mirror of
https://github.com/Atmosphere-NX/Atmosphere.git
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96f95b9f95
* result: try out some experimental shenanigans * result: sketch out some more shenanigans * result: see what it looks like to convert kernel to use result conds instead of guards * make rest of kernel use experimental new macro-ing
206 lines
8.4 KiB
C++
206 lines
8.4 KiB
C++
/*
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* Copyright (c) Atmosphère-NX
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <mesosphere.hpp>
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namespace ams::kern::svc {
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/* ============================= Common ============================= */
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namespace {
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Result ManageNamedPort(ams::svc::Handle *out_server_handle, KUserPointer<const char *> user_name, s32 max_sessions) {
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/* Copy the provided name from user memory to kernel memory. */
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char name[KObjectName::NameLengthMax] = {};
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R_TRY(user_name.CopyStringTo(name, sizeof(name)));
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/* Validate that sessions and name are valid. */
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R_UNLESS(max_sessions >= 0, svc::ResultOutOfRange());
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R_UNLESS(name[sizeof(name) - 1] == '\x00', svc::ResultOutOfRange());
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if (max_sessions > 0) {
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/* Get the current handle table. */
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auto &handle_table = GetCurrentProcess().GetHandleTable();
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/* Create a new port. */
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KPort *port = KPort::Create();
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R_UNLESS(port != nullptr, svc::ResultOutOfResource());
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/* Initialize the new port. */
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port->Initialize(max_sessions, false, 0);
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/* Register the port. */
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KPort::Register(port);
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/* Ensure that our only reference to the port is in the handle table when we're done. */
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ON_SCOPE_EXIT {
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port->GetClientPort().Close();
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port->GetServerPort().Close();
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};
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/* Register the handle in the table. */
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R_TRY(handle_table.Add(out_server_handle, std::addressof(port->GetServerPort())));
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ON_RESULT_FAILURE { handle_table.Remove(*out_server_handle); };
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/* Create a new object name. */
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R_TRY(KObjectName::NewFromName(std::addressof(port->GetClientPort()), name));
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} else /* if (max_sessions == 0) */ {
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/* Ensure that this else case is correct. */
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MESOSPHERE_AUDIT(max_sessions == 0);
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/* If we're closing, there's no server handle. */
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*out_server_handle = ams::svc::InvalidHandle;
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/* Delete the object. */
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R_TRY(KObjectName::Delete<KClientPort>(name));
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}
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R_SUCCEED();
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}
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Result CreatePort(ams::svc::Handle *out_server, ams::svc::Handle *out_client, int32_t max_sessions, bool is_light, uintptr_t name) {
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/* Ensure max sessions is valid. */
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R_UNLESS(max_sessions > 0, svc::ResultOutOfRange());
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/* Get the current handle table. */
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auto &handle_table = GetCurrentProcess().GetHandleTable();
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/* Create a new port. */
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KPort *port = KPort::Create();
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R_UNLESS(port != nullptr, svc::ResultOutOfResource());
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/* Initialize the port. */
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port->Initialize(max_sessions, is_light, name);
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/* Ensure that we clean up the port (and its only references are handle table) on function end. */
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ON_SCOPE_EXIT {
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port->GetServerPort().Close();
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port->GetClientPort().Close();
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};
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/* Register the port. */
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KPort::Register(port);
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/* Add the client to the handle table. */
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R_TRY(handle_table.Add(out_client, std::addressof(port->GetClientPort())));
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/* Ensure that we maintaing a clean handle state on exit. */
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ON_RESULT_FAILURE { handle_table.Remove(*out_client); };
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/* Add the server to the handle table. */
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R_RETURN(handle_table.Add(out_server, std::addressof(port->GetServerPort())));
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}
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Result ConnectToNamedPort(ams::svc::Handle *out, KUserPointer<const char *> user_name) {
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/* Copy the provided name from user memory to kernel memory. */
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char name[KObjectName::NameLengthMax] = {};
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R_TRY(user_name.CopyStringTo(name, sizeof(name)));
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/* Validate that name is valid. */
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R_UNLESS(name[sizeof(name) - 1] == '\x00', svc::ResultOutOfRange());
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/* Get the current handle table. */
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auto &handle_table = GetCurrentProcess().GetHandleTable();
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/* Find the client port. */
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auto port = KObjectName::Find<KClientPort>(name);
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R_UNLESS(port.IsNotNull(), svc::ResultNotFound());
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/* Reserve a handle for the port. */
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/* NOTE: Nintendo really does write directly to the output handle here. */
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R_TRY(handle_table.Reserve(out));
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ON_RESULT_FAILURE { handle_table.Unreserve(*out); };
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/* Create a session. */
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KClientSession *session;
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R_TRY(port->CreateSession(std::addressof(session)));
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/* Register the session in the table, close the extra reference. */
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handle_table.Register(*out, session);
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session->Close();
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/* We succeeded. */
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R_SUCCEED();
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}
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Result ConnectToPort(ams::svc::Handle *out, ams::svc::Handle port) {
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/* Get the current handle table. */
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auto &handle_table = GetCurrentProcess().GetHandleTable();
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/* Get the client port. */
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KScopedAutoObject client_port = handle_table.GetObject<KClientPort>(port);
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R_UNLESS(client_port.IsNotNull(), svc::ResultInvalidHandle());
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/* Reserve a handle for the port. */
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/* NOTE: Nintendo really does write directly to the output handle here. */
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R_TRY(handle_table.Reserve(out));
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ON_RESULT_FAILURE { handle_table.Unreserve(*out); };
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/* Create the session. */
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KAutoObject *session;
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if (client_port->IsLight()) {
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R_TRY(client_port->CreateLightSession(reinterpret_cast<KLightClientSession **>(std::addressof(session))));
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} else {
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R_TRY(client_port->CreateSession(reinterpret_cast<KClientSession **>(std::addressof(session))));
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}
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/* Register the session. */
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handle_table.Register(*out, session);
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session->Close();
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/* We succeeded. */
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R_SUCCEED();
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}
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}
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/* ============================= 64 ABI ============================= */
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Result ConnectToNamedPort64(ams::svc::Handle *out_handle, KUserPointer<const char *> name) {
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R_RETURN(ConnectToNamedPort(out_handle, name));
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}
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Result CreatePort64(ams::svc::Handle *out_server_handle, ams::svc::Handle *out_client_handle, int32_t max_sessions, bool is_light, ams::svc::Address name) {
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R_RETURN(CreatePort(out_server_handle, out_client_handle, max_sessions, is_light, name));
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}
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Result ManageNamedPort64(ams::svc::Handle *out_server_handle, KUserPointer<const char *> name, int32_t max_sessions) {
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R_RETURN(ManageNamedPort(out_server_handle, name, max_sessions));
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}
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Result ConnectToPort64(ams::svc::Handle *out_handle, ams::svc::Handle port) {
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R_RETURN(ConnectToPort(out_handle, port));
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}
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/* ============================= 64From32 ABI ============================= */
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Result ConnectToNamedPort64From32(ams::svc::Handle *out_handle, KUserPointer<const char *> name) {
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R_RETURN(ConnectToNamedPort(out_handle, name));
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}
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Result CreatePort64From32(ams::svc::Handle *out_server_handle, ams::svc::Handle *out_client_handle, int32_t max_sessions, bool is_light, ams::svc::Address name) {
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R_RETURN(CreatePort(out_server_handle, out_client_handle, max_sessions, is_light, name));
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}
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Result ManageNamedPort64From32(ams::svc::Handle *out_server_handle, KUserPointer<const char *> name, int32_t max_sessions) {
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R_RETURN(ManageNamedPort(out_server_handle, name, max_sessions));
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}
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Result ConnectToPort64From32(ams::svc::Handle *out_handle, ams::svc::Handle port) {
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R_RETURN(ConnectToPort(out_handle, port));
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}
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}
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