src/main.sml

   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 (* Main interface *)
  20
  21 structure Main :> MAIN = struct
  22
  23 open Ast MsgTypes Print
  24
  25 structure SM = StringMap
  26
  27 fun init () = Acl.read Config.aclFile
  28
  29 fun check' G fname =
  30     let
  31         val prog = Parse.parse fname
  32     in
  33         if !ErrorMsg.anyErrors then
  34             G
  35         else
  36             Tycheck.checkFile G (Defaults.tInit ()) prog
  37     end
  38
  39 fun basis () =
  40     let
  41         val dir = Posix.FileSys.opendir Config.libRoot
  42
  43         fun loop files =
  44             case Posix.FileSys.readdir dir of
  45                 NONE => (Posix.FileSys.closedir dir;
  46                          files)
  47               | SOME fname =>
  48                 if String.isSuffix ".dtl" fname then
  49                     loop (OS.Path.joinDirFile {dir = Config.libRoot,
  50                                                file = fname}
  51                           :: files)
  52                 else
  53                     loop files
  54
  55         val files = loop []
  56         val (_, files) = Order.order NONE files
  57     in
  58         if !ErrorMsg.anyErrors then
  59             Env.empty
  60         else
  61             (Tycheck.allowExterns ();
  62              foldl (fn (fname, G) => check' G fname) Env.empty files
  63              before Tycheck.disallowExterns ())
  64     end
  65
  66 fun check fname =
  67     let
  68         val _ = ErrorMsg.reset ()
  69         val _ = Env.preTycheck ()
  70
  71         val b = basis ()
  72     in
  73         if !ErrorMsg.anyErrors then
  74             raise ErrorMsg.Error
  75         else
  76             let
  77                 val _ = Tycheck.disallowExterns ()
  78                 val _ = ErrorMsg.reset ()
  79                 val prog = Parse.parse fname
  80             in
  81                 if !ErrorMsg.anyErrors then
  82                     raise ErrorMsg.Error
  83                 else
  84                     let
  85                         val G' = Tycheck.checkFile b (Defaults.tInit ()) prog
  86                     in
  87                         if !ErrorMsg.anyErrors then
  88                             raise ErrorMsg.Error
  89                         else
  90                             (G', #3 prog)
  91                     end
  92             end
  93     end
  94
  95 val notTmp = CharVector.all (fn ch => Char.isAlphaNum ch orelse ch = #"." orelse ch = #"_" orelse ch = #"-")
  96
  97 fun checkDir dname =
  98     let
  99         val b = basis ()
 100
 101         val dir = Posix.FileSys.opendir dname
 102
 103         fun loop files =
 104             case Posix.FileSys.readdir dir of
 105                 NONE => (Posix.FileSys.closedir dir;
 106                          files)
 107               | SOME fname =>
 108                 if notTmp fname then
 109                     loop (OS.Path.joinDirFile {dir = dname,
 110                                                file = fname}
 111                           :: files)
 112                 else
 113                     loop files
 114
 115         val files = loop []
 116         val (_, files) = Order.order (SOME b) files
 117     in
 118         if !ErrorMsg.anyErrors then
 119             raise ErrorMsg.Error
 120         else
 121             (foldl (fn (fname, G) => check' G fname) b files;
 122              if !ErrorMsg.anyErrors then
 123                  raise ErrorMsg.Error
 124              else
 125                  ())
 126     end
 127
 128 fun reduce fname =
 129     let
 130         val (G, body) = check fname
 131     in
 132         if !ErrorMsg.anyErrors then
 133             NONE
 134         else
 135             case body of
 136                 SOME body =>
 137                 let
 138                     val body' = Reduce.reduceExp G body
 139                 in
 140                     (*printd (PD.hovBox (PD.PPS.Rel 0,
 141                                          [PD.string "Result:",
 142                                           PD.space 1,
 143                                           p_exp body']))*)
 144                     SOME body'
 145                 end
 146               | _ => NONE
 147     end
 148
 149 fun eval fname =
 150     case reduce fname of
 151         (SOME body') =>
 152         if !ErrorMsg.anyErrors then
 153             raise ErrorMsg.Error
 154         else
 155             Eval.exec (Defaults.eInit ()) body'
 156       | NONE => raise ErrorMsg.Error
 157
 158 fun eval' fname =
 159     case reduce fname of
 160         (SOME body') =>
 161         if !ErrorMsg.anyErrors then
 162             raise ErrorMsg.Error
 163         else
 164             ignore (Eval.exec' (Defaults.eInit ()) body')
 165       | NONE => raise ErrorMsg.Error
 166
 167 val dispatcher =
 168     Config.dispatcher ^ ":" ^ Int.toString Config.dispatcherPort
 169
 170 val self =
 171     "localhost:" ^ Int.toString Config.slavePort
 172
 173 fun requestContext f =
 174     let
 175         val uid = Posix.ProcEnv.getuid ()
 176         val user = Posix.SysDB.Passwd.name (Posix.SysDB.getpwuid uid)
 177
 178         val () = Acl.read Config.aclFile
 179         val () = Domain.setUser user
 180
 181         val () = f ()
 182
 183         val context = OpenSSL.context (Config.certDir ^ "/" ^ user ^ ".pem",
 184                                        Config.keyDir ^ "/" ^ user ^ "/key.pem",
 185                                        Config.trustStore)
 186     in
 187         (user, context)
 188     end
 189
 190 fun requestBio f =
 191     let
 192         val (user, context) = requestContext f
 193     in
 194         (user, OpenSSL.connect (context, dispatcher))
 195     end
 196
 197 fun requestSlaveBio () =
 198     let
 199         val (user, context) = requestContext (fn () => ())
 200     in
 201         (user, OpenSSL.connect (context, self))
 202     end
 203
 204 fun request fname =
 205     let
 206         val (user, bio) = requestBio (fn () => ignore (check fname))
 207
 208         val inf = TextIO.openIn fname
 209
 210         fun loop lines =
 211             case TextIO.inputLine inf of
 212                 NONE => String.concat (List.rev lines)
 213               | SOME line => loop (line :: lines)
 214
 215         val code = loop []
 216     in
 217         TextIO.closeIn inf;
 218         Msg.send (bio, MsgConfig code);
 219         case Msg.recv bio of
 220             NONE => print "Server closed connection unexpectedly.\n"
 221           | SOME m =>
 222             case m of
 223                 MsgOk => print "Configuration succeeded.\n"
 224               | MsgError s => print ("Configuration failed: " ^ s ^ "\n")
 225               | _ => print "Unexpected server reply.\n";
 226         OpenSSL.close bio
 227     end
 228     handle ErrorMsg.Error => ()
 229
 230 fun requestDir dname =
 231     let
 232         val _ = ErrorMsg.reset ()
 233
 234         val (user, bio) = requestBio (fn () => checkDir dname)
 235
 236         val b = basis ()
 237
 238         val dir = Posix.FileSys.opendir dname
 239
 240         fun loop files =
 241             case Posix.FileSys.readdir dir of
 242                 NONE => (Posix.FileSys.closedir dir;
 243                          files)
 244               | SOME fname =>
 245                 if notTmp fname then
 246                     loop (OS.Path.joinDirFile {dir = dname,
 247                                                file = fname}
 248                           :: files)
 249                 else
 250                     loop files
 251
 252         val files = loop []
 253         val (_, files) = Order.order (SOME b) files
 254
 255         val _ = if !ErrorMsg.anyErrors then
 256                     raise ErrorMsg.Error
 257                 else
 258                     ()
 259
 260         val codes = map (fn fname =>
 261                             let
 262                                 val inf = TextIO.openIn fname
 263
 264                                 fun loop lines =
 265                                     case TextIO.inputLine inf of
 266                                         NONE => String.concat (rev lines)
 267                                       | SOME line => loop (line :: lines)
 268                             in
 269                                 loop []
 270                                 before TextIO.closeIn inf
 271                             end) files
 272     in
 273         if !ErrorMsg.anyErrors then
 274             ()
 275         else
 276             (Msg.send (bio, MsgMultiConfig codes);
 277              case Msg.recv bio of
 278                  NONE => print "Server closed connection unexpectedly.\n"
 279                | SOME m =>
 280                  case m of
 281                      MsgOk => print "Configuration succeeded.\n"
 282                    | MsgError s => print ("Configuration failed: " ^ s ^ "\n")
 283                    | _ => print "Unexpected server reply.\n";
 284              OpenSSL.close bio)
 285     end
 286     handle ErrorMsg.Error => ()
 287
 288 fun requestPing () =
 289     let
 290         val (_, bio) = requestBio (fn () => ())
 291     in
 292         OpenSSL.close bio;
 293         OS.Process.success
 294     end
 295     handle _ => OS.Process.failure
 296
 297 fun requestShutdown () =
 298     let
 299         val (_, bio) = requestBio (fn () => ())
 300     in
 301         Msg.send (bio, MsgShutdown);
 302         case Msg.recv bio of
 303             NONE => print "Server closed connection unexpectedly.\n"
 304           | SOME m =>
 305             case m of
 306                 MsgOk => print "Shutdown begun.\n"
 307               | MsgError s => print ("Shutdown failed: " ^ s ^ "\n")
 308               | _ => print "Unexpected server reply.\n";
 309         OpenSSL.close bio
 310     end
 311
 312 fun requestSlavePing () =
 313     let
 314         val (_, bio) = requestSlaveBio ()
 315     in
 316         OpenSSL.close bio;
 317         OS.Process.success
 318     end
 319     handle _ => OS.Process.failure
 320
 321 fun requestSlaveShutdown () =
 322     let
 323         val (_, bio) = requestSlaveBio ()
 324     in
 325         Msg.send (bio, MsgShutdown);
 326         case Msg.recv bio of
 327             NONE => print "Server closed connection unexpectedly.\n"
 328           | SOME m =>
 329             case m of
 330                 MsgOk => print "Shutdown begun.\n"
 331               | MsgError s => print ("Shutdown failed: " ^ s ^ "\n")
 332               | _ => print "Unexpected server reply.\n";
 333         OpenSSL.close bio
 334     end
 335
 336 fun requestGrant acl =
 337     let
 338         val (user, bio) = requestBio (fn () => ())
 339     in
 340         Msg.send (bio, MsgGrant acl);
 341         case Msg.recv bio of
 342             NONE => print "Server closed connection unexpectedly.\n"
 343           | SOME m =>
 344             case m of
 345                 MsgOk => print "Grant succeeded.\n"
 346               | MsgError s => print ("Grant failed: " ^ s ^ "\n")
 347               | _ => print "Unexpected server reply.\n";
 348         OpenSSL.close bio
 349     end
 350
 351 fun requestRevoke acl =
 352     let
 353         val (user, bio) = requestBio (fn () => ())
 354     in
 355         Msg.send (bio, MsgRevoke acl);
 356         case Msg.recv bio of
 357             NONE => print "Server closed connection unexpectedly.\n"
 358           | SOME m =>
 359             case m of
 360                 MsgOk => print "Revoke succeeded.\n"
 361               | MsgError s => print ("Revoke failed: " ^ s ^ "\n")
 362               | _ => print "Unexpected server reply.\n";
 363         OpenSSL.close bio
 364     end
 365
 366 fun requestListPerms user =
 367     let
 368         val (_, bio) = requestBio (fn () => ())
 369     in
 370         Msg.send (bio, MsgListPerms user);
 371         (case Msg.recv bio of
 372              NONE => (print "Server closed connection unexpectedly.\n";
 373                       NONE)
 374            | SOME m =>
 375              case m of
 376                  MsgPerms perms => SOME perms
 377                | MsgError s => (print ("Listing failed: " ^ s ^ "\n");
 378                                 NONE)
 379                | _ => (print "Unexpected server reply.\n";
 380                        NONE))
 381         before OpenSSL.close bio
 382     end
 383
 384 fun requestWhoHas perm =
 385     let
 386         val (_, bio) = requestBio (fn () => ())
 387     in
 388         Msg.send (bio, MsgWhoHas perm);
 389         (case Msg.recv bio of
 390              NONE => (print "Server closed connection unexpectedly.\n";
 391                       NONE)
 392            | SOME m =>
 393              case m of
 394                  MsgWhoHasResponse users => SOME users
 395                | MsgError s => (print ("whohas failed: " ^ s ^ "\n");
 396                                 NONE)
 397                | _ => (print "Unexpected server reply.\n";
 398                        NONE))
 399         before OpenSSL.close bio
 400     end
 401
 402 fun requestRegen () =
 403     let
 404         val (_, bio) = requestBio (fn () => ())
 405     in
 406         Msg.send (bio, MsgRegenerate);
 407         case Msg.recv bio of
 408             NONE => print "Server closed connection unexpectedly.\n"
 409           | SOME m =>
 410             case m of
 411                 MsgOk => print "Regeneration succeeded.\n"
 412               | MsgError s => print ("Regeneration failed: " ^ s ^ "\n")
 413               | _ => print "Unexpected server reply.\n";
 414         OpenSSL.close bio
 415     end
 416
 417 fun requestRmdom dom =
 418     let
 419         val (_, bio) = requestBio (fn () => ())
 420     in
 421         Msg.send (bio, MsgRmdom dom);
 422         case Msg.recv bio of
 423             NONE => print "Server closed connection unexpectedly.\n"
 424           | SOME m =>
 425             case m of
 426                 MsgOk => print "Removal succeeded.\n"
 427               | MsgError s => print ("Removal failed: " ^ s ^ "\n")
 428               | _ => print "Unexpected server reply.\n";
 429         OpenSSL.close bio
 430     end
 431
 432 fun requestRmuser user =
 433     let
 434         val (_, bio) = requestBio (fn () => ())
 435     in
 436         Msg.send (bio, MsgRmuser user);
 437         case Msg.recv bio of
 438             NONE => print "Server closed connection unexpectedly.\n"
 439           | SOME m =>
 440             case m of
 441                 MsgOk => print "Removal succeeded.\n"
 442               | MsgError s => print ("Removal failed: " ^ s ^ "\n")
 443               | _ => print "Unexpected server reply.\n";
 444         OpenSSL.close bio
 445     end
 446
 447 fun requestDbUser dbtype =
 448     let
 449         val (_, bio) = requestBio (fn () => ())
 450     in
 451         Msg.send (bio, MsgCreateDbUser dbtype);
 452         case Msg.recv bio of
 453             NONE => print "Server closed connection unexpectedly.\n"
 454           | SOME m =>
 455             case m of
 456                 MsgOk => print "Your user has been created.\n"
 457               | MsgError s => print ("Creation failed: " ^ s ^ "\n")
 458               | _ => print "Unexpected server reply.\n";
 459         OpenSSL.close bio
 460     end
 461
 462 fun requestDbPasswd rc =
 463     let
 464         val (_, bio) = requestBio (fn () => ())
 465     in
 466         Msg.send (bio, MsgDbPasswd rc);
 467         case Msg.recv bio of
 468             NONE => print "Server closed connection unexpectedly.\n"
 469           | SOME m =>
 470             case m of
 471                 MsgOk => print "Your password has been changed.\n"
 472               | MsgError s => print ("Password set failed: " ^ s ^ "\n")
 473               | _ => print "Unexpected server reply.\n";
 474         OpenSSL.close bio
 475     end
 476
 477 fun requestDbTable p =
 478     let
 479         val (user, bio) = requestBio (fn () => ())
 480     in
 481         Msg.send (bio, MsgCreateDbTable p);
 482         case Msg.recv bio of
 483             NONE => print "Server closed connection unexpectedly.\n"
 484           | SOME m =>
 485             case m of
 486                 MsgOk => print ("Your database " ^ user ^ "_" ^ #dbname p ^ " has been created.\n")
 487               | MsgError s => print ("Creation failed: " ^ s ^ "\n")
 488               | _ => print "Unexpected server reply.\n";
 489         OpenSSL.close bio
 490     end
 491
 492 fun requestListMailboxes domain =
 493     let
 494         val (_, bio) = requestBio (fn () => ())
 495     in
 496         Msg.send (bio, MsgListMailboxes domain);
 497         (case Msg.recv bio of
 498              NONE => Vmail.Error "Server closed connection unexpectedly."
 499            | SOME m =>
 500              case m of
 501                  MsgMailboxes users => (Msg.send (bio, MsgOk);
 502                                         Vmail.Listing users)
 503                | MsgError s => Vmail.Error ("Creation failed: " ^ s)
 504                | _ => Vmail.Error "Unexpected server reply.")
 505         before OpenSSL.close bio
 506     end
 507
 508 fun requestNewMailbox p =
 509     let
 510         val (_, bio) = requestBio (fn () => ())
 511     in
 512         Msg.send (bio, MsgNewMailbox p);
 513         case Msg.recv bio of
 514             NONE => print "Server closed connection unexpectedly.\n"
 515           | SOME m =>
 516             case m of
 517                 MsgOk => print ("A mapping for " ^ #user p ^ "@" ^ #domain p ^ " has been created.\n")
 518               | MsgError s => print ("Creation failed: " ^ s ^ "\n")
 519               | _ => print "Unexpected server reply.\n";
 520         OpenSSL.close bio
 521     end
 522
 523 fun requestPasswdMailbox p =
 524     let
 525         val (_, bio) = requestBio (fn () => ())
 526     in
 527         Msg.send (bio, MsgPasswdMailbox p);
 528         case Msg.recv bio of
 529             NONE => print "Server closed connection unexpectedly.\n"
 530           | SOME m =>
 531             case m of
 532                 MsgOk => print ("The password for " ^ #user p ^ "@" ^ #domain p ^ " has been changed.\n")
 533               | MsgError s => print ("Set failed: " ^ s ^ "\n")
 534               | _ => print "Unexpected server reply.\n";
 535         OpenSSL.close bio
 536     end
 537
 538 fun requestRmMailbox p =
 539     let
 540         val (_, bio) = requestBio (fn () => ())
 541     in
 542         Msg.send (bio, MsgRmMailbox p);
 543         case Msg.recv bio of
 544             NONE => print "Server closed connection unexpectedly.\n"
 545           | SOME m =>
 546             case m of
 547                 MsgOk => print ("The mapping for mailbox " ^ #user p ^ "@" ^ #domain p ^ " has been deleted.\n")
 548               | MsgError s => print ("Remove failed: " ^ s ^ "\n")
 549               | _ => print "Unexpected server reply.\n";
 550         OpenSSL.close bio
 551     end
 552
 553 fun requestSaQuery addr =
 554     let
 555         val (_, bio) = requestBio (fn () => ())
 556     in
 557         Msg.send (bio, MsgSaQuery addr);
 558         (case Msg.recv bio of
 559              NONE => print "Server closed connection unexpectedly.\n"
 560            | SOME m =>
 561              case m of
 562                  MsgSaStatus b => (print ("SpamAssassin filtering for " ^ addr ^ " is "
 563                                           ^ (if b then "ON" else "OFF") ^ ".\n");
 564                                    Msg.send (bio, MsgOk))
 565                | MsgError s => print ("Query failed: " ^ s ^ "\n")
 566                | _ => print "Unexpected server reply.\n")
 567         before OpenSSL.close bio
 568     end
 569
 570 fun requestSaSet p =
 571     let
 572         val (_, bio) = requestBio (fn () => ())
 573     in
 574         Msg.send (bio, MsgSaSet p);
 575         case Msg.recv bio of
 576             NONE => print "Server closed connection unexpectedly.\n"
 577           | SOME m =>
 578             case m of
 579                 MsgOk => print ("SpamAssassin filtering for " ^ #1 p ^ " is now "
 580                                 ^ (if #2 p then "ON" else "OFF") ^ ".\n")
 581               | MsgError s => print ("Set failed: " ^ s ^ "\n")
 582               | _ => print "Unexpected server reply.\n";
 583         OpenSSL.close bio
 584     end
 585
 586 fun requestSmtpLog domain =
 587     let
 588         val (_, bio) = requestBio (fn () => ())
 589
 590         val _ = Msg.send (bio, MsgSmtpLogReq domain)
 591
 592         fun loop () =
 593             case Msg.recv bio of
 594                 NONE => print "Server closed connection unexpectedly.\n"
 595               | SOME m =>
 596                 case m of
 597                     MsgOk => ()
 598                   | MsgSmtpLogRes line => (print line;
 599                                            loop ())
 600                   | MsgError s => print ("Log search failed: " ^ s ^ "\n")
 601                   | _ => print "Unexpected server reply.\n"
 602     in
 603         loop ();
 604         OpenSSL.close bio
 605     end
 606
 607 fun regenerate context =
 608     let
 609         val b = basis ()
 610         val () = Tycheck.disallowExterns ()
 611
 612         val () = Domain.resetGlobal ()
 613
 614         fun contactNode (node, ip) =
 615             if node = Config.defaultNode then
 616                 Domain.resetLocal ()
 617             else let
 618                     val bio = OpenSSL.connect (context,
 619                                                ip
 620                                                ^ ":"
 621                                                ^ Int.toString Config.slavePort)
 622                 in
 623                     Msg.send (bio, MsgRegenerate);
 624                     case Msg.recv bio of
 625                         NONE => print "Slave closed connection unexpectedly\n"
 626                       | SOME m =>
 627                         case m of
 628                             MsgOk => print ("Slave " ^ node ^ " pre-regeneration finished\n")
 629                           | MsgError s => print ("Slave " ^ node
 630                                                  ^ " returned error: " ^
 631                                                  s ^ "\n")
 632                           | _ => print ("Slave " ^ node
 633                                         ^ " returned unexpected command\n");
 634                     OpenSSL.close bio
 635                 end
 636
 637         fun doUser user =
 638             let
 639                 val _ = Domain.setUser user
 640                 val _ = ErrorMsg.reset ()
 641
 642                 val dname = Config.domtoolDir user
 643
 644                 val dir = Posix.FileSys.opendir dname
 645
 646                 fun loop files =
 647                     case Posix.FileSys.readdir dir of
 648                         NONE => (Posix.FileSys.closedir dir;
 649                                  files)
 650                       | SOME fname =>
 651                         if notTmp fname then
 652                             loop (OS.Path.joinDirFile {dir = dname,
 653                                                        file = fname}
 654                                   :: files)
 655                         else
 656                             loop files
 657
 658                 val files = loop []
 659                 val (_, files) = Order.order (SOME b) files
 660             in
 661                 if !ErrorMsg.anyErrors then
 662                     print ("User " ^ user ^ "'s configuration has errors!\n")
 663                 else
 664                     app eval' files
 665             end
 666                 handle IO.Io _ => ()
 667                      | OS.SysErr (s, _) => print ("System error processing user " ^ user ^ ": " ^ s ^ "\n")
 668                      | ErrorMsg.Error => print ("User " ^ user ^ " had a compilation error.\n")
 669     in
 670         app contactNode Config.nodeIps;
 671         Env.pre ();
 672         app doUser (Acl.users ());
 673         Env.post ()
 674     end
 675
 676 fun rmuser user =
 677     let
 678         val doms = Acl.class {user = user, class = "domain"}
 679         val doms = List.filter (fn dom =>
 680                                    case Acl.whoHas {class = "domain", value = dom} of
 681                                        [_] => true
 682                                      | _ => false) (StringSet.listItems doms)
 683     in
 684         Acl.rmuser user;
 685         Domain.rmdom doms
 686     end
 687
 688 fun now () = Date.toString (Date.fromTimeUniv (Time.now ()))
 689
 690 fun service () =
 691     let
 692         val () = Acl.read Config.aclFile
 693
 694         val context = OpenSSL.context (Config.serverCert,
 695                                        Config.serverKey,
 696                                        Config.trustStore)
 697         val _ = Domain.set_context context
 698
 699         val sock = OpenSSL.listen (context, Config.dispatcherPort)
 700
 701         fun loop () =
 702             case OpenSSL.accept sock of
 703                 NONE => ()
 704               | SOME bio =>
 705                 let
 706                     val user = OpenSSL.peerCN bio
 707                     val () = print ("\nConnection from " ^ user ^ " at " ^ now () ^ "\n")
 708                     val () = Domain.setUser user
 709
 710                     fun doIt f cleanup =
 711                         ((case f () of
 712                              (msgLocal, SOME msgRemote) =>
 713                              (print msgLocal;
 714                               print "\n";
 715                               Msg.send (bio, MsgError msgRemote))
 716                            | (msgLocal, NONE) =>
 717                              (print msgLocal;
 718                               print "\n";
 719                               Msg.send (bio, MsgOk)))
 720                          handle OpenSSL.OpenSSL _ =>
 721                                 print "OpenSSL error\n"
 722                               | OS.SysErr (s, _) =>
 723                                 (print "System error: ";
 724                                  print s;
 725                                  print "\n";
 726                                  Msg.send (bio, MsgError ("System error: " ^ s))
 727                                  handle OpenSSL.OpenSSL _ => ())
 728                               | Fail s =>
 729                                 (print "Failure: ";
 730                                  print s;
 731                                  print "\n";
 732                                  Msg.send (bio, MsgError ("Failure: " ^ s))
 733                                  handle OpenSSL.OpenSSL _ => ())
 734                               | ErrorMsg.Error =>
 735                                 (print "Compilation error\n";
 736                                  Msg.send (bio, MsgError "Error during configuration evaluation")
 737                                  handle OpenSSL.OpenSSL _ => ());
 738                          (cleanup ();
 739                           ignore (OpenSSL.readChar bio);
 740                           OpenSSL.close bio)
 741                          handle OpenSSL.OpenSSL _ => ();
 742                          loop ())
 743
 744                     fun doConfig codes =
 745                         let
 746                             val _ = print "Configuration:\n"
 747                             val _ = app (fn s => (print s; print "\n")) codes
 748                             val _ = print "\n"
 749
 750                             val outname = OS.FileSys.tmpName ()
 751
 752                             fun doOne code =
 753                                 let
 754                                     val outf = TextIO.openOut outname
 755                                 in
 756                                     TextIO.output (outf, code);
 757                                     TextIO.closeOut outf;
 758                                     eval' outname
 759                                 end
 760                         in
 761                             doIt (fn () => (Env.pre ();
 762                                             app doOne codes;
 763                                             Env.post ();
 764                                             Msg.send (bio, MsgOk);
 765                                             ("Configuration complete.", NONE)))
 766                                  (fn () => OS.FileSys.remove outname)
 767                         end
 768
 769                     fun checkAddr s =
 770                         case String.fields (fn ch => ch = #"@") s of
 771                             [user'] =>
 772                             if user = user' then
 773                                 SOME (SetSA.User s)
 774                             else
 775                                 NONE
 776                           | [user', domain] =>
 777                             if Domain.validEmailUser user' andalso Domain.yourDomain domain then
 778                                 SOME (SetSA.Email s)
 779                             else
 780                                 NONE
 781                           | _ => NONE
 782
 783                     fun cmdLoop () =
 784                         case Msg.recv bio of
 785                             NONE => (OpenSSL.close bio
 786                                      handle OpenSSL.OpenSSL _ => ();
 787                                      loop ())
 788                           | SOME m =>
 789                             case m of
 790                                 MsgConfig code => doConfig [code]
 791                               | MsgMultiConfig codes => doConfig codes
 792
 793                               | MsgShutdown =>
 794                                 if Acl.query {user = user, class = "priv", value = "all"}
 795                                    orelse Acl.query {user = user, class = "priv", value = "shutdown"} then
 796                                     print ("Domtool dispatcher shutting down at " ^ now () ^ "\n\n")
 797                                 else
 798                                     (print "Unauthorized shutdown command!\n";
 799                                      OpenSSL.close bio
 800                                      handle OpenSSL.OpenSSL _ => ();
 801                                      loop ())
 802
 803                               | MsgGrant acl =>
 804                                 doIt (fn () =>
 805                                          if Acl.query {user = user, class = "priv", value = "all"} then
 806                                              (Acl.grant acl;
 807                                               Acl.write Config.aclFile;
 808                                               ("Granted permission " ^ #value acl ^ " to " ^ #user acl ^ " in " ^ #class acl ^ ".",
 809                                                NONE))
 810                                          else
 811                                              ("Unauthorized user asked to grant a permission!",
 812                                               SOME "Not authorized to grant privileges"))
 813                                      (fn () => ())
 814
 815                               | MsgRevoke acl =>
 816                                 doIt (fn () =>
 817                                          if Acl.query {user = user, class = "priv", value = "all"} then
 818                                              (Acl.revoke acl;
 819                                               Acl.write Config.aclFile;
 820                                               ("Revoked permission " ^ #value acl ^ " from " ^ #user acl ^ " in " ^ #class acl ^ ".",
 821                                                NONE))
 822                                          else
 823                                              ("Unauthorized user asked to revoke a permission!",
 824                                               SOME "Not authorized to revoke privileges"))
 825                                      (fn () => ())
 826
 827                               | MsgListPerms user =>
 828                                 doIt (fn () =>
 829                                          (Msg.send (bio, MsgPerms (Acl.queryAll user));
 830                                           ("Sent permission list for user " ^ user ^ ".",
 831                                            NONE)))
 832                                      (fn () => ())
 833
 834                               | MsgWhoHas perm =>
 835                                 doIt (fn () =>
 836                                          (Msg.send (bio, MsgWhoHasResponse (Acl.whoHas perm));
 837                                           ("Sent whohas response for " ^ #class perm ^ " / " ^ #value perm ^ ".",
 838                                            NONE)))
 839                                      (fn () => ())
 840
 841                               | MsgRmdom doms =>
 842                                 doIt (fn () =>
 843                                          if Acl.query {user = user, class = "priv", value = "all"}
 844                                             orelse List.all (fn dom => Acl.query {user = user, class = "domain", value = dom}) doms then
 845                                              (Domain.rmdom doms;
 846                                               app (fn dom =>
 847                                                       Acl.revokeFromAll {class = "domain", value = dom}) doms;
 848                                               Acl.write Config.aclFile;
 849                                               ("Removed domains" ^ foldl (fn (d, s) => s ^ " " ^ d) "" doms ^ ".",
 850                                                NONE))
 851                                          else
 852                                              ("Unauthorized user asked to remove a domain!",
 853                                               SOME "Not authorized to remove that domain"))
 854                                      (fn () => ())
 855
 856                               | MsgRegenerate =>
 857                                 doIt (fn () =>
 858                                          if Acl.query {user = user, class = "priv", value = "regen"}
 859                                             orelse Acl.query {user = user, class = "priv", value = "all"} then
 860                                              (regenerate context;
 861                                               ("Regenerated all configuration.",
 862                                                NONE))
 863                                          else
 864                                              ("Unauthorized user asked to regenerate!",
 865                                               SOME "Not authorized to regenerate"))
 866                                      (fn () => ())
 867
 868                               | MsgRmuser user' =>
 869                                 doIt (fn () =>
 870                                          if Acl.query {user = user, class = "priv", value = "all"} then
 871                                              (rmuser user';
 872                                               Acl.write Config.aclFile;
 873                                               ("Removed user " ^ user' ^ ".",
 874                                                NONE))
 875                                          else
 876                                              ("Unauthorized user asked to remove a user!",
 877                                               SOME "Not authorized to remove users"))
 878                                      (fn () => ())
 879
 880                               | MsgCreateDbUser {dbtype, passwd} =>
 881                                 doIt (fn () =>
 882                                          case Dbms.lookup dbtype of
 883                                              NONE => ("Database user creation request with unknown datatype type " ^ dbtype,
 884                                                       SOME ("Unknown database type " ^ dbtype))
 885                                            | SOME handler =>
 886                                              case #adduser handler {user = user, passwd = passwd} of
 887                                                  NONE => ("Added " ^ dbtype ^ " user " ^ user ^ ".",
 888                                                           NONE)
 889                                                | SOME msg =>
 890                                                  ("Error adding a " ^ dbtype ^ " user " ^ user ^ ": " ^ msg,
 891                                                   SOME ("Error adding user: " ^ msg)))
 892                                      (fn () => ())
 893
 894                               | MsgDbPasswd {dbtype, passwd} =>
 895                                 doIt (fn () =>
 896                                          case Dbms.lookup dbtype of
 897                                              NONE => ("Database passwd request with unknown datatype type " ^ dbtype,
 898                                                       SOME ("Unknown database type " ^ dbtype))
 899                                            | SOME handler =>
 900                                              case #passwd handler {user = user, passwd = passwd} of
 901                                                  NONE => ("Changed " ^ dbtype ^ " password of user " ^ user ^ ".",
 902                                                           NONE)
 903                                                | SOME msg =>
 904                                                  ("Error setting " ^ dbtype ^ " password of user " ^ user ^ ": " ^ msg,
 905                                                   SOME ("Error adding user: " ^ msg)))
 906                                      (fn () => ())
 907
 908                               | MsgCreateDbTable {dbtype, dbname} =>
 909                                 doIt (fn () =>
 910                                          if Dbms.validDbname dbname then
 911                                              case Dbms.lookup dbtype of
 912                                                  NONE => ("Database creation request with unknown datatype type " ^ dbtype,
 913                                                           SOME ("Unknown database type " ^ dbtype))
 914                                                | SOME handler =>
 915                                                  case #createdb handler {user = user, dbname = dbname} of
 916                                                      NONE => ("Created database " ^ user ^ "_" ^ dbname ^ ".",
 917                                                               NONE)
 918                                                    | SOME msg => ("Error creating database " ^ user ^ "_" ^ dbname ^ ": " ^ msg,
 919                                                                   SOME ("Error creating database: " ^ msg))
 920                                          else
 921                                              ("Invalid database name " ^ user ^ "_" ^ dbname,
 922                                               SOME ("Invalid database name " ^ dbname)))
 923                                      (fn () => ())
 924
 925                               | MsgListMailboxes domain =>
 926                                 doIt (fn () =>
 927                                          if not (Domain.yourDomain domain) then
 928                                              ("User wasn't authorized to list mailboxes for " ^ domain,
 929                                               SOME "You're not authorized to configure that domain.")
 930                                          else
 931                                              case Vmail.list domain of
 932                                                  Vmail.Listing users => (Msg.send (bio, MsgMailboxes users);
 933                                                                          ("Sent mailbox list for " ^ domain,
 934                                                                           NONE))
 935                                                | Vmail.Error msg => ("Error listing mailboxes for " ^ domain ^ ": " ^ msg,
 936                                                                      SOME msg))
 937                                      (fn () => ())
 938
 939                               | MsgNewMailbox {domain, user = emailUser, passwd, mailbox} =>
 940                                 doIt (fn () =>
 941                                          if not (Domain.yourDomain domain) then
 942                                              ("User wasn't authorized to add a mailbox to " ^ domain,
 943                                               SOME "You're not authorized to configure that domain.")
 944                                          else if not (Domain.validEmailUser emailUser) then
 945                                              ("Invalid e-mail username " ^ emailUser,
 946                                               SOME "Invalid e-mail username")
 947                                          else if not (CharVector.all Char.isGraph passwd) then
 948                                              ("Invalid password",
 949                                               SOME "Invalid password; may only contain printable, non-space characters")
 950                                          else if not (Domain.yourPath mailbox) then
 951                                              ("User wasn't authorized to add a mailbox at " ^ mailbox,
 952                                               SOME "You're not authorized to use that mailbox location.")
 953                                          else
 954                                              case Vmail.add {requester = user,
 955                                                              domain = domain, user = emailUser,
 956                                                              passwd = passwd, mailbox = mailbox} of
 957                                                  NONE => ("Added mailbox " ^ emailUser ^ "@" ^ domain ^ " at " ^ mailbox,
 958                                                           NONE)
 959                                                | SOME msg => ("Error adding mailbox " ^ emailUser ^ "@" ^ domain ^ ": " ^ msg,
 960                                                               SOME msg))
 961                                      (fn () => ())
 962
 963                               | MsgPasswdMailbox {domain, user = emailUser, passwd} =>
 964                                 doIt (fn () =>
 965                                          if not (Domain.yourDomain domain) then
 966                                              ("User wasn't authorized to change password of a mailbox for " ^ domain,
 967                                               SOME "You're not authorized to configure that domain.")
 968                                          else if not (Domain.validEmailUser emailUser) then
 969                                              ("Invalid e-mail username " ^ emailUser,
 970                                               SOME "Invalid e-mail username")
 971                                          else if not (CharVector.all Char.isGraph passwd) then
 972                                              ("Invalid password",
 973                                               SOME "Invalid password; may only contain printable, non-space characters")
 974                                          else
 975                                              case Vmail.passwd {domain = domain, user = emailUser,
 976                                                                 passwd = passwd} of
 977                                                  NONE => ("Changed password of mailbox " ^ emailUser ^ "@" ^ domain,
 978                                                           NONE)
 979                                                | SOME msg => ("Error changing mailbox password for " ^ emailUser ^ "@" ^ domain ^ ": " ^ msg,
 980                                                               SOME msg))
 981                                      (fn () => ())
 982
 983                               | MsgRmMailbox {domain, user = emailUser} =>
 984                                 doIt (fn () =>
 985                                          if not (Domain.yourDomain domain) then
 986                                              ("User wasn't authorized to change password of a mailbox for " ^ domain,
 987                                               SOME "You're not authorized to configure that domain.")
 988                                          else if not (Domain.validEmailUser emailUser) then
 989                                              ("Invalid e-mail username " ^ emailUser,
 990                                               SOME "Invalid e-mail username")
 991                                          else
 992                                              case Vmail.rm {domain = domain, user = emailUser} of
 993                                                  NONE => ("Deleted mailbox " ^ emailUser ^ "@" ^ domain,
 994                                                           NONE)
 995                                                | SOME msg => ("Error deleting mailbox " ^ emailUser ^ "@" ^ domain ^ ": " ^ msg,
 996                                                               SOME msg))
 997                                      (fn () => ())
 998
 999                               | MsgSaQuery addr =>
1000                                 doIt (fn () =>
1001                                          case checkAddr addr of
1002                                              NONE => ("User tried to query SA filtering for " ^ addr,
1003                                                       SOME "You aren't allowed to configure SA filtering for that recipient.")
1004                                            | SOME addr' => (Msg.send (bio, MsgSaStatus (SetSA.query addr'));
1005                                                             ("Queried SA filtering status for " ^ addr,
1006                                                              NONE)))
1007                                      (fn () => ())
1008
1009                               | MsgSaSet (addr, b) =>
1010                                 doIt (fn () =>
1011                                          case checkAddr addr of
1012                                              NONE => ("User tried to set SA filtering for " ^ addr,
1013                                                       SOME "You aren't allowed to configure SA filtering for that recipient.")
1014                                            | SOME addr' => (SetSA.set (addr', b);
1015                                                             Msg.send (bio, MsgOk);
1016                                                             ("Set SA filtering status for " ^ addr ^ " to "
1017                                                              ^ (if b then "ON" else "OFF"),
1018                                                              NONE)))
1019                                      (fn () => ())
1020
1021                               | MsgSmtpLogReq domain =>
1022                                 doIt (fn () =>
1023                                          if not (Domain.yourDomain domain) then
1024                                              ("Unauthorized user tried to request SMTP logs for " ^ domain,
1025                                               SOME "You aren't authorized to configure that domain.")
1026                                          else
1027                                              (SmtpLog.search (fn line => Msg.send (bio, MsgSmtpLogRes line))
1028                                               domain;
1029                                               ("Requested SMTP logs for " ^ domain,
1030                                                NONE)))
1031                                 (fn () => ())
1032
1033                               | _ =>
1034                                 doIt (fn () => ("Unexpected command",
1035                                                 SOME "Unexpected command"))
1036                                      (fn () => ())
1037                 in
1038                     cmdLoop ()
1039                 end
1040                     handle OpenSSL.OpenSSL s =>
1041                            (print ("OpenSSL error: " ^ s ^ "\n");
1042                             OpenSSL.close bio
1043                             handle OpenSSL.OpenSSL _ => ();
1044                             loop ())
1045                          | OS.SysErr (s, _) =>
1046                            (print ("System error: " ^ s ^ "\n");
1047                             OpenSSL.close bio
1048                             handle OpenSSL.OpenSSL _ => ();
1049                             loop ())
1050     in
1051         print ("Domtool dispatcher starting up at " ^ now () ^ "\n");
1052         print "Listening for connections....\n";
1053         loop ();
1054         OpenSSL.shutdown sock
1055     end
1056
1057 fun slave () =
1058     let
1059         val host = Slave.hostname ()
1060
1061         val context = OpenSSL.context (Config.certDir ^ "/" ^ host ^ ".pem",
1062                                        Config.keyDir ^ "/" ^ host ^ "/key.pem",
1063                                        Config.trustStore)
1064
1065         val sock = OpenSSL.listen (context, Config.slavePort)
1066
1067         val _ = print ("Slave server starting at " ^ now () ^ "\n")
1068
1069         fun loop () =
1070             case OpenSSL.accept sock of
1071                 NONE => ()
1072               | SOME bio =>
1073                 let
1074                     val peer = OpenSSL.peerCN bio
1075                     val () = print ("\nConnection from " ^ peer ^ " at " ^ now () ^ "\n")
1076                 in
1077                     if peer = Config.dispatcherName then let
1078                             fun loop' files =
1079                                 case Msg.recv bio of
1080                                     NONE => print "Dispatcher closed connection unexpectedly\n"
1081                                   | SOME m =>
1082                                     case m of
1083                                         MsgFile file => loop' (file :: files)
1084                                       | MsgDoFiles => (Slave.handleChanges files;
1085                                                        Msg.send (bio, MsgOk))
1086                                       | MsgRegenerate => (Domain.resetLocal ();
1087                                                           Msg.send (bio, MsgOk))
1088                                       | _ => (print "Dispatcher sent unexpected command\n";
1089                                               Msg.send (bio, MsgError "Unexpected command"))
1090                         in
1091                             loop' [];
1092                             ignore (OpenSSL.readChar bio);
1093                             OpenSSL.close bio;
1094                             loop ()
1095                         end
1096                     else if peer = "domtool" then
1097                         case Msg.recv bio of
1098                             SOME MsgShutdown => (OpenSSL.close bio;
1099                                                  print ("Shutting down at " ^ now () ^ "\n\n"))
1100                           | _ => (OpenSSL.close bio;
1101                                   loop ())
1102                     else
1103                         (print "Not authorized!\n";
1104                          OpenSSL.close bio;
1105                          loop ())
1106                 end handle OpenSSL.OpenSSL s =>
1107                            (print ("OpenSSL error: "^ s ^ "\n");
1108                             OpenSSL.close bio
1109                                           handle OpenSSL.OpenSSL _ => ();
1110                             loop ())
1111                          | OS.SysErr (s, _) =>
1112                            (print ("System error: "^ s ^ "\n");
1113                             OpenSSL.close bio
1114                             handle OpenSSL.OpenSSL _ => ();
1115                             loop ())
1116     in
1117         loop ();
1118         OpenSSL.shutdown sock
1119     end
1120
1121 fun listBasis () =
1122     let
1123         val dir = Posix.FileSys.opendir Config.libRoot
1124
1125         fun loop files =
1126             case Posix.FileSys.readdir dir of
1127                 NONE => (Posix.FileSys.closedir dir;
1128                          files)
1129               | SOME fname =>
1130                 if String.isSuffix ".dtl" fname then
1131                     loop (OS.Path.joinDirFile {dir = Config.libRoot,
1132                                                file = fname}
1133                           :: files)
1134                 else
1135                     loop files
1136     in
1137         loop []
1138     end
1139
1140 fun autodocBasis outdir =
1141     Autodoc.autodoc {outdir = outdir, infiles = listBasis ()}
1142
1143 end