mosquitto/lib/will_mosq.c

/*
Copyright (c) 2010-2014 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 <assert.h>
#include <errno.h>
#include <stdio.h>
#include <string.h>
#ifndef WIN32
#include <sys/select.h>
#include <unistd.h>
#else
#include <winsock2.h>
typedef int ssize_t;
#endif

#include <mosquitto.h>
#include <mosquitto_internal.h>
#include <logging_mosq.h>
#include <messages_mosq.h>
#include <memory_mosq.h>
#include <mqtt3_protocol.h>
#include <net_mosq.h>
#include <read_handle.h>
#include <send_mosq.h>
#include <util_mosq.h>

int _mosquitto_will_set(struct mosquitto *mosq, const char *topic, int payloadlen, const void *payload, int qos, bool retain)
{
	int rc = MOSQ_ERR_SUCCESS;

	if(!mosq || !topic) return MOSQ_ERR_INVAL;
	if(payloadlen < 0 || payloadlen > MQTT_MAX_PAYLOAD) return MOSQ_ERR_PAYLOAD_SIZE;
	if(payloadlen > 0 && !payload) return MOSQ_ERR_INVAL;

	if(mosquitto_pub_topic_check(topic)) return MOSQ_ERR_INVAL;

	if(mosq->will){
		if(mosq->will->topic){
			_mosquitto_free(mosq->will->topic);
			mosq->will->topic = NULL;
		}
		if(mosq->will->payload){
			_mosquitto_free(mosq->will->payload);
			mosq->will->payload = NULL;
		}
		_mosquitto_free(mosq->will);
		mosq->will = NULL;
	}

	mosq->will = _mosquitto_calloc(1, sizeof(struct mosquitto_message));
	if(!mosq->will) return MOSQ_ERR_NOMEM;
	mosq->will->topic = _mosquitto_strdup(topic);
	if(!mosq->will->topic){
		rc = MOSQ_ERR_NOMEM;
		goto cleanup;
	}
	mosq->will->payloadlen = payloadlen;
	if(mosq->will->payloadlen > 0){
		if(!payload){
			rc = MOSQ_ERR_INVAL;
			goto cleanup;
		}
		mosq->will->payload = _mosquitto_malloc(sizeof(char)*mosq->will->payloadlen);
		if(!mosq->will->payload){
			rc = MOSQ_ERR_NOMEM;
			goto cleanup;
		}

		memcpy(mosq->will->payload, payload, payloadlen);
	}
	mosq->will->qos = qos;
	mosq->will->retain = retain;

	return MOSQ_ERR_SUCCESS;

cleanup:
	if(mosq->will){
		if(mosq->will->topic) _mosquitto_free(mosq->will->topic);
		if(mosq->will->payload) _mosquitto_free(mosq->will->payload);
	}
	_mosquitto_free(mosq->will);
	mosq->will = NULL;

	return rc;
}

int _mosquitto_will_clear(struct mosquitto *mosq)
{
	if(!mosq->will) return MOSQ_ERR_SUCCESS;

	if(mosq->will->topic){
		_mosquitto_free(mosq->will->topic);
		mosq->will->topic = NULL;
	}
	if(mosq->will->payload){
		_mosquitto_free(mosq->will->payload);
		mosq->will->payload = NULL;
	}
	_mosquitto_free(mosq->will);
	mosq->will = NULL;

	return MOSQ_ERR_SUCCESS;
}