llmnrd: don't exit on SO_BINDTODEVICE failure

The -i option requires running llmnrd as root for SO_BINDTODEVICE to
work. Packets are still filtered based on interface because only rtnl
messages for addresses of the specified interface are considered in
iface_nlmsg_change_addr. Instead log a warning only if SO_BINDTODEVICE
fails.

Signed-off-by: Jon Franklin <jvfranklin@gmail.com>
[tk: small adjustments to commit message, check return value of iface_init]
Signed-off-by: Tobias Klauser <tklauser@distanz.ch>

1 files changed, 1 insertions, 1 deletions

diff --git a/iface.h b/iface.h
index a8eb92c..00a39ce 100644
--- a/iface.h
+++ b/iface.h
@@ -30,7 +30,7 @@ enum iface_event_type {
 typedef void (*iface_event_handler_t)(enum iface_event_type, unsigned char af,
 				      unsigned int ifindex);
 
-void iface_init(int sock, const char *iface, bool ipv6,
+int iface_init(int sock, const char *iface, bool ipv6,
 		iface_event_handler_t event_handler);
 int iface_recv(int sock);