commit 7f376f4ece7a3e71a51c91f094fe99981ca6f46f
author Hanno Becker <hanno.becker@arm.com> Wed Jun 12 16:20:48 2019 +0100
committer Hanno Becker <hanno.becker@arm.com> Tue Jun 25 08:43:31 2019 +0100
tree c98a972eedc0169732f9c79ae67979aaaee588b8
parent af5ab918d92313c938a5628aa6e24fd3a288353c

Allow compile-time configuration of DTLS anti replay

Introduce MBEDTLS_SSL_CONF_ANTI_REPLAY to allow configuring
the use/nonuse of DTLS anti replay protection at compile-time.

Impact on code-size, measured with
> ./scripts/baremetal.sh --rom --gcc --armc5 --armc6

|  | GCC | ARMC5 | ARMC6 |
| --- | --- | --- | --- |
| `libmbedtls.a` before | 23559 | 24089 | 27921 |
| `libmbedtls.a` after  | 23511 | 24049 | 27903 |
| gain in Bytes | 48 | 40 | 18 |

programs/ssl/query_config.c

diff --git a/programs/ssl/query_config.c b/programs/ssl/query_config.c
index d45a663..35b3fe9 100644
--- a/programs/ssl/query_config.c
+++ b/programs/ssl/query_config.c
@@ -2578,6 +2578,14 @@
     }
 #endif /* MBEDTLS_PLATFORM_GMTIME_R_ALT */
 
+#if defined(MBEDTLS_SSL_CONF_ANTI_REPLAY)
+    if( strcmp( "MBEDTLS_SSL_CONF_ANTI_REPLAY", config ) == 0 )
+    {
+        MACRO_EXPANSION_TO_STR( MBEDTLS_SSL_CONF_ANTI_REPLAY );
+        return( 0 );
+    }
+#endif /* MBEDTLS_SSL_CONF_ANTI_REPLAY */
+
 #if defined(MBEDTLS_SSL_CONF_EXTENDED_MASTER_SECRET)
     if( strcmp( "MBEDTLS_SSL_CONF_EXTENDED_MASTER_SECRET", config ) == 0 )
     {