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Update Stream Receive Buffers design document with implementation details

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Reviewed-by: Matt Caswell <matt@openssl.org>
Reviewed-by: Hugo Landau <hlandau@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/19351)
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Tomas Mraz 2022-11-10 17:13:36 +01:00 committed by Hugo Landau
parent a17c713a7a
commit 6f3072212c
1 changed files with 15 additions and 1 deletions
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doc/designs/quic-design/stream-receive-buffers.md
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@ -96,7 +96,21 @@ below. Details TBD.
Implementation details
----------------------
TBD
The QUIC_RSTREAM object holds the received stream data in the SFRAME_LIST
structure. This is a sorted list of partially (never fully) overlapping
data frames. Each list item holds a pointer to the received packet
wrapper for refcounting and proper release of the received packet
data once the stream data is read by the application.
Each SFRAME_LIST item has range.start and range.end values greater
than the range.start and range.end values of the previous item in the list.
This invariant is ensured on the insertion of overlapping stream frames.
Any redundant frames are released. Insertion at the end of the list
is optimised as in the ideal situation when no packets are lost we
always just append new frames.
See `include/internal/quic_stream.h` and `include/internal/quic_sf_list.h`
for internal API details.
Other considerations
--------------------