#include "config.h"
#include "mosquitto_broker_internal.h"
#include "mqtt_protocol.h"
#include "memory_mosq.h"
#include "packet_mosq.h"
#include "property_mosq.h"
#include "util_mosq.h"
int send__connack(struct mosquitto *context, uint8_t ack, uint8_t reason_code, const mosquitto_property *properties)
{
struct mosquitto__packet *packet = NULL;
int rc;
mosquitto_property *connack_props = NULL;
uint32_t remaining_length;
rc = mosquitto_property_copy_all(&connack_props, properties);
if(rc){
return rc;
}
if(context->id){
log__printf(NULL, MOSQ_LOG_DEBUG, "Sending CONNACK to %s (%d, %d)", context->id, ack, reason_code);
}else{
log__printf(NULL, MOSQ_LOG_DEBUG, "Sending CONNACK to %s (%d, %d)", context->address, ack, reason_code);
}
remaining_length = 2;
if(context->protocol == mosq_p_mqtt5){
if(reason_code < 128 && db.config->retain_available == false){
rc = mosquitto_property_add_byte(&connack_props, MQTT_PROP_RETAIN_AVAILABLE, 0);
if(rc){
mosquitto_property_free_all(&connack_props);
return rc;
}
}
if(reason_code < 128 && db.config->max_packet_size > 0){
rc = mosquitto_property_add_int32(&connack_props, MQTT_PROP_MAXIMUM_PACKET_SIZE, db.config->max_packet_size);
if(rc){
mosquitto_property_free_all(&connack_props);
return rc;
}
}
if(reason_code < 128 && db.config->max_inflight_messages > 0){
rc = mosquitto_property_add_int16(&connack_props, MQTT_PROP_RECEIVE_MAXIMUM, db.config->max_inflight_messages);
if(rc){
mosquitto_property_free_all(&connack_props);
return rc;
}
}
if(context->listener->max_qos != 2){
rc = mosquitto_property_add_byte(&connack_props, MQTT_PROP_MAXIMUM_QOS, context->listener->max_qos);
if(rc){
mosquitto_property_free_all(&connack_props);
return rc;
}
}
remaining_length += property__get_remaining_length(connack_props);
}
if(packet__check_oversize(context, remaining_length)){
mosquitto_property_free_all(&connack_props);
return MOSQ_ERR_OVERSIZE_PACKET;
}
packet = mosquitto__calloc(1, sizeof(struct mosquitto__packet));
if(!packet){
mosquitto_property_free_all(&connack_props);
return MOSQ_ERR_NOMEM;
}
packet->command = CMD_CONNACK;
packet->remaining_length = remaining_length;
rc = packet__alloc(packet);
if(rc){
mosquitto_property_free_all(&connack_props);
mosquitto__free(packet);
return rc;
}
packet__write_byte(packet, ack);
packet__write_byte(packet, reason_code);
if(context->protocol == mosq_p_mqtt5){
property__write_all(packet, connack_props, true);
}
mosquitto_property_free_all(&connack_props);
return packet__queue(context, packet);
}