mirror of
https://github.com/Atmosphere-NX/Atmosphere.git
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201 lines
9.4 KiB
C++
201 lines
9.4 KiB
C++
/*
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* Copyright (c) 2018-2020 Atmosphère-NX
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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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 <stratosphere.hpp>
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#include "dnsmitm_resolver_impl.hpp"
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#include "dnsmitm_debug.hpp"
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#include "dnsmitm_host_redirection.hpp"
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#include "serializer/serializer.hpp"
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#include "sfdnsres_shim.h"
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namespace ams::mitm::socket::resolver {
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ssize_t SerializeRedirectedHostEnt(u8 * const dst, size_t dst_size, const char *hostname, ams::socket::InAddrT redirect_addr) {
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struct in_addr addr = { .s_addr = redirect_addr };
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struct in_addr *addr_list[2] = { &addr, nullptr };
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struct hostent ent = {
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.h_name = const_cast<char *>(hostname),
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.h_aliases = nullptr,
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.h_addrtype = AF_INET,
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.h_length = sizeof(u32),
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.h_addr_list = (char **)addr_list,
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};
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const auto result = serializer::DNSSerializer::ToBuffer(dst, dst_size, ent);
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AMS_ABORT_UNLESS(result >= 0);
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return result;
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}
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ssize_t SerializeRedirectedAddrInfo(u8 * const dst, size_t dst_size, const char *hostname, ams::socket::InAddrT redirect_addr, u16 redirect_port, const struct addrinfo *hint) {
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struct addrinfo ai = {
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.ai_flags = 0,
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.ai_family = AF_UNSPEC,
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.ai_socktype = 0,
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.ai_protocol = 0,
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.ai_addrlen = 0,
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.ai_canonname = nullptr,
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.ai_next = nullptr,
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};
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if (hint != nullptr) {
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ai = *hint;
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}
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switch (ai.ai_family) {
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case AF_UNSPEC: ai.ai_family = AF_INET; break;
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case AF_INET: ai.ai_family = AF_INET; break;
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case AF_INET6: AMS_ABORT("Redirected INET6 not supported"); break;
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AMS_UNREACHABLE_DEFAULT_CASE();
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}
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if (ai.ai_socktype == 0) {
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ai.ai_socktype = SOCK_STREAM;
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}
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if (ai.ai_protocol == 0) {
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ai.ai_protocol = IPPROTO_TCP;
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}
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const struct sockaddr_in sin = {
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.sin_family = AF_INET,
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.sin_port = ams::socket::InetHtons(redirect_port),
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.sin_addr = { .s_addr = redirect_addr },
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.sin_zero = {},
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};
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ai.ai_addrlen = sizeof(sin);
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ai.ai_addr = (struct sockaddr *)(std::addressof(sin));
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const auto result = serializer::DNSSerializer::ToBuffer(dst, dst_size, ai);
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AMS_ABORT_UNLESS(result >= 0);
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return result;
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}
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Result ResolverImpl::GetHostByNameRequest(u32 cancel_handle, const sf::ClientProcessId &client_pid, bool use_nsd_resolve, const sf::InBuffer &name, sf::Out<u32> out_host_error, sf::Out<u32> out_errno, const sf::OutBuffer &out_hostent, sf::Out<u32> out_size) {
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const char *hostname = reinterpret_cast<const char *>(name.GetPointer());
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LogDebug("[%016lx]: GetHostByNameRequest(%s)\n", this->client_info.program_id.value, hostname);
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ams::socket::InAddrT redirect_addr = {};
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R_UNLESS(GetRedirectedHostByName(std::addressof(redirect_addr), hostname), sm::mitm::ResultShouldForwardToSession());
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LogDebug("[%016lx]: Redirecting %s to %u.%u.%u.%u\n", this->client_info.program_id.value, hostname, (redirect_addr >> 0) & 0xFF, (redirect_addr >> 8) & 0xFF, (redirect_addr >> 16) & 0xFF, (redirect_addr >> 24) & 0xFF);
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const auto size = SerializeRedirectedHostEnt(out_hostent.GetPointer(), out_hostent.GetSize(), hostname, redirect_addr);
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*out_host_error = 0;
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*out_errno = 0;
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*out_size = size;
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return ResultSuccess();
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}
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Result ResolverImpl::GetAddrInfoRequest(u32 cancel_handle, const sf::ClientProcessId &client_pid, bool use_nsd_resolve, const sf::InBuffer &node, const sf::InBuffer &srv, const sf::InBuffer &serialized_hint, const sf::OutBuffer &out_addrinfo, sf::Out<u32> out_errno, sf::Out<s32> out_retval, sf::Out<u32> out_size) {
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const char *hostname = reinterpret_cast<const char *>(node.GetPointer());
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LogDebug("[%016lx]: GetAddrInfoRequest(%s, %s)\n", this->client_info.program_id.value, reinterpret_cast<const char *>(node.GetPointer()), reinterpret_cast<const char *>(srv.GetPointer()));
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ams::socket::InAddrT redirect_addr = {};
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R_UNLESS(GetRedirectedHostByName(std::addressof(redirect_addr), hostname), sm::mitm::ResultShouldForwardToSession());
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u16 port = 0;
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if (srv.GetPointer() != nullptr) {
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for (const char *cur = reinterpret_cast<const char *>(srv.GetPointer()); *cur != 0; ++cur) {
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AMS_ABORT_UNLESS(std::isdigit(static_cast<unsigned char>(*cur)));
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port *= 10;
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port += *cur - '0';
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}
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}
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LogDebug("[%016lx]: Redirecting %s:%u to %u.%u.%u.%u\n", this->client_info.program_id.value, hostname, port, (redirect_addr >> 0) & 0xFF, (redirect_addr >> 8) & 0xFF, (redirect_addr >> 16) & 0xFF, (redirect_addr >> 24) & 0xFF);
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const bool use_hint = serialized_hint.GetPointer() != nullptr;
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struct addrinfo hint = {};
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if (use_hint) {
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AMS_ABORT_UNLESS(serializer::DNSSerializer::FromBuffer(hint, serialized_hint.GetPointer(), serialized_hint.GetSize()) >= 0);
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}
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ON_SCOPE_EXIT { if (use_hint) { serializer::FreeAddrInfo(hint); } };
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const auto size = SerializeRedirectedAddrInfo(out_addrinfo.GetPointer(), out_addrinfo.GetSize(), hostname, redirect_addr, port, use_hint ? std::addressof(hint) : nullptr);
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*out_retval = 0;
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*out_errno = 0;
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*out_size = size;
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return ResultSuccess();
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}
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Result ResolverImpl::GetHostByNameRequestWithOptions(const sf::ClientProcessId &client_pid, const sf::InAutoSelectBuffer &name, const sf::OutAutoSelectBuffer &out_hostent, sf::Out<u32> out_size, u32 options_version, const sf::InAutoSelectBuffer &options, u32 num_options, sf::Out<s32> out_host_error, sf::Out<s32> out_errno) {
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const char *hostname = reinterpret_cast<const char *>(name.GetPointer());
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LogDebug("[%016lx]: GetHostByNameRequestWithOptions(%s)\n", this->client_info.program_id.value, hostname);
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ams::socket::InAddrT redirect_addr = {};
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R_UNLESS(GetRedirectedHostByName(std::addressof(redirect_addr), hostname), sm::mitm::ResultShouldForwardToSession());
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LogDebug("[%016lx]: Redirecting %s to %u.%u.%u.%u\n", this->client_info.program_id.value, hostname, (redirect_addr >> 0) & 0xFF, (redirect_addr >> 8) & 0xFF, (redirect_addr >> 16) & 0xFF, (redirect_addr >> 24) & 0xFF);
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const auto size = SerializeRedirectedHostEnt(out_hostent.GetPointer(), out_hostent.GetSize(), hostname, redirect_addr);
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*out_host_error = 0;
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*out_errno = 0;
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*out_size = size;
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return ResultSuccess();
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}
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Result ResolverImpl::GetAddrInfoRequestWithOptions(const sf::ClientProcessId &client_pid, const sf::InBuffer &node, const sf::InBuffer &srv, const sf::InBuffer &serialized_hint, const sf::OutAutoSelectBuffer &out_addrinfo, sf::Out<u32> out_size, sf::Out<s32> out_retval, u32 options_version, const sf::InAutoSelectBuffer &options, u32 num_options, sf::Out<s32> out_host_error, sf::Out<s32> out_errno) {
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const char *hostname = reinterpret_cast<const char *>(node.GetPointer());
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LogDebug("[%016lx]: GetAddrInfoRequestWithOptions(%s, %s)\n", this->client_info.program_id.value, hostname, reinterpret_cast<const char *>(srv.GetPointer()));
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ams::socket::InAddrT redirect_addr = {};
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R_UNLESS(GetRedirectedHostByName(std::addressof(redirect_addr), hostname), sm::mitm::ResultShouldForwardToSession());
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u16 port = 0;
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if (srv.GetPointer() != nullptr) {
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for (const char *cur = reinterpret_cast<const char *>(srv.GetPointer()); *cur != 0; ++cur) {
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AMS_ABORT_UNLESS(std::isdigit(static_cast<unsigned char>(*cur)));
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port *= 10;
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port += *cur - '0';
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}
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}
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LogDebug("[%016lx]: Redirecting %s:%u to %u.%u.%u.%u\n", this->client_info.program_id.value, hostname, port, (redirect_addr >> 0) & 0xFF, (redirect_addr >> 8) & 0xFF, (redirect_addr >> 16) & 0xFF, (redirect_addr >> 24) & 0xFF);
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const bool use_hint = serialized_hint.GetPointer() != nullptr;
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struct addrinfo hint = {};
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if (use_hint) {
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AMS_ABORT_UNLESS(serializer::DNSSerializer::FromBuffer(hint, serialized_hint.GetPointer(), serialized_hint.GetSize()) >= 0);
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}
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ON_SCOPE_EXIT { if (use_hint) { serializer::FreeAddrInfo(hint); } };
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const auto size = SerializeRedirectedAddrInfo(out_addrinfo.GetPointer(), out_addrinfo.GetSize(), hostname, redirect_addr, port, use_hint ? std::addressof(hint) : nullptr);
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*out_retval = 0;
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*out_host_error = 0;
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*out_errno = 0;
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*out_size = size;
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return ResultSuccess();
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}
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Result ResolverImpl::AtmosphereReloadHostsFile() {
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/* Perform a hosts file reload. */
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InitializeResolverRedirections();
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return ResultSuccess();
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}
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}
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