8210c1fa7a
At the moment this only writes a 0 property length, i.e. no properties. It does mean that output packets are more correct than before.
93 lines
2.4 KiB
C
93 lines
2.4 KiB
C
/*
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Copyright (c) 2009-2018 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 v1.0
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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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http://www.eclipse.org/legal/epl-v10.html
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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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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 <stdio.h>
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#include <string.h>
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#include "mosquitto_broker_internal.h"
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#include "memory_mosq.h"
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#include "mqtt_protocol.h"
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#include "packet_mosq.h"
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#include "send_mosq.h"
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/*
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#include "sys_tree.h"
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#include "time_mosq.h"
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#include "tls_mosq.h"
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#include "util_mosq.h"
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*/
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int handle__unsubscribe(struct mosquitto_db *db, struct mosquitto *context)
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{
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uint16_t mid;
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char *sub;
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int slen;
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if(!context) return MOSQ_ERR_INVAL;
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log__printf(NULL, MOSQ_LOG_DEBUG, "Received UNSUBSCRIBE from %s", context->id);
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if(context->protocol != mosq_p_mqtt31){
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if((context->in_packet.command&0x0F) != 0x02){
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return MOSQ_ERR_PROTOCOL;
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}
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}
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if(packet__read_uint16(&context->in_packet, &mid)) return 1;
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if(context->protocol == mosq_p_mqtt311 || context->protocol == mosq_p_mqtt5){
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if(context->in_packet.pos == context->in_packet.remaining_length){
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/* No topic specified, protocol error. */
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return MOSQ_ERR_PROTOCOL;
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}
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}
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while(context->in_packet.pos < context->in_packet.remaining_length){
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sub = NULL;
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if(packet__read_string(&context->in_packet, &sub, &slen)){
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return 1;
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}
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if(sub){
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if(!slen){
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log__printf(NULL, MOSQ_LOG_INFO,
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"Empty unsubscription string from %s, disconnecting.",
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context->id);
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mosquitto__free(sub);
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return 1;
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}
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if(mosquitto_sub_topic_check(sub)){
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log__printf(NULL, MOSQ_LOG_INFO,
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"Invalid unsubscription string from %s, disconnecting.",
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context->id);
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mosquitto__free(sub);
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return 1;
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}
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log__printf(NULL, MOSQ_LOG_DEBUG, "\t%s", sub);
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sub__remove(db, context, sub, db->subs);
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log__printf(NULL, MOSQ_LOG_UNSUBSCRIBE, "%s %s", context->id, sub);
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mosquitto__free(sub);
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}
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}
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#ifdef WITH_PERSISTENCE
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db->persistence_changes++;
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#endif
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log__printf(NULL, MOSQ_LOG_DEBUG, "Sending UNSUBACK to %s", context->id);
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return send__command_with_mid(context, UNSUBACK, mid, false, NULL);
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}
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