148 lines
5.7 KiB
C++
148 lines
5.7 KiB
C++
/*************************************************************************/
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/* socket_helpers.h */
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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) 2007-2017 Juan Linietsky, Ariel Manzur. */
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/* Copyright (c) 2014-2017 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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#ifndef SOCKET_HELPERS_H
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#define SOCKET_HELPERS_H
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#include <string.h>
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#if defined(__MINGW32__) && (!defined(__MINGW64_VERSION_MAJOR) || __MINGW64_VERSION_MAJOR < 4)
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// Workaround for mingw-w64 < 4.0
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#ifndef IPV6_V6ONLY
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#define IPV6_V6ONLY 27
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#endif
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#endif
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// helpers for sockaddr -> IP_Address and back, should work for posix and winsock. All implementations should use this
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static size_t _set_sockaddr(struct sockaddr_storage *p_addr, const IP_Address &p_ip, int p_port, IP::Type p_sock_type = IP::TYPE_ANY) {
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memset(p_addr, 0, sizeof(struct sockaddr_storage));
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ERR_FAIL_COND_V(!p_ip.is_valid(), 0);
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// IPv6 socket
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if (p_sock_type == IP::TYPE_IPV6 || p_sock_type == IP::TYPE_ANY) {
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// IPv6 only socket with IPv4 address
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ERR_FAIL_COND_V(p_sock_type == IP::TYPE_IPV6 && p_ip.is_ipv4(), 0);
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struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)p_addr;
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addr6->sin6_family = AF_INET6;
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addr6->sin6_port = htons(p_port);
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copymem(&addr6->sin6_addr.s6_addr, p_ip.get_ipv6(), 16);
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return sizeof(sockaddr_in6);
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} else { // IPv4 socket
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// IPv4 socket with IPv6 address
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ERR_FAIL_COND_V(!p_ip.is_ipv4(), 0);
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struct sockaddr_in *addr4 = (struct sockaddr_in *)p_addr;
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addr4->sin_family = AF_INET;
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addr4->sin_port = htons(p_port); // short, network byte order
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copymem(&addr4->sin_addr.s_addr, p_ip.get_ipv4(), 16);
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return sizeof(sockaddr_in);
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};
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};
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static size_t _set_listen_sockaddr(struct sockaddr_storage *p_addr, int p_port, IP::Type p_sock_type, const IP_Address p_bind_address) {
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memset(p_addr, 0, sizeof(struct sockaddr_storage));
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if (p_sock_type == IP::TYPE_IPV4) {
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struct sockaddr_in *addr4 = (struct sockaddr_in *)p_addr;
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addr4->sin_family = AF_INET;
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addr4->sin_port = htons(p_port);
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if (p_bind_address.is_valid()) {
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copymem(&addr4->sin_addr.s_addr, p_bind_address.get_ipv4(), 4);
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} else {
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addr4->sin_addr.s_addr = INADDR_ANY;
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}
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return sizeof(sockaddr_in);
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} else {
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struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)p_addr;
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addr6->sin6_family = AF_INET6;
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addr6->sin6_port = htons(p_port);
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if (p_bind_address.is_valid()) {
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copymem(&addr6->sin6_addr.s6_addr, p_bind_address.get_ipv6(), 16);
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} else {
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addr6->sin6_addr = in6addr_any;
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}
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return sizeof(sockaddr_in6);
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};
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};
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static int _socket_create(IP::Type &p_type, int type, int protocol) {
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ERR_FAIL_COND_V(p_type > IP::TYPE_ANY || p_type < IP::TYPE_NONE, ERR_INVALID_PARAMETER);
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int family = p_type == IP::TYPE_IPV4 ? AF_INET : AF_INET6;
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int sockfd = socket(family, type, protocol);
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if (sockfd == -1 && p_type == IP::TYPE_ANY) {
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// Careful here, changing the referenced parameter so the caller knows that we are using an IPv4 socket
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// in place of a dual stack one, and further calls to _set_sock_addr will work as expected.
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p_type = IP::TYPE_IPV4;
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family = AF_INET;
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sockfd = socket(family, type, protocol);
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}
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ERR_FAIL_COND_V(sockfd == -1, -1);
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if (family == AF_INET6) {
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// Select IPv4 over IPv6 mapping
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int opt = p_type != IP::TYPE_ANY;
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if (setsockopt(sockfd, IPPROTO_IPV6, IPV6_V6ONLY, (const char *)&opt, sizeof(opt)) != 0) {
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WARN_PRINT("Unable to set/unset IPv4 address mapping over IPv6");
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}
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}
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return sockfd;
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}
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static void _set_ip_addr_port(IP_Address &r_ip, int &r_port, struct sockaddr_storage *p_addr) {
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if (p_addr->ss_family == AF_INET) {
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struct sockaddr_in *addr4 = (struct sockaddr_in *)p_addr;
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r_ip.set_ipv4((uint8_t *)&(addr4->sin_addr.s_addr));
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r_port = ntohs(addr4->sin_port);
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} else if (p_addr->ss_family == AF_INET6) {
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struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)p_addr;
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r_ip.set_ipv6(addr6->sin6_addr.s6_addr);
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r_port = ntohs(addr6->sin6_port);
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};
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};
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#endif
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