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//
// Copyright (C) 2012 The Android Open Source Project
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
#include "shill/cellular/modem.h"
#include <base/bind.h>
#include <base/strings/stringprintf.h>
#include "shill/cellular/cellular.h"
#include "shill/control_interface.h"
#include "shill/logging.h"
#include "shill/manager.h"
#include "shill/net/rtnl_handler.h"
using base::Bind;
using base::Unretained;
using std::string;
using std::vector;
namespace shill {
namespace Logging {
static auto kModuleLogScope = ScopeLogger::kModem;
static string ObjectID(Modem* m) { return m->path().c_str(); }
}
// statics
constexpr char Modem::kFakeDevNameFormat[];
const char Modem::kFakeDevAddress[] = "000000000000";
const int Modem::kFakeDevInterfaceIndex = -1;
size_t Modem::fake_dev_serial_ = 0;
Modem::Modem(const string& service,
const string& path,
ModemInfo* modem_info)
: service_(service),
path_(path),
modem_info_(modem_info),
type_(Cellular::kTypeInvalid),
pending_device_info_(false),
rtnl_handler_(RTNLHandler::GetInstance()) {
LOG(INFO) << "Modem created: at " << path;
}
Modem::~Modem() {
LOG(INFO) << "Modem destructed: " << path_;
if (device_) {
device_->DestroyService();
modem_info_->manager()->device_info()->DeregisterDevice(device_);
}
}
void Modem::Init() {
dbus_properties_proxy_ =
modem_info_->control_interface()->CreateDBusPropertiesProxy(path(),
service());
dbus_properties_proxy_->set_modem_manager_properties_changed_callback(
Bind(&Modem::OnModemManagerPropertiesChanged, Unretained(this)));
dbus_properties_proxy_->set_properties_changed_callback(
Bind(&Modem::OnPropertiesChanged, Unretained(this)));
}
void Modem::OnDeviceInfoAvailable(const string& link_name) {
SLOG(this, 2) << __func__;
if (pending_device_info_ && link_name_ == link_name) {
// pending_device_info_ is only set if we've already been through
// CreateDeviceFromModemProperties() and saved our initial
// properties already
pending_device_info_ = false;
CreateDeviceFromModemProperties(initial_properties_);
}
}
Cellular* Modem::ConstructCellular(const string& link_name,
const string& address,
int interface_index) {
LOG(INFO) << "Creating a cellular device on link " << link_name
<< " interface index " << interface_index << ".";
return new Cellular(modem_info_,
link_name,
address,
interface_index,
type_,
service_,
path_);
}
void Modem::CreateDeviceFromModemProperties(
const InterfaceToProperties& properties) {
SLOG(this, 2) << __func__;
if (device_.get()) {
return;
}
InterfaceToProperties::const_iterator properties_it =
properties.find(GetModemInterface());
if (properties_it == properties.end()) {
LOG(ERROR) << "Unable to find modem interface properties.";
return;
}
string mac_address;
int interface_index = -1;
if (GetLinkName(properties_it->second, &link_name_)) {
GetDeviceParams(&mac_address, &interface_index);
if (interface_index < 0) {
LOG(ERROR) << "Unable to create cellular device -- no interface index.";
return;
}
if (mac_address.empty()) {
// Save our properties, wait for OnDeviceInfoAvailable to be called.
LOG(WARNING)
<< "No hardware address, device creation pending device info.";
initial_properties_ = properties;
pending_device_info_ = true;
return;
}
// Got the interface index and MAC address. Fall-through to actually
// creating the Cellular object.
} else {
// Probably a PPP dongle.
LOG(INFO) << "Cellular device without link name; assuming PPP dongle.";
link_name_ = base::StringPrintf(kFakeDevNameFormat, fake_dev_serial_++);
mac_address = kFakeDevAddress;
interface_index = kFakeDevInterfaceIndex;
}
if (modem_info_->manager()->device_info()->IsDeviceBlackListed(link_name_)) {
LOG(INFO) << "Not creating cellular device for blacklisted interface "
<< link_name_ << ".";
return;
}
device_ = ConstructCellular(link_name_, mac_address, interface_index);
// Give the device a chance to extract any capability-specific properties.
for (properties_it = properties.begin(); properties_it != properties.end();
++properties_it) {
device_->OnPropertiesChanged(
properties_it->first, properties_it->second, vector<string>());
}
modem_info_->manager()->device_info()->RegisterDevice(device_);
}
bool Modem::GetDeviceParams(string* mac_address, int* interface_index) {
// TODO(petkov): Get the interface index from DeviceInfo, similar to the MAC
// address below.
*interface_index = rtnl_handler_->GetInterfaceIndex(link_name_);
if (*interface_index < 0) {
return false;
}
ByteString address_bytes;
if (!modem_info_->manager()->device_info()->GetMACAddress(*interface_index,
&address_bytes)) {
return false;
}
*mac_address = address_bytes.HexEncode();
return true;
}
void Modem::OnPropertiesChanged(
const string& interface,
const KeyValueStore& changed_properties,
const vector<string>& invalidated_properties) {
SLOG(this, 2) << __func__;
SLOG(this, 3) << "PropertiesChanged signal received.";
if (device_.get()) {
device_->OnPropertiesChanged(interface,
changed_properties,
invalidated_properties);
}
}
void Modem::OnModemManagerPropertiesChanged(
const string& interface,
const KeyValueStore& properties) {
vector<string> invalidated_properties;
OnPropertiesChanged(interface, properties, invalidated_properties);
}
} // namespace shill