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git01.mediatek.com / haproxy / 6d19f0d837ce66f307bd3d5aa505bd9e068b4d4e / . / src / quic_frame.c
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/*
* Copyright 2019 HAProxy Technologies, Frédéric Lécaille <flecaille@haproxy.com>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
*/
#include <import/eb64tree.h>
#include <haproxy/quic_frame.h>
#include <haproxy/trace.h>
#include <haproxy/xprt_quic.h>
#define TRACE_SOURCE &trace_quic
const char *quic_frame_type_string(enum quic_frame_type ft)
{
switch (ft) {
case QUIC_FT_PADDING:
return "PADDING";
case QUIC_FT_PING:
return "PING";
case QUIC_FT_ACK:
return "ACK";
case QUIC_FT_ACK_ECN:
return "ACK_ENC";
case QUIC_FT_RESET_STREAM:
return "RESET_STREAM";
case QUIC_FT_STOP_SENDING:
return "STOP_SENDING";
case QUIC_FT_CRYPTO:
return "CRYPTO";
case QUIC_FT_NEW_TOKEN:
return "NEW_TOKEN";
case QUIC_FT_STREAM_8:
return "STREAM_8";
case QUIC_FT_STREAM_9:
return "STREAM_9";
case QUIC_FT_STREAM_A:
return "STREAM_A";
case QUIC_FT_STREAM_B:
return "STREAM_B";
case QUIC_FT_STREAM_C:
return "STREAM_C";
case QUIC_FT_STREAM_D:
return "STREAM_D";
case QUIC_FT_STREAM_E:
return "STREAM_E";
case QUIC_FT_STREAM_F:
return "STREAM_F";
case QUIC_FT_MAX_DATA:
return "MAX_DATA";
case QUIC_FT_MAX_STREAM_DATA:
return "MAX_STREAM_DATA";
case QUIC_FT_MAX_STREAMS_BIDI:
return "MAX_STREAMS_BIDI";
case QUIC_FT_MAX_STREAMS_UNI:
return "MAX_STREAMS_UNI";
case QUIC_FT_DATA_BLOCKED:
return "DATA_BLOCKED";
case QUIC_FT_STREAM_DATA_BLOCKED:
return "STREAM_DATA_BLOCKED";
case QUIC_FT_STREAMS_BLOCKED_BIDI:
return "STREAMS_BLOCKED_BIDI";
case QUIC_FT_STREAMS_BLOCKED_UNI:
return "STREAMS_BLOCKED_UNI";
case QUIC_FT_NEW_CONNECTION_ID:
return "NEW_CONNECTION_ID";
case QUIC_FT_RETIRE_CONNECTION_ID:
return "RETIRE_CONNECTION_ID";
case QUIC_FT_PATH_CHALLENGE:
return "PATH_CHALLENGE";
case QUIC_FT_PATH_RESPONSE:
return "PATH_RESPONSE";
case QUIC_FT_CONNECTION_CLOSE:
return "CONNECTION_CLOSE";
case QUIC_FT_CONNECTION_CLOSE_APP:
return "CONNECTION_CLOSE_APP";
case QUIC_FT_HANDSHAKE_DONE:
return "HANDSHAKE_DONE";
default:
return "UNKNOWN";
}
}
/* Encode <frm> PADDING frame into <buf> buffer.
* Returns 1 if succeeded (enough room in <buf> to encode the frame), 0 if not.
*/
static int quic_build_padding_frame(unsigned char **buf, const unsigned char *end,
struct quic_frame *frm, struct quic_conn *conn)
{
struct quic_padding *padding = &frm->padding;
if (end - *buf < padding->len - 1)
return 0;
memset(*buf, 0, padding->len - 1);
*buf += padding->len - 1;
return 1;
}
/* Parse a PADDING frame from <buf> buffer with <end> as end into <frm> frame.
* Return 1 if succeeded (enough room to parse this frame), 0 if not.
*/
static int quic_parse_padding_frame(struct quic_frame *frm, struct quic_conn *qc,
const unsigned char **buf, const unsigned char *end)
{
const unsigned char *beg;
struct quic_padding *padding = &frm->padding;
beg = *buf;
padding->len = 1;
while (*buf < end && !**buf)
(*buf)++;
padding->len += *buf - beg;
return 1;
}
/* Encode a ACK frame into <buf> buffer.
* Always succeeds.
*/
static int quic_build_ping_frame(unsigned char **buf, const unsigned char *end,
struct quic_frame *frm, struct quic_conn *conn)
{
/* No field */
return 1;
}
/* Parse a PADDING frame from <buf> buffer with <end> as end into <frm> frame.
* Always succeeds.
*/
static int quic_parse_ping_frame(struct quic_frame *frm, struct quic_conn *qc,
const unsigned char **buf, const unsigned char *end)
{
/* No field */
return 1;
}
/* Encode a ACK frame.
* Returns 1 if succeeded (enough room in <buf> to encode the frame), 0 if not.
*/
static int quic_build_ack_frame(unsigned char **buf, const unsigned char *end,
struct quic_frame *frm, struct quic_conn *conn)
{
struct quic_tx_ack *tx_ack = &frm->tx_ack;
struct eb64_node *ar, *prev_ar;
struct quic_arng_node *ar_node, *prev_ar_node;
ar = eb64_last(&tx_ack->arngs->root);
ar_node = eb64_entry(&ar->node, struct quic_arng_node, first);
TRACE_PROTO("ack range", QUIC_EV_CONN_PRSAFRM,
conn->conn,, &ar_node->last, &ar_node->first.key);
if (!quic_enc_int(buf, end, ar_node->last) ||
!quic_enc_int(buf, end, tx_ack->ack_delay) ||
!quic_enc_int(buf, end, tx_ack->arngs->sz - 1) ||
!quic_enc_int(buf, end, ar_node->last - ar_node->first.key))
return 0;
while ((prev_ar = eb64_prev(ar))) {
prev_ar_node = eb64_entry(&prev_ar->node, struct quic_arng_node, first);
TRACE_PROTO("ack range", QUIC_EV_CONN_PRSAFRM, conn->conn,,
&prev_ar_node->last, &prev_ar_node->first.key);
if (!quic_enc_int(buf, end, ar_node->first.key - prev_ar_node->last - 2) ||
!quic_enc_int(buf, end, prev_ar_node->last - prev_ar_node->first.key))
return 0;
ar = prev_ar;
ar_node = eb64_entry(&ar->node, struct quic_arng_node, first);
}
return 1;
}
/* Parse an ACK frame header from <buf> buffer with <end> as end into <frm> frame.
* Return 1 if succeeded (enough room to parse this frame), 0 if not.
*/
static int quic_parse_ack_frame_header(struct quic_frame *frm, struct quic_conn *qc,
const unsigned char **buf, const unsigned char *end)
{
int ret;
struct quic_ack *ack = &frm->ack;
ret = quic_dec_int(&ack->largest_ack, buf, end);
if (!ret)
return 0;
ret = quic_dec_int(&ack->ack_delay, buf, end);
if (!ret)
return 0;
ret = quic_dec_int(&ack->ack_range_num, buf, end);
if (!ret)
return 0;
ret = quic_dec_int(&ack->first_ack_range, buf, end);
if (!ret)
return 0;
return 1;
}
/* Encode a ACK_ECN frame.
* Returns 1 if succeeded (enough room in <buf> to encode the frame), 0 if not.
*/
static int quic_build_ack_ecn_frame(unsigned char **buf, const unsigned char *end,
struct quic_frame *frm, struct quic_conn *conn)
{
struct quic_ack *ack = &frm->ack;
return quic_enc_int(buf, end, ack->largest_ack) &&
quic_enc_int(buf, end, ack->ack_delay) &&
quic_enc_int(buf, end, ack->first_ack_range) &&
quic_enc_int(buf, end, ack->ack_range_num);
}
/* Parse an ACK_ECN frame from <buf> buffer with <end> as end into <frm> frame.
* Return 1 if succeeded (enough room to parse this frame), 0 if not.
*/
static int quic_parse_ack_ecn_frame(struct quic_frame *frm, struct quic_conn *qc,
const unsigned char **buf, const unsigned char *end)
{
struct quic_ack *ack = &frm->ack;
return quic_dec_int(&ack->largest_ack, buf, end) &&
quic_dec_int(&ack->ack_delay, buf, end) &&
quic_dec_int(&ack->first_ack_range, buf, end) &&
quic_dec_int(&ack->ack_range_num, buf, end);
}
/* Encode a RESET_STREAM frame into <buf> buffer.
* Returns 1 if succeeded (enough room in <buf> to encode the frame), 0 if not.
*/
static int quic_build_reset_stream_frame(unsigned char **buf, const unsigned char *end,
struct quic_frame *frm, struct quic_conn *conn)
{
struct quic_reset_stream *reset_stream = &frm->reset_stream;
return quic_enc_int(buf, end, reset_stream->id) &&
quic_enc_int(buf, end, reset_stream->app_error_code) &&
quic_enc_int(buf, end, reset_stream->final_size);
}
/* Parse a RESET_STREAM frame from <buf> buffer with <end> as end into <frm> frame.
* Return 1 if succeeded (enough room to parse this frame), 0 if not.
*/
static int quic_parse_reset_stream_frame(struct quic_frame *frm, struct quic_conn *qc,
const unsigned char **buf, const unsigned char *end)
{
struct quic_reset_stream *reset_stream = &frm->reset_stream;
return quic_dec_int(&reset_stream->id, buf, end) &&
quic_dec_int(&reset_stream->app_error_code, buf, end) &&
quic_dec_int(&reset_stream->final_size, buf, end);
}
/* Encode a STOP_SENDING frame.
* Returns 1 if succeeded (enough room in <buf> to encode the frame), 0 if not.
*/
static int quic_build_stop_sending_frame(unsigned char **buf, const unsigned char *end,
struct quic_frame *frm, struct quic_conn *conn)
{
struct quic_stop_sending_frame *stop_sending_frame = &frm->stop_sending_frame;
return quic_enc_int(buf, end, stop_sending_frame->id) &&
quic_enc_int(buf, end, stop_sending_frame->app_error_code);
}
/* Parse a STOP_SENDING frame from <buf> buffer with <end> as end into <frm> frame.
* Return 1 if succeeded (enough room to parse this frame), 0 if not.
*/
static int quic_parse_stop_sending_frame(struct quic_frame *frm, struct quic_conn *qc,
const unsigned char **buf, const unsigned char *end)
{
struct quic_stop_sending_frame *stop_sending_frame = &frm->stop_sending_frame;
return quic_dec_int(&stop_sending_frame->id, buf, end) &&
quic_dec_int(&stop_sending_frame->app_error_code, buf, end);
}
/* Encode a CRYPTO frame into <buf> buffer.
* Returns 1 if succeeded (enough room in <buf> to encode the frame), 0 if not.
*/
static int quic_build_crypto_frame(unsigned char **buf, const unsigned char *end,
struct quic_frame *frm, struct quic_conn *conn)
{
struct quic_crypto *crypto = &frm->crypto;
const struct quic_enc_level *qel = crypto->qel;
size_t offset, len;
if (!quic_enc_int(buf, end, crypto->offset) ||
!quic_enc_int(buf, end, crypto->len) || end - *buf < crypto->len)
return 0;
len = crypto->len;
offset = crypto->offset;
while (len) {
int idx;
size_t to_copy;
const unsigned char *data;
idx = offset >> QUIC_CRYPTO_BUF_SHIFT;
to_copy = qel->tx.crypto.bufs[idx]->sz - (offset & QUIC_CRYPTO_BUF_MASK);
if (to_copy > len)
to_copy = len;
data = qel->tx.crypto.bufs[idx]->data + (offset & QUIC_CRYPTO_BUF_MASK);
memcpy(*buf, data, to_copy);
*buf += to_copy;
offset += to_copy;
len -= to_copy;
}
return 1;
}
/* Parse a CRYPTO frame from <buf> buffer with <end> as end into <frm> frame.
* Return 1 if succeeded (enough room to parse this frame), 0 if not.
*/
static int quic_parse_crypto_frame(struct quic_frame *frm, struct quic_conn *qc,
const unsigned char **buf, const unsigned char *end)
{
struct quic_crypto *crypto = &frm->crypto;
if (!quic_dec_int(&crypto->offset, buf, end) ||
!quic_dec_int(&crypto->len, buf, end) || end - *buf < crypto->len)
return 0;
crypto->data = *buf;
*buf += crypto->len;
return 1;
}
/* Encode a NEW_TOKEN frame into <buf> buffer.
* Returns 1 if succeeded (enough room in <buf> to encode the frame), 0 if not.
*/
static int quic_build_new_token_frame(unsigned char **buf, const unsigned char *end,
struct quic_frame *frm, struct quic_conn *conn)
{
struct quic_new_token *new_token = &frm->new_token;
if (!quic_enc_int(buf, end, new_token->len) || end - *buf < new_token->len)
return 0;
memcpy(*buf, new_token->data, new_token->len);
return 1;
}
/* Parse a NEW_TOKEN frame from <buf> buffer with <end> as end into <frm> frame.
* Return 1 if succeeded (enough room to parse this frame), 0 if not.
*/
static int quic_parse_new_token_frame(struct quic_frame *frm, struct quic_conn *qc,
const unsigned char **buf, const unsigned char *end)
{
struct quic_new_token *new_token = &frm->new_token;
if (!quic_dec_int(&new_token->len, buf, end) || end - *buf < new_token->len)
return 0;
new_token->data = *buf;
*buf += new_token->len;
return 1;
}
/* Encode a STREAM frame into <buf> buffer.
* Returns 1 if succeeded (enough room in <buf> to encode the frame), 0 if not.
*/
static int quic_build_stream_frame(unsigned char **buf, const unsigned char *end,
struct quic_frame *frm, struct quic_conn *conn)
{
struct quic_stream *stream = &frm->stream;
size_t offset, block1, block2;
struct buffer b;
if (!quic_enc_int(buf, end, stream->id) ||
((frm->type & QUIC_STREAM_FRAME_TYPE_OFF_BIT) && !quic_enc_int(buf, end, stream->offset.key)) ||
((frm->type & QUIC_STREAM_FRAME_TYPE_LEN_BIT) &&
(!quic_enc_int(buf, end, stream->len) || end - *buf < stream->len)))
return 0;
/* Buffer copy */
b = *stream->buf;
offset = (frm->type & QUIC_STREAM_FRAME_TYPE_OFF_BIT) ?
stream->offset.key & (b_size(stream->buf) - 1): 0;
block1 = b_wrap(&b) - (b_orig(&b) + offset);
if (block1 > stream->len)
block1 = stream->len;
block2 = stream->len - block1;
memcpy(*buf, b_orig(&b) + offset, block1);
*buf += block1;
if (block2) {
memcpy(*buf, b_orig(&b), block2);
*buf += block2;
}
return 1;
}
/* Parse a STREAM frame from <buf> buffer with <end> as end into <frm> frame.
* Return 1 if succeeded (enough room to parse this frame), 0 if not.
*/
static int quic_parse_stream_frame(struct quic_frame *frm, struct quic_conn *qc,
const unsigned char **buf, const unsigned char *end)
{
struct quic_stream *stream = &frm->stream;
if (!quic_dec_int(&stream->id, buf, end))
return 0;
/* Offset parsing */
if (!(frm->type & QUIC_STREAM_FRAME_TYPE_OFF_BIT)) {
stream->offset.key = 0;
}
else if (!quic_dec_int((uint64_t *)&stream->offset.key, buf, end))
return 0;
/* Length parsing */
if (!(frm->type & QUIC_STREAM_FRAME_TYPE_LEN_BIT)) {
stream->len = end - *buf;
}
else if (!quic_dec_int(&stream->len, buf, end) || end - *buf < stream->len)
return 0;
stream->data = *buf;
*buf += stream->len;
return 1;
}
/* Encode a MAX_DATA frame into <buf> buffer.
* Returns 1 if succeeded (enough room in <buf> to encode the frame), 0 if not.
*/
static int quic_build_max_data_frame(unsigned char **buf, const unsigned char *end,
struct quic_frame *frm, struct quic_conn *conn)
{
struct quic_max_data *max_data = &frm->max_data;
return quic_enc_int(buf, end, max_data->max_data);
}
/* Parse a MAX_DATA frame from <buf> buffer with <end> as end into <frm> frame.
* Return 1 if succeeded (enough room to parse this frame), 0 if not.
*/
static int quic_parse_max_data_frame(struct quic_frame *frm, struct quic_conn *qc,
const unsigned char **buf, const unsigned char *end)
{
struct quic_max_data *max_data = &frm->max_data;
return quic_dec_int(&max_data->max_data, buf, end);
}
/* Encode a MAX_STREAM_DATA frame into <buf> buffer.
* Returns 1 if succeeded (enough room in <buf> to encode the frame), 0 if not.
*/
static int quic_build_max_stream_data_frame(unsigned char **buf, const unsigned char *end,
struct quic_frame *frm, struct quic_conn *conn)
{
struct quic_max_stream_data *max_stream_data = &frm->max_stream_data;
return quic_enc_int(buf, end, max_stream_data->id) &&
quic_enc_int(buf, end, max_stream_data->max_stream_data);
}
/* Parse a MAX_STREAM_DATA frame from <buf> buffer with <end> as end into <frm> frame.
* Return 1 if succeeded (enough room to parse this frame), 0 if not.
*/
static int quic_parse_max_stream_data_frame(struct quic_frame *frm, struct quic_conn *qc,
const unsigned char **buf, const unsigned char *end)
{
struct quic_max_stream_data *max_stream_data = &frm->max_stream_data;
return quic_dec_int(&max_stream_data->id, buf, end) &&
quic_dec_int(&max_stream_data->max_stream_data, buf, end);
}
/* Encode a MAX_STREAMS frame for bidirectional streams into <buf> buffer.
* Returns 1 if succeeded (enough room in <buf> to encode the frame), 0 if not.
*/
static int quic_build_max_streams_bidi_frame(unsigned char **buf, const unsigned char *end,
struct quic_frame *frm, struct quic_conn *conn)
{
struct quic_max_streams *max_streams_bidi = &frm->max_streams_bidi;
return quic_enc_int(buf, end, max_streams_bidi->max_streams);
}
/* Parse a MAX_STREAMS frame for bidirectional streams from <buf> buffer with <end>
* as end into <frm> frame.
* Return 1 if succeeded (enough room to parse this frame), 0 if not.
*/
static int quic_parse_max_streams_bidi_frame(struct quic_frame *frm, struct quic_conn *qc,
const unsigned char **buf, const unsigned char *end)
{
struct quic_max_streams *max_streams_bidi = &frm->max_streams_bidi;
return quic_dec_int(&max_streams_bidi->max_streams, buf, end);
}
/* Encode a MAX_STREAMS frame for unidirectional streams into <buf> buffer.
* Returns 1 if succeeded (enough room in <buf> to encode the frame), 0 if not.
*/
static int quic_build_max_streams_uni_frame(unsigned char **buf, const unsigned char *end,
struct quic_frame *frm, struct quic_conn *conn)
{
struct quic_max_streams *max_streams_uni = &frm->max_streams_uni;
return quic_enc_int(buf, end, max_streams_uni->max_streams);
}
/* Parse a MAX_STREAMS frame for undirectional streams from <buf> buffer with <end>
* as end into <frm> frame.
* Return 1 if succeeded (enough room to parse this frame), 0 if not.
*/
static int quic_parse_max_streams_uni_frame(struct quic_frame *frm, struct quic_conn *qc,
const unsigned char **buf, const unsigned char *end)
{
struct quic_max_streams *max_streams_uni = &frm->max_streams_uni;
return quic_dec_int(&max_streams_uni->max_streams, buf, end);
}
/* Encode a DATA_BLOCKED frame into <buf> buffer.
* Returns 1 if succeeded (enough room in <buf> to encode the frame), 0 if not.
*/
static int quic_build_data_blocked_frame(unsigned char **buf, const unsigned char *end,
struct quic_frame *frm, struct quic_conn *conn)
{
struct quic_data_blocked *data_blocked = &frm->data_blocked;
return quic_enc_int(buf, end, data_blocked->limit);
}
/* Parse a DATA_BLOCKED frame from <buf> buffer with <end> as end into <frm> frame.
* Return 1 if succeeded (enough room to parse this frame), 0 if not.
*/
static int quic_parse_data_blocked_frame(struct quic_frame *frm, struct quic_conn *qc,
const unsigned char **buf, const unsigned char *end)
{
struct quic_data_blocked *data_blocked = &frm->data_blocked;
return quic_dec_int(&data_blocked->limit, buf, end);
}
/* Encode a STREAM_DATA_BLOCKED into <buf> buffer.
* Returns 1 if succeeded (enough room in <buf> to encode the frame), 0 if not.
*/
static int quic_build_stream_data_blocked_frame(unsigned char **buf, const unsigned char *end,
struct quic_frame *frm, struct quic_conn *conn)
{
struct quic_stream_data_blocked *stream_data_blocked = &frm->stream_data_blocked;
return quic_enc_int(buf, end, stream_data_blocked->id) &&
quic_enc_int(buf, end, stream_data_blocked->limit);
}
/* Parse a STREAM_DATA_BLOCKED frame from <buf> buffer with <end> as end into <frm> frame.
* Return 1 if succeeded (enough room to parse this frame), 0 if not.
*/
static int quic_parse_stream_data_blocked_frame(struct quic_frame *frm, struct quic_conn *qc,
const unsigned char **buf, const unsigned char *end)
{
struct quic_stream_data_blocked *stream_data_blocked = &frm->stream_data_blocked;
return quic_dec_int(&stream_data_blocked->id, buf, end) &&
quic_dec_int(&stream_data_blocked->limit, buf, end);
}
/* Encode a STREAMS_BLOCKED frame for bidirectional streams into <buf> buffer.
* Returns 1 if succeeded (enough room in <buf> to encode the frame), 0 if not.
*/
static int quic_build_streams_blocked_bidi_frame(unsigned char **buf, const unsigned char *end,
struct quic_frame *frm, struct quic_conn *conn)
{
struct quic_streams_blocked *streams_blocked_bidi = &frm->streams_blocked_bidi;
return quic_enc_int(buf, end, streams_blocked_bidi->limit);
}
/* Parse a STREAMS_BLOCKED frame for bidirectional streams from <buf> buffer with <end>
* as end into <frm> frame.
* Return 1 if succeeded (enough room to parse this frame), 0 if not.
*/
static int quic_parse_streams_blocked_bidi_frame(struct quic_frame *frm, struct quic_conn *qc,
const unsigned char **buf, const unsigned char *end)
{
struct quic_streams_blocked *streams_blocked_bidi = &frm->streams_blocked_bidi;
return quic_dec_int(&streams_blocked_bidi->limit, buf, end);
}
/* Encode a STREAMS_BLOCKED frame for unidirectional streams into <buf> buffer.
* Returns 1 if succeeded (enough room in <buf> to encode the frame), 0 if not.
*/
static int quic_build_streams_blocked_uni_frame(unsigned char **buf, const unsigned char *end,
struct quic_frame *frm, struct quic_conn *conn)
{
struct quic_streams_blocked *streams_blocked_uni = &frm->streams_blocked_uni;
return quic_enc_int(buf, end, streams_blocked_uni->limit);
}
/* Parse a STREAMS_BLOCKED frame for unidirectional streams from <buf> buffer with <end>
* as end into <frm> frame.
* Return 1 if succeeded (enough room to parse this frame), 0 if not.
*/
static int quic_parse_streams_blocked_uni_frame(struct quic_frame *frm, struct quic_conn *qc,
const unsigned char **buf, const unsigned char *end)
{
struct quic_streams_blocked *streams_blocked_uni = &frm->streams_blocked_uni;
return quic_dec_int(&streams_blocked_uni->limit, buf, end);
}
/* Encode a NEW_CONNECTION_ID frame into <buf> buffer.
* Returns 1 if succeeded (enough room in <buf> to encode the frame), 0 if not.
*/
static int quic_build_new_connection_id_frame(unsigned char **buf, const unsigned char *end,
struct quic_frame *frm, struct quic_conn *conn)
{
struct quic_new_connection_id *new_cid = &frm->new_connection_id;
if (!quic_enc_int(buf, end, new_cid->seq_num) ||
!quic_enc_int(buf, end, new_cid->retire_prior_to) ||
end - *buf < sizeof new_cid->cid.len + new_cid->cid.len + QUIC_STATELESS_RESET_TOKEN_LEN)
return 0;
*(*buf)++ = new_cid->cid.len;
if (new_cid->cid.len) {
memcpy(*buf, new_cid->cid.data, new_cid->cid.len);
*buf += new_cid->cid.len;
}
memcpy(*buf, new_cid->stateless_reset_token, QUIC_STATELESS_RESET_TOKEN_LEN);
*buf += QUIC_STATELESS_RESET_TOKEN_LEN;
return 1;
}
/* Parse a NEW_CONNECTION_ID frame from <buf> buffer with <end> as end into <frm> frame.
* Return 1 if succeeded (enough room to parse this frame), 0 if not.
*/
static int quic_parse_new_connection_id_frame(struct quic_frame *frm, struct quic_conn *qc,
const unsigned char **buf, const unsigned char *end)
{
struct quic_new_connection_id *new_cid = &frm->new_connection_id;
if (!quic_dec_int(&new_cid->seq_num, buf, end) ||
!quic_dec_int(&new_cid->retire_prior_to, buf, end) || end <= *buf)
return 0;
new_cid->cid.len = *(*buf)++;
if (end - *buf < new_cid->cid.len + QUIC_STATELESS_RESET_TOKEN_LEN)
return 0;
if (new_cid->cid.len) {
new_cid->cid.data = *buf;
*buf += new_cid->cid.len;
}
new_cid->stateless_reset_token = *buf;
*buf += QUIC_STATELESS_RESET_TOKEN_LEN;
return 1;
}
/* Encode a RETIRE_CONNECTION_ID frame into <buf> buffer.
* Returns 1 if succeeded (enough room in <buf> to encode the frame), 0 if not.
*/
static int quic_build_retire_connection_id_frame(unsigned char **buf, const unsigned char *end,
struct quic_frame *frm, struct quic_conn *conn)
{
struct quic_retire_connection_id *retire_connection_id = &frm->retire_connection_id;
return quic_enc_int(buf, end, retire_connection_id->seq_num);
}
/* Parse a RETIRE_CONNECTION_ID frame from <buf> buffer with <end> as end into <frm> frame.
* Return 1 if succeeded (enough room to parse this frame), 0 if not.
*/
static int quic_parse_retire_connection_id_frame(struct quic_frame *frm, struct quic_conn *qc,
const unsigned char **buf, const unsigned char *end)
{
struct quic_retire_connection_id *retire_connection_id = &frm->retire_connection_id;
return quic_dec_int(&retire_connection_id->seq_num, buf, end);
}
/* Encode a PATH_CHALLENGE frame into <buf> buffer.
* Returns 1 if succeeded (enough room in <buf> to encode the frame), 0 if not.
*/
static int quic_build_path_challenge_frame(unsigned char **buf, const unsigned char *end,
struct quic_frame *frm, struct quic_conn *conn)
{
struct quic_path_challenge *path_challenge = &frm->path_challenge;
if (end - *buf < sizeof path_challenge->data)
return 0;
memcpy(*buf, path_challenge->data, sizeof path_challenge->data);
*buf += sizeof path_challenge->data;
return 1;
}
/* Parse a PATH_CHALLENGE frame from <buf> buffer with <end> as end into <frm> frame.
* Return 1 if succeeded (enough room to parse this frame), 0 if not.
*/
static int quic_parse_path_challenge_frame(struct quic_frame *frm, struct quic_conn *qc,
const unsigned char **buf, const unsigned char *end)
{
struct quic_path_challenge *path_challenge = &frm->path_challenge;
if (end - *buf < sizeof path_challenge->data)
return 0;
memcpy(path_challenge->data, *buf, sizeof path_challenge->data);
*buf += sizeof path_challenge->data;
return 1;
}
/* Encode a PATH_RESPONSE frame into <buf> buffer.
* Returns 1 if succeeded (enough room in <buf> to encode the frame), 0 if not.
*/
static int quic_build_path_response_frame(unsigned char **buf, const unsigned char *end,
struct quic_frame *frm, struct quic_conn *conn)
{
struct quic_path_challenge_response *path_challenge_response = &frm->path_challenge_response;
if (end - *buf < sizeof path_challenge_response->data)
return 0;
memcpy(*buf, path_challenge_response->data, sizeof path_challenge_response->data);
*buf += sizeof path_challenge_response->data;
return 1;
}
/* Parse a PATH_RESPONSE frame from <buf> buffer with <end> as end into <frm> frame.
* Return 1 if succeeded (enough room to parse this frame), 0 if not.
*/
static int quic_parse_path_response_frame(struct quic_frame *frm, struct quic_conn *qc,
const unsigned char **buf, const unsigned char *end)
{
struct quic_path_challenge_response *path_challenge_response = &frm->path_challenge_response;
if (end - *buf < sizeof path_challenge_response->data)
return 0;
memcpy(path_challenge_response->data, *buf, sizeof path_challenge_response->data);
*buf += sizeof path_challenge_response->data;
return 1;
}
/* Encode a CONNECTION_CLOSE frame at QUIC layer into <buf> buffer.
* Note there exist two types of CONNECTION_CLOSE frame, one for the application layer
* and another at QUIC layer.
* Returns 1 if succeeded (enough room in <buf> to encode the frame), 0 if not.
*/
static int quic_build_connection_close_frame(unsigned char **buf, const unsigned char *end,
struct quic_frame *frm, struct quic_conn *conn)
{
struct quic_connection_close *connection_close = &frm->connection_close;
if (!quic_enc_int(buf, end, connection_close->error_code) ||
!quic_enc_int(buf, end, connection_close->frame_type) ||
!quic_enc_int(buf, end, connection_close->reason_phrase_len) ||
end - *buf < connection_close->reason_phrase_len)
return 0;
memcpy(*buf, connection_close->reason_phrase, connection_close->reason_phrase_len);
*buf += connection_close->reason_phrase_len;
return 1;
}
/* Parse a CONNECTION_CLOSE frame at QUIC layer from <buf> buffer with <end> as end into <frm> frame.
* Note there exist two types of CONNECTION_CLOSE frame, one for the application layer
* and another at QUIC layer.
* Return 1 if succeeded (enough room to parse this frame), 0 if not.
*/
static int quic_parse_connection_close_frame(struct quic_frame *frm, struct quic_conn *qc,
const unsigned char **buf, const unsigned char *end)
{
struct quic_connection_close *connection_close = &frm->connection_close;
if (!quic_dec_int(&connection_close->error_code, buf, end) ||
!quic_dec_int(&connection_close->frame_type, buf, end) ||
!quic_dec_int(&connection_close->reason_phrase_len, buf, end) ||
end - *buf < connection_close->reason_phrase_len)
return 0;
if (connection_close->reason_phrase_len) {
memcpy(connection_close->reason_phrase, *buf, connection_close->reason_phrase_len);
*buf += connection_close->reason_phrase_len;
}
return 1;
}
/* Encode a CONNECTION_CLOSE frame at application layer into <buf> buffer.
* Note there exist two types of CONNECTION_CLOSE frame, one for application layer
* and another at QUIC layer.
* Returns 1 if succeeded (enough room in <buf> to encode the frame), 0 if not.
*/
static int quic_build_connection_close_app_frame(unsigned char **buf, const unsigned char *end,
struct quic_frame *frm, struct quic_conn *conn)
{
struct quic_connection_close_app *connection_close_app = &frm->connection_close_app;
if (!quic_enc_int(buf, end, connection_close_app->error_code) ||
!quic_enc_int(buf, end, connection_close_app->reason_phrase_len) ||
end - *buf < connection_close_app->reason_phrase_len)
return 0;
if (connection_close_app->reason_phrase_len) {
memcpy(*buf, connection_close_app->reason_phrase, connection_close_app->reason_phrase_len);
*buf += connection_close_app->reason_phrase_len;
}
return 1;
}
/* Parse a CONNECTION_CLOSE frame at QUIC layer from <buf> buffer with <end> as end into <frm> frame.
* Note there exist two types of CONNECTION_CLOSE frame, one for the application layer
* and another at QUIC layer.
* Return 1 if succeeded (enough room to parse this frame), 0 if not.
*/
static int quic_parse_connection_close_app_frame(struct quic_frame *frm, struct quic_conn *qc,
const unsigned char **buf, const unsigned char *end)
{
struct quic_connection_close_app *connection_close_app = &frm->connection_close_app;
if (!quic_dec_int(&connection_close_app->error_code, buf, end) ||
!quic_dec_int(&connection_close_app->reason_phrase_len, buf, end) ||
end - *buf < connection_close_app->reason_phrase_len)
return 0;
memcpy(connection_close_app->reason_phrase, *buf, connection_close_app->reason_phrase_len);
*buf += connection_close_app->reason_phrase_len;
return 1;
}
/* Encode a HANDSHAKE_DONE frame into <buf> buffer.
* Always succeeds.
*/
static int quic_build_handshake_done_frame(unsigned char **buf, const unsigned char *end,
struct quic_frame *frm, struct quic_conn *conn)
{
/* No field */
return 1;
}
/* Parse a HANDSHAKE_DONE frame at QUIC layer from <buf> buffer with <end> as end into <frm> frame.
* Always succeed.
*/
static int quic_parse_handshake_done_frame(struct quic_frame *frm, struct quic_conn *qc,
const unsigned char **buf, const unsigned char *end)
{
/* No field */
return 1;
}
struct quic_frame_builder {
int (*func)(unsigned char **buf, const unsigned char *end,
struct quic_frame *frm, struct quic_conn *conn);
unsigned char flags;
unsigned char mask;
};
const struct quic_frame_builder quic_frame_builders[] = {
[QUIC_FT_PADDING] = { .func = quic_build_padding_frame, .flags = QUIC_FL_TX_PACKET_PADDING, .mask = QUIC_FT_PKT_TYPE_IH01_BITMASK, },
[QUIC_FT_PING] = { .func = quic_build_ping_frame, .flags = QUIC_FL_TX_PACKET_ACK_ELICITING, .mask = QUIC_FT_PKT_TYPE_IH01_BITMASK, },
[QUIC_FT_ACK] = { .func = quic_build_ack_frame, .flags = 0, .mask = QUIC_FT_PKT_TYPE_IH_1_BITMASK, },
[QUIC_FT_ACK_ECN] = { .func = quic_build_ack_ecn_frame, .flags = 0, .mask = QUIC_FT_PKT_TYPE_IH_1_BITMASK, },
[QUIC_FT_RESET_STREAM] = { .func = quic_build_reset_stream_frame, .flags = QUIC_FL_TX_PACKET_ACK_ELICITING, .mask = QUIC_FT_PKT_TYPE___01_BITMASK, },
[QUIC_FT_STOP_SENDING] = { .func = quic_build_stop_sending_frame, .flags = QUIC_FL_TX_PACKET_ACK_ELICITING, .mask = QUIC_FT_PKT_TYPE___01_BITMASK, },
[QUIC_FT_CRYPTO] = { .func = quic_build_crypto_frame, .flags = QUIC_FL_TX_PACKET_ACK_ELICITING, .mask = QUIC_FT_PKT_TYPE_IH_1_BITMASK, },
[QUIC_FT_NEW_TOKEN] = { .func = quic_build_new_token_frame, .flags = QUIC_FL_TX_PACKET_ACK_ELICITING, .mask = QUIC_FT_PKT_TYPE____1_BITMASK, },
[QUIC_FT_STREAM_8] = { .func = quic_build_stream_frame, .flags = QUIC_FL_TX_PACKET_ACK_ELICITING, .mask = QUIC_FT_PKT_TYPE___01_BITMASK, },
[QUIC_FT_STREAM_9] = { .func = quic_build_stream_frame, .flags = QUIC_FL_TX_PACKET_ACK_ELICITING, .mask = QUIC_FT_PKT_TYPE___01_BITMASK, },
[QUIC_FT_STREAM_A] = { .func = quic_build_stream_frame, .flags = QUIC_FL_TX_PACKET_ACK_ELICITING, .mask = QUIC_FT_PKT_TYPE___01_BITMASK, },
[QUIC_FT_STREAM_B] = { .func = quic_build_stream_frame, .flags = QUIC_FL_TX_PACKET_ACK_ELICITING, .mask = QUIC_FT_PKT_TYPE___01_BITMASK, },
[QUIC_FT_STREAM_C] = { .func = quic_build_stream_frame, .flags = QUIC_FL_TX_PACKET_ACK_ELICITING, .mask = QUIC_FT_PKT_TYPE___01_BITMASK, },
[QUIC_FT_STREAM_D] = { .func = quic_build_stream_frame, .flags = QUIC_FL_TX_PACKET_ACK_ELICITING, .mask = QUIC_FT_PKT_TYPE___01_BITMASK, },
[QUIC_FT_STREAM_E] = { .func = quic_build_stream_frame, .flags = QUIC_FL_TX_PACKET_ACK_ELICITING, .mask = QUIC_FT_PKT_TYPE___01_BITMASK, },
[QUIC_FT_STREAM_F] = { .func = quic_build_stream_frame, .flags = QUIC_FL_TX_PACKET_ACK_ELICITING, .mask = QUIC_FT_PKT_TYPE___01_BITMASK, },
[QUIC_FT_MAX_DATA] = { .func = quic_build_max_data_frame, .flags = QUIC_FL_TX_PACKET_ACK_ELICITING, .mask = QUIC_FT_PKT_TYPE___01_BITMASK, },
[QUIC_FT_MAX_STREAM_DATA] = { .func = quic_build_max_stream_data_frame, .flags = QUIC_FL_TX_PACKET_ACK_ELICITING, .mask = QUIC_FT_PKT_TYPE___01_BITMASK, },
[QUIC_FT_MAX_STREAMS_BIDI] = { .func = quic_build_max_streams_bidi_frame, .flags = QUIC_FL_TX_PACKET_ACK_ELICITING, .mask = QUIC_FT_PKT_TYPE___01_BITMASK, },
[QUIC_FT_MAX_STREAMS_UNI] = { .func = quic_build_max_streams_uni_frame, .flags = QUIC_FL_TX_PACKET_ACK_ELICITING, .mask = QUIC_FT_PKT_TYPE___01_BITMASK, },
[QUIC_FT_DATA_BLOCKED] = { .func = quic_build_data_blocked_frame, .flags = QUIC_FL_TX_PACKET_ACK_ELICITING, .mask = QUIC_FT_PKT_TYPE___01_BITMASK, },
[QUIC_FT_STREAM_DATA_BLOCKED] = { .func = quic_build_stream_data_blocked_frame, .flags = QUIC_FL_TX_PACKET_ACK_ELICITING, .mask = QUIC_FT_PKT_TYPE___01_BITMASK, },
[QUIC_FT_STREAMS_BLOCKED_BIDI] = { .func = quic_build_streams_blocked_bidi_frame, .flags = QUIC_FL_TX_PACKET_ACK_ELICITING, .mask = QUIC_FT_PKT_TYPE___01_BITMASK, },
[QUIC_FT_STREAMS_BLOCKED_UNI] = { .func = quic_build_streams_blocked_uni_frame, .flags = QUIC_FL_TX_PACKET_ACK_ELICITING, .mask = QUIC_FT_PKT_TYPE___01_BITMASK, },
[QUIC_FT_NEW_CONNECTION_ID] = { .func = quic_build_new_connection_id_frame, .flags = QUIC_FL_TX_PACKET_ACK_ELICITING, .mask = QUIC_FT_PKT_TYPE___01_BITMASK, },
[QUIC_FT_RETIRE_CONNECTION_ID] = { .func = quic_build_retire_connection_id_frame, .flags = QUIC_FL_TX_PACKET_ACK_ELICITING, .mask = QUIC_FT_PKT_TYPE___01_BITMASK, },
[QUIC_FT_PATH_CHALLENGE] = { .func = quic_build_path_challenge_frame, .flags = QUIC_FL_TX_PACKET_ACK_ELICITING, .mask = QUIC_FT_PKT_TYPE___01_BITMASK, },
[QUIC_FT_PATH_RESPONSE] = { .func = quic_build_path_response_frame, .flags = QUIC_FL_TX_PACKET_ACK_ELICITING, .mask = QUIC_FT_PKT_TYPE___01_BITMASK, },
[QUIC_FT_CONNECTION_CLOSE] = { .func = quic_build_connection_close_frame, .flags = 0, .mask = QUIC_FT_PKT_TYPE_IH01_BITMASK, },
[QUIC_FT_CONNECTION_CLOSE_APP] = { .func = quic_build_connection_close_app_frame, .flags = 0, .mask = QUIC_FT_PKT_TYPE___01_BITMASK, },
[QUIC_FT_HANDSHAKE_DONE] = { .func = quic_build_handshake_done_frame, .flags = QUIC_FL_TX_PACKET_ACK_ELICITING, .mask = QUIC_FT_PKT_TYPE____1_BITMASK, },
};
struct quic_frame_parser {
int (*func)(struct quic_frame *frm, struct quic_conn *qc,
const unsigned char **buf, const unsigned char *end);
unsigned char flags;
unsigned char mask;
};
const struct quic_frame_parser quic_frame_parsers[] = {
[QUIC_FT_PADDING] = { .func = quic_parse_padding_frame, .flags = 0, .mask = QUIC_FT_PKT_TYPE_IH01_BITMASK, },
[QUIC_FT_PING] = { .func = quic_parse_ping_frame, .flags = QUIC_FL_RX_PACKET_ACK_ELICITING, .mask = QUIC_FT_PKT_TYPE_IH01_BITMASK, },
[QUIC_FT_ACK] = { .func = quic_parse_ack_frame_header, .flags = 0, .mask = QUIC_FT_PKT_TYPE_IH_1_BITMASK, },
[QUIC_FT_ACK_ECN] = { .func = quic_parse_ack_ecn_frame, .flags = 0, .mask = QUIC_FT_PKT_TYPE_IH_1_BITMASK, },
[QUIC_FT_RESET_STREAM] = { .func = quic_parse_reset_stream_frame, .flags = QUIC_FL_RX_PACKET_ACK_ELICITING, .mask = QUIC_FT_PKT_TYPE___01_BITMASK, },
[QUIC_FT_STOP_SENDING] = { .func = quic_parse_stop_sending_frame, .flags = QUIC_FL_RX_PACKET_ACK_ELICITING, .mask = QUIC_FT_PKT_TYPE___01_BITMASK, },
[QUIC_FT_CRYPTO] = { .func = quic_parse_crypto_frame, .flags = QUIC_FL_RX_PACKET_ACK_ELICITING, .mask = QUIC_FT_PKT_TYPE_IH_1_BITMASK, },
[QUIC_FT_NEW_TOKEN] = { .func = quic_parse_new_token_frame, .flags = QUIC_FL_RX_PACKET_ACK_ELICITING, .mask = QUIC_FT_PKT_TYPE____1_BITMASK, },
[QUIC_FT_STREAM_8] = { .func = quic_parse_stream_frame, .flags = QUIC_FL_RX_PACKET_ACK_ELICITING, .mask = QUIC_FT_PKT_TYPE___01_BITMASK, },
[QUIC_FT_STREAM_9] = { .func = quic_parse_stream_frame, .flags = QUIC_FL_RX_PACKET_ACK_ELICITING, .mask = QUIC_FT_PKT_TYPE___01_BITMASK, },
[QUIC_FT_STREAM_A] = { .func = quic_parse_stream_frame, .flags = QUIC_FL_RX_PACKET_ACK_ELICITING, .mask = QUIC_FT_PKT_TYPE___01_BITMASK, },
[QUIC_FT_STREAM_B] = { .func = quic_parse_stream_frame, .flags = QUIC_FL_RX_PACKET_ACK_ELICITING, .mask = QUIC_FT_PKT_TYPE___01_BITMASK, },
[QUIC_FT_STREAM_C] = { .func = quic_parse_stream_frame, .flags = QUIC_FL_RX_PACKET_ACK_ELICITING, .mask = QUIC_FT_PKT_TYPE___01_BITMASK, },
[QUIC_FT_STREAM_D] = { .func = quic_parse_stream_frame, .flags = QUIC_FL_RX_PACKET_ACK_ELICITING, .mask = QUIC_FT_PKT_TYPE___01_BITMASK, },
[QUIC_FT_STREAM_E] = { .func = quic_parse_stream_frame, .flags = QUIC_FL_RX_PACKET_ACK_ELICITING, .mask = QUIC_FT_PKT_TYPE___01_BITMASK, },
[QUIC_FT_STREAM_F] = { .func = quic_parse_stream_frame, .flags = QUIC_FL_RX_PACKET_ACK_ELICITING, .mask = QUIC_FT_PKT_TYPE___01_BITMASK, },
[QUIC_FT_MAX_DATA] = { .func = quic_parse_max_data_frame, .flags = QUIC_FL_RX_PACKET_ACK_ELICITING, .mask = QUIC_FT_PKT_TYPE___01_BITMASK, },
[QUIC_FT_MAX_STREAM_DATA] = { .func = quic_parse_max_stream_data_frame, .flags = QUIC_FL_RX_PACKET_ACK_ELICITING, .mask = QUIC_FT_PKT_TYPE___01_BITMASK, },
[QUIC_FT_MAX_STREAMS_BIDI] = { .func = quic_parse_max_streams_bidi_frame, .flags = QUIC_FL_RX_PACKET_ACK_ELICITING, .mask = QUIC_FT_PKT_TYPE___01_BITMASK, },
[QUIC_FT_MAX_STREAMS_UNI] = { .func = quic_parse_max_streams_uni_frame, .flags = QUIC_FL_RX_PACKET_ACK_ELICITING, .mask = QUIC_FT_PKT_TYPE___01_BITMASK, },
[QUIC_FT_DATA_BLOCKED] = { .func = quic_parse_data_blocked_frame, .flags = QUIC_FL_RX_PACKET_ACK_ELICITING, .mask = QUIC_FT_PKT_TYPE___01_BITMASK, },
[QUIC_FT_STREAM_DATA_BLOCKED] = { .func = quic_parse_stream_data_blocked_frame, .flags = QUIC_FL_RX_PACKET_ACK_ELICITING, .mask = QUIC_FT_PKT_TYPE___01_BITMASK, },
[QUIC_FT_STREAMS_BLOCKED_BIDI] = { .func = quic_parse_streams_blocked_bidi_frame, .flags = QUIC_FL_RX_PACKET_ACK_ELICITING, .mask = QUIC_FT_PKT_TYPE___01_BITMASK, },
[QUIC_FT_STREAMS_BLOCKED_UNI] = { .func = quic_parse_streams_blocked_uni_frame, .flags = QUIC_FL_RX_PACKET_ACK_ELICITING, .mask = QUIC_FT_PKT_TYPE___01_BITMASK, },
[QUIC_FT_NEW_CONNECTION_ID] = { .func = quic_parse_new_connection_id_frame, .flags = QUIC_FL_RX_PACKET_ACK_ELICITING, .mask = QUIC_FT_PKT_TYPE___01_BITMASK, },
[QUIC_FT_RETIRE_CONNECTION_ID] = { .func = quic_parse_retire_connection_id_frame, .flags = QUIC_FL_RX_PACKET_ACK_ELICITING, .mask = QUIC_FT_PKT_TYPE___01_BITMASK, },
[QUIC_FT_PATH_CHALLENGE] = { .func = quic_parse_path_challenge_frame, .flags = QUIC_FL_RX_PACKET_ACK_ELICITING, .mask = QUIC_FT_PKT_TYPE___01_BITMASK, },
[QUIC_FT_PATH_RESPONSE] = { .func = quic_parse_path_response_frame, .flags = QUIC_FL_RX_PACKET_ACK_ELICITING, .mask = QUIC_FT_PKT_TYPE___01_BITMASK, },
[QUIC_FT_CONNECTION_CLOSE] = { .func = quic_parse_connection_close_frame, .flags = 0, .mask = QUIC_FT_PKT_TYPE_IH01_BITMASK, },
[QUIC_FT_CONNECTION_CLOSE_APP] = { .func = quic_parse_connection_close_app_frame, .flags = 0, .mask = QUIC_FT_PKT_TYPE___01_BITMASK, },
[QUIC_FT_HANDSHAKE_DONE] = { .func = quic_parse_handshake_done_frame, .flags = QUIC_FL_RX_PACKET_ACK_ELICITING, .mask = QUIC_FT_PKT_TYPE____1_BITMASK, },
};
/* Decode a QUIC frame from <buf> buffer into <frm> frame.
* Returns 1 if succeeded (enough data to parse the frame), 0 if not.
*/
int qc_parse_frm(struct quic_frame *frm, struct quic_rx_packet *pkt,
const unsigned char **buf, const unsigned char *end,
struct quic_conn *conn)
{
const struct quic_frame_parser *parser;
if (end <= *buf) {
TRACE_DEVEL("wrong frame", QUIC_EV_CONN_PRSFRM, conn->conn);
return 0;
}
frm->type = *(*buf)++;
if (frm->type > QUIC_FT_MAX) {
TRACE_DEVEL("wrong frame type", QUIC_EV_CONN_PRSFRM, conn->conn, frm);
return 0;
}
parser = &quic_frame_parsers[frm->type];
if (!(parser->mask & (1 << pkt->type))) {
TRACE_DEVEL("unauthorized frame", QUIC_EV_CONN_PRSFRM, conn->conn, frm);
return 0;
}
TRACE_PROTO("frame", QUIC_EV_CONN_PRSFRM, conn->conn, frm);
if (!parser->func(frm, conn, buf, end)) {
TRACE_DEVEL("parsing error", QUIC_EV_CONN_PRSFRM, conn->conn, frm);
return 0;
}
pkt->flags |= parser->flags;
return 1;
}
/* Encode <frm> QUIC frame into <buf> buffer.
* Returns 1 if succeeded (enough room in <buf> to encode the frame), 0 if not.
*/
int qc_build_frm(unsigned char **buf, const unsigned char *end,
struct quic_frame *frm, struct quic_tx_packet *pkt,
struct quic_conn *conn)
{
const struct quic_frame_builder *builder;
builder = &quic_frame_builders[frm->type];
if (!(builder->mask & (1 << pkt->type))) {
/* XXX This it a bug to send an unauthorized frame with such a packet type XXX */
TRACE_DEVEL("frame skipped", QUIC_EV_CONN_BFRM, conn->conn, frm);
BUG_ON(!(builder->mask & (1 << pkt->type)));
}
if (end <= *buf) {
TRACE_DEVEL("not enough room", QUIC_EV_CONN_BFRM, conn->conn, frm);
return 0;
}
TRACE_PROTO("frame", QUIC_EV_CONN_BFRM, conn->conn, frm);
*(*buf)++ = frm->type;
if (!quic_frame_builders[frm->type].func(buf, end, frm, conn)) {
TRACE_DEVEL("frame building error", QUIC_EV_CONN_BFRM, conn->conn, frm);
return 0;
}
pkt->flags |= builder->flags;
return 1;
}