The Tor Browser / file comparison
comparison: media/webrtc/signaling/src/mediapipeline/SrtpFlow.h
media/webrtc/signaling/src/mediapipeline/SrtpFlow.h
- branch
- TOR_BUG_9701
- changeset 10
- ac0c01689b40
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| -1:000000000000 | 0:4090f10dab7f |
|---|---|
| 1 /* This Source Code Form is subject to the terms of the Mozilla Public | |
| 2 * License, v. 2.0. If a copy of the MPL was not distributed with this file, | |
| 3 * You can obtain one at http://mozilla.org/MPL/2.0/. */ | |
| 4 | |
| 5 // Original author: ekr@rtfm.com | |
| 6 | |
| 7 #ifndef srtpflow_h__ | |
| 8 #define srtpflow_h__ | |
| 9 | |
| 10 #include "ssl.h" | |
| 11 #include "sslproto.h" | |
| 12 #include "mozilla/RefPtr.h" | |
| 13 #include "nsISupportsImpl.h" | |
| 14 | |
| 15 typedef struct srtp_policy_t srtp_policy_t; | |
| 16 typedef struct srtp_ctx_t *srtp_t; | |
| 17 typedef struct srtp_event_data_t srtp_event_data_t; | |
| 18 | |
| 19 namespace mozilla { | |
| 20 | |
| 21 #define SRTP_MASTER_KEY_LENGTH 16 | |
| 22 #define SRTP_MASTER_SALT_LENGTH 14 | |
| 23 #define SRTP_TOTAL_KEY_LENGTH (SRTP_MASTER_KEY_LENGTH + SRTP_MASTER_SALT_LENGTH) | |
| 24 | |
| 25 // For some reason libsrtp increases packet size by > 12 for RTCP even though | |
| 26 // the doc claims otherwise. | |
| 27 #define SRTP_MAX_EXPANSION 20 | |
| 28 | |
| 29 | |
| 30 class SrtpFlow { | |
| 31 public: | |
| 32 ~SrtpFlow(); | |
| 33 | |
| 34 | |
| 35 static mozilla::RefPtr<SrtpFlow> Create(int cipher_suite, | |
| 36 bool inbound, | |
| 37 const void *key, | |
| 38 size_t key_len); | |
| 39 | |
| 40 nsresult ProtectRtp(void *in, int in_len, | |
| 41 int max_len, int *out_len); | |
| 42 nsresult UnprotectRtp(void *in, int in_len, | |
| 43 int max_len, int *out_len); | |
| 44 nsresult ProtectRtcp(void *in, int in_len, | |
| 45 int max_len, int *out_len); | |
| 46 nsresult UnprotectRtcp(void *in, int in_len, | |
| 47 int max_len, int *out_len); | |
| 48 | |
| 49 NS_INLINE_DECL_THREADSAFE_REFCOUNTING(SrtpFlow) | |
| 50 | |
| 51 static void srtp_event_handler(srtp_event_data_t *data); | |
| 52 | |
| 53 | |
| 54 private: | |
| 55 SrtpFlow() : session_(nullptr) {} | |
| 56 | |
| 57 nsresult CheckInputs(bool protect, void *in, int in_len, | |
| 58 int max_len, int *out_len); | |
| 59 | |
| 60 static nsresult Init(); | |
| 61 static bool initialized; // Was libsrtp initialized? Only happens once. | |
| 62 | |
| 63 srtp_t session_; | |
| 64 }; | |
| 65 | |
| 66 } // End of namespace | |
| 67 #endif | |
| 68 |
