int mosquitto_loop_read(struct mosquitto *mosq, int max_packets)
{
int rc;
int i;
if(max_packets < 1) return MOSQ_ERR_INVAL;
pthread_mutex_lock(&mosq->out_message_mutex);
max_packets = mosq->out_queue_len;
pthread_mutex_unlock(&mosq->out_message_mutex);
pthread_mutex_lock(&mosq->in_message_mutex);
max_packets += mosq->in_queue_len;
pthread_mutex_unlock(&mosq->in_message_mutex);
if(max_packets < 1) max_packets = 1;
/* Queue len here tells us how many messages are awaiting processing and
* have QoS > 0. We should try to deal with that many in this loop in order
* to keep up. */
for(i=0; i<max_packets; i++){
#ifdef WITH_SOCKS
if(mosq->socks5_host){
rc = mosquitto__socks5_read(mosq);
}else
#endif
{
rc = _mosquitto_packet_read(mosq);
}
if(rc || errno == EAGAIN || errno == COMPAT_EWOULDBLOCK){
return _mosquitto_loop_rc_handle(mosq, rc);
}
}
return rc;
}
static void loop_handle_reads_writes(struct mosquitto_db *db, struct pollfd *pollfds)
{
int i;
for(i=0; i<db->context_count; i++){
if(db->contexts[i] && db->contexts[i]->sock != INVALID_SOCKET){
assert(pollfds[db->contexts[i]->pollfd_index].fd == db->contexts[i]->sock);
#ifdef WITH_TLS
if(pollfds[db->contexts[i]->pollfd_index].revents & POLLOUT ||
db->contexts[i]->want_write ||
(db->contexts[i]->ssl && db->contexts[i]->state == mosq_cs_new)){
#else
if(pollfds[db->contexts[i]->pollfd_index].revents & POLLOUT){
#endif
if(_mosquitto_packet_write(db->contexts[i])){
if(db->config->connection_messages == true){
if(db->contexts[i]->state != mosq_cs_disconnecting){
_mosquitto_log_printf(NULL, MOSQ_LOG_NOTICE, "Socket write error on client %s, disconnecting.", db->contexts[i]->id);
}else{
_mosquitto_log_printf(NULL, MOSQ_LOG_NOTICE, "Client %s disconnected.", db->contexts[i]->id);
}
}
/* Write error or other that means we should disconnect */
mqtt3_context_disconnect(db, db->contexts[i]);
}
}
}
if(db->contexts[i] && db->contexts[i]->sock != INVALID_SOCKET){
assert(pollfds[db->contexts[i]->pollfd_index].fd == db->contexts[i]->sock);
#ifdef WITH_TLS
if(pollfds[db->contexts[i]->pollfd_index].revents & POLLIN ||
db->contexts[i]->want_read ||
(db->contexts[i]->ssl && db->contexts[i]->state == mosq_cs_new)){
#else
if(pollfds[db->contexts[i]->pollfd_index].revents & POLLIN){
#endif
if(_mosquitto_packet_read(db, db->contexts[i])){
if(db->config->connection_messages == true){
if(db->contexts[i]->state != mosq_cs_disconnecting){
_mosquitto_log_printf(NULL, MOSQ_LOG_NOTICE, "Socket read error on client %s, disconnecting.", db->contexts[i]->id);
}else{
_mosquitto_log_printf(NULL, MOSQ_LOG_NOTICE, "Client %s disconnected.", db->contexts[i]->id);
}
}
/* Read error or other that means we should disconnect */
mqtt3_context_disconnect(db, db->contexts[i]);
}
}
}
if(db->contexts[i] && db->contexts[i]->sock != INVALID_SOCKET){
if(pollfds[db->contexts[i]->pollfd_index].revents & (POLLHUP | POLLRDHUP | POLLERR | POLLNVAL)){
do_disconnect(db, i);
}
}
}
}
int mosquitto_loop_read(struct mosquitto *mosq, int max_packets)
{
int rc;
int i;
if(max_packets < 1) return MOSQ_ERR_INVAL;
max_packets = mosq->queue_len;
if(max_packets < 1) max_packets = 1;
/* Queue len here tells us how many messages are awaiting processing and
* have QoS > 0. We should try to deal with that many in this loop in order
* to keep up. */
for(i=0; i<max_packets; i++) {
rc = _mosquitto_packet_read(mosq);
if(rc || errno == EAGAIN || errno == COMPAT_EWOULDBLOCK) {
return _mosquitto_loop_rc_handle(mosq, rc);
}
}
return rc;
}
int mosquitto__socks5_read(struct mosquitto *mosq)
{
ssize_t len;
uint8_t *payload;
uint8_t i;
if(mosq->state == mosq_cs_socks5_start){
while(mosq->in_packet.to_process > 0){
len = _mosquitto_net_read(mosq, &(mosq->in_packet.payload[mosq->in_packet.pos]), mosq->in_packet.to_process);
if(len > 0){
mosq->in_packet.pos += len;
mosq->in_packet.to_process -= len;
}else{
#ifdef WIN32
errno = WSAGetLastError();
#endif
if(errno == EAGAIN || errno == COMPAT_EWOULDBLOCK){
return MOSQ_ERR_SUCCESS;
}else{
_mosquitto_packet_cleanup(&mosq->in_packet);
switch(errno){
case 0:
return MOSQ_ERR_PROXY;
case COMPAT_ECONNRESET:
return MOSQ_ERR_CONN_LOST;
default:
return MOSQ_ERR_ERRNO;
}
}
}
}
if(mosq->in_packet.payload[0] != 5){
_mosquitto_packet_cleanup(&mosq->in_packet);
return MOSQ_ERR_PROXY;
}
switch(mosq->in_packet.payload[1]){
case SOCKS_AUTH_NONE:
_mosquitto_packet_cleanup(&mosq->in_packet);
mosq->state = mosq_cs_socks5_auth_ok;
return mosquitto__socks5_send(mosq);
case SOCKS_AUTH_USERPASS:
_mosquitto_packet_cleanup(&mosq->in_packet);
mosq->state = mosq_cs_socks5_send_userpass;
return mosquitto__socks5_send(mosq);
default:
_mosquitto_packet_cleanup(&mosq->in_packet);
return MOSQ_ERR_AUTH;
}
}else if(mosq->state == mosq_cs_socks5_userpass_reply){
while(mosq->in_packet.to_process > 0){
len = _mosquitto_net_read(mosq, &(mosq->in_packet.payload[mosq->in_packet.pos]), mosq->in_packet.to_process);
if(len > 0){
mosq->in_packet.pos += len;
mosq->in_packet.to_process -= len;
}else{
#ifdef WIN32
errno = WSAGetLastError();
#endif
if(errno == EAGAIN || errno == COMPAT_EWOULDBLOCK){
return MOSQ_ERR_SUCCESS;
}else{
_mosquitto_packet_cleanup(&mosq->in_packet);
switch(errno){
case 0:
return MOSQ_ERR_PROXY;
case COMPAT_ECONNRESET:
return MOSQ_ERR_CONN_LOST;
default:
return MOSQ_ERR_ERRNO;
}
}
}
}
if(mosq->in_packet.payload[0] != 1){
_mosquitto_packet_cleanup(&mosq->in_packet);
return MOSQ_ERR_PROXY;
}
if(mosq->in_packet.payload[1] == 0){
_mosquitto_packet_cleanup(&mosq->in_packet);
mosq->state = mosq_cs_socks5_auth_ok;
return mosquitto__socks5_send(mosq);
}else{
i = mosq->in_packet.payload[1];
_mosquitto_packet_cleanup(&mosq->in_packet);
switch(i){
case SOCKS_REPLY_CONNECTION_NOT_ALLOWED:
return MOSQ_ERR_AUTH;
case SOCKS_REPLY_NETWORK_UNREACHABLE:
case SOCKS_REPLY_HOST_UNREACHABLE:
case SOCKS_REPLY_CONNECTION_REFUSED:
return MOSQ_ERR_NO_CONN;
case SOCKS_REPLY_GENERAL_FAILURE:
case SOCKS_REPLY_TTL_EXPIRED:
case SOCKS_REPLY_COMMAND_NOT_SUPPORTED:
case SOCKS_REPLY_ADDRESS_TYPE_NOT_SUPPORTED:
return MOSQ_ERR_PROXY;
default:
return MOSQ_ERR_INVAL;
}
return MOSQ_ERR_PROXY;
}
}else if(mosq->state == mosq_cs_socks5_request){
while(mosq->in_packet.to_process > 0){
len = _mosquitto_net_read(mosq, &(mosq->in_packet.payload[mosq->in_packet.pos]), mosq->in_packet.to_process);
if(len > 0){
mosq->in_packet.pos += len;
mosq->in_packet.to_process -= len;
}else{
#ifdef WIN32
errno = WSAGetLastError();
#endif
if(errno == EAGAIN || errno == COMPAT_EWOULDBLOCK){
return MOSQ_ERR_SUCCESS;
}else{
_mosquitto_packet_cleanup(&mosq->in_packet);
switch(errno){
case 0:
return MOSQ_ERR_PROXY;
case COMPAT_ECONNRESET:
return MOSQ_ERR_CONN_LOST;
default:
return MOSQ_ERR_ERRNO;
}
}
}
}
if(mosq->in_packet.packet_length == 5){
/* First part of the packet has been received, we now know what else to expect. */
if(mosq->in_packet.payload[3] == SOCKS_ATYPE_IP_V4){
mosq->in_packet.to_process += 4+2-1; /* 4 bytes IPv4, 2 bytes port, -1 byte because we've already read the first byte */
mosq->in_packet.packet_length += 4+2-1;
}else if(mosq->in_packet.payload[3] == SOCKS_ATYPE_IP_V6){
mosq->in_packet.to_process += 16+2-1; /* 16 bytes IPv6, 2 bytes port, -1 byte because we've already read the first byte */
mosq->in_packet.packet_length += 16+2-1;
}else if(mosq->in_packet.payload[3] == SOCKS_ATYPE_DOMAINNAME){
if(mosq->in_packet.payload[4] > 0 && mosq->in_packet.payload[4] <= 255){
mosq->in_packet.to_process += mosq->in_packet.payload[4];
mosq->in_packet.packet_length += mosq->in_packet.payload[4];
}
}else{
_mosquitto_packet_cleanup(&mosq->in_packet);
return MOSQ_ERR_PROTOCOL;
}
payload = _mosquitto_realloc(mosq->in_packet.payload, mosq->in_packet.packet_length);
if(payload){
mosq->in_packet.payload = payload;
}else{
_mosquitto_packet_cleanup(&mosq->in_packet);
return MOSQ_ERR_NOMEM;
}
payload = _mosquitto_realloc(mosq->in_packet.payload, mosq->in_packet.packet_length);
if(payload){
mosq->in_packet.payload = payload;
}else{
_mosquitto_packet_cleanup(&mosq->in_packet);
return MOSQ_ERR_NOMEM;
}
return MOSQ_ERR_SUCCESS;
}
/* Entire packet is now read. */
if(mosq->in_packet.payload[0] != 5){
_mosquitto_packet_cleanup(&mosq->in_packet);
return MOSQ_ERR_PROXY;
}
if(mosq->in_packet.payload[1] == 0){
/* Auth passed */
_mosquitto_packet_cleanup(&mosq->in_packet);
mosq->state = mosq_cs_new;
return _mosquitto_send_connect(mosq, mosq->keepalive, mosq->clean_session);
}else{
i = mosq->in_packet.payload[1];
_mosquitto_packet_cleanup(&mosq->in_packet);
mosq->state = mosq_cs_socks5_new;
switch(i){
case SOCKS_REPLY_CONNECTION_NOT_ALLOWED:
return MOSQ_ERR_AUTH;
case SOCKS_REPLY_NETWORK_UNREACHABLE:
case SOCKS_REPLY_HOST_UNREACHABLE:
case SOCKS_REPLY_CONNECTION_REFUSED:
return MOSQ_ERR_NO_CONN;
case SOCKS_REPLY_GENERAL_FAILURE:
case SOCKS_REPLY_TTL_EXPIRED:
case SOCKS_REPLY_COMMAND_NOT_SUPPORTED:
case SOCKS_REPLY_ADDRESS_TYPE_NOT_SUPPORTED:
return MOSQ_ERR_PROXY;
default:
return MOSQ_ERR_INVAL;
}
}
}else{
return _mosquitto_packet_read(mosq);
}
return MOSQ_ERR_SUCCESS;
}
static void loop_handle_reads_writes(struct mosquitto_db *db, struct epoll_event *events, int efd)
{
int i, s;
for (i = 0; i < db->context_count; i++) {
if (db->contexts[i] && db->contexts[i]->sock != INVALID_SOCKET){
/* if (events[db->contexts[i]->pollfd_index].data.fd != db->contexts[i]->sock) { */
/* printf ("%d---%d\n", events[db->contexts[i]->pollfd_index].data.fd, db->contexts[i]->sock); */
/* printf ("%d\n", i); */
/* int n; */
/* for (n = 0; n < sizeof (db->contexts); ++n) */
/* { */
/* printf ("%d----%d\n", db->contexts[n]->pollfd_index, events[db->contexts[i]->pollfd_index].data.fd); */
/* } */
/* } */
/* assert(events[db->contexts[i]->pollfd_index].data.fd == db->contexts[i]->sock); */
#ifdef WITH_TLS
if (events[db->contexts[i]->pollfd_index].events & EPOLLOUT ||
db->contexts[i]->want_write ||
(db->contexts[i]->ssl && db->contexts[i]->state == mosq_cs_new)) {
#else
if(events[db->contexts[i]->epollfd_index].events & EPOLLOUT){
#endif
if(_mosquitto_packet_write(db->contexts[i])){
if(db->config->connection_messages == true){
if(db->contexts[i]->state != mosq_cs_disconnecting){
_mosquitto_log_printf(NULL, MOSQ_LOG_NOTICE, "Socket write error on client %s, disconnecting.", db->contexts[i]->id);
}else{
_mosquitto_log_printf(NULL, MOSQ_LOG_NOTICE, "Client %s disconnected.", db->contexts[i]->id);
}
}
/* Write error or other that means we should disconnect */
mqtt3_context_disconnect(db, db->contexts[i]);
}
}
}
if(db->contexts[i] && db->contexts[i]->sock != INVALID_SOCKET){
/* assert(events[db->contexts[i]->pollfd_index].data.fd == db->contexts[i]->sock); */
#ifdef WITH_TLS
if(events[db->contexts[i]->pollfd_index].events & EPOLLIN ||
db->contexts[i]->want_read ||
(db->contexts[i]->ssl && db->contexts[i]->state == mosq_cs_new)){
#else
if(events[db->contexts[i]->pollfd_index].events & EPOLLIN){
#endif
if(_mosquitto_packet_read(db, db->contexts[i])){
if(db->config->connection_messages == true){
if(db->contexts[i]->state != mosq_cs_disconnecting){
_mosquitto_log_printf(NULL, MOSQ_LOG_NOTICE, "Socket read error on client %s, disconnecting.", db->contexts[i]->id);
}else{
_mosquitto_log_printf(NULL, MOSQ_LOG_NOTICE, "Client %s disconnected.", db->contexts[i]->id);
}
}
/* Read error or other that means we should disconnect */
mqtt3_context_disconnect(db, db->contexts[i]);
}
}
}
if(db->contexts[i] && db->contexts[i]->sock != INVALID_SOCKET){
if(events[db->contexts[i]->pollfd_index].events & (EPOLLHUP | POLLRDHUP | EPOLLERR)){
s = epoll_ctl (efd, EPOLL_CTL_DEL, events[db->contexts[i]->pollfd_index].data.fd, &events[db->contexts[i]->pollfd_index]);
do_disconnect(db, i);
}
}
}
}
int mosquitto_loop_read(struct mosquitto *mosq)
{
return _mosquitto_packet_read(mosq);
}
