From: John Crispin <blogic@openwrt.org>
Date: Tue, 2 Sep 2014 18:20:10 +0000 (+0200)
Subject: add SO_BINDTODEVICE support
X-Git-Url: http://git.openwrt.org/?p=project%2Fmdnsd.git;a=commitdiff_plain;h=c05c2fd3c8fd3a2bc5be41ee0fb35c5bae14a3cb

add SO_BINDTODEVICE support

Signed-off-by: John Crispin <blogic@openwrt.org>
---

diff --git a/interface.c b/interface.c
index 1584c24..6651fd8 100644
--- a/interface.c
+++ b/interface.c
@@ -378,6 +378,9 @@ reconnect_socket4(struct uloop_timeout *timeout)
 		goto retry;
 	}
 
+	if (setsockopt(iface->fd.fd, SOL_SOCKET, SO_BINDTODEVICE, iface->name, strlen(iface->name) < 0))
+		fprintf(stderr, "ioctl failed: SO_BINDTODEVICE\n");
+
 	if (setsockopt(iface->fd.fd, SOL_SOCKET, SO_REUSEADDR, &yes, sizeof(yes)) < 0)
 		fprintf(stderr, "ioctl failed: SO_REUSEADDR\n");
 
@@ -419,6 +422,9 @@ reconnect_socket6(struct uloop_timeout *timeout)
 		goto retry;
 	}
 
+	if (setsockopt(iface->fd.fd, SOL_SOCKET, SO_BINDTODEVICE, iface->name, strlen(iface->name) < 0))
+		fprintf(stderr, "ioctl failed: SO_BINDTODEVICE\n");
+
 	if (setsockopt(iface->fd.fd, IPPROTO_IPV6, IPV6_UNICAST_HOPS, &ttl, sizeof(ttl)) < 0)
 		fprintf(stderr, "ioctl failed: IPV6_UNICAST_HOPS\n");