#!@PERLV_PATH@ # Looking glass # vars: query, router, args BEGIN { $me = $0; $me =~ s/.*\/(\S+)$/$1/; } use CGI qw/:standard/; use POSIX qw(strftime); use Sys::Syslog; use LockFile::Simple qw(lock trylock unlock); my($BASEDIR) = "@prefix@"; my($pingcmd) = "@LG_PING_CMD@"; my($query, $max_time_diff, $cache_dir, $cloginrc, @results); my($type, $router_param, $remote_user, $arg, $router, $mfg); if (!defined($ENV{HOME})) { $ENV{HOME} = "."; } # read LG configuration file sub readconf { my($conffile, $cmds); local(*CONF); if (defined($env{LG_CONF})) { $conffile = $env{LG_CONF}; } else { $conffile = "$BASEDIR/util/lg/lg.conf"; } if (! -f $conffile) { return; } if (open(CONF, "< $conffile")) { while () { next if (/^\s*(#|$)/); $cmds .= $_; } close(CONF); eval $cmds; } else { printf(STDERR "ERROR: couldn\'t open the configuration file: $conffile: $!\n"); exit(255); } return; } # logging sub dolog { my($level, $msg) = @_; if (defined($LG_LOG) && $LG_LOG !~ /\//) { openlog($me, "pid", $LG_LOG); syslog($level, "%s", $msg); closelog; } else { local(*LOG); my($file); if (defined($LG_LOG)) { $file = $LG_LOG; } else { $file = "$cache_dir/lg.log"; } # log date, hostname, query, addr open(LOG,">>$file") ; printf(LOG "$msg"); close(LOG); } return; } # run commands on the router sub DoRsh { my ($router, $mfg, $type, $arg) = @_; my($ctime) = time(); my($lckobj) = LockFile::Simple->make(-delay => $lock_int, -max => $max_lock_wait, -hold => $max_lock_hold); if ($pingcmd =~ /\d$/) { `$pingcmd $router`; } else { `$pingcmd $router 56 1`; } if ($?) { return ("$router is unreachable. Try again later.\n"); } if (! $lckobj->lock("$cache_dir/$router")) { return ("$router is busy. Try again later.\n"); } @results = &DoCmd($router, $mfg, $type, $arg); $lckobj->unlock("$cache_dir/$router"); return (@results); } sub DoCmd { my($rtr, $mfg, $type, $arg) = @_; local(*CMD); if ($mfg =~ /juniper/i) { open(CMD, "jlogin -f $cloginrc -c \'$juniperCmd{$type} $arg\' $rtr |"); $cmd = $juniperCmd{$type}; } else { open(CMD, "clogin -noenable -f $cloginrc -c \'$ciscoCmd{$type} $arg\' $rtr |"); $cmd = $ciscoCmd{$type}; } while () { tr/\015//d; if (/^error:/i) { dolog(LOG_ERR, $_); return ($_); } # push(@results, $_); if (/$cmd/) { ($prompt) = /^(\S*)[\#>]/; # push(@results, "prompt = $prompt\n\n"); last; } } while () { last if /^$prompt[\#>]/; tr/\015//d; push(@results, $_); } while () {} close(CMD); return @results; } # convert a ipv4 address mask to prefix length sub mask2len { my($mask) = shift; my($a, $b, $c, $d) = split('\.', $mask); my($p, $len); $p = ~ (($a << 24) + ($b << 16) + ($c << 8) + $d); for ($len = 32; $p > 0; $len --) { $p = $p >> 1; } return($len); } # create the page and log the transaction... sub print_results { my($timestr) = strftime("%a %b %e %H:%M:%S %Y %Z", gmtime); dolog(LOG_INFO, sprintf("%s %s %s %s\n", $ENV{REMOTE_HOST}, $ENV{REMOTE_ADDR}, $ENV{REMOTE_USER}, "- - [$timestr] $type $router $arg")); print $query->header; print $query->start_html("Looking Glass Results - $router"); $timestr = strftime("%a %b %e %H:%M:%S %Y %Z", gmtime); # add the company image, LG_IMAGE print $LG_IMAGE; print <

Looking Glass Results - $router

Date: $timestr

Query: $cmdDisp{$type}
HEAD if ($arg) { print "Argument(s): $arg\n"; } print "

\n"; print <

END

    if ($seconds) { print "From cache (number of seconds old (max $max_time_diff)): $seconds\n\n" ; }

    print @results;

    print <
	
	
END

    print $query->end_html;
    exit;

}  #end sub print_results


# read the configuration file if it exists.
readconf();

## The script will now cache the results as simple files in the $cache_dir,
## named after the type of query (queries must, of course, be one word no 
## spaces).  Modify $max_time_diff to set the lifetime for each cache.
## Currently, cache lifetime is the same for all queries.
# for most web servers, cache_dir must be writable by uid nobody 
if (defined($LG_CACHE_DIR)) {
    $cache_dir = $LG_CACHE_DIR;
} else {
    $cache_dir = "./tmp";
}

# when to display cache?  max time difference (in seconds)
if (defined($LG_CACHE_TIME)) {
    $max_time_diff = $LG_CACHE_TIME;
} else {
    $max_time_diff = "600" ;
}

# max seconds to wait for a 'router' lock to free up
$max_lock_wait = 30;
$lock_int = 5;
$max_lock_hold = 300;

# clogin setup
if (defined($LG_CLOGINRC)) {
    $cloginrc = $LG_CLOGINRC;
} else {
    $cloginrc = "$BASEDIR/.cloginrc";
}

$query = new CGI;

# get form data and validate
$type = ($query->param('query'))[0];
$router_param = ($query->param('router'))[0];
$remote_user = $ENV{REMOTE_USER};
$arg = ($query->param('args'))[0];
# handle multiple args
@arg = split(' ', $arg);

# verify commands, arguments, etc.
($router, $mfg) = split(':', $router_param);
if (!defined($type) || !defined($router)) {
    $results[0] = "You must at least choose a Query and a router.  Try buying a clue.\n";
    &print_results;
}

# conversion of command "type" passed from lgform.cgi to the vendor's syntax.
%ciscoCmd = (	
		#acl => "sh access-list",
		#aspath => "sh ip as-path-access-list",
		#communitylist => "sh ip community-list",
		damp => "sh ip bgp dampened-paths",
		framerelay => "sh frame-relay pvc",
		interface => "sh interface",
		intbrief => "sh ip interface",
		log => "sh logging",
		mbgp => "sh ip mbgp",
		mbgpsum => "sh ip mbgp summary",
		regex => "sh ip bgp regex",
		route => "sh ip route",
		#routemap => "sh route-map",
		ping => "ping",
		prefix => "sh ip bgp",
		prefixlist => "sh ip prefix-list",
		summary => "sh ip bgp summary",
		trace => "traceroute"
	);
%juniperCmd = (	
		#acl => "sh access-list",
		#aspath => "sh ip as-path-access-list",
		#communitylist => "sh ip community-list",
		damp => "show route damping suppressed terse table inet.0",
		interface => "sh interface",
		log => "show log messages",
		mbgp => "sh route table inet.2 terse",
		mbgpsum => "sh bgp summary",
		#regex => "sh route table inet.0 aspath-regex",
		route => "sh route table inet.0",
		#routemap => "sh route-map",
		ping => "ping rapid count 5",
		prefix => "sh route table inet.0",
		#prefixlist => "sh ip prefix-list",
		summary => "sh bgp summary",
		trace => "traceroute"
	);
%cmdDisp = (	
		#acl => "show access-list",
		#aspath => "show ip as-path-access-list",
		#communitylist => "show ip community-list",
		damp => "show ip bgp dampened-paths",
		log => "show logging",
		mbgp => "show ip mbgp",
		mbgpsum => "show ip mbgp summary",
		regex => "show ip bgp regex",
		route => "show ip route",
		#routemap => "show route-map",
		ping => "ping",
		prefix => "show ip bgp",
		prefixlist => "show ip prefix-list",
		summary => "show ip bgp summary",
		trace => "traceroute"
	);

# not all cmds/queries are implemented for junipers
if ($mfg =~ /juniper/ && ! defined($juniperCmd{$type})) {
    $results[0] = "$cmdDisp{$type} not implemented for junipers.  sorry.\n";
    &print_results;
}


if ($type eq "prefix" || $type eq "mbgp" || $type eq "route" ) {
    if ($arg[0] !~ /^\d+\.\d+\.\d+\.\d+$/) {
	$results[0] = "The IP address \"$arg[0]\" is not valid and lacking an address would over-burden our router.\n";
	&print_results;
    } elsif (defined($arg[1]) && $arg[1] !~ /^\d+\.\d+\.\d+\.\d+$/) {
	$results[0] = "The IP netmask \"$arg[1]\" is not valid.\n";
	&print_results;
    }
    if ($mfg =~ /juniper/i && defined($arg[1])) {
	$arg = $arg[0] . "/" . mask2len($arg[1]);
    }
} elsif ($type eq "framerelay") {
    if ($arg[0] > 15 && $arg[0] < 1024) {
	$arg = $arg[0];
    } else {
	undef($arg);
    }
} elsif ($type eq "interface") {
    if ($arg[1] =~ /[-\/0-9:.]+/) {
	$arg = $arg[0] . " " . $arg[1];
    } else {
	if ($arg[0] =~ /^b/i && $mfg =~ /cisco/i) {
	    $type = "intbrief";
	    $arg = "brief";
	} else {
	    $arg = $arg[0];
	}
    }
} elsif ($type eq "log") {
    $arg[0] =~ s/^\s*|//;
    if ($arg[0] =~ /^\s*$/) {
	shift(@arg);
    }
    if ($arg[0] !~ /^\s*$/) {
	if ($mfg =~ /cisco/i) {
	    $arg = " | include " . join(' ', @arg);
	} elsif ($mfg =~ /juniper/i) {
	    $arg = " | match \"" . join(' ', @arg) . "\"";
	}
    } else {
	undef($arg);
    }
} elsif ($type eq "ping" || $type eq "trace") {
    if ($arg[0] !~ /^\d+\.\d+\.\d+\.\d+$/) {
	if ($arg[0] !~ /([A-Za-z0-9-]*.)*[A-Za-z0-9-]*.(com|edu|net|org)/) {
	    $results[0] = "That argument ($arg[0]) is not valid.\n";
	    &print_results;
	}
    }
    $arg = $arg[0];
} elsif ($type eq "aspath" || $type eq "communitylist") {
    if ($arg[0] !~ /^\d+$/ || ($arg[0] < 1 && $arg[0] > 199)) {
	$results[0] = "That argument ($arg[0]) is not valid.\n";
	&print_results;
    }
    $arg = $arg[0];
} elsif ($type eq "acl") {
    if ($arg[0] !~ /^\d+$/ || ($arg[0] < 100 && $arg[0] > 199) ||
					($arg[0] < 1300 && $arg[0] > 2699)) {
	$results[0] = "That argument ($arg[0]) is not valid.\n";
	&print_results;
    }
    $arg = $arg[0];
    # don't show the jewels
    &print_results if ($arg == 98 || $arg == 99);
} elsif ($type eq "prefixlist" || $type eq "routemap") {
    if ($arg[0] !~ /^[A-Za-z][^\s\"]*$/) {
	$results[0] = "That argument ($arg[0]) is not valid.\n";
	&print_results;
    }
    $arg = $arg[0];
} elsif ($type eq "regex") {
    $arg = $arg[0];
    if ($#arg > 1) {
	for ($n = 1; $n <= $#arg - 1; $n++) { $arg .= " " . $arg[$n]; }
    }
    if ($arg !~ /^[0-9_ ^.*+?[\])\(-]*\$?$/ || $arg =~ /^\s*$/) {
	$results[0] = "That argument ($arg[0]) is not valid.\n";
	&print_results;
    }
    # pathetic excuses for lookups
    if ($arg =~ /^[_.* ^]*(\*|1|701|1239|1280|1740|3561|5462|10303)+[_\$]*$/ ||
	$arg =~ /^[_.* ^]*(1|701|1239|1280|1740|3561|5462|10303)+[_ .]*[\[*.]/) {
	$results[0] = "Get real.  Such a query has potential to over-burden our router.\nLook that up on your own router.\n";
	&print_results;
    }
    # escape any ()
    $arg =~ s/([\(\)])/\\$1/g;
} elsif ($type eq "damp" || $type eq "summary" || $type eq "mbgpsum") {
    undef($arg);
}

# cache the following
if ($type eq "summary" || $type eq "mbgpsu" || $type eq "damp" || $type eq "log") {
    if (!$arg) {
	# cache requests with no addr/argument
	local(*CACHE);

	my($file) = "$cache_dir/$type" ; 
	$file =~ s/\s+/_/g;
	$file .= "_$router";

	if (-e $file) {
	    # see if cache exists
	    @stat = stat($file); 
	    $ftime = $stat[9] ; 
	    $dtime = time - $stat[9] ; 

	    # see if we are within cache time 
	    if ($dtime <= $max_time_diff) {
		open(CACHE,"$file") ; 
		while () { push(@results, $_); }
		close CACHE ;
		$seconds = $dtime;
		&print_results ; 
	    }
	}

	# else, execute command and save to a new cache file
	open(CACHE,">$file") || die "couldnt create cache file $file" ; 

	@results = &DoRsh($router, $mfg, $type, $arg);

	print CACHE "@results";
	close CACHE ;
    } else {
	@results = &DoRsh($router, $mfg, $type, $arg);
    }
    &print_results ; 
} # end dampened-paths/flap-statistics

@results = &DoRsh($router, $mfg, $type, $arg);
&print_results ;

exit ;