fixup! gnrc_sock_udp: accept response from any address if remote is m…

…ulticast

sys/net/gnrc/sock/udp/gnrc_sock_udp.c

@@ -206,23 +206,23 @@ ssize_t sock_udp_recv_aux(sock_udp_t *sock, void *data, size_t max_len,
     return (nobufs) ? -ENOBUFS : ((res < 0) ? res : ret);
 }
 
-static bool _remote_mismatch(const sock_udp_t *sock, const udp_hdr_t *hdr,
+static bool _remote_match(const sock_udp_t *sock, const udp_hdr_t *hdr,
                              const sock_ip_ep_t *remote)
 {
     if ((sock->flags & SOCK_FLAGS_CONNECT_REMOTE) == 0) {
         /* socket is not bound to a remote */
-        return false;
+        return true;
     }
 
     if (sock->remote.family == AF_UNSPEC) {
         /* socket accepts any remote */
-        return false;
+        return true;
     }
 
     if (sock->remote.port != byteorder_ntohs(hdr->src_port)) {
         DEBUG("gnrc_sock_udp: port mismatch (%u != %u)\n",
               sock->remote.port, byteorder_ntohs(hdr->src_port));
-        return true;
+        return false;
     }
 
     if (memcmp(&sock->remote.addr, &remote->addr, sizeof(ipv6_addr_t)) != 0) {
@@ -231,10 +231,10 @@ static bool _remote_mismatch(const sock_udp_t *sock, const udp_hdr_t *hdr,
               ipv6_addr_to_str(addr_str, (ipv6_addr_t *)&sock->remote.addr, sizeof(addr_str)));
         DEBUG(", source (%s) does not match\n",
               ipv6_addr_to_str(addr_str, (ipv6_addr_t *)&remote->addr, sizeof(addr_str)));
-        return true;
+        return false;
     }
 
-    return false;
+    return true;
 }
 
 ssize_t sock_udp_recv_buf_aux(sock_udp_t *sock, void **data, void **buf_ctx,
@@ -286,7 +286,7 @@ ssize_t sock_udp_recv_buf_aux(sock_udp_t *sock, void **data, void **buf_ctx,
         memcpy(remote, &tmp, sizeof(tmp));
         remote->port = byteorder_ntohs(hdr->src_port);
     }
-    if (_remote_mismatch(sock, hdr, &tmp)) {
+    if (!_remote_match(sock, hdr, &tmp)) {
         gnrc_pktbuf_release(pkt);
         return -EPROTO;
     }