diff options
Diffstat (limited to 'src')
-rw-r--r-- | src/host.c | 36 |
1 files changed, 21 insertions, 15 deletions
@@ -10,6 +10,26 @@ #include <sys/socket.h> #include <netdb.h> +static inline int addr_to_ip(const struct addrinfo *address, char *ip, int length) { + void *ptr; + switch (address->ai_family) { + case AF_INET: + ptr = &((struct sockaddr_in *) address->ai_addr)->sin_addr; + break; + case AF_INET6: + ptr = &((struct sockaddr_in6 *) address->ai_addr)->sin6_addr; + break; + default: + fprintf(stderr, "Unknown address family: %u\n", address->ai_family); + return 0; + } + if (inet_ntop(address->ai_family, ptr, ip, length) == NULL) { + perror("inet_ntop"); + return 0; + } + return 1; +} + int main(int argc, char **argv) { struct addrinfo hints = { 0, AF_UNSPEC, SOCK_DGRAM, 0, 0, NULL, NULL, NULL }; struct addrinfo *result, *address; @@ -26,21 +46,8 @@ int main(int argc, char **argv) { } for (address = result; address != NULL; address = address->ai_next) { - switch (address->ai_family) { - case AF_INET: - ptr = &((struct sockaddr_in *) address->ai_addr)->sin_addr; - break; - case AF_INET6: - ptr = &((struct sockaddr_in6 *) address->ai_addr)->sin6_addr; - break; - default: - fprintf(stderr, "Unknown address family: %u\n", address->ai_family); - goto loop; - } - if (inet_ntop(address->ai_family, ptr, ip_address, sizeof(ip_address)) == NULL) { - perror("inet_ntop"); + if (addr_to_ip(address, ip_address, sizeof(ip_address)) == 0) continue; - } puts(ip_address); ret = getnameinfo(address->ai_addr, address->ai_addrlen, hostname, NI_MAXHOST, NULL, 0, 0); if (ret != 0) { @@ -48,7 +55,6 @@ int main(int argc, char **argv) { continue; } puts(hostname); -loop:; } freeaddrinfo(address); return(EXIT_SUCCESS); |