godot/modules/websocket/lws_peer.cpp
Fabio Alessandrelli 6a57f29573 Fix WebSocket crash due to non PDO init.
Move RingBuffer (and few related vars) to LWSPeer.
2018-08-06 03:47:02 +02:00

250 lines
6.5 KiB
C++

/*************************************************************************/
/* lws_peer.cpp */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* https://godotengine.org */
/*************************************************************************/
/* Copyright (c) 2007-2018 Juan Linietsky, Ariel Manzur. */
/* Copyright (c) 2014-2018 Godot Engine contributors (cf. AUTHORS.md) */
/* */
/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the */
/* "Software"), to deal in the Software without restriction, including */
/* without limitation the rights to use, copy, modify, merge, publish, */
/* distribute, sublicense, and/or sell copies of the Software, and to */
/* permit persons to whom the Software is furnished to do so, subject to */
/* the following conditions: */
/* */
/* The above copyright notice and this permission notice shall be */
/* included in all copies or substantial portions of the Software. */
/* */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
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/*************************************************************************/
#ifndef JAVASCRIPT_ENABLED
#include "lws_peer.h"
#include "core/io/ip.h"
// Needed for socket_helpers on Android at least. UNIXes has it, just include if not windows
#if !defined(WINDOWS_ENABLED)
#include <netinet/in.h>
#include <sys/socket.h>
#endif
#include "drivers/unix/socket_helpers.h"
void LWSPeer::set_wsi(struct lws *p_wsi) {
ERR_FAIL_COND(wsi != NULL);
rbw.resize(16);
rbr.resize(16);
wsi = p_wsi;
};
void LWSPeer::set_write_mode(WriteMode p_mode) {
write_mode = p_mode;
}
LWSPeer::WriteMode LWSPeer::get_write_mode() const {
return write_mode;
}
Error LWSPeer::read_wsi(void *in, size_t len) {
ERR_FAIL_COND_V(!is_connected_to_host(), FAILED);
PeerData *peer_data = (PeerData *)(lws_wsi_user(wsi));
uint32_t size = in_size;
uint8_t is_string = lws_frame_is_binary(wsi) ? 0 : 1;
if (rbr.space_left() < len + 5) {
ERR_EXPLAIN("Buffer full! Dropping data");
ERR_FAIL_V(FAILED);
}
copymem(&(input_buffer[size]), in, len);
size += len;
in_size = size;
if (lws_is_final_fragment(wsi)) {
rbr.write((uint8_t *)&size, 4);
rbr.write((uint8_t *)&is_string, 1);
rbr.write(input_buffer, size);
in_count++;
in_size = 0;
}
return OK;
}
Error LWSPeer::write_wsi() {
ERR_FAIL_COND_V(!is_connected_to_host(), FAILED);
PeerData *peer_data = (PeerData *)(lws_wsi_user(wsi));
PoolVector<uint8_t> tmp;
int left = rbw.data_left();
uint32_t to_write = 0;
if (left == 0 || out_count == 0)
return OK;
rbw.read((uint8_t *)&to_write, 4);
out_count--;
if (left < to_write) {
rbw.advance_read(left);
return FAILED;
}
tmp.resize(LWS_PRE + to_write);
rbw.read(&(tmp.write()[LWS_PRE]), to_write);
lws_write(wsi, &(tmp.write()[LWS_PRE]), to_write, (enum lws_write_protocol)write_mode);
tmp.resize(0);
if (out_count > 0)
lws_callback_on_writable(wsi); // we want to write more!
return OK;
}
Error LWSPeer::put_packet(const uint8_t *p_buffer, int p_buffer_size) {
ERR_FAIL_COND_V(!is_connected_to_host(), FAILED);
PeerData *peer_data = (PeerData *)lws_wsi_user(wsi);
rbw.write((uint8_t *)&p_buffer_size, 4);
rbw.write(p_buffer, MIN(p_buffer_size, rbw.space_left()));
out_count++;
lws_callback_on_writable(wsi); // notify that we want to write
return OK;
};
Error LWSPeer::get_packet(const uint8_t **r_buffer, int &r_buffer_size) {
ERR_FAIL_COND_V(!is_connected_to_host(), FAILED);
PeerData *peer_data = (PeerData *)lws_wsi_user(wsi);
if (in_count == 0)
return ERR_UNAVAILABLE;
uint32_t to_read = 0;
uint32_t left = 0;
uint8_t is_string = 0;
r_buffer_size = 0;
rbr.read((uint8_t *)&to_read, 4);
in_count--;
left = rbr.data_left();
if (left < to_read + 1) {
rbr.advance_read(left);
return FAILED;
}
rbr.read(&is_string, 1);
rbr.read(packet_buffer, to_read);
*r_buffer = packet_buffer;
r_buffer_size = to_read;
_was_string = is_string;
return OK;
};
int LWSPeer::get_available_packet_count() const {
if (!is_connected_to_host())
return 0;
return in_count;
};
bool LWSPeer::was_string_packet() const {
return _was_string;
};
bool LWSPeer::is_connected_to_host() const {
return wsi != NULL;
};
void LWSPeer::close() {
if (wsi != NULL) {
PeerData *data = ((PeerData *)lws_wsi_user(wsi));
data->force_close = true;
lws_callback_on_writable(wsi); // notify that we want to disconnect
}
wsi = NULL;
rbw.resize(0);
rbr.resize(0);
in_count = 0;
in_size = 0;
out_count = 0;
_was_string = false;
};
IP_Address LWSPeer::get_connected_host() const {
ERR_FAIL_COND_V(!is_connected_to_host(), IP_Address());
IP_Address ip;
int port = 0;
struct sockaddr_storage addr;
socklen_t len = sizeof(addr);
int fd = lws_get_socket_fd(wsi);
ERR_FAIL_COND_V(fd == -1, IP_Address());
int ret = getpeername(fd, (struct sockaddr *)&addr, &len);
ERR_FAIL_COND_V(ret != 0, IP_Address());
_set_ip_addr_port(ip, port, &addr);
return ip;
};
uint16_t LWSPeer::get_connected_port() const {
ERR_FAIL_COND_V(!is_connected_to_host(), 0);
IP_Address ip;
int port = 0;
struct sockaddr_storage addr;
socklen_t len = sizeof(addr);
int fd = lws_get_socket_fd(wsi);
ERR_FAIL_COND_V(fd == -1, 0);
int ret = getpeername(fd, (struct sockaddr *)&addr, &len);
ERR_FAIL_COND_V(ret != 0, 0);
_set_ip_addr_port(ip, port, &addr);
return port;
};
LWSPeer::LWSPeer() {
wsi = NULL;
write_mode = WRITE_MODE_BINARY;
close();
};
LWSPeer::~LWSPeer() {
close();
};
#endif // JAVASCRIPT_ENABLED