#!@PERLV_PATH@
##
##
## Copyright (C) 1997-2001 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 "show version"
sub ShowVersion {
    print STDERR "    In ShowVersion: $_" if ($debug);

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

	/^\S+ Serial Number:/i &&
	    ProcessHistory("COMMENTS","keysort","A0","#$_") && next;
	/^(\S+) Power Supply ([^:]+):\s+(.*)/i &&
	    ProcessHistory("COMMENTS","keysort","B0","#Power: $1 $2 $3\n")
	    && next;
	/^Image\s*:\s*(.*)/i &&
	    ProcessHistory("COMMENTS","keysort","C0","#Image: $1\n")
	    && next;
#heas: need to collect this from show vers for ShowSlot where rev #s are excluded
#SLOT 1 :  702005-06  0025S-00877 CPLD Rev <FF>
#SLOT 2 :  702005-06  0021S-00131 CPLD Rev 02
#SLOT 3 :  702009-06  0024S-00170 CPLD Rev <FF>
#SLOT 4 :  702009-06  0024S-00319 CPLD Rev <FF>
    }
    return(0);
}

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

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

	/^Total DRAM Size: (.*)/ &&
	    ProcessHistory("COMMENTS","keysort","A0","#\n#Memory: $1\n")
    }
    return(0);
}

# This routine parses "show install active"
sub ShowSlot {
    print STDERR "    In ShowSlot: $_" if ($debug);

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

	if (/^Slot\s+(\d+)\s+/i) {
	    my($slot) = $1;
	    my($hwtype, $conftype, $sn, $state);
	    ProcessHistory("SLOT","keysort","$slot","#\n");
	    while (<INPUT>) {
		tr/\015//d;
		last if (/^$prompt/ || /^\s*$/);
		if (/State:\s+(.*)$/i) { $state = $1; }
		if (/serial number:\s+(.*)$/i) { $sn = $1; }
		if (/hw module type:\s+(.*)$/i) { $hwtype = $1; }
		if (/configured type:\s+(.*)$/i) { $conftype = $1; }
	    }
	    ProcessHistory("SLOT","keysort","$slot","#Slot $slot: type $hwtype,"
		. " $conftype\n#Slot $slot: serial $sn\n#Slot $slot: state "
		. " $state\n");
	    return if (/^$prompt/);
	    next;
	}
    }
    return(0);
}

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

    while (<INPUT>) {
	tr/\015//d;
	last if(/^$prompt/);
	next if(/^\s*$/);
	# the pager can not be disabled per-session on the PIX
	s/^<-+ More -+>\s*//;

	# Dog gone Cool matches to process the rest of the config
	/^(# \S+ Configuration) generated/i &&
	    ProcessHistory("","","","$1\n") && next;
	/^(config bgp (neighbor|peer-group) \S+ password encrypted)/i &&
	    ProcessHistory("","","","# $1 <removed>\n") &&
	    next;
#	/^( ip ospf authentication-key) / &&
#	    ProcessHistory("","","","!$1 <removed>\n") && next;
#	/^( ip ospf message-digest-key \d+ md5) / &&
#	    ProcessHistory("","","","!$1 <removed>\n") && next;
#	# sort route-maps
#	if (/^route-map (\S+)/) {
#	    my($key) = $1;
#	    my($routemap) = $_;
#	    while (<INPUT>) {
#		tr/\015//d;
#		last if (/^$prompt/ || ! /^(route-map |[ !])/);
#		if (/^route-map (\S+)/) {
#		    ProcessHistory("ROUTEMAP","keysort","$key","$routemap");
#		    $key = $1;
#		    $routemap = $_;
#		} else  {
#		    $routemap .= $_;
#		}
#	    }
#	    ProcessHistory("ROUTEMAP","keysort","$key","$routemap");
#	}
	# 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;
#	# order extended access-lists
#	/^access-list\s+(\d\d\d)\s+(\S+)\s+ip\s+host\s+(\S+)/ &&
#	    ProcessHistory("EACL $1 $2","ipsort","$3","$_") && next;
#	/^access-list\s+(\d\d\d)\s+(\S+)\s+ip\s+(\d\S+)/ &&
#	    ProcessHistory("EACL $1 $2","ipsort","$3","$_") && next;
#	/^access-list\s+(\d\d\d)\s+(\S+)\s+ip\s+any/ &&
#	    ProcessHistory("EACL $1 $2","ipsort","0.0.0.0","$_") && next;
#	# order arp lists
#	/^arp\s+(\d+\.\d+\.\d+\.\d+)\s+/ &&
#	    ProcessHistory("ARP","ipsort","$1","$_") && next;
#	/^ip prefix-list\s+(\S+)\s+seq\s+(\d+)\s+(permit|deny)\s+(\d\S+)(\/.*)$/ &&
#	    ProcessHistory("PACL $1 $3","ipsort","$4","ip prefix-list $1 $3 $4$5\n")
#	    && next;

	# order logging statements
	/^configure syslog add logging (\d+\.\d+\.\d+\.\d+)/ &&
	    ProcessHistory("LOGGING","ipsort","$1","$_") && next;
	# order/prune snmp-server host statements
	# we only prune lines of the form

	# configure snmp add trapreceiver a.b.c.d <community>
	if (/^(configure snmp add trapreceiver )(\d+\.\d+\.\d+\.\d+) (community) \S+ (.*)/) {
	    if (defined($ENV{'NOCOMMSTR'})) {
		ProcessHistory("SNMPSVRHOST","ipsort","$2","# $1$2 $3 <removed> $4\n");
	    } else {
		ProcessHistory("SNMPSVRHOST","ipsort","$2","$_\n");
	    }
	    next;
	}
	if (/^(configure snmp add community (readonly|readwrite) \S+) (\S+)/) {
	    if (defined($ENV{'NOCOMMSTR'})) {
		ProcessHistory("SNMPSVRCOMM","keysort","$_","#$1 <removed>$'");
		next;
	    } else {
		ProcessHistory("SNMPSVRCOMM","keysort","$_","$_") && next;
	    }
	}
	# order/prune tacacs/radius server statements
	/^(configure radius (primary|secondary) (tacacs-server|radius-server) shared-secret encrypted)/ &&
	    ProcessHistory("","","","# $1 <removed>\n") && next;

	# catch anything that wasnt match above.
	ProcessHistory("","","","$_");
	# end of config
	if (/^# End of configuration file/i) {
	    printf STDERR "    End WriteTerm: $_" if ($debug);
	    $found_end = 1;
	    return(1);
	}
    }
    return(0);
}

# dummy function
sub DoNothing {print STDOUT;}

# Main
%commands=(
	'show version'		=> "ShowVersion",
	'show memory'		=> "ShowMemory",
	'show slot'		=> "ShowSlot",
	'show configuration'	=> "WriteTerm"
);
# keys() doesnt return things in the order entered and the order of the
# cmds is important (show version first and write term last). pita
@commands=(
	"show version",
	"show memory",
	"show slot",
	"show configuration"
);
$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 -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 $timeo -c \"$cisco_cmds\" $host </dev/null > $host.raw 2>&1" || die "clogin failed for $host: $!\n";
	open(INPUT, "< $host.raw") || die "clogin failed for $host: $!\n";
    } else {
	open(INPUT,"clogin -t $timeo -c \"$cisco_cmds\" $host </dev/null |") || die "clogin failed for $host: $!\n";
    }
}

ProcessHistory("","","","#RANCID-CONTENT-TYPE: extreme\n#\n");
ProcessHistory("COMMENTS","keysort","B0","#\n");	# power supply info
ProcessHistory("COMMENTS","keysort","C0","#\n");	# image name
#ProcessHistory("COMMENTS","keysort","G0","#\n");
TOP: while(<INPUT>) {
    tr/\015//d;
    # note: this match sucks rocks, but the currently the extreme bits are
    # unreliable about echoing the 'exit\n' command.  this match might really
    # be a bad idea, but instead rely upon WriteTerm's found_end?
    if (/$prompt\s?(exit$|Connection closed)/ && $found_end) {
	$clean_run=1;
	last;
    }
    if (/^Error:/) {
	print STDOUT ("$host clogin error: $_");
	print STDERR ("$host clogin error: $_") if ($debug);
	$clean_run=0;
	last;
    }
    while (/$prompt\s*($cmds_regexp)\s*$/) {
	$cmd = $1;
	if (!defined($prompt)) {
	    $prompt = ($_ =~ /^([^#]+#)/)[0];
	    $prompt =~ s/:(\d+ ?)#/:\\d+ ?#/;
	    print STDERR ("PROMPT MATCH:$prompt\n") if ($debug);
	}
	print STDERR ("HIT COMMAND:$_") if ($debug);
	if (! defined($commands{$cmd})) {
	    print STDERR "found unexpected command - \"$cmd\"\n";
	    $clean_run = 0;
	    last TOP;
	}
	$rval = &{$commands{$cmd}};
	delete($commands{$cmd});
	if ($rval == -1) {
	    printf STDERR "rval = -1\n" if (debug);
	    $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 "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);
}