#!/usr/bin/perl
#
# DHCP Reporting, Revision 2.1
#
# Copyright (C) 1997-2002 John G. Drummond (omar@omar.org)
# http://www.omar.org/opensource/
#
# Feel free to email me with comments, criticisms, or questions.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# This program uses Stephen Brenner's cgi-lib.pl, included at the end
# of the file for compactness. See the copyright statement preceding
# the cgi-lib.pl code.
#
#################################################################
###--------------------------OPTIONS--------------------------###
# Change to your dhcp file and dhcpd.conf:
# (Currently set to ISC DHCP defaults)
my $dhcpfile = "/var/state/dhcp/dhcpd.leases";
my $dhcpdconf = "/etc/dhcpd.conf";
# change to the relative (web) path to the cgi directory where
# reportdhcp.pl is located (usually /cgi-bin):
my $CGI = "/cgi-bin";
# change to reflect your system name
my $sysname = "Harrisonburg DSL";
###----------------------End of Options-----------------------###
#################################################################
# MAIN PROGRAM #
ReadParse(*values); #contained in cgi-lib.pl, at the bottom.
print "Content-type: text/html\n\n";
print "<html>\n<head>\n";
print "<title>reportdhcp.pl - DHCP Reporting</title>\n</head>";
&ParseConfig();
&ParseLeaseFile();
#perform the requested action...
if ($values{"sort"} eq "ipsort") {&sortip;}
elsif ($values{"sort"} eq "namesort") {&sortname;}
elsif ($values{"sort"} eq "agesort") {&sortdate;}
elsif ($values{"dostats"} || $ARGV[0] eq "test") {&stats;}
elsif ($values{"findip"}) {&findip;}
elsif ($values{"findmac"}) {&findmac;}
elsif ($values{"findname"}) {&findname;}
else {&dohtml;} #default action, even if input is bogus
print "</body></html>";
exit 0;
# END MAIN PROGRAM #
# Sorts entries by the client-hostname field
sub sortname {
my %names;
$counter=0;
foreach $ip (@ips) {
$name = $lease{$ip}{"client-hostname"};
$names{$name.$counter}=$ip; #counter keeps identical names from clobbering
$counter++;
}
my @sorted = sort(keys(%names));
print "<H2>$sysname</H2>\n";
print "<h2>Entries in dhcpd.leases sorted by name</h2>\n";
&PrintEntries(\@sorted, \%names);
}
# Sorts entries by lease start date
sub sortdate {
my %ages;
foreach $ip (@ips) {
$age = $lease{$ip}{"starts"};
@age1 = split(/ /, $age);
@date = split (/\//, $age1[1]);
@hour = split (/:/, $age1[2]);
$age = $date[0].$date[1].$date[2].$hour[0].$hour[1].$hour[2];
$ages{$age}=$ip;
}
@sorted = sort(keys(%ages));
print "<H2>$sysname</H2>\n";
print "<h2>Entries in dhcpd.leases sorted by age</h2>\n";
&PrintEntries(\@sorted, \%ages);
}
#Sorts entries by IP address (Actually, they're already sorted. Sorta. ;) )
sub sortip {
print "<H2>$sysname</H2>\n";
print "<h2>Entries in dhcpd.leases sorted by IP address</h2>\n";
&PrintEntries(\@ips)
}
#Finds entry for a given IP address.
sub findip {
$ip = $values{"findip"};
chomp($ip);
print "<H2>$sysname</H2>\n";
print "<table border=1><tr><th>IP</th><th>MAC</th>";
print "<th>Name</th><th>Starts</th><th>Ends</th></tr>";
print "<tr><td>$ip</td><td>".$lease{$ip}{"hardware"};
print "</td><td> ".$lease{$ip}{"client-hostname"}."</td>";
print "<td>";
&parsedate($lease{$ip}{"starts"});
print "</td><td>";
&parsedate($lease{$ip}{"ends"});
print "</td></tr></table>";
print "</table><center><a href=\"$CGI/reportdhcp.pl\">Back</a></center>";
}
#Finds entry for a given MAC address (hardware id in leases file)
sub findmac {
$mac = $values{"findmac"};
print "<H2>$sysname</H2>\n";
print "<table border=1><tr><th>IP</th><th>MAC</th>";
print "<th>Name</th><th>Starts</th><th>Ends</th></tr>";
foreach $ip (@ips) {
if ($lease{$ip}{"hardware"} =~ /$mac/) {
print "<tr><td>$ip</td><td>".$lease{$ip}{"hardware"};
print "</td><td> ".$lease{$ip}{"client-hostname"}."</td>";
print "<td>".$lease{$ip}{"starts"}."</td><td>";
print $lease{$ip}{"ends"}."</td></tr>";
}
}
print "</table><center><a href=\"$CGI/reportdhcp.pl\">Back</a></center>";
}
#Finds an entry based on a given name (client-hostname in leases file)
sub findname {
$name = $values{"findname"};
print "<H2>$sysname</H2>\n";
print "<table border=1><tr><th>IP</th><th>MAC</th>";
print "<th>Name</th><th>Starts</th><th>Ends</th></tr>";
foreach $ip (@ips) {
if ($lease{$ip}{"client-hostname"} =~ /$name/) {
print "<tr><td>$ip</td><td>".$lease{$ip}{"hardware"};
print "</td><td> ".$lease{$ip}{"client-hostname"}."</td>";
print "<td>".$lease{$ip}{"starts"}."</td><td>";
print $lease{$ip}{"ends"}."</td></tr>";
}
}
print "</table><center><a href=\"$CGI/reportdhcp.pl\">Back</a></center>";
}
#Prints general statistics table
sub stats {
print "<H2>$sysname</H2>\n";
print "<center><h3>General Statistics</h3>\n";
print "<table border=1><tr><th colspan=3>Total Leases in file:</th>";
print "<td colspan=2>$entries</td></tr>\n";
print "<tr><th colspan=3>Abandoned Leases:</th><td colspan=2>";
my $abcount = 0;
my $expcount = 0;
my $ip="";
foreach $ip (@ips) {
if (!$lease{$ip}{"hardware"}) {
$abcount++;
}
elsif ($lease{$ip}{"binding"} eq "free") {
$expcount++;
}
}
print "$abcount</td></tr>\n";
print "<tr><th colspan=3>Expired Leases:</th><td colspan=2>";
print "$expcount</td></tr>\n";
print "<tr><th colspan=5>Usage by Network</th></tr>\n";
print "<tr><td><b>Network</b></td><td><b>Netmask</b></td>";
print "<td><b>Active</b></td><td><b>Abandoned</b></td><td><b>Expired</b></td></tr>\n";
foreach $net (@networks) {
my $count=0;
my $abcount=0;
my $expcount=0;
my $wtf=0;
foreach $entry (@ips) {
if (&isinrange ($range{$net}, $entry) eq "true") {
if (!$lease{$entry}{"hardware"}) {
$abcount++;
}
elsif ($lease{$entry}{"binding"} eq "free") {
$expcount++;
}
elsif ($lease{$entry}{"binding"} eq "active") {
$count++;
}
else {
$wtf++; #Used for debugging only
}
}
}
print "<tr><td>$net</td><td><i>$nets{$net}</i><td><b>$count</b></td>";
print "<td>$abcount</td><td>$expcount</td></tr>\n";
}
print "</table>\n<a href=\"$CGI/reportdhcp.pl\">Back</a>\n</html>";
}
#Parses lease file date into a more easily readable format
sub parsedate {
@date = split(/ /, $_[0]);
%months = ("01", "January",
"02", "February",
"03", "March",
"04", "April",
"05", "May",
"06", "June",
"07", "July",
"08", "August",
"09", "September",
"10", "October",
"11", "November",
"12", "December");
%days = ("0", "Sunday",
"1", "Monday",
"2", "Tuesday",
"3", "Wednesday",
"4", "Thursday",
"5", "Friday",
"6", "Saturday");
$date[0] = $days{$date[0]}. ", ";
@day = split (/\//, $date[1]);
$date[1] = $months{$day[1]} . " $day[2], $day[0] ";
print @date, " GMT";
}
#Checks to see if a given address is in a given range, by octet.
#Probably inefficient as hell.
sub isinrange ($$) {
my ($rangestr, $ip) = @_;
local @success;
@ranges = split (/:/, $rangestr);
local @ip = split (/\./, $ip);
foreach $range (@ranges) {
local @bounds = split(/-/, $range);
@lower=split(/\./, $bounds[0]);
@upper=split(/\./, $bounds[1]);
for ($i=0; $i<4; $i++) {
if (($ip[$i] >= $lower[$i]) && ($ip[$i] <= $upper[$i])) {
$success[$i] = 1;
}
else {
$success[$i] = 0;
}
}
local $test = $success[0]+$success[1]+$success[2]+$success[3];
if ($test == 4) {
return "true"; #success!
}
}
return "false"; #failure!
}
#Reads and munges the dhcpd.conf file
sub ParseConfig {
unless(open (IN, $dhcpdconf)) {
&CgiDie("Error: unable to open file $dhcpdconf: $!"); #CgiDie from cgi-lib.pl.
exit -1;
}
my @info = <IN>;
close (IN) or &CgiDie ("Couldn't close $dhcpdconf: $!");
my $line;
my @parts;
my $i = 0;
my $dlt; #not doing anything with dlt yet!
our %range;
while ($line=$info[$i]) { # parse the dhcpd.conf file
if ($line =~ m/^#/) { # ignore commented lines
$i++;
next;
}
if ($line =~ m/default-lease-time/) { #found default lease time
@parts= split(/\s/, $line);
$dlt = $parts[1];
}
if ($line =~ m/subnet/) {
my @parts = split (/\s/, $line);
my $j = 0;
foreach $part(@parts) {
if ($part eq "subnet") {
$netwk = $parts[$j+1];
$mask = $parts[$j+3];
$nets{$netwk} = $mask; #save net and mask pairs in a hash
}
$j++;
}
}
if ($line =~ m/range/) { # get address range
my @parts = split (/\s/, $line);
$j = 0;
foreach $part(@parts) {
if ($part eq "range") { # Potential list of ranges...
chop ($parts[$j+2]);
$range{$netwk} .= $parts[$j+1] . "-" . $parts[$j+2] . ":";
}
$j++;
}
}
$i++;
}
our @networks = sort(keys(%nets));
}
#Prints out sorted tables for other routines
sub PrintEntries {
my ($sortref, $dataref) = @_; # have to pass as a referece
my @sorted = @$sortref; # dereference for my sanity
if ($dataref) {
our %data = %$dataref; # " "
}
print "<p><a href=\"$CGI/reportdhcp.pl\">Back to main</a></p>\n";
## offer filter button
print '<form action="'.$CGI.'/reportdhcp.pl" method="POST">';
print "<b>Filter:</b> ";
if ($values{"filteractive"}) {
print "<input type=\"checkbox\" name=\"filteractive\" value=\"1\" CHECKED> Active Leases Only\n";
}
else {
print "<input type=\"checkbox\" name=\"filteractive\" value=\"1\"> Active Leases Only\n";
}
print "<input type=\"hidden\" name=\"sort\" value=\"".$values{"sort"}."\">\n";
print '<br><input type="submit" value="Refresh Screen"></form>';
## Calculate current GMT
my ($sec, $min, $hr, $mond, $mon, $year, $weekd, $yeard, $dls) = gmtime(time);
$year += 1900;
$mon++;
if ($mon < 10) {
$mon = "0" . $mon;
}
my $curgmt = "$weekd $year/$mon/$mond $hr:$min:$sec";
print "Current time is: <b> ";
&parsedate($curgmt);
print "</b><br>\n";
print "\n<table border=1><tr><th>\ \;</th><th>IP</th><th>MAC</th>\n";
print "<th>Name</th><th>Status</th><th>Starts</th><th>Ends</th></tr>\n";
foreach $entry (@sorted) {
if ($dataref) {
$ip = $data{$entry};
}
else {
$ip = $entry;
}
unless ($values{"filteractive"} && $lease{$ip}{"binding"} eq "free") {
print "<tr><td>\n";
print '<form action="'.$CGI.'/reportdhcp.pl" method="POST">';
print "\n<input type=\"hidden\" name=\"findip\" value=\"$ip\">";
print '<input type="submit" value="Select"></form></td>';
print "\n<td><font size=-1>$ip</td>\n";
print "<td><font size=-1>".$lease{$ip}{"hardware"}."</td>\n";
print "<td><font size=-1> ".$lease{$ip}{"client-hostname"}."</td>\n";
print "<td><font size=-1>".$lease{$ip}{"binding"}."</td>\n";
print "<td><font size=-1>";
&parsedate($lease{$ip}{"starts"});
print "</td>\n";
print "<td><font size=-1>";
&parsedate($lease{$ip}{"ends"});
print "</td></tr>\n";
}
}
print "</table>\n<p><a href=\"$CGI/reportdhcp.pl\">Back to main</a></p>\n";
print "</body></html>\n";
}
# Reads and munges the leases file generated by dhcpd
sub ParseLeaseFile {
our %lease;
unless(open (IN, $dhcpfile)) {
print "\nError: unable to open file $dhcpfile: $! \n";
exit -1;
}
my @leases = <IN>;
my $data = "";
foreach $line (@leases) {
unless ($line =~ m/^#/) { # ignore commented lines
$data .= $line;
}
}
my @data = split (/lease /, $data); #split each lease into an array entry
foreach (@data) { #create hash of hashes keyed on ip from the array
my @temp = split(/{/, $_);
chop($temp[0]); # 0 is IP
chop($temp[1]); # 1 is the rest...
chop($temp[1]);
$temp[1] =~ tr/\t//d;
@t = split(/;\n/, $temp[1]); #split each lease on newline
my $i=0;
while ($t[$i]) {
my $string = $t[$i];
$string =~ tr/\n//d;
$string =~ s/^\s*//; # remove any leading spaces
@words = split(/\s+/, $string); #hashes keyed on first word
if ($words[0]) {
$key = shift(@words);
$lease{$temp[0]}{$key}="@words";
$lease{$temp[0]}{"hardware"}=~ s/ethernet//;
$lease{$temp[0]}{"binding"}=~ s/state //;
}
$i++;
}
}
my @temp = sort(keys(%lease));
my $prev = ""; # checks for duplicates
@ips=grep($_ ne $prev && (($prev) = $_), @temp);
$entries = @ips;
}
#Prints the base page
sub dohtml {
print << "HTMLDONE";
<body>
<center>
<h3>DHCP Reporting!</h3>
<font size=-1>v. 2.1 by <a href=\"mailto:omar\@allwrong.com\">John G. Drummond</a>
</font>
<p>
<H2>$sysname</H2>
<table border=1>
<tr>
<td>General Stats</td>
<td>
<form action=\"$CGI/reportdhcp.pl\" method=\"POST\">
<input type=\"hidden\" name=\"dostats\" value=\"yes\">
<input type=\"submit\" value=\"GO!\"></form>
</td>
</tr>
<tr>
<td>DHCP lease file entries, sorted by IP</td>
<td>
<form action=\"$CGI/reportdhcp.pl\" method=\"POST\">
<input type=\"hidden\" name=\"sort\" value=\"ipsort\">
<input type=\"submit\" value="GO!"></form>
</td>
</tr>
<tr>
<td>DHCP lease file entries, sorted by Age</td>
<td>
<form action=\"$CGI/reportdhcp.pl\" method=\"POST\">
<input type=\"hidden\" name=\"sort\" value=\"agesort\">
<input type=\"submit\" value=\"GO!\">
</form>
</td>
</tr>
<tr>
<td>DHCP lease file entries, sorted by Name</td>
<td>
<form action=\"$CGI/reportdhcp.pl\" method=\"POST\">
<input type=\"hidden\" name=\"sort\" value=\"namesort\">
<input type=\"submit\" value=\"GO!\">
</form>
</td>
</tr>
</table>
<p>
<table border=1>
<tr>
<td>Find the entry for this IP address:</td>
<td>
<form action=\"$CGI/reportdhcp.pl\" method="POST">
<input type=\"text\" name=\"findip\" length=\"25\">
<input type=\"submit\" value=\"GO!\">
</form>
</td>
</tr>
<tr>
<td>Find the entry for this MAC address:</td>
<td>
<form action=\"$CGI/reportdhcp.pl\" method=\"POST\">
<input type=\"text\" name=\"findmac\" length=\"25\">
<input type=\"submit\" value=\"GO!\">
</form>
</td>
</tr>
<tr>
<td>Find the entry for this Client Name:</td>
<td>
<form action=\"$CGI/reportdhcp.pl\" method="POST">
<input type=\"text\" name=\"findname\" length=\"25\">
<input type=\"submit\" value=\"GO!\">
</form>
</td>
</tr>
</table>
</body>
</html>
HTMLDONE
}
BEGIN {
#Stephen Brenner's cgi-lib.pl is included below for compactness,
#in its entirety for completeness. Copyright statement follows:
#------- Begin cgi-lib.pl ---------
# Perl Routines to Manipulate CGI input
# cgi-lib@pobox.com
# $Id: cgi-lib.pl,v 2.18 1999/02/23 08:16:43 brenner Exp $
#
# Copyright (c) 1993-1999 Steven E. Brenner
# Unpublished work.
# Permission granted to use and modify this library so long as the
# copyright above is maintained, modifications are documented, and
# credit is given for any use of the library.
#
# Thanks are due to many people for reporting bugs and suggestions
# For more information, see:
# http://cgi-lib.stanford.edu/cgi-lib/
$cgi_lib'version = sprintf("%d.%02d", q$Revision: 2.18 $ =~ /(\d+)\.(\d+)/);
# Parameters affecting cgi-lib behavior
# User-configurable parameters affecting file upload.
$cgi_lib'maxdata = 131072; # maximum bytes to accept via POST - 2^17
$cgi_lib'writefiles = 0; # directory to which to write files, or
# 0 if files should not be written
$cgi_lib'filepre = "cgi-lib"; # Prefix of file names, in directory above
# Do not change the following parameters unless you have special reasons
$cgi_lib'bufsize = 8192; # default buffer size when reading multipart
$cgi_lib'maxbound = 100; # maximum boundary length to be encounterd
$cgi_lib'headerout = 0; # indicates whether the header has been printed
# ReadParse
# Reads in GET or POST data, converts it to unescaped text, and puts
# key/value pairs in %in, using "\0" to separate multiple selections
# Returns >0 if there was input, 0 if there was no input
# undef indicates some failure.
# Now that cgi scripts can be put in the normal file space, it is useful
# to combine both the form and the script in one place. If no parameters
# are given (i.e., ReadParse returns FALSE), then a form could be output.
# If a reference to a hash is given, then the data will be stored in that
# hash, but the data from $in and @in will become inaccessable.
# If a variable-glob (e.g., *cgi_input) is the first parameter to ReadParse,
# information is stored there, rather than in $in, @in, and %in.
# Second, third, and fourth parameters fill associative arrays analagous to
# %in with data relevant to file uploads.
# If no method is given, the script will process both command-line arguments
# of the form: name=value and any text that is in $ENV{'QUERY_STRING'}
# This is intended to aid debugging and may be changed in future releases
sub ReadParse {
# Disable warnings as this code deliberately uses local and environment
# variables which are preset to undef (i.e., not explicitly initialized)
local ($perlwarn);
$perlwarn = $^W;
$^W = 0;
local (*in) = shift if @_; # CGI input
local (*incfn, # Client's filename (may not be provided)
*inct, # Client's content-type (may not be provided)
*insfn) = @_; # Server's filename (for spooled files)
local ($len, $type, $meth, $errflag, $cmdflag, $got, $name);
binmode(STDIN); # we need these for DOS-based systems
binmode(STDOUT); # and they shouldn't hurt anything else
binmode(STDERR);
# Get several useful env variables
$type = $ENV{'CONTENT_TYPE'};
$len = $ENV{'CONTENT_LENGTH'};
$meth = $ENV{'REQUEST_METHOD'};
if ($len > $cgi_lib'maxdata) { #'
&CgiDie("cgi-lib.pl: Request to receive too much data: $len bytes\n");
}
if (!defined $meth || $meth eq '' || $meth eq 'GET' ||
$meth eq 'HEAD' ||
$type eq 'application/x-www-form-urlencoded') {
local ($key, $val, $i);
# Read in text
if (!defined $meth || $meth eq '') {
$in = $ENV{'QUERY_STRING'};
$cmdflag = 1; # also use command-line options
} elsif($meth eq 'GET' || $meth eq 'HEAD') {
$in = $ENV{'QUERY_STRING'};
} elsif ($meth eq 'POST') {
if (($got = read(STDIN, $in, $len) != $len))
{$errflag="Short Read: wanted $len, got $got\n";};
} else {
&CgiDie("cgi-lib.pl: Unknown request method: $meth\n");
}
@in = split(/[&;]/,$in);
push(@in, @ARGV) if $cmdflag; # add command-line parameters
foreach $i (0 .. $#in) {
# Convert plus to space
$in[$i] =~ s/\+/ /g;
# Split into key and value.
($key, $val) = split(/=/,$in[$i],2); # splits on the first =.
# Convert %XX from hex numbers to alphanumeric
$key =~ s/%([A-Fa-f0-9]{2})/pack("c",hex($1))/ge;
$val =~ s/%([A-Fa-f0-9]{2})/pack("c",hex($1))/ge;
# Associate key and value
$in{$key} .= "\0" if (defined($in{$key})); # \0 is the multiple separator
$in{$key} .= $val;
}
} elsif ($ENV{'CONTENT_TYPE'} =~ m#^multipart/form-data#) {
# for efficiency, compile multipart code only if needed
$errflag = !(eval <<'END_MULTIPART');
local ($buf, $boundary, $head, @heads, $cd, $ct, $fname, $ctype, $blen);
local ($bpos, $lpos, $left, $amt, $fn, $ser);
local ($bufsize, $maxbound, $writefiles) =
($cgi_lib'bufsize, $cgi_lib'maxbound, $cgi_lib'writefiles);
# The following lines exist solely to eliminate spurious warning messages
$buf = '';
($boundary) = $type =~ /boundary="([^"]+)"/; #"; # find boundary
($boundary) = $type =~ /boundary=(\S+)/ unless $boundary;
&CgiDie ("Boundary not provided: probably a bug in your server")
unless $boundary;
$boundary = "--" . $boundary;
$blen = length ($boundary);
if ($ENV{'REQUEST_METHOD'} ne 'POST') {
&CgiDie("Invalid request method for multipart/form-data: $meth\n");
}
if ($writefiles) {
local($me);
stat ($writefiles);
$writefiles = "/tmp" unless -d _ && -w _;
# ($me) = $0 =~ m#([^/]*)$#;
$writefiles .= "/$cgi_lib'filepre";
}
# read in the data and split into parts:
# put headers in @in and data in %in
# General algorithm:
# There are two dividers: the border and the '\r\n\r\n' between
# header and body. Iterate between searching for these
# Retain a buffer of size(bufsize+maxbound); the latter part is
# to ensure that dividers don't get lost by wrapping between two bufs
# Look for a divider in the current batch. If not found, then
# save all of bufsize, move the maxbound extra buffer to the front of
# the buffer, and read in a new bufsize bytes. If a divider is found,
# save everything up to the divider. Then empty the buffer of everything
# up to the end of the divider. Refill buffer to bufsize+maxbound
# Note slightly odd organization. Code before BODY: really goes with
# code following HEAD:, but is put first to 'pre-fill' buffers. BODY:
# is placed before HEAD: because we first need to discard any 'preface,'
# which would be analagous to a body without a preceeding head.
$left = $len;
PART: # find each part of the multi-part while reading data
while (1) {
die $@ if $errflag;
$amt = ($left > $bufsize+$maxbound-length($buf)
? $bufsize+$maxbound-length($buf): $left);
$errflag = (($got = read(STDIN, $buf, $amt, length($buf))) != $amt);
die "Short Read: wanted $amt, got $got\n" if $errflag;
$left -= $amt;
$in{$name} .= "\0" if defined $in{$name};
$in{$name} .= $fn if $fn;
$name=~/([-\w]+)/; # This allows $insfn{$name} to be untainted
if (defined $1) {
$insfn{$1} .= "\0" if defined $insfn{$1};
$insfn{$1} .= $fn if $fn;
}
BODY:
while (($bpos = index($buf, $boundary)) == -1) {
if ($left == 0 && $buf eq '') {
foreach $value (values %insfn) {
unlink(split("\0",$value));
}
&CgiDie("cgi-lib.pl: reached end of input while seeking boundary " .
"of multipart. Format of CGI input is wrong.\n");
}
die $@ if $errflag;
if ($name) { # if no $name, then it's the prologue -- discard
if ($fn) { print FILE substr($buf, 0, $bufsize); }
else { $in{$name} .= substr($buf, 0, $bufsize); }
}
$buf = substr($buf, $bufsize);
$amt = ($left > $bufsize ? $bufsize : $left); #$maxbound==length($buf);
$errflag = (($got = read(STDIN, $buf, $amt, length($buf))) != $amt);
die "Short Read: wanted $amt, got $got\n" if $errflag;
$left -= $amt;
}
if (defined $name) { # if no $name, then it's the prologue -- discard
if ($fn) { print FILE substr($buf, 0, $bpos-2); }
else { $in {$name} .= substr($buf, 0, $bpos-2); } # kill last \r\n
}
close (FILE);
last PART if substr($buf, $bpos + $blen, 2) eq "--";
substr($buf, 0, $bpos+$blen+2) = '';
$amt = ($left > $bufsize+$maxbound-length($buf)
? $bufsize+$maxbound-length($buf) : $left);
$errflag = (($got = read(STDIN, $buf, $amt, length($buf))) != $amt);
die "Short Read: wanted $amt, got $got\n" if $errflag;
$left -= $amt;
undef $head; undef $fn;
HEAD:
while (($lpos = index($buf, "\r\n\r\n")) == -1) {
if ($left == 0 && $buf eq '') {
foreach $value (values %insfn) {
unlink(split("\0",$value));
}
&CgiDie("cgi-lib: reached end of input while seeking end of " .
"headers. Format of CGI input is wrong.\n$buf");
}
die $@ if $errflag;
$head .= substr($buf, 0, $bufsize);
$buf = substr($buf, $bufsize);
$amt = ($left > $bufsize ? $bufsize : $left); #$maxbound==length($buf);
$errflag = (($got = read(STDIN, $buf, $amt, length($buf))) != $amt);
die "Short Read: wanted $amt, got $got\n" if $errflag;
$left -= $amt;
}
$head .= substr($buf, 0, $lpos+2);
push (@in, $head);
@heads = split("\r\n", $head);
($cd) = grep (/^\s*Content-Disposition:/i, @heads);
($ct) = grep (/^\s*Content-Type:/i, @heads);
($name) = $cd =~ /\bname="([^"]+)"/i; #";
($name) = $cd =~ /\bname=([^\s:;]+)/i unless defined $name;
($fname) = $cd =~ /\bfilename="([^"]*)"/i; #"; # filename can be null-str
($fname) = $cd =~ /\bfilename=([^\s:;]+)/i unless defined $fname;
$incfn{$name} .= (defined $in{$name} ? "\0" : "") .
(defined $fname ? $fname : "");
($ctype) = $ct =~ /^\s*Content-type:\s*"([^"]+)"/i; #";
($ctype) = $ct =~ /^\s*Content-Type:\s*([^\s:;]+)/i unless defined $ctype;
$inct{$name} .= (defined $in{$name} ? "\0" : "") . $ctype;
if ($writefiles && defined $fname) {
$ser++;
$fn = $writefiles . ".$$.$ser";
open (FILE, ">$fn") || &CgiDie("Couldn't open $fn\n");
binmode (FILE); # write files accurately
}
substr($buf, 0, $lpos+4) = '';
undef $fname;
undef $ctype;
}
1;
END_MULTIPART
if ($errflag) {
local ($errmsg, $value);
$errmsg = $@ || $errflag;
foreach $value (values %insfn) {
unlink(split("\0",$value));
}
&CgiDie($errmsg);
} else {
# everything's ok.
}
} else {
&CgiDie("cgi-lib.pl: Unknown Content-type: $ENV{'CONTENT_TYPE'}\n");
}
# no-ops to avoid warnings
$insfn = $insfn;
$incfn = $incfn;
$inct = $inct;
$^W = $perlwarn;
return ($errflag ? undef : scalar(@in));
}
# PrintHeader
# Returns the magic line which tells WWW that we're an HTML document
sub PrintHeader {
return "Content-type: text/html\n\n";
}
# HtmlTop
# Returns the <head> of a document and the beginning of the body
# with the title and a body <h1> header as specified by the parameter
sub HtmlTop
{
local ($title) = @_;
return <<END_OF_TEXT;
<html>
<head>
<title>$title</title>
</head>
<body>
<h1>$title</h1>
END_OF_TEXT
}
# HtmlBot
# Returns the </body>, </html> codes for the bottom of every HTML page
sub HtmlBot
{
return "</body>\n</html>\n";
}
# SplitParam
# Splits a multi-valued parameter into a list of the constituent parameters
sub SplitParam
{
local ($param) = @_;
local (@params) = split ("\0", $param);
return (wantarray ? @params : $params[0]);
}
# MethGet
# Return true if this cgi call was using the GET request, false otherwise
sub MethGet {
return (defined $ENV{'REQUEST_METHOD'} && $ENV{'REQUEST_METHOD'} eq "GET");
}
# MethPost
# Return true if this cgi call was using the POST request, false otherwise
sub MethPost {
return (defined $ENV{'REQUEST_METHOD'} && $ENV{'REQUEST_METHOD'} eq "POST");
}
# MyBaseUrl
# Returns the base URL to the script (i.e., no extra path or query string)
sub MyBaseUrl {
local ($ret, $perlwarn);
$perlwarn = $^W; $^W = 0;
$ret = 'http://' . $ENV{'SERVER_NAME'} .
($ENV{'SERVER_PORT'} != 80 ? ":$ENV{'SERVER_PORT'}" : '') .
$ENV{'SCRIPT_NAME'};
$^W = $perlwarn;
return $ret;
}
# MyFullUrl
# Returns the full URL to the script (i.e., with extra path or query string)
sub MyFullUrl {
local ($ret, $perlwarn);
$perlwarn = $^W; $^W = 0;
$ret = 'http://' . $ENV{'SERVER_NAME'} .
($ENV{'SERVER_PORT'} != 80 ? ":$ENV{'SERVER_PORT'}" : '') .
$ENV{'SCRIPT_NAME'} . $ENV{'PATH_INFO'} .
(length ($ENV{'QUERY_STRING'}) ? "?$ENV{'QUERY_STRING'}" : '');
$^W = $perlwarn;
return $ret;
}
# MyURL
# Returns the base URL to the script (i.e., no extra path or query string)
# This is obsolete and will be removed in later versions
sub MyURL {
return &MyBaseUrl;
}
# CgiError
# Prints out an error message which which containes appropriate headers,
# markup, etcetera.
# Parameters:
# If no parameters, gives a generic error message
# Otherwise, the first parameter will be the title and the rest will
# be given as different paragraphs of the body
sub CgiError {
local (@msg) = @_;
local ($i,$name);
if (!@msg) {
$name = &MyFullUrl;
@msg = ("Error: script $name encountered fatal error\n");
};
if (!$cgi_lib'headerout) { #')
print &PrintHeader;
print "<html>\n<head>\n<title>$msg[0]</title>\n</head>\n<body>\n";
}
print "<h1>$msg[0]</h1>\n";
foreach $i (1 .. $#msg) {
print "<p>$msg[$i]</p>\n";
}
$cgi_lib'headerout++;
}
# CgiDie
# Identical to CgiError, but also quits with the passed error message.
sub CgiDie {
local (@msg) = @_;
&CgiError (@msg);
die @msg;
}
# PrintVariables
# Nicely formats variables. Three calling options:
# A non-null associative array - prints the items in that array
# A type-glob - prints the items in the associated assoc array
# nothing - defaults to use %in
# Typical use: &PrintVariables()
sub PrintVariables {
local (*in) = @_ if @_ == 1;
local (%in) = @_ if @_ > 1;
local ($out, $key, $output);
$output = "\n<dl compact>\n";
foreach $key (sort keys(%in)) {
foreach (split("\0", $in{$key})) {
($out = $_) =~ s/\n/<br>\n/g;
$output .= "<dt><b>$key</b>\n <dd>:<i>$out</i>:<br>\n";
}
}
$output .= "</dl>\n";
return $output;
}
# PrintEnv
# Nicely formats all environment variables and returns HTML string
sub PrintEnv {
&PrintVariables(*ENV);
}
# The following lines exist only to avoid warning messages
$cgi_lib'writefiles = $cgi_lib'writefiles;
$cgi_lib'bufsize = $cgi_lib'bufsize ;
$cgi_lib'maxbound = $cgi_lib'maxbound;
$cgi_lib'version = $cgi_lib'version;
$cgi_lib'filepre = $cgi_lib'filepre;
1; #return true
#------ End cgi-lib.pl -------#
} # End of BEGIN statement
# End reportdhcp.pl