From 0d23cf157a7920a899cae6a346f734f7474e13be Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Jonas=20Bone=CC=81r?= <jonasremove@jonasboner.com>
Date: Fri, 25 Mar 2011 16:09:44 +0100
Subject: [PATCH] added script to simulate network failure scenarios and
 restore original settings

---
 scripts/ip-mod.sh | 31 +++++++++++++++++++++++++++++++
 1 file changed, 31 insertions(+)
 create mode 100755 scripts/ip-mod.sh

diff --git a/scripts/ip-mod.sh b/scripts/ip-mod.sh
new file mode 100755
index 0000000000..e9b509ae59
--- /dev/null
+++ b/scripts/ip-mod.sh
@@ -0,0 +1,31 @@
+#!/bin/sh
+
+# flush rules
+ipfw del pipe 1
+ipfw del pipe 2
+ipfw -q -f flush
+ipfw -q -f pipe flush
+
+if [ "$1" == "" ]; then
+    echo "Options: ip-mod.sh slow"
+    echo "         ip-mod.sh block"
+    echo "         ip-mod.sh reset"
+    echo "         ip-mod.sh restore"
+    exit
+elif [ "$1" == "restore" ]; then
+    echo "restoring normal network"
+    exit
+elif [ "$1" == "slow" ]; then
+    # simulate slow connection <to specific hosts>
+    echo "enabling slow connection"
+    ipfw add pipe 1 ip from any to any
+    ipfw add pipe 2 ip from any to any
+    ipfw pipe 1 config bw 60KByte/s delay 350ms
+    ipfw pipe 2 config bw 60KByte/s delay 350ms
+elif [ "$1" == "block" ]; then
+    echo "enabling blocked connections"
+    ipfw add 1 deny tcp from any to any 1024-65535
+elif [ "$1" == "reset" ]; then
+    echo "enabling reset connections"
+    ipfw add 1 reset tcp from any to any 1024-65535
+fi