From: Ted Lemon <source@isc.org>
Date: Wed, 18 Apr 2001 19:17:34 +0000 (+0000)
Subject: Convert 3.0b1 lease to current.
X-Git-Tag: V3-0-3-PBSG0~2^2
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=ca53ccc8be6059d5a0c6ab4275331ed19117cf6f;p=thirdparty%2Fdhcp.git

Convert 3.0b1 lease to current.
---

diff --git a/contrib/3.0b1-lease-convert b/contrib/3.0b1-lease-convert
new file mode 100755
index 000000000..049a3a7a9
--- /dev/null
+++ b/contrib/3.0b1-lease-convert
@@ -0,0 +1,126 @@
+#!/usr/bin/perl
+#
+# Start Date:   Mon, 26 Mar 2001 14:24:09 +0200
+# Time-stamp:   <Monday, 26 March 2001 16:09:44 by brister>
+# File:         leaseconvertor.pl
+# RCSId:        $Id: 3.0b1-lease-convert,v 1.1 2001/04/18 19:17:34 mellon Exp $
+#
+# Description:  Convert 3.0b1 to 3.0b2/final lease file format
+#
+
+require 5.004;
+
+my $rcsID =<<'EOM';
+$Id: 3.0b1-lease-convert,v 1.1 2001/04/18 19:17:34 mellon Exp $
+EOM
+
+use strict;
+
+my $revstatement =<<'EOS';
+	  switch (ns-update (delete (1, 12, ddns-rev-name, null))) {
+	    case 0:
+	      unset ddns-rev-name;
+	      break;
+	  }
+EOS
+
+my $fwdstatement =<<'EOS';
+	  switch (ns-update (delete (1, 1, ddns-fwd-name, leased-address))) {
+	    case 0:
+	      unset ddns-fwd-name;
+	      break;
+	  }
+EOS
+
+
+if (@ARGV && $ARGV[0] =~ m!^-!) {
+    usage();
+}
+
+
+
+# read stdin and write stdout.
+while (<>) {
+    if (! /^lease\s/) {
+	print;
+    } else {
+	my $lease = $_;
+	while (<>) {
+	    $lease .= $_;
+	    # in a b1 file we should only see a left curly brace on a lease
+	    # lines. Seening it anywhere else means the user is probably
+	    # running a b2 or later file through this.
+	    # Ditto for a 'set' statement.
+	    if (m!\{! || m!^\s*set\s!) {
+		warn "this doesn't look like a 3.0b1 file. Ignoring rest.\n";
+		print $lease;
+		dumpRestAndExit();
+	    }
+
+	    last if m!^\}\s*$!;
+	}
+
+	# $lease contains all the lines for the lease entry.
+	$lease = makeNewLease($lease);
+	print $lease;
+    }
+}
+
+
+
+sub usage {
+    my $prog = $0;
+    $prog =~ s!.*/!!;
+
+    print STDERR <<EOM;
+usage: $prog [ file ]
+
+Reads from the lease file listed on the command line (or stdin if not filename
+given) and writes to stdout.  Converts a 3.0b1-style leases file to a 3.0b2
+style (for ad-hoc ddns updates).
+EOM
+
+    exit (0);
+}
+
+
+
+# takes a string that's the lines of a lease entry and converts it, if
+# necessary to a b2 style lease entry. Returns the new lease in printable form.
+sub makeNewLease {
+    my ($lease) = @_;
+
+    my $convertedfwd;
+    my $convertedrev;
+    my $newlease = "";
+    foreach (split "\n", $lease) {
+	if (m!^(\s+)(ddns-fwd-name|ddns-rev-name)\s+(\"[^\"]+\"\s*;)!) {
+	    $newlease .= $1 . "set " . $2 . " = " . $3 . "\n";
+
+	    # If there's one of them, then it will always be the -fwd-. There
+	    # may not always be a -rev-.
+	    $convertedfwd++;
+	    $convertedrev++ if ($2 eq "ddns-rev-name");
+	} elsif (m!^\s*\}!) {
+	    if ($convertedfwd) {
+		$newlease .= "\ton expiry or release {\n";
+		$newlease .= $revstatement if $convertedrev;
+		$newlease .= $fwdstatement;
+		$newlease .= "\t  on expiry or release;\n\t}\n";
+	    }
+	    $newlease .= "}\n";
+	} else {
+	    $newlease .= $_ . "\n";
+	}
+    }
+
+    return $newlease;
+}
+
+
+sub dumpRestAndExit {
+    while (<>) {
+	print;
+    }
+    exit (0);
+}