Linux 中获取指定网口的IP地址（c实现）

来源：互联网发布：淘宝护肤品编辑：程序博客网时间：2024/05/03 12:25

/* *功能：传入一个网口名，获取相应的IP地址 * */#include <stdio.h>#include <ifaddrs.h>#include <netinet/in.h>#include <string.h>#include <arpa/inet.h>char *interface2ip(char *infName) {        struct ifaddrs *ifAddrStruct;        void *tmpAddrPtr=NULL;        char ip[16];        memset(ip, 0, sizeof(ip));        static char infIP[16];        getifaddrs(&ifAddrStruct);        while (ifAddrStruct != NULL)        {        if (ifAddrStruct->ifa_addr->sa_family==AF_INET && 0 == strcmp(ifAddrStruct->ifa_name,infName))        {                tmpAddrPtr=&((struct sockaddr_in *)ifAddrStruct->ifa_addr)->sin_addr;                inet_ntop(AF_INET, tmpAddrPtr, ip, INET_ADDRSTRLEN);                //printf("eth0 ip :%s\n",ip);                strcpy(infIP,ip);                //printf("infIP is :%s\n",infIP);        }            ifAddrStruct=ifAddrStruct->ifa_next;        }        //free ifaddrs        freeifaddrs(ifAddrStruct);        //return 0;        return infIP;}int main(){char infName[] = "eth0";printf("the result is : %s\n",interface2ip(infName));    return 0;}

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