Proposed Implementation

TCP-Santa Cruz can be implemented as a TCP option containing the fields depicted in Table 1. The TCP-SC option can vary in size from 11 to 40 bytes, depending on the size of the acknowledgment window (see Section 3.2.2).

 

Table 1: TCP Santa Cruz options field description

Field	Size	Description
	(bytes)
Kind	1	kind of protocol
Data.copy	4 (bits)	retransmission number data packet
ACK.copy	4 (bits)	retransmission number of data packet generating ACK
ACK.sn	4	sequence number of data packet generating ACK
Timestamp	4	arrival time of data packet generating ACK
Bit Vector Granularity	1	number of bytes in each bit
ACK Window	0 - 19	indicates hole in the receive stream