Linux获取所有网口及其详细信息

来源：互联网发布：布尔型数据两个值编辑：程序博客网时间：2024/06/05 03:37

获取方法：

调用getifaddrs接口来获取，调用freeifaddrs接口来释放内存

需包含：

#include <sys/types.h>#include <ifaddrs.h>

参考代码：

#include <stdio.h>#include <stdlib.h>#include <sys/types.h>#include <sys/socket.h>#include <netdb.h>#include <ifaddrs.h>int main(int argc, char* argv[]){        struct ifaddrs *ifaddr_lst;        struct ifaddrs *ifaddr_node;        int family;        char host[NI_MAXHOST];        if(getifaddrs(&ifaddr_lst) < 0)        {                perror("getifaddrs");                return -1;        }        for(ifaddr_node = ifaddr_lst; ifaddr_node != NULL; ifaddr_node = ifaddr_node->ifa_next)        {                /* ifa_addr可能为空，*/                if(NULL == ifaddr_node->ifa_addr)                {                        continue;                }                struct sockaddr_in *addr = (struct sockaddr_in*)ifaddr_node->ifa_addr;                family = addr->sin_family;                printf("----------------------------------------\n");                printf("interface name: %s\n", ifaddr_node->ifa_name);                printf("address family: %d(%s)\n", family, (family == AF_PACKET)?"AF_PACKET":                                                (family == AF_INET)?"AF_INET":                                                (family == AF_INET6)?"AF_INET6":"");                if(family == AF_INET||family == AF_INET6)                {                        int ret = getnameinfo(ifaddr_node->ifa_addr, (family == AF_INET)?sizeof(struct sockaddr_in):sizeof(struct sockaddr_in6), host, NI_MAXHOST, NULL, 0, NI_NUMERICHOST);                        if( ret != 0 )                        {                                printf("getnameinfo failed:%s\n", strerror(ret));                                return -1;                        }                        printf("address: %s\n", host);                }                printf("----------------------------------------\n");        }        freeifaddrs(ifaddr_lst);        return 0;}

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