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
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
|
WPA_CLI="wpa_cli -p /run/wpa_supplicant"
# Uses wpa_supplicant to check for association to a network
# wpa_check interface [timeout]
wpa_check()
{
local timeout=0 INTERFACE="$1" TIMEOUT="${2:-15}" CONDITION="${3:-COMPLETED}"
# CONDITION is required as wired connections are ready at ASSOCIATED not COMPLETED FS#20150
while [[ $timeout -lt "$TIMEOUT" ]]; do
( # Sometimes wpa_supplicant isn't ready so silence errors for 2s only to avoid hiding real errors
if [[ $timeout -lt 2 ]]; then
eval $($WPA_CLI -i "$INTERFACE" status 2> /dev/null | fgrep "wpa_state=")
else
eval $($WPA_CLI -i "$INTERFACE" status | fgrep "wpa_state=")
fi
[[ "$wpa_state" = "$CONDITION" ]]
) && return 0
sleep 1
let timeout++
done
echo "$wpa_state"
# wpa_cli -i "$INTERFACE" terminate >/dev/null 2>&1 # callers sometimes called stop_wpa, which does more but seems redundant
# termination should either be handled properly here, or by callers
stop_wpa "$INTERFACE"
return 1
}
start_wpa()
{
local INTERFACE="$1" WPA_CONF="$2" WPA_DRIVER="$3"
shift 3
local WPA_OPTS="$*"
wpa_supplicant -B -P "/run/wpa_supplicant_${INTERFACE}.pid" -i "$INTERFACE" -D "$WPA_DRIVER" -c "$WPA_CONF" $WPA_OPTS
sleep 1
if [[ ! -f "/run/wpa_supplicant_${INTERFACE}.pid" ]]; then
return 1
fi
}
stop_wpa()
{
$WPA_CLI -i "$1" terminate &> /dev/null
sleep 1 # JP: need this else the file tends to disappear after [[ -f ... ]] but before cat...
# see <http://bbs.archlinux.org/viewtopic.php?pid=515667#p515667>
if [[ -f "/run/wpa_supplicant_$1.pid" ]]; then
kill "$(cat "/run/wpa_supplicant_$1.pid")" &>/dev/null &
fi
}
wpa_reconfigure() {
local INTERFACE=$1
$WPA_CLI -i "$INTERFACE" reconfigure
return $?
}
wpa_check_current_essid() {
# usage: wpa_check_current_essid $interface $essid
# check that wpa_supplicant is connected to the right essid
local INTERFACE=$1 ESSID=$2 status
status=$($WPA_CLI -i "$INTERFACE" status | grep "^ssid=")
if (( $? == 0 )) && [[ "$status" == "ssid=$ESSID" ]]; then
return 0
else
return 1
fi
}
wpa_find_essid() {
# usage: wpa_find_essid $INTERFACE $ESSID
# look for existence of a given essid. Assumes wpa_supplicant is
# running
result=$(wpa_supplicant_scan_and_find "$1" 5 "$2")
ret=$?
echo $result
report_debug wpa_find_essid "\"$result\""
return $ret
}
wpa_find_ap() {
# usage: wpa_find_essid $INTERFACE $ESSID
# look for existence of a given essid. Assumes wpa_supplicant is
# running
bssid=${2,,} # set to lowercase
result=$(wpa_supplicant_scan_and_find "$1" 1 "$bssid")
ret=$?
echo $result
report_debug wpa_find_ap "\"$result\""
return $ret
}
wpa_supplicant_scan_and_find() {
#usage: wpa_supplicant_scan_and_find $INTERFACE $FIELD $ITEM
# field = 1 for bssid, 5 for essid
# item = string to lookup
local INTERFACE="$1" FIELD="$2" ITEM="$3" RETRIES=5 try scan_ok
scan_ok=0
$WPA_CLI -i "$INTERFACE" scan &> /dev/null
for ((try=0; try < $RETRIES; try++)); do
local found
sleep 2
found=$($WPA_CLI -i "$INTERFACE" scan_results | tail -n+2 | cut -f ${FIELD} | grep -F -x -m 1 "${ITEM}")
(( $? == 0 )) && scan_ok=1
# ITEM has been found, echo it
if [[ -n "$found" ]]; then
echo "$found"
return 0
fi
$WPA_CLI -i "$INTERFACE" scan &> /dev/null
done
if (( $scan_ok != 1 )); then
report_debug wpa_supplicant_scan_and_find "unable to retrieve scan results"
fi
return 1
}
# Return a filename containing a list of network APs and ESSIDs found (sorted by decreasing signal strength)
# list_networks interface
list_networks() {
wpa_supplicant_scan_info "$1" 1,5
}
wpa_supplicant_scan_info() {
local INTERFACE="$1" fields="$2" essids
# temp file used, as keeping ESSID's with spaces in their name in arrays
# is hard, obscure and kinda nasty. This is simpler and clearer.
[[ -z "$INTERFACE" ]] && return 1
essids=$(mktemp --tmpdir essid.XXXXXXXX)
wpa_supplicant -B -i"$INTERFACE" -Dnl80211,wext -C/run/wpa_supplicant -P/run/wpa_supplicant.pid || return 1
$WPA_CLI -i "$INTERFACE" scan &> /dev/null
sleep 2.5
$WPA_CLI -i "$INTERFACE" scan_results |
grep -v "^Selected" |
grep -v "^bssid" |
sort -rn -k3 |
sort -u -k5 |
sort -rn -k3 |
cut -f"$fields" > "$essids"
# Fields are tab delimited
# Remove extraneous output from wpa_cli
# Sort by strength
# Remove duplicates
# Re-sort by strength as the removal disorders the list
# Cut to the AP/essid fields only
kill "$(cat /run/wpa_supplicant.pid)"
# File of 0 length, ie. no ssid's.
if [[ ! -s "$essids" ]]; then
rm -f "$essids"
return 1
fi
echo $essids
return 0
}
# Requires already loaded profile
make_wpa_config_file() {
local interface=$1
local WPA_CONF="$STATE_DIR/wpa.${interface}" # substitute spaces out
# make empty tmp dir with correct permissions, rename it
check_make_state_dir
# create symlink for old compatibility
mkdir -p /run/wpa_supplicant
if [ ! -e /var/run/wpa_supplicant ]; then
ln -s /run/wpa_supplicant /var/run
fi
rm -rf "$WPA_CONF"
mv -f "$(mktemp -d --tmpdir=$STATE_DIR)" "$WPA_CONF" || return 1
echo "ctrl_interface=/run/wpa_supplicant" >> "$WPA_CONF/wpa.conf" # we know $WPA_CONF now has no spaces, but it may have other nasty chars, so still needs to be quoted
echo "ctrl_interface_group=${WPA_GROUP:-wheel}" >> "$WPA_CONF/wpa.conf"
[[ $WPA_COUNTRY ]] && echo "country=$WPA_COUNTRY" >> "$WPA_CONF/wpa.conf"
[[ -n "$ADHOC" ]] && echo "ap_scan=2" >> "$WPA_CONF/wpa.conf"
echo "$WPA_CONF/wpa.conf"
}
# Requires already loaded profile
make_wpa_config() {
case $SECURITY in
wep|wep-old|wpa|none|none-old)
echo "ssid=\"$ESSID\""
if [[ -n "$AP" ]]; then
echo "bssid=${AP,,}"
fi
[[ -n "$ADHOC" ]] && echo "mode=1"
;;
wpa-configsection)
echo "$CONFIGSECTION"
;;
*)
return 1
;;
esac
# Key management
case $SECURITY in
wep|wep-old)
echo "key_mgmt=NONE"
echo "wep_tx_keyidx=0"
if [[ ${KEY:0:2} == "s:" ]]; then # TODO: does wpa_supplicant handle this as expected?
echo "wep_key0=\"${KEY:2}\""
else
echo "wep_key0=$KEY"
fi
;;
none|none-old)
echo "key_mgmt=NONE"
;;
wpa)
if [[ "${#KEY}" -eq 64 ]]; then
echo "proto=RSN WPA\npsk=$KEY"
else
echo "proto=RSN WPA\npsk=\"$KEY\""
fi
;;
esac
# Hidden SSID
if checkyesno ${HIDDEN:-no}; then
echo "scan_ssid=1"
fi
}
# vim: ft=sh ts=4 et sw=4 tw=0:
|
