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6ae327f8 AC |
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 | ||
fa3b6b87 | 34 | val dns : Domain.files option ref = ref NONE |
6ae327f8 AC |
35 | |
36 | val _ = Domain.registerBefore | |
fa3b6b87 AC |
37 | (fn _ => dns := Option.map (fn node => Domain.domainsFile {node = node, |
38 | name = "dns"}) | |
e0b0abd2 | 39 | (Domain.dnsMaster ())) |
6ae327f8 AC |
40 | |
41 | val _ = Domain.registerAfter | |
fa3b6b87 | 42 | (fn _ => (Option.app (fn files => #close files ()) (!dns); |
325285ab | 43 | dns := NONE)) |
6ae327f8 AC |
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 | |
6eeb3bf9 | 52 | | DefaultA of string |
6ae327f8 AC |
53 | |
54 | val record = fn (EApp ((EApp ((EVar "dnsA", _), e1), _), e2), _) => | |
97665758 | 55 | (case (Env.string e1, Domain.ip e2) of |
6ae327f8 AC |
56 | (SOME v1, SOME v2) => SOME (A (v1, v2)) |
57 | | _ => NONE) | |
58 | | (EApp ((EApp ((EVar "dnsCNAME", _), e1), _), e2), _) => | |
59 | (case (Env.string e1, Env.string e2) of | |
60 | (SOME v1, SOME v2) => SOME (CNAME (v1, v2)) | |
61 | | _ => NONE) | |
62 | | (EApp ((EApp ((EVar "dnsMX", _), e1), _), e2), _) => | |
63 | (case (Env.int e1, Env.string e2) of | |
64 | (SOME v1, SOME v2) => SOME (MX (v1, v2)) | |
65 | | _ => NONE) | |
66 | | (EApp ((EVar "dnsNS", _), e), _) => | |
67 | Option.map NS (Env.string e) | |
6eeb3bf9 AC |
68 | | (EApp ((EVar "dnsDefaultA", _), e), _) => |
69 | Option.map DefaultA (Env.string e) | |
6ae327f8 AC |
70 | | _ => NONE |
71 | ||
72 | fun writeRecord (evs, r) = | |
e0b0abd2 AC |
73 | case !dns of |
74 | NONE => print "Warning: DNS directive ignored because no master DNS server is configured for this domain\n" | |
fa3b6b87 | 75 | | SOME files => |
e0b0abd2 | 76 | let |
fa3b6b87 AC |
77 | fun write s = #write files s |
78 | fun writeDom () = #writeDom files () | |
e0b0abd2 AC |
79 | val ttl = Env.env Env.int (evs, "TTL") |
80 | in | |
81 | case r of | |
82 | A (from, to) => (write from; | |
6ae327f8 | 83 | write "."; |
fa3b6b87 | 84 | writeDom (); |
6ae327f8 AC |
85 | write ".\t"; |
86 | write (Int.toString ttl); | |
e0b0abd2 | 87 | write "\tIN\tA\t"; |
6ae327f8 | 88 | write to; |
e0b0abd2 | 89 | write "\n") |
6eeb3bf9 AC |
90 | | DefaultA to => (writeDom (); |
91 | write ".\t"; | |
92 | write (Int.toString ttl); | |
93 | write "\tIN\tA\t"; | |
94 | write to; | |
95 | write "\n") | |
e0b0abd2 AC |
96 | | CNAME (from, to) => (write from; |
97 | write "."; | |
fa3b6b87 | 98 | writeDom (); |
e0b0abd2 AC |
99 | write ".\t"; |
100 | write (Int.toString ttl); | |
101 | write "\tIN\tCNAME\t"; | |
102 | write to; | |
103 | write ".\n") | |
ec554091 AC |
104 | | MX (num, host) => (writeDom (); |
105 | write ".\t"; | |
e0b0abd2 AC |
106 | write (Int.toString ttl); |
107 | write "\tIN\tMX\t"; | |
108 | write (Int.toString num); | |
109 | write "\t"; | |
110 | write host; | |
111 | write ".\n") | |
ec554091 AC |
112 | | NS host => (writeDom (); |
113 | write ".\t"; | |
e0b0abd2 AC |
114 | write (Int.toString ttl); |
115 | write "\tIN\tNS\t"; | |
116 | write host; | |
117 | write ".\n") | |
118 | end | |
6ae327f8 AC |
119 | |
120 | val () = Env.actionV_one "dns" | |
121 | ("record", record) | |
122 | writeRecord | |
123 | ||
124 | fun readLine inf = | |
125 | case TextIO.inputLine inf of | |
126 | NONE => raise Fail "Expected a line for BIND" | |
127 | | SOME s => String.substring (s, 0, size s - 1) | |
128 | ||
129 | fun readILine inf = valOf (Int.fromString (readLine inf)) | |
130 | ||
3f07a40e AC |
131 | val monthToInt = fn Date.Jan => 1 |
132 | | Date.Feb => 2 | |
133 | | Date.Mar => 3 | |
134 | | Date.Apr => 4 | |
135 | | Date.May => 5 | |
136 | | Date.Jun => 6 | |
137 | | Date.Jul => 7 | |
138 | | Date.Aug => 8 | |
139 | | Date.Sep => 9 | |
140 | | Date.Oct => 10 | |
141 | | Date.Nov => 11 | |
142 | | Date.Dec => 12 | |
143 | ||
144 | fun padBy ch amt s = | |
145 | if size s < amt then | |
82a0d609 | 146 | CharVector.tabulate (amt - size s, fn _ => ch) ^ s |
3f07a40e AC |
147 | else |
148 | s | |
149 | ||
150 | fun dateString () = | |
151 | let | |
152 | val date = Date.fromTimeUniv (Time.now ()) | |
153 | in | |
154 | padBy #"0" 4 (Int.toString (Date.year date)) | |
155 | ^ padBy #"0" 2 (Int.toString (monthToInt (Date.month date))) | |
156 | ^ padBy #"0" 2 (Int.toString (Date.day date)) | |
157 | end | |
158 | ||
6ae327f8 AC |
159 | val () = Slave.registerFileHandler (fn fs => |
160 | let | |
161 | val {dir, file} = OS.Path.splitDirFile (#file fs) | |
162 | ||
163 | fun dnsChanged () = | |
164 | if #domain fs = !didDomain then | |
165 | () | |
1638d5a2 | 166 | else if Slave.isDelete (#action fs) then |
6ae327f8 AC |
167 | let |
168 | val fname = OS.Path.joinBaseExt {base = #domain fs, | |
169 | ext = SOME "zone"} | |
170 | val fname = OS.Path.joinDirFile {dir = Config.Bind.zonePath, | |
171 | file = fname} | |
172 | in | |
325285ab AC |
173 | Slave.shellF ([Config.rm, " -f ", fname], |
174 | fn cl => "Error deleting file: " ^ cl) | |
6ae327f8 AC |
175 | end |
176 | else | |
177 | let | |
178 | val inf = TextIO.openIn (OS.Path.joinDirFile {dir = #dir fs, | |
179 | file = "soa"}) | |
180 | val kind = readLine inf | |
181 | val ttl = readILine inf | |
182 | val ns = readLine inf | |
183 | val serial = case readLine inf of | |
184 | "" => NONE | |
185 | | s => Int.fromString s | |
186 | val rf = readILine inf | |
187 | val ret = readILine inf | |
188 | val exp = readILine inf | |
189 | val min = readILine inf | |
190 | val () = TextIO.closeIn inf | |
191 | ||
82a0d609 AC |
192 | val serialPath = OS.Path.joinDirFile {dir = Config.serialDir, |
193 | file = #domain fs} | |
194 | ||
3f07a40e | 195 | val oldSerial = let |
82a0d609 | 196 | val inf = TextIO.openIn serialPath |
3f07a40e AC |
197 | in |
198 | SOME (readLine inf) | |
199 | before TextIO.closeIn inf | |
82a0d609 | 200 | end handle IO.Io {name, ...} => NONE |
3f07a40e AC |
201 | |
202 | val newSerial = | |
203 | case serial of | |
204 | SOME n => Int.toString n | |
205 | | NONE => | |
206 | let | |
207 | val prefix = dateString () | |
208 | in | |
209 | prefix | |
210 | ^ (case oldSerial of | |
211 | NONE => "00" | |
212 | | SOME old => | |
213 | if size old >= 8 andalso | |
214 | String.substring (old, 0, 8) = prefix then | |
215 | case Int.fromString (String.extract (old, 8, NONE)) of | |
216 | NONE => "00" | |
217 | | SOME old => padBy #"0" 2 (Int.toString (old+1)) | |
218 | else | |
219 | "00") | |
220 | end | |
221 | ||
82a0d609 | 222 | val outf = TextIO.openOut serialPath |
3f07a40e AC |
223 | val _ = TextIO.output (outf, newSerial) |
224 | val _ = TextIO.closeOut outf | |
225 | ||
6ae327f8 AC |
226 | val dns = OS.Path.joinDirFile {dir = #dir fs, |
227 | file = "dns"} | |
228 | ||
229 | val fname = OS.Path.joinBaseExt {base = #domain fs, | |
230 | ext = SOME "zone"} | |
231 | val fname = OS.Path.joinDirFile {dir = Config.Bind.zonePath, | |
232 | file = fname} | |
233 | ||
234 | val outf = TextIO.openOut fname | |
235 | in | |
236 | zoneChanged := true; | |
237 | TextIO.output (outf, "$TTL "); | |
238 | TextIO.output (outf, Int.toString ttl); | |
239 | TextIO.output (outf, "\n\n@\tIN\tSOA\t"); | |
240 | TextIO.output (outf, ns); | |
241 | TextIO.output (outf, ".\thostmaster."); | |
242 | TextIO.output (outf, #domain fs); | |
722e651b | 243 | TextIO.output (outf, ". ( "); |
3f07a40e | 244 | TextIO.output (outf, newSerial); |
6ae327f8 AC |
245 | TextIO.output (outf, " "); |
246 | TextIO.output (outf, Int.toString rf); | |
247 | TextIO.output (outf, " "); | |
248 | TextIO.output (outf, Int.toString ret); | |
249 | TextIO.output (outf, " "); | |
250 | TextIO.output (outf, Int.toString exp); | |
251 | TextIO.output (outf, " "); | |
252 | TextIO.output (outf, Int.toString min); | |
253 | TextIO.output (outf, " )\n\n"); | |
254 | TextIO.closeOut outf; | |
325285ab AC |
255 | if Posix.FileSys.access (dns, []) then |
256 | Slave.shellF ([Config.cat, " ", dns, " >>", fname], | |
257 | fn cl => "Error concatenating file: " ^ cl) | |
258 | else | |
259 | (); | |
6ae327f8 AC |
260 | didDomain := #domain fs |
261 | end | |
262 | in | |
263 | case file of | |
264 | "soa" => dnsChanged () | |
265 | | "dns" => dnsChanged () | |
266 | | "named.conf" => namedChanged := true | |
267 | | _ => () | |
268 | end) | |
269 | ||
270 | val () = Slave.registerPostHandler | |
271 | (fn () => | |
272 | (if !namedChanged then | |
273 | Slave.concatTo (fn s => s = "named.conf") Config.Bind.namedConf | |
274 | else | |
275 | (); | |
276 | if !namedChanged orelse !zoneChanged then | |
277 | Slave.shellF ([Config.Bind.reload], | |
278 | fn cl => "Error reloading bind with " ^ cl) | |
279 | else | |
280 | ())) | |
71420f8b AC |
281 | |
282 | val () = Domain.registerResetLocal (fn () => | |
283 | ignore (OS.Process.system (Config.rm ^ " -rf /var/domtool/zones/*"))) | |
284 | ||
41c58daf AC |
285 | val () = Domain.registerDescriber (Domain.considerAll |
286 | [Domain.Filename {filename = "named.conf", | |
287 | heading = "named.conf addition", | |
288 | showEmpty = false}, | |
289 | Domain.Filename {filename = "dns", | |
290 | heading = "DNS zonefile contents", | |
291 | showEmpty = false}]) | |
292 | ||
6ae327f8 | 293 | end |