From 369a637ac8032b3e41fd2b4f2f6b2ef49a447f02 Mon Sep 17 00:00:00 2001 From: "guoweis@webrtc.org" Date: Wed, 17 Sep 2014 22:37:29 +0000 Subject: [PATCH] Implemented Network::GetBestIP() selection logic as following. 1) return the first global temporary and non-deprecrated ones. 2) if #1 not available, return global one. 3) if #2 not available, use ULA ipv6 as last resort. ULA stands for unique local address. They are only useful in a private WebRTC deployment. More detail: http://en.wikipedia.org/wiki/Unique_local_address BUG=3808 At this point, rule #3 actually won't happen at current implementation. The reason being that ULA address starting with 0xfc 0r 0xfd will be grouped into its own Network. The result of that is WebRTC will have one extra Network to generate candidates but the lack of rule #3 shouldn't prevent turning on IPv6 since ULA should only be tried in a close deployment anyway. R=jiayl@webrtc.org Committed: https://code.google.com/p/webrtc/source/detail?r=7200 Committed: https://code.google.com/p/webrtc/source/detail?r=7201 Review URL: https://webrtc-codereview.appspot.com/31369004 git-svn-id: http://webrtc.googlecode.com/svn/trunk@7216 4adac7df-926f-26a2-2b94-8c16560cd09d --- talk/p2p/client/basicportallocator.cc | 6 +- talk/p2p/client/connectivitychecker.cc | 67 ++++++++++++++----- .../client/connectivitychecker_unittest.cc | 52 +++++++++++--- talk/p2p/client/fakeportallocator.h | 41 ++++++++++-- webrtc/base/nat_unittest.cc | 2 +- webrtc/base/network.cc | 67 ++++++++++++++----- webrtc/base/network.h | 31 ++++++--- webrtc/base/network_unittest.cc | 43 +++++++++++- 8 files changed, 242 insertions(+), 67 deletions(-) diff --git a/talk/p2p/client/basicportallocator.cc b/talk/p2p/client/basicportallocator.cc index eda0b4b49..9ca873b99 100644 --- a/talk/p2p/client/basicportallocator.cc +++ b/talk/p2p/client/basicportallocator.cc @@ -431,7 +431,7 @@ void BasicPortAllocatorSession::DoAllocate() { } if (!(sequence_flags & PORTALLOCATOR_ENABLE_IPV6) && - networks[i]->ip().family() == AF_INET6) { + networks[i]->GetBestIP().family() == AF_INET6) { // Skip IPv6 networks unless the flag's been set. continue; } @@ -728,7 +728,7 @@ AllocationSequence::AllocationSequence(BasicPortAllocatorSession* session, uint32 flags) : session_(session), network_(network), - ip_(network->ip()), + ip_(network->GetBestIP()), config_(config), state_(kInit), flags_(flags), @@ -771,7 +771,7 @@ AllocationSequence::~AllocationSequence() { void AllocationSequence::DisableEquivalentPhases(rtc::Network* network, PortConfiguration* config, uint32* flags) { - if (!((network == network_) && (ip_ == network->ip()))) { + if (!((network == network_) && (ip_ == network->GetBestIP()))) { // Different network setup; nothing is equivalent. return; } diff --git a/talk/p2p/client/connectivitychecker.cc b/talk/p2p/client/connectivitychecker.cc index 06de5e48a..935c4b39d 100644 --- a/talk/p2p/client/connectivitychecker.cc +++ b/talk/p2p/client/connectivitychecker.cc @@ -1,5 +1,29 @@ -// Copyright 2011 Google Inc. All Rights Reserved. - +/* + * libjingle + * Copyright 2011, Google Inc. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO + * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; + * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, + * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR + * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF + * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ #include @@ -214,7 +238,8 @@ void ConnectivityChecker::OnRequestDone(rtc::AsyncHttpRequest* request) { return; } rtc::ProxyInfo proxy_info = request->proxy(); - NicMap::iterator i = nics_.find(NicId(networks[0]->ip(), proxy_info.address)); + NicMap::iterator i = + nics_.find(NicId(networks[0]->GetBestIP(), proxy_info.address)); if (i != nics_.end()) { int port = request->port(); uint32 now = rtc::Time(); @@ -247,7 +272,7 @@ void ConnectivityChecker::OnRelayPortComplete(Port* port) { ASSERT(worker_ == rtc::Thread::Current()); RelayPort* relay_port = reinterpret_cast(port); const ProtocolAddress* address = relay_port->ServerAddress(0); - rtc::IPAddress ip = port->Network()->ip(); + rtc::IPAddress ip = port->Network()->GetBestIP(); NicMap::iterator i = nics_.find(NicId(ip, port->proxy().address)); if (i != nics_.end()) { // We have it already, add the new information. @@ -281,7 +306,7 @@ void ConnectivityChecker::OnStunPortComplete(Port* port) { ASSERT(worker_ == rtc::Thread::Current()); const std::vector candidates = port->Candidates(); Candidate c = candidates[0]; - rtc::IPAddress ip = port->Network()->ip(); + rtc::IPAddress ip = port->Network()->GetBestIP(); NicMap::iterator i = nics_.find(NicId(ip, port->proxy().address)); if (i != nics_.end()) { // We have it already, add the new information. @@ -300,7 +325,7 @@ void ConnectivityChecker::OnStunPortComplete(Port* port) { void ConnectivityChecker::OnStunPortError(Port* port) { ASSERT(worker_ == rtc::Thread::Current()); LOG(LS_ERROR) << "Stun address error."; - rtc::IPAddress ip = port->Network()->ip(); + rtc::IPAddress ip = port->Network()->GetBestIP(); NicMap::iterator i = nics_.find(NicId(ip, port->proxy().address)); if (i != nics_.end()) { // We have it already, add the new information. @@ -337,19 +362,28 @@ HttpPortAllocator* ConnectivityChecker::CreatePortAllocator( StunPort* ConnectivityChecker::CreateStunPort( const std::string& username, const std::string& password, const PortConfiguration* config, rtc::Network* network) { - return StunPort::Create(worker_, socket_factory_.get(), - network, network->ip(), 0, 0, - username, password, config->stun_servers); + return StunPort::Create(worker_, + socket_factory_.get(), + network, + network->GetBestIP(), + 0, + 0, + username, + password, + config->stun_servers); } RelayPort* ConnectivityChecker::CreateRelayPort( const std::string& username, const std::string& password, const PortConfiguration* config, rtc::Network* network) { - return RelayPort::Create(worker_, socket_factory_.get(), - network, network->ip(), + return RelayPort::Create(worker_, + socket_factory_.get(), + network, + network->GetBestIP(), port_allocator_->min_port(), port_allocator_->max_port(), - username, password); + username, + password); } void ConnectivityChecker::CreateRelayPorts( @@ -365,8 +399,8 @@ void ConnectivityChecker::CreateRelayPorts( for (relay = config->relays.begin(); relay != config->relays.end(); ++relay) { for (uint32 i = 0; i < networks.size(); ++i) { - NicMap::iterator iter = nics_.find(NicId(networks[i]->ip(), - proxy_info.address)); + NicMap::iterator iter = + nics_.find(NicId(networks[i]->GetBestIP(), proxy_info.address)); if (iter != nics_.end()) { // TODO: Now setting the same start time for all protocols. // This might affect accuracy, but since we are mainly looking for @@ -423,7 +457,7 @@ void ConnectivityChecker::AllocatePorts() { rtc::ProxyInfo proxy_info = GetProxyInfo(); bool allocate_relay_ports = false; for (uint32 i = 0; i < networks.size(); ++i) { - if (AddNic(networks[i]->ip(), proxy_info.address)) { + if (AddNic(networks[i]->GetBestIP(), proxy_info.address)) { Port* port = CreateStunPort(username, password, &config, networks[i]); if (port) { @@ -500,7 +534,8 @@ void ConnectivityChecker::RegisterHttpStart(int port) { return; } rtc::ProxyInfo proxy_info = GetProxyInfo(); - NicMap::iterator i = nics_.find(NicId(networks[0]->ip(), proxy_info.address)); + NicMap::iterator i = + nics_.find(NicId(networks[0]->GetBestIP(), proxy_info.address)); if (i != nics_.end()) { uint32 now = rtc::Time(); NicInfo* nic_info = &i->second; diff --git a/talk/p2p/client/connectivitychecker_unittest.cc b/talk/p2p/client/connectivitychecker_unittest.cc index b96cf1769..54369c564 100644 --- a/talk/p2p/client/connectivitychecker_unittest.cc +++ b/talk/p2p/client/connectivitychecker_unittest.cc @@ -1,5 +1,29 @@ -// Copyright 2011 Google Inc. All Rights Reserved. - +/* + * libjingle + * Copyright 2011, Google Inc. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO + * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; + * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, + * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR + * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF + * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ #include @@ -211,19 +235,27 @@ class ConnectivityCheckerForTest : public ConnectivityChecker { virtual StunPort* CreateStunPort( const std::string& username, const std::string& password, const PortConfiguration* config, rtc::Network* network) { - return new FakeStunPort(worker(), socket_factory_, - network, network->ip(), - kMinPort, kMaxPort, - username, password, + return new FakeStunPort(worker(), + socket_factory_, + network, + network->GetBestIP(), + kMinPort, + kMaxPort, + username, + password, config->stun_servers); } virtual RelayPort* CreateRelayPort( const std::string& username, const std::string& password, const PortConfiguration* config, rtc::Network* network) { - return new FakeRelayPort(worker(), socket_factory_, - network, network->ip(), - kMinPort, kMaxPort, - username, password); + return new FakeRelayPort(worker(), + socket_factory_, + network, + network->GetBestIP(), + kMinPort, + kMaxPort, + username, + password); } virtual void InitiateProxyDetection() { if (!proxy_initiated_) { diff --git a/talk/p2p/client/fakeportallocator.h b/talk/p2p/client/fakeportallocator.h index 6c36c4e38..4441a2fb0 100644 --- a/talk/p2p/client/fakeportallocator.h +++ b/talk/p2p/client/fakeportallocator.h @@ -1,6 +1,29 @@ -// Copyright 2010 Google Inc. All Rights Reserved, -// -// Author: Justin Uberti (juberti@google.com) +/* + * libjingle + * Copyright 2010, Google Inc. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO + * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; + * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, + * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR + * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF + * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ #ifndef TALK_P2P_CLIENT_FAKEPORTALLOCATOR_H_ #define TALK_P2P_CLIENT_FAKEPORTALLOCATOR_H_ @@ -39,10 +62,14 @@ class FakePortAllocatorSession : public PortAllocatorSession { virtual void StartGettingPorts() { if (!port_) { - port_.reset(cricket::UDPPort::Create(worker_thread_, factory_, - &network_, network_.ip(), 0, 0, - username(), - password())); + port_.reset(cricket::UDPPort::Create(worker_thread_, + factory_, + &network_, + network_.GetBestIP(), + 0, + 0, + username(), + password())); AddPort(port_.get()); } ++port_config_count_; diff --git a/webrtc/base/nat_unittest.cc b/webrtc/base/nat_unittest.cc index 8b9d8a150..0e16259a0 100644 --- a/webrtc/base/nat_unittest.cc +++ b/webrtc/base/nat_unittest.cc @@ -209,7 +209,7 @@ void TestPhysicalInternal(const SocketAddress& int_addr) { // can't talk to ip, so check for connectivity as well. for (std::vector::iterator it = networks.begin(); it != networks.end(); ++it) { - const IPAddress& ip = (*it)->ip(); + const IPAddress& ip = (*it)->GetBestIP(); if (ip.family() == int_addr.family() && TestConnectivity(int_addr, ip)) { ext_addr2.SetIP(ip); break; diff --git a/webrtc/base/network.cc b/webrtc/base/network.cc index 8c84c2e37..c1f978b92 100644 --- a/webrtc/base/network.cc +++ b/webrtc/base/network.cc @@ -88,10 +88,13 @@ bool SortNetworks(const Network* a, const Network* b) { return a->type() < b->type(); } + IPAddress ip_a = a->GetBestIP(); + IPAddress ip_b = b->GetBestIP(); + // After type, networks are sorted by IP address precedence values // from RFC 3484-bis - if (IPAddressPrecedence(a->ip()) != IPAddressPrecedence(b->ip())) { - return IPAddressPrecedence(a->ip()) > IPAddressPrecedence(b->ip()); + if (IPAddressPrecedence(ip_a) != IPAddressPrecedence(ip_b)) { + return IPAddressPrecedence(ip_a) > IPAddressPrecedence(ip_b); } // TODO(mallinath) - Add VPN and Link speed conditions while sorting. @@ -474,7 +477,7 @@ bool BasicNetworkManager::CreateNetworks(bool include_ignored, } return true; } -#endif // WEBRTC_WIN +#endif // WEBRTC_WIN #if defined(WEBRTC_LINUX) bool IsDefaultRoute(const std::string& network_name) { @@ -636,16 +639,6 @@ Network::Network(const std::string& name, const std::string& desc, ignored_(false), type_(type), preference_(0) { } -std::string Network::ToString() const { - std::stringstream ss; - // Print out the first space-terminated token of the network desc, plus - // the IP address. - ss << "Net[" << description_.substr(0, description_.find(' ')) - << ":" << prefix_.ToSensitiveString() << "/" << prefix_length_ - << ":" << AdapterTypeToString(type_) << "]"; - return ss.str(); -} - // Sets the addresses of this network. Returns true if the address set changed. // Change detection is short circuited if the changed argument is true. bool Network::SetIPs(const std::vector& ips, bool changed) { @@ -669,14 +662,52 @@ bool Network::SetIPs(const std::vector& ips, bool changed) { return changed; } -// TODO(guoweis): will change the name to a more meaningful name as -// this is not simply return the first address once the logic of ipv6 -// address selection is complete. -IPAddress Network::ip() const { +// Select the best IP address to use from this Network. +IPAddress Network::GetBestIP() const { if (ips_.size() == 0) { return IPAddress(); } - return static_cast(ips_.at(0)); + + if (prefix_.family() == AF_INET) { + return static_cast(ips_.at(0)); + } + + InterfaceAddress selected_ip, ula_ip; + + for (size_t i = 0; i < ips_.size(); i++) { + // Ignore any address which has been deprecated already. + if (ips_[i].ipv6_flags() & IPV6_ADDRESS_FLAG_DEPRECATED) + continue; + + // ULA address should only be returned when we have no other + // global IP. + if (IPIsULA(static_cast(ips_[i]))) { + ula_ip = ips_[i]; + continue; + } + selected_ip = ips_[i]; + + // Search could stop once a temporary non-deprecated one is found. + if (ips_[i].ipv6_flags() & IPV6_ADDRESS_FLAG_TEMPORARY) + break; + } + + // No proper global IPv6 address found, use ULA instead. + if (IPIsUnspec(selected_ip) && !IPIsUnspec(ula_ip)) { + selected_ip = ula_ip; + } + + return static_cast(selected_ip); +} + +std::string Network::ToString() const { + std::stringstream ss; + // Print out the first space-terminated token of the network desc, plus + // the IP address. + ss << "Net[" << description_.substr(0, description_.find(' ')) + << ":" << prefix_.ToSensitiveString() << "/" << prefix_length_ + << ":" << AdapterTypeToString(type_) << "]"; + return ss.str(); } } // namespace rtc diff --git a/webrtc/base/network.h b/webrtc/base/network.h index 4cdd4d8eb..6f9d08e70 100644 --- a/webrtc/base/network.h +++ b/webrtc/base/network.h @@ -188,19 +188,28 @@ class Network { std::string key() const { return key_; } // Returns the Network's current idea of the 'best' IP it has. - // 'Best' currently means the first one added. - // Returns an unset IP if this network has no active addresses. - // Here is the rule on how we mark the IPv6 address as ignorable for webrtc. + // Or return an unset IP if this network has no active addresses. + // Here is the rule on how we mark the IPv6 address as ignorable for WebRTC. // 1) return all global temporary dynamic and non-deprecrated ones. - // 2) if #1 not available, return global dynamic ones. - // 3) if #2 not available, return global ones. - // 4) if #3 not available, use ULA ipv6 as last resort. + // 2) if #1 not available, return global ones. + // 3) if #2 not available, use ULA ipv6 as last resort. (ULA stands + // for unique local address, which is not route-able in open + // internet but might be useful for a close WebRTC deployment. + + // TODO(guoweis): rule #3 actually won't happen at current + // implementation. The reason being that ULA address starting with + // 0xfc 0r 0xfd will be grouped into its own Network. The result of + // that is WebRTC will have one extra Network to generate candidates + // but the lack of rule #3 shouldn't prevent turning on IPv6 since + // ULA should only be tried in a close deployment anyway. + // Note that when not specifying any flag, it's treated as case global - // dynamic IPv6 address - // TODO(guoweis): will change the name to a more meaningful name as - // this is not simply return the first address once the logic of ipv6 - // address selection is complete. - IPAddress ip() const; + // IPv6 address + IPAddress GetBestIP() const; + + // Keep the original function here for now. + // TODO(guoweis): Remove this when all callers are migrated to GetBestIP(). + IPAddress ip() const { return GetBestIP(); } // Adds an active IP address to this network. Does not check for duplicates. void AddIP(const InterfaceAddress& ip) { ips_.push_back(ip); } diff --git a/webrtc/base/network_unittest.cc b/webrtc/base/network_unittest.cc index 8123f8bb6..acb118d4b 100644 --- a/webrtc/base/network_unittest.cc +++ b/webrtc/base/network_unittest.cc @@ -114,7 +114,7 @@ TEST_F(NetworkTest, DISABLED_TestCreateNetworks) { ++it) { sockaddr_storage storage; memset(&storage, 0, sizeof(storage)); - IPAddress ip = (*it)->ip(); + IPAddress ip = (*it)->GetBestIP(); SocketAddress bindaddress(ip, 0); bindaddress.SetScopeID((*it)->scope_id()); // TODO(thaloun): Use rtc::AsyncSocket once it supports IPv6. @@ -650,4 +650,45 @@ TEST_F(NetworkTest, TestMergeNetworkList) { EXPECT_EQ(list2[0]->GetIPs()[1], ip2); } +// Test that the filtering logic follows the defined ruleset in network.h. +TEST_F(NetworkTest, TestIPv6Selection) { + InterfaceAddress ip; + std::string ipstr; + + ipstr = "2401:fa00:4:1000:be30:5bff:fee5:c3"; + ASSERT_TRUE(IPFromString(ipstr, IPV6_ADDRESS_FLAG_DEPRECATED, &ip)); + + // Create a network with this prefix. + Network ipv6_network( + "test_eth0", "Test NetworkAdapter", TruncateIP(ip, 64), 64); + + // When there is no address added, it should return an unspecified + // address. + EXPECT_EQ(ipv6_network.GetBestIP(), IPAddress()); + EXPECT_TRUE(IPIsUnspec(ipv6_network.GetBestIP())); + + // Deprecated one should not be returned. + ipv6_network.AddIP(ip); + EXPECT_EQ(ipv6_network.GetBestIP(), IPAddress()); + + // Add ULA one. ULA is unique local address which is starting either + // with 0xfc or 0xfd. + ipstr = "fd00:fa00:4:1000:be30:5bff:fee5:c4"; + ASSERT_TRUE(IPFromString(ipstr, IPV6_ADDRESS_FLAG_NONE, &ip)); + ipv6_network.AddIP(ip); + EXPECT_EQ(ipv6_network.GetBestIP(), static_cast(ip)); + + // Add global one. + ipstr = "2401:fa00:4:1000:be30:5bff:fee5:c5"; + ASSERT_TRUE(IPFromString(ipstr, IPV6_ADDRESS_FLAG_NONE, &ip)); + ipv6_network.AddIP(ip); + EXPECT_EQ(ipv6_network.GetBestIP(), static_cast(ip)); + + // Add global dynamic temporary one. + ipstr = "2401:fa00:4:1000:be30:5bff:fee5:c6"; + ASSERT_TRUE(IPFromString(ipstr, IPV6_ADDRESS_FLAG_TEMPORARY, &ip)); + ipv6_network.AddIP(ip); + EXPECT_EQ(ipv6_network.GetBestIP(), static_cast(ip)); +} + } // namespace rtc