Ping backup connection at a slower rate

talk/app/webrtc/java/jni/peerconnection_jni.cc

 /*
  * libjingle
  * Copyright 2013 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,
@@ skipping 1534 matching lines @@
   jobject j_ice_servers = GetObjectField(jni, j_rtc_config, j_ice_servers_id);
 
   jfieldID j_audio_jitter_buffer_max_packets_id =
       GetFieldID(jni, j_rtc_config_class, "audioJitterBufferMaxPackets", "I");
   jfieldID j_audio_jitter_buffer_fast_accelerate_id = GetFieldID(
       jni, j_rtc_config_class, "audioJitterBufferFastAccelerate", "Z");
 
   jfieldID j_ice_connection_receiving_timeout_id =
       GetFieldID(jni, j_rtc_config_class, "iceConnectionReceivingTimeout", "I");
 
+  jfieldID j_ice_backup_connection_ping_interval_id = GetFieldID(
+      jni, j_rtc_config_class, "iceBackupConnectionPingInterval", "I");

[pthatcher1, 2015/12/01 19:40:25]

We should start using "candidate pair" instead of "connection", especially in
public APIs. So, iceBackupCandidatePairPingInterval

[honghaiz3, 2015/12/01 23:43:08]

Done. Also changed the one ice_backup_connection to ice_backup_candidate_pair to
be consistent. Kept the name backup_connection* in IceConfig. 

+
   jfieldID j_continual_gathering_policy_id =
       GetFieldID(jni, j_rtc_config_class, "continualGatheringPolicy",
                  "Lorg/webrtc/PeerConnection$ContinualGatheringPolicy;");
   jobject j_continual_gathering_policy =
       GetObjectField(jni, j_rtc_config, j_continual_gathering_policy_id);
 
   rtc_config->type =
       JavaIceTransportsTypeToNativeType(jni, j_ice_transports_type);
   rtc_config->bundle_policy =
       JavaBundlePolicyToNativeType(jni, j_bundle_policy);
   rtc_config->rtcp_mux_policy =
       JavaRtcpMuxPolicyToNativeType(jni, j_rtcp_mux_policy);
   rtc_config->tcp_candidate_policy =
       JavaTcpCandidatePolicyToNativeType(jni, j_tcp_candidate_policy);
   JavaIceServersToJsepIceServers(jni, j_ice_servers, &rtc_config->servers);
   rtc_config->audio_jitter_buffer_max_packets =
       GetIntField(jni, j_rtc_config, j_audio_jitter_buffer_max_packets_id);
   rtc_config->audio_jitter_buffer_fast_accelerate = GetBooleanField(
       jni, j_rtc_config, j_audio_jitter_buffer_fast_accelerate_id);
   rtc_config->ice_connection_receiving_timeout =
       GetIntField(jni, j_rtc_config, j_ice_connection_receiving_timeout_id);
+  rtc_config->ice_backup_connection_ping_interval =
+      GetIntField(jni, j_rtc_config, j_ice_backup_connection_ping_interval_id);
   rtc_config->continual_gathering_policy =
       JavaContinualGatheringPolicyToNativeType(
           jni, j_continual_gathering_policy);
 }
 
 JOW(jlong, PeerConnectionFactory_nativeCreatePeerConnection)(
     JNIEnv *jni, jclass, jlong factory, jobject j_rtc_config,
     jobject j_constraints, jlong observer_p) {
   rtc::scoped_refptr<PeerConnectionFactoryInterface> f(
       reinterpret_cast<PeerConnectionFactoryInterface*>(
@@ skipping 509 matching lines @@
   return JavaStringFromStdString(
       jni,
       reinterpret_cast<RtpReceiverInterface*>(j_rtp_receiver_pointer)->id());
 }
 
 JOW(void, RtpReceiver_free)(JNIEnv* jni, jclass, jlong j_rtp_receiver_pointer) {
   reinterpret_cast<RtpReceiverInterface*>(j_rtp_receiver_pointer)->Release();
 }
 
 }  // namespace webrtc_jni