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Don't create an ack frame if one isn't wanted for this pn_space

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The txp->want_ack value has different bit values for different pn_space
values. Make sure we take that into account when we read it.

Fixes #22568

Reviewed-by: Hugo Landau <hlandau@openssl.org>
Reviewed-by: Paul Dale <pauli@openssl.org>
Reviewed-by: Tomas Mraz <tomas@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/22579)
This commit is contained in:
Matt Caswell 2023-10-31 16:24:44 +00:00 committed by Tomas Mraz
parent 3ffc6c644c
commit d13488b936
1 changed files with 1 additions and 1 deletions
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ssl/quic/quic_txp.c
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@ -1786,7 +1786,7 @@ static int txp_generate_pre_token(OSSL_QUIC_TX_PACKETISER *txp,
/* ACK Frames (Regenerate) */
if (a->allow_ack
&& tx_helper_get_space_left(h) >= MIN_FRAME_SIZE_ACK
&& (txp->want_ack
&& (((txp->want_ack & (1UL << pn_space)) != 0)
|| ossl_ackm_is_ack_desired(txp->args.ackm, pn_space))
&& (ack = ossl_ackm_get_ack_frame(txp->args.ackm, pn_space)) != NULL) {
WPACKET *wpkt = tx_helper_begin(h);