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haproxy/src/quic_frame.c

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/*
* Copyright 2019 HAProxy Technologies, Frederic Lecaille <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 <string.h>
#include <import/eb64tree.h>
#include <haproxy/buf-t.h>
#include <haproxy/chunk.h>
#include <haproxy/pool.h>
#include <haproxy/quic_conn-t.h>
#include <haproxy/quic_enc.h>
#include <haproxy/quic_frame.h>
#include <haproxy/quic_rx-t.h>
#include <haproxy/quic_tp-t.h>
#include <haproxy/quic_trace.h>
#include <haproxy/quic_tx.h>
#include <haproxy/trace.h>
DECLARE_POOL(pool_head_quic_frame, "quic_frame", sizeof(struct quic_frame));
DECLARE_POOL(pool_head_qf_crypto, "qf_crypto", sizeof(struct qf_crypto));
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_ECN";
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";
}
}
static void chunk_cc_phrase_appendf(struct buffer *buf,
const unsigned char *phr, size_t phrlen)
{
chunk_appendf(buf, " reason_phrase: '");
while (phrlen--)
chunk_appendf(buf, "%c", *phr++);
chunk_appendf(buf, "'");
}
/* Add traces to <buf> depending on <frm> frame type. */
void chunk_frm_appendf(struct buffer *buf, const struct quic_frame *frm)
{
chunk_appendf(buf, " %s", quic_frame_type_string(frm->type));
switch (frm->type) {
case QUIC_FT_CRYPTO:
{
const struct qf_crypto *crypto_frm = &frm->crypto;
chunk_appendf(buf, " cfoff=%llu cflen=%llu",
(ull)crypto_frm->offset, (ull)crypto_frm->len);
break;
}
case QUIC_FT_RESET_STREAM:
{
const struct qf_reset_stream *rs_frm = &frm->reset_stream;
chunk_appendf(buf, " id=%llu app_error_code=%llu final_size=%llu",
(ull)rs_frm->id, (ull)rs_frm->app_error_code, (ull)rs_frm->final_size);
break;
}
case QUIC_FT_STOP_SENDING:
{
const struct qf_stop_sending *ss_frm = &frm->stop_sending;
chunk_appendf(&trace_buf, " id=%llu app_error_code=%llu",
(ull)ss_frm->id, (ull)ss_frm->app_error_code);
break;
}
case QUIC_FT_STREAM_8 ... QUIC_FT_STREAM_F:
{
const struct qf_stream *strm_frm = &frm->stream;
chunk_appendf(&trace_buf, " uni=%d fin=%d id=%llu off=%llu len=%llu",
!!(strm_frm->id & QUIC_STREAM_FRAME_ID_DIR_BIT),
!!(frm->type & QUIC_STREAM_FRAME_TYPE_FIN_BIT),
(ull)strm_frm->id, (ull)strm_frm->offset.key, (ull)strm_frm->len);
break;
}
case QUIC_FT_MAX_DATA:
{
const struct qf_max_data *md_frm = &frm->max_data;
chunk_appendf(&trace_buf, " max_data=%llu", (ull)md_frm->max_data);
break;
}
case QUIC_FT_MAX_STREAM_DATA:
{
const struct qf_max_stream_data *msd_frm = &frm->max_stream_data;
chunk_appendf(&trace_buf, " id=%llu max_stream_data=%llu",
(ull)msd_frm->id, (ull)msd_frm->max_stream_data);
break;
}
case QUIC_FT_MAX_STREAMS_BIDI:
{
const struct qf_max_streams *ms_frm = &frm->max_streams_bidi;
chunk_appendf(&trace_buf, " max_streams=%llu", (ull)ms_frm->max_streams);
break;
}
case QUIC_FT_MAX_STREAMS_UNI:
{
const struct qf_max_streams *ms_frm = &frm->max_streams_uni;
chunk_appendf(&trace_buf, " max_streams=%llu", (ull)ms_frm->max_streams);
break;
}
case QUIC_FT_DATA_BLOCKED:
{
const struct qf_data_blocked *db_frm = &frm->data_blocked;
chunk_appendf(&trace_buf, " limit=%llu", (ull)db_frm->limit);
break;
}
case QUIC_FT_STREAM_DATA_BLOCKED:
{
const struct qf_stream_data_blocked *sdb_frm = &frm->stream_data_blocked;
chunk_appendf(&trace_buf, " id=%llu limit=%llu",
(ull)sdb_frm->id, (ull)sdb_frm->limit);
break;
}
case QUIC_FT_STREAMS_BLOCKED_BIDI:
{
const struct qf_streams_blocked *sb_frm = &frm->streams_blocked_bidi;
chunk_appendf(&trace_buf, " limit=%llu", (ull)sb_frm->limit);
break;
}
case QUIC_FT_STREAMS_BLOCKED_UNI:
{
const struct qf_streams_blocked *sb_frm = &frm->streams_blocked_uni;
chunk_appendf(&trace_buf, " limit=%llu", (ull)sb_frm->limit);
break;
}
case QUIC_FT_RETIRE_CONNECTION_ID:
{
const struct qf_retire_connection_id *rcid_frm = &frm->retire_connection_id;
chunk_appendf(&trace_buf, " seq_num=%llu", (ull)rcid_frm->seq_num);
break;
}
case QUIC_FT_CONNECTION_CLOSE:
{
const struct qf_connection_close *cc_frm = &frm->connection_close;
size_t plen = QUIC_MIN((size_t)cc_frm->reason_phrase_len, sizeof cc_frm->reason_phrase);
chunk_appendf(&trace_buf,
" error_code=%llu frame_type=%llu reason_phrase_len=%llu",
(ull)cc_frm->error_code, (ull)cc_frm->frame_type,
(ull)cc_frm->reason_phrase_len);
if (plen)
chunk_cc_phrase_appendf(&trace_buf, cc_frm->reason_phrase, plen);
break;
}
case QUIC_FT_CONNECTION_CLOSE_APP:
{
const struct qf_connection_close_app *cc_frm = &frm->connection_close_app;
size_t plen = QUIC_MIN((size_t)cc_frm->reason_phrase_len, sizeof cc_frm->reason_phrase);
chunk_appendf(&trace_buf,
" error_code=%llu reason_phrase_len=%llu",
(ull)cc_frm->error_code, (ull)cc_frm->reason_phrase_len);
if (plen)
chunk_cc_phrase_appendf(&trace_buf, cc_frm->reason_phrase, plen);
break;
}
}
}
/* Encode <frm> PADDING frame at <pos> buffer position, <end> being one byte past the end
* of this buffer.
* Returns 1 if succeeded (enough room in the buffer to encode the frame), 0 if not.
*/
static int quic_build_padding_frame(unsigned char **pos, const unsigned char *end,
struct quic_frame *frm, struct quic_conn *conn)
{
struct qf_padding *padding_frm = &frm->padding;
if (end - *pos < padding_frm->len - 1)
return 0;
memset(*pos, 0, padding_frm->len - 1);
*pos += padding_frm->len - 1;
return 1;
}
/* Parse a PADDING frame at <pos> buffer position 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 **pos, const unsigned char *end)
{
const unsigned char *beg;
struct qf_padding *padding_frm = &frm->padding;
beg = *pos;
padding_frm->len = 1;
while (*pos < end && !**pos)
(*pos)++;
padding_frm->len += *pos - beg;
return 1;
}
/* Encode a ACK frame at <pos> buffer position.
* Always succeeds.
*/
static int quic_build_ping_frame(unsigned char **pos, const unsigned char *end,
struct quic_frame *frm, struct quic_conn *conn)
{
/* No field */
return 1;
}
/* Parse a PADDING frame from <pos> buffer position 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 **pos, const unsigned char *end)
{
/* No field */
return 1;
}
/* Encode a ACK frame.
* Returns 1 if succeeded (enough room at <pos> buffer position to encode the frame), 0 if not.
*/
static int quic_build_ack_frame(unsigned char **pos, const unsigned char *end,
struct quic_frame *frm, struct quic_conn *qc)
{
struct qf_tx_ack *ack_frm = &frm->tx_ack;
struct eb64_node *ar, *prev_ar;
struct quic_arng_node *ar_node, *prev_ar_node;
ar = eb64_last(&ack_frm->arngs->root);
ar_node = eb64_entry(ar, struct quic_arng_node, first);
TRACE_PROTO("TX ack range", QUIC_EV_CONN_PRSAFRM,
qc,, &ar_node->last, &ar_node->first.key);
if (!quic_enc_int(pos, end, ar_node->last) ||
!quic_enc_int(pos, end, ack_frm->ack_delay) ||
!quic_enc_int(pos, end, ack_frm->arngs->sz - 1) ||
!quic_enc_int(pos, end, ar_node->last - ar_node->first.key))
return 0;
while ((prev_ar = eb64_prev(ar))) {
prev_ar_node = eb64_entry(prev_ar, struct quic_arng_node, first);
TRACE_PROTO("TX ack range", QUIC_EV_CONN_PRSAFRM, qc,,
&prev_ar_node->last, &prev_ar_node->first.key);
if (!quic_enc_int(pos, end, ar_node->first.key - prev_ar_node->last - 2) ||
!quic_enc_int(pos, end, prev_ar_node->last - prev_ar_node->first.key))
return 0;
ar = prev_ar;
ar_node = eb64_entry(ar, struct quic_arng_node, first);
}
return 1;
}
/* Parse an ACK frame header at <pos> buffer position with <end> as end into <frm> frame.
* Return 1 if succeeded (enough room at <pos> buffer position 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 **pos, const unsigned char *end)
{
int ret;
struct qf_ack *ack_frm = &frm->ack;
ret = quic_dec_int(&ack_frm->largest_ack, pos, end);
if (!ret)
return 0;
ret = quic_dec_int(&ack_frm->ack_delay, pos, end);
if (!ret)
return 0;
ret = quic_dec_int(&ack_frm->ack_range_num, pos, end);
if (!ret)
return 0;
ret = quic_dec_int(&ack_frm->first_ack_range, pos, end);
if (!ret)
return 0;
return 1;
}
/* Encode a ACK_ECN frame.
* Returns 1 if succeeded (enough room at <pos> buffer position to encode the frame), 0 if not.
*/
static int quic_build_ack_ecn_frame(unsigned char **pos, const unsigned char *end,
struct quic_frame *frm, struct quic_conn *conn)
{
struct qf_ack *ack_frm = &frm->ack;
return quic_enc_int(pos, end, ack_frm->largest_ack) &&
quic_enc_int(pos, end, ack_frm->ack_delay) &&
quic_enc_int(pos, end, ack_frm->first_ack_range) &&
quic_enc_int(pos, end, ack_frm->ack_range_num);
}
/* Parse an ACK_ECN frame at <pos> buffer position with <end> as end into <frm> frame.
* Return 1 if succeeded (enough at <pos> buffer position 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 **pos, const unsigned char *end)
{
struct qf_ack *ack_frm = &frm->ack;
return quic_dec_int(&ack_frm->largest_ack, pos, end) &&
quic_dec_int(&ack_frm->ack_delay, pos, end) &&
quic_dec_int(&ack_frm->first_ack_range, pos, end) &&
quic_dec_int(&ack_frm->ack_range_num, pos, end);
}
/* Encode a RESET_STREAM frame at <pos> buffer position.
* Returns 1 if succeeded (enough room at <pos> buffer position to encode the frame), 0 if not.
*/
static int quic_build_reset_stream_frame(unsigned char **pos, const unsigned char *end,
struct quic_frame *frm, struct quic_conn *conn)
{
struct qf_reset_stream *rs_frm = &frm->reset_stream;
return quic_enc_int(pos, end, rs_frm->id) &&
quic_enc_int(pos, end, rs_frm->app_error_code) &&
quic_enc_int(pos, end, rs_frm->final_size);
}
/* Parse a RESET_STREAM frame at <pos> buffer position 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 **pos, const unsigned char *end)
{
struct qf_reset_stream *rs_frm = &frm->reset_stream;
return quic_dec_int(&rs_frm->id, pos, end) &&
quic_dec_int(&rs_frm->app_error_code, pos, end) &&
quic_dec_int(&rs_frm->final_size, pos, end);
}
/* Encode a STOP_SENDING frame.
* Returns 1 if succeeded (enough room at <pos> buffer position to encode the frame), 0 if not.
*/
static int quic_build_stop_sending_frame(unsigned char **pos, const unsigned char *end,
struct quic_frame *frm, struct quic_conn *conn)
{
struct qf_stop_sending *ss_frm = &frm->stop_sending;
return quic_enc_int(pos, end, ss_frm->id) &&
quic_enc_int(pos, end, ss_frm->app_error_code);
}
/* Parse a STOP_SENDING frame at <pos> buffer position with <end> as end into <frm> frame.
* Return 1 if succeeded (enough room at <pos> buffer position 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 **pos, const unsigned char *end)
{
struct qf_stop_sending *ss_frm = &frm->stop_sending;
return quic_dec_int(&ss_frm->id, pos, end) &&
quic_dec_int(&ss_frm->app_error_code, pos, end);
}
/* Encode a CRYPTO frame at <pos> buffer position.
* Returns 1 if succeeded (enough room at <pos> buffer position to encode the frame), 0 if not.
*/
static int quic_build_crypto_frame(unsigned char **pos, const unsigned char *end,
struct quic_frame *frm, struct quic_conn *conn)
{
struct qf_crypto *crypto_frm = &frm->crypto;
const struct quic_enc_level *qel = crypto_frm->qel;
size_t offset, len;
if (!quic_enc_int(pos, end, crypto_frm->offset) ||
!quic_enc_int(pos, end, crypto_frm->len) || end - *pos < crypto_frm->len)
return 0;
len = crypto_frm->len;
offset = crypto_frm->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(*pos, data, to_copy);
*pos += to_copy;
offset += to_copy;
len -= to_copy;
}
return 1;
}
/* Parse a CRYPTO frame from <pos> buffer position 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 **pos, const unsigned char *end)
{
struct qf_crypto *crypto_frm = &frm->crypto;
if (!quic_dec_int(&crypto_frm->offset, pos, end) ||
!quic_dec_int(&crypto_frm->len, pos, end) || end - *pos < crypto_frm->len)
return 0;
crypto_frm->data = *pos;
*pos += crypto_frm->len;
return 1;
}
/* Encode a NEW_TOKEN frame at <pos> buffer position.
* Returns 1 if succeeded (enough room at <pos> buffer position to encode the frame), 0 if not.
*/
static int quic_build_new_token_frame(unsigned char **pos, const unsigned char *end,
struct quic_frame *frm, struct quic_conn *conn)
{
struct qf_new_token *new_token_frm = &frm->new_token;
if (!quic_enc_int(pos, end, new_token_frm->len) || end - *pos < new_token_frm->len)
return 0;
memcpy(*pos, new_token_frm->data, new_token_frm->len);
return 1;
}
/* Parse a NEW_TOKEN frame at <pos> buffer position with <end> as end into <frm> frame.
* Return 1 if succeeded (enough room at <pos> buffer position 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 **pos, const unsigned char *end)
{
struct qf_new_token *new_token_frm = &frm->new_token;
if (!quic_dec_int(&new_token_frm->len, pos, end) || end - *pos < new_token_frm->len)
return 0;
new_token_frm->data = *pos;
*pos += new_token_frm->len;
return 1;
}
/* Encode a STREAM frame at <pos> buffer position.
* Returns 1 if succeeded (enough room at <pos> buffer position to encode the frame), 0 if not.
*/
static int quic_build_stream_frame(unsigned char **pos, const unsigned char *end,
struct quic_frame *frm, struct quic_conn *conn)
{
struct qf_stream *strm_frm = &frm->stream;
const unsigned char *wrap;
/* Caller must set OFF bit if and only if a non-null offset is used. */
BUG_ON(!!(frm->type & QUIC_STREAM_FRAME_TYPE_OFF_BIT) !=
!!strm_frm->offset.key);
if (!quic_enc_int(pos, end, strm_frm->id) ||
((frm->type & QUIC_STREAM_FRAME_TYPE_OFF_BIT) && !quic_enc_int(pos, end, strm_frm->offset.key)) ||
((frm->type & QUIC_STREAM_FRAME_TYPE_LEN_BIT) &&
(!quic_enc_int(pos, end, strm_frm->len) || end - *pos < strm_frm->len)))
return 0;
/* No need for data memcpy if no payload. */
if (!strm_frm->len)
return 1;
wrap = (const unsigned char *)b_wrap(strm_frm->buf);
if (strm_frm->data + strm_frm->len > wrap) {
size_t to_copy = wrap - strm_frm->data;
memcpy(*pos, strm_frm->data, to_copy);
*pos += to_copy;
to_copy = strm_frm->len - to_copy;
memcpy(*pos, b_orig(strm_frm->buf), to_copy);
*pos += to_copy;
}
else {
memcpy(*pos, strm_frm->data, strm_frm->len);
*pos += strm_frm->len;
}
return 1;
}
/* Parse a STREAM frame at <pos> buffer position with <end> as end into <frm> frame.
* Return 1 if succeeded (enough room at <pos> buffer position to parse this frame), 0 if not.
*/
static int quic_parse_stream_frame(struct quic_frame *frm, struct quic_conn *qc,
const unsigned char **pos, const unsigned char *end)
{
struct qf_stream *strm_frm = &frm->stream;
if (!quic_dec_int(&strm_frm->id, pos, end))
return 0;
/* Offset parsing */
if (!(frm->type & QUIC_STREAM_FRAME_TYPE_OFF_BIT)) {
strm_frm->offset.key = 0;
}
else if (!quic_dec_int((uint64_t *)&strm_frm->offset.key, pos, end))
return 0;
/* Length parsing */
if (!(frm->type & QUIC_STREAM_FRAME_TYPE_LEN_BIT)) {
strm_frm->len = end - *pos;
}
else if (!quic_dec_int(&strm_frm->len, pos, end) || end - *pos < strm_frm->len)
return 0;
strm_frm->data = *pos;
*pos += strm_frm->len;
return 1;
}
/* Encode a MAX_DATA frame at <pos> buffer position.
* Returns 1 if succeeded (enough room at <pos> buffer position to encode the frame), 0 if not.
*/
static int quic_build_max_data_frame(unsigned char **pos, const unsigned char *end,
struct quic_frame *frm, struct quic_conn *conn)
{
struct qf_max_data *md_frm = &frm->max_data;
return quic_enc_int(pos, end, md_frm->max_data);
}
/* Parse a MAX_DATA frame at <pos> buffer position 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 **pos, const unsigned char *end)
{
struct qf_max_data *md_frm = &frm->max_data;
return quic_dec_int(&md_frm->max_data, pos, end);
}
/* Encode a MAX_STREAM_DATA frame at <pos> buffer position.
* Returns 1 if succeeded (enough room at <pos> buffer position to encode the frame), 0 if not.
*/
static int quic_build_max_stream_data_frame(unsigned char **pos, const unsigned char *end,
struct quic_frame *frm, struct quic_conn *conn)
{
struct qf_max_stream_data *msd_frm = &frm->max_stream_data;
return quic_enc_int(pos, end, msd_frm->id) &&
quic_enc_int(pos, end, msd_frm->max_stream_data);
}
/* Parse a MAX_STREAM_DATA frame at <pos> buffer position 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 **pos, const unsigned char *end)
{
struct qf_max_stream_data *msd_frm = &frm->max_stream_data;
return quic_dec_int(&msd_frm->id, pos, end) &&
quic_dec_int(&msd_frm->max_stream_data, pos, end);
}
/* Encode a MAX_STREAMS frame for bidirectional streams at <buf> buffer position.
* Returns 1 if succeeded (enough room at <pos> buffer position to encode the frame), 0 if not.
*/
static int quic_build_max_streams_bidi_frame(unsigned char **pos, const unsigned char *end,
struct quic_frame *frm, struct quic_conn *conn)
{
struct qf_max_streams *ms_frm = &frm->max_streams_bidi;
return quic_enc_int(pos, end, ms_frm->max_streams);
}
/* Parse a MAX_STREAMS frame for bidirectional streams at <pos> buffer position 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 **pos, const unsigned char *end)
{
struct qf_max_streams *ms_frm = &frm->max_streams_bidi;
return quic_dec_int(&ms_frm->max_streams, pos, end);
}
/* Encode a MAX_STREAMS frame for unidirectional streams at <pos> buffer position.
* Returns 1 if succeeded (enough room at <pos> buffer position to encode the frame), 0 if not.
*/
static int quic_build_max_streams_uni_frame(unsigned char **pos, const unsigned char *end,
struct quic_frame *frm, struct quic_conn *conn)
{
struct qf_max_streams *ms_frm = &frm->max_streams_uni;
return quic_enc_int(pos, end, ms_frm->max_streams);
}
/* Parse a MAX_STREAMS frame for undirectional streams at <pos> buffer position 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 **pos, const unsigned char *end)
{
struct qf_max_streams *ms_frm = &frm->max_streams_uni;
return quic_dec_int(&ms_frm->max_streams, pos, end);
}
/* Encode a DATA_BLOCKED frame at <pos> buffer position.
* Returns 1 if succeeded (enough room at <pos> buffer position to encode the frame), 0 if not.
*/
static int quic_build_data_blocked_frame(unsigned char **pos, const unsigned char *end,
struct quic_frame *frm, struct quic_conn *conn)
{
struct qf_data_blocked *db_frm = &frm->data_blocked;
return quic_enc_int(pos, end, db_frm->limit);
}
/* Parse a DATA_BLOCKED frame at <pos> buffer position 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 **pos, const unsigned char *end)
{
struct qf_data_blocked *db_frm = &frm->data_blocked;
return quic_dec_int(&db_frm->limit, pos, end);
}
/* Encode a STREAM_DATA_BLOCKED at <pos> buffer position.
* Returns 1 if succeeded (enough room at <pos> buffer position to encode the frame), 0 if not.
*/
static int quic_build_stream_data_blocked_frame(unsigned char **pos, const unsigned char *end,
struct quic_frame *frm, struct quic_conn *conn)
{
struct qf_stream_data_blocked *sdb_frm = &frm->stream_data_blocked;
return quic_enc_int(pos, end, sdb_frm->id) &&
quic_enc_int(pos, end, sdb_frm->limit);
}
/* Parse a STREAM_DATA_BLOCKED frame at <pos> buffer position 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 **pos, const unsigned char *end)
{
struct qf_stream_data_blocked *sdb_frm = &frm->stream_data_blocked;
return quic_dec_int(&sdb_frm->id, pos, end) &&
quic_dec_int(&sdb_frm->limit, pos, end);
}
/* Encode a STREAMS_BLOCKED frame for bidirectional streams at <pos> buffer position.
* Returns 1 if succeeded (enough room at <pos> buffer position to encode the frame), 0 if not.
*/
static int quic_build_streams_blocked_bidi_frame(unsigned char **pos, const unsigned char *end,
struct quic_frame *frm, struct quic_conn *conn)
{
struct qf_streams_blocked *sb_frm = &frm->streams_blocked_bidi;
return quic_enc_int(pos, end, sb_frm->limit);
}
/* Parse a STREAMS_BLOCKED frame for bidirectional streams at <pos> buffer position with <end>
* as end into <frm> frame.
* Return 1 if succeeded (enough room at <pos> buffer position 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 **pos, const unsigned char *end)
{
struct qf_streams_blocked *sb_frm = &frm->streams_blocked_bidi;
return quic_dec_int(&sb_frm->limit, pos, end);
}
/* Encode a STREAMS_BLOCKED frame for unidirectional streams at <pos> buffer position.
* Returns 1 if succeeded (enough room at <pos> buffer position to encode the frame), 0 if not.
*/
static int quic_build_streams_blocked_uni_frame(unsigned char **pos, const unsigned char *end,
struct quic_frame *frm, struct quic_conn *conn)
{
struct qf_streams_blocked *sb_frm = &frm->streams_blocked_uni;
return quic_enc_int(pos, end, sb_frm->limit);
}
/* Parse a STREAMS_BLOCKED frame for unidirectional streams at <pos> buffer position with <end>
* as end into <frm> frame.
* Return 1 if succeeded (enough room at <pos> buffer position 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 **pos, const unsigned char *end)
{
struct qf_streams_blocked *sb_frm = &frm->streams_blocked_uni;
return quic_dec_int(&sb_frm->limit, pos, end);
}
/* Encode a NEW_CONNECTION_ID frame at <pos> buffer position.
* Returns 1 if succeeded (enough room at <pos> buffer position to encode the frame), 0 if not.
*/
static int quic_build_new_connection_id_frame(unsigned char **pos, const unsigned char *end,
struct quic_frame *frm, struct quic_conn *conn)
{
struct qf_new_connection_id *ncid_frm = &frm->new_connection_id;
if (!quic_enc_int(pos, end, ncid_frm->seq_num) ||
!quic_enc_int(pos, end, ncid_frm->retire_prior_to) ||
end - *pos < sizeof ncid_frm->cid.len + ncid_frm->cid.len + QUIC_STATELESS_RESET_TOKEN_LEN)
return 0;
*(*pos)++ = ncid_frm->cid.len;
if (ncid_frm->cid.len) {
memcpy(*pos, ncid_frm->cid.data, ncid_frm->cid.len);
*pos += ncid_frm->cid.len;
}
memcpy(*pos, ncid_frm->stateless_reset_token, QUIC_STATELESS_RESET_TOKEN_LEN);
*pos += QUIC_STATELESS_RESET_TOKEN_LEN;
return 1;
}
/* Parse a NEW_CONNECTION_ID frame at <pos> buffer position 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 **pos, const unsigned char *end)
{
struct qf_new_connection_id *ncid_frm = &frm->new_connection_id;
if (!quic_dec_int(&ncid_frm->seq_num, pos, end) ||
!quic_dec_int(&ncid_frm->retire_prior_to, pos, end) || end <= *pos)
return 0;
ncid_frm->cid.len = *(*pos)++;
if (end - *pos < ncid_frm->cid.len + QUIC_STATELESS_RESET_TOKEN_LEN)
return 0;
if (ncid_frm->cid.len) {
ncid_frm->cid.data = *pos;
*pos += ncid_frm->cid.len;
}
ncid_frm->stateless_reset_token = *pos;
*pos += QUIC_STATELESS_RESET_TOKEN_LEN;
return 1;
}
/* Encode a RETIRE_CONNECTION_ID frame at <pos> buffer position.
* Returns 1 if succeeded (enough room at <pos> buffer position to encode the frame), 0 if not.
*/
static int quic_build_retire_connection_id_frame(unsigned char **pos, const unsigned char *end,
struct quic_frame *frm, struct quic_conn *conn)
{
struct qf_retire_connection_id *rcid_frm = &frm->retire_connection_id;
return quic_enc_int(pos, end, rcid_frm->seq_num);
}
/* Parse a RETIRE_CONNECTION_ID frame at <pos> buffer position 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 **pos, const unsigned char *end)
{
struct qf_retire_connection_id *rcid_frm = &frm->retire_connection_id;
return quic_dec_int(&rcid_frm->seq_num, pos, end);
}
/* Encode a PATH_CHALLENGE frame at <pos> buffer position.
* Returns 1 if succeeded (enough room at <pos> buffer position to encode the frame), 0 if not.
*/
static int quic_build_path_challenge_frame(unsigned char **pos, const unsigned char *end,
struct quic_frame *frm, struct quic_conn *conn)
{
struct qf_path_challenge *pc_frm = &frm->path_challenge;
if (end - *pos < sizeof pc_frm->data)
return 0;
memcpy(*pos, pc_frm->data, sizeof pc_frm->data);
*pos += sizeof pc_frm->data;
return 1;
}
/* Parse a PATH_CHALLENGE frame at <pos> buffer position with <end> as end into <frm> frame.
* Return 1 if succeeded (enough room at <pos> buffer position 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 **pos, const unsigned char *end)
{
struct qf_path_challenge *pc_frm = &frm->path_challenge;
if (end - *pos < sizeof pc_frm->data)
return 0;
memcpy(pc_frm->data, *pos, sizeof pc_frm->data);
*pos += sizeof pc_frm->data;
return 1;
}
/* Encode a PATH_RESPONSE frame at <pos> buffer position.
* Returns 1 if succeeded (enough room at <pos> buffer position to encode the frame), 0 if not.
*/
static int quic_build_path_response_frame(unsigned char **pos, const unsigned char *end,
struct quic_frame *frm, struct quic_conn *conn)
{
struct qf_path_challenge_response *pcr_frm = &frm->path_challenge_response;
if (end - *pos < sizeof pcr_frm->data)
return 0;
memcpy(*pos, pcr_frm->data, sizeof pcr_frm->data);
*pos += sizeof pcr_frm->data;
return 1;
}
/* Parse a PATH_RESPONSE frame at <pos> buffer position with <end> as end into <frm> frame.
* Return 1 if succeeded (enough room at <pos> buffer position 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 **pos, const unsigned char *end)
{
struct qf_path_challenge_response *pcr_frm = &frm->path_challenge_response;
if (end - *pos < sizeof pcr_frm->data)
return 0;
memcpy(pcr_frm->data, *pos, sizeof pcr_frm->data);
*pos += sizeof pcr_frm->data;
return 1;
}
/* Encode a CONNECTION_CLOSE frame at QUIC layer at <pos> buffer position.
* 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 at <pos> buffer position to encode the frame), 0 if not.
*/
static int quic_build_connection_close_frame(unsigned char **pos, const unsigned char *end,
struct quic_frame *frm, struct quic_conn *conn)
{
struct qf_connection_close *cc_frm = &frm->connection_close;
if (!quic_enc_int(pos, end, cc_frm->error_code) ||
!quic_enc_int(pos, end, cc_frm->frame_type) ||
!quic_enc_int(pos, end, cc_frm->reason_phrase_len) ||
end - *pos < cc_frm->reason_phrase_len)
return 0;
memcpy(*pos, cc_frm->reason_phrase, cc_frm->reason_phrase_len);
*pos += cc_frm->reason_phrase_len;
return 1;
}
/* Parse a CONNECTION_CLOSE frame at QUIC layer at <pos> buffer position 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 at <pos> buffer position 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 **pos, const unsigned char *end)
{
size_t plen;
struct qf_connection_close *cc_frm = &frm->connection_close;
if (!quic_dec_int(&cc_frm->error_code, pos, end) ||
!quic_dec_int(&cc_frm->frame_type, pos, end) ||
!quic_dec_int(&cc_frm->reason_phrase_len, pos, end) ||
end - *pos < cc_frm->reason_phrase_len)
return 0;
plen = QUIC_MIN((size_t)cc_frm->reason_phrase_len, sizeof cc_frm->reason_phrase);
memcpy(cc_frm->reason_phrase, *pos, plen);
*pos += cc_frm->reason_phrase_len;
return 1;
}
/* Encode a CONNECTION_CLOSE frame at application layer at <pos> buffer position.
* Note there exist two types of CONNECTION_CLOSE frame, one for application layer
* and another at QUIC layer.
* Returns 1 if succeeded (enough room at <pos> buffer position to encode the frame), 0 if not.
*/
static int quic_build_connection_close_app_frame(unsigned char **pos, const unsigned char *end,
struct quic_frame *frm, struct quic_conn *conn)
{
struct qf_connection_close_app *cc_frm = &frm->connection_close_app;
if (!quic_enc_int(pos, end, cc_frm->error_code) ||
!quic_enc_int(pos, end, cc_frm->reason_phrase_len) ||
end - *pos < cc_frm->reason_phrase_len)
return 0;
memcpy(*pos, cc_frm->reason_phrase, cc_frm->reason_phrase_len);
*pos += cc_frm->reason_phrase_len;
return 1;
}
/* Parse a CONNECTION_CLOSE frame at QUIC layer at <pos> buffer position 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 at <pos> buffer position 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 **pos, const unsigned char *end)
{
size_t plen;
struct qf_connection_close_app *cc_frm = &frm->connection_close_app;
if (!quic_dec_int(&cc_frm->error_code, pos, end) ||
!quic_dec_int(&cc_frm->reason_phrase_len, pos, end) ||
end - *pos < cc_frm->reason_phrase_len)
return 0;
plen = QUIC_MIN((size_t)cc_frm->reason_phrase_len, sizeof cc_frm->reason_phrase);
memcpy(cc_frm->reason_phrase, *pos, plen);
*pos += cc_frm->reason_phrase_len;
return 1;
}
/* Encode a HANDSHAKE_DONE frame at <pos> buffer position.
* Always succeeds.
*/
static int quic_build_handshake_done_frame(unsigned char **pos, const unsigned char *end,
struct quic_frame *frm, struct quic_conn *conn)
{
/* No field */
return 1;
}
/* Parse a HANDSHAKE_DONE frame at QUIC layer at <pos> buffer position 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 **pos, const unsigned char *end)
{
/* No field */
return 1;
}
struct quic_frame_builder {
int (*func)(unsigned char **pos, const unsigned char *end,
struct quic_frame *frm, struct quic_conn *conn);
uint32_t mask;
unsigned char flags;
};
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 **pos, const unsigned char *end);
uint32_t mask;
unsigned char flags;
};
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 at <pos> buffer position into <frm> frame.
* Returns 1 if succeeded (enough data at <pos> buffer position to parse the frame), 0 if not.
*/
int qc_parse_frm(struct quic_frame *frm, struct quic_rx_packet *pkt,
const unsigned char **pos, const unsigned char *end,
struct quic_conn *qc)
{
int ret = 0;
const struct quic_frame_parser *parser;
TRACE_ENTER(QUIC_EV_CONN_PRSFRM, qc);
if (end <= *pos) {
TRACE_DEVEL("wrong frame", QUIC_EV_CONN_PRSFRM, qc);
goto leave;
}
frm->type = *(*pos)++;
if (frm->type >= QUIC_FT_MAX) {
TRACE_DEVEL("wrong frame type", QUIC_EV_CONN_PRSFRM, qc, frm);
goto leave;
}
parser = &quic_frame_parsers[frm->type];
if (!(parser->mask & (1U << pkt->type))) {
TRACE_DEVEL("unauthorized frame", QUIC_EV_CONN_PRSFRM, qc, frm);
goto leave;
}
if (!parser->func(frm, qc, pos, end)) {
TRACE_DEVEL("parsing error", QUIC_EV_CONN_PRSFRM, qc, frm);
goto leave;
}
TRACE_PROTO("RX frm", QUIC_EV_CONN_PSTRM, qc, frm);
pkt->flags |= parser->flags;
ret = 1;
leave:
TRACE_LEAVE(QUIC_EV_CONN_PRSFRM, qc);
return ret;
}
/* Encode <frm> QUIC frame at <pos> buffer position.
* Returns 1 if succeeded (enough room at <pos> buffer position to encode the frame), 0 if not.
* The buffer is updated to point to one byte past the end of the built frame
* only if succeeded.
*/
int qc_build_frm(unsigned char **pos, const unsigned char *end,
struct quic_frame *frm, struct quic_tx_packet *pkt,
struct quic_conn *qc)
{
int ret = 0;
const struct quic_frame_builder *builder;
unsigned char *p = *pos;
TRACE_ENTER(QUIC_EV_CONN_BFRM, qc);
builder = &quic_frame_builders[frm->type];
if (!(builder->mask & (1U << pkt->type))) {
/* XXX This it a bug to send an unauthorized frame with such a packet type XXX */
TRACE_ERROR("unauthorized frame", QUIC_EV_CONN_BFRM, qc, frm);
BUG_ON(!(builder->mask & (1U << pkt->type)));
}
if (end <= p) {
TRACE_DEVEL("not enough room", QUIC_EV_CONN_BFRM, qc, frm);
goto leave;
}
TRACE_PROTO("TX frm", QUIC_EV_CONN_BFRM, qc, frm);
*p++ = frm->type;
if (!quic_frame_builders[frm->type].func(&p, end, frm, qc)) {
TRACE_ERROR("frame building error", QUIC_EV_CONN_BFRM, qc, frm);
goto leave;
}
pkt->flags |= builder->flags;
*pos = p;
ret = 1;
leave:
TRACE_LEAVE(QUIC_EV_CONN_BFRM, qc);
return ret;
}
/* Detach all duplicated frames from <frm> reflist. */
void qc_frm_unref(struct quic_frame *frm, struct quic_conn *qc)
{
struct quic_frame *f, *tmp;
TRACE_ENTER(QUIC_EV_CONN_PRSAFRM, qc, frm);
list_for_each_entry_safe(f, tmp, &frm->reflist, ref) {
f->origin = NULL;
LIST_DEL_INIT(&f->ref);
if (f->pkt) {
TRACE_DEVEL("remove frame reference",
QUIC_EV_CONN_PRSAFRM, qc, f, &f->pkt->pn_node.key);
}
else {
TRACE_DEVEL("remove frame reference for unsent frame",
QUIC_EV_CONN_PRSAFRM, qc, f);
}
}
TRACE_LEAVE(QUIC_EV_CONN_PRSAFRM, qc);
}
/* Free a <frm> quic_frame. Remove it from parent element if still attached. */
void qc_frm_free(struct quic_conn *qc, struct quic_frame **frm)
{
TRACE_ENTER(QUIC_EV_CONN_PRSAFRM, qc, *frm);
/* Caller must ensure that no other frame points to <frm>. Use
* qc_frm_unref() to handle this properly.
*/
BUG_ON(!LIST_ISEMPTY(&((*frm)->reflist)));
BUG_ON(LIST_INLIST(&((*frm)->ref)));
/* TODO simplify frame deallocation. In some code paths, we must
* manually call this LIST_DEL_INIT before using
* quic_tx_packet_refdec() and freeing the frame.
*/
LIST_DEL_INIT(&((*frm)->list));
pool_free(pool_head_quic_frame, *frm);
*frm = NULL;
TRACE_LEAVE(QUIC_EV_CONN_PRSAFRM, qc);
}
/* Release <frm> frame and mark its copies as acknowledged */
void qc_release_frm(struct quic_conn *qc, struct quic_frame *frm)
{
uint64_t pn;
struct quic_frame *origin, *f, *tmp;
TRACE_ENTER(QUIC_EV_CONN_PRSAFRM, qc, frm);
/* Identify this frame: a frame copy or one of its copies */
origin = frm->origin ? frm->origin : frm;
/* Ensure the source of the copies is flagged as acked, <frm> being
* possibly a copy of <origin>
*/
origin->flags |= QUIC_FL_TX_FRAME_ACKED;
/* Mark all the copy of <origin> as acknowledged. We must
* not release the packets (releasing the frames) at this time as
* they are possibly also to be acknowledged alongside the
* the current one.
*/
list_for_each_entry_safe(f, tmp, &origin->reflist, ref) {
if (f->pkt) {
f->flags |= QUIC_FL_TX_FRAME_ACKED;
f->origin = NULL;
LIST_DEL_INIT(&f->ref);
pn = f->pkt->pn_node.key;
TRACE_DEVEL("mark frame as acked from packet",
QUIC_EV_CONN_PRSAFRM, qc, f, &pn);
}
else {
TRACE_DEVEL("freeing unsent frame",
QUIC_EV_CONN_PRSAFRM, qc, f);
LIST_DEL_INIT(&f->ref);
qc_frm_free(qc, &f);
}
}
LIST_DEL_INIT(&frm->list);
pn = frm->pkt->pn_node.key;
quic_tx_packet_refdec(frm->pkt);
TRACE_DEVEL("freeing frame from packet",
QUIC_EV_CONN_PRSAFRM, qc, frm, &pn);
qc_frm_free(qc, &frm);
TRACE_LEAVE(QUIC_EV_CONN_PRSAFRM, qc);
}
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