2017-09-17 18:45:03 +03:00
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/* See LICENSE file for copyright and license details. */
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2017-09-17 17:18:17 +03:00
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#include <ifaddrs.h>
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#include <netdb.h>
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#include <stdio.h>
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#include <string.h>
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2018-05-02 09:21:32 +03:00
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#if defined(__OpenBSD__)
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2018-05-07 12:21:59 +03:00
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#include <sys/types.h>
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#include <sys/socket.h>
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2018-05-02 09:21:32 +03:00
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#endif
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2017-09-17 17:18:17 +03:00
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2017-09-24 16:33:01 +03:00
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#include "../util.h"
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2017-09-17 17:18:17 +03:00
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2018-05-19 14:34:18 +03:00
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static const char *
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ip(const char *iface, unsigned short sa_family)
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2017-09-17 17:18:17 +03:00
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{
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struct ifaddrs *ifaddr, *ifa;
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int s;
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char host[NI_MAXHOST];
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2018-05-06 23:28:56 +03:00
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if (getifaddrs(&ifaddr) < 0) {
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2018-05-18 11:59:05 +03:00
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warn("getifaddrs:");
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2017-09-17 17:18:17 +03:00
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return NULL;
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}
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for (ifa = ifaddr; ifa != NULL; ifa = ifa->ifa_next) {
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2018-05-06 23:28:56 +03:00
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if (!ifa->ifa_addr) {
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2017-09-17 17:18:17 +03:00
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continue;
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}
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2018-05-19 14:34:18 +03:00
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s = getnameinfo(ifa->ifa_addr, sizeof(struct sockaddr_in6),
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host, NI_MAXHOST, NULL, 0, NI_NUMERICHOST);
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2018-05-06 23:28:56 +03:00
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if (!strcmp(ifa->ifa_name, iface) &&
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2018-05-19 14:34:18 +03:00
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(ifa->ifa_addr->sa_family == sa_family)) {
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2018-05-20 16:53:48 +03:00
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freeifaddrs(ifaddr);
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2017-09-17 17:18:17 +03:00
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if (s != 0) {
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2018-05-18 11:59:05 +03:00
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warn("getnameinfo: %s", gai_strerror(s));
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2017-09-17 17:18:17 +03:00
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return NULL;
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}
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return bprintf("%s", host);
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}
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}
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freeifaddrs(ifaddr);
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return NULL;
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}
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const char *
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2018-05-19 14:34:18 +03:00
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ipv4(const char *iface)
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2017-09-17 17:18:17 +03:00
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{
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2018-05-19 14:34:18 +03:00
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return ip(iface, AF_INET);
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}
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2017-09-17 17:18:17 +03:00
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2018-05-19 14:34:18 +03:00
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const char *
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ipv6(const char *iface)
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{
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return ip(iface, AF_INET6);
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2017-09-17 17:18:17 +03:00
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}
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