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godot/core/io/multiplayer_api.cpp
Rémi Verschelde 1426cd3b3a
One Copyright Update to rule them all 
As many open source projects have started doing it, we're removing the
current year from the copyright notice, so that we don't need to bump
it every year.

It seems like only the first year of publication is technically
relevant for copyright notices, and even that seems to be something
that many companies stopped listing altogether (in a version controlled
codebase, the commits are a much better source of date of publication
than a hardcoded copyright statement).

We also now list Godot Engine contributors first as we're collectively
the current maintainers of the project, and we clarify that the
"exclusive" copyright of the co-founders covers the timespan before
opensourcing (their further contributions are included as part of Godot
Engine contributors).

Also fixed "cf." Frenchism - it's meant as "refer to / see".

Backported from #70885.
2023-01-10 15:26:54 +01:00

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/**************************************************************************/
/* multiplayer_api.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 "multiplayer_api.h"
#include "core/io/marshalls.h"
#include "scene/main/node.h"
#ifdef DEBUG_ENABLED
#include "core/os/os.h"
#endif
_FORCE_INLINE_ bool _should_call_local(MultiplayerAPI::RPCMode mode, bool is_master, bool &r_skip_rpc) {
switch (mode) {
case MultiplayerAPI::RPC_MODE_DISABLED: {
// Do nothing.
} break;
case MultiplayerAPI::RPC_MODE_REMOTE: {
// Do nothing also. Remote cannot produce a local call.
} break;
case MultiplayerAPI::RPC_MODE_MASTERSYNC: {
if (is_master) {
r_skip_rpc = true; // I am the master, so skip remote call.
}
FALLTHROUGH;
}
case MultiplayerAPI::RPC_MODE_REMOTESYNC:
case MultiplayerAPI::RPC_MODE_PUPPETSYNC: {
// Call it, sync always results in a local call.
return true;
} break;
case MultiplayerAPI::RPC_MODE_MASTER: {
if (is_master) {
r_skip_rpc = true; // I am the master, so skip remote call.
}
return is_master;
} break;
case MultiplayerAPI::RPC_MODE_PUPPET: {
return !is_master;
} break;
}
return false;
}
_FORCE_INLINE_ bool _can_call_mode(Node *p_node, MultiplayerAPI::RPCMode mode, int p_remote_id) {
switch (mode) {
case MultiplayerAPI::RPC_MODE_DISABLED: {
return false;
} break;
case MultiplayerAPI::RPC_MODE_REMOTE:
case MultiplayerAPI::RPC_MODE_REMOTESYNC: {
return true;
} break;
case MultiplayerAPI::RPC_MODE_MASTERSYNC:
case MultiplayerAPI::RPC_MODE_MASTER: {
return p_node->is_network_master();
} break;
case MultiplayerAPI::RPC_MODE_PUPPETSYNC:
case MultiplayerAPI::RPC_MODE_PUPPET: {
return !p_node->is_network_master() && p_remote_id == p_node->get_network_master();
} break;
}
return false;
}
void MultiplayerAPI::poll() {
if (!network_peer.is_valid() || network_peer->get_connection_status() == NetworkedMultiplayerPeer::CONNECTION_DISCONNECTED) {
return;
}
network_peer->poll();
if (!network_peer.is_valid()) { // It's possible that polling might have resulted in a disconnection, so check here.
return;
}
while (network_peer->get_available_packet_count()) {
int sender = network_peer->get_packet_peer();
const uint8_t *packet;
int len;
Error err = network_peer->get_packet(&packet, len);
if (err != OK) {
ERR_PRINT("Error getting packet!");
break; // Something is wrong!
}
rpc_sender_id = sender;
_process_packet(sender, packet, len);
rpc_sender_id = 0;
if (!network_peer.is_valid()) {
break; // It's also possible that a packet or RPC caused a disconnection, so also check here.
}
}
}
void MultiplayerAPI::clear() {
connected_peers.clear();
path_get_cache.clear();
path_send_cache.clear();
packet_cache.clear();
last_send_cache_id = 1;
}
void MultiplayerAPI::set_root_node(Node *p_node) {
root_node = p_node;
}
Node *MultiplayerAPI::get_root_node() {
return root_node;
}
void MultiplayerAPI::set_network_peer(const Ref<NetworkedMultiplayerPeer> &p_peer) {
if (p_peer == network_peer) {
return; // Nothing to do
}
ERR_FAIL_COND_MSG(p_peer.is_valid() && p_peer->get_connection_status() == NetworkedMultiplayerPeer::CONNECTION_DISCONNECTED,
"Supplied NetworkedMultiplayerPeer must be connecting or connected.");
if (network_peer.is_valid()) {
network_peer->disconnect("peer_connected", this, "_add_peer");
network_peer->disconnect("peer_disconnected", this, "_del_peer");
network_peer->disconnect("connection_succeeded", this, "_connected_to_server");
network_peer->disconnect("connection_failed", this, "_connection_failed");
network_peer->disconnect("server_disconnected", this, "_server_disconnected");
clear();
}
network_peer = p_peer;
if (network_peer.is_valid()) {
network_peer->connect("peer_connected", this, "_add_peer");
network_peer->connect("peer_disconnected", this, "_del_peer");
network_peer->connect("connection_succeeded", this, "_connected_to_server");
network_peer->connect("connection_failed", this, "_connection_failed");
network_peer->connect("server_disconnected", this, "_server_disconnected");
}
}
Ref<NetworkedMultiplayerPeer> MultiplayerAPI::get_network_peer() const {
return network_peer;
}
void MultiplayerAPI::_process_packet(int p_from, const uint8_t *p_packet, int p_packet_len) {
ERR_FAIL_COND_MSG(root_node == nullptr, "Multiplayer root node was not initialized. If you are using custom multiplayer, remember to set the root node via MultiplayerAPI.set_root_node before using it.");
ERR_FAIL_COND_MSG(p_packet_len < 1, "Invalid packet received. Size too small.");
#ifdef DEBUG_ENABLED
if (profiling) {
bandwidth_incoming_data.write[bandwidth_incoming_pointer].timestamp = OS::get_singleton()->get_ticks_msec();
bandwidth_incoming_data.write[bandwidth_incoming_pointer].packet_size = p_packet_len;
bandwidth_incoming_pointer = (bandwidth_incoming_pointer + 1) % bandwidth_incoming_data.size();
}
#endif
uint8_t packet_type = p_packet[0];
switch (packet_type) {
case NETWORK_COMMAND_SIMPLIFY_PATH: {
_process_simplify_path(p_from, p_packet, p_packet_len);
} break;
case NETWORK_COMMAND_CONFIRM_PATH: {
_process_confirm_path(p_from, p_packet, p_packet_len);
} break;
case NETWORK_COMMAND_REMOTE_CALL:
case NETWORK_COMMAND_REMOTE_SET: {
ERR_FAIL_COND_MSG(p_packet_len < 6, "Invalid packet received. Size too small.");
Node *node = _process_get_node(p_from, p_packet, p_packet_len);
ERR_FAIL_COND_MSG(node == nullptr, "Invalid packet received. Requested node was not found.");
// Detect cstring end.
int len_end = 5;
for (; len_end < p_packet_len; len_end++) {
if (p_packet[len_end] == 0) {
break;
}
}
ERR_FAIL_COND_MSG(len_end >= p_packet_len, "Invalid packet received. Size too small.");
StringName name = String::utf8((const char *)&p_packet[5]);
if (packet_type == NETWORK_COMMAND_REMOTE_CALL) {
_process_rpc(node, name, p_from, p_packet, p_packet_len, len_end + 1);
} else {
_process_rset(node, name, p_from, p_packet, p_packet_len, len_end + 1);
}
} break;
case NETWORK_COMMAND_RAW: {
_process_raw(p_from, p_packet, p_packet_len);
} break;
}
}
Node *MultiplayerAPI::_process_get_node(int p_from, const uint8_t *p_packet, int p_packet_len) {
uint32_t target = decode_uint32(&p_packet[1]);
Node *node = nullptr;
if (target & 0x80000000) {
// Use full path (not cached yet).
int ofs = target & 0x7FFFFFFF;
ERR_FAIL_COND_V_MSG(ofs >= p_packet_len, nullptr, "Invalid packet received. Size smaller than declared.");
String paths;
paths.parse_utf8((const char *)&p_packet[ofs], p_packet_len - ofs);
NodePath np = paths;
node = root_node->get_node(np);
if (!node)
ERR_PRINT("Failed to get path from RPC: " + String(np) + ".");
} else {
// Use cached path.
int id = target;
Map<int, PathGetCache>::Element *E = path_get_cache.find(p_from);
ERR_FAIL_COND_V_MSG(!E, nullptr, "Invalid packet received. Requests invalid peer cache.");
Map<int, PathGetCache::NodeInfo>::Element *F = E->get().nodes.find(id);
ERR_FAIL_COND_V_MSG(!F, nullptr, "Invalid packet received. Unabled to find requested cached node.");
PathGetCache::NodeInfo *ni = &F->get();
// Do proper caching later.
node = root_node->get_node(ni->path);
if (!node)
ERR_PRINT("Failed to get cached path from RPC: " + String(ni->path) + ".");
}
return node;
}
void MultiplayerAPI::_process_rpc(Node *p_node, const StringName &p_name, int p_from, const uint8_t *p_packet, int p_packet_len, int p_offset) {
ERR_FAIL_COND_MSG(p_offset >= p_packet_len, "Invalid packet received. Size too small.");
// Check that remote can call the RPC on this node.
RPCMode rpc_mode = RPC_MODE_DISABLED;
const Map<StringName, RPCMode>::Element *E = p_node->get_node_rpc_mode(p_name);
if (E) {
rpc_mode = E->get();
} else if (p_node->get_script_instance()) {
rpc_mode = p_node->get_script_instance()->get_rpc_mode(p_name);
}
bool can_call = _can_call_mode(p_node, rpc_mode, p_from);
ERR_FAIL_COND_MSG(!can_call, "RPC '" + String(p_name) + "' is not allowed on node " + p_node->get_path() + " from: " + itos(p_from) + ". Mode is " + itos((int)rpc_mode) + ", master is " + itos(p_node->get_network_master()) + ".");
int argc = p_packet[p_offset];
Vector<Variant> args;
Vector<const Variant *> argp;
args.resize(argc);
argp.resize(argc);
p_offset++;
#ifdef DEBUG_ENABLED
if (profiling) {
ObjectID id = p_node->get_instance_id();
_init_node_profile(id);
profiler_frame_data[id].incoming_rpc += 1;
}
#endif
for (int i = 0; i < argc; i++) {
ERR_FAIL_COND_MSG(p_offset >= p_packet_len, "Invalid packet received. Size too small.");
int vlen;
Error err = decode_variant(args.write[i], &p_packet[p_offset], p_packet_len - p_offset, &vlen, allow_object_decoding || network_peer->is_object_decoding_allowed());
ERR_FAIL_COND_MSG(err != OK, "Invalid packet received. Unable to decode RPC argument.");
argp.write[i] = &args[i];
p_offset += vlen;
}
Variant::CallError ce;
p_node->call(p_name, (const Variant **)argp.ptr(), argc, ce);
if (ce.error != Variant::CallError::CALL_OK) {
String error = Variant::get_call_error_text(p_node, p_name, (const Variant **)argp.ptr(), argc, ce);
error = "RPC - " + error;
ERR_PRINT(error);
}
}
void MultiplayerAPI::_process_rset(Node *p_node, const StringName &p_name, int p_from, const uint8_t *p_packet, int p_packet_len, int p_offset) {
ERR_FAIL_COND_MSG(p_offset >= p_packet_len, "Invalid packet received. Size too small.");
// Check that remote can call the RSET on this node.
RPCMode rset_mode = RPC_MODE_DISABLED;
const Map<StringName, RPCMode>::Element *E = p_node->get_node_rset_mode(p_name);
if (E) {
rset_mode = E->get();
} else if (p_node->get_script_instance()) {
rset_mode = p_node->get_script_instance()->get_rset_mode(p_name);
}
bool can_call = _can_call_mode(p_node, rset_mode, p_from);
ERR_FAIL_COND_MSG(!can_call, "RSET '" + String(p_name) + "' is not allowed on node " + p_node->get_path() + " from: " + itos(p_from) + ". Mode is " + itos((int)rset_mode) + ", master is " + itos(p_node->get_network_master()) + ".");
#ifdef DEBUG_ENABLED
if (profiling) {
ObjectID id = p_node->get_instance_id();
_init_node_profile(id);
profiler_frame_data[id].incoming_rset += 1;
}
#endif
Variant value;
Error err = decode_variant(value, &p_packet[p_offset], p_packet_len - p_offset, nullptr, allow_object_decoding || network_peer->is_object_decoding_allowed());
ERR_FAIL_COND_MSG(err != OK, "Invalid packet received. Unable to decode RSET value.");
bool valid;
p_node->set(p_name, value, &valid);
if (!valid) {
String error = "Error setting remote property '" + String(p_name) + "', not found in object of type " + p_node->get_class() + ".";
ERR_PRINT(error);
}
}
void MultiplayerAPI::_process_simplify_path(int p_from, const uint8_t *p_packet, int p_packet_len) {
ERR_FAIL_COND_MSG(p_packet_len < 5, "Invalid packet received. Size too small.");
int id = decode_uint32(&p_packet[1]);
String paths;
paths.parse_utf8((const char *)&p_packet[5], p_packet_len - 5);
NodePath path = paths;
if (!path_get_cache.has(p_from)) {
path_get_cache[p_from] = PathGetCache();
}
PathGetCache::NodeInfo ni;
ni.path = path;
ni.instance = 0;
path_get_cache[p_from].nodes[id] = ni;
// Encode path to send ack.
CharString pname = String(path).utf8();
int len = encode_cstring(pname.get_data(), nullptr);
Vector<uint8_t> packet;
packet.resize(1 + len);
packet.write[0] = NETWORK_COMMAND_CONFIRM_PATH;
encode_cstring(pname.get_data(), &packet.write[1]);
network_peer->set_transfer_mode(NetworkedMultiplayerPeer::TRANSFER_MODE_RELIABLE);
network_peer->set_target_peer(p_from);
network_peer->put_packet(packet.ptr(), packet.size());
}
void MultiplayerAPI::_process_confirm_path(int p_from, const uint8_t *p_packet, int p_packet_len) {
ERR_FAIL_COND_MSG(p_packet_len < 2, "Invalid packet received. Size too small.");
String paths;
paths.parse_utf8((const char *)&p_packet[1], p_packet_len - 1);
NodePath path = paths;
PathSentCache *psc = path_send_cache.getptr(path);
ERR_FAIL_COND_MSG(!psc, "Invalid packet received. Tries to confirm a path which was not found in cache.");
Map<int, bool>::Element *E = psc->confirmed_peers.find(p_from);
ERR_FAIL_COND_MSG(!E, "Invalid packet received. Source peer was not found in cache for the given path.");
E->get() = true;
}
bool MultiplayerAPI::_send_confirm_path(NodePath p_path, PathSentCache *psc, int p_target) {
bool has_all_peers = true;
List<int> peers_to_add; // If one is missing, take note to add it.
for (Set<int>::Element *E = connected_peers.front(); E; E = E->next()) {
if (p_target < 0 && E->get() == -p_target) {
continue; // Continue, excluded.
}
if (p_target > 0 && E->get() != p_target) {
continue; // Continue, not for this peer.
}
Map<int, bool>::Element *F = psc->confirmed_peers.find(E->get());
if (!F || !F->get()) {
// Path was not cached, or was cached but is unconfirmed.
if (!F) {
// Not cached at all, take note.
peers_to_add.push_back(E->get());
}
has_all_peers = false;
}
}
// Those that need to be added, send a message for this.
for (List<int>::Element *E = peers_to_add.front(); E; E = E->next()) {
// Encode function name.
CharString pname = String(p_path).utf8();
int len = encode_cstring(pname.get_data(), nullptr);
Vector<uint8_t> packet;
packet.resize(1 + 4 + len);
packet.write[0] = NETWORK_COMMAND_SIMPLIFY_PATH;
encode_uint32(psc->id, &packet.write[1]);
encode_cstring(pname.get_data(), &packet.write[5]);
network_peer->set_target_peer(E->get()); // To all of you.
network_peer->set_transfer_mode(NetworkedMultiplayerPeer::TRANSFER_MODE_RELIABLE);
network_peer->put_packet(packet.ptr(), packet.size());
psc->confirmed_peers.insert(E->get(), false); // Insert into confirmed, but as false since it was not confirmed.
}
return has_all_peers;
}
void MultiplayerAPI::_send_rpc(Node *p_from, int p_to, bool p_unreliable, bool p_set, const StringName &p_name, const Variant **p_arg, int p_argcount) {
ERR_FAIL_COND_MSG(network_peer.is_null(), "Attempt to remote call/set when networking is not active in SceneTree.");
ERR_FAIL_COND_MSG(network_peer->get_connection_status() == NetworkedMultiplayerPeer::CONNECTION_CONNECTING, "Attempt to remote call/set when networking is not connected yet in SceneTree.");
ERR_FAIL_COND_MSG(network_peer->get_connection_status() == NetworkedMultiplayerPeer::CONNECTION_DISCONNECTED, "Attempt to remote call/set when networking is disconnected.");
ERR_FAIL_COND_MSG(p_argcount > 255, "Too many arguments >255.");
if (p_to != 0 && !connected_peers.has(ABS(p_to))) {
ERR_FAIL_COND_MSG(p_to == network_peer->get_unique_id(), "Attempt to remote call/set yourself! unique ID: " + itos(network_peer->get_unique_id()) + ".");
ERR_FAIL_MSG("Attempt to remote call unexisting ID: " + itos(p_to) + ".");
}
NodePath from_path = (root_node->get_path()).rel_path_to(p_from->get_path());
ERR_FAIL_COND_MSG(from_path.is_empty(), "Unable to send RPC. Relative path is empty. THIS IS LIKELY A BUG IN THE ENGINE!");
// See if the path is cached.
PathSentCache *psc = path_send_cache.getptr(from_path);
if (!psc) {
// Path is not cached, create.
path_send_cache[from_path] = PathSentCache();
psc = path_send_cache.getptr(from_path);
psc->id = last_send_cache_id++;
}
// Create base packet, lots of hardcode because it must be tight.
int ofs = 0;
#define MAKE_ROOM(m_amount) \
if (packet_cache.size() < m_amount) \
packet_cache.resize(m_amount);
// Encode type.
MAKE_ROOM(1);
packet_cache.write[0] = p_set ? NETWORK_COMMAND_REMOTE_SET : NETWORK_COMMAND_REMOTE_CALL;
ofs += 1;
// Encode ID.
MAKE_ROOM(ofs + 4);
encode_uint32(psc->id, &(packet_cache.write[ofs]));
ofs += 4;
// Encode function name.
CharString name = String(p_name).utf8();
int len = encode_cstring(name.get_data(), nullptr);
MAKE_ROOM(ofs + len);
encode_cstring(name.get_data(), &(packet_cache.write[ofs]));
ofs += len;
if (p_set) {
// Set argument.
Error err = encode_variant(*p_arg[0], nullptr, len, allow_object_decoding || network_peer->is_object_decoding_allowed());
ERR_FAIL_COND_MSG(err != OK, "Unable to encode RSET value. THIS IS LIKELY A BUG IN THE ENGINE!");
MAKE_ROOM(ofs + len);
encode_variant(*p_arg[0], &(packet_cache.write[ofs]), len, allow_object_decoding || network_peer->is_object_decoding_allowed());
ofs += len;
} else {
// Call arguments.
MAKE_ROOM(ofs + 1);
packet_cache.write[ofs] = p_argcount;
ofs += 1;
for (int i = 0; i < p_argcount; i++) {
Error err = encode_variant(*p_arg[i], nullptr, len, allow_object_decoding || network_peer->is_object_decoding_allowed());
ERR_FAIL_COND_MSG(err != OK, "Unable to encode RPC argument. THIS IS LIKELY A BUG IN THE ENGINE!");
MAKE_ROOM(ofs + len);
encode_variant(*p_arg[i], &(packet_cache.write[ofs]), len, allow_object_decoding || network_peer->is_object_decoding_allowed());
ofs += len;
}
}
#ifdef DEBUG_ENABLED
if (profiling) {
bandwidth_outgoing_data.write[bandwidth_outgoing_pointer].timestamp = OS::get_singleton()->get_ticks_msec();
bandwidth_outgoing_data.write[bandwidth_outgoing_pointer].packet_size = ofs;
bandwidth_outgoing_pointer = (bandwidth_outgoing_pointer + 1) % bandwidth_outgoing_data.size();
}
#endif
// See if all peers have cached path (is so, call can be fast).
bool has_all_peers = _send_confirm_path(from_path, psc, p_to);
// Take chance and set transfer mode, since all send methods will use it.
network_peer->set_transfer_mode(p_unreliable ? NetworkedMultiplayerPeer::TRANSFER_MODE_UNRELIABLE : NetworkedMultiplayerPeer::TRANSFER_MODE_RELIABLE);
if (has_all_peers) {
// They all have verified paths, so send fast.
network_peer->set_target_peer(p_to); // To all of you.
network_peer->put_packet(packet_cache.ptr(), ofs); // A message with love.
} else {
// Not all verified path, so send one by one.
// Append path at the end, since we will need it for some packets.
CharString pname = String(from_path).utf8();
int path_len = encode_cstring(pname.get_data(), nullptr);
MAKE_ROOM(ofs + path_len);
encode_cstring(pname.get_data(), &(packet_cache.write[ofs]));
for (Set<int>::Element *E = connected_peers.front(); E; E = E->next()) {
if (p_to < 0 && E->get() == -p_to) {
continue; // Continue, excluded.
}
if (p_to > 0 && E->get() != p_to) {
continue; // Continue, not for this peer.
}
Map<int, bool>::Element *F = psc->confirmed_peers.find(E->get());
ERR_CONTINUE(!F); // Should never happen.
network_peer->set_target_peer(E->get()); // To this one specifically.
if (F->get()) {
// This one confirmed path, so use id.
encode_uint32(psc->id, &(packet_cache.write[1]));
network_peer->put_packet(packet_cache.ptr(), ofs);
} else {
// This one did not confirm path yet, so use entire path (sorry!).
encode_uint32(0x80000000 | ofs, &(packet_cache.write[1])); // Offset to path and flag.
network_peer->put_packet(packet_cache.ptr(), ofs + path_len);
}
}
}
}
void MultiplayerAPI::_add_peer(int p_id) {
connected_peers.insert(p_id);
path_get_cache.insert(p_id, PathGetCache());
emit_signal("network_peer_connected", p_id);
}
void MultiplayerAPI::_del_peer(int p_id) {
connected_peers.erase(p_id);
// Cleanup get cache.
path_get_cache.erase(p_id);
// Cleanup sent cache.
// Some refactoring is needed to make this faster and do paths GC.
List<NodePath> keys;
path_send_cache.get_key_list(&keys);
for (List<NodePath>::Element *E = keys.front(); E; E = E->next()) {
PathSentCache *psc = path_send_cache.getptr(E->get());
psc->confirmed_peers.erase(p_id);
}
emit_signal("network_peer_disconnected", p_id);
}
void MultiplayerAPI::_connected_to_server() {
emit_signal("connected_to_server");
}
void MultiplayerAPI::_connection_failed() {
emit_signal("connection_failed");
}
void MultiplayerAPI::_server_disconnected() {
emit_signal("server_disconnected");
}
void MultiplayerAPI::rpcp(Node *p_node, int p_peer_id, bool p_unreliable, const StringName &p_method, const Variant **p_arg, int p_argcount) {
ERR_FAIL_COND_MSG(!network_peer.is_valid(), "Trying to call an RPC while no network peer is active.");
ERR_FAIL_COND_MSG(!p_node->is_inside_tree(), "Trying to call an RPC on a node which is not inside SceneTree.");
ERR_FAIL_COND_MSG(network_peer->get_connection_status() != NetworkedMultiplayerPeer::CONNECTION_CONNECTED, "Trying to call an RPC via a network peer which is not connected.");
int node_id = network_peer->get_unique_id();
bool skip_rpc = node_id == p_peer_id;
bool call_local_native = false;
bool call_local_script = false;
bool is_master = p_node->is_network_master();
if (p_peer_id == 0 || p_peer_id == node_id || (p_peer_id < 0 && p_peer_id != -node_id)) {
// Check that send mode can use local call.
const Map<StringName, RPCMode>::Element *E = p_node->get_node_rpc_mode(p_method);
if (E) {
call_local_native = _should_call_local(E->get(), is_master, skip_rpc);
}
if (call_local_native) {
// Done below.
} else if (p_node->get_script_instance()) {
// Attempt with script.
RPCMode rpc_mode = p_node->get_script_instance()->get_rpc_mode(p_method);
call_local_script = _should_call_local(rpc_mode, is_master, skip_rpc);
}
}
if (!skip_rpc) {
#ifdef DEBUG_ENABLED
if (profiling) {
ObjectID id = p_node->get_instance_id();
_init_node_profile(id);
profiler_frame_data[id].outgoing_rpc += 1;
}
#endif
_send_rpc(p_node, p_peer_id, p_unreliable, false, p_method, p_arg, p_argcount);
}
if (call_local_native) {
int temp_id = rpc_sender_id;
rpc_sender_id = get_network_unique_id();
Variant::CallError ce;
p_node->call(p_method, p_arg, p_argcount, ce);
rpc_sender_id = temp_id;
if (ce.error != Variant::CallError::CALL_OK) {
String error = Variant::get_call_error_text(p_node, p_method, p_arg, p_argcount, ce);
error = "rpc() aborted in local call: - " + error + ".";
ERR_PRINT(error);
return;
}
}
if (call_local_script) {
int temp_id = rpc_sender_id;
rpc_sender_id = get_network_unique_id();
Variant::CallError ce;
ce.error = Variant::CallError::CALL_OK;
p_node->get_script_instance()->call(p_method, p_arg, p_argcount, ce);
rpc_sender_id = temp_id;
if (ce.error != Variant::CallError::CALL_OK) {
String error = Variant::get_call_error_text(p_node, p_method, p_arg, p_argcount, ce);
error = "rpc() aborted in script local call: - " + error + ".";
ERR_PRINT(error);
return;
}
}
ERR_FAIL_COND_MSG(skip_rpc && !(call_local_native || call_local_script), "RPC '" + p_method + "' on yourself is not allowed by selected mode.");
}
void MultiplayerAPI::rsetp(Node *p_node, int p_peer_id, bool p_unreliable, const StringName &p_property, const Variant &p_value) {
ERR_FAIL_COND_MSG(!network_peer.is_valid(), "Trying to RSET while no network peer is active.");
ERR_FAIL_COND_MSG(!p_node->is_inside_tree(), "Trying to RSET on a node which is not inside SceneTree.");
ERR_FAIL_COND_MSG(network_peer->get_connection_status() != NetworkedMultiplayerPeer::CONNECTION_CONNECTED, "Trying to send an RSET via a network peer which is not connected.");
int node_id = network_peer->get_unique_id();
bool is_master = p_node->is_network_master();
bool skip_rset = node_id == p_peer_id;
bool set_local = false;
if (p_peer_id == 0 || p_peer_id == node_id || (p_peer_id < 0 && p_peer_id != -node_id)) {
// Check that send mode can use local call.
const Map<StringName, RPCMode>::Element *E = p_node->get_node_rset_mode(p_property);
if (E) {
set_local = _should_call_local(E->get(), is_master, skip_rset);
}
if (set_local) {
bool valid;
int temp_id = rpc_sender_id;
rpc_sender_id = get_network_unique_id();
p_node->set(p_property, p_value, &valid);
rpc_sender_id = temp_id;
if (!valid) {
String error = "rset() aborted in local set, property not found: - " + String(p_property) + ".";
ERR_PRINT(error);
return;
}
} else if (p_node->get_script_instance()) {
// Attempt with script.
RPCMode rpc_mode = p_node->get_script_instance()->get_rset_mode(p_property);
set_local = _should_call_local(rpc_mode, is_master, skip_rset);
if (set_local) {
int temp_id = rpc_sender_id;
rpc_sender_id = get_network_unique_id();
bool valid = p_node->get_script_instance()->set(p_property, p_value);
rpc_sender_id = temp_id;
if (!valid) {
String error = "rset() aborted in local script set, property not found: - " + String(p_property) + ".";
ERR_PRINT(error);
return;
}
}
}
}
if (skip_rset) {
ERR_FAIL_COND_MSG(!set_local, "RSET for '" + p_property + "' on yourself is not allowed by selected mode.");
return;
}
#ifdef DEBUG_ENABLED
if (profiling) {
ObjectID id = p_node->get_instance_id();
_init_node_profile(id);
profiler_frame_data[id].outgoing_rset += 1;
}
#endif
const Variant *vptr = &p_value;
_send_rpc(p_node, p_peer_id, p_unreliable, true, p_property, &vptr, 1);
}
Error MultiplayerAPI::send_bytes(PoolVector<uint8_t> p_data, int p_to, NetworkedMultiplayerPeer::TransferMode p_mode) {
ERR_FAIL_COND_V_MSG(p_data.size() < 1, ERR_INVALID_DATA, "Trying to send an empty raw packet.");
ERR_FAIL_COND_V_MSG(!network_peer.is_valid(), ERR_UNCONFIGURED, "Trying to send a raw packet while no network peer is active.");
ERR_FAIL_COND_V_MSG(network_peer->get_connection_status() != NetworkedMultiplayerPeer::CONNECTION_CONNECTED, ERR_UNCONFIGURED, "Trying to send a raw packet via a network peer which is not connected.");
MAKE_ROOM(p_data.size() + 1);
PoolVector<uint8_t>::Read r = p_data.read();
packet_cache.write[0] = NETWORK_COMMAND_RAW;
memcpy(&packet_cache.write[1], &r[0], p_data.size());
network_peer->set_target_peer(p_to);
network_peer->set_transfer_mode(p_mode);
return network_peer->put_packet(packet_cache.ptr(), p_data.size() + 1);
}
void MultiplayerAPI::_process_raw(int p_from, const uint8_t *p_packet, int p_packet_len) {
ERR_FAIL_COND_MSG(p_packet_len < 2, "Invalid packet received. Size too small.");
PoolVector<uint8_t> out;
int len = p_packet_len - 1;
out.resize(len);
{
PoolVector<uint8_t>::Write w = out.write();
memcpy(&w[0], &p_packet[1], len);
}
emit_signal("network_peer_packet", p_from, out);
}
int MultiplayerAPI::get_network_unique_id() const {
ERR_FAIL_COND_V_MSG(!network_peer.is_valid(), 0, "No network peer is assigned. Unable to get unique network ID.");
return network_peer->get_unique_id();
}
bool MultiplayerAPI::is_network_server() const {
return network_peer.is_valid() && network_peer->is_server();
}
void MultiplayerAPI::set_refuse_new_network_connections(bool p_refuse) {
ERR_FAIL_COND_MSG(!network_peer.is_valid(), "No network peer is assigned. Unable to set 'refuse_new_connections'.");
network_peer->set_refuse_new_connections(p_refuse);
}
bool MultiplayerAPI::is_refusing_new_network_connections() const {
ERR_FAIL_COND_V_MSG(!network_peer.is_valid(), false, "No network peer is assigned. Unable to get 'refuse_new_connections'.");
return network_peer->is_refusing_new_connections();
}
Vector<int> MultiplayerAPI::get_network_connected_peers() const {
ERR_FAIL_COND_V_MSG(!network_peer.is_valid(), Vector<int>(), "No network peer is assigned. Assume no peers are connected.");
Vector<int> ret;
for (Set<int>::Element *E = connected_peers.front(); E; E = E->next()) {
ret.push_back(E->get());
}
return ret;
}
void MultiplayerAPI::set_allow_object_decoding(bool p_enable) {
allow_object_decoding = p_enable;
}
bool MultiplayerAPI::is_object_decoding_allowed() const {
return allow_object_decoding;
}
void MultiplayerAPI::profiling_start() {
#ifdef DEBUG_ENABLED
profiling = true;
profiler_frame_data.clear();
bandwidth_incoming_pointer = 0;
bandwidth_incoming_data.resize(16384); // ~128kB
for (int i = 0; i < bandwidth_incoming_data.size(); ++i) {
bandwidth_incoming_data.write[i].packet_size = -1;
}
bandwidth_outgoing_pointer = 0;
bandwidth_outgoing_data.resize(16384); // ~128kB
for (int i = 0; i < bandwidth_outgoing_data.size(); ++i) {
bandwidth_outgoing_data.write[i].packet_size = -1;
}
#endif
}
void MultiplayerAPI::profiling_end() {
#ifdef DEBUG_ENABLED
profiling = false;
bandwidth_incoming_data.clear();
bandwidth_outgoing_data.clear();
#endif
}
int MultiplayerAPI::get_profiling_frame(ProfilingInfo *r_info) {
int i = 0;
#ifdef DEBUG_ENABLED
for (Map<ObjectID, ProfilingInfo>::Element *E = profiler_frame_data.front(); E; E = E->next()) {
r_info[i] = E->get();
++i;
}
profiler_frame_data.clear();
#endif
return i;
}
int MultiplayerAPI::get_incoming_bandwidth_usage() {
#ifdef DEBUG_ENABLED
return _get_bandwidth_usage(bandwidth_incoming_data, bandwidth_incoming_pointer);
#else
return 0;
#endif
}
int MultiplayerAPI::get_outgoing_bandwidth_usage() {
#ifdef DEBUG_ENABLED
return _get_bandwidth_usage(bandwidth_outgoing_data, bandwidth_outgoing_pointer);
#else
return 0;
#endif
}
#ifdef DEBUG_ENABLED
int MultiplayerAPI::_get_bandwidth_usage(const Vector<BandwidthFrame> &p_buffer, int p_pointer) {
int total_bandwidth = 0;
uint64_t timestamp = OS::get_singleton()->get_ticks_msec();
uint64_t final_timestamp = timestamp - 1000;
int i = (p_pointer + p_buffer.size() - 1) % p_buffer.size();
while (i != p_pointer && p_buffer[i].packet_size > 0) {
if (p_buffer[i].timestamp < final_timestamp) {
return total_bandwidth;
}
total_bandwidth += p_buffer[i].packet_size;
i = (i + p_buffer.size() - 1) % p_buffer.size();
}
ERR_FAIL_COND_V_MSG(i == p_pointer, total_bandwidth, "Reached the end of the bandwidth profiler buffer, values might be inaccurate.");
return total_bandwidth;
}
void MultiplayerAPI::_init_node_profile(ObjectID p_node) {
if (profiler_frame_data.has(p_node)) {
return;
}
profiler_frame_data.insert(p_node, ProfilingInfo());
profiler_frame_data[p_node].node = p_node;
profiler_frame_data[p_node].node_path = Object::cast_to<Node>(ObjectDB::get_instance(p_node))->get_path();
profiler_frame_data[p_node].incoming_rpc = 0;
profiler_frame_data[p_node].incoming_rset = 0;
profiler_frame_data[p_node].outgoing_rpc = 0;
profiler_frame_data[p_node].outgoing_rset = 0;
}
#endif
void MultiplayerAPI::_bind_methods() {
ClassDB::bind_method(D_METHOD("set_root_node", "node"), &MultiplayerAPI::set_root_node);
ClassDB::bind_method(D_METHOD("get_root_node"), &MultiplayerAPI::get_root_node);
ClassDB::bind_method(D_METHOD("send_bytes", "bytes", "id", "mode"), &MultiplayerAPI::send_bytes, DEFVAL(NetworkedMultiplayerPeer::TARGET_PEER_BROADCAST), DEFVAL(NetworkedMultiplayerPeer::TRANSFER_MODE_RELIABLE));
ClassDB::bind_method(D_METHOD("has_network_peer"), &MultiplayerAPI::has_network_peer);
ClassDB::bind_method(D_METHOD("get_network_peer"), &MultiplayerAPI::get_network_peer);
ClassDB::bind_method(D_METHOD("get_network_unique_id"), &MultiplayerAPI::get_network_unique_id);
ClassDB::bind_method(D_METHOD("is_network_server"), &MultiplayerAPI::is_network_server);
ClassDB::bind_method(D_METHOD("get_rpc_sender_id"), &MultiplayerAPI::get_rpc_sender_id);
ClassDB::bind_method(D_METHOD("_add_peer", "id"), &MultiplayerAPI::_add_peer);
ClassDB::bind_method(D_METHOD("_del_peer", "id"), &MultiplayerAPI::_del_peer);
ClassDB::bind_method(D_METHOD("set_network_peer", "peer"), &MultiplayerAPI::set_network_peer);
ClassDB::bind_method(D_METHOD("poll"), &MultiplayerAPI::poll);
ClassDB::bind_method(D_METHOD("clear"), &MultiplayerAPI::clear);
ClassDB::bind_method(D_METHOD("_connected_to_server"), &MultiplayerAPI::_connected_to_server);
ClassDB::bind_method(D_METHOD("_connection_failed"), &MultiplayerAPI::_connection_failed);
ClassDB::bind_method(D_METHOD("_server_disconnected"), &MultiplayerAPI::_server_disconnected);
ClassDB::bind_method(D_METHOD("get_network_connected_peers"), &MultiplayerAPI::get_network_connected_peers);
ClassDB::bind_method(D_METHOD("set_refuse_new_network_connections", "refuse"), &MultiplayerAPI::set_refuse_new_network_connections);
ClassDB::bind_method(D_METHOD("is_refusing_new_network_connections"), &MultiplayerAPI::is_refusing_new_network_connections);
ClassDB::bind_method(D_METHOD("set_allow_object_decoding", "enable"), &MultiplayerAPI::set_allow_object_decoding);
ClassDB::bind_method(D_METHOD("is_object_decoding_allowed"), &MultiplayerAPI::is_object_decoding_allowed);
ADD_PROPERTY(PropertyInfo(Variant::BOOL, "allow_object_decoding"), "set_allow_object_decoding", "is_object_decoding_allowed");
ADD_PROPERTY(PropertyInfo(Variant::BOOL, "refuse_new_network_connections"), "set_refuse_new_network_connections", "is_refusing_new_network_connections");
ADD_PROPERTY(PropertyInfo(Variant::OBJECT, "network_peer", PROPERTY_HINT_RESOURCE_TYPE, "NetworkedMultiplayerPeer", 0), "set_network_peer", "get_network_peer");
ADD_PROPERTY(PropertyInfo(Variant::OBJECT, "root_node", PROPERTY_HINT_RESOURCE_TYPE, "Node", 0), "set_root_node", "get_root_node");
ADD_PROPERTY_DEFAULT("refuse_new_network_connections", false);
ADD_SIGNAL(MethodInfo("network_peer_connected", PropertyInfo(Variant::INT, "id")));
ADD_SIGNAL(MethodInfo("network_peer_disconnected", PropertyInfo(Variant::INT, "id")));
ADD_SIGNAL(MethodInfo("network_peer_packet", PropertyInfo(Variant::INT, "id"), PropertyInfo(Variant::POOL_BYTE_ARRAY, "packet")));
ADD_SIGNAL(MethodInfo("connected_to_server"));
ADD_SIGNAL(MethodInfo("connection_failed"));
ADD_SIGNAL(MethodInfo("server_disconnected"));
BIND_ENUM_CONSTANT(RPC_MODE_DISABLED);
BIND_ENUM_CONSTANT(RPC_MODE_REMOTE);
BIND_ENUM_CONSTANT(RPC_MODE_MASTER);
BIND_ENUM_CONSTANT(RPC_MODE_PUPPET);
BIND_ENUM_CONSTANT(RPC_MODE_SLAVE); // Deprecated.
BIND_ENUM_CONSTANT(RPC_MODE_REMOTESYNC);
BIND_ENUM_CONSTANT(RPC_MODE_SYNC); // Deprecated.
BIND_ENUM_CONSTANT(RPC_MODE_MASTERSYNC);
BIND_ENUM_CONSTANT(RPC_MODE_PUPPETSYNC);
}
MultiplayerAPI::MultiplayerAPI() :
allow_object_decoding(false) {
rpc_sender_id = 0;
root_node = nullptr;
#ifdef DEBUG_ENABLED
profiling = false;
#endif
clear();
}
MultiplayerAPI::~MultiplayerAPI() {
clear();
}
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