113 lines
2.7 KiB
Perl
113 lines
2.7 KiB
Perl
package Qpsmtpd::Base;
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use strict;
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use Net::DNS;
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use Net::IP;
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sub new {
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return bless {}, shift;
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}
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sub tildeexp {
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my ($self, $path) = @_;
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$path =~ s{^~([^/]*)} {
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$1 ? (getpwnam($1))[7]
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: ( $ENV{HOME} || $ENV{LOGDIR} || (getpwuid($>))[7])
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}ex;
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return $path;
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}
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sub is_localhost {
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my ($self, $ip) = @_;
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return if ! $ip;
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return 1 if $ip =~ /^127\./; # IPv4
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return 1 if $ip =~ /:127\./; # IPv4 mapped IPv6
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return 1 if $ip eq '::1'; # IPv6
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return;
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}
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sub is_valid_ip {
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my ($self, $ip) = @_;
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if (Net::IP::ip_is_ipv4($ip)) {
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return if $ip eq '0.0.0.0';
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return if $ip eq '255.255.255.255';
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return if $ip =~ /255/;
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return 1;
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};
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return 1 if Net::IP::ip_is_ipv6($ip);
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return;
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}
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sub is_ipv6 {
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my ($self, $ip) = @_;
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return if !$ip;
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return Net::IP::ip_is_ipv6($ip);
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}
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sub get_resolver {
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my ($self, %args) = @_;
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return $self->{_resolver} if $self->{_resolver};
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my $timeout = 5;
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if (defined $args{timeout}) {
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$timeout = delete $args{timeout};
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}
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$self->{_resolver} = Net::DNS::Resolver->new(dnsrch => 0);
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$self->{_resolver}->tcp_timeout($timeout);
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$self->{_resolver}->udp_timeout($timeout);
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return $self->{_resolver};
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}
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sub get_async_resolver {
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my ( $self, %args ) = @_;
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return $self->{_async_resolver} if $self->{_async_resolver};
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my $async_res;
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eval 'use Net::DNS::Async';
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if ($@) {
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warn "could not load Net::DNS::Async, is it installed?";
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return;
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}
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my $res = Net::DNS::Resolver->new(dnsrch => 0);
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$res->tcp_timeout(0); # Net::DNS::Async handles its own timeouts
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$res->tcp_timeout(0);
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$self->{_async_resolver} = Net::DNS::Async->new( %args );
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$self->{_async_resolver}{Resolver} = $res;
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return $self->{_async_resolver};
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}
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sub resolve_a {
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my ($self, $name) = @_;
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my $q = $self->get_resolver->query($name, 'A') or return;
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return map { $_->address } grep { $_->type eq 'A' } $q->answer;
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}
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sub resolve_aaaa {
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my ($self, $name) = @_;
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my $q = $self->get_resolver->query($name, 'AAAA') or return;
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return map { $_->address } grep { $_->type eq 'AAAA' } $q->answer;
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}
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sub resolve_mx {
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my ($self, $name) = @_;
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my $q = $self->get_resolver->query($name, 'MX') or return;
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return map { $_->exchange } grep { $_->type eq 'MX' } $q->answer;
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}
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sub resolve_ns {
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my ($self, $name) = @_;
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my $q = $self->get_resolver->query($name, 'NS') or return;
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return map { $_->nsdname } grep { $_->type eq 'NS' } $q->answer;
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}
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sub resolve_ptr {
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my ($self, $name) = @_;
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my $q = $self->get_resolver->query($name, 'PTR') or return;
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return map { $_->ptrdname } grep { $_->type eq 'PTR' } $q->answer;
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}
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1;
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