/*
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Copyright (c) 2010-2019 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 <string.h>
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#include "mosquitto.h"
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#include "mosquitto_internal.h"
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#include "memory_mosq.h"
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#include "messages_mosq.h"
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#include "mqtt_protocol.h"
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#include "net_mosq.h"
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#include "packet_mosq.h"
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#include "send_mosq.h"
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#include "util_mosq.h"
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int mosquitto_publish(struct mosquitto *mosq, int *mid, const char *topic, int payloadlen, const void *payload, int qos, bool retain)
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{
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return mosquitto_publish_v5(mosq, mid, topic, payloadlen, payload, qos, retain, NULL);
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}
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int mosquitto_publish_v5(struct mosquitto *mosq, int *mid, const char *topic, int payloadlen, const void *payload, int qos, bool retain, const mosquitto_property *properties)
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{
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struct mosquitto_message_all *message;
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uint16_t local_mid;
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const mosquitto_property *p;
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const mosquitto_property *outgoing_properties = NULL;
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mosquitto_property local_property;
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bool have_topic_alias;
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int rc;
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int tlen = 0;
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uint32_t remaining_length;
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if(!mosq || qos<0 || qos>2) return MOSQ_ERR_INVAL;
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if(mosq->protocol != mosq_p_mqtt5 && properties) return MOSQ_ERR_NOT_SUPPORTED;
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if(qos > mosq->maximum_qos) return MOSQ_ERR_QOS_NOT_SUPPORTED;
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if(properties){
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if(properties->client_generated){
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outgoing_properties = properties;
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}else{
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memcpy(&local_property, properties, sizeof(mosquitto_property));
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local_property.client_generated = true;
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local_property.next = NULL;
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outgoing_properties = &local_property;
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}
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rc = mosquitto_property_check_all(CMD_PUBLISH, outgoing_properties);
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if(rc) return rc;
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}
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if(!topic || STREMPTY(topic)){
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if(topic) topic = NULL;
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if(mosq->protocol == mosq_p_mqtt5){
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p = outgoing_properties;
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have_topic_alias = false;
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while(p){
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if(p->identifier == MQTT_PROP_TOPIC_ALIAS){
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have_topic_alias = true;
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break;
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}
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p = p->next;
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}
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if(have_topic_alias == false){
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return MOSQ_ERR_INVAL;
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}
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}else{
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return MOSQ_ERR_INVAL;
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}
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}else{
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tlen = strlen(topic);
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if(mosquitto_validate_utf8(topic, tlen)) return MOSQ_ERR_MALFORMED_UTF8;
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if(payloadlen < 0 || payloadlen > MQTT_MAX_PAYLOAD) return MOSQ_ERR_PAYLOAD_SIZE;
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if(mosquitto_pub_topic_check(topic) != MOSQ_ERR_SUCCESS){
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return MOSQ_ERR_INVAL;
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}
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}
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if(mosq->maximum_packet_size > 0){
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remaining_length = 1 + 2+tlen + payloadlen + property__get_length_all(outgoing_properties);
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if(qos > 0){
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remaining_length++;
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}
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if(packet__check_oversize(mosq, remaining_length)){
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return MOSQ_ERR_OVERSIZE_PACKET;
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}
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}
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local_mid = mosquitto__mid_generate(mosq);
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if(mid){
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*mid = local_mid;
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}
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if(qos == 0){
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return send__publish(mosq, local_mid, topic, payloadlen, payload, qos, retain, false, outgoing_properties, NULL, 0);
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}else{
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message = mosquitto__calloc(1, sizeof(struct mosquitto_message_all));
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if(!message) return MOSQ_ERR_NOMEM;
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message->next = NULL;
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message->timestamp = mosquitto_time();
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message->msg.mid = local_mid;
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if(topic){
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message->msg.topic = mosquitto__strdup(topic);
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if(!message->msg.topic){
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message__cleanup(&message);
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return MOSQ_ERR_NOMEM;
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}
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}
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if(payloadlen){
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message->msg.payloadlen = payloadlen;
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message->msg.payload = mosquitto__malloc(payloadlen*sizeof(uint8_t));
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if(!message->msg.payload){
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message__cleanup(&message);
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return MOSQ_ERR_NOMEM;
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}
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memcpy(message->msg.payload, payload, payloadlen*sizeof(uint8_t));
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}else{
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message->msg.payloadlen = 0;
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message->msg.payload = NULL;
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}
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message->msg.qos = qos;
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message->msg.retain = retain;
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message->dup = false;
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pthread_mutex_lock(&mosq->msgs_out.mutex);
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message->state = mosq_ms_invalid;
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message__queue(mosq, message, mosq_md_out);
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pthread_mutex_unlock(&mosq->msgs_out.mutex);
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return MOSQ_ERR_SUCCESS;
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}
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}
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int mosquitto_subscribe(struct mosquitto *mosq, int *mid, const char *sub, int qos)
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{
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return mosquitto_subscribe_multiple(mosq, mid, 1, (char *const *const)&sub, qos, 0, NULL);
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}
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int mosquitto_subscribe_v5(struct mosquitto *mosq, int *mid, const char *sub, int qos, int options, const mosquitto_property *properties)
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{
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return mosquitto_subscribe_multiple(mosq, mid, 1, (char *const *const)&sub, qos, options, properties);
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}
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int mosquitto_subscribe_multiple(struct mosquitto *mosq, int *mid, int sub_count, char *const *const sub, int qos, int options, const mosquitto_property *properties)
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{
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const mosquitto_property *outgoing_properties = NULL;
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mosquitto_property local_property;
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int i;
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int rc;
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uint32_t remaining_length = 0;
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int slen;
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if(!mosq || !sub_count || !sub) return MOSQ_ERR_INVAL;
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if(mosq->protocol != mosq_p_mqtt5 && properties) return MOSQ_ERR_NOT_SUPPORTED;
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if(qos < 0 || qos > 2) return MOSQ_ERR_INVAL;
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if((options & 0x30) == 0x30 || (options & 0xC0) != 0) return MOSQ_ERR_INVAL;
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if(mosq->sock == INVALID_SOCKET) return MOSQ_ERR_NO_CONN;
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if(properties){
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if(properties->client_generated){
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outgoing_properties = properties;
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}else{
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memcpy(&local_property, properties, sizeof(mosquitto_property));
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local_property.client_generated = true;
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local_property.next = NULL;
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outgoing_properties = &local_property;
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}
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rc = mosquitto_property_check_all(CMD_SUBSCRIBE, outgoing_properties);
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if(rc) return rc;
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}
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for(i=0; i<sub_count; i++){
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if(mosquitto_sub_topic_check(sub[i])) return MOSQ_ERR_INVAL;
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slen = strlen(sub[i]);
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if(mosquitto_validate_utf8(sub[i], slen)) return MOSQ_ERR_MALFORMED_UTF8;
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remaining_length += 2+slen + 1;
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}
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if(mosq->maximum_packet_size > 0){
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remaining_length += 2 + property__get_length_all(outgoing_properties);
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if(packet__check_oversize(mosq, remaining_length)){
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return MOSQ_ERR_OVERSIZE_PACKET;
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}
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}
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return send__subscribe(mosq, mid, sub_count, sub, qos|options, outgoing_properties);
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}
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int mosquitto_unsubscribe(struct mosquitto *mosq, int *mid, const char *sub)
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{
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return mosquitto_unsubscribe_multiple(mosq, mid, 1, (char *const *const)&sub, NULL);
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}
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int mosquitto_unsubscribe_v5(struct mosquitto *mosq, int *mid, const char *sub, const mosquitto_property *properties)
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{
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return mosquitto_unsubscribe_multiple(mosq, mid, 1, (char *const *const)&sub, properties);
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}
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int mosquitto_unsubscribe_multiple(struct mosquitto *mosq, int *mid, int sub_count, char *const *const sub, const mosquitto_property *properties)
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{
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const mosquitto_property *outgoing_properties = NULL;
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mosquitto_property local_property;
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int rc;
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int i;
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uint32_t remaining_length = 0;
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int slen;
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if(!mosq) return MOSQ_ERR_INVAL;
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if(mosq->protocol != mosq_p_mqtt5 && properties) return MOSQ_ERR_NOT_SUPPORTED;
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if(mosq->sock == INVALID_SOCKET) return MOSQ_ERR_NO_CONN;
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if(properties){
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if(properties->client_generated){
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outgoing_properties = properties;
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}else{
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memcpy(&local_property, properties, sizeof(mosquitto_property));
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local_property.client_generated = true;
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local_property.next = NULL;
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outgoing_properties = &local_property;
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}
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rc = mosquitto_property_check_all(CMD_UNSUBSCRIBE, outgoing_properties);
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if(rc) return rc;
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}
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for(i=0; i<sub_count; i++){
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if(mosquitto_sub_topic_check(sub[i])) return MOSQ_ERR_INVAL;
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slen = strlen(sub[i]);
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if(mosquitto_validate_utf8(sub[i], slen)) return MOSQ_ERR_MALFORMED_UTF8;
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remaining_length += 2+slen;
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}
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if(mosq->maximum_packet_size > 0){
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remaining_length += 2 + property__get_length_all(outgoing_properties);
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if(packet__check_oversize(mosq, remaining_length)){
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return MOSQ_ERR_OVERSIZE_PACKET;
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}
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}
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return send__unsubscribe(mosq, mid, sub_count, sub, outgoing_properties);
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}
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