usrsctp_conninput // receives incoming SCTP
DtlsTransport::SendPacket // sends outgoing SCTP
cricket::SctpTransport::SctpTransport // detects when SCTP transport is ready
calculate_crc32c // calculates checksum for SCTP packets
sctp_hmac // performs HMAC to guess secret key
sctp_hmac_m // signs SCTP packet
SrtpTransport::ProtectRtp // suppresses RTP to reduce heap noise
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