map/das-dn/third_party/mqtt/send_mosq.c

/*
Copyright (c) 2009-2020 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 2.0
and Eclipse Distribution License v1.0 which accompany this distribution.

The Eclipse Public License is available at
   https://www.eclipse.org/legal/epl-2.0/
and the Eclipse Distribution License is available at
  http://www.eclipse.org/org/documents/edl-v10.php.

SPDX-License-Identifier: EPL-2.0 OR BSD-3-Clause

Contributors:
   Roger Light - initial implementation and documentation.
*/

#include "config.h"

#include <assert.h>
#include <stdio.h>
#include <string.h>

#define G_PUB_BYTES_SENT_INC(A)

#include "mosquitto.h"
#include "mosquitto_internal.h"
#include "logging_mosq.h"
#include "mqtt_protocol.h"
#include "memory_mosq.h"
#include "net_mosq.h"
#include "packet_mosq.h"
#include "property_mosq.h"
#include "send_mosq.h"
#include "time_mosq.h"
#include "util_mosq.h"

int send__pingreq(struct mosquitto *mosq)
{
	int rc;
	assert(mosq);
	log__printf(mosq, MOSQ_LOG_DEBUG, "Client %s sending PINGREQ", SAFE_PRINT(mosq->id));

	rc = send__simple_command(mosq, CMD_PINGREQ);
	if(rc == MOSQ_ERR_SUCCESS){
		mosq->ping_t = mosquitto_time();
	}
	return rc;
}

int send__pingresp(struct mosquitto *mosq)
{
	log__printf(mosq, MOSQ_LOG_DEBUG, "Client %s sending PINGRESP", SAFE_PRINT(mosq->id));
	return send__simple_command(mosq, CMD_PINGRESP);
}

int send__puback(struct mosquitto *mosq, uint16_t mid, uint8_t reason_code, const mosquitto_property *properties)
{
	log__printf(mosq, MOSQ_LOG_DEBUG, "Client %s sending PUBACK (m%d, rc%d)", SAFE_PRINT(mosq->id), mid, reason_code);
	util__increment_receive_quota(mosq);
	/* We don't use Reason String or User Property yet. */
	return send__command_with_mid(mosq, CMD_PUBACK, mid, false, reason_code, properties);
}

int send__pubcomp(struct mosquitto *mosq, uint16_t mid, const mosquitto_property *properties)
{
	log__printf(mosq, MOSQ_LOG_DEBUG, "Client %s sending PUBCOMP (m%d)", SAFE_PRINT(mosq->id), mid);
	util__increment_receive_quota(mosq);
	/* We don't use Reason String or User Property yet. */
	return send__command_with_mid(mosq, CMD_PUBCOMP, mid, false, 0, properties);
}


int send__pubrec(struct mosquitto *mosq, uint16_t mid, uint8_t reason_code, const mosquitto_property *properties)
{
	log__printf(mosq, MOSQ_LOG_DEBUG, "Client %s sending PUBREC (m%d, rc%d)", SAFE_PRINT(mosq->id), mid, reason_code);
	if(reason_code >= 0x80 && mosq->protocol == mosq_p_mqtt5){
		util__increment_receive_quota(mosq);
	}
	/* We don't use Reason String or User Property yet. */
	return send__command_with_mid(mosq, CMD_PUBREC, mid, false, reason_code, properties);
}

int send__pubrel(struct mosquitto *mosq, uint16_t mid, const mosquitto_property *properties)
{
	log__printf(mosq, MOSQ_LOG_DEBUG, "Client %s sending PUBREL (m%d)", SAFE_PRINT(mosq->id), mid);
	/* We don't use Reason String or User Property yet. */
	return send__command_with_mid(mosq, CMD_PUBREL|2, mid, false, 0, properties);
}

/* For PUBACK, PUBCOMP, PUBREC, and PUBREL */
int send__command_with_mid(struct mosquitto *mosq, uint8_t command, uint16_t mid, bool dup, uint8_t reason_code, const mosquitto_property *properties)
{
	struct mosquitto__packet *packet = NULL;
	int rc;

	assert(mosq);
	packet = mosquitto__calloc(1, sizeof(struct mosquitto__packet));
	if(!packet) return MOSQ_ERR_NOMEM;

	packet->command = command;
	if(dup){
		packet->command |= 8;
	}
	packet->remaining_length = 2;

	if(mosq->protocol == mosq_p_mqtt5){
		if(reason_code != 0 || properties){
			packet->remaining_length += 1;
		}

		if(properties){
			packet->remaining_length += property__get_remaining_length(properties);
		}
	}

	rc = packet__alloc(packet);
	if(rc){
		mosquitto__free(packet);
		return rc;
	}

	packet__write_uint16(packet, mid);

	if(mosq->protocol == mosq_p_mqtt5){
		if(reason_code != 0 || properties){
			packet__write_byte(packet, reason_code);
		}
		if(properties){
			property__write_all(packet, properties, true);
		}
	}

	return packet__queue(mosq, packet);
}

/* For DISCONNECT, PINGREQ and PINGRESP */
int send__simple_command(struct mosquitto *mosq, uint8_t command)
{
	struct mosquitto__packet *packet = NULL;
	int rc;

	assert(mosq);
	packet = mosquitto__calloc(1, sizeof(struct mosquitto__packet));
	if(!packet) return MOSQ_ERR_NOMEM;

	packet->command = command;
	packet->remaining_length = 0;

	rc = packet__alloc(packet);
	if(rc){
		mosquitto__free(packet);
		return rc;
	}

	return packet__queue(mosq, packet);
}