#! /usr/local/bin/perl
##
##
## dlrancid 
##
## rancid 2.3.6
## Copyright (c) 1997-2008 by Terrapin Communications, Inc.
## All rights reserved.
##
## This code is derived from software contributed to and maintained by
## Terrapin Communications, Inc. by Henry Kilmer, John Heasley, Andrew Partan,
## Pete Whiting, Austin Schutz, and Andrew Fort.
##
## Redistribution and use in source and binary forms, with or without
## modification, are permitted provided that the following conditions
## are met:
## 1. Redistributions of source code must retain the above copyright
##    notice, this list of conditions and the following disclaimer.
## 2. Redistributions in binary form must reproduce the above copyright
##    notice, this list of conditions and the following disclaimer in the
##    documentation and/or other materials provided with the distribution.
## 3. All advertising materials mentioning features or use of this software
##    must display the following acknowledgement:
##        This product includes software developed by Terrapin Communications,
##        Inc. and its contributors for RANCID.
## 4. Neither the name of Terrapin Communications, Inc. nor the names of its
##    contributors may be used to endorse or promote products derived from
##    this software without specific prior written permission.
## 5. It is requested that non-binding fixes and modifications be contributed
##    back to Terrapin Communications, Inc.
##
## THIS SOFTWARE IS PROVIDED BY Terrapin Communications, INC. AND CONTRIBUTORS
## ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
## TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
## PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COMPANY OR CONTRIBUTORS
## BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
## CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
## SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
## INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
## CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
## ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
## POSSIBILITY OF SUCH DAMAGE.
# 
# A library built on Stephen Gill's Netscreen stuff to accomodate
# the Fortinet product line.  [d_pfleger @juniper.net]
# In turn massaged some more to accomodate the D-Link line of switches
#
#  RANCID - Really Awesome New Cisco confIg Differ
#
# usage: dlrancid [-dV] [-l] [-f filename | hostname]
#
use Getopt::Std;
getopts('dflV');
if ($opt_V) {
    print "rancid 2.3.6\n";
    exit(0);
}
$log = $opt_l;
$debug = $opt_d;
#$debug = 1;
$file = $opt_f;
$host = $ARGV[0];
$found_end = 0;
$timeo = 300;  			# dllogin timeout in seconds (some of these devices are remarkably slow to read config)

my( @commandtable, %commands,  @commands);# command lists
my($aclsort) = ("ipsort");		# ACL sorting mode
my($filter_commstr);			# SNMP community string filtering
my($filter_pwds);			# password filtering mode

# This routine is used to print out the router configuration
sub ProcessHistory {
    my($new_hist_tag,$new_command,$command_string, @string) = ( @_);
    if ((($new_hist_tag ne $hist_tag) || ($new_command ne $command))
	&& scalar(%history)) {
	print eval "$command \%history";
	undef %history;
    }
    if (($new_hist_tag) && ($new_command) && ($command_string)) {
	if ($history{$command_string}) {
	    $history{$command_string} = "$history{$command_string} @string";
	} else {
	    $history{$command_string} = " @string";
	}
    } elsif (($new_hist_tag) && ($new_command)) {
	$history{++$#history} = " @string";
    } else {
	print " @string";
    }
    $hist_tag = $new_hist_tag;
    $command = $new_command;
    1;
}

sub numerically { $a <=> $b; }

# This is a sort routine that will sort numerically on the
# keys of a hash as if it were a normal array.
sub keynsort {
    local(%lines) =  @_;
    local($i) = 0;
    local( @sorted_lines);
    foreach $key (sort numerically keys(%lines)) {
	$sorted_lines[$i] = $lines{$key};
	$i++;
    }
     @sorted_lines;
}

# This is a sort routine that will sort on the
# keys of a hash as if it were a normal array.
sub keysort {
    local(%lines) =  @_;
    local($i) = 0;
    local( @sorted_lines);
    foreach $key (sort keys(%lines)) {
	$sorted_lines[$i] = $lines{$key};
	$i++;
    }
     @sorted_lines;
}

# This is a sort routine that will sort on the
# values of a hash as if it were a normal array.
sub valsort{
    local(%lines) =  @_;
    local($i) = 0;
    local( @sorted_lines);
    foreach $key (sort values %lines) {
	$sorted_lines[$i] = $key;
	$i++;
    }
     @sorted_lines;
}

# This is a numerical sort routine (ascending).
sub numsort {
    local(%lines) =  @_;
    local($i) = 0;
    local( @sorted_lines);
    foreach $num (sort {$a <=> $b} keys %lines) {
	$sorted_lines[$i] = $lines{$num};
	$i++;
    }
     @sorted_lines;
}

# This is a sort routine that will sort on the
# ip address when the ip address is anywhere in
# the strings.
sub ipsort {
    local(%lines) =  @_;
    local($i) = 0;
    local( @sorted_lines);
    foreach $addr (sort sortbyipaddr keys %lines) {
	$sorted_lines[$i] = $lines{$addr};
	$i++;
    }
     @sorted_lines;
}

# These two routines will sort based upon IP addresses
sub ipaddrval {
    my( @a) = ($_[0] =~ m#^(\d+)\.(\d+)\.(\d+)\.(\d+)$#);
    $a[3] + 256 * ($a[2] + 256 * ($a[1] +256 * $a[0]));
}
sub sortbyipaddr {
    &ipaddrval($a) <=> &ipaddrval($b);
}

# This routine parses "get system"
sub GetSystem {
    print STDERR "    In GetSystem: $_" if ($debug);

    my $priv_key;
    while (<INPUT>) {
	tr/\015//d;
	next if /^\s*$/;
	last if (/$prompt/);

	#next if (/^System Time:/i);
	#next if (/^\s*Virus-DB: .*/);
	#next if (/^\s*Extended DB: .*/);
	#next if (/^\s*IPS-DB: .*/);
	#next if (/^FortiClient application signature package:/);
	ProcessHistory("","","","#$_");
    }
    ProcessHistory("SYSTEM","","","\n");
    return(0);
}

sub GetFile {
    print STDERR "    In GetFile: $_" if ($debug);

    while (<INPUT>) {
	last if (/$prompt/);
    }
    ProcessHistory("FILE","","","\n");
    return(0);
}

sub GetConf {
    print STDERR "    In GetConf: $_" if ($debug);
    my $password_counter=0;
    while (<INPUT>) {
	tr/\015//d;
	next if /^\s*$/;
	last if (/$prompt/);

	# filter variabilities between configurations.  password encryption
	# upon each display of the configuration.
	#if (/^\s*(set [^\s]*)\s(Enc\s[^\s]+)(.*)/i && $filter_pwds > 0 ) {
	#    ProcessHistory("ENC","","","#$1 ENC <removed> $3\n");
	#    next;
	#}
	# if filtering passwords, note that we're on an opening account line
        # next two lines will be passwords
	if (/^create account / && $filter_pwds > 0 ) {
              $password_counter=2;
	      ProcessHistory("","","","#$_");
              next;
	}
	elsif ($password_counter > 0) {
              $password_counter--;
	      ProcessHistory("","","","<removed>\n");
              next;
	}
	ProcessHistory("","","","$_");
    }
    $found_end = 1;
    return(1);
}

# dummy function
sub DoNothing {print STDOUT;}

# Main
 @commandtable = (
#	{'show switch'		=> 'GetSystem'},
	{'show config current_config'	=> 'GetConf'}
);
# Use an array to preserve the order of the commands and a hash for mapping
# commands to the subroutine and track commands that have been completed.
 @commands = map(keys(%$_),  @commandtable);
%commands = map(%$_,  @commandtable);

$cisco_cmds=join(";", @commands);
$cmds_regexp = join("|", map quotemeta($_),  @commands);

if (length($host) == 0) {
    if ($file) {
	print(STDERR "Too few arguments: file name required\n");
	exit(1);
    } else {
	print(STDERR "Too few arguments: host name required\n");
	exit(1);
    }
}
open(OUTPUT,">$host.new") || die "Can't open $host.new for writing: $!\n";
select(OUTPUT);
# make OUTPUT unbuffered if debugging
if ($debug) { $| = 1; }

if ($file) {
    print STDERR "opening file $host\n" if ($debug);
    print STDOUT "opening file $host\n" if ($log);
    open(INPUT,"<$host") || die "open failed for $host: $!\n";
} else {
    print STDERR "executing dllogin -t $timeo -c\"$cisco_cmds\" $host\n" if ($debug);
    print STDOUT "executing dllogin -t $timeo -c\"$cisco_cmds\" $host\n" if ($log);
    if (defined($ENV{NOPIPE})) {
	system "dllogin -t $timeo -c \"$cisco_cmds\" $host </dev/null > $host.raw 2>&1" || die "dllogin failed
for $host: $!\n";
	open(INPUT, "< $host.raw") || die "dllogin failed for $host: $!\n";
    } else {
	open(INPUT,"dllogin -t $timeo -c \"$cisco_cmds\" $host </dev/null |") || die "dllogin failed for
$host: $!\n";
    }
}

# determine ACL sorting mode
if ($ENV{"ACLSORT"} =~ /no/i) {
    $aclsort = "";
}
# determine community string filtering mode
if (defined($ENV{"NOCOMMSTR"}) &&
    ($ENV{"NOCOMMSTR"} =~ /yes/i || $ENV{"NOCOMMSTR"} =~ /^$/)) {
    $filter_commstr = 1;
} else {
    $filter_commstr = 0;
}
# determine password filtering mode
if ($ENV{"FILTER_PWDS"} =~ /no/i) {
    $filter_pwds = 0;
} elsif ($ENV{"FILTER_PWDS"} =~ /all/i) {
    $filter_pwds = 2;
} else {
    $filter_pwds = 1;
}

ProcessHistory("","","","#RANCID-CONTENT-TYPE: D-Link\n\n");
TOP: while(<INPUT>) {
    tr/\015//d;
    if (/^Error:/) {
	print STDOUT ("$host dllogin error: $_");
	print STDERR ("$host dllogin error: $_") if ($debug);
	last;
    }
    while (/^.+(#|\$)\s*($cmds_regexp)\s*$/) {
	$cmd = $2;
	# - FortiGate prompts end with either '#' or '$'. Further, they may
	# be prepended with a '~' if the hostname is too long. Therefore, 
	# we need to figure out what our prompt really is.
#	if (!defined($prompt)) {
#	    if ($_ =~ m/^.+\~\$/) {
#		$prompt = '\~\$ .*';
#	    } else {
#		if ($_ =~ m/^.+\$/) {
#		    $prompt = ' \$ .*';
#		} else {
#		    if ($_ =~ m/^.+\~#/) {
#			$prompt = '\~# .*';
#		    } else {
			if ($_ =~ m/^.+#/) {
			    $prompt = '.+##.*';
			}
#		    }
#		}
#	    }
#	}
	print STDERR ("HIT COMMAND:$_") if ($debug);
	if (!defined($commands{$cmd})) {
	    print STDERR "$host: found unexpected command - \"$cmd\"\n";
	    last TOP;
	}
	$rval = &{$commands{$cmd}};
	delete($commands{$cmd});
	if ($rval == -1) {
	    last TOP;
	}
    }
}
print STDOUT "Done $logincmd: $_\n" if ($log);
# Flush History
ProcessHistory("","","","");
# Cleanup
close(INPUT);
close(OUTPUT);

if (defined($ENV{NOPIPE})) {
    unlink("$host.raw") if (! $debug);
}

# check for completeness
if (scalar(%commands) || !$found_end) {
    if (scalar(%commands)) {
	printf(STDOUT "$host: missed cmd(s): %s\n", join(',', keys(%commands)));
	printf(STDERR "$host: missed cmd(s): %s\n", join(',', keys(%commands))) if ($debug);
    }
    if (!$found_end) {
	print STDOUT "$found_end: found end\n";
	print STDOUT "$host: End of run not found\n";
	print STDERR "$host: End of run not found\n" if ($debug);
	system("/usr/bin/tail -1 $host.new");
    }
    unlink "$host.new" if (! $debug);
}