Fix websockets connections blocking non-ws connections on Windows.

Closes #1934. Thanks to sectokia and jarapa9.

ChangeLog.txt

@@ -6,6 +6,8 @@ Broker:
 - Fix dynamic security configuration possibly not being reloaded on Windows
   only. Closes #1962.
 - Add more log messages for dynsec load/save error conditions.
+- Fix websockets connections blocking non-websockets connections on Windows.
+  Closes #1934.
 
 Build:
 - Fix man pages not being built when using CMake. Closes #1969.

src/mux_poll.c

@@ -84,7 +84,7 @@ int mux_poll__init(struct mosquitto__listener_sock *listensock, int listensock_c
 	pollfd_max = (size_t)sysconf(_SC_OPEN_MAX);
 #endif
 
-	pollfds = mosquitto__malloc(sizeof(struct pollfd)*pollfd_max);
+	pollfds = mosquitto__calloc(pollfd_max, sizeof(struct pollfd));
 	if(!pollfds){
 		log__printf(NULL, MOSQ_LOG_ERR, "Error: Out of memory.");
 		return MOSQ_ERR_NOMEM;
@@ -145,7 +145,7 @@ int mux_poll__add_in(struct mosquitto *context)
 
 	if(context->pollfd_index != -1){
 		pollfds[context->pollfd_index].fd = context->sock;
-		pollfds[context->pollfd_index].events = POLLIN | POLLPRI;
+		pollfds[context->pollfd_index].events = POLLIN;
 		pollfds[context->pollfd_index].revents = 0;
 	}else{
 		for(i=0; i<pollfd_max; i++){
@@ -230,7 +230,7 @@ int mux_poll__handle(struct mosquitto__listener_sock *listensock, int listensock
 		loop_handle_reads_writes(pollfds);
 
 		for(i=0; i<listensock_count; i++){
-			if(pollfds[i].revents & (POLLIN | POLLPRI)){
+			if(pollfds[i].revents & POLLIN){
 #ifdef WITH_WEBSOCKETS
 				if(listensock[i].listener->ws_context){
 					/* Nothing needs to happen here, because we always call lws_service in the loop.

src/websockets.c

@@ -188,9 +188,6 @@ static int callback_mqtt(
 				if(mosq->sock != INVALID_SOCKET){
 					HASH_DELETE(hh_sock, db.contexts_by_sock, mosq);
 					mosq->sock = INVALID_SOCKET;
-#ifndef WITH_EPOLL
-					mosq->pollfd_index = -1;
-#endif
 					mux__delete(mosq);
 				}
 				mosq->wsi = NULL;