mirror of
https://github.com/godotengine/godot.git
synced 2024-12-02 00:52:50 +00:00
457 lines
15 KiB
C++
457 lines
15 KiB
C++
/**************************************************************************/
|
|
/* webrtc_multiplayer_peer.cpp */
|
|
/**************************************************************************/
|
|
/* This file is part of: */
|
|
/* GODOT ENGINE */
|
|
/* https://godotengine.org */
|
|
/**************************************************************************/
|
|
/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
|
|
/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur. */
|
|
/* */
|
|
/* 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 "webrtc_multiplayer_peer.h"
|
|
|
|
#include "core/io/marshalls.h"
|
|
#include "core/os/os.h"
|
|
|
|
void WebRTCMultiplayerPeer::_bind_methods() {
|
|
ClassDB::bind_method(D_METHOD("create_server", "channels_config"), &WebRTCMultiplayerPeer::create_server, DEFVAL(Array()));
|
|
ClassDB::bind_method(D_METHOD("create_client", "peer_id", "channels_config"), &WebRTCMultiplayerPeer::create_client, DEFVAL(Array()));
|
|
ClassDB::bind_method(D_METHOD("create_mesh", "peer_id", "channels_config"), &WebRTCMultiplayerPeer::create_mesh, DEFVAL(Array()));
|
|
ClassDB::bind_method(D_METHOD("add_peer", "peer", "peer_id", "unreliable_lifetime"), &WebRTCMultiplayerPeer::add_peer, DEFVAL(1));
|
|
ClassDB::bind_method(D_METHOD("remove_peer", "peer_id"), &WebRTCMultiplayerPeer::remove_peer);
|
|
ClassDB::bind_method(D_METHOD("has_peer", "peer_id"), &WebRTCMultiplayerPeer::has_peer);
|
|
ClassDB::bind_method(D_METHOD("get_peer", "peer_id"), &WebRTCMultiplayerPeer::get_peer);
|
|
ClassDB::bind_method(D_METHOD("get_peers"), &WebRTCMultiplayerPeer::get_peers);
|
|
}
|
|
|
|
void WebRTCMultiplayerPeer::set_target_peer(int p_peer_id) {
|
|
target_peer = p_peer_id;
|
|
}
|
|
|
|
/* Returns the ID of the MultiplayerPeer who sent the most recent packet: */
|
|
int WebRTCMultiplayerPeer::get_packet_peer() const {
|
|
return next_packet_peer;
|
|
}
|
|
|
|
int WebRTCMultiplayerPeer::get_packet_channel() const {
|
|
return next_packet_channel < CH_RESERVED_MAX ? 0 : next_packet_channel - CH_RESERVED_MAX + 1;
|
|
}
|
|
|
|
MultiplayerPeer::TransferMode WebRTCMultiplayerPeer::get_packet_mode() const {
|
|
ERR_FAIL_INDEX_V(next_packet_channel, channels_modes.size(), TRANSFER_MODE_RELIABLE);
|
|
return channels_modes[next_packet_channel];
|
|
}
|
|
|
|
bool WebRTCMultiplayerPeer::is_server() const {
|
|
return unique_id == TARGET_PEER_SERVER;
|
|
}
|
|
|
|
void WebRTCMultiplayerPeer::poll() {
|
|
if (peer_map.size() == 0) {
|
|
return;
|
|
}
|
|
|
|
List<int> remove;
|
|
List<int> add;
|
|
for (KeyValue<int, Ref<ConnectedPeer>> &E : peer_map) {
|
|
Ref<ConnectedPeer> peer = E.value;
|
|
peer->connection->poll();
|
|
// Check peer state
|
|
switch (peer->connection->get_connection_state()) {
|
|
case WebRTCPeerConnection::STATE_NEW:
|
|
case WebRTCPeerConnection::STATE_CONNECTING:
|
|
// Go to next peer, not ready yet.
|
|
continue;
|
|
case WebRTCPeerConnection::STATE_CONNECTED:
|
|
// Good to go, go ahead and check channel state.
|
|
break;
|
|
default:
|
|
// Peer is closed or in error state. Got to next peer.
|
|
remove.push_back(E.key);
|
|
continue;
|
|
}
|
|
// Check channels state
|
|
int ready = 0;
|
|
for (List<Ref<WebRTCDataChannel>>::Element *C = peer->channels.front(); C && C->get().is_valid(); C = C->next()) {
|
|
Ref<WebRTCDataChannel> ch = C->get();
|
|
switch (ch->get_ready_state()) {
|
|
case WebRTCDataChannel::STATE_CONNECTING:
|
|
continue;
|
|
case WebRTCDataChannel::STATE_OPEN:
|
|
ready++;
|
|
continue;
|
|
default:
|
|
// Channel was closed or in error state, remove peer id.
|
|
remove.push_back(E.key);
|
|
}
|
|
// We got a closed channel break out, the peer will be removed.
|
|
break;
|
|
}
|
|
// This peer has newly connected, and all channels are now open.
|
|
if (ready == peer->channels.size() && !peer->connected) {
|
|
peer->connected = true;
|
|
add.push_back(E.key);
|
|
}
|
|
}
|
|
// Remove disconnected peers
|
|
for (int &E : remove) {
|
|
remove_peer(E);
|
|
if (next_packet_peer == E) {
|
|
next_packet_peer = 0;
|
|
}
|
|
}
|
|
// Signal newly connected peers
|
|
for (int &E : add) {
|
|
// Already connected to server: simply notify new peer.
|
|
if (network_mode == MODE_CLIENT) {
|
|
ERR_CONTINUE(E != TARGET_PEER_SERVER); // Bug.
|
|
// Server connected.
|
|
connection_status = CONNECTION_CONNECTED;
|
|
emit_signal(SNAME("peer_connected"), TARGET_PEER_SERVER);
|
|
} else {
|
|
emit_signal(SNAME("peer_connected"), E);
|
|
}
|
|
}
|
|
// Fetch next packet
|
|
if (next_packet_peer == 0) {
|
|
_find_next_peer();
|
|
}
|
|
}
|
|
|
|
void WebRTCMultiplayerPeer::_find_next_peer() {
|
|
HashMap<int, Ref<ConnectedPeer>>::Iterator E = peer_map.find(next_packet_peer);
|
|
if (E) {
|
|
++E;
|
|
}
|
|
// After last.
|
|
while (E) {
|
|
if (!E->value->connected) {
|
|
++E;
|
|
continue;
|
|
}
|
|
int idx = 0;
|
|
for (const Ref<WebRTCDataChannel> &F : E->value->channels) {
|
|
if (F->get_available_packet_count()) {
|
|
next_packet_channel = idx;
|
|
next_packet_peer = E->key;
|
|
return;
|
|
}
|
|
idx++;
|
|
}
|
|
++E;
|
|
}
|
|
E = peer_map.begin();
|
|
// Before last
|
|
while (E) {
|
|
if (!E->value->connected) {
|
|
++E;
|
|
continue;
|
|
}
|
|
int idx = 0;
|
|
for (const Ref<WebRTCDataChannel> &F : E->value->channels) {
|
|
if (F->get_available_packet_count()) {
|
|
next_packet_channel = idx;
|
|
next_packet_peer = E->key;
|
|
return;
|
|
}
|
|
idx++;
|
|
}
|
|
if (E->key == (int)next_packet_peer) {
|
|
break;
|
|
}
|
|
++E;
|
|
}
|
|
// No packet found
|
|
next_packet_channel = 0;
|
|
next_packet_peer = 0;
|
|
}
|
|
|
|
MultiplayerPeer::ConnectionStatus WebRTCMultiplayerPeer::get_connection_status() const {
|
|
return connection_status;
|
|
}
|
|
|
|
Error WebRTCMultiplayerPeer::create_server(Array p_channels_config) {
|
|
return _initialize(1, MODE_SERVER, p_channels_config);
|
|
}
|
|
|
|
Error WebRTCMultiplayerPeer::create_client(int p_self_id, Array p_channels_config) {
|
|
ERR_FAIL_COND_V_MSG(p_self_id == 1, ERR_INVALID_PARAMETER, "Clients cannot have ID 1.");
|
|
return _initialize(p_self_id, MODE_CLIENT, p_channels_config);
|
|
}
|
|
|
|
Error WebRTCMultiplayerPeer::create_mesh(int p_self_id, Array p_channels_config) {
|
|
return _initialize(p_self_id, MODE_MESH, p_channels_config);
|
|
}
|
|
|
|
Error WebRTCMultiplayerPeer::_initialize(int p_self_id, NetworkMode p_mode, Array p_channels_config) {
|
|
ERR_FAIL_COND_V(p_self_id < 1 || p_self_id > ~(1 << 31), ERR_INVALID_PARAMETER);
|
|
channels_config.clear();
|
|
channels_modes.clear();
|
|
channels_modes.push_back(TRANSFER_MODE_RELIABLE);
|
|
channels_modes.push_back(TRANSFER_MODE_UNRELIABLE_ORDERED);
|
|
channels_modes.push_back(TRANSFER_MODE_UNRELIABLE);
|
|
for (int i = 0; i < p_channels_config.size(); i++) {
|
|
ERR_FAIL_COND_V_MSG(p_channels_config[i].get_type() != Variant::INT, ERR_INVALID_PARAMETER, "The 'channels_config' array must contain only enum values from 'MultiplayerPeer.TransferMode'");
|
|
int mode = p_channels_config[i].operator int();
|
|
// Initialize data channel configurations.
|
|
Dictionary cfg;
|
|
cfg["id"] = CH_RESERVED_MAX + i + 1;
|
|
cfg["negotiated"] = true;
|
|
cfg["ordered"] = true;
|
|
|
|
switch (mode) {
|
|
case TRANSFER_MODE_UNRELIABLE_ORDERED:
|
|
cfg["maxPacketLifetime"] = 1;
|
|
break;
|
|
case TRANSFER_MODE_UNRELIABLE:
|
|
cfg["maxPacketLifetime"] = 1;
|
|
cfg["ordered"] = false;
|
|
break;
|
|
case TRANSFER_MODE_RELIABLE:
|
|
break;
|
|
default:
|
|
ERR_FAIL_V_MSG(ERR_INVALID_PARAMETER, vformat("The 'channels_config' array must contain only enum values from 'MultiplayerPeer.TransferMode'. Got: %d", mode));
|
|
}
|
|
channels_config.push_back(cfg);
|
|
channels_modes.push_back((TransferMode)mode);
|
|
}
|
|
|
|
unique_id = p_self_id;
|
|
network_mode = p_mode;
|
|
|
|
// Mesh and server are always connected
|
|
if (p_mode != MODE_CLIENT) {
|
|
connection_status = CONNECTION_CONNECTED;
|
|
} else {
|
|
connection_status = CONNECTION_CONNECTING;
|
|
}
|
|
return OK;
|
|
}
|
|
|
|
bool WebRTCMultiplayerPeer::is_server_relay_supported() const {
|
|
return network_mode == MODE_SERVER || network_mode == MODE_CLIENT;
|
|
}
|
|
|
|
int WebRTCMultiplayerPeer::get_unique_id() const {
|
|
ERR_FAIL_COND_V(connection_status == CONNECTION_DISCONNECTED, 1);
|
|
return unique_id;
|
|
}
|
|
|
|
void WebRTCMultiplayerPeer::_peer_to_dict(Ref<ConnectedPeer> p_connected_peer, Dictionary &r_dict) {
|
|
Array channels;
|
|
for (Ref<WebRTCDataChannel> &F : p_connected_peer->channels) {
|
|
channels.push_back(F);
|
|
}
|
|
r_dict["connection"] = p_connected_peer->connection;
|
|
r_dict["connected"] = p_connected_peer->connected;
|
|
r_dict["channels"] = channels;
|
|
}
|
|
|
|
bool WebRTCMultiplayerPeer::has_peer(int p_peer_id) {
|
|
return peer_map.has(p_peer_id);
|
|
}
|
|
|
|
Dictionary WebRTCMultiplayerPeer::get_peer(int p_peer_id) {
|
|
ERR_FAIL_COND_V(!peer_map.has(p_peer_id), Dictionary());
|
|
Dictionary out;
|
|
_peer_to_dict(peer_map[p_peer_id], out);
|
|
return out;
|
|
}
|
|
|
|
Dictionary WebRTCMultiplayerPeer::get_peers() {
|
|
Dictionary out;
|
|
for (const KeyValue<int, Ref<ConnectedPeer>> &E : peer_map) {
|
|
Dictionary d;
|
|
_peer_to_dict(E.value, d);
|
|
out[E.key] = d;
|
|
}
|
|
return out;
|
|
}
|
|
|
|
Error WebRTCMultiplayerPeer::add_peer(Ref<WebRTCPeerConnection> p_peer, int p_peer_id, int p_unreliable_lifetime) {
|
|
ERR_FAIL_COND_V(network_mode == MODE_NONE, ERR_UNCONFIGURED);
|
|
ERR_FAIL_COND_V(network_mode == MODE_CLIENT && p_peer_id != 1, ERR_INVALID_PARAMETER);
|
|
ERR_FAIL_COND_V(network_mode == MODE_SERVER && p_peer_id == 1, ERR_INVALID_PARAMETER);
|
|
ERR_FAIL_COND_V(p_peer_id < 1 || p_peer_id > ~(1 << 31), ERR_INVALID_PARAMETER);
|
|
ERR_FAIL_COND_V(p_unreliable_lifetime < 0, ERR_INVALID_PARAMETER);
|
|
ERR_FAIL_COND_V(is_refusing_new_connections(), ERR_UNAUTHORIZED);
|
|
// Peer must be valid, and in new state (to create data channels)
|
|
ERR_FAIL_COND_V(!p_peer.is_valid(), ERR_INVALID_PARAMETER);
|
|
ERR_FAIL_COND_V(p_peer->get_connection_state() != WebRTCPeerConnection::STATE_NEW, ERR_INVALID_PARAMETER);
|
|
|
|
Ref<ConnectedPeer> peer = memnew(ConnectedPeer);
|
|
peer->connection = p_peer;
|
|
|
|
// Initialize data channels
|
|
Dictionary cfg;
|
|
cfg["negotiated"] = true;
|
|
cfg["ordered"] = true;
|
|
|
|
cfg["id"] = 1;
|
|
peer->channels[CH_RELIABLE] = p_peer->create_data_channel("reliable", cfg);
|
|
ERR_FAIL_COND_V(peer->channels[CH_RELIABLE].is_null(), FAILED);
|
|
|
|
cfg["id"] = 2;
|
|
cfg["maxPacketLifetime"] = p_unreliable_lifetime;
|
|
peer->channels[CH_ORDERED] = p_peer->create_data_channel("ordered", cfg);
|
|
ERR_FAIL_COND_V(peer->channels[CH_ORDERED].is_null(), FAILED);
|
|
|
|
cfg["id"] = 3;
|
|
cfg["ordered"] = false;
|
|
peer->channels[CH_UNRELIABLE] = p_peer->create_data_channel("unreliable", cfg);
|
|
ERR_FAIL_COND_V(peer->channels[CH_UNRELIABLE].is_null(), FAILED);
|
|
|
|
for (const Dictionary &dict : channels_config) {
|
|
Ref<WebRTCDataChannel> ch = p_peer->create_data_channel(String::num_int64(dict["id"]), dict);
|
|
ERR_FAIL_COND_V(ch.is_null(), FAILED);
|
|
peer->channels.push_back(ch);
|
|
}
|
|
|
|
peer_map[p_peer_id] = peer; // add the new peer connection to the peer_map
|
|
|
|
return OK;
|
|
}
|
|
|
|
void WebRTCMultiplayerPeer::remove_peer(int p_peer_id) {
|
|
ERR_FAIL_COND(!peer_map.has(p_peer_id));
|
|
Ref<ConnectedPeer> peer = peer_map[p_peer_id];
|
|
peer_map.erase(p_peer_id);
|
|
if (peer->connected) {
|
|
peer->connected = false;
|
|
emit_signal(SNAME("peer_disconnected"), p_peer_id);
|
|
if (network_mode == MODE_CLIENT && p_peer_id == TARGET_PEER_SERVER) {
|
|
connection_status = CONNECTION_DISCONNECTED;
|
|
}
|
|
}
|
|
}
|
|
|
|
void WebRTCMultiplayerPeer::disconnect_peer(int p_peer_id, bool p_force) {
|
|
ERR_FAIL_COND(!peer_map.has(p_peer_id));
|
|
if (p_force) {
|
|
peer_map.erase(p_peer_id);
|
|
if (network_mode == MODE_CLIENT && p_peer_id == TARGET_PEER_SERVER) {
|
|
connection_status = CONNECTION_DISCONNECTED;
|
|
}
|
|
} else {
|
|
peer_map[p_peer_id]->connection->close(); // Will be removed during next poll.
|
|
}
|
|
}
|
|
|
|
Error WebRTCMultiplayerPeer::get_packet(const uint8_t **r_buffer, int &r_buffer_size) {
|
|
// Peer not available
|
|
if (next_packet_peer == 0 || !peer_map.has(next_packet_peer)) {
|
|
_find_next_peer();
|
|
ERR_FAIL_V(ERR_UNAVAILABLE);
|
|
}
|
|
for (Ref<WebRTCDataChannel> &E : peer_map[next_packet_peer]->channels) {
|
|
if (E->get_available_packet_count()) {
|
|
Error err = E->get_packet(r_buffer, r_buffer_size);
|
|
_find_next_peer();
|
|
return err;
|
|
}
|
|
}
|
|
// Channels for that peer were empty. Bug?
|
|
_find_next_peer();
|
|
ERR_FAIL_V(ERR_BUG);
|
|
}
|
|
|
|
Error WebRTCMultiplayerPeer::put_packet(const uint8_t *p_buffer, int p_buffer_size) {
|
|
ERR_FAIL_COND_V(connection_status == CONNECTION_DISCONNECTED, ERR_UNCONFIGURED);
|
|
|
|
int ch = get_transfer_channel();
|
|
if (ch == 0) {
|
|
switch (get_transfer_mode()) {
|
|
case TRANSFER_MODE_RELIABLE:
|
|
ch = CH_RELIABLE;
|
|
break;
|
|
case TRANSFER_MODE_UNRELIABLE_ORDERED:
|
|
ch = CH_ORDERED;
|
|
break;
|
|
case TRANSFER_MODE_UNRELIABLE:
|
|
ch = CH_UNRELIABLE;
|
|
break;
|
|
}
|
|
} else {
|
|
ch += CH_RESERVED_MAX - 1;
|
|
}
|
|
|
|
if (target_peer > 0) {
|
|
HashMap<int, Ref<ConnectedPeer>>::Iterator E = peer_map.find(target_peer);
|
|
ERR_FAIL_COND_V_MSG(!E, ERR_INVALID_PARAMETER, "Invalid target peer: " + itos(target_peer) + ".");
|
|
|
|
ERR_FAIL_COND_V_MSG(E->value->channels.size() <= ch, ERR_INVALID_PARAMETER, vformat("Unable to send packet on channel %d, max channels: %d", ch, E->value->channels.size()));
|
|
ERR_FAIL_COND_V(E->value->channels[ch].is_null(), ERR_BUG);
|
|
return E->value->channels[ch]->put_packet(p_buffer, p_buffer_size);
|
|
|
|
} else {
|
|
int exclude = -target_peer;
|
|
|
|
for (KeyValue<int, Ref<ConnectedPeer>> &F : peer_map) {
|
|
// Exclude packet. If target_peer == 0 then don't exclude any packets
|
|
if (target_peer != 0 && F.key == exclude) {
|
|
continue;
|
|
}
|
|
|
|
ERR_CONTINUE_MSG(F.value->channels.size() <= ch, vformat("Unable to send packet on channel %d, max channels: %d", ch, F.value->channels.size()));
|
|
ERR_CONTINUE(F.value->channels[ch].is_null());
|
|
F.value->channels[ch]->put_packet(p_buffer, p_buffer_size);
|
|
}
|
|
}
|
|
return OK;
|
|
}
|
|
|
|
int WebRTCMultiplayerPeer::get_available_packet_count() const {
|
|
if (next_packet_peer == 0) {
|
|
return 0; // To be sure next call to get_packet works if size > 0 .
|
|
}
|
|
int size = 0;
|
|
for (const KeyValue<int, Ref<ConnectedPeer>> &E : peer_map) {
|
|
if (!E.value->connected) {
|
|
continue;
|
|
}
|
|
for (const Ref<WebRTCDataChannel> &F : E.value->channels) {
|
|
size += F->get_available_packet_count();
|
|
}
|
|
}
|
|
return size;
|
|
}
|
|
|
|
int WebRTCMultiplayerPeer::get_max_packet_size() const {
|
|
return 1200;
|
|
}
|
|
|
|
void WebRTCMultiplayerPeer::close() {
|
|
peer_map.clear();
|
|
channels_config.clear();
|
|
unique_id = 0;
|
|
next_packet_peer = 0;
|
|
next_packet_channel = 0;
|
|
target_peer = 0;
|
|
network_mode = MODE_NONE;
|
|
connection_status = CONNECTION_DISCONNECTED;
|
|
}
|
|
|
|
WebRTCMultiplayerPeer::~WebRTCMultiplayerPeer() {
|
|
close();
|
|
}
|