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mosquitto.c
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mosquitto.c
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/*
Copyright (c) 2010-2014 Roger Light <[email protected]>
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:https://www.eclipse.org/legal/epl-v10.html
and the Eclipse Distribution License is available at
http:https://www.eclipse.org/org/documents/edl-v10.php.
Contributors:
Roger Light - initial implementation and documentation.
*/
#include <assert.h>
#include <errno.h>
#include <signal.h>
#include <stdio.h>
#include <string.h>
#ifndef WIN32
#include <sys/select.h>
#include <sys/time.h>
#include <unistd.h>
#else
#include <winsock2.h>
#include <windows.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 <socks_mosq.h>
#include <time_mosq.h>
#include <tls_mosq.h>
#include <util_mosq.h>
#include <will_mosq.h>
#include "config.h"
#if !defined(WIN32) && !defined(__SYMBIAN32__)
#define HAVE_PSELECT
#endif
void _mosquitto_destroy(struct mosquitto *mosq);
static int _mosquitto_reconnect(struct mosquitto *mosq, bool blocking);
static int _mosquitto_connect_init(struct mosquitto *mosq, const char *host, int port, int keepalive, const char *bind_address);
int mosquitto_lib_version(int *major, int *minor, int *revision)
{
if(major) *major = LIBMOSQUITTO_MAJOR;
if(minor) *minor = LIBMOSQUITTO_MINOR;
if(revision) *revision = LIBMOSQUITTO_REVISION;
return LIBMOSQUITTO_VERSION_NUMBER;
}
int mosquitto_lib_init(void)
{
#ifdef WIN32
srand(GetTickCount());
#else
struct timeval tv;
gettimeofday(&tv, NULL);
srand(tv.tv_sec*1000 + tv.tv_usec/1000);
#endif
_mosquitto_net_init();
return MOSQ_ERR_SUCCESS;
}
int mosquitto_lib_cleanup(void)
{
_mosquitto_net_cleanup();
return MOSQ_ERR_SUCCESS;
}
struct mosquitto *mosquitto_new(const char *id, bool clean_session, void *userdata)
{
struct mosquitto *mosq = NULL;
int rc;
if(clean_session == false && id == NULL){
errno = EINVAL;
return NULL;
}
#ifndef WIN32
signal(SIGPIPE, SIG_IGN);
#endif
mosq = (struct mosquitto *)_mosquitto_calloc(1, sizeof(struct mosquitto));
if(mosq){
mosq->sock = INVALID_SOCKET;
mosq->sockpairR = INVALID_SOCKET;
mosq->sockpairW = INVALID_SOCKET;
#ifdef WITH_THREADING
mosq->thread_id = pthread_self();
#endif
rc = mosquitto_reinitialise(mosq, id, clean_session, userdata);
if(rc){
mosquitto_destroy(mosq);
if(rc == MOSQ_ERR_INVAL){
errno = EINVAL;
}else if(rc == MOSQ_ERR_NOMEM){
errno = ENOMEM;
}
return NULL;
}
}else{
errno = ENOMEM;
}
return mosq;
}
int mosquitto_reinitialise(struct mosquitto *mosq, const char *id, bool clean_session, void *userdata)
{
int i;
if(!mosq) return MOSQ_ERR_INVAL;
if(clean_session == false && id == NULL){
return MOSQ_ERR_INVAL;
}
_mosquitto_destroy(mosq);
memset(mosq, 0, sizeof(struct mosquitto));
if(userdata){
mosq->userdata = userdata;
}else{
mosq->userdata = mosq;
}
mosq->protocol = mosq_p_mqtt31;
mosq->sock = INVALID_SOCKET;
mosq->sockpairR = INVALID_SOCKET;
mosq->sockpairW = INVALID_SOCKET;
mosq->keepalive = 60;
mosq->message_retry = 20;
mosq->last_retry_check = 0;
mosq->clean_session = clean_session;
if(id){
if(strlen(id) == 0){
return MOSQ_ERR_INVAL;
}
mosq->id = _mosquitto_strdup(id);
}else{
mosq->id = (char *)_mosquitto_calloc(24, sizeof(char));
if(!mosq->id){
return MOSQ_ERR_NOMEM;
}
mosq->id[0] = 'm';
mosq->id[1] = 'o';
mosq->id[2] = 's';
mosq->id[3] = 'q';
mosq->id[4] = '/';
for(i=5; i<23; i++){
mosq->id[i] = (rand()%73)+48;
}
}
mosq->in_packet.payload = NULL;
_mosquitto_packet_cleanup(&mosq->in_packet);
mosq->out_packet = NULL;
mosq->current_out_packet = NULL;
mosq->last_msg_in = mosquitto_time();
mosq->last_msg_out = mosquitto_time();
mosq->ping_t = 0;
mosq->last_mid = 0;
mosq->state = mosq_cs_new;
mosq->in_messages = NULL;
mosq->in_messages_last = NULL;
mosq->out_messages = NULL;
mosq->out_messages_last = NULL;
mosq->max_inflight_messages = 20;
mosq->will = NULL;
mosq->on_connect = NULL;
mosq->on_publish = NULL;
mosq->on_message = NULL;
mosq->on_subscribe = NULL;
mosq->on_unsubscribe = NULL;
mosq->host = NULL;
mosq->port = 1883;
mosq->in_callback = false;
mosq->in_queue_len = 0;
mosq->out_queue_len = 0;
mosq->reconnect_delay = 1;
mosq->reconnect_delay_max = 1;
mosq->reconnect_exponential_backoff = false;
mosq->threaded = false;
#ifdef WITH_TLS
mosq->ssl = NULL;
mosq->tls_cert_reqs = SSL_VERIFY_PEER;
mosq->tls_insecure = false;
mosq->want_write = false;
#endif
#ifdef WITH_THREADING
pthread_mutex_init(&mosq->callback_mutex, NULL);
pthread_mutex_init(&mosq->log_callback_mutex, NULL);
pthread_mutex_init(&mosq->state_mutex, NULL);
pthread_mutex_init(&mosq->out_packet_mutex, NULL);
pthread_mutex_init(&mosq->current_out_packet_mutex, NULL);
pthread_mutex_init(&mosq->msgtime_mutex, NULL);
pthread_mutex_init(&mosq->in_message_mutex, NULL);
pthread_mutex_init(&mosq->out_message_mutex, NULL);
pthread_mutex_init(&mosq->mid_mutex, NULL);
mosq->thread_id = pthread_self();
#endif
return MOSQ_ERR_SUCCESS;
}
int mosquitto_will_set(struct mosquitto *mosq, const char *topic, int payloadlen, const void *payload, int qos, bool retain)
{
if(!mosq) return MOSQ_ERR_INVAL;
return _mosquitto_will_set(mosq, topic, payloadlen, payload, qos, retain);
}
int mosquitto_will_clear(struct mosquitto *mosq)
{
if(!mosq) return MOSQ_ERR_INVAL;
return _mosquitto_will_clear(mosq);
}
int mosquitto_username_pw_set(struct mosquitto *mosq, const char *username, const char *password)
{
if(!mosq) return MOSQ_ERR_INVAL;
if(mosq->username){
_mosquitto_free(mosq->username);
mosq->username = NULL;
}
if(mosq->password){
_mosquitto_free(mosq->password);
mosq->password = NULL;
}
if(username){
mosq->username = _mosquitto_strdup(username);
if(!mosq->username) return MOSQ_ERR_NOMEM;
if(password){
mosq->password = _mosquitto_strdup(password);
if(!mosq->password){
_mosquitto_free(mosq->username);
mosq->username = NULL;
return MOSQ_ERR_NOMEM;
}
}
}
return MOSQ_ERR_SUCCESS;
}
int mosquitto_reconnect_delay_set(struct mosquitto *mosq, unsigned int reconnect_delay, unsigned int reconnect_delay_max, bool reconnect_exponential_backoff)
{
if(!mosq) return MOSQ_ERR_INVAL;
mosq->reconnect_delay = reconnect_delay;
mosq->reconnect_delay_max = reconnect_delay_max;
mosq->reconnect_exponential_backoff = reconnect_exponential_backoff;
return MOSQ_ERR_SUCCESS;
}
void _mosquitto_destroy(struct mosquitto *mosq)
{
struct _mosquitto_packet *packet;
if(!mosq) return;
#ifdef WITH_THREADING
if(mosq->threaded && !pthread_equal(mosq->thread_id, pthread_self())){
pthread_cancel(mosq->thread_id);
pthread_join(mosq->thread_id, NULL);
mosq->threaded = false;
}
if(mosq->id){
/* If mosq->id is not NULL then the client has already been initialised
* and so the mutexes need destroying. If mosq->id is NULL, the mutexes
* haven't been initialised. */
pthread_mutex_destroy(&mosq->callback_mutex);
pthread_mutex_destroy(&mosq->log_callback_mutex);
pthread_mutex_destroy(&mosq->state_mutex);
pthread_mutex_destroy(&mosq->out_packet_mutex);
pthread_mutex_destroy(&mosq->current_out_packet_mutex);
pthread_mutex_destroy(&mosq->msgtime_mutex);
pthread_mutex_destroy(&mosq->in_message_mutex);
pthread_mutex_destroy(&mosq->out_message_mutex);
pthread_mutex_destroy(&mosq->mid_mutex);
}
#endif
if(mosq->sock != INVALID_SOCKET){
_mosquitto_socket_close(mosq);
}
_mosquitto_message_cleanup_all(mosq);
_mosquitto_will_clear(mosq);
#ifdef WITH_TLS
if(mosq->ssl){
SSL_free(mosq->ssl);
}
if(mosq->ssl_ctx){
SSL_CTX_free(mosq->ssl_ctx);
}
if(mosq->tls_cafile) _mosquitto_free(mosq->tls_cafile);
if(mosq->tls_capath) _mosquitto_free(mosq->tls_capath);
if(mosq->tls_certfile) _mosquitto_free(mosq->tls_certfile);
if(mosq->tls_keyfile) _mosquitto_free(mosq->tls_keyfile);
if(mosq->tls_pw_callback) mosq->tls_pw_callback = NULL;
if(mosq->tls_version) _mosquitto_free(mosq->tls_version);
if(mosq->tls_ciphers) _mosquitto_free(mosq->tls_ciphers);
if(mosq->tls_psk) _mosquitto_free(mosq->tls_psk);
if(mosq->tls_psk_identity) _mosquitto_free(mosq->tls_psk_identity);
#endif
if(mosq->address){
_mosquitto_free(mosq->address);
mosq->address = NULL;
}
if(mosq->id){
_mosquitto_free(mosq->id);
mosq->id = NULL;
}
if(mosq->username){
_mosquitto_free(mosq->username);
mosq->username = NULL;
}
if(mosq->password){
_mosquitto_free(mosq->password);
mosq->password = NULL;
}
if(mosq->host){
_mosquitto_free(mosq->host);
mosq->host = NULL;
}
if(mosq->bind_address){
_mosquitto_free(mosq->bind_address);
mosq->bind_address = NULL;
}
/* Out packet cleanup */
if(mosq->out_packet && !mosq->current_out_packet){
mosq->current_out_packet = mosq->out_packet;
mosq->out_packet = mosq->out_packet->next;
}
while(mosq->current_out_packet){
packet = mosq->current_out_packet;
/* Free data and reset values */
mosq->current_out_packet = mosq->out_packet;
if(mosq->out_packet){
mosq->out_packet = mosq->out_packet->next;
}
_mosquitto_packet_cleanup(packet);
_mosquitto_free(packet);
}
_mosquitto_packet_cleanup(&mosq->in_packet);
if(mosq->sockpairR != INVALID_SOCKET){
COMPAT_CLOSE(mosq->sockpairR);
mosq->sockpairR = INVALID_SOCKET;
}
if(mosq->sockpairW != INVALID_SOCKET){
COMPAT_CLOSE(mosq->sockpairW);
mosq->sockpairW = INVALID_SOCKET;
}
}
void mosquitto_destroy(struct mosquitto *mosq)
{
if(!mosq) return;
_mosquitto_destroy(mosq);
_mosquitto_free(mosq);
}
int mosquitto_socket(struct mosquitto *mosq)
{
if(!mosq) return INVALID_SOCKET;
return mosq->sock;
}
static int _mosquitto_connect_init(struct mosquitto *mosq, const char *host, int port, int keepalive, const char *bind_address)
{
if(!mosq) return MOSQ_ERR_INVAL;
if(!host || port <= 0) return MOSQ_ERR_INVAL;
if(mosq->host) _mosquitto_free(mosq->host);
mosq->host = _mosquitto_strdup(host);
if(!mosq->host) return MOSQ_ERR_NOMEM;
mosq->port = port;
if(mosq->bind_address) _mosquitto_free(mosq->bind_address);
if(bind_address){
mosq->bind_address = _mosquitto_strdup(bind_address);
if(!mosq->bind_address) return MOSQ_ERR_NOMEM;
}
mosq->keepalive = keepalive;
if(_mosquitto_socketpair(&mosq->sockpairR, &mosq->sockpairW)){
_mosquitto_log_printf(mosq, MOSQ_LOG_WARNING,
"Warning: Unable to open socket pair, outgoing publish commands may be delayed.");
}
return MOSQ_ERR_SUCCESS;
}
int mosquitto_connect(struct mosquitto *mosq, const char *host, int port, int keepalive)
{
return mosquitto_connect_bind(mosq, host, port, keepalive, NULL);
}
int mosquitto_connect_bind(struct mosquitto *mosq, const char *host, int port, int keepalive, const char *bind_address)
{
int rc;
rc = _mosquitto_connect_init(mosq, host, port, keepalive, bind_address);
if(rc) return rc;
pthread_mutex_lock(&mosq->state_mutex);
mosq->state = mosq_cs_new;
pthread_mutex_unlock(&mosq->state_mutex);
return _mosquitto_reconnect(mosq, true);
}
int mosquitto_connect_async(struct mosquitto *mosq, const char *host, int port, int keepalive)
{
return mosquitto_connect_bind_async(mosq, host, port, keepalive, NULL);
}
int mosquitto_connect_bind_async(struct mosquitto *mosq, const char *host, int port, int keepalive, const char *bind_address)
{
int rc = _mosquitto_connect_init(mosq, host, port, keepalive, bind_address);
if(rc) return rc;
pthread_mutex_lock(&mosq->state_mutex);
mosq->state = mosq_cs_connect_async;
pthread_mutex_unlock(&mosq->state_mutex);
return _mosquitto_reconnect(mosq, false);
}
int mosquitto_reconnect_async(struct mosquitto *mosq)
{
return _mosquitto_reconnect(mosq, false);
}
int mosquitto_reconnect(struct mosquitto *mosq)
{
return _mosquitto_reconnect(mosq, true);
}
static int _mosquitto_reconnect(struct mosquitto *mosq, bool blocking)
{
int rc;
struct _mosquitto_packet *packet;
if(!mosq) return MOSQ_ERR_INVAL;
if(!mosq->host || mosq->port <= 0) return MOSQ_ERR_INVAL;
pthread_mutex_lock(&mosq->state_mutex);
#ifdef WITH_SOCKS
if(mosq->socks5_host){
mosq->state = mosq_cs_socks5_new;
}else
#endif
{
mosq->state = mosq_cs_new;
}
pthread_mutex_unlock(&mosq->state_mutex);
pthread_mutex_lock(&mosq->msgtime_mutex);
mosq->last_msg_in = mosquitto_time();
mosq->last_msg_out = mosquitto_time();
pthread_mutex_unlock(&mosq->msgtime_mutex);
mosq->ping_t = 0;
_mosquitto_packet_cleanup(&mosq->in_packet);
pthread_mutex_lock(&mosq->current_out_packet_mutex);
pthread_mutex_lock(&mosq->out_packet_mutex);
if(mosq->out_packet && !mosq->current_out_packet){
mosq->current_out_packet = mosq->out_packet;
mosq->out_packet = mosq->out_packet->next;
}
while(mosq->current_out_packet){
packet = mosq->current_out_packet;
/* Free data and reset values */
mosq->current_out_packet = mosq->out_packet;
if(mosq->out_packet){
mosq->out_packet = mosq->out_packet->next;
}
_mosquitto_packet_cleanup(packet);
_mosquitto_free(packet);
}
pthread_mutex_unlock(&mosq->out_packet_mutex);
pthread_mutex_unlock(&mosq->current_out_packet_mutex);
_mosquitto_messages_reconnect_reset(mosq);
#ifdef WITH_SOCKS
if(mosq->socks5_host){
rc = _mosquitto_socket_connect(mosq, mosq->socks5_host, mosq->socks5_port, mosq->bind_address, blocking);
}else
#endif
{
rc = _mosquitto_socket_connect(mosq, mosq->host, mosq->port, mosq->bind_address, blocking);
}
if(rc>0){
return rc;
}
#ifdef WITH_SOCKS
if(mosq->socks5_host){
return mosquitto__socks5_send(mosq);
}else
#endif
{
return _mosquitto_send_connect(mosq, mosq->keepalive, mosq->clean_session);
}
}
int mosquitto_disconnect(struct mosquitto *mosq)
{
if(!mosq) return MOSQ_ERR_INVAL;
pthread_mutex_lock(&mosq->state_mutex);
mosq->state = mosq_cs_disconnecting;
pthread_mutex_unlock(&mosq->state_mutex);
if(mosq->sock == INVALID_SOCKET) return MOSQ_ERR_NO_CONN;
return _mosquitto_send_disconnect(mosq);
}
int mosquitto_publish(struct mosquitto *mosq, int *mid, const char *topic, int payloadlen, const void *payload, int qos, bool retain)
{
struct mosquitto_message_all *message;
uint16_t local_mid;
if(!mosq || !topic || qos<0 || qos>2) return MOSQ_ERR_INVAL;
if(strlen(topic) == 0) return MOSQ_ERR_INVAL;
if(payloadlen < 0 || payloadlen > MQTT_MAX_PAYLOAD) return MOSQ_ERR_PAYLOAD_SIZE;
if(mosquitto_pub_topic_check(topic) != MOSQ_ERR_SUCCESS){
return MOSQ_ERR_INVAL;
}
local_mid = _mosquitto_mid_generate(mosq);
if(mid){
*mid = local_mid;
}
if(qos == 0){
return _mosquitto_send_publish(mosq, local_mid, topic, payloadlen, payload, qos, retain, false);
}else{
message = _mosquitto_calloc(1, sizeof(struct mosquitto_message_all));
if(!message) return MOSQ_ERR_NOMEM;
message->next = NULL;
message->timestamp = mosquitto_time();
message->msg.mid = local_mid;
message->msg.topic = _mosquitto_strdup(topic);
if(!message->msg.topic){
_mosquitto_message_cleanup(&message);
return MOSQ_ERR_NOMEM;
}
if(payloadlen){
message->msg.payloadlen = payloadlen;
message->msg.payload = _mosquitto_malloc(payloadlen*sizeof(uint8_t));
if(!message->msg.payload){
_mosquitto_message_cleanup(&message);
return MOSQ_ERR_NOMEM;
}
memcpy(message->msg.payload, payload, payloadlen*sizeof(uint8_t));
}else{
message->msg.payloadlen = 0;
message->msg.payload = NULL;
}
message->msg.qos = qos;
message->msg.retain = retain;
message->dup = false;
pthread_mutex_lock(&mosq->out_message_mutex);
_mosquitto_message_queue(mosq, message, mosq_md_out);
if(mosq->max_inflight_messages == 0 || mosq->inflight_messages < mosq->max_inflight_messages){
if(qos == 1){
message->state = mosq_ms_wait_for_puback;
}else if(qos == 2){
message->state = mosq_ms_wait_for_pubrec;
}
pthread_mutex_unlock(&mosq->out_message_mutex);
return _mosquitto_send_publish(mosq, message->msg.mid, message->msg.topic, message->msg.payloadlen, message->msg.payload, message->msg.qos, message->msg.retain, message->dup);
}else{
message->state = mosq_ms_invalid;
pthread_mutex_unlock(&mosq->out_message_mutex);
return MOSQ_ERR_SUCCESS;
}
}
}
int mosquitto_subscribe(struct mosquitto *mosq, int *mid, const char *sub, int qos)
{
if(!mosq) return MOSQ_ERR_INVAL;
if(mosq->sock == INVALID_SOCKET) return MOSQ_ERR_NO_CONN;
if(mosquitto_sub_topic_check(sub)) return MOSQ_ERR_INVAL;
return _mosquitto_send_subscribe(mosq, mid, sub, qos);
}
int mosquitto_unsubscribe(struct mosquitto *mosq, int *mid, const char *sub)
{
if(!mosq) return MOSQ_ERR_INVAL;
if(mosq->sock == INVALID_SOCKET) return MOSQ_ERR_NO_CONN;
if(mosquitto_sub_topic_check(sub)) return MOSQ_ERR_INVAL;
return _mosquitto_send_unsubscribe(mosq, mid, sub);
}
int mosquitto_tls_set(struct mosquitto *mosq, const char *cafile, const char *capath, const char *certfile, const char *keyfile, int (*pw_callback)(char *buf, int size, int rwflag, void *userdata))
{
#ifdef WITH_TLS
FILE *fptr;
if(!mosq || (!cafile && !capath) || (certfile && !keyfile) || (!certfile && keyfile)) return MOSQ_ERR_INVAL;
if(cafile){
fptr = _mosquitto_fopen(cafile, "rt");
if(fptr){
fclose(fptr);
}else{
return MOSQ_ERR_INVAL;
}
mosq->tls_cafile = _mosquitto_strdup(cafile);
if(!mosq->tls_cafile){
return MOSQ_ERR_NOMEM;
}
}else if(mosq->tls_cafile){
_mosquitto_free(mosq->tls_cafile);
mosq->tls_cafile = NULL;
}
if(capath){
mosq->tls_capath = _mosquitto_strdup(capath);
if(!mosq->tls_capath){
return MOSQ_ERR_NOMEM;
}
}else if(mosq->tls_capath){
_mosquitto_free(mosq->tls_capath);
mosq->tls_capath = NULL;
}
if(certfile){
fptr = _mosquitto_fopen(certfile, "rt");
if(fptr){
fclose(fptr);
}else{
if(mosq->tls_cafile){
_mosquitto_free(mosq->tls_cafile);
mosq->tls_cafile = NULL;
}
if(mosq->tls_capath){
_mosquitto_free(mosq->tls_capath);
mosq->tls_capath = NULL;
}
return MOSQ_ERR_INVAL;
}
mosq->tls_certfile = _mosquitto_strdup(certfile);
if(!mosq->tls_certfile){
return MOSQ_ERR_NOMEM;
}
}else{
if(mosq->tls_certfile) _mosquitto_free(mosq->tls_certfile);
mosq->tls_certfile = NULL;
}
if(keyfile){
fptr = _mosquitto_fopen(keyfile, "rt");
if(fptr){
fclose(fptr);
}else{
if(mosq->tls_cafile){
_mosquitto_free(mosq->tls_cafile);
mosq->tls_cafile = NULL;
}
if(mosq->tls_capath){
_mosquitto_free(mosq->tls_capath);
mosq->tls_capath = NULL;
}
if(mosq->tls_certfile){
_mosquitto_free(mosq->tls_certfile);
mosq->tls_certfile = NULL;
}
return MOSQ_ERR_INVAL;
}
mosq->tls_keyfile = _mosquitto_strdup(keyfile);
if(!mosq->tls_keyfile){
return MOSQ_ERR_NOMEM;
}
}else{
if(mosq->tls_keyfile) _mosquitto_free(mosq->tls_keyfile);
mosq->tls_keyfile = NULL;
}
mosq->tls_pw_callback = pw_callback;
return MOSQ_ERR_SUCCESS;
#else
return MOSQ_ERR_NOT_SUPPORTED;
#endif
}
int mosquitto_tls_opts_set(struct mosquitto *mosq, int cert_reqs, const char *tls_version, const char *ciphers)
{
#ifdef WITH_TLS
if(!mosq) return MOSQ_ERR_INVAL;
mosq->tls_cert_reqs = cert_reqs;
if(tls_version){
#if OPENSSL_VERSION_NUMBER >= 0x10001000L
if(!strcasecmp(tls_version, "tlsv1.2")
|| !strcasecmp(tls_version, "tlsv1.1")
|| !strcasecmp(tls_version, "tlsv1")){
mosq->tls_version = _mosquitto_strdup(tls_version);
if(!mosq->tls_version) return MOSQ_ERR_NOMEM;
}else{
return MOSQ_ERR_INVAL;
}
#else
if(!strcasecmp(tls_version, "tlsv1")){
mosq->tls_version = _mosquitto_strdup(tls_version);
if(!mosq->tls_version) return MOSQ_ERR_NOMEM;
}else{
return MOSQ_ERR_INVAL;
}
#endif
}else{
#if OPENSSL_VERSION_NUMBER >= 0x10001000L
mosq->tls_version = _mosquitto_strdup("tlsv1.2");
#else
mosq->tls_version = _mosquitto_strdup("tlsv1");
#endif
if(!mosq->tls_version) return MOSQ_ERR_NOMEM;
}
if(ciphers){
mosq->tls_ciphers = _mosquitto_strdup(ciphers);
if(!mosq->tls_ciphers) return MOSQ_ERR_NOMEM;
}else{
mosq->tls_ciphers = NULL;
}
return MOSQ_ERR_SUCCESS;
#else
return MOSQ_ERR_NOT_SUPPORTED;
#endif
}
int mosquitto_tls_insecure_set(struct mosquitto *mosq, bool value)
{
#ifdef WITH_TLS
if(!mosq) return MOSQ_ERR_INVAL;
mosq->tls_insecure = value;
return MOSQ_ERR_SUCCESS;
#else
return MOSQ_ERR_NOT_SUPPORTED;
#endif
}
int mosquitto_tls_psk_set(struct mosquitto *mosq, const char *psk, const char *identity, const char *ciphers)
{
#ifdef REAL_WITH_TLS_PSK
if(!mosq || !psk || !identity) return MOSQ_ERR_INVAL;
/* Check for hex only digits */
if(strspn(psk, "0123456789abcdefABCDEF") < strlen(psk)){
return MOSQ_ERR_INVAL;
}
mosq->tls_psk = _mosquitto_strdup(psk);
if(!mosq->tls_psk) return MOSQ_ERR_NOMEM;
mosq->tls_psk_identity = _mosquitto_strdup(identity);
if(!mosq->tls_psk_identity){
_mosquitto_free(mosq->tls_psk);
return MOSQ_ERR_NOMEM;
}
if(ciphers){
mosq->tls_ciphers = _mosquitto_strdup(ciphers);
if(!mosq->tls_ciphers) return MOSQ_ERR_NOMEM;
}else{
mosq->tls_ciphers = NULL;
}
return MOSQ_ERR_SUCCESS;
#else
return MOSQ_ERR_NOT_SUPPORTED;
#endif
}
int mosquitto_loop(struct mosquitto *mosq, int timeout, int max_packets)
{
#ifdef HAVE_PSELECT
struct timespec local_timeout;
#else
struct timeval local_timeout;
#endif
fd_set readfds, writefds;
int fdcount;
int rc;
char pairbuf;
int maxfd = 0;
if(!mosq || max_packets < 1) return MOSQ_ERR_INVAL;
#ifndef WIN32
if(mosq->sock >= FD_SETSIZE || mosq->sockpairR >= FD_SETSIZE){
return MOSQ_ERR_INVAL;
}
#endif
FD_ZERO(&readfds);
FD_ZERO(&writefds);
if(mosq->sock != INVALID_SOCKET){
maxfd = mosq->sock;
FD_SET(mosq->sock, &readfds);
pthread_mutex_lock(&mosq->current_out_packet_mutex);
pthread_mutex_lock(&mosq->out_packet_mutex);
if(mosq->out_packet || mosq->current_out_packet){
FD_SET(mosq->sock, &writefds);
}
#ifdef WITH_TLS
if(mosq->ssl){
if(mosq->want_write){
FD_SET(mosq->sock, &writefds);
mosq->want_write = false;
}else if(mosq->want_connect){
/* Remove possible FD_SET from above, we don't want to check
* for writing if we are still connecting, unless want_write is
* definitely set. The presence of outgoing packets does not
* matter yet. */
FD_CLR(mosq->sock, &writefds);
}
}
#endif
pthread_mutex_unlock(&mosq->out_packet_mutex);
pthread_mutex_unlock(&mosq->current_out_packet_mutex);
}else{
#ifdef WITH_SRV
if(mosq->achan){
pthread_mutex_lock(&mosq->state_mutex);
if(mosq->state == mosq_cs_connect_srv){
rc = ares_fds(mosq->achan, &readfds, &writefds);
if(rc > maxfd){
maxfd = rc;
}
}else{
pthread_mutex_unlock(&mosq->state_mutex);
return MOSQ_ERR_NO_CONN;
}
pthread_mutex_unlock(&mosq->state_mutex);
}
#else
return MOSQ_ERR_NO_CONN;
#endif
}
if(mosq->sockpairR != INVALID_SOCKET){
/* sockpairR is used to break out of select() before the timeout, on a
* call to publish() etc. */
FD_SET(mosq->sockpairR, &readfds);
if(mosq->sockpairR > maxfd){
maxfd = mosq->sockpairR;
}
}
if(timeout >= 0){
local_timeout.tv_sec = timeout/1000;
#ifdef HAVE_PSELECT
local_timeout.tv_nsec = (timeout-local_timeout.tv_sec*1000)*1e6;
#else
local_timeout.tv_usec = (timeout-local_timeout.tv_sec*1000)*1000;
#endif
}else{
local_timeout.tv_sec = 1;
#ifdef HAVE_PSELECT
local_timeout.tv_nsec = 0;
#else
local_timeout.tv_usec = 0;
#endif
}
#ifdef HAVE_PSELECT
fdcount = pselect(maxfd+1, &readfds, &writefds, NULL, &local_timeout, NULL);
#else
fdcount = select(maxfd+1, &readfds, &writefds, NULL, &local_timeout);
#endif
if(fdcount == -1){
#ifdef WIN32
errno = WSAGetLastError();
#endif
if(errno == EINTR){
return MOSQ_ERR_SUCCESS;
}else{
return MOSQ_ERR_ERRNO;
}
}else{
if(mosq->sock != INVALID_SOCKET){
if(FD_ISSET(mosq->sock, &readfds)){
#ifdef WITH_TLS
if(mosq->want_connect){
rc = mosquitto__socket_connect_tls(mosq);
if(rc) return rc;
}else
#endif
{
do{
rc = mosquitto_loop_read(mosq, max_packets);
if(rc || mosq->sock == INVALID_SOCKET){
return rc;
}
}while(SSL_DATA_PENDING(mosq));
}
}
if(mosq->sockpairR != INVALID_SOCKET && FD_ISSET(mosq->sockpairR, &readfds)){
#ifndef WIN32
if(read(mosq->sockpairR, &pairbuf, 1) == 0){
}
#else
recv(mosq->sockpairR, &pairbuf, 1, 0);
#endif
/* Fake write possible, to stimulate output write even though
* we didn't ask for it, because at that point the publish or
* other command wasn't present. */
FD_SET(mosq->sock, &writefds);
}
if(FD_ISSET(mosq->sock, &writefds)){
#ifdef WITH_TLS
if(mosq->want_connect){
rc = mosquitto__socket_connect_tls(mosq);
if(rc) return rc;
}else
#endif
{
rc = mosquitto_loop_write(mosq, max_packets);
if(rc || mosq->sock == INVALID_SOCKET){
return rc;
}
}
}
}
#ifdef WITH_SRV
if(mosq->achan){
ares_process(mosq->achan, &readfds, &writefds);
}
#endif
}
return mosquitto_loop_misc(mosq);
}
int mosquitto_loop_forever(struct mosquitto *mosq, int timeout, int max_packets)
{
int run = 1;
int rc;
unsigned int reconnects = 0;
unsigned long reconnect_delay;
if(!mosq) return MOSQ_ERR_INVAL;
if(mosq->state == mosq_cs_connect_async){
mosquitto_reconnect(mosq);
}
while(run){
do{
rc = mosquitto_loop(mosq, timeout, max_packets);
if (reconnects !=0 && rc == MOSQ_ERR_SUCCESS){
reconnects = 0;
}
}while(run && rc == MOSQ_ERR_SUCCESS);
/* Quit after fatal errors. */