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Define largest_sent_packet and largest_acked_packet #646

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Jun 21, 2017
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Define largest_sent_packet and largest_acked_packet #646

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11 changes: 10 additions & 1 deletion draft-ietf-quic-recovery.md
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Original file line number Diff line number Diff line change
Expand Up @@ -258,6 +258,12 @@ largest_sent_before_rto:
time_of_last_sent_packet:
: The time the most recent packet was sent.

largest_sent_packet:
: The packet number of the most recently sent packet.

largest_acked_packet:
: The largest packet number acknowledged in an ack frame.

latest_rtt:
: The most recent RTT measurement made when receiving an ack for
a previously unacked packet.
Expand Down Expand Up @@ -309,6 +315,7 @@ follows:
rttvar = 0
largest_sent_before_rto = 0
time_of_last_sent_packet = 0
largest_sent_packet = 0
~~~

### On Sending a Packet
Expand All @@ -331,7 +338,8 @@ Pseudocode for OnPacketSent follows:

~~~
OnPacketSent(packet_number, is_retransmittable, sent_bytes):
time_of_last_sent_packet = now;
time_of_last_sent_packet = now
largest_sent_packet = packet_number
sent_packets[packet_number].packet_number = packet_number
sent_packets[packet_number].time = now
if is_retransmittable:
Expand All @@ -347,6 +355,7 @@ Pseudocode for OnAckReceived and UpdateRtt follow:

~~~
OnAckReceived(ack):
largest_acked_packet = ack.largest_acked
// If the largest acked is newly acked, update the RTT.
if (sent_packets[ack.largest_acked]):
latest_rtt = now - sent_packets[ack.largest_acked].time
Expand Down