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Fix: select new SCID when current SCID is retired

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This commit is contained in:
Dmitri Tikhonov 2020-06-12 09:50:53 -04:00
parent 583766be5f
commit 432ffd65ae
1 changed files with 21 additions and 0 deletions
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21
src/liblsquic/lsquic_full_conn_ietf.c
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@ -464,6 +464,9 @@ ietf_full_conn_ci_get_log_cid (const struct lsquic_conn *);
static void static void
ietf_full_conn_ci_destroy (struct lsquic_conn *); ietf_full_conn_ci_destroy (struct lsquic_conn *);
static struct conn_cid_elem *
find_cce_by_cid (struct ietf_full_conn *, const lsquic_cid_t *);
static unsigned static unsigned
highest_bit_set (unsigned sz) highest_bit_set (unsigned sz)
{ {
@ -5427,6 +5430,24 @@ process_retire_connection_id_frame (struct ietf_full_conn *conn,
return 0; return 0;
} }
retire_cid(conn, cce, packet_in->pi_received); retire_cid(conn, cce, packet_in->pi_received);
if (lconn->cn_cur_cce_idx == cce - lconn->cn_cces)
{
cce = find_cce_by_cid(conn, &packet_in->pi_dcid);
if (cce)
{
LSQ_DEBUGC("current SCID was retired; set current SCID to "
"%"CID_FMT" based on DCID in incoming packet",
CID_BITS(&packet_in->pi_dcid));
cce->cce_flags |= CCE_USED;
lconn->cn_cur_cce_idx = cce - lconn->cn_cces;
}
else
LSQ_WARN("current SCID was retired; no new SCID candidate");
/* This could theoretically happen when zero-length CIDs were
* used. Currently, there should be no way lsquic could get
* into this situation.
*/
}
} }
else else
LSQ_DEBUG("cannot retire CID seqno=%"PRIu64": not found", seqno); LSQ_DEBUG("cannot retire CID seqno=%"PRIu64": not found", seqno);