5dc7c920bf
We were reserving 12 bytes from the buffer for ip, port, and length, but since IPv6 introduction we should be reserving 24 (IPv6 are 16 bytes)
286 lines
7.3 KiB
C++
286 lines
7.3 KiB
C++
/*************************************************************************/
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/* packet_peer_udp_posix.cpp */
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/*************************************************************************/
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/* This file is part of: */
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/* GODOT ENGINE */
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/* http://www.godotengine.org */
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/*************************************************************************/
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/* Copyright (c) 2007-2017 Juan Linietsky, Ariel Manzur. */
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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_posix.h"
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#ifdef UNIX_ENABLED
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#include <errno.h>
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#include <unistd.h>
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#include <netdb.h>
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <stdio.h>
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#ifndef NO_FCNTL
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#ifdef __HAIKU__
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#include <fcntl.h>
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#else
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#include <sys/fcntl.h>
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#endif
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#else
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#include <sys/ioctl.h>
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#endif
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#ifdef JAVASCRIPT_ENABLED
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#include <arpa/inet.h>
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#endif
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#include "drivers/unix/socket_helpers.h"
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int PacketPeerUDPPosix::get_available_packet_count() const {
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Error err = const_cast<PacketPeerUDPPosix*>(this)->_poll(false);
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if (err!=OK)
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return 0;
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return queue_count;
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}
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Error PacketPeerUDPPosix::get_packet(const uint8_t **r_buffer,int &r_buffer_size) const{
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Error err = const_cast<PacketPeerUDPPosix*>(this)->_poll(false);
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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;
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uint8_t type;
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rb.read(&type, 1, true);
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if (type == IP::TYPE_IPV4) {
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uint8_t ip[4];
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rb.read(ip,4,true);
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packet_ip.set_ipv4(ip);
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} else {
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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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};
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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 PacketPeerUDPPosix::put_packet(const uint8_t *p_buffer,int p_buffer_size){
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ERR_FAIL_COND_V(!peer_addr.is_valid(), ERR_UNCONFIGURED);
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if (sock_type==IP::TYPE_NONE)
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sock_type = peer_addr.is_ipv4() ? IP::TYPE_IPV4 : IP::TYPE_IPV6;
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int sock = _get_socket();
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ERR_FAIL_COND_V( sock == -1, FAILED );
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struct sockaddr_storage addr;
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size_t addr_size = _set_sockaddr(&addr, peer_addr, peer_port, sock_type);
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errno = 0;
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int err;
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while ( (err = sendto(sock, p_buffer, p_buffer_size, 0, (struct sockaddr*)&addr, addr_size)) != p_buffer_size) {
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if (errno != EAGAIN) {
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return FAILED;
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}
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}
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return OK;
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}
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int PacketPeerUDPPosix::get_max_packet_size() const{
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return 512; // uhm maybe not
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}
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Error PacketPeerUDPPosix::listen(int p_port, IP_Address p_bind_address, int p_recv_buffer_size) {
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ERR_FAIL_COND_V(sockfd!=-1,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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#ifdef __OpenBSD__
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sock_type = IP::TYPE_IPV4; // OpenBSD does not support dual stacking, fallback to IPv4 only.
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#else
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sock_type = IP::TYPE_ANY;
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#endif
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if(p_bind_address.is_valid())
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sock_type = p_bind_address.is_ipv4() ? IP::TYPE_IPV4 : IP::TYPE_IPV6;
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int sock = _get_socket();
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if (sock == -1 )
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return ERR_CANT_CREATE;
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sockaddr_storage addr = {0};
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size_t addr_size = _set_listen_sockaddr(&addr, p_port, sock_type, IP_Address());
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if (bind(sock, (struct sockaddr*)&addr, addr_size) == -1 ) {
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close();
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return ERR_UNAVAILABLE;
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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 PacketPeerUDPPosix::close(){
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if (sockfd != -1)
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::close(sockfd);
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sockfd=-1;
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sock_type = IP::TYPE_NONE;
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rb.resize(16);
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queue_count=0;
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}
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Error PacketPeerUDPPosix::wait() {
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return _poll(true);
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}
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Error PacketPeerUDPPosix::_poll(bool p_wait) {
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if (sockfd==-1) {
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return FAILED;
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}
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struct sockaddr_storage from = {0};
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socklen_t len = sizeof(struct sockaddr_storage);
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int ret;
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while ( (ret = recvfrom(sockfd, recv_buffer, MIN((int)sizeof(recv_buffer),MAX(rb.space_left()-24, 0)), p_wait?0:MSG_DONTWAIT, (struct sockaddr*)&from, &len)) > 0) {
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uint32_t port = 0;
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if (from.ss_family == AF_INET) {
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uint8_t type = (uint8_t)IP::TYPE_IPV4;
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rb.write(&type, 1);
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struct sockaddr_in* sin_from = (struct sockaddr_in*)&from;
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rb.write((uint8_t*)&sin_from->sin_addr, 4);
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port = ntohs(sin_from->sin_port);
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} else if (from.ss_family == AF_INET6) {
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uint8_t type = (uint8_t)IP::TYPE_IPV6;
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rb.write(&type, 1);
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struct sockaddr_in6* s6_from = (struct sockaddr_in6*)&from;
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rb.write((uint8_t*)&s6_from->sin6_addr, 16);
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port = ntohs(s6_from->sin6_port);
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} else {
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// WARN_PRINT("Ignoring packet with unknown address family");
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uint8_t type = (uint8_t)IP::TYPE_NONE;
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rb.write(&type, 1);
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};
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rb.write((uint8_t*)&port, 4);
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rb.write((uint8_t*)&ret, 4);
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rb.write(recv_buffer, ret);
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len = sizeof(struct sockaddr_storage);
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++queue_count;
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};
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// TODO: Should ECONNRESET be handled here?
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if (ret == 0 || (ret == -1 && errno != EAGAIN) ) {
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close();
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return FAILED;
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};
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return OK;
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}
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bool PacketPeerUDPPosix::is_listening() const{
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return sockfd!=-1;
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}
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IP_Address PacketPeerUDPPosix::get_packet_address() const {
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return packet_ip;
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}
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int PacketPeerUDPPosix::get_packet_port() const{
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return packet_port;
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}
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int PacketPeerUDPPosix::_get_socket() {
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ERR_FAIL_COND_V(sock_type==IP::TYPE_NONE, -1);
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if (sockfd != -1)
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return sockfd;
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sockfd = _socket_create(sock_type, SOCK_DGRAM, IPPROTO_UDP);
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return sockfd;
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}
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void PacketPeerUDPPosix::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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PacketPeerUDP* PacketPeerUDPPosix::_create() {
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return memnew(PacketPeerUDPPosix);
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};
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void PacketPeerUDPPosix::make_default() {
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PacketPeerUDP::_create = PacketPeerUDPPosix::_create;
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};
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PacketPeerUDPPosix::PacketPeerUDPPosix() {
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sockfd=-1;
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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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sock_type = IP::TYPE_NONE;
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rb.resize(16);
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}
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PacketPeerUDPPosix::~PacketPeerUDPPosix() {
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close();
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}
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#endif
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