Transport Layer - Freie Universität Berlin

SCTP Common Header
● Ports
● 16 bit as used in TCP, UDP
● Verification Tag
● Validation of the sender, set to the value of the Initiate Tag received from the
peer during association initialization
● Set to 0 in packets with INIT chunk
● See RFC for use during SHUTDOWN and ABORT
● Checksum
● CRC32c checksum algorithm using the polynomial x 32 +x 28 +x 27 +x 26 +x 25
+x 23 +x 22 +x 20 +x 19 +x 18 +x 14 +x 13 +x 11 +x 10 +x 9 +x 8 +x 6 +1
● Calculated over the whole SCTP packet including common header (with
checksum initialized to 0) and all chunks
● Invalid packets are typically silently discarded
Univ.-Prof. Dr.-Ing. Jochen H. Schiller ▪ cst.mi.fu-berlin.de ▪ Telematics ▪ Chapter 8: Transport Layer
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