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Commit | Line | Data |
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14726412 | 1 | package PMG::SMTP; |
73238bb3 DM |
2 | |
3 | use strict; | |
14726412 | 4 | use warnings; |
73238bb3 | 5 | use IO::Socket; |
00eaaf69 | 6 | use Encode; |
cebfe036 | 7 | use MIME::Entity; |
73238bb3 | 8 | |
14726412 DM |
9 | use PVE::SafeSyslog; |
10 | ||
11 | use PMG::MailQueue; | |
cebfe036 | 12 | use PMG::Utils; |
14726412 | 13 | |
73238bb3 DM |
14 | sub new { |
15 | my($this, $sock) = @_; | |
14726412 | 16 | |
73238bb3 DM |
17 | my $class = ref($this) || $this; |
18 | ||
9ef3f143 | 19 | die("undefined socket: ERROR") if !defined($sock); |
73238bb3 DM |
20 | |
21 | my $self = {}; | |
22 | $self->{sock} = $sock; | |
23 | $self->{lmtp} = undef; | |
24 | bless($self, $class); | |
25 | ||
26 | $self->reset(); | |
27 | ||
28 | $self->reply ("220 Proxmox SMTP Ready."); | |
29 | return $self; | |
30 | } | |
31 | ||
32 | sub reset { | |
33 | my $self = shift; | |
34 | ||
35 | $self->{from} = undef; | |
36 | $self->{to} = []; | |
37 | $self->{queue} = undef; | |
4a00e01d | 38 | delete $self->{smtputf8}; |
73238bb3 DM |
39 | delete $self->{xforward}; |
40 | delete $self->{status}; | |
41 | } | |
42 | ||
43 | sub abort { | |
44 | shift->{sock}->close(); | |
45 | } | |
46 | ||
47 | sub reply { | |
48 | print {shift->{sock}} @_, "\r\n";; | |
49 | ||
50 | } | |
51 | ||
52 | sub loop { | |
53 | my ($self, $func, $data, $maxcount) = @_; | |
54 | ||
55 | my($cmd, $args); | |
73238bb3 | 56 | |
14726412 | 57 | my $sock = $self->{sock}; |
73238bb3 DM |
58 | |
59 | my $count = 0; | |
60 | ||
61 | while(<$sock>) { | |
62 | chomp; | |
63 | s/^\s+//; | |
64 | s/\s+$//; | |
65 | ||
66 | if (!length ($_)) { | |
67 | $self->reply ("500 5.5.1 Error: bad syntax"); | |
68 | next; | |
69 | } | |
70 | ($cmd, $args) = split(/\s+/, $_, 2); | |
71 | $cmd = lc ($cmd); | |
72 | ||
73 | if ($cmd eq 'helo' || $cmd eq 'ehlo' || $cmd eq 'lhlo') { | |
74 | $self->reset(); | |
75 | ||
73238bb3 DM |
76 | $self->reply ("250-PIPELINING"); |
77 | $self->reply ("250-ENHANCEDSTATUSCODES"); | |
78 | $self->reply ("250-8BITMIME"); | |
00eaaf69 | 79 | $self->reply ("250-SMTPUTF8"); |
73238bb3 DM |
80 | $self->reply ("250-XFORWARD NAME ADDR PROTO HELO"); |
81 | $self->reply ("250 OK."); | |
82 | $self->{lmtp} = 1 if ($cmd eq 'lhlo'); | |
83 | next; | |
84 | } elsif ($cmd eq 'xforward') { | |
85 | my @tmp = split (/\s+/, $args); | |
86 | foreach my $attr (@tmp) { | |
87 | my ($n, $v) = ($attr =~ /^(.*?)=(.*)$/); | |
88 | $self->{xforward}->{lc($n)} = $v; | |
89 | } | |
90 | $self->reply ("250 2.5.0 OK"); | |
91 | next; | |
92 | } elsif ($cmd eq 'noop') { | |
93 | $self->reply ("250 2.5.0 OK"); | |
94 | next; | |
95 | } elsif ($cmd eq 'quit') { | |
96 | $self->reply ("221 2.2.0 OK"); | |
97 | last; | |
98 | } elsif ($cmd eq 'rset') { | |
99 | $self->reset(); | |
100 | $self->reply ("250 2.5.0 OK"); | |
101 | next; | |
102 | } elsif ($cmd eq 'mail') { | |
00eaaf69 | 103 | if ($args =~ m/^from:\s*<([^\s\>]*)>([^>]*)$/i) { |
73238bb3 | 104 | delete $self->{to}; |
00eaaf69 | 105 | my ($from, $opts) = ($1, $2); |
4a00e01d DM |
106 | if ($opts =~ m/\sSMTPUTF8/) { |
107 | $self->{smtputf8} = 1; | |
108 | $from = decode('UTF-8', $from); | |
109 | } | |
00eaaf69 | 110 | $self->{from} = $from; |
73238bb3 DM |
111 | $self->reply ('250 2.5.0 OK'); |
112 | next; | |
113 | } else { | |
114 | $self->reply ("501 5.5.2 Syntax: MAIL FROM: <address>"); | |
115 | next; | |
116 | } | |
117 | } elsif ($cmd eq 'rcpt') { | |
4a00e01d DM |
118 | if ($args =~ m/^to:\s*<([^\s\>]+)>[^>]*$/i) { |
119 | my $to = $self->{smtputf8} ? decode('UTF-8', $1) : $1; | |
120 | push @{$self->{to}} , $to; | |
73238bb3 DM |
121 | $self->reply ('250 2.5.0 OK'); |
122 | next; | |
123 | } else { | |
f6c789ba | 124 | $self->reply ("501 5.5.2 Syntax: RCPT TO: <address>"); |
73238bb3 DM |
125 | next; |
126 | } | |
127 | } elsif ($cmd eq 'data') { | |
128 | if ($self->save_data ()) { | |
129 | eval { &$func ($data, $self); }; | |
9d04575a | 130 | if (my $err = $@) { |
73238bb3 | 131 | $data->{errors} = 1; |
9d04575a | 132 | syslog ('err', $err); |
73238bb3 DM |
133 | } |
134 | ||
88a51503 SI |
135 | my $cfg = $data->{pmg_cfg}; |
136 | ||
73238bb3 DM |
137 | if ($self->{lmtp}) { |
138 | foreach $a (@{$self->{to}}) { | |
139 | if ($self->{queue}->{status}->{$a} eq 'delivered') { | |
140 | $self->reply ("250 2.5.0 OK ($self->{queue}->{logid})"); | |
141 | } elsif ($self->{queue}->{status}->{$a} eq 'blocked') { | |
88a51503 SI |
142 | if ($cfg->get('mail', 'ndr_on_block')) { |
143 | $self->reply ("554 5.7.1 Rejected for policy reasons ($self->{queue}->{logid})"); | |
144 | } else { | |
145 | $self->reply ("250 2.7.0 BLOCKED ($self->{queue}->{logid})"); | |
146 | } | |
73238bb3 DM |
147 | } elsif ($self->{queue}->{status}->{$a} eq 'error') { |
148 | my $code = $self->{queue}->{status_code}->{$a}; | |
149 | my $resp = substr($code, 0, 1); | |
150 | my $mess = $self->{queue}->{status_message}->{$a}; | |
151 | $self->reply ("$code $resp.0.0 $mess"); | |
152 | } else { | |
153 | $self->reply ("451 4.4.0 detected undelivered mail to <$a>"); | |
154 | } | |
155 | } | |
156 | } else { | |
e0cbdf9f SI |
157 | my $queueid = $self->{queue}->{logid}; |
158 | my $qstat = $self->{queue}->{status}; | |
159 | my @rec = keys %$qstat; | |
160 | my @success_rec = grep { $qstat->{$_} eq 'delivered' } @rec; | |
161 | my @reject_rec = grep { $qstat->{$_} eq 'blocked' } @rec; | |
162 | ||
163 | if (scalar(@reject_rec) == scalar(@rec)) { | |
5eaba42b | 164 | $self->reply ("554 5.7.1 Rejected for policy reasons ($queueid)"); |
e0cbdf9f SI |
165 | syslog('info', "reject mail $queueid"); |
166 | } elsif ((scalar(@reject_rec) + scalar(@success_rec)) == scalar(@rec)) { | |
167 | $self->reply ("250 2.5.0 OK ($queueid)"); | |
168 | if ($cfg->get('mail', 'ndr_on_block')) { | |
169 | my $dnsinfo = $cfg->get_host_dns_info(); | |
170 | generate_ndr($self->{from}, [ @reject_rec ], $dnsinfo->{fqdn}, $queueid) if scalar(@reject_rec); | |
73238bb3 | 171 | } |
73238bb3 | 172 | } else { |
5eaba42b | 173 | $self->reply ("451 4.4.0 detected undelivered mail ($queueid)"); |
73238bb3 DM |
174 | } |
175 | } | |
176 | } | |
177 | ||
178 | $self->reset(); | |
179 | ||
180 | $count++; | |
181 | last if $count >= $maxcount; | |
182 | last if $data->{errors}; # abort if we find errors | |
183 | next; | |
184 | } | |
14726412 | 185 | |
73238bb3 DM |
186 | $self->reply ("500 5.5.1 Error: unknown command"); |
187 | } | |
188 | ||
189 | $self->{sock}->close; | |
190 | return $count; | |
191 | } | |
192 | ||
193 | sub save_data { | |
194 | my $self = shift; | |
195 | my $done = undef; | |
14726412 | 196 | |
73238bb3 DM |
197 | if(!defined($self->{from})) { |
198 | $self->reply ("503 5.5.1 Tell me who you are."); | |
199 | return 0; | |
200 | } | |
14726412 | 201 | |
73238bb3 DM |
202 | if(!defined($self->{to})) { |
203 | $self->reply ("503 5.5.1 Tell me who to send it."); | |
204 | return 0; | |
205 | } | |
206 | ||
207 | $self->reply ("354 End data with <CR><LF>.<CR><LF>"); | |
208 | ||
209 | my $sock = $self->{sock}; | |
210 | ||
211 | my $queue; | |
212 | ||
213 | eval { | |
14726412 DM |
214 | $queue = PMG::MailQueue->new ($self->{from}, $self->{to}); |
215 | ||
73238bb3 DM |
216 | while(<$sock>) { |
217 | ||
218 | if(/^\.\015\012$/) { | |
219 | $done = 1; | |
220 | last; | |
221 | } | |
14726412 | 222 | |
73238bb3 DM |
223 | # RFC 2821 compliance. |
224 | s/^\.\./\./; | |
225 | ||
14726412 | 226 | s/\015\012/\n/; |
73238bb3 DM |
227 | |
228 | print {$queue->{fh}} $_; | |
229 | $queue->{bytes} += length ($_); | |
230 | } | |
231 | ||
232 | $queue->{fh}->flush (); | |
233 | ||
14726412 | 234 | $self->{queue} = $queue; |
73238bb3 | 235 | }; |
9d04575a DM |
236 | if (my $err = $@) { |
237 | syslog ('err', $err); | |
238 | $self->reply ("451 4.5.0 Local delivery failed: $err"); | |
73238bb3 DM |
239 | return 0; |
240 | } | |
241 | if(!defined($done)) { | |
242 | $self->reply ("451 4.5.0 Local delivery failed: unfinished data"); | |
243 | return 0; | |
244 | } | |
245 | ||
246 | return 1; | |
247 | } | |
248 | ||
cebfe036 SI |
249 | sub generate_ndr { |
250 | my ($sender, $receivers, $hostname, $queueid) = @_; | |
251 | ||
252 | my $ndr_text = <<EOF | |
253 | This is the mail system at host $hostname. | |
254 | ||
255 | I'm sorry to have to inform you that your message could not | |
256 | be delivered to one or more recipients. | |
257 | ||
258 | For further assistance, please send mail to postmaster. | |
259 | ||
260 | If you do so, please include this problem report. | |
261 | The mail system | |
262 | ||
263 | 554 5.7.1 Recipient address(es) rejected for policy reasons | |
264 | EOF | |
265 | ; | |
266 | my $ndr = MIME::Entity->build( | |
267 | Type => 'multipart/report; report-type=delivery-status;', | |
268 | To => $sender, | |
269 | From => 'postmaster', | |
270 | Subject => 'Undelivered Mail'); | |
271 | ||
272 | $ndr->attach( | |
273 | Data => $ndr_text, | |
274 | Type => 'text/plain; charset=utf-8', | |
275 | Encoding => '8bit'); | |
276 | ||
277 | my $delivery_status = <<EOF | |
278 | Reporting-MTA: dns; $hostname | |
279 | X-Proxmox-Queue-ID: $queueid | |
280 | X-Proxmox-Sender: rfc822; $sender | |
281 | EOF | |
282 | ; | |
283 | foreach my $rec (@$receivers) { | |
284 | $delivery_status .= <<EOF | |
285 | Final-Recipient: rfc822; $rec | |
286 | Original-Recipient: rfc822;$rec | |
287 | Action: failed | |
288 | Status: 5.7.1 | |
289 | Diagnostic-Code: smtp; 554 5.7.1 Recipient address rejected for policy reasons | |
290 | ||
291 | EOF | |
292 | ; | |
293 | } | |
294 | $ndr->attach( | |
295 | Data => $delivery_status, | |
296 | Type => 'message/delivery-status', | |
297 | Encoding => '7bit', | |
298 | Description => 'Delivery report'); | |
299 | ||
300 | my $qid = PMG::Utils::reinject_mail($ndr, '', [$sender], undef, $hostname); | |
301 | if ($qid) { | |
302 | syslog('info', "sent NDR for rejecting recipients - $qid"); | |
303 | } else { | |
304 | syslog('err', "sending NDR for rejecting recipients failed"); | |
305 | } | |
306 | } | |
307 | ||
73238bb3 | 308 | 1; |