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First pass at 7, 14, and 30-bit varint packet numbers #1334

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merged 9 commits into from May 8, 2018
Merged

First pass at 7, 14, and 30-bit varint packet numbers #1334

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b3bb463
First pass at varint packet numbers
britram May 3, 2018
fae6da8
tweaks, thanks Martin and Ian
britram May 4, 2018
50f0501
long headers too
britram May 5, 2018
4f8bb35
Both long and short have varint PN
martinthomson May 7, 2018
8d49212
Merge pull request #1 from quicwg/long-and-short-varint-pn
britram May 7, 2018
3335dd5
Update examples for shorter encodings
martinthomson May 7, 2018
60811b2
Merge pull request #2 from quicwg/fix-pn-example
britram May 7, 2018
7b22bf0
Update table caption
martinthomson May 8, 2018
7fcd5a7
indent
janaiyengar May 8, 2018
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8 changes: 4 additions & 4 deletions draft-ietf-quic-transport.md
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Expand Up @@ -802,7 +802,7 @@ Once packet number protection is removed, the packet number is decoded by
finding the packet number value that is closest to the next expected packet.
The next expected packet is the highest received packet number plus one. For
example, if the highest successfully authenticated packet had a packet number of
0xaa82f30e, then a packet containing a 16-bit value of 0x1f94 will be decoded as
0xaa82f30e, then a packet containing a 14-bit value of 0x1f94 will be decoded as
0xaa831f94.

The sender MUST use a packet number size able to represent more than twice as
Expand All @@ -818,9 +818,9 @@ the base 2 logarithm of the number of contiguous unacknowledged packet numbers,
including the new packet.

For example, if an endpoint has received an acknowledgment for packet 0x6afa2f,
sending a packet with a number of 0x6b4264 requires a 16-bit or larger packet
number encoding; whereas a 32-bit packet number is needed to send a packet with
a number of 0x6bc107.
sending a packet with a number of 0x6b2d79 requires a packet number encoding
with 14 bits or more; whereas the 30-bit packet number encoding is needed to
send a packet with a number of 0x6bc107.

A Version Negotiation packet ({{packet-version}}) does not include a packet
number. The Retry packet ({{packet-retry}}) has special rules for populating
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