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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 |