[hcoop/domtool2.git] / 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 host =
	 Literal of string
       | Wildcard
       | Default

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

fun hostS (Literal s) = s ^ "."
  | hostS Wildcard = "*."
  | hostS Default = ""

val host = fn (EApp ((EVar "literal", _), e), _) =>
	      Option.map Literal (Env.string e)
	    | (EVar "wildcard", _) =>
	      SOME Wildcard
	    | (EVar "default", _) =>
	      SOME Default
	    | _ => NONE

val record = fn (EApp ((EApp ((EVar "dnsA", _), e1), _), e2), _) =>
		(case (host e1, Domain.ip e2) of
		     (SOME v1, SOME v2) => SOME (A (v1, v2))
		   | _ => NONE)
	      | (EApp ((EApp ((EVar "dnsCNAME", _), e1), _), e2), _) =>
		(case (host 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 ((EApp ((EVar "dnsAAAA", _), e1), _), e2), _) =>
		(case (host e1, Env.string e2) of
		     (SOME v1, SOME v2) => SOME (AAAA (v1, v2))
		   | _ => NONE)
	      | (EApp ((EApp ((EVar "dnsTXT", _), e1), _), e2), _) =>
		(case (host e1, Env.string e2) of
		     (SOME v1, SOME v2) => SOME (TXT (v1, v2))
		   | _ => NONE)
	      | (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 (hostS from);
				 writeDom ();
				 write ".\t";
				 write (Int.toString ttl);
				 write "\tIN\tA\t";
				 write to;
				 write "\n")
	      | CNAME (from, to) => (write (hostS from);
				     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 (hostS from);
				    writeDom ();
				    write ".\t";
				    write (Int.toString ttl);
				    write "\tIN\tAAAA\t";
				    write to;
				    write "\n")
	      | TXT (from, to) => (write (hostS from);
				   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
6ae327f8 AC	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
fa3b6b87	34	val dns : Domain.files option ref = ref NONE
6ae327f8 AC	35
6ae327f8 AC	36	val _ = Domain.registerBefore
fa3b6b87 AC	37	(fn _ => dns := Option.map (fn node => Domain.domainsFile {node = node,
fa3b6b87 AC	38	name = "dns"})
e0b0abd2	39	(Domain.dnsMaster ()))
6ae327f8 AC	40
6ae327f8 AC	41	val _ = Domain.registerAfter
fa3b6b87	42	(fn _ => (Option.app (fn files => #close files ()) (!dns);
325285ab	43	dns := NONE))
6ae327f8 AC	44
	45	val dl = ErrorMsg.dummyLoc
	46
cfedb922 AC	47	datatype host =
	48	Literal of string
	49	\| Wildcard
	50	\| Default
	51
6ae327f8	52	datatype dns_record =
cfedb922 AC	53	A of host * string
cfedb922 AC	54	\| CNAME of host * string
6ae327f8 AC	55	\| MX of int * string
6ae327f8 AC	56	\| NS of string
cfedb922 AC	57	\| AAAA of host * string
cfedb922 AC	58	\| TXT of host * string
c219fe55 AC	59	\| AFSDB of string
c219fe55 AC	60	\| SRV of string * int * int * int * string
6ae327f8	61
cfedb922 AC	62	fun hostS (Literal s) = s ^ "."
	63	\| hostS Wildcard = "*."
	64	\| hostS Default = ""
	65
	66	val host = fn (EApp ((EVar "literal", _), e), _) =>
	67	Option.map Literal (Env.string e)
	68	\| (EVar "wildcard", _) =>
	69	SOME Wildcard
	70	\| (EVar "default", _) =>
	71	SOME Default
	72	\| _ => NONE
	73
6ae327f8	74	val record = fn (EApp ((EApp ((EVar "dnsA", _), e1), _), e2), _) =>
cfedb922	75	(case (host e1, Domain.ip e2) of
6ae327f8 AC	76	(SOME v1, SOME v2) => SOME (A (v1, v2))
	77	\| _ => NONE)
	78	\| (EApp ((EApp ((EVar "dnsCNAME", _), e1), _), e2), _) =>
cfedb922	79	(case (host e1, Env.string e2) of
6ae327f8 AC	80	(SOME v1, SOME v2) => SOME (CNAME (v1, v2))
	81	\| _ => NONE)
	82	\| (EApp ((EApp ((EVar "dnsMX", _), e1), _), e2), _) =>
	83	(case (Env.int e1, Env.string e2) of
	84	(SOME v1, SOME v2) => SOME (MX (v1, v2))
	85	\| _ => NONE)
	86	\| (EApp ((EVar "dnsNS", _), e), _) =>
	87	Option.map NS (Env.string e)
090692f7	88	\| (EApp ((EApp ((EVar "dnsAAAA", _), e1), _), e2), _) =>
cfedb922	89	(case (host e1, Env.string e2) of
090692f7 AC	90	(SOME v1, SOME v2) => SOME (AAAA (v1, v2))
090692f7 AC	91	\| _ => NONE)
f2cf641d	92	\| (EApp ((EApp ((EVar "dnsTXT", _), e1), _), e2), _) =>
cfedb922	93	(case (host e1, Env.string e2) of
f2cf641d AC	94	(SOME v1, SOME v2) => SOME (TXT (v1, v2))
f2cf641d AC	95	\| _ => NONE)
c219fe55 AC	96	\| (EApp ((EVar "dnsAFSDB", _), e), _) =>
	97	Option.map AFSDB (Env.string e)
	98	\| (EApp ((EApp ((EApp ((EApp ((EApp ((EVar "dnsSRV", _), e1), _), e2), _), e3), _), e4), _), e5), _) =>
	99	(case (Env.string e1, Env.int e2, Env.int e3, Env.int e4, Env.string e5) of
	100	(SOME v1, SOME v2, SOME v3, SOME v4, SOME v5) => SOME (SRV (v1, v2, v3, v4, v5))
	101	\| _ => NONE)
6ae327f8 AC	102	\| _ => NONE
	103
	104	fun writeRecord (evs, r) =
e0b0abd2	105	case !dns of
cf283351 AC	106	NONE => print ("Warning: DNS directive for " ^ Domain.currentDomain ()
cf283351 AC	107	^ " ignored because no master DNS server is configured for this domain\n")
fa3b6b87	108	\| SOME files =>
e0b0abd2	109	let
fa3b6b87 AC	110	fun write s = #write files s
fa3b6b87 AC	111	fun writeDom () = #writeDom files ()
e0b0abd2 AC	112	val ttl = Env.env Env.int (evs, "TTL")
	113	in
	114	case r of
cfedb922	115	A (from, to) => (write (hostS from);
fa3b6b87	116	writeDom ();
6ae327f8 AC	117	write ".\t";
6ae327f8 AC	118	write (Int.toString ttl);
e0b0abd2	119	write "\tIN\tA\t";
6ae327f8	120	write to;
e0b0abd2	121	write "\n")
cfedb922	122	\| CNAME (from, to) => (write (hostS from);
fa3b6b87	123	writeDom ();
e0b0abd2 AC	124	write ".\t";
	125	write (Int.toString ttl);
	126	write "\tIN\tCNAME\t";
	127	write to;
	128	write ".\n")
ec554091 AC	129	\| MX (num, host) => (writeDom ();
ec554091 AC	130	write ".\t";
e0b0abd2 AC	131	write (Int.toString ttl);
	132	write "\tIN\tMX\t";
	133	write (Int.toString num);
	134	write "\t";
	135	write host;
	136	write ".\n")
ec554091 AC	137	\| NS host => (writeDom ();
ec554091 AC	138	write ".\t";
e0b0abd2 AC	139	write (Int.toString ttl);
	140	write "\tIN\tNS\t";
	141	write host;
	142	write ".\n")
cfedb922	143	\| AAAA (from, to) => (write (hostS from);
090692f7 AC	144	writeDom ();
	145	write ".\t";
	146	write (Int.toString ttl);
	147	write "\tIN\tAAAA\t";
	148	write to;
	149	write "\n")
cfedb922	150	\| TXT (from, to) => (write (hostS from);
f2cf641d AC	151	writeDom ();
	152	write ".\t";
	153	write (Int.toString ttl);
	154	write "\tIN\tTXT\t\"";
	155	write (String.translate (fn #"\"" => "\\\"" \| ch => str ch) to);
	156	write "\"\n")
c219fe55 AC	157	\| AFSDB host => (writeDom ();
	158	write ".\t";
	159	write (Int.toString ttl);
	160	write "\tIN\tAFSDB\t";
	161	write "1";
	162	write "\t";
	163	write host;
	164	write ".\n")
	165	\| SRV (from, priority, weight, port, to) => (write from;
	166	write ".";
	167	writeDom ();
	168	write ".\t";
	169	write (Int.toString ttl);
	170	write "\tIN\tSRV\t";
	171	write (Int.toString priority);
	172	write "\t";
	173	write (Int.toString weight);
	174	write "\t";
	175	write (Int.toString port);
	176	write "\t";
	177	write to;
	178	write ".\n")
e0b0abd2	179	end
6ae327f8 AC	180
	181	val () = Env.actionV_one "dns"
	182	("record", record)
	183	writeRecord
	184
	185	fun readLine inf =
	186	case TextIO.inputLine inf of
	187	NONE => raise Fail "Expected a line for BIND"
	188	\| SOME s => String.substring (s, 0, size s - 1)
	189
	190	fun readILine inf = valOf (Int.fromString (readLine inf))
	191
3f07a40e AC	192	val monthToInt = fn Date.Jan => 1
	193	\| Date.Feb => 2
	194	\| Date.Mar => 3
	195	\| Date.Apr => 4
	196	\| Date.May => 5
	197	\| Date.Jun => 6
	198	\| Date.Jul => 7
	199	\| Date.Aug => 8
	200	\| Date.Sep => 9
	201	\| Date.Oct => 10
	202	\| Date.Nov => 11
	203	\| Date.Dec => 12
	204
	205	fun padBy ch amt s =
	206	if size s < amt then
82a0d609	207	CharVector.tabulate (amt - size s, fn _ => ch) ^ s
3f07a40e AC	208	else
	209	s
	210
	211	fun dateString () =
	212	let
	213	val date = Date.fromTimeUniv (Time.now ())
	214	in
	215	padBy #"0" 4 (Int.toString (Date.year date))
	216	^ padBy #"0" 2 (Int.toString (monthToInt (Date.month date)))
	217	^ padBy #"0" 2 (Int.toString (Date.day date))
	218	end
	219
6ae327f8 AC	220	val () = Slave.registerFileHandler (fn fs =>
	221	let
	222	val {dir, file} = OS.Path.splitDirFile (#file fs)
	223
	224	fun dnsChanged () =
	225	if #domain fs = !didDomain then
	226	()
1638d5a2	227	else if Slave.isDelete (#action fs) then
6ae327f8 AC	228	let
	229	val fname = OS.Path.joinBaseExt {base = #domain fs,
	230	ext = SOME "zone"}
	231	val fname = OS.Path.joinDirFile {dir = Config.Bind.zonePath,
	232	file = fname}
	233	in
325285ab AC	234	Slave.shellF ([Config.rm, " -f ", fname],
325285ab AC	235	fn cl => "Error deleting file: " ^ cl)
6ae327f8 AC	236	end
	237	else
	238	let
	239	val inf = TextIO.openIn (OS.Path.joinDirFile {dir = #dir fs,
	240	file = "soa"})
	241	val kind = readLine inf
	242	val ttl = readILine inf
	243	val ns = readLine inf
	244	val serial = case readLine inf of
	245	"" => NONE
	246	\| s => Int.fromString s
	247	val rf = readILine inf
	248	val ret = readILine inf
	249	val exp = readILine inf
	250	val min = readILine inf
	251	val () = TextIO.closeIn inf
	252
82a0d609 AC	253	val serialPath = OS.Path.joinDirFile {dir = Config.serialDir,
	254	file = #domain fs}
	255
3f07a40e	256	val oldSerial = let
82a0d609	257	val inf = TextIO.openIn serialPath
3f07a40e AC	258	in
	259	SOME (readLine inf)
	260	before TextIO.closeIn inf
82a0d609	261	end handle IO.Io {name, ...} => NONE
3f07a40e AC	262
	263	val newSerial =
	264	case serial of
	265	SOME n => Int.toString n
	266	\| NONE =>
	267	let
	268	val prefix = dateString ()
	269	in
	270	prefix
	271	^ (case oldSerial of
	272	NONE => "00"
	273	\| SOME old =>
	274	if size old >= 8 andalso
	275	String.substring (old, 0, 8) = prefix then
	276	case Int.fromString (String.extract (old, 8, NONE)) of
	277	NONE => "00"
	278	\| SOME old => padBy #"0" 2 (Int.toString (old+1))
	279	else
	280	"00")
	281	end
	282
82a0d609	283	val outf = TextIO.openOut serialPath
3f07a40e AC	284	val _ = TextIO.output (outf, newSerial)
	285	val _ = TextIO.closeOut outf
	286
6ae327f8 AC	287	val dns = OS.Path.joinDirFile {dir = #dir fs,
	288	file = "dns"}
	289
	290	val fname = OS.Path.joinBaseExt {base = #domain fs,
	291	ext = SOME "zone"}
	292	val fname = OS.Path.joinDirFile {dir = Config.Bind.zonePath,
	293	file = fname}
	294
	295	val outf = TextIO.openOut fname
	296	in
	297	zoneChanged := true;
	298	TextIO.output (outf, "$TTL ");
	299	TextIO.output (outf, Int.toString ttl);
	300	TextIO.output (outf, "\n\n@\tIN\tSOA\t");
	301	TextIO.output (outf, ns);
	302	TextIO.output (outf, ".\thostmaster.");
	303	TextIO.output (outf, #domain fs);
722e651b	304	TextIO.output (outf, ". ( ");
3f07a40e	305	TextIO.output (outf, newSerial);
6ae327f8 AC	306	TextIO.output (outf, " ");
	307	TextIO.output (outf, Int.toString rf);
	308	TextIO.output (outf, " ");
	309	TextIO.output (outf, Int.toString ret);
	310	TextIO.output (outf, " ");
	311	TextIO.output (outf, Int.toString exp);
	312	TextIO.output (outf, " ");
	313	TextIO.output (outf, Int.toString min);
	314	TextIO.output (outf, " )\n\n");
	315	TextIO.closeOut outf;
325285ab AC	316	if Posix.FileSys.access (dns, []) then
	317	Slave.shellF ([Config.cat, " ", dns, " >>", fname],
	318	fn cl => "Error concatenating file: " ^ cl)
	319	else
	320	();
6ae327f8 AC	321	didDomain := #domain fs
	322	end
	323	in
	324	case file of
	325	"soa" => dnsChanged ()
	326	\| "dns" => dnsChanged ()
	327	\| "named.conf" => namedChanged := true
	328	\| _ => ()
	329	end)
	330
	331	val () = Slave.registerPostHandler
	332	(fn () =>
	333	(if !namedChanged then
	334	Slave.concatTo (fn s => s = "named.conf") Config.Bind.namedConf
	335	else
	336	();
	337	if !namedChanged orelse !zoneChanged then
	338	Slave.shellF ([Config.Bind.reload],
	339	fn cl => "Error reloading bind with " ^ cl)
	340	else
	341	()))
71420f8b AC	342
	343	val () = Domain.registerResetLocal (fn () =>
	344	ignore (OS.Process.system (Config.rm ^ " -rf /var/domtool/zones/*")))
	345
41c58daf AC	346	val () = Domain.registerDescriber (Domain.considerAll
41c58daf AC	347	[Domain.Filename {filename = "named.conf",
d936cf4d	348	heading = "named.conf addition:",
41c58daf AC	349	showEmpty = false},
41c58daf AC	350	Domain.Filename {filename = "dns",
d936cf4d	351	heading = "DNS zonefile contents:",
41c58daf AC	352	showEmpty = false}])
41c58daf AC	353
c219fe55 AC	354	fun validHost_ s =
	355	size s > 0 andalso size s < 20
	356	andalso CharVector.all (fn ch => Domain.isIdent ch orelse ch = #"-" orelse ch = #"_") s
	357
	358	fun validSRVDomain s =
	359	size s > 0 andalso size s < 100
	360	andalso List.all validHost_ (String.fields (fn ch => ch = #".") s)
	361
	362	val _ = Env.type_one "srv_domain"
	363	Env.string
	364	validSRVDomain
	365
6ae327f8	366	end