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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/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 request_handles.size() - 1;
}
void HLERequestContext::ClearIncomingObjects() {
request_handles.clear();
}
ResultCode HLERequestContext::PopulateFromIncomingCommandBuffer(const u32_le* src_cmdbuf,
Process& src_process,
HandleTable& src_table) {
IPC::Header header{src_cmdbuf[0]};
size_t untranslated_size = 1u + header.normal_params_size;
size_t command_size = untranslated_size + header.translate_params_size;
ASSERT(command_size <= IPC::COMMAND_BUFFER_LENGTH); // TODO(yuriks): Return error
std::copy_n(src_cmdbuf, untranslated_size, cmd_buf.begin());
size_t i = untranslated_size;
while (i < command_size) {
u32 descriptor = cmd_buf[i] = src_cmdbuf[i];
i += 1;
switch (IPC::GetDescriptorType(descriptor)) {
case IPC::DescriptorType::CopyHandle:
case IPC::DescriptorType::MoveHandle: {
u32 num_handles = IPC::HandleNumberFromDesc(descriptor);
ASSERT(i + num_handles <= command_size); // TODO(yuriks): Return error
for (u32 j = 0; j < num_handles; ++j) {
Handle handle = src_cmdbuf[i];
SharedPtr<Object> object = nullptr;
if (handle != 0) {
object = src_table.GetGeneric(handle);
ASSERT(object != nullptr); // TODO(yuriks): Return error
if (descriptor == IPC::DescriptorType::MoveHandle) {
src_table.Close(handle);
}
}
cmd_buf[i++] = AddOutgoingHandle(std::move(object));
}
break;
}
case IPC::DescriptorType::CallingPid: {
cmd_buf[i++] = src_process.process_id;
break;
}
default:
UNIMPLEMENTED_MSG("Unsupported handle translation: 0x%08X", descriptor);
}
}
return RESULT_SUCCESS;
}
ResultCode HLERequestContext::WriteToOutgoingCommandBuffer(u32_le* dst_cmdbuf, Process& dst_process,
HandleTable& dst_table) const {
IPC::Header header{cmd_buf[0]};
size_t untranslated_size = 1u + header.normal_params_size;
size_t command_size = untranslated_size + header.translate_params_size;
ASSERT(command_size <= IPC::COMMAND_BUFFER_LENGTH);
std::copy_n(cmd_buf.begin(), untranslated_size, dst_cmdbuf);
size_t i = untranslated_size;
while (i < command_size) {
u32 descriptor = dst_cmdbuf[i] = cmd_buf[i];
i += 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);
ASSERT(i + num_handles <= command_size);
for (u32 j = 0; j < num_handles; ++j) {
SharedPtr<Object> object = GetIncomingHandle(cmd_buf[i]);
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[i++] = handle;
}
break;
}
default:
UNIMPLEMENTED_MSG("Unsupported handle translation: 0x%08X", descriptor);
}
}
return RESULT_SUCCESS;
}
} // namespace Kernel
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