#!@PERLV_PATH@
##
## hacked version of Hank's rancid - this one tries to deal with redbacks.
##
## Copyright (C) 1997 by Henry Kilmer.
## All rights reserved.
##
## This software may be freely copied, modified and redistributed without
## fee for non-commerical purposes provided that this copyright notice is
## preserved intact on all copies and modified copies.
##
## 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.
##
##
#
#  RANCID - Really Awesome New Cisco confIg Differ
#
# usage: rancid [-d] [-l] [-f filename | $host]
#
use Getopt::Std;
getopts('dflm');
$log = $opt_l;
$debug = $opt_d;
$file = $opt_f;
$host = $ARGV[0];
$clean_run = 0;
$found_end = 0;
$timeo = 90;			# clogin timeout in seconds

# 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 "dir /<fsys>"
sub DirFlash {
    print STDERR "    In DirFlash: $_" if ($debug);

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

	/(Can\'t open|No such device)/ && return;
	ProcessHistory("FLASH","keysort",$dev,"!Flash: $dev: $_");
    }
    ProcessHistory("FLASH","keysort",$dev,"!\n");
    return;
}

# This routine parses "show hardware"
sub ShowHardware {
    print STDERR "    In ShowHardware: $_" if ($debug);

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

	#ProcessHistory("","","","!Chassis: $_") && next;
	ProcessHistory("COMMENTS","keysort","B1","!Chassis: $_");
    }
    ProcessHistory("COMMENTS","keysort","B1","!\n");
    return;
}

# This routine parses "show version"
sub ShowVersion {
    print STDERR "    In ShowVersion: $_" if ($debug);

    while (<INPUT>) {
	tr/\015//d;
	last if(/^$prompt/);

	/(uptime|restarted|^\s*$)/ && next;
	ProcessHistory("COMMENTS","keysort","A1","!Image: $_");
    }
    return;
}

# This routine parses "show slot table"
sub ShowSlotTable {
    print STDERR "    In ShowSlotTable: $_" if ($debug);

    while (<INPUT>) {
	tr/\015//d;
	last if(/^$prompt/);

	/(Slot Table|^$)/ && next;
	s/^\s*//;
	ProcessHistory("COMMENTS","keysort","D1","!Slot Table: $_");
    }
    ProcessHistory("COMMENTS","keysort","D1","!\n");
    return;
}

# This routine processes a "write term"
sub WriteTerm {
    print STDERR "    In WriteTerm: $_" if ($debug);

    while (<INPUT>) {
	tr/\015//d;
	last if(/^$prompt/);

#    /Non-Volatile memory is in use/  && return(-1); # NvRAM is locked
	# Dog gone Cool matches to process the rest of the config
	/^! last updated: .*$/ && next; # kill last updated line
	/^ length / && next; # kill length on serial lines
	/^ width / && next; # kill width on serial lines
	# filter out any RCS/CVS tags to avoid confusing local CVS storage
	s/\$(Revision|Id):/ $1:/;
	# order access-lists
	/^access-list\s+(\d\d?)\s+(\S+)\s+(\S+)/ &&
        ProcessHistory("ACL $1 $2","ipsort","$3","$_") && next;
	ProcessHistory("","","","$_");
        # end of config
        if (/^end$/) {
            $found_end = 1;
            last;
	}
    }
    return;
}

# dummy function
sub DoNothing {print STDOUT;}

# Main subroutine that splits up the work
# All Subs return the name of the next function to use.
# If the sub returns a new funtion name, that name will be used
# else the main loop keeps using the current function
sub FlailHelplessly {
    print STDERR "Flailing: $_" if ($debug);
    print STDOUT "Flailing: $_" if ($log);
    /#(show hardware)$/ && delete($commands{$1}) && return("ShowHardware");
    /#(show version)$/ && delete($commands{$1}) && return("ShowVersion");
    /#(show slot table)$/ && delete($commands{$1}) && return("ShowSlotTable");
    /#(show config)$/ && delete($commands{$1}) && return("WriteTerm");
    return "FlailHelplessly";
}

# Main
%commands=(
	'show version'		=> "ShowVersion",
	"dir /flash"		=> "DirFlash",
	"dir /pcmcia0"		=> "DirFlash",
	"dir /pcmcia1"		=> "DirFlash",
	'show hardware'		=> "ShowHardware",
	'show slot table'	=> "ShowSlotTable",
	'show config'		=> "WriteTerm"
);
@commands=(
	"show version",
	"dir /flash",
	"dir /pcmcia0",
	"dir /pcmcia1",
	"show hardware",
	"show slot table",
	"show config"
);
# dir /flash
# dir /pcmcia0
# dir /pcmcia1

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

open(OUTPUT,">$host.new") || die "Can't open $host.new for writing: $!\n";
select(OUTPUT);
# make OUTPUT unbuffered
if ($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 -t $timeo -c\"$cisco_cmds\" $host\n" if ($debug);
    print STDOUT "executing clogin -t $timeo -c\"$cisco_cmds\" $host\n" if ($log);

    if (defined($ENV{NOPIPE})) {
	system "clogin -t $timeo -c \"$redback_cmds\" $host </dev/null > $host.raw" || die "clogin failed for $host: $!\n";
	open(INPUT, "< $host.raw") || die "clogin failed for $host: $!\n";
    } else {
	open(INPUT,"clogin -t $timeo -c \"$redback_cmds\" $host </dev/null |") || die "clogin failed for $host: $!\n";
    }
}

ProcessHistory("COMMENTS","keysort","B0","!\n");
ProcessHistory("COMMENTS","keysort","C0","!\n");
ProcessHistory("COMMENTS","keysort","E0","!\n");
while(<INPUT>) {
    tr/\015//d;
    if (/\#exit$/) {
	$clean_run=1;
	last;
    }
    if (/^Error:/) {
	print STDOUT ("$host clogin error: $_");
	print STDERR ("$host clogin error: $_") if ($debug);
	$clean_run=0;
	last;
    }
    while (/#\s*($cmds_regexp)\s*$/) {
	$cmd = $1;
	if (!defined($prompt)) {
	    $prompt = ($_ =~ /^([^#]*#)/)[0];
	    $prompt =~ s/([][])/\\$1/g; # quote the damn []'s
	}
	print STDERR ("HIT COMMAND:$_") if ($debug);
	if (! defined($commands{$cmd})) {
	    print STDERR "found unexpected command - \"$cmd\"\n";
	    $clean_run = 0;
	    last;
	}
	$rval = &{$commands{$cmd}};
	delete($commands{$cmd});
	if ($rval == -1) {
	    $clean_run = 0;
	    last;
	}
    }
}
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 "missed cmd(s): %s\n", join(',', keys(%commands)));
	printf(STDERR "missed cmd(s): %s\n", join(',', keys(%commands))) if ($debug);
    }
    if (!$clean_run || !$found_end) {
	print STDOUT "End of run not found\n";
	print STDERR "End of run not found\n" if ($debug);
	system("/usr/bin/tail -1 $host.new");
    }
    unlink "$host.new" if (! $debug);
}