| // Copyright 2018 The Chromium OS Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "shill/cellular/cellular_bearer.h" |
| |
| #include <ModemManager/ModemManager.h> |
| |
| #include <base/bind.h> |
| #include <chromeos/dbus/service_constants.h> |
| |
| #include "shill/control_interface.h" |
| #include "shill/dbus_properties_proxy_interface.h" |
| #include "shill/logging.h" |
| |
| using std::string; |
| using std::vector; |
| |
| namespace shill { |
| |
| namespace Logging { |
| static auto kModuleLogScope = ScopeLogger::kCellular; |
| static string ObjectID(const CellularBearer* c) { |
| return "(cellular_bearer)"; |
| } |
| } // namespace Logging |
| |
| namespace { |
| |
| const char kPropertyAddress[] = "address"; |
| const char kPropertyDNS1[] = "dns1"; |
| const char kPropertyDNS2[] = "dns2"; |
| const char kPropertyDNS3[] = "dns3"; |
| const char kPropertyGateway[] = "gateway"; |
| const char kPropertyMethod[] = "method"; |
| const char kPropertyPrefix[] = "prefix"; |
| const char kPropertyMtu[] = "mtu"; |
| |
| IPConfig::Method ConvertMMBearerIPConfigMethod(uint32_t method) { |
| switch (method) { |
| case MM_BEARER_IP_METHOD_PPP: |
| return IPConfig::kMethodPPP; |
| case MM_BEARER_IP_METHOD_STATIC: |
| return IPConfig::kMethodStatic; |
| case MM_BEARER_IP_METHOD_DHCP: |
| return IPConfig::kMethodDHCP; |
| default: |
| return IPConfig::kMethodUnknown; |
| } |
| } |
| |
| } // namespace |
| |
| CellularBearer::CellularBearer(ControlInterface* control_interface, |
| const RpcIdentifier& dbus_path, |
| const string& dbus_service) |
| : control_interface_(control_interface), |
| dbus_path_(dbus_path), |
| dbus_service_(dbus_service), |
| connected_(false), |
| ipv4_config_method_(IPConfig::kMethodUnknown), |
| ipv6_config_method_(IPConfig::kMethodUnknown) { |
| CHECK(control_interface_); |
| } |
| |
| CellularBearer::~CellularBearer() = default; |
| |
| bool CellularBearer::Init() { |
| SLOG(this, 3) << __func__ << ": path='" << dbus_path_.value() |
| << "', service='" << dbus_service_ << "'"; |
| |
| dbus_properties_proxy_ = |
| control_interface_->CreateDBusPropertiesProxy(dbus_path_, dbus_service_); |
| // It is possible that ProxyFactory::CreateDBusPropertiesProxy() returns |
| // nullptr as the bearer DBus object may no longer exist. |
| if (!dbus_properties_proxy_) { |
| LOG(WARNING) << "Failed to create DBus properties proxy for bearer '" |
| << dbus_path_.value() << "'. Bearer is likely gone."; |
| return false; |
| } |
| |
| dbus_properties_proxy_->set_properties_changed_callback( |
| base::Bind(&CellularBearer::OnPropertiesChanged, base::Unretained(this))); |
| UpdateProperties(); |
| return true; |
| } |
| |
| void CellularBearer::GetIPConfigMethodAndProperties( |
| const KeyValueStore& properties, |
| IPAddress::Family address_family, |
| IPConfig::Method* ipconfig_method, |
| std::unique_ptr<IPConfig::Properties>* ipconfig_properties) const { |
| DCHECK(ipconfig_method); |
| DCHECK(ipconfig_properties); |
| |
| uint32_t method = MM_BEARER_IP_METHOD_UNKNOWN; |
| if (properties.Contains<uint32_t>(kPropertyMethod)) { |
| method = properties.Get<uint32_t>(kPropertyMethod); |
| } else { |
| SLOG(this, 2) << "Bearer '" << dbus_path_.value() |
| << "' does not specify an IP configuration method."; |
| } |
| |
| *ipconfig_method = ConvertMMBearerIPConfigMethod(method); |
| ipconfig_properties->reset(); |
| |
| if (*ipconfig_method != IPConfig::kMethodStatic) |
| return; |
| |
| if (!properties.Contains<string>(kPropertyAddress) || |
| !properties.Contains<string>(kPropertyGateway)) { |
| SLOG(this, 2) << "Bearer '" << dbus_path_.value() |
| << "' static IP configuration does not specify valid " |
| "address/gateway information."; |
| *ipconfig_method = IPConfig::kMethodUnknown; |
| return; |
| } |
| |
| ipconfig_properties->reset(new IPConfig::Properties); |
| (*ipconfig_properties)->address_family = address_family; |
| (*ipconfig_properties)->address = properties.Get<string>(kPropertyAddress); |
| (*ipconfig_properties)->gateway = properties.Get<string>(kPropertyGateway); |
| |
| // Set method string for kMethodStatic |
| if ((*ipconfig_properties)->address_family == IPAddress::kFamilyIPv4) { |
| (*ipconfig_properties)->method = kTypeIPv4; |
| } else if ((*ipconfig_properties)->address_family == IPAddress::kFamilyIPv6) { |
| (*ipconfig_properties)->method = kTypeIPv6; |
| } |
| |
| uint32_t prefix; |
| if (!properties.Contains<uint32_t>(kPropertyPrefix)) { |
| prefix = IPAddress::GetMaxPrefixLength(address_family); |
| } else { |
| prefix = properties.Get<uint32_t>(kPropertyPrefix); |
| } |
| (*ipconfig_properties)->subnet_prefix = prefix; |
| |
| if (properties.Contains<string>(kPropertyDNS1)) { |
| (*ipconfig_properties) |
| ->dns_servers.push_back(properties.Get<string>(kPropertyDNS1)); |
| } |
| if (properties.Contains<string>(kPropertyDNS2)) { |
| (*ipconfig_properties) |
| ->dns_servers.push_back(properties.Get<string>(kPropertyDNS2)); |
| } |
| if (properties.Contains<string>(kPropertyDNS3)) { |
| (*ipconfig_properties) |
| ->dns_servers.push_back(properties.Get<string>(kPropertyDNS3)); |
| } |
| if (properties.Contains<uint32_t>(kPropertyMtu)) { |
| uint32_t mtu = properties.Get<uint32_t>(kPropertyMtu); |
| // TODO(b/139816862): A larger-than-expected MTU value has been observed |
| // on some modem. Here we temporarily ignore any MTU value larger than |
| // |IPConfig::kDefaultMTU| until the issue has been addressed on the modem |
| // side. Remove this workaround later. |
| if (mtu <= static_cast<uint32_t>(IPConfig::kDefaultMTU)) { |
| (*ipconfig_properties)->mtu = mtu; |
| } |
| } |
| } |
| |
| void CellularBearer::ResetProperties() { |
| connected_ = false; |
| data_interface_.clear(); |
| ipv4_config_method_ = IPConfig::kMethodUnknown; |
| ipv4_config_properties_.reset(); |
| ipv6_config_method_ = IPConfig::kMethodUnknown; |
| ipv6_config_properties_.reset(); |
| } |
| |
| void CellularBearer::UpdateProperties() { |
| ResetProperties(); |
| |
| if (!dbus_properties_proxy_) |
| return; |
| |
| KeyValueStore properties = |
| dbus_properties_proxy_->GetAll(MM_DBUS_INTERFACE_BEARER); |
| if (properties.IsEmpty()) { |
| LOG(WARNING) << "Could not get properties of bearer '" << dbus_path_.value() |
| << "'. Bearer is likely gone and thus ignored."; |
| return; |
| } |
| |
| OnPropertiesChanged(MM_DBUS_INTERFACE_BEARER, properties, vector<string>()); |
| } |
| |
| void CellularBearer::OnPropertiesChanged( |
| const string& interface, |
| const KeyValueStore& changed_properties, |
| const vector<string>& /*invalidated_properties*/) { |
| SLOG(this, 3) << __func__ << ": path=" << dbus_path_.value() |
| << ", interface=" << interface; |
| |
| if (interface != MM_DBUS_INTERFACE_BEARER) |
| return; |
| |
| if (changed_properties.Contains<bool>(MM_BEARER_PROPERTY_CONNECTED)) { |
| connected_ = changed_properties.Get<bool>(MM_BEARER_PROPERTY_CONNECTED); |
| } |
| |
| string data_interface; |
| if (changed_properties.Contains<string>(MM_BEARER_PROPERTY_INTERFACE)) { |
| data_interface_ = |
| changed_properties.Get<string>(MM_BEARER_PROPERTY_INTERFACE); |
| } |
| |
| if (changed_properties.Contains<KeyValueStore>( |
| MM_BEARER_PROPERTY_IP4CONFIG)) { |
| KeyValueStore ipconfig = |
| changed_properties.Get<KeyValueStore>(MM_BEARER_PROPERTY_IP4CONFIG); |
| GetIPConfigMethodAndProperties(ipconfig, IPAddress::kFamilyIPv4, |
| &ipv4_config_method_, |
| &ipv4_config_properties_); |
| } |
| if (changed_properties.Contains<KeyValueStore>( |
| MM_BEARER_PROPERTY_IP6CONFIG)) { |
| KeyValueStore ipconfig = |
| changed_properties.Get<KeyValueStore>(MM_BEARER_PROPERTY_IP6CONFIG); |
| GetIPConfigMethodAndProperties(ipconfig, IPAddress::kFamilyIPv6, |
| &ipv6_config_method_, |
| &ipv6_config_properties_); |
| } |
| } |
| |
| } // namespace shill |