f3590f3020
This is undefined behaviour, and some platforms don't like it. Issue #2355. Thanks to CJ Lee.
97 lines
2.4 KiB
C
97 lines
2.4 KiB
C
/*
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Copyright (c) 2009-2020 Roger Light <roger@atchoo.org>
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All rights reserved. This program and the accompanying materials
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are made available under the terms of the Eclipse Public License 2.0
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and Eclipse Distribution License v1.0 which accompany this distribution.
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The Eclipse Public License is available at
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https://www.eclipse.org/legal/epl-2.0/
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and the Eclipse Distribution License is available at
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http://www.eclipse.org/org/documents/edl-v10.php.
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SPDX-License-Identifier: EPL-2.0 OR BSD-3-Clause
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Contributors:
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Roger Light - initial implementation and documentation.
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*/
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#include "config.h"
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#include <assert.h>
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#include <stdio.h>
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#include <string.h>
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#ifdef WITH_BROKER
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# include "mosquitto_broker_internal.h"
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#endif
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#include "mosquitto.h"
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#include "logging_mosq.h"
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#include "memory_mosq.h"
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#include "messages_mosq.h"
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#include "mqtt_protocol.h"
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#include "net_mosq.h"
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#include "packet_mosq.h"
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#include "property_mosq.h"
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#include "read_handle.h"
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#include "send_mosq.h"
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#include "util_mosq.h"
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int handle__unsuback(struct mosquitto *mosq)
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{
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uint16_t mid;
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int rc;
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mosquitto_property *properties = NULL;
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assert(mosq);
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if(mosquitto__get_state(mosq) != mosq_cs_active){
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return MOSQ_ERR_PROTOCOL;
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}
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if(mosq->in_packet.command != CMD_UNSUBACK){
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return MOSQ_ERR_MALFORMED_PACKET;
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}
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#ifdef WITH_BROKER
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if(mosq->bridge == NULL){
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/* Client is not a bridge, so shouldn't be sending SUBACK */
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return MOSQ_ERR_PROTOCOL;
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}
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log__printf(NULL, MOSQ_LOG_DEBUG, "Received UNSUBACK from %s", SAFE_PRINT(mosq->id));
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#else
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log__printf(mosq, MOSQ_LOG_DEBUG, "Client %s received UNSUBACK", SAFE_PRINT(mosq->id));
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#endif
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rc = packet__read_uint16(&mosq->in_packet, &mid);
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if(rc) return rc;
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if(mid == 0) return MOSQ_ERR_PROTOCOL;
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if(mosq->protocol == mosq_p_mqtt5){
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rc = property__read_all(CMD_UNSUBACK, &mosq->in_packet, &properties);
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if(rc) return rc;
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}
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#ifdef WITH_BROKER
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/* Immediately free, we don't do anything with Reason String or User Property at the moment */
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mosquitto_property_free_all(&properties);
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#else
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pthread_mutex_lock(&mosq->callback_mutex);
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if(mosq->on_unsubscribe){
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mosq->in_callback = true;
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mosq->on_unsubscribe(mosq, mosq->userdata, mid);
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mosq->in_callback = false;
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}
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if(mosq->on_unsubscribe_v5){
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mosq->in_callback = true;
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mosq->on_unsubscribe_v5(mosq, mosq->userdata, mid, properties);
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mosq->in_callback = false;
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}
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pthread_mutex_unlock(&mosq->callback_mutex);
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mosquitto_property_free_all(&properties);
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#endif
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return MOSQ_ERR_SUCCESS;
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}
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