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cc101cd2aa
This bug arrived with this commit:
b5a8020e9 MINOR: quic: RETIRE_CONNECTION_ID frame handling (RX)
and was revealed by h3 interop tests with clients like s2n-quic and quic-go
as noticed by Amaury.
Indeed, one must check that the CID matching the sequence number provided by a received
RETIRE_CONNECTION_ID frame does not match the DCID of the packet.
Remove useless ->curr_cid_seq_num member from quic_conn struct.
The sequence number lookup must be done in qc_handle_retire_connection_id_frm()
to check the validity of the RETIRE_CONNECTION_ID frame, it returns the CID to be
retired into <cid_to_retire> variable passed as parameter to this function if
the frame is valid and if the CID was not already retired
Must be backported to 2.7.
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