From 55457187d18221e76bd12f0fb2cfab65c49b92fb Mon Sep 17 00:00:00 2001
From: Marvin Borner
Date: Tue, 5 Mar 2019 01:09:01 +0100
Subject: Initial commit

---
 slstatus/components/ip.c | 60 ++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 60 insertions(+)
 create mode 100644 slstatus/components/ip.c

(limited to 'slstatus/components/ip.c')

diff --git a/slstatus/components/ip.c b/slstatus/components/ip.c
new file mode 100644
index 0000000..70724eb
--- /dev/null
+++ b/slstatus/components/ip.c
@@ -0,0 +1,60 @@
+/* See LICENSE file for copyright and license details. */
+#include <ifaddrs.h>
+#include <netdb.h>
+#include <stdio.h>
+#include <string.h>
+#if defined(__OpenBSD__)
+	#include <sys/types.h>
+	#include <sys/socket.h>
+#elif defined(__FreeBSD__)
+	#include <netinet/in.h>
+	#include <sys/socket.h>
+#endif
+
+#include "../util.h"
+
+static const char *
+ip(const char *interface, unsigned short sa_family)
+{
+	struct ifaddrs *ifaddr, *ifa;
+	int s;
+	char host[NI_MAXHOST];
+
+	if (getifaddrs(&ifaddr) < 0) {
+		warn("getifaddrs:");
+		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, interface) &&
+		    (ifa->ifa_addr->sa_family == sa_family)) {
+			freeifaddrs(ifaddr);
+			if (s != 0) {
+				warn("getnameinfo: %s", gai_strerror(s));
+				return NULL;
+			}
+			return bprintf("%s", host);
+		}
+	}
+
+	freeifaddrs(ifaddr);
+
+	return NULL;
+}
+
+const char *
+ipv4(const char *interface)
+{
+	return ip(interface, AF_INET);
+}
+
+const char *
+ipv6(const char *interface)
+{
+	return ip(interface, AF_INET6);
+}
-- 
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