2 * This file contains functions which handle the mapping of Internet addresses
3 * to users on the Citadel system.
15 #include <sys/types.h>
17 #if TIME_WITH_SYS_TIME
18 # include <sys/time.h>
22 # include <sys/time.h>
31 #include <libcitadel.h>
34 #include "sysdep_decls.h"
35 #include "citserver.h"
39 #include "internet_addressing.h"
42 #include "parsedate.h"
45 #include "ctdl_module.h"
56 /* This is the non-define version in case of s.b. needing to debug */
57 inline void FindNextEnd (char *bptr, char *end)
59 /* Find the next ?Q? */
60 end = strchr(bptr + 2, '?');
61 if (end == NULL) return NULL;
62 if (((*(end + 1) == 'B') || (*(end + 1) == 'Q')) &&
63 (*(end + 2) == '?')) {
64 /* skip on to the end of the cluster, the next ?= */
65 end = strstr(end + 3, "?=");
68 /* sort of half valid encoding, try to find an end. */
69 end = strstr(bptr, "?=");
73 #define FindNextEnd(bptr, end) { \
74 end = strchr(bptr + 2, '?'); \
76 if (((*(end + 1) == 'B') || (*(end + 1) == 'Q')) && (*(end + 2) == '?')) { \
77 end = strstr(end + 3, "?="); \
78 } else end = strstr(bptr, "?="); \
83 * Handle subjects with RFC2047 encoding such as:
84 * =?koi8-r?B?78bP0s3Mxc7JxSDXz9rE1dvO2c3JINvB0sHNySDP?=
86 void utf8ify_rfc822_string(char *buf) {
87 char *start, *end, *next, *nextend, *ptr;
92 iconv_t ic = (iconv_t)(-1) ;
93 char *ibuf; /**< Buffer of characters to be converted */
94 char *obuf; /**< Buffer for converted characters */
95 size_t ibuflen; /**< Length of input buffer */
96 size_t obuflen; /**< Length of output buffer */
97 char *isav; /**< Saved pointer to input buffer */
98 char *osav; /**< Saved pointer to output buffer */
101 int illegal_non_rfc2047_encoding = 0;
103 /* Sometimes, badly formed messages contain strings which were simply
104 * written out directly in some foreign character set instead of
105 * using RFC2047 encoding. This is illegal but we will attempt to
106 * handle it anyway by converting from a user-specified default
107 * charset to UTF-8 if we see any nonprintable characters.
110 for (i=0; i<len; ++i) {
111 if ((buf[i] < 32) || (buf[i] > 126)) {
112 illegal_non_rfc2047_encoding = 1;
113 i = len; ///< take a shortcut, it won't be more than one.
116 if (illegal_non_rfc2047_encoding) {
117 const char *default_header_charset = "iso-8859-1";
118 if ( (strcasecmp(default_header_charset, "UTF-8")) && (strcasecmp(default_header_charset, "us-ascii")) ) {
119 ctdl_iconv_open("UTF-8", default_header_charset, &ic);
120 if (ic != (iconv_t)(-1) ) {
123 safestrncpy(ibuf, buf, 1024);
124 ibuflen = strlen(ibuf);
126 obuf = (char *) malloc(obuflen);
128 iconv(ic, &ibuf, &ibuflen, &obuf, &obuflen);
129 osav[1024-obuflen] = 0;
138 /* pre evaluate the first pair */
139 nextend = end = NULL;
141 start = strstr(buf, "=?");
143 FindNextEnd (start, end);
145 while ((start != NULL) && (end != NULL))
147 next = strstr(end, "=?");
149 FindNextEnd(next, nextend);
153 /* did we find two partitions */
154 if ((next != NULL) &&
158 while ((ptr < next) &&
164 /* did we find a gab just filled with blanks? */
169 len - (next - start));
171 /* now terminate the gab at the end */
172 delta = (next - end) - 2;
176 /* move next to its new location. */
181 /* our next-pair is our new first pair now. */
186 /* Now we handle foreign character sets properly encoded
189 start = strstr(buf, "=?");
190 FindNextEnd((start != NULL)? start : buf, end);
191 while (start != NULL && end != NULL && end > start)
193 extract_token(charset, start, 1, '?', sizeof charset);
194 extract_token(encoding, start, 2, '?', sizeof encoding);
195 extract_token(istr, start, 3, '?', sizeof istr);
199 if (!strcasecmp(encoding, "B")) { /**< base64 */
200 ibuflen = CtdlDecodeBase64(ibuf, istr, strlen(istr));
202 else if (!strcasecmp(encoding, "Q")) { /**< quoted-printable */
210 if (istr[pos] == '_') istr[pos] = ' ';
214 ibuflen = CtdlDecodeQuotedPrintable(ibuf, istr, len);
217 strcpy(ibuf, istr); /**< unknown encoding */
218 ibuflen = strlen(istr);
221 ctdl_iconv_open("UTF-8", charset, &ic);
222 if (ic != (iconv_t)(-1) ) {
224 obuf = (char *) malloc(obuflen);
226 iconv(ic, &ibuf, &ibuflen, &obuf, &obuflen);
227 osav[1024-obuflen] = 0;
232 remove_token(end, 0, '?');
233 remove_token(end, 0, '?');
234 remove_token(end, 0, '?');
235 remove_token(end, 0, '?');
236 strcpy(end, &end[1]);
238 snprintf(newbuf, sizeof newbuf, "%s%s%s", buf, osav, end);
247 remove_token(end, 0, '?');
248 remove_token(end, 0, '?');
249 remove_token(end, 0, '?');
250 remove_token(end, 0, '?');
251 strcpy(end, &end[1]);
253 snprintf(newbuf, sizeof newbuf, "%s(unreadable)%s", buf, end);
260 * Since spammers will go to all sorts of absurd lengths to get their
261 * messages through, there are LOTS of corrupt headers out there.
262 * So, prevent a really badly formed RFC2047 header from throwing
263 * this function into an infinite loop.
266 if (passes > 20) return;
268 start = strstr(buf, "=?");
269 FindNextEnd((start != NULL)? start : buf, end);
274 inline void utf8ify_rfc822_string(char *a){};
285 char *inetcfg = NULL;
286 struct spamstrings_t *spamstrings = NULL;
290 * Return nonzero if the supplied name is an alias for this host.
292 int CtdlHostAlias(char *fqdn) {
296 char host[256], type[256];
299 if (fqdn == NULL) return(hostalias_nomatch);
300 if (IsEmptyStr(fqdn)) return(hostalias_nomatch);
301 if (!strcasecmp(fqdn, "localhost")) return(hostalias_localhost);
302 if (!strcasecmp(fqdn, config.c_fqdn)) return(hostalias_localhost);
303 if (!strcasecmp(fqdn, config.c_nodename)) return(hostalias_localhost);
304 if (inetcfg == NULL) return(hostalias_nomatch);
306 config_lines = num_tokens(inetcfg, '\n');
307 for (i=0; i<config_lines; ++i) {
308 extract_token(buf, inetcfg, i, '\n', sizeof buf);
309 extract_token(host, buf, 0, '|', sizeof host);
310 extract_token(type, buf, 1, '|', sizeof type);
314 /* Process these in a specific order, in case there are multiple matches.
315 * We want directory to override masq, for example.
318 if ( (!strcasecmp(type, "masqdomain")) && (!strcasecmp(fqdn, host))) {
319 found = hostalias_masq;
321 if ( (!strcasecmp(type, "localhost")) && (!strcasecmp(fqdn, host))) {
322 found = hostalias_localhost;
324 if ( (!strcasecmp(type, "directory")) && (!strcasecmp(fqdn, host))) {
325 found = hostalias_directory;
328 if (found) return(found);
331 return(hostalias_nomatch);
341 * Return 0 if a given string fuzzy-matches a Citadel user account
343 * FIXME ... this needs to be updated to handle aliases.
345 int fuzzy_match(struct ctdluser *us, char *matchstring) {
349 if ( (!strncasecmp(matchstring, "cit", 3))
350 && (atol(&matchstring[3]) == us->usernum)) {
354 len = strlen(matchstring);
355 for (a=0; !IsEmptyStr(&us->fullname[a]); ++a) {
356 if (!strncasecmp(&us->fullname[a],
366 * Unfold a multi-line field into a single line, removing multi-whitespaces
368 void unfold_rfc822_field(char **field, char **FieldEnd)
371 char *pField = *field;
373 char *pFieldEnd = *FieldEnd;
375 while (isspace(*pField))
377 /* remove leading/trailing whitespace */
380 while (isspace(*pFieldEnd))
383 *FieldEnd = pFieldEnd;
384 /* convert non-space whitespace to spaces, and remove double blanks */
385 for (sField = *field = pField;
389 if ((*sField=='\r') || (*sField=='\n')) {
390 while (isspace(*sField))
395 if (*sField=='\"') quote = 1 - quote;
397 if (isspace(*sField))
403 while ((sField < pFieldEnd) &&
408 else *pField = *sField;
410 else *pField = *sField;
414 *FieldEnd = pField - 1;
420 * Split an RFC822-style address into userid, host, and full name
423 void process_rfc822_addr(const char *rfc822, char *user, char *node, char *name)
428 strcpy(node, config.c_fqdn);
431 if (rfc822 == NULL) return;
433 /* extract full name - first, it's From minus <userid> */
434 strcpy(name, rfc822);
435 stripout(name, '<', '>');
437 /* strip anything to the left of a bang */
438 while ((!IsEmptyStr(name)) && (haschar(name, '!') > 0))
439 strcpy(name, &name[1]);
441 /* and anything to the right of a @ or % */
442 for (a = 0; a < strlen(name); ++a) {
449 /* but if there are parentheses, that changes the rules... */
450 if ((haschar(rfc822, '(') == 1) && (haschar(rfc822, ')') == 1)) {
451 strcpy(name, rfc822);
452 stripallbut(name, '(', ')');
455 /* but if there are a set of quotes, that supersedes everything */
456 if (haschar(rfc822, 34) == 2) {
457 strcpy(name, rfc822);
458 while ((!IsEmptyStr(name)) && (name[0] != 34)) {
459 strcpy(&name[0], &name[1]);
461 strcpy(&name[0], &name[1]);
462 for (a = 0; a < strlen(name); ++a)
466 /* extract user id */
467 strcpy(user, rfc822);
469 /* first get rid of anything in parens */
470 stripout(user, '(', ')');
472 /* if there's a set of angle brackets, strip it down to that */
473 if ((haschar(user, '<') == 1) && (haschar(user, '>') == 1)) {
474 stripallbut(user, '<', '>');
477 /* strip anything to the left of a bang */
478 while ((!IsEmptyStr(user)) && (haschar(user, '!') > 0))
479 strcpy(user, &user[1]);
481 /* and anything to the right of a @ or % */
482 for (a = 0; a < strlen(user); ++a) {
490 /* extract node name */
491 strcpy(node, rfc822);
493 /* first get rid of anything in parens */
494 stripout(node, '(', ')');
496 /* if there's a set of angle brackets, strip it down to that */
497 if ((haschar(node, '<') == 1) && (haschar(node, '>') == 1)) {
498 stripallbut(node, '<', '>');
501 /* If no node specified, tack ours on instead */
503 (haschar(node, '@')==0)
504 && (haschar(node, '%')==0)
505 && (haschar(node, '!')==0)
507 strcpy(node, config.c_nodename);
512 /* strip anything to the left of a @ */
513 while ((!IsEmptyStr(node)) && (haschar(node, '@') > 0))
514 strcpy(node, &node[1]);
516 /* strip anything to the left of a % */
517 while ((!IsEmptyStr(node)) && (haschar(node, '%') > 0))
518 strcpy(node, &node[1]);
520 /* reduce multiple system bang paths to node!user */
521 while ((!IsEmptyStr(node)) && (haschar(node, '!') > 1))
522 strcpy(node, &node[1]);
524 /* now get rid of the user portion of a node!user string */
525 for (a = 0; a < strlen(node); ++a)
530 /* strip leading and trailing spaces in all strings */
535 /* If we processed a string that had the address in angle brackets
536 * but no name outside the brackets, we now have an empty name. In
537 * this case, use the user portion of the address as the name.
539 if ((IsEmptyStr(name)) && (!IsEmptyStr(user))) {
547 * convert_field() is a helper function for convert_internet_message().
548 * Given start/end positions for an rfc822 field, it converts it to a Citadel
549 * field if it wants to, and unfolds it if necessary.
551 * Returns 1 if the field was converted and inserted into the Citadel message
552 * structure, implying that the source field should be removed from the
555 int convert_field(struct CtdlMessage *msg, const char *beg, const char *end) {
556 char *key, *value, *valueend;
560 const char *colonpos = NULL;
570 for (pos = end; pos >= beg; pos--) {
571 if (*pos == ':') colonpos = pos;
574 if (colonpos == NULL) return(0); /* no colon? not a valid header line */
577 key = malloc(len + 2);
578 memcpy(key, beg, len + 1);
580 valueend = key + len;
581 * ( key + (colonpos - beg) ) = '\0';
582 value = &key[(colonpos - beg) + 1];
583 /* printf("Header: [%s]\nValue: [%s]\n", key, value); */
584 unfold_rfc822_field(&value, &valueend);
585 valuelen = valueend - value + 1;
586 /* printf("UnfoldedValue: [%s]\n", value); */
589 * Here's the big rfc822-to-citadel loop.
592 /* Date/time is converted into a unix timestamp. If the conversion
593 * fails, we replace it with the time the message arrived locally.
595 if (!strcasecmp(key, "Date")) {
596 parsed_date = parsedate(value);
597 if (parsed_date < 0L) parsed_date = time(NULL);
598 snprintf(buf, sizeof buf, "%ld", (long)parsed_date );
599 if (msg->cm_fields['T'] == NULL)
600 msg->cm_fields['T'] = strdup(buf);
604 else if (!strcasecmp(key, "From")) {
605 process_rfc822_addr(value, user, node, name);
606 syslog(LOG_DEBUG, "Converted to <%s@%s> (%s)\n", user, node, name);
607 snprintf(addr, sizeof addr, "%s@%s", user, node);
608 if (msg->cm_fields['A'] == NULL)
609 msg->cm_fields['A'] = strdup(name);
611 if (msg->cm_fields['F'] == NULL)
612 msg->cm_fields['F'] = strdup(addr);
616 else if (!strcasecmp(key, "Subject")) {
617 if (msg->cm_fields['U'] == NULL)
618 msg->cm_fields['U'] = strndup(value, valuelen);
622 else if (!strcasecmp(key, "List-ID")) {
623 if (msg->cm_fields['L'] == NULL)
624 msg->cm_fields['L'] = strndup(value, valuelen);
628 else if (!strcasecmp(key, "To")) {
629 if (msg->cm_fields['R'] == NULL)
630 msg->cm_fields['R'] = strndup(value, valuelen);
634 else if (!strcasecmp(key, "CC")) {
635 if (msg->cm_fields['Y'] == NULL)
636 msg->cm_fields['Y'] = strndup(value, valuelen);
640 else if (!strcasecmp(key, "Message-ID")) {
641 if (msg->cm_fields['I'] != NULL) {
642 syslog(LOG_WARNING, "duplicate message id\n");
645 if (msg->cm_fields['I'] == NULL) {
646 msg->cm_fields['I'] = strndup(value, valuelen);
648 /* Strip angle brackets */
649 while (haschar(msg->cm_fields['I'], '<') > 0) {
650 strcpy(&msg->cm_fields['I'][0],
651 &msg->cm_fields['I'][1]);
653 for (i = 0; i<strlen(msg->cm_fields['I']); ++i)
654 if (msg->cm_fields['I'][i] == '>')
655 msg->cm_fields['I'][i] = 0;
661 else if (!strcasecmp(key, "Return-Path")) {
662 if (msg->cm_fields['P'] == NULL)
663 msg->cm_fields['P'] = strndup(value, valuelen);
667 else if (!strcasecmp(key, "Envelope-To")) {
668 if (msg->cm_fields['V'] == NULL)
669 msg->cm_fields['V'] = strndup(value, valuelen);
673 else if (!strcasecmp(key, "References")) {
674 if (msg->cm_fields['W'] != NULL) {
675 free(msg->cm_fields['W']);
677 msg->cm_fields['W'] = strndup(value, valuelen);
681 else if (!strcasecmp(key, "In-reply-to")) {
682 if (msg->cm_fields['W'] == NULL) { /* References: supersedes In-reply-to: */
683 msg->cm_fields['W'] = strndup(value, valuelen);
690 /* Clean up and move on. */
691 free(key); /* Don't free 'value', it's actually the same buffer */
697 * Convert RFC822 references format (References) to Citadel references format (Weferences)
699 void convert_references_to_wefewences(char *str) {
700 int bracket_nesting = 0;
702 char *moveptr = NULL;
709 if (bracket_nesting < 0) bracket_nesting = 0;
711 if ((ch == '>') && (bracket_nesting == 0) && (*(ptr+1)) && (ptr>str) ) {
715 else if (bracket_nesting > 0) {
721 *moveptr = *(moveptr+1);
725 if (ch == '<') ++bracket_nesting;
732 * Convert an RFC822 message (headers + body) to a CtdlMessage structure.
733 * NOTE: the supplied buffer becomes part of the CtdlMessage structure, and
734 * will be deallocated when CtdlFreeMessage() is called. Therefore, the
735 * supplied buffer should be DEREFERENCED. It should not be freed or used
738 struct CtdlMessage *convert_internet_message(char *rfc822) {
739 StrBuf *RFCBuf = NewStrBufPlain(rfc822, -1);
741 return convert_internet_message_buf(&RFCBuf);
746 struct CtdlMessage *convert_internet_message_buf(StrBuf **rfc822)
748 struct CtdlMessage *msg;
749 const char *pos, *beg, *end, *totalend;
750 int done, alldone = 0;
753 StrBuf *OtherHeaders;
755 msg = malloc(sizeof(struct CtdlMessage));
756 if (msg == NULL) return msg;
758 memset(msg, 0, sizeof(struct CtdlMessage));
759 msg->cm_magic = CTDLMESSAGE_MAGIC; /* self check */
760 msg->cm_anon_type = 0; /* never anonymous */
761 msg->cm_format_type = FMT_RFC822; /* internet message */
763 pos = ChrPtr(*rfc822);
764 totalend = pos + StrLength(*rfc822);
766 OtherHeaders = NewStrBufPlain(NULL, StrLength(*rfc822));
770 /* Locate beginning and end of field, keeping in mind that
771 * some fields might be multiline
775 while ((end < totalend) &&
780 if ( (*pos=='\n') && ((*(pos+1))!=0x20) && ((*(pos+1))!=0x09) )
785 /* done with headers? */
787 ( (*(pos+1)=='\n') ||
793 if (pos >= (totalend - 1) )
803 /* At this point we have a field. Are we interested in it? */
804 converted = convert_field(msg, beg, end);
806 /* Strip the field out of the RFC822 header if we used it */
808 StrBufAppendBufPlain(OtherHeaders, beg, end - beg, 0);
809 StrBufAppendBufPlain(OtherHeaders, HKEY("\n"), 0);
812 /* If we've hit the end of the message, bail out */
816 StrBufAppendBufPlain(OtherHeaders, HKEY("\n"), 0);
818 StrBufAppendBufPlain(OtherHeaders, pos, totalend - pos, 0);
820 msg->cm_fields['M'] = SmashStrBuf(&OtherHeaders);
822 /* Follow-up sanity checks... */
824 /* If there's no timestamp on this message, set it to now. */
825 if (msg->cm_fields['T'] == NULL) {
826 snprintf(buf, sizeof buf, "%ld", (long)time(NULL));
827 msg->cm_fields['T'] = strdup(buf);
830 /* If a W (references, or rather, Wefewences) field is present, we
831 * have to convert it from RFC822 format to Citadel format.
833 if (msg->cm_fields['W'] != NULL) {
834 convert_references_to_wefewences(msg->cm_fields['W']);
843 * Look for a particular header field in an RFC822 message text. If the
844 * requested field is found, it is unfolded (if necessary) and returned to
845 * the caller. The field name is stripped out, leaving only its contents.
846 * The caller is responsible for freeing the returned buffer. If the requested
847 * field is not present, or anything else goes wrong, it returns NULL.
849 char *rfc822_fetch_field(const char *rfc822, const char *fieldname) {
850 char *fieldbuf = NULL;
851 const char *end_of_headers;
852 const char *field_start;
857 /* Should never happen, but sometimes we get stupid */
858 if (rfc822 == NULL) return(NULL);
859 if (fieldname == NULL) return(NULL);
861 snprintf(fieldhdr, sizeof fieldhdr, "%s:", fieldname);
863 /* Locate the end of the headers, so we don't run past that point */
864 end_of_headers = cbmstrcasestr(rfc822, "\n\r\n");
865 if (end_of_headers == NULL) {
866 end_of_headers = cbmstrcasestr(rfc822, "\n\n");
868 if (end_of_headers == NULL) return (NULL);
870 field_start = cbmstrcasestr(rfc822, fieldhdr);
871 if (field_start == NULL) return(NULL);
872 if (field_start > end_of_headers) return(NULL);
874 fieldbuf = malloc(SIZ);
875 strcpy(fieldbuf, "");
878 ptr = cmemreadline(ptr, fieldbuf, SIZ-strlen(fieldbuf) );
879 while ( (isspace(ptr[0])) && (ptr < end_of_headers) ) {
880 strcat(fieldbuf, " ");
881 cont = &fieldbuf[strlen(fieldbuf)];
882 ptr = cmemreadline(ptr, cont, SIZ-strlen(fieldbuf) );
886 strcpy(fieldbuf, &fieldbuf[strlen(fieldhdr)]);
894 /*****************************************************************************
895 * DIRECTORY MANAGEMENT FUNCTIONS *
896 *****************************************************************************/
899 * Generate the index key for an Internet e-mail address to be looked up
902 void directory_key(char *key, char *addr) {
906 for (i=0; !IsEmptyStr(&addr[i]); ++i) {
907 if (!isspace(addr[i])) {
908 key[keylen++] = tolower(addr[i]);
913 syslog(LOG_DEBUG, "Directory key is <%s>\n", key);
918 /* Return nonzero if the supplied address is in a domain we keep in
921 int IsDirectory(char *addr, int allow_masq_domains) {
925 extract_token(domain, addr, 1, '@', sizeof domain);
928 h = CtdlHostAlias(domain);
930 if ( (h == hostalias_masq) && allow_masq_domains)
933 if ( (h == hostalias_localhost) || (h == hostalias_directory) ) {
943 * Initialize the directory database (erasing anything already there)
945 void CtdlDirectoryInit(void) {
946 cdb_trunc(CDB_DIRECTORY);
951 * Add an Internet e-mail address to the directory for a user
953 void CtdlDirectoryAddUser(char *internet_addr, char *citadel_addr) {
956 if (IsDirectory(internet_addr, 0) == 0) return;
957 syslog(LOG_DEBUG, "Create directory entry: %s --> %s\n", internet_addr, citadel_addr);
958 directory_key(key, internet_addr);
959 cdb_store(CDB_DIRECTORY, key, strlen(key), citadel_addr, strlen(citadel_addr)+1 );
964 * Delete an Internet e-mail address from the directory.
966 * (NOTE: we don't actually use or need the citadel_addr variable; it's merely
967 * here because the callback API expects to be able to send it.)
969 void CtdlDirectoryDelUser(char *internet_addr, char *citadel_addr) {
972 syslog(LOG_DEBUG, "Delete directory entry: %s --> %s\n", internet_addr, citadel_addr);
973 directory_key(key, internet_addr);
974 cdb_delete(CDB_DIRECTORY, key, strlen(key) );
979 * Look up an Internet e-mail address in the directory.
980 * On success: returns 0, and Citadel address stored in 'target'
981 * On failure: returns nonzero
983 int CtdlDirectoryLookup(char *target, char *internet_addr, size_t targbuflen) {
984 struct cdbdata *cdbrec;
987 /* Dump it in there unchanged, just for kicks */
988 safestrncpy(target, internet_addr, targbuflen);
990 /* Only do lookups for addresses with hostnames in them */
991 if (num_tokens(internet_addr, '@') != 2) return(-1);
993 /* Only do lookups for domains in the directory */
994 if (IsDirectory(internet_addr, 0) == 0) return(-1);
996 directory_key(key, internet_addr);
997 cdbrec = cdb_fetch(CDB_DIRECTORY, key, strlen(key) );
998 if (cdbrec != NULL) {
999 safestrncpy(target, cdbrec->ptr, targbuflen);
1009 * Harvest any email addresses that someone might want to have in their
1010 * "collected addresses" book.
1012 char *harvest_collected_addresses(struct CtdlMessage *msg) {
1015 char user[256], node[256], name[256];
1020 if (msg == NULL) return(NULL);
1024 if (msg->cm_fields['A'] != NULL) {
1025 strcat(addr, msg->cm_fields['A']);
1027 if (msg->cm_fields['F'] != NULL) {
1029 strcat(addr, msg->cm_fields['F']);
1031 if (IsDirectory(msg->cm_fields['F'], 0)) {
1036 if (is_harvestable) {
1037 coll = strdup(addr);
1043 if (coll == NULL) return(NULL);
1045 /* Scan both the R (To) and Y (CC) fields */
1046 for (i = 0; i < 2; ++i) {
1047 if (i == 0) field = 'R' ;
1048 if (i == 1) field = 'Y' ;
1050 if (msg->cm_fields[field] != NULL) {
1051 for (j=0; j<num_tokens(msg->cm_fields[field], ','); ++j) {
1052 extract_token(addr, msg->cm_fields[field], j, ',', sizeof addr);
1053 if (strstr(addr, "=?") != NULL)
1054 utf8ify_rfc822_string(addr);
1055 process_rfc822_addr(addr, user, node, name);
1056 h = CtdlHostAlias(node);
1057 if ( (h != hostalias_localhost) && (h != hostalias_directory) ) {
1058 coll = realloc(coll, strlen(coll) + strlen(addr) + 4);
1059 if (coll == NULL) return(NULL);
1060 if (!IsEmptyStr(coll)) {
1070 if (IsEmptyStr(coll)) {