Rtmpclient

[mondain]

Fix 1 - Chunk Size Validation in RTMP

• Constants MIN_CHUNK_SIZE=128 and MAX_CHUNK_SIZE=65536 properly defined
• Both setReadChunkSize() and setWriteChunkSize() methods validate bounds
• Throws IllegalArgumentException for invalid sizes

Fix 2 - Type 3 Header Validation in RTMPProtocolDecoder

• Validates previous header exists before inheritance
• Detects suspicious Type 3 usage for new messages
• Proper null check for savedHeader before processing Type 3 headers
• Removes unnecessary XOR bit manipulation
• Reads 32-bit extended timestamps directly from the buffer
• Error logging and null return prevents stream confusion attacks
• Code structure matches expected security pattern

Fix 3 - Extended Timestamp Rollover in RTMPProtocolEncoder

• calculateTimestampDelta() method handles 32-bit timestamp rollover correctly
• RTMPUtils.diffTimestamps deprecated and calls replaced with secure implementation
• Prevents timestamp corruption during 49.7-day rollover periods

[chushiyun2015]

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