[Net] Split Unix/Windows IP implementation

1 files changed, 164 insertions, 0 deletions

diff --git a/drivers/windows/ip_windows.cpp b/drivers/windows/ip_windows.cpp
new file mode 100644
index 0000000000..4ff368d3f4
--- /dev/null
+++ b/drivers/windows/ip_windows.cpp
@@ -0,0 +1,164 @@
+/**************************************************************************/
+/*  ip_windows.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.                 */
+/**************************************************************************/
+
+#if defined(WINDOWS_ENABLED)
+
+#include "ip_windows.h"
+
+#define WIN32_LEAN_AND_MEAN
+#include <windows.h>
+#include <winsock2.h>
+#include <ws2tcpip.h>
+
+#include <iphlpapi.h>
+
+#include <stdio.h>
+
+#include <string.h>
+
+static IPAddress _sockaddr2ip(struct sockaddr *p_addr) {
+	IPAddress ip;
+
+	if (p_addr->sa_family == AF_INET) {
+		struct sockaddr_in *addr = (struct sockaddr_in *)p_addr;
+		ip.set_ipv4((uint8_t *)&(addr->sin_addr));
+	} else if (p_addr->sa_family == AF_INET6) {
+		struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)p_addr;
+		ip.set_ipv6(addr6->sin6_addr.s6_addr);
+	}
+
+	return ip;
+}
+
+void IPWindows::_resolve_hostname(List<IPAddress> &r_addresses, const String &p_hostname, Type p_type) const {
+	struct addrinfo hints;
+	struct addrinfo *result = nullptr;
+
+	memset(&hints, 0, sizeof(struct addrinfo));
+	if (p_type == TYPE_IPV4) {
+		hints.ai_family = AF_INET;
+	} else if (p_type == TYPE_IPV6) {
+		hints.ai_family = AF_INET6;
+		hints.ai_flags = 0;
+	} else {
+		hints.ai_family = AF_UNSPEC;
+		hints.ai_flags = AI_ADDRCONFIG;
+	}
+	hints.ai_flags &= ~AI_NUMERICHOST;
+
+	int s = getaddrinfo(p_hostname.utf8().get_data(), nullptr, &hints, &result);
+	if (s != 0) {
+		print_verbose("getaddrinfo failed! Cannot resolve hostname.");
+		return;
+	}
+
+	if (result == nullptr || result->ai_addr == nullptr) {
+		print_verbose("Invalid response from getaddrinfo.");
+		if (result) {
+			freeaddrinfo(result);
+		}
+		return;
+	}
+
+	struct addrinfo *next = result;
+
+	do {
+		if (next->ai_addr == nullptr) {
+			next = next->ai_next;
+			continue;
+		}
+		IPAddress ip = _sockaddr2ip(next->ai_addr);
+		if (ip.is_valid() && !r_addresses.find(ip)) {
+			r_addresses.push_back(ip);
+		}
+		next = next->ai_next;
+	} while (next);
+
+	freeaddrinfo(result);
+}
+
+void IPWindows::get_local_interfaces(HashMap<String, Interface_Info> *r_interfaces) const {
+	ULONG buf_size = 1024;
+	IP_ADAPTER_ADDRESSES *addrs;
+
+	while (true) {
+		addrs = (IP_ADAPTER_ADDRESSES *)memalloc(buf_size);
+		int err = GetAdaptersAddresses(AF_UNSPEC, GAA_FLAG_SKIP_ANYCAST | GAA_FLAG_SKIP_MULTICAST | GAA_FLAG_SKIP_DNS_SERVER | GAA_FLAG_SKIP_FRIENDLY_NAME,
+				nullptr, addrs, &buf_size);
+		if (err == NO_ERROR) {
+			break;
+		}
+		memfree(addrs);
+		if (err == ERROR_BUFFER_OVERFLOW) {
+			continue; // Will go back and alloc the right size.
+		}
+
+		ERR_FAIL_MSG("Call to GetAdaptersAddresses failed with error " + itos(err) + ".");
+	}
+
+	IP_ADAPTER_ADDRESSES *adapter = addrs;
+
+	while (adapter != nullptr) {
+		Interface_Info info;
+		info.name = adapter->AdapterName;
+		info.name_friendly = adapter->FriendlyName;
+		info.index = String::num_uint64(adapter->IfIndex);
+
+		IP_ADAPTER_UNICAST_ADDRESS *address = adapter->FirstUnicastAddress;
+		while (address != nullptr) {
+			int family = address->Address.lpSockaddr->sa_family;
+			if (family != AF_INET && family != AF_INET6) {
+				continue;
+			}
+			info.ip_addresses.push_front(_sockaddr2ip(address->Address.lpSockaddr));
+			address = address->Next;
+		}
+		adapter = adapter->Next;
+		// Only add interface if it has at least one IP.
+		if (info.ip_addresses.size() > 0) {
+			r_interfaces->insert(info.name, info);
+		}
+	}
+
+	memfree(addrs);
+}
+
+void IPWindows::make_default() {
+	_create = _create_unix;
+}
+
+IP *IPWindows::_create_unix() {
+	return memnew(IPWindows);
+}
+
+IPWindows::IPWindows() {
+}
+
+#endif // WINDOWS_ENABLED