- /* See LICENSE file for copyright and license details. */
- #include <errno.h>
- #include <ifaddrs.h>
- #include <netdb.h>
- #include <stdio.h>
- #include <string.h>
- #if defined(__OpenBSD__)
- #include <sys/types.h>
- #include <sys/socket.h>
- #endif
-
- #include "../util.h"
-
- const char *
- ipv4(const char *iface)
- {
- struct ifaddrs *ifaddr, *ifa;
- int s;
- char host[NI_MAXHOST];
-
- if (getifaddrs(&ifaddr) < 0) {
- fprintf(stderr, "getifaddrs: %s\n", strerror(errno));
- return NULL;
- }
-
- for (ifa = ifaddr; ifa != NULL; ifa = ifa->ifa_next) {
- if (!ifa->ifa_addr) {
- continue;
- }
- s = getnameinfo(ifa->ifa_addr, sizeof(struct sockaddr_in), host,
- NI_MAXHOST, NULL, 0, NI_NUMERICHOST);
- if (!strcmp(ifa->ifa_name, iface) &&
- (ifa->ifa_addr->sa_family == AF_INET)) {
- if (s != 0) {
- fprintf(stderr, "getnameinfo: %s\n", gai_strerror(s));
- return NULL;
- }
- return bprintf("%s", host);
- }
- }
-
- freeifaddrs(ifaddr);
-
- return NULL;
- }
-
- const char *
- ipv6(const char *iface)
- {
- struct ifaddrs *ifaddr, *ifa;
- int s;
- char host[NI_MAXHOST];
-
- if (getifaddrs(&ifaddr) < 0) {
- fprintf(stderr, "getifaddrs: %s\n", strerror(errno));
- return NULL;
- }
-
- for (ifa = ifaddr; ifa != NULL; ifa = ifa->ifa_next) {
- if (!ifa->ifa_addr) {
- continue;
- }
- s = getnameinfo(ifa->ifa_addr, sizeof(struct sockaddr_in6), host,
- NI_MAXHOST, NULL, 0, NI_NUMERICHOST);
- if (!strcmp(ifa->ifa_name, iface) &&
- (ifa->ifa_addr->sa_family == AF_INET6)) {
- if (s != 0) {
- fprintf(stderr, "getnameinfo: %s\n", gai_strerror(s));
- return NULL;
- }
- return bprintf("%s", host);
- }
- }
-
- freeifaddrs(ifaddr);
-
- return NULL;
- }
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