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MINOR: quic-be: Allow sending 1200 bytes Initial datagrams

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This easy to understand patch is not intrusive at all and cannot break the QUIC
listeners.

The QUIC client MUST always pad its datagrams with Initial packets. A "!l" (not
a listener) test OR'ed with the existing ones is added to satisfy the condition
to allow the build of such datagrams.
This commit is contained in:
Frederic Lecaille 2025-06-25 16:04:28 +02:00
parent c898b29e64
commit 8a25fcd36e
1 changed files with 2 additions and 2 deletions
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4
src/quic_tx.c
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@ -679,7 +679,7 @@ static int qc_prep_pkts(struct quic_conn *qc, struct buffer *buf,
* datagrams carrying ack-eliciting Initial packets to at least the
* smallest allowed maximum datagram size of 1200 bytes.
*/
if (qel == qc->iel && (!LIST_ISEMPTY(frms) || probe)) {
if (qel == qc->iel && (!l || !LIST_ISEMPTY(frms) || probe)) {
/* Ensure that no ack-eliciting packets are sent into too small datagrams */
if (end - pos < QUIC_INITIAL_PACKET_MINLEN) {
TRACE_PROTO("No more enough room to build an Initial packet",
@ -704,7 +704,7 @@ static int qc_prep_pkts(struct quic_conn *qc, struct buffer *buf,
*/
cur_pkt = qc_build_pkt(&pos, end, qel, tls_ctx, frms,
qc, ver, dglen, pkt_type, must_ack,
padding && !next_qel && (!probe || !LIST_ISEMPTY(frms)),
padding && (!l || (!next_qel && (!probe || !LIST_ISEMPTY(frms)))),
probe, cc, &err);
if (!cur_pkt) {
switch (err) {