X-Git-Url: https://git.llucax.com/software/wpe.git/blobdiff_plain/519405f3b7a45197b8c3a934da82e4e8d033410b..HEAD:/rotate-key

diff --git a/rotate-key b/rotate-key
index 82ab5a9..c8385db 100644
--- a/rotate-key
+++ b/rotate-key
@@ -1,5 +1,8 @@
 #!/bin/sh
 
+# Copyleft 2006 - Leandro Lucarella <luca at llucax.com.ar>
+# This script is under the BOLA license, please see the LICENSE file.
+
 # Must edit
 ###########
 # Wireless interface
@@ -30,6 +33,10 @@ KEY_FORMAT="$KEY_BASE%D%p"
 KEY_SIZE=13
 # Hash command/algorithm used to compute the actual key
 HASH_PROG="sha1sum"
+# ifconfig path
+IFCONFIG="/sbin/ifconfig"
+# iwconfig path
+IWCONFIG="/sbin/iwconfig"
 
 # Do not touch
 ##############
@@ -37,10 +44,17 @@ HASH_PROG="sha1sum"
 
 export LANG=C
 
+# Check if interface exists
+if ! $IFCONFIG "$IFACE" > /dev/null 2>&1
+then
+  exit 0
+fi
+
 # Check if they are using our essid
 if [ -n "$ESSID" ]
 then
-  curr_essid=`iwconfig $IFACE | grep ESSID | sed 's/.*ESSID:"\([^"]\+\)".*/\1/'`
+  curr_essid=`$IWCONFIG $IFACE | grep ESSID \
+      | sed 's/.*ESSID:"\([^"]\+\)".*/\1/'`
   if [ "$curr_essid" != "$ESSID" ]
   then
     exit 0
@@ -55,12 +69,12 @@ key=`echo "$str" | $HASH_PROG | cut -c-$size`
 # Compute the new channel
 if [ -n "$ROTATE_CHANNEL" ]
 then
-  chan=`echo $key | tr abcdef 847502 | cut -c-6`
+  chan=1`echo $key | tr abcdef 847502 | cut -c-6`
   chan=$(($chan % $MAX_CHANNEL + 1))
   channel="channel $chan"
 fi
 
 # Commit changes
-/sbin/iwconfig $IFACE key $SECURITY_MODE $key $channel $COMMIT
+$IWCONFIG $IFACE key $SECURITY_MODE $key $channel $COMMIT
 
 # vim: set et sw=2 sts=2 :