handle_pubackcomp.c

/*
Copyright (c) 2009-2019 Roger Light <roger@atchoo.org>

All rights reserved. This program and the accompanying materials
are made available under the terms of the Eclipse Public License v1.0
and Eclipse Distribution License v1.0 which accompany this distribution.

The Eclipse Public License is available at
   http:https://www.eclipse.org/legal/epl-v10.html
and the Eclipse Distribution License is available at
  http:https://www.eclipse.org/org/documents/edl-v10.php.

Contributors:
   Roger Light - initial implementation and documentation.
*/

#include "config.h"

#include <assert.h>
#include <stdio.h>
#include <string.h>

#ifdef WITH_BROKER
#  include "mosquitto_broker_internal.h"
#endif

#include "mosquitto.h"
#include "logging_mosq.h"
#include "memory_mosq.h"
#include "messages_mosq.h"
#include "mqtt_protocol.h"
#include "net_mosq.h"
#include "packet_mosq.h"
#include "read_handle.h"
#include "send_mosq.h"
#include "util_mosq.h"


#ifdef WITH_BROKER
int handle__pubackcomp(struct mosquitto_db *db, struct mosquitto *mosq, const char *type)
#else
int handle__pubackcomp(struct mosquitto *mosq, const char *type)
#endif
{
	uint8_t reason_code = 0;
	uint16_t mid;
	int rc;
	mosquitto_property *properties = NULL;
	int qos;

	assert(mosq);

	if(mosq->state != mosq_cs_connected){
		return MOSQ_ERR_PROTOCOL;
	}

	pthread_mutex_lock(&mosq->msgs_out.mutex);
	util__increment_send_quota(mosq);
	pthread_mutex_unlock(&mosq->msgs_out.mutex);

	rc = packet__read_uint16(&mosq->in_packet, &mid);
	if(rc) return rc;
	qos = type[3] == 'A'?1:2; /* pubAck or pubComp */
	if(mid == 0) return MOSQ_ERR_PROTOCOL;

	if(mosq->protocol == mosq_p_mqtt5 && mosq->in_packet.remaining_length > 2){
		rc = packet__read_byte(&mosq->in_packet, &reason_code);
		if(rc) return rc;

		if(mosq->in_packet.remaining_length > 3){
			rc = property__read_all(CMD_PUBACK, &mosq->in_packet, &properties);
			if(rc) return rc;
		}
	}

#ifdef WITH_BROKER
	log__printf(NULL, MOSQ_LOG_DEBUG, "Received %s from %s (Mid: %d, RC:%d)", type, mosq->id, mid, reason_code);

	/* Immediately free, we don't do anything with Reason String or User Property at the moment */
	mosquitto_property_free_all(&properties);

	rc = db__message_delete_outgoing(db, mosq, mid, mosq_ms_wait_for_pubcomp, qos);
	if(rc == MOSQ_ERR_NOT_FOUND){
		log__printf(mosq, MOSQ_LOG_WARNING, "Warning: Received %s from %s for an unknown packet identifier %d.", type, mosq->id, mid);
		return MOSQ_ERR_SUCCESS;
	}else{
		return rc;
	}
#else
	log__printf(mosq, MOSQ_LOG_DEBUG, "Client %s received %s (Mid: %d, RC:%d)", mosq->id, type, mid, reason_code);

	rc = message__delete(mosq, mid, mosq_md_out, qos);
	if(rc){
		return rc;
	}else{
		/* Only inform the client the message has been sent once. */
		pthread_mutex_lock(&mosq->callback_mutex);
		if(mosq->on_publish){
			mosq->in_callback = true;
			mosq->on_publish(mosq, mosq->userdata, mid);
			mosq->in_callback = false;
		}
		if(mosq->on_publish_v5){
			mosq->in_callback = true;
			mosq->on_publish_v5(mosq, mosq->userdata, mid, reason_code, properties);
			mosq->in_callback = false;
		}
		pthread_mutex_unlock(&mosq->callback_mutex);
		mosquitto_property_free_all(&properties);
	}
	pthread_mutex_lock(&mosq->msgs_out.mutex);
	message__release_to_inflight(mosq, mosq_md_out);
	pthread_mutex_unlock(&mosq->msgs_out.mutex);

	return MOSQ_ERR_SUCCESS;
#endif
}