WifiDisplaySource.cpp revision 28e17ed7e2fbb254fb99481b74db85e427c905ee 
1/*
2 * Copyright 2012, The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *     http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17//#define LOG_NDEBUG 0
18#define LOG_TAG "WifiDisplaySource"
19#include <utils/Log.h>
20
21#include "WifiDisplaySource.h"
22#include "PlaybackSession.h"
23#include "Parameters.h"
24#include "ParsedMessage.h"
25
26#include <binder/IServiceManager.h>
27#include <gui/ISurfaceTexture.h>
28#include <media/IHDCP.h>
29#include <media/IMediaPlayerService.h>
30#include <media/IRemoteDisplayClient.h>
31#include <media/stagefright/foundation/ABuffer.h>
32#include <media/stagefright/foundation/ADebug.h>
33#include <media/stagefright/foundation/AMessage.h>
34#include <media/stagefright/MediaErrors.h>
35
36#include <arpa/inet.h>
37#include <cutils/properties.h>
38
39namespace android {
40
41WifiDisplaySource::WifiDisplaySource(
42        const sp<ANetworkSession> &netSession,
43        const sp<IRemoteDisplayClient> &client)
44    : mNetSession(netSession),
45      mClient(client),
46      mSessionID(0),
47      mStopReplyID(0),
48      mClientSessionID(0),
49      mReaperPending(false),
50      mNextCSeq(1)
51#if REQUIRE_HDCP
52      ,mIsHDCP2_0(false)
53      ,mHDCPPort(0)
54      ,mHDCPInitializationComplete(false)
55      ,mSetupTriggerDeferred(false)
56#endif
57{
58}
59
60WifiDisplaySource::~WifiDisplaySource() {
61}
62
63status_t WifiDisplaySource::start(const char *iface) {
64    sp<AMessage> msg = new AMessage(kWhatStart, id());
65    msg->setString("iface", iface);
66
67    sp<AMessage> response;
68    status_t err = msg->postAndAwaitResponse(&response);
69
70    if (err != OK) {
71        return err;
72    }
73
74    if (!response->findInt32("err", &err)) {
75        err = OK;
76    }
77
78    return err;
79}
80
81status_t WifiDisplaySource::stop() {
82    sp<AMessage> msg = new AMessage(kWhatStop, id());
83
84    sp<AMessage> response;
85    status_t err = msg->postAndAwaitResponse(&response);
86
87    if (err != OK) {
88        return err;
89    }
90
91    if (!response->findInt32("err", &err)) {
92        err = OK;
93    }
94
95    return err;
96}
97
98void WifiDisplaySource::onMessageReceived(const sp<AMessage> &msg) {
99    switch (msg->what()) {
100        case kWhatStart:
101        {
102            uint32_t replyID;
103            CHECK(msg->senderAwaitsResponse(&replyID));
104
105            AString iface;
106            CHECK(msg->findString("iface", &iface));
107
108            status_t err = OK;
109
110            ssize_t colonPos = iface.find(":");
111
112            unsigned long port;
113
114            if (colonPos >= 0) {
115                const char *s = iface.c_str() + colonPos + 1;
116
117                char *end;
118                port = strtoul(s, &end, 10);
119
120                if (end == s || *end != '\0' || port > 65535) {
121                    err = -EINVAL;
122                } else {
123                    iface.erase(colonPos, iface.size() - colonPos);
124                }
125            } else {
126                port = kWifiDisplayDefaultPort;
127            }
128
129            if (err == OK) {
130                if (inet_aton(iface.c_str(), &mInterfaceAddr) != 0) {
131                    sp<AMessage> notify = new AMessage(kWhatRTSPNotify, id());
132
133                    err = mNetSession->createRTSPServer(
134                            mInterfaceAddr, port, notify, &mSessionID);
135                } else {
136                    err = -EINVAL;
137                }
138            }
139
140            sp<AMessage> response = new AMessage;
141            response->setInt32("err", err);
142            response->postReply(replyID);
143            break;
144        }
145
146        case kWhatRTSPNotify:
147        {
148            int32_t reason;
149            CHECK(msg->findInt32("reason", &reason));
150
151            switch (reason) {
152                case ANetworkSession::kWhatError:
153                {
154                    int32_t sessionID;
155                    CHECK(msg->findInt32("sessionID", &sessionID));
156
157                    int32_t err;
158                    CHECK(msg->findInt32("err", &err));
159
160                    AString detail;
161                    CHECK(msg->findString("detail", &detail));
162
163                    ALOGE("An error occurred in session %d (%d, '%s/%s').",
164                          sessionID,
165                          err,
166                          detail.c_str(),
167                          strerror(-err));
168
169                    mNetSession->destroySession(sessionID);
170
171                    if (sessionID == mClientSessionID) {
172                        mClientSessionID = -1;
173
174                        disconnectClient(UNKNOWN_ERROR);
175                    }
176                    break;
177                }
178
179                case ANetworkSession::kWhatClientConnected:
180                {
181                    int32_t sessionID;
182                    CHECK(msg->findInt32("sessionID", &sessionID));
183
184                    if (mClientSessionID > 0) {
185                        ALOGW("A client tried to connect, but we already "
186                              "have one.");
187
188                        mNetSession->destroySession(sessionID);
189                        break;
190                    }
191
192                    CHECK(msg->findString("client-ip", &mClientInfo.mRemoteIP));
193                    CHECK(msg->findString("server-ip", &mClientInfo.mLocalIP));
194
195                    if (mClientInfo.mRemoteIP == mClientInfo.mLocalIP) {
196                        // Disallow connections from the local interface
197                        // for security reasons.
198                        mNetSession->destroySession(sessionID);
199                        break;
200                    }
201
202                    CHECK(msg->findInt32(
203                                "server-port", &mClientInfo.mLocalPort));
204                    mClientInfo.mPlaybackSessionID = -1;
205
206                    mClientSessionID = sessionID;
207
208                    ALOGI("We now have a client (%d) connected.", sessionID);
209
210                    status_t err = sendM1(sessionID);
211                    CHECK_EQ(err, (status_t)OK);
212                    break;
213                }
214
215                case ANetworkSession::kWhatData:
216                {
217                    status_t err = onReceiveClientData(msg);
218
219                    if (err != OK) {
220                        disconnectClient(err);
221                    }
222                    break;
223                }
224
225                default:
226                    TRESPASS();
227            }
228            break;
229        }
230
231        case kWhatStop:
232        {
233            uint32_t replyID;
234            CHECK(msg->senderAwaitsResponse(&replyID));
235
236            if (mSessionID != 0 && mClientSessionID != 0) {
237                status_t err = sendM5(
238                        mClientSessionID, true /* requestShutdown */);
239
240                if (err == OK) {
241                    mStopReplyID = replyID;
242                    break;
243                }
244            }
245
246            finishStop(replyID);
247            break;
248        }
249
250        case kWhatReapDeadClients:
251        {
252            mReaperPending = false;
253
254            if (mClientSessionID == 0
255                    || mClientInfo.mPlaybackSession == NULL) {
256                break;
257            }
258
259            if (mClientInfo.mPlaybackSession->getLastLifesignUs()
260                    + kPlaybackSessionTimeoutUs < ALooper::GetNowUs()) {
261                ALOGI("playback session timed out, reaping.");
262
263                disconnectClient(-ETIMEDOUT);
264            } else {
265                scheduleReaper();
266            }
267            break;
268        }
269
270        case kWhatPlaybackSessionNotify:
271        {
272            int32_t playbackSessionID;
273            CHECK(msg->findInt32("playbackSessionID", &playbackSessionID));
274
275            int32_t what;
276            CHECK(msg->findInt32("what", &what));
277
278            if (what == PlaybackSession::kWhatSessionDead) {
279                ALOGI("playback session wants to quit.");
280
281                disconnectClient(UNKNOWN_ERROR);
282            } else if (what == PlaybackSession::kWhatSessionEstablished) {
283                if (mClient != NULL) {
284                    mClient->onDisplayConnected(
285                            mClientInfo.mPlaybackSession->getSurfaceTexture(),
286                            mClientInfo.mPlaybackSession->width(),
287                            mClientInfo.mPlaybackSession->height(),
288                            0 /* flags */);
289                }
290            } else {
291                CHECK_EQ(what, PlaybackSession::kWhatBinaryData);
292
293                int32_t channel;
294                CHECK(msg->findInt32("channel", &channel));
295
296                sp<ABuffer> data;
297                CHECK(msg->findBuffer("data", &data));
298
299                CHECK_LE(channel, 0xffu);
300                CHECK_LE(data->size(), 0xffffu);
301
302                int32_t sessionID;
303                CHECK(msg->findInt32("sessionID", &sessionID));
304
305                char header[4];
306                header[0] = '$';
307                header[1] = channel;
308                header[2] = data->size() >> 8;
309                header[3] = data->size() & 0xff;
310
311                mNetSession->sendRequest(
312                        sessionID, header, sizeof(header));
313
314                mNetSession->sendRequest(
315                        sessionID, data->data(), data->size());
316            }
317            break;
318        }
319
320        case kWhatKeepAlive:
321        {
322            int32_t sessionID;
323            CHECK(msg->findInt32("sessionID", &sessionID));
324
325            if (mClientSessionID != sessionID) {
326                // Obsolete event, client is already gone.
327                break;
328            }
329
330            sendM16(sessionID);
331            break;
332        }
333
334#if REQUIRE_HDCP
335        case kWhatHDCPNotify:
336        {
337            int32_t msgCode, ext1, ext2;
338            CHECK(msg->findInt32("msg", &msgCode));
339            CHECK(msg->findInt32("ext1", &ext1));
340            CHECK(msg->findInt32("ext2", &ext2));
341
342            ALOGV("Saw HDCP notification code %d, ext1 %d, ext2 %d",
343                    msgCode, ext1, ext2);
344
345            switch (msgCode) {
346                case HDCPModule::HDCP_INITIALIZATION_COMPLETE:
347                {
348                    mHDCPInitializationComplete = true;
349
350                    if (mSetupTriggerDeferred) {
351                        mSetupTriggerDeferred = false;
352
353                        sendM5(mClientSessionID, false /* requestShutdown */);
354                    }
355                    break;
356                }
357
358                default:
359                {
360                    ALOGE("HDCP failure, shutting down.");
361
362                    disconnectClient(-EACCES);
363                    break;
364                }
365            }
366            break;
367        }
368#endif
369
370        default:
371            TRESPASS();
372    }
373}
374
375void WifiDisplaySource::registerResponseHandler(
376        int32_t sessionID, int32_t cseq, HandleRTSPResponseFunc func) {
377    ResponseID id;
378    id.mSessionID = sessionID;
379    id.mCSeq = cseq;
380    mResponseHandlers.add(id, func);
381}
382
383status_t WifiDisplaySource::sendM1(int32_t sessionID) {
384    AString request = "OPTIONS * RTSP/1.0\r\n";
385    AppendCommonResponse(&request, mNextCSeq);
386
387    request.append(
388            "Require: org.wfa.wfd1.0\r\n"
389            "\r\n");
390
391    status_t err =
392        mNetSession->sendRequest(sessionID, request.c_str(), request.size());
393
394    if (err != OK) {
395        return err;
396    }
397
398    registerResponseHandler(
399            sessionID, mNextCSeq, &WifiDisplaySource::onReceiveM1Response);
400
401    ++mNextCSeq;
402
403    return OK;
404}
405
406status_t WifiDisplaySource::sendM3(int32_t sessionID) {
407    AString body =
408#if REQUIRE_HDCP
409        "wfd_content_protection\r\n"
410#endif
411        "wfd_video_formats\r\n"
412        "wfd_audio_codecs\r\n"
413        "wfd_client_rtp_ports\r\n";
414
415    AString request = "GET_PARAMETER rtsp://localhost/wfd1.0 RTSP/1.0\r\n";
416    AppendCommonResponse(&request, mNextCSeq);
417
418    request.append("Content-Type: text/parameters\r\n");
419    request.append(StringPrintf("Content-Length: %d\r\n", body.size()));
420    request.append("\r\n");
421    request.append(body);
422
423    status_t err =
424        mNetSession->sendRequest(sessionID, request.c_str(), request.size());
425
426    if (err != OK) {
427        return err;
428    }
429
430    registerResponseHandler(
431            sessionID, mNextCSeq, &WifiDisplaySource::onReceiveM3Response);
432
433    ++mNextCSeq;
434
435    return OK;
436}
437
438status_t WifiDisplaySource::sendM4(int32_t sessionID) {
439    // wfd_video_formats:
440    // 1 byte "native"
441    // 1 byte "preferred-display-mode-supported" 0 or 1
442    // one or more avc codec structures
443    //   1 byte profile
444    //   1 byte level
445    //   4 byte CEA mask
446    //   4 byte VESA mask
447    //   4 byte HH mask
448    //   1 byte latency
449    //   2 byte min-slice-slice
450    //   2 byte slice-enc-params
451    //   1 byte framerate-control-support
452    //   max-hres (none or 2 byte)
453    //   max-vres (none or 2 byte)
454
455    CHECK_EQ(sessionID, mClientSessionID);
456
457    AString transportString = "UDP";
458
459    char val[PROPERTY_VALUE_MAX];
460    if (property_get("media.wfd.enable-tcp", val, NULL)
461            && (!strcasecmp("true", val) || !strcmp("1", val))) {
462        ALOGI("Using TCP transport.");
463        transportString = "TCP";
464    }
465
466    // For 720p60:
467    //   use "30 00 02 02 00000040 00000000 00000000 00 0000 0000 00 none none\r\n"
468    // For 720p30:
469    //   use "28 00 02 02 00000020 00000000 00000000 00 0000 0000 00 none none\r\n"
470    AString body = StringPrintf(
471        "wfd_video_formats: "
472        "28 00 02 02 00000020 00000000 00000000 00 0000 0000 00 none none\r\n"
473        "wfd_audio_codecs: AAC 00000001 00\r\n"  // 2 ch AAC 48kHz
474        "wfd_presentation_URL: rtsp://%s:%d/wfd1.0/streamid=0 none\r\n"
475        "wfd_client_rtp_ports: RTP/AVP/%s;unicast 19000 0 mode=play\r\n",
476        mClientInfo.mLocalIP.c_str(), mClientInfo.mLocalPort,
477        transportString.c_str());
478
479    AString request = "SET_PARAMETER rtsp://localhost/wfd1.0 RTSP/1.0\r\n";
480    AppendCommonResponse(&request, mNextCSeq);
481
482    request.append("Content-Type: text/parameters\r\n");
483    request.append(StringPrintf("Content-Length: %d\r\n", body.size()));
484    request.append("\r\n");
485    request.append(body);
486
487    status_t err =
488        mNetSession->sendRequest(sessionID, request.c_str(), request.size());
489
490    if (err != OK) {
491        return err;
492    }
493
494    registerResponseHandler(
495            sessionID, mNextCSeq, &WifiDisplaySource::onReceiveM4Response);
496
497    ++mNextCSeq;
498
499    return OK;
500}
501
502status_t WifiDisplaySource::sendM5(int32_t sessionID, bool requestShutdown) {
503    AString body = "wfd_trigger_method: ";
504    if (requestShutdown) {
505        body.append("TEARDOWN");
506    } else {
507        body.append("SETUP");
508    }
509
510    body.append("\r\n");
511
512    AString request = "SET_PARAMETER rtsp://localhost/wfd1.0 RTSP/1.0\r\n";
513    AppendCommonResponse(&request, mNextCSeq);
514
515    request.append("Content-Type: text/parameters\r\n");
516    request.append(StringPrintf("Content-Length: %d\r\n", body.size()));
517    request.append("\r\n");
518    request.append(body);
519
520    status_t err =
521        mNetSession->sendRequest(sessionID, request.c_str(), request.size());
522
523    if (err != OK) {
524        return err;
525    }
526
527    registerResponseHandler(
528            sessionID, mNextCSeq, &WifiDisplaySource::onReceiveM5Response);
529
530    ++mNextCSeq;
531
532    return OK;
533}
534
535status_t WifiDisplaySource::sendM16(int32_t sessionID) {
536    AString request = "GET_PARAMETER rtsp://localhost/wfd1.0 RTSP/1.0\r\n";
537    AppendCommonResponse(&request, mNextCSeq);
538
539    CHECK_EQ(sessionID, mClientSessionID);
540    request.append(
541            StringPrintf("Session: %d\r\n", mClientInfo.mPlaybackSessionID));
542    request.append("\r\n");  // Empty body
543
544    status_t err =
545        mNetSession->sendRequest(sessionID, request.c_str(), request.size());
546
547    if (err != OK) {
548        return err;
549    }
550
551    registerResponseHandler(
552            sessionID, mNextCSeq, &WifiDisplaySource::onReceiveM16Response);
553
554    ++mNextCSeq;
555
556    return OK;
557}
558
559status_t WifiDisplaySource::onReceiveM1Response(
560        int32_t sessionID, const sp<ParsedMessage> &msg) {
561    int32_t statusCode;
562    if (!msg->getStatusCode(&statusCode)) {
563        return ERROR_MALFORMED;
564    }
565
566    if (statusCode != 200) {
567        return ERROR_UNSUPPORTED;
568    }
569
570    return OK;
571}
572
573status_t WifiDisplaySource::onReceiveM3Response(
574        int32_t sessionID, const sp<ParsedMessage> &msg) {
575    int32_t statusCode;
576    if (!msg->getStatusCode(&statusCode)) {
577        return ERROR_MALFORMED;
578    }
579
580    if (statusCode != 200) {
581        return ERROR_UNSUPPORTED;
582    }
583
584    sp<Parameters> params =
585        Parameters::Parse(msg->getContent(), strlen(msg->getContent()));
586
587    if (params == NULL) {
588        return ERROR_MALFORMED;
589    }
590
591#if REQUIRE_HDCP
592    AString value;
593    if (!params->findParameter("wfd_content_protection", &value)) {
594        ALOGE("Sink doesn't appear to support content protection.");
595        return -EACCES;
596    }
597
598    if (value == "none") {
599        ALOGE("Sink does not support content protection.");
600        return -EACCES;
601    }
602
603    bool isHDCP2_0 = false;
604    if (value.startsWith("HDCP2.0 ")) {
605        isHDCP2_0 = true;
606    } else if (!value.startsWith("HDCP2.1 ")) {
607        return ERROR_MALFORMED;
608    }
609
610    int32_t hdcpPort;
611    if (!ParsedMessage::GetInt32Attribute(value.c_str() + 8, "port", &hdcpPort)
612            || hdcpPort < 1 || hdcpPort > 65535) {
613        return ERROR_MALFORMED;
614    }
615
616    mIsHDCP2_0 = isHDCP2_0;
617    mHDCPPort = hdcpPort;
618
619    status_t err = makeHDCP();
620    if (err != OK) {
621        ALOGE("Unable to instantiate HDCP component.");
622        return err;
623    }
624#endif
625
626    return sendM4(sessionID);
627}
628
629status_t WifiDisplaySource::onReceiveM4Response(
630        int32_t sessionID, const sp<ParsedMessage> &msg) {
631    int32_t statusCode;
632    if (!msg->getStatusCode(&statusCode)) {
633        return ERROR_MALFORMED;
634    }
635
636    if (statusCode != 200) {
637        return ERROR_UNSUPPORTED;
638    }
639
640#if REQUIRE_HDCP
641    if (!mHDCPInitializationComplete) {
642        ALOGI("Deferring SETUP trigger until HDCP initialization completes.");
643
644        mSetupTriggerDeferred = true;
645        return OK;
646    }
647#endif
648
649    return sendM5(sessionID, false /* requestShutdown */);
650}
651
652status_t WifiDisplaySource::onReceiveM5Response(
653        int32_t sessionID, const sp<ParsedMessage> &msg) {
654    int32_t statusCode;
655    if (!msg->getStatusCode(&statusCode)) {
656        return ERROR_MALFORMED;
657    }
658
659    if (statusCode != 200) {
660        return ERROR_UNSUPPORTED;
661    }
662
663    return OK;
664}
665
666status_t WifiDisplaySource::onReceiveM16Response(
667        int32_t sessionID, const sp<ParsedMessage> &msg) {
668    // If only the response was required to include a "Session:" header...
669
670    CHECK_EQ(sessionID, mClientSessionID);
671
672    if (mClientInfo.mPlaybackSession != NULL) {
673        mClientInfo.mPlaybackSession->updateLiveness();
674
675        scheduleKeepAlive(sessionID);
676    }
677
678    return OK;
679}
680
681void WifiDisplaySource::scheduleReaper() {
682    if (mReaperPending) {
683        return;
684    }
685
686    mReaperPending = true;
687    (new AMessage(kWhatReapDeadClients, id()))->post(kReaperIntervalUs);
688}
689
690void WifiDisplaySource::scheduleKeepAlive(int32_t sessionID) {
691    // We need to send updates at least 5 secs before the timeout is set to
692    // expire, make sure the timeout is greater than 5 secs to begin with.
693    CHECK_GT(kPlaybackSessionTimeoutUs, 5000000ll);
694
695    sp<AMessage> msg = new AMessage(kWhatKeepAlive, id());
696    msg->setInt32("sessionID", sessionID);
697    msg->post(kPlaybackSessionTimeoutUs - 5000000ll);
698}
699
700status_t WifiDisplaySource::onReceiveClientData(const sp<AMessage> &msg) {
701    int32_t sessionID;
702    CHECK(msg->findInt32("sessionID", &sessionID));
703
704    sp<RefBase> obj;
705    CHECK(msg->findObject("data", &obj));
706
707    sp<ParsedMessage> data =
708        static_cast<ParsedMessage *>(obj.get());
709
710    ALOGV("session %d received '%s'",
711          sessionID, data->debugString().c_str());
712
713    AString method;
714    AString uri;
715    data->getRequestField(0, &method);
716
717    int32_t cseq;
718    if (!data->findInt32("cseq", &cseq)) {
719        sendErrorResponse(sessionID, "400 Bad Request", -1 /* cseq */);
720        return ERROR_MALFORMED;
721    }
722
723    if (method.startsWith("RTSP/")) {
724        // This is a response.
725
726        ResponseID id;
727        id.mSessionID = sessionID;
728        id.mCSeq = cseq;
729
730        ssize_t index = mResponseHandlers.indexOfKey(id);
731
732        if (index < 0) {
733            ALOGW("Received unsolicited server response, cseq %d", cseq);
734            return ERROR_MALFORMED;
735        }
736
737        HandleRTSPResponseFunc func = mResponseHandlers.valueAt(index);
738        mResponseHandlers.removeItemsAt(index);
739
740        status_t err = (this->*func)(sessionID, data);
741
742        if (err != OK) {
743            ALOGW("Response handler for session %d, cseq %d returned "
744                  "err %d (%s)",
745                  sessionID, cseq, err, strerror(-err));
746
747            return err;
748        }
749
750        return OK;
751    }
752
753    AString version;
754    data->getRequestField(2, &version);
755    if (!(version == AString("RTSP/1.0"))) {
756        sendErrorResponse(sessionID, "505 RTSP Version not supported", cseq);
757        return ERROR_UNSUPPORTED;
758    }
759
760    status_t err;
761    if (method == "OPTIONS") {
762        err = onOptionsRequest(sessionID, cseq, data);
763    } else if (method == "SETUP") {
764        err = onSetupRequest(sessionID, cseq, data);
765    } else if (method == "PLAY") {
766        err = onPlayRequest(sessionID, cseq, data);
767    } else if (method == "PAUSE") {
768        err = onPauseRequest(sessionID, cseq, data);
769    } else if (method == "TEARDOWN") {
770        err = onTeardownRequest(sessionID, cseq, data);
771    } else if (method == "GET_PARAMETER") {
772        err = onGetParameterRequest(sessionID, cseq, data);
773    } else if (method == "SET_PARAMETER") {
774        err = onSetParameterRequest(sessionID, cseq, data);
775    } else {
776        sendErrorResponse(sessionID, "405 Method Not Allowed", cseq);
777
778        err = ERROR_UNSUPPORTED;
779    }
780
781    return err;
782}
783
784status_t WifiDisplaySource::onOptionsRequest(
785        int32_t sessionID,
786        int32_t cseq,
787        const sp<ParsedMessage> &data) {
788    int32_t playbackSessionID;
789    sp<PlaybackSession> playbackSession =
790        findPlaybackSession(data, &playbackSessionID);
791
792    if (playbackSession != NULL) {
793        playbackSession->updateLiveness();
794    }
795
796    AString response = "RTSP/1.0 200 OK\r\n";
797    AppendCommonResponse(&response, cseq);
798
799    response.append(
800            "Public: org.wfa.wfd1.0, SETUP, TEARDOWN, PLAY, PAUSE, "
801            "GET_PARAMETER, SET_PARAMETER\r\n");
802
803    response.append("\r\n");
804
805    status_t err = mNetSession->sendRequest(sessionID, response.c_str());
806
807    if (err == OK) {
808        err = sendM3(sessionID);
809    }
810
811    return err;
812}
813
814status_t WifiDisplaySource::onSetupRequest(
815        int32_t sessionID,
816        int32_t cseq,
817        const sp<ParsedMessage> &data) {
818    CHECK_EQ(sessionID, mClientSessionID);
819    if (mClientInfo.mPlaybackSessionID != -1) {
820        // We only support a single playback session per client.
821        // This is due to the reversed keep-alive design in the wfd specs...
822        sendErrorResponse(sessionID, "400 Bad Request", cseq);
823        return ERROR_MALFORMED;
824    }
825
826    AString transport;
827    if (!data->findString("transport", &transport)) {
828        sendErrorResponse(sessionID, "400 Bad Request", cseq);
829        return ERROR_MALFORMED;
830    }
831
832    PlaybackSession::TransportMode transportMode =
833        PlaybackSession::TRANSPORT_UDP;
834
835    int clientRtp, clientRtcp;
836    if (transport.startsWith("RTP/AVP/TCP;")) {
837        AString interleaved;
838        if (ParsedMessage::GetAttribute(
839                    transport.c_str(), "interleaved", &interleaved)
840                && sscanf(interleaved.c_str(), "%d-%d",
841                          &clientRtp, &clientRtcp) == 2) {
842            transportMode = PlaybackSession::TRANSPORT_TCP_INTERLEAVED;
843        } else {
844            bool badRequest = false;
845
846            AString clientPort;
847            if (!ParsedMessage::GetAttribute(
848                        transport.c_str(), "client_port", &clientPort)) {
849                badRequest = true;
850            } else if (sscanf(clientPort.c_str(), "%d-%d",
851                              &clientRtp, &clientRtcp) == 2) {
852            } else if (sscanf(clientPort.c_str(), "%d", &clientRtp) == 1) {
853                // No RTCP.
854                clientRtcp = -1;
855            } else {
856                badRequest = true;
857            }
858
859            if (badRequest) {
860                sendErrorResponse(sessionID, "400 Bad Request", cseq);
861                return ERROR_MALFORMED;
862            }
863
864            transportMode = PlaybackSession::TRANSPORT_TCP;
865        }
866    } else if (transport.startsWith("RTP/AVP;unicast;")
867            || transport.startsWith("RTP/AVP/UDP;unicast;")) {
868        bool badRequest = false;
869
870        AString clientPort;
871        if (!ParsedMessage::GetAttribute(
872                    transport.c_str(), "client_port", &clientPort)) {
873            badRequest = true;
874        } else if (sscanf(clientPort.c_str(), "%d-%d",
875                          &clientRtp, &clientRtcp) == 2) {
876        } else if (sscanf(clientPort.c_str(), "%d", &clientRtp) == 1) {
877            // No RTCP.
878            clientRtcp = -1;
879        } else {
880            badRequest = true;
881        }
882
883        if (badRequest) {
884            sendErrorResponse(sessionID, "400 Bad Request", cseq);
885            return ERROR_MALFORMED;
886        }
887#if 1
888    // The older LG dongles doesn't specify client_port=xxx apparently.
889    } else if (transport == "RTP/AVP/UDP;unicast") {
890        clientRtp = 19000;
891        clientRtcp = -1;
892#endif
893    } else {
894        sendErrorResponse(sessionID, "461 Unsupported Transport", cseq);
895        return ERROR_UNSUPPORTED;
896    }
897
898    int32_t playbackSessionID = makeUniquePlaybackSessionID();
899
900    sp<AMessage> notify = new AMessage(kWhatPlaybackSessionNotify, id());
901    notify->setInt32("playbackSessionID", playbackSessionID);
902    notify->setInt32("sessionID", sessionID);
903
904    sp<PlaybackSession> playbackSession =
905        new PlaybackSession(
906                mNetSession, notify, mInterfaceAddr,
907#if REQUIRE_HDCP
908                mHDCP
909#else
910                NULL
911#endif
912                );
913
914    looper()->registerHandler(playbackSession);
915
916    AString uri;
917    data->getRequestField(1, &uri);
918
919    if (strncasecmp("rtsp://", uri.c_str(), 7)) {
920        sendErrorResponse(sessionID, "400 Bad Request", cseq);
921        return ERROR_MALFORMED;
922    }
923
924    if (!(uri.startsWith("rtsp://") && uri.endsWith("/wfd1.0/streamid=0"))) {
925        sendErrorResponse(sessionID, "404 Not found", cseq);
926        return ERROR_MALFORMED;
927    }
928
929    status_t err = playbackSession->init(
930            mClientInfo.mRemoteIP.c_str(),
931            clientRtp,
932            clientRtcp,
933            transportMode);
934
935    if (err != OK) {
936        looper()->unregisterHandler(playbackSession->id());
937        playbackSession.clear();
938    }
939
940    switch (err) {
941        case OK:
942            break;
943        case -ENOENT:
944            sendErrorResponse(sessionID, "404 Not Found", cseq);
945            return err;
946        default:
947            sendErrorResponse(sessionID, "403 Forbidden", cseq);
948            return err;
949    }
950
951    mClientInfo.mPlaybackSessionID = playbackSessionID;
952    mClientInfo.mPlaybackSession = playbackSession;
953
954    AString response = "RTSP/1.0 200 OK\r\n";
955    AppendCommonResponse(&response, cseq, playbackSessionID);
956
957    if (transportMode == PlaybackSession::TRANSPORT_TCP_INTERLEAVED) {
958        response.append(
959                StringPrintf(
960                    "Transport: RTP/AVP/TCP;interleaved=%d-%d;",
961                    clientRtp, clientRtcp));
962    } else {
963        int32_t serverRtp = playbackSession->getRTPPort();
964
965        AString transportString = "UDP";
966        if (transportMode == PlaybackSession::TRANSPORT_TCP) {
967            transportString = "TCP";
968        }
969
970        if (clientRtcp >= 0) {
971            response.append(
972                    StringPrintf(
973                        "Transport: RTP/AVP/%s;unicast;client_port=%d-%d;"
974                        "server_port=%d-%d\r\n",
975                        transportString.c_str(),
976                        clientRtp, clientRtcp, serverRtp, serverRtp + 1));
977        } else {
978            response.append(
979                    StringPrintf(
980                        "Transport: RTP/AVP/%s;unicast;client_port=%d;"
981                        "server_port=%d\r\n",
982                        transportString.c_str(),
983                        clientRtp, serverRtp));
984        }
985    }
986
987    response.append("\r\n");
988
989    err = mNetSession->sendRequest(sessionID, response.c_str());
990
991    if (err != OK) {
992        return err;
993    }
994
995    scheduleReaper();
996    scheduleKeepAlive(sessionID);
997
998    return OK;
999}
1000
1001status_t WifiDisplaySource::onPlayRequest(
1002        int32_t sessionID,
1003        int32_t cseq,
1004        const sp<ParsedMessage> &data) {
1005    int32_t playbackSessionID;
1006    sp<PlaybackSession> playbackSession =
1007        findPlaybackSession(data, &playbackSessionID);
1008
1009    if (playbackSession == NULL) {
1010        sendErrorResponse(sessionID, "454 Session Not Found", cseq);
1011        return ERROR_MALFORMED;
1012    }
1013
1014    status_t err = playbackSession->play();
1015    CHECK_EQ(err, (status_t)OK);
1016
1017    AString response = "RTSP/1.0 200 OK\r\n";
1018    AppendCommonResponse(&response, cseq, playbackSessionID);
1019    response.append("Range: npt=now-\r\n");
1020    response.append("\r\n");
1021
1022    err = mNetSession->sendRequest(sessionID, response.c_str());
1023
1024    if (err != OK) {
1025        return err;
1026    }
1027
1028    playbackSession->finishPlay();
1029
1030    return OK;
1031}
1032
1033status_t WifiDisplaySource::onPauseRequest(
1034        int32_t sessionID,
1035        int32_t cseq,
1036        const sp<ParsedMessage> &data) {
1037    int32_t playbackSessionID;
1038    sp<PlaybackSession> playbackSession =
1039        findPlaybackSession(data, &playbackSessionID);
1040
1041    if (playbackSession == NULL) {
1042        sendErrorResponse(sessionID, "454 Session Not Found", cseq);
1043        return ERROR_MALFORMED;
1044    }
1045
1046    status_t err = playbackSession->pause();
1047    CHECK_EQ(err, (status_t)OK);
1048
1049    AString response = "RTSP/1.0 200 OK\r\n";
1050    AppendCommonResponse(&response, cseq, playbackSessionID);
1051    response.append("\r\n");
1052
1053    err = mNetSession->sendRequest(sessionID, response.c_str());
1054
1055    return err;
1056}
1057
1058status_t WifiDisplaySource::onTeardownRequest(
1059        int32_t sessionID,
1060        int32_t cseq,
1061        const sp<ParsedMessage> &data) {
1062    int32_t playbackSessionID;
1063    sp<PlaybackSession> playbackSession =
1064        findPlaybackSession(data, &playbackSessionID);
1065
1066    if (playbackSession == NULL) {
1067        sendErrorResponse(sessionID, "454 Session Not Found", cseq);
1068        return ERROR_MALFORMED;
1069    }
1070
1071    AString response = "RTSP/1.0 200 OK\r\n";
1072    AppendCommonResponse(&response, cseq, playbackSessionID);
1073    response.append("Connection: close\r\n");
1074    response.append("\r\n");
1075
1076    status_t err = mNetSession->sendRequest(sessionID, response.c_str());
1077
1078    if (err != OK) {
1079        return err;
1080    }
1081
1082    if (mStopReplyID != 0) {
1083        finishStop(mStopReplyID);
1084        mStopReplyID = 0;
1085    } else {
1086        disconnectClient(UNKNOWN_ERROR);
1087    }
1088
1089    return OK;
1090}
1091
1092void WifiDisplaySource::finishStop(uint32_t replyID) {
1093    disconnectClient(OK);
1094
1095#if REQUIRE_HDCP
1096    if (mHDCP != NULL) {
1097        mHDCP->shutdownAsync();
1098        mHDCP.clear();
1099    }
1100#endif
1101
1102    status_t err = OK;
1103
1104    sp<AMessage> response = new AMessage;
1105    response->setInt32("err", err);
1106    response->postReply(replyID);
1107}
1108
1109status_t WifiDisplaySource::onGetParameterRequest(
1110        int32_t sessionID,
1111        int32_t cseq,
1112        const sp<ParsedMessage> &data) {
1113    int32_t playbackSessionID;
1114    sp<PlaybackSession> playbackSession =
1115        findPlaybackSession(data, &playbackSessionID);
1116
1117    if (playbackSession == NULL) {
1118        sendErrorResponse(sessionID, "454 Session Not Found", cseq);
1119        return ERROR_MALFORMED;
1120    }
1121
1122    playbackSession->updateLiveness();
1123
1124    AString response = "RTSP/1.0 200 OK\r\n";
1125    AppendCommonResponse(&response, cseq, playbackSessionID);
1126    response.append("\r\n");
1127
1128    status_t err = mNetSession->sendRequest(sessionID, response.c_str());
1129    return err;
1130}
1131
1132status_t WifiDisplaySource::onSetParameterRequest(
1133        int32_t sessionID,
1134        int32_t cseq,
1135        const sp<ParsedMessage> &data) {
1136    int32_t playbackSessionID;
1137    sp<PlaybackSession> playbackSession =
1138        findPlaybackSession(data, &playbackSessionID);
1139
1140    if (playbackSession == NULL) {
1141        sendErrorResponse(sessionID, "454 Session Not Found", cseq);
1142        return ERROR_MALFORMED;
1143    }
1144
1145    if (strstr(data->getContent(), "wfd_idr_request\r\n")) {
1146        playbackSession->requestIDRFrame();
1147    }
1148
1149    playbackSession->updateLiveness();
1150
1151    AString response = "RTSP/1.0 200 OK\r\n";
1152    AppendCommonResponse(&response, cseq, playbackSessionID);
1153    response.append("\r\n");
1154
1155    status_t err = mNetSession->sendRequest(sessionID, response.c_str());
1156    return err;
1157}
1158
1159// static
1160void WifiDisplaySource::AppendCommonResponse(
1161        AString *response, int32_t cseq, int32_t playbackSessionID) {
1162    time_t now = time(NULL);
1163    struct tm *now2 = gmtime(&now);
1164    char buf[128];
1165    strftime(buf, sizeof(buf), "%a, %d %b %Y %H:%M:%S %z", now2);
1166
1167    response->append("Date: ");
1168    response->append(buf);
1169    response->append("\r\n");
1170
1171    response->append("Server: Mine/1.0\r\n");
1172
1173    if (cseq >= 0) {
1174        response->append(StringPrintf("CSeq: %d\r\n", cseq));
1175    }
1176
1177    if (playbackSessionID >= 0ll) {
1178        response->append(
1179                StringPrintf(
1180                    "Session: %d;timeout=%lld\r\n",
1181                    playbackSessionID, kPlaybackSessionTimeoutSecs));
1182    }
1183}
1184
1185void WifiDisplaySource::sendErrorResponse(
1186        int32_t sessionID,
1187        const char *errorDetail,
1188        int32_t cseq) {
1189    AString response;
1190    response.append("RTSP/1.0 ");
1191    response.append(errorDetail);
1192    response.append("\r\n");
1193
1194    AppendCommonResponse(&response, cseq);
1195
1196    response.append("\r\n");
1197
1198    status_t err = mNetSession->sendRequest(sessionID, response.c_str());
1199    CHECK_EQ(err, (status_t)OK);
1200}
1201
1202int32_t WifiDisplaySource::makeUniquePlaybackSessionID() const {
1203    return rand();
1204}
1205
1206sp<WifiDisplaySource::PlaybackSession> WifiDisplaySource::findPlaybackSession(
1207        const sp<ParsedMessage> &data, int32_t *playbackSessionID) const {
1208    if (!data->findInt32("session", playbackSessionID)) {
1209        // XXX the older dongles do not always include a "Session:" header.
1210        *playbackSessionID = mClientInfo.mPlaybackSessionID;
1211        return mClientInfo.mPlaybackSession;
1212    }
1213
1214    if (*playbackSessionID != mClientInfo.mPlaybackSessionID) {
1215        return NULL;
1216    }
1217
1218    return mClientInfo.mPlaybackSession;
1219}
1220
1221void WifiDisplaySource::disconnectClient(status_t err) {
1222    if (mClientSessionID != 0) {
1223        if (mClientInfo.mPlaybackSession != NULL) {
1224            looper()->unregisterHandler(mClientInfo.mPlaybackSession->id());
1225            mClientInfo.mPlaybackSession.clear();
1226        }
1227
1228        mNetSession->destroySession(mClientSessionID);
1229        mClientSessionID = 0;
1230    }
1231
1232    if (mClient != NULL) {
1233        if (err != OK) {
1234            mClient->onDisplayError(IRemoteDisplayClient::kDisplayErrorUnknown);
1235        } else {
1236            mClient->onDisplayDisconnected();
1237        }
1238    }
1239}
1240
1241#if REQUIRE_HDCP
1242struct WifiDisplaySource::HDCPObserver : public BnHDCPObserver {
1243    HDCPObserver(const sp<AMessage> &notify);
1244
1245    virtual void notify(
1246            int msg, int ext1, int ext2, const Parcel *obj);
1247
1248private:
1249    sp<AMessage> mNotify;
1250
1251    DISALLOW_EVIL_CONSTRUCTORS(HDCPObserver);
1252};
1253
1254WifiDisplaySource::HDCPObserver::HDCPObserver(
1255        const sp<AMessage> &notify)
1256    : mNotify(notify) {
1257}
1258
1259void WifiDisplaySource::HDCPObserver::notify(
1260        int msg, int ext1, int ext2, const Parcel *obj) {
1261    sp<AMessage> notify = mNotify->dup();
1262    notify->setInt32("msg", msg);
1263    notify->setInt32("ext1", ext1);
1264    notify->setInt32("ext2", ext2);
1265    notify->post();
1266}
1267
1268status_t WifiDisplaySource::makeHDCP() {
1269    sp<IServiceManager> sm = defaultServiceManager();
1270    sp<IBinder> binder = sm->getService(String16("media.player"));
1271    sp<IMediaPlayerService> service = interface_cast<IMediaPlayerService>(binder);
1272    CHECK(service != NULL);
1273
1274    mHDCP = service->makeHDCP();
1275
1276    if (mHDCP == NULL) {
1277        return ERROR_UNSUPPORTED;
1278    }
1279
1280    sp<AMessage> notify = new AMessage(kWhatHDCPNotify, id());
1281    mHDCPObserver = new HDCPObserver(notify);
1282
1283    status_t err = mHDCP->setObserver(mHDCPObserver);
1284
1285    if (err != OK) {
1286        ALOGE("Failed to set HDCP observer.");
1287
1288        mHDCPObserver.clear();
1289        mHDCP.clear();
1290
1291        return err;
1292    }
1293
1294    ALOGI("initiating HDCP negotiation w/ host %s:%d",
1295            mClientInfo.mRemoteIP.c_str(), mHDCPPort);
1296
1297    err = mHDCP->initAsync(mClientInfo.mRemoteIP.c_str(), mHDCPPort);
1298
1299    if (err != OK) {
1300        return err;
1301    }
1302
1303    return OK;
1304}
1305#endif
1306
1307}  // namespace android
1308
1309