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handle_suback.c
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handle_suback.c
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/*
Copyright (c) 2009-2020 Roger Light <[email protected]>
All rights reserved. This program and the accompanying materials
are made available under the terms of the Eclipse Public License 2.0
and Eclipse Distribution License v1.0 which accompany this distribution.
The Eclipse Public License is available at
https://www.eclipse.org/legal/epl-2.0/
and the Eclipse Distribution License is available at
http:https://www.eclipse.org/org/documents/edl-v10.php.
SPDX-License-Identifier: EPL-2.0 OR BSD-3-Clause
Contributors:
Roger Light - initial implementation and documentation.
*/
#include "config.h"
#include <assert.h>
#ifdef WITH_BROKER
# include "mosquitto_broker_internal.h"
#endif
#include "mosquitto.h"
#include "mosquitto_internal.h"
#include "logging_mosq.h"
#include "memory_mosq.h"
#include "mqtt_protocol.h"
#include "packet_mosq.h"
#include "property_mosq.h"
#include "read_handle.h"
#include "util_mosq.h"
int handle__suback(struct mosquitto *mosq)
{
uint16_t mid;
uint8_t qos;
int *granted_qos;
int qos_count;
int i = 0;
int rc;
mosquitto_property *properties = NULL;
assert(mosq);
if(mosquitto__get_state(mosq) != mosq_cs_active){
return MOSQ_ERR_PROTOCOL;
}
if(mosq->in_packet.command != CMD_SUBACK){
return MOSQ_ERR_MALFORMED_PACKET;
}
#ifdef WITH_BROKER
if(mosq->bridge == NULL){
/* Client is not a bridge, so shouldn't be sending SUBACK */
return MOSQ_ERR_PROTOCOL;
}
log__printf(NULL, MOSQ_LOG_DEBUG, "Received SUBACK from %s", SAFE_PRINT(mosq->id));
#else
log__printf(mosq, MOSQ_LOG_DEBUG, "Client %s received SUBACK", SAFE_PRINT(mosq->id));
#endif
rc = packet__read_uint16(&mosq->in_packet, &mid);
if(rc) return rc;
if(mid == 0) return MOSQ_ERR_PROTOCOL;
if(mosq->protocol == mosq_p_mqtt5){
rc = property__read_all(CMD_SUBACK, &mosq->in_packet, &properties);
if(rc) return rc;
}
qos_count = (int)(mosq->in_packet.remaining_length - mosq->in_packet.pos);
granted_qos = mosquitto__malloc((size_t)qos_count*sizeof(int));
if(!granted_qos){
#ifdef WITH_BROKER
mosquitto_property_free_all(&properties);
#endif
return MOSQ_ERR_NOMEM;
}
while(mosq->in_packet.pos < mosq->in_packet.remaining_length){
rc = packet__read_byte(&mosq->in_packet, &qos);
if(rc){
mosquitto__free(granted_qos);
#ifdef WITH_BROKER
mosquitto_property_free_all(&properties);
#endif
return rc;
}
granted_qos[i] = (int)qos;
i++;
}
#ifdef WITH_BROKER
/* Immediately free, we don't do anything with Reason String or User Property at the moment */
mosquitto_property_free_all(&properties);
#else
pthread_mutex_lock(&mosq->callback_mutex);
if(mosq->on_subscribe){
mosq->in_callback = true;
mosq->on_subscribe(mosq, mosq->userdata, mid, qos_count, granted_qos);
mosq->in_callback = false;
}
if(mosq->on_subscribe_v5){
mosq->in_callback = true;
mosq->on_subscribe_v5(mosq, mosq->userdata, mid, qos_count, granted_qos, properties);
mosq->in_callback = false;
}
pthread_mutex_unlock(&mosq->callback_mutex);
mosquitto_property_free_all(&properties);
#endif
mosquitto__free(granted_qos);
return MOSQ_ERR_SUCCESS;
}