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Expand documentation of internal mbedtls_record structure

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Hanno Becker 2019-07-11 09:24:36 +01:00
parent 37cfe73c92
commit d840cea4a1
1 changed files with 20 additions and 9 deletions
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29
include/mbedtls/ssl_internal.h
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@ -672,18 +672,29 @@ struct mbedtls_ssl_transform
typedef struct typedef struct
{ {
uint8_t ctr[8]; /* Record sequence number */ uint8_t ctr[8]; /* In TLS: The implicit record sequence number.
uint8_t type; /* Record type */ * In DTLS: The 2-byte epoch followed by
uint8_t ver[2]; /* SSL/TLS version */ * the 6-byte sequence number.
* This is stored as a raw big endian byte array
* as opposed to a uint64_t because we rarely
* need to perform arithmetic on this, but do
* need it as a Byte array for the purpose of
* MAC computations. */
uint8_t type; /* The record content type. */
uint8_t ver[2]; /* SSL/TLS version as present on the wire.
* Convert to internal presentation of versions
* using mbedtls_ssl_read_version() and
* mbedtls_ssl_write_version().
* Keep wire-format for MAC computations. */
unsigned char *buf; /* Memory buffer enclosing the record content */ unsigned char *buf; /* Memory buffer enclosing the record content */
size_t buf_len; /* Buffer length */ size_t buf_len; /* Buffer length */
size_t data_offset; /* Offset of record content */ size_t data_offset; /* Offset of record content */
size_t data_len; /* Length of record content */ size_t data_len; /* Length of record content */
#if defined(MBEDTLS_SSL_DTLS_CONNECTION_ID) #if defined(MBEDTLS_SSL_DTLS_CONNECTION_ID)
uint8_t cid_len; /* Length of the CID (0 if not present) */ uint8_t cid_len; /* Length of the CID (0 if not present) */
unsigned char cid[ MBEDTLS_SSL_CID_LEN_MAX ]; /* The CID */ unsigned char cid[ MBEDTLS_SSL_CID_LEN_MAX ]; /* The CID */
#endif /* MBEDTLS_SSL_DTLS_CONNECTION_ID */ #endif /* MBEDTLS_SSL_DTLS_CONNECTION_ID */
} mbedtls_record; } mbedtls_record;