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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)) |
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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) = |
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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; |
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78 | write "."; |
79 | write (Domain.currentDomain ()); |
80 | write ".\t"; |
81 | write (Int.toString ttl); |
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82 | write "\tIN\tA\t"; |
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83 | write to; |
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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 |