#! /usr/bin/perl
##
##
## rancid 2.3.2a7
## Copyright (C) 1997-2006 by Terrapin Communications, Inc.
## All rights reserved.
##
## This software may be freely copied, modified and redistributed
## without fee for non-commerical purposes provided that this license
## remains intact and unmodified with any RANCID distribution.
##
## There is no warranty or other guarantee of fitness of this software.
## It is provided solely "as is".  The author(s) disclaim(s) all
## responsibility and liability with respect to this software's usage
## or its effect upon hardware, computer systems, other software, or
## anything else.
##
## Except where noted otherwise, rancid was written by and is maintained by
## Henry Kilmer, John Heasley, Andrew Partan, Pete Whiting, and Austin Schutz.
##
#
# Amazingly hacked version of Hank's rancid - this one tries to
# deal with Sygate Enforcer Appliance
#
# 
#  RANCID - Really Awesome New Cisco confIg Differ
#
# usage: rancid [-dV] [-l] [-f filename | hostname]
#
use Getopt::Std;
getopts('dflV');
if ($opt_V) {
    print "rancid 2.3.2a7\n";
    exit(0);
}
$log = $opt_l;
$debug = $opt_d;
$file = $opt_f;
$host = $ARGV[0];
$found_end = 0;
$timeo = 90;				# timeout in seconds
$login = selogin;

my(@commandtable, %commands, @commands);# command lists
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 $command))
	&& defined %history) {
	print eval "$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);
}

sub GetFile {
    print STDERR "    In GetFile: $_" if ($debug);
    while (<INPUT>) {
	last if(/$prompt/);
    }
    ProcessHistory("FILE","","","#\n");
    return(0);
}

sub GetStatus {
    print STDERR "    In GetStatus: $_" if ($debug);
    ProcessHistory("GetStatus","","","#Status\n");
    while (<INPUT>) {
        tr/\015//d;
        next if /^\s*$/;
	# Remove Packets 
        next if /^Packets/;
	# Remove Uptime
        # throw away the pager lines
        next if /^--- Press CTRL\+C to quit ---/;
        last if(/Enforcer Uptime/);
        ProcessHistory("GetStatus","","","$_");
    }
    return(1);
}

sub GetVersion {
    print STDERR "    In GetVersion: $_" if ($debug);
    ProcessHistory("GetVersion","","","#Version\n");
    while (<INPUT>) {
        tr/\015//d;
        next if /^\s*$/;
        # throw away the pager lines
        next if /^--- Press CTRL\+C to quit ---/;
        ProcessHistory("GetVersion","","","$_");
        last if(/mode$/);
    }
    return(1);
}


sub GetConsole {
    print STDERR "    In GetConsole: $_" if ($debug);
    ProcessHistory("GetConsole","","","#Console\n");
    while (<INPUT>) {
        tr/\015//d;
        next if /^\s*$/;
        # throw away the pager lines
        next if /^--- Press CTRL\+C to quit ---/;
	last if /^sshd/;
        ProcessHistory("GetVersion","","","$_");
    }
    return(1);
}

sub GetConf {
    print STDERR "    In GetConf: $_" if ($debug);
    ProcessHistory("GetConf","","","#Configure\n");
    while (<INPUT>) {
	tr/\015//d;
	next if /^\s*$/;
	next if /^Enforcer\$/i;
	next if /^Please waiting/i;
	# Remove transmit and Receive lines
        next if /[TR]X/;
	# throw away the pager lines
	next if /^--- Press CTRL\+C to quit ---/;
	# Remove the passwords man
        if (/^Preshared Secret:*/ && $filter_pwds >= 1 ) {
            ProcessHistory("GetConf","","",
		           "Preshared Secret:       <removed>\n");
            next;
        }
	ProcessHistory("GetConf","","","$_");
	last if /Preferred Group/;
    }
    $found_end=1;
    return(1);
}

# dummy function
sub DoNothing {print STDOUT;}

# Main
@commandtable = (
	{'show version'		=> 'GetVersion'},
	{'show status'		=> 'GetStatus'},
	{'show console'		=> 'GetConsole'},
	{'show configure'		=> '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("|",@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 $login -t $timeo -c\"$cisco_cmds\" $host\n" if ($debug);
    print STDOUT "executing $login -t $timeo -c\"$cisco_cmds\" $host\n" if ($log);
    if (defined($ENV{NOPIPE})) {
	system "$login -t $timeo -c \"$cisco_cmds\" $host </dev/null > $host.raw 2>&1" || die "$login failed for $host: $!\n";
	open(INPUT, "< $host.raw") || die "$login failed for $host: $!\n";
    } else {
	open(INPUT,"$login -t $timeo -c \"$cisco_cmds\" $host </dev/null |") || die "$login failed for $host: $!\n";
    }
}

# 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: sygateenforcer\n#\n");
TOP: while(<INPUT>) {
    tr/\015//d;
    if (/^Error:/) {
	print STDOUT ("$host $login error: $_");
	print STDERR ("$host $login error: $_") if ($debug);
	last;
    }
    while (/\$\s*($cmds_regexp)\s*$/) {
	$cmd = $1;
	if (!defined($prompt)) {
	    $prompt = ($_ =~ /^([^>]+\$)/)[0];
	    $prompt =~ s/([][}{)(\\])/\\$1/g;
	    print STDERR ("PROMPT MATCH: $prompt\n") if ($debug);
	}
	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 (!$found_end) {
	print STDOUT "$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);
}