1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
|
#!/bin/bash
#
# test-wireless-scan
#
# Usage:
# test-wireless-scan IFACE [mac MACADDRESS] [essid ESSID]
#
# This tests whether an access point is in range [with the appropriate
# MAC address] [and appropriate ESSID] by looking at the output of
# "iwlist IFACE scan".
#
# MACADDRESS letters must be in upper case
#
# Licensed under the GNU GPL. See /usr/share/common-licenses/GPL.
#
# History
# Oct 2004: Written by Thomas Hood
set -o errexit # -e
set -o noglob # -f
MYNAME="$(basename $0)"
PATH=/sbin:/bin
report_err() { echo "${MYNAME}: Error: $*" >&2 ; }
do_sleep() { LANG=C sleep "$@" ; }
is_ethernet_mac()
{
[ "$1" ] && [ ! "${1/[0-9A-F][0-9A-F]:[0-9A-F][0-9A-F]:[0-9A-F][0-9A-F]:[0-9A-F][0-9A-F]:[0-9A-F][0-9A-F]:[0-9A-F][0-9A-F]/}" ]
}
IFACE="$1"
[ "$IFACE" ] || { report_err "Interface not specified. Exiting." ; exit 1 ; }
shift
while [ "$2" ] ; do
case "$1" in
mac)
is_ethernet_mac "$2" || { report_err "Argument of 'mac' is not a MAC address" ; exit 1 ; }
MAC_ADDRESS="$2"
;;
essid)
ESSID="$2"
;;
esac
shift 2
done
[ "$MAC_ADDRESS" ] || [ "$ESSID" ] || { report_err "Neither AP MAC address nor ESSID specified. Exiting." ; exit 1 ; }
ip link set "$IFACE" up
do_sleep 0.5
SCAN="$(iwlist "$IFACE" scan 2>&1)"
ip link set "$IFACE" down
shopt -s extglob # We need this to allow the ?( ) syntax in patterns
[ "$SCAN" = "${SCAN/Interface doesn?t support scanning/}" ] || exit 1
[ "$SCAN" = "${SCAN/Operation not supported/}" ] || exit 1
if [ "$MAC_ADDRESS" ] ; then
[ "$SCAN" != "${SCAN/Address:*( )$MAC_ADDRESS/}" ] || exit 1
fi
if [ "$ESSID" ] ; then
[ "$SCAN" != "${SCAN/ESSID:*( )?${ESSID}?/}" ] || exit 1
fi
exit 0
|
