static void create_bridge_events(
struct mosquitto_db* db,
struct epoll_event* events,
int* epollfd_index,
int efd,
int i)
{
/* 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){
nonblocking (db->contexts[i]->sock);
events[*epollfd_index].data.fd = db->contexts[i]->sock;
events[*epollfd_index].events = EPOLLIN | POLLRDHUP;
if(db->contexts[i]->out_packet){
events[*epollfd_index].events |= EPOLLOUT;
}
epoll_ctl (efd, EPOLL_CTL_ADD, db->contexts[i]->sock, &events[*epollfd_index]);
db->contexts[i]->pollfd_index = *epollfd_index;
*epollfd_index = *epollfd_index + 1;
} else {
/* Retry later. */
db->contexts[i]->bridge->restart_t = time(NULL)+db->contexts[i]->bridge->restart_timeout;
}
}
}
}
int mqtt3_bridge_new(mosquitto_db *db, struct _mqtt3_bridge *bridge)
{
int i;
mqtt3_context *new_context = NULL;
mqtt3_context **tmp_contexts;
assert(db);
assert(bridge);
new_context = mqtt3_context_init(-1);
if(!new_context){
return MOSQ_ERR_NOMEM;
}
new_context->bridge = bridge;
for(i=0; i<db->context_count; i++){
if(db->contexts[i] == NULL){
db->contexts[i] = new_context;
break;
}
}
if(i==db->context_count){
db->context_count++;
tmp_contexts = _mosquitto_realloc(db->contexts, sizeof(mqtt3_context*)*db->context_count);
if(tmp_contexts){
db->contexts = tmp_contexts;
db->contexts[db->context_count-1] = new_context;
}else{
return MOSQ_ERR_NOMEM;
}
}
/* FIXME - need to check that this name isn't already in use. */
new_context->core.id = _mosquitto_strdup(bridge->name);
if(!new_context->core.id){
return MOSQ_ERR_NOMEM;
}
new_context->core.username = new_context->bridge->username;
new_context->core.password = new_context->bridge->password;
return mqtt3_bridge_connect(db, new_context);
}
int mqtt3_bridge_new(struct mosquitto_db *db, struct _mqtt3_bridge *bridge)
{
struct mosquitto *new_context = NULL;
struct mosquitto **bridges;
char hostname[256];
int len;
char *id, *local_id;
assert(db);
assert(bridge);
if(!bridge->remote_clientid){
if(!gethostname(hostname, 256)){
len = strlen(hostname) + strlen(bridge->name) + 2;
id = _mosquitto_malloc(len);
if(!id){
return MOSQ_ERR_NOMEM;
}
snprintf(id, len, "%s.%s", hostname, bridge->name);
}else{
return 1;
}
bridge->remote_clientid = id;
}
if(bridge->local_clientid){
local_id = _mosquitto_strdup(bridge->local_clientid);
if(!local_id){
return MOSQ_ERR_NOMEM;
}
}else{
len = strlen(bridge->remote_clientid) + strlen("local.") + 2;
local_id = _mosquitto_malloc(len);
if(!local_id){
return MOSQ_ERR_NOMEM;
}
snprintf(local_id, len, "local.%s", bridge->remote_clientid);
bridge->local_clientid = _mosquitto_strdup(local_id);
if(!bridge->local_clientid){
_mosquitto_free(local_id);
return MOSQ_ERR_NOMEM;
}
}
HASH_FIND(hh_id, db->contexts_by_id, local_id, strlen(local_id), new_context);
if(new_context){
/* (possible from persistent db) */
_mosquitto_free(local_id);
}else{
/* id wasn't found, so generate a new context */
new_context = mqtt3_context_init(db, -1);
if(!new_context){
_mosquitto_free(local_id);
return MOSQ_ERR_NOMEM;
}
new_context->id = local_id;
HASH_ADD_KEYPTR(hh_id, db->contexts_by_id, new_context->id, strlen(new_context->id), new_context);
}
new_context->bridge = bridge;
new_context->is_bridge = true;
new_context->username = new_context->bridge->remote_username;
new_context->password = new_context->bridge->remote_password;
#ifdef WITH_TLS
new_context->tls_cafile = new_context->bridge->tls_cafile;
new_context->tls_capath = new_context->bridge->tls_capath;
new_context->tls_certfile = new_context->bridge->tls_certfile;
new_context->tls_keyfile = new_context->bridge->tls_keyfile;
new_context->tls_cert_reqs = SSL_VERIFY_PEER;
new_context->tls_version = new_context->bridge->tls_version;
new_context->tls_insecure = new_context->bridge->tls_insecure;
#ifdef REAL_WITH_TLS_PSK
new_context->tls_psk_identity = new_context->bridge->tls_psk_identity;
new_context->tls_psk = new_context->bridge->tls_psk;
#endif
#endif
bridge->try_private_accepted = true;
new_context->protocol = bridge->protocol_version;
bridges = _mosquitto_realloc(db->bridges, (db->bridge_count+1)*sizeof(struct mosquitto *));
if(bridges){
db->bridges = bridges;
db->bridge_count++;
db->bridges[db->bridge_count-1] = new_context;
}else{
return MOSQ_ERR_NOMEM;
}
return mqtt3_bridge_connect(db, new_context);
}
int mqtt3_bridge_new(struct mosquitto_db *db, struct _mqtt3_bridge *bridge)
{
int i;
struct mosquitto *new_context = NULL;
int null_index = -1;
struct mosquitto **tmp_contexts;
char hostname[256];
int len;
char *id;
assert(db);
assert(bridge);
if(bridge->clientid){
id = _mosquitto_strdup(bridge->clientid);
}else{
if(!gethostname(hostname, 256)){
len = strlen(hostname) + strlen(bridge->name) + 2;
id = _mosquitto_malloc(len);
if(!id){
return MOSQ_ERR_NOMEM;
}
snprintf(id, len, "%s.%s", hostname, bridge->name);
}else{
return 1;
}
}
if(!id){
return MOSQ_ERR_NOMEM;
}
/* Search for existing id (possible from persistent db) and also look for a
* gap in the db->contexts[] array in case the id isn't found. */
for(i=0; i<db->context_count; i++){
if(db->contexts[i]){
if(!strcmp(db->contexts[i]->id, id)){
new_context = db->contexts[i];
break;
}
}else if(db->contexts[i] == NULL && null_index == -1){
null_index = i;
break;
}
}
if(!new_context){
/* id wasn't found, so generate a new context */
new_context = mqtt3_context_init(-1);
if(!new_context){
return MOSQ_ERR_NOMEM;
}
if(null_index == -1){
/* There were no gaps in the db->contexts[] array, so need to append. */
db->context_count++;
tmp_contexts = _mosquitto_realloc(db->contexts, sizeof(struct mosquitto*)*db->context_count);
if(tmp_contexts){
db->contexts = tmp_contexts;
db->contexts[db->context_count-1] = new_context;
}else{
_mosquitto_free(new_context);
return MOSQ_ERR_NOMEM;
}
}else{
db->contexts[null_index] = new_context;
}
new_context->id = id;
}else{
/* id was found, so context->id already in memory. */
_mosquitto_free(id);
}
new_context->bridge = bridge;
new_context->is_bridge = true;
new_context->username = new_context->bridge->username;
new_context->password = new_context->bridge->password;
#ifdef WITH_TLS
new_context->tls_cafile = new_context->bridge->tls_cafile;
new_context->tls_capath = new_context->bridge->tls_capath;
new_context->tls_certfile = new_context->bridge->tls_certfile;
new_context->tls_keyfile = new_context->bridge->tls_keyfile;
new_context->tls_cert_reqs = SSL_VERIFY_PEER;
new_context->tls_version = new_context->bridge->tls_version;
new_context->tls_insecure = new_context->bridge->tls_insecure;
#ifdef REAL_WITH_TLS_PSK
new_context->tls_psk_identity = new_context->bridge->tls_psk_identity;
new_context->tls_psk = new_context->bridge->tls_psk;
#endif
#endif
bridge->try_private_accepted = true;
return mqtt3_bridge_connect(db, new_context);
}
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;
}