Imported Upstream version 2.3_rc1

1 files changed, 0 insertions, 215 deletions

diff --git a/gremlin.c b/gremlin.c
deleted file mode 100644
index c7c0206..0000000
--- a/gremlin.c
+++ /dev/null
@@ -1,215 +0,0 @@
-/*
- *  OpenVPN -- An application to securely tunnel IP networks
- *             over a single UDP port, with support for SSL/TLS-based
- *             session authentication and key exchange,
- *             packet encryption, packet authentication, and
- *             packet compression.
- *
- *  Copyright (C) 2002-2010 OpenVPN Technologies, Inc. <sales@openvpn.net>
- *
- *  This program is free software; you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License version 2
- *  as published by the Free Software Foundation.
- *
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- *  GNU General Public License for more details.
- *
- *  You should have received a copy of the GNU General Public License
- *  along with this program (see the file COPYING included with this
- *  distribution); if not, write to the Free Software Foundation, Inc.,
- *  59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
- */
-
-/*
- * Test protocol robustness by simulating dropped packets and
- * network outages when the --gremlin option is used.
- */
-
-#include "syshead.h"
-
-#ifdef ENABLE_DEBUG
-
-#include "error.h"
-#include "common.h"
-#include "misc.h"
-#include "otime.h"
-#include "gremlin.h"
-
-#include "memdbg.h"
-
-/*
- * Parameters for packet corruption and droppage.
- * Each parameter has 4 possible levels, 0 = disabled,
- * while 1, 2, and 3 are enumerated in the below arrays.
- * The parameter is a 2-bit field within the --gremlin
- * parameter.
- */
-
-/*
- * Probability that we will drop a packet is 1 / n
- */
-static const int drop_freq[] = { 500, 100, 50 };
-
-/*
- * Probability that we will corrupt a packet is 1 / n
- */
-static const int corrupt_freq[] = { 500, 100, 50 };
-
-/*
- * When network goes up, it will be up for between
- * UP_LOW and UP_HIGH seconds.
- */
-static const int up_low[] =  {  60, 10,  5 };
-static const int up_high[] = { 600, 60, 10 };
-
-/*
- * When network goes down, it will be down for between
- * DOWN_LOW and DOWN_HIGH seconds.
- */
-static const int down_low[] =  {  5, 10,  10 };
-static const int down_high[] = { 10, 60, 120 };
-
-/*
- * Packet flood levels:
- *  { number of packets, packet size }
- */
-static const struct packet_flood_parms packet_flood_data[] =
-  {{10, 100}, {10, 1500}, {100, 1500}};
-
-struct packet_flood_parms
-get_packet_flood_parms (int level)
-{
-  ASSERT (level > 0 && level < 4);
-  return packet_flood_data [level - 1];
-}
-
-/*
- * Return true with probability 1/n
- */
-static bool flip(int n) {
-  return (get_random() % n) == 0;
-}
-
-/*
- * Return uniformly distributed random number between
- * low and high.
- */
-static int roll(int low, int high) {
-  int ret;
-  ASSERT (low <= high);
-  ret = low + (get_random() % (high - low + 1));
-  ASSERT (ret >= low && ret <= high);
-  return ret;
-}
-
-static bool initialized; /* GLOBAL */
-static bool up;          /* GLOBAL */
-static time_t next;      /* GLOBAL */
-
-/*
- * Return false if we should drop a packet.
- */
-bool
-ask_gremlin (int flags)
-{
-  const int up_down_level = GREMLIN_UP_DOWN_LEVEL (flags);
-  const int drop_level = GREMLIN_DROP_LEVEL (flags);
-
-  if (!initialized)
-    {
-      initialized = true;
-
-      if (up_down_level)
-	up = false;
-      else
-	up = true;
-
-      next = now;
-    }
-
-  if (up_down_level) /* change up/down state? */
-    {
-      if (now >= next)
-	{
-	  int delta;
-	  if (up)
-	    {
-	      delta = roll (down_low[up_down_level-1], down_high[up_down_level-1]);
-	      up = false;
-	    }
-	  else
-	    {
-	      delta = roll (up_low[up_down_level-1], up_high[up_down_level-1]);
-	      up = true;
-	    }
-      
-	  msg (D_GREMLIN,
-	       "GREMLIN: CONNECTION GOING %s FOR %d SECONDS",
-	       (up ? "UP" : "DOWN"),
-	       delta);
-	  next = now + delta;
-	}
-    }
-
-  if (drop_level)
-    {
-      if (up && flip (drop_freq[drop_level-1]))
-	{
-	  dmsg (D_GREMLIN_VERBOSE, "GREMLIN: Random packet drop");
-	  return false;
-	}
-    }
-
-  return up;
-}
-
-/*
- * Possibly corrupt a packet.
- */
-void corrupt_gremlin (struct buffer *buf, int flags) {
-  const int corrupt_level = GREMLIN_CORRUPT_LEVEL (flags);
-  if (corrupt_level)
-    {
-      if (flip (corrupt_freq[corrupt_level-1]))
-	{
-	  do
-	    {
-	      if (buf->len > 0)
-		{
-		  uint8_t r = roll (0, 255);
-		  int method = roll (0, 5);
-
-		  switch (method) {
-		  case 0: /* corrupt the first byte */
-		    *BPTR (buf) = r;
-		    break;
-		  case 1: /* corrupt the last byte */
-		    *(BPTR (buf) + buf->len - 1) = r;
-		    break;
-		  case 2: /* corrupt a random byte */
-		    *(BPTR(buf) + roll (0, buf->len - 1)) = r;
-		    break;
-		  case 3: /* append a random byte */
-		    buf_write (buf, &r, 1);
-		    break;
-		  case 4: /* reduce length by 1 */
-		    --buf->len;
-		    break;
-		  case 5: /* reduce length by a random amount */
-		    buf->len -= roll (0, buf->len - 1);
-		    break;
-		  }
-		  dmsg (D_GREMLIN_VERBOSE, "GREMLIN: Packet Corruption, method=%d", method);
-		}
-	      else
-		break;
-	    } while (flip (2)); /* a 50% chance we will corrupt again */
-	}
-    }
-}
-
-#else
-static void dummy(void) {}
-#endif