Bind mcast socket to its group rather than the wildcard

1 files changed, 1 insertions, 7 deletions

diff --git a/src/ot_socket.c b/src/ot_socket.c
index 79bb01a..b6a1803 100644
--- a/src/ot_socket.c
+++ b/src/ot_socket.c
@@ -263,15 +263,9 @@ static int socket_v4_bind(const ot_ip6 ip, uint16_t port) {
 
 int socket_mcast_join(const ot_ip6 group, const ot_ip6 interface, uint16_t port) {
   struct ip_mreq mreq;
-  ot_ip6         any;
   int            s;
 
-  /* The group is what is listened to, so the socket takes the wildcard and
-     the join names the interface to receive it on */
-  memcpy(any, ip_v4mapped_prefix, sizeof(ip_v4mapped_prefix));
-  memset(any + sizeof(ip_v4mapped_prefix), 0, 4);
-
-  if ((s = socket_v4_bind(any, port)) == -1)
+  if ((s = socket_v4_bind(group, port)) == -1)
     return -1;
 
   memset(&mreq, 0, sizeof(mreq));