4 * This file contains functions which handle the mapping of Internet addresses
5 * to users on the Citadel system.
17 #include <sys/types.h>
19 #if TIME_WITH_SYS_TIME
20 # include <sys/time.h>
24 # include <sys/time.h>
33 #include <libcitadel.h>
36 #include "sysdep_decls.h"
37 #include "citserver.h"
41 #include "internet_addressing.h"
44 #include "parsedate.h"
47 #include "ctdl_module.h"
58 /* This is the non-define version in case of s.b. needing to debug */
59 inline void FindNextEnd (char *bptr, char *end)
61 /* Find the next ?Q? */
62 end = strchr(bptr + 2, '?');
63 if (end == NULL) return NULL;
64 if (((*(end + 1) == 'B') || (*(end + 1) == 'Q')) &&
65 (*(end + 2) == '?')) {
66 /* skip on to the end of the cluster, the next ?= */
67 end = strstr(end + 3, "?=");
70 /* sort of half valid encoding, try to find an end. */
71 end = strstr(bptr, "?=");
75 #define FindNextEnd(bptr, end) { \
76 end = strchr(bptr + 2, '?'); \
78 if (((*(end + 1) == 'B') || (*(end + 1) == 'Q')) && (*(end + 2) == '?')) { \
79 end = strstr(end + 3, "?="); \
80 } else end = strstr(bptr, "?="); \
85 * Handle subjects with RFC2047 encoding such as:
86 * =?koi8-r?B?78bP0s3Mxc7JxSDXz9rE1dvO2c3JINvB0sHNySDP?=
88 void utf8ify_rfc822_string(char *buf) {
89 char *start, *end, *next, *nextend, *ptr;
94 iconv_t ic = (iconv_t)(-1) ;
95 char *ibuf; /**< Buffer of characters to be converted */
96 char *obuf; /**< Buffer for converted characters */
97 size_t ibuflen; /**< Length of input buffer */
98 size_t obuflen; /**< Length of output buffer */
99 char *isav; /**< Saved pointer to input buffer */
100 char *osav; /**< Saved pointer to output buffer */
103 int illegal_non_rfc2047_encoding = 0;
105 /* Sometimes, badly formed messages contain strings which were simply
106 * written out directly in some foreign character set instead of
107 * using RFC2047 encoding. This is illegal but we will attempt to
108 * handle it anyway by converting from a user-specified default
109 * charset to UTF-8 if we see any nonprintable characters.
112 for (i=0; i<len; ++i) {
113 if ((buf[i] < 32) || (buf[i] > 126)) {
114 illegal_non_rfc2047_encoding = 1;
115 i = len; ///< take a shortcut, it won't be more than one.
118 if (illegal_non_rfc2047_encoding) {
119 const char *default_header_charset = "iso-8859-1";
120 if ( (strcasecmp(default_header_charset, "UTF-8")) && (strcasecmp(default_header_charset, "us-ascii")) ) {
121 ctdl_iconv_open("UTF-8", default_header_charset, &ic);
122 if (ic != (iconv_t)(-1) ) {
125 safestrncpy(ibuf, buf, 1024);
126 ibuflen = strlen(ibuf);
128 obuf = (char *) malloc(obuflen);
130 iconv(ic, &ibuf, &ibuflen, &obuf, &obuflen);
131 osav[1024-obuflen] = 0;
140 /* pre evaluate the first pair */
141 nextend = end = NULL;
143 start = strstr(buf, "=?");
145 FindNextEnd (start, end);
147 while ((start != NULL) && (end != NULL))
149 next = strstr(end, "=?");
151 FindNextEnd(next, nextend);
155 /* did we find two partitions */
156 if ((next != NULL) &&
160 while ((ptr < next) &&
166 /* did we find a gab just filled with blanks? */
171 len - (next - start));
173 /* now terminate the gab at the end */
174 delta = (next - end) - 2;
178 /* move next to its new location. */
183 /* our next-pair is our new first pair now. */
188 /* Now we handle foreign character sets properly encoded
191 start = strstr(buf, "=?");
192 FindNextEnd((start != NULL)? start : buf, end);
193 while (start != NULL && end != NULL && end > start)
195 extract_token(charset, start, 1, '?', sizeof charset);
196 extract_token(encoding, start, 2, '?', sizeof encoding);
197 extract_token(istr, start, 3, '?', sizeof istr);
201 if (!strcasecmp(encoding, "B")) { /**< base64 */
202 ibuflen = CtdlDecodeBase64(ibuf, istr, strlen(istr));
204 else if (!strcasecmp(encoding, "Q")) { /**< quoted-printable */
212 if (istr[pos] == '_') istr[pos] = ' ';
216 ibuflen = CtdlDecodeQuotedPrintable(ibuf, istr, len);
219 strcpy(ibuf, istr); /**< unknown encoding */
220 ibuflen = strlen(istr);
223 ctdl_iconv_open("UTF-8", charset, &ic);
224 if (ic != (iconv_t)(-1) ) {
226 obuf = (char *) malloc(obuflen);
228 iconv(ic, &ibuf, &ibuflen, &obuf, &obuflen);
229 osav[1024-obuflen] = 0;
234 remove_token(end, 0, '?');
235 remove_token(end, 0, '?');
236 remove_token(end, 0, '?');
237 remove_token(end, 0, '?');
238 strcpy(end, &end[1]);
240 snprintf(newbuf, sizeof newbuf, "%s%s%s", buf, osav, end);
249 remove_token(end, 0, '?');
250 remove_token(end, 0, '?');
251 remove_token(end, 0, '?');
252 remove_token(end, 0, '?');
253 strcpy(end, &end[1]);
255 snprintf(newbuf, sizeof newbuf, "%s(unreadable)%s", buf, end);
262 * Since spammers will go to all sorts of absurd lengths to get their
263 * messages through, there are LOTS of corrupt headers out there.
264 * So, prevent a really badly formed RFC2047 header from throwing
265 * this function into an infinite loop.
268 if (passes > 20) return;
270 start = strstr(buf, "=?");
271 FindNextEnd((start != NULL)? start : buf, end);
276 inline void utf8ify_rfc822_string(char *a){};
287 char *inetcfg = NULL;
288 struct spamstrings_t *spamstrings = NULL;
292 * Return nonzero if the supplied name is an alias for this host.
294 int CtdlHostAlias(char *fqdn) {
298 char host[256], type[256];
301 if (fqdn == NULL) return(hostalias_nomatch);
302 if (IsEmptyStr(fqdn)) return(hostalias_nomatch);
303 if (!strcasecmp(fqdn, "localhost")) return(hostalias_localhost);
304 if (!strcasecmp(fqdn, config.c_fqdn)) return(hostalias_localhost);
305 if (!strcasecmp(fqdn, config.c_nodename)) return(hostalias_localhost);
306 if (inetcfg == NULL) return(hostalias_nomatch);
308 config_lines = num_tokens(inetcfg, '\n');
309 for (i=0; i<config_lines; ++i) {
310 extract_token(buf, inetcfg, i, '\n', sizeof buf);
311 extract_token(host, buf, 0, '|', sizeof host);
312 extract_token(type, buf, 1, '|', sizeof type);
316 /* Process these in a specific order, in case there are multiple matches.
317 * We want directory to override masq, for example.
320 if ( (!strcasecmp(type, "masqdomain")) && (!strcasecmp(fqdn, host))) {
321 found = hostalias_masq;
323 if ( (!strcasecmp(type, "localhost")) && (!strcasecmp(fqdn, host))) {
324 found = hostalias_localhost;
326 if ( (!strcasecmp(type, "directory")) && (!strcasecmp(fqdn, host))) {
327 found = hostalias_directory;
330 if (found) return(found);
333 return(hostalias_nomatch);
343 * Return 0 if a given string fuzzy-matches a Citadel user account
345 * FIXME ... this needs to be updated to handle aliases.
347 int fuzzy_match(struct ctdluser *us, char *matchstring) {
351 if ( (!strncasecmp(matchstring, "cit", 3))
352 && (atol(&matchstring[3]) == us->usernum)) {
356 len = strlen(matchstring);
357 for (a=0; !IsEmptyStr(&us->fullname[a]); ++a) {
358 if (!strncasecmp(&us->fullname[a],
368 * Unfold a multi-line field into a single line, removing multi-whitespaces
370 void unfold_rfc822_field(char **field, char **FieldEnd)
373 char *pField = *field;
375 char *pFieldEnd = *FieldEnd;
377 while (isspace(*pField))
379 /* remove leading/trailing whitespace */
382 while (isspace(*pFieldEnd))
385 *FieldEnd = pFieldEnd;
386 /* convert non-space whitespace to spaces, and remove double blanks */
387 for (sField = *field = pField;
391 if (*pField=='\"') quote = 1 - quote;
393 if (isspace(*sField))
399 while ((sField < pFieldEnd) &&
404 else *pField = *sField;
407 *FieldEnd = pField - 1;
413 * Split an RFC822-style address into userid, host, and full name
416 void process_rfc822_addr(const char *rfc822, char *user, char *node, char *name)
421 strcpy(node, config.c_fqdn);
424 if (rfc822 == NULL) return;
426 /* extract full name - first, it's From minus <userid> */
427 strcpy(name, rfc822);
428 stripout(name, '<', '>');
430 /* strip anything to the left of a bang */
431 while ((!IsEmptyStr(name)) && (haschar(name, '!') > 0))
432 strcpy(name, &name[1]);
434 /* and anything to the right of a @ or % */
435 for (a = 0; a < strlen(name); ++a) {
442 /* but if there are parentheses, that changes the rules... */
443 if ((haschar(rfc822, '(') == 1) && (haschar(rfc822, ')') == 1)) {
444 strcpy(name, rfc822);
445 stripallbut(name, '(', ')');
448 /* but if there are a set of quotes, that supersedes everything */
449 if (haschar(rfc822, 34) == 2) {
450 strcpy(name, rfc822);
451 while ((!IsEmptyStr(name)) && (name[0] != 34)) {
452 strcpy(&name[0], &name[1]);
454 strcpy(&name[0], &name[1]);
455 for (a = 0; a < strlen(name); ++a)
459 /* extract user id */
460 strcpy(user, rfc822);
462 /* first get rid of anything in parens */
463 stripout(user, '(', ')');
465 /* if there's a set of angle brackets, strip it down to that */
466 if ((haschar(user, '<') == 1) && (haschar(user, '>') == 1)) {
467 stripallbut(user, '<', '>');
470 /* strip anything to the left of a bang */
471 while ((!IsEmptyStr(user)) && (haschar(user, '!') > 0))
472 strcpy(user, &user[1]);
474 /* and anything to the right of a @ or % */
475 for (a = 0; a < strlen(user); ++a) {
483 /* extract node name */
484 strcpy(node, rfc822);
486 /* first get rid of anything in parens */
487 stripout(node, '(', ')');
489 /* if there's a set of angle brackets, strip it down to that */
490 if ((haschar(node, '<') == 1) && (haschar(node, '>') == 1)) {
491 stripallbut(node, '<', '>');
494 /* If no node specified, tack ours on instead */
496 (haschar(node, '@')==0)
497 && (haschar(node, '%')==0)
498 && (haschar(node, '!')==0)
500 strcpy(node, config.c_nodename);
505 /* strip anything to the left of a @ */
506 while ((!IsEmptyStr(node)) && (haschar(node, '@') > 0))
507 strcpy(node, &node[1]);
509 /* strip anything to the left of a % */
510 while ((!IsEmptyStr(node)) && (haschar(node, '%') > 0))
511 strcpy(node, &node[1]);
513 /* reduce multiple system bang paths to node!user */
514 while ((!IsEmptyStr(node)) && (haschar(node, '!') > 1))
515 strcpy(node, &node[1]);
517 /* now get rid of the user portion of a node!user string */
518 for (a = 0; a < strlen(node); ++a)
523 /* strip leading and trailing spaces in all strings */
528 /* If we processed a string that had the address in angle brackets
529 * but no name outside the brackets, we now have an empty name. In
530 * this case, use the user portion of the address as the name.
532 if ((IsEmptyStr(name)) && (!IsEmptyStr(user))) {
540 * convert_field() is a helper function for convert_internet_message().
541 * Given start/end positions for an rfc822 field, it converts it to a Citadel
542 * field if it wants to, and unfolds it if necessary.
544 * Returns 1 if the field was converted and inserted into the Citadel message
545 * structure, implying that the source field should be removed from the
548 int convert_field(struct CtdlMessage *msg, const char *beg, const char *end) {
549 char *key, *value, *valueend;
553 const char *colonpos = NULL;
563 for (pos = end; pos >= beg; pos--) {
564 if (*pos == ':') colonpos = pos;
567 if (colonpos == NULL) return(0); /* no colon? not a valid header line */
570 key = malloc(len + 2);
571 memcpy(key, beg, len + 1);
573 valueend = key + len;
574 * ( key + (colonpos - beg) ) = '\0';
575 value = &key[(colonpos - beg) + 1];
576 unfold_rfc822_field(&value, &valueend);
577 valuelen = valueend - value + 1;
580 * Here's the big rfc822-to-citadel loop.
583 /* Date/time is converted into a unix timestamp. If the conversion
584 * fails, we replace it with the time the message arrived locally.
586 if (!strcasecmp(key, "Date")) {
587 parsed_date = parsedate(value);
588 if (parsed_date < 0L) parsed_date = time(NULL);
589 snprintf(buf, sizeof buf, "%ld", (long)parsed_date );
590 if (msg->cm_fields['T'] == NULL)
591 msg->cm_fields['T'] = strdup(buf);
595 else if (!strcasecmp(key, "From")) {
596 process_rfc822_addr(value, user, node, name);
597 CtdlLogPrintf(CTDL_DEBUG, "Converted to <%s@%s> (%s)\n", user, node, name);
598 snprintf(addr, sizeof addr, "%s@%s", user, node);
599 if (msg->cm_fields['A'] == NULL)
600 msg->cm_fields['A'] = strdup(name);
602 if (msg->cm_fields['F'] == NULL)
603 msg->cm_fields['F'] = strdup(addr);
607 else if (!strcasecmp(key, "Subject")) {
608 if (msg->cm_fields['U'] == NULL)
609 msg->cm_fields['U'] = strndup(value, valuelen);
613 else if (!strcasecmp(key, "List-ID")) {
614 if (msg->cm_fields['L'] == NULL)
615 msg->cm_fields['L'] = strndup(value, valuelen);
619 else if (!strcasecmp(key, "To")) {
620 if (msg->cm_fields['R'] == NULL)
621 msg->cm_fields['R'] = strndup(value, valuelen);
625 else if (!strcasecmp(key, "CC")) {
626 if (msg->cm_fields['Y'] == NULL)
627 msg->cm_fields['Y'] = strndup(value, valuelen);
631 else if (!strcasecmp(key, "Message-ID")) {
632 if (msg->cm_fields['I'] != NULL) {
633 CtdlLogPrintf(CTDL_WARNING, "duplicate message id\n");
636 if (msg->cm_fields['I'] == NULL) {
637 msg->cm_fields['I'] = strndup(value, valuelen);
639 /* Strip angle brackets */
640 while (haschar(msg->cm_fields['I'], '<') > 0) {
641 strcpy(&msg->cm_fields['I'][0],
642 &msg->cm_fields['I'][1]);
644 for (i = 0; i<strlen(msg->cm_fields['I']); ++i)
645 if (msg->cm_fields['I'][i] == '>')
646 msg->cm_fields['I'][i] = 0;
652 else if (!strcasecmp(key, "Return-Path")) {
653 if (msg->cm_fields['P'] == NULL)
654 msg->cm_fields['P'] = strndup(value, valuelen);
658 else if (!strcasecmp(key, "Envelope-To")) {
659 if (msg->cm_fields['V'] == NULL)
660 msg->cm_fields['V'] = strndup(value, valuelen);
664 else if (!strcasecmp(key, "References")) {
665 if (msg->cm_fields['W'] != NULL) {
666 free(msg->cm_fields['W']);
668 msg->cm_fields['W'] = strndup(value, valuelen);
672 else if (!strcasecmp(key, "In-reply-to")) {
673 if (msg->cm_fields['W'] == NULL) { /* References: supersedes In-reply-to: */
674 msg->cm_fields['W'] = strndup(value, valuelen);
681 /* Clean up and move on. */
682 free(key); /* Don't free 'value', it's actually the same buffer */
688 * Convert RFC822 references format (References) to Citadel references format (Weferences)
690 void convert_references_to_wefewences(char *str) {
691 int bracket_nesting = 0;
693 char *moveptr = NULL;
700 if (bracket_nesting < 0) bracket_nesting = 0;
702 if ((ch == '>') && (bracket_nesting == 0) && (*(ptr+1)) && (ptr>str) ) {
706 else if (bracket_nesting > 0) {
712 *moveptr = *(moveptr+1);
716 if (ch == '<') ++bracket_nesting;
723 * Convert an RFC822 message (headers + body) to a CtdlMessage structure.
724 * NOTE: the supplied buffer becomes part of the CtdlMessage structure, and
725 * will be deallocated when CtdlFreeMessage() is called. Therefore, the
726 * supplied buffer should be DEREFERENCED. It should not be freed or used
729 struct CtdlMessage *convert_internet_message(char *rfc822) {
730 StrBuf *RFCBuf = NewStrBufPlain(rfc822, -1);
732 return convert_internet_message_buf(&RFCBuf);
737 struct CtdlMessage *convert_internet_message_buf(StrBuf **rfc822)
739 struct CtdlMessage *msg;
740 const char *pos, *beg, *end, *totalend;
741 int done, alldone = 0;
744 StrBuf *OtherHeaders;
746 msg = malloc(sizeof(struct CtdlMessage));
747 if (msg == NULL) return msg;
749 memset(msg, 0, sizeof(struct CtdlMessage));
750 msg->cm_magic = CTDLMESSAGE_MAGIC; /* self check */
751 msg->cm_anon_type = 0; /* never anonymous */
752 msg->cm_format_type = FMT_RFC822; /* internet message */
754 pos = ChrPtr(*rfc822);
755 totalend = pos + StrLength(*rfc822);
757 OtherHeaders = NewStrBufPlain(NULL, StrLength(*rfc822));
761 /* Locate beginning and end of field, keeping in mind that
762 * some fields might be multiline
766 while ((end < totalend) &&
772 (!isspace(*(pos+1))))
777 /* done with headers? */
779 ( (*(pos+1)=='\n') ||
785 if (pos >= (totalend - 1) )
795 /* At this point we have a field. Are we interested in it? */
796 converted = convert_field(msg, beg, end);
798 /* Strip the field out of the RFC822 header if we used it */
800 StrBufAppendBufPlain(OtherHeaders, beg, end - beg, 0);
801 StrBufAppendBufPlain(OtherHeaders, HKEY("\n"), 0);
804 /* If we've hit the end of the message, bail out */
808 StrBufAppendBufPlain(OtherHeaders, HKEY("\n"), 0);
810 StrBufAppendBufPlain(OtherHeaders, pos, totalend - pos, 0);
812 msg->cm_fields['M'] = SmashStrBuf(&OtherHeaders);
814 /* Follow-up sanity checks... */
816 /* If there's no timestamp on this message, set it to now. */
817 if (msg->cm_fields['T'] == NULL) {
818 snprintf(buf, sizeof buf, "%ld", (long)time(NULL));
819 msg->cm_fields['T'] = strdup(buf);
822 /* If a W (references, or rather, Wefewences) field is present, we
823 * have to convert it from RFC822 format to Citadel format.
825 if (msg->cm_fields['W'] != NULL) {
826 convert_references_to_wefewences(msg->cm_fields['W']);
835 * Look for a particular header field in an RFC822 message text. If the
836 * requested field is found, it is unfolded (if necessary) and returned to
837 * the caller. The field name is stripped out, leaving only its contents.
838 * The caller is responsible for freeing the returned buffer. If the requested
839 * field is not present, or anything else goes wrong, it returns NULL.
841 char *rfc822_fetch_field(char *rfc822, const char *fieldname) {
842 char *fieldbuf = NULL;
843 const char *end_of_headers;
844 const char *field_start;
849 /* Should never happen, but sometimes we get stupid */
850 if (rfc822 == NULL) return(NULL);
851 if (fieldname == NULL) return(NULL);
853 snprintf(fieldhdr, sizeof fieldhdr, "%s:", fieldname);
855 /* Locate the end of the headers, so we don't run past that point */
856 end_of_headers = bmstrcasestr(rfc822, "\n\r\n");
857 if (end_of_headers == NULL) {
858 end_of_headers = bmstrcasestr(rfc822, "\n\n");
860 if (end_of_headers == NULL) return (NULL);
862 field_start = bmstrcasestr(rfc822, fieldhdr);
863 if (field_start == NULL) return(NULL);
864 if (field_start > end_of_headers) return(NULL);
866 fieldbuf = malloc(SIZ);
867 strcpy(fieldbuf, "");
870 ptr = memreadline(ptr, fieldbuf, SIZ-strlen(fieldbuf) );
871 while ( (isspace(ptr[0])) && (ptr < end_of_headers) ) {
872 strcat(fieldbuf, " ");
873 cont = &fieldbuf[strlen(fieldbuf)];
874 ptr = memreadline(ptr, cont, SIZ-strlen(fieldbuf) );
878 strcpy(fieldbuf, &fieldbuf[strlen(fieldhdr)]);
886 /*****************************************************************************
887 * DIRECTORY MANAGEMENT FUNCTIONS *
888 *****************************************************************************/
891 * Generate the index key for an Internet e-mail address to be looked up
894 void directory_key(char *key, char *addr) {
898 for (i=0; !IsEmptyStr(&addr[i]); ++i) {
899 if (!isspace(addr[i])) {
900 key[keylen++] = tolower(addr[i]);
905 CtdlLogPrintf(CTDL_DEBUG, "Directory key is <%s>\n", key);
910 /* Return nonzero if the supplied address is in a domain we keep in
913 int IsDirectory(char *addr, int allow_masq_domains) {
917 extract_token(domain, addr, 1, '@', sizeof domain);
920 h = CtdlHostAlias(domain);
922 if ( (h == hostalias_masq) && allow_masq_domains)
925 if ( (h == hostalias_localhost) || (h == hostalias_directory) ) {
935 * Initialize the directory database (erasing anything already there)
937 void CtdlDirectoryInit(void) {
938 cdb_trunc(CDB_DIRECTORY);
943 * Add an Internet e-mail address to the directory for a user
945 void CtdlDirectoryAddUser(char *internet_addr, char *citadel_addr) {
948 if (IsDirectory(internet_addr, 0) == 0) return;
949 CtdlLogPrintf(CTDL_DEBUG, "Create directory entry: %s --> %s\n", internet_addr, citadel_addr);
950 directory_key(key, internet_addr);
951 cdb_store(CDB_DIRECTORY, key, strlen(key), citadel_addr, strlen(citadel_addr)+1 );
956 * Delete an Internet e-mail address from the directory.
958 * (NOTE: we don't actually use or need the citadel_addr variable; it's merely
959 * here because the callback API expects to be able to send it.)
961 void CtdlDirectoryDelUser(char *internet_addr, char *citadel_addr) {
964 CtdlLogPrintf(CTDL_DEBUG, "Delete directory entry: %s --> %s\n", internet_addr, citadel_addr);
965 directory_key(key, internet_addr);
966 cdb_delete(CDB_DIRECTORY, key, strlen(key) );
971 * Look up an Internet e-mail address in the directory.
972 * On success: returns 0, and Citadel address stored in 'target'
973 * On failure: returns nonzero
975 int CtdlDirectoryLookup(char *target, char *internet_addr, size_t targbuflen) {
976 struct cdbdata *cdbrec;
979 /* Dump it in there unchanged, just for kicks */
980 safestrncpy(target, internet_addr, targbuflen);
982 /* Only do lookups for addresses with hostnames in them */
983 if (num_tokens(internet_addr, '@') != 2) return(-1);
985 /* Only do lookups for domains in the directory */
986 if (IsDirectory(internet_addr, 0) == 0) return(-1);
988 directory_key(key, internet_addr);
989 cdbrec = cdb_fetch(CDB_DIRECTORY, key, strlen(key) );
990 if (cdbrec != NULL) {
991 safestrncpy(target, cdbrec->ptr, targbuflen);
1001 * Harvest any email addresses that someone might want to have in their
1002 * "collected addresses" book.
1004 char *harvest_collected_addresses(struct CtdlMessage *msg) {
1007 char user[256], node[256], name[256];
1012 if (msg == NULL) return(NULL);
1016 if (msg->cm_fields['A'] != NULL) {
1017 strcat(addr, msg->cm_fields['A']);
1019 if (msg->cm_fields['F'] != NULL) {
1021 strcat(addr, msg->cm_fields['F']);
1023 if (IsDirectory(msg->cm_fields['F'], 0)) {
1028 if (is_harvestable) {
1029 coll = strdup(addr);
1035 if (coll == NULL) return(NULL);
1037 /* Scan both the R (To) and Y (CC) fields */
1038 for (i = 0; i < 2; ++i) {
1039 if (i == 0) field = 'R' ;
1040 if (i == 1) field = 'Y' ;
1042 if (msg->cm_fields[field] != NULL) {
1043 for (j=0; j<num_tokens(msg->cm_fields[field], ','); ++j) {
1044 extract_token(addr, msg->cm_fields[field], j, ',', sizeof addr);
1045 if (strstr(addr, "=?") != NULL)
1046 utf8ify_rfc822_string(addr);
1047 process_rfc822_addr(addr, user, node, name);
1048 h = CtdlHostAlias(node);
1049 if ( (h != hostalias_localhost) && (h != hostalias_directory) ) {
1050 coll = realloc(coll, strlen(coll) + strlen(addr) + 4);
1051 if (coll == NULL) return(NULL);
1052 if (!IsEmptyStr(coll)) {
1062 if (IsEmptyStr(coll)) {