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dns: skeleton passthrough mitm

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This commit is contained in:
Michael Scire 2021-01-30 13:11:39 -08:00
parent a28c60970f
commit 45709aa9cd
10 changed files with 415 additions and 0 deletions
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3
libraries/libstratosphere/include/stratosphere/ams/impl/ams_system_thread_definitions.hpp
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@ -113,6 +113,9 @@ namespace ams::impl {
AMS_DEFINE_SYSTEM_THREAD(21, erpt, Main);
AMS_DEFINE_SYSTEM_THREAD(21, erpt, IpcServer);
/* socket. */
AMS_DEFINE_SYSTEM_THREAD(29, socket, ResolverIpcServer);
/* jpegdec. */
AMS_DEFINE_SYSTEM_THREAD(21, jpegdec, Main);

17
libraries/libstratosphere/include/stratosphere/socket.hpp Normal file
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@ -0,0 +1,17 @@
/*
* Copyright (c) 2018-2020 Atmosphère-NX
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#pragma once
#include <stratosphere/socket/socket_types.hpp>

65
libraries/libstratosphere/include/stratosphere/socket/socket_types.hpp Normal file
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@ -0,0 +1,65 @@
/*
* Copyright (c) 2018-2020 Atmosphère-NX
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#pragma once
#include <vapours.hpp>
namespace ams::socket {
using InAddrT = u32;
using InPortT = u16;
using SockLenT = u32;
using NfdsT = u64;
using FdMask = u64;
constexpr inline unsigned int FdSetSize = 0x400;
template<u32 A, u32 B, u32 C, u32 D>
constexpr inline InAddrT EncodeInAddr = (A << 24) | (B << 16) | (C << 8) | (D << 0);
constexpr inline InAddrT InAddr_Any = EncodeInAddr< 0, 0, 0, 0>;
constexpr inline InAddrT InAddr_Broadcast = EncodeInAddr<255, 255, 255, 255>;
constexpr inline InAddrT InAddr_None = EncodeInAddr<255, 255, 255, 255>;
constexpr inline InAddrT InAddr_Loopback = EncodeInAddr<127, 0, 0, 1>;
enum class Family : u8 {
Af_Unspec = 0,
Pf_Unspec = Af_Unspec,
Af_Inet = 2,
Pf_Inet = Af_Inet,
Af_Route = 17,
Pf_Route = Af_Route,
Af_Link = 18,
Pf_Link = Af_Link,
Af_Inet6 = 28,
Pf_Inet6 = Af_Inet6,
Af_Max = 42,
Pf_Max = Af_Max
};
struct HostEnt {
char *h_name;
char **h_aliases;
Family h_addrtype;
int h_length;
char **h_addr_list;
};
}

3
stratosphere/ams_mitm/source/amsmitm_module_management.cpp
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@ -22,6 +22,7 @@
#include "bpc_mitm/bpcmitm_module.hpp"
#include "bpc_mitm/bpc_ams_module.hpp"
#include "ns_mitm/nsmitm_module.hpp"
#include "dns_mitm/dnsmitm_module.hpp"
#include "sysupdater/sysupdater_module.hpp"
namespace ams::mitm {
@ -34,6 +35,7 @@ namespace ams::mitm {
ModuleId_BpcMitm,
ModuleId_BpcAms,
ModuleId_NsMitm,
ModuleId_DnsMitm,
ModuleId_Sysupdater,
ModuleId_Count,
@ -66,6 +68,7 @@ namespace ams::mitm {
GetModuleDefinition<bpc::MitmModule>(),
GetModuleDefinition<bpc_ams::MitmModule>(),
GetModuleDefinition<ns::MitmModule>(),
GetModuleDefinition<socket::resolver::MitmModule>(),
GetModuleDefinition<sysupdater::MitmModule>(),
};

76
stratosphere/ams_mitm/source/dns_mitm/dnsmitm_debug.cpp Normal file
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@ -0,0 +1,76 @@
/*
* Copyright (c) 2018-2020 Atmosphère-NX
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <stratosphere.hpp>
#include "../amsmitm_fs_utils.hpp"
#include "dnsmitm_debug.hpp"
namespace ams::mitm::socket::resolver {
#if 1
namespace {
::FsFile g_log_file;
s64 g_log_ofs;
os::SdkMutex g_log_mutex;
char g_log_buf[0x400];
}
void InitializeDebug() {
/* Create the log file. */
mitm::fs::CreateAtmosphereSdFile("dns_log.txt", 0, ams::fs::CreateOption_None);
/* Open the log file. */
R_ABORT_UNLESS(mitm::fs::OpenAtmosphereSdFile(std::addressof(g_log_file), "dns_log.txt", ams::fs::OpenMode_ReadWrite | ams::fs::OpenMode_AllowAppend));
/* Get the current log offset. */
R_ABORT_UNLESS(::fsFileGetSize(std::addressof(g_log_file), std::addressof(g_log_ofs)));
/* Start a new log. */
LogDebug("\n---\n");
}
void LogDebug(const char *fmt, ...) {
std::scoped_lock lk(g_log_mutex);
int len = 0;
{
std::va_list vl;
va_start(vl, fmt);
len = util::VSNPrintf(g_log_buf, sizeof(g_log_buf), fmt, vl);
va_end(vl);
}
R_ABORT_UNLESS(::fsFileWrite(std::addressof(g_log_file), g_log_ofs, g_log_buf, len, FsWriteOption_Flush));
g_log_ofs += len;
}
#else
void InitializeDebug() {
/* ... */
}
void LogDebug(const char *fmt, ...) {
/* ... */
}
#endif
}

25
stratosphere/ams_mitm/source/dns_mitm/dnsmitm_debug.hpp Normal file
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@ -0,0 +1,25 @@
/*
* Copyright (c) 2018-2020 Atmosphère-NX
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#pragma once
#include <stratosphere.hpp>
namespace ams::mitm::socket::resolver {
void InitializeDebug();
void LogDebug(const char *fmt, ...) __attribute__((format(printf, 1, 2)));
}

112
stratosphere/ams_mitm/source/dns_mitm/dnsmitm_module.cpp Normal file
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@ -0,0 +1,112 @@
/*
* Copyright (c) 2018-2020 Atmosphère-NX
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <stratosphere.hpp>
#include "../amsmitm_initialization.hpp"
#include "dnsmitm_module.hpp"
#include "dnsmitm_resolver_impl.hpp"
#include "dnsmitm_debug.hpp"
namespace ams::mitm::socket::resolver {
namespace {
enum PortIndex {
PortIndex_Mitm,
PortIndex_Count,
};
constexpr sm::ServiceName DnsMitmServiceName = sm::ServiceName::Encode("sfdnsres");
constexpr size_t MaxSessions = 30;
using ServerOptions = sf::hipc::DefaultServerManagerOptions;
class ServerManager final : public sf::hipc::ServerManager<PortIndex_Count, ServerOptions, MaxSessions> {
private:
virtual Result OnNeedsToAccept(int port_index, Server *server) override;
};
ServerManager g_server_manager;
Result ServerManager::OnNeedsToAccept(int port_index, Server *server) {
/* Acknowledge the mitm session. */
std::shared_ptr<::Service> fsrv;
sm::MitmProcessInfo client_info;
server->AcknowledgeMitmSession(std::addressof(fsrv), std::addressof(client_info));
switch (port_index) {
case PortIndex_Mitm:
return this->AcceptMitmImpl(server, sf::CreateSharedObjectEmplaced<IResolver, ResolverImpl>(decltype(fsrv)(fsrv), client_info), fsrv);
AMS_UNREACHABLE_DEFAULT_CASE();
}
}
constexpr size_t TotalThreads = 8;
static_assert(TotalThreads >= 1, "TotalThreads");
constexpr size_t NumExtraThreads = TotalThreads - 1;
constexpr size_t ThreadStackSize = mitm::ModuleTraits<socket::resolver::MitmModule>::StackSize;
alignas(os::MemoryPageSize) u8 g_extra_thread_stacks[NumExtraThreads][ThreadStackSize];
os::ThreadType g_extra_threads[NumExtraThreads];
void LoopServerThread(void *arg) {
/* Loop forever, servicing our services. */
g_server_manager.LoopProcess();
}
void ProcessForServerOnAllThreads() {
/* Initialize threads. */
if constexpr (NumExtraThreads > 0) {
const s32 priority = os::GetThreadCurrentPriority(os::GetCurrentThread());
for (size_t i = 0; i < NumExtraThreads; i++) {
R_ABORT_UNLESS(os::CreateThread(g_extra_threads + i, LoopServerThread, nullptr, g_extra_thread_stacks[i], ThreadStackSize, priority));
}
}
/* Start extra threads. */
if constexpr (NumExtraThreads > 0) {
for (size_t i = 0; i < NumExtraThreads; i++) {
os::StartThread(g_extra_threads + i);
}
}
/* Loop this thread. */
LoopServerThread(nullptr);
/* Wait for extra threads to finish. */
if constexpr (NumExtraThreads > 0) {
for (size_t i = 0; i < NumExtraThreads; i++) {
os::WaitThread(g_extra_threads + i);
}
}
}
}
void MitmModule::ThreadFunction(void *arg) {
/* Wait until initialization is complete. */
mitm::WaitInitialized();
/* Initialize debug. */
resolver::InitializeDebug();
/* Create mitm servers. */
R_ABORT_UNLESS((g_server_manager.RegisterMitmServer<ResolverImpl>(PortIndex_Mitm, DnsMitmServiceName)));
/* Loop forever, servicing our services. */
ProcessForServerOnAllThreads();
}
}

24
stratosphere/ams_mitm/source/dns_mitm/dnsmitm_module.hpp Normal file
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@ -0,0 +1,24 @@
/*
* Copyright (c) 2018-2020 Atmosphère-NX
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#pragma once
#include <stratosphere.hpp>
#include "../amsmitm_module.hpp"
namespace ams::mitm::socket::resolver {
DEFINE_MITM_MODULE_CLASS(0x2000, AMS_GET_SYSTEM_THREAD_PRIORITY(socket, ResolverIpcServer) - 1);
}

42
stratosphere/ams_mitm/source/dns_mitm/dnsmitm_resolver_impl.cpp Normal file
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@ -0,0 +1,42 @@
/*
* Copyright (c) 2018-2020 Atmosphère-NX
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <stratosphere.hpp>
#include "dnsmitm_resolver_impl.hpp"
#include "dnsmitm_debug.hpp"
namespace ams::mitm::socket::resolver {
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) {
LogDebug("[%016lx]: GetHostByNameRequest(%s)\n", this->client_info.program_id.value, reinterpret_cast<const char *>(name.GetPointer()));
return sm::mitm::ResultShouldForwardToSession();
}
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) {
LogDebug("[%016lx]: GetAddrInfoRequest(%s, %s)\n", this->client_info.program_id.value, reinterpret_cast<const char *>(node.GetPointer()), reinterpret_cast<const char *>(srv.GetPointer()));
return sm::mitm::ResultShouldForwardToSession();
}
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) {
LogDebug("[%016lx]: GetHostByNameRequestWithOptions(%s)\n", this->client_info.program_id.value, reinterpret_cast<const char *>(name.GetPointer()));
return sm::mitm::ResultShouldForwardToSession();
}
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) {
LogDebug("[%016lx]: GetAddrInfoRequestWithOptions(%s, %s)\n", this->client_info.program_id.value, reinterpret_cast<const char *>(node.GetPointer()), reinterpret_cast<const char *>(srv.GetPointer()));
return sm::mitm::ResultShouldForwardToSession();
}
}

48
stratosphere/ams_mitm/source/dns_mitm/dnsmitm_resolver_impl.hpp Normal file
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@ -0,0 +1,48 @@
/*
* Copyright (c) 2018-2020 Atmosphère-NX
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#pragma once
#include <stratosphere.hpp>
#define AMS_DNS_MITM_INTERFACE_INFO(C, H) \
AMS_SF_METHOD_INFO(C, H, 2, Result, 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), (cancel_handle, client_pid, use_nsd_resolve, name, out_host_error, out_errno, out_hostent, out_size)) \
AMS_SF_METHOD_INFO(C, H, 6, Result, 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), (cancel_handle, client_pid, use_nsd_resolve, node, srv, serialized_hint, out_addrinfo, out_errno, out_retval, out_size)) \
AMS_SF_METHOD_INFO(C, H, 10, Result, 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), (client_pid, name, out_hostent, out_size, options_version, options, num_options, out_host_error, out_errno), hos::Version_5_0_0) \
AMS_SF_METHOD_INFO(C, H, 12, Result, 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), (client_pid, node, srv, serialized_hint, out_addrinfo, out_size, out_retval, options_version, options, num_options, out_host_error, out_errno), hos::Version_5_0_0)
AMS_SF_DEFINE_MITM_INTERFACE(ams::mitm::socket::resolver, IResolver, AMS_DNS_MITM_INTERFACE_INFO)
namespace ams::mitm::socket::resolver {
class ResolverImpl : public sf::MitmServiceImplBase {
public:
using MitmServiceImplBase::MitmServiceImplBase;
public:
static bool ShouldMitm(const sm::MitmProcessInfo &client_info) {
/* We will mitm:
* - everything.
*/
return true;
}
public:
/* Overridden commands. */
Result 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);
Result 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);
Result 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);
Result 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);
};
static_assert(IsIResolver<ResolverImpl>);
}