mirror of
https://github.com/godotengine/godot.git
synced 2024-11-27 09:16:35 +08:00
387 lines
12 KiB
C++
387 lines
12 KiB
C++
/**************************************************************************/
|
|
/* packet_peer_udp.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 "packet_peer_udp.h"
|
|
|
|
#include "core/io/ip.h"
|
|
#include "core/io/udp_server.h"
|
|
|
|
void PacketPeerUDP::set_blocking_mode(bool p_enable) {
|
|
blocking = p_enable;
|
|
}
|
|
|
|
void PacketPeerUDP::set_broadcast_enabled(bool p_enabled) {
|
|
ERR_FAIL_COND(udp_server);
|
|
broadcast = p_enabled;
|
|
if (_sock.is_valid() && _sock->is_open()) {
|
|
_sock->set_broadcasting_enabled(p_enabled);
|
|
}
|
|
}
|
|
|
|
Error PacketPeerUDP::join_multicast_group(IPAddress p_multi_address, const String &p_if_name) {
|
|
ERR_FAIL_COND_V(udp_server, ERR_LOCKED);
|
|
ERR_FAIL_COND_V(!_sock.is_valid(), ERR_UNAVAILABLE);
|
|
ERR_FAIL_COND_V(!p_multi_address.is_valid(), ERR_INVALID_PARAMETER);
|
|
|
|
if (!_sock->is_open()) {
|
|
IP::Type ip_type = p_multi_address.is_ipv4() ? IP::TYPE_IPV4 : IP::TYPE_IPV6;
|
|
Error err = _sock->open(NetSocket::TYPE_UDP, ip_type);
|
|
ERR_FAIL_COND_V(err != OK, err);
|
|
_sock->set_blocking_enabled(false);
|
|
_sock->set_broadcasting_enabled(broadcast);
|
|
}
|
|
return _sock->join_multicast_group(p_multi_address, p_if_name);
|
|
}
|
|
|
|
Error PacketPeerUDP::leave_multicast_group(IPAddress p_multi_address, const String &p_if_name) {
|
|
ERR_FAIL_COND_V(udp_server, ERR_LOCKED);
|
|
ERR_FAIL_COND_V(!_sock.is_valid(), ERR_UNAVAILABLE);
|
|
ERR_FAIL_COND_V(!_sock->is_open(), ERR_UNCONFIGURED);
|
|
return _sock->leave_multicast_group(p_multi_address, p_if_name);
|
|
}
|
|
|
|
String PacketPeerUDP::_get_packet_ip() const {
|
|
return get_packet_address();
|
|
}
|
|
|
|
Error PacketPeerUDP::_set_dest_address(const String &p_address, int p_port) {
|
|
IPAddress ip;
|
|
if (p_address.is_valid_ip_address()) {
|
|
ip = p_address;
|
|
} else {
|
|
ip = IP::get_singleton()->resolve_hostname(p_address);
|
|
if (!ip.is_valid()) {
|
|
return ERR_CANT_RESOLVE;
|
|
}
|
|
}
|
|
|
|
set_dest_address(ip, p_port);
|
|
return OK;
|
|
}
|
|
|
|
int PacketPeerUDP::get_available_packet_count() const {
|
|
// TODO we should deprecate this, and expose poll instead!
|
|
Error err = const_cast<PacketPeerUDP *>(this)->_poll();
|
|
if (err != OK) {
|
|
return -1;
|
|
}
|
|
|
|
return queue_count;
|
|
}
|
|
|
|
Error PacketPeerUDP::get_packet(const uint8_t **r_buffer, int &r_buffer_size) {
|
|
Error err = _poll();
|
|
if (err != OK) {
|
|
return err;
|
|
}
|
|
if (queue_count == 0) {
|
|
return ERR_UNAVAILABLE;
|
|
}
|
|
|
|
/* Bogus GCC warning here:
|
|
* In member function 'int RingBuffer<T>::read(T*, int, bool) [with T = unsigned char]',
|
|
* inlined from 'virtual Error PacketPeerUDP::get_packet(const uint8_t**, int&)' at core/io/packet_peer_udp.cpp:112:9,
|
|
* inlined from 'virtual Error PacketPeerUDP::get_packet(const uint8_t**, int&)' at core/io/packet_peer_udp.cpp:99:7:
|
|
* Error: ./core/ring_buffer.h:68:46: error: writing 1 byte into a region of size 0 [-Werror=stringop-overflow=]
|
|
* 68 | p_buf[dst++] = read[pos + i];
|
|
* | ~~~~~~~~~~~~~^~~~~~~
|
|
*/
|
|
#if defined(__GNUC__) && !defined(__clang__)
|
|
#pragma GCC diagnostic push
|
|
#pragma GCC diagnostic warning "-Wstringop-overflow=0"
|
|
#endif
|
|
|
|
uint32_t size = 0;
|
|
uint8_t ipv6[16] = {};
|
|
rb.read(ipv6, 16, true);
|
|
packet_ip.set_ipv6(ipv6);
|
|
rb.read((uint8_t *)&packet_port, 4, true);
|
|
rb.read((uint8_t *)&size, 4, true);
|
|
rb.read(packet_buffer, size, true);
|
|
--queue_count;
|
|
*r_buffer = packet_buffer;
|
|
r_buffer_size = size;
|
|
|
|
#if defined(__GNUC__) && !defined(__clang__)
|
|
#pragma GCC diagnostic pop
|
|
#endif
|
|
|
|
return OK;
|
|
}
|
|
|
|
Error PacketPeerUDP::put_packet(const uint8_t *p_buffer, int p_buffer_size) {
|
|
ERR_FAIL_COND_V(!_sock.is_valid(), ERR_UNAVAILABLE);
|
|
ERR_FAIL_COND_V(!peer_addr.is_valid(), ERR_UNCONFIGURED);
|
|
|
|
Error err;
|
|
int sent = -1;
|
|
|
|
if (!_sock->is_open()) {
|
|
IP::Type ip_type = peer_addr.is_ipv4() ? IP::TYPE_IPV4 : IP::TYPE_IPV6;
|
|
err = _sock->open(NetSocket::TYPE_UDP, ip_type);
|
|
ERR_FAIL_COND_V(err != OK, err);
|
|
_sock->set_blocking_enabled(false);
|
|
_sock->set_broadcasting_enabled(broadcast);
|
|
}
|
|
|
|
do {
|
|
if (connected && !udp_server) {
|
|
err = _sock->send(p_buffer, p_buffer_size, sent);
|
|
} else {
|
|
err = _sock->sendto(p_buffer, p_buffer_size, sent, peer_addr, peer_port);
|
|
}
|
|
if (err != OK) {
|
|
if (err != ERR_BUSY) {
|
|
return FAILED;
|
|
} else if (!blocking) {
|
|
return ERR_BUSY;
|
|
}
|
|
// Keep trying to send full packet
|
|
continue;
|
|
}
|
|
return OK;
|
|
|
|
} while (sent != p_buffer_size);
|
|
|
|
return OK;
|
|
}
|
|
|
|
int PacketPeerUDP::get_max_packet_size() const {
|
|
return 512; // uhm maybe not
|
|
}
|
|
|
|
Error PacketPeerUDP::bind(int p_port, const IPAddress &p_bind_address, int p_recv_buffer_size) {
|
|
ERR_FAIL_COND_V(!_sock.is_valid(), ERR_UNAVAILABLE);
|
|
ERR_FAIL_COND_V(_sock->is_open(), ERR_ALREADY_IN_USE);
|
|
ERR_FAIL_COND_V(!p_bind_address.is_valid() && !p_bind_address.is_wildcard(), ERR_INVALID_PARAMETER);
|
|
ERR_FAIL_COND_V_MSG(p_port < 0 || p_port > 65535, ERR_INVALID_PARAMETER, "The local port number must be between 0 and 65535 (inclusive).");
|
|
|
|
Error err;
|
|
IP::Type ip_type = IP::TYPE_ANY;
|
|
|
|
if (p_bind_address.is_valid()) {
|
|
ip_type = p_bind_address.is_ipv4() ? IP::TYPE_IPV4 : IP::TYPE_IPV6;
|
|
}
|
|
|
|
err = _sock->open(NetSocket::TYPE_UDP, ip_type);
|
|
|
|
if (err != OK) {
|
|
return ERR_CANT_CREATE;
|
|
}
|
|
|
|
_sock->set_blocking_enabled(false);
|
|
_sock->set_broadcasting_enabled(broadcast);
|
|
err = _sock->bind(p_bind_address, p_port);
|
|
|
|
if (err != OK) {
|
|
_sock->close();
|
|
return err;
|
|
}
|
|
rb.resize(nearest_shift(p_recv_buffer_size));
|
|
return OK;
|
|
}
|
|
|
|
Error PacketPeerUDP::connect_shared_socket(Ref<NetSocket> p_sock, IPAddress p_ip, uint16_t p_port, UDPServer *p_server) {
|
|
udp_server = p_server;
|
|
connected = true;
|
|
_sock = p_sock;
|
|
peer_addr = p_ip;
|
|
peer_port = p_port;
|
|
packet_ip = peer_addr;
|
|
packet_port = peer_port;
|
|
return OK;
|
|
}
|
|
|
|
void PacketPeerUDP::disconnect_shared_socket() {
|
|
udp_server = nullptr;
|
|
_sock = Ref<NetSocket>(NetSocket::create());
|
|
close();
|
|
}
|
|
|
|
Error PacketPeerUDP::connect_to_host(const IPAddress &p_host, int p_port) {
|
|
ERR_FAIL_COND_V(udp_server, ERR_LOCKED);
|
|
ERR_FAIL_COND_V(!_sock.is_valid(), ERR_UNAVAILABLE);
|
|
ERR_FAIL_COND_V(!p_host.is_valid(), ERR_INVALID_PARAMETER);
|
|
ERR_FAIL_COND_V_MSG(p_port < 1 || p_port > 65535, ERR_INVALID_PARAMETER, "The remote port number must be between 1 and 65535 (inclusive).");
|
|
|
|
Error err;
|
|
|
|
if (!_sock->is_open()) {
|
|
IP::Type ip_type = p_host.is_ipv4() ? IP::TYPE_IPV4 : IP::TYPE_IPV6;
|
|
err = _sock->open(NetSocket::TYPE_UDP, ip_type);
|
|
ERR_FAIL_COND_V(err != OK, ERR_CANT_OPEN);
|
|
_sock->set_blocking_enabled(false);
|
|
}
|
|
|
|
err = _sock->connect_to_host(p_host, p_port);
|
|
|
|
// I see no reason why we should get ERR_BUSY (wouldblock/eagain) here.
|
|
// This is UDP, so connect is only used to tell the OS to which socket
|
|
// it should deliver packets when multiple are bound on the same address/port.
|
|
if (err != OK) {
|
|
close();
|
|
ERR_FAIL_V_MSG(FAILED, "Unable to connect");
|
|
}
|
|
|
|
connected = true;
|
|
|
|
peer_addr = p_host;
|
|
peer_port = p_port;
|
|
|
|
// Flush any packet we might still have in queue.
|
|
rb.clear();
|
|
return OK;
|
|
}
|
|
|
|
bool PacketPeerUDP::is_socket_connected() const {
|
|
return connected;
|
|
}
|
|
|
|
void PacketPeerUDP::close() {
|
|
if (udp_server) {
|
|
udp_server->remove_peer(peer_addr, peer_port);
|
|
udp_server = nullptr;
|
|
_sock = Ref<NetSocket>(NetSocket::create());
|
|
} else if (_sock.is_valid()) {
|
|
_sock->close();
|
|
}
|
|
rb.resize(16);
|
|
queue_count = 0;
|
|
connected = false;
|
|
}
|
|
|
|
Error PacketPeerUDP::wait() {
|
|
ERR_FAIL_COND_V(!_sock.is_valid(), ERR_UNAVAILABLE);
|
|
return _sock->poll(NetSocket::POLL_TYPE_IN, -1);
|
|
}
|
|
|
|
Error PacketPeerUDP::_poll() {
|
|
ERR_FAIL_COND_V(!_sock.is_valid(), ERR_UNAVAILABLE);
|
|
|
|
if (!_sock->is_open()) {
|
|
return FAILED;
|
|
}
|
|
if (udp_server) {
|
|
return OK; // Handled by UDPServer.
|
|
}
|
|
|
|
Error err;
|
|
int read;
|
|
IPAddress ip;
|
|
uint16_t port;
|
|
|
|
while (true) {
|
|
if (connected) {
|
|
err = _sock->recv(recv_buffer, sizeof(recv_buffer), read);
|
|
ip = peer_addr;
|
|
port = peer_port;
|
|
} else {
|
|
err = _sock->recvfrom(recv_buffer, sizeof(recv_buffer), read, ip, port);
|
|
}
|
|
|
|
if (err != OK) {
|
|
if (err == ERR_BUSY) {
|
|
break;
|
|
}
|
|
return FAILED;
|
|
}
|
|
|
|
err = store_packet(ip, port, recv_buffer, read);
|
|
#ifdef TOOLS_ENABLED
|
|
if (err != OK) {
|
|
WARN_PRINT("Buffer full, dropping packets!");
|
|
}
|
|
#endif
|
|
}
|
|
|
|
return OK;
|
|
}
|
|
|
|
Error PacketPeerUDP::store_packet(IPAddress p_ip, uint32_t p_port, uint8_t *p_buf, int p_buf_size) {
|
|
if (rb.space_left() < p_buf_size + 24) {
|
|
return ERR_OUT_OF_MEMORY;
|
|
}
|
|
rb.write(p_ip.get_ipv6(), 16);
|
|
rb.write((uint8_t *)&p_port, 4);
|
|
rb.write((uint8_t *)&p_buf_size, 4);
|
|
rb.write(p_buf, p_buf_size);
|
|
++queue_count;
|
|
return OK;
|
|
}
|
|
|
|
bool PacketPeerUDP::is_bound() const {
|
|
return _sock.is_valid() && _sock->is_open();
|
|
}
|
|
|
|
IPAddress PacketPeerUDP::get_packet_address() const {
|
|
return packet_ip;
|
|
}
|
|
|
|
int PacketPeerUDP::get_packet_port() const {
|
|
return packet_port;
|
|
}
|
|
|
|
int PacketPeerUDP::get_local_port() const {
|
|
uint16_t local_port;
|
|
_sock->get_socket_address(nullptr, &local_port);
|
|
return local_port;
|
|
}
|
|
|
|
void PacketPeerUDP::set_dest_address(const IPAddress &p_address, int p_port) {
|
|
ERR_FAIL_COND_MSG(connected, "Destination address cannot be set for connected sockets");
|
|
peer_addr = p_address;
|
|
peer_port = p_port;
|
|
}
|
|
|
|
void PacketPeerUDP::_bind_methods() {
|
|
ClassDB::bind_method(D_METHOD("bind", "port", "bind_address", "recv_buf_size"), &PacketPeerUDP::bind, DEFVAL("*"), DEFVAL(65536));
|
|
ClassDB::bind_method(D_METHOD("close"), &PacketPeerUDP::close);
|
|
ClassDB::bind_method(D_METHOD("wait"), &PacketPeerUDP::wait);
|
|
ClassDB::bind_method(D_METHOD("is_bound"), &PacketPeerUDP::is_bound);
|
|
ClassDB::bind_method(D_METHOD("connect_to_host", "host", "port"), &PacketPeerUDP::connect_to_host);
|
|
ClassDB::bind_method(D_METHOD("is_socket_connected"), &PacketPeerUDP::is_socket_connected);
|
|
ClassDB::bind_method(D_METHOD("get_packet_ip"), &PacketPeerUDP::_get_packet_ip);
|
|
ClassDB::bind_method(D_METHOD("get_packet_port"), &PacketPeerUDP::get_packet_port);
|
|
ClassDB::bind_method(D_METHOD("get_local_port"), &PacketPeerUDP::get_local_port);
|
|
ClassDB::bind_method(D_METHOD("set_dest_address", "host", "port"), &PacketPeerUDP::_set_dest_address);
|
|
ClassDB::bind_method(D_METHOD("set_broadcast_enabled", "enabled"), &PacketPeerUDP::set_broadcast_enabled);
|
|
ClassDB::bind_method(D_METHOD("join_multicast_group", "multicast_address", "interface_name"), &PacketPeerUDP::join_multicast_group);
|
|
ClassDB::bind_method(D_METHOD("leave_multicast_group", "multicast_address", "interface_name"), &PacketPeerUDP::leave_multicast_group);
|
|
}
|
|
|
|
PacketPeerUDP::PacketPeerUDP() :
|
|
_sock(Ref<NetSocket>(NetSocket::create())) {
|
|
rb.resize(16);
|
|
}
|
|
|
|
PacketPeerUDP::~PacketPeerUDP() {
|
|
close();
|
|
}
|