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Happy new year to the wonderful Godot community! We're starting a new decade with a well-established, non-profit, free and open source game engine, and tons of further improvements in the pipeline from hundreds of contributors. Godot will keep getting better, and we're looking forward to all the games that the community will keep developing and releasing with it.
289 lines
8.6 KiB
C++
289 lines
8.6 KiB
C++
/*************************************************************************/
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/* packet_peer_udp.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) 2007-2020 Juan Linietsky, Ariel Manzur. */
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/* Copyright (c) 2014-2020 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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#include "packet_peer_udp.h"
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#include "core/io/ip.h"
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void PacketPeerUDP::set_blocking_mode(bool p_enable) {
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blocking = p_enable;
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}
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void PacketPeerUDP::set_broadcast_enabled(bool p_enabled) {
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broadcast = p_enabled;
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if (_sock.is_valid() && _sock->is_open())
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_sock->set_broadcasting_enabled(p_enabled);
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}
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Error PacketPeerUDP::join_multicast_group(IP_Address p_multi_address, String p_if_name) {
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ERR_FAIL_COND_V(!_sock.is_valid(), ERR_UNAVAILABLE);
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ERR_FAIL_COND_V(!p_multi_address.is_valid(), ERR_INVALID_PARAMETER);
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if (!_sock->is_open()) {
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IP::Type ip_type = p_multi_address.is_ipv4() ? IP::TYPE_IPV4 : IP::TYPE_IPV6;
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Error err = _sock->open(NetSocket::TYPE_UDP, ip_type);
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ERR_FAIL_COND_V(err != OK, err);
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_sock->set_blocking_enabled(false);
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_sock->set_broadcasting_enabled(broadcast);
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}
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return _sock->join_multicast_group(p_multi_address, p_if_name);
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}
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Error PacketPeerUDP::leave_multicast_group(IP_Address p_multi_address, String p_if_name) {
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ERR_FAIL_COND_V(!_sock.is_valid(), ERR_UNAVAILABLE);
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ERR_FAIL_COND_V(!_sock->is_open(), ERR_UNCONFIGURED);
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return _sock->leave_multicast_group(p_multi_address, p_if_name);
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}
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String PacketPeerUDP::_get_packet_ip() const {
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return get_packet_address();
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}
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Error PacketPeerUDP::_set_dest_address(const String &p_address, int p_port) {
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IP_Address ip;
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if (p_address.is_valid_ip_address()) {
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ip = p_address;
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} else {
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ip = IP::get_singleton()->resolve_hostname(p_address);
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if (!ip.is_valid())
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return ERR_CANT_RESOLVE;
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}
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set_dest_address(ip, p_port);
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return OK;
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}
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int PacketPeerUDP::get_available_packet_count() const {
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// TODO we should deprecate this, and expose poll instead!
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Error err = const_cast<PacketPeerUDP *>(this)->_poll();
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if (err != OK)
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return -1;
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return queue_count;
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}
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Error PacketPeerUDP::get_packet(const uint8_t **r_buffer, int &r_buffer_size) {
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Error err = _poll();
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if (err != OK)
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return err;
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if (queue_count == 0)
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return ERR_UNAVAILABLE;
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uint32_t size = 0;
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uint8_t ipv6[16];
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rb.read(ipv6, 16, true);
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packet_ip.set_ipv6(ipv6);
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rb.read((uint8_t *)&packet_port, 4, true);
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rb.read((uint8_t *)&size, 4, true);
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rb.read(packet_buffer, size, true);
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--queue_count;
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*r_buffer = packet_buffer;
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r_buffer_size = size;
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return OK;
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}
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Error PacketPeerUDP::put_packet(const uint8_t *p_buffer, int p_buffer_size) {
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ERR_FAIL_COND_V(!_sock.is_valid(), ERR_UNAVAILABLE);
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ERR_FAIL_COND_V(!peer_addr.is_valid(), ERR_UNCONFIGURED);
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Error err;
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int sent = -1;
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if (!_sock->is_open()) {
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IP::Type ip_type = peer_addr.is_ipv4() ? IP::TYPE_IPV4 : IP::TYPE_IPV6;
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err = _sock->open(NetSocket::TYPE_UDP, ip_type);
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ERR_FAIL_COND_V(err != OK, err);
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_sock->set_blocking_enabled(false);
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_sock->set_broadcasting_enabled(broadcast);
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}
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do {
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err = _sock->sendto(p_buffer, p_buffer_size, sent, peer_addr, peer_port);
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if (err != OK) {
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if (err != ERR_BUSY)
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return FAILED;
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else if (!blocking)
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return ERR_BUSY;
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// Keep trying to send full packet
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continue;
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}
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return OK;
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} while (sent != p_buffer_size);
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return OK;
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}
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int PacketPeerUDP::get_max_packet_size() const {
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return 512; // uhm maybe not
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}
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Error PacketPeerUDP::listen(int p_port, const IP_Address &p_bind_address, int p_recv_buffer_size) {
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ERR_FAIL_COND_V(!_sock.is_valid(), ERR_UNAVAILABLE);
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ERR_FAIL_COND_V(_sock->is_open(), ERR_ALREADY_IN_USE);
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ERR_FAIL_COND_V(!p_bind_address.is_valid() && !p_bind_address.is_wildcard(), ERR_INVALID_PARAMETER);
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Error err;
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IP::Type ip_type = IP::TYPE_ANY;
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if (p_bind_address.is_valid())
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ip_type = p_bind_address.is_ipv4() ? IP::TYPE_IPV4 : IP::TYPE_IPV6;
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err = _sock->open(NetSocket::TYPE_UDP, ip_type);
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if (err != OK)
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return ERR_CANT_CREATE;
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_sock->set_blocking_enabled(false);
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_sock->set_reuse_address_enabled(true);
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_sock->set_broadcasting_enabled(broadcast);
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err = _sock->bind(p_bind_address, p_port);
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if (err != OK) {
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_sock->close();
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return err;
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}
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rb.resize(nearest_shift(p_recv_buffer_size));
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return OK;
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}
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void PacketPeerUDP::close() {
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if (_sock.is_valid())
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_sock->close();
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rb.resize(16);
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queue_count = 0;
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}
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Error PacketPeerUDP::wait() {
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ERR_FAIL_COND_V(!_sock.is_valid(), ERR_UNAVAILABLE);
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return _sock->poll(NetSocket::POLL_TYPE_IN, -1);
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}
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Error PacketPeerUDP::_poll() {
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ERR_FAIL_COND_V(!_sock.is_valid(), ERR_UNAVAILABLE);
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if (!_sock->is_open()) {
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return FAILED;
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}
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Error err;
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int read;
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IP_Address ip;
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uint16_t port;
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while (true) {
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err = _sock->recvfrom(recv_buffer, sizeof(recv_buffer), read, ip, port);
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if (err != OK) {
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if (err == ERR_BUSY)
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break;
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return FAILED;
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}
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if (rb.space_left() < read + 24) {
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#ifdef TOOLS_ENABLED
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WARN_PRINTS("Buffer full, dropping packets!");
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#endif
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continue;
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}
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uint32_t port32 = port;
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rb.write(ip.get_ipv6(), 16);
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rb.write((uint8_t *)&port32, 4);
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rb.write((uint8_t *)&read, 4);
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rb.write(recv_buffer, read);
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++queue_count;
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}
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return OK;
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}
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bool PacketPeerUDP::is_listening() const {
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return _sock.is_valid() && _sock->is_open();
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}
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IP_Address PacketPeerUDP::get_packet_address() const {
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return packet_ip;
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}
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int PacketPeerUDP::get_packet_port() const {
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return packet_port;
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}
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void PacketPeerUDP::set_dest_address(const IP_Address &p_address, int p_port) {
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peer_addr = p_address;
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peer_port = p_port;
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}
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void PacketPeerUDP::_bind_methods() {
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ClassDB::bind_method(D_METHOD("listen", "port", "bind_address", "recv_buf_size"), &PacketPeerUDP::listen, DEFVAL("*"), DEFVAL(65536));
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ClassDB::bind_method(D_METHOD("close"), &PacketPeerUDP::close);
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ClassDB::bind_method(D_METHOD("wait"), &PacketPeerUDP::wait);
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ClassDB::bind_method(D_METHOD("is_listening"), &PacketPeerUDP::is_listening);
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ClassDB::bind_method(D_METHOD("get_packet_ip"), &PacketPeerUDP::_get_packet_ip);
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ClassDB::bind_method(D_METHOD("get_packet_port"), &PacketPeerUDP::get_packet_port);
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ClassDB::bind_method(D_METHOD("set_dest_address", "host", "port"), &PacketPeerUDP::_set_dest_address);
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ClassDB::bind_method(D_METHOD("set_broadcast_enabled", "enabled"), &PacketPeerUDP::set_broadcast_enabled);
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ClassDB::bind_method(D_METHOD("join_multicast_group", "multicast_address", "interface_name"), &PacketPeerUDP::join_multicast_group);
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ClassDB::bind_method(D_METHOD("leave_multicast_group", "multicast_address", "interface_name"), &PacketPeerUDP::leave_multicast_group);
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}
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PacketPeerUDP::PacketPeerUDP() :
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packet_port(0),
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queue_count(0),
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peer_port(0),
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blocking(true),
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broadcast(false),
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_sock(Ref<NetSocket>(NetSocket::create())) {
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rb.resize(16);
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}
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PacketPeerUDP::~PacketPeerUDP() {
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close();
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}
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