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// SPDX-FileCopyrightText: Copyright 2023 yuzu Emulator Project
// SPDX-License-Identifier: GPL-2.0-or-later
#include "common/scope_exit.h"
#include "core/core.h"
#include "core/hle/kernel/k_client_port.h"
#include "core/hle/kernel/k_client_session.h"
#include "core/hle/kernel/k_object_name.h"
#include "core/hle/kernel/k_port.h"
#include "core/hle/kernel/k_process.h"
#include "core/hle/kernel/svc.h"
namespace Kernel::Svc {
/// Connect to an OS service given the port name, returns the handle to the port to out
Result ConnectToNamedPort(Core::System& system, Handle* out, VAddr port_name_address) {
auto& memory = system.Memory();
if (!memory.IsValidVirtualAddress(port_name_address)) {
LOG_ERROR(Kernel_SVC,
"Port Name Address is not a valid virtual address, port_name_address=0x{:016X}",
port_name_address);
return ResultNotFound;
}
static constexpr std::size_t PortNameMaxLength = 11;
// Read 1 char beyond the max allowed port name to detect names that are too long.
const std::string port_name = memory.ReadCString(port_name_address, PortNameMaxLength + 1);
if (port_name.size() > PortNameMaxLength) {
LOG_ERROR(Kernel_SVC, "Port name is too long, expected {} but got {}", PortNameMaxLength,
port_name.size());
return ResultOutOfRange;
}
LOG_TRACE(Kernel_SVC, "called port_name={}", port_name);
// Get the current handle table.
auto& kernel = system.Kernel();
auto& handle_table = GetCurrentProcess(kernel).GetHandleTable();
// Find the client port.
auto port = kernel.CreateNamedServicePort(port_name);
if (!port) {
LOG_ERROR(Kernel_SVC, "tried to connect to unknown port: {}", port_name);
return ResultNotFound;
}
// Reserve a handle for the port.
// NOTE: Nintendo really does write directly to the output handle here.
R_TRY(handle_table.Reserve(out));
auto handle_guard = SCOPE_GUARD({ handle_table.Unreserve(*out); });
// Create a session.
KClientSession* session{};
R_TRY(port->CreateSession(std::addressof(session)));
kernel.RegisterNamedServiceHandler(port_name, &port->GetParent()->GetServerPort());
// Register the session in the table, close the extra reference.
handle_table.Register(*out, session);
session->Close();
// We succeeded.
handle_guard.Cancel();
return ResultSuccess;
}
Result CreatePort(Core::System& system, Handle* out_server, Handle* out_client,
int32_t max_sessions, bool is_light, uintptr_t name) {
UNIMPLEMENTED();
R_THROW(ResultNotImplemented);
}
Result ConnectToPort(Core::System& system, Handle* out_handle, Handle port) {
UNIMPLEMENTED();
R_THROW(ResultNotImplemented);
}
Result ManageNamedPort(Core::System& system, Handle* out_server_handle, uint64_t user_name,
int32_t max_sessions) {
// Copy the provided name from user memory to kernel memory.
std::array<char, KObjectName::NameLengthMax> name{};
system.Memory().ReadBlock(user_name, name.data(), sizeof(name));
// Validate that sessions and name are valid.
R_UNLESS(max_sessions >= 0, ResultOutOfRange);
R_UNLESS(name[sizeof(name) - 1] == '\x00', ResultOutOfRange);
if (max_sessions > 0) {
// Get the current handle table.
auto& handle_table = GetCurrentProcess(system.Kernel()).GetHandleTable();
// Create a new port.
KPort* port = KPort::Create(system.Kernel());
R_UNLESS(port != nullptr, ResultOutOfResource);
// Initialize the new port.
port->Initialize(max_sessions, false, "");
// Register the port.
KPort::Register(system.Kernel(), port);
// Ensure that our only reference to the port is in the handle table when we're done.
SCOPE_EXIT({
port->GetClientPort().Close();
port->GetServerPort().Close();
});
// Register the handle in the table.
R_TRY(handle_table.Add(out_server_handle, std::addressof(port->GetServerPort())));
ON_RESULT_FAILURE {
handle_table.Remove(*out_server_handle);
};
// Create a new object name.
R_TRY(KObjectName::NewFromName(system.Kernel(), std::addressof(port->GetClientPort()),
name.data()));
} else /* if (max_sessions == 0) */ {
// Ensure that this else case is correct.
ASSERT(max_sessions == 0);
// If we're closing, there's no server handle.
*out_server_handle = InvalidHandle;
// Delete the object.
R_TRY(KObjectName::Delete<KClientPort>(system.Kernel(), name.data()));
}
R_SUCCEED();
}
Result ConnectToNamedPort64(Core::System& system, Handle* out_handle, uint64_t name) {
R_RETURN(ConnectToNamedPort(system, out_handle, name));
}
Result CreatePort64(Core::System& system, Handle* out_server_handle, Handle* out_client_handle,
int32_t max_sessions, bool is_light, uint64_t name) {
R_RETURN(
CreatePort(system, out_server_handle, out_client_handle, max_sessions, is_light, name));
}
Result ManageNamedPort64(Core::System& system, Handle* out_server_handle, uint64_t name,
int32_t max_sessions) {
R_RETURN(ManageNamedPort(system, out_server_handle, name, max_sessions));
}
Result ConnectToPort64(Core::System& system, Handle* out_handle, Handle port) {
R_RETURN(ConnectToPort(system, out_handle, port));
}
Result ConnectToNamedPort64From32(Core::System& system, Handle* out_handle, uint32_t name) {
R_RETURN(ConnectToNamedPort(system, out_handle, name));
}
Result CreatePort64From32(Core::System& system, Handle* out_server_handle,
Handle* out_client_handle, int32_t max_sessions, bool is_light,
uint32_t name) {
R_RETURN(
CreatePort(system, out_server_handle, out_client_handle, max_sessions, is_light, name));
}
Result ManageNamedPort64From32(Core::System& system, Handle* out_server_handle, uint32_t name,
int32_t max_sessions) {
R_RETURN(ManageNamedPort(system, out_server_handle, name, max_sessions));
}
Result ConnectToPort64From32(Core::System& system, Handle* out_handle, Handle port) {
R_RETURN(ConnectToPort(system, out_handle, port));
}
} // namespace Kernel::Svc
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