[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 dns_record =
	 A of string * string
       | CNAME of string * string
       | MX of int * string
       | NS of string
       | DefaultA of 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 (Env.string e)
	      | _ => 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")
	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}])

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
	47	datatype dns_record =
	48	A of string * string
	49	\| CNAME of string * string
	50	\| MX of int * string
	51	\| NS of string
6eeb3bf9	52	\| DefaultA of string
6ae327f8 AC	53
6ae327f8 AC	54	val record = fn (EApp ((EApp ((EVar "dnsA", _), e1), _), e2), _) =>
97665758	55	(case (Env.string e1, Domain.ip e2) of
6ae327f8 AC	56	(SOME v1, SOME v2) => SOME (A (v1, v2))
	57	\| _ => NONE)
	58	\| (EApp ((EApp ((EVar "dnsCNAME", _), e1), _), e2), _) =>
	59	(case (Env.string e1, Env.string e2) of
	60	(SOME v1, SOME v2) => SOME (CNAME (v1, v2))
	61	\| _ => NONE)
	62	\| (EApp ((EApp ((EVar "dnsMX", _), e1), _), e2), _) =>
	63	(case (Env.int e1, Env.string e2) of
	64	(SOME v1, SOME v2) => SOME (MX (v1, v2))
	65	\| _ => NONE)
	66	\| (EApp ((EVar "dnsNS", _), e), _) =>
	67	Option.map NS (Env.string e)
6eeb3bf9 AC	68	\| (EApp ((EVar "dnsDefaultA", _), e), _) =>
6eeb3bf9 AC	69	Option.map DefaultA (Env.string e)
6ae327f8 AC	70	\| _ => NONE
	71
	72	fun writeRecord (evs, r) =
e0b0abd2	73	case !dns of
cf283351 AC	74	NONE => print ("Warning: DNS directive for " ^ Domain.currentDomain ()
cf283351 AC	75	^ " ignored because no master DNS server is configured for this domain\n")
fa3b6b87	76	\| SOME files =>
e0b0abd2	77	let
fa3b6b87 AC	78	fun write s = #write files s
fa3b6b87 AC	79	fun writeDom () = #writeDom files ()
e0b0abd2 AC	80	val ttl = Env.env Env.int (evs, "TTL")
	81	in
	82	case r of
	83	A (from, to) => (write from;
6ae327f8	84	write ".";
fa3b6b87	85	writeDom ();
6ae327f8 AC	86	write ".\t";
6ae327f8 AC	87	write (Int.toString ttl);
e0b0abd2	88	write "\tIN\tA\t";
6ae327f8	89	write to;
e0b0abd2	90	write "\n")
6eeb3bf9 AC	91	\| DefaultA to => (writeDom ();
	92	write ".\t";
	93	write (Int.toString ttl);
	94	write "\tIN\tA\t";
	95	write to;
	96	write "\n")
e0b0abd2 AC	97	\| CNAME (from, to) => (write from;
e0b0abd2 AC	98	write ".";
fa3b6b87	99	writeDom ();
e0b0abd2 AC	100	write ".\t";
	101	write (Int.toString ttl);
	102	write "\tIN\tCNAME\t";
	103	write to;
	104	write ".\n")
ec554091 AC	105	\| MX (num, host) => (writeDom ();
ec554091 AC	106	write ".\t";
e0b0abd2 AC	107	write (Int.toString ttl);
	108	write "\tIN\tMX\t";
	109	write (Int.toString num);
	110	write "\t";
	111	write host;
	112	write ".\n")
ec554091 AC	113	\| NS host => (writeDom ();
ec554091 AC	114	write ".\t";
e0b0abd2 AC	115	write (Int.toString ttl);
	116	write "\tIN\tNS\t";
	117	write host;
	118	write ".\n")
	119	end
6ae327f8 AC	120
	121	val () = Env.actionV_one "dns"
	122	("record", record)
	123	writeRecord
	124
	125	fun readLine inf =
	126	case TextIO.inputLine inf of
	127	NONE => raise Fail "Expected a line for BIND"
	128	\| SOME s => String.substring (s, 0, size s - 1)
	129
	130	fun readILine inf = valOf (Int.fromString (readLine inf))
	131
3f07a40e AC	132	val monthToInt = fn Date.Jan => 1
	133	\| Date.Feb => 2
	134	\| Date.Mar => 3
	135	\| Date.Apr => 4
	136	\| Date.May => 5
	137	\| Date.Jun => 6
	138	\| Date.Jul => 7
	139	\| Date.Aug => 8
	140	\| Date.Sep => 9
	141	\| Date.Oct => 10
	142	\| Date.Nov => 11
	143	\| Date.Dec => 12
	144
	145	fun padBy ch amt s =
	146	if size s < amt then
82a0d609	147	CharVector.tabulate (amt - size s, fn _ => ch) ^ s
3f07a40e AC	148	else
	149	s
	150
	151	fun dateString () =
	152	let
	153	val date = Date.fromTimeUniv (Time.now ())
	154	in
	155	padBy #"0" 4 (Int.toString (Date.year date))
	156	^ padBy #"0" 2 (Int.toString (monthToInt (Date.month date)))
	157	^ padBy #"0" 2 (Int.toString (Date.day date))
	158	end
	159
6ae327f8 AC	160	val () = Slave.registerFileHandler (fn fs =>
	161	let
	162	val {dir, file} = OS.Path.splitDirFile (#file fs)
	163
	164	fun dnsChanged () =
	165	if #domain fs = !didDomain then
	166	()
1638d5a2	167	else if Slave.isDelete (#action fs) then
6ae327f8 AC	168	let
	169	val fname = OS.Path.joinBaseExt {base = #domain fs,
	170	ext = SOME "zone"}
	171	val fname = OS.Path.joinDirFile {dir = Config.Bind.zonePath,
	172	file = fname}
	173	in
325285ab AC	174	Slave.shellF ([Config.rm, " -f ", fname],
325285ab AC	175	fn cl => "Error deleting file: " ^ cl)
6ae327f8 AC	176	end
	177	else
	178	let
	179	val inf = TextIO.openIn (OS.Path.joinDirFile {dir = #dir fs,
	180	file = "soa"})
	181	val kind = readLine inf
	182	val ttl = readILine inf
	183	val ns = readLine inf
	184	val serial = case readLine inf of
	185	"" => NONE
	186	\| s => Int.fromString s
	187	val rf = readILine inf
	188	val ret = readILine inf
	189	val exp = readILine inf
	190	val min = readILine inf
	191	val () = TextIO.closeIn inf
	192
82a0d609 AC	193	val serialPath = OS.Path.joinDirFile {dir = Config.serialDir,
	194	file = #domain fs}
	195
3f07a40e	196	val oldSerial = let
82a0d609	197	val inf = TextIO.openIn serialPath
3f07a40e AC	198	in
	199	SOME (readLine inf)
	200	before TextIO.closeIn inf
82a0d609	201	end handle IO.Io {name, ...} => NONE
3f07a40e AC	202
	203	val newSerial =
	204	case serial of
	205	SOME n => Int.toString n
	206	\| NONE =>
	207	let
	208	val prefix = dateString ()
	209	in
	210	prefix
	211	^ (case oldSerial of
	212	NONE => "00"
	213	\| SOME old =>
	214	if size old >= 8 andalso
	215	String.substring (old, 0, 8) = prefix then
	216	case Int.fromString (String.extract (old, 8, NONE)) of
	217	NONE => "00"
	218	\| SOME old => padBy #"0" 2 (Int.toString (old+1))
	219	else
	220	"00")
	221	end
	222
82a0d609	223	val outf = TextIO.openOut serialPath
3f07a40e AC	224	val _ = TextIO.output (outf, newSerial)
	225	val _ = TextIO.closeOut outf
	226
6ae327f8 AC	227	val dns = OS.Path.joinDirFile {dir = #dir fs,
	228	file = "dns"}
	229
	230	val fname = OS.Path.joinBaseExt {base = #domain fs,
	231	ext = SOME "zone"}
	232	val fname = OS.Path.joinDirFile {dir = Config.Bind.zonePath,
	233	file = fname}
	234
	235	val outf = TextIO.openOut fname
	236	in
	237	zoneChanged := true;
	238	TextIO.output (outf, "$TTL ");
	239	TextIO.output (outf, Int.toString ttl);
	240	TextIO.output (outf, "\n\n@\tIN\tSOA\t");
	241	TextIO.output (outf, ns);
	242	TextIO.output (outf, ".\thostmaster.");
	243	TextIO.output (outf, #domain fs);
722e651b	244	TextIO.output (outf, ". ( ");
3f07a40e	245	TextIO.output (outf, newSerial);
6ae327f8 AC	246	TextIO.output (outf, " ");
	247	TextIO.output (outf, Int.toString rf);
	248	TextIO.output (outf, " ");
	249	TextIO.output (outf, Int.toString ret);
	250	TextIO.output (outf, " ");
	251	TextIO.output (outf, Int.toString exp);
	252	TextIO.output (outf, " ");
	253	TextIO.output (outf, Int.toString min);
	254	TextIO.output (outf, " )\n\n");
	255	TextIO.closeOut outf;
325285ab AC	256	if Posix.FileSys.access (dns, []) then
	257	Slave.shellF ([Config.cat, " ", dns, " >>", fname],
	258	fn cl => "Error concatenating file: " ^ cl)
	259	else
	260	();
6ae327f8 AC	261	didDomain := #domain fs
	262	end
	263	in
	264	case file of
	265	"soa" => dnsChanged ()
	266	\| "dns" => dnsChanged ()
	267	\| "named.conf" => namedChanged := true
	268	\| _ => ()
	269	end)
	270
	271	val () = Slave.registerPostHandler
	272	(fn () =>
	273	(if !namedChanged then
	274	Slave.concatTo (fn s => s = "named.conf") Config.Bind.namedConf
	275	else
	276	();
	277	if !namedChanged orelse !zoneChanged then
	278	Slave.shellF ([Config.Bind.reload],
	279	fn cl => "Error reloading bind with " ^ cl)
	280	else
	281	()))
71420f8b AC	282
	283	val () = Domain.registerResetLocal (fn () =>
	284	ignore (OS.Process.system (Config.rm ^ " -rf /var/domtool/zones/*")))
	285
41c58daf AC	286	val () = Domain.registerDescriber (Domain.considerAll
41c58daf AC	287	[Domain.Filename {filename = "named.conf",
d936cf4d	288	heading = "named.conf addition:",
41c58daf AC	289	showEmpty = false},
41c58daf AC	290	Domain.Filename {filename = "dns",
d936cf4d	291	heading = "DNS zonefile contents:",
41c58daf AC	292	showEmpty = false}])
41c58daf AC	293
6ae327f8	294	end