獲取方法：

調(diào)用getifaddrs接口來獲取，調(diào)用freeifaddrs接口來釋放內(nèi)存

需包含：

#include

#include

參考代碼：

#include

#include

#include

#include

#include

#include

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可能為空，*/

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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