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/*
* Copyright 2022-2023 The OpenSSL Project Authors. All Rights Reserved.
*
* Licensed under the Apache License 2.0 (the "License"). You may not use
* this file except in compliance with the License. You can obtain a copy
* in the file LICENSE in the source distribution or at
* https://www.openssl.org/source/license.html
*/
#ifndef OSSL_QUIC_TYPES_H
# define OSSL_QUIC_TYPES_H
# include <openssl/ssl.h>
# include <internal/ssl.h>
# include <assert.h>
# include <string.h>
# ifndef OPENSSL_NO_QUIC
/* QUIC encryption levels. */
enum {
QUIC_ENC_LEVEL_INITIAL = 0,
QUIC_ENC_LEVEL_HANDSHAKE,
QUIC_ENC_LEVEL_0RTT,
QUIC_ENC_LEVEL_1RTT,
QUIC_ENC_LEVEL_NUM /* Must be the ultimate entry */
};
/* QUIC packet number spaces. */
enum {
QUIC_PN_SPACE_INITIAL = 0,
QUIC_PN_SPACE_HANDSHAKE,
/* New entries must go here, so that QUIC_PN_SPACE_APP is the penultimate */
QUIC_PN_SPACE_APP,
QUIC_PN_SPACE_NUM /* Must be the ultimate entry */
};
static ossl_unused ossl_inline uint32_t
ossl_quic_enc_level_to_pn_space(uint32_t enc_level)
{
switch (enc_level) {
case QUIC_ENC_LEVEL_INITIAL:
return QUIC_PN_SPACE_INITIAL;
case QUIC_ENC_LEVEL_HANDSHAKE:
return QUIC_PN_SPACE_HANDSHAKE;
case QUIC_ENC_LEVEL_0RTT:
case QUIC_ENC_LEVEL_1RTT:
return QUIC_PN_SPACE_APP;
default:
assert(0);
return QUIC_PN_SPACE_APP;
}
}
/* QUIC packet number representation. */
typedef uint64_t QUIC_PN;
# define QUIC_PN_INVALID UINT64_MAX
static ossl_unused ossl_inline QUIC_PN ossl_quic_pn_max(QUIC_PN a, QUIC_PN b)
{
return a > b ? a : b;
}
static ossl_unused ossl_inline QUIC_PN ossl_quic_pn_min(QUIC_PN a, QUIC_PN b)
{
return a < b ? a : b;
}
static ossl_unused ossl_inline int ossl_quic_pn_valid(QUIC_PN pn)
{
return pn < (((QUIC_PN)1) << 62);
}
/* QUIC connection ID representation. */
# define QUIC_MAX_CONN_ID_LEN 20
# define QUIC_MIN_ODCID_LEN 8 /* RFC 9000 s. 7.2 */
typedef struct quic_conn_id_st {
unsigned char id_len, id[QUIC_MAX_CONN_ID_LEN];
} QUIC_CONN_ID;
static ossl_unused ossl_inline int ossl_quic_conn_id_eq(const QUIC_CONN_ID *a,
const QUIC_CONN_ID *b)
{
if (a->id_len != b->id_len || a->id_len > QUIC_MAX_CONN_ID_LEN)
return 0;
return memcmp(a->id, b->id, a->id_len) == 0;
}
/*
* Generates a random CID of the given length. libctx may be NULL.
* Returns 1 on success or 0 on failure.
*/
int ossl_quic_gen_rand_conn_id(OSSL_LIB_CTX *libctx, size_t len,
QUIC_CONN_ID *cid);
# define QUIC_MIN_INITIAL_DGRAM_LEN 1200
# define QUIC_DEFAULT_ACK_DELAY_EXP 3
# define QUIC_MAX_ACK_DELAY_EXP 20
# define QUIC_DEFAULT_MAX_ACK_DELAY 25
# define QUIC_MIN_ACTIVE_CONN_ID_LIMIT 2
/* Arbitrary choice of default idle timeout (not an RFC value). */
# define QUIC_DEFAULT_IDLE_TIMEOUT 30000
# define QUIC_STATELESS_RESET_TOKEN_LEN 16
typedef struct {
unsigned char token[QUIC_STATELESS_RESET_TOKEN_LEN];
} QUIC_STATELESS_RESET_TOKEN;
/*
* An encoded preferred_addr transport parameter cannot be shorter or longer
* than these lengths in bytes.
*/
# define QUIC_MIN_ENCODED_PREFERRED_ADDR_LEN 41
# define QUIC_MAX_ENCODED_PREFERRED_ADDR_LEN 61
# endif
#endif
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