299 lines
10 KiB
C++
299 lines
10 KiB
C++
/*************************************************************************/
|
|
/* packet_peer.cpp */
|
|
/*************************************************************************/
|
|
/* This file is part of: */
|
|
/* GODOT ENGINE */
|
|
/* https://godotengine.org */
|
|
/*************************************************************************/
|
|
/* Copyright (c) 2007-2021 Juan Linietsky, Ariel Manzur. */
|
|
/* Copyright (c) 2014-2021 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, */
|
|
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
|
|
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
|
|
/*************************************************************************/
|
|
|
|
#include "packet_peer.h"
|
|
|
|
#include "core/config/project_settings.h"
|
|
#include "core/io/marshalls.h"
|
|
|
|
/* helpers / binders */
|
|
|
|
void PacketPeer::set_encode_buffer_max_size(int p_max_size) {
|
|
ERR_FAIL_COND_MSG(p_max_size < 1024, "Max encode buffer must be at least 1024 bytes");
|
|
ERR_FAIL_COND_MSG(p_max_size > 256 * 1024 * 1024, "Max encode buffer cannot exceed 256 MiB");
|
|
encode_buffer_max_size = next_power_of_2(p_max_size);
|
|
encode_buffer.resize(0);
|
|
}
|
|
|
|
int PacketPeer::get_encode_buffer_max_size() const {
|
|
return encode_buffer_max_size;
|
|
}
|
|
|
|
Error PacketPeer::get_packet_buffer(Vector<uint8_t> &r_buffer) {
|
|
const uint8_t *buffer;
|
|
int buffer_size;
|
|
Error err = get_packet(&buffer, buffer_size);
|
|
if (err) {
|
|
return err;
|
|
}
|
|
|
|
r_buffer.resize(buffer_size);
|
|
if (buffer_size == 0) {
|
|
return OK;
|
|
}
|
|
|
|
uint8_t *w = r_buffer.ptrw();
|
|
for (int i = 0; i < buffer_size; i++) {
|
|
w[i] = buffer[i];
|
|
}
|
|
|
|
return OK;
|
|
}
|
|
|
|
Error PacketPeer::put_packet_buffer(const Vector<uint8_t> &p_buffer) {
|
|
int len = p_buffer.size();
|
|
if (len == 0) {
|
|
return OK;
|
|
}
|
|
|
|
const uint8_t *r = p_buffer.ptr();
|
|
return put_packet(&r[0], len);
|
|
}
|
|
|
|
Error PacketPeer::get_var(Variant &r_variant, bool p_allow_objects) {
|
|
const uint8_t *buffer;
|
|
int buffer_size;
|
|
Error err = get_packet(&buffer, buffer_size);
|
|
if (err) {
|
|
return err;
|
|
}
|
|
|
|
return decode_variant(r_variant, buffer, buffer_size, nullptr, p_allow_objects);
|
|
}
|
|
|
|
Error PacketPeer::put_var(const Variant &p_packet, bool p_full_objects) {
|
|
int len;
|
|
Error err = encode_variant(p_packet, nullptr, len, p_full_objects); // compute len first
|
|
if (err) {
|
|
return err;
|
|
}
|
|
|
|
if (len == 0) {
|
|
return OK;
|
|
}
|
|
|
|
ERR_FAIL_COND_V_MSG(len > encode_buffer_max_size, ERR_OUT_OF_MEMORY, "Failed to encode variant, encode size is bigger then encode_buffer_max_size. Consider raising it via 'set_encode_buffer_max_size'.");
|
|
|
|
if (unlikely(encode_buffer.size() < len)) {
|
|
encode_buffer.resize(0); // Avoid realloc
|
|
encode_buffer.resize(next_power_of_2(len));
|
|
}
|
|
|
|
uint8_t *w = encode_buffer.ptrw();
|
|
err = encode_variant(p_packet, w, len, p_full_objects);
|
|
ERR_FAIL_COND_V_MSG(err != OK, err, "Error when trying to encode Variant.");
|
|
|
|
return put_packet(w, len);
|
|
}
|
|
|
|
Variant PacketPeer::_bnd_get_var(bool p_allow_objects) {
|
|
Variant var;
|
|
Error err = get_var(var, p_allow_objects);
|
|
|
|
ERR_FAIL_COND_V(err != OK, Variant());
|
|
return var;
|
|
}
|
|
|
|
Error PacketPeer::_put_packet(const Vector<uint8_t> &p_buffer) {
|
|
return put_packet_buffer(p_buffer);
|
|
}
|
|
|
|
Vector<uint8_t> PacketPeer::_get_packet() {
|
|
Vector<uint8_t> raw;
|
|
last_get_error = get_packet_buffer(raw);
|
|
return raw;
|
|
}
|
|
|
|
Error PacketPeer::_get_packet_error() const {
|
|
return last_get_error;
|
|
}
|
|
|
|
void PacketPeer::_bind_methods() {
|
|
ClassDB::bind_method(D_METHOD("get_var", "allow_objects"), &PacketPeer::_bnd_get_var, DEFVAL(false));
|
|
ClassDB::bind_method(D_METHOD("put_var", "var", "full_objects"), &PacketPeer::put_var, DEFVAL(false));
|
|
ClassDB::bind_method(D_METHOD("get_packet"), &PacketPeer::_get_packet);
|
|
ClassDB::bind_method(D_METHOD("put_packet", "buffer"), &PacketPeer::_put_packet);
|
|
ClassDB::bind_method(D_METHOD("get_packet_error"), &PacketPeer::_get_packet_error);
|
|
ClassDB::bind_method(D_METHOD("get_available_packet_count"), &PacketPeer::get_available_packet_count);
|
|
|
|
ClassDB::bind_method(D_METHOD("get_encode_buffer_max_size"), &PacketPeer::get_encode_buffer_max_size);
|
|
ClassDB::bind_method(D_METHOD("set_encode_buffer_max_size", "max_size"), &PacketPeer::set_encode_buffer_max_size);
|
|
|
|
ADD_PROPERTY(PropertyInfo(Variant::INT, "encode_buffer_max_size"), "set_encode_buffer_max_size", "get_encode_buffer_max_size");
|
|
}
|
|
|
|
/***************/
|
|
|
|
void PacketPeerStream::_bind_methods() {
|
|
ClassDB::bind_method(D_METHOD("set_stream_peer", "peer"), &PacketPeerStream::set_stream_peer);
|
|
ClassDB::bind_method(D_METHOD("get_stream_peer"), &PacketPeerStream::get_stream_peer);
|
|
ClassDB::bind_method(D_METHOD("set_input_buffer_max_size", "max_size_bytes"), &PacketPeerStream::set_input_buffer_max_size);
|
|
ClassDB::bind_method(D_METHOD("set_output_buffer_max_size", "max_size_bytes"), &PacketPeerStream::set_output_buffer_max_size);
|
|
ClassDB::bind_method(D_METHOD("get_input_buffer_max_size"), &PacketPeerStream::get_input_buffer_max_size);
|
|
ClassDB::bind_method(D_METHOD("get_output_buffer_max_size"), &PacketPeerStream::get_output_buffer_max_size);
|
|
|
|
ADD_PROPERTY(PropertyInfo(Variant::INT, "input_buffer_max_size"), "set_input_buffer_max_size", "get_input_buffer_max_size");
|
|
ADD_PROPERTY(PropertyInfo(Variant::INT, "output_buffer_max_size"), "set_output_buffer_max_size", "get_output_buffer_max_size");
|
|
ADD_PROPERTY(PropertyInfo(Variant::OBJECT, "stream_peer", PROPERTY_HINT_RESOURCE_TYPE, "StreamPeer", 0), "set_stream_peer", "get_stream_peer");
|
|
}
|
|
|
|
Error PacketPeerStream::_poll_buffer() const {
|
|
ERR_FAIL_COND_V(peer.is_null(), ERR_UNCONFIGURED);
|
|
|
|
int read = 0;
|
|
ERR_FAIL_COND_V(input_buffer.size() < ring_buffer.space_left(), ERR_UNAVAILABLE);
|
|
Error err = peer->get_partial_data(input_buffer.ptrw(), ring_buffer.space_left(), read);
|
|
if (err) {
|
|
return err;
|
|
}
|
|
if (read == 0) {
|
|
return OK;
|
|
}
|
|
|
|
int w = ring_buffer.write(&input_buffer[0], read);
|
|
ERR_FAIL_COND_V(w != read, ERR_BUG);
|
|
|
|
return OK;
|
|
}
|
|
|
|
int PacketPeerStream::get_available_packet_count() const {
|
|
_poll_buffer();
|
|
|
|
uint32_t remaining = ring_buffer.data_left();
|
|
|
|
int ofs = 0;
|
|
int count = 0;
|
|
|
|
while (remaining >= 4) {
|
|
uint8_t lbuf[4];
|
|
ring_buffer.copy(lbuf, ofs, 4);
|
|
uint32_t len = decode_uint32(lbuf);
|
|
remaining -= 4;
|
|
ofs += 4;
|
|
if (len > remaining) {
|
|
break;
|
|
}
|
|
remaining -= len;
|
|
ofs += len;
|
|
count++;
|
|
}
|
|
|
|
return count;
|
|
}
|
|
|
|
Error PacketPeerStream::get_packet(const uint8_t **r_buffer, int &r_buffer_size) {
|
|
ERR_FAIL_COND_V(peer.is_null(), ERR_UNCONFIGURED);
|
|
_poll_buffer();
|
|
|
|
int remaining = ring_buffer.data_left();
|
|
ERR_FAIL_COND_V(remaining < 4, ERR_UNAVAILABLE);
|
|
uint8_t lbuf[4];
|
|
ring_buffer.copy(lbuf, 0, 4);
|
|
remaining -= 4;
|
|
uint32_t len = decode_uint32(lbuf);
|
|
ERR_FAIL_COND_V(remaining < (int)len, ERR_UNAVAILABLE);
|
|
|
|
ERR_FAIL_COND_V(input_buffer.size() < (int)len, ERR_UNAVAILABLE);
|
|
ring_buffer.read(lbuf, 4); //get rid of first 4 bytes
|
|
ring_buffer.read(input_buffer.ptrw(), len); // read packet
|
|
|
|
*r_buffer = &input_buffer[0];
|
|
r_buffer_size = len;
|
|
return OK;
|
|
}
|
|
|
|
Error PacketPeerStream::put_packet(const uint8_t *p_buffer, int p_buffer_size) {
|
|
ERR_FAIL_COND_V(peer.is_null(), ERR_UNCONFIGURED);
|
|
Error err = _poll_buffer(); //won't hurt to poll here too
|
|
|
|
if (err) {
|
|
return err;
|
|
}
|
|
|
|
if (p_buffer_size == 0) {
|
|
return OK;
|
|
}
|
|
|
|
ERR_FAIL_COND_V(p_buffer_size < 0, ERR_INVALID_PARAMETER);
|
|
ERR_FAIL_COND_V(p_buffer_size + 4 > output_buffer.size(), ERR_INVALID_PARAMETER);
|
|
|
|
encode_uint32(p_buffer_size, output_buffer.ptrw());
|
|
uint8_t *dst = &output_buffer.write[4];
|
|
for (int i = 0; i < p_buffer_size; i++) {
|
|
dst[i] = p_buffer[i];
|
|
}
|
|
|
|
return peer->put_data(&output_buffer[0], p_buffer_size + 4);
|
|
}
|
|
|
|
int PacketPeerStream::get_max_packet_size() const {
|
|
return output_buffer.size();
|
|
}
|
|
|
|
void PacketPeerStream::set_stream_peer(const Ref<StreamPeer> &p_peer) {
|
|
if (p_peer.ptr() != peer.ptr()) {
|
|
ring_buffer.advance_read(ring_buffer.data_left()); // Reset the ring buffer.
|
|
}
|
|
|
|
peer = p_peer;
|
|
}
|
|
|
|
Ref<StreamPeer> PacketPeerStream::get_stream_peer() const {
|
|
return peer;
|
|
}
|
|
|
|
void PacketPeerStream::set_input_buffer_max_size(int p_max_size) {
|
|
ERR_FAIL_COND_MSG(p_max_size < 0, "Max size of input buffer size cannot be smaller than 0.");
|
|
//warning may lose packets
|
|
ERR_FAIL_COND_MSG(ring_buffer.data_left(), "Buffer in use, resizing would cause loss of data.");
|
|
ring_buffer.resize(nearest_shift(next_power_of_2(p_max_size + 4)) - 1);
|
|
input_buffer.resize(next_power_of_2(p_max_size + 4));
|
|
}
|
|
|
|
int PacketPeerStream::get_input_buffer_max_size() const {
|
|
return input_buffer.size() - 4;
|
|
}
|
|
|
|
void PacketPeerStream::set_output_buffer_max_size(int p_max_size) {
|
|
output_buffer.resize(next_power_of_2(p_max_size + 4));
|
|
}
|
|
|
|
int PacketPeerStream::get_output_buffer_max_size() const {
|
|
return output_buffer.size() - 4;
|
|
}
|
|
|
|
PacketPeerStream::PacketPeerStream() {
|
|
int rbsize = GLOBAL_GET("network/limits/packet_peer_stream/max_buffer_po2");
|
|
|
|
ring_buffer.resize(rbsize);
|
|
input_buffer.resize(1 << rbsize);
|
|
output_buffer.resize(1 << rbsize);
|
|
}
|