mirror of
https://github.com/klzgrad/naiveproxy.git
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107 lines
3.3 KiB
C++
107 lines
3.3 KiB
C++
// Copyright 2013 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include "net/dns/mdns_client.h"
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#include "net/base/ip_address.h"
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#include "net/base/net_errors.h"
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#include "net/base/network_interfaces.h"
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#include "net/dns/dns_protocol.h"
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#include "net/dns/mdns_client_impl.h"
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#include "net/log/net_log.h"
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#include "net/log/net_log_source.h"
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namespace net {
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namespace {
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const char kMDnsMulticastGroupIPv4[] = "224.0.0.251";
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const char kMDnsMulticastGroupIPv6[] = "FF02::FB";
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IPEndPoint GetMDnsIPEndPoint(const char* address) {
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IPAddress multicast_group_number;
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bool success = multicast_group_number.AssignFromIPLiteral(address);
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DCHECK(success);
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return IPEndPoint(multicast_group_number,
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dns_protocol::kDefaultPortMulticast);
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}
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int Bind(const IPEndPoint& multicast_addr,
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uint32_t interface_index,
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DatagramServerSocket* socket) {
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IPAddress address_any(IPAddress::AllZeros(multicast_addr.address().size()));
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IPEndPoint bind_endpoint(address_any, multicast_addr.port());
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socket->AllowAddressReuse();
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socket->SetMulticastInterface(interface_index);
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int rv = socket->Listen(bind_endpoint);
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if (rv < OK)
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return rv;
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return socket->JoinGroup(multicast_addr.address());
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}
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} // namespace
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// static
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std::unique_ptr<MDnsSocketFactory> MDnsSocketFactory::CreateDefault() {
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return std::unique_ptr<MDnsSocketFactory>(new MDnsSocketFactoryImpl);
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}
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// static
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std::unique_ptr<MDnsClient> MDnsClient::CreateDefault() {
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return std::unique_ptr<MDnsClient>(new MDnsClientImpl());
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}
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IPEndPoint GetMDnsIPEndPoint(AddressFamily address_family) {
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switch (address_family) {
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case ADDRESS_FAMILY_IPV4:
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return GetMDnsIPEndPoint(kMDnsMulticastGroupIPv4);
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case ADDRESS_FAMILY_IPV6:
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return GetMDnsIPEndPoint(kMDnsMulticastGroupIPv6);
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default:
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NOTREACHED();
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return IPEndPoint();
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}
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}
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InterfaceIndexFamilyList GetMDnsInterfacesToBind() {
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NetworkInterfaceList network_list;
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InterfaceIndexFamilyList interfaces;
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if (!GetNetworkList(&network_list, INCLUDE_HOST_SCOPE_VIRTUAL_INTERFACES))
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return interfaces;
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for (size_t i = 0; i < network_list.size(); ++i) {
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AddressFamily family = GetAddressFamily(network_list[i].address);
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if (family == ADDRESS_FAMILY_IPV4 || family == ADDRESS_FAMILY_IPV6) {
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interfaces.push_back(
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std::make_pair(network_list[i].interface_index, family));
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}
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}
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std::sort(interfaces.begin(), interfaces.end());
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// Interfaces could have multiple addresses. Filter out duplicate entries.
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interfaces.erase(std::unique(interfaces.begin(), interfaces.end()),
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interfaces.end());
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return interfaces;
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}
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std::unique_ptr<DatagramServerSocket> CreateAndBindMDnsSocket(
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AddressFamily address_family,
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uint32_t interface_index,
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NetLog* net_log) {
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std::unique_ptr<DatagramServerSocket> socket(
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new UDPServerSocket(net_log, NetLogSource()));
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IPEndPoint multicast_addr = GetMDnsIPEndPoint(address_family);
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int rv = Bind(multicast_addr, interface_index, socket.get());
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if (rv != OK) {
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socket.reset();
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VLOG(1) << "Bind failed, endpoint=" << multicast_addr.ToStringWithoutPort()
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<< ", error=" << rv;
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}
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return socket;
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}
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} // namespace net
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