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|
#!/bin/bash
set -e
[ -n "$DEBUG" ] && set -x
print_gateway_uri=
print_time_diff=
print_json=
if=wlan0
debug=
while getopts djuhDI: opt; do
case "$opt" in
d) print_time_diff=1 ;;
j) print_json=1 ;;
u) print_gateway_uri=1 ;;
I) if=$OPTARG ;;
D) debug=1 ;;
h | ?)
printf "usage: hspl [options]\n"
printf "\n"
printf "supported hotspot vendors:\n"
printf " hotsplots.de (e.g. Espresso House / public libraries)\n"
printf " pbspot (e.g. CoffeeFellows)\n"
printf "\n"
printf "options:\n"
printf " -d print time until expiry in seconds\n"
printf " -j output json\n"
printf " -u print gateway address\n"
printf " -I use a specific interface (default: %s)\n" "$if"
printf " -D emit the html for debugging\n"
printf "\n"
exit 2
;;
esac
done
shift $((OPTIND - 1))
gateway=$(ip route show dev "$if" | awk '/default via/{print $3; exit}')
if [ -n "$print_gateway_uri" ]; then
echo "$gateway"
exit 0
fi
html=$(curl -Ls --interface "$if" "$gateway")
t=
tx=
rx=
logged_in=0
vendor=unknown
name=unknown
if [ -n "$debug" ]; then
echo "$html"
exit 1
fi
# hotspot vendor implementations go here:
if grep -q pbspot <<<"$html"; then
vendor=pbspot
# TODO: logged_in=$(grep -qi 'eingeloggt seit' && echo 1)
t=$(grep -i 'expires' <<<"$html" | awk -F 'td>' '{print $4}' | tr -d '</' | tr -d ':' | sed -e 's,s, seconds,' -e 's,m, minutes,')
t=${t:-unlimited}
tx=$(grep -i 'transmitted' <<<"$html" | awk -F 'td>' '{print $4}' | tr -d '</')
rx=$(grep -i 'received' <<<"$html" | awk -F 'td>' '{print $4}' | tr -d '</')
fi
if grep -q hotsplots <<<"$html"; then
vendor=hotsplots
html=$(sed 's,\/tr>,\/tr>\n,g' <<<"$html")
logged_in=$(grep -qi 'eingeloggt seit' <<<"$html" && echo 1 || echo 0)
t=$(grep -i 'verbleibende zeit' <<<"$html" | awk -F 'td>' '{print $3}' | tr -d '</' | sed -e 's, ,,' -e 's,h, hours,' -e 's,min, minutes,' -e 's,sec, seconds,')
t=${t:-unlimited}
tx=$(grep -i 'übertragene daten' <<<"$html" | awk -F 'td>' '{print $3}' | tr -d '</' | sed -e 's, ,,' -e 's, (.*),,')
rx="-"
name=$(grep -i 'loginHead' <<<"$html" | awk -F 'h2>' '{print $2}' | tr -d '</')
fi
# end of hotspot vendor implementations
if [ "$logged_in" -eq 0 ]; then
echo "not logged in" >&2
echo "open" "$gateway" "and complete hotspot sign in process" >&2
echo "" >&2
exit 1
fi
if [ -z "$t" ]; then
echo "no hotspot or unimplemented vendor" >&2
exit 1
fi
if [ "$t" != "unlimited" ]; then
expiry_time=$(date --date "now + $t" +%s)
remaining=$(((expiry_time - $(date +%s))))
if [ -n "$print_time_diff" ]; then
echo "$remaining"
exit 0
fi
# format remaining time like: 5h30m or 10s
remaining=$(awk '{
s=$0
h=(s/60/60);
if(h>1){ printf "%dh", h }
m=(s/60%60)
if(m>1){ printf "%dm", m }
if(h<1 && m<1){ printf "%ds", $0 }
}' <<<"$remaining")
else
remaining=$t
fi
if [ -n "$print_json" ]; then
jq -n --args '{
remaining:$ARGS.positional[0],
tx:$ARGS.positional[1],
rx:$ARGS.positional[2],
t:$ARGS.positional[3],
vendor:$ARGS.positional[4],
name:$ARGS.positional[5]
}' "$remaining" "$tx" "$rx" "$t" "$vendor" "$name"
else
echo "$remaining"
echo "TX:" "$tx"
echo "RX:" "$rx"
echo "[" "$name" "]"
fi
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