WifiDisplaySource.cpp revision de799a74064a363d26f4c1bbc5a59d1b7127f49f 
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 = 0;
173
174                        mClient->onDisplayError(
175                                IRemoteDisplayClient::kDisplayErrorUnknown);
176                    }
177                    break;
178                }
179
180                case ANetworkSession::kWhatClientConnected:
181                {
182                    int32_t sessionID;
183                    CHECK(msg->findInt32("sessionID", &sessionID));
184
185                    if (mClientSessionID > 0) {
186                        ALOGW("A client tried to connect, but we already "
187                              "have one.");
188
189                        mNetSession->destroySession(sessionID);
190                        break;
191                    }
192
193                    CHECK(msg->findString("client-ip", &mClientInfo.mRemoteIP));
194                    CHECK(msg->findString("server-ip", &mClientInfo.mLocalIP));
195
196                    if (mClientInfo.mRemoteIP == mClientInfo.mLocalIP) {
197                        // Disallow connections from the local interface
198                        // for security reasons.
199                        mNetSession->destroySession(sessionID);
200                        break;
201                    }
202
203                    CHECK(msg->findInt32(
204                                "server-port", &mClientInfo.mLocalPort));
205                    mClientInfo.mPlaybackSessionID = -1;
206
207                    mClientSessionID = sessionID;
208
209                    ALOGI("We now have a client (%d) connected.", sessionID);
210
211                    status_t err = sendM1(sessionID);
212                    CHECK_EQ(err, (status_t)OK);
213                    break;
214                }
215
216                case ANetworkSession::kWhatData:
217                {
218                    status_t err = onReceiveClientData(msg);
219
220                    if (err != OK) {
221                        mClient->onDisplayError(
222                                IRemoteDisplayClient::kDisplayErrorUnknown);
223                    }
224                    break;
225                }
226
227                default:
228                    TRESPASS();
229            }
230            break;
231        }
232
233        case kWhatStop:
234        {
235            CHECK(msg->senderAwaitsResponse(&mStopReplyID));
236
237            if (mClientSessionID != 0
238                    && mClientInfo.mPlaybackSessionID != -1) {
239                status_t err = sendM5(
240                        mClientSessionID, true /* requestShutdown */);
241
242                if (err == OK) {
243                    break;
244                }
245            }
246
247            finishStop();
248            break;
249        }
250
251        case kWhatReapDeadClients:
252        {
253            mReaperPending = false;
254
255            if (mClientSessionID == 0
256                    || mClientInfo.mPlaybackSession == NULL) {
257                break;
258            }
259
260            if (mClientInfo.mPlaybackSession->getLastLifesignUs()
261                    + kPlaybackSessionTimeoutUs < ALooper::GetNowUs()) {
262                ALOGI("playback session timed out, reaping.");
263
264                mNetSession->destroySession(mClientSessionID);
265                mClientSessionID = 0;
266
267                mClient->onDisplayError(
268                        IRemoteDisplayClient::kDisplayErrorUnknown);
269            } else {
270                scheduleReaper();
271            }
272            break;
273        }
274
275        case kWhatPlaybackSessionNotify:
276        {
277            int32_t playbackSessionID;
278            CHECK(msg->findInt32("playbackSessionID", &playbackSessionID));
279
280            int32_t what;
281            CHECK(msg->findInt32("what", &what));
282
283            if (what == PlaybackSession::kWhatSessionDead) {
284                ALOGI("playback session wants to quit.");
285
286                mClient->onDisplayError(
287                        IRemoteDisplayClient::kDisplayErrorUnknown);
288            } else if (what == PlaybackSession::kWhatSessionEstablished) {
289                if (mClient != NULL) {
290                    mClient->onDisplayConnected(
291                            mClientInfo.mPlaybackSession->getSurfaceTexture(),
292                            mClientInfo.mPlaybackSession->width(),
293                            mClientInfo.mPlaybackSession->height(),
294                            0 /* flags */);
295                }
296            } else {
297                CHECK_EQ(what, PlaybackSession::kWhatBinaryData);
298
299                int32_t channel;
300                CHECK(msg->findInt32("channel", &channel));
301
302                sp<ABuffer> data;
303                CHECK(msg->findBuffer("data", &data));
304
305                CHECK_LE(channel, 0xffu);
306                CHECK_LE(data->size(), 0xffffu);
307
308                int32_t sessionID;
309                CHECK(msg->findInt32("sessionID", &sessionID));
310
311                char header[4];
312                header[0] = '$';
313                header[1] = channel;
314                header[2] = data->size() >> 8;
315                header[3] = data->size() & 0xff;
316
317                mNetSession->sendRequest(
318                        sessionID, header, sizeof(header));
319
320                mNetSession->sendRequest(
321                        sessionID, data->data(), data->size());
322            }
323            break;
324        }
325
326        case kWhatKeepAlive:
327        {
328            int32_t sessionID;
329            CHECK(msg->findInt32("sessionID", &sessionID));
330
331            if (mClientSessionID != sessionID) {
332                // Obsolete event, client is already gone.
333                break;
334            }
335
336            sendM16(sessionID);
337            break;
338        }
339
340#if REQUIRE_HDCP
341        case kWhatHDCPNotify:
342        {
343            int32_t msgCode, ext1, ext2;
344            CHECK(msg->findInt32("msg", &msgCode));
345            CHECK(msg->findInt32("ext1", &ext1));
346            CHECK(msg->findInt32("ext2", &ext2));
347
348            ALOGI("Saw HDCP notification code %d, ext1 %d, ext2 %d",
349                    msgCode, ext1, ext2);
350
351            switch (msgCode) {
352                case HDCPModule::HDCP_INITIALIZATION_COMPLETE:
353                {
354                    mHDCPInitializationComplete = true;
355
356                    if (mSetupTriggerDeferred) {
357                        mSetupTriggerDeferred = false;
358
359                        sendM5(mClientSessionID, false /* requestShutdown */);
360                    }
361                    break;
362                }
363
364                case HDCPModule::HDCP_SHUTDOWN_COMPLETE:
365                case HDCPModule::HDCP_SHUTDOWN_FAILED:
366                {
367                    // Ugly hack to make sure that the call to
368                    // HDCPObserver::notify is completely handled before
369                    // we clear the HDCP instance and unload the shared
370                    // library :(
371                    (new AMessage(kWhatFinishStop2, id()))->post(300000ll);
372                    break;
373                }
374
375                default:
376                {
377                    ALOGE("HDCP failure, shutting down.");
378
379                    mClient->onDisplayError(
380                            IRemoteDisplayClient::kDisplayErrorUnknown);
381                    break;
382                }
383            }
384            break;
385        }
386
387        case kWhatFinishStop2:
388        {
389            finishStop2();
390            break;
391        }
392#endif
393
394        default:
395            TRESPASS();
396    }
397}
398
399void WifiDisplaySource::registerResponseHandler(
400        int32_t sessionID, int32_t cseq, HandleRTSPResponseFunc func) {
401    ResponseID id;
402    id.mSessionID = sessionID;
403    id.mCSeq = cseq;
404    mResponseHandlers.add(id, func);
405}
406
407status_t WifiDisplaySource::sendM1(int32_t sessionID) {
408    AString request = "OPTIONS * RTSP/1.0\r\n";
409    AppendCommonResponse(&request, mNextCSeq);
410
411    request.append(
412            "Require: org.wfa.wfd1.0\r\n"
413            "\r\n");
414
415    status_t err =
416        mNetSession->sendRequest(sessionID, request.c_str(), request.size());
417
418    if (err != OK) {
419        return err;
420    }
421
422    registerResponseHandler(
423            sessionID, mNextCSeq, &WifiDisplaySource::onReceiveM1Response);
424
425    ++mNextCSeq;
426
427    return OK;
428}
429
430status_t WifiDisplaySource::sendM3(int32_t sessionID) {
431    AString body =
432#if REQUIRE_HDCP
433        "wfd_content_protection\r\n"
434#endif
435        "wfd_video_formats\r\n"
436        "wfd_audio_codecs\r\n"
437        "wfd_client_rtp_ports\r\n";
438
439    AString request = "GET_PARAMETER rtsp://localhost/wfd1.0 RTSP/1.0\r\n";
440    AppendCommonResponse(&request, mNextCSeq);
441
442    request.append("Content-Type: text/parameters\r\n");
443    request.append(StringPrintf("Content-Length: %d\r\n", body.size()));
444    request.append("\r\n");
445    request.append(body);
446
447    status_t err =
448        mNetSession->sendRequest(sessionID, request.c_str(), request.size());
449
450    if (err != OK) {
451        return err;
452    }
453
454    registerResponseHandler(
455            sessionID, mNextCSeq, &WifiDisplaySource::onReceiveM3Response);
456
457    ++mNextCSeq;
458
459    return OK;
460}
461
462status_t WifiDisplaySource::sendM4(int32_t sessionID) {
463    // wfd_video_formats:
464    // 1 byte "native"
465    // 1 byte "preferred-display-mode-supported" 0 or 1
466    // one or more avc codec structures
467    //   1 byte profile
468    //   1 byte level
469    //   4 byte CEA mask
470    //   4 byte VESA mask
471    //   4 byte HH mask
472    //   1 byte latency
473    //   2 byte min-slice-slice
474    //   2 byte slice-enc-params
475    //   1 byte framerate-control-support
476    //   max-hres (none or 2 byte)
477    //   max-vres (none or 2 byte)
478
479    CHECK_EQ(sessionID, mClientSessionID);
480
481    AString transportString = "UDP";
482
483    char val[PROPERTY_VALUE_MAX];
484    if (property_get("media.wfd.enable-tcp", val, NULL)
485            && (!strcasecmp("true", val) || !strcmp("1", val))) {
486        ALOGI("Using TCP transport.");
487        transportString = "TCP";
488    }
489
490    // For 720p60:
491    //   use "30 00 02 02 00000040 00000000 00000000 00 0000 0000 00 none none\r\n"
492    // For 720p30:
493    //   use "28 00 02 02 00000020 00000000 00000000 00 0000 0000 00 none none\r\n"
494    // For 720p24:
495    //   use "78 00 02 02 00008000 00000000 00000000 00 0000 0000 00 none none\r\n"
496    AString body = StringPrintf(
497        "wfd_video_formats: "
498        "78 00 02 02 00008000 00000000 00000000 00 0000 0000 00 none none\r\n"
499        "wfd_audio_codecs: AAC 00000001 00\r\n"  // 2 ch AAC 48kHz
500        "wfd_presentation_URL: rtsp://%s/wfd1.0/streamid=0 none\r\n"
501        "wfd_client_rtp_ports: RTP/AVP/%s;unicast 19000 0 mode=play\r\n",
502        mClientInfo.mLocalIP.c_str(), transportString.c_str());
503
504    AString request = "SET_PARAMETER rtsp://localhost/wfd1.0 RTSP/1.0\r\n";
505    AppendCommonResponse(&request, mNextCSeq);
506
507    request.append("Content-Type: text/parameters\r\n");
508    request.append(StringPrintf("Content-Length: %d\r\n", body.size()));
509    request.append("\r\n");
510    request.append(body);
511
512    status_t err =
513        mNetSession->sendRequest(sessionID, request.c_str(), request.size());
514
515    if (err != OK) {
516        return err;
517    }
518
519    registerResponseHandler(
520            sessionID, mNextCSeq, &WifiDisplaySource::onReceiveM4Response);
521
522    ++mNextCSeq;
523
524    return OK;
525}
526
527status_t WifiDisplaySource::sendM5(int32_t sessionID, bool requestShutdown) {
528    AString body = "wfd_trigger_method: ";
529    if (requestShutdown) {
530        ALOGI("Sending TEARDOWN trigger.");
531        body.append("TEARDOWN");
532    } else {
533        body.append("SETUP");
534    }
535
536    body.append("\r\n");
537
538    AString request = "SET_PARAMETER rtsp://localhost/wfd1.0 RTSP/1.0\r\n";
539    AppendCommonResponse(&request, mNextCSeq);
540
541    request.append("Content-Type: text/parameters\r\n");
542    request.append(StringPrintf("Content-Length: %d\r\n", body.size()));
543    request.append("\r\n");
544    request.append(body);
545
546    status_t err =
547        mNetSession->sendRequest(sessionID, request.c_str(), request.size());
548
549    if (err != OK) {
550        return err;
551    }
552
553    registerResponseHandler(
554            sessionID, mNextCSeq, &WifiDisplaySource::onReceiveM5Response);
555
556    ++mNextCSeq;
557
558    return OK;
559}
560
561status_t WifiDisplaySource::sendM16(int32_t sessionID) {
562    AString request = "GET_PARAMETER rtsp://localhost/wfd1.0 RTSP/1.0\r\n";
563    AppendCommonResponse(&request, mNextCSeq);
564
565    CHECK_EQ(sessionID, mClientSessionID);
566    request.append(
567            StringPrintf("Session: %d\r\n", mClientInfo.mPlaybackSessionID));
568    request.append("\r\n");  // Empty body
569
570    status_t err =
571        mNetSession->sendRequest(sessionID, request.c_str(), request.size());
572
573    if (err != OK) {
574        return err;
575    }
576
577    registerResponseHandler(
578            sessionID, mNextCSeq, &WifiDisplaySource::onReceiveM16Response);
579
580    ++mNextCSeq;
581
582    return OK;
583}
584
585status_t WifiDisplaySource::onReceiveM1Response(
586        int32_t sessionID, const sp<ParsedMessage> &msg) {
587    int32_t statusCode;
588    if (!msg->getStatusCode(&statusCode)) {
589        return ERROR_MALFORMED;
590    }
591
592    if (statusCode != 200) {
593        return ERROR_UNSUPPORTED;
594    }
595
596    return OK;
597}
598
599status_t WifiDisplaySource::onReceiveM3Response(
600        int32_t sessionID, const sp<ParsedMessage> &msg) {
601    int32_t statusCode;
602    if (!msg->getStatusCode(&statusCode)) {
603        return ERROR_MALFORMED;
604    }
605
606    if (statusCode != 200) {
607        return ERROR_UNSUPPORTED;
608    }
609
610    sp<Parameters> params =
611        Parameters::Parse(msg->getContent(), strlen(msg->getContent()));
612
613    if (params == NULL) {
614        return ERROR_MALFORMED;
615    }
616
617#if REQUIRE_HDCP
618    AString value;
619    if (!params->findParameter("wfd_content_protection", &value)) {
620        ALOGE("Sink doesn't appear to support content protection.");
621        return -EACCES;
622    }
623
624    if (value == "none") {
625        ALOGE("Sink does not support content protection.");
626        return -EACCES;
627    }
628
629    bool isHDCP2_0 = false;
630    if (value.startsWith("HDCP2.0 ")) {
631        isHDCP2_0 = true;
632    } else if (!value.startsWith("HDCP2.1 ")) {
633        return ERROR_MALFORMED;
634    }
635
636    int32_t hdcpPort;
637    if (!ParsedMessage::GetInt32Attribute(value.c_str() + 8, "port", &hdcpPort)
638            || hdcpPort < 1 || hdcpPort > 65535) {
639        return ERROR_MALFORMED;
640    }
641
642    mIsHDCP2_0 = isHDCP2_0;
643    mHDCPPort = hdcpPort;
644
645    status_t err = makeHDCP();
646    if (err != OK) {
647        ALOGE("Unable to instantiate HDCP component.");
648        return err;
649    }
650#endif
651
652    return sendM4(sessionID);
653}
654
655status_t WifiDisplaySource::onReceiveM4Response(
656        int32_t sessionID, const sp<ParsedMessage> &msg) {
657    int32_t statusCode;
658    if (!msg->getStatusCode(&statusCode)) {
659        return ERROR_MALFORMED;
660    }
661
662    if (statusCode != 200) {
663        return ERROR_UNSUPPORTED;
664    }
665
666#if REQUIRE_HDCP
667    if (!mHDCPInitializationComplete) {
668        ALOGI("Deferring SETUP trigger until HDCP initialization completes.");
669
670        mSetupTriggerDeferred = true;
671        return OK;
672    }
673#endif
674
675    return sendM5(sessionID, false /* requestShutdown */);
676}
677
678status_t WifiDisplaySource::onReceiveM5Response(
679        int32_t sessionID, const sp<ParsedMessage> &msg) {
680    int32_t statusCode;
681    if (!msg->getStatusCode(&statusCode)) {
682        return ERROR_MALFORMED;
683    }
684
685    if (statusCode != 200) {
686        return ERROR_UNSUPPORTED;
687    }
688
689    return OK;
690}
691
692status_t WifiDisplaySource::onReceiveM16Response(
693        int32_t sessionID, const sp<ParsedMessage> &msg) {
694    // If only the response was required to include a "Session:" header...
695
696    CHECK_EQ(sessionID, mClientSessionID);
697
698    if (mClientInfo.mPlaybackSession != NULL) {
699        mClientInfo.mPlaybackSession->updateLiveness();
700
701        scheduleKeepAlive(sessionID);
702    }
703
704    return OK;
705}
706
707void WifiDisplaySource::scheduleReaper() {
708    if (mReaperPending) {
709        return;
710    }
711
712    mReaperPending = true;
713    (new AMessage(kWhatReapDeadClients, id()))->post(kReaperIntervalUs);
714}
715
716void WifiDisplaySource::scheduleKeepAlive(int32_t sessionID) {
717    // We need to send updates at least 5 secs before the timeout is set to
718    // expire, make sure the timeout is greater than 5 secs to begin with.
719    CHECK_GT(kPlaybackSessionTimeoutUs, 5000000ll);
720
721    sp<AMessage> msg = new AMessage(kWhatKeepAlive, id());
722    msg->setInt32("sessionID", sessionID);
723    msg->post(kPlaybackSessionTimeoutUs - 5000000ll);
724}
725
726status_t WifiDisplaySource::onReceiveClientData(const sp<AMessage> &msg) {
727    int32_t sessionID;
728    CHECK(msg->findInt32("sessionID", &sessionID));
729
730    sp<RefBase> obj;
731    CHECK(msg->findObject("data", &obj));
732
733    sp<ParsedMessage> data =
734        static_cast<ParsedMessage *>(obj.get());
735
736    ALOGV("session %d received '%s'",
737          sessionID, data->debugString().c_str());
738
739    AString method;
740    AString uri;
741    data->getRequestField(0, &method);
742
743    int32_t cseq;
744    if (!data->findInt32("cseq", &cseq)) {
745        sendErrorResponse(sessionID, "400 Bad Request", -1 /* cseq */);
746        return ERROR_MALFORMED;
747    }
748
749    if (method.startsWith("RTSP/")) {
750        // This is a response.
751
752        ResponseID id;
753        id.mSessionID = sessionID;
754        id.mCSeq = cseq;
755
756        ssize_t index = mResponseHandlers.indexOfKey(id);
757
758        if (index < 0) {
759            ALOGW("Received unsolicited server response, cseq %d", cseq);
760            return ERROR_MALFORMED;
761        }
762
763        HandleRTSPResponseFunc func = mResponseHandlers.valueAt(index);
764        mResponseHandlers.removeItemsAt(index);
765
766        status_t err = (this->*func)(sessionID, data);
767
768        if (err != OK) {
769            ALOGW("Response handler for session %d, cseq %d returned "
770                  "err %d (%s)",
771                  sessionID, cseq, err, strerror(-err));
772
773            return err;
774        }
775
776        return OK;
777    }
778
779    AString version;
780    data->getRequestField(2, &version);
781    if (!(version == AString("RTSP/1.0"))) {
782        sendErrorResponse(sessionID, "505 RTSP Version not supported", cseq);
783        return ERROR_UNSUPPORTED;
784    }
785
786    status_t err;
787    if (method == "OPTIONS") {
788        err = onOptionsRequest(sessionID, cseq, data);
789    } else if (method == "SETUP") {
790        err = onSetupRequest(sessionID, cseq, data);
791    } else if (method == "PLAY") {
792        err = onPlayRequest(sessionID, cseq, data);
793    } else if (method == "PAUSE") {
794        err = onPauseRequest(sessionID, cseq, data);
795    } else if (method == "TEARDOWN") {
796        err = onTeardownRequest(sessionID, cseq, data);
797    } else if (method == "GET_PARAMETER") {
798        err = onGetParameterRequest(sessionID, cseq, data);
799    } else if (method == "SET_PARAMETER") {
800        err = onSetParameterRequest(sessionID, cseq, data);
801    } else {
802        sendErrorResponse(sessionID, "405 Method Not Allowed", cseq);
803
804        err = ERROR_UNSUPPORTED;
805    }
806
807    return err;
808}
809
810status_t WifiDisplaySource::onOptionsRequest(
811        int32_t sessionID,
812        int32_t cseq,
813        const sp<ParsedMessage> &data) {
814    int32_t playbackSessionID;
815    sp<PlaybackSession> playbackSession =
816        findPlaybackSession(data, &playbackSessionID);
817
818    if (playbackSession != NULL) {
819        playbackSession->updateLiveness();
820    }
821
822    AString response = "RTSP/1.0 200 OK\r\n";
823    AppendCommonResponse(&response, cseq);
824
825    response.append(
826            "Public: org.wfa.wfd1.0, SETUP, TEARDOWN, PLAY, PAUSE, "
827            "GET_PARAMETER, SET_PARAMETER\r\n");
828
829    response.append("\r\n");
830
831    status_t err = mNetSession->sendRequest(sessionID, response.c_str());
832
833    if (err == OK) {
834        err = sendM3(sessionID);
835    }
836
837    return err;
838}
839
840status_t WifiDisplaySource::onSetupRequest(
841        int32_t sessionID,
842        int32_t cseq,
843        const sp<ParsedMessage> &data) {
844    CHECK_EQ(sessionID, mClientSessionID);
845    if (mClientInfo.mPlaybackSessionID != -1) {
846        // We only support a single playback session per client.
847        // This is due to the reversed keep-alive design in the wfd specs...
848        sendErrorResponse(sessionID, "400 Bad Request", cseq);
849        return ERROR_MALFORMED;
850    }
851
852    AString transport;
853    if (!data->findString("transport", &transport)) {
854        sendErrorResponse(sessionID, "400 Bad Request", cseq);
855        return ERROR_MALFORMED;
856    }
857
858    PlaybackSession::TransportMode transportMode =
859        PlaybackSession::TRANSPORT_UDP;
860
861    int clientRtp, clientRtcp;
862    if (transport.startsWith("RTP/AVP/TCP;")) {
863        AString interleaved;
864        if (ParsedMessage::GetAttribute(
865                    transport.c_str(), "interleaved", &interleaved)
866                && sscanf(interleaved.c_str(), "%d-%d",
867                          &clientRtp, &clientRtcp) == 2) {
868            transportMode = PlaybackSession::TRANSPORT_TCP_INTERLEAVED;
869        } else {
870            bool badRequest = false;
871
872            AString clientPort;
873            if (!ParsedMessage::GetAttribute(
874                        transport.c_str(), "client_port", &clientPort)) {
875                badRequest = true;
876            } else if (sscanf(clientPort.c_str(), "%d-%d",
877                              &clientRtp, &clientRtcp) == 2) {
878            } else if (sscanf(clientPort.c_str(), "%d", &clientRtp) == 1) {
879                // No RTCP.
880                clientRtcp = -1;
881            } else {
882                badRequest = true;
883            }
884
885            if (badRequest) {
886                sendErrorResponse(sessionID, "400 Bad Request", cseq);
887                return ERROR_MALFORMED;
888            }
889
890            transportMode = PlaybackSession::TRANSPORT_TCP;
891        }
892    } else if (transport.startsWith("RTP/AVP;unicast;")
893            || transport.startsWith("RTP/AVP/UDP;unicast;")) {
894        bool badRequest = false;
895
896        AString clientPort;
897        if (!ParsedMessage::GetAttribute(
898                    transport.c_str(), "client_port", &clientPort)) {
899            badRequest = true;
900        } else if (sscanf(clientPort.c_str(), "%d-%d",
901                          &clientRtp, &clientRtcp) == 2) {
902        } else if (sscanf(clientPort.c_str(), "%d", &clientRtp) == 1) {
903            // No RTCP.
904            clientRtcp = -1;
905        } else {
906            badRequest = true;
907        }
908
909        if (badRequest) {
910            sendErrorResponse(sessionID, "400 Bad Request", cseq);
911            return ERROR_MALFORMED;
912        }
913#if 1
914    // The older LG dongles doesn't specify client_port=xxx apparently.
915    } else if (transport == "RTP/AVP/UDP;unicast") {
916        clientRtp = 19000;
917        clientRtcp = -1;
918#endif
919    } else {
920        sendErrorResponse(sessionID, "461 Unsupported Transport", cseq);
921        return ERROR_UNSUPPORTED;
922    }
923
924    int32_t playbackSessionID = makeUniquePlaybackSessionID();
925
926    sp<AMessage> notify = new AMessage(kWhatPlaybackSessionNotify, id());
927    notify->setInt32("playbackSessionID", playbackSessionID);
928    notify->setInt32("sessionID", sessionID);
929
930    sp<PlaybackSession> playbackSession =
931        new PlaybackSession(
932                mNetSession, notify, mInterfaceAddr,
933#if REQUIRE_HDCP
934                mHDCP
935#else
936                NULL
937#endif
938                );
939
940    looper()->registerHandler(playbackSession);
941
942    AString uri;
943    data->getRequestField(1, &uri);
944
945    if (strncasecmp("rtsp://", uri.c_str(), 7)) {
946        sendErrorResponse(sessionID, "400 Bad Request", cseq);
947        return ERROR_MALFORMED;
948    }
949
950    if (!(uri.startsWith("rtsp://") && uri.endsWith("/wfd1.0/streamid=0"))) {
951        sendErrorResponse(sessionID, "404 Not found", cseq);
952        return ERROR_MALFORMED;
953    }
954
955    status_t err = playbackSession->init(
956            mClientInfo.mRemoteIP.c_str(),
957            clientRtp,
958            clientRtcp,
959            transportMode);
960
961    if (err != OK) {
962        looper()->unregisterHandler(playbackSession->id());
963        playbackSession.clear();
964    }
965
966    switch (err) {
967        case OK:
968            break;
969        case -ENOENT:
970            sendErrorResponse(sessionID, "404 Not Found", cseq);
971            return err;
972        default:
973            sendErrorResponse(sessionID, "403 Forbidden", cseq);
974            return err;
975    }
976
977    mClientInfo.mPlaybackSessionID = playbackSessionID;
978    mClientInfo.mPlaybackSession = playbackSession;
979
980    AString response = "RTSP/1.0 200 OK\r\n";
981    AppendCommonResponse(&response, cseq, playbackSessionID);
982
983    if (transportMode == PlaybackSession::TRANSPORT_TCP_INTERLEAVED) {
984        response.append(
985                StringPrintf(
986                    "Transport: RTP/AVP/TCP;interleaved=%d-%d;",
987                    clientRtp, clientRtcp));
988    } else {
989        int32_t serverRtp = playbackSession->getRTPPort();
990
991        AString transportString = "UDP";
992        if (transportMode == PlaybackSession::TRANSPORT_TCP) {
993            transportString = "TCP";
994        }
995
996        if (clientRtcp >= 0) {
997            response.append(
998                    StringPrintf(
999                        "Transport: RTP/AVP/%s;unicast;client_port=%d-%d;"
1000                        "server_port=%d-%d\r\n",
1001                        transportString.c_str(),
1002                        clientRtp, clientRtcp, serverRtp, serverRtp + 1));
1003        } else {
1004            response.append(
1005                    StringPrintf(
1006                        "Transport: RTP/AVP/%s;unicast;client_port=%d;"
1007                        "server_port=%d\r\n",
1008                        transportString.c_str(),
1009                        clientRtp, serverRtp));
1010        }
1011    }
1012
1013    response.append("\r\n");
1014
1015    err = mNetSession->sendRequest(sessionID, response.c_str());
1016
1017    if (err != OK) {
1018        return err;
1019    }
1020
1021    scheduleReaper();
1022    scheduleKeepAlive(sessionID);
1023
1024    return OK;
1025}
1026
1027status_t WifiDisplaySource::onPlayRequest(
1028        int32_t sessionID,
1029        int32_t cseq,
1030        const sp<ParsedMessage> &data) {
1031    int32_t playbackSessionID;
1032    sp<PlaybackSession> playbackSession =
1033        findPlaybackSession(data, &playbackSessionID);
1034
1035    if (playbackSession == NULL) {
1036        sendErrorResponse(sessionID, "454 Session Not Found", cseq);
1037        return ERROR_MALFORMED;
1038    }
1039
1040    ALOGI("Received PLAY request.");
1041
1042    status_t err = playbackSession->play();
1043    CHECK_EQ(err, (status_t)OK);
1044
1045    AString response = "RTSP/1.0 200 OK\r\n";
1046    AppendCommonResponse(&response, cseq, playbackSessionID);
1047    response.append("Range: npt=now-\r\n");
1048    response.append("\r\n");
1049
1050    err = mNetSession->sendRequest(sessionID, response.c_str());
1051
1052    if (err != OK) {
1053        return err;
1054    }
1055
1056    playbackSession->finishPlay();
1057
1058    return OK;
1059}
1060
1061status_t WifiDisplaySource::onPauseRequest(
1062        int32_t sessionID,
1063        int32_t cseq,
1064        const sp<ParsedMessage> &data) {
1065    int32_t playbackSessionID;
1066    sp<PlaybackSession> playbackSession =
1067        findPlaybackSession(data, &playbackSessionID);
1068
1069    if (playbackSession == NULL) {
1070        sendErrorResponse(sessionID, "454 Session Not Found", cseq);
1071        return ERROR_MALFORMED;
1072    }
1073
1074    status_t err = playbackSession->pause();
1075    CHECK_EQ(err, (status_t)OK);
1076
1077    AString response = "RTSP/1.0 200 OK\r\n";
1078    AppendCommonResponse(&response, cseq, playbackSessionID);
1079    response.append("\r\n");
1080
1081    err = mNetSession->sendRequest(sessionID, response.c_str());
1082
1083    return err;
1084}
1085
1086status_t WifiDisplaySource::onTeardownRequest(
1087        int32_t sessionID,
1088        int32_t cseq,
1089        const sp<ParsedMessage> &data) {
1090    ALOGI("Received TEARDOWN request.");
1091
1092    int32_t playbackSessionID;
1093    sp<PlaybackSession> playbackSession =
1094        findPlaybackSession(data, &playbackSessionID);
1095
1096    if (playbackSession == NULL) {
1097        sendErrorResponse(sessionID, "454 Session Not Found", cseq);
1098        return ERROR_MALFORMED;
1099    }
1100
1101    AString response = "RTSP/1.0 200 OK\r\n";
1102    AppendCommonResponse(&response, cseq, playbackSessionID);
1103    response.append("Connection: close\r\n");
1104    response.append("\r\n");
1105
1106    mNetSession->sendRequest(sessionID, response.c_str());
1107
1108    if (mStopReplyID != 0) {
1109        finishStop();
1110    } else {
1111        mClient->onDisplayError(IRemoteDisplayClient::kDisplayErrorUnknown);
1112    }
1113
1114    return OK;
1115}
1116
1117void WifiDisplaySource::finishStop() {
1118    ALOGV("finishStop");
1119
1120#if REQUIRE_HDCP
1121    if (mHDCP != NULL) {
1122        ALOGI("Initiating HDCP shutdown.");
1123        mHDCP->shutdownAsync();
1124        return;
1125    }
1126#endif
1127
1128    finishStop2();
1129}
1130
1131void WifiDisplaySource::finishStop2() {
1132    ALOGV("finishStop2");
1133
1134#if REQUIRE_HDCP
1135    mHDCP->setObserver(NULL);
1136    mHDCPObserver.clear();
1137    mHDCP.clear();
1138#endif
1139
1140    disconnectClient();
1141
1142    if (mSessionID != 0) {
1143        mNetSession->destroySession(mSessionID);
1144        mSessionID = 0;
1145    }
1146
1147    ALOGV("finishStop2 completed.");
1148
1149    status_t err = OK;
1150
1151    sp<AMessage> response = new AMessage;
1152    response->setInt32("err", err);
1153    response->postReply(mStopReplyID);
1154}
1155
1156status_t WifiDisplaySource::onGetParameterRequest(
1157        int32_t sessionID,
1158        int32_t cseq,
1159        const sp<ParsedMessage> &data) {
1160    int32_t playbackSessionID;
1161    sp<PlaybackSession> playbackSession =
1162        findPlaybackSession(data, &playbackSessionID);
1163
1164    if (playbackSession == NULL) {
1165        sendErrorResponse(sessionID, "454 Session Not Found", cseq);
1166        return ERROR_MALFORMED;
1167    }
1168
1169    playbackSession->updateLiveness();
1170
1171    AString response = "RTSP/1.0 200 OK\r\n";
1172    AppendCommonResponse(&response, cseq, playbackSessionID);
1173    response.append("\r\n");
1174
1175    status_t err = mNetSession->sendRequest(sessionID, response.c_str());
1176    return err;
1177}
1178
1179status_t WifiDisplaySource::onSetParameterRequest(
1180        int32_t sessionID,
1181        int32_t cseq,
1182        const sp<ParsedMessage> &data) {
1183    int32_t playbackSessionID;
1184    sp<PlaybackSession> playbackSession =
1185        findPlaybackSession(data, &playbackSessionID);
1186
1187    if (playbackSession == NULL) {
1188        sendErrorResponse(sessionID, "454 Session Not Found", cseq);
1189        return ERROR_MALFORMED;
1190    }
1191
1192    if (strstr(data->getContent(), "wfd_idr_request\r\n")) {
1193        playbackSession->requestIDRFrame();
1194    }
1195
1196    playbackSession->updateLiveness();
1197
1198    AString response = "RTSP/1.0 200 OK\r\n";
1199    AppendCommonResponse(&response, cseq, playbackSessionID);
1200    response.append("\r\n");
1201
1202    status_t err = mNetSession->sendRequest(sessionID, response.c_str());
1203    return err;
1204}
1205
1206// static
1207void WifiDisplaySource::AppendCommonResponse(
1208        AString *response, int32_t cseq, int32_t playbackSessionID) {
1209    time_t now = time(NULL);
1210    struct tm *now2 = gmtime(&now);
1211    char buf[128];
1212    strftime(buf, sizeof(buf), "%a, %d %b %Y %H:%M:%S %z", now2);
1213
1214    response->append("Date: ");
1215    response->append(buf);
1216    response->append("\r\n");
1217
1218    response->append("Server: Mine/1.0\r\n");
1219
1220    if (cseq >= 0) {
1221        response->append(StringPrintf("CSeq: %d\r\n", cseq));
1222    }
1223
1224    if (playbackSessionID >= 0ll) {
1225        response->append(
1226                StringPrintf(
1227                    "Session: %d;timeout=%lld\r\n",
1228                    playbackSessionID, kPlaybackSessionTimeoutSecs));
1229    }
1230}
1231
1232void WifiDisplaySource::sendErrorResponse(
1233        int32_t sessionID,
1234        const char *errorDetail,
1235        int32_t cseq) {
1236    AString response;
1237    response.append("RTSP/1.0 ");
1238    response.append(errorDetail);
1239    response.append("\r\n");
1240
1241    AppendCommonResponse(&response, cseq);
1242
1243    response.append("\r\n");
1244
1245    mNetSession->sendRequest(sessionID, response.c_str());
1246}
1247
1248int32_t WifiDisplaySource::makeUniquePlaybackSessionID() const {
1249    return rand();
1250}
1251
1252sp<WifiDisplaySource::PlaybackSession> WifiDisplaySource::findPlaybackSession(
1253        const sp<ParsedMessage> &data, int32_t *playbackSessionID) const {
1254    if (!data->findInt32("session", playbackSessionID)) {
1255        // XXX the older dongles do not always include a "Session:" header.
1256        *playbackSessionID = mClientInfo.mPlaybackSessionID;
1257        return mClientInfo.mPlaybackSession;
1258    }
1259
1260    if (*playbackSessionID != mClientInfo.mPlaybackSessionID) {
1261        return NULL;
1262    }
1263
1264    return mClientInfo.mPlaybackSession;
1265}
1266
1267void WifiDisplaySource::disconnectClient() {
1268    if (mClientInfo.mPlaybackSession != NULL) {
1269        sp<PlaybackSession> playbackSession = mClientInfo.mPlaybackSession;
1270        mClientInfo.mPlaybackSession.clear();
1271
1272        ALOGI("Destroying PlaybackSession");
1273        playbackSession->destroy();
1274        looper()->unregisterHandler(playbackSession->id());
1275    }
1276
1277    if (mClientSessionID != 0) {
1278        mNetSession->destroySession(mClientSessionID);
1279        mClientSessionID = 0;
1280    }
1281
1282    mClient->onDisplayDisconnected();
1283}
1284
1285#if REQUIRE_HDCP
1286struct WifiDisplaySource::HDCPObserver : public BnHDCPObserver {
1287    HDCPObserver(const sp<AMessage> &notify);
1288
1289    virtual void notify(
1290            int msg, int ext1, int ext2, const Parcel *obj);
1291
1292private:
1293    sp<AMessage> mNotify;
1294
1295    DISALLOW_EVIL_CONSTRUCTORS(HDCPObserver);
1296};
1297
1298WifiDisplaySource::HDCPObserver::HDCPObserver(
1299        const sp<AMessage> &notify)
1300    : mNotify(notify) {
1301}
1302
1303void WifiDisplaySource::HDCPObserver::notify(
1304        int msg, int ext1, int ext2, const Parcel *obj) {
1305    sp<AMessage> notify = mNotify->dup();
1306    notify->setInt32("msg", msg);
1307    notify->setInt32("ext1", ext1);
1308    notify->setInt32("ext2", ext2);
1309    notify->post();
1310}
1311
1312status_t WifiDisplaySource::makeHDCP() {
1313    sp<IServiceManager> sm = defaultServiceManager();
1314    sp<IBinder> binder = sm->getService(String16("media.player"));
1315    sp<IMediaPlayerService> service = interface_cast<IMediaPlayerService>(binder);
1316    CHECK(service != NULL);
1317
1318    mHDCP = service->makeHDCP();
1319
1320    if (mHDCP == NULL) {
1321        return ERROR_UNSUPPORTED;
1322    }
1323
1324    sp<AMessage> notify = new AMessage(kWhatHDCPNotify, id());
1325    mHDCPObserver = new HDCPObserver(notify);
1326
1327    status_t err = mHDCP->setObserver(mHDCPObserver);
1328
1329    if (err != OK) {
1330        ALOGE("Failed to set HDCP observer.");
1331
1332        mHDCPObserver.clear();
1333        mHDCP.clear();
1334
1335        return err;
1336    }
1337
1338    ALOGI("Initiating HDCP negotiation w/ host %s:%d",
1339            mClientInfo.mRemoteIP.c_str(), mHDCPPort);
1340
1341    err = mHDCP->initAsync(mClientInfo.mRemoteIP.c_str(), mHDCPPort);
1342
1343    if (err != OK) {
1344        return err;
1345    }
1346
1347    return OK;
1348}
1349#endif
1350
1351}  // namespace android
1352
1353