mirror of
https://github.com/PretendoNetwork/Inkay.git
synced 2026-08-18 11:37:02 +02:00
76 lines
2.6 KiB
C++
76 lines
2.6 KiB
C++
/* Copyright 2024 Pretendo Network contributors <pretendo.network>
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Copyright 2024 Ash Logan <ash@heyquark.com>
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <netdb.h>
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#include "config.h"
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#include "utils/logger.h"
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#include "inkay_config.h"
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#include <array>
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#include <vector>
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#include <function_patcher/function_patching.h>
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std::vector<PatchedFunctionHandle> dns_patches;
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constexpr std::pair<const char *, const char *> dns_replacements[] = {
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// NNCS servers
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{ "nncs1.app.nintendowifi.net", "nncs1.app." NETWORK_BASEURL },
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{ "nncs2.app.nintendowifi.net", "nncs2.app." NETWORK_BASEURL },
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};
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static const char * replace_dns_name(const char *dns_name) {
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if (!Config::connect_to_network) return dns_name;
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for (auto [original, replacement] : dns_replacements) {
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if (strcmp(original, dns_name) == 0)
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return replacement;
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}
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return dns_name;
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}
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DECL_FUNCTION(struct hostent *, gethostbyname, const char *dns_name) {
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return real_gethostbyname(replace_dns_name(dns_name));
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}
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DECL_FUNCTION(int, getaddrinfo, const char *node, const char *service, const struct addrinfo *hints, struct addrinfo **res) {
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return real_getaddrinfo(replace_dns_name(node), service, hints, res);
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}
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void patchDNS() {
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dns_patches.reserve(2);
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auto add_patch = [](function_replacement_data_t repl, const char *name) {
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PatchedFunctionHandle handle = 0;
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if (FunctionPatcher_AddFunctionPatch(&repl, &handle, nullptr) != FUNCTION_PATCHER_RESULT_SUCCESS) {
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DEBUG_FUNCTION_LINE("Inkay/DNS: Failed to patch %s!", name);
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}
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dns_patches.push_back(handle);
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};
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// might need a REPLACE_FUNCTION_FOR_PROCESS for Friends
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add_patch(REPLACE_FUNCTION(gethostbyname, LIBRARY_NSYSNET, gethostbyname), "gethostbyname");
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add_patch(REPLACE_FUNCTION(getaddrinfo, LIBRARY_NSYSNET, getaddrinfo), "getaddrinfo");
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}
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void unpatchDNS() {
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for (auto handle: dns_patches) {
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FunctionPatcher_RemoveFunctionPatch(handle);
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}
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dns_patches.clear();
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}
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