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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 | |
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34 | val dns : Domain.files option ref = ref NONE |
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35 | |
36 | val _ = Domain.registerBefore |
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37 | (fn _ => dns := Option.map (fn node => Domain.domainsFile {node = node, |
38 | name = "dns"}) |
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39 | (Domain.dnsMaster ())) |
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40 | |
41 | val _ = Domain.registerAfter |
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42 | (fn _ => (Option.app (fn files => #close files ()) (!dns); |
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43 | dns := NONE)) |
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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 |
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52 | | DefaultA of string |
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53 | |
54 | val record = fn (EApp ((EApp ((EVar "dnsA", _), e1), _), e2), _) => |
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55 | (case (Env.string e1, Domain.ip e2) of |
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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) |
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68 | | (EApp ((EVar "dnsDefaultA", _), e), _) => |
69 | Option.map DefaultA (Env.string e) |
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70 | | _ => NONE |
71 | |
72 | fun writeRecord (evs, r) = |
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73 | case !dns of |
74 | NONE => print "Warning: DNS directive ignored because no master DNS server is configured for this domain\n" |
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75 | | SOME files => |
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76 | let |
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77 | fun write s = #write files s |
78 | fun writeDom () = #writeDom files () |
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79 | val ttl = Env.env Env.int (evs, "TTL") |
80 | in |
81 | case r of |
82 | A (from, to) => (write from; |
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83 | write "."; |
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84 | writeDom (); |
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85 | write ".\t"; |
86 | write (Int.toString ttl); |
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87 | write "\tIN\tA\t"; |
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88 | write to; |
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89 | write "\n") |
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90 | | DefaultA to => (writeDom (); |
91 | write ".\t"; |
92 | write (Int.toString ttl); |
93 | write "\tIN\tA\t"; |
94 | write to; |
95 | write "\n") |
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96 | | CNAME (from, to) => (write from; |
97 | write "."; |
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98 | writeDom (); |
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99 | write ".\t"; |
100 | write (Int.toString ttl); |
101 | write "\tIN\tCNAME\t"; |
102 | write to; |
103 | write ".\n") |
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104 | | MX (num, host) => (writeDom (); |
105 | write ".\t"; |
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106 | write (Int.toString ttl); |
107 | write "\tIN\tMX\t"; |
108 | write (Int.toString num); |
109 | write "\t"; |
110 | write host; |
111 | write ".\n") |
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112 | | NS host => (writeDom (); |
113 | write ".\t"; |
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114 | write (Int.toString ttl); |
115 | write "\tIN\tNS\t"; |
116 | write host; |
117 | write ".\n") |
118 | end |
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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 | |
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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 |
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146 | CharVector.tabulate (amt - size s, fn _ => ch) ^ s |
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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 | |
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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 | () |
166 | else if #action fs = Slave.Delete then |
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 |
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173 | Slave.shellF ([Config.rm, " -f ", fname], |
174 | fn cl => "Error deleting file: " ^ cl) |
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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 | |
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192 | val serialPath = OS.Path.joinDirFile {dir = Config.serialDir, |
193 | file = #domain fs} |
194 | |
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195 | val oldSerial = let |
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196 | val inf = TextIO.openIn serialPath |
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197 | in |
198 | SOME (readLine inf) |
199 | before TextIO.closeIn inf |
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200 | end handle IO.Io {name, ...} => NONE |
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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 | |
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222 | val outf = TextIO.openOut serialPath |
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223 | val _ = TextIO.output (outf, newSerial) |
224 | val _ = TextIO.closeOut outf |
225 | |
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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); |
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243 | TextIO.output (outf, ". ( "); |
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244 | TextIO.output (outf, newSerial); |
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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; |
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255 | if Posix.FileSys.access (dns, []) then |
256 | Slave.shellF ([Config.cat, " ", dns, " >>", fname], |
257 | fn cl => "Error concatenating file: " ^ cl) |
258 | else |
259 | (); |
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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 | ())) |
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281 | |
282 | val () = Domain.registerResetLocal (fn () => |
283 | ignore (OS.Process.system (Config.rm ^ " -rf /var/domtool/zones/*"))) |
284 | |
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285 | end |