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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 | |
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35 | |
36 | val _ = Domain.registerBefore | |
e0b0abd2 AC |
37 | (fn _ => dns := Option.map (fn node => Domain.domainFile {node = node, |
38 | name = "dns"}) | |
39 | (Domain.dnsMaster ())) | |
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40 | |
41 | val _ = Domain.registerAfter | |
e0b0abd2 | 42 | (fn _ => Option.app TextIO.closeOut (!dns)) |
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43 | |
44 | val dl = ErrorMsg.dummyLoc | |
45 | ||
46 | datatype dns_record = | |
47 | A of string * string | |
48 | | CNAME of string * string | |
49 | | MX of int * string | |
50 | | NS of string | |
51 | ||
52 | val record = fn (EApp ((EApp ((EVar "dnsA", _), e1), _), e2), _) => | |
53 | (case (Env.string e1, Env.string e2) of | |
54 | (SOME v1, SOME v2) => SOME (A (v1, v2)) | |
55 | | _ => NONE) | |
56 | | (EApp ((EApp ((EVar "dnsCNAME", _), e1), _), e2), _) => | |
57 | (case (Env.string e1, Env.string e2) of | |
58 | (SOME v1, SOME v2) => SOME (CNAME (v1, v2)) | |
59 | | _ => NONE) | |
60 | | (EApp ((EApp ((EVar "dnsMX", _), e1), _), e2), _) => | |
61 | (case (Env.int e1, Env.string e2) of | |
62 | (SOME v1, SOME v2) => SOME (MX (v1, v2)) | |
63 | | _ => NONE) | |
64 | | (EApp ((EVar "dnsNS", _), e), _) => | |
65 | Option.map NS (Env.string e) | |
66 | | _ => NONE | |
67 | ||
68 | fun writeRecord (evs, r) = | |
e0b0abd2 AC |
69 | case !dns of |
70 | NONE => print "Warning: DNS directive ignored because no master DNS server is configured for this domain\n" | |
71 | | SOME file => | |
72 | let | |
73 | fun write s = TextIO.output (file, s) | |
74 | val ttl = Env.env Env.int (evs, "TTL") | |
75 | in | |
76 | case r of | |
77 | A (from, to) => (write from; | |
6ae327f8 AC |
78 | write "."; |
79 | write (Domain.currentDomain ()); | |
80 | write ".\t"; | |
81 | write (Int.toString ttl); | |
e0b0abd2 | 82 | write "\tIN\tA\t"; |
6ae327f8 | 83 | write to; |
e0b0abd2 AC |
84 | write "\n") |
85 | | CNAME (from, to) => (write from; | |
86 | write "."; | |
87 | write (Domain.currentDomain ()); | |
88 | write ".\t"; | |
89 | write (Int.toString ttl); | |
90 | write "\tIN\tCNAME\t"; | |
91 | write to; | |
92 | write ".\n") | |
93 | | MX (num, host) => (write "\t"; | |
94 | write (Int.toString ttl); | |
95 | write "\tIN\tMX\t"; | |
96 | write (Int.toString num); | |
97 | write "\t"; | |
98 | write host; | |
99 | write ".\n") | |
100 | | NS host => (write "\t"; | |
101 | write (Int.toString ttl); | |
102 | write "\tIN\tNS\t"; | |
103 | write host; | |
104 | write ".\n") | |
105 | end | |
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106 | |
107 | val () = Env.actionV_one "dns" | |
108 | ("record", record) | |
109 | writeRecord | |
110 | ||
111 | fun readLine inf = | |
112 | case TextIO.inputLine inf of | |
113 | NONE => raise Fail "Expected a line for BIND" | |
114 | | SOME s => String.substring (s, 0, size s - 1) | |
115 | ||
116 | fun readILine inf = valOf (Int.fromString (readLine inf)) | |
117 | ||
118 | val () = Slave.registerFileHandler (fn fs => | |
119 | let | |
120 | val {dir, file} = OS.Path.splitDirFile (#file fs) | |
121 | ||
122 | fun dnsChanged () = | |
123 | if #domain fs = !didDomain then | |
124 | () | |
125 | else if #action fs = Slave.Delete then | |
126 | let | |
127 | val fname = OS.Path.joinBaseExt {base = #domain fs, | |
128 | ext = SOME "zone"} | |
129 | val fname = OS.Path.joinDirFile {dir = Config.Bind.zonePath, | |
130 | file = fname} | |
131 | in | |
132 | OS.FileSys.remove fname | |
133 | end | |
134 | else | |
135 | let | |
136 | val inf = TextIO.openIn (OS.Path.joinDirFile {dir = #dir fs, | |
137 | file = "soa"}) | |
138 | val kind = readLine inf | |
139 | val ttl = readILine inf | |
140 | val ns = readLine inf | |
141 | val serial = case readLine inf of | |
142 | "" => NONE | |
143 | | s => Int.fromString s | |
144 | val rf = readILine inf | |
145 | val ret = readILine inf | |
146 | val exp = readILine inf | |
147 | val min = readILine inf | |
148 | val () = TextIO.closeIn inf | |
149 | ||
150 | val dns = OS.Path.joinDirFile {dir = #dir fs, | |
151 | file = "dns"} | |
152 | ||
153 | val fname = OS.Path.joinBaseExt {base = #domain fs, | |
154 | ext = SOME "zone"} | |
155 | val fname = OS.Path.joinDirFile {dir = Config.Bind.zonePath, | |
156 | file = fname} | |
157 | ||
158 | val outf = TextIO.openOut fname | |
159 | in | |
160 | zoneChanged := true; | |
161 | TextIO.output (outf, "$TTL "); | |
162 | TextIO.output (outf, Int.toString ttl); | |
163 | TextIO.output (outf, "\n\n@\tIN\tSOA\t"); | |
164 | TextIO.output (outf, ns); | |
165 | TextIO.output (outf, ".\thostmaster."); | |
166 | TextIO.output (outf, #domain fs); | |
167 | TextIO.output (outf, ".\n( "); | |
168 | TextIO.output (outf, Int.toString 123456789); | |
169 | TextIO.output (outf, " "); | |
170 | TextIO.output (outf, Int.toString rf); | |
171 | TextIO.output (outf, " "); | |
172 | TextIO.output (outf, Int.toString ret); | |
173 | TextIO.output (outf, " "); | |
174 | TextIO.output (outf, Int.toString exp); | |
175 | TextIO.output (outf, " "); | |
176 | TextIO.output (outf, Int.toString min); | |
177 | TextIO.output (outf, " )\n\n"); | |
178 | TextIO.closeOut outf; | |
179 | Slave.shellF ([Config.cat, " ", dns, " >>", fname], | |
180 | fn cl => "Error concatenating file: " ^ cl); | |
181 | didDomain := #domain fs | |
182 | end | |
183 | in | |
184 | case file of | |
185 | "soa" => dnsChanged () | |
186 | | "dns" => dnsChanged () | |
187 | | "named.conf" => namedChanged := true | |
188 | | _ => () | |
189 | end) | |
190 | ||
191 | val () = Slave.registerPostHandler | |
192 | (fn () => | |
193 | (if !namedChanged then | |
194 | Slave.concatTo (fn s => s = "named.conf") Config.Bind.namedConf | |
195 | else | |
196 | (); | |
197 | if !namedChanged orelse !zoneChanged then | |
198 | Slave.shellF ([Config.Bind.reload], | |
199 | fn cl => "Error reloading bind with " ^ cl) | |
200 | else | |
201 | ())) | |
202 | end |