270 lines
7.4 KiB
C++
270 lines
7.4 KiB
C++
/*************************************************************************/
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/* lws_peer.cpp */
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/*************************************************************************/
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/* This file is part of: */
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/* GODOT ENGINE */
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/* https://godotengine.org */
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/*************************************************************************/
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/* Copyright (c) 2007-2019 Juan Linietsky, Ariel Manzur. */
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/* Copyright (c) 2014-2019 Godot Engine contributors (cf. AUTHORS.md) */
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/* */
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/* Permission is hereby granted, free of charge, to any person obtaining */
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/* a copy of this software and associated documentation files (the */
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/* "Software"), to deal in the Software without restriction, including */
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/* without limitation the rights to use, copy, modify, merge, publish, */
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/* distribute, sublicense, and/or sell copies of the Software, and to */
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/* permit persons to whom the Software is furnished to do so, subject to */
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/* the following conditions: */
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/* */
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/* The above copyright notice and this permission notice shall be */
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/* included in all copies or substantial portions of the Software. */
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/* */
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/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
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/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
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/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
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/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
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/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
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/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
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/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
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/*************************************************************************/
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#ifndef JAVASCRIPT_ENABLED
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#include "lws_peer.h"
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#include "core/io/ip.h"
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// Needed for socket_helpers on Android at least. UNIXes has it, just include if not windows
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#if !defined(WINDOWS_ENABLED)
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#include <netinet/in.h>
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#include <sys/socket.h>
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#endif
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#include "drivers/unix/net_socket_posix.h"
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void LWSPeer::set_wsi(struct lws *p_wsi, unsigned int p_in_buf_size, unsigned int p_in_pkt_size, unsigned int p_out_buf_size, unsigned int p_out_pkt_size) {
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ERR_FAIL_COND(wsi != NULL);
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_in_buffer.resize(p_in_pkt_size, p_in_buf_size);
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_out_buffer.resize(p_out_pkt_size, p_out_buf_size);
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_packet_buffer.resize((1 << MAX(p_in_buf_size, p_out_buf_size)) + LWS_PRE);
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wsi = p_wsi;
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};
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void LWSPeer::set_write_mode(WriteMode p_mode) {
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write_mode = p_mode;
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}
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LWSPeer::WriteMode LWSPeer::get_write_mode() const {
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return write_mode;
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}
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Error LWSPeer::read_wsi(void *in, size_t len) {
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ERR_FAIL_COND_V(!is_connected_to_host(), FAILED);
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if (lws_is_first_fragment(wsi))
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_in_size = 0;
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else if (_in_size == -1) // Trash this frame
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return ERR_FILE_CORRUPT;
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Error err = _in_buffer.write_packet((const uint8_t *)in, len, NULL);
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if (err != OK) {
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_in_buffer.discard_payload(_in_size);
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_in_size = -1;
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ERR_FAIL_V(err);
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}
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_in_size += len;
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if (lws_is_final_fragment(wsi)) {
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uint8_t is_string = lws_frame_is_binary(wsi) ? 0 : 1;
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err = _in_buffer.write_packet(NULL, _in_size, &is_string);
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if (err != OK) {
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_in_buffer.discard_payload(_in_size);
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_in_size = -1;
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ERR_FAIL_V(err);
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}
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}
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return OK;
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}
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Error LWSPeer::write_wsi() {
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ERR_FAIL_COND_V(!is_connected_to_host(), FAILED);
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PoolVector<uint8_t> tmp;
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int count = _out_buffer.packets_left();
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if (count == 0)
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return OK;
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int read = 0;
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uint8_t is_string;
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PoolVector<uint8_t>::Write rw = _packet_buffer.write();
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_out_buffer.read_packet(&(rw[LWS_PRE]), _packet_buffer.size() - LWS_PRE, &is_string, read);
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enum lws_write_protocol mode = is_string ? LWS_WRITE_TEXT : LWS_WRITE_BINARY;
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lws_write(wsi, &(rw[LWS_PRE]), read, mode);
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if (count > 1)
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lws_callback_on_writable(wsi); // we want to write more!
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return OK;
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}
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Error LWSPeer::put_packet(const uint8_t *p_buffer, int p_buffer_size) {
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ERR_FAIL_COND_V(!is_connected_to_host(), FAILED);
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uint8_t is_string = write_mode == WRITE_MODE_TEXT;
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_out_buffer.write_packet(p_buffer, p_buffer_size, &is_string);
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lws_callback_on_writable(wsi); // notify that we want to write
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return OK;
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};
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Error LWSPeer::get_packet(const uint8_t **r_buffer, int &r_buffer_size) {
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r_buffer_size = 0;
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ERR_FAIL_COND_V(!is_connected_to_host(), FAILED);
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if (_in_buffer.packets_left() == 0)
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return ERR_UNAVAILABLE;
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int read = 0;
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PoolVector<uint8_t>::Write rw = _packet_buffer.write();
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_in_buffer.read_packet(rw.ptr(), _packet_buffer.size(), &_is_string, read);
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*r_buffer = rw.ptr();
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r_buffer_size = read;
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return OK;
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};
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int LWSPeer::get_available_packet_count() const {
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if (!is_connected_to_host())
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return 0;
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return _in_buffer.packets_left();
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};
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bool LWSPeer::was_string_packet() const {
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return _is_string;
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};
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bool LWSPeer::is_connected_to_host() const {
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return wsi != NULL;
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};
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String LWSPeer::get_close_reason(void *in, size_t len, int &r_code) {
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String s;
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r_code = 0;
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if (len < 2) // From docs this should not happen
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return s;
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const uint8_t *b = (const uint8_t *)in;
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r_code = b[0] << 8 | b[1];
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if (len > 2) {
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const char *utf8 = (const char *)&b[2];
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s.parse_utf8(utf8, len - 2);
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}
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return s;
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}
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void LWSPeer::send_close_status(struct lws *p_wsi) {
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if (close_code == -1)
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return;
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int len = close_reason.size();
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ERR_FAIL_COND(len > 123); // Maximum allowed reason size in bytes
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lws_close_status code = (lws_close_status)close_code;
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unsigned char *reason = len > 0 ? (unsigned char *)close_reason.utf8().ptrw() : NULL;
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lws_close_reason(p_wsi, code, reason, len);
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close_code = -1;
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close_reason = "";
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}
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void LWSPeer::close(int p_code, String p_reason) {
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if (wsi != NULL) {
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close_code = p_code;
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close_reason = p_reason;
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PeerData *data = ((PeerData *)lws_wsi_user(wsi));
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data->force_close = true;
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data->clean_close = true;
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lws_callback_on_writable(wsi); // Notify that we want to disconnect
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} else {
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close_code = -1;
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close_reason = "";
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}
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wsi = NULL;
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_in_buffer.clear();
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_out_buffer.clear();
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_in_size = 0;
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_is_string = 0;
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_packet_buffer.resize(0);
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};
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IP_Address LWSPeer::get_connected_host() const {
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ERR_FAIL_COND_V(!is_connected_to_host(), IP_Address());
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IP_Address ip;
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uint16_t port = 0;
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struct sockaddr_storage addr;
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socklen_t len = sizeof(addr);
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int fd = lws_get_socket_fd(wsi);
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ERR_FAIL_COND_V(fd == -1, IP_Address());
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int ret = getpeername(fd, (struct sockaddr *)&addr, &len);
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ERR_FAIL_COND_V(ret != 0, IP_Address());
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NetSocketPosix::_set_ip_port(&addr, ip, port);
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return ip;
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};
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uint16_t LWSPeer::get_connected_port() const {
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ERR_FAIL_COND_V(!is_connected_to_host(), 0);
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IP_Address ip;
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uint16_t port = 0;
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struct sockaddr_storage addr;
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socklen_t len = sizeof(addr);
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int fd = lws_get_socket_fd(wsi);
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ERR_FAIL_COND_V(fd == -1, 0);
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int ret = getpeername(fd, (struct sockaddr *)&addr, &len);
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ERR_FAIL_COND_V(ret != 0, 0);
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NetSocketPosix::_set_ip_port(&addr, ip, port);
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return port;
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};
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LWSPeer::LWSPeer() {
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wsi = NULL;
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write_mode = WRITE_MODE_BINARY;
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close();
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};
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LWSPeer::~LWSPeer() {
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close();
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};
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#endif // JAVASCRIPT_ENABLED
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