2 * This file contains functions which handle the mapping of Internet addresses
3 * to users on the Citadel system.
5 * Copyright (c) 1987-2017 by the citadel.org team
7 * This program is open source software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 3.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
25 #include <sys/types.h>
30 #include <libcitadel.h>
33 #include "sysdep_decls.h"
34 #include "citserver.h"
38 #include "internet_addressing.h"
41 #include "parsedate.h"
43 #include "ctdl_module.h"
48 /* This is the non-define version in case it is needed for debugging */
49 inline void FindNextEnd (char *bptr, char *end)
51 /* Find the next ?Q? */
52 end = strchr(bptr + 2, '?');
53 if (end == NULL) return NULL;
54 if (((*(end + 1) == 'B') || (*(end + 1) == 'Q')) &&
55 (*(end + 2) == '?')) {
56 /* skip on to the end of the cluster, the next ?= */
57 end = strstr(end + 3, "?=");
60 /* sort of half valid encoding, try to find an end. */
61 end = strstr(bptr, "?=");
65 #define FindNextEnd(bptr, end) { \
66 end = strchr(bptr + 2, '?'); \
68 if (((*(end + 1) == 'B') || (*(end + 1) == 'Q')) && (*(end + 2) == '?')) { \
69 end = strstr(end + 3, "?="); \
70 } else end = strstr(bptr, "?="); \
75 * Handle subjects with RFC2047 encoding such as:
76 * =?koi8-r?B?78bP0s3Mxc7JxSDXz9rE1dvO2c3JINvB0sHNySDP?=
78 void utf8ify_rfc822_string(char *buf) {
79 char *start, *end, *next, *nextend, *ptr;
84 iconv_t ic = (iconv_t)(-1) ;
85 char *ibuf; // Buffer of characters to be converted
86 char *obuf; // Buffer for converted characters
87 size_t ibuflen; // Length of input buffer
88 size_t obuflen; // Length of output buffer
89 char *isav; // Saved pointer to input buffer
90 char *osav; // Saved pointer to output buffer
93 int illegal_non_rfc2047_encoding = 0;
95 /* Sometimes, badly formed messages contain strings which were simply
96 * written out directly in some foreign character set instead of
97 * using RFC2047 encoding. This is illegal but we will attempt to
98 * handle it anyway by converting from a user-specified default
99 * charset to UTF-8 if we see any nonprintable characters.
102 for (i=0; i<len; ++i) {
103 if ((buf[i] < 32) || (buf[i] > 126)) {
104 illegal_non_rfc2047_encoding = 1;
105 i = len; // take a shortcut, it won't be more than one.
108 if (illegal_non_rfc2047_encoding) {
109 const char *default_header_charset = "iso-8859-1";
110 if ( (strcasecmp(default_header_charset, "UTF-8")) && (strcasecmp(default_header_charset, "us-ascii")) ) {
111 ctdl_iconv_open("UTF-8", default_header_charset, &ic);
112 if (ic != (iconv_t)(-1) ) {
115 safestrncpy(ibuf, buf, 1024);
116 ibuflen = strlen(ibuf);
118 obuf = (char *) malloc(obuflen);
120 iconv(ic, &ibuf, &ibuflen, &obuf, &obuflen);
121 osav[1024-obuflen] = 0;
130 /* pre evaluate the first pair */
131 nextend = end = NULL;
133 start = strstr(buf, "=?");
135 FindNextEnd (start, end);
137 while ((start != NULL) && (end != NULL))
139 next = strstr(end, "=?");
141 FindNextEnd(next, nextend);
145 /* did we find two partitions */
146 if ((next != NULL) &&
150 while ((ptr < next) &&
156 /* did we find a gab just filled with blanks? */
161 len - (next - start));
163 /* now terminate the gab at the end */
164 delta = (next - end) - 2;
168 /* move next to its new location. */
173 /* our next-pair is our new first pair now. */
178 /* Now we handle foreign character sets properly encoded
181 start = strstr(buf, "=?");
182 FindNextEnd((start != NULL)? start : buf, end);
183 while (start != NULL && end != NULL && end > start)
185 extract_token(charset, start, 1, '?', sizeof charset);
186 extract_token(encoding, start, 2, '?', sizeof encoding);
187 extract_token(istr, start, 3, '?', sizeof istr);
191 if (!strcasecmp(encoding, "B")) { // base64
192 ibuflen = CtdlDecodeBase64(ibuf, istr, strlen(istr));
194 else if (!strcasecmp(encoding, "Q")) { // quoted-printable
202 if (istr[pos] == '_') istr[pos] = ' ';
206 ibuflen = CtdlDecodeQuotedPrintable(ibuf, istr, len);
209 strcpy(ibuf, istr); // unknown encoding
210 ibuflen = strlen(istr);
213 ctdl_iconv_open("UTF-8", charset, &ic);
214 if (ic != (iconv_t)(-1) ) {
216 obuf = (char *) malloc(obuflen);
218 iconv(ic, &ibuf, &ibuflen, &obuf, &obuflen);
219 osav[1024-obuflen] = 0;
224 remove_token(end, 0, '?');
225 remove_token(end, 0, '?');
226 remove_token(end, 0, '?');
227 remove_token(end, 0, '?');
228 strcpy(end, &end[1]);
230 snprintf(newbuf, sizeof newbuf, "%s%s%s", buf, osav, end);
239 remove_token(end, 0, '?');
240 remove_token(end, 0, '?');
241 remove_token(end, 0, '?');
242 remove_token(end, 0, '?');
243 strcpy(end, &end[1]);
245 snprintf(newbuf, sizeof newbuf, "%s(unreadable)%s", buf, end);
252 * Since spammers will go to all sorts of absurd lengths to get their
253 * messages through, there are LOTS of corrupt headers out there.
254 * So, prevent a really badly formed RFC2047 header from throwing
255 * this function into an infinite loop.
258 if (passes > 20) return;
260 start = strstr(buf, "=?");
261 FindNextEnd((start != NULL)? start : buf, end);
266 inline void utf8ify_rfc822_string(char *a){};
276 char *inetcfg = NULL;
279 * Return nonzero if the supplied name is an alias for this host.
281 int CtdlHostAlias(char *fqdn) {
285 char host[256], type[256];
288 if (fqdn == NULL) return(hostalias_nomatch);
289 if (IsEmptyStr(fqdn)) return(hostalias_nomatch);
290 if (!strcasecmp(fqdn, "localhost")) return(hostalias_localhost);
291 if (!strcasecmp(fqdn, CtdlGetConfigStr("c_fqdn"))) return(hostalias_localhost);
292 if (!strcasecmp(fqdn, CtdlGetConfigStr("c_nodename"))) return(hostalias_localhost);
293 if (inetcfg == NULL) return(hostalias_nomatch);
295 config_lines = num_tokens(inetcfg, '\n');
296 for (i=0; i<config_lines; ++i) {
297 extract_token(buf, inetcfg, i, '\n', sizeof buf);
298 extract_token(host, buf, 0, '|', sizeof host);
299 extract_token(type, buf, 1, '|', sizeof type);
303 /* Process these in a specific order, in case there are multiple matches.
304 * We want localhost to override masq, for example.
307 if ( (!strcasecmp(type, "masqdomain")) && (!strcasecmp(fqdn, host))) {
308 found = hostalias_masq;
311 if ( (!strcasecmp(type, "localhost")) && (!strcasecmp(fqdn, host))) {
312 found = hostalias_localhost;
315 // "directory" used to be a distributed version of "localhost" but they're both the same now
316 if ( (!strcasecmp(type, "directory")) && (!strcasecmp(fqdn, host))) {
317 found = hostalias_localhost;
320 if (found) return(found);
322 return(hostalias_nomatch);
327 * Determine whether a given Internet address belongs to the current user
329 int CtdlIsMe(char *addr, int addr_buf_len)
334 recp = validate_recipients(addr, NULL, 0);
335 if (recp == NULL) return(0);
337 if (recp->num_local == 0) {
338 free_recipients(recp);
342 for (i=0; i<recp->num_local; ++i) {
343 extract_token(addr, recp->recp_local, i, '|', addr_buf_len);
344 if (!strcasecmp(addr, CC->user.fullname)) {
345 free_recipients(recp);
350 free_recipients(recp);
355 /* If the last item in a list of recipients was truncated to a partial address,
356 * remove it completely in order to avoid choking libSieve
358 void sanitize_truncated_recipient(char *str)
361 if (num_tokens(str, ',') < 2) return;
363 int len = strlen(str);
364 if (len < 900) return;
365 if (len > 998) str[998] = 0;
367 char *cptr = strrchr(str, ',');
370 char *lptr = strchr(cptr, '<');
371 char *rptr = strchr(cptr, '>');
373 if ( (lptr) && (rptr) && (rptr > lptr) ) return;
380 * This function is self explanatory.
381 * (What can I say, I'm in a weird mood today...)
383 void remove_any_whitespace_to_the_left_or_right_of_at_symbol(char *name)
387 for (i = 0; i < strlen(name); ++i) {
388 if (name[i] == '@') {
389 while (isspace(name[i - 1]) && i > 0) {
390 strcpy(&name[i - 1], &name[i]);
393 while (isspace(name[i + 1])) {
394 strcpy(&name[i + 1], &name[i + 2]);
402 * Aliasing for network mail.
404 int alias(char *name)
405 { /* process alias and routing info for mail */
408 char aaa[SIZ], bbb[SIZ];
409 char *ignetcfg = NULL;
410 char *ignetmap = NULL;
416 char original_name[256];
417 safestrncpy(original_name, name, sizeof original_name);
420 remove_any_whitespace_to_the_left_or_right_of_at_symbol(name);
421 stripallbut(name, '<', '>');
423 fp = fopen(file_mail_aliases, "r"); // when are we going to get rid of this?
425 fp = fopen("/dev/null", "r");
432 while (fgets(aaa, sizeof aaa, fp) != NULL) {
433 while (isspace(name[0]))
434 strcpy(name, &name[1]);
435 aaa[strlen(aaa) - 1] = 0;
437 for (a = 0; aaa[a] != '\0'; ++a) {
439 strcpy(bbb, &aaa[a + 1]);
444 if (!strcasecmp(name, aaa))
449 /* Hit the email address directory */
450 if (CtdlDirectoryLookup(aaa, name, sizeof aaa) == 0) {
454 if (strcasecmp(original_name, name)) {
455 syslog(LOG_INFO, "internet_addressing: %s is being forwarded to %s", original_name, name);
458 /* Change "user @ xxx" to "user" if xxx is an alias for this host */
459 for (a=0; name[a] != '\0'; ++a) {
460 if (name[a] == '@') {
461 if (CtdlHostAlias(&name[a+1]) == hostalias_localhost) {
463 syslog(LOG_DEBUG, "internet_addressing: changed to <%s>", name);
469 /* determine local or remote type, see citadel.h */
470 at = haschar(name, '@');
471 if (at == 0) return(MES_LOCAL); /* no @'s - local address */
472 if (at > 1) return(MES_ERROR); /* >1 @'s - invalid address */
473 remove_any_whitespace_to_the_left_or_right_of_at_symbol(name);
475 /* figure out the delivery mode */
476 extract_token(node, name, 1, '@', sizeof node);
478 /* If there are one or more dots in the nodename, we assume that it
479 * is an FQDN and will attempt SMTP delivery to the Internet.
481 if (haschar(node, '.') > 0) {
482 return(MES_INTERNET);
485 /* Otherwise we look in the IGnet maps for a valid Citadel node.
486 * Try directly-connected nodes first...
488 ignetcfg = CtdlGetSysConfig(IGNETCFG);
489 for (i=0; i<num_tokens(ignetcfg, '\n'); ++i) {
490 extract_token(buf, ignetcfg, i, '\n', sizeof buf);
491 extract_token(testnode, buf, 0, '|', sizeof testnode);
492 if (!strcasecmp(node, testnode)) {
500 * Then try nodes that are two or more hops away.
502 ignetmap = CtdlGetSysConfig(IGNETMAP);
503 for (i=0; i<num_tokens(ignetmap, '\n'); ++i) {
504 extract_token(buf, ignetmap, i, '\n', sizeof buf);
505 extract_token(testnode, buf, 0, '|', sizeof testnode);
506 if (!strcasecmp(node, testnode)) {
513 /* If we get to this point it's an invalid node name */
519 * Validate recipients, count delivery types and errors, and handle aliasing
520 * FIXME check for dupes!!!!!
522 * Returns 0 if all addresses are ok, ret->num_error = -1 if no addresses
523 * were specified, or the number of addresses found invalid.
525 * Caller needs to free the result using free_recipients()
527 recptypes *validate_recipients(const char *supplied_recipients, const char *RemoteIdentifier, int Flags)
529 struct CitContext *CCC = CC;
531 char *recipients = NULL;
534 char this_recp_cooked[256];
541 struct ctdluser tempUS;
542 struct ctdlroom tempQR;
543 struct ctdlroom tempQR2;
549 ret = (recptypes *) malloc(sizeof(recptypes));
550 if (ret == NULL) return(NULL);
552 /* Set all strings to null and numeric values to zero */
553 memset(ret, 0, sizeof(recptypes));
555 if (supplied_recipients == NULL) {
556 recipients = strdup("");
559 recipients = strdup(supplied_recipients);
562 /* Allocate some memory. Yes, this allocates 500% more memory than we will
563 * actually need, but it's healthier for the heap than doing lots of tiny
564 * realloc() calls instead.
566 len = strlen(recipients) + 1024;
567 ret->errormsg = malloc(len);
568 ret->recp_local = malloc(len);
569 ret->recp_internet = malloc(len);
570 ret->recp_ignet = malloc(len);
571 ret->recp_room = malloc(len);
572 ret->display_recp = malloc(len);
573 ret->recp_orgroom = malloc(len);
574 org_recp = malloc(len);
576 ret->errormsg[0] = 0;
577 ret->recp_local[0] = 0;
578 ret->recp_internet[0] = 0;
579 ret->recp_ignet[0] = 0;
580 ret->recp_room[0] = 0;
581 ret->recp_orgroom[0] = 0;
582 ret->display_recp[0] = 0;
584 ret->recptypes_magic = RECPTYPES_MAGIC;
586 /* Change all valid separator characters to commas */
587 for (i=0; !IsEmptyStr(&recipients[i]); ++i) {
588 if ((recipients[i] == ';') || (recipients[i] == '|')) {
593 /* Now start extracting recipients... */
595 while (!IsEmptyStr(recipients)) {
596 for (i=0; i<=strlen(recipients); ++i) {
597 if (recipients[i] == '\"') in_quotes = 1 - in_quotes;
598 if ( ( (recipients[i] == ',') && (!in_quotes) ) || (recipients[i] == 0) ) {
599 safestrncpy(this_recp, recipients, i+1);
601 if (recipients[i] == ',') {
602 strcpy(recipients, &recipients[i+1]);
605 strcpy(recipients, "");
612 if (IsEmptyStr(this_recp))
614 syslog(LOG_DEBUG, "internet_addressing: evaluating recipient #%d: %s", num_recps, this_recp);
617 strcpy(org_recp, this_recp);
620 mailtype = alias(this_recp);
622 for (j = 0; !IsEmptyStr(&this_recp[j]); ++j) {
623 if (this_recp[j]=='_') {
624 this_recp_cooked[j] = ' ';
627 this_recp_cooked[j] = this_recp[j];
630 this_recp_cooked[j] = '\0';
635 if (!strcasecmp(this_recp, "sysop")) {
637 strcpy(this_recp, CtdlGetConfigStr("c_aideroom"));
638 if (!IsEmptyStr(ret->recp_room)) {
639 strcat(ret->recp_room, "|");
641 strcat(ret->recp_room, this_recp);
643 else if ( (!strncasecmp(this_recp, "room_", 5))
644 && (!CtdlGetRoom(&tempQR, &this_recp_cooked[5])) ) {
646 /* Save room so we can restore it later */
650 /* Check permissions to send mail to this room */
651 err = CtdlDoIHavePermissionToPostInThisRoom(
656 0 /* 0 = not a reply */
665 if (!IsEmptyStr(ret->recp_room)) {
666 strcat(ret->recp_room, "|");
668 strcat(ret->recp_room, &this_recp_cooked[5]);
670 if (!IsEmptyStr(ret->recp_orgroom)) {
671 strcat(ret->recp_orgroom, "|");
673 strcat(ret->recp_orgroom, org_recp);
677 /* Restore room in case something needs it */
681 else if (CtdlGetUser(&tempUS, this_recp) == 0) {
683 strcpy(this_recp, tempUS.fullname);
684 if (!IsEmptyStr(ret->recp_local)) {
685 strcat(ret->recp_local, "|");
687 strcat(ret->recp_local, this_recp);
689 else if (CtdlGetUser(&tempUS, this_recp_cooked) == 0) {
691 strcpy(this_recp, tempUS.fullname);
692 if (!IsEmptyStr(ret->recp_local)) {
693 strcat(ret->recp_local, "|");
695 strcat(ret->recp_local, this_recp);
703 /* Yes, you're reading this correctly: if the target
704 * domain points back to the local system,
705 * the address is invalid. That's
706 * because if the address were valid, we would have
707 * already translated it to a local address by now.
709 if (IsDirectory(this_recp, 0)) {
715 if (!IsEmptyStr(ret->recp_internet)) {
716 strcat(ret->recp_internet, "|");
718 strcat(ret->recp_internet, this_recp);
723 if (!IsEmptyStr(ret->recp_ignet)) {
724 strcat(ret->recp_ignet, "|");
726 strcat(ret->recp_ignet, this_recp);
734 if (IsEmptyStr(errmsg)) {
735 snprintf(append, sizeof append, "Invalid recipient: %s", this_recp);
738 snprintf(append, sizeof append, "%s", errmsg);
740 if ( (strlen(ret->errormsg) + strlen(append) + 3) < SIZ) {
741 if (!IsEmptyStr(ret->errormsg)) {
742 strcat(ret->errormsg, "; ");
744 strcat(ret->errormsg, append);
748 if (IsEmptyStr(ret->display_recp)) {
749 strcpy(append, this_recp);
752 snprintf(append, sizeof append, ", %s", this_recp);
754 if ( (strlen(ret->display_recp)+strlen(append)) < SIZ) {
755 strcat(ret->display_recp, append);
761 if ((ret->num_local + ret->num_internet + ret->num_ignet +
762 ret->num_room + ret->num_error) == 0) {
763 ret->num_error = (-1);
764 strcpy(ret->errormsg, "No recipients specified.");
767 syslog(LOG_DEBUG, "internet_addressing: validate_recipients() = %d local, %d room, %d SMTP, %d IGnet, %d error",
768 ret->num_local, ret->num_room, ret->num_internet, ret->num_ignet, ret->num_error
777 * Destructor for recptypes
779 void free_recipients(recptypes *valid) {
785 if (valid->recptypes_magic != RECPTYPES_MAGIC) {
786 syslog(LOG_ERR, "internet_addressing: attempt to call free_recipients() on some other data type!");
790 if (valid->errormsg != NULL) free(valid->errormsg);
791 if (valid->recp_local != NULL) free(valid->recp_local);
792 if (valid->recp_internet != NULL) free(valid->recp_internet);
793 if (valid->recp_ignet != NULL) free(valid->recp_ignet);
794 if (valid->recp_room != NULL) free(valid->recp_room);
795 if (valid->recp_orgroom != NULL) free(valid->recp_orgroom);
796 if (valid->display_recp != NULL) free(valid->display_recp);
797 if (valid->bounce_to != NULL) free(valid->bounce_to);
798 if (valid->envelope_from != NULL) free(valid->envelope_from);
799 if (valid->sending_room != NULL) free(valid->sending_room);
804 char *qp_encode_email_addrs(char *source)
806 char *user, *node, *name;
807 const char headerStr[] = "=?UTF-8?Q?";
811 int need_to_encode = 0;
817 long nAddrPtrMax = 50;
822 if (source == NULL) return source;
823 if (IsEmptyStr(source)) return source;
824 syslog(LOG_DEBUG, "internet_addressing: qp_encode_email_addrs <%s>", source);
826 AddrPtr = malloc (sizeof (long) * nAddrPtrMax);
827 AddrUtf8 = malloc (sizeof (long) * nAddrPtrMax);
828 memset(AddrUtf8, 0, sizeof (long) * nAddrPtrMax);
831 while (!IsEmptyStr (&source[i])) {
832 if (nColons >= nAddrPtrMax){
835 ptr = (long *) malloc(sizeof (long) * nAddrPtrMax * 2);
836 memcpy (ptr, AddrPtr, sizeof (long) * nAddrPtrMax);
837 free (AddrPtr), AddrPtr = ptr;
839 ptr = (long *) malloc(sizeof (long) * nAddrPtrMax * 2);
840 memset(&ptr[nAddrPtrMax], 0,
841 sizeof (long) * nAddrPtrMax);
843 memcpy (ptr, AddrUtf8, sizeof (long) * nAddrPtrMax);
844 free (AddrUtf8), AddrUtf8 = ptr;
847 if (((unsigned char) source[i] < 32) ||
848 ((unsigned char) source[i] > 126)) {
850 AddrUtf8[nColons] = 1;
852 if (source[i] == '"')
853 InQuotes = !InQuotes;
854 if (!InQuotes && source[i] == ',') {
855 AddrPtr[nColons] = i;
860 if (need_to_encode == 0) {
867 EncodedMaxLen = nColons * (sizeof(headerStr) + 3) + SourceLen * 3;
868 Encoded = (char*) malloc (EncodedMaxLen);
870 for (i = 0; i < nColons; i++) {
871 source[AddrPtr[i]++] = '\0';
873 /* TODO: if libidn, this might get larger*/
874 user = malloc(SourceLen + 1);
875 node = malloc(SourceLen + 1);
876 name = malloc(SourceLen + 1);
880 for (i = 0; i < nColons && nPtr != NULL; i++) {
881 nmax = EncodedMaxLen - (nPtr - Encoded);
883 process_rfc822_addr(&source[AddrPtr[i]],
887 /* TODO: libIDN here ! */
888 if (IsEmptyStr(name)) {
889 n = snprintf(nPtr, nmax,
890 (i==0)?"%s@%s" : ",%s@%s",
894 EncodedName = rfc2047encode(name, strlen(name));
895 n = snprintf(nPtr, nmax,
896 (i==0)?"%s <%s@%s>" : ",%s <%s@%s>",
897 EncodedName, user, node);
902 n = snprintf(nPtr, nmax,
904 &source[AddrPtr[i]]);
910 ptr = (char*) malloc(EncodedMaxLen * 2);
911 memcpy(ptr, Encoded, EncodedMaxLen);
912 nnPtr = ptr + (nPtr - Encoded), nPtr = nnPtr;
913 free(Encoded), Encoded = ptr;
915 i--; /* do it once more with properly lengthened buffer */
918 for (i = 0; i < nColons; i++)
919 source[--AddrPtr[i]] = ',';
931 * Unfold a multi-line field into a single line, removing multi-whitespaces
933 void unfold_rfc822_field(char **field, char **FieldEnd)
936 char *pField = *field;
938 char *pFieldEnd = *FieldEnd;
940 while (isspace(*pField))
942 /* remove leading/trailing whitespace */
945 while (isspace(*pFieldEnd))
948 *FieldEnd = pFieldEnd;
949 /* convert non-space whitespace to spaces, and remove double blanks */
950 for (sField = *field = pField;
954 if ((*sField=='\r') || (*sField=='\n'))
957 while (((*(sField + Offset) == '\r') ||
958 (*(sField + Offset) == '\n') ||
959 (isspace(*(sField + Offset)))) &&
960 (sField + Offset < pFieldEnd))
966 if (*sField=='\"') quote = 1 - quote;
968 if (isspace(*sField))
974 while ((sField < pFieldEnd) &&
979 else *pField = *sField;
981 else *pField = *sField;
985 *FieldEnd = pField - 1;
990 * Split an RFC822-style address into userid, host, and full name
993 void process_rfc822_addr(const char *rfc822, char *user, char *node, char *name)
998 strcpy(node, CtdlGetConfigStr("c_fqdn"));
1001 if (rfc822 == NULL) return;
1003 /* extract full name - first, it's From minus <userid> */
1004 strcpy(name, rfc822);
1005 stripout(name, '<', '>');
1007 /* strip anything to the left of a bang */
1008 while ((!IsEmptyStr(name)) && (haschar(name, '!') > 0))
1009 strcpy(name, &name[1]);
1011 /* and anything to the right of a @ or % */
1012 for (a = 0; name[a] != '\0'; ++a) {
1013 if (name[a] == '@') {
1017 if (name[a] == '%') {
1023 /* but if there are parentheses, that changes the rules... */
1024 if ((haschar(rfc822, '(') == 1) && (haschar(rfc822, ')') == 1)) {
1025 strcpy(name, rfc822);
1026 stripallbut(name, '(', ')');
1029 /* but if there are a set of quotes, that supersedes everything */
1030 if (haschar(rfc822, 34) == 2) {
1031 strcpy(name, rfc822);
1032 while ((!IsEmptyStr(name)) && (name[0] != 34)) {
1033 strcpy(&name[0], &name[1]);
1035 strcpy(&name[0], &name[1]);
1036 for (a = 0; name[a] != '\0'; ++a)
1037 if (name[a] == 34) {
1042 /* extract user id */
1043 strcpy(user, rfc822);
1045 /* first get rid of anything in parens */
1046 stripout(user, '(', ')');
1048 /* if there's a set of angle brackets, strip it down to that */
1049 if ((haschar(user, '<') == 1) && (haschar(user, '>') == 1)) {
1050 stripallbut(user, '<', '>');
1053 /* strip anything to the left of a bang */
1054 while ((!IsEmptyStr(user)) && (haschar(user, '!') > 0))
1055 strcpy(user, &user[1]);
1057 /* and anything to the right of a @ or % */
1058 for (a = 0; user[a] != '\0'; ++a) {
1059 if (user[a] == '@') {
1063 if (user[a] == '%') {
1070 /* extract node name */
1071 strcpy(node, rfc822);
1073 /* first get rid of anything in parens */
1074 stripout(node, '(', ')');
1076 /* if there's a set of angle brackets, strip it down to that */
1077 if ((haschar(node, '<') == 1) && (haschar(node, '>') == 1)) {
1078 stripallbut(node, '<', '>');
1081 /* If no node specified, tack ours on instead */
1083 (haschar(node, '@')==0)
1084 && (haschar(node, '%')==0)
1085 && (haschar(node, '!')==0)
1087 strcpy(node, CtdlGetConfigStr("c_nodename"));
1092 /* strip anything to the left of a @ */
1093 while ((!IsEmptyStr(node)) && (haschar(node, '@') > 0))
1094 strcpy(node, &node[1]);
1096 /* strip anything to the left of a % */
1097 while ((!IsEmptyStr(node)) && (haschar(node, '%') > 0))
1098 strcpy(node, &node[1]);
1100 /* reduce multiple system bang paths to node!user */
1101 while ((!IsEmptyStr(node)) && (haschar(node, '!') > 1))
1102 strcpy(node, &node[1]);
1104 /* now get rid of the user portion of a node!user string */
1105 for (a = 0; node[a] != '\0'; ++a)
1106 if (node[a] == '!') {
1112 /* strip leading and trailing spaces in all strings */
1117 /* If we processed a string that had the address in angle brackets
1118 * but no name outside the brackets, we now have an empty name. In
1119 * this case, use the user portion of the address as the name.
1121 if ((IsEmptyStr(name)) && (!IsEmptyStr(user))) {
1128 * convert_field() is a helper function for convert_internet_message().
1129 * Given start/end positions for an rfc822 field, it converts it to a Citadel
1130 * field if it wants to, and unfolds it if necessary.
1132 * Returns 1 if the field was converted and inserted into the Citadel message
1133 * structure, implying that the source field should be removed from the
1136 int convert_field(struct CtdlMessage *msg, const char *beg, const char *end) {
1137 char *key, *value, *valueend;
1141 const char *colonpos = NULL;
1150 for (pos = end; pos >= beg; pos--) {
1151 if (*pos == ':') colonpos = pos;
1154 if (colonpos == NULL) return(0); /* no colon? not a valid header line */
1157 key = malloc(len + 2);
1158 memcpy(key, beg, len + 1);
1160 valueend = key + len;
1161 * ( key + (colonpos - beg) ) = '\0';
1162 value = &key[(colonpos - beg) + 1];
1163 /* printf("Header: [%s]\nValue: [%s]\n", key, value); */
1164 unfold_rfc822_field(&value, &valueend);
1165 valuelen = valueend - value + 1;
1166 /* printf("UnfoldedValue: [%s]\n", value); */
1169 * Here's the big rfc822-to-citadel loop.
1172 /* Date/time is converted into a unix timestamp. If the conversion
1173 * fails, we replace it with the time the message arrived locally.
1175 if (!strcasecmp(key, "Date")) {
1176 parsed_date = parsedate(value);
1177 if (parsed_date < 0L) parsed_date = time(NULL);
1179 if (CM_IsEmpty(msg, eTimestamp))
1180 CM_SetFieldLONG(msg, eTimestamp, parsed_date);
1184 else if (!strcasecmp(key, "From")) {
1185 process_rfc822_addr(value, user, node, name);
1186 syslog(LOG_DEBUG, "internet_addressing: converted to <%s@%s> (%s)", user, node, name);
1187 snprintf(addr, sizeof(addr), "%s@%s", user, node);
1188 if (CM_IsEmpty(msg, eAuthor) && !IsEmptyStr(name))
1189 CM_SetField(msg, eAuthor, name, strlen(name));
1190 if (CM_IsEmpty(msg, erFc822Addr) && !IsEmptyStr(addr))
1191 CM_SetField(msg, erFc822Addr, addr, strlen(addr));
1195 else if (!strcasecmp(key, "Subject")) {
1196 if (CM_IsEmpty(msg, eMsgSubject))
1197 CM_SetField(msg, eMsgSubject, value, valuelen);
1201 else if (!strcasecmp(key, "List-ID")) {
1202 if (CM_IsEmpty(msg, eListID))
1203 CM_SetField(msg, eListID, value, valuelen);
1207 else if (!strcasecmp(key, "To")) {
1208 if (CM_IsEmpty(msg, eRecipient))
1209 CM_SetField(msg, eRecipient, value, valuelen);
1213 else if (!strcasecmp(key, "CC")) {
1214 if (CM_IsEmpty(msg, eCarbonCopY))
1215 CM_SetField(msg, eCarbonCopY, value, valuelen);
1219 else if (!strcasecmp(key, "Message-ID")) {
1220 if (!CM_IsEmpty(msg, emessageId)) {
1221 syslog(LOG_WARNING, "internet_addressing: duplicate message id");
1228 pValueLen = valuelen;
1229 /* Strip angle brackets */
1230 while (haschar(pValue, '<') > 0) {
1235 for (i = 0; i <= pValueLen; ++i)
1236 if (pValue[i] == '>') {
1241 CM_SetField(msg, emessageId, pValue, pValueLen);
1247 else if (!strcasecmp(key, "Return-Path")) {
1248 if (CM_IsEmpty(msg, eMessagePath))
1249 CM_SetField(msg, eMessagePath, value, valuelen);
1253 else if (!strcasecmp(key, "Envelope-To")) {
1254 if (CM_IsEmpty(msg, eenVelopeTo))
1255 CM_SetField(msg, eenVelopeTo, value, valuelen);
1259 else if (!strcasecmp(key, "References")) {
1260 CM_SetField(msg, eWeferences, value, valuelen);
1264 else if (!strcasecmp(key, "Reply-To")) {
1265 CM_SetField(msg, eReplyTo, value, valuelen);
1269 else if (!strcasecmp(key, "In-reply-to")) {
1270 if (CM_IsEmpty(msg, eWeferences)) /* References: supersedes In-reply-to: */
1271 CM_SetField(msg, eWeferences, value, valuelen);
1277 /* Clean up and move on. */
1278 free(key); /* Don't free 'value', it's actually the same buffer */
1284 * Convert RFC822 references format (References) to Citadel references format (Weferences)
1286 void convert_references_to_wefewences(char *str) {
1287 int bracket_nesting = 0;
1289 char *moveptr = NULL;
1296 if (bracket_nesting < 0) bracket_nesting = 0;
1298 if ((ch == '>') && (bracket_nesting == 0) && (*(ptr+1)) && (ptr>str) ) {
1302 else if (bracket_nesting > 0) {
1308 *moveptr = *(moveptr+1);
1312 if (ch == '<') ++bracket_nesting;
1319 * Convert an RFC822 message (headers + body) to a CtdlMessage structure.
1320 * NOTE: the supplied buffer becomes part of the CtdlMessage structure, and
1321 * will be deallocated when CM_Free() is called. Therefore, the
1322 * supplied buffer should be DEREFERENCED. It should not be freed or used
1325 struct CtdlMessage *convert_internet_message(char *rfc822) {
1326 StrBuf *RFCBuf = NewStrBufPlain(rfc822, -1);
1328 return convert_internet_message_buf(&RFCBuf);
1332 struct CtdlMessage *convert_internet_message_buf(StrBuf **rfc822)
1334 struct CtdlMessage *msg;
1335 const char *pos, *beg, *end, *totalend;
1336 int done, alldone = 0;
1338 StrBuf *OtherHeaders;
1340 msg = malloc(sizeof(struct CtdlMessage));
1341 if (msg == NULL) return msg;
1343 memset(msg, 0, sizeof(struct CtdlMessage));
1344 msg->cm_magic = CTDLMESSAGE_MAGIC; /* self check */
1345 msg->cm_anon_type = 0; /* never anonymous */
1346 msg->cm_format_type = FMT_RFC822; /* internet message */
1348 pos = ChrPtr(*rfc822);
1349 totalend = pos + StrLength(*rfc822);
1351 OtherHeaders = NewStrBufPlain(NULL, StrLength(*rfc822));
1355 /* Locate beginning and end of field, keeping in mind that
1356 * some fields might be multiline
1360 while ((end < totalend) &&
1365 if ( (*pos=='\n') && ((*(pos+1))!=0x20) && ((*(pos+1))!=0x09) )
1370 /* done with headers? */
1372 ( (*(pos+1)=='\n') ||
1378 if (pos >= (totalend - 1) )
1388 /* At this point we have a field. Are we interested in it? */
1389 converted = convert_field(msg, beg, end);
1391 /* Strip the field out of the RFC822 header if we used it */
1393 StrBufAppendBufPlain(OtherHeaders, beg, end - beg, 0);
1394 StrBufAppendBufPlain(OtherHeaders, HKEY("\n"), 0);
1397 /* If we've hit the end of the message, bail out */
1398 if (pos >= totalend)
1401 StrBufAppendBufPlain(OtherHeaders, HKEY("\n"), 0);
1403 StrBufAppendBufPlain(OtherHeaders, pos, totalend - pos, 0);
1405 CM_SetAsFieldSB(msg, eMesageText, &OtherHeaders);
1407 /* Follow-up sanity checks... */
1409 /* If there's no timestamp on this message, set it to now. */
1410 if (CM_IsEmpty(msg, eTimestamp)) {
1411 CM_SetFieldLONG(msg, eTimestamp, time(NULL));
1414 /* If a W (references, or rather, Wefewences) field is present, we
1415 * have to convert it from RFC822 format to Citadel format.
1417 if (!CM_IsEmpty(msg, eWeferences)) {
1419 convert_references_to_wefewences(msg->cm_fields[eWeferences]);
1427 * Look for a particular header field in an RFC822 message text. If the
1428 * requested field is found, it is unfolded (if necessary) and returned to
1429 * the caller. The field name is stripped out, leaving only its contents.
1430 * The caller is responsible for freeing the returned buffer. If the requested
1431 * field is not present, or anything else goes wrong, it returns NULL.
1433 char *rfc822_fetch_field(const char *rfc822, const char *fieldname) {
1434 char *fieldbuf = NULL;
1435 const char *end_of_headers;
1436 const char *field_start;
1441 /* Should never happen, but sometimes we get stupid */
1442 if (rfc822 == NULL) return(NULL);
1443 if (fieldname == NULL) return(NULL);
1445 snprintf(fieldhdr, sizeof fieldhdr, "%s:", fieldname);
1447 /* Locate the end of the headers, so we don't run past that point */
1448 end_of_headers = cbmstrcasestr(rfc822, "\n\r\n");
1449 if (end_of_headers == NULL) {
1450 end_of_headers = cbmstrcasestr(rfc822, "\n\n");
1452 if (end_of_headers == NULL) return (NULL);
1454 field_start = cbmstrcasestr(rfc822, fieldhdr);
1455 if (field_start == NULL) return(NULL);
1456 if (field_start > end_of_headers) return(NULL);
1458 fieldbuf = malloc(SIZ);
1459 strcpy(fieldbuf, "");
1462 ptr = cmemreadline(ptr, fieldbuf, SIZ-strlen(fieldbuf) );
1463 while ( (isspace(ptr[0])) && (ptr < end_of_headers) ) {
1464 strcat(fieldbuf, " ");
1465 cont = &fieldbuf[strlen(fieldbuf)];
1466 ptr = cmemreadline(ptr, cont, SIZ-strlen(fieldbuf) );
1470 strcpy(fieldbuf, &fieldbuf[strlen(fieldhdr)]);
1477 /*****************************************************************************
1478 * DIRECTORY MANAGEMENT FUNCTIONS *
1479 *****************************************************************************/
1482 * Generate the index key for an Internet e-mail address to be looked up
1485 void directory_key(char *key, char *addr) {
1489 for (i=0; !IsEmptyStr(&addr[i]); ++i) {
1490 if (!isspace(addr[i])) {
1491 key[keylen++] = tolower(addr[i]);
1496 syslog(LOG_DEBUG, "internet_addressing: directory key is <%s>", key);
1500 /* Return nonzero if the supplied address is in one of "our" domains
1502 int IsDirectory(char *addr, int allow_masq_domains) {
1506 extract_token(domain, addr, 1, '@', sizeof domain);
1509 h = CtdlHostAlias(domain);
1511 if ( (h == hostalias_masq) && allow_masq_domains)
1514 if (h == hostalias_localhost) {
1524 * Add an Internet e-mail address to the directory for a user
1526 int CtdlDirectoryAddUser(char *internet_addr, char *citadel_addr) {
1529 if (IsDirectory(internet_addr, 0) == 0) {
1532 syslog(LOG_DEBUG, "internet_addressing: create directory entry: %s --> %s", internet_addr, citadel_addr);
1533 directory_key(key, internet_addr);
1534 cdb_store(CDB_DIRECTORY, key, strlen(key), citadel_addr, strlen(citadel_addr)+1 );
1540 * Delete an Internet e-mail address from the directory.
1542 * (NOTE: we don't actually use or need the citadel_addr variable; it's merely
1543 * here because the callback API expects to be able to send it.)
1545 int CtdlDirectoryDelUser(char *internet_addr, char *citadel_addr) {
1548 syslog(LOG_DEBUG, "internet_addressing: delete directory entry: %s --> %s", internet_addr, citadel_addr);
1549 directory_key(key, internet_addr);
1550 return cdb_delete(CDB_DIRECTORY, key, strlen(key) ) == 0;
1555 * Look up an Internet e-mail address in the directory.
1556 * On success: returns 0, and Citadel address stored in 'target'
1557 * On failure: returns nonzero
1559 int CtdlDirectoryLookup(char *target, char *internet_addr, size_t targbuflen) {
1560 struct cdbdata *cdbrec;
1563 /* Dump it in there unchanged, just for kicks */
1564 safestrncpy(target, internet_addr, targbuflen);
1566 /* Only do lookups for addresses with hostnames in them */
1567 if (num_tokens(internet_addr, '@') != 2) return(-1);
1569 /* Only do lookups for domains in the directory */
1570 if (IsDirectory(internet_addr, 0) == 0) return(-1);
1572 directory_key(key, internet_addr);
1573 cdbrec = cdb_fetch(CDB_DIRECTORY, key, strlen(key) );
1574 if (cdbrec != NULL) {
1575 safestrncpy(target, cdbrec->ptr, targbuflen);
1585 * Harvest any email addresses that someone might want to have in their
1586 * "collected addresses" book.
1588 char *harvest_collected_addresses(struct CtdlMessage *msg) {
1591 char user[256], node[256], name[256];
1594 eMsgField field = 0;
1596 if (msg == NULL) return(NULL);
1600 if (!CM_IsEmpty(msg, eAuthor)) {
1601 strcat(addr, msg->cm_fields[eAuthor]);
1603 if (!CM_IsEmpty(msg, erFc822Addr)) {
1605 strcat(addr, msg->cm_fields[erFc822Addr]);
1607 if (IsDirectory(msg->cm_fields[erFc822Addr], 0)) {
1612 if (is_harvestable) {
1613 coll = strdup(addr);
1619 if (coll == NULL) return(NULL);
1621 /* Scan both the R (To) and Y (CC) fields */
1622 for (i = 0; i < 2; ++i) {
1623 if (i == 0) field = eRecipient;
1624 if (i == 1) field = eCarbonCopY;
1626 if (!CM_IsEmpty(msg, field)) {
1627 for (j=0; j<num_tokens(msg->cm_fields[field], ','); ++j) {
1628 extract_token(addr, msg->cm_fields[field], j, ',', sizeof addr);
1629 if (strstr(addr, "=?") != NULL)
1630 utf8ify_rfc822_string(addr);
1631 process_rfc822_addr(addr, user, node, name);
1632 h = CtdlHostAlias(node);
1633 if (h != hostalias_localhost) {
1634 coll = realloc(coll, strlen(coll) + strlen(addr) + 4);
1635 if (coll == NULL) return(NULL);
1636 if (!IsEmptyStr(coll)) {
1646 if (IsEmptyStr(coll)) {
1655 * Helper function for CtdlRebuildDirectoryIndex()
1657 * Call this function as a ForEachUser backend in order to queue up
1658 * user names, or call it with a null user to make it do the processing.
1659 * This allows us to maintain the list as a static instead of passing
1662 void CtdlRebuildDirectoryIndex_backend(struct ctdluser *usbuf, void *data) {
1669 static struct crdib *e = NULL;
1670 static int num_e = 0;
1671 static int alloc_e = 0;
1673 /* this is the calling mode where we add a user */
1675 if (usbuf != NULL) {
1676 if (num_e >= alloc_e) {
1679 e = malloc(sizeof(struct crdib) * alloc_e);
1683 e = realloc(e, (sizeof(struct crdib) * alloc_e));
1686 strcpy(e[num_e].name, usbuf->fullname);
1687 strcpy(e[num_e].emails, usbuf->emailaddrs);
1692 /* this is the calling mode where we do the processing */
1695 for (i=0; i<num_e; ++i) {
1696 if ( (!IsEmptyStr(e[i].name)) && (!IsEmptyStr(e[i].emails)) ) {
1697 for (j=0; j<num_tokens(e[i].emails, '|'); ++j) {
1698 char one_email[512];
1699 extract_token(one_email, e[i].emails, j, '|', sizeof one_email);
1700 CtdlDirectoryAddUser(one_email, e[i].name);
1712 * Initialize the directory database (erasing anything already there)
1714 void CtdlRebuildDirectoryIndex(void) {
1715 syslog(LOG_INFO, "internet_addressing: rebuilding email address directory index");
1716 cdb_trunc(CDB_DIRECTORY);
1717 ForEachUser(CtdlRebuildDirectoryIndex_backend, NULL);
1718 CtdlRebuildDirectoryIndex_backend(NULL, NULL);
1723 * Configure Internet email addresses for a user account, updating the Directory Index in the process
1725 void CtdlSetEmailAddressesForUser(char *requested_user, char *new_emailaddrs)
1727 struct ctdluser usbuf;
1731 if (CtdlGetUserLock(&usbuf, requested_user) != 0) { // We are relying on the fact that the DirectoryIndex functions don't lock.
1732 return; // Silently fail here if we can't acquire a lock on the user record.
1735 syslog(LOG_DEBUG, "internet_addressing: setting email addresses for <%s> to <%s>", usbuf.fullname, new_emailaddrs);
1737 /* Delete all of the existing directory index records for the user (easier this way) */
1738 for (i=0; i<num_tokens(usbuf.emailaddrs, '|'); ++i) {
1739 extract_token(buf, usbuf.emailaddrs, i, '|', sizeof buf);
1740 CtdlDirectoryDelUser(buf, requested_user);
1743 strcpy(usbuf.emailaddrs, new_emailaddrs); // make it official.
1745 /* Index all of the new email addresses (they've already been sanitized) */
1746 for (i=0; i<num_tokens(usbuf.emailaddrs, '|'); ++i) {
1747 extract_token(buf, usbuf.emailaddrs, i, '|', sizeof buf);
1748 CtdlDirectoryAddUser(buf, requested_user);
1751 CtdlPutUserLock(&usbuf);