[hcoop/domtool2.git] / src / domain.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.
 *)

(* Domain-related primitive actions *)

structure Domain :> DOMAIN = struct

open MsgTypes

structure SM = DataStructures.StringMap
structure SS = DataStructures.StringSet

val ssl_context = ref (NONE : OpenSSL.context option)
fun set_context ctx = ssl_context := SOME ctx

val nodes = map #1 Config.nodeIps
val nodeMap = foldl (fn ((node, ip), mp) => SM.insert (mp, node, ip))
		    SM.empty Config.nodeIps
fun nodeIp node = valOf (SM.find (nodeMap, node))

val usr = ref ""
fun getUser () = !usr

val your_doms = ref SS.empty
fun your_domains () = !your_doms

val your_usrs = ref SS.empty
fun your_users () = !your_usrs

val your_grps = ref SS.empty
fun your_groups () = !your_grps

val your_pths = ref SS.empty
fun your_paths () = !your_pths

fun setUser user =
    (usr := Config.testUser;
     your_doms := Acl.class {user = getUser (),
			     class = "domain"};
     your_usrs := Acl.class {user = getUser (),
			     class = "user"};
     your_grps := Acl.class {user = getUser (),
			     class = "group"};
     your_pths := Acl.class {user = getUser (),
			     class = "path"})

fun validIp s =
    case map Int.fromString (String.fields (fn ch => ch = #".") s) of
	[SOME n1, SOME n2, SOME n3, SOME n4] =>
	n1 >= 0 andalso n1 < 256 andalso n2 >= 0 andalso n2 < 256 andalso n3 >= 0 andalso n3 < 256 andalso n4 >= 0 andalso n4 < 256
      | _ => false

fun isIdent ch = Char.isLower ch orelse Char.isDigit ch

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

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

fun validNode s = List.exists (fn s' => s = s') nodes

fun yourDomain s = SS.member (your_domains (), s)
fun yourUser s = SS.member (your_users (), s)
fun yourGroup s = SS.member (your_groups (), s)
fun yourPath path =
    List.all (fn s => s <> "..") (String.fields (fn ch => ch = #"/") path)
    andalso CharVector.all (fn ch => Char.isAlphaNum ch orelse ch = #"." orelse ch = #"/"
				     orelse ch = #"-" orelse ch = #"_") path
    andalso SS.exists (fn s' => path = s' orelse String.isPrefix (s' ^ "/") path) (your_paths ())

fun yourDomainHost s =
    yourDomain s
    orelse let
	val (pref, suf) = Substring.splitl (fn ch => ch <> #".") (Substring.full s)
    in
	Substring.size suf > 0
	andalso validHost (Substring.string pref)
	andalso yourDomain (Substring.string
				(Substring.slice (suf, 1, NONE)))
    end

fun validUser s = size s > 0 andalso size s < 20
		  andalso CharVector.all Char.isAlphaNum s

val validGroup = validUser

val _ = Env.type_one "no_spaces"
		     Env.string
		     (CharVector.all (fn ch => not (Char.isSpace ch)))
val _ = Env.type_one "no_newlines"
		     Env.string
		     (CharVector.all (fn ch => ch <> #"\n" andalso ch <> #"\r"))

val _ = Env.type_one "ip"
	Env.string
	validIp

val _ = Env.type_one "host"
	Env.string
	validHost

val _ = Env.type_one "domain"
	Env.string
	validDomain

val _ = Env.type_one "your_domain"
	Env.string
	yourDomain

val _ = Env.type_one "your_domain_host"
	Env.string
	yourDomainHost

val _ = Env.type_one "user"
	Env.string
	validUser

val _ = Env.type_one "group"
	Env.string
	validGroup

val _ = Env.type_one "your_user"
	Env.string
	yourUser

val _ = Env.type_one "your_group"
	Env.string
	yourGroup

val _ = Env.type_one "your_path"
	Env.string
	yourPath

val _ = Env.type_one "node"
	Env.string
	validNode

open Ast

val dl = ErrorMsg.dummyLoc

val nsD = (EString Config.defaultNs, dl)
val serialD = (EVar "serialAuto", dl)
val refD = (EInt Config.defaultRefresh, dl)
val retD = (EInt Config.defaultRetry, dl)
val expD = (EInt Config.defaultExpiry, dl)
val minD = (EInt Config.defaultMinimum, dl)

val soaD = multiApp ((EVar "soa", dl),
		     dl,
		     [nsD, serialD, refD, retD, expD, minD])

val masterD = (EApp ((EVar "internalMaster", dl),
		     (EString Config.defaultNode, dl)),
	       dl)

val _ = Defaults.registerDefault ("Mailbox",
				  (TBase "email", dl),
				  (fn () => (EString (getUser ()), dl)))

val _ = Defaults.registerDefault ("DNS",
				  (TBase "dnsKind", dl),
				  (fn () => multiApp ((EVar "useDns", dl),
						      dl,
						      [soaD, masterD, (EList [], dl)])))

val _ = Defaults.registerDefault ("TTL",
				  (TBase "int", dl),
				  (fn () => (EInt Config.Bind.defaultTTL, dl)))

type soa = {ns : string,
	    serial : int option,
	    ref : int,
	    ret : int,
	    exp : int,
	    min : int}

val serial = fn (EVar "serialAuto", _) => SOME NONE
	      | (EApp ((EVar "serialConst", _), n), _) => Option.map SOME (Env.int n)
	      | _ => NONE

val soa = fn (EApp ((EApp ((EApp ((EApp ((EApp ((EApp 
						     ((EVar "soa", _), ns), _),
						sl), _),
					 rf), _),
				  ret), _),
			   exp), _),
		    min), _) =>
	     (case (Env.string ns, serial sl, Env.int rf,
		    Env.int ret, Env.int exp, Env.int min) of
		  (SOME ns, SOME sl, SOME rf,
		   SOME ret, SOME exp, SOME min) =>
		  SOME {ns = ns,
			serial = sl,
			ref = rf,
			ret = ret,
			exp = exp,
			min = min}
		| _ => NONE)
	   | _ => NONE

datatype master =
	 ExternalMaster of string
       | InternalMaster of string

val master = fn (EApp ((EVar "externalMaster", _), e), _) => Option.map ExternalMaster (Env.string e)
	      | (EApp ((EVar "internalMaster", _), e), _) => Option.map InternalMaster (Env.string e)
	      | _ => NONE

datatype dnsKind =
	 UseDns of {soa : soa,
		    master : master,
		    slaves : string list}
       | NoDns

val dnsKind = fn (EApp ((EApp ((EApp 
				    ((EVar "useDns", _), sa), _),
			       mstr), _),
			slaves), _) =>
		 (case (soa sa, master mstr, Env.list Env.string slaves) of
		      (SOME sa, SOME mstr, SOME slaves) =>
		      SOME (UseDns {soa = sa,
				    master = mstr,
				    slaves = slaves})
		    | _ => NONE)
	       | (EVar "noDns", _) => SOME NoDns
	       | _ => NONE

val befores = ref (fn (_ : string) => ())
val afters = ref (fn (_ : string) => ())

fun registerBefore f =
    let
	val old = !befores
    in
	befores := (fn x => (old x; f x))
    end

fun registerAfter f =
    let
	val old = !afters
    in
	afters := (fn x => (old x; f x))
    end

val current = ref ""
val currentPath = ref (fn (_ : string) => "")

val scratch = ref ""

fun currentDomain () = !current

fun domainFile {node, name} = ((*print ("Opening " ^ !currentPath node ^ name ^ "\n");*)
			       TextIO.openOut (!currentPath node ^ name))

fun getPath domain =
    let
	val toks = String.fields (fn ch => ch = #".") domain

	val elems = foldr (fn (piece, elems) =>
			      let
				  val elems = piece :: elems

				  fun doNode node =
				      let
					  val path = String.concatWith "/"
								       (Config.resultRoot :: node :: rev elems)
					  val tmpPath = String.concatWith "/"
									  (Config.tmpDir :: node :: rev elems)
				      in
					  (if Posix.FileSys.ST.isDir
						  (Posix.FileSys.stat path) then
					       ()
					   else
					       (OS.FileSys.remove path;
						OS.FileSys.mkDir path))
					  handle OS.SysErr _ => OS.FileSys.mkDir path;

					  (if Posix.FileSys.ST.isDir
						  (Posix.FileSys.stat tmpPath) then
					       ()
					   else
					       (OS.FileSys.remove tmpPath;
						OS.FileSys.mkDir tmpPath))
					  handle OS.SysErr _ => OS.FileSys.mkDir tmpPath
				      end
			      in
				  app doNode nodes;
				  elems
			      end) [] toks
    in
	fn (root, site) => String.concatWith "/" (root :: site :: rev ("" :: elems))
    end

datatype file_action' =
	 Add' of {src : string, dst : string}
       | Delete' of string
       | Modify' of {src : string, dst : string}

fun findDiffs (site, dom, acts) =
    let
	val gp = getPath dom
	val realPath = gp (Config.resultRoot, site)
	val tmpPath = gp (Config.tmpDir, site)

	(*val _ = print ("getDiffs(" ^ site ^ ", " ^ dom ^ ")... " ^ realPath ^ "; " ^ tmpPath ^ "\n")*)

	val dir = Posix.FileSys.opendir realPath

	fun loopReal acts =
	    case Posix.FileSys.readdir dir of
		NONE => (Posix.FileSys.closedir dir;
			 acts)
	      | SOME fname =>
		let
		    val real = OS.Path.joinDirFile {dir = realPath,
						    file = fname}
		    val tmp = OS.Path.joinDirFile {dir = tmpPath,
						   file = fname}
		in
		    if Posix.FileSys.ST.isDir (Posix.FileSys.stat real) then
			loopReal acts
		    else if Posix.FileSys.access (tmp, []) then
			if Slave.shell [Config.diff, " ", real, " ",  tmp] then
			    loopReal acts
			else
			    loopReal ((site, dom, realPath, Modify' {src = tmp, dst = real}) :: acts)
		    else
			loopReal ((site, dom, realPath, Delete' real) :: acts)
		end

	val acts = loopReal acts

	val dir = Posix.FileSys.opendir tmpPath

	fun loopTmp acts =
	    case Posix.FileSys.readdir dir of
		NONE => (Posix.FileSys.closedir dir;
			 acts)
	      | SOME fname =>
		let
		    val real = OS.Path.joinDirFile {dir = realPath,
						    file = fname}
		    val tmp = OS.Path.joinDirFile {dir = tmpPath,
						   file = fname}
		in
		    if Posix.FileSys.ST.isDir (Posix.FileSys.stat tmp) then
			loopTmp acts
		    else if Posix.FileSys.access (real, []) then
			loopTmp acts
		    else
			loopTmp ((site, dom, realPath, Add' {src = tmp, dst = real}) :: acts)
		end

	val acts = loopTmp acts
    in
	acts
    end

fun findAllDiffs () =
    let
	val dir = Posix.FileSys.opendir Config.tmpDir
	val len = length (String.fields (fn ch => ch = #"/") Config.tmpDir) + 1

	fun exploreSites diffs =
	    case Posix.FileSys.readdir dir of
		NONE => diffs
	      | SOME site =>
		let
		    fun explore (dname, diffs) =
			let
			    val dir = Posix.FileSys.opendir dname

			    fun loop diffs =
				case Posix.FileSys.readdir dir of
				    NONE => diffs
				  | SOME name =>
				    let
					val fname = OS.Path.joinDirFile {dir = dname,
									 file = name}
				    in
					loop (if Posix.FileSys.ST.isDir (Posix.FileSys.stat fname) then
						  let
						      val dom = String.fields (fn ch => ch = #"/") fname
						      val dom = List.drop (dom, len)
						      val dom = String.concatWith "." (rev dom)

						      val dname' = OS.Path.joinDirFile {dir = dname,
											file = name}
						  in
						      explore (dname',
							       findDiffs (site, dom, diffs))
						  end
					      else
						  diffs)
				    end
			in
			    loop diffs
			    before Posix.FileSys.closedir dir
			end
		in
		    exploreSites (explore (OS.Path.joinDirFile {dir = Config.tmpDir,
								file = site}, diffs))
		end
    in
	exploreSites []
	before Posix.FileSys.closedir dir
    end

val masterNode : string option ref = ref NONE
fun dnsMaster () = !masterNode

val _ = Env.containerV_one "domain"
			   ("domain", Env.string)
			   (fn (evs, dom) =>
			       let
				   val kind = Env.env dnsKind (evs, "DNS")
				   val ttl = Env.env Env.int (evs, "TTL")

				   val path = getPath dom

				   val () = (current := dom;
					     currentPath := (fn site => path (Config.tmpDir, site)))

				   fun saveSoa (kind, soa : soa) node =
				       let
					   val outf = domainFile {node = node, name = "soa"}
				       in
					   TextIO.output (outf, kind);
					   TextIO.output (outf, "\n");
					   TextIO.output (outf, Int.toString ttl);
					   TextIO.output (outf, "\n");
					   TextIO.output (outf, #ns soa);
					   TextIO.output (outf, "\n");
					   case #serial soa of
					       NONE => ()
					     | SOME n => TextIO.output (outf, Int.toString n);
					   TextIO.output (outf, "\n");
					   TextIO.output (outf, Int.toString (#ref soa));
					   TextIO.output (outf, "\n");
					   TextIO.output (outf, Int.toString (#ret soa));
					   TextIO.output (outf, "\n");
					   TextIO.output (outf, Int.toString (#exp soa));
					   TextIO.output (outf, "\n");
					   TextIO.output (outf, Int.toString (#min soa));
					   TextIO.output (outf, "\n");
					   TextIO.closeOut outf
				       end

				   fun saveNamed (kind, soa : soa, masterIp) node =
				       let
					   val outf = domainFile {node = node, name = "named.conf"}
				       in
					   TextIO.output (outf, "\nzone \"");
					   TextIO.output (outf, dom);
					   TextIO.output (outf, "\" IN {\n\ttype ");
					   TextIO.output (outf, kind);
					   TextIO.output (outf, ";\n\tfile \"");
					   TextIO.output (outf, Config.Bind.zonePath);
					   TextIO.output (outf, "/");
					   TextIO.output (outf, dom);
					   TextIO.output (outf, ".zone\";\n");
					   case kind of
					       "master" => TextIO.output (outf, "\tallow-update { none; };\n")
					     | _ => (TextIO.output (outf, "\tmasters { ");
						     TextIO.output (outf, masterIp);
						     TextIO.output (outf, " };\n"));
					   TextIO.output (outf, "};\n");
					   TextIO.closeOut outf
				       end
			       in
				   case kind of
				       NoDns => masterNode := NONE
				     | UseDns dns =>
				       let
					   val masterIp =
					       case #master dns of
						   InternalMaster node => valOf (SM.find (nodeMap, node))
						 | ExternalMaster ip => ip
				       in
					   app (saveSoa ("slave", #soa dns)) (#slaves dns);
					   app (saveNamed ("slave", #soa dns, masterIp)) (#slaves dns);
					   case #master dns of
					       InternalMaster node =>
					       (masterNode := SOME node;
						saveSoa ("master", #soa dns) node;
						saveNamed ("master", #soa dns, masterIp) node)
					     | _ => masterNode := NONE;
					   !befores dom
				       end
			       end,
			    fn () => !afters (!current))

val () = Env.registerPre (fn () => (ignore (Slave.shellF ([Config.rm, " -rf ", Config.tmpDir, ""],
						       fn cl => "Temp file cleanup failed: " ^ cl));
				    OS.FileSys.mkDir Config.tmpDir;
				    app (fn node => OS.FileSys.mkDir
							(OS.Path.joinDirFile {dir = Config.tmpDir,
									      file = node}))
					nodes;
				    app (fn node => OS.FileSys.mkDir
							(OS.Path.joinDirFile {dir = Config.resultRoot,
									      file = node})
					    handle OS.SysErr _ => ())
					nodes))

val () = Env.registerPost (fn () =>
			      let
				  val diffs = findAllDiffs ()

				  val diffs = map (fn (site, dom, dir, Add' {src, dst}) =>
						      (Slave.shellF ([Config.cp, " ", src, " ", dst],
								  fn cl => "Copy failed: " ^ cl);
						       (site,
							{action = Slave.Add,
							 domain = dom,
							 dir = dir,
							 file = dst}))
						    | (site, dom, dir, Delete' dst) =>
						      (OS.FileSys.remove dst
						       handle OS.SysErr _ =>
							      ErrorMsg.error NONE ("Delete failed for " ^ dst);
						       (site,
							{action = Slave.Delete,
							 domain = dom,
							 dir = dir,
							 file = dst}))
						    | (site, dom, dir, Modify' {src, dst}) =>
						      (Slave.shellF ([Config.cp, " ", src, " ", dst],
								  fn cl => "Copy failed: " ^ cl);
						       (site,
							{action = Slave.Modify,
							 domain = dom,
							 dir = dir,
							 file = dst}))) diffs
			      in
				  if !ErrorMsg.anyErrors then
				      ()
				  else let
					  val changed = foldl (fn ((site, file), changed) =>
								  let
								      val ls = case SM.find (changed, site) of
										   NONE => []
										 | SOME ls => ls
								  in
								      SM.insert (changed, site, file :: ls)
								  end) SM.empty diffs

					  fun handleSite (site, files) =
					      let
						  
					      in
						  print ("New configuration for node " ^ site ^ "\n");
						  if site = Config.defaultNode then
						      Slave.handleChanges files
						  else let
							  val bio = OpenSSL.connect (valOf (!ssl_context),
										     nodeIp site
										     ^ ":"
										     ^ Int.toString Config.slavePort)
						      in
							  app (fn file => Msg.send (bio, MsgFile file)) files;
							  Msg.send (bio, MsgDoFiles);
							  case Msg.recv bio of
							      NONE => print "Slave closed connection unexpectedly\n"
							    | SOME m =>
							      case m of
								  MsgOk => print ("Slave " ^ site ^ " finished\n")
								| MsgError s => print ("Slave " ^ site
										       ^ " returned error: " ^
										       s ^ "\n")
								| _ => print ("Slave " ^ site
									      ^ " returned unexpected command\n");
							  OpenSSL.close bio
						      end
					      end
				      in
					  SM.appi handleSite changed
				      end;
				  ignore (Slave.shellF ([Config.rm, " -rf ", Config.tmpDir, ""],
						     fn cl => "Temp file cleanup failed: " ^ cl))
			      end)

end
Commit	Line	Data
a3698041 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.
dac62e84	17	*)
a3698041 AC	18
	19	(* Domain-related primitive actions *)
	20
	21	structure Domain :> DOMAIN = struct
	22
36e42cb8 AC	23	open MsgTypes
36e42cb8 AC	24
2ed6d0e5	25	structure SM = DataStructures.StringMap
12adf55a	26	structure SS = DataStructures.StringSet
2ed6d0e5	27
36e42cb8 AC	28	val ssl_context = ref (NONE : OpenSSL.context option)
	29	fun set_context ctx = ssl_context := SOME ctx
	30
12adf55a	31	val nodes = map #1 Config.nodeIps
2ed6d0e5 AC	32	val nodeMap = foldl (fn ((node, ip), mp) => SM.insert (mp, node, ip))
2ed6d0e5 AC	33	SM.empty Config.nodeIps
8a7c40fa	34	fun nodeIp node = valOf (SM.find (nodeMap, node))
2ed6d0e5	35
12adf55a	36	val usr = ref ""
12adf55a AC	37	fun getUser () = !usr
	38
	39	val your_doms = ref SS.empty
	40	fun your_domains () = !your_doms
	41
8a7c40fa AC	42	val your_usrs = ref SS.empty
	43	fun your_users () = !your_usrs
	44
	45	val your_grps = ref SS.empty
	46	fun your_groups () = !your_grps
	47
	48	val your_pths = ref SS.empty
	49	fun your_paths () = !your_pths
	50
aa56e112 AC	51	fun setUser user =
	52	(usr := Config.testUser;
	53	your_doms := Acl.class {user = getUser (),
	54	class = "domain"};
	55	your_usrs := Acl.class {user = getUser (),
	56	class = "user"};
	57	your_grps := Acl.class {user = getUser (),
	58	class = "group"};
	59	your_pths := Acl.class {user = getUser (),
	60	class = "path"})
	61
6ae327f8 AC	62	fun validIp s =
	63	case map Int.fromString (String.fields (fn ch => ch = #".") s) of
	64	[SOME n1, SOME n2, SOME n3, SOME n4] =>
	65	n1 >= 0 andalso n1 < 256 andalso n2 >= 0 andalso n2 < 256 andalso n3 >= 0 andalso n3 < 256 andalso n4 >= 0 andalso n4 < 256
	66	\| _ => false
	67
629a34f6 AC	68	fun isIdent ch = Char.isLower ch orelse Char.isDigit ch
	69
	70	fun validHost s =
	71	size s > 0 andalso size s < 20
	72	andalso CharVector.all (fn ch => isIdent ch orelse ch = #"-") s
	73
	74	fun validDomain s =
	75	size s > 0 andalso size s < 100
	76	andalso List.all validHost (String.fields (fn ch => ch = #".") s)
	77
2ed6d0e5	78	fun validNode s = List.exists (fn s' => s = s') nodes
e0b0abd2	79
12adf55a	80	fun yourDomain s = SS.member (your_domains (), s)
8a7c40fa AC	81	fun yourUser s = SS.member (your_users (), s)
	82	fun yourGroup s = SS.member (your_groups (), s)
	83	fun yourPath path =
	84	List.all (fn s => s <> "..") (String.fields (fn ch => ch = #"/") path)
	85	andalso CharVector.all (fn ch => Char.isAlphaNum ch orelse ch = #"." orelse ch = #"/"
	86	orelse ch = #"-" orelse ch = #"_") path
	87	andalso SS.exists (fn s' => path = s' orelse String.isPrefix (s' ^ "/") path) (your_paths ())
12adf55a	88
edd38024	89	fun yourDomainHost s =
c98b57cf AC	90	yourDomain s
c98b57cf AC	91	orelse let
edd38024 AC	92	val (pref, suf) = Substring.splitl (fn ch => ch <> #".") (Substring.full s)
edd38024 AC	93	in
edd38024 AC	94	Substring.size suf > 0
	95	andalso validHost (Substring.string pref)
	96	andalso yourDomain (Substring.string
c98b57cf	97	(Substring.slice (suf, 1, NONE)))
edd38024 AC	98	end
edd38024 AC	99
2aeb9eec AC	100	fun validUser s = size s > 0 andalso size s < 20
	101	andalso CharVector.all Char.isAlphaNum s
	102
	103	val validGroup = validUser
	104
f8dfbbcc AC	105	val _ = Env.type_one "no_spaces"
	106	Env.string
	107	(CharVector.all (fn ch => not (Char.isSpace ch)))
d5754b53 AC	108	val _ = Env.type_one "no_newlines"
	109	Env.string
	110	(CharVector.all (fn ch => ch <> #"\n" andalso ch <> #"\r"))
f8dfbbcc	111
6ae327f8 AC	112	val _ = Env.type_one "ip"
	113	Env.string
	114	validIp
	115
629a34f6 AC	116	val _ = Env.type_one "host"
	117	Env.string
	118	validHost
	119
	120	val _ = Env.type_one "domain"
	121	Env.string
	122	validDomain
	123
12adf55a AC	124	val _ = Env.type_one "your_domain"
	125	Env.string
	126	yourDomain
	127
edd38024 AC	128	val _ = Env.type_one "your_domain_host"
	129	Env.string
	130	yourDomainHost
	131
2aeb9eec AC	132	val _ = Env.type_one "user"
	133	Env.string
	134	validUser
	135
	136	val _ = Env.type_one "group"
	137	Env.string
	138	validGroup
	139
8a7c40fa AC	140	val _ = Env.type_one "your_user"
	141	Env.string
	142	yourUser
	143
	144	val _ = Env.type_one "your_group"
	145	Env.string
	146	yourGroup
	147
	148	val _ = Env.type_one "your_path"
	149	Env.string
	150	yourPath
	151
e0b0abd2 AC	152	val _ = Env.type_one "node"
	153	Env.string
	154	validNode
	155
a3698041 AC	156	open Ast
a3698041 AC	157
6ae327f8 AC	158	val dl = ErrorMsg.dummyLoc
	159
	160	val nsD = (EString Config.defaultNs, dl)
	161	val serialD = (EVar "serialAuto", dl)
	162	val refD = (EInt Config.defaultRefresh, dl)
	163	val retD = (EInt Config.defaultRetry, dl)
	164	val expD = (EInt Config.defaultExpiry, dl)
	165	val minD = (EInt Config.defaultMinimum, dl)
	166
	167	val soaD = multiApp ((EVar "soa", dl),
	168	dl,
	169	[nsD, serialD, refD, retD, expD, minD])
	170
e0b0abd2 AC	171	val masterD = (EApp ((EVar "internalMaster", dl),
	172	(EString Config.defaultNode, dl)),
	173	dl)
	174
6bb366c5 AC	175	val _ = Defaults.registerDefault ("Mailbox",
	176	(TBase "email", dl),
	177	(fn () => (EString (getUser ()), dl)))
	178
aa56e112 AC	179	val _ = Defaults.registerDefault ("DNS",
	180	(TBase "dnsKind", dl),
	181	(fn () => multiApp ((EVar "useDns", dl),
	182	dl,
	183	[soaD, masterD, (EList [], dl)])))
6ae327f8	184
aa56e112 AC	185	val _ = Defaults.registerDefault ("TTL",
	186	(TBase "int", dl),
	187	(fn () => (EInt Config.Bind.defaultTTL, dl)))
6ae327f8 AC	188
	189	type soa = {ns : string,
	190	serial : int option,
	191	ref : int,
	192	ret : int,
	193	exp : int,
	194	min : int}
	195
	196	val serial = fn (EVar "serialAuto", _) => SOME NONE
	197	\| (EApp ((EVar "serialConst", _), n), _) => Option.map SOME (Env.int n)
	198	\| _ => NONE
	199
	200	val soa = fn (EApp ((EApp ((EApp ((EApp ((EApp ((EApp
	201	((EVar "soa", _), ns), _),
	202	sl), _),
	203	rf), _),
	204	ret), _),
	205	exp), _),
	206	min), _) =>
	207	(case (Env.string ns, serial sl, Env.int rf,
	208	Env.int ret, Env.int exp, Env.int min) of
	209	(SOME ns, SOME sl, SOME rf,
	210	SOME ret, SOME exp, SOME min) =>
	211	SOME {ns = ns,
	212	serial = sl,
	213	ref = rf,
	214	ret = ret,
	215	exp = exp,
	216	min = min}
	217	\| _ => NONE)
	218	\| _ => NONE
	219
e0b0abd2 AC	220	datatype master =
	221	ExternalMaster of string
	222	\| InternalMaster of string
	223
	224	val master = fn (EApp ((EVar "externalMaster", _), e), _) => Option.map ExternalMaster (Env.string e)
	225	\| (EApp ((EVar "internalMaster", _), e), _) => Option.map InternalMaster (Env.string e)
	226	\| _ => NONE
	227
6ae327f8	228	datatype dnsKind =
e0b0abd2 AC	229	UseDns of {soa : soa,
	230	master : master,
	231	slaves : string list}
6ae327f8 AC	232	\| NoDns
6ae327f8 AC	233
e0b0abd2 AC	234	val dnsKind = fn (EApp ((EApp ((EApp
	235	((EVar "useDns", _), sa), _),
	236	mstr), _),
	237	slaves), _) =>
	238	(case (soa sa, master mstr, Env.list Env.string slaves) of
	239	(SOME sa, SOME mstr, SOME slaves) =>
	240	SOME (UseDns {soa = sa,
	241	master = mstr,
	242	slaves = slaves})
	243	\| _ => NONE)
325285ab	244	\| (EVar "noDns", _) => SOME NoDns
6ae327f8 AC	245	\| _ => NONE
6ae327f8 AC	246
a3698041 AC	247	val befores = ref (fn (_ : string) => ())
	248	val afters = ref (fn (_ : string) => ())
	249
	250	fun registerBefore f =
	251	let
	252	val old = !befores
	253	in
	254	befores := (fn x => (old x; f x))
	255	end
	256
	257	fun registerAfter f =
	258	let
	259	val old = !afters
	260	in
	261	afters := (fn x => (old x; f x))
	262	end
	263
	264	val current = ref ""
e0b0abd2	265	val currentPath = ref (fn (_ : string) => "")
dac62e84	266
d612d62c AC	267	val scratch = ref ""
d612d62c AC	268
dac62e84 AC	269	fun currentDomain () = !current
dac62e84 AC	270
e0b0abd2 AC	271	fun domainFile {node, name} = ((print ("Opening " ^ !currentPath node ^ name ^ "\n");)
e0b0abd2 AC	272	TextIO.openOut (!currentPath node ^ name))
dac62e84 AC	273
	274	fun getPath domain =
	275	let
	276	val toks = String.fields (fn ch => ch = #".") domain
	277
	278	val elems = foldr (fn (piece, elems) =>
	279	let
	280	val elems = piece :: elems
d612d62c	281
e0b0abd2 AC	282	fun doNode node =
	283	let
	284	val path = String.concatWith "/"
	285	(Config.resultRoot :: node :: rev elems)
	286	val tmpPath = String.concatWith "/"
	287	(Config.tmpDir :: node :: rev elems)
	288	in
	289	(if Posix.FileSys.ST.isDir
	290	(Posix.FileSys.stat path) then
	291	()
	292	else
	293	(OS.FileSys.remove path;
	294	OS.FileSys.mkDir path))
	295	handle OS.SysErr _ => OS.FileSys.mkDir path;
	296
	297	(if Posix.FileSys.ST.isDir
	298	(Posix.FileSys.stat tmpPath) then
	299	()
	300	else
	301	(OS.FileSys.remove tmpPath;
	302	OS.FileSys.mkDir tmpPath))
	303	handle OS.SysErr _ => OS.FileSys.mkDir tmpPath
	304	end
	305	in
2ed6d0e5	306	app doNode nodes;
dac62e84 AC	307	elems
	308	end) [] toks
	309	in
e0b0abd2	310	fn (root, site) => String.concatWith "/" (root :: site :: rev ("" :: elems))
d612d62c AC	311	end
	312
	313	datatype file_action' =
	314	Add' of {src : string, dst : string}
	315	\| Delete' of string
	316	\| Modify' of {src : string, dst : string}
	317
e0b0abd2	318	fun findDiffs (site, dom, acts) =
d612d62c	319	let
e0b0abd2 AC	320	val gp = getPath dom
	321	val realPath = gp (Config.resultRoot, site)
	322	val tmpPath = gp (Config.tmpDir, site)
	323
	324	(val _ = print ("getDiffs(" ^ site ^ ", " ^ dom ^ ")... " ^ realPath ^ "; " ^ tmpPath ^ "\n"))
d612d62c AC	325
	326	val dir = Posix.FileSys.opendir realPath
	327
	328	fun loopReal acts =
	329	case Posix.FileSys.readdir dir of
	330	NONE => (Posix.FileSys.closedir dir;
	331	acts)
	332	\| SOME fname =>
	333	let
	334	val real = OS.Path.joinDirFile {dir = realPath,
	335	file = fname}
	336	val tmp = OS.Path.joinDirFile {dir = tmpPath,
	337	file = fname}
	338	in
	339	if Posix.FileSys.ST.isDir (Posix.FileSys.stat real) then
	340	loopReal acts
	341	else if Posix.FileSys.access (tmp, []) then
8df2e702	342	if Slave.shell [Config.diff, " ", real, " ", tmp] then
d612d62c AC	343	loopReal acts
d612d62c AC	344	else
e0b0abd2	345	loopReal ((site, dom, realPath, Modify' {src = tmp, dst = real}) :: acts)
d612d62c	346	else
e0b0abd2	347	loopReal ((site, dom, realPath, Delete' real) :: acts)
d612d62c AC	348	end
d612d62c AC	349
e0b0abd2	350	val acts = loopReal acts
d612d62c	351
8df2e702	352	val dir = Posix.FileSys.opendir tmpPath
d612d62c AC	353
	354	fun loopTmp acts =
	355	case Posix.FileSys.readdir dir of
	356	NONE => (Posix.FileSys.closedir dir;
	357	acts)
	358	\| SOME fname =>
	359	let
	360	val real = OS.Path.joinDirFile {dir = realPath,
	361	file = fname}
	362	val tmp = OS.Path.joinDirFile {dir = tmpPath,
	363	file = fname}
	364	in
	365	if Posix.FileSys.ST.isDir (Posix.FileSys.stat tmp) then
	366	loopTmp acts
	367	else if Posix.FileSys.access (real, []) then
	368	loopTmp acts
	369	else
e0b0abd2	370	loopTmp ((site, dom, realPath, Add' {src = tmp, dst = real}) :: acts)
d612d62c AC	371	end
	372
	373	val acts = loopTmp acts
	374	in
	375	acts
dac62e84	376	end
a3698041	377
e0b0abd2 AC	378	fun findAllDiffs () =
	379	let
	380	val dir = Posix.FileSys.opendir Config.tmpDir
	381	val len = length (String.fields (fn ch => ch = #"/") Config.tmpDir) + 1
	382
	383	fun exploreSites diffs =
	384	case Posix.FileSys.readdir dir of
	385	NONE => diffs
	386	\| SOME site =>
	387	let
	388	fun explore (dname, diffs) =
	389	let
	390	val dir = Posix.FileSys.opendir dname
	391
	392	fun loop diffs =
	393	case Posix.FileSys.readdir dir of
	394	NONE => diffs
	395	\| SOME name =>
	396	let
	397	val fname = OS.Path.joinDirFile {dir = dname,
	398	file = name}
	399	in
	400	loop (if Posix.FileSys.ST.isDir (Posix.FileSys.stat fname) then
	401	let
	402	val dom = String.fields (fn ch => ch = #"/") fname
	403	val dom = List.drop (dom, len)
	404	val dom = String.concatWith "." (rev dom)
	405
	406	val dname' = OS.Path.joinDirFile {dir = dname,
	407	file = name}
	408	in
	409	explore (dname',
	410	findDiffs (site, dom, diffs))
	411	end
	412	else
	413	diffs)
	414	end
	415	in
	416	loop diffs
	417	before Posix.FileSys.closedir dir
	418	end
	419	in
36e42cb8 AC	420	exploreSites (explore (OS.Path.joinDirFile {dir = Config.tmpDir,
36e42cb8 AC	421	file = site}, diffs))
e0b0abd2 AC	422	end
	423	in
	424	exploreSites []
	425	before Posix.FileSys.closedir dir
	426	end
	427
	428	val masterNode : string option ref = ref NONE
	429	fun dnsMaster () = !masterNode
	430
6ae327f8 AC	431	val _ = Env.containerV_one "domain"
	432	("domain", Env.string)
	433	(fn (evs, dom) =>
	434	let
	435	val kind = Env.env dnsKind (evs, "DNS")
	436	val ttl = Env.env Env.int (evs, "TTL")
	437
e0b0abd2	438	val path = getPath dom
6ae327f8 AC	439
6ae327f8 AC	440	val () = (current := dom;
e0b0abd2	441	currentPath := (fn site => path (Config.tmpDir, site)))
6ae327f8	442
e0b0abd2	443	fun saveSoa (kind, soa : soa) node =
6ae327f8	444	let
e0b0abd2	445	val outf = domainFile {node = node, name = "soa"}
6ae327f8 AC	446	in
	447	TextIO.output (outf, kind);
	448	TextIO.output (outf, "\n");
	449	TextIO.output (outf, Int.toString ttl);
	450	TextIO.output (outf, "\n");
	451	TextIO.output (outf, #ns soa);
	452	TextIO.output (outf, "\n");
	453	case #serial soa of
	454	NONE => ()
	455	\| SOME n => TextIO.output (outf, Int.toString n);
	456	TextIO.output (outf, "\n");
	457	TextIO.output (outf, Int.toString (#ref soa));
	458	TextIO.output (outf, "\n");
	459	TextIO.output (outf, Int.toString (#ret soa));
	460	TextIO.output (outf, "\n");
	461	TextIO.output (outf, Int.toString (#exp soa));
	462	TextIO.output (outf, "\n");
	463	TextIO.output (outf, Int.toString (#min soa));
	464	TextIO.output (outf, "\n");
	465	TextIO.closeOut outf
	466	end
	467
2ed6d0e5	468	fun saveNamed (kind, soa : soa, masterIp) node =
6ae327f8	469	let
e0b0abd2	470	val outf = domainFile {node = node, name = "named.conf"}
6ae327f8 AC	471	in
	472	TextIO.output (outf, "\nzone \"");
	473	TextIO.output (outf, dom);
	474	TextIO.output (outf, "\" IN {\n\ttype ");
	475	TextIO.output (outf, kind);
	476	TextIO.output (outf, ";\n\tfile \"");
	477	TextIO.output (outf, Config.Bind.zonePath);
	478	TextIO.output (outf, "/");
	479	TextIO.output (outf, dom);
	480	TextIO.output (outf, ".zone\";\n");
	481	case kind of
	482	"master" => TextIO.output (outf, "\tallow-update { none; };\n")
2ed6d0e5 AC	483	\| _ => (TextIO.output (outf, "\tmasters { ");
	484	TextIO.output (outf, masterIp);
	485	TextIO.output (outf, " };\n"));
	486	TextIO.output (outf, "};\n");
6ae327f8 AC	487	TextIO.closeOut outf
6ae327f8 AC	488	end
6ae327f8 AC	489	in
6ae327f8 AC	490	case kind of
e0b0abd2 AC	491	NoDns => masterNode := NONE
e0b0abd2 AC	492	\| UseDns dns =>
2ed6d0e5 AC	493	let
	494	val masterIp =
	495	case #master dns of
	496	InternalMaster node => valOf (SM.find (nodeMap, node))
	497	\| ExternalMaster ip => ip
	498	in
	499	app (saveSoa ("slave", #soa dns)) (#slaves dns);
	500	app (saveNamed ("slave", #soa dns, masterIp)) (#slaves dns);
	501	case #master dns of
	502	InternalMaster node =>
	503	(masterNode := SOME node;
	504	saveSoa ("master", #soa dns) node;
	505	saveNamed ("master", #soa dns, masterIp) node)
	506	\| _ => masterNode := NONE;
	507	!befores dom
	508	end
6ae327f8	509	end,
e0b0abd2 AC	510	fn () => !afters (!current))
	511
	512	val () = Env.registerPre (fn () => (ignore (Slave.shellF ([Config.rm, " -rf ", Config.tmpDir, ""],
	513	fn cl => "Temp file cleanup failed: " ^ cl));
	514	OS.FileSys.mkDir Config.tmpDir;
	515	app (fn node => OS.FileSys.mkDir
	516	(OS.Path.joinDirFile {dir = Config.tmpDir,
	517	file = node}))
2ed6d0e5	518	nodes;
e0b0abd2 AC	519	app (fn node => OS.FileSys.mkDir
	520	(OS.Path.joinDirFile {dir = Config.resultRoot,
	521	file = node})
	522	handle OS.SysErr _ => ())
2ed6d0e5	523	nodes))
e0b0abd2 AC	524
	525	val () = Env.registerPost (fn () =>
	526	let
	527	val diffs = findAllDiffs ()
6ae327f8	528
e0b0abd2 AC	529	val diffs = map (fn (site, dom, dir, Add' {src, dst}) =>
	530	(Slave.shellF ([Config.cp, " ", src, " ", dst],
	531	fn cl => "Copy failed: " ^ cl);
	532	(site,
6ae327f8 AC	533	{action = Slave.Add,
	534	domain = dom,
	535	dir = dir,
e0b0abd2 AC	536	file = dst}))
	537	\| (site, dom, dir, Delete' dst) =>
	538	(OS.FileSys.remove dst
	539	handle OS.SysErr _ =>
	540	ErrorMsg.error NONE ("Delete failed for " ^ dst);
	541	(site,
6ae327f8 AC	542	{action = Slave.Delete,
	543	domain = dom,
	544	dir = dir,
e0b0abd2 AC	545	file = dst}))
	546	\| (site, dom, dir, Modify' {src, dst}) =>
	547	(Slave.shellF ([Config.cp, " ", src, " ", dst],
	548	fn cl => "Copy failed: " ^ cl);
	549	(site,
6ae327f8 AC	550	{action = Slave.Modify,
	551	domain = dom,
	552	dir = dir,
e0b0abd2 AC	553	file = dst}))) diffs
	554	in
	555	if !ErrorMsg.anyErrors then
	556	()
36e42cb8 AC	557	else let
	558	val changed = foldl (fn ((site, file), changed) =>
	559	let
	560	val ls = case SM.find (changed, site) of
	561	NONE => []
	562	\| SOME ls => ls
	563	in
	564	SM.insert (changed, site, file :: ls)
	565	end) SM.empty diffs
	566
	567	fun handleSite (site, files) =
	568	let
	569
	570	in
	571	print ("New configuration for node " ^ site ^ "\n");
	572	if site = Config.defaultNode then
	573	Slave.handleChanges files
	574	else let
	575	val bio = OpenSSL.connect (valOf (!ssl_context),
	576	nodeIp site
	577	^ ":"
	578	^ Int.toString Config.slavePort)
	579	in
	580	app (fn file => Msg.send (bio, MsgFile file)) files;
	581	Msg.send (bio, MsgDoFiles);
	582	case Msg.recv bio of
	583	NONE => print "Slave closed connection unexpectedly\n"
	584	\| SOME m =>
	585	case m of
	586	MsgOk => print ("Slave " ^ site ^ " finished\n")
	587	\| MsgError s => print ("Slave " ^ site
	588	^ " returned error: " ^
	589	s ^ "\n")
	590	\| _ => print ("Slave " ^ site
	591	^ " returned unexpected command\n");
	592	OpenSSL.close bio
	593	end
	594	end
	595	in
	596	SM.appi handleSite changed
	597	end;
e0b0abd2	598	ignore (Slave.shellF ([Config.rm, " -rf ", Config.tmpDir, ""],
559e89e9	599	fn cl => "Temp file cleanup failed: " ^ cl))
e0b0abd2	600	end)
6ae327f8	601
a3698041	602	end