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 : TextIO.outstream option ref = ref NONE

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

val _ = Domain.registerAfter
	    (fn _ => (Option.app TextIO.closeOut (!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

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)
	      | _ => NONE

fun writeRecord (evs, r) =
    case !dns of
	NONE => print "Warning: DNS directive ignored because no master DNS server is configured for this domain\n"
      | SOME file =>
	let
	    fun write s = TextIO.output (file, s)
	    val ttl = Env.env Env.int (evs, "TTL")
	in
	    case r of
		A (from, to) => (write from;
				 write ".";
				 write (Domain.currentDomain ());
				 write ".\t";
				 write (Int.toString ttl);
				 write "\tIN\tA\t";
				 write to;
				 write "\n")
	      | CNAME (from, to) => (write from;
				     write ".";
				     write (Domain.currentDomain ());
				     write ".\t";
				     write (Int.toString ttl);
				     write "\tIN\tCNAME\t";
				     write to;
				     write ".\n")
	      | MX (num, host) => (write "\t";
				   write (Int.toString ttl);
				   write "\tIN\tMX\t";
				   write (Int.toString num);
				   write "\t";
				   write host;
				   write ".\n")
	      | NS host => (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 () = Slave.registerFileHandler (fn fs =>
				       let
					   val {dir, file} = OS.Path.splitDirFile (#file fs)

					   fun dnsChanged () =
					       if #domain fs = !didDomain then
						   ()
					       else if #action fs = Slave.Delete 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 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, Int.toString 123456789);
						       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
		      ()))
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 : TextIO.outstream option ref = ref NONE
	35
	36	val _ = Domain.registerBefore
	37	(fn _ => dns := Option.map (fn node => Domain.domainFile {node = node,
	38	name = "dns"})
	39	(Domain.dnsMaster ()))
	40
	41	val _ = Domain.registerAfter
	42	(fn _ => (Option.app TextIO.closeOut (!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
	53	val record = fn (EApp ((EApp ((EVar "dnsA", _), e1), _), e2), _) =>
	54	(case (Env.string e1, Domain.ip e2) of
	55	(SOME v1, SOME v2) => SOME (A (v1, v2))
	56	\| _ => NONE)
	57	\| (EApp ((EApp ((EVar "dnsCNAME", _), e1), _), e2), _) =>
	58	(case (Env.string e1, Env.string e2) of
	59	(SOME v1, SOME v2) => SOME (CNAME (v1, v2))
	60	\| _ => NONE)
	61	\| (EApp ((EApp ((EVar "dnsMX", _), e1), _), e2), _) =>
	62	(case (Env.int e1, Env.string e2) of
	63	(SOME v1, SOME v2) => SOME (MX (v1, v2))
	64	\| _ => NONE)
	65	\| (EApp ((EVar "dnsNS", _), e), _) =>
	66	Option.map NS (Env.string e)
	67	\| _ => NONE
	68
	69	fun writeRecord (evs, r) =
	70	case !dns of
	71	NONE => print "Warning: DNS directive ignored because no master DNS server is configured for this domain\n"
	72	\| SOME file =>
	73	let
	74	fun write s = TextIO.output (file, s)
	75	val ttl = Env.env Env.int (evs, "TTL")
	76	in
	77	case r of
	78	A (from, to) => (write from;
	79	write ".";
	80	write (Domain.currentDomain ());
	81	write ".\t";
	82	write (Int.toString ttl);
	83	write "\tIN\tA\t";
	84	write to;
	85	write "\n")
	86	\| CNAME (from, to) => (write from;
	87	write ".";
	88	write (Domain.currentDomain ());
	89	write ".\t";
	90	write (Int.toString ttl);
	91	write "\tIN\tCNAME\t";
	92	write to;
	93	write ".\n")
	94	\| MX (num, host) => (write "\t";
	95	write (Int.toString ttl);
	96	write "\tIN\tMX\t";
	97	write (Int.toString num);
	98	write "\t";
	99	write host;
	100	write ".\n")
	101	\| NS host => (write "\t";
	102	write (Int.toString ttl);
	103	write "\tIN\tNS\t";
	104	write host;
	105	write ".\n")
	106	end
	107
	108	val () = Env.actionV_one "dns"
	109	("record", record)
	110	writeRecord
	111
	112	fun readLine inf =
	113	case TextIO.inputLine inf of
	114	NONE => raise Fail "Expected a line for BIND"
	115	\| SOME s => String.substring (s, 0, size s - 1)
	116
	117	fun readILine inf = valOf (Int.fromString (readLine inf))
	118
	119	val () = Slave.registerFileHandler (fn fs =>
	120	let
	121	val {dir, file} = OS.Path.splitDirFile (#file fs)
	122
	123	fun dnsChanged () =
	124	if #domain fs = !didDomain then
	125	()
	126	else if #action fs = Slave.Delete then
	127	let
	128	val fname = OS.Path.joinBaseExt {base = #domain fs,
	129	ext = SOME "zone"}
	130	val fname = OS.Path.joinDirFile {dir = Config.Bind.zonePath,
	131	file = fname}
	132	in
	133	Slave.shellF ([Config.rm, " -f ", fname],
	134	fn cl => "Error deleting file: " ^ cl)
	135	end
	136	else
	137	let
	138	val inf = TextIO.openIn (OS.Path.joinDirFile {dir = #dir fs,
	139	file = "soa"})
	140	val kind = readLine inf
	141	val ttl = readILine inf
	142	val ns = readLine inf
	143	val serial = case readLine inf of
	144	"" => NONE
	145	\| s => Int.fromString s
	146	val rf = readILine inf
	147	val ret = readILine inf
	148	val exp = readILine inf
	149	val min = readILine inf
	150	val () = TextIO.closeIn inf
	151
	152	val dns = OS.Path.joinDirFile {dir = #dir fs,
	153	file = "dns"}
	154
	155	val fname = OS.Path.joinBaseExt {base = #domain fs,
	156	ext = SOME "zone"}
	157	val fname = OS.Path.joinDirFile {dir = Config.Bind.zonePath,
	158	file = fname}
	159
	160	val outf = TextIO.openOut fname
	161	in
	162	zoneChanged := true;
	163	TextIO.output (outf, "$TTL ");
	164	TextIO.output (outf, Int.toString ttl);
	165	TextIO.output (outf, "\n\n@\tIN\tSOA\t");
	166	TextIO.output (outf, ns);
	167	TextIO.output (outf, ".\thostmaster.");
	168	TextIO.output (outf, #domain fs);
	169	TextIO.output (outf, ". ( ");
	170	TextIO.output (outf, Int.toString 123456789);
	171	TextIO.output (outf, " ");
	172	TextIO.output (outf, Int.toString rf);
	173	TextIO.output (outf, " ");
	174	TextIO.output (outf, Int.toString ret);
	175	TextIO.output (outf, " ");
	176	TextIO.output (outf, Int.toString exp);
	177	TextIO.output (outf, " ");
	178	TextIO.output (outf, Int.toString min);
	179	TextIO.output (outf, " )\n\n");
	180	TextIO.closeOut outf;
	181	if Posix.FileSys.access (dns, []) then
	182	Slave.shellF ([Config.cat, " ", dns, " >>", fname],
	183	fn cl => "Error concatenating file: " ^ cl)
	184	else
	185	();
	186	didDomain := #domain fs
	187	end
	188	in
	189	case file of
	190	"soa" => dnsChanged ()
	191	\| "dns" => dnsChanged ()
	192	\| "named.conf" => namedChanged := true
	193	\| _ => ()
	194	end)
	195
	196	val () = Slave.registerPostHandler
	197	(fn () =>
	198	(if !namedChanged then
	199	Slave.concatTo (fn s => s = "named.conf") Config.Bind.namedConf
	200	else
	201	();
	202	if !namedChanged orelse !zoneChanged then
	203	Slave.shellF ([Config.Bind.reload],
	204	fn cl => "Error reloading bind with " ^ cl)
	205	else
	206	()))
	207	end