| 1 |
=head1 NAME |
| 2 |
|
| 3 |
EV::DNS - perl interface to libevent's evdns module |
| 4 |
|
| 5 |
=head1 SYNOPSIS |
| 6 |
|
| 7 |
use EV::DNS; |
| 8 |
|
| 9 |
EV::DNS::resolve_reverse +(Socket::inet_aton "129.13.162.95"), 0, sub { |
| 10 |
my ($result, $type, $ttl, @ptrs) = @_; |
| 11 |
warn "resolves to @ptrs"; |
| 12 |
}; |
| 13 |
|
| 14 |
EV::DNS::resolve_ipv4 "www.goof.com", 0, sub { |
| 15 |
my ($result, $type, $ttl, @ptrs) = @_; |
| 16 |
warn "resolves to " . Socket::inet_ntoa $ptrs[0] |
| 17 |
if @ptrs; |
| 18 |
}; |
| 19 |
|
| 20 |
=head1 DESCRIPTION |
| 21 |
|
| 22 |
This module provides an interface to libevent's evdns module, see |
| 23 |
(L<http://monkey.org/~provos/libevent/>). |
| 24 |
|
| 25 |
=cut |
| 26 |
|
| 27 |
package EV::DNS; |
| 28 |
|
| 29 |
use strict; |
| 30 |
|
| 31 |
use EV; |
| 32 |
|
| 33 |
=head1 FUNCTIONAL INTERFACE |
| 34 |
|
| 35 |
TODO |
| 36 |
|
| 37 |
=over 4 |
| 38 |
|
| 39 |
=item EV::DNS::init |
| 40 |
|
| 41 |
Called automatically when the module is firts used. Uses resolv.conf |
| 42 |
and/or some obscure win32 ibterface to initialise the nameservers and |
| 43 |
other parameters. |
| 44 |
|
| 45 |
=item EV::DNS::shutdown $fail_requests = 1 |
| 46 |
|
| 47 |
Shuts the DNS client down. |
| 48 |
|
| 49 |
=item $str = EV::DNS::err_to_string $errnum |
| 50 |
|
| 51 |
=item EV::DNS::nameserver_add $adress_as_unteger |
| 52 |
|
| 53 |
Use unpack "N", Socket::inet_aton "address". |
| 54 |
|
| 55 |
=item $count = EV::DNS::count_nameservers |
| 56 |
|
| 57 |
=item int EV::DNS::clear_nameservers_and_suspend |
| 58 |
|
| 59 |
=item int EV::DNS::resume |
| 60 |
|
| 61 |
=item int EV::DNS::nameserver_ip_add $address |
| 62 |
|
| 63 |
=item int EV::DNS::resolve_ipv4 $hostname, $flags, $cb->($result, $type, $ttl, @addrs); |
| 64 |
|
| 65 |
=item int EV::DNS::resolve_ipv6 $hostname, $flags, $cb->($result, $type, $ttl, @addrs); |
| 66 |
|
| 67 |
resolve ipv6 crashes your program in libevent versions up and including at leats 1.3e. |
| 68 |
|
| 69 |
=item int EV::DNS::resolve_reverse $4_or_6_bytes, $flagsm $cb->($result, $type, $ttl, @domains) |
| 70 |
|
| 71 |
=item int EV::DNS::set_option $optionname, $value, $flags |
| 72 |
|
| 73 |
EV::DNS::set_option "ndots:", "4" |
| 74 |
|
| 75 |
=item int EV::DNS::resolv_conf_parse $flags, $filename |
| 76 |
|
| 77 |
=item int EV::DNS::config_windows_nameservers |
| 78 |
|
| 79 |
=item EV::DNS::search_clear |
| 80 |
|
| 81 |
=item EV::DNS::search_add $domain |
| 82 |
|
| 83 |
=item EV::DNS::search_ndots_set $ndots |
| 84 |
|
| 85 |
=back |
| 86 |
|
| 87 |
=head1 BUGS |
| 88 |
|
| 89 |
* At least up to version 1.3e of libevent, resolve_reverse_ipv6 will |
| 90 |
always crash the program with an assertion failure. |
| 91 |
* use'ing this module will keep events registered so the event loop |
| 92 |
will never return unless loopexit is called. |
| 93 |
|
| 94 |
=cut |
| 95 |
|
| 96 |
init; |
| 97 |
|
| 98 |
1; |
| 99 |
|
| 100 |
=head1 SEE ALSO |
| 101 |
|
| 102 |
=head1 AUTHOR |
| 103 |
|
| 104 |
Marc Lehmann <schmorp@schmorp.de> |
| 105 |
http://home.schmorp.de/ |
| 106 |
|
| 107 |
=cut |
| 108 |
|
