#! @PERLV_PATH@
##
## $Id$
##
## @PACKAGE@ @VERSION@
## 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.
#
#  RANCID - Really Awesome New Cisco confIg Differ
#
# usage: rancid [-dV] [-l] [-f filename | $host]
#
# Modified by Ed Ravin for Netopia.
use Getopt::Std;
getopts('dflV');
if ($opt_V) {
    print "@PACKAGE@ @VERSION@\n";
    exit(0);
}
$log = $opt_l;
$debug = $opt_d;
$file = $opt_f;
$host = $ARGV[0];
$clean_run = 0;
$found_end = 0;
$found_version = 0;
$found_env = 0;
$found_diag = 0;
$timeo = 90;			# clogin timeout in seconds
$clogin_pgm= $ENV{'RANCID_CLOGIN'} || "tlogin";

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 routing 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 routing 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 routing 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 routing (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 "show version"
sub ShowVersion {
    print STDERR "    In ShowVersion: $_" if ($debug);

    while (<INPUT>) {
	tr/\015//d;
	if (/^$prompt/) { $found_version=1; last};
	next if(/^(\s*|\s*$cmd\s*)$/);
	return(1) if /(Invalid input detected|Type help or )/;
	return(-1) if (/command authorization failed/i);
	return(0) if ($found_version);		# Only do this routine once

	# no pagers in Netopia-land, but shouldn't hurt
	s/^<-+ More -+>\s*//;

### sample output:
### #show version
### cli      version:  01.00d00
### firmware version:  05.03.09f06
### hardware version:  01.00f00
### mib      version:  01.00f00
### html     version:  01.01d07

	ProcessHistory("COMMENTS","keysort","A1","# $_");
	}
	
    return(0);
}

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

    while (<INPUT>) {
	tr/\015//d;
	if (/^$prompt/) { $found_end=1; $clean_run=1; return 0};
	next if(/^(\s*|\s*$cmd\s*)$/);
	return(1) if /(Invalid input detected|Type help or )/;
	return(-1) if (/command authorization failed/i);

	# no pagers in Netopia-land, but shouldn't hurt
	s/^<-+ More -+>\s*//;

	# no post-processing needed - just file it
	ProcessHistory("","","","$_");
	}
}


# dummy function
sub DoNothing {print STDOUT;}

# Main
@commandtable=(
	{'show version'		=> "ShowVersion"},
	{'show config'		=> "ShowConfig"},
);

# Use array to preserve order of commands, and hash for mapping to subroutine
my (%commands, @commands);
foreach (@commandtable) {
	push @commands, (keys(%{$_}))[0];
	$commands{$commands[$#commands]}= (values(%{$_}))[0];
};

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

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 $clogin_pgm -t $timeo -c\"$cisco_cmds\" $host\n" if ($debug);
    print STDOUT "executing $clogin_pgm -t $timeo -c\"$cisco_cmds\" $host\n" if ($log);
    if (defined($ENV{NOPIPE})) {
	system "$clogin_pgm -t $timeo -c \"$cisco_cmds\" $host </dev/null > $host.raw 2>&1" || die "$clogin_pgm failed for $host: $!\n";
	open(INPUT, "< $host.raw") || die "$clogin_pgm failed for $host: $!\n";
    } else {
	open(INPUT,"$clogin_pgm -t $timeo -c \"$cisco_cmds\" $host </dev/null |") || die "$clogin_pgm 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: netopia\n#\n");
ProcessHistory("COMMENTS","keysort","B0","#\n");
ProcessHistory("COMMENTS","keysort","D0","#\n");
ProcessHistory("COMMENTS","keysort","F0","#\n");
ProcessHistory("COMMENTS","keysort","G0","#\n");
TOP: while(<INPUT>) {
    tr/\015//d;
    if (/[>#]\s?exit$/) {
	$clean_run=1;
	last;
    }
    if (/^Error:/) {
	print STDOUT ("$host $clogin_pgm error: $_");
	print STDERR ("$host $clogin_pgm error: $_") if ($debug);
	$clean_run=0;
	last;
    }
    while (/#\s*($cmds_regexp)\s*$/) {
	$cmd = $1;
	if (!defined($prompt)) {
	    $prompt = "#";  # crude but effective
	    $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";
	    $clean_run = 0;
	    last TOP;
	}
	$rval = &{$commands{$cmd}};
	delete($commands{$cmd});
	if ($rval == -1) {
	    $clean_run = 0;
	    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) || !$clean_run || !$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 ($debug);
    }
    if (!$clean_run || !$found_end) {
	print STDOUT "$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);
}