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MINOR: quic: define first packet flag

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Received packets treatment has some difference regarding if this is the
first one or not of the encapsulating datagram. Previously, this was set
via a function argument. Simplify this by defining a new Rx packet flag
named QUIC_FL_RX_PACKET_DGRAM_FIRST.

This change does not have functional impact. It will simplify API when
qc_lstnr_pkt_rcv() is broken into several functions : their number of
arguments will be reduced thanks to this patch.

This should be backported up to 2.6.
This commit is contained in:
Amaury Denoyelle 2022-10-19 17:14:28 +02:00
parent 845169da58
commit deb7c87f55
2 changed files with 16 additions and 9 deletions
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2
include/haproxy/quic_conn-t.h
View File

@ -391,6 +391,8 @@ struct quic_dgram {
#define QUIC_MAX_RX_AEPKTS_SINCE_LAST_ACK 2
/* Flag a received packet as being an ack-eliciting packet. */
#define QUIC_FL_RX_PACKET_ACK_ELICITING (1UL << 0)
/* Packet is the first one in the containing datagram. */
#define QUIC_FL_RX_PACKET_DGRAM_FIRST (1UL << 1)
struct quic_rx_packet {
struct list list;

23
src/quic_conn.c
View File

@ -5937,8 +5937,9 @@ static inline int quic_padding_check(const unsigned char *buf,
* bytes in the datagram to entirely consume this latter.
*/
static void qc_lstnr_pkt_rcv(unsigned char *buf, const unsigned char *end,
struct quic_rx_packet *pkt, int first_pkt,
struct quic_dgram *dgram, struct list **tasklist_head)
struct quic_rx_packet *pkt,
struct quic_dgram *dgram,
struct list **tasklist_head)
{
unsigned char *beg;
struct quic_conn *qc;
@ -5970,7 +5971,8 @@ static void qc_lstnr_pkt_rcv(unsigned char *buf, const unsigned char *end,
/* Fixed bit */
if (!(*buf & QUIC_PACKET_FIXED_BIT)) {
if (!first_pkt && quic_padding_check(buf, end)) {
if (!(pkt->flags & QUIC_FL_RX_PACKET_DGRAM_FIRST) &&
quic_padding_check(buf, end)) {
/* Some browsers may pad the remaining datagram space with null bytes.
* That is what we called add padding out of QUIC packets. Such
* datagrams must be considered as valid. But we can only consume
@ -6015,7 +6017,7 @@ static void qc_lstnr_pkt_rcv(unsigned char *buf, const unsigned char *end,
/* When multiple QUIC packets are coalesced on the same UDP datagram,
* they must have the same DCID.
*/
if (!first_pkt &&
if (!(pkt->flags & QUIC_FL_RX_PACKET_DGRAM_FIRST) &&
(pkt->dcid.len != dgram->dcid_len ||
memcmp(dgram->dcid, pkt->dcid.data, pkt->dcid.len))) {
TRACE_PROTO("Packet dropped", QUIC_EV_CONN_LPKT, qc);
@ -6196,7 +6198,7 @@ static void qc_lstnr_pkt_rcv(unsigned char *buf, const unsigned char *end,
/* When multiple QUIC packets are coalesced on the same UDP datagram,
* they must have the same DCID.
*/
if (!first_pkt &&
if (!(pkt->flags & QUIC_FL_RX_PACKET_DGRAM_FIRST) &&
(pkt->dcid.len != dgram->dcid_len ||
memcmp(dgram->dcid, pkt->dcid.data, pkt->dcid.len))) {
TRACE_PROTO("Packet dropped", QUIC_EV_CONN_LPKT, qc);
@ -6240,7 +6242,8 @@ static void qc_lstnr_pkt_rcv(unsigned char *buf, const unsigned char *end,
* This check must be done after the final update to pkt.len to
* properly drop the packet on failure.
*/
if (first_pkt && !quic_peer_validated_addr(qc) &&
if (pkt->flags & QUIC_FL_RX_PACKET_DGRAM_FIRST &&
!quic_peer_validated_addr(qc) &&
qc->flags & QUIC_FL_CONN_ANTI_AMPLIFICATION_REACHED) {
TRACE_PROTO("PTO timer must be armed after anti-amplication was reached",
QUIC_EV_CONN_LPKT, qc, NULL, NULL, qv);
@ -7167,7 +7170,6 @@ struct task *quic_lstnr_dghdlr(struct task *t, void *ctx, unsigned int state)
const unsigned char *end;
struct quic_dghdlr *dghdlr = ctx;
struct quic_dgram *dgram;
int first_pkt = 1;
struct list *tasklist_head = NULL;
int max_dgrams = global.tune.maxpollevents;
@ -7190,11 +7192,14 @@ struct task *quic_lstnr_dghdlr(struct task *t, void *ctx, unsigned int state)
pkt->version = NULL;
pkt->pn_offset = 0;
/* Set flag if pkt is the first one in dgram. */
if (pos == dgram->buf)
pkt->flags |= QUIC_FL_RX_PACKET_DGRAM_FIRST;
LIST_INIT(&pkt->qc_rx_pkt_list);
pkt->time_received = now_ms;
quic_rx_packet_refinc(pkt);
qc_lstnr_pkt_rcv(pos, end, pkt, first_pkt, dgram, &tasklist_head);
first_pkt = 0;
qc_lstnr_pkt_rcv(pos, end, pkt, dgram, &tasklist_head);
pos += pkt->len;
quic_rx_packet_refdec(pkt);