %s\n",ifr.ifr_ifindex,ifr.ifr_name);
- }
-
-
- err=ioctl(s,SIOCGIFHWADDR,&ifr); /* 获得MAC地址 */
- if(!err){
- unsigned char* hw=ifr.ifr_hwaddr.sa_data;
- printf("Mac address is : %02x:%02x:%02x:%02x:%02x:%02x\n",hw[0],hw[1],hw[2],hw[3],hw[4],hw[5]);
- }else{
- printf("Mac address is : 00:00:00:00:00:00\n");
- }
-
- sin=(struct sockaddr_in*)&ifr.ifr_addr;
- memset(ip,0,16);
- err=ioctl(s,SIOCGIFADDR,&ifr);
- if(!err){
- inet_ntop(AF_INET,&sin->sin_addr.s_addr,ip,16);
- printf("IP address is : %s\n",ip);
- }else{
- printf("IP address is : 0.0.0.0\n");
- }
-
- err=ioctl(s,SIOCGIFBRDADDR,&ifr); /* 得到接口的广播地址 */
- if(!err){
- struct sockaddr_in *broadcast=(struct sockaddr_in*)&ifr.ifr_broadaddr;
- inet_ntop(AF_INET,&broadcast->sin_addr.s_addr,ip,16);/* 转换成字符串,inet_ntop将二进制IP转换成点分十进制的字符串 */
- printf("BROADCAST IP is : %s\n",ip);
- }else{
- printf("BROADCAST IP is : 0.0.0.0\n",ip);
- }
- #endif
-
- printf("----------------------------------\n");
- close(s);
-
- }
- </span>
