1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
|
/*++
/* NAME
/* defer 3
/* SUMMARY
/* defer service client interface
/* SYNOPSIS
/* #include <defer.h>
/*
/* int defer_append(flags, id, stats, rcpt, relay, dsn)
/* int flags;
/* const char *id;
/* MSG_STATS *stats;
/* RECIPIENT *rcpt;
/* const char *relay;
/* DSN *dsn;
/*
/* int defer_flush(flags, queue, id, encoding, smtputf8, sender,
/* dsn_envid, dsn_ret)
/* int flags;
/* const char *queue;
/* const char *id;
/* const char *encoding;
/* int smtputf8;
/* const char *sender;
/* const char *dsn_envid;
/* int dsn_ret;
/*
/* int defer_warn(flags, queue, id, encoding, smtputf8, sender,
dsn_envid, dsn_ret)
/* int flags;
/* const char *queue;
/* const char *id;
/* const char *encoding;
/* int smtputf8;
/* const char *sender;
/* const char *dsn_envid;
/* int dsn_ret;
/*
/* int defer_one(flags, queue, id, encoding, smtputf8, sender,
/* dsn_envid, ret, stats, recipient, relay, dsn)
/* int flags;
/* const char *queue;
/* const char *id;
/* const char *encoding;
/* int smtputf8;
/* const char *sender;
/* const char *dsn_envid;
/* int dsn_ret;
/* MSG_STATS *stats;
/* RECIPIENT *rcpt;
/* const char *relay;
/* DSN *dsn;
/* INTERNAL API
/* int defer_append_intern(flags, id, stats, rcpt, relay, dsn)
/* int flags;
/* const char *id;
/* MSG_STATS *stats;
/* RECIPIENT *rcpt;
/* const char *relay;
/* DESCRIPTION
/* This module implements a client interface to the defer service,
/* which maintains a per-message logfile with status records for
/* each recipient whose delivery is deferred, and the dsn_text why.
/*
/* defer_append() appends a record to the per-message defer log,
/* with the dsn_text for delayed delivery to the named rcpt,
/* updates the address verification service, or updates a message
/* delivery record on request by the sender. The flags argument
/* determines the action.
/* The result is a convenient non-zero value.
/* When the fast flush cache is enabled, the fast flush server is
/* notified of deferred mail.
/*
/* defer_flush() bounces the specified message to the specified
/* sender, including the defer log that was built with defer_append().
/* defer_flush() requests that the deferred recipients are deleted
/* from the original queue file; the defer logfile is deleted after
/* successful completion.
/* The result is zero in case of success, non-zero otherwise.
/*
/* defer_warn() sends a warning message that the mail in
/* question has been deferred. The defer log is not deleted,
/* and no recipients are deleted from the original queue file.
/*
/* defer_one() implements dsn_filter(3) compatibility for the
/* bounce_one() routine.
/*
/* defer_append_intern() is for use after the DSN filter.
/*
/* Arguments:
/* .IP flags
/* The bit-wise OR of zero or more of the following (specify
/* BOUNCE_FLAG_NONE to explicitly request not special processing):
/* .RS
/* .IP BOUNCE_FLAG_CLEAN
/* Delete the defer log in case of an error (as in: pretend
/* that we never even tried to defer this message).
/* .IP BOUNCE_FLAG_DELRCPT
/* When specified with a flush request, request that
/* recipients be deleted from the queue file.
/*
/* Note: the bounce daemon ignores this request when the
/* recipient queue file offset is <= 0.
/* .IP DEL_REQ_FLAG_MTA_VRFY
/* The message is an MTA-requested address verification probe.
/* Update the address verification database instead of deferring
/* mail.
/* .IP DEL_REQ_FLAG_USR_VRFY
/* The message is a user-requested address expansion probe.
/* Update the message delivery record instead of deferring
/* mail.
/* .IP DEL_REQ_FLAG_RECORD
/* This is a normal message with logged delivery. Update the
/* message delivery record and defer mail delivery.
/* .RE
/* .IP queue
/* The message queue name of the original message file.
/* .IP id
/* The queue id of the original message file.
/* .IP stats
/* Time stamps from different message delivery stages
/* and session reuse count.
/* .IP rcpt
/* Recipient information. See recipient_list(3).
/* .IP relay
/* Host we could not talk to.
/* .IP dsn
/* Delivery status. See dsn(3). The specified action is ignored.
/* .IP encoding
/* The body content encoding: MAIL_ATTR_ENC_{7BIT,8BIT,NONE}.
/* .IP smtputf8
/* The level of SMTPUTF8 support (to be defined).
/* .IP sender
/* The sender envelope address.
/* .IP dsn_envid
/* Optional DSN envelope ID.
/* .IP dsn_ret
/* Optional DSN return full/headers option.
/* .PP
/* For convenience, these functions always return a non-zero result.
/* DIAGNOSTICS
/* Warnings: problems connecting to the defer service.
/* Fatal: out of memory.
/* BUGS
/* Should be replaced by routines with an attribute-value based
/* interface instead of an interface that uses a rigid argument list.
/* LICENSE
/* .ad
/* .fi
/* The Secure Mailer license must be distributed with this software.
/* AUTHOR(S)
/* Wietse Venema
/* IBM T.J. Watson Research
/* P.O. Box 704
/* Yorktown Heights, NY 10598, USA
/*--*/
/* System library. */
#include <sys_defs.h>
#include <string.h>
/* Utility library. */
#include <msg.h>
#include <vstring.h>
/* Global library. */
#define DSN_INTERN
#include <mail_params.h>
#include <mail_queue.h>
#include <mail_proto.h>
#include <flush_clnt.h>
#include <verify.h>
#include <dsn_util.h>
#include <rcpt_print.h>
#include <dsn_print.h>
#include <log_adhoc.h>
#include <trace.h>
#include <defer.h>
#define STR(x) vstring_str(x)
/* defer_append - defer message delivery */
int defer_append(int flags, const char *id, MSG_STATS *stats,
RECIPIENT *rcpt, const char *relay,
DSN *dsn)
{
DSN my_dsn = *dsn;
DSN *dsn_res;
/*
* Sanity check.
*/
if (my_dsn.status[0] != '4' || !dsn_valid(my_dsn.status)) {
msg_warn("defer_append: ignoring dsn code \"%s\"", my_dsn.status);
my_dsn.status = "4.0.0";
}
/*
* DSN filter (Postfix 3.0).
*/
if (delivery_status_filter != 0
&& (dsn_res = dsn_filter_lookup(delivery_status_filter, &my_dsn)) != 0) {
if (dsn_res->status[0] == '5')
return (bounce_append_intern(flags, id, stats, rcpt, relay, dsn_res));
my_dsn = *dsn_res;
}
return (defer_append_intern(flags, id, stats, rcpt, relay, &my_dsn));
}
/* defer_append_intern - defer message delivery */
int defer_append_intern(int flags, const char *id, MSG_STATS *stats,
RECIPIENT *rcpt, const char *relay,
DSN *dsn)
{
const char *rcpt_domain;
DSN my_dsn = *dsn;
int status;
/*
* MTA-requested address verification information is stored in the verify
* service database.
*/
if (flags & DEL_REQ_FLAG_MTA_VRFY) {
my_dsn.action = "undeliverable";
status = verify_append(id, stats, rcpt, relay, &my_dsn,
DEL_RCPT_STAT_DEFER);
return (status);
}
/*
* User-requested address verification information is logged and mailed
* to the requesting user.
*/
if (flags & DEL_REQ_FLAG_USR_VRFY) {
my_dsn.action = "undeliverable";
status = trace_append(flags, id, stats, rcpt, relay, &my_dsn);
return (status);
}
/*
* Normal mail delivery. May also send a delivery record to the user.
*
* XXX DSN We write all deferred recipients to the defer logfile regardless
* of DSN NOTIFY options, because those options don't apply to mailq(1)
* reports or to postmaster notifications.
*/
else {
/*
* Supply default action.
*/
my_dsn.action = "delayed";
if (mail_command_client(MAIL_CLASS_PRIVATE, var_defer_service,
SEND_ATTR_INT(MAIL_ATTR_NREQ, BOUNCE_CMD_APPEND),
SEND_ATTR_INT(MAIL_ATTR_FLAGS, flags),
SEND_ATTR_STR(MAIL_ATTR_QUEUEID, id),
SEND_ATTR_FUNC(rcpt_print, (void *) rcpt),
SEND_ATTR_FUNC(dsn_print, (void *) &my_dsn),
ATTR_TYPE_END) != 0)
msg_warn("%s: %s service failure", id, var_defer_service);
log_adhoc(id, stats, rcpt, relay, &my_dsn, "deferred");
/*
* Traced delivery.
*/
if (flags & DEL_REQ_FLAG_RECORD)
if (trace_append(flags, id, stats, rcpt, relay, &my_dsn) != 0)
msg_warn("%s: %s service failure", id, var_trace_service);
/*
* Notify the fast flush service. XXX Should not this belong in the
* bounce/defer daemon? Well, doing it here is more robust.
*/
if ((rcpt_domain = strrchr(rcpt->address, '@')) != 0
&& *++rcpt_domain != 0)
switch (flush_add(rcpt_domain, id)) {
case FLUSH_STAT_OK:
case FLUSH_STAT_DENY:
break;
default:
msg_warn("%s: %s service failure", id, var_flush_service);
break;
}
return (-1);
}
}
/* defer_flush - flush the defer log and deliver to the sender */
int defer_flush(int flags, const char *queue, const char *id,
const char *encoding, int smtputf8,
const char *sender, const char *dsn_envid,
int dsn_ret)
{
flags |= BOUNCE_FLAG_DELRCPT;
if (mail_command_client(MAIL_CLASS_PRIVATE, var_defer_service,
SEND_ATTR_INT(MAIL_ATTR_NREQ, BOUNCE_CMD_FLUSH),
SEND_ATTR_INT(MAIL_ATTR_FLAGS, flags),
SEND_ATTR_STR(MAIL_ATTR_QUEUE, queue),
SEND_ATTR_STR(MAIL_ATTR_QUEUEID, id),
SEND_ATTR_STR(MAIL_ATTR_ENCODING, encoding),
SEND_ATTR_INT(MAIL_ATTR_SMTPUTF8, smtputf8),
SEND_ATTR_STR(MAIL_ATTR_SENDER, sender),
SEND_ATTR_STR(MAIL_ATTR_DSN_ENVID, dsn_envid),
SEND_ATTR_INT(MAIL_ATTR_DSN_RET, dsn_ret),
ATTR_TYPE_END) == 0) {
return (0);
} else {
return (-1);
}
}
/* defer_warn - send a copy of the defer log to the sender as a warning bounce
* do not flush the log */
int defer_warn(int flags, const char *queue, const char *id,
const char *encoding, int smtputf8,
const char *sender, const char *envid, int dsn_ret)
{
if (mail_command_client(MAIL_CLASS_PRIVATE, var_defer_service,
SEND_ATTR_INT(MAIL_ATTR_NREQ, BOUNCE_CMD_WARN),
SEND_ATTR_INT(MAIL_ATTR_FLAGS, flags),
SEND_ATTR_STR(MAIL_ATTR_QUEUE, queue),
SEND_ATTR_STR(MAIL_ATTR_QUEUEID, id),
SEND_ATTR_STR(MAIL_ATTR_ENCODING, encoding),
SEND_ATTR_INT(MAIL_ATTR_SMTPUTF8, smtputf8),
SEND_ATTR_STR(MAIL_ATTR_SENDER, sender),
SEND_ATTR_STR(MAIL_ATTR_DSN_ENVID, envid),
SEND_ATTR_INT(MAIL_ATTR_DSN_RET, dsn_ret),
ATTR_TYPE_END) == 0) {
return (0);
} else {
return (-1);
}
}
/* defer_one - defer mail for one recipient */
int defer_one(int flags, const char *queue, const char *id,
const char *encoding, int smtputf8,
const char *sender, const char *dsn_envid,
int dsn_ret, MSG_STATS *stats, RECIPIENT *rcpt,
const char *relay, DSN *dsn)
{
DSN my_dsn = *dsn;
DSN *dsn_res;
/*
* Sanity check.
*/
if (my_dsn.status[0] != '4' || !dsn_valid(my_dsn.status)) {
msg_warn("defer_one: ignoring dsn code \"%s\"", my_dsn.status);
my_dsn.status = "4.0.0";
}
/*
* DSN filter (Postfix 3.0).
*/
if (delivery_status_filter != 0
&& (dsn_res = dsn_filter_lookup(delivery_status_filter, &my_dsn)) != 0) {
if (dsn_res->status[0] == '5')
return (bounce_one_intern(flags, queue, id, encoding, smtputf8,
sender, dsn_envid, dsn_ret, stats,
rcpt, relay, dsn_res));
my_dsn = *dsn_res;
}
return (defer_append_intern(flags, id, stats, rcpt, relay, &my_dsn));
}
|
