fix: dont budget DATA frames that are EOS - #940
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h2@ccf15931c7a28a0fb435612f7d47ed9c5c44dec6
Author: Sean McArthur <sean@seanmonstar.com>
fix: dont budget DATA frames that are EOS
Closes h2#_939
Upstream PR: hyperium/h2#940
Co-authored-by: Sean McArthur <sean@seanmonstar.com>
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Problem HTTP/2 flow control limits DATA payload bytes, but not the framing overhead from excessive numbers of small frames. A peer could fragment data into many tiny frames, causing disproportionate memory usage from queued events while remaining within flow-control windows. Solution Backport the framing overhead budget and empty frame handling from master (hyperium#935, hyperium#940, hyperium#942, hyperium#945, hyperium#946) to the 0.3.x maintenance branch. Validation Ran the full test suite and added regression integration tests in stream_states.rs.
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Closes #939