Mercurial > hg > nginx
view src/event/quic/ngx_event_quic_protection.h @ 9196:6c8595b77e66
QUIC: path aware in-flight bytes accounting.
On-packet acknowledgement is made path aware, as per RFC 9000, Section 9.4:
Packets sent on the old path MUST NOT contribute to congestion control
or RTT estimation for the new path.
To make this possible in a single congestion control context, the first packet
to be sent after the new path has been validated, which includes resetting the
congestion controller and RTT estimator, is now remembered in the connection.
Packets sent previously, such as on the old path, are not taken into account.
Note that although the packet number is saved per-connection, the added checks
affect application level packets only. For non-application level packets,
which are only processed prior to the handshake is complete, the remembered
packet number remains set to zero.
author | Sergey Kandaurov <pluknet@nginx.com> |
---|---|
date | Tue, 12 Dec 2023 20:21:12 +0400 |
parents | 22d110af473c |
children |
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/* * Copyright (C) Nginx, Inc. */ #ifndef _NGX_EVENT_QUIC_PROTECTION_H_INCLUDED_ #define _NGX_EVENT_QUIC_PROTECTION_H_INCLUDED_ #include <ngx_config.h> #include <ngx_core.h> #include <ngx_event_quic_transport.h> #define NGX_QUIC_ENCRYPTION_LAST ((ssl_encryption_application) + 1) /* RFC 5116, 5.1/5.3 and RFC 8439, 2.3/2.5 for all supported ciphers */ #define NGX_QUIC_IV_LEN 12 #define NGX_QUIC_TAG_LEN 16 /* largest hash used in TLS is SHA-384 */ #define NGX_QUIC_MAX_MD_SIZE 48 #ifdef OPENSSL_IS_BORINGSSL #define ngx_quic_cipher_t EVP_AEAD #define ngx_quic_crypto_ctx_t EVP_AEAD_CTX #else #define ngx_quic_cipher_t EVP_CIPHER #define ngx_quic_crypto_ctx_t EVP_CIPHER_CTX #endif typedef struct { size_t len; u_char data[NGX_QUIC_MAX_MD_SIZE]; } ngx_quic_md_t; typedef struct { size_t len; u_char data[NGX_QUIC_IV_LEN]; } ngx_quic_iv_t; typedef struct { ngx_quic_md_t secret; ngx_quic_iv_t iv; ngx_quic_md_t hp; ngx_quic_crypto_ctx_t *ctx; EVP_CIPHER_CTX *hp_ctx; } ngx_quic_secret_t; typedef struct { ngx_quic_secret_t client; ngx_quic_secret_t server; } ngx_quic_secrets_t; struct ngx_quic_keys_s { ngx_quic_secrets_t secrets[NGX_QUIC_ENCRYPTION_LAST]; ngx_quic_secrets_t next_key; ngx_uint_t cipher; }; typedef struct { const ngx_quic_cipher_t *c; const EVP_CIPHER *hp; const EVP_MD *d; } ngx_quic_ciphers_t; typedef struct { size_t out_len; u_char *out; size_t prk_len; const uint8_t *prk; size_t label_len; const u_char *label; } ngx_quic_hkdf_t; #define ngx_quic_hkdf_set(seq, _label, _out, _prk) \ (seq)->out_len = (_out)->len; (seq)->out = (_out)->data; \ (seq)->prk_len = (_prk)->len, (seq)->prk = (_prk)->data, \ (seq)->label_len = (sizeof(_label) - 1); (seq)->label = (u_char *)(_label); ngx_int_t ngx_quic_keys_set_initial_secret(ngx_quic_keys_t *keys, ngx_str_t *secret, ngx_log_t *log); ngx_int_t ngx_quic_keys_set_encryption_secret(ngx_log_t *log, ngx_uint_t is_write, ngx_quic_keys_t *keys, enum ssl_encryption_level_t level, const SSL_CIPHER *cipher, const uint8_t *secret, size_t secret_len); ngx_uint_t ngx_quic_keys_available(ngx_quic_keys_t *keys, enum ssl_encryption_level_t level, ngx_uint_t is_write); void ngx_quic_keys_discard(ngx_quic_keys_t *keys, enum ssl_encryption_level_t level); void ngx_quic_keys_switch(ngx_connection_t *c, ngx_quic_keys_t *keys); void ngx_quic_keys_update(ngx_event_t *ev); void ngx_quic_keys_cleanup(ngx_quic_keys_t *keys); ngx_int_t ngx_quic_encrypt(ngx_quic_header_t *pkt, ngx_str_t *res); ngx_int_t ngx_quic_decrypt(ngx_quic_header_t *pkt, uint64_t *largest_pn); void ngx_quic_compute_nonce(u_char *nonce, size_t len, uint64_t pn); ngx_int_t ngx_quic_ciphers(ngx_uint_t id, ngx_quic_ciphers_t *ciphers); ngx_int_t ngx_quic_crypto_init(const ngx_quic_cipher_t *cipher, ngx_quic_secret_t *s, ngx_quic_md_t *key, ngx_int_t enc, ngx_log_t *log); ngx_int_t ngx_quic_crypto_seal(ngx_quic_secret_t *s, ngx_str_t *out, u_char *nonce, ngx_str_t *in, ngx_str_t *ad, ngx_log_t *log); void ngx_quic_crypto_cleanup(ngx_quic_secret_t *s); ngx_int_t ngx_quic_hkdf_expand(ngx_quic_hkdf_t *hkdf, const EVP_MD *digest, ngx_log_t *log); #endif /* _NGX_EVENT_QUIC_PROTECTION_H_INCLUDED_ */