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// Copyright 2017 Citra Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#include <boost/range/algorithm_ext/erase.hpp>
#include "common/assert.h"
#include "common/common_types.h"
#include "core/hle/ipc_helpers.h"
#include "core/hle/kernel/handle_table.h"
#include "core/hle/kernel/hle_ipc.h"
#include "core/hle/kernel/kernel.h"
#include "core/hle/kernel/process.h"
#include "core/hle/kernel/server_session.h"
namespace Kernel {
void SessionRequestHandler::ClientConnected(SharedPtr<ServerSession> server_session) {
server_session->SetHleHandler(shared_from_this());
connected_sessions.push_back(server_session);
}
void SessionRequestHandler::ClientDisconnected(SharedPtr<ServerSession> server_session) {
server_session->SetHleHandler(nullptr);
boost::range::remove_erase(connected_sessions, server_session);
}
HLERequestContext::HLERequestContext(SharedPtr<ServerSession> session)
: session(std::move(session)) {
cmd_buf[0] = 0;
}
HLERequestContext::~HLERequestContext() = default;
SharedPtr<Object> HLERequestContext::GetIncomingHandle(u32 id_from_cmdbuf) const {
ASSERT(id_from_cmdbuf < request_handles.size());
return request_handles[id_from_cmdbuf];
}
u32 HLERequestContext::AddOutgoingHandle(SharedPtr<Object> object) {
request_handles.push_back(std::move(object));
return static_cast<u32>(request_handles.size() - 1);
}
void HLERequestContext::ClearIncomingObjects() {
request_handles.clear();
}
void HLERequestContext::ParseCommandBuffer(u32_le* src_cmdbuf) {
IPC::RequestParser rp(src_cmdbuf);
command_header = std::make_unique<IPC::CommandHeader>(rp.PopRaw<IPC::CommandHeader>());
// If handle descriptor is present, add size of it
if (command_header->enable_handle_descriptor) {
handle_descriptor_header =
std::make_unique<IPC::HandleDescriptorHeader>(rp.PopRaw<IPC::HandleDescriptorHeader>());
if (handle_descriptor_header->send_current_pid) {
rp.Skip(2, false);
}
rp.Skip(handle_descriptor_header->num_handles_to_copy, false);
rp.Skip(handle_descriptor_header->num_handles_to_move, false);
}
// Padding to align to 16 bytes
rp.AlignWithPadding();
if (command_header->num_buf_x_descriptors) {
UNIMPLEMENTED();
}
if (command_header->num_buf_a_descriptors) {
UNIMPLEMENTED();
}
if (command_header->num_buf_b_descriptors) {
UNIMPLEMENTED();
}
if (command_header->num_buf_w_descriptors) {
UNIMPLEMENTED();
}
if (command_header->buf_c_descriptor_flags !=
IPC::CommandHeader::BufferDescriptorCFlag::Disabled) {
UNIMPLEMENTED();
}
data_payload_header =
std::make_unique<IPC::DataPayloadHeader>(rp.PopRaw<IPC::DataPayloadHeader>());
ASSERT(data_payload_header->magic == 0x49434653 || data_payload_header->magic == 0x4F434653);
data_payload_offset = rp.GetCurrentOffset();
command = rp.Pop<u32_le>();
}
ResultCode HLERequestContext::PopulateFromIncomingCommandBuffer(u32_le* src_cmdbuf,
Process& src_process,
HandleTable& src_table) {
ParseCommandBuffer(src_cmdbuf);
size_t untranslated_size = data_payload_offset + command_header->data_size;
std::copy_n(src_cmdbuf, untranslated_size, cmd_buf.begin());
if (command_header->enable_handle_descriptor) {
if (handle_descriptor_header->num_handles_to_copy ||
handle_descriptor_header->num_handles_to_move) {
UNIMPLEMENTED();
}
}
return RESULT_SUCCESS;
}
ResultCode HLERequestContext::WriteToOutgoingCommandBuffer(u32_le* dst_cmdbuf, Process& dst_process,
HandleTable& dst_table) {
ParseCommandBuffer(&cmd_buf[0]);
size_t untranslated_size = data_payload_offset + command_header->data_size;
std::copy_n(cmd_buf.begin(), untranslated_size, dst_cmdbuf);
if (command_header->enable_handle_descriptor) {
size_t command_size = untranslated_size + handle_descriptor_header->num_handles_to_copy +
handle_descriptor_header->num_handles_to_move;
ASSERT(command_size <= IPC::COMMAND_BUFFER_LENGTH);
size_t untranslated_index = untranslated_size;
size_t handle_write_offset = 3;
while (untranslated_index < command_size) {
u32 descriptor = cmd_buf[untranslated_index];
untranslated_index += 1;
switch (IPC::GetDescriptorType(descriptor)) {
case IPC::DescriptorType::CopyHandle:
case IPC::DescriptorType::MoveHandle: {
// HLE services don't use handles, so we treat both CopyHandle and MoveHandle
// equally
u32 num_handles = IPC::HandleNumberFromDesc(descriptor);
for (u32 j = 0; j < num_handles; ++j) {
SharedPtr<Object> object = GetIncomingHandle(cmd_buf[untranslated_index]);
Handle handle = 0;
if (object != nullptr) {
// TODO(yuriks): Figure out the proper error handling for if this fails
handle = dst_table.Create(object).Unwrap();
}
dst_cmdbuf[handle_write_offset++] = handle;
untranslated_index++;
}
break;
}
default:
UNIMPLEMENTED_MSG("Unsupported handle translation: 0x%08X", descriptor);
}
}
}
return RESULT_SUCCESS;
}
} // namespace Kernel
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