Copy scope id when binding to IPv6 Link-Local address

Binding to an IPv6 Link-Local address requires the scope ID to be set. If this is not set bind will return EINVAL. Signed-off-by: Thymo van Beers <[email protected]>
eclipse-mosquitto · Nov 1, 2024 · c968f5b · c968f5b
1 parent 9d325b2
commit c968f5b
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/src/net.c b/src/net.c
@@ -672,6 +672,9 @@ static int net__bind_interface(struct mosquitto__listener *listener, struct addr
 						memcpy(&((struct sockaddr_in6 *)rp->ai_addr)->sin6_addr,
 								&((struct sockaddr_in6 *)ifa->ifa_addr)->sin6_addr,
 								sizeof(struct in6_addr));
+
+						((struct sockaddr_in6 *)rp->ai_addr)->sin6_scope_id = ((struct sockaddr_in6 *)ifa->ifa_addr)->sin6_scope_id;
+
 						freeifaddrs(ifaddr);
 						return MOSQ_ERR_SUCCESS;
 					}