res_http_websocket: websocket write timeout fails to fully disconnect

When writing to a websocket if a timeout occurred the underlying socket did not
get closed/disconnected. This patch makes sure the websocket gets disconnected
on a write timeout. Also a notice is logged stating that the websocket was
disconnected.

ASTERISK-24701 #close
Reported by: Matt Jordan
Review: https://reviewboard.asterisk.org/r/4412/
........

Merged revisions 431669 from http://svn.asterisk.org/svn/asterisk/branches/11
........

Merged revisions 431670 from http://svn.asterisk.org/svn/asterisk/branches/13


git-svn-id: https://origsvn.digium.com/svn/asterisk/certified/branches/13.1@431697 65c4cc65-6c06-0410-ace0-fbb531ad65f3

res/ari/ari_websockets.c

@@ -100,6 +100,10 @@ struct ast_json *ast_ari_websocket_session_read(
 {
 	RAII_VAR(struct ast_json *, message, NULL, ast_json_unref);
 
+	if (ast_websocket_fd(session->ws_session) < 0) {
+		return NULL;
+	}
+
 	while (!message) {
 		int res;
 		char *payload;
@@ -127,7 +131,7 @@ struct ast_json *ast_ari_websocket_session_read(
 
 		switch (opcode) {
 		case AST_WEBSOCKET_OPCODE_CLOSE:
-			ast_debug(1, "WebSocket closed by peer\n");
+			ast_debug(1, "WebSocket closed\n");
 			return NULL;
 		case AST_WEBSOCKET_OPCODE_TEXT:
 			message = ast_json_load_buf(payload, payload_len, NULL);
@@ -173,8 +177,12 @@ int ast_ari_websocket_session_write(struct ast_ari_websocket_session *session,
 	}
 
 	ast_debug(3, "Examining ARI event: \n%s\n", str);
-	return ast_websocket_write(session->ws_session,
-		AST_WEBSOCKET_OPCODE_TEXT, str,	strlen(str));
+	if (ast_websocket_write(session->ws_session,
+				AST_WEBSOCKET_OPCODE_TEXT, str,	strlen(str))) {
+		ast_log(LOG_NOTICE, "Problem occurred during websocket write, websocket closed\n");
+		return -1;
+	}
+	return 0;
 }
 
 void ari_handle_websocket(struct ast_websocket_server *ws_server,

res/res_http_websocket.c

@@ -307,11 +307,15 @@ int AST_OPTIONAL_API_NAME(ast_websocket_write)(struct ast_websocket *session, en
 	}
 	if (ast_careful_fwrite(session->f, session->fd, frame, header_size, session->timeout)) {
 		ao2_unlock(session);
+		/* 1011 - server terminating connection due to not being able to fulfill the request */
+		ast_websocket_close(session, 1011);
 		return -1;
 	}
 
 	if (ast_careful_fwrite(session->f, session->fd, payload, actual_length, session->timeout)) {
 		ao2_unlock(session);
+		/* 1011 - server terminating connection due to not being able to fulfill the request */
+		ast_websocket_close(session, 1011);
 		return -1;
 	}
 	fflush(session->f);