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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) 1987-2022 by the citadel.org team
5//
6// This program is open source software. Use, duplication, or disclosure
7// is subject to the terms of the GNU General Public License, version 3.
8// The program is distributed without any warranty, expressed or implied.
9
10#include "sysdep.h"
11#include <stdlib.h>
12#include <unistd.h>
13#include <stdio.h>
14#include <fcntl.h>
15#include <ctype.h>
16#include <signal.h>
17#include <pwd.h>
18#include <errno.h>
19#include <sys/types.h>
20#include <time.h>
21#include <sys/wait.h>
22#include <string.h>
23#include <limits.h>
24#include <libcitadel.h>
25#include "citadel.h"
26#include "server.h"
27#include "sysdep_decls.h"
28#include "citserver.h"
29#include "support.h"
30#include "config.h"
31#include "msgbase.h"
32#include "internet_addressing.h"
33#include "user_ops.h"
34#include "room_ops.h"
35#include "parsedate.h"
36#include "database.h"
37#include "ctdl_module.h"
38#ifdef HAVE_ICONV
39#include <iconv.h>
40
41// This is the non-define version in case it is needed for debugging
42#if 0
43inline void FindNextEnd (char *bptr, char *end)
44{
45 /* Find the next ?Q? */
46 end = strchr(bptr + 2, '?');
47 if (end == NULL) return NULL;
48 if (((*(end + 1) == 'B') || (*(end + 1) == 'Q')) &&
49 (*(end + 2) == '?')) {
50 /* skip on to the end of the cluster, the next ?= */
51 end = strstr(end + 3, "?=");
52 }
53 else
54 /* sort of half valid encoding, try to find an end. */
55 end = strstr(bptr, "?=");
56}
57#endif
58
59#define FindNextEnd(bptr, end) { \
60 end = strchr(bptr + 2, '?'); \
61 if (end != NULL) { \
62 if (((*(end + 1) == 'B') || (*(end + 1) == 'Q')) && (*(end + 2) == '?')) { \
63 end = strstr(end + 3, "?="); \
64 } else end = strstr(bptr, "?="); \
65 } \
66}
67
68// Handle subjects with RFC2047 encoding such as:
69// =?koi8-r?B?78bP0s3Mxc7JxSDXz9rE1dvO2c3JINvB0sHNySDP?=
70void utf8ify_rfc822_string(char *buf) {
71 char *start, *end, *next, *nextend, *ptr;
72 char newbuf[1024];
73 char charset[128];
74 char encoding[16];
75 char istr[1024];
76 iconv_t ic = (iconv_t)(-1) ;
77 char *ibuf; // Buffer of characters to be converted
78 char *obuf; // Buffer for converted characters
79 size_t ibuflen; // Length of input buffer
80 size_t obuflen; // Length of output buffer
81 char *isav; // Saved pointer to input buffer
82 char *osav; // Saved pointer to output buffer
83 int passes = 0;
84 int i, len, delta;
85 int illegal_non_rfc2047_encoding = 0;
86
87 // Sometimes, badly formed messages contain strings which were simply
88 // written out directly in some foreign character set instead of
89 // using RFC2047 encoding. This is illegal but we will attempt to
90 // handle it anyway by converting from a user-specified default
91 // charset to UTF-8 if we see any nonprintable characters.
92 len = strlen(buf);
93 for (i=0; i<len; ++i) {
94 if ((buf[i] < 32) || (buf[i] > 126)) {
95 illegal_non_rfc2047_encoding = 1;
96 i = len; // take a shortcut, it won't be more than one.
97 }
98 }
99 if (illegal_non_rfc2047_encoding) {
100 const char *default_header_charset = "iso-8859-1";
101 if ( (strcasecmp(default_header_charset, "UTF-8")) && (strcasecmp(default_header_charset, "us-ascii")) ) {
102 ctdl_iconv_open("UTF-8", default_header_charset, &ic);
103 if (ic != (iconv_t)(-1) ) {
104 ibuf = malloc(1024);
105 isav = ibuf;
106 safestrncpy(ibuf, buf, 1024);
107 ibuflen = strlen(ibuf);
108 obuflen = 1024;
109 obuf = (char *) malloc(obuflen);
110 osav = obuf;
111 iconv(ic, &ibuf, &ibuflen, &obuf, &obuflen);
112 osav[1024-obuflen] = 0;
113 strcpy(buf, osav);
114 free(osav);
115 iconv_close(ic);
116 free(isav);
117 }
118 }
119 }
120
121 // pre evaluate the first pair
122 nextend = end = NULL;
123 len = strlen(buf);
124 start = strstr(buf, "=?");
125 if (start != NULL)
126 FindNextEnd (start, end);
127
128 while ((start != NULL) && (end != NULL)) {
129 next = strstr(end, "=?");
130 if (next != NULL)
131 FindNextEnd(next, nextend);
132 if (nextend == NULL)
133 next = NULL;
134
135 // did we find two partitions
136 if ((next != NULL) && ((next - end) > 2)) {
137 ptr = end + 2;
138 while ((ptr < next) &&
139 (isspace(*ptr) ||
140 (*ptr == '\r') ||
141 (*ptr == '\n') ||
142 (*ptr == '\t')))
143 ptr ++;
144 // did we find a gab just filled with blanks?
145 if (ptr == next) {
146 memmove(end + 2, next, len - (next - start));
147
148 // now terminate the gab at the end
149 delta = (next - end) - 2;
150 len -= delta;
151 buf[len] = '\0';
152
153 // move next to its new location.
154 next -= delta;
155 nextend -= delta;
156 }
157 }
158 // our next-pair is our new first pair now.
159 start = next;
160 end = nextend;
161 }
162
163 // Now we handle foreign character sets properly encoded in RFC2047 format.
164 start = strstr(buf, "=?");
165 FindNextEnd((start != NULL)? start : buf, end);
166 while (start != NULL && end != NULL && end > start) {
167 extract_token(charset, start, 1, '?', sizeof charset);
168 extract_token(encoding, start, 2, '?', sizeof encoding);
169 extract_token(istr, start, 3, '?', sizeof istr);
170
171 ibuf = malloc(1024);
172 isav = ibuf;
173 if (!strcasecmp(encoding, "B")) { // base64
174 ibuflen = CtdlDecodeBase64(ibuf, istr, strlen(istr));
175 }
176 else if (!strcasecmp(encoding, "Q")) { // quoted-printable
177 size_t len;
178 unsigned long pos;
179
180 len = strlen(istr);
181 pos = 0;
182 while (pos < len) {
183 if (istr[pos] == '_') istr[pos] = ' ';
184 pos++;
185 }
186 ibuflen = CtdlDecodeQuotedPrintable(ibuf, istr, len);
187 }
188 else {
189 strcpy(ibuf, istr); // unknown encoding
190 ibuflen = strlen(istr);
191 }
192
193 ctdl_iconv_open("UTF-8", charset, &ic);
194 if (ic != (iconv_t)(-1) ) {
195 obuflen = 1024;
196 obuf = (char *) malloc(obuflen);
197 osav = obuf;
198 iconv(ic, &ibuf, &ibuflen, &obuf, &obuflen);
199 osav[1024-obuflen] = 0;
200
201 end = start;
202 end++;
203 strcpy(start, "");
204 remove_token(end, 0, '?');
205 remove_token(end, 0, '?');
206 remove_token(end, 0, '?');
207 remove_token(end, 0, '?');
208 strcpy(end, &end[1]);
209
210 snprintf(newbuf, sizeof newbuf, "%s%s%s", buf, osav, end);
211 strcpy(buf, newbuf);
212 free(osav);
213 iconv_close(ic);
214 }
215 else {
216 end = start;
217 end++;
218 strcpy(start, "");
219 remove_token(end, 0, '?');
220 remove_token(end, 0, '?');
221 remove_token(end, 0, '?');
222 remove_token(end, 0, '?');
223 strcpy(end, &end[1]);
224
225 snprintf(newbuf, sizeof newbuf, "%s(unreadable)%s", buf, end);
226 strcpy(buf, newbuf);
227 }
228
229 free(isav);
230
231 // Since spammers will go to all sorts of absurd lengths to get their
232 // messages through, there are LOTS of corrupt headers out there.
233 // So, prevent a really badly formed RFC2047 header from throwing
234 // this function into an infinite loop.
235 ++passes;
236 if (passes > 20) return;
237
238 start = strstr(buf, "=?");
239 FindNextEnd((start != NULL)? start : buf, end);
240 }
241
242}
243#else
244inline void utf8ify_rfc822_string(char *a){};
245
246#endif
247
248
249char *inetcfg = NULL;
250
251// Return nonzero if the supplied name is an alias for this host.
252int CtdlHostAlias(char *fqdn) {
253 int config_lines;
254 int i;
255 char buf[256];
256 char host[256], type[256];
257 int found = 0;
258
259 if (fqdn == NULL) return(hostalias_nomatch);
260 if (IsEmptyStr(fqdn)) return(hostalias_nomatch);
261 if (!strcasecmp(fqdn, "localhost")) return(hostalias_localhost);
262 if (!strcasecmp(fqdn, CtdlGetConfigStr("c_fqdn"))) return(hostalias_localhost);
263 if (!strcasecmp(fqdn, CtdlGetConfigStr("c_nodename"))) return(hostalias_localhost);
264 if (inetcfg == NULL) return(hostalias_nomatch);
265
266 config_lines = num_tokens(inetcfg, '\n');
267 for (i=0; i<config_lines; ++i) {
268 extract_token(buf, inetcfg, i, '\n', sizeof buf);
269 extract_token(host, buf, 0, '|', sizeof host);
270 extract_token(type, buf, 1, '|', sizeof type);
271
272 found = 0;
273
274 // Process these in a specific order, in case there are multiple matches.
275 // We want localhost to override masq, for example.
276
277 if ( (!strcasecmp(type, "masqdomain")) && (!strcasecmp(fqdn, host))) {
278 found = hostalias_masq;
279 }
280
281 if ( (!strcasecmp(type, "localhost")) && (!strcasecmp(fqdn, host))) {
282 found = hostalias_localhost;
283 }
284
285 // "directory" used to be a distributed version of "localhost" but they're both the same now
286 if ( (!strcasecmp(type, "directory")) && (!strcasecmp(fqdn, host))) {
287 found = hostalias_localhost;
288 }
289
290 if (found) return(found);
291 }
292 return(hostalias_nomatch);
293}
294
295
296// Determine whether a given Internet address belongs to the current user
297int CtdlIsMe(char *addr, int addr_buf_len) {
298 struct recptypes *recp;
299 int i;
300
301 recp = validate_recipients(addr, NULL, 0);
302 if (recp == NULL) return(0);
303
304 if (recp->num_local == 0) {
305 free_recipients(recp);
306 return(0);
307 }
308
309 for (i=0; i<recp->num_local; ++i) {
310 extract_token(addr, recp->recp_local, i, '|', addr_buf_len);
311 if (!strcasecmp(addr, CC->user.fullname)) {
312 free_recipients(recp);
313 return(1);
314 }
315 }
316
317 free_recipients(recp);
318 return(0);
319}
320
321
322// If the last item in a list of recipients was truncated to a partial address,
323// remove it completely in order to avoid choking library functions.
325 if (!str) return;
326 if (num_tokens(str, ',') < 2) return;
327
328 int len = strlen(str);
329 if (len < 900) return;
330 if (len > 998) str[998] = 0;
331
332 char *cptr = strrchr(str, ',');
333 if (!cptr) return;
334
335 char *lptr = strchr(cptr, '<');
336 char *rptr = strchr(cptr, '>');
337
338 if ( (lptr) && (rptr) && (rptr > lptr) ) return;
339
340 *cptr = 0;
341}
342
343
344// This function is self explanatory.
345// (What can I say, I'm in a weird mood today...)
347 char *ptr;
348 if (!name) return;
349
350 for (ptr=name; *ptr; ++ptr) {
351 while ( (isspace(*ptr)) && (*(ptr+1)=='@') ) {
352 strcpy(ptr, ptr+1);
353 if (ptr > name) --ptr;
354 }
355 while ( (*ptr=='@') && (*(ptr+1)!=0) && (isspace(*(ptr+1))) ) {
356 strcpy(ptr+1, ptr+2);
357 }
358 }
359}
360
361
362// values that can be returned by expand_aliases()
363enum {
364 EA_ERROR, // Can't send message due to bad address
365 EA_MULTIPLE, // Alias expanded into multiple recipients -- run me again!
366 EA_LOCAL, // Local message, do no network processing
367 EA_INTERNET, // Convert msg and send as Internet mail
368 EA_SKIP // This recipient has been invalidated -- skip it!
370
371
372// Process alias and routing info for email addresses
373int expand_aliases(char *name, char *aliases) {
374 int a;
375 char aaa[SIZ];
376 int at = 0;
377
378 if (aliases) {
379 int num_aliases = num_tokens(aliases, '\n');
380 for (a=0; a<num_aliases; ++a) {
381 extract_token(aaa, aliases, a, '\n', sizeof aaa);
382 char *bar = strchr(aaa, '|');
383 if (bar) {
384 bar[0] = 0;
385 ++bar;
386 striplt(aaa);
387 striplt(bar);
388 if ( (!IsEmptyStr(aaa)) && (!strcasecmp(name, aaa)) ) {
389 syslog(LOG_DEBUG, "internet_addressing: global alias <%s> to <%s>", name, bar);
390 strcpy(name, bar);
391 }
392 }
393 }
394 if (strchr(name, ',')) {
395 return(EA_MULTIPLE);
396 }
397 }
398
399 char original_name[256]; // Now go for the regular aliases
400 safestrncpy(original_name, name, sizeof original_name);
401
402 // should these checks still be here, or maybe move them to split_recps() ?
403 striplt(name);
405 stripallbut(name, '<', '>');
406
407 // Hit the email address directory
408 if (CtdlDirectoryLookup(aaa, name, sizeof aaa) == 0) {
409 strcpy(name, aaa);
410 }
411
412 if (strcasecmp(original_name, name)) {
413 syslog(LOG_INFO, "internet_addressing: directory alias <%s> to <%s>", original_name, name);
414 }
415
416 // Change "user @ xxx" to "user" if xxx is an alias for this host
417 for (a=0; name[a] != '\0'; ++a) {
418 if (name[a] == '@') {
419 if (CtdlHostAlias(&name[a+1]) == hostalias_localhost) {
420 name[a] = 0;
421 syslog(LOG_DEBUG, "internet_addressing: host is local, recipient is <%s>", name);
422 break;
423 }
424 }
425 }
426
427 // Is this a local or remote recipient?
428 at = haschar(name, '@');
429 if (at == 0) {
430 return(EA_LOCAL); // no @'s = local address
431 }
432 else if (at == 1) {
433 return(EA_INTERNET); // one @ = internet address
434 }
435 else {
436 return(EA_ERROR); // more than one @ = badly formed address
437 }
438}
439
440
441// Return a supplied list of email addresses as an array, removing superfluous information and syntax.
442// If an existing Array is supplied as "append_to" it will do so; otherwise a new Array is allocated.
443Array *split_recps(char *addresses, Array *append_to) {
444
445 if (IsEmptyStr(addresses)) { // nothing supplied, nothing returned
446 return(NULL);
447 }
448
449 // Copy the supplied address list into our own memory space, because we are going to modify it.
450 char *a = strdup(addresses);
451 if (a == NULL) {
452 syslog(LOG_ERR, "internet_addressing: malloc() failed: %m");
453 return(NULL);
454 }
455
456 // Strip out anything in double quotes
457 char *l = NULL;
458 char *r = NULL;
459 do {
460 l = strchr(a, '\"');
461 r = strrchr(a, '\"');
462 if (r > l) {
463 strcpy(l, r+1);
464 }
465 } while (r > l);
466
467 // Transform all qualifying delimiters to commas
468 char *t;
469 for (t=a; t[0]; ++t) {
470 if ((t[0]==';') || (t[0]=='|')) {
471 t[0]=',';
472 }
473 }
474
475 // Tokenize the recipients into an array. No single recipient should be larger than 256 bytes.
476 Array *recipients_array = NULL;
477 if (append_to) {
478 recipients_array = append_to; // Append to an existing array of recipients
479 }
480 else {
481 recipients_array = array_new(256); // This is a new array of recipients
482 }
483
484 int num_addresses = num_tokens(a, ',');
485 int i;
486 for (i=0; i<num_addresses; ++i) {
487 char this_address[256];
488 extract_token(this_address, a, i, ',', sizeof this_address);
489 striplt(this_address); // strip leading and trailing whitespace
490 stripout(this_address, '(', ')'); // remove any portion in parentheses
491 stripallbut(this_address, '<', '>'); // if angle brackets are present, keep only what is inside them
492 if (!IsEmptyStr(this_address)) {
493 array_append(recipients_array, this_address);
494 }
495 }
496
497 free(a); // We don't need this buffer anymore.
498 return(recipients_array); // Return the completed array to the caller.
499}
500
501
502// Validate recipients, count delivery types and errors, and handle aliasing
503//
504// Returns 0 if all addresses are ok, ret->num_error = -1 if no addresses
505// were specified, or the number of addresses found invalid.
506//
507// Caller needs to free the result using free_recipients()
508//
509struct recptypes *validate_recipients(char *supplied_recipients, const char *RemoteIdentifier, int Flags) {
510 struct recptypes *ret;
511 char *recipients = NULL;
512 char append[SIZ];
513 long len;
514 int mailtype;
515 int invalid;
516 struct ctdluser tempUS;
517 struct ctdlroom original_room;
518 int err = 0;
519 char errmsg[SIZ];
520 char *org_recp;
521 char this_recp[256];
522
523 ret = (struct recptypes *) malloc(sizeof(struct recptypes)); // Initialize
524 if (ret == NULL) return(NULL);
525 memset(ret, 0, sizeof(struct recptypes)); // set all values to null/zero
526
527 if (supplied_recipients == NULL) {
528 recipients = strdup("");
529 }
530 else {
531 recipients = strdup(supplied_recipients);
532 }
533
534 len = strlen(recipients) + 1024; // allocate memory
535 ret->errormsg = malloc(len);
536 ret->recp_local = malloc(len);
537 ret->recp_internet = malloc(len);
538 ret->recp_room = malloc(len);
539 ret->display_recp = malloc(len);
540 ret->recp_orgroom = malloc(len);
541
542 ret->errormsg[0] = 0;
543 ret->recp_local[0] = 0;
544 ret->recp_internet[0] = 0;
545 ret->recp_room[0] = 0;
546 ret->recp_orgroom[0] = 0;
547 ret->display_recp[0] = 0;
549
550 Array *recp_array = split_recps(supplied_recipients, NULL);
551
552 char *aliases = CtdlGetSysConfig(GLOBAL_ALIASES); // First hit the Global Alias Table
553
554 int r;
555 for (r=0; (recp_array && r<array_len(recp_array)); ++r) {
556 org_recp = (char *)array_get_element_at(recp_array, r);
557 strncpy(this_recp, org_recp, sizeof this_recp);
558
559 int i;
560 for (i=0; i<3; ++i) { // pass three times through the aliaser
561 mailtype = expand_aliases(this_recp, aliases);
562
563 // If an alias expanded to multiple recipients, strip off those recipients and append them
564 // to the end of the array. This loop will hit those again when it gets there.
565 if (mailtype == EA_MULTIPLE) {
566 recp_array = split_recps(this_recp, recp_array);
567 }
568 }
569
570 // This loop searches for duplicate recipients in the final list and marks them to be skipped.
571 int j;
572 for (j=0; j<r; ++j) {
573 if (!strcasecmp(this_recp, (char *)array_get_element_at(recp_array, j) )) {
574 mailtype = EA_SKIP;
575 }
576 }
577
578 syslog(LOG_DEBUG, "Recipient #%d of type %d is <%s>", r, mailtype, this_recp);
579 invalid = 0;
580 errmsg[0] = 0;
581 switch(mailtype) {
582 case EA_LOCAL: // There are several types of "local" recipients.
583
584 // Old BBS conventions require mail to "sysop" to go somewhere. Send it to the admin room.
585 if (!strcasecmp(this_recp, "sysop")) {
586 ++ret->num_room;
587 strcpy(this_recp, CtdlGetConfigStr("c_aideroom"));
588 if (!IsEmptyStr(ret->recp_room)) {
589 strcat(ret->recp_room, "|");
590 }
591 strcat(ret->recp_room, this_recp);
592 }
593
594 // This handles rooms which can receive posts via email.
595 else if (!strncasecmp(this_recp, "room_", 5)) {
596 original_room = CC->room; // Remember where we parked
597
598 char mail_to_room[ROOMNAMELEN];
599 char *m;
600 strncpy(mail_to_room, &this_recp[5], sizeof mail_to_room);
601 for (m = mail_to_room; *m; ++m) {
602 if (m[0] == '_') m[0]=' ';
603 }
604 if (!CtdlGetRoom(&CC->room, mail_to_room)) { // Find the room they asked for
605
606 err = CtdlDoIHavePermissionToPostInThisRoom( // check for write permissions to room
607 errmsg,
608 sizeof errmsg,
609 Flags,
610 0 // 0 means "this is not a reply"
611 );
612 if (err) {
613 ++ret->num_error;
614 invalid = 1;
615 }
616 else {
617 ++ret->num_room;
618 if (!IsEmptyStr(ret->recp_room)) {
619 strcat(ret->recp_room, "|");
620 }
621 strcat(ret->recp_room, CC->room.QRname);
622
623 if (!IsEmptyStr(ret->recp_orgroom)) {
624 strcat(ret->recp_orgroom, "|");
625 }
626 strcat(ret->recp_orgroom, this_recp);
627
628 }
629 }
630 else { // no such room exists
631 ++ret->num_error;
632 invalid = 1;
633 }
634
635 // Restore this session's original room location.
636 CC->room = original_room;
637
638 }
639
640 // This handles the most common case, which is mail to a user's inbox.
641 else if (CtdlGetUser(&tempUS, this_recp) == 0) {
642 ++ret->num_local;
643 strcpy(this_recp, tempUS.fullname);
644 if (!IsEmptyStr(ret->recp_local)) {
645 strcat(ret->recp_local, "|");
646 }
647 strcat(ret->recp_local, this_recp);
648 }
649
650 // No match for this recipient
651 else {
652 ++ret->num_error;
653 invalid = 1;
654 }
655 break;
656 case EA_INTERNET:
657 // Yes, you're reading this correctly: if the target domain points back to the local system,
658 // the address is invalid. That's because if the address were valid, we would have
659 // already translated it to a local address by now.
660 if (IsDirectory(this_recp, 0)) {
661 ++ret->num_error;
662 invalid = 1;
663 }
664 else {
665 ++ret->num_internet;
666 if (!IsEmptyStr(ret->recp_internet)) {
667 strcat(ret->recp_internet, "|");
668 }
669 strcat(ret->recp_internet, this_recp);
670 }
671 break;
672 case EA_MULTIPLE:
673 case EA_SKIP:
674 // no action required, anything in this slot has already been processed elsewhere
675 break;
676 case EA_ERROR:
677 ++ret->num_error;
678 invalid = 1;
679 break;
680 }
681 if (invalid) {
682 if (IsEmptyStr(errmsg)) {
683 snprintf(append, sizeof append, "Invalid recipient: %s", this_recp);
684 }
685 else {
686 snprintf(append, sizeof append, "%s", errmsg);
687 }
688 if ( (strlen(ret->errormsg) + strlen(append) + 3) < SIZ) {
689 if (!IsEmptyStr(ret->errormsg)) {
690 strcat(ret->errormsg, "; ");
691 }
692 strcat(ret->errormsg, append);
693 }
694 }
695 else {
696 if (IsEmptyStr(ret->display_recp)) {
697 strcpy(append, this_recp);
698 }
699 else {
700 snprintf(append, sizeof append, ", %s", this_recp);
701 }
702 if ( (strlen(ret->display_recp)+strlen(append)) < SIZ) {
703 strcat(ret->display_recp, append);
704 }
705 }
706 }
707
708 if (aliases != NULL) { // ok, we're done with the global alias list now
709 free(aliases);
710 }
711
712 if ( (ret->num_local + ret->num_internet + ret->num_room + ret->num_error) == 0) {
713 ret->num_error = (-1);
714 strcpy(ret->errormsg, "No recipients specified.");
715 }
716
717 syslog(LOG_DEBUG, "internet_addressing: validate_recipients() = %d local, %d room, %d SMTP, %d error",
718 ret->num_local, ret->num_room, ret->num_internet, ret->num_error
719 );
720
721 free(recipients);
722 if (recp_array) {
723 array_free(recp_array);
724 }
725
726 return(ret);
727}
728
729
730// Destructor for recptypes
731void free_recipients(struct recptypes *valid) {
732
733 if (valid == NULL) {
734 return;
735 }
736
737 if (valid->recptypes_magic != RECPTYPES_MAGIC) {
738 syslog(LOG_ERR, "internet_addressing: attempt to call free_recipients() on some other data type!");
739 abort();
740 }
741
742 if (valid->errormsg != NULL) free(valid->errormsg);
743 if (valid->recp_local != NULL) free(valid->recp_local);
744 if (valid->recp_internet != NULL) free(valid->recp_internet);
745 if (valid->recp_room != NULL) free(valid->recp_room);
746 if (valid->recp_orgroom != NULL) free(valid->recp_orgroom);
747 if (valid->display_recp != NULL) free(valid->display_recp);
748 if (valid->bounce_to != NULL) free(valid->bounce_to);
749 if (valid->envelope_from != NULL) free(valid->envelope_from);
750 if (valid->sending_room != NULL) free(valid->sending_room);
751 free(valid);
752}
753
754
755char *qp_encode_email_addrs(char *source) {
756 char *user, *node, *name;
757 const char headerStr[] = "=?UTF-8?Q?";
758 char *Encoded;
759 char *EncodedName;
760 char *nPtr;
761 int need_to_encode = 0;
762 long SourceLen;
763 long EncodedMaxLen;
764 long nColons = 0;
765 long *AddrPtr;
766 long *AddrUtf8;
767 long nAddrPtrMax = 50;
768 long nmax;
769 int InQuotes = 0;
770 int i, n;
771
772 if (source == NULL) return source;
773 if (IsEmptyStr(source)) return source;
774 syslog(LOG_DEBUG, "internet_addressing: qp_encode_email_addrs <%s>", source);
775
776 AddrPtr = malloc (sizeof (long) * nAddrPtrMax);
777 AddrUtf8 = malloc (sizeof (long) * nAddrPtrMax);
778 memset(AddrUtf8, 0, sizeof (long) * nAddrPtrMax);
779 *AddrPtr = 0;
780 i = 0;
781 while (!IsEmptyStr (&source[i])) {
782 if (nColons >= nAddrPtrMax){
783 long *ptr;
784
785 ptr = (long *) malloc(sizeof (long) * nAddrPtrMax * 2);
786 memcpy (ptr, AddrPtr, sizeof (long) * nAddrPtrMax);
787 free (AddrPtr), AddrPtr = ptr;
788
789 ptr = (long *) malloc(sizeof (long) * nAddrPtrMax * 2);
790 memset(&ptr[nAddrPtrMax], 0, sizeof (long) * nAddrPtrMax);
791
792 memcpy (ptr, AddrUtf8, sizeof (long) * nAddrPtrMax);
793 free (AddrUtf8), AddrUtf8 = ptr;
794 nAddrPtrMax *= 2;
795 }
796 if (((unsigned char) source[i] < 32) || ((unsigned char) source[i] > 126)) {
797 need_to_encode = 1;
798 AddrUtf8[nColons] = 1;
799 }
800 if (source[i] == '"') {
801 InQuotes = !InQuotes;
802 }
803 if (!InQuotes && source[i] == ',') {
804 AddrPtr[nColons] = i;
805 nColons++;
806 }
807 i++;
808 }
809 if (need_to_encode == 0) {
810 free(AddrPtr);
811 free(AddrUtf8);
812 return source;
813 }
814
815 SourceLen = i;
816 EncodedMaxLen = nColons * (sizeof(headerStr) + 3) + SourceLen * 3;
817 Encoded = (char*) malloc (EncodedMaxLen);
818
819 for (i = 0; i < nColons; i++) {
820 source[AddrPtr[i]++] = '\0';
821 }
822 // TODO: if libidn, this might get larger
823 user = malloc(SourceLen + 1);
824 node = malloc(SourceLen + 1);
825 name = malloc(SourceLen + 1);
826
827 nPtr = Encoded;
828 *nPtr = '\0';
829 for (i = 0; i < nColons && nPtr != NULL; i++) {
830 nmax = EncodedMaxLen - (nPtr - Encoded);
831 if (AddrUtf8[i]) {
832 process_rfc822_addr(&source[AddrPtr[i]], user, node, name);
833 // TODO: libIDN here !
834 if (IsEmptyStr(name)) {
835 n = snprintf(nPtr, nmax, (i==0)?"%s@%s" : ",%s@%s", user, node);
836 }
837 else {
838 EncodedName = rfc2047encode(name, strlen(name));
839 n = snprintf(nPtr, nmax, (i==0)?"%s <%s@%s>" : ",%s <%s@%s>", EncodedName, user, node);
840 free(EncodedName);
841 }
842 }
843 else {
844 n = snprintf(nPtr, nmax, (i==0)?"%s" : ",%s", &source[AddrPtr[i]]);
845 }
846 if (n > 0 )
847 nPtr += n;
848 else {
849 char *ptr, *nnPtr;
850 ptr = (char*) malloc(EncodedMaxLen * 2);
851 memcpy(ptr, Encoded, EncodedMaxLen);
852 nnPtr = ptr + (nPtr - Encoded), nPtr = nnPtr;
853 free(Encoded), Encoded = ptr;
854 EncodedMaxLen *= 2;
855 i--; // do it once more with properly lengthened buffer
856 }
857 }
858 for (i = 0; i < nColons; i++)
859 source[--AddrPtr[i]] = ',';
860
861 free(user);
862 free(node);
863 free(name);
864 free(AddrUtf8);
865 free(AddrPtr);
866 return Encoded;
867}
868
869
870// Unfold a multi-line field into a single line, removing multi-whitespaces
871void unfold_rfc822_field(char **field, char **FieldEnd)
872{
873 int quote = 0;
874 char *pField = *field;
875 char *sField;
876 char *pFieldEnd = *FieldEnd;
877
878 while (isspace(*pField))
879 pField++;
880 // remove leading/trailing whitespace
881 ;
882
883 while (isspace(*pFieldEnd))
884 pFieldEnd --;
885
886 *FieldEnd = pFieldEnd;
887 // convert non-space whitespace to spaces, and remove double blanks
888 for (sField = *field = pField;
889 sField < pFieldEnd;
890 pField++, sField++)
891 {
892 if ((*sField=='\r') || (*sField=='\n'))
893 {
894 int offset = 1;
895 while ( ( (*(sField + offset) == '\r') || (*(sField + offset) == '\n' )) && (sField + offset < pFieldEnd) ) {
896 offset ++;
897 }
898 sField += offset;
899 *pField = *sField;
900 }
901 else {
902 if (*sField=='\"') quote = 1 - quote;
903 if (!quote) {
904 if (isspace(*sField)) {
905 *pField = ' ';
906 pField++;
907 sField++;
908
909 while ((sField < pFieldEnd) &&
910 isspace(*sField))
911 sField++;
912 *pField = *sField;
913 }
914 else *pField = *sField;
915 }
916 else *pField = *sField;
917 }
918 }
919 *pField = '\0';
920 *FieldEnd = pField - 1;
921}
922
923
924// Split an RFC822-style address into userid, host, and full name
925//
926// Note: This still handles obsolete address syntaxes such as user%node@node and ...node!user
927// We should probably remove that.
928void process_rfc822_addr(const char *rfc822, char *user, char *node, char *name) {
929 int a;
930
931 strcpy(user, "");
932 strcpy(node, CtdlGetConfigStr("c_fqdn"));
933 strcpy(name, "");
934
935 if (rfc822 == NULL) return;
936
937 // extract full name - first, it's From minus <userid>
938 strcpy(name, rfc822);
939 stripout(name, '<', '>');
940
941 // strip anything to the left of a bang
942 while ((!IsEmptyStr(name)) && (haschar(name, '!') > 0))
943 strcpy(name, &name[1]);
944
945 // and anything to the right of a @ or %
946 for (a = 0; name[a] != '\0'; ++a) {
947 if (name[a] == '@') {
948 name[a] = 0;
949 break;
950 }
951 if (name[a] == '%') {
952 name[a] = 0;
953 break;
954 }
955 }
956
957 // but if there are parentheses, that changes the rules...
958 if ((haschar(rfc822, '(') == 1) && (haschar(rfc822, ')') == 1)) {
959 strcpy(name, rfc822);
960 stripallbut(name, '(', ')');
961 }
962
963 // but if there are a set of quotes, that supersedes everything
964 if (haschar(rfc822, 34) == 2) {
965 strcpy(name, rfc822);
966 while ((!IsEmptyStr(name)) && (name[0] != 34)) {
967 strcpy(&name[0], &name[1]);
968 }
969 strcpy(&name[0], &name[1]);
970 for (a = 0; name[a] != '\0'; ++a)
971 if (name[a] == 34) {
972 name[a] = 0;
973 break;
974 }
975 }
976 // extract user id
977 strcpy(user, rfc822);
978
979 // first get rid of anything in parens
980 stripout(user, '(', ')');
981
982 // if there's a set of angle brackets, strip it down to that
983 if ((haschar(user, '<') == 1) && (haschar(user, '>') == 1)) {
984 stripallbut(user, '<', '>');
985 }
986
987 // strip anything to the left of a bang
988 while ((!IsEmptyStr(user)) && (haschar(user, '!') > 0))
989 strcpy(user, &user[1]);
990
991 // and anything to the right of a @ or %
992 for (a = 0; user[a] != '\0'; ++a) {
993 if (user[a] == '@') {
994 user[a] = 0;
995 break;
996 }
997 if (user[a] == '%') {
998 user[a] = 0;
999 break;
1000 }
1001 }
1002
1003
1004 // extract node name
1005 strcpy(node, rfc822);
1006
1007 // first get rid of anything in parens
1008 stripout(node, '(', ')');
1009
1010 // if there's a set of angle brackets, strip it down to that
1011 if ((haschar(node, '<') == 1) && (haschar(node, '>') == 1)) {
1012 stripallbut(node, '<', '>');
1013 }
1014
1015 // If no node specified, tack ours on instead
1016 if (
1017 (haschar(node, '@')==0)
1018 && (haschar(node, '%')==0)
1019 && (haschar(node, '!')==0)
1020 ) {
1021 strcpy(node, CtdlGetConfigStr("c_nodename"));
1022 }
1023 else {
1024
1025 // strip anything to the left of a @
1026 while ((!IsEmptyStr(node)) && (haschar(node, '@') > 0))
1027 strcpy(node, &node[1]);
1028
1029 // strip anything to the left of a %
1030 while ((!IsEmptyStr(node)) && (haschar(node, '%') > 0))
1031 strcpy(node, &node[1]);
1032
1033 // reduce multiple system bang paths to node!user
1034 while ((!IsEmptyStr(node)) && (haschar(node, '!') > 1))
1035 strcpy(node, &node[1]);
1036
1037 // now get rid of the user portion of a node!user string
1038 for (a = 0; node[a] != '\0'; ++a)
1039 if (node[a] == '!') {
1040 node[a] = 0;
1041 break;
1042 }
1043 }
1044
1045 // strip leading and trailing spaces in all strings
1046 striplt(user);
1047 striplt(node);
1048 striplt(name);
1049
1050 // If we processed a string that had the address in angle brackets
1051 // but no name outside the brackets, we now have an empty name. In
1052 // this case, use the user portion of the address as the name.
1053 if ((IsEmptyStr(name)) && (!IsEmptyStr(user))) {
1054 strcpy(name, user);
1055 }
1056}
1057
1058
1059// convert_field() is a helper function for convert_internet_message().
1060// Given start/end positions for an rfc822 field, it converts it to a Citadel
1061// field if it wants to, and unfolds it if necessary.
1062//
1063// Returns 1 if the field was converted and inserted into the Citadel message
1064// structure, implying that the source field should be removed from the
1065// message text.
1066int convert_field(struct CtdlMessage *msg, const char *beg, const char *end) {
1067 char *key, *value, *valueend;
1068 long len;
1069 const char *pos;
1070 int i;
1071 const char *colonpos = NULL;
1072 int processed = 0;
1073 char user[1024];
1074 char node[1024];
1075 char name[1024];
1076 char addr[1024];
1077 time_t parsed_date;
1078 long valuelen;
1079
1080 for (pos = end; pos >= beg; pos--) {
1081 if (*pos == ':') colonpos = pos;
1082 }
1083
1084 if (colonpos == NULL) return(0); /* no colon? not a valid header line */
1085
1086 len = end - beg;
1087 key = malloc(len + 2);
1088 memcpy(key, beg, len + 1);
1089 key[len] = '\0';
1090 valueend = key + len;
1091 * ( key + (colonpos - beg) ) = '\0';
1092 value = &key[(colonpos - beg) + 1];
1093 // printf("Header: [%s]\nValue: [%s]\n", key, value);
1094 unfold_rfc822_field(&value, &valueend);
1095 valuelen = valueend - value + 1;
1096 // printf("UnfoldedValue: [%s]\n", value);
1097
1098 // Here's the big rfc822-to-citadel loop.
1099
1100 // Date/time is converted into a unix timestamp. If the conversion
1101 // fails, we replace it with the time the message arrived locally.
1102 if (!strcasecmp(key, "Date")) {
1103 parsed_date = parsedate(value);
1104 if (parsed_date < 0L) parsed_date = time(NULL);
1105
1106 if (CM_IsEmpty(msg, eTimestamp))
1107 CM_SetFieldLONG(msg, eTimestamp, parsed_date);
1108 processed = 1;
1109 }
1110
1111 else if (!strcasecmp(key, "From")) {
1112 process_rfc822_addr(value, user, node, name);
1113 syslog(LOG_DEBUG, "internet_addressing: converted to <%s@%s> (%s)", user, node, name);
1114 snprintf(addr, sizeof(addr), "%s@%s", user, node);
1115 if (CM_IsEmpty(msg, eAuthor) && !IsEmptyStr(name)) {
1116 CM_SetField(msg, eAuthor, name, -1);
1117 }
1118 if (CM_IsEmpty(msg, erFc822Addr) && !IsEmptyStr(addr)) {
1119 CM_SetField(msg, erFc822Addr, addr, -1);
1120 }
1121 processed = 1;
1122 }
1123
1124 else if (!strcasecmp(key, "Subject")) {
1125 if (CM_IsEmpty(msg, eMsgSubject))
1126 CM_SetField(msg, eMsgSubject, value, valuelen);
1127 processed = 1;
1128 }
1129
1130 else if (!strcasecmp(key, "List-ID")) {
1131 if (CM_IsEmpty(msg, eListID))
1132 CM_SetField(msg, eListID, value, valuelen);
1133 processed = 1;
1134 }
1135
1136 else if (!strcasecmp(key, "To")) {
1137 if (CM_IsEmpty(msg, eRecipient))
1138 CM_SetField(msg, eRecipient, value, valuelen);
1139 processed = 1;
1140 }
1141
1142 else if (!strcasecmp(key, "CC")) {
1143 if (CM_IsEmpty(msg, eCarbonCopY))
1144 CM_SetField(msg, eCarbonCopY, value, valuelen);
1145 processed = 1;
1146 }
1147
1148 else if (!strcasecmp(key, "Message-ID")) {
1149 if (!CM_IsEmpty(msg, emessageId)) {
1150 syslog(LOG_WARNING, "internet_addressing: duplicate message id");
1151 }
1152 else {
1153 char *pValue;
1154 long pValueLen;
1155
1156 pValue = value;
1157 pValueLen = valuelen;
1158 // Strip angle brackets
1159 while (haschar(pValue, '<') > 0) {
1160 pValue ++;
1161 pValueLen --;
1162 }
1163
1164 for (i = 0; i <= pValueLen; ++i)
1165 if (pValue[i] == '>') {
1166 pValueLen = i;
1167 break;
1168 }
1169
1170 CM_SetField(msg, emessageId, pValue, pValueLen);
1171 }
1172
1173 processed = 1;
1174 }
1175
1176 else if (!strcasecmp(key, "Return-Path")) {
1177 if (CM_IsEmpty(msg, eMessagePath))
1178 CM_SetField(msg, eMessagePath, value, valuelen);
1179 processed = 1;
1180 }
1181
1182 else if (!strcasecmp(key, "Envelope-To")) {
1183 if (CM_IsEmpty(msg, eenVelopeTo))
1184 CM_SetField(msg, eenVelopeTo, value, valuelen);
1185 processed = 1;
1186 }
1187
1188 else if (!strcasecmp(key, "References")) {
1189 CM_SetField(msg, eWeferences, value, valuelen);
1190 processed = 1;
1191 }
1192
1193 else if (!strcasecmp(key, "Reply-To")) {
1194 CM_SetField(msg, eReplyTo, value, valuelen);
1195 processed = 1;
1196 }
1197
1198 else if (!strcasecmp(key, "In-reply-to")) {
1199 if (CM_IsEmpty(msg, eWeferences)) // References: supersedes In-reply-to:
1200 CM_SetField(msg, eWeferences, value, valuelen);
1201 processed = 1;
1202 }
1203
1204
1205
1206 // Clean up and move on.
1207 free(key); // Don't free 'value', it's actually the same buffer
1208 return processed;
1209}
1210
1211
1212// Convert RFC822 references format (References) to Citadel references format (Weferences)
1214 int bracket_nesting = 0;
1215 char *ptr = str;
1216 char *moveptr = NULL;
1217 char ch;
1218
1219 while(*ptr) {
1220 ch = *ptr;
1221 if (ch == '>') {
1222 --bracket_nesting;
1223 if (bracket_nesting < 0) bracket_nesting = 0;
1224 }
1225 if ((ch == '>') && (bracket_nesting == 0) && (*(ptr+1)) && (ptr>str) ) {
1226 *ptr = '|';
1227 ++ptr;
1228 }
1229 else if (bracket_nesting > 0) {
1230 ++ptr;
1231 }
1232 else {
1233 moveptr = ptr;
1234 while (*moveptr) {
1235 *moveptr = *(moveptr+1);
1236 ++moveptr;
1237 }
1238 }
1239 if (ch == '<') ++bracket_nesting;
1240 }
1241
1242}
1243
1244
1245// Convert an RFC822 message (headers + body) to a CtdlMessage structure.
1246// NOTE: the supplied buffer becomes part of the CtdlMessage structure, and
1247// will be deallocated when CM_Free() is called. Therefore, the
1248// supplied buffer should be DEREFERENCED. It should not be freed or used
1249// again.
1251 StrBuf *RFCBuf = NewStrBufPlain(rfc822, -1);
1252 free (rfc822);
1253 return convert_internet_message_buf(&RFCBuf);
1254}
1255
1256
1258{
1259 struct CtdlMessage *msg;
1260 const char *pos, *beg, *end, *totalend;
1261 int done, alldone = 0;
1262 int converted;
1263 StrBuf *OtherHeaders;
1264
1265 msg = malloc(sizeof(struct CtdlMessage));
1266 if (msg == NULL) return msg;
1267
1268 memset(msg, 0, sizeof(struct CtdlMessage));
1269 msg->cm_magic = CTDLMESSAGE_MAGIC; // self check
1270 msg->cm_anon_type = 0; // never anonymous
1271 msg->cm_format_type = FMT_RFC822; // internet message
1272
1273 pos = ChrPtr(*rfc822);
1274 totalend = pos + StrLength(*rfc822);
1275 done = 0;
1276 OtherHeaders = NewStrBufPlain(NULL, StrLength(*rfc822));
1277
1278 while (!alldone) {
1279
1280 /* Locate beginning and end of field, keeping in mind that
1281 * some fields might be multiline
1282 */
1283 end = beg = pos;
1284
1285 while ((end < totalend) &&
1286 (end == beg) &&
1287 (done == 0) )
1288 {
1289
1290 if ( (*pos=='\n') && ((*(pos+1))!=0x20) && ((*(pos+1))!=0x09) )
1291 {
1292 end = pos;
1293 }
1294
1295 /* done with headers? */
1296 if ((*pos=='\n') &&
1297 ( (*(pos+1)=='\n') ||
1298 (*(pos+1)=='\r')) )
1299 {
1300 alldone = 1;
1301 }
1302
1303 if (pos >= (totalend - 1) )
1304 {
1305 end = pos;
1306 done = 1;
1307 }
1308
1309 ++pos;
1310
1311 }
1312
1313 /* At this point we have a field. Are we interested in it? */
1314 converted = convert_field(msg, beg, end);
1315
1316 /* Strip the field out of the RFC822 header if we used it */
1317 if (!converted) {
1318 StrBufAppendBufPlain(OtherHeaders, beg, end - beg, 0);
1319 StrBufAppendBufPlain(OtherHeaders, HKEY("\n"), 0);
1320 }
1321
1322 /* If we've hit the end of the message, bail out */
1323 if (pos >= totalend)
1324 alldone = 1;
1325 }
1326 StrBufAppendBufPlain(OtherHeaders, HKEY("\n"), 0);
1327 if (pos < totalend)
1328 StrBufAppendBufPlain(OtherHeaders, pos, totalend - pos, 0);
1329 FreeStrBuf(rfc822);
1330 CM_SetAsFieldSB(msg, eMesageText, &OtherHeaders);
1331
1332 /* Follow-up sanity checks... */
1333
1334 /* If there's no timestamp on this message, set it to now. */
1335 if (CM_IsEmpty(msg, eTimestamp)) {
1336 CM_SetFieldLONG(msg, eTimestamp, time(NULL));
1337 }
1338
1339 /* If a W (references, or rather, Wefewences) field is present, we
1340 * have to convert it from RFC822 format to Citadel format.
1341 */
1342 if (!CM_IsEmpty(msg, eWeferences)) {
1343 /// todo: API!
1345 }
1346
1347 return msg;
1348}
1349
1350
1351/*
1352 * Look for a particular header field in an RFC822 message text. If the
1353 * requested field is found, it is unfolded (if necessary) and returned to
1354 * the caller. The field name is stripped out, leaving only its contents.
1355 * The caller is responsible for freeing the returned buffer. If the requested
1356 * field is not present, or anything else goes wrong, it returns NULL.
1357 */
1358char *rfc822_fetch_field(const char *rfc822, const char *fieldname) {
1359 char *fieldbuf = NULL;
1360 const char *end_of_headers;
1361 const char *field_start;
1362 const char *ptr;
1363 char *cont;
1364 char fieldhdr[SIZ];
1365
1366 /* Should never happen, but sometimes we get stupid */
1367 if (rfc822 == NULL) return(NULL);
1368 if (fieldname == NULL) return(NULL);
1369
1370 snprintf(fieldhdr, sizeof fieldhdr, "%s:", fieldname);
1371
1372 /* Locate the end of the headers, so we don't run past that point */
1373 end_of_headers = cbmstrcasestr(rfc822, "\n\r\n");
1374 if (end_of_headers == NULL) {
1375 end_of_headers = cbmstrcasestr(rfc822, "\n\n");
1376 }
1377 if (end_of_headers == NULL) return (NULL);
1378
1379 field_start = cbmstrcasestr(rfc822, fieldhdr);
1380 if (field_start == NULL) return(NULL);
1381 if (field_start > end_of_headers) return(NULL);
1382
1383 fieldbuf = malloc(SIZ);
1384 strcpy(fieldbuf, "");
1385
1386 ptr = field_start;
1387 ptr = cmemreadline(ptr, fieldbuf, SIZ-strlen(fieldbuf) );
1388 while ( (isspace(ptr[0])) && (ptr < end_of_headers) ) {
1389 strcat(fieldbuf, " ");
1390 cont = &fieldbuf[strlen(fieldbuf)];
1391 ptr = cmemreadline(ptr, cont, SIZ-strlen(fieldbuf) );
1392 striplt(cont);
1393 }
1394
1395 strcpy(fieldbuf, &fieldbuf[strlen(fieldhdr)]);
1396 striplt(fieldbuf);
1397
1398 return(fieldbuf);
1399}
1400
1401
1402/*****************************************************************************
1403 * DIRECTORY MANAGEMENT FUNCTIONS *
1404 *****************************************************************************/
1405
1406/*
1407 * Generate the index key for an Internet e-mail address to be looked up
1408 * in the database.
1409 */
1410void directory_key(char *key, char *addr) {
1411 int i;
1412 int keylen = 0;
1413
1414 for (i=0; !IsEmptyStr(&addr[i]); ++i) {
1415 if (!isspace(addr[i])) {
1416 key[keylen++] = tolower(addr[i]);
1417 }
1418 }
1419 key[keylen++] = 0;
1420
1421 syslog(LOG_DEBUG, "internet_addressing: directory key is <%s>", key);
1422}
1423
1424
1425/*
1426 * Return nonzero if the supplied address is in one of "our" domains
1427 */
1428int IsDirectory(char *addr, int allow_masq_domains) {
1429 char domain[256];
1430 int h;
1431
1432 extract_token(domain, addr, 1, '@', sizeof domain);
1433 striplt(domain);
1434
1435 h = CtdlHostAlias(domain);
1436
1437 if ( (h == hostalias_masq) && allow_masq_domains)
1438 return(1);
1439
1440 if (h == hostalias_localhost) {
1441 return(1);
1442 }
1443 else {
1444 return(0);
1445 }
1446}
1447
1448
1449/*
1450 * Add an Internet e-mail address to the directory for a user
1451 */
1452int CtdlDirectoryAddUser(char *internet_addr, char *citadel_addr) {
1453 char key[SIZ];
1454
1455 if (IsDirectory(internet_addr, 0) == 0) {
1456 return 0;
1457 }
1458 syslog(LOG_DEBUG, "internet_addressing: create directory entry: %s --> %s", internet_addr, citadel_addr);
1459 directory_key(key, internet_addr);
1460 cdb_store(CDB_DIRECTORY, key, strlen(key), citadel_addr, strlen(citadel_addr)+1 );
1461 return 1;
1462}
1463
1464
1465/*
1466 * Delete an Internet e-mail address from the directory.
1467 *
1468 * (NOTE: we don't actually use or need the citadel_addr variable; it's merely
1469 * here because the callback API expects to be able to send it.)
1470 */
1471int CtdlDirectoryDelUser(char *internet_addr, char *citadel_addr) {
1472 char key[SIZ];
1473
1474 syslog(LOG_DEBUG, "internet_addressing: delete directory entry: %s --> %s", internet_addr, citadel_addr);
1475 directory_key(key, internet_addr);
1476 return cdb_delete(CDB_DIRECTORY, key, strlen(key) ) == 0;
1477}
1478
1479
1480/*
1481 * Look up an Internet e-mail address in the directory.
1482 * On success: returns 0, and Citadel address stored in 'target'
1483 * On failure: returns nonzero
1484 */
1485int CtdlDirectoryLookup(char *target, char *internet_addr, size_t targbuflen) {
1486 struct cdbdata *cdbrec;
1487 char key[SIZ];
1488
1489 /* Dump it in there unchanged, just for kicks */
1490 if (target != NULL) {
1491 safestrncpy(target, internet_addr, targbuflen);
1492 }
1493
1494 /* Only do lookups for addresses with hostnames in them */
1495 if (num_tokens(internet_addr, '@') != 2) return(-1);
1496
1497 /* Only do lookups for domains in the directory */
1498 if (IsDirectory(internet_addr, 0) == 0) return(-1);
1499
1500 directory_key(key, internet_addr);
1501 cdbrec = cdb_fetch(CDB_DIRECTORY, key, strlen(key) );
1502 if (cdbrec != NULL) {
1503 if (target != NULL) {
1504 safestrncpy(target, cdbrec->ptr, targbuflen);
1505 }
1506 cdb_free(cdbrec);
1507 return(0);
1508 }
1509
1510 return(-1);
1511}
1512
1513
1514/*
1515 * Harvest any email addresses that someone might want to have in their
1516 * "collected addresses" book.
1517 */
1519 char *coll = NULL;
1520 char addr[256];
1521 char user[256], node[256], name[256];
1522 int is_harvestable;
1523 int i, j, h;
1524 eMsgField field = 0;
1525
1526 if (msg == NULL) return(NULL);
1527
1528 is_harvestable = 1;
1529 strcpy(addr, "");
1530 if (!CM_IsEmpty(msg, eAuthor)) {
1531 strcat(addr, msg->cm_fields[eAuthor]);
1532 }
1533 if (!CM_IsEmpty(msg, erFc822Addr)) {
1534 strcat(addr, " <");
1535 strcat(addr, msg->cm_fields[erFc822Addr]);
1536 strcat(addr, ">");
1537 if (IsDirectory(msg->cm_fields[erFc822Addr], 0)) {
1538 is_harvestable = 0;
1539 }
1540 }
1541
1542 if (is_harvestable) {
1543 coll = strdup(addr);
1544 }
1545 else {
1546 coll = strdup("");
1547 }
1548
1549 if (coll == NULL) return(NULL);
1550
1551 /* Scan both the R (To) and Y (CC) fields */
1552 for (i = 0; i < 2; ++i) {
1553 if (i == 0) field = eRecipient;
1554 if (i == 1) field = eCarbonCopY;
1555
1556 if (!CM_IsEmpty(msg, field)) {
1557 for (j=0; j<num_tokens(msg->cm_fields[field], ','); ++j) {
1558 extract_token(addr, msg->cm_fields[field], j, ',', sizeof addr);
1559 if (strstr(addr, "=?") != NULL)
1561 process_rfc822_addr(addr, user, node, name);
1562 h = CtdlHostAlias(node);
1563 if (h != hostalias_localhost) {
1564 coll = realloc(coll, strlen(coll) + strlen(addr) + 4);
1565 if (coll == NULL) return(NULL);
1566 if (!IsEmptyStr(coll)) {
1567 strcat(coll, ",");
1568 }
1569 striplt(addr);
1570 strcat(coll, addr);
1571 }
1572 }
1573 }
1574 }
1575
1576 if (IsEmptyStr(coll)) {
1577 free(coll);
1578 return(NULL);
1579 }
1580 return(coll);
1581}
1582
1583
1584/*
1585 * Helper function for CtdlRebuildDirectoryIndex()
1586 */
1587void CtdlRebuildDirectoryIndex_backend(char *username, void *data) {
1588
1589 int j = 0;
1590 struct ctdluser usbuf;
1591
1592 if (CtdlGetUser(&usbuf, username) != 0) {
1593 return;
1594 }
1595
1596 if ( (!IsEmptyStr(usbuf.fullname)) && (!IsEmptyStr(usbuf.emailaddrs)) ) {
1597 for (j=0; j<num_tokens(usbuf.emailaddrs, '|'); ++j) {
1598 char one_email[512];
1599 extract_token(one_email, usbuf.emailaddrs, j, '|', sizeof one_email);
1601 }
1602 }
1603}
1604
1605
1606/*
1607 * Initialize the directory database (erasing anything already there)
1608 */
1610 syslog(LOG_INFO, "internet_addressing: rebuilding email address directory index");
1613}
1614
1615
1616// Configure Internet email addresses for a user account, updating the Directory Index in the process
1617void CtdlSetEmailAddressesForUser(char *requested_user, char *new_emailaddrs) {
1618 struct ctdluser usbuf;
1619 int i;
1620 char buf[SIZ];
1621
1622 if (CtdlGetUserLock(&usbuf, requested_user) != 0) { // We can lock because the DirectoryIndex functions don't lock.
1623 return; // Silently fail here if the specified user does not exist.
1624 }
1625
1626 syslog(LOG_DEBUG, "internet_addressing: setting email addresses for <%s> to <%s>", usbuf.fullname, new_emailaddrs);
1627
1628 // Delete all of the existing directory index records for the user (easier this way)
1629 for (i=0; i<num_tokens(usbuf.emailaddrs, '|'); ++i) {
1630 extract_token(buf, usbuf.emailaddrs, i, '|', sizeof buf);
1631 CtdlDirectoryDelUser(buf, requested_user);
1632 }
1633
1634 strcpy(usbuf.emailaddrs, new_emailaddrs); // make it official.
1635
1636 // Index all of the new email addresses (they've already been sanitized)
1637 for (i=0; i<num_tokens(usbuf.emailaddrs, '|'); ++i) {
1638 extract_token(buf, usbuf.emailaddrs, i, '|', sizeof buf);
1639 CtdlDirectoryAddUser(buf, requested_user);
1640 }
1641
1643}
1644
1645
1646/*
1647 * Auto-generate an Internet email address for a user account
1648 */
1650 char synthetic_email_addr[1024];
1651 int i, j;
1652 int u = 0;
1653
1654 for (i=0; u==0; ++i) {
1655 if (i == 0) {
1656 // first try just converting the user name to lowercase and replacing spaces with underscores
1657 snprintf(synthetic_email_addr, sizeof synthetic_email_addr, "%s@%s", user->fullname, CtdlGetConfigStr("c_fqdn"));
1658 for (j=0; ((synthetic_email_addr[j] != '\0')&&(synthetic_email_addr[j] != '@')); j++) {
1659 synthetic_email_addr[j] = tolower(synthetic_email_addr[j]);
1660 if (!isalnum(synthetic_email_addr[j])) {
1661 synthetic_email_addr[j] = '_';
1662 }
1663 }
1664 }
1665 else if (i == 1) {
1666 // then try 'ctdl' followed by the user number
1667 snprintf(synthetic_email_addr, sizeof synthetic_email_addr, "ctdl%08lx@%s", user->usernum, CtdlGetConfigStr("c_fqdn"));
1668 }
1669 else if (i > 1) {
1670 // oof. just keep trying other numbers until we find one
1671 snprintf(synthetic_email_addr, sizeof synthetic_email_addr, "ctdl%08x@%s", i, CtdlGetConfigStr("c_fqdn"));
1672 }
1673 u = CtdlDirectoryLookup(NULL, synthetic_email_addr, 0);
1674 syslog(LOG_DEBUG, "user_ops: address <%s> lookup returned <%d>", synthetic_email_addr, u);
1675 }
1676
1677 CtdlSetEmailAddressesForUser(user->fullname, synthetic_email_addr);
1678 strncpy(CC->user.emailaddrs, synthetic_email_addr, sizeof(user->emailaddrs));
1679 syslog(LOG_DEBUG, "user_ops: auto-generated email address <%s> for <%s>", synthetic_email_addr, user->fullname);
1680}
1681
1682
1683// Determine whether the supplied email address is subscribed to the supplied room's mailing list service.
1684int is_email_subscribed_to_list(char *email, char *room_name) {
1685 struct ctdlroom room;
1686 long roomnum;
1687 char *roomnetconfig;
1688 int found_it = 0;
1689
1690 if (CtdlGetRoom(&room, room_name)) {
1691 return(0); // room not found, so definitely not subscribed
1692 }
1693
1694 // If this room has the QR2_SMTP_PUBLIC flag set, anyone may email a post to this room, even non-subscribers.
1695 if (room.QRflags2 & QR2_SMTP_PUBLIC) {
1696 return(1);
1697 }
1698
1699 roomnum = room.QRnumber;
1700 roomnetconfig = LoadRoomNetConfigFile(roomnum);
1701 if (roomnetconfig == NULL) {
1702 return(0);
1703 }
1704
1705 // We're going to do a very sloppy match here and simply search for the specified email address
1706 // anywhere in the room's netconfig. If you don't like this, fix it yourself.
1707 if (bmstrcasestr(roomnetconfig, email)) {
1708 found_it = 1;
1709 }
1710 else {
1711 found_it = 0;
1712 }
1713
1714 free(roomnetconfig);
1715 return(found_it);
1716}
#define ROOMNAMELEN
Definition: citadel.h:51
char * CtdlGetConfigStr(char *key)
Definition: config.c:364
char * CtdlGetSysConfig(char *sysconfname)
Definition: config.c:412
#define CC
Definition: context.h:140
int CtdlGetRoom(struct ctdlroom *qrbuf, const char *room_name)
Definition: room_ops.c:318
char * LoadRoomNetConfigFile(long roomnum)
Definition: netconfig.c:66
int CtdlGetUserLock(struct ctdluser *usbuf, char *name)
Definition: user_ops.c:100
void CtdlPutUserLock(struct ctdluser *usbuf)
Definition: user_ops.c:126
int CtdlGetUser(struct ctdluser *usbuf, char *name)
Definition: user_ops.c:69
void cdb_free(struct cdbdata *cdb)
Definition: database.c:605
int cdb_store(int cdb, const void *ckey, int ckeylen, void *cdata, int cdatalen)
Definition: database.c:393
struct cdbdata * cdb_fetch(int cdb, const void *key, int keylen)
Definition: database.c:542
int cdb_delete(int cdb, void *key, int keylen)
Definition: database.c:478
void cdb_trunc(int cdb)
Definition: database.c:722
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)
#define FindNextEnd(bptr, end)
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)
void utf8ify_rfc822_string(char *buf)
char * qp_encode_email_addrs(char *source)
void convert_references_to_wefewences(char *str)
int is_email_subscribed_to_list(char *email, char *room_name)
void AutoGenerateEmailAddressForUser(struct ctdluser *user)
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
#define QR2_SMTP_PUBLIC
Definition: ipcdef.h:59
int CM_IsEmpty(struct CtdlMessage *Msg, eMsgField which)
Definition: msgbase.c:138
void CM_SetField(struct CtdlMessage *Msg, eMsgField which, const char *buf, long length)
Definition: msgbase.c:143
void CM_SetFieldLONG(struct CtdlMessage *Msg, eMsgField which, long lvalue)
Definition: msgbase.c:157
void CM_SetAsFieldSB(struct CtdlMessage *Msg, eMsgField which, StrBuf **buf)
Definition: msgbase.c:259
time_t parsedate(const char *p)
Definition: parsedate.c:2177
void * malloc(unsigned)
void free(void *)
int CtdlDoIHavePermissionToPostInThisRoom(char *errmsgbuf, size_t n, PostType PostPublic, int is_reply)
Definition: room_ops.c:41
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:64
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
unsigned QRflags2
Definition: citadel.h:107
long QRnumber
Definition: citadel.h:105
char fullname[64]
Definition: citadel.h:80
long usernum
Definition: citadel.h:77
char emailaddrs[512]
Definition: citadel.h:83
char * recp_room
Definition: server.h:56
char * display_recp
Definition: server.h:58
int recptypes_magic
Definition: server.h:48
int num_internet
Definition: server.h:50
char * bounce_to
Definition: server.h:59
int num_room
Definition: server.h:51
char * recp_local
Definition: server.h:54
char * recp_orgroom
Definition: server.h:57
int num_error
Definition: server.h:52
char * sending_room
Definition: server.h:61
char * envelope_from
Definition: server.h:60
char * recp_internet
Definition: server.h:55
char * errormsg
Definition: server.h:53
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:1087