Add mbedtls_ssl_get_max_frag_len()
This is not very useful for TLS as mbedtls_ssl_write() will automatically
fragment and return the length used, and the application should check for that
anyway, but this is useful for DTLS where mbedtls_ssl_write() returns an
error, and the application needs to be able to query the maximum length
instead of just guessing.
diff --git a/programs/ssl/ssl_server2.c b/programs/ssl/ssl_server2.c
index 3aa05d5..e4940b8 100644
--- a/programs/ssl/ssl_server2.c
+++ b/programs/ssl/ssl_server2.c
@@ -1946,6 +1946,11 @@
else
mbedtls_printf( " [ Record expansion is unknown (compression) ]\n" );
+#if defined(MBEDTLS_SSL_MAX_FRAGMENT_LENGTH)
+ mbedtls_printf( " [ Maximum fragment length is %u ]\n",
+ (unsigned int) mbedtls_ssl_get_max_frag_len( &ssl ) );
+#endif
+
#if defined(MBEDTLS_SSL_ALPN)
if( opt.alpn_string != NULL )
{