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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_light_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 {
Result ConnectToNamedPort(Core::System& system, Handle* out, u64 user_name) {
// Copy the provided name from user memory to kernel memory.
auto string_name =
GetCurrentMemory(system.Kernel()).ReadCString(user_name, KObjectName::NameLengthMax);
std::array<char, KObjectName::NameLengthMax> name{};
std::strncpy(name.data(), string_name.c_str(), KObjectName::NameLengthMax - 1);
// Validate that the name is valid.
R_UNLESS(name[sizeof(name) - 1] == '\x00', ResultOutOfRange);
// Get the current handle table.
auto& handle_table = GetCurrentProcess(system.Kernel()).GetHandleTable();
// Find the client port.
auto port = KObjectName::Find<KClientPort>(system.Kernel(), name.data());
R_UNLESS(port.IsNotNull(), ResultNotFound);
// Reserve a handle for the port.
// NOTE: Nintendo really does write directly to the output handle here.
R_TRY(handle_table.Reserve(out));
ON_RESULT_FAILURE {
handle_table.Unreserve(*out);
};
// Create a session.
KClientSession* session;
R_TRY(port->CreateSession(std::addressof(session)));
// Register the session in the table, close the extra reference.
handle_table.Register(*out, session);
session->Close();
// We succeeded.
R_SUCCEED();
}
Result CreatePort(Core::System& system, Handle* out_server, Handle* out_client,
int32_t max_sessions, bool is_light, uint64_t name) {
auto& kernel = system.Kernel();
// Ensure max sessions is valid.
R_UNLESS(max_sessions > 0, ResultOutOfRange);
// Get the current handle table.
auto& handle_table = GetCurrentProcess(kernel).GetHandleTable();
// Create a new port.
KPort* port = KPort::Create(kernel);
R_UNLESS(port != nullptr, ResultOutOfResource);
// Initialize the port.
port->Initialize(max_sessions, is_light, name);
// Ensure that we clean up the port (and its only references are handle table) on function end.
SCOPE_EXIT {
port->GetServerPort().Close();
port->GetClientPort().Close();
};
// Register the port.
KPort::Register(kernel, port);
// Add the client to the handle table.
R_TRY(handle_table.Add(out_client, std::addressof(port->GetClientPort())));
// Ensure that we maintain a clean handle state on exit.
ON_RESULT_FAILURE {
handle_table.Remove(*out_client);
};
// Add the server to the handle table.
R_RETURN(handle_table.Add(out_server, std::addressof(port->GetServerPort())));
}
Result ConnectToPort(Core::System& system, Handle* out, Handle port) {
// Get the current handle table.
auto& handle_table = GetCurrentProcess(system.Kernel()).GetHandleTable();
// Get the client port.
KScopedAutoObject client_port = handle_table.GetObject<KClientPort>(port);
R_UNLESS(client_port.IsNotNull(), ResultInvalidHandle);
// Reserve a handle for the port.
// NOTE: Nintendo really does write directly to the output handle here.
R_TRY(handle_table.Reserve(out));
ON_RESULT_FAILURE {
handle_table.Unreserve(*out);
};
// Create the session.
KAutoObject* session;
if (client_port->IsLight()) {
R_TRY(client_port->CreateLightSession(
reinterpret_cast<KLightClientSession**>(std::addressof(session))));
} else {
R_TRY(client_port->CreateSession(
reinterpret_cast<KClientSession**>(std::addressof(session))));
}
// Register the session.
handle_table.Register(*out, session);
session->Close();
// We succeeded.
R_SUCCEED();
}
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.
auto string_name =
GetCurrentMemory(system.Kernel()).ReadCString(user_name, KObjectName::NameLengthMax);
// Copy the provided name from user memory to kernel memory.
std::array<char, KObjectName::NameLengthMax> name{};
std::strncpy(name.data(), string_name.c_str(), KObjectName::NameLengthMax - 1);
// 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, 0);
// 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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