Add TLS_FALLBACK_SCSV documentation, and move s_client -fallback_scsv

handling out of #ifndef OPENSSL_NO_DTLS1 section.

Reviewed-by: Rich Salz <[email protected]>

apps/s_client.c

@@ -942,10 +942,6 @@ static char *jpake_secret = NULL;
 			meth=DTLSv1_2_client_method();
 			socket_type=SOCK_DGRAM;
 			}
-		else if (strcmp(*argv,"-fallback_scsv") == 0)
-			{
-			fallback_scsv = 1;
-			}
 		else if (strcmp(*argv,"-timeout") == 0)
 			enable_timeouts=1;
 		else if (strcmp(*argv,"-mtu") == 0)
@@ -954,6 +950,10 @@ static char *jpake_secret = NULL;
 			socket_mtu = atol(*(++argv));
 			}
 #endif
+		else if (strcmp(*argv,"-fallback_scsv") == 0)
+			{
+			fallback_scsv = 1;
+			}
 		else if	(strcmp(*argv,"-keyform") == 0)
 			{
 			if (--argc < 1) goto bad;

doc/apps/s_client.pod

@@ -64,6 +64,9 @@ B<openssl> B<s_client>
 [B<-no_ssl2>]
 [B<-no_ssl3>]
 [B<-no_tls1>]
+[B<-no_tls1_1>]
+[B<-no_tls1_2>]
+[B<-fallback_scsv>]
 [B<-bugs>]
 [B<-cipher cipherlist>]
 [B<-serverpref>]
@@ -245,16 +248,19 @@ Use the PSK key B<key> when using a PSK cipher suite. The key is
 given as a hexadecimal number without leading 0x, for example -psk
 1a2b3c4d.
 
-=item B<-ssl2>, B<-ssl3>, B<-tls1>, B<-no_ssl2>, B<-no_ssl3>, B<-no_tls1>
+=item B<-ssl2>, B<-ssl3>, B<-tls1>, B<-no_ssl2>, B<-no_ssl3>, B<-no_tls1>, B<-no_tls1_1>, B<-no_tls1_2>
 
 these options disable the use of certain SSL or TLS protocols. By default
 the initial handshake uses a method which should be compatible with all
 servers and permit them to use SSL v3, SSL v2 or TLS as appropriate.
 
-Unfortunately there are a lot of ancient and broken servers in use which
+Unfortunately there are still ancient and broken servers in use which
 cannot handle this technique and will fail to connect. Some servers only
-work if TLS is turned off with the B<-no_tls> option others will only
-support SSL v2 and may need the B<-ssl2> option.
+work if TLS is turned off.
+
+=item B<-fallback_scsv>
+
+Send TLS_FALLBACK_SCSV in the ClientHello.
 
 =item B<-bugs>
 

doc/ssl/SSL_CTX_set_mode.pod

@@ -71,6 +71,12 @@ SSL_CTX->freelist_max_len, which defaults to 32.  Using this flag can
 save around 34k per idle SSL connection.
 This flag has no effect on SSL v2 connections, or on DTLS connections.
 
+=item SSL_MODE_FALLBACK_SCSV
+
+Send TLS_FALLBACK_SCSV in the ClientHello.
+To be set by applications that reconnect with a downgraded protocol
+version; see draft-ietf-tls-downgrade-scsv-00 for details.
+
 =back
 
 =head1 RETURN VALUES