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c8127df04c
SSL_poll indicates that a stream which has had the fin bit set on it, should generate SSL_POLL_EVENT_R events, so that applications can detect stream completion via SSL_read_ex and SSL_get_error returning SSL_ERROR_ZERO_RETURN. However, the quic polling code misses on this, as a client that completely reads a buffer after receipt has its underlying stream buffer freed, loosing the fin status We can however detect stream completion still, as a stream which has been finalized, and had all its data read will be in the QUIC_RSTREAM_STATE_DATA_READ state, iff the fin bit was set. Fix it by checking in test_poll_event_r for that state, and generating a SSL_POLL_EVENT_R if its found to be true, so as to stay in line with the docs. Fixes openssl/private#627 Reviewed-by: Tomas Mraz <tomas@openssl.org> Reviewed-by: Sasa Nedvedicky <sashan@openssl.org> (Merged from https://github.com/openssl/openssl/pull/25399)