X-Git-Url: https://www.tinc-vpn.org/git/browse?p=tinc;a=blobdiff_plain;f=src%2Fprotocol_misc.c;h=e1496294fe55d2b0764e0febca8ea3c4833e0f90;hp=25a86abe4ec0d62bd6440468662a7faade82b619;hb=c217d214f4f071c235bc7c463a1da6124e2570a6;hpb=eefa28059ab989c915a7d95fb4ae728abd7ce713

diff --git a/src/protocol_misc.c b/src/protocol_misc.c
index 25a86abe..e1496294 100644
--- a/src/protocol_misc.c
+++ b/src/protocol_misc.c
@@ -1,7 +1,7 @@
 /*
     protocol_misc.c -- handle the meta-protocol, miscellaneous functions
-    Copyright (C) 1999-2003 Ivo Timmermans <ivo@o2w.nl>,
-                  2000-2003 Guus Sliepen <guus@sliepen.eu.org>
+    Copyright (C) 1999-2005 Ivo Timmermans,
+                  2000-2009 Guus Sliepen <guus@tinc-vpn.org>
 
     This program is free software; you can redistribute it and/or modify
     it under the terms of the GNU General Public License as published by
@@ -16,8 +16,6 @@
     You should have received a copy of the GNU General Public License
     along with this program; if not, write to the Free Software
     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
-
-    $Id: protocol_misc.c,v 1.1.4.12 2003/07/22 20:55:20 guus Exp $
 */
 
 #include "system.h"
@@ -31,9 +29,11 @@
 #include "protocol.h"
 #include "utils.h"
 
+int maxoutbufsize = 0;
+
 /* Status and error notification routines */
 
-bool send_status(connection_t *c, int statusno, char *statusstring)
+bool send_status(connection_t *c, int statusno, const char *statusstring)
 {
 	cp();
 
@@ -62,7 +62,7 @@ bool status_h(connection_t *c)
 	return true;
 }
 
-bool send_error(connection_t *c, int err, char *errstring)
+bool send_error(connection_t *c, int err, const char *errstring)
 {
 	cp();
 
@@ -153,12 +153,16 @@ bool send_tcppacket(connection_t *c, vpn_packet_t *packet)
 {
 	cp();
 
-	/* Evil hack. */
+	/* If there already is a lot of data in the outbuf buffer, discard this packet.
+           We use a very simple Random Early Drop algorithm. */
+
+	if(2.0 * c->outbuflen / (float)maxoutbufsize - 1 > (float)rand()/(float)RAND_MAX)
+		return true;
 
 	if(!send_request(c, "%d %hd", PACKET, packet->len))
 		return false;
 
-	return send_meta(c, packet->data, packet->len);
+	return send_meta(c, (char *)packet->data, packet->len);
 }
 
 bool tcppacket_h(connection_t *c)