From 7246dc4381c6c95454672a5c1aff65a02d6d3747 Mon Sep 17 00:00:00 2001
From: Laslo Hunhold <dev@frign.de>
Date: Sun, 24 Sep 2017 15:33:01 +0200
Subject: Move components into dedicated subdirectory

This brings us a lot more tidiness.
---
 components/ip.c | 70 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 70 insertions(+)
 create mode 100644 components/ip.c

(limited to 'components/ip.c')

diff --git a/components/ip.c b/components/ip.c
new file mode 100644
index 0000000..f98b2ed
--- /dev/null
+++ b/components/ip.c
@@ -0,0 +1,70 @@
+/* See LICENSE file for copyright and license details. */
+#include <err.h>
+#include <ifaddrs.h>
+#include <netdb.h>
+#include <stdio.h>
+#include <string.h>
+
+#include "../util.h"
+
+const char *
+ipv4(const char *iface)
+{
+	struct ifaddrs *ifaddr, *ifa;
+	int s;
+	char host[NI_MAXHOST];
+
+	if (getifaddrs(&ifaddr) == -1) {
+		warn("Failed to get IPv4 address for interface %s", iface);
+		return NULL;
+	}
+
+	for (ifa = ifaddr; ifa != NULL; ifa = ifa->ifa_next) {
+		if (ifa->ifa_addr == NULL) {
+			continue;
+		}
+		s = getnameinfo(ifa->ifa_addr, sizeof(struct sockaddr_in), host, NI_MAXHOST, NULL, 0, NI_NUMERICHOST);
+		if ((strcmp(ifa->ifa_name, iface) == 0) && (ifa->ifa_addr->sa_family == AF_INET)) {
+			if (s != 0) {
+				warnx("Failed to get IPv4 address for interface %s", iface);
+				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) == -1) {
+		warn("Failed to get IPv6 address for interface %s", iface);
+		return NULL;
+	}
+
+	for (ifa = ifaddr; ifa != NULL; ifa = ifa->ifa_next) {
+		if (ifa->ifa_addr == NULL) {
+			continue;
+		}
+		s = getnameinfo(ifa->ifa_addr, sizeof(struct sockaddr_in6), host, NI_MAXHOST, NULL, 0, NI_NUMERICHOST);
+		if ((strcmp(ifa->ifa_name, iface) == 0) && (ifa->ifa_addr->sa_family == AF_INET6)) {
+			if (s != 0) {
+				warnx("Failed to get IPv6 address for interface %s", iface);
+				return NULL;
+			}
+			return bprintf("%s", host);
+		}
+	}
+
+	freeifaddrs(ifaddr);
+
+	return NULL;
+}
-- 
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