[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 := user;
     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 ip = fn (EApp ((EVar "ip_of_node", _), e), _) => Option.map nodeIp (Env.string e)
	  | e => Env.string e

val master = fn (EApp ((EVar "externalMaster", _), e), _) => Option.map ExternalMaster (ip e)
	      | (EApp ((EVar "internalMaster", _), e), _) => Option.map InternalMaster (ip 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_real);
					   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	51	fun setUser user =
a088cea6	52	(usr := user;
aa56e112 AC	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
97665758 AC	224	val ip = fn (EApp ((EVar "ip_of_node", _), e), _) => Option.map nodeIp (Env.string e)
	225	\| e => Env.string e
	226
	227	val master = fn (EApp ((EVar "externalMaster", _), e), _) => Option.map ExternalMaster (ip e)
	228	\| (EApp ((EVar "internalMaster", _), e), _) => Option.map InternalMaster (ip e)
e0b0abd2 AC	229	\| _ => NONE
e0b0abd2 AC	230
6ae327f8	231	datatype dnsKind =
e0b0abd2 AC	232	UseDns of {soa : soa,
	233	master : master,
	234	slaves : string list}
6ae327f8 AC	235	\| NoDns
6ae327f8 AC	236
e0b0abd2 AC	237	val dnsKind = fn (EApp ((EApp ((EApp
	238	((EVar "useDns", _), sa), _),
	239	mstr), _),
	240	slaves), _) =>
	241	(case (soa sa, master mstr, Env.list Env.string slaves) of
	242	(SOME sa, SOME mstr, SOME slaves) =>
	243	SOME (UseDns {soa = sa,
	244	master = mstr,
	245	slaves = slaves})
	246	\| _ => NONE)
325285ab	247	\| (EVar "noDns", _) => SOME NoDns
6ae327f8 AC	248	\| _ => NONE
6ae327f8 AC	249
a3698041 AC	250	val befores = ref (fn (_ : string) => ())
	251	val afters = ref (fn (_ : string) => ())
	252
	253	fun registerBefore f =
	254	let
	255	val old = !befores
	256	in
	257	befores := (fn x => (old x; f x))
	258	end
	259
	260	fun registerAfter f =
	261	let
	262	val old = !afters
	263	in
	264	afters := (fn x => (old x; f x))
	265	end
	266
	267	val current = ref ""
e0b0abd2	268	val currentPath = ref (fn (_ : string) => "")
dac62e84	269
d612d62c AC	270	val scratch = ref ""
d612d62c AC	271
dac62e84 AC	272	fun currentDomain () = !current
dac62e84 AC	273
e0b0abd2 AC	274	fun domainFile {node, name} = ((print ("Opening " ^ !currentPath node ^ name ^ "\n");)
e0b0abd2 AC	275	TextIO.openOut (!currentPath node ^ name))
dac62e84 AC	276
	277	fun getPath domain =
	278	let
	279	val toks = String.fields (fn ch => ch = #".") domain
	280
	281	val elems = foldr (fn (piece, elems) =>
	282	let
	283	val elems = piece :: elems
d612d62c	284
e0b0abd2 AC	285	fun doNode node =
	286	let
	287	val path = String.concatWith "/"
	288	(Config.resultRoot :: node :: rev elems)
	289	val tmpPath = String.concatWith "/"
	290	(Config.tmpDir :: node :: rev elems)
	291	in
	292	(if Posix.FileSys.ST.isDir
	293	(Posix.FileSys.stat path) then
	294	()
	295	else
	296	(OS.FileSys.remove path;
	297	OS.FileSys.mkDir path))
	298	handle OS.SysErr _ => OS.FileSys.mkDir path;
	299
	300	(if Posix.FileSys.ST.isDir
	301	(Posix.FileSys.stat tmpPath) then
	302	()
	303	else
	304	(OS.FileSys.remove tmpPath;
	305	OS.FileSys.mkDir tmpPath))
	306	handle OS.SysErr _ => OS.FileSys.mkDir tmpPath
	307	end
	308	in
2ed6d0e5	309	app doNode nodes;
dac62e84 AC	310	elems
	311	end) [] toks
	312	in
e0b0abd2	313	fn (root, site) => String.concatWith "/" (root :: site :: rev ("" :: elems))
d612d62c AC	314	end
	315
	316	datatype file_action' =
	317	Add' of {src : string, dst : string}
	318	\| Delete' of string
	319	\| Modify' of {src : string, dst : string}
	320
e0b0abd2	321	fun findDiffs (site, dom, acts) =
d612d62c	322	let
e0b0abd2 AC	323	val gp = getPath dom
	324	val realPath = gp (Config.resultRoot, site)
	325	val tmpPath = gp (Config.tmpDir, site)
	326
	327	(val _ = print ("getDiffs(" ^ site ^ ", " ^ dom ^ ")... " ^ realPath ^ "; " ^ tmpPath ^ "\n"))
d612d62c AC	328
	329	val dir = Posix.FileSys.opendir realPath
	330
	331	fun loopReal acts =
	332	case Posix.FileSys.readdir dir of
	333	NONE => (Posix.FileSys.closedir dir;
	334	acts)
	335	\| SOME fname =>
	336	let
	337	val real = OS.Path.joinDirFile {dir = realPath,
	338	file = fname}
	339	val tmp = OS.Path.joinDirFile {dir = tmpPath,
	340	file = fname}
	341	in
	342	if Posix.FileSys.ST.isDir (Posix.FileSys.stat real) then
	343	loopReal acts
	344	else if Posix.FileSys.access (tmp, []) then
8df2e702	345	if Slave.shell [Config.diff, " ", real, " ", tmp] then
d612d62c AC	346	loopReal acts
d612d62c AC	347	else
e0b0abd2	348	loopReal ((site, dom, realPath, Modify' {src = tmp, dst = real}) :: acts)
d612d62c	349	else
e0b0abd2	350	loopReal ((site, dom, realPath, Delete' real) :: acts)
d612d62c AC	351	end
d612d62c AC	352
e0b0abd2	353	val acts = loopReal acts
d612d62c	354
8df2e702	355	val dir = Posix.FileSys.opendir tmpPath
d612d62c AC	356
	357	fun loopTmp acts =
	358	case Posix.FileSys.readdir dir of
	359	NONE => (Posix.FileSys.closedir dir;
	360	acts)
	361	\| SOME fname =>
	362	let
	363	val real = OS.Path.joinDirFile {dir = realPath,
	364	file = fname}
	365	val tmp = OS.Path.joinDirFile {dir = tmpPath,
	366	file = fname}
	367	in
	368	if Posix.FileSys.ST.isDir (Posix.FileSys.stat tmp) then
	369	loopTmp acts
	370	else if Posix.FileSys.access (real, []) then
	371	loopTmp acts
	372	else
e0b0abd2	373	loopTmp ((site, dom, realPath, Add' {src = tmp, dst = real}) :: acts)
d612d62c AC	374	end
	375
	376	val acts = loopTmp acts
	377	in
	378	acts
dac62e84	379	end
a3698041	380
e0b0abd2 AC	381	fun findAllDiffs () =
	382	let
	383	val dir = Posix.FileSys.opendir Config.tmpDir
	384	val len = length (String.fields (fn ch => ch = #"/") Config.tmpDir) + 1
	385
	386	fun exploreSites diffs =
	387	case Posix.FileSys.readdir dir of
	388	NONE => diffs
	389	\| SOME site =>
	390	let
	391	fun explore (dname, diffs) =
	392	let
	393	val dir = Posix.FileSys.opendir dname
	394
	395	fun loop diffs =
	396	case Posix.FileSys.readdir dir of
	397	NONE => diffs
	398	\| SOME name =>
	399	let
	400	val fname = OS.Path.joinDirFile {dir = dname,
	401	file = name}
	402	in
	403	loop (if Posix.FileSys.ST.isDir (Posix.FileSys.stat fname) then
	404	let
	405	val dom = String.fields (fn ch => ch = #"/") fname
	406	val dom = List.drop (dom, len)
	407	val dom = String.concatWith "." (rev dom)
	408
	409	val dname' = OS.Path.joinDirFile {dir = dname,
	410	file = name}
	411	in
	412	explore (dname',
	413	findDiffs (site, dom, diffs))
	414	end
	415	else
	416	diffs)
	417	end
	418	in
	419	loop diffs
	420	before Posix.FileSys.closedir dir
	421	end
	422	in
36e42cb8 AC	423	exploreSites (explore (OS.Path.joinDirFile {dir = Config.tmpDir,
36e42cb8 AC	424	file = site}, diffs))
e0b0abd2 AC	425	end
	426	in
	427	exploreSites []
	428	before Posix.FileSys.closedir dir
	429	end
	430
	431	val masterNode : string option ref = ref NONE
	432	fun dnsMaster () = !masterNode
	433
6ae327f8 AC	434	val _ = Env.containerV_one "domain"
	435	("domain", Env.string)
	436	(fn (evs, dom) =>
	437	let
	438	val kind = Env.env dnsKind (evs, "DNS")
	439	val ttl = Env.env Env.int (evs, "TTL")
	440
e0b0abd2	441	val path = getPath dom
6ae327f8 AC	442
6ae327f8 AC	443	val () = (current := dom;
e0b0abd2	444	currentPath := (fn site => path (Config.tmpDir, site)))
6ae327f8	445
e0b0abd2	446	fun saveSoa (kind, soa : soa) node =
6ae327f8	447	let
e0b0abd2	448	val outf = domainFile {node = node, name = "soa"}
6ae327f8 AC	449	in
	450	TextIO.output (outf, kind);
	451	TextIO.output (outf, "\n");
	452	TextIO.output (outf, Int.toString ttl);
	453	TextIO.output (outf, "\n");
	454	TextIO.output (outf, #ns soa);
	455	TextIO.output (outf, "\n");
	456	case #serial soa of
	457	NONE => ()
	458	\| SOME n => TextIO.output (outf, Int.toString n);
	459	TextIO.output (outf, "\n");
	460	TextIO.output (outf, Int.toString (#ref soa));
	461	TextIO.output (outf, "\n");
	462	TextIO.output (outf, Int.toString (#ret soa));
	463	TextIO.output (outf, "\n");
	464	TextIO.output (outf, Int.toString (#exp soa));
	465	TextIO.output (outf, "\n");
	466	TextIO.output (outf, Int.toString (#min soa));
	467	TextIO.output (outf, "\n");
	468	TextIO.closeOut outf
	469	end
	470
2ed6d0e5	471	fun saveNamed (kind, soa : soa, masterIp) node =
6ae327f8	472	let
e0b0abd2	473	val outf = domainFile {node = node, name = "named.conf"}
6ae327f8 AC	474	in
	475	TextIO.output (outf, "\nzone \"");
	476	TextIO.output (outf, dom);
	477	TextIO.output (outf, "\" IN {\n\ttype ");
	478	TextIO.output (outf, kind);
	479	TextIO.output (outf, ";\n\tfile \"");
27e20924	480	TextIO.output (outf, Config.Bind.zonePath_real);
6ae327f8 AC	481	TextIO.output (outf, "/");
	482	TextIO.output (outf, dom);
	483	TextIO.output (outf, ".zone\";\n");
	484	case kind of
	485	"master" => TextIO.output (outf, "\tallow-update { none; };\n")
2ed6d0e5 AC	486	\| _ => (TextIO.output (outf, "\tmasters { ");
	487	TextIO.output (outf, masterIp);
	488	TextIO.output (outf, " };\n"));
	489	TextIO.output (outf, "};\n");
6ae327f8 AC	490	TextIO.closeOut outf
6ae327f8 AC	491	end
6ae327f8 AC	492	in
6ae327f8 AC	493	case kind of
e0b0abd2 AC	494	NoDns => masterNode := NONE
e0b0abd2 AC	495	\| UseDns dns =>
2ed6d0e5 AC	496	let
	497	val masterIp =
	498	case #master dns of
	499	InternalMaster node => valOf (SM.find (nodeMap, node))
	500	\| ExternalMaster ip => ip
	501	in
	502	app (saveSoa ("slave", #soa dns)) (#slaves dns);
	503	app (saveNamed ("slave", #soa dns, masterIp)) (#slaves dns);
	504	case #master dns of
	505	InternalMaster node =>
	506	(masterNode := SOME node;
	507	saveSoa ("master", #soa dns) node;
	508	saveNamed ("master", #soa dns, masterIp) node)
	509	\| _ => masterNode := NONE;
	510	!befores dom
	511	end
6ae327f8	512	end,
e0b0abd2 AC	513	fn () => !afters (!current))
	514
	515	val () = Env.registerPre (fn () => (ignore (Slave.shellF ([Config.rm, " -rf ", Config.tmpDir, ""],
	516	fn cl => "Temp file cleanup failed: " ^ cl));
	517	OS.FileSys.mkDir Config.tmpDir;
	518	app (fn node => OS.FileSys.mkDir
	519	(OS.Path.joinDirFile {dir = Config.tmpDir,
	520	file = node}))
2ed6d0e5	521	nodes;
e0b0abd2 AC	522	app (fn node => OS.FileSys.mkDir
	523	(OS.Path.joinDirFile {dir = Config.resultRoot,
	524	file = node})
	525	handle OS.SysErr _ => ())
2ed6d0e5	526	nodes))
e0b0abd2 AC	527
	528	val () = Env.registerPost (fn () =>
	529	let
	530	val diffs = findAllDiffs ()
6ae327f8	531
e0b0abd2 AC	532	val diffs = map (fn (site, dom, dir, Add' {src, dst}) =>
	533	(Slave.shellF ([Config.cp, " ", src, " ", dst],
	534	fn cl => "Copy failed: " ^ cl);
	535	(site,
6ae327f8 AC	536	{action = Slave.Add,
	537	domain = dom,
	538	dir = dir,
e0b0abd2 AC	539	file = dst}))
	540	\| (site, dom, dir, Delete' dst) =>
	541	(OS.FileSys.remove dst
	542	handle OS.SysErr _ =>
	543	ErrorMsg.error NONE ("Delete failed for " ^ dst);
	544	(site,
6ae327f8 AC	545	{action = Slave.Delete,
	546	domain = dom,
	547	dir = dir,
e0b0abd2 AC	548	file = dst}))
	549	\| (site, dom, dir, Modify' {src, dst}) =>
	550	(Slave.shellF ([Config.cp, " ", src, " ", dst],
	551	fn cl => "Copy failed: " ^ cl);
	552	(site,
6ae327f8 AC	553	{action = Slave.Modify,
	554	domain = dom,
	555	dir = dir,
e0b0abd2 AC	556	file = dst}))) diffs
	557	in
	558	if !ErrorMsg.anyErrors then
	559	()
36e42cb8 AC	560	else let
	561	val changed = foldl (fn ((site, file), changed) =>
	562	let
	563	val ls = case SM.find (changed, site) of
	564	NONE => []
	565	\| SOME ls => ls
	566	in
	567	SM.insert (changed, site, file :: ls)
	568	end) SM.empty diffs
	569
	570	fun handleSite (site, files) =
	571	let
	572
	573	in
	574	print ("New configuration for node " ^ site ^ "\n");
	575	if site = Config.defaultNode then
	576	Slave.handleChanges files
	577	else let
	578	val bio = OpenSSL.connect (valOf (!ssl_context),
	579	nodeIp site
	580	^ ":"
	581	^ Int.toString Config.slavePort)
	582	in
	583	app (fn file => Msg.send (bio, MsgFile file)) files;
	584	Msg.send (bio, MsgDoFiles);
	585	case Msg.recv bio of
	586	NONE => print "Slave closed connection unexpectedly\n"
	587	\| SOME m =>
	588	case m of
	589	MsgOk => print ("Slave " ^ site ^ " finished\n")
	590	\| MsgError s => print ("Slave " ^ site
	591	^ " returned error: " ^
	592	s ^ "\n")
	593	\| _ => print ("Slave " ^ site
	594	^ " returned unexpected command\n");
	595	OpenSSL.close bio
	596	end
	597	end
	598	in
	599	SM.appi handleSite changed
	600	end;
e0b0abd2	601	ignore (Slave.shellF ([Config.rm, " -rf ", Config.tmpDir, ""],
559e89e9	602	fn cl => "Temp file cleanup failed: " ^ cl))
e0b0abd2	603	end)
6ae327f8	604
a3698041	605	end