src/msg.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 (* Network messages *)
  20
  21 structure Msg :> MSG = struct
  22
  23 open OpenSSL MsgTypes Slave
  24
  25 val a2i = fn Add => 0
  26            | Delete => 1
  27            | Modify => 2
  28
  29 val i2a = fn 0 => Add
  30            | 1 => Delete
  31            | 2 => Modify
  32            | _ => raise OpenSSL.OpenSSL "Bad action number to deserialize"
  33
  34 fun sendAcl (bio, {user, class, value}) =
  35     (OpenSSL.writeString (bio, user);
  36      OpenSSL.writeString (bio, class);
  37      OpenSSL.writeString (bio, value))
  38
  39 fun recvAcl bio =
  40     case (OpenSSL.readString bio, OpenSSL.readString bio, OpenSSL.readString bio) of
  41         (SOME user, SOME class, SOME value) => SOME {user = user, class = class, value = value}
  42       | _ => NONE
  43
  44 fun sendList f (bio, ls) =
  45     (app (fn x =>
  46              (OpenSSL.writeInt (bio, 1);
  47               f (bio, x))) ls;
  48      OpenSSL.writeInt (bio, 0))
  49
  50 fun recvList f bio =
  51     let
  52         fun loop ls =
  53             case OpenSSL.readInt bio of
  54                 SOME 0 => SOME (rev ls)
  55               | SOME 1 =>
  56                 (case f bio of
  57                      SOME x => loop (x :: ls)
  58                    | NONE => NONE)
  59               | _ => NONE
  60     in
  61         loop []
  62     end
  63
  64 fun sendOption f (bio, opt) =
  65     case opt of
  66         NONE => OpenSSL.writeInt (bio, 0)
  67       | SOME x => (OpenSSL.writeInt (bio, 1);
  68                    f (bio, x))
  69
  70 fun recvOption f bio =
  71     case OpenSSL.readInt bio of
  72         SOME 0 => SOME NONE
  73       | SOME 1 =>
  74         (case f bio of
  75              SOME x => SOME (SOME x)
  76            | NONE => NONE)
  77       | _ => NONE
  78
  79 fun sendBool (bio, b) =
  80     if b then
  81         OpenSSL.writeInt (bio, 1)
  82     else
  83         OpenSSL.writeInt (bio, 0)
  84
  85 fun recvBool bio =
  86     case OpenSSL.readInt bio of
  87         SOME 0 => SOME false
  88       | SOME 1 => SOME true
  89       | _ => NONE
  90
  91 fun sendQuery (bio, q) =
  92     case q of
  93         QApt s => (OpenSSL.writeInt (bio, 0);
  94                    OpenSSL.writeString (bio, s))
  95       | QCron s => (OpenSSL.writeInt (bio, 1);
  96                     OpenSSL.writeString (bio, s))
  97       | QFtp s => (OpenSSL.writeInt (bio, 2);
  98                    OpenSSL.writeString (bio, s))
  99
 100 fun recvQuery bio =
 101     case OpenSSL.readInt bio of
 102         SOME n =>
 103         (case n of
 104              0 => Option.map QApt (OpenSSL.readString bio)
 105            | 1 => Option.map QCron (OpenSSL.readString bio)
 106            | 2 => Option.map QFtp (OpenSSL.readString bio)
 107            | _ => NONE)
 108       | NONE => NONE
 109
 110 fun send (bio, m) =
 111     case m of
 112         MsgOk => OpenSSL.writeInt (bio, 1)
 113       | MsgError s => (OpenSSL.writeInt (bio, 2);
 114                        OpenSSL.writeString (bio, s))
 115       | MsgConfig s => (OpenSSL.writeInt (bio, 3);
 116                        OpenSSL.writeString (bio, s))
 117       | MsgFile {action, domain, dir, file} =>
 118         (OpenSSL.writeInt (bio, 4);
 119          OpenSSL.writeInt (bio, a2i action);
 120          OpenSSL.writeString (bio, domain);
 121          OpenSSL.writeString (bio, dir);
 122          OpenSSL.writeString (bio, file))
 123       | MsgDoFiles => OpenSSL.writeInt (bio, 5)
 124       | MsgGrant acl => (OpenSSL.writeInt (bio, 6);
 125                          sendAcl (bio, acl))
 126       | MsgRevoke acl => (OpenSSL.writeInt (bio, 7);
 127                           sendAcl (bio, acl))
 128       | MsgListPerms user => (OpenSSL.writeInt (bio, 8);
 129                               OpenSSL.writeString (bio, user))
 130       | MsgPerms classes => (OpenSSL.writeInt (bio, 9);
 131                              sendList (fn (bio, (class, values)) =>
 132                                           (OpenSSL.writeString (bio, class);
 133                                            sendList OpenSSL.writeString (bio, values)))
 134                                       (bio, classes))
 135       | MsgWhoHas {class, value} => (OpenSSL.writeInt (bio, 10);
 136                                      OpenSSL.writeString (bio, class);
 137                                      OpenSSL.writeString (bio, value))
 138       | MsgWhoHasResponse users => (OpenSSL.writeInt (bio, 11);
 139                                     sendList OpenSSL.writeString (bio, users))
 140       | MsgMultiConfig codes => (OpenSSL.writeInt (bio, 12);
 141                                  sendList OpenSSL.writeString (bio, codes))
 142       | MsgRmdom doms => (OpenSSL.writeInt (bio, 13);
 143                           sendList OpenSSL.writeString (bio, doms))
 144       | MsgRegenerate => OpenSSL.writeInt (bio, 14)
 145       | MsgRmuser dom => (OpenSSL.writeInt (bio, 15);
 146                           OpenSSL.writeString (bio, dom))
 147       | MsgCreateDbUser {dbtype, passwd} => (OpenSSL.writeInt (bio, 16);
 148                                              OpenSSL.writeString (bio, dbtype);
 149                                              sendOption OpenSSL.writeString (bio, passwd))
 150       | MsgCreateDbTable {dbtype, dbname} => (OpenSSL.writeInt (bio, 17);
 151                                               OpenSSL.writeString (bio, dbtype);
 152                                               OpenSSL.writeString (bio, dbname))
 153       | MsgNewMailbox {domain, user, passwd, mailbox} =>
 154         (OpenSSL.writeInt (bio, 18);
 155          OpenSSL.writeString (bio, domain);
 156          OpenSSL.writeString (bio, user);
 157          OpenSSL.writeString (bio, passwd);
 158          OpenSSL.writeString (bio, mailbox))
 159       | MsgPasswdMailbox {domain, user, passwd} =>
 160         (OpenSSL.writeInt (bio, 19);
 161          OpenSSL.writeString (bio, domain);
 162          OpenSSL.writeString (bio, user);
 163          OpenSSL.writeString (bio, passwd))
 164       | MsgRmMailbox {domain, user} =>
 165         (OpenSSL.writeInt (bio, 20);
 166          OpenSSL.writeString (bio, domain);
 167          OpenSSL.writeString (bio, user))
 168       | MsgListMailboxes domain =>
 169         (OpenSSL.writeInt (bio, 21);
 170          OpenSSL.writeString (bio, domain))
 171       | MsgMailboxes users =>
 172         (OpenSSL.writeInt (bio, 22);
 173          sendList (fn (bio, {user, mailbox}) =>
 174                             (OpenSSL.writeString (bio, user);
 175                              OpenSSL.writeString (bio, mailbox)))
 176          (bio, users))
 177       | MsgSaQuery addr => (OpenSSL.writeInt (bio, 23);
 178                             OpenSSL.writeString (bio, addr))
 179       | MsgSaStatus b => (OpenSSL.writeInt (bio, 24);
 180                           sendBool (bio, b))
 181       | MsgSaSet (addr, b) => (OpenSSL.writeInt (bio, 25);
 182                                OpenSSL.writeString (bio, addr);
 183                                sendBool (bio, b))
 184       | MsgSmtpLogReq domain => (OpenSSL.writeInt (bio, 26);
 185                                  OpenSSL.writeString (bio, domain))
 186       | MsgSmtpLogRes domain => (OpenSSL.writeInt (bio, 27);
 187                                  OpenSSL.writeString (bio, domain))
 188       | MsgDbPasswd {dbtype, passwd} => (OpenSSL.writeInt (bio, 28);
 189                                          OpenSSL.writeString (bio, dbtype);
 190                                          OpenSSL.writeString (bio, passwd))
 191       | MsgShutdown => OpenSSL.writeInt (bio, 29)
 192       | MsgYes => OpenSSL.writeInt (bio, 30)
 193       | MsgNo => OpenSSL.writeInt (bio, 31)
 194       | MsgQuery q => (OpenSSL.writeInt (bio, 32);
 195                        sendQuery (bio, q))
 196
 197 fun checkIt v =
 198     case v of
 199         NONE => raise OpenSSL.OpenSSL "Bad Msg format"
 200       | _ => v
 201
 202 fun recv bio =
 203     case OpenSSL.readInt bio of
 204         NONE => NONE
 205       | SOME n =>
 206         checkIt (case n of
 207                      1 => SOME MsgOk
 208                    | 2 => Option.map MsgError (OpenSSL.readString bio)
 209                    | 3 => Option.map MsgConfig (OpenSSL.readString bio)
 210                    | 4 => (case (OpenSSL.readInt bio,
 211                                  OpenSSL.readString bio,
 212                                  OpenSSL.readString bio,
 213                                  OpenSSL.readString bio) of
 214                                (SOME action, SOME domain, SOME dir, SOME file) =>
 215                                SOME (MsgFile {action = i2a action,
 216                                               domain = domain,
 217                                               dir = dir,
 218                                               file = file})
 219                              | _ => NONE)
 220                    | 5 => SOME MsgDoFiles
 221                    | 6 => (case recvAcl bio of
 222                                SOME acl => SOME (MsgGrant acl)
 223                              | _ => NONE)
 224                    | 7 => (case recvAcl bio of
 225                                SOME acl => SOME (MsgRevoke acl)
 226                              | _ => NONE)
 227                    | 8 => (case OpenSSL.readString bio of
 228                                SOME user => SOME (MsgListPerms user)
 229                              | _ => NONE)
 230                    | 9 => Option.map MsgPerms
 231                                      (recvList (fn bio =>
 232                                                    case (OpenSSL.readString bio,
 233                                                          recvList OpenSSL.readString bio) of
 234                                                        (SOME class, SOME values) => SOME (class, values)
 235                                                      | _ => NONE) bio)
 236                    | 10 => (case (OpenSSL.readString bio, OpenSSL.readString bio) of
 237                                 (SOME class, SOME value) => SOME (MsgWhoHas {class = class, value = value})
 238                               | _ => NONE)
 239                    | 11 => Option.map MsgWhoHasResponse
 240                            (recvList OpenSSL.readString bio)
 241                    | 12 => Option.map MsgMultiConfig
 242                            (recvList OpenSSL.readString bio)
 243                    | 13 => Option.map MsgRmdom (recvList OpenSSL.readString bio)
 244                    | 14 => SOME MsgRegenerate
 245                    | 15 => Option.map MsgRmuser (OpenSSL.readString bio)
 246                    | 16 => (case (OpenSSL.readString bio, recvOption OpenSSL.readString bio) of
 247                                 (SOME dbtype, SOME passwd) =>
 248                                 SOME (MsgCreateDbUser {dbtype = dbtype, passwd = passwd})
 249                               | _ => NONE)
 250                    | 17 => (case (OpenSSL.readString bio, OpenSSL.readString bio) of
 251                                 (SOME dbtype, SOME dbname) =>
 252                                 SOME (MsgCreateDbTable {dbtype = dbtype, dbname = dbname})
 253                               | _ => NONE)
 254                    | 18 => (case (OpenSSL.readString bio, OpenSSL.readString bio,
 255                                   OpenSSL.readString bio, OpenSSL.readString bio) of
 256                                 (SOME domain, SOME user, SOME passwd, SOME mailbox) =>
 257                                 SOME (MsgNewMailbox {domain = domain, user = user,
 258                                                      passwd = passwd, mailbox = mailbox})
 259                               | _ => NONE)
 260                    | 19 => (case (OpenSSL.readString bio, OpenSSL.readString bio,
 261                                   OpenSSL.readString bio) of
 262                                 (SOME domain, SOME user, SOME passwd) =>
 263                                 SOME (MsgPasswdMailbox {domain = domain, user = user,
 264                                                         passwd = passwd})
 265                               | _ => NONE)
 266                    | 20 => (case (OpenSSL.readString bio, OpenSSL.readString bio) of
 267                                 (SOME domain, SOME user) =>
 268                                 SOME (MsgRmMailbox {domain = domain, user = user})
 269                               | _ => NONE)
 270                    | 21 => Option.map MsgListMailboxes (OpenSSL.readString bio)
 271                    | 22 => Option.map MsgMailboxes (recvList
 272                                                         (fn bio =>
 273                                                             case (OpenSSL.readString bio,
 274                                                                   OpenSSL.readString bio) of
 275                                                                 (SOME user, SOME mailbox) =>
 276                                                                 SOME {user = user, mailbox = mailbox}
 277                                                               | _ => NONE)
 278                                                         bio)
 279                    | 23 => Option.map MsgSaQuery (OpenSSL.readString bio)
 280                    | 24 => Option.map MsgSaStatus (recvBool bio)
 281                    | 25 => (case (OpenSSL.readString bio, recvBool bio) of
 282                                 (SOME user, SOME b) => SOME (MsgSaSet (user, b))
 283                               | _ => NONE)
 284                    | 26 => Option.map MsgSmtpLogReq (OpenSSL.readString bio)
 285                    | 27 => Option.map MsgSmtpLogRes (OpenSSL.readString bio)
 286                    | 28 => (case (OpenSSL.readString bio, OpenSSL.readString bio) of
 287                                 (SOME dbtype, SOME passwd) =>
 288                                 SOME (MsgDbPasswd {dbtype = dbtype, passwd = passwd})
 289                               | _ => NONE)
 290                    | 29 => SOME MsgShutdown
 291                    | 30 => SOME MsgYes
 292                    | 31 => SOME MsgNo
 293                    | 32 => Option.map MsgQuery (recvQuery bio)
 294                    | _ => NONE)
 295
 296 end