| 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 send (bio, m) = |
| 45 | case m of |
| 46 | MsgOk => OpenSSL.writeInt (bio, 1) |
| 47 | | MsgError s => (OpenSSL.writeInt (bio, 2); |
| 48 | OpenSSL.writeString (bio, s)) |
| 49 | | MsgConfig s => (OpenSSL.writeInt (bio, 3); |
| 50 | OpenSSL.writeString (bio, s)) |
| 51 | | MsgFile {action, domain, dir, file} => |
| 52 | (OpenSSL.writeInt (bio, 4); |
| 53 | OpenSSL.writeInt (bio, a2i action); |
| 54 | OpenSSL.writeString (bio, domain); |
| 55 | OpenSSL.writeString (bio, dir); |
| 56 | OpenSSL.writeString (bio, file)) |
| 57 | | MsgDoFiles => OpenSSL.writeInt (bio, 5) |
| 58 | | MsgGrant acl => (OpenSSL.writeInt (bio, 6); |
| 59 | sendAcl (bio, acl)) |
| 60 | |
| 61 | fun checkIt v = |
| 62 | case v of |
| 63 | NONE => raise OpenSSL.OpenSSL "Bad Msg format" |
| 64 | | _ => v |
| 65 | |
| 66 | fun recv bio = |
| 67 | case OpenSSL.readInt bio of |
| 68 | NONE => NONE |
| 69 | | SOME n => |
| 70 | checkIt (case n of |
| 71 | 1 => SOME MsgOk |
| 72 | | 2 => Option.map MsgError (OpenSSL.readString bio) |
| 73 | | 3 => Option.map MsgConfig (OpenSSL.readString bio) |
| 74 | | 4 => (case (OpenSSL.readInt bio, |
| 75 | OpenSSL.readString bio, |
| 76 | OpenSSL.readString bio, |
| 77 | OpenSSL.readString bio) of |
| 78 | (SOME action, SOME domain, SOME dir, SOME file) => |
| 79 | SOME (MsgFile {action = i2a action, |
| 80 | domain = domain, |
| 81 | dir = dir, |
| 82 | file = file}) |
| 83 | | _ => NONE) |
| 84 | | 5 => SOME MsgDoFiles |
| 85 | | 6 => (case recvAcl bio of |
| 86 | SOME acl => SOME (MsgGrant acl) |
| 87 | | _ => NONE) |
| 88 | | _ => NONE) |
| 89 | |
| 90 | end |