/*
|
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://www.eclipse.org/legal/epl-v10.html
|
and the Eclipse Distribution License is available at
|
http://www.eclipse.org/org/documents/edl-v10.php.
|
|
Contributors:
|
Roger Light - initial implementation and documentation.
|
*/
|
|
#include "config.h"
|
|
#include <assert.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 "mqtt_protocol.h"
|
#include "packet_mosq.h"
|
#include "property_mosq.h"
|
#include "send_mosq.h"
|
#include "util_mosq.h"
|
|
|
int send__unsubscribe(struct mosquitto *mosq, int *mid, int topic_count, char *const *const topic, const mosquitto_property *properties)
|
{
|
/* FIXME - only deals with a single topic */
|
struct mosquitto__packet *packet = NULL;
|
uint32_t packetlen;
|
uint16_t local_mid;
|
int rc;
|
int proplen, varbytes;
|
int i;
|
|
assert(mosq);
|
assert(topic);
|
|
packet = mosquitto__calloc(1, sizeof(struct mosquitto__packet));
|
if(!packet) return MOSQ_ERR_NOMEM;
|
|
packetlen = 2;
|
|
for(i=0; i<topic_count; i++){
|
packetlen += 2+strlen(topic[i]);
|
}
|
if(mosq->protocol == mosq_p_mqtt5){
|
proplen = property__get_length_all(properties);
|
varbytes = packet__varint_bytes(proplen);
|
packetlen += proplen + varbytes;
|
}
|
|
packet->command = CMD_UNSUBSCRIBE | (1<<1);
|
packet->remaining_length = packetlen;
|
rc = packet__alloc(packet);
|
if(rc){
|
mosquitto__free(packet);
|
return rc;
|
}
|
|
/* Variable header */
|
local_mid = mosquitto__mid_generate(mosq);
|
if(mid) *mid = (int)local_mid;
|
packet__write_uint16(packet, local_mid);
|
|
if(mosq->protocol == mosq_p_mqtt5){
|
/* We don't use User Property yet. */
|
property__write_all(packet, properties, true);
|
}
|
|
/* Payload */
|
for(i=0; i<topic_count; i++){
|
packet__write_string(packet, topic[i], strlen(topic[i]));
|
}
|
|
#ifdef WITH_BROKER
|
# ifdef WITH_BRIDGE
|
for(i=0; i<topic_count; i++){
|
log__printf(mosq, MOSQ_LOG_DEBUG, "Bridge %s sending UNSUBSCRIBE (Mid: %d, Topic: %s)", mosq->id, local_mid, topic[i]);
|
}
|
# endif
|
#else
|
for(i=0; i<topic_count; i++){
|
log__printf(mosq, MOSQ_LOG_DEBUG, "Client %s sending UNSUBSCRIBE (Mid: %d, Topic: %s)", mosq->id, local_mid, topic[i]);
|
}
|
#endif
|
return packet__queue(mosq, packet);
|
}
|
