initial commit (extracted from FFJ buildchain)HEADmaster

1 files changed, 54 insertions, 0 deletions

diff --git a/geolocate b/geolocate
new file mode 100755
index 0000000..130d993
--- /dev/null
+++ b/geolocate
@@ -0,0 +1,54 @@
+#!/bin/sh -ex
+
+device=wlan0-1
+tmp=/tmp/geolocate_scratch
+
+# obtain an exclusive lock
+exec 666>>/tmp/lock/geolocate
+flock -w 5 -x 666;
+
+# list neighbour wifis
+iw dev $device scan >$tmp.scan
+
+# construct HTTP request
+(   echo -n '{"request_address": true, "version": "1.1.0", "wifi_towers": ['
+    egrep <$tmp.scan -o -e '^BSS [0-9a-f:]{17}' -e '^[[:space:]]SSID.*' -e '^[[:space:]]signal: [0-9.-]*' \
+	| tr "\n\t" " " \
+	| sed 's/BSS /\n/g' \
+	| tail -n +2 \
+	| cut -d' ' -f1,4,7- \
+	| sed 's/^\([^ ]*\) \([^ ]*\) \(.*\) $/{"mac_address":"\1", "signal_strength":"\2", "ssid":"\3"}/' \
+	| tr "\n" , \
+	| sed 's/,$//'
+    echo ']}'
+) >$tmp.json
+(   echo "POST /loc/json HTTP/1.0
+Content-length: $(wc -c <$tmp.json)
+"
+    cat $tmp.json
+) >$tmp.request
+
+# consult the ooracle
+nc www.google.com 80 <$tmp.request >$tmp.response
+
+# parse the response
+tail -n1 $tmp.response \
+    | tr , "\n" \
+    | egrep -o -e '"latitude":[0-9.]*' -e '"longitude":[0-9.]*' -e '"street":"[^"]*' \
+    | sort \
+    | egrep -o '[^:"]*$' \
+    | {
+	read lon
+	read lat
+	read street
+
+# store result
+	uci batch <<EOF
+set system.position.lon=$lon
+set system.position.lat=$lat
+set system.position.street="$street"
+EOF
+}
+
+# clean up
+rm $tmp*