1 files changed, 98 insertions, 0 deletions
diff --git a/3rdparty/openpgm-svn-r1135/pgm/indextoaddr.c b/3rdparty/openpgm-svn-r1135/pgm/indextoaddr.c
new file mode 100644
index 0000000..479dffd
--- /dev/null
+++ b/3rdparty/openpgm-svn-r1135/pgm/indextoaddr.c
@@ -0,0 +1,98 @@
+/* vim:ts=8:sts=8:sw=4:noai:noexpandtab
+ *
+ * portable interface index to socket address function.
+ *
+ * Copyright (c) 2006-2010 Miru Limited.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+#include <impl/i18n.h>
+#include <impl/framework.h>
+
+
+//#define INDEXTOADDR_DEBUG
+
+
+/* interfaces indexes refer to the link layer, we want to find the internet layer address.
+ * the big problem is that multiple IPv6 addresses can be bound to one link - called scopes.
+ * we can just pick the first scope and let IP routing handle the rest.
+ */
+
+bool
+pgm_if_indextoaddr (
+	const unsigned		  ifindex,
+	const sa_family_t	  iffamily,
+	const uint32_t		  ifscope,
+	struct sockaddr* restrict ifsa,
+	pgm_error_t**	 restrict error
+        )
+{
+	pgm_return_val_if_fail (NULL != ifsa, FALSE);
+
+	if (0 == ifindex)		/* any interface or address */
+	{
+		ifsa->sa_family = iffamily;
+		switch (iffamily) {
+		case AF_INET:
+			((struct sockaddr_in*)ifsa)->sin_addr.s_addr = INADDR_ANY;
+			break;
+
+		case AF_INET6:
+			((struct sockaddr_in6*)ifsa)->sin6_addr = in6addr_any;
+			break;
+
+		default:
+			pgm_return_val_if_reached (FALSE);
+			break;
+		}
+		return TRUE;
+	}
+
+	struct pgm_ifaddrs_t *ifap, *ifa;
+	if (!pgm_getifaddrs (&ifap, error)) {
+		pgm_prefix_error (error,
+			     _("Enumerating network interfaces: "));
+		return FALSE;
+	}
+
+	for (ifa = ifap; ifa; ifa = ifa->ifa_next)
+	{
+		if (NULL == ifa->ifa_addr ||
+		    ifa->ifa_addr->sa_family != iffamily)
+			continue;
+
+		const unsigned i = pgm_if_nametoindex (iffamily, ifa->ifa_name);
+		pgm_assert (0 != i);
+		if (i == ifindex)
+		{
+			if (ifscope && ifscope != pgm_sockaddr_scope_id (ifa->ifa_addr))
+				continue;
+			memcpy (ifsa, ifa->ifa_addr, pgm_sockaddr_len(ifa->ifa_addr));
+			pgm_freeifaddrs (ifap);
+			return TRUE;
+		}
+	}
+
+	pgm_set_error (error,
+		     PGM_ERROR_DOMAIN_IF,
+		     PGM_ERROR_NODEV,
+		     _("No matching network interface index: %i"),
+		     ifindex);
+	pgm_freeifaddrs (ifap);
+	return FALSE;
+}
+
+/* eof */