commit b0afeaa107ef9279c1c0cda38f3b5842077a66fc Author: Hashik Donthineni HashikDonthineni@gmail.com Date: Tue Jun 9 17:59:36 2020 +0530

Network calls to send answer and establish connection --- .../torproject/snowflake/MyPersistentService.java | 85 +++++++++++++++++++++- .../snowflake/services/RetroServiceGenerator.java | 2 +- 2 files changed, 82 insertions(+), 5 deletions(-)

diff --git a/app/src/main/java/org/torproject/snowflake/MyPersistentService.java b/app/src/main/java/org/torproject/snowflake/MyPersistentService.java index 686156a..60cd0e0 100644 --- a/app/src/main/java/org/torproject/snowflake/MyPersistentService.java +++ b/app/src/main/java/org/torproject/snowflake/MyPersistentService.java @@ -18,11 +18,16 @@ import org.json.JSONException; import org.torproject.snowflake.constants.BrokerConstants; import org.torproject.snowflake.constants.ForegroundServiceConstants; import org.torproject.snowflake.interfaces.PeerConnectionObserverCallback; +import org.torproject.snowflake.pojo.AnsResponse; +import org.torproject.snowflake.pojo.AnswerBody; +import org.torproject.snowflake.pojo.AnswerBodySDP; import org.torproject.snowflake.pojo.OfferRequestBody; import org.torproject.snowflake.pojo.SDPOfferResponse; import org.torproject.snowflake.services.GetOfferService; import org.torproject.snowflake.services.RetroServiceGenerator; +import org.torproject.snowflake.services.SendAnswerService; import org.webrtc.DataChannel; +import org.webrtc.MediaConstraints; import org.webrtc.PeerConnection; import org.webrtc.PeerConnectionFactory; import org.webrtc.SessionDescription; @@ -209,7 +214,6 @@ public class MyPersistentService extends Service { Log.d(TAG, "stopService: Failed with: " + e.getMessage()); } } - /////////////// WebRTC ////////////////////////

/** @@ -255,8 +259,8 @@ public class MyPersistentService extends Service { public void onIceGatheringFinish() { if (mainPeerConnection.connectionState() != PeerConnection.PeerConnectionState.CLOSED) { Log.d(TAG, "onIceGatheringFinish: Ice Gathering Finished. Sending Answer to broker...\n" + mainPeerConnection.getLocalDescription().description); - //Sending the SDP Answer to the server. - //TODO:Send Answer + //Ice gathering finished. Sending the SDP Answer to the server. + sendAnswer(mainPeerConnection.getLocalDescription()); } }

@@ -282,12 +286,37 @@ public class MyPersistentService extends Service { @Override public void dataChannelStateChange(final DataChannel.State STATE) { Log.d(TAG, "dataChannelStateChange: Data Channel State: " + STATE); + if(STATE == DataChannel.State.OPEN){ + updateNotification("Connection Established. Serving one client."); + } } });

Log.d(TAG, "createPeerConnection: Finished creating peer connection."); return factory.createPeerConnection(rtcConfiguration, pcObserver); } + + /** + * Create SDP answer to send it to broker. + */ + private void createAnswer() { + Log.d(TAG, "createAnswer: Starting Creating Answer..."); + //CreateAnswer fires the request to get ICE candidates and finish the SDP. We can listen to all these events on the corresponding observers. + mainPeerConnection.createAnswer(new SimpleSdpObserver("Local: Answer") { + @Override + public void onCreateSuccess(SessionDescription sessionDescription) { + mainPeerConnection.setLocalDescription(new SimpleSdpObserver("Local"), sessionDescription); + //Wait till ICE Gathering/ Trickling is finished to send the answer. + } + + @Override + public void onCreateFailure(String s) { + Log.e(TAG, "onCreateFailure: FAILED:" + s); + } + }, new MediaConstraints()); + updateNotification("Answer creation finished, establishing connection..."); + } + /////////////// Network Calls ////////////////////////

/** @@ -318,7 +347,7 @@ public class MyPersistentService extends Service { SessionDescription offer = SDPSerializer.deserializeOffer(sdpOfferResponse.getOffer()); Log.d(TAG, "requestSuccess: Remote Description (OFFER):\n" + offer.description); mainPeerConnection.setRemoteDescription(new SimpleSdpObserver("Remote: Offer"), offer); - //TODO: Create Answer + createAnswer(); } catch (JSONException e) { Log.d(TAG, "requestSuccess: Serialization Failed:"); e.printStackTrace(); @@ -342,4 +371,52 @@ public class MyPersistentService extends Service { if (isServiceStarted) fetchOffer(); //Sending request for offer again. } + + /** + * Sending answer to the broker. + */ + public void sendAnswer(SessionDescription sessionDescription) { + Log.d(TAG, "sendAnswer: Sending SDP Answer"); + AnswerBodySDP bodySDP = new AnswerBodySDP(); + bodySDP.setSdp(SDPSerializer.serializeAnswer(sessionDescription)); + AnswerBody body = new AnswerBody("555", bodySDP.toString()); //TODO:Use randomly Generate SID from sendRequest + SendAnswerService service = RetroServiceGenerator.createService(SendAnswerService.class); + Observable<AnsResponse> response = service.sendAnswer(body); + serviceDisposable = response.subscribeOn(Schedulers.io()) + .observeOn(AndroidSchedulers.mainThread()).subscribe(this::answerResponseSuccess, this::answerResponseFailure); + } + + /** + * Sending answer to broker succeeded + * + * @param ansResponse + */ + private void answerResponseSuccess(AnsResponse ansResponse) { + if (ansResponse.getStatus().equals(BrokerConstants.CLIENT_GONE)) { + Log.d(TAG, "answerResponseSuccess: Client Gone"); + closeConnectionAndResend(); + } else { + Log.d(TAG, "answerResponseSuccess: Sending Success"); + } + } + + /** + * Sending answer to broker failed. + * + * @param throwable + */ + private void answerResponseFailure(Throwable throwable) { + Log.e(TAG, "answerResponseFailure: " + throwable.getMessage()); + } + + /** + * Closing the connection and resending the request to get SDP. + */ + private void closeConnectionAndResend() { + Log.d(TAG, "closeConnectionAndResend: Closing connection and resending request."); + //Closing both to avoid memory leak. + mainDataChannel.close(); + mainPeerConnection.close(); + fetchOffer(); //Sending request for offer again. + } } diff --git a/app/src/main/java/org/torproject/snowflake/services/RetroServiceGenerator.java b/app/src/main/java/org/torproject/snowflake/services/RetroServiceGenerator.java index 74f1d9d..9bbb945 100644 --- a/app/src/main/java/org/torproject/snowflake/services/RetroServiceGenerator.java +++ b/app/src/main/java/org/torproject/snowflake/services/RetroServiceGenerator.java @@ -21,7 +21,7 @@ public class RetroServiceGenerator {

OkHttpClient.Builder httpClient = new OkHttpClient.Builder(); - + //TODO:Set Custom Time Out (Long Polling) if (BuildConfig.DEBUG) { HttpLoggingInterceptor interceptor = new HttpLoggingInterceptor(); interceptor.level(HttpLoggingInterceptor.Level.BODY);