mirror of
https://github.com/Atmosphere-NX/Atmosphere.git
synced 2024-11-26 22:02:15 +00:00
960 lines
37 KiB
C++
960 lines
37 KiB
C++
/*
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* Copyright (c) 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 "sm_service_manager.hpp"
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#include "../sm_wait_list.hpp"
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namespace ams::hos {
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void InitializeVersionInternal(bool allow_approximate);
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}
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namespace ams::sm::impl {
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namespace {
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/* Constexpr definitions. */
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static constexpr size_t ProcessCountMax = 0x50;
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static constexpr size_t ServiceCountMax = 0x180;
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static constexpr size_t MitmCountMax = 0x20;
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static constexpr size_t AccessControlSizeMax = 0x200;
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constexpr const sm::ServiceName InitiallyDeferredServices[] = {
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ServiceName::Encode("fsp-srv")
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};
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/* Types. */
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struct ProcessInfo {
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os::ProcessId process_id;
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ncm::ProgramId program_id;
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cfg::OverrideStatus override_status;
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size_t access_control_size;
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u8 access_control[AccessControlSizeMax];
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};
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constexpr const ProcessInfo InvalidProcessInfo = {
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.process_id = os::InvalidProcessId,
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.program_id = ncm::InvalidProgramId,
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.override_status = {},
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.access_control_size = 0,
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.access_control = {},
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};
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struct ServiceInfo {
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ServiceName name;
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os::ProcessId owner_process_id;
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os::NativeHandle port_h;
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bool is_light;
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u8 max_sessions;
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u8 mitm_index;
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};
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struct MitmInfo {
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os::ProcessId process_id;
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os::ProcessId waiting_ack_process_id;
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os::NativeHandle port_h;
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os::NativeHandle query_h;
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os::NativeHandle fwd_sess_h;
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bool waiting_ack;
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};
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constexpr const ServiceInfo InvalidServiceInfo = {
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.name = sm::InvalidServiceName,
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.owner_process_id = os::InvalidProcessId,
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.port_h = os::InvalidNativeHandle,
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.is_light = false,
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.max_sessions = 0,
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.mitm_index = MitmCountMax,
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};
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constexpr const MitmInfo InvalidMitmInfo = {
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.process_id = os::InvalidProcessId,
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.waiting_ack_process_id = os::InvalidProcessId,
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.port_h = os::InvalidNativeHandle,
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.query_h = os::InvalidNativeHandle,
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.fwd_sess_h = os::InvalidNativeHandle,
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.waiting_ack = false,
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};
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class AccessControlEntry {
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private:
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const u8 *m_entry;
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size_t m_capacity;
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public:
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AccessControlEntry(const void *e, size_t c) : m_entry(static_cast<const u8 *>(e)), m_capacity(c) {
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/* ... */
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}
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AccessControlEntry GetNextEntry() const {
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return AccessControlEntry(m_entry + this->GetSize(), m_capacity - this->GetSize());
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}
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size_t GetSize() const {
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return this->GetServiceNameSize() + 1;
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}
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size_t GetServiceNameSize() const {
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return (m_entry[0] & 7) + 1;
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}
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ServiceName GetServiceName() const {
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return ServiceName::Encode(reinterpret_cast<const char *>(m_entry + 1), this->GetServiceNameSize());
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}
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bool IsHost() const {
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return (m_entry[0] & 0x80) != 0;
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}
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bool IsWildcard() const {
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return m_entry[this->GetServiceNameSize()] == '*';
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}
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bool IsValid() const {
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/* Validate that we can access data. */
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if (m_entry == nullptr || m_capacity == 0) {
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return false;
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}
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/* Validate that the size is correct. */
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return this->GetSize() <= m_capacity;
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}
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};
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class InitialProcessIdLimits {
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private:
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os::ProcessId m_min;
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os::ProcessId m_max;
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public:
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InitialProcessIdLimits() {
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/* Retrieve process limits. */
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R_ABORT_UNLESS(svc::GetSystemInfo(std::addressof(m_min.value), svc::SystemInfoType_InitialProcessIdRange, svc::InvalidHandle, svc::InitialProcessIdRangeInfo_Minimum));
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R_ABORT_UNLESS(svc::GetSystemInfo(std::addressof(m_max.value), svc::SystemInfoType_InitialProcessIdRange, svc::InvalidHandle, svc::InitialProcessIdRangeInfo_Maximum));
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/* Ensure range is sane. */
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AMS_ABORT_UNLESS(m_min <= m_max);
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}
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bool IsInitialProcess(os::ProcessId process_id) const {
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AMS_ABORT_UNLESS(process_id != os::InvalidProcessId);
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return m_min <= process_id && process_id <= m_max;
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}
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};
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/* Static members. */
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/* NOTE: In 12.0.0, Nintendo added multithreaded processing to sm; however, official sm does not do */
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/* any kind of mutual exclusivity when accessing (and modifying) global state. Previously, this was */
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/* not a problem, because sm was strictly single-threaded, and so two threads could not race eachother. */
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/* We will add a mutex (and perform locking) in order to prevent simultaneous access to global state. */
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constinit os::SdkRecursiveMutex g_mutex;
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constinit std::array<ProcessInfo, ProcessCountMax> g_process_list = [] {
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std::array<ProcessInfo, ProcessCountMax> list = {};
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/* Initialize each info. */
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for (auto &process_info : list) {
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process_info = InvalidProcessInfo;
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}
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return list;
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}();
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constinit std::array<ServiceInfo, ServiceCountMax> g_service_list = [] {
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std::array<ServiceInfo, ServiceCountMax> list = {};
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/* Initialize each info. */
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for (auto &service_info : list) {
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service_info = InvalidServiceInfo;
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}
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return list;
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}();
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constinit std::array<ServiceName, MitmCountMax> g_future_mitm_list = [] {
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std::array<ServiceName, MitmCountMax> list = {};
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/* Initialize each info. */
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for (auto &name : list) {
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name = InvalidServiceName;
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}
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return list;
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}();
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constinit std::array<MitmInfo, MitmCountMax> g_mitm_list = [] {
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std::array<MitmInfo, MitmCountMax> list = {};
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/* Initialize each info. */
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for (auto &mitm_info : list) {
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mitm_info = InvalidMitmInfo;
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}
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return list;
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}();
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constinit bool g_ended_initial_defers = false;
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const InitialProcessIdLimits g_initial_process_id_limits;
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/* Helper functionality. */
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bool IsInitialProcess(os::ProcessId process_id) {
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return g_initial_process_id_limits.IsInitialProcess(process_id);
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}
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constexpr inline bool IsValidProcessId(os::ProcessId process_id) {
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return process_id != os::InvalidProcessId;
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}
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Result ValidateAccessControl(AccessControlEntry access_control, ServiceName service, bool is_host, bool is_wildcard) {
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/* Iterate over all entries in the access control, checking to see if we have a match. */
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while (access_control.IsValid()) {
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if (access_control.IsHost() == is_host) {
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bool is_valid = true;
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if (access_control.IsWildcard() == is_wildcard) {
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/* Check for exact match. */
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is_valid &= access_control.GetServiceName() == service;
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} else if (access_control.IsWildcard()) {
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/* Also allow fuzzy match for wildcard. */
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ServiceName ac_service = access_control.GetServiceName();
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is_valid &= std::memcmp(std::addressof(ac_service), std::addressof(service), access_control.GetServiceNameSize() - 1) == 0;
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}
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R_SUCCEED_IF(is_valid);
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}
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access_control = access_control.GetNextEntry();
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}
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return sm::ResultNotAllowed();
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}
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Result ValidateAccessControl(AccessControlEntry restriction, AccessControlEntry access) {
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/* Ensure that every entry in the access control is allowed by the restriction control. */
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while (access.IsValid()) {
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R_TRY(ValidateAccessControl(restriction, access.GetServiceName(), access.IsHost(), access.IsWildcard()));
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access = access.GetNextEntry();
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}
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return ResultSuccess();
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}
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Result ValidateServiceName(ServiceName service) {
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/* Service names must be non-empty. */
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R_UNLESS(service.name[0] != 0, sm::ResultInvalidServiceName());
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/* Get name length. */
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size_t name_len;
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for (name_len = 1; name_len < sizeof(service); name_len++) {
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if (service.name[name_len] == 0) {
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break;
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}
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}
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/* Names must be all-zero after they end. */
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while (name_len < sizeof(service)) {
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R_UNLESS(service.name[name_len++] == 0, sm::ResultInvalidServiceName());
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}
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return ResultSuccess();
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}
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bool ShouldDeferForInit(ServiceName service) {
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/* Once end has been called, we're done. */
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if (g_ended_initial_defers) {
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return false;
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}
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/* This is a mechanism by which certain services will always be deferred until sm:m receives a special command. */
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/* This can be extended with more services as needed at a later date. */
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for (const auto &service_name : InitiallyDeferredServices) {
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if (service == service_name) {
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return true;
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}
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}
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return false;
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}
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ProcessInfo *GetProcessInfo(os::ProcessId process_id) {
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/* Find a process info with a matching id. */
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for (auto &process_info : g_process_list) {
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if (process_info.process_id == process_id) {
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return std::addressof(process_info);
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}
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}
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return nullptr;
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}
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ProcessInfo *GetFreeProcessInfo() {
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return GetProcessInfo(os::InvalidProcessId);
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}
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bool HasProcessInfo(os::ProcessId process_id) {
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return GetProcessInfo(process_id) != nullptr;
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}
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ServiceInfo *GetServiceInfo(ServiceName service_name) {
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/* Find a service with a matching name. */
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for (auto &service_info : g_service_list) {
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if (service_info.name == service_name) {
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return std::addressof(service_info);
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}
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}
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return nullptr;
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}
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ServiceInfo *GetFreeServiceInfo() {
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return GetServiceInfo(InvalidServiceName);
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}
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bool HasServiceInfo(ServiceName service) {
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return GetServiceInfo(service) != nullptr;
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}
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MitmInfo *GetMitmInfo(const ServiceInfo *service_info) {
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if (service_info->mitm_index < MitmCountMax) {
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return std::addressof(g_mitm_list[service_info->mitm_index]);
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} else {
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return nullptr;
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}
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}
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MitmInfo *GetFreeMitmInfo() {
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/* Find a mitm info without an owner. */
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for (auto &mitm_info : g_mitm_list) {
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if (!IsValidProcessId(mitm_info.process_id)) {
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return std::addressof(mitm_info);
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}
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}
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return nullptr;
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}
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bool HasMitm(ServiceName service) {
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const ServiceInfo *service_info = GetServiceInfo(service);
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return service_info != nullptr && GetMitmInfo(service_info) != nullptr;
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}
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Result AddFutureMitmDeclaration(ServiceName service) {
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for (auto &future_mitm : g_future_mitm_list) {
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if (future_mitm == InvalidServiceName) {
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future_mitm = service;
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return ResultSuccess();
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}
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}
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return sm::ResultOutOfServices();
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}
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bool HasFutureMitmDeclaration(ServiceName service) {
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for (const auto &future_mitm : g_future_mitm_list){
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if (future_mitm == service) {
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return true;
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}
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}
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return false;
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}
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void ClearFutureMitmDeclaration(ServiceName service) {
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for (auto &future_mitm : g_future_mitm_list) {
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if (future_mitm == service) {
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future_mitm = InvalidServiceName;
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}
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}
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/* This might undefer some requests. */
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TriggerResume(service);
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}
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void GetMitmProcessInfo(MitmProcessInfo *out_info, os::ProcessId process_id) {
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/* Anything that can request a mitm session must have a process info. */
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const auto process_info = GetProcessInfo(process_id);
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AMS_ABORT_UNLESS(process_info != nullptr);
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/* Write to output. */
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out_info->process_id = process_id;
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out_info->program_id = process_info->program_id;
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out_info->override_status = process_info->override_status;
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}
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bool IsMitmDisallowed(ncm::ProgramId program_id) {
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/* Mitm used on certain programs can prevent the boot process from completing. */
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/* TODO: Is there a way to do this that's less hardcoded? Needs design thought. */
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return program_id == ncm::SystemProgramId::Loader ||
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program_id == ncm::SystemProgramId::Pm ||
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program_id == ncm::SystemProgramId::Spl ||
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program_id == ncm::SystemProgramId::Boot ||
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program_id == ncm::SystemProgramId::Ncm ||
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program_id == ncm::AtmosphereProgramId::Mitm ||
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program_id == ncm::SystemProgramId::Creport;
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}
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Result CreatePortImpl(os::NativeHandle *out_server, os::NativeHandle *out_client, size_t max_sessions, bool is_light, sm::ServiceName &name) {
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/* Create the port. */
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svc::Handle server_port, client_port;
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R_TRY(svc::CreatePort(std::addressof(server_port), std::addressof(client_port), max_sessions, is_light, reinterpret_cast<uintptr_t>(name.name)));
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/* Set the output handles. */
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*out_server = server_port;
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*out_client = client_port;
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return ResultSuccess();
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}
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Result ConnectToPortImpl(os::NativeHandle *out, os::NativeHandle port) {
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/* Connect to the port. */
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svc::Handle session;
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R_TRY(svc::ConnectToPort(std::addressof(session), port));
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/* Set the output handle. */
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*out = session;
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return ResultSuccess();
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}
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Result GetMitmServiceHandleImpl(os::NativeHandle *out, ServiceInfo *service_info, const MitmProcessInfo &client_info) {
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/* Get the mitm info. */
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MitmInfo *mitm_info = GetMitmInfo(service_info);
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AMS_ABORT_UNLESS(mitm_info != nullptr);
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/* Send command to query if we should mitm. */
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bool should_mitm;
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{
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/* TODO: Convert mitm internal messaging to use tipc? */
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::Service srv { .session = mitm_info->query_h };
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R_ABORT_UNLESS(::serviceDispatchInOut(std::addressof(srv), 65000, client_info, should_mitm));
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}
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/* If we shouldn't mitm, give normal session. */
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R_UNLESS(should_mitm, ConnectToPortImpl(out, service_info->port_h));
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/* Create both handles. */
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{
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/* Get the forward handle. */
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R_TRY(ConnectToPortImpl(std::addressof(mitm_info->fwd_sess_h), service_info->port_h));
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/* Get the mitm handle. */
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/* This should be guaranteed to succeed, since we got a forward handle. */
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R_ABORT_UNLESS(ConnectToPortImpl(out, mitm_info->port_h));
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}
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mitm_info->waiting_ack_process_id = client_info.process_id;
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mitm_info->waiting_ack = true;
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return ResultSuccess();
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}
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Result GetServiceHandleImpl(os::NativeHandle *out, ServiceInfo *service_info, os::ProcessId process_id) {
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/* Get the mitm info. */
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MitmInfo *mitm_info = GetMitmInfo(service_info);
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/* Check if we should return a mitm handle. */
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if (mitm_info != nullptr && mitm_info->process_id != process_id) {
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/* Get mitm process info, ensure that we're allowed to mitm the given program. */
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MitmProcessInfo client_info;
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GetMitmProcessInfo(std::addressof(client_info), process_id);
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if (!IsMitmDisallowed(client_info.program_id)) {
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/* Get a mitm service handle. */
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return GetMitmServiceHandleImpl(out, service_info, client_info);
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}
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}
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/* We're not returning a mitm handle, so just return a normal port handle. */
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return ConnectToPortImpl(out, service_info->port_h);
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}
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Result RegisterServiceImpl(os::NativeHandle *out, os::ProcessId process_id, ServiceName service, size_t max_sessions, bool is_light) {
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/* Validate service name. */
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R_TRY(ValidateServiceName(service));
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/* Don't try to register something already registered. */
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R_UNLESS(!HasServiceInfo(service), sm::ResultAlreadyRegistered());
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/* Get free service. */
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ServiceInfo *free_service = GetFreeServiceInfo();
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R_UNLESS(free_service != nullptr, sm::ResultOutOfServices());
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/* Create the new service. */
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R_TRY(CreatePortImpl(out, std::addressof(free_service->port_h), max_sessions, is_light, free_service->name));
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/* Save info. */
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free_service->name = service;
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free_service->owner_process_id = process_id;
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free_service->max_sessions = max_sessions;
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free_service->is_light = is_light;
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/* This might undefer some requests. */
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TriggerResume(service);
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return ResultSuccess();
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}
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void UnregisterServiceImpl(ServiceInfo *service_info) {
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/* Get the mitm info. */
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MitmInfo *mitm_info = GetMitmInfo(service_info);
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/* Close all valid handles. */
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os::CloseNativeHandle(service_info->port_h);
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/* Reset the info's state. */
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*service_info = InvalidServiceInfo;
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|
/* Reset the mitm info, if necessary. */
|
|
if (mitm_info != nullptr) {
|
|
os::CloseNativeHandle(mitm_info->port_h);
|
|
os::CloseNativeHandle(mitm_info->query_h);
|
|
os::CloseNativeHandle(mitm_info->fwd_sess_h);
|
|
|
|
*mitm_info = InvalidMitmInfo;
|
|
}
|
|
}
|
|
|
|
}
|
|
|
|
/* Client disconnection callback. */
|
|
void OnClientDisconnected(os::ProcessId process_id) {
|
|
/* Acquire exclusive access to global state. */
|
|
std::scoped_lock lk(g_mutex);
|
|
|
|
/* Ensure that the process id is valid. */
|
|
if (process_id == os::InvalidProcessId) {
|
|
return;
|
|
}
|
|
|
|
/* Unregister all services a client hosts, on attached-client-close. */
|
|
for (auto &service_info : g_service_list) {
|
|
if (service_info.name != InvalidServiceName && service_info.owner_process_id == process_id) {
|
|
UnregisterServiceImpl(std::addressof(service_info));
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Process management. */
|
|
Result RegisterProcess(os::ProcessId process_id, ncm::ProgramId program_id, cfg::OverrideStatus override_status, const void *acid_sac, size_t acid_sac_size, const void *aci_sac, size_t aci_sac_size) {
|
|
/* Acquire exclusive access to global state. */
|
|
std::scoped_lock lk(g_mutex);
|
|
|
|
/* Check that access control will fit in the ServiceInfo. */
|
|
R_UNLESS(aci_sac_size <= AccessControlSizeMax, sm::ResultTooLargeAccessControl());
|
|
|
|
/* Get free process. */
|
|
ProcessInfo *proc = GetFreeProcessInfo();
|
|
R_UNLESS(proc != nullptr, sm::ResultOutOfProcesses());
|
|
|
|
/* Validate restrictions. */
|
|
R_UNLESS(aci_sac_size != 0, sm::ResultNotAllowed());
|
|
R_TRY(ValidateAccessControl(AccessControlEntry(acid_sac, acid_sac_size), AccessControlEntry(aci_sac, aci_sac_size)));
|
|
|
|
/* Save info. */
|
|
proc->process_id = process_id;
|
|
proc->program_id = program_id;
|
|
proc->override_status = override_status;
|
|
proc->access_control_size = aci_sac_size;
|
|
std::memcpy(proc->access_control, aci_sac, proc->access_control_size);
|
|
|
|
return ResultSuccess();
|
|
}
|
|
|
|
Result UnregisterProcess(os::ProcessId process_id) {
|
|
/* Acquire exclusive access to global state. */
|
|
std::scoped_lock lk(g_mutex);
|
|
|
|
/* Find the process. */
|
|
ProcessInfo *proc = GetProcessInfo(process_id);
|
|
R_UNLESS(proc != nullptr, sm::ResultInvalidClient());
|
|
|
|
/* Free the process. */
|
|
*proc = InvalidProcessInfo;
|
|
|
|
return ResultSuccess();
|
|
}
|
|
|
|
/* Service management. */
|
|
Result HasService(bool *out, ServiceName service) {
|
|
/* Acquire exclusive access to global state. */
|
|
std::scoped_lock lk(g_mutex);
|
|
|
|
/* Validate service name. */
|
|
R_TRY(ValidateServiceName(service));
|
|
|
|
*out = HasServiceInfo(service);
|
|
return ResultSuccess();
|
|
}
|
|
|
|
Result WaitService(ServiceName service) {
|
|
/* Acquire exclusive access to global state. */
|
|
std::scoped_lock lk(g_mutex);
|
|
|
|
/* Check that we have the service. */
|
|
bool has_service = false;
|
|
R_TRY(impl::HasService(std::addressof(has_service), service));
|
|
|
|
/* If we don't, we want to wait until the service is registered. */
|
|
R_UNLESS(has_service, tipc::ResultRequestDeferred());
|
|
|
|
return ResultSuccess();
|
|
}
|
|
|
|
Result GetServiceHandle(os::NativeHandle *out, os::ProcessId process_id, ServiceName service) {
|
|
/* Acquire exclusive access to global state. */
|
|
std::scoped_lock lk(g_mutex);
|
|
|
|
/* Validate service name. */
|
|
R_TRY(ValidateServiceName(service));
|
|
|
|
/* Check that the process is registered and allowed to get the service. */
|
|
if (!IsInitialProcess(process_id)) {
|
|
ProcessInfo *proc = GetProcessInfo(process_id);
|
|
R_UNLESS(proc != nullptr, sm::ResultInvalidClient());
|
|
R_TRY(ValidateAccessControl(AccessControlEntry(proc->access_control, proc->access_control_size), service, false, false));
|
|
}
|
|
|
|
/* Get service info/mitm info. */
|
|
ServiceInfo *service_info = GetServiceInfo(service);
|
|
MitmInfo *mitm_info = service_info != nullptr ? GetMitmInfo(service_info) : nullptr;
|
|
|
|
/* Check to see if we need to defer until later. */
|
|
R_UNLESS(service_info != nullptr, tipc::ResultRequestDeferred());
|
|
R_UNLESS(!ShouldDeferForInit(service), tipc::ResultRequestDeferred());
|
|
R_UNLESS(!HasFutureMitmDeclaration(service), tipc::ResultRequestDeferred());
|
|
R_UNLESS((mitm_info == nullptr || !mitm_info->waiting_ack), tipc::ResultRequestDeferred());
|
|
|
|
/* Get a handle from the service info. */
|
|
R_TRY_CATCH(GetServiceHandleImpl(out, service_info, process_id)) {
|
|
R_CONVERT(svc::ResultOutOfSessions, sm::ResultOutOfSessions())
|
|
} R_END_TRY_CATCH;
|
|
|
|
return ResultSuccess();
|
|
}
|
|
|
|
Result RegisterService(os::NativeHandle *out, os::ProcessId process_id, ServiceName service, size_t max_sessions, bool is_light) {
|
|
/* Acquire exclusive access to global state. */
|
|
std::scoped_lock lk(g_mutex);
|
|
|
|
/* Validate service name. */
|
|
R_TRY(ValidateServiceName(service));
|
|
|
|
/* Check that the process is registered and allowed to register the service. */
|
|
if (!IsInitialProcess(process_id)) {
|
|
ProcessInfo *proc = GetProcessInfo(process_id);
|
|
R_UNLESS(proc != nullptr, sm::ResultInvalidClient());
|
|
|
|
R_TRY(ValidateAccessControl(AccessControlEntry(proc->access_control, proc->access_control_size), service, true, false));
|
|
}
|
|
|
|
/* Check that the service isn't already registered. */
|
|
R_UNLESS(!HasServiceInfo(service), sm::ResultAlreadyRegistered());
|
|
|
|
return RegisterServiceImpl(out, process_id, service, max_sessions, is_light);
|
|
}
|
|
|
|
Result RegisterServiceForSelf(os::NativeHandle *out, ServiceName service, size_t max_sessions) {
|
|
/* Acquire exclusive access to global state. */
|
|
std::scoped_lock lk(g_mutex);
|
|
|
|
return RegisterServiceImpl(out, os::GetCurrentProcessId(), service, max_sessions, false);
|
|
}
|
|
|
|
Result UnregisterService(os::ProcessId process_id, ServiceName service) {
|
|
/* Acquire exclusive access to global state. */
|
|
std::scoped_lock lk(g_mutex);
|
|
|
|
/* Validate service name. */
|
|
R_TRY(ValidateServiceName(service));
|
|
|
|
/* Check that the process is registered. */
|
|
if (!IsInitialProcess(process_id)) {
|
|
R_UNLESS(HasProcessInfo(process_id), sm::ResultInvalidClient());
|
|
}
|
|
|
|
/* Ensure that the service is actually registered. */
|
|
ServiceInfo *service_info = GetServiceInfo(service);
|
|
R_UNLESS(service_info != nullptr, sm::ResultNotRegistered());
|
|
|
|
/* Check if we have permission to do this. */
|
|
R_UNLESS(service_info->owner_process_id == process_id, sm::ResultNotAllowed());
|
|
|
|
/* Unregister the service. */
|
|
UnregisterServiceImpl(service_info);
|
|
|
|
return ResultSuccess();
|
|
}
|
|
|
|
/* Mitm extensions. */
|
|
Result HasMitm(bool *out, ServiceName service) {
|
|
/* Acquire exclusive access to global state. */
|
|
std::scoped_lock lk(g_mutex);
|
|
|
|
/* Validate service name. */
|
|
R_TRY(ValidateServiceName(service));
|
|
|
|
/* Get whether we have a mitm. */
|
|
*out = HasMitm(service);
|
|
|
|
return ResultSuccess();
|
|
}
|
|
|
|
Result WaitMitm(ServiceName service) {
|
|
/* Acquire exclusive access to global state. */
|
|
std::scoped_lock lk(g_mutex);
|
|
|
|
/* Check that we have the mitm. */
|
|
bool has_mitm = false;
|
|
R_TRY(impl::HasMitm(std::addressof(has_mitm), service));
|
|
|
|
/* If we don't, we want to wait until the mitm is installed. */
|
|
R_UNLESS(has_mitm, tipc::ResultRequestDeferred());
|
|
|
|
return ResultSuccess();
|
|
}
|
|
|
|
Result InstallMitm(os::NativeHandle *out, os::NativeHandle *out_query, os::ProcessId process_id, ServiceName service) {
|
|
/* Acquire exclusive access to global state. */
|
|
std::scoped_lock lk(g_mutex);
|
|
|
|
/* Validate service name. */
|
|
R_TRY(ValidateServiceName(service));
|
|
|
|
/* Check that the process is registered and allowed to register the service. */
|
|
if (!IsInitialProcess(process_id)) {
|
|
ProcessInfo *proc = GetProcessInfo(process_id);
|
|
R_UNLESS(proc != nullptr, sm::ResultInvalidClient());
|
|
R_TRY(ValidateAccessControl(AccessControlEntry(proc->access_control, proc->access_control_size), service, true, false));
|
|
}
|
|
|
|
/* Validate that the service exists. */
|
|
ServiceInfo *service_info = GetServiceInfo(service);
|
|
|
|
/* If it doesn't exist, defer until it does. */
|
|
R_UNLESS(service_info != nullptr, tipc::ResultRequestDeferred());
|
|
|
|
/* Validate that the service isn't already being mitm'd. */
|
|
R_UNLESS(GetMitmInfo(service_info) == nullptr, sm::ResultAlreadyRegistered());
|
|
|
|
/* Validate that we can create a new mitm. */
|
|
MitmInfo *mitm_info = GetFreeMitmInfo();
|
|
R_UNLESS(mitm_info != nullptr, sm::ResultOutOfServices());
|
|
|
|
/* If we don't have a future mitm declaration, add one. */
|
|
/* Client will clear this when ready to process. */
|
|
const bool has_existing_future_declaration = HasFutureMitmDeclaration(service);
|
|
if (!has_existing_future_declaration) {
|
|
R_TRY(AddFutureMitmDeclaration(service));
|
|
}
|
|
|
|
auto future_guard = SCOPE_GUARD { if (!has_existing_future_declaration) { ClearFutureMitmDeclaration(service); } };
|
|
|
|
/* Create mitm handles. */
|
|
{
|
|
/* Get the port handles. */
|
|
os::NativeHandle hnd, port_hnd;
|
|
R_TRY(CreatePortImpl(std::addressof(hnd), std::addressof(port_hnd), service_info->max_sessions, service_info->is_light, service_info->name));
|
|
|
|
/* Ensure that we clean up the port handles, if something goes wrong creating the query sessions. */
|
|
auto port_guard = SCOPE_GUARD { os::CloseNativeHandle(hnd); os::CloseNativeHandle(port_hnd); };
|
|
|
|
/* Create the session for our query service. */
|
|
os::NativeHandle qry_hnd, mitm_qry_hnd;
|
|
R_TRY(svc::CreateSession(std::addressof(qry_hnd), std::addressof(mitm_qry_hnd), false, 0));
|
|
|
|
/* We created the query service session, so we no longer need to clean up the port handles. */
|
|
port_guard.Cancel();
|
|
|
|
/* Setup the mitm info. */
|
|
mitm_info->process_id = process_id;
|
|
mitm_info->port_h = port_hnd;
|
|
mitm_info->query_h = mitm_qry_hnd;
|
|
|
|
/* Setup the service info. */
|
|
service_info->mitm_index = mitm_info - g_mitm_list.data();
|
|
|
|
/* Copy to output. */
|
|
*out = hnd;
|
|
*out_query = qry_hnd;
|
|
|
|
/* This might undefer some requests. */
|
|
TriggerResume(service);
|
|
}
|
|
|
|
future_guard.Cancel();
|
|
return ResultSuccess();
|
|
}
|
|
|
|
Result UninstallMitm(os::ProcessId process_id, ServiceName service) {
|
|
/* Acquire exclusive access to global state. */
|
|
std::scoped_lock lk(g_mutex);
|
|
|
|
/* Validate service name. */
|
|
R_TRY(ValidateServiceName(service));
|
|
|
|
/* Check that the process is registered. */
|
|
if (!IsInitialProcess(process_id)) {
|
|
ProcessInfo *proc = GetProcessInfo(process_id);
|
|
R_UNLESS(proc != nullptr, sm::ResultInvalidClient());
|
|
}
|
|
|
|
/* Validate that the service exists. */
|
|
ServiceInfo *service_info = GetServiceInfo(service);
|
|
R_UNLESS(service_info != nullptr, sm::ResultNotRegistered());
|
|
|
|
/* Validate that the service is mitm'd. */
|
|
MitmInfo *mitm_info = GetMitmInfo(service_info);
|
|
R_UNLESS(mitm_info != nullptr, sm::ResultNotRegistered());
|
|
|
|
/* Validate that the client process_id is the mitm process. */
|
|
R_UNLESS(mitm_info->process_id == process_id, sm::ResultNotAllowed());
|
|
|
|
/* Uninstall the mitm. */
|
|
{
|
|
/* Close mitm handles. */
|
|
os::CloseNativeHandle(mitm_info->port_h);
|
|
os::CloseNativeHandle(mitm_info->query_h);
|
|
os::CloseNativeHandle(mitm_info->fwd_sess_h);
|
|
|
|
/* Reset mitm members. */
|
|
*mitm_info = InvalidMitmInfo;
|
|
|
|
/* Reset service info. */
|
|
service_info->mitm_index = MitmCountMax;
|
|
}
|
|
|
|
return ResultSuccess();
|
|
}
|
|
|
|
Result DeclareFutureMitm(os::ProcessId process_id, ServiceName service) {
|
|
/* Acquire exclusive access to global state. */
|
|
std::scoped_lock lk(g_mutex);
|
|
|
|
/* Validate service name. */
|
|
R_TRY(ValidateServiceName(service));
|
|
|
|
/* Check that the process is registered and allowed to register the service. */
|
|
if (!IsInitialProcess(process_id)) {
|
|
ProcessInfo *proc = GetProcessInfo(process_id);
|
|
R_UNLESS(proc != nullptr, sm::ResultInvalidClient());
|
|
R_TRY(ValidateAccessControl(AccessControlEntry(proc->access_control, proc->access_control_size), service, true, false));
|
|
}
|
|
|
|
/* Check that mitm hasn't already been registered or declared. */
|
|
R_UNLESS(!HasMitm(service), sm::ResultAlreadyRegistered());
|
|
R_UNLESS(!HasFutureMitmDeclaration(service), sm::ResultAlreadyRegistered());
|
|
|
|
/* Try to forward declare it. */
|
|
R_TRY(AddFutureMitmDeclaration(service));
|
|
|
|
return ResultSuccess();
|
|
}
|
|
|
|
Result ClearFutureMitm(os::ProcessId process_id, ServiceName service) {
|
|
/* Acquire exclusive access to global state. */
|
|
std::scoped_lock lk(g_mutex);
|
|
|
|
/* Validate service name. */
|
|
R_TRY(ValidateServiceName(service));
|
|
|
|
/* Check that the process is registered and allowed to register the service. */
|
|
if (!IsInitialProcess(process_id)) {
|
|
ProcessInfo *proc = GetProcessInfo(process_id);
|
|
R_UNLESS(proc != nullptr, sm::ResultInvalidClient());
|
|
R_TRY(ValidateAccessControl(AccessControlEntry(proc->access_control, proc->access_control_size), service, true, false));
|
|
}
|
|
|
|
/* Validate that the service exists. */
|
|
ServiceInfo *service_info = GetServiceInfo(service);
|
|
R_UNLESS(service_info != nullptr, sm::ResultNotRegistered());
|
|
|
|
/* Check that we have a mitm or a future declaration. */
|
|
if (MitmInfo *mitm_info = GetMitmInfo(service_info); mitm_info != nullptr) {
|
|
/* Validate that the client process_id is the mitm process. */
|
|
R_UNLESS(mitm_info->process_id == process_id, sm::ResultNotAllowed());
|
|
} else {
|
|
R_UNLESS(HasFutureMitmDeclaration(service), sm::ResultNotRegistered());
|
|
}
|
|
|
|
/* Clear the forward declaration. */
|
|
ClearFutureMitmDeclaration(service);
|
|
|
|
return ResultSuccess();
|
|
}
|
|
|
|
Result AcknowledgeMitmSession(MitmProcessInfo *out_info, os::NativeHandle *out_hnd, os::ProcessId process_id, ServiceName service) {
|
|
/* Acquire exclusive access to global state. */
|
|
std::scoped_lock lk(g_mutex);
|
|
|
|
/* Validate service name. */
|
|
R_TRY(ValidateServiceName(service));
|
|
|
|
/* Check that the process is registered. */
|
|
if (!IsInitialProcess(process_id)) {
|
|
ProcessInfo *proc = GetProcessInfo(process_id);
|
|
R_UNLESS(proc != nullptr, sm::ResultInvalidClient());
|
|
}
|
|
|
|
/* Validate that the service exists. */
|
|
ServiceInfo *service_info = GetServiceInfo(service);
|
|
R_UNLESS(service_info != nullptr, sm::ResultNotRegistered());
|
|
|
|
/* Get the mitm info. */
|
|
MitmInfo *mitm_info = GetMitmInfo(service_info);
|
|
R_UNLESS(mitm_info != nullptr, sm::ResultNotRegistered());
|
|
|
|
/* Validate that the client process_id is the mitm process, and that an acknowledgement is waiting. */
|
|
R_UNLESS(mitm_info->process_id == process_id, sm::ResultNotAllowed());
|
|
R_UNLESS(mitm_info->waiting_ack, sm::ResultNotAllowed());
|
|
|
|
/* Acknowledge. */
|
|
{
|
|
/* Copy the mitm info to output. */
|
|
GetMitmProcessInfo(out_info, mitm_info->waiting_ack_process_id);
|
|
|
|
/* Set the output handle. */
|
|
*out_hnd = mitm_info->fwd_sess_h;
|
|
mitm_info->fwd_sess_h = os::InvalidNativeHandle;
|
|
|
|
/* Clear acknowledgement-related fields. */
|
|
mitm_info->waiting_ack = false;
|
|
mitm_info->waiting_ack_process_id = os::InvalidProcessId;
|
|
}
|
|
|
|
/* Undefer requests to the session. */
|
|
TriggerResume(service);
|
|
|
|
return ResultSuccess();
|
|
}
|
|
|
|
/* Deferral extension (works around FS bug). */
|
|
Result EndInitialDefers() {
|
|
/* Acquire exclusive access to global state. */
|
|
std::scoped_lock lk(g_mutex);
|
|
|
|
/* Note that we have ended the initial deferral period. */
|
|
const bool had_ended_defers = g_ended_initial_defers;
|
|
g_ended_initial_defers = true;
|
|
|
|
/* Something about deferral state has changed, so we should refresh our hos version. */
|
|
hos::InitializeVersionInternal(!had_ended_defers);
|
|
|
|
/* This might undefer some requests. */
|
|
for (const auto &service_name : InitiallyDeferredServices) {
|
|
TriggerResume(service_name);
|
|
}
|
|
|
|
return ResultSuccess();
|
|
}
|
|
|
|
}
|