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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 |
090692f7 AC |
53 | | AAAA of string * string |
54 | | DefaultAAAA of string | |
f2cf641d | 55 | | TXT of string * string |
6ae327f8 AC |
56 | |
57 | val record = fn (EApp ((EApp ((EVar "dnsA", _), e1), _), e2), _) => | |
97665758 | 58 | (case (Env.string e1, Domain.ip e2) of |
6ae327f8 AC |
59 | (SOME v1, SOME v2) => SOME (A (v1, v2)) |
60 | | _ => NONE) | |
61 | | (EApp ((EApp ((EVar "dnsCNAME", _), e1), _), e2), _) => | |
62 | (case (Env.string e1, Env.string e2) of | |
63 | (SOME v1, SOME v2) => SOME (CNAME (v1, v2)) | |
64 | | _ => NONE) | |
65 | | (EApp ((EApp ((EVar "dnsMX", _), e1), _), e2), _) => | |
66 | (case (Env.int e1, Env.string e2) of | |
67 | (SOME v1, SOME v2) => SOME (MX (v1, v2)) | |
68 | | _ => NONE) | |
69 | | (EApp ((EVar "dnsNS", _), e), _) => | |
70 | Option.map NS (Env.string e) | |
6eeb3bf9 | 71 | | (EApp ((EVar "dnsDefaultA", _), e), _) => |
090692f7 AC |
72 | Option.map DefaultA (Domain.ip e) |
73 | | (EApp ((EApp ((EVar "dnsAAAA", _), e1), _), e2), _) => | |
74 | (case (Env.string e1, Env.string e2) of | |
75 | (SOME v1, SOME v2) => SOME (AAAA (v1, v2)) | |
76 | | _ => NONE) | |
77 | | (EApp ((EVar "dnsDefaultAAAA", _), e), _) => | |
78 | Option.map DefaultAAAA (Env.string e) | |
f2cf641d AC |
79 | | (EApp ((EApp ((EVar "dnsTXT", _), e1), _), e2), _) => |
80 | (case (Env.string e1, Env.string e2) of | |
81 | (SOME v1, SOME v2) => SOME (TXT (v1, v2)) | |
82 | | _ => NONE) | |
6ae327f8 AC |
83 | | _ => NONE |
84 | ||
85 | fun writeRecord (evs, r) = | |
e0b0abd2 | 86 | case !dns of |
cf283351 AC |
87 | NONE => print ("Warning: DNS directive for " ^ Domain.currentDomain () |
88 | ^ " ignored because no master DNS server is configured for this domain\n") | |
fa3b6b87 | 89 | | SOME files => |
e0b0abd2 | 90 | let |
fa3b6b87 AC |
91 | fun write s = #write files s |
92 | fun writeDom () = #writeDom files () | |
e0b0abd2 AC |
93 | val ttl = Env.env Env.int (evs, "TTL") |
94 | in | |
95 | case r of | |
96 | A (from, to) => (write from; | |
6ae327f8 | 97 | write "."; |
fa3b6b87 | 98 | writeDom (); |
6ae327f8 AC |
99 | write ".\t"; |
100 | write (Int.toString ttl); | |
e0b0abd2 | 101 | write "\tIN\tA\t"; |
6ae327f8 | 102 | write to; |
e0b0abd2 | 103 | write "\n") |
6eeb3bf9 AC |
104 | | DefaultA to => (writeDom (); |
105 | write ".\t"; | |
106 | write (Int.toString ttl); | |
107 | write "\tIN\tA\t"; | |
108 | write to; | |
109 | write "\n") | |
e0b0abd2 AC |
110 | | CNAME (from, to) => (write from; |
111 | write "."; | |
fa3b6b87 | 112 | writeDom (); |
e0b0abd2 AC |
113 | write ".\t"; |
114 | write (Int.toString ttl); | |
115 | write "\tIN\tCNAME\t"; | |
116 | write to; | |
117 | write ".\n") | |
ec554091 AC |
118 | | MX (num, host) => (writeDom (); |
119 | write ".\t"; | |
e0b0abd2 AC |
120 | write (Int.toString ttl); |
121 | write "\tIN\tMX\t"; | |
122 | write (Int.toString num); | |
123 | write "\t"; | |
124 | write host; | |
125 | write ".\n") | |
ec554091 AC |
126 | | NS host => (writeDom (); |
127 | write ".\t"; | |
e0b0abd2 AC |
128 | write (Int.toString ttl); |
129 | write "\tIN\tNS\t"; | |
130 | write host; | |
131 | write ".\n") | |
090692f7 AC |
132 | | AAAA (from, to) => (write from; |
133 | write "."; | |
134 | writeDom (); | |
135 | write ".\t"; | |
136 | write (Int.toString ttl); | |
137 | write "\tIN\tAAAA\t"; | |
138 | write to; | |
139 | write "\n") | |
140 | | DefaultAAAA to => (writeDom (); | |
141 | write ".\t"; | |
142 | write (Int.toString ttl); | |
143 | write "\tIN\tAAAA\t"; | |
144 | write to; | |
145 | write "\n") | |
f2cf641d AC |
146 | | TXT (from, to) => (write from; |
147 | write "."; | |
148 | writeDom (); | |
149 | write ".\t"; | |
150 | write (Int.toString ttl); | |
151 | write "\tIN\tTXT\t\""; | |
152 | write (String.translate (fn #"\"" => "\\\"" | ch => str ch) to); | |
153 | write "\"\n") | |
e0b0abd2 | 154 | end |
6ae327f8 AC |
155 | |
156 | val () = Env.actionV_one "dns" | |
157 | ("record", record) | |
158 | writeRecord | |
159 | ||
160 | fun readLine inf = | |
161 | case TextIO.inputLine inf of | |
162 | NONE => raise Fail "Expected a line for BIND" | |
163 | | SOME s => String.substring (s, 0, size s - 1) | |
164 | ||
165 | fun readILine inf = valOf (Int.fromString (readLine inf)) | |
166 | ||
3f07a40e AC |
167 | val monthToInt = fn Date.Jan => 1 |
168 | | Date.Feb => 2 | |
169 | | Date.Mar => 3 | |
170 | | Date.Apr => 4 | |
171 | | Date.May => 5 | |
172 | | Date.Jun => 6 | |
173 | | Date.Jul => 7 | |
174 | | Date.Aug => 8 | |
175 | | Date.Sep => 9 | |
176 | | Date.Oct => 10 | |
177 | | Date.Nov => 11 | |
178 | | Date.Dec => 12 | |
179 | ||
180 | fun padBy ch amt s = | |
181 | if size s < amt then | |
82a0d609 | 182 | CharVector.tabulate (amt - size s, fn _ => ch) ^ s |
3f07a40e AC |
183 | else |
184 | s | |
185 | ||
186 | fun dateString () = | |
187 | let | |
188 | val date = Date.fromTimeUniv (Time.now ()) | |
189 | in | |
190 | padBy #"0" 4 (Int.toString (Date.year date)) | |
191 | ^ padBy #"0" 2 (Int.toString (monthToInt (Date.month date))) | |
192 | ^ padBy #"0" 2 (Int.toString (Date.day date)) | |
193 | end | |
194 | ||
6ae327f8 AC |
195 | val () = Slave.registerFileHandler (fn fs => |
196 | let | |
197 | val {dir, file} = OS.Path.splitDirFile (#file fs) | |
198 | ||
199 | fun dnsChanged () = | |
200 | if #domain fs = !didDomain then | |
201 | () | |
1638d5a2 | 202 | else if Slave.isDelete (#action fs) then |
6ae327f8 AC |
203 | let |
204 | val fname = OS.Path.joinBaseExt {base = #domain fs, | |
205 | ext = SOME "zone"} | |
206 | val fname = OS.Path.joinDirFile {dir = Config.Bind.zonePath, | |
207 | file = fname} | |
208 | in | |
325285ab AC |
209 | Slave.shellF ([Config.rm, " -f ", fname], |
210 | fn cl => "Error deleting file: " ^ cl) | |
6ae327f8 AC |
211 | end |
212 | else | |
213 | let | |
214 | val inf = TextIO.openIn (OS.Path.joinDirFile {dir = #dir fs, | |
215 | file = "soa"}) | |
216 | val kind = readLine inf | |
217 | val ttl = readILine inf | |
218 | val ns = readLine inf | |
219 | val serial = case readLine inf of | |
220 | "" => NONE | |
221 | | s => Int.fromString s | |
222 | val rf = readILine inf | |
223 | val ret = readILine inf | |
224 | val exp = readILine inf | |
225 | val min = readILine inf | |
226 | val () = TextIO.closeIn inf | |
227 | ||
82a0d609 AC |
228 | val serialPath = OS.Path.joinDirFile {dir = Config.serialDir, |
229 | file = #domain fs} | |
230 | ||
3f07a40e | 231 | val oldSerial = let |
82a0d609 | 232 | val inf = TextIO.openIn serialPath |
3f07a40e AC |
233 | in |
234 | SOME (readLine inf) | |
235 | before TextIO.closeIn inf | |
82a0d609 | 236 | end handle IO.Io {name, ...} => NONE |
3f07a40e AC |
237 | |
238 | val newSerial = | |
239 | case serial of | |
240 | SOME n => Int.toString n | |
241 | | NONE => | |
242 | let | |
243 | val prefix = dateString () | |
244 | in | |
245 | prefix | |
246 | ^ (case oldSerial of | |
247 | NONE => "00" | |
248 | | SOME old => | |
249 | if size old >= 8 andalso | |
250 | String.substring (old, 0, 8) = prefix then | |
251 | case Int.fromString (String.extract (old, 8, NONE)) of | |
252 | NONE => "00" | |
253 | | SOME old => padBy #"0" 2 (Int.toString (old+1)) | |
254 | else | |
255 | "00") | |
256 | end | |
257 | ||
82a0d609 | 258 | val outf = TextIO.openOut serialPath |
3f07a40e AC |
259 | val _ = TextIO.output (outf, newSerial) |
260 | val _ = TextIO.closeOut outf | |
261 | ||
6ae327f8 AC |
262 | val dns = OS.Path.joinDirFile {dir = #dir fs, |
263 | file = "dns"} | |
264 | ||
265 | val fname = OS.Path.joinBaseExt {base = #domain fs, | |
266 | ext = SOME "zone"} | |
267 | val fname = OS.Path.joinDirFile {dir = Config.Bind.zonePath, | |
268 | file = fname} | |
269 | ||
270 | val outf = TextIO.openOut fname | |
271 | in | |
272 | zoneChanged := true; | |
273 | TextIO.output (outf, "$TTL "); | |
274 | TextIO.output (outf, Int.toString ttl); | |
275 | TextIO.output (outf, "\n\n@\tIN\tSOA\t"); | |
276 | TextIO.output (outf, ns); | |
277 | TextIO.output (outf, ".\thostmaster."); | |
278 | TextIO.output (outf, #domain fs); | |
722e651b | 279 | TextIO.output (outf, ". ( "); |
3f07a40e | 280 | TextIO.output (outf, newSerial); |
6ae327f8 AC |
281 | TextIO.output (outf, " "); |
282 | TextIO.output (outf, Int.toString rf); | |
283 | TextIO.output (outf, " "); | |
284 | TextIO.output (outf, Int.toString ret); | |
285 | TextIO.output (outf, " "); | |
286 | TextIO.output (outf, Int.toString exp); | |
287 | TextIO.output (outf, " "); | |
288 | TextIO.output (outf, Int.toString min); | |
289 | TextIO.output (outf, " )\n\n"); | |
290 | TextIO.closeOut outf; | |
325285ab AC |
291 | if Posix.FileSys.access (dns, []) then |
292 | Slave.shellF ([Config.cat, " ", dns, " >>", fname], | |
293 | fn cl => "Error concatenating file: " ^ cl) | |
294 | else | |
295 | (); | |
6ae327f8 AC |
296 | didDomain := #domain fs |
297 | end | |
298 | in | |
299 | case file of | |
300 | "soa" => dnsChanged () | |
301 | | "dns" => dnsChanged () | |
302 | | "named.conf" => namedChanged := true | |
303 | | _ => () | |
304 | end) | |
305 | ||
306 | val () = Slave.registerPostHandler | |
307 | (fn () => | |
308 | (if !namedChanged then | |
309 | Slave.concatTo (fn s => s = "named.conf") Config.Bind.namedConf | |
310 | else | |
311 | (); | |
312 | if !namedChanged orelse !zoneChanged then | |
313 | Slave.shellF ([Config.Bind.reload], | |
314 | fn cl => "Error reloading bind with " ^ cl) | |
315 | else | |
316 | ())) | |
71420f8b AC |
317 | |
318 | val () = Domain.registerResetLocal (fn () => | |
319 | ignore (OS.Process.system (Config.rm ^ " -rf /var/domtool/zones/*"))) | |
320 | ||
41c58daf AC |
321 | val () = Domain.registerDescriber (Domain.considerAll |
322 | [Domain.Filename {filename = "named.conf", | |
d936cf4d | 323 | heading = "named.conf addition:", |
41c58daf AC |
324 | showEmpty = false}, |
325 | Domain.Filename {filename = "dns", | |
d936cf4d | 326 | heading = "DNS zonefile contents:", |
41c58daf AC |
327 | showEmpty = false}]) |
328 | ||
6ae327f8 | 329 | end |