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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 | |
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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 | |
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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) |
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58 | | MsgGrant acl => (OpenSSL.writeInt (bio, 6); |
59 | sendAcl (bio, acl)) |
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60 | | MsgRevoke acl => (OpenSSL.writeInt (bio, 7); |
61 | sendAcl (bio, acl)) |
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62 | | MsgListPerms user => (OpenSSL.writeInt (bio, 8); |
63 | OpenSSL.writeString (bio, user)) |
64 | | MsgPerms classes => (OpenSSL.writeInt (bio, 9); |
65 | app (fn (class, values) => |
66 | (OpenSSL.writeInt (bio, 1); |
67 | OpenSSL.writeString (bio, class); |
68 | app (fn value => |
69 | (OpenSSL.writeInt (bio, 1); |
70 | OpenSSL.writeString (bio, value))) values; |
71 | OpenSSL.writeInt (bio, 0))) classes; |
72 | OpenSSL.writeInt (bio, 0)) |
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73 | | MsgWhoHas {class, value} => (OpenSSL.writeInt (bio, 10); |
74 | OpenSSL.writeString (bio, class); |
75 | OpenSSL.writeString (bio, value)) |
76 | | MsgWhoHasResponse users => (OpenSSL.writeInt (bio, 11); |
77 | app (fn user => |
78 | (OpenSSL.writeInt (bio, 1); |
79 | OpenSSL.writeString (bio, user))) users; |
80 | OpenSSL.writeInt (bio, 0)) |
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81 | |
82 | fun checkIt v = |
83 | case v of |
84 | NONE => raise OpenSSL.OpenSSL "Bad Msg format" |
85 | | _ => v |
86 | |
87 | fun recv bio = |
88 | case OpenSSL.readInt bio of |
89 | NONE => NONE |
90 | | SOME n => |
91 | checkIt (case n of |
92 | 1 => SOME MsgOk |
93 | | 2 => Option.map MsgError (OpenSSL.readString bio) |
94 | | 3 => Option.map MsgConfig (OpenSSL.readString bio) |
95 | | 4 => (case (OpenSSL.readInt bio, |
96 | OpenSSL.readString bio, |
97 | OpenSSL.readString bio, |
98 | OpenSSL.readString bio) of |
99 | (SOME action, SOME domain, SOME dir, SOME file) => |
100 | SOME (MsgFile {action = i2a action, |
101 | domain = domain, |
102 | dir = dir, |
103 | file = file}) |
104 | | _ => NONE) |
105 | | 5 => SOME MsgDoFiles |
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106 | | 6 => (case recvAcl bio of |
107 | SOME acl => SOME (MsgGrant acl) |
108 | | _ => NONE) |
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109 | | 7 => (case recvAcl bio of |
110 | SOME acl => SOME (MsgRevoke acl) |
111 | | _ => NONE) |
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112 | | 8 => (case OpenSSL.readString bio of |
113 | SOME user => SOME (MsgListPerms user) |
114 | | _ => NONE) |
115 | | 9 => let |
116 | fun loop classes = |
117 | case OpenSSL.readInt bio of |
118 | SOME 0 => SOME (MsgPerms (rev classes)) |
119 | | SOME 1 => |
120 | (case OpenSSL.readString bio of |
121 | SOME class => |
122 | let |
123 | fun loop' values = |
124 | case OpenSSL.readInt bio of |
125 | SOME 0 => loop ((class, rev values) :: classes) |
126 | | SOME 1 => |
127 | (case OpenSSL.readString bio of |
128 | SOME value => loop' (value :: values) |
129 | | NONE => NONE) |
130 | | _ => NONE |
131 | in |
132 | loop' [] |
133 | end |
134 | | NONE => NONE) |
135 | | _ => NONE |
136 | in |
137 | loop [] |
138 | end |
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139 | | 10 => (case (OpenSSL.readString bio, OpenSSL.readString bio) of |
140 | (SOME class, SOME value) => SOME (MsgWhoHas {class = class, value = value}) |
141 | | _ => NONE) |
142 | | 11 => let |
143 | fun loop users = |
144 | case OpenSSL.readInt bio of |
145 | SOME 0 => SOME (MsgWhoHasResponse (rev users)) |
146 | | SOME 1 => |
147 | (case OpenSSL.readString bio of |
148 | SOME user => loop (user :: users) |
149 | | NONE => NONE) |
150 | | _ => NONE |
151 | in |
152 | loop [] |
153 | end |
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154 | | _ => NONE) |
155 | |
156 | end |