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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 | (* BIND DNS *) | |
20 | ||
21 | structure Bind :> BIND = struct | |
22 | ||
23 | open Ast | |
24 | ||
25 | val namedChanged = ref false | |
26 | val zoneChanged = ref false | |
27 | ||
28 | val didDomain = ref "" | |
29 | ||
30 | val () = Slave.registerPreHandler (fn () => (namedChanged := false; | |
31 | zoneChanged := false; | |
32 | didDomain := "")) | |
33 | ||
34 | val dns : TextIO.outstream option ref = ref NONE | |
35 | fun dnsF () = valOf (!dns) | |
36 | ||
37 | fun write s = TextIO.output (dnsF (), s) | |
38 | ||
39 | val _ = Domain.registerBefore | |
40 | (fn _ => dns := SOME (Domain.domainFile "dns")) | |
41 | ||
42 | val _ = Domain.registerAfter | |
43 | (fn _ => TextIO.closeOut (dnsF ())) | |
44 | ||
45 | val dl = ErrorMsg.dummyLoc | |
46 | ||
47 | datatype dns_record = | |
48 | A of string * string | |
49 | | CNAME of string * string | |
50 | | MX of int * string | |
51 | | NS of string | |
52 | ||
53 | val record = fn (EApp ((EApp ((EVar "dnsA", _), e1), _), e2), _) => | |
54 | (case (Env.string e1, Env.string e2) of | |
55 | (SOME v1, SOME v2) => SOME (A (v1, v2)) | |
56 | | _ => NONE) | |
57 | | (EApp ((EApp ((EVar "dnsCNAME", _), e1), _), e2), _) => | |
58 | (case (Env.string e1, Env.string e2) of | |
59 | (SOME v1, SOME v2) => SOME (CNAME (v1, v2)) | |
60 | | _ => NONE) | |
61 | | (EApp ((EApp ((EVar "dnsMX", _), e1), _), e2), _) => | |
62 | (case (Env.int e1, Env.string e2) of | |
63 | (SOME v1, SOME v2) => SOME (MX (v1, v2)) | |
64 | | _ => NONE) | |
65 | | (EApp ((EVar "dnsNS", _), e), _) => | |
66 | Option.map NS (Env.string e) | |
67 | | _ => NONE | |
68 | ||
69 | fun writeRecord (evs, r) = | |
70 | let | |
71 | val ttl = Env.env Env.int (evs, "TTL") | |
72 | in | |
73 | case r of | |
74 | A (from, to) => (write from; | |
75 | write "."; | |
76 | write (Domain.currentDomain ()); | |
77 | write ".\t"; | |
78 | write (Int.toString ttl); | |
79 | write "\tIN\tA\t"; | |
80 | write to; | |
81 | write "\n") | |
82 | | CNAME (from, to) => (write from; | |
83 | write "."; | |
84 | write (Domain.currentDomain ()); | |
85 | write ".\t"; | |
86 | write (Int.toString ttl); | |
87 | write "\tIN\tCNAME\t"; | |
88 | write to; | |
89 | write ".\n") | |
90 | | MX (num, host) => (write "\t"; | |
91 | write (Int.toString ttl); | |
92 | write "\tIN\tMX\t"; | |
93 | write (Int.toString num); | |
94 | write "\t"; | |
95 | write host; | |
96 | write ".\n") | |
97 | | NS host => (write "\t"; | |
98 | write (Int.toString ttl); | |
99 | write "\tIN\tNS\t"; | |
100 | write host; | |
101 | write ".\n") | |
102 | end | |
103 | ||
104 | val () = Env.actionV_one "dns" | |
105 | ("record", record) | |
106 | writeRecord | |
107 | ||
108 | fun readLine inf = | |
109 | case TextIO.inputLine inf of | |
110 | NONE => raise Fail "Expected a line for BIND" | |
111 | | SOME s => String.substring (s, 0, size s - 1) | |
112 | ||
113 | fun readILine inf = valOf (Int.fromString (readLine inf)) | |
114 | ||
115 | val () = Slave.registerFileHandler (fn fs => | |
116 | let | |
117 | val {dir, file} = OS.Path.splitDirFile (#file fs) | |
118 | ||
119 | fun dnsChanged () = | |
120 | if #domain fs = !didDomain then | |
121 | () | |
122 | else if #action fs = Slave.Delete then | |
123 | let | |
124 | val fname = OS.Path.joinBaseExt {base = #domain fs, | |
125 | ext = SOME "zone"} | |
126 | val fname = OS.Path.joinDirFile {dir = Config.Bind.zonePath, | |
127 | file = fname} | |
128 | in | |
129 | OS.FileSys.remove fname | |
130 | end | |
131 | else | |
132 | let | |
133 | val inf = TextIO.openIn (OS.Path.joinDirFile {dir = #dir fs, | |
134 | file = "soa"}) | |
135 | val kind = readLine inf | |
136 | val ttl = readILine inf | |
137 | val ns = readLine inf | |
138 | val serial = case readLine inf of | |
139 | "" => NONE | |
140 | | s => Int.fromString s | |
141 | val rf = readILine inf | |
142 | val ret = readILine inf | |
143 | val exp = readILine inf | |
144 | val min = readILine inf | |
145 | val () = TextIO.closeIn inf | |
146 | ||
147 | val dns = OS.Path.joinDirFile {dir = #dir fs, | |
148 | file = "dns"} | |
149 | ||
150 | val fname = OS.Path.joinBaseExt {base = #domain fs, | |
151 | ext = SOME "zone"} | |
152 | val fname = OS.Path.joinDirFile {dir = Config.Bind.zonePath, | |
153 | file = fname} | |
154 | ||
155 | val outf = TextIO.openOut fname | |
156 | in | |
157 | zoneChanged := true; | |
158 | TextIO.output (outf, "$TTL "); | |
159 | TextIO.output (outf, Int.toString ttl); | |
160 | TextIO.output (outf, "\n\n@\tIN\tSOA\t"); | |
161 | TextIO.output (outf, ns); | |
162 | TextIO.output (outf, ".\thostmaster."); | |
163 | TextIO.output (outf, #domain fs); | |
164 | TextIO.output (outf, ".\n( "); | |
165 | TextIO.output (outf, Int.toString 123456789); | |
166 | TextIO.output (outf, " "); | |
167 | TextIO.output (outf, Int.toString rf); | |
168 | TextIO.output (outf, " "); | |
169 | TextIO.output (outf, Int.toString ret); | |
170 | TextIO.output (outf, " "); | |
171 | TextIO.output (outf, Int.toString exp); | |
172 | TextIO.output (outf, " "); | |
173 | TextIO.output (outf, Int.toString min); | |
174 | TextIO.output (outf, " )\n\n"); | |
175 | TextIO.closeOut outf; | |
176 | Slave.shellF ([Config.cat, " ", dns, " >>", fname], | |
177 | fn cl => "Error concatenating file: " ^ cl); | |
178 | didDomain := #domain fs | |
179 | end | |
180 | in | |
181 | case file of | |
182 | "soa" => dnsChanged () | |
183 | | "dns" => dnsChanged () | |
184 | | "named.conf" => namedChanged := true | |
185 | | _ => () | |
186 | end) | |
187 | ||
188 | val () = Slave.registerPostHandler | |
189 | (fn () => | |
190 | (if !namedChanged then | |
191 | Slave.concatTo (fn s => s = "named.conf") Config.Bind.namedConf | |
192 | else | |
193 | (); | |
194 | if !namedChanged orelse !zoneChanged then | |
195 | Slave.shellF ([Config.Bind.reload], | |
196 | fn cl => "Error reloading bind with " ^ cl) | |
197 | else | |
198 | ())) | |
199 | end |