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internet_addressing.c
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1// This file contains functions which handle the mapping of Internet addresses
2// to users on the Citadel system.
3//
4// Copyright (c) 1987-2021 by the citadel.org team
5//
6// This program is open source software; you can redistribute it and/or modify
7// it under the terms of the GNU General Public License version 3.
8//
9// This program is distributed in the hope that it will be useful,
10// but WITHOUT ANY WARRANTY; without even the implied warranty of
11// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12// GNU General Public License for more details.
13
14#include "sysdep.h"
15#include <stdlib.h>
16#include <unistd.h>
17#include <stdio.h>
18#include <fcntl.h>
19#include <ctype.h>
20#include <signal.h>
21#include <pwd.h>
22#include <errno.h>
23#include <sys/types.h>
24#include <time.h>
25#include <sys/wait.h>
26#include <string.h>
27#include <limits.h>
28#include <libcitadel.h>
29#include "citadel.h"
30#include "server.h"
31#include "sysdep_decls.h"
32#include "citserver.h"
33#include "support.h"
34#include "config.h"
35#include "msgbase.h"
36#include "internet_addressing.h"
37#include "user_ops.h"
38#include "room_ops.h"
39#include "parsedate.h"
40#include "database.h"
41#include "ctdl_module.h"
42#ifdef HAVE_ICONV
43#include <iconv.h>
44
45// This is the non-define version in case it is needed for debugging
46#if 0
47inline void FindNextEnd (char *bptr, char *end)
48{
49 /* Find the next ?Q? */
50 end = strchr(bptr + 2, '?');
51 if (end == NULL) return NULL;
52 if (((*(end + 1) == 'B') || (*(end + 1) == 'Q')) &&
53 (*(end + 2) == '?')) {
54 /* skip on to the end of the cluster, the next ?= */
55 end = strstr(end + 3, "?=");
56 }
57 else
58 /* sort of half valid encoding, try to find an end. */
59 end = strstr(bptr, "?=");
60}
61#endif
62
63#define FindNextEnd(bptr, end) { \
64 end = strchr(bptr + 2, '?'); \
65 if (end != NULL) { \
66 if (((*(end + 1) == 'B') || (*(end + 1) == 'Q')) && (*(end + 2) == '?')) { \
67 end = strstr(end + 3, "?="); \
68 } else end = strstr(bptr, "?="); \
69 } \
70}
71
72// Handle subjects with RFC2047 encoding such as:
73// =?koi8-r?B?78bP0s3Mxc7JxSDXz9rE1dvO2c3JINvB0sHNySDP?=
74void utf8ify_rfc822_string(char *buf) {
75 char *start, *end, *next, *nextend, *ptr;
76 char newbuf[1024];
77 char charset[128];
78 char encoding[16];
79 char istr[1024];
80 iconv_t ic = (iconv_t)(-1) ;
81 char *ibuf; // Buffer of characters to be converted
82 char *obuf; // Buffer for converted characters
83 size_t ibuflen; // Length of input buffer
84 size_t obuflen; // Length of output buffer
85 char *isav; // Saved pointer to input buffer
86 char *osav; // Saved pointer to output buffer
87 int passes = 0;
88 int i, len, delta;
89 int illegal_non_rfc2047_encoding = 0;
90
91 // Sometimes, badly formed messages contain strings which were simply
92 // written out directly in some foreign character set instead of
93 // using RFC2047 encoding. This is illegal but we will attempt to
94 // handle it anyway by converting from a user-specified default
95 // charset to UTF-8 if we see any nonprintable characters.
96 len = strlen(buf);
97 for (i=0; i<len; ++i) {
98 if ((buf[i] < 32) || (buf[i] > 126)) {
99 illegal_non_rfc2047_encoding = 1;
100 i = len; // take a shortcut, it won't be more than one.
101 }
102 }
103 if (illegal_non_rfc2047_encoding) {
104 const char *default_header_charset = "iso-8859-1";
105 if ( (strcasecmp(default_header_charset, "UTF-8")) && (strcasecmp(default_header_charset, "us-ascii")) ) {
106 ctdl_iconv_open("UTF-8", default_header_charset, &ic);
107 if (ic != (iconv_t)(-1) ) {
108 ibuf = malloc(1024);
109 isav = ibuf;
110 safestrncpy(ibuf, buf, 1024);
111 ibuflen = strlen(ibuf);
112 obuflen = 1024;
113 obuf = (char *) malloc(obuflen);
114 osav = obuf;
115 iconv(ic, &ibuf, &ibuflen, &obuf, &obuflen);
116 osav[1024-obuflen] = 0;
117 strcpy(buf, osav);
118 free(osav);
119 iconv_close(ic);
120 free(isav);
121 }
122 }
123 }
124
125 // pre evaluate the first pair
126 nextend = end = NULL;
127 len = strlen(buf);
128 start = strstr(buf, "=?");
129 if (start != NULL)
130 FindNextEnd (start, end);
131
132 while ((start != NULL) && (end != NULL)) {
133 next = strstr(end, "=?");
134 if (next != NULL)
135 FindNextEnd(next, nextend);
136 if (nextend == NULL)
137 next = NULL;
138
139 // did we find two partitions
140 if ((next != NULL) && ((next - end) > 2)) {
141 ptr = end + 2;
142 while ((ptr < next) &&
143 (isspace(*ptr) ||
144 (*ptr == '\r') ||
145 (*ptr == '\n') ||
146 (*ptr == '\t')))
147 ptr ++;
148 // did we find a gab just filled with blanks?
149 if (ptr == next) {
150 memmove(end + 2, next, len - (next - start));
151
152 // now terminate the gab at the end
153 delta = (next - end) - 2;
154 len -= delta;
155 buf[len] = '\0';
156
157 // move next to its new location.
158 next -= delta;
159 nextend -= delta;
160 }
161 }
162 // our next-pair is our new first pair now.
163 start = next;
164 end = nextend;
165 }
166
167 // Now we handle foreign character sets properly encoded in RFC2047 format.
168 start = strstr(buf, "=?");
169 FindNextEnd((start != NULL)? start : buf, end);
170 while (start != NULL && end != NULL && end > start) {
171 extract_token(charset, start, 1, '?', sizeof charset);
172 extract_token(encoding, start, 2, '?', sizeof encoding);
173 extract_token(istr, start, 3, '?', sizeof istr);
174
175 ibuf = malloc(1024);
176 isav = ibuf;
177 if (!strcasecmp(encoding, "B")) { // base64
178 ibuflen = CtdlDecodeBase64(ibuf, istr, strlen(istr));
179 }
180 else if (!strcasecmp(encoding, "Q")) { // quoted-printable
181 size_t len;
182 unsigned long pos;
183
184 len = strlen(istr);
185 pos = 0;
186 while (pos < len) {
187 if (istr[pos] == '_') istr[pos] = ' ';
188 pos++;
189 }
190 ibuflen = CtdlDecodeQuotedPrintable(ibuf, istr, len);
191 }
192 else {
193 strcpy(ibuf, istr); // unknown encoding
194 ibuflen = strlen(istr);
195 }
196
197 ctdl_iconv_open("UTF-8", charset, &ic);
198 if (ic != (iconv_t)(-1) ) {
199 obuflen = 1024;
200 obuf = (char *) malloc(obuflen);
201 osav = obuf;
202 iconv(ic, &ibuf, &ibuflen, &obuf, &obuflen);
203 osav[1024-obuflen] = 0;
204
205 end = start;
206 end++;
207 strcpy(start, "");
208 remove_token(end, 0, '?');
209 remove_token(end, 0, '?');
210 remove_token(end, 0, '?');
211 remove_token(end, 0, '?');
212 strcpy(end, &end[1]);
213
214 snprintf(newbuf, sizeof newbuf, "%s%s%s", buf, osav, end);
215 strcpy(buf, newbuf);
216 free(osav);
217 iconv_close(ic);
218 }
219 else {
220 end = start;
221 end++;
222 strcpy(start, "");
223 remove_token(end, 0, '?');
224 remove_token(end, 0, '?');
225 remove_token(end, 0, '?');
226 remove_token(end, 0, '?');
227 strcpy(end, &end[1]);
228
229 snprintf(newbuf, sizeof newbuf, "%s(unreadable)%s", buf, end);
230 strcpy(buf, newbuf);
231 }
232
233 free(isav);
234
235 // Since spammers will go to all sorts of absurd lengths to get their
236 // messages through, there are LOTS of corrupt headers out there.
237 // So, prevent a really badly formed RFC2047 header from throwing
238 // this function into an infinite loop.
239 ++passes;
240 if (passes > 20) return;
241
242 start = strstr(buf, "=?");
243 FindNextEnd((start != NULL)? start : buf, end);
244 }
245
246}
247#else
248inline void utf8ify_rfc822_string(char *a){};
249
250#endif
251
252
253char *inetcfg = NULL;
254
255// Return nonzero if the supplied name is an alias for this host.
256int CtdlHostAlias(char *fqdn) {
257 int config_lines;
258 int i;
259 char buf[256];
260 char host[256], type[256];
261 int found = 0;
262
263 if (fqdn == NULL) return(hostalias_nomatch);
264 if (IsEmptyStr(fqdn)) return(hostalias_nomatch);
265 if (!strcasecmp(fqdn, "localhost")) return(hostalias_localhost);
266 if (!strcasecmp(fqdn, CtdlGetConfigStr("c_fqdn"))) return(hostalias_localhost);
267 if (!strcasecmp(fqdn, CtdlGetConfigStr("c_nodename"))) return(hostalias_localhost);
268 if (inetcfg == NULL) return(hostalias_nomatch);
269
270 config_lines = num_tokens(inetcfg, '\n');
271 for (i=0; i<config_lines; ++i) {
272 extract_token(buf, inetcfg, i, '\n', sizeof buf);
273 extract_token(host, buf, 0, '|', sizeof host);
274 extract_token(type, buf, 1, '|', sizeof type);
275
276 found = 0;
277
278 // Process these in a specific order, in case there are multiple matches.
279 // We want localhost to override masq, for example.
280
281 if ( (!strcasecmp(type, "masqdomain")) && (!strcasecmp(fqdn, host))) {
282 found = hostalias_masq;
283 }
284
285 if ( (!strcasecmp(type, "localhost")) && (!strcasecmp(fqdn, host))) {
286 found = hostalias_localhost;
287 }
288
289 // "directory" used to be a distributed version of "localhost" but they're both the same now
290 if ( (!strcasecmp(type, "directory")) && (!strcasecmp(fqdn, host))) {
291 found = hostalias_localhost;
292 }
293
294 if (found) return(found);
295 }
296 return(hostalias_nomatch);
297}
298
299
300// Determine whether a given Internet address belongs to the current user
301int CtdlIsMe(char *addr, int addr_buf_len) {
302 struct recptypes *recp;
303 int i;
304
305 recp = validate_recipients(addr, NULL, 0);
306 if (recp == NULL) return(0);
307
308 if (recp->num_local == 0) {
309 free_recipients(recp);
310 return(0);
311 }
312
313 for (i=0; i<recp->num_local; ++i) {
314 extract_token(addr, recp->recp_local, i, '|', addr_buf_len);
315 if (!strcasecmp(addr, CC->user.fullname)) {
316 free_recipients(recp);
317 return(1);
318 }
319 }
320
321 free_recipients(recp);
322 return(0);
323}
324
325
326// If the last item in a list of recipients was truncated to a partial address,
327// remove it completely in order to avoid choking library functions.
329{
330 if (!str) return;
331 if (num_tokens(str, ',') < 2) return;
332
333 int len = strlen(str);
334 if (len < 900) return;
335 if (len > 998) str[998] = 0;
336
337 char *cptr = strrchr(str, ',');
338 if (!cptr) return;
339
340 char *lptr = strchr(cptr, '<');
341 char *rptr = strchr(cptr, '>');
342
343 if ( (lptr) && (rptr) && (rptr > lptr) ) return;
344
345 *cptr = 0;
346}
347
348
349// This function is self explanatory.
350// (What can I say, I'm in a weird mood today...)
352 char *ptr;
353 if (!name) return;
354
355 for (ptr=name; *ptr; ++ptr) {
356 while ( (isspace(*ptr)) && (*(ptr+1)=='@') ) {
357 strcpy(ptr, ptr+1);
358 if (ptr > name) --ptr;
359 }
360 while ( (*ptr=='@') && (*(ptr+1)!=0) && (isspace(*(ptr+1))) ) {
361 strcpy(ptr+1, ptr+2);
362 }
363 }
364}
365
366
367// values that can be returned by expand_aliases()
368enum {
369 EA_ERROR, // Can't send message due to bad address
370 EA_MULTIPLE, // Alias expanded into multiple recipients -- run me again!
371 EA_LOCAL, // Local message, do no network processing
372 EA_INTERNET, // Convert msg and send as Internet mail
373 EA_SKIP // This recipient has been invalidated -- skip it!
375
376
377// Process alias and routing info for email addresses
378int expand_aliases(char *name, char *aliases) {
379 int a;
380 char aaa[SIZ];
381 int at = 0;
382
383 if (aliases) {
384 int num_aliases = num_tokens(aliases, '\n');
385 for (a=0; a<num_aliases; ++a) {
386 extract_token(aaa, aliases, a, '\n', sizeof aaa);
387 char *bar = strchr(aaa, '|');
388 if (bar) {
389 bar[0] = 0;
390 ++bar;
391 striplt(aaa);
392 striplt(bar);
393 if ( (!IsEmptyStr(aaa)) && (!strcasecmp(name, aaa)) ) {
394 syslog(LOG_DEBUG, "internet_addressing: global alias <%s> to <%s>", name, bar);
395 strcpy(name, bar);
396 }
397 }
398 }
399 if (strchr(name, ',')) {
400 return(EA_MULTIPLE);
401 }
402 }
403
404 char original_name[256]; // Now go for the regular aliases
405 safestrncpy(original_name, name, sizeof original_name);
406
407 // should these checks still be here, or maybe move them to split_recps() ?
408 striplt(name);
410 stripallbut(name, '<', '>');
411
412 // Hit the email address directory
413 if (CtdlDirectoryLookup(aaa, name, sizeof aaa) == 0) {
414 strcpy(name, aaa);
415 }
416
417 if (strcasecmp(original_name, name)) {
418 syslog(LOG_INFO, "internet_addressing: directory alias <%s> to <%s>", original_name, name);
419 }
420
421 // Change "user @ xxx" to "user" if xxx is an alias for this host
422 for (a=0; name[a] != '\0'; ++a) {
423 if (name[a] == '@') {
424 if (CtdlHostAlias(&name[a+1]) == hostalias_localhost) {
425 name[a] = 0;
426 syslog(LOG_DEBUG, "internet_addressing: host is local, recipient is <%s>", name);
427 break;
428 }
429 }
430 }
431
432 // Is this a local or remote recipient?
433 at = haschar(name, '@');
434 if (at == 0) {
435 return(EA_LOCAL); // no @'s = local address
436 }
437 else if (at == 1) {
438 return(EA_INTERNET); // one @ = internet address
439 }
440 else {
441 return(EA_ERROR); // more than one @ = badly formed address
442 }
443}
444
445
446// Return a supplied list of email addresses as an array, removing superfluous information and syntax.
447// If an existing Array is supplied as "append_to" it will do so; otherwise a new Array is allocated.
448Array *split_recps(char *addresses, Array *append_to) {
449
450 if (IsEmptyStr(addresses)) { // nothing supplied, nothing returned
451 return(NULL);
452 }
453
454 // Copy the supplied address list into our own memory space, because we are going to modify it.
455 char *a = strdup(addresses);
456 if (a == NULL) {
457 syslog(LOG_ERR, "internet_addressing: malloc() failed: %m");
458 return(NULL);
459 }
460
461 // Strip out anything in double quotes
462 char *l = NULL;
463 char *r = NULL;
464 do {
465 l = strchr(a, '\"');
466 r = strrchr(a, '\"');
467 if (r > l) {
468 strcpy(l, r+1);
469 }
470 } while (r > l);
471
472 // Transform all qualifying delimiters to commas
473 char *t;
474 for (t=a; t[0]; ++t) {
475 if ((t[0]==';') || (t[0]=='|')) {
476 t[0]=',';
477 }
478 }
479
480 // Tokenize the recipients into an array. No single recipient should be larger than 256 bytes.
481 Array *recipients_array = NULL;
482 if (append_to) {
483 recipients_array = append_to; // Append to an existing array of recipients
484 }
485 else {
486 recipients_array = array_new(256); // This is a new array of recipients
487 }
488
489 int num_addresses = num_tokens(a, ',');
490 int i;
491 for (i=0; i<num_addresses; ++i) {
492 char this_address[256];
493 extract_token(this_address, a, i, ',', sizeof this_address);
494 striplt(this_address); // strip leading and trailing whitespace
495 stripout(this_address, '(', ')'); // remove any portion in parentheses
496 stripallbut(this_address, '<', '>'); // if angle brackets are present, keep only what is inside them
497 if (!IsEmptyStr(this_address)) {
498 array_append(recipients_array, this_address);
499 }
500 }
501
502 free(a); // We don't need this buffer anymore.
503 return(recipients_array); // Return the completed array to the caller.
504}
505
506
507// Validate recipients, count delivery types and errors, and handle aliasing
508//
509// Returns 0 if all addresses are ok, ret->num_error = -1 if no addresses
510// were specified, or the number of addresses found invalid.
511//
512// Caller needs to free the result using free_recipients()
513//
514struct recptypes *validate_recipients(char *supplied_recipients, const char *RemoteIdentifier, int Flags) {
515 struct recptypes *ret;
516 char *recipients = NULL;
517 char append[SIZ];
518 long len;
519 int mailtype;
520 int invalid;
521 struct ctdluser tempUS;
522 struct ctdlroom original_room;
523 int err = 0;
524 char errmsg[SIZ];
525 char *org_recp;
526 char this_recp[256];
527
528 ret = (struct recptypes *) malloc(sizeof(struct recptypes)); // Initialize
529 if (ret == NULL) return(NULL);
530 memset(ret, 0, sizeof(struct recptypes)); // set all values to null/zero
531
532 if (supplied_recipients == NULL) {
533 recipients = strdup("");
534 }
535 else {
536 recipients = strdup(supplied_recipients);
537 }
538
539 len = strlen(recipients) + 1024; // allocate memory
540 ret->errormsg = malloc(len);
541 ret->recp_local = malloc(len);
542 ret->recp_internet = malloc(len);
543 ret->recp_room = malloc(len);
544 ret->display_recp = malloc(len);
545 ret->recp_orgroom = malloc(len);
546
547 ret->errormsg[0] = 0;
548 ret->recp_local[0] = 0;
549 ret->recp_internet[0] = 0;
550 ret->recp_room[0] = 0;
551 ret->recp_orgroom[0] = 0;
552 ret->display_recp[0] = 0;
554
555 Array *recp_array = split_recps(supplied_recipients, NULL);
556
557 char *aliases = CtdlGetSysConfig(GLOBAL_ALIASES); // First hit the Global Alias Table
558
559 int r;
560 for (r=0; (recp_array && r<array_len(recp_array)); ++r) {
561 org_recp = (char *)array_get_element_at(recp_array, r);
562 strncpy(this_recp, org_recp, sizeof this_recp);
563
564 int i;
565 for (i=0; i<3; ++i) { // pass three times through the aliaser
566 mailtype = expand_aliases(this_recp, aliases);
567
568 // If an alias expanded to multiple recipients, strip off those recipients and append them
569 // to the end of the array. This loop will hit those again when it gets there.
570 if (mailtype == EA_MULTIPLE) {
571 recp_array = split_recps(this_recp, recp_array);
572 }
573 }
574
575 // This loop searches for duplicate recipients in the final list and marks them to be skipped.
576 int j;
577 for (j=0; j<r; ++j) {
578 if (!strcasecmp(this_recp, (char *)array_get_element_at(recp_array, j) )) {
579 mailtype = EA_SKIP;
580 }
581 }
582
583 syslog(LOG_DEBUG, "Recipient #%d of type %d is <%s>", r, mailtype, this_recp);
584 invalid = 0;
585 errmsg[0] = 0;
586 switch(mailtype) {
587 case EA_LOCAL: // There are several types of "local" recipients.
588
589 // Old BBS conventions require mail to "sysop" to go somewhere. Send it to the admin room.
590 if (!strcasecmp(this_recp, "sysop")) {
591 ++ret->num_room;
592 strcpy(this_recp, CtdlGetConfigStr("c_aideroom"));
593 if (!IsEmptyStr(ret->recp_room)) {
594 strcat(ret->recp_room, "|");
595 }
596 strcat(ret->recp_room, this_recp);
597 }
598
599 // This handles rooms which can receive posts via email.
600 else if (!strncasecmp(this_recp, "room_", 5)) {
601 original_room = CC->room; // Remember where we parked
602
603 char mail_to_room[ROOMNAMELEN];
604 char *m;
605 strncpy(mail_to_room, &this_recp[5], sizeof mail_to_room);
606 for (m = mail_to_room; *m; ++m) {
607 if (m[0] == '_') m[0]=' ';
608 }
609 if (!CtdlGetRoom(&CC->room, mail_to_room)) { // Find the room they asked for
610
611 err = CtdlDoIHavePermissionToPostInThisRoom( // check for write permissions to room
612 errmsg,
613 sizeof errmsg,
614 RemoteIdentifier,
615 Flags,
616 0 // 0 means "this is not a reply"
617 );
618 if (err) {
619 ++ret->num_error;
620 invalid = 1;
621 }
622 else {
623 ++ret->num_room;
624 if (!IsEmptyStr(ret->recp_room)) {
625 strcat(ret->recp_room, "|");
626 }
627 strcat(ret->recp_room, CC->room.QRname);
628
629 if (!IsEmptyStr(ret->recp_orgroom)) {
630 strcat(ret->recp_orgroom, "|");
631 }
632 strcat(ret->recp_orgroom, this_recp);
633
634 }
635 }
636 else { // no such room exists
637 ++ret->num_error;
638 invalid = 1;
639 }
640
641 // Restore this session's original room location.
642 CC->room = original_room;
643
644 }
645
646 // This handles the most common case, which is mail to a user's inbox.
647 else if (CtdlGetUser(&tempUS, this_recp) == 0) {
648 ++ret->num_local;
649 strcpy(this_recp, tempUS.fullname);
650 if (!IsEmptyStr(ret->recp_local)) {
651 strcat(ret->recp_local, "|");
652 }
653 strcat(ret->recp_local, this_recp);
654 }
655
656 // No match for this recipient
657 else {
658 ++ret->num_error;
659 invalid = 1;
660 }
661 break;
662 case EA_INTERNET:
663 // Yes, you're reading this correctly: if the target domain points back to the local system,
664 // the address is invalid. That's because if the address were valid, we would have
665 // already translated it to a local address by now.
666 if (IsDirectory(this_recp, 0)) {
667 ++ret->num_error;
668 invalid = 1;
669 }
670 else {
671 ++ret->num_internet;
672 if (!IsEmptyStr(ret->recp_internet)) {
673 strcat(ret->recp_internet, "|");
674 }
675 strcat(ret->recp_internet, this_recp);
676 }
677 break;
678 case EA_MULTIPLE:
679 case EA_SKIP:
680 // no action required, anything in this slot has already been processed elsewhere
681 break;
682 case EA_ERROR:
683 ++ret->num_error;
684 invalid = 1;
685 break;
686 }
687 if (invalid) {
688 if (IsEmptyStr(errmsg)) {
689 snprintf(append, sizeof append, "Invalid recipient: %s", this_recp);
690 }
691 else {
692 snprintf(append, sizeof append, "%s", errmsg);
693 }
694 if ( (strlen(ret->errormsg) + strlen(append) + 3) < SIZ) {
695 if (!IsEmptyStr(ret->errormsg)) {
696 strcat(ret->errormsg, "; ");
697 }
698 strcat(ret->errormsg, append);
699 }
700 }
701 else {
702 if (IsEmptyStr(ret->display_recp)) {
703 strcpy(append, this_recp);
704 }
705 else {
706 snprintf(append, sizeof append, ", %s", this_recp);
707 }
708 if ( (strlen(ret->display_recp)+strlen(append)) < SIZ) {
709 strcat(ret->display_recp, append);
710 }
711 }
712 }
713
714 if (aliases != NULL) { // ok, we're done with the global alias list now
715 free(aliases);
716 }
717
718 if ( (ret->num_local + ret->num_internet + ret->num_room + ret->num_error) == 0) {
719 ret->num_error = (-1);
720 strcpy(ret->errormsg, "No recipients specified.");
721 }
722
723 syslog(LOG_DEBUG, "internet_addressing: validate_recipients() = %d local, %d room, %d SMTP, %d error",
724 ret->num_local, ret->num_room, ret->num_internet, ret->num_error
725 );
726
727 free(recipients);
728 if (recp_array) {
729 array_free(recp_array);
730 }
731
732 return(ret);
733}
734
735
736// Destructor for recptypes
737void free_recipients(struct recptypes *valid) {
738
739 if (valid == NULL) {
740 return;
741 }
742
743 if (valid->recptypes_magic != RECPTYPES_MAGIC) {
744 syslog(LOG_ERR, "internet_addressing: attempt to call free_recipients() on some other data type!");
745 abort();
746 }
747
748 if (valid->errormsg != NULL) free(valid->errormsg);
749 if (valid->recp_local != NULL) free(valid->recp_local);
750 if (valid->recp_internet != NULL) free(valid->recp_internet);
751 if (valid->recp_room != NULL) free(valid->recp_room);
752 if (valid->recp_orgroom != NULL) free(valid->recp_orgroom);
753 if (valid->display_recp != NULL) free(valid->display_recp);
754 if (valid->bounce_to != NULL) free(valid->bounce_to);
755 if (valid->envelope_from != NULL) free(valid->envelope_from);
756 if (valid->sending_room != NULL) free(valid->sending_room);
757 free(valid);
758}
759
760
761char *qp_encode_email_addrs(char *source) {
762 char *user, *node, *name;
763 const char headerStr[] = "=?UTF-8?Q?";
764 char *Encoded;
765 char *EncodedName;
766 char *nPtr;
767 int need_to_encode = 0;
768 long SourceLen;
769 long EncodedMaxLen;
770 long nColons = 0;
771 long *AddrPtr;
772 long *AddrUtf8;
773 long nAddrPtrMax = 50;
774 long nmax;
775 int InQuotes = 0;
776 int i, n;
777
778 if (source == NULL) return source;
779 if (IsEmptyStr(source)) return source;
780 syslog(LOG_DEBUG, "internet_addressing: qp_encode_email_addrs <%s>", source);
781
782 AddrPtr = malloc (sizeof (long) * nAddrPtrMax);
783 AddrUtf8 = malloc (sizeof (long) * nAddrPtrMax);
784 memset(AddrUtf8, 0, sizeof (long) * nAddrPtrMax);
785 *AddrPtr = 0;
786 i = 0;
787 while (!IsEmptyStr (&source[i])) {
788 if (nColons >= nAddrPtrMax){
789 long *ptr;
790
791 ptr = (long *) malloc(sizeof (long) * nAddrPtrMax * 2);
792 memcpy (ptr, AddrPtr, sizeof (long) * nAddrPtrMax);
793 free (AddrPtr), AddrPtr = ptr;
794
795 ptr = (long *) malloc(sizeof (long) * nAddrPtrMax * 2);
796 memset(&ptr[nAddrPtrMax], 0, sizeof (long) * nAddrPtrMax);
797
798 memcpy (ptr, AddrUtf8, sizeof (long) * nAddrPtrMax);
799 free (AddrUtf8), AddrUtf8 = ptr;
800 nAddrPtrMax *= 2;
801 }
802 if (((unsigned char) source[i] < 32) || ((unsigned char) source[i] > 126)) {
803 need_to_encode = 1;
804 AddrUtf8[nColons] = 1;
805 }
806 if (source[i] == '"') {
807 InQuotes = !InQuotes;
808 }
809 if (!InQuotes && source[i] == ',') {
810 AddrPtr[nColons] = i;
811 nColons++;
812 }
813 i++;
814 }
815 if (need_to_encode == 0) {
816 free(AddrPtr);
817 free(AddrUtf8);
818 return source;
819 }
820
821 SourceLen = i;
822 EncodedMaxLen = nColons * (sizeof(headerStr) + 3) + SourceLen * 3;
823 Encoded = (char*) malloc (EncodedMaxLen);
824
825 for (i = 0; i < nColons; i++) {
826 source[AddrPtr[i]++] = '\0';
827 }
828 // TODO: if libidn, this might get larger
829 user = malloc(SourceLen + 1);
830 node = malloc(SourceLen + 1);
831 name = malloc(SourceLen + 1);
832
833 nPtr = Encoded;
834 *nPtr = '\0';
835 for (i = 0; i < nColons && nPtr != NULL; i++) {
836 nmax = EncodedMaxLen - (nPtr - Encoded);
837 if (AddrUtf8[i]) {
838 process_rfc822_addr(&source[AddrPtr[i]], user, node, name);
839 // TODO: libIDN here !
840 if (IsEmptyStr(name)) {
841 n = snprintf(nPtr, nmax, (i==0)?"%s@%s" : ",%s@%s", user, node);
842 }
843 else {
844 EncodedName = rfc2047encode(name, strlen(name));
845 n = snprintf(nPtr, nmax, (i==0)?"%s <%s@%s>" : ",%s <%s@%s>", EncodedName, user, node);
846 free(EncodedName);
847 }
848 }
849 else {
850 n = snprintf(nPtr, nmax, (i==0)?"%s" : ",%s", &source[AddrPtr[i]]);
851 }
852 if (n > 0 )
853 nPtr += n;
854 else {
855 char *ptr, *nnPtr;
856 ptr = (char*) malloc(EncodedMaxLen * 2);
857 memcpy(ptr, Encoded, EncodedMaxLen);
858 nnPtr = ptr + (nPtr - Encoded), nPtr = nnPtr;
859 free(Encoded), Encoded = ptr;
860 EncodedMaxLen *= 2;
861 i--; // do it once more with properly lengthened buffer
862 }
863 }
864 for (i = 0; i < nColons; i++)
865 source[--AddrPtr[i]] = ',';
866
867 free(user);
868 free(node);
869 free(name);
870 free(AddrUtf8);
871 free(AddrPtr);
872 return Encoded;
873}
874
875
876// Unfold a multi-line field into a single line, removing multi-whitespaces
877void unfold_rfc822_field(char **field, char **FieldEnd)
878{
879 int quote = 0;
880 char *pField = *field;
881 char *sField;
882 char *pFieldEnd = *FieldEnd;
883
884 while (isspace(*pField))
885 pField++;
886 // remove leading/trailing whitespace
887 ;
888
889 while (isspace(*pFieldEnd))
890 pFieldEnd --;
891
892 *FieldEnd = pFieldEnd;
893 // convert non-space whitespace to spaces, and remove double blanks
894 for (sField = *field = pField;
895 sField < pFieldEnd;
896 pField++, sField++)
897 {
898 if ((*sField=='\r') || (*sField=='\n'))
899 {
900 int offset = 1;
901 while ( ( (*(sField + offset) == '\r') || (*(sField + offset) == '\n' )) && (sField + offset < pFieldEnd) ) {
902 offset ++;
903 }
904 sField += offset;
905 *pField = *sField;
906 }
907 else {
908 if (*sField=='\"') quote = 1 - quote;
909 if (!quote) {
910 if (isspace(*sField)) {
911 *pField = ' ';
912 pField++;
913 sField++;
914
915 while ((sField < pFieldEnd) &&
916 isspace(*sField))
917 sField++;
918 *pField = *sField;
919 }
920 else *pField = *sField;
921 }
922 else *pField = *sField;
923 }
924 }
925 *pField = '\0';
926 *FieldEnd = pField - 1;
927}
928
929
930// Split an RFC822-style address into userid, host, and full name
931//
932// Note: This still handles obsolete address syntaxes such as user%node@node and ...node!user
933// We should probably remove that.
934void process_rfc822_addr(const char *rfc822, char *user, char *node, char *name) {
935 int a;
936
937 strcpy(user, "");
938 strcpy(node, CtdlGetConfigStr("c_fqdn"));
939 strcpy(name, "");
940
941 if (rfc822 == NULL) return;
942
943 // extract full name - first, it's From minus <userid>
944 strcpy(name, rfc822);
945 stripout(name, '<', '>');
946
947 // strip anything to the left of a bang
948 while ((!IsEmptyStr(name)) && (haschar(name, '!') > 0))
949 strcpy(name, &name[1]);
950
951 // and anything to the right of a @ or %
952 for (a = 0; name[a] != '\0'; ++a) {
953 if (name[a] == '@') {
954 name[a] = 0;
955 break;
956 }
957 if (name[a] == '%') {
958 name[a] = 0;
959 break;
960 }
961 }
962
963 // but if there are parentheses, that changes the rules...
964 if ((haschar(rfc822, '(') == 1) && (haschar(rfc822, ')') == 1)) {
965 strcpy(name, rfc822);
966 stripallbut(name, '(', ')');
967 }
968
969 // but if there are a set of quotes, that supersedes everything
970 if (haschar(rfc822, 34) == 2) {
971 strcpy(name, rfc822);
972 while ((!IsEmptyStr(name)) && (name[0] != 34)) {
973 strcpy(&name[0], &name[1]);
974 }
975 strcpy(&name[0], &name[1]);
976 for (a = 0; name[a] != '\0'; ++a)
977 if (name[a] == 34) {
978 name[a] = 0;
979 break;
980 }
981 }
982 // extract user id
983 strcpy(user, rfc822);
984
985 // first get rid of anything in parens
986 stripout(user, '(', ')');
987
988 // if there's a set of angle brackets, strip it down to that
989 if ((haschar(user, '<') == 1) && (haschar(user, '>') == 1)) {
990 stripallbut(user, '<', '>');
991 }
992
993 // strip anything to the left of a bang
994 while ((!IsEmptyStr(user)) && (haschar(user, '!') > 0))
995 strcpy(user, &user[1]);
996
997 // and anything to the right of a @ or %
998 for (a = 0; user[a] != '\0'; ++a) {
999 if (user[a] == '@') {
1000 user[a] = 0;
1001 break;
1002 }
1003 if (user[a] == '%') {
1004 user[a] = 0;
1005 break;
1006 }
1007 }
1008
1009
1010 // extract node name
1011 strcpy(node, rfc822);
1012
1013 // first get rid of anything in parens
1014 stripout(node, '(', ')');
1015
1016 // if there's a set of angle brackets, strip it down to that
1017 if ((haschar(node, '<') == 1) && (haschar(node, '>') == 1)) {
1018 stripallbut(node, '<', '>');
1019 }
1020
1021 // If no node specified, tack ours on instead
1022 if (
1023 (haschar(node, '@')==0)
1024 && (haschar(node, '%')==0)
1025 && (haschar(node, '!')==0)
1026 ) {
1027 strcpy(node, CtdlGetConfigStr("c_nodename"));
1028 }
1029 else {
1030
1031 // strip anything to the left of a @
1032 while ((!IsEmptyStr(node)) && (haschar(node, '@') > 0))
1033 strcpy(node, &node[1]);
1034
1035 // strip anything to the left of a %
1036 while ((!IsEmptyStr(node)) && (haschar(node, '%') > 0))
1037 strcpy(node, &node[1]);
1038
1039 // reduce multiple system bang paths to node!user
1040 while ((!IsEmptyStr(node)) && (haschar(node, '!') > 1))
1041 strcpy(node, &node[1]);
1042
1043 // now get rid of the user portion of a node!user string
1044 for (a = 0; node[a] != '\0'; ++a)
1045 if (node[a] == '!') {
1046 node[a] = 0;
1047 break;
1048 }
1049 }
1050
1051 // strip leading and trailing spaces in all strings
1052 striplt(user);
1053 striplt(node);
1054 striplt(name);
1055
1056 // If we processed a string that had the address in angle brackets
1057 // but no name outside the brackets, we now have an empty name. In
1058 // this case, use the user portion of the address as the name.
1059 if ((IsEmptyStr(name)) && (!IsEmptyStr(user))) {
1060 strcpy(name, user);
1061 }
1062}
1063
1064
1065// convert_field() is a helper function for convert_internet_message().
1066// Given start/end positions for an rfc822 field, it converts it to a Citadel
1067// field if it wants to, and unfolds it if necessary.
1068//
1069// Returns 1 if the field was converted and inserted into the Citadel message
1070// structure, implying that the source field should be removed from the
1071// message text.
1072int convert_field(struct CtdlMessage *msg, const char *beg, const char *end) {
1073 char *key, *value, *valueend;
1074 long len;
1075 const char *pos;
1076 int i;
1077 const char *colonpos = NULL;
1078 int processed = 0;
1079 char user[1024];
1080 char node[1024];
1081 char name[1024];
1082 char addr[1024];
1083 time_t parsed_date;
1084 long valuelen;
1085
1086 for (pos = end; pos >= beg; pos--) {
1087 if (*pos == ':') colonpos = pos;
1088 }
1089
1090 if (colonpos == NULL) return(0); /* no colon? not a valid header line */
1091
1092 len = end - beg;
1093 key = malloc(len + 2);
1094 memcpy(key, beg, len + 1);
1095 key[len] = '\0';
1096 valueend = key + len;
1097 * ( key + (colonpos - beg) ) = '\0';
1098 value = &key[(colonpos - beg) + 1];
1099 // printf("Header: [%s]\nValue: [%s]\n", key, value);
1100 unfold_rfc822_field(&value, &valueend);
1101 valuelen = valueend - value + 1;
1102 // printf("UnfoldedValue: [%s]\n", value);
1103
1104 // Here's the big rfc822-to-citadel loop.
1105
1106 // Date/time is converted into a unix timestamp. If the conversion
1107 // fails, we replace it with the time the message arrived locally.
1108 if (!strcasecmp(key, "Date")) {
1109 parsed_date = parsedate(value);
1110 if (parsed_date < 0L) parsed_date = time(NULL);
1111
1112 if (CM_IsEmpty(msg, eTimestamp))
1113 CM_SetFieldLONG(msg, eTimestamp, parsed_date);
1114 processed = 1;
1115 }
1116
1117 else if (!strcasecmp(key, "From")) {
1118 process_rfc822_addr(value, user, node, name);
1119 syslog(LOG_DEBUG, "internet_addressing: converted to <%s@%s> (%s)", user, node, name);
1120 snprintf(addr, sizeof(addr), "%s@%s", user, node);
1121 if (CM_IsEmpty(msg, eAuthor) && !IsEmptyStr(name)) {
1122 CM_SetField(msg, eAuthor, name, -1);
1123 }
1124 if (CM_IsEmpty(msg, erFc822Addr) && !IsEmptyStr(addr)) {
1125 CM_SetField(msg, erFc822Addr, addr, -1);
1126 }
1127 processed = 1;
1128 }
1129
1130 else if (!strcasecmp(key, "Subject")) {
1131 if (CM_IsEmpty(msg, eMsgSubject))
1132 CM_SetField(msg, eMsgSubject, value, valuelen);
1133 processed = 1;
1134 }
1135
1136 else if (!strcasecmp(key, "List-ID")) {
1137 if (CM_IsEmpty(msg, eListID))
1138 CM_SetField(msg, eListID, value, valuelen);
1139 processed = 1;
1140 }
1141
1142 else if (!strcasecmp(key, "To")) {
1143 if (CM_IsEmpty(msg, eRecipient))
1144 CM_SetField(msg, eRecipient, value, valuelen);
1145 processed = 1;
1146 }
1147
1148 else if (!strcasecmp(key, "CC")) {
1149 if (CM_IsEmpty(msg, eCarbonCopY))
1150 CM_SetField(msg, eCarbonCopY, value, valuelen);
1151 processed = 1;
1152 }
1153
1154 else if (!strcasecmp(key, "Message-ID")) {
1155 if (!CM_IsEmpty(msg, emessageId)) {
1156 syslog(LOG_WARNING, "internet_addressing: duplicate message id");
1157 }
1158 else {
1159 char *pValue;
1160 long pValueLen;
1161
1162 pValue = value;
1163 pValueLen = valuelen;
1164 // Strip angle brackets
1165 while (haschar(pValue, '<') > 0) {
1166 pValue ++;
1167 pValueLen --;
1168 }
1169
1170 for (i = 0; i <= pValueLen; ++i)
1171 if (pValue[i] == '>') {
1172 pValueLen = i;
1173 break;
1174 }
1175
1176 CM_SetField(msg, emessageId, pValue, pValueLen);
1177 }
1178
1179 processed = 1;
1180 }
1181
1182 else if (!strcasecmp(key, "Return-Path")) {
1183 if (CM_IsEmpty(msg, eMessagePath))
1184 CM_SetField(msg, eMessagePath, value, valuelen);
1185 processed = 1;
1186 }
1187
1188 else if (!strcasecmp(key, "Envelope-To")) {
1189 if (CM_IsEmpty(msg, eenVelopeTo))
1190 CM_SetField(msg, eenVelopeTo, value, valuelen);
1191 processed = 1;
1192 }
1193
1194 else if (!strcasecmp(key, "References")) {
1195 CM_SetField(msg, eWeferences, value, valuelen);
1196 processed = 1;
1197 }
1198
1199 else if (!strcasecmp(key, "Reply-To")) {
1200 CM_SetField(msg, eReplyTo, value, valuelen);
1201 processed = 1;
1202 }
1203
1204 else if (!strcasecmp(key, "In-reply-to")) {
1205 if (CM_IsEmpty(msg, eWeferences)) // References: supersedes In-reply-to:
1206 CM_SetField(msg, eWeferences, value, valuelen);
1207 processed = 1;
1208 }
1209
1210
1211
1212 // Clean up and move on.
1213 free(key); // Don't free 'value', it's actually the same buffer
1214 return processed;
1215}
1216
1217
1218// Convert RFC822 references format (References) to Citadel references format (Weferences)
1220 int bracket_nesting = 0;
1221 char *ptr = str;
1222 char *moveptr = NULL;
1223 char ch;
1224
1225 while(*ptr) {
1226 ch = *ptr;
1227 if (ch == '>') {
1228 --bracket_nesting;
1229 if (bracket_nesting < 0) bracket_nesting = 0;
1230 }
1231 if ((ch == '>') && (bracket_nesting == 0) && (*(ptr+1)) && (ptr>str) ) {
1232 *ptr = '|';
1233 ++ptr;
1234 }
1235 else if (bracket_nesting > 0) {
1236 ++ptr;
1237 }
1238 else {
1239 moveptr = ptr;
1240 while (*moveptr) {
1241 *moveptr = *(moveptr+1);
1242 ++moveptr;
1243 }
1244 }
1245 if (ch == '<') ++bracket_nesting;
1246 }
1247
1248}
1249
1250
1251// Convert an RFC822 message (headers + body) to a CtdlMessage structure.
1252// NOTE: the supplied buffer becomes part of the CtdlMessage structure, and
1253// will be deallocated when CM_Free() is called. Therefore, the
1254// supplied buffer should be DEREFERENCED. It should not be freed or used
1255// again.
1257 StrBuf *RFCBuf = NewStrBufPlain(rfc822, -1);
1258 free (rfc822);
1259 return convert_internet_message_buf(&RFCBuf);
1260}
1261
1262
1264{
1265 struct CtdlMessage *msg;
1266 const char *pos, *beg, *end, *totalend;
1267 int done, alldone = 0;
1268 int converted;
1269 StrBuf *OtherHeaders;
1270
1271 msg = malloc(sizeof(struct CtdlMessage));
1272 if (msg == NULL) return msg;
1273
1274 memset(msg, 0, sizeof(struct CtdlMessage));
1275 msg->cm_magic = CTDLMESSAGE_MAGIC; // self check
1276 msg->cm_anon_type = 0; // never anonymous
1277 msg->cm_format_type = FMT_RFC822; // internet message
1278
1279 pos = ChrPtr(*rfc822);
1280 totalend = pos + StrLength(*rfc822);
1281 done = 0;
1282 OtherHeaders = NewStrBufPlain(NULL, StrLength(*rfc822));
1283
1284 while (!alldone) {
1285
1286 /* Locate beginning and end of field, keeping in mind that
1287 * some fields might be multiline
1288 */
1289 end = beg = pos;
1290
1291 while ((end < totalend) &&
1292 (end == beg) &&
1293 (done == 0) )
1294 {
1295
1296 if ( (*pos=='\n') && ((*(pos+1))!=0x20) && ((*(pos+1))!=0x09) )
1297 {
1298 end = pos;
1299 }
1300
1301 /* done with headers? */
1302 if ((*pos=='\n') &&
1303 ( (*(pos+1)=='\n') ||
1304 (*(pos+1)=='\r')) )
1305 {
1306 alldone = 1;
1307 }
1308
1309 if (pos >= (totalend - 1) )
1310 {
1311 end = pos;
1312 done = 1;
1313 }
1314
1315 ++pos;
1316
1317 }
1318
1319 /* At this point we have a field. Are we interested in it? */
1320 converted = convert_field(msg, beg, end);
1321
1322 /* Strip the field out of the RFC822 header if we used it */
1323 if (!converted) {
1324 StrBufAppendBufPlain(OtherHeaders, beg, end - beg, 0);
1325 StrBufAppendBufPlain(OtherHeaders, HKEY("\n"), 0);
1326 }
1327
1328 /* If we've hit the end of the message, bail out */
1329 if (pos >= totalend)
1330 alldone = 1;
1331 }
1332 StrBufAppendBufPlain(OtherHeaders, HKEY("\n"), 0);
1333 if (pos < totalend)
1334 StrBufAppendBufPlain(OtherHeaders, pos, totalend - pos, 0);
1335 FreeStrBuf(rfc822);
1336 CM_SetAsFieldSB(msg, eMesageText, &OtherHeaders);
1337
1338 /* Follow-up sanity checks... */
1339
1340 /* If there's no timestamp on this message, set it to now. */
1341 if (CM_IsEmpty(msg, eTimestamp)) {
1342 CM_SetFieldLONG(msg, eTimestamp, time(NULL));
1343 }
1344
1345 /* If a W (references, or rather, Wefewences) field is present, we
1346 * have to convert it from RFC822 format to Citadel format.
1347 */
1348 if (!CM_IsEmpty(msg, eWeferences)) {
1349 /// todo: API!
1351 }
1352
1353 return msg;
1354}
1355
1356
1357/*
1358 * Look for a particular header field in an RFC822 message text. If the
1359 * requested field is found, it is unfolded (if necessary) and returned to
1360 * the caller. The field name is stripped out, leaving only its contents.
1361 * The caller is responsible for freeing the returned buffer. If the requested
1362 * field is not present, or anything else goes wrong, it returns NULL.
1363 */
1364char *rfc822_fetch_field(const char *rfc822, const char *fieldname) {
1365 char *fieldbuf = NULL;
1366 const char *end_of_headers;
1367 const char *field_start;
1368 const char *ptr;
1369 char *cont;
1370 char fieldhdr[SIZ];
1371
1372 /* Should never happen, but sometimes we get stupid */
1373 if (rfc822 == NULL) return(NULL);
1374 if (fieldname == NULL) return(NULL);
1375
1376 snprintf(fieldhdr, sizeof fieldhdr, "%s:", fieldname);
1377
1378 /* Locate the end of the headers, so we don't run past that point */
1379 end_of_headers = cbmstrcasestr(rfc822, "\n\r\n");
1380 if (end_of_headers == NULL) {
1381 end_of_headers = cbmstrcasestr(rfc822, "\n\n");
1382 }
1383 if (end_of_headers == NULL) return (NULL);
1384
1385 field_start = cbmstrcasestr(rfc822, fieldhdr);
1386 if (field_start == NULL) return(NULL);
1387 if (field_start > end_of_headers) return(NULL);
1388
1389 fieldbuf = malloc(SIZ);
1390 strcpy(fieldbuf, "");
1391
1392 ptr = field_start;
1393 ptr = cmemreadline(ptr, fieldbuf, SIZ-strlen(fieldbuf) );
1394 while ( (isspace(ptr[0])) && (ptr < end_of_headers) ) {
1395 strcat(fieldbuf, " ");
1396 cont = &fieldbuf[strlen(fieldbuf)];
1397 ptr = cmemreadline(ptr, cont, SIZ-strlen(fieldbuf) );
1398 striplt(cont);
1399 }
1400
1401 strcpy(fieldbuf, &fieldbuf[strlen(fieldhdr)]);
1402 striplt(fieldbuf);
1403
1404 return(fieldbuf);
1405}
1406
1407
1408/*****************************************************************************
1409 * DIRECTORY MANAGEMENT FUNCTIONS *
1410 *****************************************************************************/
1411
1412/*
1413 * Generate the index key for an Internet e-mail address to be looked up
1414 * in the database.
1415 */
1416void directory_key(char *key, char *addr) {
1417 int i;
1418 int keylen = 0;
1419
1420 for (i=0; !IsEmptyStr(&addr[i]); ++i) {
1421 if (!isspace(addr[i])) {
1422 key[keylen++] = tolower(addr[i]);
1423 }
1424 }
1425 key[keylen++] = 0;
1426
1427 syslog(LOG_DEBUG, "internet_addressing: directory key is <%s>", key);
1428}
1429
1430
1431/*
1432 * Return nonzero if the supplied address is in one of "our" domains
1433 */
1434int IsDirectory(char *addr, int allow_masq_domains) {
1435 char domain[256];
1436 int h;
1437
1438 extract_token(domain, addr, 1, '@', sizeof domain);
1439 striplt(domain);
1440
1441 h = CtdlHostAlias(domain);
1442
1443 if ( (h == hostalias_masq) && allow_masq_domains)
1444 return(1);
1445
1446 if (h == hostalias_localhost) {
1447 return(1);
1448 }
1449 else {
1450 return(0);
1451 }
1452}
1453
1454
1455/*
1456 * Add an Internet e-mail address to the directory for a user
1457 */
1458int CtdlDirectoryAddUser(char *internet_addr, char *citadel_addr) {
1459 char key[SIZ];
1460
1461 if (IsDirectory(internet_addr, 0) == 0) {
1462 return 0;
1463 }
1464 syslog(LOG_DEBUG, "internet_addressing: create directory entry: %s --> %s", internet_addr, citadel_addr);
1465 directory_key(key, internet_addr);
1466 cdb_store(CDB_DIRECTORY, key, strlen(key), citadel_addr, strlen(citadel_addr)+1 );
1467 return 1;
1468}
1469
1470
1471/*
1472 * Delete an Internet e-mail address from the directory.
1473 *
1474 * (NOTE: we don't actually use or need the citadel_addr variable; it's merely
1475 * here because the callback API expects to be able to send it.)
1476 */
1477int CtdlDirectoryDelUser(char *internet_addr, char *citadel_addr) {
1478 char key[SIZ];
1479
1480 syslog(LOG_DEBUG, "internet_addressing: delete directory entry: %s --> %s", internet_addr, citadel_addr);
1481 directory_key(key, internet_addr);
1482 return cdb_delete(CDB_DIRECTORY, key, strlen(key) ) == 0;
1483}
1484
1485
1486/*
1487 * Look up an Internet e-mail address in the directory.
1488 * On success: returns 0, and Citadel address stored in 'target'
1489 * On failure: returns nonzero
1490 */
1491int CtdlDirectoryLookup(char *target, char *internet_addr, size_t targbuflen) {
1492 struct cdbdata *cdbrec;
1493 char key[SIZ];
1494
1495 /* Dump it in there unchanged, just for kicks */
1496 if (target != NULL) {
1497 safestrncpy(target, internet_addr, targbuflen);
1498 }
1499
1500 /* Only do lookups for addresses with hostnames in them */
1501 if (num_tokens(internet_addr, '@') != 2) return(-1);
1502
1503 /* Only do lookups for domains in the directory */
1504 if (IsDirectory(internet_addr, 0) == 0) return(-1);
1505
1506 directory_key(key, internet_addr);
1507 cdbrec = cdb_fetch(CDB_DIRECTORY, key, strlen(key) );
1508 if (cdbrec != NULL) {
1509 if (target != NULL) {
1510 safestrncpy(target, cdbrec->ptr, targbuflen);
1511 }
1512 cdb_free(cdbrec);
1513 return(0);
1514 }
1515
1516 return(-1);
1517}
1518
1519
1520/*
1521 * Harvest any email addresses that someone might want to have in their
1522 * "collected addresses" book.
1523 */
1525 char *coll = NULL;
1526 char addr[256];
1527 char user[256], node[256], name[256];
1528 int is_harvestable;
1529 int i, j, h;
1530 eMsgField field = 0;
1531
1532 if (msg == NULL) return(NULL);
1533
1534 is_harvestable = 1;
1535 strcpy(addr, "");
1536 if (!CM_IsEmpty(msg, eAuthor)) {
1537 strcat(addr, msg->cm_fields[eAuthor]);
1538 }
1539 if (!CM_IsEmpty(msg, erFc822Addr)) {
1540 strcat(addr, " <");
1541 strcat(addr, msg->cm_fields[erFc822Addr]);
1542 strcat(addr, ">");
1543 if (IsDirectory(msg->cm_fields[erFc822Addr], 0)) {
1544 is_harvestable = 0;
1545 }
1546 }
1547
1548 if (is_harvestable) {
1549 coll = strdup(addr);
1550 }
1551 else {
1552 coll = strdup("");
1553 }
1554
1555 if (coll == NULL) return(NULL);
1556
1557 /* Scan both the R (To) and Y (CC) fields */
1558 for (i = 0; i < 2; ++i) {
1559 if (i == 0) field = eRecipient;
1560 if (i == 1) field = eCarbonCopY;
1561
1562 if (!CM_IsEmpty(msg, field)) {
1563 for (j=0; j<num_tokens(msg->cm_fields[field], ','); ++j) {
1564 extract_token(addr, msg->cm_fields[field], j, ',', sizeof addr);
1565 if (strstr(addr, "=?") != NULL)
1567 process_rfc822_addr(addr, user, node, name);
1568 h = CtdlHostAlias(node);
1569 if (h != hostalias_localhost) {
1570 coll = realloc(coll, strlen(coll) + strlen(addr) + 4);
1571 if (coll == NULL) return(NULL);
1572 if (!IsEmptyStr(coll)) {
1573 strcat(coll, ",");
1574 }
1575 striplt(addr);
1576 strcat(coll, addr);
1577 }
1578 }
1579 }
1580 }
1581
1582 if (IsEmptyStr(coll)) {
1583 free(coll);
1584 return(NULL);
1585 }
1586 return(coll);
1587}
1588
1589
1590/*
1591 * Helper function for CtdlRebuildDirectoryIndex()
1592 */
1593void CtdlRebuildDirectoryIndex_backend(char *username, void *data) {
1594
1595 int j = 0;
1596 struct ctdluser usbuf;
1597
1598 if (CtdlGetUser(&usbuf, username) != 0) {
1599 return;
1600 }
1601
1602 if ( (!IsEmptyStr(usbuf.fullname)) && (!IsEmptyStr(usbuf.emailaddrs)) ) {
1603 for (j=0; j<num_tokens(usbuf.emailaddrs, '|'); ++j) {
1604 char one_email[512];
1605 extract_token(one_email, usbuf.emailaddrs, j, '|', sizeof one_email);
1607 }
1608 }
1609}
1610
1611
1612/*
1613 * Initialize the directory database (erasing anything already there)
1614 */
1616 syslog(LOG_INFO, "internet_addressing: rebuilding email address directory index");
1619}
1620
1621
1622/*
1623 * Configure Internet email addresses for a user account, updating the Directory Index in the process
1624 */
1625void CtdlSetEmailAddressesForUser(char *requested_user, char *new_emailaddrs)
1626{
1627 struct ctdluser usbuf;
1628 int i;
1629 char buf[SIZ];
1630
1631 if (CtdlGetUserLock(&usbuf, requested_user) != 0) { // We are relying on the fact that the DirectoryIndex functions don't lock.
1632 return; // Silently fail here if we can't acquire a lock on the user record.
1633 }
1634
1635 syslog(LOG_DEBUG, "internet_addressing: setting email addresses for <%s> to <%s>", usbuf.fullname, new_emailaddrs);
1636
1637 /* Delete all of the existing directory index records for the user (easier this way) */
1638 for (i=0; i<num_tokens(usbuf.emailaddrs, '|'); ++i) {
1639 extract_token(buf, usbuf.emailaddrs, i, '|', sizeof buf);
1640 CtdlDirectoryDelUser(buf, requested_user);
1641 }
1642
1643 strcpy(usbuf.emailaddrs, new_emailaddrs); // make it official.
1644
1645 /* Index all of the new email addresses (they've already been sanitized) */
1646 for (i=0; i<num_tokens(usbuf.emailaddrs, '|'); ++i) {
1647 extract_token(buf, usbuf.emailaddrs, i, '|', sizeof buf);
1648 CtdlDirectoryAddUser(buf, requested_user);
1649 }
1650
1652}
1653
1654
1655/*
1656 * Auto-generate an Internet email address for a user account
1657 */
1659{
1660 char synthetic_email_addr[1024];
1661 int i, j;
1662 int u = 0;
1663
1664 for (i=0; u==0; ++i) {
1665 if (i == 0) {
1666 // first try just converting the user name to lowercase and replacing spaces with underscores
1667 snprintf(synthetic_email_addr, sizeof synthetic_email_addr, "%s@%s", user->fullname, CtdlGetConfigStr("c_fqdn"));
1668 for (j=0; ((synthetic_email_addr[j] != '\0')&&(synthetic_email_addr[j] != '@')); j++) {
1669 synthetic_email_addr[j] = tolower(synthetic_email_addr[j]);
1670 if (!isalnum(synthetic_email_addr[j])) {
1671 synthetic_email_addr[j] = '_';
1672 }
1673 }
1674 }
1675 else if (i == 1) {
1676 // then try 'ctdl' followed by the user number
1677 snprintf(synthetic_email_addr, sizeof synthetic_email_addr, "ctdl%08lx@%s", user->usernum, CtdlGetConfigStr("c_fqdn"));
1678 }
1679 else if (i > 1) {
1680 // oof. just keep trying other numbers until we find one
1681 snprintf(synthetic_email_addr, sizeof synthetic_email_addr, "ctdl%08x@%s", i, CtdlGetConfigStr("c_fqdn"));
1682 }
1683 u = CtdlDirectoryLookup(NULL, synthetic_email_addr, 0);
1684 syslog(LOG_DEBUG, "user_ops: address <%s> lookup returned <%d>", synthetic_email_addr, u);
1685 }
1686
1687 CtdlSetEmailAddressesForUser(user->fullname, synthetic_email_addr);
1688 strncpy(CC->user.emailaddrs, synthetic_email_addr, sizeof(user->emailaddrs));
1689 syslog(LOG_DEBUG, "user_ops: auto-generated email address <%s> for <%s>", synthetic_email_addr, user->fullname);
1690}
#define ROOMNAMELEN
Definition: citadel.h:56
char * CtdlGetConfigStr(char *key)
Definition: config.c:393
char * CtdlGetSysConfig(char *sysconfname)
Definition: config.c:452
#define CC
Definition: context.h:140
int CtdlGetRoom(struct ctdlroom *qrbuf, const char *room_name)
Definition: room_ops.c:342
int CtdlGetUserLock(struct ctdluser *usbuf, char *name)
Definition: user_ops.c:113
void CtdlPutUserLock(struct ctdluser *usbuf)
Definition: user_ops.c:147
int CtdlGetUser(struct ctdluser *usbuf, char *name)
Definition: user_ops.c:77
void cdb_free(struct cdbdata *cdb)
Definition: database.c:609
int cdb_store(int cdb, const void *ckey, int ckeylen, void *cdata, int cdatalen)
Definition: database.c:397
struct cdbdata * cdb_fetch(int cdb, const void *key, int keylen)
Definition: database.c:546
int cdb_delete(int cdb, void *key, int keylen)
Definition: database.c:482
void cdb_trunc(int cdb)
Definition: database.c:726
struct CtdlMessage * convert_internet_message_buf(StrBuf **rfc822)
int CtdlDirectoryDelUser(char *internet_addr, char *citadel_addr)
int CtdlIsMe(char *addr, int addr_buf_len)
struct recptypes * validate_recipients(char *supplied_recipients, const char *RemoteIdentifier, int Flags)
char * inetcfg
void free_recipients(struct recptypes *valid)
int IsDirectory(char *addr, int allow_masq_domains)
void sanitize_truncated_recipient(char *str)
void CtdlRebuildDirectoryIndex(void)
void directory_key(char *key, char *addr)
struct CtdlMessage * convert_internet_message(char *rfc822)
int expand_aliases(char *name, char *aliases)
Array * split_recps(char *addresses, Array *append_to)
int CtdlHostAlias(char *fqdn)
@ EA_LOCAL
@ EA_ERROR
@ EA_INTERNET
@ EA_MULTIPLE
void CtdlSetEmailAddressesForUser(char *requested_user, char *new_emailaddrs)
void CtdlRebuildDirectoryIndex_backend(char *username, void *data)
void process_rfc822_addr(const char *rfc822, char *user, char *node, char *name)
char * harvest_collected_addresses(struct CtdlMessage *msg)
int CtdlDirectoryLookup(char *target, char *internet_addr, size_t targbuflen)
char * rfc822_fetch_field(const char *rfc822, const char *fieldname)
void unfold_rfc822_field(char **field, char **FieldEnd)
int convert_field(struct CtdlMessage *msg, const char *beg, const char *end)
char * qp_encode_email_addrs(char *source)
void convert_references_to_wefewences(char *str)
void AutoGenerateEmailAddressForUser(struct ctdluser *user)
void utf8ify_rfc822_string(char *a)
int CtdlDirectoryAddUser(char *internet_addr, char *citadel_addr)
void remove_any_whitespace_to_the_left_or_right_of_at_symbol(char *name)
@ hostalias_masq
@ hostalias_nomatch
@ hostalias_localhost
int CM_IsEmpty(struct CtdlMessage *Msg, eMsgField which)
Definition: msgbase.c:137
void CM_SetField(struct CtdlMessage *Msg, eMsgField which, const char *buf, long length)
Definition: msgbase.c:142
void CM_SetFieldLONG(struct CtdlMessage *Msg, eMsgField which, long lvalue)
Definition: msgbase.c:156
void CM_SetAsFieldSB(struct CtdlMessage *Msg, eMsgField which, StrBuf **buf)
Definition: msgbase.c:258
void * malloc(size_t)
time_t parsedate(const char *p)
Definition: parsedate.c:2295
void free(void *)
int CtdlDoIHavePermissionToPostInThisRoom(char *errmsgbuf, size_t n, const char *RemoteIdentifier, PostType PostPublic, int is_reply)
Definition: room_ops.c:47
struct ctdluser usbuf
Definition: serv_migrate.c:496
enum _MsgField eMsgField
#define CTDLMESSAGE_MAGIC
Definition: server.h:42
@ eMessagePath
Definition: server.h:317
@ eWeferences
Definition: server.h:322
@ eenVelopeTo
Definition: server.h:321
@ emessageId
Definition: server.h:311
@ eMesageText
Definition: server.h:315
@ erFc822Addr
Definition: server.h:310
@ eAuthor
Definition: server.h:307
@ eReplyTo
Definition: server.h:313
@ eCarbonCopY
Definition: server.h:323
@ eTimestamp
Definition: server.h:319
@ eMsgSubject
Definition: server.h:320
@ eRecipient
Definition: server.h:318
@ eListID
Definition: server.h:314
#define FMT_RFC822
Definition: server.h:178
@ CDB_DIRECTORY
Definition: server.h:191
#define RECPTYPES_MAGIC
Definition: server.h:65
int snprintf(char *buf, size_t max, const char *fmt,...)
Definition: snprintf.c:69
int cm_magic
Definition: server.h:34
char cm_anon_type
Definition: server.h:35
char * cm_fields[256]
Definition: server.h:37
char cm_format_type
Definition: server.h:36
char * ptr
Definition: server.h:204
char fullname[64]
Definition: citadel.h:90
long usernum
Definition: citadel.h:87
char emailaddrs[512]
Definition: citadel.h:93
char * recp_room
Definition: server.h:57
char * display_recp
Definition: server.h:59
int recptypes_magic
Definition: server.h:48
int num_internet
Definition: server.h:50
char * bounce_to
Definition: server.h:60
int num_room
Definition: server.h:52
char * recp_local
Definition: server.h:55
char * recp_orgroom
Definition: server.h:58
int num_error
Definition: server.h:53
char * sending_room
Definition: server.h:62
char * envelope_from
Definition: server.h:61
char * recp_internet
Definition: server.h:56
char * errormsg
Definition: server.h:54
int num_local
Definition: server.h:49
#define SIZ
Definition: sysconfig.h:33
void ForEachUser(void(*CallBack)(char *, void *out_data), void *in_data)
Definition: user_ops.c:1206