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 sendSockPerm (bio, p) =
  92     case p of
  93         Any => OpenSSL.writeInt (bio, 0)
  94       | Client => OpenSSL.writeInt (bio, 1)
  95       | Server => OpenSSL.writeInt (bio, 2)
  96       | Nada => OpenSSL.writeInt (bio, 3)
  97
  98 fun recvSockPerm bio =
  99     case OpenSSL.readInt bio of
 100         SOME 0 => SOME Any
 101       | SOME 1 => SOME Client
 102       | SOME 2 => SOME Server
 103       | SOME 3 => SOME Nada
 104       | _ => NONE
 105
 106 fun sendQuery (bio, q) =
 107     case q of
 108         QApt s => (OpenSSL.writeInt (bio, 0);
 109                    OpenSSL.writeString (bio, s))
 110       | QCron s => (OpenSSL.writeInt (bio, 1);
 111                     OpenSSL.writeString (bio, s))
 112       | QFtp s => (OpenSSL.writeInt (bio, 2);
 113                    OpenSSL.writeString (bio, s))
 114       | QTrustedPath s => (OpenSSL.writeInt (bio, 3);
 115                            OpenSSL.writeString (bio, s))
 116       | QSocket s => (OpenSSL.writeInt (bio, 4);
 117                       OpenSSL.writeString (bio, s))
 118       | QFirewall s => (OpenSSL.writeInt (bio, 5);
 119                         OpenSSL.writeString (bio, s))
 120
 121 fun recvQuery bio =
 122     case OpenSSL.readInt bio of
 123         SOME n =>
 124         (case n of
 125              0 => Option.map QApt (OpenSSL.readString bio)
 126            | 1 => Option.map QCron (OpenSSL.readString bio)
 127            | 2 => Option.map QFtp (OpenSSL.readString bio)
 128            | 3 => Option.map QTrustedPath (OpenSSL.readString bio)
 129            | 4 => Option.map QSocket (OpenSSL.readString bio)
 130            | 5 => Option.map QFirewall (OpenSSL.readString bio)
 131            | _ => NONE)
 132       | NONE => NONE
 133
 134 fun send (bio, m) =
 135     case m of
 136         MsgOk => OpenSSL.writeInt (bio, 1)
 137       | MsgError s => (OpenSSL.writeInt (bio, 2);
 138                        OpenSSL.writeString (bio, s))
 139       | MsgConfig s => (OpenSSL.writeInt (bio, 3);
 140                        OpenSSL.writeString (bio, s))
 141       | MsgFile {action, domain, dir, file} =>
 142         (OpenSSL.writeInt (bio, 4);
 143          OpenSSL.writeInt (bio, a2i action);
 144          OpenSSL.writeString (bio, domain);
 145          OpenSSL.writeString (bio, dir);
 146          OpenSSL.writeString (bio, file))
 147       | MsgDoFiles => OpenSSL.writeInt (bio, 5)
 148       | MsgGrant acl => (OpenSSL.writeInt (bio, 6);
 149                          sendAcl (bio, acl))
 150       | MsgRevoke acl => (OpenSSL.writeInt (bio, 7);
 151                           sendAcl (bio, acl))
 152       | MsgListPerms user => (OpenSSL.writeInt (bio, 8);
 153                               OpenSSL.writeString (bio, user))
 154       | MsgPerms classes => (OpenSSL.writeInt (bio, 9);
 155                              sendList (fn (bio, (class, values)) =>
 156                                           (OpenSSL.writeString (bio, class);
 157                                            sendList OpenSSL.writeString (bio, values)))
 158                                       (bio, classes))
 159       | MsgWhoHas {class, value} => (OpenSSL.writeInt (bio, 10);
 160                                      OpenSSL.writeString (bio, class);
 161                                      OpenSSL.writeString (bio, value))
 162       | MsgWhoHasResponse users => (OpenSSL.writeInt (bio, 11);
 163                                     sendList OpenSSL.writeString (bio, users))
 164       | MsgMultiConfig codes => (OpenSSL.writeInt (bio, 12);
 165                                  sendList OpenSSL.writeString (bio, codes))
 166       | MsgRmdom doms => (OpenSSL.writeInt (bio, 13);
 167                           sendList OpenSSL.writeString (bio, doms))
 168       | MsgRegenerate => OpenSSL.writeInt (bio, 14)
 169       | MsgRmuser dom => (OpenSSL.writeInt (bio, 15);
 170                           OpenSSL.writeString (bio, dom))
 171       | MsgCreateDbUser {dbtype, passwd} => (OpenSSL.writeInt (bio, 16);
 172                                              OpenSSL.writeString (bio, dbtype);
 173                                              sendOption OpenSSL.writeString (bio, passwd))
 174       | MsgCreateDbTable {dbtype, dbname} => (OpenSSL.writeInt (bio, 17);
 175                                               OpenSSL.writeString (bio, dbtype);
 176                                               OpenSSL.writeString (bio, dbname))
 177       | MsgNewMailbox {domain, user, passwd, mailbox} =>
 178         (OpenSSL.writeInt (bio, 18);
 179          OpenSSL.writeString (bio, domain);
 180          OpenSSL.writeString (bio, user);
 181          OpenSSL.writeString (bio, passwd);
 182          OpenSSL.writeString (bio, mailbox))
 183       | MsgPasswdMailbox {domain, user, passwd} =>
 184         (OpenSSL.writeInt (bio, 19);
 185          OpenSSL.writeString (bio, domain);
 186          OpenSSL.writeString (bio, user);
 187          OpenSSL.writeString (bio, passwd))
 188       | MsgRmMailbox {domain, user} =>
 189         (OpenSSL.writeInt (bio, 20);
 190          OpenSSL.writeString (bio, domain);
 191          OpenSSL.writeString (bio, user))
 192       | MsgListMailboxes domain =>
 193         (OpenSSL.writeInt (bio, 21);
 194          OpenSSL.writeString (bio, domain))
 195       | MsgMailboxes users =>
 196         (OpenSSL.writeInt (bio, 22);
 197          sendList (fn (bio, {user, mailbox}) =>
 198                             (OpenSSL.writeString (bio, user);
 199                              OpenSSL.writeString (bio, mailbox)))
 200          (bio, users))
 201       | MsgSaQuery addr => (OpenSSL.writeInt (bio, 23);
 202                             OpenSSL.writeString (bio, addr))
 203       | MsgSaStatus b => (OpenSSL.writeInt (bio, 24);
 204                           sendBool (bio, b))
 205       | MsgSaSet (addr, b) => (OpenSSL.writeInt (bio, 25);
 206                                OpenSSL.writeString (bio, addr);
 207                                sendBool (bio, b))
 208       | MsgSmtpLogReq domain => (OpenSSL.writeInt (bio, 26);
 209                                  OpenSSL.writeString (bio, domain))
 210       | MsgSmtpLogRes domain => (OpenSSL.writeInt (bio, 27);
 211                                  OpenSSL.writeString (bio, domain))
 212       | MsgDbPasswd {dbtype, passwd} => (OpenSSL.writeInt (bio, 28);
 213                                          OpenSSL.writeString (bio, dbtype);
 214                                          OpenSSL.writeString (bio, passwd))
 215       | MsgShutdown => OpenSSL.writeInt (bio, 29)
 216       | MsgYes => OpenSSL.writeInt (bio, 30)
 217       | MsgNo => OpenSSL.writeInt (bio, 31)
 218       | MsgQuery q => (OpenSSL.writeInt (bio, 32);
 219                        sendQuery (bio, q))
 220       | MsgSocket p => (OpenSSL.writeInt (bio, 33);
 221                         sendSockPerm (bio, p))
 222       | MsgFirewall ls => (OpenSSL.writeInt (bio, 34);
 223                            sendList OpenSSL.writeString (bio, ls))
 224       | MsgRegenerateTc => OpenSSL.writeInt (bio, 35)
 225
 226 fun checkIt v =
 227     case v of
 228         NONE => raise OpenSSL.OpenSSL "Bad Msg format"
 229       | _ => v
 230
 231 fun recv bio =
 232     case OpenSSL.readInt bio of
 233         NONE => NONE
 234       | SOME n =>
 235         checkIt (case n of
 236                      1 => SOME MsgOk
 237                    | 2 => Option.map MsgError (OpenSSL.readString bio)
 238                    | 3 => Option.map MsgConfig (OpenSSL.readString bio)
 239                    | 4 => (case (OpenSSL.readInt bio,
 240                                  OpenSSL.readString bio,
 241                                  OpenSSL.readString bio,
 242                                  OpenSSL.readString bio) of
 243                                (SOME action, SOME domain, SOME dir, SOME file) =>
 244                                SOME (MsgFile {action = i2a action,
 245                                               domain = domain,
 246                                               dir = dir,
 247                                               file = file})
 248                              | _ => NONE)
 249                    | 5 => SOME MsgDoFiles
 250                    | 6 => (case recvAcl bio of
 251                                SOME acl => SOME (MsgGrant acl)
 252                              | _ => NONE)
 253                    | 7 => (case recvAcl bio of
 254                                SOME acl => SOME (MsgRevoke acl)
 255                              | _ => NONE)
 256                    | 8 => (case OpenSSL.readString bio of
 257                                SOME user => SOME (MsgListPerms user)
 258                              | _ => NONE)
 259                    | 9 => Option.map MsgPerms
 260                                      (recvList (fn bio =>
 261                                                    case (OpenSSL.readString bio,
 262                                                          recvList OpenSSL.readString bio) of
 263                                                        (SOME class, SOME values) => SOME (class, values)
 264                                                      | _ => NONE) bio)
 265                    | 10 => (case (OpenSSL.readString bio, OpenSSL.readString bio) of
 266                                 (SOME class, SOME value) => SOME (MsgWhoHas {class = class, value = value})
 267                               | _ => NONE)
 268                    | 11 => Option.map MsgWhoHasResponse
 269                            (recvList OpenSSL.readString bio)
 270                    | 12 => Option.map MsgMultiConfig
 271                            (recvList OpenSSL.readString bio)
 272                    | 13 => Option.map MsgRmdom (recvList OpenSSL.readString bio)
 273                    | 14 => SOME MsgRegenerate
 274                    | 15 => Option.map MsgRmuser (OpenSSL.readString bio)
 275                    | 16 => (case (OpenSSL.readString bio, recvOption OpenSSL.readString bio) of
 276                                 (SOME dbtype, SOME passwd) =>
 277                                 SOME (MsgCreateDbUser {dbtype = dbtype, passwd = passwd})
 278                               | _ => NONE)
 279                    | 17 => (case (OpenSSL.readString bio, OpenSSL.readString bio) of
 280                                 (SOME dbtype, SOME dbname) =>
 281                                 SOME (MsgCreateDbTable {dbtype = dbtype, dbname = dbname})
 282                               | _ => NONE)
 283                    | 18 => (case (OpenSSL.readString bio, OpenSSL.readString bio,
 284                                   OpenSSL.readString bio, OpenSSL.readString bio) of
 285                                 (SOME domain, SOME user, SOME passwd, SOME mailbox) =>
 286                                 SOME (MsgNewMailbox {domain = domain, user = user,
 287                                                      passwd = passwd, mailbox = mailbox})
 288                               | _ => NONE)
 289                    | 19 => (case (OpenSSL.readString bio, OpenSSL.readString bio,
 290                                   OpenSSL.readString bio) of
 291                                 (SOME domain, SOME user, SOME passwd) =>
 292                                 SOME (MsgPasswdMailbox {domain = domain, user = user,
 293                                                         passwd = passwd})
 294                               | _ => NONE)
 295                    | 20 => (case (OpenSSL.readString bio, OpenSSL.readString bio) of
 296                                 (SOME domain, SOME user) =>
 297                                 SOME (MsgRmMailbox {domain = domain, user = user})
 298                               | _ => NONE)
 299                    | 21 => Option.map MsgListMailboxes (OpenSSL.readString bio)
 300                    | 22 => Option.map MsgMailboxes (recvList
 301                                                         (fn bio =>
 302                                                             case (OpenSSL.readString bio,
 303                                                                   OpenSSL.readString bio) of
 304                                                                 (SOME user, SOME mailbox) =>
 305                                                                 SOME {user = user, mailbox = mailbox}
 306                                                               | _ => NONE)
 307                                                         bio)
 308                    | 23 => Option.map MsgSaQuery (OpenSSL.readString bio)
 309                    | 24 => Option.map MsgSaStatus (recvBool bio)
 310                    | 25 => (case (OpenSSL.readString bio, recvBool bio) of
 311                                 (SOME user, SOME b) => SOME (MsgSaSet (user, b))
 312                               | _ => NONE)
 313                    | 26 => Option.map MsgSmtpLogReq (OpenSSL.readString bio)
 314                    | 27 => Option.map MsgSmtpLogRes (OpenSSL.readString bio)
 315                    | 28 => (case (OpenSSL.readString bio, OpenSSL.readString bio) of
 316                                 (SOME dbtype, SOME passwd) =>
 317                                 SOME (MsgDbPasswd {dbtype = dbtype, passwd = passwd})
 318                               | _ => NONE)
 319                    | 29 => SOME MsgShutdown
 320                    | 30 => SOME MsgYes
 321                    | 31 => SOME MsgNo
 322                    | 32 => Option.map MsgQuery (recvQuery bio)
 323                    | 33 => Option.map MsgSocket (recvSockPerm bio)
 324                    | 34 => Option.map MsgFirewall (recvList OpenSSL.readString bio)
 325                    | 35 => SOME MsgRegenerateTc
 326                    | _ => NONE)
 327
 328 end