// 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/ipconfig.h"

#include <limits>
#include <string>
#include <utility>
#include <vector>

#include <chromeos/dbus/service_constants.h>

#include "shill/adaptor_interfaces.h"
#include "shill/control_interface.h"
#include "shill/error.h"
#include "shill/logging.h"
#include "shill/static_ip_parameters.h"

#include <base/logging.h>

namespace shill {

namespace Logging {
static auto kModuleLogScope = ScopeLogger::kInet;
static std::string ObjectID(const IPConfig* i) {
  return i->GetRpcIdentifier().value();
}
}  // namespace Logging

namespace {
constexpr char kTypeIP[] = "ip";
}

bool IPConfig::Properties::HasIPAddressAndDNS() const {
  return !address.empty() && !dns_servers.empty();
}

// static
uint32_t IPConfig::global_serial_ = 0;

IPConfig::IPConfig(ControlInterface* control_interface,
                   const std::string& device_name)
    : IPConfig(control_interface, device_name, kTypeIP) {}

IPConfig::IPConfig(ControlInterface* control_interface,
                   const std::string& device_name,
                   const std::string& type)
    : device_name_(device_name),
      type_(type),
      serial_(global_serial_++),
      adaptor_(control_interface->CreateIPConfigAdaptor(this)) {
  store_.RegisterConstString(kAddressProperty, &properties_.address);
  store_.RegisterConstString(kBroadcastProperty,
                             &properties_.broadcast_address);
  store_.RegisterConstString(kDomainNameProperty, &properties_.domain_name);
  store_.RegisterConstString(kGatewayProperty, &properties_.gateway);
  store_.RegisterConstString(kMethodProperty, &properties_.method);
  store_.RegisterConstInt32(kMtuProperty, &properties_.mtu);
  store_.RegisterConstStrings(kNameServersProperty, &properties_.dns_servers);
  store_.RegisterConstString(kPeerAddressProperty, &properties_.peer_address);
  store_.RegisterConstInt32(kPrefixlenProperty, &properties_.subnet_prefix);
  store_.RegisterConstStrings(kSearchDomainsProperty,
                              &properties_.domain_search);
  store_.RegisterConstByteArray(kVendorEncapsulatedOptionsProperty,
                                &properties_.vendor_encapsulated_options);
  store_.RegisterConstString(kWebProxyAutoDiscoveryUrlProperty,
                             &properties_.web_proxy_auto_discovery);
  store_.RegisterConstUint32(kLeaseDurationSecondsProperty,
                             &properties_.lease_duration_seconds);
  store_.RegisterConstByteArray(kiSNSOptionDataProperty,
                                &properties_.isns_option_data);
  SLOG(this, 2) << __func__ << " device: " << device_name_;
}

IPConfig::~IPConfig() {
  SLOG(this, 2) << __func__ << " device: " << device_name();
}

const RpcIdentifier& IPConfig::GetRpcIdentifier() const {
  return adaptor_->GetRpcIdentifier();
}

void IPConfig::ApplyStaticIPParameters(
    StaticIPParameters* static_ip_parameters) {
  static_ip_parameters->ApplyTo(&properties_);
  EmitChanges();
}

void IPConfig::RestoreSavedIPParameters(
    StaticIPParameters* static_ip_parameters) {
  static_ip_parameters->RestoreTo(&properties_);
  EmitChanges();
}

bool IPConfig::SetBlackholedUids(const std::vector<uint32_t>& uids) {
  if (properties_.blackholed_uids == uids) {
    return false;
  }
  properties_.blackholed_uids = uids;
  return true;
}

bool IPConfig::ClearBlackholedUids() {
  return SetBlackholedUids(std::vector<uint32_t>());
}

void IPConfig::UpdateProperties(const Properties& properties) {
  properties_ = properties;
  EmitChanges();
}

void IPConfig::UpdateDNSServers(std::vector<std::string> dns_servers) {
  properties_.dns_servers = std::move(dns_servers);
  EmitChanges();
}

void IPConfig::ResetProperties() {
  properties_ = Properties();
  EmitChanges();
}

void IPConfig::EmitChanges() {
  adaptor_->EmitStringChanged(kAddressProperty, properties_.address);
  adaptor_->EmitStringsChanged(kNameServersProperty, properties_.dns_servers);
}

}  // namespace shill