linux下获取本机ip地址，ipv4和ipv6

linux下获取本机ip地址，ipv4和ipv6

#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
int GetIP_v4_and_v6_linux(int family, char *address, int size)
{
    struct ifaddrs *ifap0, *ifap;
    char buf[NI_MAXHOST];
    char *interface = "eth0";
    struct sockaddr_in *addr4;
    struct sockaddr_in6 *addr6;
    int ret;
    
    if( NULL == address ) {
        return -1;
    }
    if(getifaddrs(&ifap0)) {
        return -1;
    }
    for( ifap = ifap0; ifap != NULL; ifap=ifap->ifa_next){
        if(strcmp(interface, ifap->ifa_name) != 0) continue;
        if(ifap->ifa_addr==NULL) continue;
        if ((ifap->ifa_flags & IFF_UP) == 0) continue;
        if(family != ifap->ifa_addr->sa_family) continue;

        if(AF_INET == ifap->ifa_addr->sa_family) {
            addr4 = (struct sockaddr_in *)ifap->ifa_addr;
            if ( NULL != inet_ntop(ifap->ifa_addr->sa_family, 
                    (void *)&(addr4->sin_addr), buf, NI_MAXHOST) ){
                if(size <= strlen(buf) ) break; 
                strcpy(address, buf);
                freeifaddrs(ifap0);
                return 0;
            }
            else break;
        }
        else if(AF_INET6 == ifap->ifa_addr->sa_family) {
            addr6 = (struct sockaddr_in6 *)ifap->ifa_addr;
            if(IN6_IS_ADDR_MULTICAST(&addr6->sin6_addr)){
                continue;
            }
            if(IN6_IS_ADDR_LINKLOCAL(&addr6->sin6_addr)){
                continue;
            }
            if(IN6_IS_ADDR_LOOPBACK(&addr6->sin6_addr)){
                continue;
            }
            if(IN6_IS_ADDR_UNSPECIFIED(&addr6->sin6_addr)){
                continue;
            }
            if(IN6_IS_ADDR_SITELOCAL(&addr6->sin6_addr)){
                continue;
            }
            if ( NULL != inet_ntop(ifap->ifa_addr->sa_family, 
                    (void *)&(addr6->sin6_addr), buf, NI_MAXHOST) ){
                if(size <= strlen(buf) ) break; 
                strcpy(address, buf);
                freeifaddrs(ifap0);
                return 0;
            }
            else break;
        }
    }

    freeifaddrs(ifap0);
    return -1;
}