src/msg.sml

(* HCoop Domtool (http://hcoop.sourceforge.net/)
 * Copyright (c) 2006, Adam Chlipala
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 *)

(* Network messages *)

structure Msg :> MSG = struct

open OpenSSL MsgTypes Slave

val a2i = fn Add => 0
	   | Delete => 1
	   | Modify => 2

val i2a = fn 0 => Add
	   | 1 => Delete
	   | 2 => Modify
	   | _ => raise OpenSSL.OpenSSL "Bad action number to deserialize"

fun sendAcl (bio, {user, class, value}) =
    (OpenSSL.writeString (bio, user);
     OpenSSL.writeString (bio, class);
     OpenSSL.writeString (bio, value))

fun recvAcl bio =
    case (OpenSSL.readString bio, OpenSSL.readString bio, OpenSSL.readString bio) of
	(SOME user, SOME class, SOME value) => SOME {user = user, class = class, value = value}
      | _ => NONE

fun sendList f (bio, ls) =
    (app (fn x =>
	     (OpenSSL.writeInt (bio, 1);
	      f (bio, x))) ls;
     OpenSSL.writeInt (bio, 0))

fun recvList f bio =
    let
	fun loop ls =
	    case OpenSSL.readInt bio of
		SOME 0 => SOME (rev ls)
	      | SOME 1 =>
		(case f bio of
		     SOME x => loop (x :: ls)
		   | NONE => NONE)
	      | _ => NONE
    in
	loop []
    end

fun sendOption f (bio, opt) =
    case opt of
	NONE => OpenSSL.writeInt (bio, 0)
      | SOME x => (OpenSSL.writeInt (bio, 1);
		   f (bio, x))

fun recvOption f bio =
    case OpenSSL.readInt bio of
	SOME 0 => SOME NONE
      | SOME 1 =>
	(case f bio of
	     SOME x => SOME (SOME x)
	   | NONE => NONE)
      | _ => NONE

fun sendBool (bio, b) =
    if b then
	OpenSSL.writeInt (bio, 1)
    else
	OpenSSL.writeInt (bio, 0)

fun recvBool bio =
    case OpenSSL.readInt bio of
	SOME 0 => SOME false
      | SOME 1 => SOME true
      | _ => NONE

fun send (bio, m) =
    case m of
	MsgOk => OpenSSL.writeInt (bio, 1)
      | MsgError s => (OpenSSL.writeInt (bio, 2);
		       OpenSSL.writeString (bio, s))
      | MsgConfig s => (OpenSSL.writeInt (bio, 3);
		       OpenSSL.writeString (bio, s))
      | MsgFile {action, domain, dir, file} =>
	(OpenSSL.writeInt (bio, 4);
	 OpenSSL.writeInt (bio, a2i action);
	 OpenSSL.writeString (bio, domain);
	 OpenSSL.writeString (bio, dir);
	 OpenSSL.writeString (bio, file))
      | MsgDoFiles => OpenSSL.writeInt (bio, 5)
      | MsgGrant acl => (OpenSSL.writeInt (bio, 6);
			 sendAcl (bio, acl))
      | MsgRevoke acl => (OpenSSL.writeInt (bio, 7);
			  sendAcl (bio, acl))
      | MsgListPerms user => (OpenSSL.writeInt (bio, 8);
			      OpenSSL.writeString (bio, user))
      | MsgPerms classes => (OpenSSL.writeInt (bio, 9);
			     sendList (fn (bio, (class, values)) =>
					  (OpenSSL.writeString (bio, class);
					   sendList OpenSSL.writeString (bio, values)))
				      (bio, classes))
      | MsgWhoHas {class, value} => (OpenSSL.writeInt (bio, 10);
				     OpenSSL.writeString (bio, class);
				     OpenSSL.writeString (bio, value))
      | MsgWhoHasResponse users => (OpenSSL.writeInt (bio, 11);
				    sendList OpenSSL.writeString (bio, users))
      | MsgMultiConfig codes => (OpenSSL.writeInt (bio, 12);
				 sendList OpenSSL.writeString (bio, codes))
      | MsgRmdom doms => (OpenSSL.writeInt (bio, 13);
			  sendList OpenSSL.writeString (bio, doms))
      | MsgRegenerate => OpenSSL.writeInt (bio, 14)
      | MsgRmuser dom => (OpenSSL.writeInt (bio, 15);
			  OpenSSL.writeString (bio, dom))
      | MsgCreateDbUser {dbtype, passwd} => (OpenSSL.writeInt (bio, 16);
					     OpenSSL.writeString (bio, dbtype);
					     sendOption OpenSSL.writeString (bio, passwd))
      | MsgCreateDbTable {dbtype, dbname} => (OpenSSL.writeInt (bio, 17);
					      OpenSSL.writeString (bio, dbtype);
					      OpenSSL.writeString (bio, dbname))
      | MsgNewMailbox {domain, user, passwd, mailbox} =>
	(OpenSSL.writeInt (bio, 18);
	 OpenSSL.writeString (bio, domain);
	 OpenSSL.writeString (bio, user);
	 OpenSSL.writeString (bio, passwd);
	 OpenSSL.writeString (bio, mailbox))
      | MsgPasswdMailbox {domain, user, passwd} =>
	(OpenSSL.writeInt (bio, 19);
	 OpenSSL.writeString (bio, domain);
	 OpenSSL.writeString (bio, user);
	 OpenSSL.writeString (bio, passwd))
      | MsgRmMailbox {domain, user} =>
	(OpenSSL.writeInt (bio, 20);
	 OpenSSL.writeString (bio, domain);
	 OpenSSL.writeString (bio, user))
      | MsgListMailboxes domain =>
	(OpenSSL.writeInt (bio, 21);
	 OpenSSL.writeString (bio, domain))
      | MsgMailboxes users =>
	(OpenSSL.writeInt (bio, 22);
	 sendList (fn (bio, {user, mailbox}) =>
			    (OpenSSL.writeString (bio, user);
			     OpenSSL.writeString (bio, mailbox)))
	 (bio, users))
      | MsgSaQuery addr => (OpenSSL.writeInt (bio, 23);
			    OpenSSL.writeString (bio, addr))
      | MsgSaStatus b => (OpenSSL.writeInt (bio, 24);
			  sendBool (bio, b))
      | MsgSaSet (addr, b) => (OpenSSL.writeInt (bio, 25);
			       OpenSSL.writeString (bio, addr);
			       sendBool (bio, b))
      | MsgSmtpLogReq domain => (OpenSSL.writeInt (bio, 26);
				 OpenSSL.writeString (bio, domain))
      | MsgSmtpLogRes domain => (OpenSSL.writeInt (bio, 27);
				 OpenSSL.writeString (bio, domain))
      | MsgDbPasswd {dbtype, passwd} => (OpenSSL.writeInt (bio, 28);
					 OpenSSL.writeString (bio, dbtype);
					 OpenSSL.writeString (bio, passwd))
      | MsgShutdown => OpenSSL.writeInt (bio, 29)
      | MsgYes => OpenSSL.writeInt (bio, 30)
      | MsgNo => OpenSSL.writeInt (bio, 31)
      | MsgApt s => (OpenSSL.writeInt (bio, 32);
		     OpenSSL.writeString (bio, s))

fun checkIt v =
    case v of
	NONE => raise OpenSSL.OpenSSL "Bad Msg format"
      | _ => v

fun recv bio =
    case OpenSSL.readInt bio of
	NONE => NONE
      | SOME n =>
	checkIt (case n of
		     1 => SOME MsgOk
		   | 2 => Option.map MsgError (OpenSSL.readString bio)
		   | 3 => Option.map MsgConfig (OpenSSL.readString bio)
		   | 4 => (case (OpenSSL.readInt bio,
				 OpenSSL.readString bio,
				 OpenSSL.readString bio,
				 OpenSSL.readString bio) of
			       (SOME action, SOME domain, SOME dir, SOME file) =>
			       SOME (MsgFile {action = i2a action,
					      domain = domain,
					      dir = dir,
					      file = file})
			     | _ => NONE)
		   | 5 => SOME MsgDoFiles
		   | 6 => (case recvAcl bio of
			       SOME acl => SOME (MsgGrant acl)
			     | _ => NONE)
		   | 7 => (case recvAcl bio of
			       SOME acl => SOME (MsgRevoke acl)
			     | _ => NONE)
		   | 8 => (case OpenSSL.readString bio of
			       SOME user => SOME (MsgListPerms user)
			     | _ => NONE)
		   | 9 => Option.map MsgPerms
				     (recvList (fn bio =>
						   case (OpenSSL.readString bio,
							 recvList OpenSSL.readString bio) of
						       (SOME class, SOME values) => SOME (class, values)
						     | _ => NONE) bio)
		   | 10 => (case (OpenSSL.readString bio, OpenSSL.readString bio) of
				(SOME class, SOME value) => SOME (MsgWhoHas {class = class, value = value})
			      | _ => NONE)
		   | 11 => Option.map MsgWhoHasResponse
			   (recvList OpenSSL.readString bio)
		   | 12 => Option.map MsgMultiConfig
			   (recvList OpenSSL.readString bio)
		   | 13 => Option.map MsgRmdom (recvList OpenSSL.readString bio)
		   | 14 => SOME MsgRegenerate
		   | 15 => Option.map MsgRmuser (OpenSSL.readString bio)
		   | 16 => (case (OpenSSL.readString bio, recvOption OpenSSL.readString bio) of
				(SOME dbtype, SOME passwd) =>
				SOME (MsgCreateDbUser {dbtype = dbtype, passwd = passwd})
			      | _ => NONE)
		   | 17 => (case (OpenSSL.readString bio, OpenSSL.readString bio) of
				(SOME dbtype, SOME dbname) =>
				SOME (MsgCreateDbTable {dbtype = dbtype, dbname = dbname})
			      | _ => NONE)
		   | 18 => (case (OpenSSL.readString bio, OpenSSL.readString bio,
				  OpenSSL.readString bio, OpenSSL.readString bio) of
				(SOME domain, SOME user, SOME passwd, SOME mailbox) =>
				SOME (MsgNewMailbox {domain = domain, user = user,
						     passwd = passwd, mailbox = mailbox})
			      | _ => NONE)
		   | 19 => (case (OpenSSL.readString bio, OpenSSL.readString bio,
				  OpenSSL.readString bio) of
				(SOME domain, SOME user, SOME passwd) =>
				SOME (MsgPasswdMailbox {domain = domain, user = user,
							passwd = passwd})
			      | _ => NONE)
		   | 20 => (case (OpenSSL.readString bio, OpenSSL.readString bio) of
				(SOME domain, SOME user) =>
				SOME (MsgRmMailbox {domain = domain, user = user})
			      | _ => NONE)
		   | 21 => Option.map MsgListMailboxes (OpenSSL.readString bio)
		   | 22 => Option.map MsgMailboxes (recvList
							(fn bio =>
							    case (OpenSSL.readString bio,
								  OpenSSL.readString bio) of
								(SOME user, SOME mailbox) =>
								SOME {user = user, mailbox = mailbox}
							      | _ => NONE)
							bio)
		   | 23 => Option.map MsgSaQuery (OpenSSL.readString bio)
		   | 24 => Option.map MsgSaStatus (recvBool bio)
		   | 25 => (case (OpenSSL.readString bio, recvBool bio) of
				(SOME user, SOME b) => SOME (MsgSaSet (user, b))
			      | _ => NONE)
		   | 26 => Option.map MsgSmtpLogReq (OpenSSL.readString bio)
		   | 27 => Option.map MsgSmtpLogRes (OpenSSL.readString bio)
		   | 28 => (case (OpenSSL.readString bio, OpenSSL.readString bio) of
				(SOME dbtype, SOME passwd) =>
				SOME (MsgDbPasswd {dbtype = dbtype, passwd = passwd})
			      | _ => NONE)
		   | 29 => SOME MsgShutdown
		   | 30 => SOME MsgYes
		   | 31 => SOME MsgNo
		   | 32 => Option.map MsgApt (OpenSSL.readString bio)
		   | _ => NONE)

end
Commit	Line	Data
	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	\| MsgDbPasswd {dbtype, passwd} => (OpenSSL.writeInt (bio, 28);
	170	OpenSSL.writeString (bio, dbtype);
	171	OpenSSL.writeString (bio, passwd))
	172	\| MsgShutdown => OpenSSL.writeInt (bio, 29)
	173	\| MsgYes => OpenSSL.writeInt (bio, 30)
	174	\| MsgNo => OpenSSL.writeInt (bio, 31)
	175	\| MsgApt s => (OpenSSL.writeInt (bio, 32);
	176	OpenSSL.writeString (bio, s))
	177
	178	fun checkIt v =
	179	case v of
	180	NONE => raise OpenSSL.OpenSSL "Bad Msg format"
	181	\| _ => v
	182
	183	fun recv bio =
	184	case OpenSSL.readInt bio of
	185	NONE => NONE
	186	\| SOME n =>
	187	checkIt (case n of
	188	1 => SOME MsgOk
	189	\| 2 => Option.map MsgError (OpenSSL.readString bio)
	190	\| 3 => Option.map MsgConfig (OpenSSL.readString bio)
	191	\| 4 => (case (OpenSSL.readInt bio,
	192	OpenSSL.readString bio,
	193	OpenSSL.readString bio,
	194	OpenSSL.readString bio) of
	195	(SOME action, SOME domain, SOME dir, SOME file) =>
	196	SOME (MsgFile {action = i2a action,
	197	domain = domain,
	198	dir = dir,
	199	file = file})
	200	\| _ => NONE)
	201	\| 5 => SOME MsgDoFiles
	202	\| 6 => (case recvAcl bio of
	203	SOME acl => SOME (MsgGrant acl)
	204	\| _ => NONE)
	205	\| 7 => (case recvAcl bio of
	206	SOME acl => SOME (MsgRevoke acl)
	207	\| _ => NONE)
	208	\| 8 => (case OpenSSL.readString bio of
	209	SOME user => SOME (MsgListPerms user)
	210	\| _ => NONE)
	211	\| 9 => Option.map MsgPerms
	212	(recvList (fn bio =>
	213	case (OpenSSL.readString bio,
	214	recvList OpenSSL.readString bio) of
	215	(SOME class, SOME values) => SOME (class, values)
	216	\| _ => NONE) bio)
	217	\| 10 => (case (OpenSSL.readString bio, OpenSSL.readString bio) of
	218	(SOME class, SOME value) => SOME (MsgWhoHas {class = class, value = value})
	219	\| _ => NONE)
	220	\| 11 => Option.map MsgWhoHasResponse
	221	(recvList OpenSSL.readString bio)
	222	\| 12 => Option.map MsgMultiConfig
	223	(recvList OpenSSL.readString bio)
	224	\| 13 => Option.map MsgRmdom (recvList OpenSSL.readString bio)
	225	\| 14 => SOME MsgRegenerate
	226	\| 15 => Option.map MsgRmuser (OpenSSL.readString bio)
	227	\| 16 => (case (OpenSSL.readString bio, recvOption OpenSSL.readString bio) of
	228	(SOME dbtype, SOME passwd) =>
	229	SOME (MsgCreateDbUser {dbtype = dbtype, passwd = passwd})
	230	\| _ => NONE)
	231	\| 17 => (case (OpenSSL.readString bio, OpenSSL.readString bio) of
	232	(SOME dbtype, SOME dbname) =>
	233	SOME (MsgCreateDbTable {dbtype = dbtype, dbname = dbname})
	234	\| _ => NONE)
	235	\| 18 => (case (OpenSSL.readString bio, OpenSSL.readString bio,
	236	OpenSSL.readString bio, OpenSSL.readString bio) of
	237	(SOME domain, SOME user, SOME passwd, SOME mailbox) =>
	238	SOME (MsgNewMailbox {domain = domain, user = user,
	239	passwd = passwd, mailbox = mailbox})
	240	\| _ => NONE)
	241	\| 19 => (case (OpenSSL.readString bio, OpenSSL.readString bio,
	242	OpenSSL.readString bio) of
	243	(SOME domain, SOME user, SOME passwd) =>
	244	SOME (MsgPasswdMailbox {domain = domain, user = user,
	245	passwd = passwd})
	246	\| _ => NONE)
	247	\| 20 => (case (OpenSSL.readString bio, OpenSSL.readString bio) of
	248	(SOME domain, SOME user) =>
	249	SOME (MsgRmMailbox {domain = domain, user = user})
	250	\| _ => NONE)
	251	\| 21 => Option.map MsgListMailboxes (OpenSSL.readString bio)
	252	\| 22 => Option.map MsgMailboxes (recvList
	253	(fn bio =>
	254	case (OpenSSL.readString bio,
	255	OpenSSL.readString bio) of
	256	(SOME user, SOME mailbox) =>
	257	SOME {user = user, mailbox = mailbox}
	258	\| _ => NONE)
	259	bio)
	260	\| 23 => Option.map MsgSaQuery (OpenSSL.readString bio)
	261	\| 24 => Option.map MsgSaStatus (recvBool bio)
	262	\| 25 => (case (OpenSSL.readString bio, recvBool bio) of
	263	(SOME user, SOME b) => SOME (MsgSaSet (user, b))
	264	\| _ => NONE)
	265	\| 26 => Option.map MsgSmtpLogReq (OpenSSL.readString bio)
	266	\| 27 => Option.map MsgSmtpLogRes (OpenSSL.readString bio)
	267	\| 28 => (case (OpenSSL.readString bio, OpenSSL.readString bio) of
	268	(SOME dbtype, SOME passwd) =>
	269	SOME (MsgDbPasswd {dbtype = dbtype, passwd = passwd})
	270	\| _ => NONE)
	271	\| 29 => SOME MsgShutdown
	272	\| 30 => SOME MsgYes
	273	\| 31 => SOME MsgNo
	274	\| 32 => Option.map MsgApt (OpenSSL.readString bio)
	275	\| _ => NONE)
	276
	277	end