Add flag in ios to support disabling high-cost networks.

webrtc/sdk/objc/Framework/Classes/RTCConfiguration.mm

 /*
  *  Copyright 2015 The WebRTC project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
 #import "RTCConfiguration+Private.h"
 
 #include <memory>
 
 #import "RTCIceServer+Private.h"
 #import "WebRTC/RTCLogging.h"
 
 #include "webrtc/base/rtccertificategenerator.h"
 #include "webrtc/base/sslidentity.h"
 
 @implementation RTCConfiguration
 
 @synthesize iceServers = _iceServers;
 @synthesize iceTransportPolicy = _iceTransportPolicy;
 @synthesize bundlePolicy = _bundlePolicy;
 @synthesize rtcpMuxPolicy = _rtcpMuxPolicy;
 @synthesize tcpCandidatePolicy = _tcpCandidatePolicy;
+@synthesize candidateNetworkPolicy = _candidateNetworkPolicy;
 @synthesize continualGatheringPolicy = _continualGatheringPolicy;
 @synthesize audioJitterBufferMaxPackets = _audioJitterBufferMaxPackets;
 @synthesize iceConnectionReceivingTimeout = _iceConnectionReceivingTimeout;
 @synthesize iceBackupCandidatePairPingInterval =
     _iceBackupCandidatePairPingInterval;
 @synthesize keyType = _keyType;
 @synthesize iceCandidatePoolSize = _iceCandidatePoolSize;
 
 - (instancetype)init {
   if (self = [super init]) {
     _iceServers = [NSMutableArray array];
     // Copy defaults.
     webrtc::PeerConnectionInterface::RTCConfiguration config;
     _iceTransportPolicy =
         [[self class] transportPolicyForTransportsType:config.type];
     _bundlePolicy =
         [[self class] bundlePolicyForNativePolicy:config.bundle_policy];
     _rtcpMuxPolicy =
         [[self class] rtcpMuxPolicyForNativePolicy:config.rtcp_mux_policy];
     _tcpCandidatePolicy = [[self class] tcpCandidatePolicyForNativePolicy:
         config.tcp_candidate_policy];
+    _candidateNetworkPolicy = [[self class]
+        candidateNetworkPolicyForNativePolicy:config.candidate_network_policy];
     webrtc::PeerConnectionInterface::ContinualGatheringPolicy nativePolicy =
         config.continual_gathering_policy;
     _continualGatheringPolicy =
         [[self class] continualGatheringPolicyForNativePolicy:nativePolicy];
     _audioJitterBufferMaxPackets = config.audio_jitter_buffer_max_packets;
     _iceConnectionReceivingTimeout = config.ice_connection_receiving_timeout;
     _iceBackupCandidatePairPingInterval =
         config.ice_backup_candidate_pair_ping_interval;
     _keyType = RTCEncryptionKeyTypeECDSA;
     _iceCandidatePoolSize = config.ice_candidate_pool_size;
   }
   return self;
 }
 
 - (NSString *)description {
   return [NSString stringWithFormat:
-      @"RTCConfiguration: {\n%@\n%@\n%@\n%@\n%@\n%@\n%d\n%d\n%d\n%d\n}\n",
+      @"RTCConfiguration: {\n%@\n%@\n%@\n%@\n%@\n%@\n%@\n%d\n%d\n%d\n%d\n}\n",
       _iceServers,
       [[self class] stringForTransportPolicy:_iceTransportPolicy],
       [[self class] stringForBundlePolicy:_bundlePolicy],
       [[self class] stringForRtcpMuxPolicy:_rtcpMuxPolicy],
       [[self class] stringForTcpCandidatePolicy:_tcpCandidatePolicy],
+      [[self class] stringForCandidateNetworkPolicy:_candidateNetworkPolicy],
       [[self class]
           stringForContinualGatheringPolicy:_continualGatheringPolicy],
       _audioJitterBufferMaxPackets,
       _iceConnectionReceivingTimeout,
       _iceBackupCandidatePairPingInterval,
       _iceCandidatePoolSize];
 }
 
 #pragma mark - Private
 
 - (webrtc::PeerConnectionInterface::RTCConfiguration *)
     createNativeConfiguration {
   std::unique_ptr<webrtc::PeerConnectionInterface::RTCConfiguration>
       nativeConfig(new webrtc::PeerConnectionInterface::RTCConfiguration());
 
   for (RTCIceServer *iceServer in _iceServers) {
     nativeConfig->servers.push_back(iceServer.nativeServer);
   }
   nativeConfig->type =
       [[self class] nativeTransportsTypeForTransportPolicy:_iceTransportPolicy];
   nativeConfig->bundle_policy =
       [[self class] nativeBundlePolicyForPolicy:_bundlePolicy];
   nativeConfig->rtcp_mux_policy =
       [[self class] nativeRtcpMuxPolicyForPolicy:_rtcpMuxPolicy];
   nativeConfig->tcp_candidate_policy =
       [[self class] nativeTcpCandidatePolicyForPolicy:_tcpCandidatePolicy];
+  nativeConfig->candidate_network_policy = [[self class]
+      nativeCandidateNetworkPolicyForPolicy:_candidateNetworkPolicy];
   nativeConfig->continual_gathering_policy = [[self class]
       nativeContinualGatheringPolicyForPolicy:_continualGatheringPolicy];
   nativeConfig->audio_jitter_buffer_max_packets = _audioJitterBufferMaxPackets;
   nativeConfig->ice_connection_receiving_timeout =
       _iceConnectionReceivingTimeout;
   nativeConfig->ice_backup_candidate_pair_ping_interval =
       _iceBackupCandidatePairPingInterval;
   rtc::KeyType keyType =
       [[self class] nativeEncryptionKeyTypeForKeyType:_keyType];
   // Generate non-default certificate.
@@ skipping 120 matching lines @@
 + (webrtc::PeerConnectionInterface::TcpCandidatePolicy)
     nativeTcpCandidatePolicyForPolicy:(RTCTcpCandidatePolicy)policy {
   switch (policy) {
     case RTCTcpCandidatePolicyEnabled:
       return webrtc::PeerConnectionInterface::kTcpCandidatePolicyEnabled;
     case RTCTcpCandidatePolicyDisabled:
       return webrtc::PeerConnectionInterface::kTcpCandidatePolicyDisabled;
   }
 }
 
++ (webrtc::PeerConnectionInterface::CandidateNetworkPolicy)
+    nativeCandidateNetworkPolicyForPolicy:(RTCCandidateNetworkPolicy)policy {
+  switch (policy) {
+    case RTCCandidateNetworkPolicyAll:
+      return webrtc::PeerConnectionInterface::kCandidateNetworkPolicyAll;
+    case RTCCandidateNetworkPolicyLowCost:
+      return webrtc::PeerConnectionInterface::kCandidateNetworkPolicyLowCost;
+  }
+}
+
 + (rtc::KeyType)nativeEncryptionKeyTypeForKeyType:
     (RTCEncryptionKeyType)keyType {
   switch (keyType) {
     case RTCEncryptionKeyTypeRSA:
       return rtc::KT_RSA;
     case RTCEncryptionKeyTypeECDSA:
       return rtc::KT_ECDSA;
   }
 }
 
 + (RTCTcpCandidatePolicy)tcpCandidatePolicyForNativePolicy:
     (webrtc::PeerConnectionInterface::TcpCandidatePolicy)nativePolicy {
   switch (nativePolicy) {
     case webrtc::PeerConnectionInterface::kTcpCandidatePolicyEnabled:
       return RTCTcpCandidatePolicyEnabled;
     case webrtc::PeerConnectionInterface::kTcpCandidatePolicyDisabled:
       return RTCTcpCandidatePolicyDisabled;
   }
 }
 
 + (NSString *)stringForTcpCandidatePolicy:(RTCTcpCandidatePolicy)policy {
   switch (policy) {
     case RTCTcpCandidatePolicyEnabled:
       return @"TCP_ENABLED";
     case RTCTcpCandidatePolicyDisabled:
       return @"TCP_DISABLED";
   }
 }
 
++ (RTCCandidateNetworkPolicy)candidateNetworkPolicyForNativePolicy:
+    (webrtc::PeerConnectionInterface::CandidateNetworkPolicy)nativePolicy {
+  switch (nativePolicy) {
+    case webrtc::PeerConnectionInterface::kCandidateNetworkPolicyAll:
+      return RTCCandidateNetworkPolicyAll;
+    case webrtc::PeerConnectionInterface::kCandidateNetworkPolicyLowCost:
+      return RTCCandidateNetworkPolicyLowCost;
+  }
+}
+
++ (NSString *)stringForCandidateNetworkPolicy:
+    (RTCCandidateNetworkPolicy)policy {
+  switch (policy) {
+    case RTCCandidateNetworkPolicyAll:
+      return @"CANDIDATE_ALL_NETWORKS";
+    case RTCCandidateNetworkPolicyLowCost:
+      return @"CANDIDATE_LOW_COST_NETWORKS";
+  }
+}
+
 + (webrtc::PeerConnectionInterface::ContinualGatheringPolicy)
     nativeContinualGatheringPolicyForPolicy:
         (RTCContinualGatheringPolicy)policy {
   switch (policy) {
     case RTCContinualGatheringPolicyGatherOnce:
       return webrtc::PeerConnectionInterface::GATHER_ONCE;
     case RTCContinualGatheringPolicyGatherContinually:
       return webrtc::PeerConnectionInterface::GATHER_CONTINUALLY;
   }
 }
@@ skipping 12 matching lines @@
     (RTCContinualGatheringPolicy)policy {
   switch (policy) {
     case RTCContinualGatheringPolicyGatherOnce:
       return @"GATHER_ONCE";
     case RTCContinualGatheringPolicyGatherContinually:
       return @"GATHER_CONTINUALLY";
   }
 }
 
 @end