commit 87a346f64e0d73522c17c22c5f4982c291d52641
author Manuel Pégourié-Gonnard <manuel.pegourie-gonnard@arm.com> Wed Sep 13 12:45:21 2017 +0200
committer Manuel Pégourié-Gonnard <manuel.pegourie-gonnard@arm.com> Thu Aug 16 10:01:10 2018 +0200
tree f3222e9721cbc8381c8a554253b7b385255e6cc2
parent 9c3a8caa928d2ea1679f3ec088b5afcfc533c185

Always save flight first, (re)send later

This will allow fragmentation to always happen in the same place, always from
a buffer distinct from ssl->out_msg, and with the same way of resuming after
returning WANT_WRITE

library/ssl_cli.c

diff --git a/library/ssl_cli.c b/library/ssl_cli.c
index 253c81f..4b17dea 100644
--- a/library/ssl_cli.c
+++ b/library/ssl_cli.c
@@ -1094,6 +1094,15 @@
         return( ret );
     }
 
+#if defined(MBEDTLS_SSL_PROTO_DTLS)
+    if( ssl->conf->transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM &&
+        ( ret = mbedtls_ssl_flight_transmit( ssl ) ) != 0 )
+    {
+        MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_flight_transmit", ret );
+        return( ret );
+    }
+#endif
+
     MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= write client hello" ) );
 
     return( 0 );
@@ -3402,7 +3411,7 @@
     if( ssl->conf->transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM &&
         ssl->handshake->retransmit_state == MBEDTLS_SSL_RETRANS_SENDING )
     {
-        if( ( ret = mbedtls_ssl_resend( ssl ) ) != 0 )
+        if( ( ret = mbedtls_ssl_flight_transmit( ssl ) ) != 0 )
             return( ret );
     }
 #endif