src/plugins/bind.sml

(* HCoop Domtool (http://hcoop.sourceforge.net/)
 * Copyright (c) 2006, Adam Chlipala
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 *)

(* BIND DNS *)

structure Bind :> BIND = struct

open Ast

val namedChanged = ref false
val zoneChanged = ref false

val didDomain = ref ""

val () = Slave.registerPreHandler (fn () => (namedChanged := false;
					     zoneChanged := false;
					     didDomain := ""))

val dns : Domain.files option ref = ref NONE

val _ = Domain.registerBefore
	    (fn _ => dns := Option.map (fn node => Domain.domainsFile {node = node,
								       name = "dns"})
				       (Domain.dnsMaster ()))

val _ = Domain.registerAfter
	    (fn _ => (Option.app (fn files => #close files ()) (!dns);
		      dns := NONE))

val dl = ErrorMsg.dummyLoc

datatype dns_record =
	 A of string * string
       | CNAME of string * string
       | MX of int * string
       | NS of string
       | DefaultA of string
       | AAAA of string * string
       | DefaultAAAA of string
       | TXT of string * string
       | DefaultTXT of string
       | AFSDB of string
       | SRV of string * int * int * int * string

val record = fn (EApp ((EApp ((EVar "dnsA", _), e1), _), e2), _) =>
		(case (Env.string e1, Domain.ip e2) of
		     (SOME v1, SOME v2) => SOME (A (v1, v2))
		   | _ => NONE)
	      | (EApp ((EApp ((EVar "dnsCNAME", _), e1), _), e2), _) =>
		(case (Env.string e1, Env.string e2) of
		     (SOME v1, SOME v2) => SOME (CNAME (v1, v2))
		   | _ => NONE)
	      | (EApp ((EApp ((EVar "dnsMX", _), e1), _), e2), _) =>
		(case (Env.int e1, Env.string e2) of
		     (SOME v1, SOME v2) => SOME (MX (v1, v2))
		   | _ => NONE)
	      | (EApp ((EVar "dnsNS", _), e), _) =>
		Option.map NS (Env.string e)
	      | (EApp ((EVar "dnsDefaultA", _), e), _) =>
		Option.map DefaultA (Domain.ip e)
	      | (EApp ((EApp ((EVar "dnsAAAA", _), e1), _), e2), _) =>
		(case (Env.string e1, Env.string e2) of
		     (SOME v1, SOME v2) => SOME (AAAA (v1, v2))
		   | _ => NONE)
	      | (EApp ((EVar "dnsDefaultAAAA", _), e), _) =>
		Option.map DefaultAAAA (Env.string e)
	      | (EApp ((EApp ((EVar "dnsTXT", _), e1), _), e2), _) =>
		(case (Env.string e1, Env.string e2) of
		     (SOME v1, SOME v2) => SOME (TXT (v1, v2))
		   | _ => NONE)
	      | (EApp ((EVar "dnsDefaultTXT", _), e), _) =>
		Option.map DefaultTXT (Env.string e)
	      | (EApp ((EVar "dnsAFSDB", _), e), _) =>
		Option.map AFSDB (Env.string e)
	      | (EApp ((EApp ((EApp ((EApp ((EApp ((EVar "dnsSRV", _), e1), _), e2), _), e3), _), e4), _), e5), _) =>
		(case (Env.string e1, Env.int e2, Env.int e3, Env.int e4, Env.string e5) of
		     (SOME v1, SOME v2, SOME v3, SOME v4, SOME v5) => SOME (SRV (v1, v2, v3, v4, v5))
		   | _ => NONE)
	      | _ => NONE

fun writeRecord (evs, r) =
    case !dns of
	NONE => print ("Warning: DNS directive for " ^ Domain.currentDomain ()
		       ^ " ignored because no master DNS server is configured for this domain\n")
      | SOME files =>
	let
	    fun write s = #write files s
	    fun writeDom () = #writeDom files ()
	    val ttl = Env.env Env.int (evs, "TTL")
	in
	    case r of
		A (from, to) => (write from;
				 write ".";
				 writeDom ();
				 write ".\t";
				 write (Int.toString ttl);
				 write "\tIN\tA\t";
				 write to;
				 write "\n")
	      | DefaultA to => (writeDom ();
				write ".\t";
				write (Int.toString ttl);
				write "\tIN\tA\t";
				write to;
				write "\n")
	      | CNAME (from, to) => (write from;
				     write ".";
				     writeDom ();
				     write ".\t";
				     write (Int.toString ttl);
				     write "\tIN\tCNAME\t";
				     write to;
				     write ".\n")
	      | MX (num, host) => (writeDom ();
				   write ".\t";
				   write (Int.toString ttl);
				   write "\tIN\tMX\t";
				   write (Int.toString num);
				   write "\t";
				   write host;
				   write ".\n")
	      | NS host => (writeDom ();
			    write ".\t";
			    write (Int.toString ttl);
			    write "\tIN\tNS\t";
			    write host;
			    write ".\n")
	      | AAAA (from, to) => (write from;
				    write ".";
				    writeDom ();
				    write ".\t";
				    write (Int.toString ttl);
				    write "\tIN\tAAAA\t";
				    write to;
				    write "\n")
	      | DefaultAAAA to => (writeDom ();
				   write ".\t";
				   write (Int.toString ttl);
				   write "\tIN\tAAAA\t";
				   write to;
				   write "\n")
	      | TXT (from, to) => (write from;
				   write ".";
				   writeDom ();
				   write ".\t";
				   write (Int.toString ttl);
				   write "\tIN\tTXT\t\"";
				   write (String.translate (fn #"\"" => "\\\"" | ch => str ch) to);
				   write "\"\n")
	      | DefaultTXT to => (writeDom ();
				  write ".\t";
				  write (Int.toString ttl);
				  write "\tIN\tTXT\t\"";
				  write (String.translate (fn #"\"" => "\\\"" | ch => str ch) to);
				  write "\"\n")
	      | AFSDB host => (writeDom ();
			       write ".\t";
			       write (Int.toString ttl);
			       write "\tIN\tAFSDB\t";
			       write "1";
			       write "\t";
			       write host;
			       write ".\n")
	      | SRV (from, priority, weight, port, to) => (write from;
							   write ".";
							   writeDom ();
							   write ".\t";
							   write (Int.toString ttl);
							   write "\tIN\tSRV\t";
							   write (Int.toString priority);
							   write "\t";
							   write (Int.toString weight);
							   write "\t";
							   write (Int.toString port);
							   write "\t";
							   write to;
							   write ".\n")
	end

val () = Env.actionV_one "dns"
			 ("record", record)
			 writeRecord

fun readLine inf =
    case TextIO.inputLine inf of
	NONE => raise Fail "Expected a line for BIND"
      | SOME s => String.substring (s, 0, size s - 1)

fun readILine inf = valOf (Int.fromString (readLine inf))

val monthToInt = fn Date.Jan => 1
		  | Date.Feb => 2
		  | Date.Mar => 3
		  | Date.Apr => 4
		  | Date.May => 5
		  | Date.Jun => 6
		  | Date.Jul => 7
		  | Date.Aug => 8
		  | Date.Sep => 9
		  | Date.Oct => 10
		  | Date.Nov => 11
		  | Date.Dec => 12

fun padBy ch amt s =
    if size s < amt then
	CharVector.tabulate (amt - size s, fn _ => ch) ^ s
    else
	s

fun dateString () =
    let
	val date = Date.fromTimeUniv (Time.now ())
    in
	padBy #"0" 4 (Int.toString (Date.year date))
	^ padBy #"0" 2 (Int.toString (monthToInt (Date.month date)))
	^ padBy #"0" 2 (Int.toString (Date.day date))
    end

val () = Slave.registerFileHandler (fn fs =>
				       let
					   val {dir, file} = OS.Path.splitDirFile (#file fs)

					   fun dnsChanged () =
					       if #domain fs = !didDomain then
						   ()
					       else if Slave.isDelete (#action fs) then
						   let
						       val fname = OS.Path.joinBaseExt {base = #domain fs,
											ext = SOME "zone"}
						       val fname = OS.Path.joinDirFile {dir = Config.Bind.zonePath,
											file = fname}
						   in
						       Slave.shellF ([Config.rm, " -f ", fname],
								  fn cl => "Error deleting file: " ^ cl)
						   end
					       else
						   let
						       val inf = TextIO.openIn (OS.Path.joinDirFile {dir = #dir fs,
												     file = "soa"})
						       val kind = readLine inf
						       val ttl = readILine inf
						       val ns = readLine inf
						       val serial = case readLine inf of
									"" => NONE
								      | s => Int.fromString s
						       val rf = readILine inf
						       val ret = readILine inf
						       val exp = readILine inf
						       val min = readILine inf
						       val () = TextIO.closeIn inf

						       val serialPath = OS.Path.joinDirFile {dir = Config.serialDir,
											     file = #domain fs}

						       val oldSerial = let
							   val inf = TextIO.openIn serialPath
						       in
							   SOME (readLine inf)
							   before TextIO.closeIn inf
						       end handle IO.Io {name, ...} => NONE

						       val newSerial =
							   case serial of
							       SOME n => Int.toString n
							     | NONE =>
							       let
								   val prefix = dateString ()
							       in
								   prefix
								   ^ (case oldSerial of
									  NONE => "00"
									| SOME old =>
									  if size old >= 8 andalso
									     String.substring (old, 0, 8) = prefix then
									      case Int.fromString (String.extract (old, 8, NONE)) of
										  NONE => "00"
										| SOME old => padBy #"0" 2 (Int.toString (old+1))
									  else
									      "00")
							       end

						       val outf = TextIO.openOut serialPath
						       val _ = TextIO.output (outf, newSerial)
						       val _ = TextIO.closeOut outf

						       val dns = OS.Path.joinDirFile {dir = #dir fs,
										      file = "dns"}

						       val fname = OS.Path.joinBaseExt {base = #domain fs,
											ext = SOME "zone"}
						       val fname = OS.Path.joinDirFile {dir = Config.Bind.zonePath,
											file = fname}

						       val outf = TextIO.openOut fname
						   in
						       zoneChanged := true;
						       TextIO.output (outf, "$TTL ");
						       TextIO.output (outf, Int.toString ttl);
						       TextIO.output (outf, "\n\n@\tIN\tSOA\t");
						       TextIO.output (outf, ns);
						       TextIO.output (outf, ".\thostmaster.");
						       TextIO.output (outf, #domain fs);
						       TextIO.output (outf, ". ( ");
						       TextIO.output (outf, newSerial);
						       TextIO.output (outf, " ");
						       TextIO.output (outf, Int.toString rf);
						       TextIO.output (outf, " ");
						       TextIO.output (outf, Int.toString ret);
						       TextIO.output (outf, " ");
						       TextIO.output (outf, Int.toString exp);
						       TextIO.output (outf, " ");
						       TextIO.output (outf, Int.toString min);
						       TextIO.output (outf, " )\n\n");
						       TextIO.closeOut outf;
						       if Posix.FileSys.access (dns, []) then
							   Slave.shellF ([Config.cat, " ", dns, " >>", fname],
								      fn cl => "Error concatenating file: " ^ cl)
						       else
							   ();
						       didDomain := #domain fs
						   end
				       in
					   case file of
					       "soa" => dnsChanged ()
					     | "dns" => dnsChanged ()
					     | "named.conf" => namedChanged := true
					     | _ => ()
				       end)

val () = Slave.registerPostHandler
	     (fn () =>
		 (if !namedChanged then
		      Slave.concatTo (fn s => s = "named.conf") Config.Bind.namedConf
		  else
		     ();
		  if !namedChanged orelse !zoneChanged then
		      Slave.shellF ([Config.Bind.reload],
				 fn cl => "Error reloading bind with " ^ cl)
		  else
		      ()))

val () = Domain.registerResetLocal (fn () =>
				       ignore (OS.Process.system (Config.rm ^ " -rf /var/domtool/zones/*")))

val () = Domain.registerDescriber (Domain.considerAll
				   [Domain.Filename {filename = "named.conf",
						     heading = "named.conf addition:",
						     showEmpty = false},
				    Domain.Filename {filename = "dns",
						     heading = "DNS zonefile contents:",
						     showEmpty = false}])

fun validHost_ s =
    size s > 0 andalso size s < 20
    andalso CharVector.all (fn ch => Domain.isIdent ch orelse ch = #"-" orelse ch = #"_") s

fun validSRVDomain s =
    size s > 0 andalso size s < 100
    andalso List.all validHost_ (String.fields (fn ch => ch = #".") s)

val _ = Env.type_one "srv_domain"
	Env.string
	validSRVDomain

end
Commit	Line	Data
	1	(* HCoop Domtool (http://hcoop.sourceforge.net/)
	2	* Copyright (c) 2006, Adam Chlipala
	3	*
	4	* This program is free software; you can redistribute it and/or
	5	* modify it under the terms of the GNU General Public License
	6	* as published by the Free Software Foundation; either version 2
	7	* of the License, or (at your option) any later version.
	8	*
	9	* This program is distributed in the hope that it will be useful,
	10	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	11	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	12	* GNU General Public License for more details.
	13	*
	14	* You should have received a copy of the GNU General Public License
	15	* along with this program; if not, write to the Free Software
	16	* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
	17	*)
	18
	19	(* BIND DNS *)
	20
	21	structure Bind :> BIND = struct
	22
	23	open Ast
	24
	25	val namedChanged = ref false
	26	val zoneChanged = ref false
	27
	28	val didDomain = ref ""
	29
	30	val () = Slave.registerPreHandler (fn () => (namedChanged := false;
	31	zoneChanged := false;
	32	didDomain := ""))
	33
	34	val dns : Domain.files option ref = ref NONE
	35
	36	val _ = Domain.registerBefore
	37	(fn _ => dns := Option.map (fn node => Domain.domainsFile {node = node,
	38	name = "dns"})
	39	(Domain.dnsMaster ()))
	40
	41	val _ = Domain.registerAfter
	42	(fn _ => (Option.app (fn files => #close files ()) (!dns);
	43	dns := NONE))
	44
	45	val dl = ErrorMsg.dummyLoc
	46
	47	datatype dns_record =
	48	A of string * string
	49	\| CNAME of string * string
	50	\| MX of int * string
	51	\| NS of string
	52	\| DefaultA of string
	53	\| AAAA of string * string
	54	\| DefaultAAAA of string
	55	\| TXT of string * string
	56	\| DefaultTXT of string
	57	\| AFSDB of string
	58	\| SRV of string * int * int * int * string
	59
	60	val record = fn (EApp ((EApp ((EVar "dnsA", _), e1), _), e2), _) =>
	61	(case (Env.string e1, Domain.ip e2) of
	62	(SOME v1, SOME v2) => SOME (A (v1, v2))
	63	\| _ => NONE)
	64	\| (EApp ((EApp ((EVar "dnsCNAME", _), e1), _), e2), _) =>
	65	(case (Env.string e1, Env.string e2) of
	66	(SOME v1, SOME v2) => SOME (CNAME (v1, v2))
	67	\| _ => NONE)
	68	\| (EApp ((EApp ((EVar "dnsMX", _), e1), _), e2), _) =>
	69	(case (Env.int e1, Env.string e2) of
	70	(SOME v1, SOME v2) => SOME (MX (v1, v2))
	71	\| _ => NONE)
	72	\| (EApp ((EVar "dnsNS", _), e), _) =>
	73	Option.map NS (Env.string e)
	74	\| (EApp ((EVar "dnsDefaultA", _), e), _) =>
	75	Option.map DefaultA (Domain.ip e)
	76	\| (EApp ((EApp ((EVar "dnsAAAA", _), e1), _), e2), _) =>
	77	(case (Env.string e1, Env.string e2) of
	78	(SOME v1, SOME v2) => SOME (AAAA (v1, v2))
	79	\| _ => NONE)
	80	\| (EApp ((EVar "dnsDefaultAAAA", _), e), _) =>
	81	Option.map DefaultAAAA (Env.string e)
	82	\| (EApp ((EApp ((EVar "dnsTXT", _), e1), _), e2), _) =>
	83	(case (Env.string e1, Env.string e2) of
	84	(SOME v1, SOME v2) => SOME (TXT (v1, v2))
	85	\| _ => NONE)
	86	\| (EApp ((EVar "dnsDefaultTXT", _), e), _) =>
	87	Option.map DefaultTXT (Env.string e)
	88	\| (EApp ((EVar "dnsAFSDB", _), e), _) =>
	89	Option.map AFSDB (Env.string e)
	90	\| (EApp ((EApp ((EApp ((EApp ((EApp ((EVar "dnsSRV", _), e1), _), e2), _), e3), _), e4), _), e5), _) =>
	91	(case (Env.string e1, Env.int e2, Env.int e3, Env.int e4, Env.string e5) of
	92	(SOME v1, SOME v2, SOME v3, SOME v4, SOME v5) => SOME (SRV (v1, v2, v3, v4, v5))
	93	\| _ => NONE)
	94	\| _ => NONE
	95
	96	fun writeRecord (evs, r) =
	97	case !dns of
	98	NONE => print ("Warning: DNS directive for " ^ Domain.currentDomain ()
	99	^ " ignored because no master DNS server is configured for this domain\n")
	100	\| SOME files =>
	101	let
	102	fun write s = #write files s
	103	fun writeDom () = #writeDom files ()
	104	val ttl = Env.env Env.int (evs, "TTL")
	105	in
	106	case r of
	107	A (from, to) => (write from;
	108	write ".";
	109	writeDom ();
	110	write ".\t";
	111	write (Int.toString ttl);
	112	write "\tIN\tA\t";
	113	write to;
	114	write "\n")
	115	\| DefaultA to => (writeDom ();
	116	write ".\t";
	117	write (Int.toString ttl);
	118	write "\tIN\tA\t";
	119	write to;
	120	write "\n")
	121	\| CNAME (from, to) => (write from;
	122	write ".";
	123	writeDom ();
	124	write ".\t";
	125	write (Int.toString ttl);
	126	write "\tIN\tCNAME\t";
	127	write to;
	128	write ".\n")
	129	\| MX (num, host) => (writeDom ();
	130	write ".\t";
	131	write (Int.toString ttl);
	132	write "\tIN\tMX\t";
	133	write (Int.toString num);
	134	write "\t";
	135	write host;
	136	write ".\n")
	137	\| NS host => (writeDom ();
	138	write ".\t";
	139	write (Int.toString ttl);
	140	write "\tIN\tNS\t";
	141	write host;
	142	write ".\n")
	143	\| AAAA (from, to) => (write from;
	144	write ".";
	145	writeDom ();
	146	write ".\t";
	147	write (Int.toString ttl);
	148	write "\tIN\tAAAA\t";
	149	write to;
	150	write "\n")
	151	\| DefaultAAAA to => (writeDom ();
	152	write ".\t";
	153	write (Int.toString ttl);
	154	write "\tIN\tAAAA\t";
	155	write to;
	156	write "\n")
	157	\| TXT (from, to) => (write from;
	158	write ".";
	159	writeDom ();
	160	write ".\t";
	161	write (Int.toString ttl);
	162	write "\tIN\tTXT\t\"";
	163	write (String.translate (fn #"\"" => "\\\"" \| ch => str ch) to);
	164	write "\"\n")
	165	\| DefaultTXT to => (writeDom ();
	166	write ".\t";
	167	write (Int.toString ttl);
	168	write "\tIN\tTXT\t\"";
	169	write (String.translate (fn #"\"" => "\\\"" \| ch => str ch) to);
	170	write "\"\n")
	171	\| AFSDB host => (writeDom ();
	172	write ".\t";
	173	write (Int.toString ttl);
	174	write "\tIN\tAFSDB\t";
	175	write "1";
	176	write "\t";
	177	write host;
	178	write ".\n")
	179	\| SRV (from, priority, weight, port, to) => (write from;
	180	write ".";
	181	writeDom ();
	182	write ".\t";
	183	write (Int.toString ttl);
	184	write "\tIN\tSRV\t";
	185	write (Int.toString priority);
	186	write "\t";
	187	write (Int.toString weight);
	188	write "\t";
	189	write (Int.toString port);
	190	write "\t";
	191	write to;
	192	write ".\n")
	193	end
	194
	195	val () = Env.actionV_one "dns"
	196	("record", record)
	197	writeRecord
	198
	199	fun readLine inf =
	200	case TextIO.inputLine inf of
	201	NONE => raise Fail "Expected a line for BIND"
	202	\| SOME s => String.substring (s, 0, size s - 1)
	203
	204	fun readILine inf = valOf (Int.fromString (readLine inf))
	205
	206	val monthToInt = fn Date.Jan => 1
	207	\| Date.Feb => 2
	208	\| Date.Mar => 3
	209	\| Date.Apr => 4
	210	\| Date.May => 5
	211	\| Date.Jun => 6
	212	\| Date.Jul => 7
	213	\| Date.Aug => 8
	214	\| Date.Sep => 9
	215	\| Date.Oct => 10
	216	\| Date.Nov => 11
	217	\| Date.Dec => 12
	218
	219	fun padBy ch amt s =
	220	if size s < amt then
	221	CharVector.tabulate (amt - size s, fn _ => ch) ^ s
	222	else
	223	s
	224
	225	fun dateString () =
	226	let
	227	val date = Date.fromTimeUniv (Time.now ())
	228	in
	229	padBy #"0" 4 (Int.toString (Date.year date))
	230	^ padBy #"0" 2 (Int.toString (monthToInt (Date.month date)))
	231	^ padBy #"0" 2 (Int.toString (Date.day date))
	232	end
	233
	234	val () = Slave.registerFileHandler (fn fs =>
	235	let
	236	val {dir, file} = OS.Path.splitDirFile (#file fs)
	237
	238	fun dnsChanged () =
	239	if #domain fs = !didDomain then
	240	()
	241	else if Slave.isDelete (#action fs) then
	242	let
	243	val fname = OS.Path.joinBaseExt {base = #domain fs,
	244	ext = SOME "zone"}
	245	val fname = OS.Path.joinDirFile {dir = Config.Bind.zonePath,
	246	file = fname}
	247	in
	248	Slave.shellF ([Config.rm, " -f ", fname],
	249	fn cl => "Error deleting file: " ^ cl)
	250	end
	251	else
	252	let
	253	val inf = TextIO.openIn (OS.Path.joinDirFile {dir = #dir fs,
	254	file = "soa"})
	255	val kind = readLine inf
	256	val ttl = readILine inf
	257	val ns = readLine inf
	258	val serial = case readLine inf of
	259	"" => NONE
	260	\| s => Int.fromString s
	261	val rf = readILine inf
	262	val ret = readILine inf
	263	val exp = readILine inf
	264	val min = readILine inf
	265	val () = TextIO.closeIn inf
	266
	267	val serialPath = OS.Path.joinDirFile {dir = Config.serialDir,
	268	file = #domain fs}
	269
	270	val oldSerial = let
	271	val inf = TextIO.openIn serialPath
	272	in
	273	SOME (readLine inf)
	274	before TextIO.closeIn inf
	275	end handle IO.Io {name, ...} => NONE
	276
	277	val newSerial =
	278	case serial of
	279	SOME n => Int.toString n
	280	\| NONE =>
	281	let
	282	val prefix = dateString ()
	283	in
	284	prefix
	285	^ (case oldSerial of
	286	NONE => "00"
	287	\| SOME old =>
	288	if size old >= 8 andalso
	289	String.substring (old, 0, 8) = prefix then
	290	case Int.fromString (String.extract (old, 8, NONE)) of
	291	NONE => "00"
	292	\| SOME old => padBy #"0" 2 (Int.toString (old+1))
	293	else
	294	"00")
	295	end
	296
	297	val outf = TextIO.openOut serialPath
	298	val _ = TextIO.output (outf, newSerial)
	299	val _ = TextIO.closeOut outf
	300
	301	val dns = OS.Path.joinDirFile {dir = #dir fs,
	302	file = "dns"}
	303
	304	val fname = OS.Path.joinBaseExt {base = #domain fs,
	305	ext = SOME "zone"}
	306	val fname = OS.Path.joinDirFile {dir = Config.Bind.zonePath,
	307	file = fname}
	308
	309	val outf = TextIO.openOut fname
	310	in
	311	zoneChanged := true;
	312	TextIO.output (outf, "$TTL ");
	313	TextIO.output (outf, Int.toString ttl);
	314	TextIO.output (outf, "\n\n@\tIN\tSOA\t");
	315	TextIO.output (outf, ns);
	316	TextIO.output (outf, ".\thostmaster.");
	317	TextIO.output (outf, #domain fs);
	318	TextIO.output (outf, ". ( ");
	319	TextIO.output (outf, newSerial);
	320	TextIO.output (outf, " ");
	321	TextIO.output (outf, Int.toString rf);
	322	TextIO.output (outf, " ");
	323	TextIO.output (outf, Int.toString ret);
	324	TextIO.output (outf, " ");
	325	TextIO.output (outf, Int.toString exp);
	326	TextIO.output (outf, " ");
	327	TextIO.output (outf, Int.toString min);
	328	TextIO.output (outf, " )\n\n");
	329	TextIO.closeOut outf;
	330	if Posix.FileSys.access (dns, []) then
	331	Slave.shellF ([Config.cat, " ", dns, " >>", fname],
	332	fn cl => "Error concatenating file: " ^ cl)
	333	else
	334	();
	335	didDomain := #domain fs
	336	end
	337	in
	338	case file of
	339	"soa" => dnsChanged ()
	340	\| "dns" => dnsChanged ()
	341	\| "named.conf" => namedChanged := true
	342	\| _ => ()
	343	end)
	344
	345	val () = Slave.registerPostHandler
	346	(fn () =>
	347	(if !namedChanged then
	348	Slave.concatTo (fn s => s = "named.conf") Config.Bind.namedConf
	349	else
	350	();
	351	if !namedChanged orelse !zoneChanged then
	352	Slave.shellF ([Config.Bind.reload],
	353	fn cl => "Error reloading bind with " ^ cl)
	354	else
	355	()))
	356
	357	val () = Domain.registerResetLocal (fn () =>
	358	ignore (OS.Process.system (Config.rm ^ " -rf /var/domtool/zones/*")))
	359
	360	val () = Domain.registerDescriber (Domain.considerAll
	361	[Domain.Filename {filename = "named.conf",
	362	heading = "named.conf addition:",
	363	showEmpty = false},
	364	Domain.Filename {filename = "dns",
	365	heading = "DNS zonefile contents:",
	366	showEmpty = false}])
	367
	368	fun validHost_ s =
	369	size s > 0 andalso size s < 20
	370	andalso CharVector.all (fn ch => Domain.isIdent ch orelse ch = #"-" orelse ch = #"_") s
	371
	372	fun validSRVDomain s =
	373	size s > 0 andalso size s < 100
	374	andalso List.all validHost_ (String.fields (fn ch => ch = #".") s)
	375
	376	val _ = Env.type_one "srv_domain"
	377	Env.string
	378	validSRVDomain
	379
	380	end