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 send (bio, m) =
  92     case m of
  93         MsgOk => OpenSSL.writeInt (bio, 1)
  94       | MsgError s => (OpenSSL.writeInt (bio, 2);
  95                        OpenSSL.writeString (bio, s))
  96       | MsgConfig s => (OpenSSL.writeInt (bio, 3);
  97                        OpenSSL.writeString (bio, s))
  98       | MsgFile {action, domain, dir, file} =>
  99         (OpenSSL.writeInt (bio, 4);
 100          OpenSSL.writeInt (bio, a2i action);
 101          OpenSSL.writeString (bio, domain);
 102          OpenSSL.writeString (bio, dir);
 103          OpenSSL.writeString (bio, file))
 104       | MsgDoFiles => OpenSSL.writeInt (bio, 5)
 105       | MsgGrant acl => (OpenSSL.writeInt (bio, 6);
 106                          sendAcl (bio, acl))
 107       | MsgRevoke acl => (OpenSSL.writeInt (bio, 7);
 108                           sendAcl (bio, acl))
 109       | MsgListPerms user => (OpenSSL.writeInt (bio, 8);
 110                               OpenSSL.writeString (bio, user))
 111       | MsgPerms classes => (OpenSSL.writeInt (bio, 9);
 112                              sendList (fn (bio, (class, values)) =>
 113                                           (OpenSSL.writeString (bio, class);
 114                                            sendList OpenSSL.writeString (bio, values)))
 115                                       (bio, classes))
 116       | MsgWhoHas {class, value} => (OpenSSL.writeInt (bio, 10);
 117                                      OpenSSL.writeString (bio, class);
 118                                      OpenSSL.writeString (bio, value))
 119       | MsgWhoHasResponse users => (OpenSSL.writeInt (bio, 11);
 120                                     sendList OpenSSL.writeString (bio, users))
 121       | MsgMultiConfig codes => (OpenSSL.writeInt (bio, 12);
 122                                  sendList OpenSSL.writeString (bio, codes))
 123       | MsgRmdom doms => (OpenSSL.writeInt (bio, 13);
 124                           sendList OpenSSL.writeString (bio, doms))
 125       | MsgRegenerate => OpenSSL.writeInt (bio, 14)
 126       | MsgRmuser dom => (OpenSSL.writeInt (bio, 15);
 127                           OpenSSL.writeString (bio, dom))
 128       | MsgCreateDbUser {dbtype, passwd} => (OpenSSL.writeInt (bio, 16);
 129                                              OpenSSL.writeString (bio, dbtype);
 130                                              sendOption OpenSSL.writeString (bio, passwd))
 131       | MsgCreateDbTable {dbtype, dbname} => (OpenSSL.writeInt (bio, 17);
 132                                               OpenSSL.writeString (bio, dbtype);
 133                                               OpenSSL.writeString (bio, dbname))
 134       | MsgNewMailbox {domain, user, passwd, mailbox} =>
 135         (OpenSSL.writeInt (bio, 18);
 136          OpenSSL.writeString (bio, domain);
 137          OpenSSL.writeString (bio, user);
 138          OpenSSL.writeString (bio, passwd);
 139          OpenSSL.writeString (bio, mailbox))
 140       | MsgPasswdMailbox {domain, user, passwd} =>
 141         (OpenSSL.writeInt (bio, 19);
 142          OpenSSL.writeString (bio, domain);
 143          OpenSSL.writeString (bio, user);
 144          OpenSSL.writeString (bio, passwd))
 145       | MsgRmMailbox {domain, user} =>
 146         (OpenSSL.writeInt (bio, 20);
 147          OpenSSL.writeString (bio, domain);
 148          OpenSSL.writeString (bio, user))
 149       | MsgListMailboxes domain =>
 150         (OpenSSL.writeInt (bio, 21);
 151          OpenSSL.writeString (bio, domain))
 152       | MsgMailboxes users =>
 153         (OpenSSL.writeInt (bio, 22);
 154          sendList (fn (bio, {user, mailbox}) =>
 155                             (OpenSSL.writeString (bio, user);
 156                              OpenSSL.writeString (bio, mailbox)))
 157          (bio, users))
 158       | MsgSaQuery addr => (OpenSSL.writeInt (bio, 23);
 159                             OpenSSL.writeString (bio, addr))
 160       | MsgSaStatus b => (OpenSSL.writeInt (bio, 24);
 161                           sendBool (bio, b))
 162       | MsgSaSet (addr, b) => (OpenSSL.writeInt (bio, 25);
 163                                OpenSSL.writeString (bio, addr);
 164                                sendBool (bio, b))
 165       | MsgSmtpLogReq domain => (OpenSSL.writeInt (bio, 26);
 166                                  OpenSSL.writeString (bio, domain))
 167       | MsgSmtpLogRes domain => (OpenSSL.writeInt (bio, 27);
 168                                  OpenSSL.writeString (bio, domain))
 169
 170 fun checkIt v =
 171     case v of
 172         NONE => raise OpenSSL.OpenSSL "Bad Msg format"
 173       | _ => v
 174
 175 fun recv bio =
 176     case OpenSSL.readInt bio of
 177         NONE => NONE
 178       | SOME n =>
 179         checkIt (case n of
 180                      1 => SOME MsgOk
 181                    | 2 => Option.map MsgError (OpenSSL.readString bio)
 182                    | 3 => Option.map MsgConfig (OpenSSL.readString bio)
 183                    | 4 => (case (OpenSSL.readInt bio,
 184                                  OpenSSL.readString bio,
 185                                  OpenSSL.readString bio,
 186                                  OpenSSL.readString bio) of
 187                                (SOME action, SOME domain, SOME dir, SOME file) =>
 188                                SOME (MsgFile {action = i2a action,
 189                                               domain = domain,
 190                                               dir = dir,
 191                                               file = file})
 192                              | _ => NONE)
 193                    | 5 => SOME MsgDoFiles
 194                    | 6 => (case recvAcl bio of
 195                                SOME acl => SOME (MsgGrant acl)
 196                              | _ => NONE)
 197                    | 7 => (case recvAcl bio of
 198                                SOME acl => SOME (MsgRevoke acl)
 199                              | _ => NONE)
 200                    | 8 => (case OpenSSL.readString bio of
 201                                SOME user => SOME (MsgListPerms user)
 202                              | _ => NONE)
 203                    | 9 => Option.map MsgPerms
 204                                      (recvList (fn bio =>
 205                                                    case (OpenSSL.readString bio,
 206                                                          recvList OpenSSL.readString bio) of
 207                                                        (SOME class, SOME values) => SOME (class, values)
 208                                                      | _ => NONE) bio)
 209                    | 10 => (case (OpenSSL.readString bio, OpenSSL.readString bio) of
 210                                 (SOME class, SOME value) => SOME (MsgWhoHas {class = class, value = value})
 211                               | _ => NONE)
 212                    | 11 => Option.map MsgWhoHasResponse
 213                            (recvList OpenSSL.readString bio)
 214                    | 12 => Option.map MsgMultiConfig
 215                            (recvList OpenSSL.readString bio)
 216                    | 13 => Option.map MsgRmdom (recvList OpenSSL.readString bio)
 217                    | 14 => SOME MsgRegenerate
 218                    | 15 => Option.map MsgRmuser (OpenSSL.readString bio)
 219                    | 16 => (case (OpenSSL.readString bio, recvOption OpenSSL.readString bio) of
 220                                 (SOME dbtype, SOME passwd) =>
 221                                 SOME (MsgCreateDbUser {dbtype = dbtype, passwd = passwd})
 222                               | _ => NONE)
 223                    | 17 => (case (OpenSSL.readString bio, OpenSSL.readString bio) of
 224                                 (SOME dbtype, SOME dbname) =>
 225                                 SOME (MsgCreateDbTable {dbtype = dbtype, dbname = dbname})
 226                               | _ => NONE)
 227                    | 18 => (case (OpenSSL.readString bio, OpenSSL.readString bio,
 228                                   OpenSSL.readString bio, OpenSSL.readString bio) of
 229                                 (SOME domain, SOME user, SOME passwd, SOME mailbox) =>
 230                                 SOME (MsgNewMailbox {domain = domain, user = user,
 231                                                      passwd = passwd, mailbox = mailbox})
 232                               | _ => NONE)
 233                    | 19 => (case (OpenSSL.readString bio, OpenSSL.readString bio,
 234                                   OpenSSL.readString bio) of
 235                                 (SOME domain, SOME user, SOME passwd) =>
 236                                 SOME (MsgPasswdMailbox {domain = domain, user = user,
 237                                                         passwd = passwd})
 238                               | _ => NONE)
 239                    | 20 => (case (OpenSSL.readString bio, OpenSSL.readString bio) of
 240                                 (SOME domain, SOME user) =>
 241                                 SOME (MsgRmMailbox {domain = domain, user = user})
 242                               | _ => NONE)
 243                    | 21 => Option.map MsgListMailboxes (OpenSSL.readString bio)
 244                    | 22 => Option.map MsgMailboxes (recvList
 245                                                         (fn bio =>
 246                                                             case (OpenSSL.readString bio,
 247                                                                   OpenSSL.readString bio) of
 248                                                                 (SOME user, SOME mailbox) =>
 249                                                                 SOME {user = user, mailbox = mailbox}
 250                                                               | _ => NONE)
 251                                                         bio)
 252                    | 23 => Option.map MsgSaQuery (OpenSSL.readString bio)
 253                    | 24 => Option.map MsgSaStatus (recvBool bio)
 254                    | 25 => (case (OpenSSL.readString bio, recvBool bio) of
 255                                 (SOME user, SOME b) => SOME (MsgSaSet (user, b))
 256                               | _ => NONE)
 257                    | 26 => Option.map MsgSmtpLogReq (OpenSSL.readString bio)
 258                    | 27 => Option.map MsgSmtpLogRes (OpenSSL.readString bio)
 259                    | _ => NONE)
 260
 261 end