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MINOR: quic: Do not accept wrong active_connection_id_limit values

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A peer must not send active_connection_id_limit values smaller than 2
which is also the minimum value when not sent.

Make the transport parameters decoding fail in this case.

Must be backported to 2.7.
This commit is contained in:
Frédéric Lécaille 2023-03-06 13:57:40 +01:00 committed by Amaury Denoyelle
parent ebfafc212a
commit 4afbca611f
1 changed files with 7 additions and 0 deletions
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7
src/quic_tp.c
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@ -609,6 +609,13 @@ static int quic_transport_params_decode(struct quic_transport_params *p, int ser
!p->initial_source_connection_id_present) !p->initial_source_connection_id_present)
return 0; return 0;
/* Note that if not received by the peer, active_connection_id_limit will
* have QUIC_TP_DFLT_ACTIVE_CONNECTION_ID_LIMIT as default value. This
* is also the minimum value for this transport parameter.
*/
if (p->active_connection_id_limit < QUIC_TP_DFLT_ACTIVE_CONNECTION_ID_LIMIT)
return 0;
return 1; return 1;
} }