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Rename mbedtls_ssl_session minor_ver to tls_version

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Store the TLS version instead of minor version number in tls_version.

Note: struct member size changed from unsigned char to uint16_t
Due to standard structure padding, the structure size does not change
unless alignment is 1-byte (instead of 2-byte or more)

Note: existing application use which accesses the struct member
(using MBEDTLS_PRIVATE) is compatible on little-endian platforms,
but not compatible on big-endian platforms.  The enum values for
the lower byte of MBEDTLS_SSL_VERSION_TLS1_2 and of
MBEDTLS_SSL_VERSION_TLS1_3 matches MBEDTLS_SSL_MINOR_VERSION_3 and
MBEDTLS_SSL_MINOR_VERSION_4, respectively.

Note: care has been taken to preserve serialized session format,
which uses only the lower byte of the TLS version.

Signed-off-by: Glenn Strauss <gstrauss@gluelogic.com>
This commit is contained in:
Glenn Strauss
2022-03-14 13:29:48 -04:00
parent 07c641605e
commit da7851c825
6 changed files with 18 additions and 19 deletions
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7
include/mbedtls/ssl.h
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@ -1126,11 +1126,10 @@ struct mbedtls_ssl_session
unsigned char MBEDTLS_PRIVATE(exported);
/*!< Minor version negotiated in the session. Used if and when
* renegotiating or resuming a session instead of the configured minor
* version.
/*!< TLS version negotiated in the session. Used if and when renegotiating
* or resuming a session instead of the configured minor TLS version.
*/
unsigned char MBEDTLS_PRIVATE(minor_ver);
unsigned char MBEDTLS_PRIVATE(tls_version);
#if defined(MBEDTLS_HAVE_TIME)
mbedtls_time_t MBEDTLS_PRIVATE(start); /*!< starting time */