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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 |
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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 |
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42 | (fn _ => (Option.app TextIO.closeOut (!dns); |
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 |
52 | |
53 | val record = fn (EApp ((EApp ((EVar "dnsA", _), e1), _), e2), _) => |
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54 | (case (Env.string e1, Domain.ip e2) of |
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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) = |
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70 | case !dns of |
71 | NONE => print "Warning: DNS directive ignored because no master DNS server is configured for this domain\n" |
72 | | SOME file => |
73 | let |
74 | fun write s = TextIO.output (file, s) |
75 | val ttl = Env.env Env.int (evs, "TTL") |
76 | in |
77 | case r of |
78 | A (from, to) => (write from; |
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79 | write "."; |
80 | write (Domain.currentDomain ()); |
81 | write ".\t"; |
82 | write (Int.toString ttl); |
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83 | write "\tIN\tA\t"; |
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84 | write to; |
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85 | write "\n") |
86 | | CNAME (from, to) => (write from; |
87 | write "."; |
88 | write (Domain.currentDomain ()); |
89 | write ".\t"; |
90 | write (Int.toString ttl); |
91 | write "\tIN\tCNAME\t"; |
92 | write to; |
93 | write ".\n") |
94 | | MX (num, host) => (write "\t"; |
95 | write (Int.toString ttl); |
96 | write "\tIN\tMX\t"; |
97 | write (Int.toString num); |
98 | write "\t"; |
99 | write host; |
100 | write ".\n") |
101 | | NS host => (write "\t"; |
102 | write (Int.toString ttl); |
103 | write "\tIN\tNS\t"; |
104 | write host; |
105 | write ".\n") |
106 | end |
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107 | |
108 | val () = Env.actionV_one "dns" |
109 | ("record", record) |
110 | writeRecord |
111 | |
112 | fun readLine inf = |
113 | case TextIO.inputLine inf of |
114 | NONE => raise Fail "Expected a line for BIND" |
115 | | SOME s => String.substring (s, 0, size s - 1) |
116 | |
117 | fun readILine inf = valOf (Int.fromString (readLine inf)) |
118 | |
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119 | val monthToInt = fn Date.Jan => 1 |
120 | | Date.Feb => 2 |
121 | | Date.Mar => 3 |
122 | | Date.Apr => 4 |
123 | | Date.May => 5 |
124 | | Date.Jun => 6 |
125 | | Date.Jul => 7 |
126 | | Date.Aug => 8 |
127 | | Date.Sep => 9 |
128 | | Date.Oct => 10 |
129 | | Date.Nov => 11 |
130 | | Date.Dec => 12 |
131 | |
132 | fun padBy ch amt s = |
133 | if size s < amt then |
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134 | CharVector.tabulate (amt - size s, fn _ => ch) ^ s |
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135 | else |
136 | s |
137 | |
138 | fun dateString () = |
139 | let |
140 | val date = Date.fromTimeUniv (Time.now ()) |
141 | in |
142 | padBy #"0" 4 (Int.toString (Date.year date)) |
143 | ^ padBy #"0" 2 (Int.toString (monthToInt (Date.month date))) |
144 | ^ padBy #"0" 2 (Int.toString (Date.day date)) |
145 | end |
146 | |
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147 | val () = Slave.registerFileHandler (fn fs => |
148 | let |
149 | val {dir, file} = OS.Path.splitDirFile (#file fs) |
150 | |
151 | fun dnsChanged () = |
152 | if #domain fs = !didDomain then |
153 | () |
154 | else if #action fs = Slave.Delete then |
155 | let |
156 | val fname = OS.Path.joinBaseExt {base = #domain fs, |
157 | ext = SOME "zone"} |
158 | val fname = OS.Path.joinDirFile {dir = Config.Bind.zonePath, |
159 | file = fname} |
160 | in |
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161 | Slave.shellF ([Config.rm, " -f ", fname], |
162 | fn cl => "Error deleting file: " ^ cl) |
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163 | end |
164 | else |
165 | let |
166 | val inf = TextIO.openIn (OS.Path.joinDirFile {dir = #dir fs, |
167 | file = "soa"}) |
168 | val kind = readLine inf |
169 | val ttl = readILine inf |
170 | val ns = readLine inf |
171 | val serial = case readLine inf of |
172 | "" => NONE |
173 | | s => Int.fromString s |
174 | val rf = readILine inf |
175 | val ret = readILine inf |
176 | val exp = readILine inf |
177 | val min = readILine inf |
178 | val () = TextIO.closeIn inf |
179 | |
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180 | val serialPath = OS.Path.joinDirFile {dir = Config.serialDir, |
181 | file = #domain fs} |
182 | |
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183 | val oldSerial = let |
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184 | val inf = TextIO.openIn serialPath |
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185 | in |
186 | SOME (readLine inf) |
187 | before TextIO.closeIn inf |
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188 | end handle IO.Io {name, ...} => NONE |
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189 | |
190 | val newSerial = |
191 | case serial of |
192 | SOME n => Int.toString n |
193 | | NONE => |
194 | let |
195 | val prefix = dateString () |
196 | in |
197 | prefix |
198 | ^ (case oldSerial of |
199 | NONE => "00" |
200 | | SOME old => |
201 | if size old >= 8 andalso |
202 | String.substring (old, 0, 8) = prefix then |
203 | case Int.fromString (String.extract (old, 8, NONE)) of |
204 | NONE => "00" |
205 | | SOME old => padBy #"0" 2 (Int.toString (old+1)) |
206 | else |
207 | "00") |
208 | end |
209 | |
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210 | val outf = TextIO.openOut serialPath |
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211 | val _ = TextIO.output (outf, newSerial) |
212 | val _ = TextIO.closeOut outf |
213 | |
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214 | val dns = OS.Path.joinDirFile {dir = #dir fs, |
215 | file = "dns"} |
216 | |
217 | val fname = OS.Path.joinBaseExt {base = #domain fs, |
218 | ext = SOME "zone"} |
219 | val fname = OS.Path.joinDirFile {dir = Config.Bind.zonePath, |
220 | file = fname} |
221 | |
222 | val outf = TextIO.openOut fname |
223 | in |
224 | zoneChanged := true; |
225 | TextIO.output (outf, "$TTL "); |
226 | TextIO.output (outf, Int.toString ttl); |
227 | TextIO.output (outf, "\n\n@\tIN\tSOA\t"); |
228 | TextIO.output (outf, ns); |
229 | TextIO.output (outf, ".\thostmaster."); |
230 | TextIO.output (outf, #domain fs); |
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231 | TextIO.output (outf, ". ( "); |
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232 | TextIO.output (outf, newSerial); |
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233 | TextIO.output (outf, " "); |
234 | TextIO.output (outf, Int.toString rf); |
235 | TextIO.output (outf, " "); |
236 | TextIO.output (outf, Int.toString ret); |
237 | TextIO.output (outf, " "); |
238 | TextIO.output (outf, Int.toString exp); |
239 | TextIO.output (outf, " "); |
240 | TextIO.output (outf, Int.toString min); |
241 | TextIO.output (outf, " )\n\n"); |
242 | TextIO.closeOut outf; |
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243 | if Posix.FileSys.access (dns, []) then |
244 | Slave.shellF ([Config.cat, " ", dns, " >>", fname], |
245 | fn cl => "Error concatenating file: " ^ cl) |
246 | else |
247 | (); |
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248 | didDomain := #domain fs |
249 | end |
250 | in |
251 | case file of |
252 | "soa" => dnsChanged () |
253 | | "dns" => dnsChanged () |
254 | | "named.conf" => namedChanged := true |
255 | | _ => () |
256 | end) |
257 | |
258 | val () = Slave.registerPostHandler |
259 | (fn () => |
260 | (if !namedChanged then |
261 | Slave.concatTo (fn s => s = "named.conf") Config.Bind.namedConf |
262 | else |
263 | (); |
264 | if !namedChanged orelse !zoneChanged then |
265 | Slave.shellF ([Config.Bind.reload], |
266 | fn cl => "Error reloading bind with " ^ cl) |
267 | else |
268 | ())) |
269 | end |