mirror of
https://github.com/citra-emu/citra-canary.git
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134 lines
4.3 KiB
C++
134 lines
4.3 KiB
C++
#include "common/logging/log.h"
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#include "core/arm/arm_interface.h"
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#include "core/core.h"
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#include "core/hle/kernel/process.h"
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#include "core/memory.h"
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#include "core/rpc/packet.h"
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#include "core/rpc/rpc_server.h"
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namespace RPC {
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RPCServer::RPCServer() : server(*this) {
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LOG_INFO(RPC_Server, "Starting RPC server ...");
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Start();
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LOG_INFO(RPC_Server, "RPC started.");
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}
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RPCServer::~RPCServer() {
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LOG_INFO(RPC_Server, "Stopping RPC ...");
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Stop();
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LOG_INFO(RPC_Server, "RPC stopped.");
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}
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void RPCServer::HandleReadMemory(Packet& packet, u32 address, u32 data_size) {
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if (data_size > MAX_READ_SIZE) {
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return;
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}
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// Note: Memory read occurs asynchronously from the state of the emulator
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Core::System::GetInstance().Memory().ReadBlock(
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*Core::System::GetInstance().Kernel().GetCurrentProcess(), address,
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packet.GetPacketData().data(), data_size);
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packet.SetPacketDataSize(data_size);
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packet.SendReply();
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}
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void RPCServer::HandleWriteMemory(Packet& packet, u32 address, const u8* data, u32 data_size) {
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// Only allow writing to certain memory regions
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if ((address >= Memory::PROCESS_IMAGE_VADDR && address <= Memory::PROCESS_IMAGE_VADDR_END) ||
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(address >= Memory::HEAP_VADDR && address <= Memory::HEAP_VADDR_END) ||
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(address >= Memory::N3DS_EXTRA_RAM_VADDR && address <= Memory::N3DS_EXTRA_RAM_VADDR_END)) {
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// Note: Memory write occurs asynchronously from the state of the emulator
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Core::System::GetInstance().Memory().WriteBlock(
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*Core::System::GetInstance().Kernel().GetCurrentProcess(), address, data, data_size);
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// If the memory happens to be executable code, make sure the changes become visible
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Core::CPU().InvalidateCacheRange(address, data_size);
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}
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packet.SetPacketDataSize(0);
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packet.SendReply();
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}
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bool RPCServer::ValidatePacket(const PacketHeader& packet_header) {
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if (packet_header.version <= CURRENT_VERSION) {
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switch (packet_header.packet_type) {
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case PacketType::ReadMemory:
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case PacketType::WriteMemory:
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if (packet_header.packet_size >= (sizeof(u32) * 2)) {
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return true;
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}
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break;
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default:
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break;
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}
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}
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return false;
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}
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void RPCServer::HandleSingleRequest(std::unique_ptr<Packet> request_packet) {
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bool success = false;
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if (ValidatePacket(request_packet->GetHeader())) {
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// Currently, all request types use the address/data_size wire format
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u32 address = 0;
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u32 data_size = 0;
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std::memcpy(&address, request_packet->GetPacketData().data(), sizeof(address));
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std::memcpy(&data_size, request_packet->GetPacketData().data() + sizeof(address),
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sizeof(data_size));
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switch (request_packet->GetPacketType()) {
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case PacketType::ReadMemory:
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if (data_size > 0 && data_size <= MAX_READ_SIZE) {
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HandleReadMemory(*request_packet, address, data_size);
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success = true;
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}
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break;
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case PacketType::WriteMemory:
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if (data_size > 0 && data_size <= MAX_PACKET_DATA_SIZE - (sizeof(u32) * 2)) {
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const u8* data = request_packet->GetPacketData().data() + (sizeof(u32) * 2);
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HandleWriteMemory(*request_packet, address, data, data_size);
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success = true;
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}
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break;
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default:
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break;
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}
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}
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if (!success) {
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// Send an empty reply, so as not to hang the client
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request_packet->SetPacketDataSize(0);
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request_packet->SendReply();
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}
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}
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void RPCServer::HandleRequestsLoop() {
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std::unique_ptr<RPC::Packet> request_packet;
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LOG_INFO(RPC_Server, "Request handler started.");
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while ((request_packet = request_queue.PopWait())) {
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HandleSingleRequest(std::move(request_packet));
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}
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}
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void RPCServer::QueueRequest(std::unique_ptr<RPC::Packet> request) {
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request_queue.Push(std::move(request));
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}
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void RPCServer::Start() {
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const auto threadFunction = [this]() { HandleRequestsLoop(); };
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request_handler_thread = std::thread(threadFunction);
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server.Start();
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}
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void RPCServer::Stop() {
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server.Stop();
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request_handler_thread.join();
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}
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}; // namespace RPC
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