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QUIC: attempt decrypt before checking for stateless reset.

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Checking the reset after encryption avoids false positives.  More importantly,
it avoids the check entirely in the usual case where decryption succeeds.

RFC 9000, 10.3.1  Detecting a Stateless Reset

    Endpoints MAY skip this check if any packet from a datagram is
    successfully processed.
This commit is contained in:
Martin Duke 2021-10-12 11:57:50 +03:00
parent 1f523e0d47
commit d3f0dd0321
1 changed files with 5 additions and 2 deletions
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7
src/event/quic/ngx_event_quic.c
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@ -804,8 +804,11 @@ ngx_quic_process_packet(ngx_connection_t *c, ngx_quic_conf_t *conf,
return NGX_DECLINED;
}
} else {
}
rc = ngx_quic_process_payload(c, pkt);
if (rc == NGX_DECLINED && pkt->level == ssl_encryption_application) {
if (ngx_quic_process_stateless_reset(c, pkt) == NGX_OK) {
ngx_log_error(NGX_LOG_INFO, c->log, 0,
"quic stateless reset packet detected");
@ -817,7 +820,7 @@ ngx_quic_process_packet(ngx_connection_t *c, ngx_quic_conf_t *conf,
}
}
return ngx_quic_process_payload(c, pkt);
return rc;
}
/* packet does not belong to a connection */