Accounting for Retransmissions

Accounting for Retransmissions

• The state variable retran_data is increased when data is retransmitted

• retran_data is decreased when

- Data is SACKed

- snd.fack exceeds snd.nxt at time of retransmission

• In general, then:

awnd = snd.nxt - snd.fack + retran_data

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