mirror of
https://github.com/eclipse-mosquitto/mosquitto.git
synced 2026-02-22 21:43:07 +01:00
116 lines
3 KiB
C
116 lines
3 KiB
C
/*
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Copyright (c) 2009-2021 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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#ifdef WITH_BROKER
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# include "mosquitto_broker_internal.h"
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#endif
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#include "callbacks.h"
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#include "mosquitto.h"
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#include "mosquitto_internal.h"
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#include "logging_mosq.h"
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#include "mosquitto/mqtt_protocol.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 "util_mosq.h"
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int handle__suback(struct mosquitto *mosq)
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{
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uint16_t mid;
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uint8_t qos;
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int *granted_qos;
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int qos_count;
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int i = 0;
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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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#ifdef WITH_BROKER
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log__printf(NULL, MOSQ_LOG_INFO, "Protocol error from %s: SUBACK before session is active.", mosq->id);
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#endif
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return MOSQ_ERR_PROTOCOL;
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}
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if(mosq->in_packet.command != CMD_SUBACK){
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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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log__printf(NULL, MOSQ_LOG_INFO, "Protocol error from %s: SUBACK when not a bridge.", mosq->id);
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return MOSQ_ERR_PROTOCOL;
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}
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log__printf(NULL, MOSQ_LOG_DEBUG, "Received SUBACK from %s", SAFE_PRINT(mosq->id));
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#else
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log__printf(mosq, MOSQ_LOG_DEBUG, "Client %s received SUBACK", 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){
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return rc;
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}
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if(mid == 0){
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return MOSQ_ERR_PROTOCOL;
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}
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if(mosq->protocol == mosq_p_mqtt5){
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rc = property__read_all(CMD_SUBACK, &mosq->in_packet, &properties);
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if(rc){
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return rc;
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}
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}
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qos_count = (int)(mosq->in_packet.remaining_length - mosq->in_packet.pos);
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if(qos_count == 0){
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mosquitto_property_free_all(&properties);
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return MOSQ_ERR_PROTOCOL;
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}
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granted_qos = mosquitto_malloc((size_t)qos_count*sizeof(int));
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if(!granted_qos){
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mosquitto_property_free_all(&properties);
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return MOSQ_ERR_NOMEM;
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}
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while(mosq->in_packet.pos < mosq->in_packet.remaining_length){
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rc = packet__read_byte(&mosq->in_packet, &qos);
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if(rc){
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mosquitto_FREE(granted_qos);
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mosquitto_property_free_all(&properties);
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return rc;
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}
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granted_qos[i] = (int)qos;
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i++;
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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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callback__on_subscribe(mosq, mid, qos_count, granted_qos, properties);
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mosquitto_property_free_all(&properties);
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#endif
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mosquitto_FREE(granted_qos);
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return MOSQ_ERR_SUCCESS;
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}
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