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Author SHA1 Message Date
uk0 babf6bd0b8 integrate audio ticker, STUN consent, fix timing and STUN ping-pong 
- Launch audio ticker (50pps Opus PT=111) and STUN consent freshness
  as background goroutines in WebRTC mode
- Fix STUN infinite ping-pong: only respond to Binding Requests (0x0001),
  not Binding Responses (0x0101)
- Add decoy send delay (2-8ms) to avoid burst timing fingerprint
- Use shared atomic transport-cc counter across all streams
- WebRTC mode uses compound RTCP (SR+SDES) instead of bare SR
- Server responds to client STUN Binding Requests with proper Response

DPI score: 55.6 -> 73.8 (timing 10->69, size CV 0.09->0.93)
 2026-04-08 16:40:08 +08:00
uk0 8b001daf0a add WebRTC and IPCAM wire formats, encrypt shim header, simulate DTLS 
Security fixes:
- Encrypt shim header inside AES-GCM (eliminates 0x5C10ADED fingerprint)
- XOR magic with session-derived mask when AES disabled
- Unified encode/decode path via wire.go

New wire formats:
- webrtc: SRTP-style 24B RTP header with 0xBEDE extensions (abs-send-time,
  transport-cc), 10B auth tag, compound RTCP SR+SDES, STUN with FINGERPRINT
- ipcam: H.264/RTP surveillance camera simulation with FU-A fragmentation,
  STAP-A SPS/PPS, GOP state machine (I/P frames)

DTLS handshake simulation:
- Fake DTLS 1.2 ClientHello/ServerHello/ChangeCipherSpec/Finished
- Realistic cipher suites, use_srtp extension, supported_groups

DPI score improvement: 34.6 -> 70.4 (webrtc+AES mode)
 2026-04-08 15:55:56 +08:00