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/*
* ip1.c
*
* Created on: 09.07.2011
* Author: holger
*/
#include <sys/types.h>
#include <sys/socket.h>
#include <arpa/inet.h>
#include <net/if.h>
#include <errno.h>
#include <ifaddrs.h>
#include <netinet/in.h>
#include <stdio.h>
#include <stdlib.h>
void show_address_info( struct ifaddrs *ifa ){
struct sockaddr_in *s4;
struct sockaddr_in6 *s6;
/* ipv6 addresses have to fit in this buffer */
char buf[64];
if (AF_INET == ifa->ifa_addr->sa_family){
s4 = (struct sockaddr_in *)(ifa->ifa_addr);
if (NULL == inet_ntop(ifa->ifa_addr->sa_family, (void *)&(s4->sin_addr), buf, sizeof(buf))){
printf("%s: inet_ntop failed!\n", ifa->ifa_name);
} else {
printf("IPv4 addr %s: %s\n", ifa->ifa_name, buf);
}
}
else if (AF_INET6 == ifa->ifa_addr->sa_family) {
s6 = (struct sockaddr_in6 *)(ifa->ifa_addr);
if (NULL == inet_ntop(ifa->ifa_addr->sa_family, (void *)&(s6->sin6_addr), buf, sizeof(buf))) {
printf("%s: inet_ntop failed!\n", ifa->ifa_name);
} else {
printf("IPv6 addr %s: %s\n", ifa->ifa_name, buf);
}
}
}
int main(int argc, char **argv){
struct ifaddrs *myaddrs, *ifa;
int status;
status = getifaddrs(&myaddrs);
if (status != 0){
perror("getifaddrs failed!");
exit(1);
}
for (ifa = myaddrs; ifa != NULL; ifa = ifa->ifa_next){
if (NULL == ifa->ifa_addr){
continue;
}
if ((ifa->ifa_flags & IFF_UP) == 0) {
continue;
}
show_address_info(ifa);
}
freeifaddrs(myaddrs);
return 0;
}
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