File Coverage

lib/Sisimai/Lhost/DragonFly.pm

Criterion	Covered	Total	%
statement	45	47	95.7
branch	16	20	80.0
condition	9	12	75.0
subroutine	6	6	100.0
pod	2	2	100.0
total	78	87	89.6

package Sisimai::Lhost::DragonFly;
use parent 'Sisimai::Lhost';
use v5.26;
use strict;
use warnings;

sub description { 'DragonFly: https://www.dragonflybsd.org/handbook/mta/' }
sub inquire {
    # Detect an error from DMA: DragonFly Mail Agent
    # @param    [Hash] mhead    Message headers of a bounce email
    # @param    [String] mbody  Message body of a bounce email
    # @return   [Hash]          Bounce data list and message/rfc822 part
    # @return   [undef]         failed to decode or the arguments are missing
    # @since v5.0.4
    my $class = shift;
    my $mhead = shift // return undef;
    my $mbody = shift // return undef;

    return undef unless index($mhead->{'subject'}, 'Mail delivery failed') > -1;
    return undef unless grep { rindex($_, ' (DragonFly Mail Agent') > -1 } $mhead->{'received'}->@*;

    state $indicators = __PACKAGE__->INDICATORS;
    state $boundaries = ['Original message follows.', 'Message headers follow'];
    state $startingof = {
        # https://github.com/corecode/dma/blob/ffad280aa40c242aa9a2cb9ca5b1b6e8efedd17e/mail.c#L84
        'message' => ['This is the DragonFly Mail Agent '],
    };

    my $dscontents = [__PACKAGE__->DELIVERYSTATUS]; my $v = undef;
    my $emailparts = Sisimai::RFC5322->part($mbody, $boundaries);
    my $readcursor = 0;     # (Integer) Points the current cursor position
    my $recipients = 0;     # (Integer) The number of 'Final-Recipient' header

    require Sisimai::Address;
    require Sisimai::SMTP::Command;

    for my $e ( split("\n", $emailparts->[0]) ) {
        # Read error messages and delivery status lines from the head of the email to the previous
        # line of the beginning of the original message.
        unless( $readcursor ) {
            # Beginning of the bounce message or message/delivery-status part
            $readcursor |= $indicators->{'deliverystatus'} if index($e, $startingof->{'message'}->[0]) == 0;
            next;
        }
        next if ($readcursor & $indicators->{'deliverystatus'}) == 0 || $e eq "";

        # This is the DragonFly Mail Agent v0.13 at df.example.jp.
        #
        # There was an error delivering your mail to .
        #
        # email.example.jp [192.0.2.25] did not like our RCPT TO:
        # 552 5.2.2 : Recipient address rejected: Mailbox full
        #
        # Original message follows.
        $v = $dscontents->[-1];

        if( index($e, 'There was an error delivering your mail to <') == 0 ) {
            # email.example.jp [192.0.2.25] did not like our RCPT TO:
            # 552 5.2.2 : Recipient address rejected: Mailbox full
            if( $v->{'recipient'} ) {
                # There are multiple recipient addresses in the message body.
                push @$dscontents, __PACKAGE__->DELIVERYSTATUS;
                $v = $dscontents->[-1];
            }
            $v->{'recipient'} = Sisimai::Address->s3s4(substr($e, index($e, '<'), -1));
            $recipients++;

        } else {
            # Pick the error message
            $v->{'diagnosis'} .= $e;

            # Pick the remote hostname, and the SMTP command
            # net.c:500| snprintf(errmsg, sizeof(errmsg), "%s [%s] did not like our %s:\n%s",
            next if index($e, ' did not like our ') < 0 || length $v->{'rhost'} > 0;

            my $p = [split(' ', $e, 3)];
            $v->{'rhost'}   = index($p->[0], '.') > 1 ? $p->[0] : $p->[1];
            $v->{'command'} = Sisimai::SMTP::Command->find($e) || '';
        }
    }
    return undef unless $recipients;
    return {"ds" => $dscontents, "rfc822" => $emailparts->[1]};
}

1;
__END__