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MINOR: quic-be: Do not redispatch the datagrams

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The QUIC datagram redispatch is there to counter the race condition which
exists only for QUIC connections to listener where datagrams may arrive
on the wrong socket between the bind() and connect() calls.
Run this code part only for listeners.
This commit is contained in:
Frederic Lecaille 2024-01-10 11:10:36 +01:00
parent 228b8ec44b
commit fb8c49a7dc
1 changed files with 2 additions and 3 deletions
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5
src/quic_sock.c
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@ -818,14 +818,12 @@ int qc_rcv_buf(struct quic_conn *qc)
struct quic_dgram *new_dgram = NULL;
struct buffer buf = BUF_NULL;
unsigned char *dgram_buf;
struct listener *l;
ssize_t ret = 0;
/* Do not call this if quic-conn FD is uninitialized. */
BUG_ON(qc->fd < 0);
TRACE_ENTER(QUIC_EV_CONN_RCV, qc);
l = qc->li;
do {
if (!b_alloc(&buf, DB_MUX_RX))
@ -871,7 +869,7 @@ int qc_rcv_buf(struct quic_conn *qc)
continue;
}
if (!qc_check_dcid(qc, new_dgram->dcid, new_dgram->dcid_len)) {
if (qc_is_listener(qc) && !qc_check_dcid(qc, new_dgram->dcid, new_dgram->dcid_len)) {
/* Datagram received by error on the connection FD, dispatch it
* to its associated quic-conn.
*
@ -881,6 +879,7 @@ int qc_rcv_buf(struct quic_conn *qc)
struct quic_dgram *tmp_dgram;
unsigned char *rxbuf_tail;
size_t cspace;
struct listener *l = qc->li;
TRACE_STATE("datagram for other connection on quic-conn socket, requeue it", QUIC_EV_CONN_RCV, qc);