[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
       | AAAA of string * string
       | DefaultAAAA 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 (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)
	      | _ => 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")
	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
090692f7 AC	53	\| AAAA of string * string
090692f7 AC	54	\| DefaultAAAA of string
6ae327f8 AC	55
6ae327f8 AC	56	val record = fn (EApp ((EApp ((EVar "dnsA", _), e1), _), e2), _) =>
97665758	57	(case (Env.string e1, Domain.ip e2) of
6ae327f8 AC	58	(SOME v1, SOME v2) => SOME (A (v1, v2))
	59	\| _ => NONE)
	60	\| (EApp ((EApp ((EVar "dnsCNAME", _), e1), _), e2), _) =>
	61	(case (Env.string e1, Env.string e2) of
	62	(SOME v1, SOME v2) => SOME (CNAME (v1, v2))
	63	\| _ => NONE)
	64	\| (EApp ((EApp ((EVar "dnsMX", _), e1), _), e2), _) =>
	65	(case (Env.int e1, Env.string e2) of
	66	(SOME v1, SOME v2) => SOME (MX (v1, v2))
	67	\| _ => NONE)
	68	\| (EApp ((EVar "dnsNS", _), e), _) =>
	69	Option.map NS (Env.string e)
6eeb3bf9	70	\| (EApp ((EVar "dnsDefaultA", _), e), _) =>
090692f7 AC	71	Option.map DefaultA (Domain.ip e)
	72	\| (EApp ((EApp ((EVar "dnsAAAA", _), e1), _), e2), _) =>
	73	(case (Env.string e1, Env.string e2) of
	74	(SOME v1, SOME v2) => SOME (AAAA (v1, v2))
	75	\| _ => NONE)
	76	\| (EApp ((EVar "dnsDefaultAAAA", _), e), _) =>
	77	Option.map DefaultAAAA (Env.string e)
6ae327f8 AC	78	\| _ => NONE
	79
	80	fun writeRecord (evs, r) =
e0b0abd2	81	case !dns of
cf283351 AC	82	NONE => print ("Warning: DNS directive for " ^ Domain.currentDomain ()
cf283351 AC	83	^ " ignored because no master DNS server is configured for this domain\n")
fa3b6b87	84	\| SOME files =>
e0b0abd2	85	let
fa3b6b87 AC	86	fun write s = #write files s
fa3b6b87 AC	87	fun writeDom () = #writeDom files ()
e0b0abd2 AC	88	val ttl = Env.env Env.int (evs, "TTL")
	89	in
	90	case r of
	91	A (from, to) => (write from;
6ae327f8	92	write ".";
fa3b6b87	93	writeDom ();
6ae327f8 AC	94	write ".\t";
6ae327f8 AC	95	write (Int.toString ttl);
e0b0abd2	96	write "\tIN\tA\t";
6ae327f8	97	write to;
e0b0abd2	98	write "\n")
6eeb3bf9 AC	99	\| DefaultA to => (writeDom ();
	100	write ".\t";
	101	write (Int.toString ttl);
	102	write "\tIN\tA\t";
	103	write to;
	104	write "\n")
e0b0abd2 AC	105	\| CNAME (from, to) => (write from;
e0b0abd2 AC	106	write ".";
fa3b6b87	107	writeDom ();
e0b0abd2 AC	108	write ".\t";
	109	write (Int.toString ttl);
	110	write "\tIN\tCNAME\t";
	111	write to;
	112	write ".\n")
ec554091 AC	113	\| MX (num, host) => (writeDom ();
ec554091 AC	114	write ".\t";
e0b0abd2 AC	115	write (Int.toString ttl);
	116	write "\tIN\tMX\t";
	117	write (Int.toString num);
	118	write "\t";
	119	write host;
	120	write ".\n")
ec554091 AC	121	\| NS host => (writeDom ();
ec554091 AC	122	write ".\t";
e0b0abd2 AC	123	write (Int.toString ttl);
	124	write "\tIN\tNS\t";
	125	write host;
	126	write ".\n")
090692f7 AC	127	\| AAAA (from, to) => (write from;
	128	write ".";
	129	writeDom ();
	130	write ".\t";
	131	write (Int.toString ttl);
	132	write "\tIN\tAAAA\t";
	133	write to;
	134	write "\n")
	135	\| DefaultAAAA to => (writeDom ();
	136	write ".\t";
	137	write (Int.toString ttl);
	138	write "\tIN\tAAAA\t";
	139	write to;
	140	write "\n")
e0b0abd2	141	end
6ae327f8 AC	142
	143	val () = Env.actionV_one "dns"
	144	("record", record)
	145	writeRecord
	146
	147	fun readLine inf =
	148	case TextIO.inputLine inf of
	149	NONE => raise Fail "Expected a line for BIND"
	150	\| SOME s => String.substring (s, 0, size s - 1)
	151
	152	fun readILine inf = valOf (Int.fromString (readLine inf))
	153
3f07a40e AC	154	val monthToInt = fn Date.Jan => 1
	155	\| Date.Feb => 2
	156	\| Date.Mar => 3
	157	\| Date.Apr => 4
	158	\| Date.May => 5
	159	\| Date.Jun => 6
	160	\| Date.Jul => 7
	161	\| Date.Aug => 8
	162	\| Date.Sep => 9
	163	\| Date.Oct => 10
	164	\| Date.Nov => 11
	165	\| Date.Dec => 12
	166
	167	fun padBy ch amt s =
	168	if size s < amt then
82a0d609	169	CharVector.tabulate (amt - size s, fn _ => ch) ^ s
3f07a40e AC	170	else
	171	s
	172
	173	fun dateString () =
	174	let
	175	val date = Date.fromTimeUniv (Time.now ())
	176	in
	177	padBy #"0" 4 (Int.toString (Date.year date))
	178	^ padBy #"0" 2 (Int.toString (monthToInt (Date.month date)))
	179	^ padBy #"0" 2 (Int.toString (Date.day date))
	180	end
	181
6ae327f8 AC	182	val () = Slave.registerFileHandler (fn fs =>
	183	let
	184	val {dir, file} = OS.Path.splitDirFile (#file fs)
	185
	186	fun dnsChanged () =
	187	if #domain fs = !didDomain then
	188	()
1638d5a2	189	else if Slave.isDelete (#action fs) then
6ae327f8 AC	190	let
	191	val fname = OS.Path.joinBaseExt {base = #domain fs,
	192	ext = SOME "zone"}
	193	val fname = OS.Path.joinDirFile {dir = Config.Bind.zonePath,
	194	file = fname}
	195	in
325285ab AC	196	Slave.shellF ([Config.rm, " -f ", fname],
325285ab AC	197	fn cl => "Error deleting file: " ^ cl)
6ae327f8 AC	198	end
	199	else
	200	let
	201	val inf = TextIO.openIn (OS.Path.joinDirFile {dir = #dir fs,
	202	file = "soa"})
	203	val kind = readLine inf
	204	val ttl = readILine inf
	205	val ns = readLine inf
	206	val serial = case readLine inf of
	207	"" => NONE
	208	\| s => Int.fromString s
	209	val rf = readILine inf
	210	val ret = readILine inf
	211	val exp = readILine inf
	212	val min = readILine inf
	213	val () = TextIO.closeIn inf
	214
82a0d609 AC	215	val serialPath = OS.Path.joinDirFile {dir = Config.serialDir,
	216	file = #domain fs}
	217
3f07a40e	218	val oldSerial = let
82a0d609	219	val inf = TextIO.openIn serialPath
3f07a40e AC	220	in
	221	SOME (readLine inf)
	222	before TextIO.closeIn inf
82a0d609	223	end handle IO.Io {name, ...} => NONE
3f07a40e AC	224
	225	val newSerial =
	226	case serial of
	227	SOME n => Int.toString n
	228	\| NONE =>
	229	let
	230	val prefix = dateString ()
	231	in
	232	prefix
	233	^ (case oldSerial of
	234	NONE => "00"
	235	\| SOME old =>
	236	if size old >= 8 andalso
	237	String.substring (old, 0, 8) = prefix then
	238	case Int.fromString (String.extract (old, 8, NONE)) of
	239	NONE => "00"
	240	\| SOME old => padBy #"0" 2 (Int.toString (old+1))
	241	else
	242	"00")
	243	end
	244
82a0d609	245	val outf = TextIO.openOut serialPath
3f07a40e AC	246	val _ = TextIO.output (outf, newSerial)
	247	val _ = TextIO.closeOut outf
	248
6ae327f8 AC	249	val dns = OS.Path.joinDirFile {dir = #dir fs,
	250	file = "dns"}
	251
	252	val fname = OS.Path.joinBaseExt {base = #domain fs,
	253	ext = SOME "zone"}
	254	val fname = OS.Path.joinDirFile {dir = Config.Bind.zonePath,
	255	file = fname}
	256
	257	val outf = TextIO.openOut fname
	258	in
	259	zoneChanged := true;
	260	TextIO.output (outf, "$TTL ");
	261	TextIO.output (outf, Int.toString ttl);
	262	TextIO.output (outf, "\n\n@\tIN\tSOA\t");
	263	TextIO.output (outf, ns);
	264	TextIO.output (outf, ".\thostmaster.");
	265	TextIO.output (outf, #domain fs);
722e651b	266	TextIO.output (outf, ". ( ");
3f07a40e	267	TextIO.output (outf, newSerial);
6ae327f8 AC	268	TextIO.output (outf, " ");
	269	TextIO.output (outf, Int.toString rf);
	270	TextIO.output (outf, " ");
	271	TextIO.output (outf, Int.toString ret);
	272	TextIO.output (outf, " ");
	273	TextIO.output (outf, Int.toString exp);
	274	TextIO.output (outf, " ");
	275	TextIO.output (outf, Int.toString min);
	276	TextIO.output (outf, " )\n\n");
	277	TextIO.closeOut outf;
325285ab AC	278	if Posix.FileSys.access (dns, []) then
	279	Slave.shellF ([Config.cat, " ", dns, " >>", fname],
	280	fn cl => "Error concatenating file: " ^ cl)
	281	else
	282	();
6ae327f8 AC	283	didDomain := #domain fs
	284	end
	285	in
	286	case file of
	287	"soa" => dnsChanged ()
	288	\| "dns" => dnsChanged ()
	289	\| "named.conf" => namedChanged := true
	290	\| _ => ()
	291	end)
	292
	293	val () = Slave.registerPostHandler
	294	(fn () =>
	295	(if !namedChanged then
	296	Slave.concatTo (fn s => s = "named.conf") Config.Bind.namedConf
	297	else
	298	();
	299	if !namedChanged orelse !zoneChanged then
	300	Slave.shellF ([Config.Bind.reload],
	301	fn cl => "Error reloading bind with " ^ cl)
	302	else
	303	()))
71420f8b AC	304
	305	val () = Domain.registerResetLocal (fn () =>
	306	ignore (OS.Process.system (Config.rm ^ " -rf /var/domtool/zones/*")))
	307
41c58daf AC	308	val () = Domain.registerDescriber (Domain.considerAll
41c58daf AC	309	[Domain.Filename {filename = "named.conf",
d936cf4d	310	heading = "named.conf addition:",
41c58daf AC	311	showEmpty = false},
41c58daf AC	312	Domain.Filename {filename = "dns",
d936cf4d	313	heading = "DNS zonefile contents:",
41c58daf AC	314	showEmpty = false}])
41c58daf AC	315
6ae327f8	316	end