#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)
{
struct mosquitto__packet *packet = NULL;
uint32_t packetlen;
uint16_t local_mid;
int rc;
int i;
size_t tlen;
assert(mosq);
assert(topic);
packetlen = 2;
for(i=0; i<topic_count; i++){
tlen = strlen(topic[i]);
if(tlen > UINT16_MAX){
return MOSQ_ERR_INVAL;
}
packetlen += 2U+(uint16_t)tlen;
}
packet = mosquitto__calloc(1, sizeof(struct mosquitto__packet));
if(!packet) return MOSQ_ERR_NOMEM;
if(mosq->protocol == mosq_p_mqtt5){
packetlen += property__get_remaining_length(properties);
}
packet->command = CMD_UNSUBSCRIBE | (1<<1);
packet->remaining_length = packetlen;
rc = packet__alloc(packet);
if(rc){
mosquitto__free(packet);
return rc;
}
local_mid = mosquitto__mid_generate(mosq);
if(mid) *mid = (int)local_mid;
packet__write_uint16(packet, local_mid);
if(mosq->protocol == mosq_p_mqtt5){
property__write_all(packet, properties, true);
}
for(i=0; i<topic_count; i++){
packet__write_string(packet, topic[i], (uint16_t)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);
}