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Updated to V1.5
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@facelessfish
facelessfish authored Oct 29, 2024
1 parent 4ee5c05 commit e88b136
Showing 1 changed file with 88 additions and 46 deletions.
134 changes: 88 additions & 46 deletions dhcpd-leasesd
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Original file line number Diff line number Diff line change
@@ -1,5 +1,5 @@
#!/bin/sh
version='1.4'
version='1.5'
# Copyright (c) 2022 Dinos Costanti <dinos@lab02.org>
# https://github.com/facelessfish/dhcpd-leasesd
#
Expand All @@ -22,11 +22,12 @@ listen='127.0.0.1'
port='9130'
leases_db='/var/db/dhcpd.leases'
dhcpd_conf='/etc/dhcpd.conf'
log_file='/tmp/dhcpd_leases.log'
fifo='/tmp/dhcpd_leases_http'

oui_tmp='/tmp/oui'
oui_db='oui_ieee_'
oui_downloading='/tmp/oui/downloading'
oui_downloading="${oui_tmp}/downloading"
oui_server='standards-oui.ieee.org'

css='inc/styles.css'
Expand All @@ -44,6 +45,19 @@ opt_server=false
opt_header=false



# Print on terminal if exists, else log
if [ -t 0 ]; then
function lprint {
print -n $1
}
else
function lprint {
print -n $1 >> $log_file
}
fi


# IP functions
function ip_to_int {
IFS='.'; set -- $1
Expand All @@ -69,7 +83,7 @@ function oui_update {
fi
> ${oui_downloading}
progress=0
print "$(date '+%H:%M:%S') Downloading from https://${oui_server}"
lprint "$(date '+%Y-%m-%d %H:%M:%S') Downloading from https://${oui_server}\n"
typeset -l index

print "GET / HTTP/1.1\nHost: ${oui_server}\nConnection: close\r\n" | nc -w 60 -c standards-oui.ieee.org 443 \
Expand All @@ -82,59 +96,91 @@ function oui_update {

let progress=$progress+1
if [ $(($progress % 300)) -eq 0 ]; then
print -n '.'
lprint '.'
fi
done

set -A vendors $(cat $oui_tmp/* | wc -l)
print "\n${vendors[0]} Vendors"
if [ $vendors -lt 34000 ]; then
lprint "\n${vendors[0]} Vendors\n"
if [ $vendors -lt 36300 ]; then
rm ${oui_tmp}/* 2>/dev/null || [[ $? == 1 ]]
print "$(date '+%H:%M:%S') Oui download interrupted. Incomplete data deleted."
lprint "$(date '+%Y-%m-%d %H:%M:%S') Oui download interrupted. Incomplete data deleted.\n"
else
rm ${oui_downloading} 2>/dev/null || [[ $? == 1 ]]
print "$(date '+%H:%M:%S') Finished."
lprint "$(date '+%Y-%m-%d %H:%M:%S') Finished.\n"
fi
fi
}


function oui_lookup {
IFS=':'; set -- $1; unset IFS
oui_data=$(grep -iF -m 1 ${1}-${2}-${3} ${oui_tmp}/${oui_db}${1%"${1#?}"}.csv 2>/dev/null) || true
if [ ! "$oui_data" = '' ]; then
print "${oui_data#*'|'}"
fi
}


function dhcpd_conf_parse {
IFS="${IFS};"
typeset -U ips
subnet_ips=0
ranges='<br>'
first=false
subnets=''; typeset -U ips; subnet_ips=0; ranges='<br>'
hosts=''; host=''; fixed_address=''; hardware=''; vendor=''

while read -r line; do
row="${line%'#'*}"
if [ ! "$row" = '' ]; then
if [ ! "${row}" = '' ]; then
set -A row_data $row
case "${row_data[0]}" in
'subnet' )
if $first; then
print "<div class=\"bar_bg\"><div class=\"bar_fg\"></div></div><p>IPs:<span class=\"s_ips\">${subnet_ips}</span> Leased:<span class=\"s_leased\">0</span>(<span class=\"s_leased_percent\">0</span>)${ranges}</p></div>"
subnet_ips=0;
ranges='<br>'
# data for prev subnet if exists
if [ ! "${subnets}" = '' ]; then
subnets="${subnets}<div class=\"bar_bg\"><div class=\"bar_fg\"></div></div><p>IPs:<span class=\"s_ips\">${subnet_ips}</span> Leased:<span class=\"s_leased\">0</span>(<span class=\"s_leased_percent\">0%</span>) Fixed:<span class=\"s_fixed\">0</span>${ranges}</p></div>"
subnet_ips=0; ranges='<br>'
fi
print "<div id="s_$(ip_to_int ${row_data[1]})"><input type=\"checkbox\" data-subnet=\"$(ip_to_int ${row_data[1]})\" data-mask=\"$(ip_to_int ${row_data[3]})\" checked><b>Subnet:</b><span>${row_data[1]}</span>/<span>$(mask_to_cidr ${row_data[3]})</span><br>"
first=true
# subnet header
subnets="${subnets}""<div id="s_$(ip_to_int ${row_data[1]})"><input type=\"checkbox\" data-subnet=\"$(ip_to_int ${row_data[1]})\" data-mask=\"$(ip_to_int ${row_data[3]})\" checked><b>Subnet:</b><span>${row_data[1]}</span>/<span>$(mask_to_cidr ${row_data[3]})</span><br>"
;;
'range' )
# ranges for current subnet
let ips=$(ip_to_int ${row_data[2]})-$(ip_to_int ${row_data[1]})+1
let subnet_ips=$subnet_ips+$ips;
ranges="${ranges}RG:<span>${row_data[1]}</span>-<span>${row_data[2]}</span>:<span>${ips}</span><br>"
ranges="${ranges}\nRG:<span>${row_data[1]}</span>-<span>${row_data[2]}</span>:<span>${ips}</span><br>"
;;
'host' )
# data for prev host
if [ ! "${host}" = '' ]; then
hosts="${hosts}<tr class=\"Fixed\"><td class=\"ip\">${fixed_address}</td><td class=\"starts\"></td><td class=\"ends\"></td><td class=\"mac\">${hardware}</td><td class=\"hostname\">${host}</td><td class=\"vendor\">$vendor</td></tr>"
hardware=''; fixed_address=''; vendor=''
fi
host="${row_data[1]}"
;;
'hardware' )
hardware="${row_data[2]}"
if $opt_vendor_lookup; then
vendor="$(oui_lookup $hardware)"
fi
;;
'fixed-address' )
fixed_address="${row_data[1]}"
;;
esac
fi
done < $dhcpd_conf

if $first; then
print "<div class=\"bar_bg\"><div class=\"bar_fg\"></div></div><p>IPs:<span class=\"s_ips\">${subnet_ips}</span> Leased:<span class=\"s_leased\">0</span>(<span class=\"s_leased_percent\">0%</span>)${ranges}</p></div>"
# data for last subnet
if [ ! "${subnets}" = '' ]; then
subnets="${subnets}<div class=\"bar_bg\"><div class=\"bar_fg\"></div></div><p>IPs:<span class=\"s_ips\">${subnet_ips}</span> Leased:<span class=\"s_leased\">0</span>(<span class=\"s_leased_percent\">0%</span>) Fixed:<span class=\"s_fixed\">0</span>${ranges}</p></div>"
fi
# data for last host
if [ ! "${host}" = '' ]; then
hosts="${hosts}<tr class=\"Fixed\"><td class=\"ip\">${fixed_address}</td><td class=\"starts\"></td><td class=\"ends\"></td><td class=\"mac\">${hardware}</td><td class=\"hostname\">${host}</td><td class=\"vendor\">$vendor</td></tr>"
fi
#return 2 variables: dhcpd_conf_hosts and dhcpd_conf_subnets
print "dhcpd_conf_hosts='"$hosts"'; dhcpd_conf_subnets='"$subnets"'"
}



function dhcpd_leases_parse {
now="$(date -u '+%Y/%m/%d %H:%M:%S')"
lease=''
Expand Down Expand Up @@ -166,11 +212,7 @@ function dhcpd_leases_parse {
'hardware' )
mac="${row_data[2]%';'*}"
if $opt_vendor_lookup; then
IFS=':'; set -- $mac; unset IFS
oui_data=$(grep -iF -m 1 ${1}-${2}-${3} ${oui_tmp}/${oui_db}${1%"${1#?}"}.csv 2>/dev/null) || true
if [ ! "$oui_data" = '' ]; then
vendor="${oui_data#*'|'}"
fi
vendor="$(oui_lookup $mac)"
fi
;;
"abandoned;" )
Expand All @@ -189,8 +231,8 @@ function dhcpd_leases_parse {
function html_home_page {
now="$(date -u '+%Y/%m/%d %H:%M:%S')"
start=$(date +%s)
html_subnets="$(dhcpd_conf_parse)"
html_leases="$(dhcpd_leases_parse)"
eval $(dhcpd_conf_parse) # returns $dhcpd_conf_hosts, $dhcpd_conf_subnets
html_leases="$(dhcpd_leases_parse)${dhcpd_conf_hosts}"
seconds=$(( $(date +%s) - $start ))
[ -f "${oui_downloading}" ] && vendor='Vendor: <i>db is downloading..</i>&nbsp;&nbsp;</i>' || vendor='Vendor'

Expand All @@ -208,7 +250,7 @@ function html_home_page {
<a href="https://github.com/facelessfish/dhcpd-leasesd" target="_blank"><img src="$logo"></a>&nbsp; <b>dhcpd.leases dashboard</b> ${version}&nbsp;&nbsp;&nbsp; <b>Refreshed:</b><span id="now">$now</span> (<span>all time are <u>UTC</u></span>)&nbsp; <b>Parsing&nbsp;time:</b><span>${seconds} sec. </span><div id ="refresh" class="button" onclick="location.reload()">&#8635; Refresh</div>
</div>
<div id="subnets">
$html_subnets
$dhcpd_conf_subnets
</div>
<table id="bargraph">
<thead>
Expand All @@ -223,7 +265,7 @@ function html_home_page {
<b>dhcpd.leases:</b>
<table id="menu" cellspacing=2>
<tr>
<td id="All" class="selected">All:<span id="leases_total"></span></td><td id="Leased">Leased:<span id="leases_leased"></span></td><td id="Expired">Expired:<span id="leases_expired">&nbsp;&nbsp;&nbsp;</span></td><td id="Abandoned">Abandoned:<span id="leases_abandoned"></span></td>
<td id="All" class="selected">All:<span id="leases_total"></span></td><td id="Leased">Leased:<span id="leases_leased"></span></td><td id="Expired">Expired:<span id="leases_expired">&nbsp;&nbsp;&nbsp;</span></td><td id="Abandoned">Abandoned:<span id="leases_abandoned"></span></td><td class="spacer">&nbsp;&nbsp;&nbsp;</td><td id="Fixed">Fixed:<span id="leases_fixed"></span></td>
</tr>
</table>
&nbsp;&nbsp;&nbsp;<div><input size=16 id="search" type="search" placeholder="Search.." title="Search leases (all columns)"></div><div id ="clear" class="button"> &#x2715; Clear</div>
Expand Down Expand Up @@ -251,7 +293,7 @@ EOF


function http_server {
print "Listening on ${listen}:${port}"
lprint "$(date '+%Y-%m-%d %H:%M:%S') Listening on ${listen}:${port}\n"
# Make fifo
if [ ! -p "$fifo" ] ; then
mkfifo $fifo
Expand All @@ -265,7 +307,7 @@ function http_server {
mkdir "$oui_tmp"
fi
$self -u >/dev/null &
> ${oui_downloading} # for current request
> ${oui_downloading} # Downloading msg for current request
fi
html_home_page
} | nc -lN $listen $port > $fifo
Expand All @@ -275,7 +317,7 @@ function http_server {

function script_export {
file=$1;
print "Merging script, javascript and styles into: $file"
lprint "Merging script, javascript and styles into: $file\n"
> $file
IFS=''

Expand All @@ -302,20 +344,15 @@ function script_export {
fi
done < $self
else
print "Cant merge a merged script (${self})."
lprint "Cant merge a merged script (${self}).\n"
exit
fi
chmod +x $file
print 'Done.'
lprint "Done.\n"
}



# Redirect output if not running interactively
if [ ! -t 0 ]; then
exec 1>/dev/null
fi


while getopts 'dhtuvkf:l:p:b:c:' name; do
case $name in
Expand Down Expand Up @@ -345,10 +382,10 @@ while getopts 'dhtuvkf:l:p:b:c:' name; do
c)
dhcpd_conf=$OPTARG ;;
h)
print "${usage}"
lprint "${usage}\n"
exit ;;
?)
print "${usage}"
lprint "${usage}\n"
exit 2 ;;
esac
done
Expand All @@ -360,8 +397,8 @@ if $opt_vendor_lookup; then
oui_update
fi

# Server using buildin nc server
# ./dhcpd-leasesd -dv -b dhcpd.leases -c dhcpd.conf -l 192.168.5.11 -p 9130
# Serve using buildin nc server
# ./dhcpd-leasesd -dv -b dhcpd.leases -c dhcpd.conf -l 192.168.5.11
if $opt_server; then
http_server
exit
Expand All @@ -374,5 +411,10 @@ if $opt_header; then
fi

# CGI mode
# Output content-type if running as a cgi
if [ ! -t 0 ]; then
print "Content-type: text/html\n\n";
fi

html_home_page

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