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/**
* (C) 2016 - 2017 KISTLER INSTRUMENTE AG, Winterthur, Switzerland
* (C) 2016 - 2019 Stanislav Angelovic <angelovic.s@gmail.com>
*
* @file Message.cpp
*
* Created on: Nov 9, 2016
* Project: sdbus-c++
* Description: High-level D-Bus IPC C++ library based on sd-bus
*
* This file is part of sdbus-c++.
*
* sdbus-c++ is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 2.1 of the License, or
* (at your option) any later version.
*
* sdbus-c++ is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with sdbus-c++. If not, see <http://www.gnu.org/licenses/>.
*/
#include <sdbus-c++/Message.h>
#include <sdbus-c++/Types.h>
#include <sdbus-c++/Error.h>
#include "MessageUtils.h"
#include "ISdBus.h"
#include "IConnection.h"
#include "ScopeGuard.h"
#include <systemd/sd-bus.h>
#include <cassert>
namespace sdbus {
Message::Message(internal::ISdBus* sdbus) noexcept
: sdbus_(sdbus)
{
assert(sdbus_ != nullptr);
}
Message::Message(void *msg, internal::ISdBus* sdbus) noexcept
: msg_(msg)
, sdbus_(sdbus)
{
assert(msg_ != nullptr);
assert(sdbus_ != nullptr);
sdbus_->sd_bus_message_ref((sd_bus_message*)msg_);
}
Message::Message(void *msg, internal::ISdBus* sdbus, adopt_message_t) noexcept
: msg_(msg)
, sdbus_(sdbus)
{
assert(msg_ != nullptr);
assert(sdbus_ != nullptr);
}
Message::Message(const Message& other) noexcept
{
*this = other;
}
Message& Message::operator=(const Message& other) noexcept
{
if (msg_)
sdbus_->sd_bus_message_unref((sd_bus_message*)msg_);
msg_ = other.msg_;
sdbus_ = other.sdbus_;
ok_ = other.ok_;
sdbus_->sd_bus_message_ref((sd_bus_message*)msg_);
return *this;
}
Message::Message(Message&& other) noexcept
{
*this = std::move(other);
}
Message& Message::operator=(Message&& other) noexcept
{
if (msg_)
sdbus_->sd_bus_message_unref((sd_bus_message*)msg_);
msg_ = other.msg_;
other.msg_ = nullptr;
sdbus_ = other.sdbus_;
other.sdbus_ = nullptr;
ok_ = other.ok_;
other.ok_ = true;
return *this;
}
Message::~Message()
{
if (msg_)
sdbus_->sd_bus_message_unref((sd_bus_message*)msg_);
}
Message& Message::operator<<(bool item)
{
int intItem = item;
auto r = sd_bus_message_append_basic((sd_bus_message*)msg_, SD_BUS_TYPE_BOOLEAN, &intItem);
SDBUS_THROW_ERROR_IF(r < 0, "Failed to serialize a bool value", -r);
return *this;
}
Message& Message::operator<<(int16_t item)
{
auto r = sd_bus_message_append_basic((sd_bus_message*)msg_, SD_BUS_TYPE_INT16, &item);
SDBUS_THROW_ERROR_IF(r < 0, "Failed to serialize a int16_t value", -r);
return *this;
}
Message& Message::operator<<(int32_t item)
{
auto r = sd_bus_message_append_basic((sd_bus_message*)msg_, SD_BUS_TYPE_INT32, &item);
SDBUS_THROW_ERROR_IF(r < 0, "Failed to serialize a int32_t value", -r);
return *this;
}
Message& Message::operator<<(int64_t item)
{
auto r = sd_bus_message_append_basic((sd_bus_message*)msg_, SD_BUS_TYPE_INT64, &item);
SDBUS_THROW_ERROR_IF(r < 0, "Failed to serialize a int64_t value", -r);
return *this;
}
Message& Message::operator<<(uint8_t item)
{
auto r = sd_bus_message_append_basic((sd_bus_message*)msg_, SD_BUS_TYPE_BYTE, &item);
SDBUS_THROW_ERROR_IF(r < 0, "Failed to serialize a byte value", -r);
return *this;
}
Message& Message::operator<<(uint16_t item)
{
auto r = sd_bus_message_append_basic((sd_bus_message*)msg_, SD_BUS_TYPE_UINT16, &item);
SDBUS_THROW_ERROR_IF(r < 0, "Failed to serialize a uint16_t value", -r);
return *this;
}
Message& Message::operator<<(uint32_t item)
{
auto r = sd_bus_message_append_basic((sd_bus_message*)msg_, SD_BUS_TYPE_UINT32, &item);
SDBUS_THROW_ERROR_IF(r < 0, "Failed to serialize a uint32_t value", -r);
return *this;
}
Message& Message::operator<<(uint64_t item)
{
auto r = sd_bus_message_append_basic((sd_bus_message*)msg_, SD_BUS_TYPE_UINT64, &item);
SDBUS_THROW_ERROR_IF(r < 0, "Failed to serialize a uint64_t value", -r);
return *this;
}
Message& Message::operator<<(double item)
{
auto r = sd_bus_message_append_basic((sd_bus_message*)msg_, SD_BUS_TYPE_DOUBLE, &item);
SDBUS_THROW_ERROR_IF(r < 0, "Failed to serialize a double value", -r);
return *this;
}
Message& Message::operator<<(const char* item)
{
auto r = sd_bus_message_append_basic((sd_bus_message*)msg_, SD_BUS_TYPE_STRING, item);
SDBUS_THROW_ERROR_IF(r < 0, "Failed to serialize a C-string value", -r);
return *this;
}
Message& Message::operator<<(const std::string& item)
{
auto r = sd_bus_message_append_basic((sd_bus_message*)msg_, SD_BUS_TYPE_STRING, item.c_str());
SDBUS_THROW_ERROR_IF(r < 0, "Failed to serialize a string value", -r);
return *this;
}
Message& Message::operator<<(const Variant &item)
{
item.serializeTo(*this);
return *this;
}
Message& Message::operator<<(const ObjectPath &item)
{
auto r = sd_bus_message_append_basic((sd_bus_message*)msg_, SD_BUS_TYPE_OBJECT_PATH, item.c_str());
SDBUS_THROW_ERROR_IF(r < 0, "Failed to serialize an ObjectPath value", -r);
return *this;
}
Message& Message::operator<<(const Signature &item)
{
auto r = sd_bus_message_append_basic((sd_bus_message*)msg_, SD_BUS_TYPE_SIGNATURE, item.c_str());
SDBUS_THROW_ERROR_IF(r < 0, "Failed to serialize a Signature value", -r);
return *this;
}
Message& Message::operator<<(const UnixFd &item)
{
auto fd = item.get();
auto r = sd_bus_message_append_basic((sd_bus_message*)msg_, SD_BUS_TYPE_UNIX_FD, &fd);
SDBUS_THROW_ERROR_IF(r < 0, "Failed to serialize a UnixFd value", -r);
return *this;
}
Message& Message::operator>>(bool& item)
{
int intItem;
auto r = sd_bus_message_read_basic((sd_bus_message*)msg_, SD_BUS_TYPE_BOOLEAN, &intItem);
if (r == 0)
ok_ = false;
SDBUS_THROW_ERROR_IF(r < 0, "Failed to deserialize a bool value", -r);
item = static_cast<bool>(intItem);
return *this;
}
Message& Message::operator>>(int16_t& item)
{
auto r = sd_bus_message_read_basic((sd_bus_message*)msg_, SD_BUS_TYPE_INT16, &item);
if (r == 0)
ok_ = false;
SDBUS_THROW_ERROR_IF(r < 0, "Failed to deserialize a int16_t value", -r);
return *this;
}
Message& Message::operator>>(int32_t& item)
{
auto r = sd_bus_message_read_basic((sd_bus_message*)msg_, SD_BUS_TYPE_INT32, &item);
if (r == 0)
ok_ = false;
SDBUS_THROW_ERROR_IF(r < 0, "Failed to deserialize a int32_t value", -r);
return *this;
}
Message& Message::operator>>(int64_t& item)
{
auto r = sd_bus_message_read_basic((sd_bus_message*)msg_, SD_BUS_TYPE_INT64, &item);
if (r == 0)
ok_ = false;
SDBUS_THROW_ERROR_IF(r < 0, "Failed to deserialize a bool value", -r);
return *this;
}
Message& Message::operator>>(uint8_t& item)
{
auto r = sd_bus_message_read_basic((sd_bus_message*)msg_, SD_BUS_TYPE_BYTE, &item);
if (r == 0)
ok_ = false;
SDBUS_THROW_ERROR_IF(r < 0, "Failed to deserialize a byte value", -r);
return *this;
}
Message& Message::operator>>(uint16_t& item)
{
auto r = sd_bus_message_read_basic((sd_bus_message*)msg_, SD_BUS_TYPE_UINT16, &item);
if (r == 0)
ok_ = false;
SDBUS_THROW_ERROR_IF(r < 0, "Failed to deserialize a uint16_t value", -r);
return *this;
}
Message& Message::operator>>(uint32_t& item)
{
auto r = sd_bus_message_read_basic((sd_bus_message*)msg_, SD_BUS_TYPE_UINT32, &item);
if (r == 0)
ok_ = false;
SDBUS_THROW_ERROR_IF(r < 0, "Failed to deserialize a uint32_t value", -r);
return *this;
}
Message& Message::operator>>(uint64_t& item)
{
auto r = sd_bus_message_read_basic((sd_bus_message*)msg_, SD_BUS_TYPE_UINT64, &item);
if (r == 0)
ok_ = false;
SDBUS_THROW_ERROR_IF(r < 0, "Failed to deserialize a uint64_t value", -r);
return *this;
}
Message& Message::operator>>(double& item)
{
auto r = sd_bus_message_read_basic((sd_bus_message*)msg_, SD_BUS_TYPE_DOUBLE, &item);
if (r == 0)
ok_ = false;
SDBUS_THROW_ERROR_IF(r < 0, "Failed to deserialize a double value", -r);
return *this;
}
Message& Message::operator>>(char*& item)
{
auto r = sd_bus_message_read_basic((sd_bus_message*)msg_, SD_BUS_TYPE_STRING, &item);
if (r == 0)
ok_ = false;
SDBUS_THROW_ERROR_IF(r < 0, "Failed to deserialize a string value", -r);
return *this;
}
Message& Message::operator>>(std::string& item)
{
char* str{};
(*this) >> str;
if (str != nullptr)
item = str;
return *this;
}
Message& Message::operator>>(Variant &item)
{
item.deserializeFrom(*this);
// Empty variant is normally prohibited. Users cannot send empty variants.
// Therefore in this context an empty variant means that we are at the end
// of deserializing a container, and thus we shall set ok_ flag to false.
if (item.isEmpty())
ok_ = false;
return *this;
}
Message& Message::operator>>(ObjectPath &item)
{
char* str{};
auto r = sd_bus_message_read_basic((sd_bus_message*)msg_, SD_BUS_TYPE_OBJECT_PATH, &str);
if (r == 0)
ok_ = false;
SDBUS_THROW_ERROR_IF(r < 0, "Failed to deserialize an ObjectPath value", -r);
if (str != nullptr)
item = str;
return *this;
}
Message& Message::operator>>(Signature &item)
{
char* str{};
auto r = sd_bus_message_read_basic((sd_bus_message*)msg_, SD_BUS_TYPE_SIGNATURE, &str);
if (r == 0)
ok_ = false;
SDBUS_THROW_ERROR_IF(r < 0, "Failed to deserialize a Signature value", -r);
if (str != nullptr)
item = str;
return *this;
}
Message& Message::operator>>(UnixFd &item)
{
int fd = -1;
auto r = sd_bus_message_read_basic((sd_bus_message*)msg_, SD_BUS_TYPE_UNIX_FD, &fd);
if (r == 0)
ok_ = false;
SDBUS_THROW_ERROR_IF(r < 0, "Failed to deserialize a UnixFd value", -r);
item.reset(fd);
return *this;
}
Message& Message::openContainer(const std::string& signature)
{
auto r = sd_bus_message_open_container((sd_bus_message*)msg_, SD_BUS_TYPE_ARRAY, signature.c_str());
SDBUS_THROW_ERROR_IF(r < 0, "Failed to open a container", -r);
return *this;
}
Message& Message::closeContainer()
{
auto r = sd_bus_message_close_container((sd_bus_message*)msg_);
SDBUS_THROW_ERROR_IF(r < 0, "Failed to close a container", -r);
return *this;
}
Message& Message::openDictEntry(const std::string& signature)
{
auto r = sd_bus_message_open_container((sd_bus_message*)msg_, SD_BUS_TYPE_DICT_ENTRY, signature.c_str());
SDBUS_THROW_ERROR_IF(r < 0, "Failed to open a dictionary entry", -r);
return *this;
}
Message& Message::closeDictEntry()
{
auto r = sd_bus_message_close_container((sd_bus_message*)msg_);
SDBUS_THROW_ERROR_IF(r < 0, "Failed to close a dictionary entry", -r);
return *this;
}
Message& Message::openVariant(const std::string& signature)
{
auto r = sd_bus_message_open_container((sd_bus_message*)msg_, SD_BUS_TYPE_VARIANT, signature.c_str());
SDBUS_THROW_ERROR_IF(r < 0, "Failed to open a variant", -r);
return *this;
}
Message& Message::closeVariant()
{
auto r = sd_bus_message_close_container((sd_bus_message*)msg_);
SDBUS_THROW_ERROR_IF(r < 0, "Failed to close a variant", -r);
return *this;
}
Message& Message::openStruct(const std::string& signature)
{
auto r = sd_bus_message_open_container((sd_bus_message*)msg_, SD_BUS_TYPE_STRUCT, signature.c_str());
SDBUS_THROW_ERROR_IF(r < 0, "Failed to open a struct", -r);
return *this;
}
Message& Message::closeStruct()
{
auto r = sd_bus_message_close_container((sd_bus_message*)msg_);
SDBUS_THROW_ERROR_IF(r < 0, "Failed to close a struct", -r);
return *this;
}
Message& Message::enterContainer(const std::string& signature)
{
auto r = sd_bus_message_enter_container((sd_bus_message*)msg_, SD_BUS_TYPE_ARRAY, signature.c_str());
if (r == 0)
ok_ = false;
SDBUS_THROW_ERROR_IF(r < 0, "Failed to enter a container", -r);
return *this;
}
Message& Message::exitContainer()
{
auto r = sd_bus_message_exit_container((sd_bus_message*)msg_);
SDBUS_THROW_ERROR_IF(r < 0, "Failed to exit a container", -r);
return *this;
}
Message& Message::enterDictEntry(const std::string& signature)
{
auto r = sd_bus_message_enter_container((sd_bus_message*)msg_, SD_BUS_TYPE_DICT_ENTRY, signature.c_str());
if (r == 0)
ok_ = false;
SDBUS_THROW_ERROR_IF(r < 0, "Failed to enter a dictionary entry", -r);
return *this;
}
Message& Message::exitDictEntry()
{
auto r = sd_bus_message_exit_container((sd_bus_message*)msg_);
SDBUS_THROW_ERROR_IF(r < 0, "Failed to exit a dictionary entry", -r);
return *this;
}
Message& Message::enterVariant(const std::string& signature)
{
auto r = sd_bus_message_enter_container((sd_bus_message*)msg_, SD_BUS_TYPE_VARIANT, signature.c_str());
if (r == 0)
ok_ = false;
SDBUS_THROW_ERROR_IF(r < 0, "Failed to enter a variant", -r);
return *this;
}
Message& Message::exitVariant()
{
auto r = sd_bus_message_exit_container((sd_bus_message*)msg_);
SDBUS_THROW_ERROR_IF(r < 0, "Failed to exit a variant", -r);
return *this;
}
Message& Message::enterStruct(const std::string& signature)
{
auto r = sd_bus_message_enter_container((sd_bus_message*)msg_, SD_BUS_TYPE_STRUCT, signature.c_str());
if (r == 0)
ok_ = false;
SDBUS_THROW_ERROR_IF(r < 0, "Failed to enter a struct", -r);
return *this;
}
Message& Message::exitStruct()
{
auto r = sd_bus_message_exit_container((sd_bus_message*)msg_);
SDBUS_THROW_ERROR_IF(r < 0, "Failed to exit a struct", -r);
return *this;
}
Message::operator bool() const
{
return ok_;
}
void Message::clearFlags()
{
ok_ = true;
}
void Message::copyTo(Message& destination, bool complete) const
{
auto r = sd_bus_message_copy((sd_bus_message*)destination.msg_, (sd_bus_message*)msg_, complete);
SDBUS_THROW_ERROR_IF(r < 0, "Failed to copy the message", -r);
}
void Message::seal()
{
const auto messageCookie = 1;
const auto sealTimeout = 0;
auto r = sd_bus_message_seal((sd_bus_message*)msg_, messageCookie, sealTimeout);
SDBUS_THROW_ERROR_IF(r < 0, "Failed to seal the message", -r);
}
void Message::rewind(bool complete)
{
auto r = sd_bus_message_rewind((sd_bus_message*)msg_, complete);
SDBUS_THROW_ERROR_IF(r < 0, "Failed to rewind the message", -r);
}
std::string Message::getInterfaceName() const
{
return sd_bus_message_get_interface((sd_bus_message*)msg_);
}
std::string Message::getMemberName() const
{
return sd_bus_message_get_member((sd_bus_message*)msg_);
}
std::string Message::getSender() const
{
return sd_bus_message_get_sender((sd_bus_message*)msg_);
}
void Message::peekType(std::string& type, std::string& contents) const
{
char typeSig;
const char* contentsSig;
auto r = sd_bus_message_peek_type((sd_bus_message*)msg_, &typeSig, &contentsSig);
SDBUS_THROW_ERROR_IF(r < 0, "Failed to peek message type", -r);
type = typeSig;
contents = contentsSig;
}
bool Message::isValid() const
{
return msg_ != nullptr && sdbus_ != nullptr;
}
bool Message::isEmpty() const
{
return sd_bus_message_is_empty((sd_bus_message*)msg_) != 0;
}
void MethodCall::dontExpectReply()
{
auto r = sd_bus_message_set_expect_reply((sd_bus_message*)msg_, 0);
SDBUS_THROW_ERROR_IF(r < 0, "Failed to set the dont-expect-reply flag", -r);
}
bool MethodCall::doesntExpectReply() const
{
auto r = sd_bus_message_get_expect_reply((sd_bus_message*)msg_);
SDBUS_THROW_ERROR_IF(r < 0, "Failed to get the dont-expect-reply flag", -r);
return r == 0;
}
MethodReply MethodCall::send(uint64_t timeout) const
{
if (!doesntExpectReply())
return sendWithReply(timeout);
else
return sendWithNoReply();
}
MethodReply MethodCall::sendWithReply(uint64_t timeout) const
{
sd_bus_error sdbusError = SD_BUS_ERROR_NULL;
SCOPE_EXIT{ sd_bus_error_free(&sdbusError); };
sd_bus_message* sdbusReply{};
auto r = sdbus_->sd_bus_call(nullptr, (sd_bus_message*)msg_, timeout, &sdbusError, &sdbusReply);
if (sd_bus_error_is_set(&sdbusError))
throw sdbus::Error(sdbusError.name, sdbusError.message);
SDBUS_THROW_ERROR_IF(r < 0, "Failed to call method", -r);
return Factory::create<MethodReply>(sdbusReply, sdbus_, adopt_message);
}
MethodReply MethodCall::sendWithNoReply() const
{
auto r = sdbus_->sd_bus_send(nullptr, (sd_bus_message*)msg_, nullptr);
SDBUS_THROW_ERROR_IF(r < 0, "Failed to call method with no reply", -r);
return Factory::create<MethodReply>(); // No reply
}
void MethodCall::send(void* callback, void* userData, uint64_t timeout, dont_request_slot_t) const
{
auto r = sdbus_->sd_bus_call_async(nullptr, nullptr, (sd_bus_message*)msg_, (sd_bus_message_handler_t)callback, userData, timeout);
SDBUS_THROW_ERROR_IF(r < 0, "Failed to call method", -r);
}
MethodCall::Slot MethodCall::send(void* callback, void* userData, uint64_t timeout) const
{
sd_bus_slot* slot;
auto r = sdbus_->sd_bus_call_async(nullptr, &slot, (sd_bus_message*)msg_, (sd_bus_message_handler_t)callback, userData, timeout);
SDBUS_THROW_ERROR_IF(r < 0, "Failed to call method asynchronously", -r);
return Slot{slot, [sdbus_ = sdbus_](void *slot){ sdbus_->sd_bus_slot_unref((sd_bus_slot*)slot); }};
}
MethodReply MethodCall::createReply() const
{
sd_bus_message* sdbusReply{};
auto r = sdbus_->sd_bus_message_new_method_return((sd_bus_message*)msg_, &sdbusReply);
SDBUS_THROW_ERROR_IF(r < 0, "Failed to create method reply", -r);
return Factory::create<MethodReply>(sdbusReply, sdbus_, adopt_message);
}
MethodReply MethodCall::createErrorReply(const Error& error) const
{
sd_bus_error sdbusError = SD_BUS_ERROR_NULL;
SCOPE_EXIT{ sd_bus_error_free(&sdbusError); };
sd_bus_error_set(&sdbusError, error.getName().c_str(), error.getMessage().c_str());
sd_bus_message* sdbusErrorReply{};
auto r = sdbus_->sd_bus_message_new_method_error((sd_bus_message*)msg_, &sdbusErrorReply, &sdbusError);
SDBUS_THROW_ERROR_IF(r < 0, "Failed to create method error reply", -r);
return Factory::create<MethodReply>(sdbusErrorReply, sdbus_, adopt_message);
}
void MethodReply::send() const
{
auto r = sdbus_->sd_bus_send(nullptr, (sd_bus_message*)msg_, nullptr);
SDBUS_THROW_ERROR_IF(r < 0, "Failed to send reply", -r);
}
void Signal::send() const
{
auto r = sdbus_->sd_bus_send(nullptr, (sd_bus_message*)msg_, nullptr);
SDBUS_THROW_ERROR_IF(r < 0, "Failed to emit signal", -r);
}
PlainMessage createPlainMessage()
{
static auto connection = internal::createConnection();
return connection->createPlainMessage();
}
}
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