linux c语言 开发板所有网卡名及IP

 linux c语言 开发板所有网卡名及IP

#include <arpa/inet.h>
#include <sys/socket.h>
#include <netdb.h>
#include <ifaddrs.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>

int
main(int argc, char *argv[])
{
    struct ifaddrs *ifaddr, *ifa;
    int family;
    //char host[NI_MAXHOST];

    if (getifaddrs(&ifaddr) == -1)
    {
        perror("getifaddrs");
        exit(EXIT_FAILURE);
    }

    for (ifa = ifaddr; ifa != NULL; ifa = ifa->ifa_next) {
       if (ifa->ifa_addr == NULL)
           continue;

        family = ifa->ifa_addr->sa_family;

        if (family == AF_INET)
        {
            printf("interfac: %s, ip: %s\n", ifa->ifa_name, inet_ntoa(((struct sockaddr_in*)ifa->ifa_addr)->sin_addr));
        }
   }

   freeifaddrs(ifaddr);
   exit(EXIT_SUCCESS);
}

//指定ip

//@netName 指定网卡名 比如eth0
//@outIp 得到的ip
//return 1成功  0失败
int getIp(char *netName,char *outIp)
{
    struct ifaddrs *ifaddr, *ifa;
    int family;
    //char host[NI_MAXHOST];

    if (getifaddrs(&ifaddr) == -1)
    {
        perror("getifaddrs\n");

        return 0;
    }

    for (ifa = ifaddr; ifa != NULL; ifa = ifa->ifa_next) {
       if (ifa->ifa_addr == NULL)
           continue;

        family = ifa->ifa_addr->sa_family;

        if (family == AF_INET)
        {
			if(strcmp(netName,ifa->ifa_name)==0)
			{
        		printf("interfac: %s, ip: %s\n", ifa->ifa_name, inet_ntoa(((struct sockaddr_in*)ifa->ifa_addr)->sin_addr));
				sprintf(outIp,inet_ntoa(((struct sockaddr_in*)ifa->ifa_addr)->sin_addr));
				freeifaddrs(ifaddr);
				return 1;
			}
        }
   }

   freeifaddrs(ifaddr);
   return 0;
}