|
1 /* |
|
2 * Copyright (c) 2004 Nokia Corporation and/or its subsidiary(-ies). |
|
3 * All rights reserved. |
|
4 * This component and the accompanying materials are made available |
|
5 * under the terms of "Eclipse Public License v1.0" |
|
6 * which accompanies this distribution, and is available |
|
7 * at the URL "http://www.eclipse.org/legal/epl-v10.html". |
|
8 * |
|
9 * Initial Contributors: |
|
10 * Nokia Corporation - initial contribution. |
|
11 * |
|
12 * Contributors: |
|
13 * |
|
14 * Description: Represents an SRTP stream. |
|
15 * |
|
16 */ |
|
17 |
|
18 |
|
19 |
|
20 |
|
21 // INCLUDES |
|
22 #include "msrtpstreamincontext.h" |
|
23 #include "srtpstreamin.h" |
|
24 #include "tsrtpstreaminstatebase.h" |
|
25 #include "tsrtpstreaminstateuninit.h" |
|
26 #include "tsrtpstreaminstatelatebind.h" |
|
27 #include "tsrtpstreaminstatenormal.h" |
|
28 #include "srtpsession.h" |
|
29 #include "srtpcryptohandler.h" |
|
30 #include "srtpcryptohandlersrtp.h" |
|
31 #include "srtpcryptohandlersrtcp.h" |
|
32 #include "srtputils.h" |
|
33 |
|
34 // --------------------------------------------------------------------------- |
|
35 // Constructor. Used when stream uses default cryptographic context |
|
36 // |
|
37 // --------------------------------------------------------------------------- |
|
38 // |
|
39 EXPORT_C CSRTPStreamIn* CSRTPStreamIn::NewL( CSRTPSession& aSession, |
|
40 TUint aSSRC) |
|
41 { |
|
42 CSRTPStreamIn* self = new( ELeave )CSRTPStreamIn( aSession, aSSRC); |
|
43 CleanupStack::PushL( self ); |
|
44 self->ConstructL(); |
|
45 CleanupStack::Pop( self ); |
|
46 return self; |
|
47 } |
|
48 |
|
49 // --------------------------------------------------------------------------- |
|
50 // Constructor. Used when stream uses its own cryptographic context |
|
51 // |
|
52 // --------------------------------------------------------------------------- |
|
53 // |
|
54 EXPORT_C CSRTPStreamIn* CSRTPStreamIn::NewL( CSRTPSession& aSession, |
|
55 TUint aSSRC, |
|
56 CSRTPCryptoContext* aCon, |
|
57 MSRTPReKeyingObserver& aObs ) |
|
58 { |
|
59 CSRTPStreamIn* self = new( ELeave )CSRTPStreamIn( aSession, aSSRC, |
|
60 aCon, aObs); |
|
61 CleanupStack::PushL( self ); |
|
62 TRAPD( err, self->ConstructL() ); |
|
63 if ( err ) |
|
64 { |
|
65 self->iStrmSpecificCrypto = EFalse; // Cannot take ownership |
|
66 User::Leave( err ); |
|
67 } |
|
68 CleanupStack::Pop( self ); |
|
69 return self; |
|
70 } |
|
71 |
|
72 // --------------------------------------------------------------------------- |
|
73 // Constructor. Used when stream uses default cryptographic context |
|
74 // and "late binding". No SSRC is provided by the user. |
|
75 // |
|
76 // --------------------------------------------------------------------------- |
|
77 // |
|
78 EXPORT_C CSRTPStreamIn* CSRTPStreamIn::NewL( CSRTPSession& aSession) |
|
79 { |
|
80 CSRTPStreamIn* self = new( ELeave )CSRTPStreamIn( aSession); |
|
81 CleanupStack::PushL( self ); |
|
82 self->ConstructL(); |
|
83 CleanupStack::Pop( self ); |
|
84 return self; |
|
85 } |
|
86 |
|
87 // --------------------------------------------------------------------------- |
|
88 // Constructor. Used when stream uses its own cryptographic context |
|
89 // and "late binding". No SSRC is provided by the user. |
|
90 // |
|
91 // --------------------------------------------------------------------------- |
|
92 // |
|
93 EXPORT_C CSRTPStreamIn* CSRTPStreamIn::NewL( CSRTPSession& aSession, |
|
94 CSRTPCryptoContext* aCon, |
|
95 MSRTPReKeyingObserver& aObs ) |
|
96 { |
|
97 CSRTPStreamIn* self = new( ELeave )CSRTPStreamIn( aSession, |
|
98 aCon, aObs); |
|
99 CleanupStack::PushL( self ); |
|
100 TRAPD( err, self->ConstructL() ); |
|
101 if ( err ) |
|
102 { |
|
103 self->iStrmSpecificCrypto = EFalse; // Cannot take ownership |
|
104 User::Leave( err ); |
|
105 } |
|
106 CleanupStack::Pop( self ); |
|
107 return self; |
|
108 } |
|
109 |
|
110 // --------------------------------------------------------------------------- |
|
111 // Constructor. Used when stream uses its own cryptographic context |
|
112 // |
|
113 // --------------------------------------------------------------------------- |
|
114 // |
|
115 EXPORT_C CSRTPStreamIn* CSRTPStreamIn::NewL( CSRTPSession& aSession, |
|
116 TUint aSSRC, |
|
117 MSRTPReKeyingObserver& aObs ) |
|
118 { |
|
119 CSRTPStreamIn* self = new( ELeave )CSRTPStreamIn( aSession, aSSRC,aObs); |
|
120 return self; |
|
121 } |
|
122 |
|
123 // --------------------------------------------------------------------------- |
|
124 // Constructor. Used when stream uses its own cryptographic context |
|
125 // and "late binding". No SSRC is provided by the user. |
|
126 // |
|
127 // --------------------------------------------------------------------------- |
|
128 // |
|
129 EXPORT_C CSRTPStreamIn* CSRTPStreamIn::NewL( CSRTPSession& aSession, |
|
130 MSRTPReKeyingObserver& aObs ) |
|
131 { |
|
132 CSRTPStreamIn* self = new( ELeave )CSRTPStreamIn( aSession, aObs); |
|
133 return self; |
|
134 } |
|
135 // ----------------------------------------------------------------------------- |
|
136 // CSRTPStreamIn::ConstructL |
|
137 // ----------------------------------------------------------------------------- |
|
138 // |
|
139 void CSRTPStreamIn::ConstructL() |
|
140 { |
|
141 CreateCryptoHandlerSRTPL(); |
|
142 CreateCryptoHandlerSRTCPL(); |
|
143 InitializeStatesL(); |
|
144 } |
|
145 |
|
146 // ----------------------------------------------------------------------------- |
|
147 // CSRTPStreamIn::SetCryptoInL() |
|
148 // ----------------------------------------------------------------------------- |
|
149 // |
|
150 EXPORT_C void CSRTPStreamIn::SetCryptoInL(CSRTPCryptoContext* aCon) |
|
151 { |
|
152 //checking if there is one crytpocontext existed |
|
153 //construct only when stream has its own cryto handler |
|
154 if( !aCon) |
|
155 { |
|
156 User::Leave( KErrArgument ); |
|
157 } |
|
158 if (!iRekey ) |
|
159 { |
|
160 delete iHandlerRTP; iHandlerRTP=NULL; |
|
161 delete iHandlerRTCP;iHandlerRTCP=NULL; |
|
162 delete iContext; iContext=NULL; |
|
163 iContext= aCon; |
|
164 iStrmSpecificCrypto= ETrue; |
|
165 iStates.Reset(); |
|
166 |
|
167 //should create handler and initial state |
|
168 TRAPD( err, |
|
169 { |
|
170 CreateCryptoHandlerSRTPL(); |
|
171 CreateCryptoHandlerSRTCPL(); |
|
172 InitializeStatesL(); |
|
173 } ); |
|
174 |
|
175 if ( err ) |
|
176 { |
|
177 iContext = NULL; // Cannot take ownership if leave occurs |
|
178 User::Leave( err ); |
|
179 } |
|
180 |
|
181 if (SSRC()) |
|
182 { |
|
183 ChangeRTPState(MSRTPStreamInContext::ESRTPStreamInUninitialized); |
|
184 ChangeRTCPState(MSRTPStreamInContext::ESRTPStreamInUninitialized); |
|
185 } |
|
186 else |
|
187 { |
|
188 ChangeRTPState(MSRTPStreamInContext::ESRTPStreamInLateBinding); |
|
189 ChangeRTCPState(MSRTPStreamInContext::ESRTPStreamInLateBinding); |
|
190 } |
|
191 } |
|
192 } |
|
193 |
|
194 // --------------------------------------------------------------------------- |
|
195 // CSRTPStreamIn::ReInitialInStates |
|
196 // |
|
197 // --------------------------------------------------------------------------- |
|
198 // |
|
199 void CSRTPStreamIn::UpdateCryptoAndStatesL() |
|
200 { |
|
201 if( !iStrmSpecificCrypto) |
|
202 { |
|
203 UpdateCryptoHandlerL(); |
|
204 iStates.Reset(); |
|
205 InitializeStatesL(); |
|
206 if (SSRC()) |
|
207 { |
|
208 ChangeRTPState(MSRTPStreamInContext::ESRTPStreamInUninitialized); |
|
209 ChangeRTCPState(MSRTPStreamInContext::ESRTPStreamInUninitialized); |
|
210 } |
|
211 else |
|
212 { |
|
213 ChangeRTPState(MSRTPStreamInContext::ESRTPStreamInLateBinding); |
|
214 ChangeRTCPState(MSRTPStreamInContext::ESRTPStreamInLateBinding); |
|
215 } |
|
216 } |
|
217 } |
|
218 // --------------------------------------------------------------------------- |
|
219 // CSRTPStreamIn::CSRTPStreamIn |
|
220 // |
|
221 // --------------------------------------------------------------------------- |
|
222 // |
|
223 CSRTPStreamIn::CSRTPStreamIn( CSRTPSession& aSession, |
|
224 TUint aSSRC) |
|
225 : CSRTPStream(aSession, aSSRC, ETrue), |
|
226 iStates(MSRTPStreamInContext::EMaxStates), |
|
227 iCurrentRTPState(MSRTPStreamInContext::ESRTPStreamInUninitialized), |
|
228 iCurrentRTCPState(MSRTPStreamInContext::ESRTPStreamInUninitialized) |
|
229 |
|
230 { |
|
231 |
|
232 } |
|
233 |
|
234 // --------------------------------------------------------------------------- |
|
235 // CSRTPStreamIn::~CSRTPStreamIn |
|
236 // --------------------------------------------------------------------------- |
|
237 // |
|
238 CSRTPStreamIn::~CSRTPStreamIn( ) |
|
239 { |
|
240 delete iHandlerRTP; |
|
241 delete iHandlerRTCP; |
|
242 if (iStrmSpecificCrypto ) |
|
243 { |
|
244 delete iContext; iContext=NULL; |
|
245 } |
|
246 iStates.Reset(); |
|
247 iHandlerRTP=NULL; |
|
248 iHandlerRTCP=NULL; |
|
249 } |
|
250 // --------------------------------------------------------------------------- |
|
251 // CSRTPStreamIn::CSRTPStreamIn |
|
252 // |
|
253 // --------------------------------------------------------------------------- |
|
254 // |
|
255 CSRTPStreamIn::CSRTPStreamIn( CSRTPSession& aSession, |
|
256 TUint aSSRC, |
|
257 CSRTPCryptoContext* aCon, |
|
258 MSRTPReKeyingObserver& aObs ) |
|
259 : CSRTPStream(aSession, aSSRC, aCon, aObs, ETrue), |
|
260 iStates(MSRTPStreamInContext::EMaxStates), |
|
261 iCurrentRTPState(MSRTPStreamInContext::ESRTPStreamInUninitialized), |
|
262 iCurrentRTCPState(MSRTPStreamInContext::ESRTPStreamInUninitialized) |
|
263 |
|
264 { |
|
265 |
|
266 } |
|
267 |
|
268 // --------------------------------------------------------------------------- |
|
269 // CSRTPStreamIn::CSRTPStreamIn |
|
270 // |
|
271 // --------------------------------------------------------------------------- |
|
272 // |
|
273 CSRTPStreamIn::CSRTPStreamIn( CSRTPSession& aSession, |
|
274 TUint aSSRC, |
|
275 MSRTPReKeyingObserver& aObs ) |
|
276 : CSRTPStream(aSession, aSSRC, aObs, ETrue), |
|
277 iStates(MSRTPStreamInContext::EMaxStates), |
|
278 iCurrentRTPState(MSRTPStreamInContext::ESRTPStreamInUninitialized), |
|
279 iCurrentRTCPState(MSRTPStreamInContext::ESRTPStreamInUninitialized) |
|
280 |
|
281 { |
|
282 |
|
283 } |
|
284 |
|
285 // --------------------------------------------------------------------------- |
|
286 // CSRTPStreamIn::CSRTPStreamIn |
|
287 // |
|
288 // --------------------------------------------------------------------------- |
|
289 // |
|
290 CSRTPStreamIn::CSRTPStreamIn( CSRTPSession& aSession) |
|
291 : CSRTPStream(aSession, ETrue), |
|
292 iStates(MSRTPStreamInContext::EMaxStates), |
|
293 iCurrentRTPState(MSRTPStreamInContext::ESRTPStreamInLateBinding), |
|
294 iCurrentRTCPState(MSRTPStreamInContext::ESRTPStreamInLateBinding) |
|
295 |
|
296 { |
|
297 |
|
298 } |
|
299 |
|
300 // --------------------------------------------------------------------------- |
|
301 // CSRTPStreamIn::CSRTPStreamIn |
|
302 // |
|
303 // --------------------------------------------------------------------------- |
|
304 // |
|
305 CSRTPStreamIn::CSRTPStreamIn( CSRTPSession& aSession, |
|
306 CSRTPCryptoContext* aCon, |
|
307 MSRTPReKeyingObserver& aObs ) |
|
308 : CSRTPStream(aSession, aCon, aObs, ETrue), |
|
309 iStates(MSRTPStreamInContext::EMaxStates), |
|
310 iCurrentRTPState(MSRTPStreamInContext::ESRTPStreamInLateBinding), |
|
311 iCurrentRTCPState(MSRTPStreamInContext::ESRTPStreamInLateBinding) |
|
312 |
|
313 { |
|
314 |
|
315 } |
|
316 |
|
317 // --------------------------------------------------------------------------- |
|
318 // CSRTPStreamIn::CSRTPStreamIn |
|
319 // |
|
320 // --------------------------------------------------------------------------- |
|
321 // |
|
322 CSRTPStreamIn::CSRTPStreamIn( CSRTPSession& aSession, |
|
323 MSRTPReKeyingObserver& aObs ) |
|
324 : CSRTPStream(aSession, aObs, ETrue), |
|
325 iStates(MSRTPStreamInContext::EMaxStates), |
|
326 iCurrentRTPState(MSRTPStreamInContext::ESRTPStreamInLateBinding), |
|
327 iCurrentRTCPState(MSRTPStreamInContext::ESRTPStreamInLateBinding) |
|
328 |
|
329 { |
|
330 |
|
331 } |
|
332 |
|
333 |
|
334 // --------------------------------------------------------------------------- |
|
335 // HBufC8* CSRTPStreamIn::UnprotectSrtpL() |
|
336 // |
|
337 // --------------------------------------------------------------------------- |
|
338 // |
|
339 EXPORT_C HBufC8* CSRTPStreamIn::UnprotectSrtpL( const TDesC8& aPacket ) |
|
340 { |
|
341 SRTP_DEBUG_DETAIL( "CSRTPStreamIn::UnprotectSrtpL Entry" ); |
|
342 |
|
343 if ( IsContextSet() ) |
|
344 { |
|
345 SRTP_DEBUG_DETAIL( "CSRTPStreamIn::UnprotectSrtpL Exit" ); |
|
346 return (CurrentRTPState().DoUnprotectSrtpL(aPacket) ); |
|
347 } |
|
348 SRTP_DEBUG_DETAIL( "CSRTPStreamIn::UnprotectSrtpL Exit" ); |
|
349 |
|
350 User::Leave (KErrArgument); |
|
351 return NULL; |
|
352 } |
|
353 |
|
354 // --------------------------------------------------------------------------- |
|
355 // HBufC8* CSRTPStreamIn::UnprotectSrtcpL() |
|
356 // |
|
357 // --------------------------------------------------------------------------- |
|
358 // |
|
359 EXPORT_C HBufC8* CSRTPStreamIn::UnprotectSrtcpL( const TDesC8& aPacket ) |
|
360 { |
|
361 if (IsContextSet()) |
|
362 return (CurrentRTCPState().DoUnprotectSrtcpL(aPacket)); |
|
363 User::Leave (KErrArgument); |
|
364 return NULL; |
|
365 } |
|
366 |
|
367 |
|
368 // ----------------------------------------------------------------------------- |
|
369 // CSRTPStreamIn::InitializeStatesL |
|
370 // ----------------------------------------------------------------------------- |
|
371 // |
|
372 void CSRTPStreamIn::InitializeStatesL() |
|
373 { |
|
374 iStates.AppendL(TSRTPStreamInStateUninit(*this, *iHandlerRTP, *iHandlerRTCP), |
|
375 sizeof(TSRTPStreamInStateUninit)); |
|
376 iStates.AppendL(TSRTPStreamInStateLateBind(*this, *iHandlerRTP, *iHandlerRTCP), |
|
377 sizeof(TSRTPStreamInStateLateBind)); |
|
378 iStates.AppendL(TSRTPStreamInStateNormal(*this, *iHandlerRTP, *iHandlerRTCP), |
|
379 sizeof(TSRTPStreamInStateNormal)); |
|
380 } |
|
381 |
|
382 // ----------------------------------------------------------------------------- |
|
383 // CSRTPStreamIn::ChangeRTPState |
|
384 // ----------------------------------------------------------------------------- |
|
385 // |
|
386 void CSRTPStreamIn::ChangeRTPState(MSRTPStreamInContext::TContextInState aNewState) |
|
387 { |
|
388 SRTP_DEBUG_TINT_VALUE( "CSRTPStreamIn::ChangeRTPState", aNewState); |
|
389 |
|
390 iCurrentRTPState = aNewState; |
|
391 } |
|
392 |
|
393 // ----------------------------------------------------------------------------- |
|
394 // CSRTPStreamIn::ChangeRTCPState |
|
395 // ----------------------------------------------------------------------------- |
|
396 // |
|
397 void CSRTPStreamIn::ChangeRTCPState(MSRTPStreamInContext::TContextInState aNewState) |
|
398 { |
|
399 iCurrentRTCPState = aNewState; |
|
400 } |
|
401 |
|
402 // ---------------------------------------------------------------------------- |
|
403 // CSRTPStreamIn::CurrentRTPState |
|
404 // ---------------------------------------------------------------------------- |
|
405 // |
|
406 TSRTPStreamInStateBase& CSRTPStreamIn::CurrentRTPState() |
|
407 { |
|
408 SRTP_DEBUG_TINT_VALUE( "CSRTPStreamIN::CurrentRTPState()", iCurrentRTPState); |
|
409 SRTP_DEBUG_TINT_VALUE( "CSRTPStreamIN::RTP State Count", iStates.Count() ); |
|
410 |
|
411 return iStates.At(iCurrentRTPState); |
|
412 } |
|
413 |
|
414 // ---------------------------------------------------------------------------- |
|
415 // CSRTPStreamIn::CurrentRTCPState |
|
416 // ---------------------------------------------------------------------------- |
|
417 // |
|
418 TSRTPStreamInStateBase& CSRTPStreamIn::CurrentRTCPState() |
|
419 { |
|
420 SRTP_DEBUG_TINT_VALUE( "CSRTPStreamIN::CurrentRTCPState()", iCurrentRTPState ); |
|
421 SRTP_DEBUG_TINT_VALUE( "CSRTPStreamIN::RTCP State Count", iStates.Count() ); |
|
422 |
|
423 return iStates.At(iCurrentRTCPState); |
|
424 } |
|
425 |