external/bsd/bind/dist/contrib/sdb/tcl/lookup.tcl

   1 # Copyright (C) 2004, 2007, 2012  Internet Systems Consortium, Inc. ("ISC")
   2 # Copyright (C) 2000, 2001  Internet Software Consortium.
   3 #
   4 # Permission to use, copy, modify, and/or distribute this software for any
   5 # purpose with or without fee is hereby granted, provided that the above
   6 # copyright notice and this permission notice appear in all copies.
   7 #
   8 # THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
   9 # REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
  10 # AND FITNESS.  IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
  11 # INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
  12 # LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
  13 # OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
  14 # PERFORMANCE OF THIS SOFTWARE.
  15
  16 # Id: lookup.tcl,v 1.10 2007/06/19 23:47:08 tbox Exp
  17
  18 #
  19 # Sample lookup procedure for tcldb
  20 #
  21 # This lookup procedure defines zones with identical SOA, NS, and MX
  22 # records at the apex and a single A record that varies from zone to
  23 # zone at the name "www".
  24 #
  25 # Something like this could be used by a web hosting company to serve
  26 # a number of domains without needing to create a separate master file
  27 # for each domain.  Instead, all per-zone data (in this case, a single
  28 # IP address) specified in the named.conf file like this:
  29 #
  30 #   zone "a.com." { type master; database "tcl 10.0.0.42"; };
  31 #   zone "b.com." { type master; database "tcl 10.0.0.99"; };
  32 #
  33 # Since the tcldb driver doesn't support zone transfers, there should
  34 # be at least two identically configured master servers.  In the
  35 # example below, they are assumed to be called ns1.isp.nil and
  36 # ns2.isp.nil.
  37 #
  38
  39 proc lookup {zone name} {
  40     global dbargs
  41     switch -- $name {
  42         @ { return [list \
  43                 {SOA 86400 "ns1.isp.nil. hostmaster.isp.nil. \
  44                     1 3600 1800 1814400 3600"} \
  45                 {NS 86400 "ns1.isp.nil."} \
  46                 {NS 86400 "ns2.isp.nil."} \
  47                 {MX 86400 "10 mail.isp.nil."} ] }
  48         www { return [list [list A 3600 $dbargs($zone)] ] }
  49     }
  50     return NXDOMAIN
  51 }