commit a58a89617236afb724d7dc0ef9393d906b0c8133
author Hanno Becker <hanno.becker@arm.com> Thu Jun 13 16:11:15 2019 +0100
committer Hanno Becker <hanno.becker@arm.com> Thu Jul 04 10:28:55 2019 +0100
tree 9fc13aefd315097bd1e7bb75255e31372a43c61b
parent ece325c8dd0e4fb1847b92530bfaaddc88e8d467

Allow compile-time configuration of I/O function pointers

Introduce the compile-time options
- MBEDTLS_SSL_CONF_RECV
- MBEDTLS_SSL_CONF_SEND
- MBEDTLS_SSL_CONF_RECV_TIMEOUT
which can be used to configure the callbacks for the underlying
transport at compile-time.

Code-size impact:

|  | GCC 8.2.1 | ARMC5 5.06 | ARMC6 6.12 |
| --- | --- | --- | --- |
| `libmbedtls.a` before | 23471 | 24077 | 27045 |
| `libmbedtls.a` before | 23379 | 23981 | 26941 |
| gain in Bytes | 92 | 96 | 104 |

programs/ssl/query_config.c

diff --git a/programs/ssl/query_config.c b/programs/ssl/query_config.c
index 6d2b67b..a4881df 100644
--- a/programs/ssl/query_config.c
+++ b/programs/ssl/query_config.c
@@ -2706,6 +2706,30 @@
     }
 #endif /* MBEDTLS_SSL_CONF_IGNORE_UNEXPECTED_CID */
 
+#if defined(MBEDTLS_SSL_CONF_RECV)
+    if( strcmp( "MBEDTLS_SSL_CONF_RECV", config ) == 0 )
+    {
+        MACRO_EXPANSION_TO_STR( MBEDTLS_SSL_CONF_RECV );
+        return( 0 );
+    }
+#endif /* MBEDTLS_SSL_CONF_RECV */
+
+#if defined(MBEDTLS_SSL_CONF_SEND)
+    if( strcmp( "MBEDTLS_SSL_CONF_SEND", config ) == 0 )
+    {
+        MACRO_EXPANSION_TO_STR( MBEDTLS_SSL_CONF_SEND );
+        return( 0 );
+    }
+#endif /* MBEDTLS_SSL_CONF_SEND */
+
+#if defined(MBEDTLS_SSL_CONF_RECV_TIMEOUT)
+    if( strcmp( "MBEDTLS_SSL_CONF_RECV_TIMEOUT", config ) == 0 )
+    {
+        MACRO_EXPANSION_TO_STR( MBEDTLS_SSL_CONF_RECV_TIMEOUT );
+        return( 0 );
+    }
+#endif /* MBEDTLS_SSL_CONF_RECV_TIMEOUT */
+
 #if defined(MBEDTLS_SSL_CONF_RNG)
     if( strcmp( "MBEDTLS_SSL_CONF_RNG", config ) == 0 )
     {