72 lines
1.7 KiB
Plaintext
72 lines
1.7 KiB
Plaintext
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#!/usr/bin/perl
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=head1 NAME
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check_basicheaders - Make sure both From and Date headers are present, and
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do optional range checking on the Date header
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=head1 DESCRIPTION
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Rejects messages that do not have a From or Date header or are completely
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empty.
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Can also reject messages where the date in the Date header is more than
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some number of the days in the past or future.
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=head1 CONFIGURATION
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Takes one optional parameter, the number of days in the future or past
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beyond which to reject messages. (The default is to not reject messages
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based on the date.)
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=head1 AUTHOR
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Written by Jim Winstead Jr.
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=head1 LICENSE
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Released to the public domain, 26 March 2004.
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=cut
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use Date::Parse qw(str2time);
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sub register {
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my ($self, $qp, @args) = @_;
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$self->register_hook("data_post", "check_basic_headers");
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if (@args > 0) {
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$self->{_days} = $args[0];
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$self->log(1, "WARNING: Ignoring additional arguments.") if (@args > 1);
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}
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}
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sub check_basic_headers {
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my ($self, $transaction) = @_;
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return (DENY, "You have to send some data first")
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if $transaction->body_size == 0;
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return (DENY, "Mail with no From header not accepted here")
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unless $transaction->header->get('From');
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my $date = $transaction->header->get('Date');
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return (DENY, "Mail with no Date header not accepted here")
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unless $date;
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return (DECLINED) unless defined $self->{_days};
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my $ts = str2time($date);
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return (DECLINED) unless $ts;
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return (DENY, "The Date in the header was too far in the past")
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if $ts < time - ($self->{_days}*24*3600);
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return (DENY, "The Date in the header was too far in the future")
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if $ts > time + ($self->{_days}*24*3600);
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return (DECLINED);
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}
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