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https://github.com/Atmosphere-NX/Atmosphere.git
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424 lines
15 KiB
C++
424 lines
15 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 "htclow_mux.hpp"
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#include "../htclow_packet_factory.hpp"
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#include "../ctrl/htclow_ctrl_state_machine.hpp"
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namespace ams::htclow::mux {
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Mux::Mux(PacketFactory *pf, ctrl::HtcctrlStateMachine *sm)
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: m_packet_factory(pf), m_state_machine(sm), m_task_manager(), m_event(os::EventClearMode_ManualClear),
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m_channel_impl_map(pf, sm, std::addressof(m_task_manager), std::addressof(m_event)), m_global_send_buffer(pf),
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m_mutex(), m_state(MuxState::Normal), m_version(ProtocolVersion)
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{
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/* ... */
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}
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void Mux::SetVersion(u16 version) {
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/* Set our version. */
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m_version = version;
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/* Set all entries in our map. */
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/* NOTE: Nintendo does this highly inefficiently... */
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for (auto &pair : m_channel_impl_map.GetMap()) {
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m_channel_impl_map[pair.second].SetVersion(m_version);
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}
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}
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Result Mux::CheckReceivedHeader(const PacketHeader &header) const {
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/* Check the packet signature. */
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AMS_ASSERT(header.signature == HtcGen2Signature);
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/* Switch on the packet type. */
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switch (header.packet_type) {
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case PacketType_Data:
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R_UNLESS(header.version == m_version, htclow::ResultProtocolError());
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R_UNLESS(header.body_size <= sizeof(PacketBody), htclow::ResultProtocolError());
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break;
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case PacketType_MaxData:
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R_UNLESS(header.version == m_version, htclow::ResultProtocolError());
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R_UNLESS(header.body_size == 0, htclow::ResultProtocolError());
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break;
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case PacketType_Error:
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R_UNLESS(header.body_size == 0, htclow::ResultProtocolError());
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break;
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AMS_UNREACHABLE_DEFAULT_CASE();
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}
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return ResultSuccess();
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}
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Result Mux::ProcessReceivePacket(const PacketHeader &header, const void *body, size_t body_size) {
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/* Lock ourselves. */
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std::scoped_lock lk(m_mutex);
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/* Process for the channel. */
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if (auto it = m_channel_impl_map.GetMap().find(header.channel); it != m_channel_impl_map.GetMap().end()) {
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return m_channel_impl_map[it->second].ProcessReceivePacket(header, body, body_size);
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} else {
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if (header.packet_type == PacketType_Data || header.packet_type == PacketType_MaxData) {
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this->SendErrorPacket(header.channel);
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}
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return htclow::ResultChannelNotExist();
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}
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}
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bool Mux::QuerySendPacket(PacketHeader *header, PacketBody *body, int *out_body_size) {
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/* Lock ourselves. */
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std::scoped_lock lk(m_mutex);
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/* Check for an error packet. */
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/* NOTE: Nintendo checks this once per iteration of the below loop. */
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/* The extra checks are unnecessary, because we hold our mutex. */
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if (auto *error_packet = m_global_send_buffer.GetNextPacket(); error_packet != nullptr) {
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std::memcpy(header, error_packet->GetHeader(), sizeof(*header));
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*out_body_size = 0;
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return true;
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}
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/* Iterate the map, checking each channel for a valid valid packet. */
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for (auto &pair : m_channel_impl_map.GetMap()) {
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/* Get the current channel impl. */
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/* See if the channel has something for us to send. */
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if (m_channel_impl_map[pair.second].QuerySendPacket(header, body, out_body_size)) {
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return this->IsSendable(header->packet_type);
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}
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}
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return false;
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}
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void Mux::RemovePacket(const PacketHeader &header) {
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/* Lock ourselves. */
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std::scoped_lock lk(m_mutex);
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/* Remove the packet from the appropriate source. */
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if (header.packet_type == PacketType_Error) {
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m_global_send_buffer.RemovePacket();
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} else if (auto it = m_channel_impl_map.GetMap().find(header.channel); it != m_channel_impl_map.GetMap().end()) {
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m_channel_impl_map[it->second].RemovePacket(header);
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}
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/* Notify the task manager. */
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m_task_manager.NotifySendReady();
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}
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void Mux::UpdateChannelState() {
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/* Lock ourselves. */
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std::scoped_lock lk(m_mutex);
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/* Update the state of all channels in our map. */
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/* NOTE: Nintendo does this highly inefficiently... */
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for (auto pair : m_channel_impl_map.GetMap()) {
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m_channel_impl_map[pair.second].UpdateState();
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}
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}
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void Mux::UpdateMuxState() {
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/* Lock ourselves. */
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std::scoped_lock lk(m_mutex);
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/* Update whether we're sleeping. */
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if (m_state_machine->IsSleeping()) {
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m_state = MuxState::Sleep;
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} else {
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m_state = MuxState::Normal;
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m_event.Signal();
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}
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}
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Result Mux::CheckChannelExist(impl::ChannelInternalType channel) {
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R_UNLESS(m_channel_impl_map.Exists(channel), htclow::ResultChannelNotExist());
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return ResultSuccess();
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}
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Result Mux::SendErrorPacket(impl::ChannelInternalType channel) {
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/* Create and send the packet. */
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R_TRY(m_global_send_buffer.AddPacket(m_packet_factory->MakeErrorPacket(channel)));
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/* Signal our event. */
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m_event.Signal();
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return ResultSuccess();
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}
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bool Mux::IsSendable(PacketType packet_type) const {
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switch (m_state) {
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case MuxState::Normal:
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return true;
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case MuxState::Sleep:
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return false;
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AMS_UNREACHABLE_DEFAULT_CASE();
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}
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}
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Result Mux::Open(impl::ChannelInternalType channel) {
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/* Lock ourselves. */
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std::scoped_lock lk(m_mutex);
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/* Check that the channel doesn't already exist. */
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R_UNLESS(!m_channel_impl_map.Exists(channel), htclow::ResultChannelAlreadyExist());
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/* Add the channel. */
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R_TRY(m_channel_impl_map.AddChannel(channel));
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/* Set the channel version. */
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m_channel_impl_map.GetChannelImpl(channel).SetVersion(m_version);
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return ResultSuccess();
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}
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Result Mux::Close(impl::ChannelInternalType channel) {
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/* Lock ourselves. */
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std::scoped_lock lk(m_mutex);
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/* If we have the channel, close it. */
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if (auto it = m_channel_impl_map.GetMap().find(channel); it != m_channel_impl_map.GetMap().end()) {
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/* Shut down the channel. */
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m_channel_impl_map[it->second].ShutdownForce();
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/* Remove the channel. */
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R_ABORT_UNLESS(m_channel_impl_map.RemoveChannel(channel));
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}
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return ResultSuccess();
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}
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Result Mux::ConnectBegin(u32 *out_task_id, impl::ChannelInternalType channel) {
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/* Lock ourselves. */
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std::scoped_lock lk(m_mutex);
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/* Find the channel. */
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auto it = m_channel_impl_map.GetMap().find(channel);
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R_UNLESS(it != m_channel_impl_map.GetMap().end(), htclow::ResultChannelNotExist());
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/* Perform the connection. */
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return m_channel_impl_map[it->second].DoConnectBegin(out_task_id);
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}
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Result Mux::ConnectEnd(impl::ChannelInternalType channel, u32 task_id) {
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/* Lock ourselves. */
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std::scoped_lock lk(m_mutex);
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/* Get the trigger for the task. */
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const auto trigger = m_task_manager.GetTrigger(task_id);
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/* Free the task. */
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m_task_manager.FreeTask(task_id);
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/* Check that we didn't hit a disconnect. */
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R_UNLESS(trigger != EventTrigger_Disconnect, htclow::ResultInvalidChannelStateDisconnected());
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/* Find the channel. */
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auto it = m_channel_impl_map.GetMap().find(channel);
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R_UNLESS(it != m_channel_impl_map.GetMap().end(), htclow::ResultChannelNotExist());
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/* Perform the disconnection. */
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return m_channel_impl_map[it->second].DoConnectEnd();
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}
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ChannelState Mux::GetChannelState(impl::ChannelInternalType channel) {
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/* Lock ourselves. */
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std::scoped_lock lk(m_mutex);
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return m_channel_impl_map.GetChannelImpl(channel).GetChannelState();
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}
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os::EventType *Mux::GetChannelStateEvent(impl::ChannelInternalType channel) {
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/* Lock ourselves. */
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std::scoped_lock lk(m_mutex);
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return m_channel_impl_map.GetChannelImpl(channel).GetChannelStateEvent();
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}
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Result Mux::FlushBegin(u32 *out_task_id, impl::ChannelInternalType channel) {
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/* Lock ourselves. */
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std::scoped_lock lk(m_mutex);
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/* Find the channel. */
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auto it = m_channel_impl_map.GetMap().find(channel);
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R_UNLESS(it != m_channel_impl_map.GetMap().end(), htclow::ResultChannelNotExist());
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/* Perform the connection. */
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return m_channel_impl_map[it->second].DoFlush(out_task_id);
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}
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Result Mux::FlushEnd(u32 task_id) {
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/* Lock ourselves. */
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std::scoped_lock lk(m_mutex);
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/* Get the trigger for the task. */
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const auto trigger = m_task_manager.GetTrigger(task_id);
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/* Free the task. */
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m_task_manager.FreeTask(task_id);
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/* Check that we didn't hit a disconnect. */
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R_UNLESS(trigger != EventTrigger_Disconnect, htclow::ResultInvalidChannelStateDisconnected());
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return ResultSuccess();
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}
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os::EventType *Mux::GetTaskEvent(u32 task_id) {
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/* Lock ourselves. */
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std::scoped_lock lk(m_mutex);
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return m_task_manager.GetTaskEvent(task_id);
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}
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Result Mux::ReceiveBegin(u32 *out_task_id, impl::ChannelInternalType channel, size_t size) {
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/* Lock ourselves. */
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std::scoped_lock lk(m_mutex);
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/* Find the channel. */
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auto it = m_channel_impl_map.GetMap().find(channel);
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R_UNLESS(it != m_channel_impl_map.GetMap().end(), htclow::ResultChannelNotExist());
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/* Perform the connection. */
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return m_channel_impl_map[it->second].DoReceiveBegin(out_task_id, size);
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}
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Result Mux::ReceiveEnd(size_t *out, void *dst, size_t dst_size, impl::ChannelInternalType channel, u32 task_id) {
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/* Lock ourselves. */
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std::scoped_lock lk(m_mutex);
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/* Free the task. */
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m_task_manager.FreeTask(task_id);
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/* If we have data, perform the receive. */
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if (dst_size > 0) {
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/* Find the channel. */
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auto it = m_channel_impl_map.GetMap().find(channel);
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R_UNLESS(it != m_channel_impl_map.GetMap().end(), htclow::ResultChannelNotExist());
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/* Perform the receive. */
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return m_channel_impl_map[it->second].DoReceiveEnd(out, dst, dst_size);
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} else {
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*out = 0;
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return ResultSuccess();
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}
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}
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Result Mux::SendBegin(u32 *out_task_id, size_t *out, const void *src, size_t src_size, impl::ChannelInternalType channel) {
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/* Lock ourselves. */
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std::scoped_lock lk(m_mutex);
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/* Find the channel. */
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auto it = m_channel_impl_map.GetMap().find(channel);
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R_UNLESS(it != m_channel_impl_map.GetMap().end(), htclow::ResultChannelNotExist());
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/* Perform the connection. */
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return m_channel_impl_map[it->second].DoSend(out_task_id, out, src, src_size);
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}
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Result Mux::SendEnd(u32 task_id) {
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/* Lock ourselves. */
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std::scoped_lock lk(m_mutex);
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/* Get the trigger for the task. */
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const auto trigger = m_task_manager.GetTrigger(task_id);
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/* Free the task. */
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m_task_manager.FreeTask(task_id);
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/* Check that we didn't hit a disconnect. */
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R_UNLESS(trigger != EventTrigger_Disconnect, htclow::ResultInvalidChannelStateDisconnected());
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return ResultSuccess();
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}
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Result Mux::WaitReceiveBegin(u32 *out_task_id, impl::ChannelInternalType channel, size_t size) {
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return this->ReceiveBegin(out_task_id, channel, size);
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}
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Result Mux::WaitReceiveEnd(u32 task_id) {
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/* Lock ourselves. */
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std::scoped_lock lk(m_mutex);
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/* Get the trigger for the task. */
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const auto trigger = m_task_manager.GetTrigger(task_id);
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/* Free the task. */
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m_task_manager.FreeTask(task_id);
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/* Check that we didn't hit a disconnect. */
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R_UNLESS(trigger != EventTrigger_Disconnect, htclow::ResultInvalidChannelStateDisconnected());
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return ResultSuccess();
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}
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void Mux::SetConfig(impl::ChannelInternalType channel, const ChannelConfig &config) {
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/* Lock ourselves. */
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std::scoped_lock lk(m_mutex);
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/* Find the channel. */
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auto it = m_channel_impl_map.GetMap().find(channel);
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AMS_ABORT_UNLESS(it != m_channel_impl_map.GetMap().end());
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/* Perform the connection. */
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return m_channel_impl_map[it->second].SetConfig(config);
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}
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void Mux::SetSendBuffer(impl::ChannelInternalType channel, void *buf, size_t buf_size, size_t max_packet_size) {
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/* Lock ourselves. */
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std::scoped_lock lk(m_mutex);
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/* Find the channel. */
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auto it = m_channel_impl_map.GetMap().find(channel);
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AMS_ABORT_UNLESS(it != m_channel_impl_map.GetMap().end());
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/* Set the send buffer. */
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m_channel_impl_map[it->second].SetSendBuffer(buf, buf_size, max_packet_size);
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}
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void Mux::SetSendBufferWithData(impl::ChannelInternalType channel, const void *buf, size_t buf_size, size_t max_packet_size) {
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/* Lock ourselves. */
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std::scoped_lock lk(m_mutex);
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/* Find the channel. */
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auto it = m_channel_impl_map.GetMap().find(channel);
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AMS_ABORT_UNLESS(it != m_channel_impl_map.GetMap().end());
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/* Set the send buffer. */
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m_channel_impl_map[it->second].SetSendBufferWithData(buf, buf_size, max_packet_size);
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}
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void Mux::SetReceiveBuffer(impl::ChannelInternalType channel, void *buf, size_t buf_size) {
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/* Lock ourselves. */
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std::scoped_lock lk(m_mutex);
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/* Find the channel. */
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auto it = m_channel_impl_map.GetMap().find(channel);
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AMS_ABORT_UNLESS(it != m_channel_impl_map.GetMap().end());
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/* Set the send buffer. */
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m_channel_impl_map[it->second].SetReceiveBuffer(buf, buf_size);
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}
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Result Mux::Shutdown(impl::ChannelInternalType channel) {
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/* Lock ourselves. */
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std::scoped_lock lk(m_mutex);
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/* Find the channel. */
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auto it = m_channel_impl_map.GetMap().find(channel);
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R_UNLESS(it != m_channel_impl_map.GetMap().end(), htclow::ResultChannelNotExist());
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/* Perform the shutdown. */
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return m_channel_impl_map[it->second].DoShutdown();
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}
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}
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