int mosquitto_main_loop(struct mosquitto_db *db, int *listensock, int listensock_count, int listener_max)
{
time_t start_time = time(NULL);
time_t last_backup = time(NULL);
time_t last_store_clean = time(NULL);
time_t now;
int fdcount;
#ifndef WIN32
sigset_t sigblock, origsig;
#endif
int i;
struct pollfd *pollfds = NULL;
int pollfd_count = 0;
int pollfd_index;
#ifndef WIN32
sigemptyset(&sigblock);
sigaddset(&sigblock, SIGINT);
#endif
while(run){
mqtt3_db_sys_update(db, db->config->sys_interval, start_time);
if(listensock_count + db->context_count > pollfd_count){
pollfd_count = listensock_count + db->context_count;
pollfds = _mosquitto_realloc(pollfds, sizeof(struct pollfd)*pollfd_count);
if(!pollfds){
_mosquitto_log_printf(NULL, MOSQ_LOG_ERR, "Error: Out of memory.");
return MOSQ_ERR_NOMEM;
}
}
memset(pollfds, -1, sizeof(struct pollfd)*pollfd_count);
pollfd_index = 0;
for(i=0; i<listensock_count; i++){
pollfds[pollfd_index].fd = listensock[i];
pollfds[pollfd_index].events = POLLIN;
pollfds[pollfd_index].revents = 0;
pollfd_index++;
}
now = time(NULL);
for(i=0; i<db->context_count; i++){
if(db->contexts[i]){
db->contexts[i]->pollfd_index = -1;
if(db->contexts[i]->sock != INVALID_SOCKET){
#ifdef WITH_BRIDGE
if(db->contexts[i]->bridge){
_mosquitto_check_keepalive(db->contexts[i]);
}
#endif
/* Local bridges never time out in this fashion. */
if(!(db->contexts[i]->keepalive) || db->contexts[i]->bridge || now - db->contexts[i]->last_msg_in < (time_t)(db->contexts[i]->keepalive)*3/2){
if(mqtt3_db_message_write(db->contexts[i]) == MOSQ_ERR_SUCCESS){
pollfds[pollfd_index].fd = db->contexts[i]->sock;
pollfds[pollfd_index].events = POLLIN | POLLRDHUP;
pollfds[pollfd_index].revents = 0;
if(db->contexts[i]->out_packet){
pollfds[pollfd_index].events |= POLLOUT;
}
db->contexts[i]->pollfd_index = pollfd_index;
pollfd_index++;
}else{
mqtt3_context_disconnect(db, db->contexts[i]);
}
}else{
if(db->config->connection_messages == true){
_mosquitto_log_printf(NULL, MOSQ_LOG_NOTICE, "Client %s has exceeded timeout, disconnecting.", db->contexts[i]->id);
}
/* Client has exceeded keepalive*1.5 */
mqtt3_context_disconnect(db, db->contexts[i]);
}
}else{
#ifdef WITH_BRIDGE
if(db->contexts[i]->bridge){
/* Want to try to restart the bridge connection */
if(!db->contexts[i]->bridge->restart_t){
db->contexts[i]->bridge->restart_t = time(NULL)+db->contexts[i]->bridge->restart_timeout;
}else{
if(db->contexts[i]->bridge->start_type == bst_automatic && time(NULL) > db->contexts[i]->bridge->restart_t){
db->contexts[i]->bridge->restart_t = 0;
if(mqtt3_bridge_connect(db, db->contexts[i]) == MOSQ_ERR_SUCCESS){
pollfds[pollfd_index].fd = db->contexts[i]->sock;
pollfds[pollfd_index].events = POLLIN | POLLRDHUP;
pollfds[pollfd_index].revents = 0;
if(db->contexts[i]->out_packet){
pollfds[pollfd_index].events |= POLLOUT;
}
db->contexts[i]->pollfd_index = pollfd_index;
pollfd_index++;
}else{
/* Retry later. */
db->contexts[i]->bridge->restart_t = time(NULL)+db->contexts[i]->bridge->restart_timeout;
}
}
}
}else{
#endif
if(db->contexts[i]->clean_session == true){
mqtt3_context_cleanup(db, db->contexts[i], true);
db->contexts[i] = NULL;
}else if(db->config->persistent_client_expiration > 0){
/* This is a persistent client, check to see if the
* last time it connected was longer than
* persistent_client_expiration seconds ago. If so,
* expire it and clean up.
*/
if(time(NULL) > db->contexts[i]->disconnect_t+db->config->persistent_client_expiration){
_mosquitto_log_printf(NULL, MOSQ_LOG_NOTICE, "Expiring persistent client %s due to timeout.", db->contexts[i]->id);
g_clients_expired++;
db->contexts[i]->clean_session = true;
mqtt3_context_cleanup(db, db->contexts[i], true);
db->contexts[i] = NULL;
}
}
#ifdef WITH_BRIDGE
}
#endif
}
}
}
mqtt3_db_message_timeout_check(db, db->config->retry_interval);
#ifndef WIN32
sigprocmask(SIG_SETMASK, &sigblock, &origsig);
fdcount = poll(pollfds, pollfd_index, 100);
sigprocmask(SIG_SETMASK, &origsig, NULL);
#else
fdcount = WSAPoll(pollfds, pollfd_index, 100);
#endif
if(fdcount == -1){
loop_handle_errors(db, pollfds);
}else{
loop_handle_reads_writes(db, pollfds);
for(i=0; i<listensock_count; i++){
if(pollfds[i].revents & (POLLIN | POLLPRI)){
while(mqtt3_socket_accept(db, listensock[i]) != -1){
}
}
}
}
#ifdef WITH_PERSISTENCE
if(db->config->persistence && db->config->autosave_interval){
if(db->config->autosave_on_changes){
if(db->persistence_changes > db->config->autosave_interval){
mqtt3_db_backup(db, false, false);
db->persistence_changes = 0;
}
}else{
if(last_backup + db->config->autosave_interval < now){
mqtt3_db_backup(db, false, false);
last_backup = time(NULL);
}
}
}
#endif
if(!db->config->store_clean_interval || last_store_clean + db->config->store_clean_interval < now){
mqtt3_db_store_clean(db);
last_store_clean = time(NULL);
}
#ifdef WITH_PERSISTENCE
if(flag_db_backup){
mqtt3_db_backup(db, false, false);
flag_db_backup = false;
}
#endif
if(flag_reload){
_mosquitto_log_printf(NULL, MOSQ_LOG_INFO, "Reloading config.");
mqtt3_config_read(db->config, true);
mosquitto_security_cleanup(db, true);
mosquitto_security_init(db, true);
mosquitto_security_apply(db);
mqtt3_log_init(db->config->log_type, db->config->log_dest);
flag_reload = false;
}
if(flag_tree_print){
mqtt3_sub_tree_print(&db->subs, 0);
flag_tree_print = false;
}
}
if(pollfds) _mosquitto_free(pollfds);
return MOSQ_ERR_SUCCESS;
}
int mosquitto_main_loop(struct mosquitto_db *db, int *listensock, int listensock_count, int listener_max)
{
time_t start_time = time(NULL);
time_t last_backup = time(NULL);
time_t last_store_clean = time(NULL);
time_t now;
sigset_t sigblock, origsig;
int i, s; /* temp variables */
struct epoll_event* events = NULL;
int epollfd_count = 0;
int epollfd_index;
int efd; /* epoll fd */
while (run) {
mqtt3_db_sys_update(db, db->config->sys_interval, start_time);
events = init_events(events, listensock_count, db->context_count, &epollfd_count);
if (!events) {
_mosquitto_log_printf (NULL, MOSQ_LOG_ERR, "Error: Out of memory.");
return MOSQ_ERR_NOMEM;
}
memset(events, -1, sizeof(struct epoll_event) * epollfd_count);
epollfd_index = 0;
efd = create_event(events, listensock, listensock_count, &epollfd_index);
now = time (NULL);
reg_context_events(db, events, &epollfd_index, efd, now);
mqtt3_db_message_timeout_check(db, db->config->retry_interval);
sigprocmask(SIG_SETMASK, &sigblock, &origsig);
s = epoll_wait(efd, events, 64, -1);
if (s == -1) {
printf("errno value: %d, it means: %s", errno, strerror(errno));
loop_handle_errors(db, events, efd);
}
if (s == -1) {
printf("errno value: %d, it means: %s", errno, strerror(errno));
loop_handle_errors(db, events, efd);
} else{
loop_handle_reads_writes(db, events, efd);
for(i=0; i<listensock_count; i++){
if(events[i].events & (EPOLLIN | EPOLLPRI)){
while((s = mqtt3_socket_accept(db, listensock[i], &events[i], efd)) != -1){
}
}
}
}
sigprocmask(SIG_SETMASK, &origsig, NULL);
#ifdef WITH_PERSISTENCE
if(db->config->persistence && db->config->autosave_interval){
if(db->config->autosave_on_changes){
if(db->persistence_changes > db->config->autosave_interval){
mqtt3_db_backup(db, false, false);
db->persistence_changes = 0;
}
}else{
if(last_backup + db->config->autosave_interval < now){
mqtt3_db_backup(db, false, false);
last_backup = time(NULL);
}
}
}
#endif
if(!db->config->store_clean_interval || last_store_clean + db->config->store_clean_interval < now){
mqtt3_db_store_clean(db);
last_store_clean = time(NULL);
}
#ifdef WITH_PERSISTENCE
if(flag_db_backup){
mqtt3_db_backup(db, false, false);
flag_db_backup = false;
}
#endif
if(flag_reload){
_mosquitto_log_printf(NULL, MOSQ_LOG_INFO, "Reloading config.");
mqtt3_config_read(db->config, true);
mosquitto_security_cleanup(db, true);
mosquitto_security_init(db, true);
mosquitto_security_apply(db);
mqtt3_log_init(db->config->log_type, db->config->log_dest);
flag_reload = false;
}
if(flag_tree_print){
mqtt3_sub_tree_print(&db->subs, 0);
flag_tree_print = false;
}
}
if(events) _mosquitto_free(events);
return MOSQ_ERR_SUCCESS;
}
int main(int argc, char *argv[])
{
int *listensock = NULL;
int listensock_count = 0;
int listensock_index = 0;
struct mqtt3_config config;
char buf[1024];
int i, j;
FILE *pid;
int listener_max;
int rc;
char err[256];
#ifdef WIN32
SYSTEMTIME st;
#else
struct timeval tv;
#endif
#if defined(WIN32) || defined(__CYGWIN__)
if(argc == 2){
if(!strcmp(argv[1], "run")){
service_run();
return 0;
}else if(!strcmp(argv[1], "install")){
service_install();
return 0;
}else if(!strcmp(argv[1], "uninstall")){
service_uninstall();
return 0;
}
}
#endif
#ifdef WIN32
GetSystemTime(&st);
srand(st.wSecond + st.wMilliseconds);
#else
gettimeofday(&tv, NULL);
srand(tv.tv_sec + tv.tv_usec);
#endif
memset(&int_db, 0, sizeof(struct mosquitto_db));
_mosquitto_net_init();
mqtt3_config_init(&config);
rc = mqtt3_config_parse_args(&config, argc, argv);
if(rc != MOSQ_ERR_SUCCESS) return rc;
int_db.config = &config;
if(config.daemon){
#ifndef WIN32
switch(fork()){
case 0:
break;
case -1:
strerror_r(errno, err, 256);
_mosquitto_log_printf(NULL, MOSQ_LOG_ERR, "Error in fork: %s", err);
return 1;
default:
return MOSQ_ERR_SUCCESS;
}
#else
_mosquitto_log_printf(NULL, MOSQ_LOG_WARNING, "Warning: Can't start in daemon mode in Windows.");
#endif
}
if(config.daemon && config.pid_file){
pid = _mosquitto_fopen(config.pid_file, "wt");
if(pid){
fprintf(pid, "%d", getpid());
fclose(pid);
}else{
_mosquitto_log_printf(NULL, MOSQ_LOG_ERR, "Error: Unable to write pid file.");
return 1;
}
}
rc = drop_privileges(&config);
if(rc != MOSQ_ERR_SUCCESS) return rc;
rc = mqtt3_db_open(&config, &int_db);
if(rc != MOSQ_ERR_SUCCESS){
_mosquitto_log_printf(NULL, MOSQ_LOG_ERR, "Error: Couldn't open database.");
return rc;
}
/* Initialise logging only after initialising the database in case we're
* logging to topics */
mqtt3_log_init(config.log_type, config.log_dest);
_mosquitto_log_printf(NULL, MOSQ_LOG_INFO, "mosquitto version %s (build date %s) starting", VERSION, TIMESTAMP);
if(config.config_file){
_mosquitto_log_printf(NULL, MOSQ_LOG_INFO, "Config loaded from %s.", config.config_file);
}else{
_mosquitto_log_printf(NULL, MOSQ_LOG_INFO, "Using default config.");
}
rc = mosquitto_security_module_init(&int_db);
if(rc) return rc;
rc = mosquitto_security_init(&int_db, false);
if(rc) return rc;
#ifdef WITH_SYS_TREE
if(config.sys_interval > 0){
/* Set static $SYS messages */
snprintf(buf, 1024, "mosquitto version %s", VERSION);
mqtt3_db_messages_easy_queue(&int_db, NULL, "$SYS/broker/version", 2, strlen(buf), buf, 1);
snprintf(buf, 1024, "%s", TIMESTAMP);
mqtt3_db_messages_easy_queue(&int_db, NULL, "$SYS/broker/timestamp", 2, strlen(buf), buf, 1);
#ifdef CHANGESET
snprintf(buf, 1024, "%s", CHANGESET);
mqtt3_db_messages_easy_queue(&int_db, NULL, "$SYS/broker/changeset", 2, strlen(buf), buf, 1);
#endif
}
#endif
listener_max = -1;
listensock_index = 0;
for(i=0; i<config.listener_count; i++){
if(mqtt3_socket_listen(&config.listeners[i])){
_mosquitto_free(int_db.contexts);
mqtt3_db_close(&int_db);
if(config.pid_file){
remove(config.pid_file);
}
return 1;
}
listensock_count += config.listeners[i].sock_count;
listensock = _mosquitto_realloc(listensock, sizeof(int)*listensock_count);
if(!listensock){
_mosquitto_free(int_db.contexts);
mqtt3_db_close(&int_db);
if(config.pid_file){
remove(config.pid_file);
}
return 1;
}
for(j=0; j<config.listeners[i].sock_count; j++){
if(config.listeners[i].socks[j] == INVALID_SOCKET){
_mosquitto_free(int_db.contexts);
mqtt3_db_close(&int_db);
if(config.pid_file){
remove(config.pid_file);
}
return 1;
}
listensock[listensock_index] = config.listeners[i].socks[j];
if(listensock[listensock_index] > listener_max){
listener_max = listensock[listensock_index];
}
listensock_index++;
}
}
signal(SIGINT, handle_sigint);
signal(SIGTERM, handle_sigint);
#ifdef SIGHUP
signal(SIGHUP, handle_sighup);
#endif
#ifndef WIN32
signal(SIGUSR1, handle_sigusr1);
signal(SIGUSR2, handle_sigusr2);
signal(SIGPIPE, SIG_IGN);
#endif
#ifdef WITH_BRIDGE
for(i=0; i<config.bridge_count; i++){
if(mqtt3_bridge_new(&int_db, &(config.bridges[i]))){
_mosquitto_log_printf(NULL, MOSQ_LOG_WARNING, "Warning: Unable to connect to bridge %s.",
config.bridges[i].name);
}
}
#endif
run = 1;
rc = mosquitto_main_loop(&int_db, listensock, listensock_count, listener_max);
_mosquitto_log_printf(NULL, MOSQ_LOG_INFO, "mosquitto version %s terminating", VERSION);
mqtt3_log_close();
#ifdef WITH_PERSISTENCE
if(config.persistence){
mqtt3_db_backup(&int_db, true, true);
}
#endif
for(i=0; i<int_db.context_count; i++){
if(int_db.contexts[i]){
mqtt3_context_cleanup(&int_db, int_db.contexts[i], true);
}
}
_mosquitto_free(int_db.contexts);
int_db.contexts = NULL;
mqtt3_db_close(&int_db);
if(listensock){
for(i=0; i<listensock_count; i++){
if(listensock[i] != INVALID_SOCKET){
#ifndef WIN32
close(listensock[i]);
#else
closesocket(listensock[i]);
#endif
}
}
_mosquitto_free(listensock);
}
mosquitto_security_module_cleanup(&int_db);
if(config.pid_file){
remove(config.pid_file);
}
_mosquitto_net_cleanup();
mqtt3_config_cleanup(int_db.config);
return rc;
}