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- // Copyright 2013 The Chromium 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 "net/dns/mdns_client.h"
- #include "net/base/address_family.h"
- #include "net/base/net_errors.h"
- #include "net/base/network_interfaces.h"
- #include "net/dns/mdns_client_impl.h"
- #include "net/dns/public/util.h"
- #include "net/log/net_log.h"
- #include "net/log/net_log_source.h"
- namespace net {
- namespace {
- int Bind(AddressFamily address_family,
- uint32_t interface_index,
- DatagramServerSocket* socket) {
- socket->AllowAddressSharingForMulticast();
- socket->SetMulticastInterface(interface_index);
- int rv = socket->Listen(dns_util::GetMdnsReceiveEndPoint(address_family));
- if (rv < OK)
- return rv;
- return socket->JoinGroup(
- dns_util::GetMdnsGroupEndPoint(address_family).address());
- }
- } // namespace
- const base::TimeDelta MDnsTransaction::kTransactionTimeout = base::Seconds(3);
- // static
- std::unique_ptr<MDnsSocketFactory> MDnsSocketFactory::CreateDefault() {
- return std::make_unique<MDnsSocketFactoryImpl>();
- }
- // static
- std::unique_ptr<MDnsClient> MDnsClient::CreateDefault() {
- return std::make_unique<MDnsClientImpl>();
- }
- InterfaceIndexFamilyList GetMDnsInterfacesToBind() {
- NetworkInterfaceList network_list;
- InterfaceIndexFamilyList interfaces;
- if (!GetNetworkList(&network_list, INCLUDE_HOST_SCOPE_VIRTUAL_INTERFACES))
- return interfaces;
- for (const auto& network_interface : network_list) {
- AddressFamily family = GetAddressFamily(network_interface.address);
- if (family == ADDRESS_FAMILY_IPV4 || family == ADDRESS_FAMILY_IPV6) {
- interfaces.push_back(
- std::make_pair(network_interface.interface_index, family));
- }
- }
- std::sort(interfaces.begin(), interfaces.end());
- // Interfaces could have multiple addresses. Filter out duplicate entries.
- interfaces.erase(std::unique(interfaces.begin(), interfaces.end()),
- interfaces.end());
- return interfaces;
- }
- std::unique_ptr<DatagramServerSocket> CreateAndBindMDnsSocket(
- AddressFamily address_family,
- uint32_t interface_index,
- NetLog* net_log) {
- auto socket = std::make_unique<UDPServerSocket>(net_log, NetLogSource());
- int rv = Bind(address_family, interface_index, socket.get());
- if (rv != OK) {
- socket.reset();
- VLOG(1) << "MDNS bind failed, address_family=" << address_family
- << ", error=" << rv;
- }
- return socket;
- }
- } // namespace net
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