/*
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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 <assert.h>
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#include <stdlib.h>
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#include <string.h>
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#include <utlist.h>
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#include "mosquitto_internal.h"
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#include "mosquitto.h"
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#include "memory_mosq.h"
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#include "messages_mosq.h"
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#include "send_mosq.h"
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#include "time_mosq.h"
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#include "util_mosq.h"
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void message__cleanup(struct mosquitto_message_all **message)
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{
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struct mosquitto_message_all *msg;
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if(!message || !*message) return;
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msg = *message;
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mosquitto__free(msg->msg.topic);
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mosquitto__free(msg->msg.payload);
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mosquitto__free(msg);
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}
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void message__cleanup_all(struct mosquitto *mosq)
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{
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struct mosquitto_message_all *tail, *tmp;
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assert(mosq);
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DL_FOREACH_SAFE(mosq->msgs_in.inflight, tail, tmp){
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DL_DELETE(mosq->msgs_in.inflight, tail);
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message__cleanup(&tail);
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}
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DL_FOREACH_SAFE(mosq->msgs_out.inflight, tail, tmp){
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DL_DELETE(mosq->msgs_out.inflight, tail);
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message__cleanup(&tail);
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}
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}
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int mosquitto_message_copy(struct mosquitto_message *dst, const struct mosquitto_message *src)
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{
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if(!dst || !src) return MOSQ_ERR_INVAL;
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dst->mid = src->mid;
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dst->topic = mosquitto__strdup(src->topic);
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if(!dst->topic) return MOSQ_ERR_NOMEM;
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dst->qos = src->qos;
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dst->retain = src->retain;
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if(src->payloadlen){
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dst->payload = mosquitto__calloc(src->payloadlen+1, sizeof(uint8_t));
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if(!dst->payload){
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mosquitto__free(dst->topic);
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return MOSQ_ERR_NOMEM;
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}
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memcpy(dst->payload, src->payload, src->payloadlen);
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dst->payloadlen = src->payloadlen;
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}else{
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dst->payloadlen = 0;
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dst->payload = NULL;
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}
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return MOSQ_ERR_SUCCESS;
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}
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int message__delete(struct mosquitto *mosq, uint16_t mid, enum mosquitto_msg_direction dir, int qos)
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{
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struct mosquitto_message_all *message;
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int rc;
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assert(mosq);
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rc = message__remove(mosq, mid, dir, &message, qos);
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if(rc == MOSQ_ERR_SUCCESS){
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message__cleanup(&message);
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}
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return rc;
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}
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void mosquitto_message_free(struct mosquitto_message **message)
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{
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struct mosquitto_message *msg;
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if(!message || !*message) return;
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msg = *message;
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mosquitto__free(msg->topic);
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mosquitto__free(msg->payload);
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mosquitto__free(msg);
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}
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void mosquitto_message_free_contents(struct mosquitto_message *message)
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{
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if(!message) return;
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mosquitto__free(message->topic);
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mosquitto__free(message->payload);
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}
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int message__queue(struct mosquitto *mosq, struct mosquitto_message_all *message, enum mosquitto_msg_direction dir)
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{
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/* mosq->*_message_mutex should be locked before entering this function */
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assert(mosq);
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assert(message);
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assert(message->msg.qos != 0);
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if(dir == mosq_md_out){
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DL_APPEND(mosq->msgs_out.inflight, message);
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mosq->msgs_out.queue_len++;
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}else{
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DL_APPEND(mosq->msgs_in.inflight, message);
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mosq->msgs_in.queue_len++;
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}
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return message__release_to_inflight(mosq, dir);
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}
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void message__reconnect_reset(struct mosquitto *mosq)
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{
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struct mosquitto_message_all *message, *tmp;
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assert(mosq);
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pthread_mutex_lock(&mosq->msgs_in.mutex);
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mosq->msgs_in.inflight_quota = mosq->msgs_in.inflight_maximum;
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mosq->msgs_in.queue_len = 0;
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DL_FOREACH_SAFE(mosq->msgs_in.inflight, message, tmp){
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mosq->msgs_in.queue_len++;
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message->timestamp = 0;
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if(message->msg.qos != 2){
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DL_DELETE(mosq->msgs_in.inflight, message);
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message__cleanup(&message);
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}else{
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/* Message state can be preserved here because it should match
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* whatever the client has got. */
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util__decrement_receive_quota(mosq);
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}
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}
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pthread_mutex_unlock(&mosq->msgs_in.mutex);
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pthread_mutex_lock(&mosq->msgs_out.mutex);
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mosq->msgs_out.inflight_quota = mosq->msgs_out.inflight_maximum;
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mosq->msgs_out.queue_len = 0;
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DL_FOREACH_SAFE(mosq->msgs_out.inflight, message, tmp){
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mosq->msgs_out.queue_len++;
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message->timestamp = 0;
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if(mosq->msgs_out.inflight_quota != 0){
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util__decrement_send_quota(mosq);
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if(message->msg.qos == 1){
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message->state = mosq_ms_publish_qos1;
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}else if(message->msg.qos == 2){
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if(message->state == mosq_ms_wait_for_pubrec){
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message->state = mosq_ms_publish_qos2;
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}else if(message->state == mosq_ms_wait_for_pubcomp){
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message->state = mosq_ms_resend_pubrel;
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}
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/* Should be able to preserve state. */
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}
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}else{
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message->state = mosq_ms_invalid;
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}
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}
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pthread_mutex_unlock(&mosq->msgs_out.mutex);
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}
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int message__release_to_inflight(struct mosquitto *mosq, enum mosquitto_msg_direction dir)
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{
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/* mosq->*_message_mutex should be locked before entering this function */
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struct mosquitto_message_all *cur, *tmp;
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int rc = MOSQ_ERR_SUCCESS;
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if(dir == mosq_md_out){
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DL_FOREACH_SAFE(mosq->msgs_out.inflight, cur, tmp){
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if(mosq->msgs_out.inflight_quota > 0){
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if(cur->msg.qos > 0 && cur->state == mosq_ms_invalid){
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if(cur->msg.qos == 1){
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cur->state = mosq_ms_wait_for_puback;
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}else if(cur->msg.qos == 2){
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cur->state = mosq_ms_wait_for_pubrec;
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}
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rc = send__publish(mosq, cur->msg.mid, cur->msg.topic, cur->msg.payloadlen, cur->msg.payload, cur->msg.qos, cur->msg.retain, cur->dup, NULL, NULL, 0);
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if(rc){
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return rc;
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}
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util__decrement_send_quota(mosq);
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}
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}else{
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return MOSQ_ERR_SUCCESS;
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}
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}
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}
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return rc;
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}
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int message__remove(struct mosquitto *mosq, uint16_t mid, enum mosquitto_msg_direction dir, struct mosquitto_message_all **message, int qos)
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{
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struct mosquitto_message_all *cur, *tmp;
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bool found = false;
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assert(mosq);
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assert(message);
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if(dir == mosq_md_out){
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pthread_mutex_lock(&mosq->msgs_out.mutex);
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DL_FOREACH_SAFE(mosq->msgs_out.inflight, cur, tmp){
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if(found == false && cur->msg.mid == mid){
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if(cur->msg.qos != qos){
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pthread_mutex_unlock(&mosq->msgs_out.mutex);
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return MOSQ_ERR_PROTOCOL;
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}
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DL_DELETE(mosq->msgs_out.inflight, cur);
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*message = cur;
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mosq->msgs_out.queue_len--;
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found = true;
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break;
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}
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}
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pthread_mutex_unlock(&mosq->msgs_out.mutex);
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if(found){
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return MOSQ_ERR_SUCCESS;
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}else{
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return MOSQ_ERR_NOT_FOUND;
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}
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}else{
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pthread_mutex_lock(&mosq->msgs_in.mutex);
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DL_FOREACH_SAFE(mosq->msgs_in.inflight, cur, tmp){
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if(cur->msg.mid == mid){
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if(cur->msg.qos != qos){
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pthread_mutex_unlock(&mosq->msgs_in.mutex);
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return MOSQ_ERR_PROTOCOL;
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}
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DL_DELETE(mosq->msgs_in.inflight, cur);
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*message = cur;
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mosq->msgs_in.queue_len--;
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found = true;
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break;
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}
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}
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pthread_mutex_unlock(&mosq->msgs_in.mutex);
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if(found){
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return MOSQ_ERR_SUCCESS;
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}else{
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return MOSQ_ERR_NOT_FOUND;
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}
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}
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}
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void message__retry_check(struct mosquitto *mosq)
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{
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struct mosquitto_message_all *msg;
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time_t now = mosquitto_time();
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assert(mosq);
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#ifdef WITH_THREADING
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pthread_mutex_lock(&mosq->msgs_out.mutex);
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#endif
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DL_FOREACH(mosq->msgs_out.inflight, msg){
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switch(msg->state){
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case mosq_ms_publish_qos1:
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case mosq_ms_publish_qos2:
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msg->timestamp = now;
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msg->dup = true;
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send__publish(mosq, msg->msg.mid, msg->msg.topic, msg->msg.payloadlen, msg->msg.payload, msg->msg.qos, msg->msg.retain, msg->dup, NULL, NULL, 0);
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break;
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case mosq_ms_wait_for_pubrel:
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msg->timestamp = now;
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msg->dup = true;
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send__pubrec(mosq, msg->msg.mid, 0);
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break;
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case mosq_ms_resend_pubrel:
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case mosq_ms_wait_for_pubcomp:
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msg->timestamp = now;
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msg->dup = true;
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send__pubrel(mosq, msg->msg.mid);
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break;
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default:
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break;
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}
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}
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#ifdef WITH_THREADING
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pthread_mutex_unlock(&mosq->msgs_out.mutex);
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#endif
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}
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void mosquitto_message_retry_set(struct mosquitto *mosq, unsigned int message_retry)
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{
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UNUSED(mosq);
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UNUSED(message_retry);
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}
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int message__out_update(struct mosquitto *mosq, uint16_t mid, enum mosquitto_msg_state state, int qos)
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{
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struct mosquitto_message_all *message, *tmp;
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assert(mosq);
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pthread_mutex_lock(&mosq->msgs_out.mutex);
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DL_FOREACH_SAFE(mosq->msgs_out.inflight, message, tmp){
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if(message->msg.mid == mid){
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if(message->msg.qos != qos){
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pthread_mutex_unlock(&mosq->msgs_out.mutex);
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return MOSQ_ERR_PROTOCOL;
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}
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message->state = state;
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message->timestamp = mosquitto_time();
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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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pthread_mutex_unlock(&mosq->msgs_out.mutex);
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return MOSQ_ERR_NOT_FOUND;
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}
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int mosquitto_max_inflight_messages_set(struct mosquitto *mosq, unsigned int max_inflight_messages)
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{
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if(!mosq) return MOSQ_ERR_INVAL;
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mosq->send_maximum = max_inflight_messages;
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return MOSQ_ERR_SUCCESS;
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}
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