static void auto_event_error(struct bufferevent *buffev, short what, void *_arg)
{
redsocks_client *client = _arg;
int saved_errno = errno;
assert(buffev == client->relay || buffev == client->client);
redsocks_touch_client(client);
redsocks_log_errno(client, LOG_DEBUG, "Errno: %d, State: %d, what: %x", saved_errno, client->state, what);
if (buffev == client->relay)
{
if ( client->state == socks5_pre_detect
&& what == (EVBUFFER_WRITE|EVBUFFER_TIMEOUT))
{
/* In case timeout occurs for connecting relay, we try to connect
to target with SOCKS5 proxy. It is possible that the connection to
target can be set up a bit longer than the timeout value we set.
However, it is still better to make connection via proxy. */
auto_retry(client, 1);
return;
}
if (client->state == socks5_pre_detect && saved_errno == ECONNRESET)
if (!auto_retry_or_drop(client))
return;
if (client->state == socks5_direct && what == (EVBUFFER_READ|EVBUFFER_ERROR)
&& saved_errno == ECONNRESET )
{
if (!auto_retry_or_drop(client))
return;
}
}
if (what == (EVBUFFER_READ|EVBUFFER_EOF)) {
struct bufferevent *antiev;
if (buffev == client->relay)
antiev = client->client;
else
antiev = client->relay;
redsocks_shutdown(client, buffev, SHUT_RD);
if (antiev != NULL && EVBUFFER_LENGTH(antiev->output) == 0)
redsocks_shutdown(client, antiev, SHUT_WR);
}
else {
/*
myerrno = red_socket_geterrno(buffev);
redsocks_log_errno(client, LOG_NOTICE, "%s error, code " event_fmt_str,
buffev == client->relay ? "relay" : "client",
event_fmt(what));
*/
redsocks_drop_client(client);
}
}
static void auto_event_error(struct bufferevent *buffev, short what, void *_arg)
{
redsocks_client *client = _arg;
autoproxy_client * aclient = (void*)(client + 1) + client->instance->relay_ss->payload_len;
int saved_errno = errno;
assert(buffev == client->relay || buffev == client->client);
redsocks_touch_client(client);
redsocks_log_errno(client, LOG_DEBUG, "%s errno(%d), State: %d, what: " event_fmt_str,
buffev == client->client?"client":"relay",
saved_errno, aclient->state, event_fmt(what));
if (buffev == client->relay)
{
if ( aclient->state == AUTOPROXY_NEW
&& what == (EVBUFFER_WRITE|EVBUFFER_TIMEOUT))
{
on_connection_blocked(client);
/* In case timeout occurs while connecting relay, we try to connect
to target via SOCKS5 proxy. It is possible that the connection to
target can be set up a bit longer than the timeout value we set.
However, it is still better to make connection via proxy. */
auto_retry(client, 1);
return;
}
if (aclient->state == AUTOPROXY_NEW && saved_errno == ECONNRESET)
if (!auto_retry_or_drop(client))
return;
if (aclient->state == AUTOPROXY_CONNECTED && what == (EVBUFFER_READ|EVBUFFER_ERROR)
&& saved_errno == ECONNRESET )
{
if (!auto_retry_or_drop(client))
return;
}
}
if (what == (EVBUFFER_READ|EVBUFFER_EOF)) {
struct bufferevent *antiev;
if (buffev == client->relay)
antiev = client->client;
else
antiev = client->relay;
redsocks_shutdown(client, buffev, SHUT_RD);
if (antiev != NULL && EVBUFFER_LENGTH(antiev->output) == 0)
redsocks_shutdown(client, antiev, SHUT_WR);
}
else {
redsocks_drop_client(client);
}
}
static void auto_relay_connected(struct bufferevent *buffev, void *_arg)
{
redsocks_client *client = _arg;
assert(buffev == client->relay);
redsocks_touch_client(client);
if (!red_is_socket_connected_ok(buffev)) {
if (client->state == socks5_pre_detect && !auto_retry_or_drop(client))
return;
redsocks_log_error(client, LOG_DEBUG, "failed to connect to proxy");
goto fail;
}
/* We do not need to detect timeouts any more.
The two peers will handle it. */
bufferevent_set_timeouts(client->relay, NULL, NULL);
client->relay->readcb = client->instance->relay_ss->readcb;
client->relay->writecb = client->instance->relay_ss->writecb;
client->relay->writecb(buffev, _arg);
return;
fail:
redsocks_drop_client(client);
}
static void auto_relay_connected(struct bufferevent *buffev, void *_arg)
{
redsocks_client *client = _arg;
autoproxy_client * aclient = (void*)(client + 1) + client->instance->relay_ss->payload_len;
assert(buffev == client->relay);
redsocks_touch_client(client);
if (!red_is_socket_connected_ok(buffev)) {
if (aclient->state == AUTOPROXY_NEW && !auto_retry_or_drop(client))
return;
redsocks_log_error(client, LOG_DEBUG, "failed to connect to proxy");
goto fail;
}
/* update client state */
aclient->state = AUTOPROXY_CONNECTED;
/* We do not need to detect timeouts any more.
The two peers will handle it. */
bufferevent_set_timeouts(client->relay, NULL, NULL);
if (!redsocks_start_relay(client))
{
/* overwrite theread callback to my function */
client->client->readcb = direct_relay_clientreadcb;
client->client->writecb = direct_relay_clientwritecb;
client->relay->readcb = direct_relay_relayreadcb;
client->relay->writecb = direct_relay_relaywritecb;
}
else
{
redsocks_log_error(client, LOG_DEBUG, "failed to start relay");
goto fail;
}
client->relay->writecb(buffev, _arg);
return;
fail:
redsocks_drop_client(client);
}