/*
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Copyright (c) 2009-2019 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 "mosquitto_broker_internal.h"
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#include "mqtt_protocol.h"
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#include "memory_mosq.h"
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#include "packet_mosq.h"
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#include "property_mosq.h"
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#include "util_mosq.h"
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int send__connack(struct mosquitto_db *db, struct mosquitto *context, int ack, int reason_code, const mosquitto_property *properties)
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{
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struct mosquitto__packet *packet = NULL;
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int rc;
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mosquitto_property *connack_props = NULL;
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int proplen, varbytes;
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uint32_t remaining_length;
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rc = mosquitto_property_copy_all(&connack_props, properties);
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if(rc){
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return rc;
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}
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if(context->id){
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log__printf(NULL, MOSQ_LOG_DEBUG, "Sending CONNACK to %s (%d, %d)", context->id, ack, reason_code);
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}else{
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log__printf(NULL, MOSQ_LOG_DEBUG, "Sending CONNACK to %s (%d, %d)", context->address, ack, reason_code);
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}
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remaining_length = 2;
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if(context->protocol == mosq_p_mqtt5){
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if(reason_code < 128 && db->config->retain_available == false){
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rc = mosquitto_property_add_byte(&connack_props, MQTT_PROP_RETAIN_AVAILABLE, 0);
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if(rc){
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mosquitto_property_free_all(&connack_props);
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return rc;
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}
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}
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if(db->config->max_packet_size > 0){
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rc = mosquitto_property_add_int32(&connack_props, MQTT_PROP_MAXIMUM_PACKET_SIZE, db->config->max_packet_size);
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if(rc){
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mosquitto_property_free_all(&connack_props);
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return rc;
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}
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}
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proplen = property__get_length_all(connack_props);
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varbytes = packet__varint_bytes(proplen);
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remaining_length += proplen + varbytes;
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}
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if(packet__check_oversize(context, remaining_length)){
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mosquitto_property_free_all(&connack_props);
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mosquitto__free(packet);
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return MOSQ_ERR_OVERSIZE_PACKET;
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}
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packet = mosquitto__calloc(1, sizeof(struct mosquitto__packet));
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if(!packet) return MOSQ_ERR_NOMEM;
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packet->command = CMD_CONNACK;
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packet->remaining_length = remaining_length;
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rc = packet__alloc(packet);
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if(rc){
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mosquitto_property_free_all(&connack_props);
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mosquitto__free(packet);
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return rc;
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}
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packet__write_byte(packet, ack);
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packet__write_byte(packet, reason_code);
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if(context->protocol == mosq_p_mqtt5){
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property__write_all(packet, connack_props, true);
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}
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mosquitto_property_free_all(&connack_props);
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return packet__queue(context, packet);
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}
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