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https://github.com/Atmosphere-NX/Atmosphere.git
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96f95b9f95
* result: try out some experimental shenanigans * result: sketch out some more shenanigans * result: see what it looks like to convert kernel to use result conds instead of guards * make rest of kernel use experimental new macro-ing
199 lines
11 KiB
C++
199 lines
11 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_user_service.hpp"
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#include "impl/sm_service_manager.hpp"
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namespace ams::sm {
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namespace {
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constexpr const u8 CmifResponseToQueryPointerBufferSize[] = {
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0x00, 0x00, 0x00, 0x00, 0x07, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x53, 0x46, 0x43, 0x4F, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00,
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};
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static_assert(CmifCommandType_Request == 4);
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constexpr const u8 CmifExpectedRequestHeaderForRegisterClientAndDetachClient[] = {
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0x04, 0x00, 0x00, 0x00, 0x0A, 0x00, 0x00, 0x80, 0x01, 0x00, 0x00, 0x00,
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};
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constexpr const u8 CmifResponseToRegisterClientAndDetachClient[] = {
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0x00, 0x00, 0x00, 0x00, 0x06, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x53, 0x46, 0x43, 0x4F, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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};
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constexpr const u8 CmifExpectedRequestHeaderForGetServiceHandleAndUnregisterService[] = {
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0x04, 0x00, 0x00, 0x00, 0x0A, 0x00, 0x00, 0x00
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};
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constexpr const u8 CmifResponseToGetServiceHandleAndRegisterService[] = {
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0x00, 0x00, 0x00, 0x00, 0x04, 0x00, 0x00, 0x80, 0x20, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x53, 0x46, 0x43, 0x4F, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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};
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constexpr const u8 CmifResponseToUnregisterService[] = {
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0x00, 0x00, 0x00, 0x00, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x53, 0x46, 0x43, 0x4F, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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};
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constexpr const u8 CmifExpectedRequestHeaderForRegisterService[] = {
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0x04, 0x00, 0x00, 0x00, 0x0C, 0x00, 0x00, 0x00
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};
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static_assert(tipc::ResultRequestDeferred().GetValue() == 0xC823);
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constexpr const u8 CmifResponseToForceProcessorDeferral[] = {
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0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x23, 0xC8, 0x00, 0x00,
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};
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}
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Result UserService::ProcessDefaultServiceCommand(const svc::ipc::MessageBuffer &message_buffer) {
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/* Parse the hipc headers. */
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const svc::ipc::MessageBuffer::MessageHeader message_header(message_buffer);
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const svc::ipc::MessageBuffer::SpecialHeader special_header(message_buffer, message_header);
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/* Get the request tag. */
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const auto tag = message_header.GetTag();
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/* Handle the case where we received a control request. */
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if (tag == CmifCommandType_Control || tag == CmifCommandType_ControlWithContext) {
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/* The only control/control with context command which we support is QueryPointerBufferSize. */
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/* We do not have a pointer buffer, and so our pointer buffer size is zero. */
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/* Return the relevant hardcoded response. */
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std::memcpy(message_buffer.GetBufferForDebug(), CmifResponseToQueryPointerBufferSize, sizeof(CmifResponseToQueryPointerBufferSize));
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R_SUCCEED();
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}
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/* We only support request (with context), from this point forwards. */
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R_UNLESS((tag == CmifCommandType_Request || tag == CmifCommandType_RequestWithContext), tipc::ResultInvalidMethod());
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/* For ease of parsing, we will alter the tag to be Request when it is RequestWithContext. */
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if (tag == CmifCommandType_RequestWithContext) {
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message_buffer.Set(svc::ipc::MessageBuffer::MessageHeader(CmifCommandType_Request,
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message_header.GetHasSpecialHeader(),
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message_header.GetPointerCount(),
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message_header.GetSendCount(),
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message_header.GetReceiveCount(),
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message_header.GetExchangeCount(),
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message_header.GetRawCount(),
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message_header.GetReceiveListCount()));
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}
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/* NOTE: Nintendo only supports RegisterClient and GetServiceHandle. However, it would break */
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/* a substantial amount of homebrew system modules, if we were to not provide shims for some */
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/* other commands (RegisterService, and UnregisterService, in particular). As such, we will */
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/* do the nice thing, and accommodate this by providing backwards compatibility shims for */
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/* those commands. */
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/* Please note, though, that the atmosphere extensions are not shimmed, as performing all the required */
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/* parsing for that seems unreasonable. Also, if you are using atmosphere extensions, you are probably */
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/* used to my breaking shit regularly anyway, and I don't expect much of a fuss to be raised by you. */
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/* I invite you to demonstrate to me that this expectation does not reflect reality. */
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const u8 * const raw_message_buffer = static_cast<const u8 *>(message_buffer.GetBufferForDebug());
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u8 * const out_message_buffer = static_cast<u8 *>(message_buffer.GetBufferForDebug());
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if (std::memcmp(raw_message_buffer, CmifExpectedRequestHeaderForRegisterClientAndDetachClient, sizeof(CmifExpectedRequestHeaderForRegisterClientAndDetachClient)) == 0) {
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/* Get the command id. */
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const u32 command_id = *reinterpret_cast<const u32 *>(raw_message_buffer + 0x28);
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/* Get the client process id. */
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u64 client_process_id;
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std::memcpy(std::addressof(client_process_id), raw_message_buffer + 0xC, sizeof(client_process_id));
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if (command_id == 0) {
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/* Invoke the handler for RegisterClient. */
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R_ABORT_UNLESS(this->RegisterClient(tipc::ClientProcessId{ client_process_id }));
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} else if (command_id == 4) {
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/* Invoke the handler for DetachClient. */
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R_ABORT_UNLESS(this->DetachClient(tipc::ClientProcessId{ client_process_id }));
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} else {
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R_THROW(tipc::ResultInvalidMethod());
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}
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/* Serialize output. */
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std::memcpy(out_message_buffer, CmifResponseToRegisterClientAndDetachClient, sizeof(CmifResponseToRegisterClientAndDetachClient));
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} else if (std::memcmp(raw_message_buffer, CmifExpectedRequestHeaderForGetServiceHandleAndUnregisterService, sizeof(CmifExpectedRequestHeaderForGetServiceHandleAndUnregisterService)) == 0) {
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/* Get the command id. */
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const u32 command_id = *reinterpret_cast<const u32 *>(raw_message_buffer + 0x18);
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/* Get the service_name. */
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sm::ServiceName service_name;
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std::memcpy(std::addressof(service_name), raw_message_buffer + 0x20, sizeof(service_name));
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if (command_id == 1) {
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/* Invoke the handler for GetServiceHandle. */
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svc::Handle out_handle = svc::InvalidHandle;
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const Result result = this->GetServiceHandle(std::addressof(out_handle), service_name);
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/* Serialize output. */
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if (!tipc::ResultRequestDeferred::Includes(result)) {
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std::memcpy(out_message_buffer + 0x00, CmifResponseToGetServiceHandleAndRegisterService, sizeof(CmifResponseToGetServiceHandleAndRegisterService));
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std::memcpy(out_message_buffer + 0x0C, std::addressof(out_handle), sizeof(out_handle));
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std::memcpy(out_message_buffer + 0x18, std::addressof(result), sizeof(result));
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} else {
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std::memcpy(out_message_buffer, CmifResponseToForceProcessorDeferral, sizeof(CmifResponseToForceProcessorDeferral));
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}
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} else if (command_id == 3) {
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/* Invoke the handler for UnregisterService. */
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const Result result = this->UnregisterService(service_name);
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/* Serialize output. */
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std::memcpy(out_message_buffer + 0x00, CmifResponseToUnregisterService, sizeof(CmifResponseToUnregisterService));
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std::memcpy(out_message_buffer + 0x18, std::addressof(result), sizeof(result));
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} else {
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R_THROW(tipc::ResultInvalidMethod());
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}
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} else if (std::memcmp(raw_message_buffer, CmifExpectedRequestHeaderForRegisterService, sizeof(CmifExpectedRequestHeaderForRegisterService)) == 0) {
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/* Get the command id. */
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const u32 command_id = *reinterpret_cast<const u32 *>(raw_message_buffer + 0x18);
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/* Get the service_name. */
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sm::ServiceName service_name;
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std::memcpy(std::addressof(service_name), raw_message_buffer + 0x20, sizeof(service_name));
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/* Get "is light". */
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bool is_light;
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is_light = (raw_message_buffer[0x28] & 0x01) != 0;
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/* Get the max sessions. */
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u32 max_sessions;
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std::memcpy(std::addressof(max_sessions), raw_message_buffer + 0x2C, sizeof(max_sessions));
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if (command_id == 2) {
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/* Invoke the handler for RegisterService. */
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svc::Handle out_handle = svc::InvalidHandle;
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const Result result = this->RegisterService(std::addressof(out_handle), service_name, max_sessions, is_light);
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/* Serialize output. */
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std::memcpy(out_message_buffer + 0x00, CmifResponseToGetServiceHandleAndRegisterService, sizeof(CmifResponseToGetServiceHandleAndRegisterService));
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std::memcpy(out_message_buffer + 0x0C, std::addressof(out_handle), sizeof(out_handle));
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std::memcpy(out_message_buffer + 0x18, std::addressof(result), sizeof(result));
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} else {
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R_THROW(tipc::ResultInvalidMethod());
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}
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} else {
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R_THROW(tipc::ResultInvalidMethod());
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}
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R_SUCCEED();
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}
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}
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