| 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 |
| 35 | |
| 36 | val _ = Domain.registerBefore |
| 37 | (fn _ => dns := Option.map (fn node => Domain.domainFile {node = node, |
| 38 | name = "dns"}) |
| 39 | (Domain.dnsMaster ())) |
| 40 | |
| 41 | val _ = Domain.registerAfter |
| 42 | (fn _ => (Option.app TextIO.closeOut (!dns); |
| 43 | dns := NONE)) |
| 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), _) => |
| 54 | (case (Env.string e1, Domain.ip e2) of |
| 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) = |
| 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; |
| 79 | write "."; |
| 80 | write (Domain.currentDomain ()); |
| 81 | write ".\t"; |
| 82 | write (Int.toString ttl); |
| 83 | write "\tIN\tA\t"; |
| 84 | write to; |
| 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 |
| 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 | |
| 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 |
| 134 | CharVector.tabulate (amt - size s, fn _ => ch) ^ s |
| 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 | |
| 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 |
| 161 | Slave.shellF ([Config.rm, " -f ", fname], |
| 162 | fn cl => "Error deleting file: " ^ cl) |
| 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 | |
| 180 | val serialPath = OS.Path.joinDirFile {dir = Config.serialDir, |
| 181 | file = #domain fs} |
| 182 | |
| 183 | val oldSerial = let |
| 184 | val inf = TextIO.openIn serialPath |
| 185 | in |
| 186 | SOME (readLine inf) |
| 187 | before TextIO.closeIn inf |
| 188 | end handle IO.Io {name, ...} => NONE |
| 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 | |
| 210 | val outf = TextIO.openOut serialPath |
| 211 | val _ = TextIO.output (outf, newSerial) |
| 212 | val _ = TextIO.closeOut outf |
| 213 | |
| 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); |
| 231 | TextIO.output (outf, ". ( "); |
| 232 | TextIO.output (outf, newSerial); |
| 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; |
| 243 | if Posix.FileSys.access (dns, []) then |
| 244 | Slave.shellF ([Config.cat, " ", dns, " >>", fname], |
| 245 | fn cl => "Error concatenating file: " ^ cl) |
| 246 | else |
| 247 | (); |
| 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 |