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.
26 #include <sys/types.h>
31 #include <libcitadel.h>
34 #include "sysdep_decls.h"
35 #include "citserver.h"
39 #include "internet_addressing.h"
42 #include "parsedate.h"
44 #include "ctdl_module.h"
49 /* This is the non-define version in case of s.b. needing to debug */
50 inline void FindNextEnd (char *bptr, char *end)
52 /* Find the next ?Q? */
53 end = strchr(bptr + 2, '?');
54 if (end == NULL) return NULL;
55 if (((*(end + 1) == 'B') || (*(end + 1) == 'Q')) &&
56 (*(end + 2) == '?')) {
57 /* skip on to the end of the cluster, the next ?= */
58 end = strstr(end + 3, "?=");
61 /* sort of half valid encoding, try to find an end. */
62 end = strstr(bptr, "?=");
66 #define FindNextEnd(bptr, end) { \
67 end = strchr(bptr + 2, '?'); \
69 if (((*(end + 1) == 'B') || (*(end + 1) == 'Q')) && (*(end + 2) == '?')) { \
70 end = strstr(end + 3, "?="); \
71 } else end = strstr(bptr, "?="); \
76 * Handle subjects with RFC2047 encoding such as:
77 * =?koi8-r?B?78bP0s3Mxc7JxSDXz9rE1dvO2c3JINvB0sHNySDP?=
79 void utf8ify_rfc822_string(char *buf) {
80 char *start, *end, *next, *nextend, *ptr;
85 iconv_t ic = (iconv_t)(-1) ;
86 char *ibuf; /**< Buffer of characters to be converted */
87 char *obuf; /**< Buffer for converted characters */
88 size_t ibuflen; /**< Length of input buffer */
89 size_t obuflen; /**< Length of output buffer */
90 char *isav; /**< Saved pointer to input buffer */
91 char *osav; /**< Saved pointer to output buffer */
94 int illegal_non_rfc2047_encoding = 0;
96 /* Sometimes, badly formed messages contain strings which were simply
97 * written out directly in some foreign character set instead of
98 * using RFC2047 encoding. This is illegal but we will attempt to
99 * handle it anyway by converting from a user-specified default
100 * charset to UTF-8 if we see any nonprintable characters.
103 for (i=0; i<len; ++i) {
104 if ((buf[i] < 32) || (buf[i] > 126)) {
105 illegal_non_rfc2047_encoding = 1;
106 i = len; ///< take a shortcut, it won't be more than one.
109 if (illegal_non_rfc2047_encoding) {
110 const char *default_header_charset = "iso-8859-1";
111 if ( (strcasecmp(default_header_charset, "UTF-8")) && (strcasecmp(default_header_charset, "us-ascii")) ) {
112 ctdl_iconv_open("UTF-8", default_header_charset, &ic);
113 if (ic != (iconv_t)(-1) ) {
116 safestrncpy(ibuf, buf, 1024);
117 ibuflen = strlen(ibuf);
119 obuf = (char *) malloc(obuflen);
121 iconv(ic, &ibuf, &ibuflen, &obuf, &obuflen);
122 osav[1024-obuflen] = 0;
131 /* pre evaluate the first pair */
132 nextend = end = NULL;
134 start = strstr(buf, "=?");
136 FindNextEnd (start, end);
138 while ((start != NULL) && (end != NULL))
140 next = strstr(end, "=?");
142 FindNextEnd(next, nextend);
146 /* did we find two partitions */
147 if ((next != NULL) &&
151 while ((ptr < next) &&
157 /* did we find a gab just filled with blanks? */
162 len - (next - start));
164 /* now terminate the gab at the end */
165 delta = (next - end) - 2;
169 /* move next to its new location. */
174 /* our next-pair is our new first pair now. */
179 /* Now we handle foreign character sets properly encoded
182 start = strstr(buf, "=?");
183 FindNextEnd((start != NULL)? start : buf, end);
184 while (start != NULL && end != NULL && end > start)
186 extract_token(charset, start, 1, '?', sizeof charset);
187 extract_token(encoding, start, 2, '?', sizeof encoding);
188 extract_token(istr, start, 3, '?', sizeof istr);
192 if (!strcasecmp(encoding, "B")) { /**< base64 */
193 ibuflen = CtdlDecodeBase64(ibuf, istr, strlen(istr));
195 else if (!strcasecmp(encoding, "Q")) { /**< quoted-printable */
203 if (istr[pos] == '_') istr[pos] = ' ';
207 ibuflen = CtdlDecodeQuotedPrintable(ibuf, istr, len);
210 strcpy(ibuf, istr); /**< unknown encoding */
211 ibuflen = strlen(istr);
214 ctdl_iconv_open("UTF-8", charset, &ic);
215 if (ic != (iconv_t)(-1) ) {
217 obuf = (char *) malloc(obuflen);
219 iconv(ic, &ibuf, &ibuflen, &obuf, &obuflen);
220 osav[1024-obuflen] = 0;
225 remove_token(end, 0, '?');
226 remove_token(end, 0, '?');
227 remove_token(end, 0, '?');
228 remove_token(end, 0, '?');
229 strcpy(end, &end[1]);
231 snprintf(newbuf, sizeof newbuf, "%s%s%s", buf, osav, end);
240 remove_token(end, 0, '?');
241 remove_token(end, 0, '?');
242 remove_token(end, 0, '?');
243 remove_token(end, 0, '?');
244 strcpy(end, &end[1]);
246 snprintf(newbuf, sizeof newbuf, "%s(unreadable)%s", buf, end);
253 * Since spammers will go to all sorts of absurd lengths to get their
254 * messages through, there are LOTS of corrupt headers out there.
255 * So, prevent a really badly formed RFC2047 header from throwing
256 * this function into an infinite loop.
259 if (passes > 20) return;
261 start = strstr(buf, "=?");
262 FindNextEnd((start != NULL)? start : buf, end);
267 inline void utf8ify_rfc822_string(char *a){};
278 char *inetcfg = NULL;
279 struct spamstrings_t *spamstrings = NULL;
283 * Return nonzero if the supplied name is an alias for this host.
285 int CtdlHostAlias(char *fqdn) {
289 char host[256], type[256];
292 if (fqdn == NULL) return(hostalias_nomatch);
293 if (IsEmptyStr(fqdn)) return(hostalias_nomatch);
294 if (!strcasecmp(fqdn, "localhost")) return(hostalias_localhost);
295 if (!strcasecmp(fqdn, CtdlGetConfigStr("c_fqdn"))) return(hostalias_localhost);
296 if (!strcasecmp(fqdn, CtdlGetConfigStr("c_nodename"))) return(hostalias_localhost);
297 if (inetcfg == NULL) return(hostalias_nomatch);
299 config_lines = num_tokens(inetcfg, '\n');
300 for (i=0; i<config_lines; ++i) {
301 extract_token(buf, inetcfg, i, '\n', sizeof buf);
302 extract_token(host, buf, 0, '|', sizeof host);
303 extract_token(type, buf, 1, '|', sizeof type);
307 /* Process these in a specific order, in case there are multiple matches.
308 * We want directory to override masq, for example.
311 if ( (!strcasecmp(type, "masqdomain")) && (!strcasecmp(fqdn, host))) {
312 found = hostalias_masq;
314 if ( (!strcasecmp(type, "localhost")) && (!strcasecmp(fqdn, host))) {
315 found = hostalias_localhost;
317 if ( (!strcasecmp(type, "directory")) && (!strcasecmp(fqdn, host))) {
318 found = hostalias_directory;
321 if (found) return(found);
324 return(hostalias_nomatch);
330 * Determine whether a given Internet address belongs to the current user
332 int CtdlIsMe(char *addr, int addr_buf_len)
337 recp = validate_recipients(addr, NULL, 0);
338 if (recp == NULL) return(0);
340 if (recp->num_local == 0) {
341 free_recipients(recp);
345 for (i=0; i<recp->num_local; ++i) {
346 extract_token(addr, recp->recp_local, i, '|', addr_buf_len);
347 if (!strcasecmp(addr, CC->user.fullname)) {
348 free_recipients(recp);
353 free_recipients(recp);
358 /* If the last item in a list of recipients was truncated to a partial address,
359 * remove it completely in order to avoid choking libSieve
361 void sanitize_truncated_recipient(char *str)
364 if (num_tokens(str, ',') < 2) return;
366 int len = strlen(str);
367 if (len < 900) return;
368 if (len > 998) str[998] = 0;
370 char *cptr = strrchr(str, ',');
373 char *lptr = strchr(cptr, '<');
374 char *rptr = strchr(cptr, '>');
376 if ( (lptr) && (rptr) && (rptr > lptr) ) return;
386 * This function is self explanatory.
387 * (What can I say, I'm in a weird mood today...)
389 void remove_any_whitespace_to_the_left_or_right_of_at_symbol(char *name)
393 for (i = 0; i < strlen(name); ++i) {
394 if (name[i] == '@') {
395 while (isspace(name[i - 1]) && i > 0) {
396 strcpy(&name[i - 1], &name[i]);
399 while (isspace(name[i + 1])) {
400 strcpy(&name[i + 1], &name[i + 2]);
408 * Aliasing for network mail.
409 * (Error messages have been commented out, because this is a server.)
411 int alias(char *name)
412 { /* process alias and routing info for mail */
415 char aaa[SIZ], bbb[SIZ];
416 char *ignetcfg = NULL;
417 char *ignetmap = NULL;
423 char original_name[256];
424 safestrncpy(original_name, name, sizeof original_name);
427 remove_any_whitespace_to_the_left_or_right_of_at_symbol(name);
428 stripallbut(name, '<', '>');
430 fp = fopen(file_mail_aliases, "r");
432 fp = fopen("/dev/null", "r");
439 while (fgets(aaa, sizeof aaa, fp) != NULL) {
440 while (isspace(name[0]))
441 strcpy(name, &name[1]);
442 aaa[strlen(aaa) - 1] = 0;
444 for (a = 0; aaa[a] != '\0'; ++a) {
446 strcpy(bbb, &aaa[a + 1]);
451 if (!strcasecmp(name, aaa))
456 /* Hit the Global Address Book */
457 if (CtdlDirectoryLookup(aaa, name, sizeof aaa) == 0) {
461 if (strcasecmp(original_name, name)) {
462 syslog(LOG_INFO, "%s is being forwarded to %s\n", original_name, name);
465 /* Change "user @ xxx" to "user" if xxx is an alias for this host */
466 for (a=0; name[a] != '\0'; ++a) {
467 if (name[a] == '@') {
468 if (CtdlHostAlias(&name[a+1]) == hostalias_localhost) {
470 syslog(LOG_INFO, "Changed to <%s>\n", name);
476 /* determine local or remote type, see citadel.h */
477 at = haschar(name, '@');
478 if (at == 0) return(MES_LOCAL); /* no @'s - local address */
479 if (at > 1) return(MES_ERROR); /* >1 @'s - invalid address */
480 remove_any_whitespace_to_the_left_or_right_of_at_symbol(name);
482 /* figure out the delivery mode */
483 extract_token(node, name, 1, '@', sizeof node);
485 /* If there are one or more dots in the nodename, we assume that it
486 * is an FQDN and will attempt SMTP delivery to the Internet.
488 if (haschar(node, '.') > 0) {
489 return(MES_INTERNET);
492 /* Otherwise we look in the IGnet maps for a valid Citadel node.
493 * Try directly-connected nodes first...
495 ignetcfg = CtdlGetSysConfig(IGNETCFG);
496 for (i=0; i<num_tokens(ignetcfg, '\n'); ++i) {
497 extract_token(buf, ignetcfg, i, '\n', sizeof buf);
498 extract_token(testnode, buf, 0, '|', sizeof testnode);
499 if (!strcasecmp(node, testnode)) {
507 * Then try nodes that are two or more hops away.
509 ignetmap = CtdlGetSysConfig(IGNETMAP);
510 for (i=0; i<num_tokens(ignetmap, '\n'); ++i) {
511 extract_token(buf, ignetmap, i, '\n', sizeof buf);
512 extract_token(testnode, buf, 0, '|', sizeof testnode);
513 if (!strcasecmp(node, testnode)) {
520 /* If we get to this point it's an invalid node name */
527 * Validate recipients, count delivery types and errors, and handle aliasing
528 * FIXME check for dupes!!!!!
530 * Returns 0 if all addresses are ok, ret->num_error = -1 if no addresses
531 * were specified, or the number of addresses found invalid.
533 * Caller needs to free the result using free_recipients()
535 recptypes *validate_recipients(const char *supplied_recipients,
536 const char *RemoteIdentifier,
538 struct CitContext *CCC = CC;
540 char *recipients = NULL;
543 char this_recp_cooked[256];
550 struct ctdluser tempUS;
551 struct ctdlroom tempQR;
552 struct ctdlroom tempQR2;
558 ret = (recptypes *) malloc(sizeof(recptypes));
559 if (ret == NULL) return(NULL);
561 /* Set all strings to null and numeric values to zero */
562 memset(ret, 0, sizeof(recptypes));
564 if (supplied_recipients == NULL) {
565 recipients = strdup("");
568 recipients = strdup(supplied_recipients);
571 /* Allocate some memory. Yes, this allocates 500% more memory than we will
572 * actually need, but it's healthier for the heap than doing lots of tiny
573 * realloc() calls instead.
575 len = strlen(recipients) + 1024;
576 ret->errormsg = malloc(len);
577 ret->recp_local = malloc(len);
578 ret->recp_internet = malloc(len);
579 ret->recp_ignet = malloc(len);
580 ret->recp_room = malloc(len);
581 ret->display_recp = malloc(len);
582 ret->recp_orgroom = malloc(len);
583 org_recp = malloc(len);
585 ret->errormsg[0] = 0;
586 ret->recp_local[0] = 0;
587 ret->recp_internet[0] = 0;
588 ret->recp_ignet[0] = 0;
589 ret->recp_room[0] = 0;
590 ret->recp_orgroom[0] = 0;
591 ret->display_recp[0] = 0;
593 ret->recptypes_magic = RECPTYPES_MAGIC;
595 /* Change all valid separator characters to commas */
596 for (i=0; !IsEmptyStr(&recipients[i]); ++i) {
597 if ((recipients[i] == ';') || (recipients[i] == '|')) {
602 /* Now start extracting recipients... */
604 while (!IsEmptyStr(recipients)) {
605 for (i=0; i<=strlen(recipients); ++i) {
606 if (recipients[i] == '\"') in_quotes = 1 - in_quotes;
607 if ( ( (recipients[i] == ',') && (!in_quotes) ) || (recipients[i] == 0) ) {
608 safestrncpy(this_recp, recipients, i+1);
610 if (recipients[i] == ',') {
611 strcpy(recipients, &recipients[i+1]);
614 strcpy(recipients, "");
621 if (IsEmptyStr(this_recp))
623 syslog(LOG_DEBUG, "Evaluating recipient #%d: %s\n", num_recps, this_recp);
626 strcpy(org_recp, this_recp);
629 mailtype = alias(this_recp);
631 for (j = 0; !IsEmptyStr(&this_recp[j]); ++j) {
632 if (this_recp[j]=='_') {
633 this_recp_cooked[j] = ' ';
636 this_recp_cooked[j] = this_recp[j];
639 this_recp_cooked[j] = '\0';
644 if (!strcasecmp(this_recp, "sysop")) {
646 strcpy(this_recp, CtdlGetConfigStr("c_aideroom"));
647 if (!IsEmptyStr(ret->recp_room)) {
648 strcat(ret->recp_room, "|");
650 strcat(ret->recp_room, this_recp);
652 else if ( (!strncasecmp(this_recp, "room_", 5))
653 && (!CtdlGetRoom(&tempQR, &this_recp_cooked[5])) ) {
655 /* Save room so we can restore it later */
659 /* Check permissions to send mail to this room */
660 err = CtdlDoIHavePermissionToPostInThisRoom(
665 0 /* 0 = not a reply */
674 if (!IsEmptyStr(ret->recp_room)) {
675 strcat(ret->recp_room, "|");
677 strcat(ret->recp_room, &this_recp_cooked[5]);
679 if (!IsEmptyStr(ret->recp_orgroom)) {
680 strcat(ret->recp_orgroom, "|");
682 strcat(ret->recp_orgroom, org_recp);
686 /* Restore room in case something needs it */
690 else if (CtdlGetUser(&tempUS, this_recp) == 0) {
692 strcpy(this_recp, tempUS.fullname);
693 if (!IsEmptyStr(ret->recp_local)) {
694 strcat(ret->recp_local, "|");
696 strcat(ret->recp_local, this_recp);
698 else if (CtdlGetUser(&tempUS, this_recp_cooked) == 0) {
700 strcpy(this_recp, tempUS.fullname);
701 if (!IsEmptyStr(ret->recp_local)) {
702 strcat(ret->recp_local, "|");
704 strcat(ret->recp_local, this_recp);
712 /* Yes, you're reading this correctly: if the target
713 * domain points back to the local system or an attached
714 * Citadel directory, the address is invalid. That's
715 * because if the address were valid, we would have
716 * already translated it to a local address by now.
718 if (IsDirectory(this_recp, 0)) {
724 if (!IsEmptyStr(ret->recp_internet)) {
725 strcat(ret->recp_internet, "|");
727 strcat(ret->recp_internet, this_recp);
732 if (!IsEmptyStr(ret->recp_ignet)) {
733 strcat(ret->recp_ignet, "|");
735 strcat(ret->recp_ignet, this_recp);
743 if (IsEmptyStr(errmsg)) {
744 snprintf(append, sizeof append, "Invalid recipient: %s", this_recp);
747 snprintf(append, sizeof append, "%s", errmsg);
749 if ( (strlen(ret->errormsg) + strlen(append) + 3) < SIZ) {
750 if (!IsEmptyStr(ret->errormsg)) {
751 strcat(ret->errormsg, "; ");
753 strcat(ret->errormsg, append);
757 if (IsEmptyStr(ret->display_recp)) {
758 strcpy(append, this_recp);
761 snprintf(append, sizeof append, ", %s", this_recp);
763 if ( (strlen(ret->display_recp)+strlen(append)) < SIZ) {
764 strcat(ret->display_recp, append);
770 if ((ret->num_local + ret->num_internet + ret->num_ignet +
771 ret->num_room + ret->num_error) == 0) {
772 ret->num_error = (-1);
773 strcpy(ret->errormsg, "No recipients specified.");
776 syslog(LOG_DEBUG, "validate_recipients()\n");
777 syslog(LOG_DEBUG, " local: %d <%s>\n", ret->num_local, ret->recp_local);
778 syslog(LOG_DEBUG, " room: %d <%s>\n", ret->num_room, ret->recp_room);
779 syslog(LOG_DEBUG, " inet: %d <%s>\n", ret->num_internet, ret->recp_internet);
780 syslog(LOG_DEBUG, " ignet: %d <%s>\n", ret->num_ignet, ret->recp_ignet);
781 syslog(LOG_DEBUG, " error: %d <%s>\n", ret->num_error, ret->errormsg);
789 * Destructor for recptypes
791 void free_recipients(recptypes *valid) {
797 if (valid->recptypes_magic != RECPTYPES_MAGIC) {
798 syslog(LOG_EMERG, "Attempt to call free_recipients() on some other data type!\n");
802 if (valid->errormsg != NULL) free(valid->errormsg);
803 if (valid->recp_local != NULL) free(valid->recp_local);
804 if (valid->recp_internet != NULL) free(valid->recp_internet);
805 if (valid->recp_ignet != NULL) free(valid->recp_ignet);
806 if (valid->recp_room != NULL) free(valid->recp_room);
807 if (valid->recp_orgroom != NULL) free(valid->recp_orgroom);
808 if (valid->display_recp != NULL) free(valid->display_recp);
809 if (valid->bounce_to != NULL) free(valid->bounce_to);
810 if (valid->envelope_from != NULL) free(valid->envelope_from);
811 if (valid->sending_room != NULL) free(valid->sending_room);
816 char *qp_encode_email_addrs(char *source)
818 char *user, *node, *name;
819 const char headerStr[] = "=?UTF-8?Q?";
823 int need_to_encode = 0;
829 long nAddrPtrMax = 50;
834 if (source == NULL) return source;
835 if (IsEmptyStr(source)) return source;
836 syslog(LOG_DEBUG, "qp_encode_email_addrs: [%s]\n", source);
838 AddrPtr = malloc (sizeof (long) * nAddrPtrMax);
839 AddrUtf8 = malloc (sizeof (long) * nAddrPtrMax);
840 memset(AddrUtf8, 0, sizeof (long) * nAddrPtrMax);
843 while (!IsEmptyStr (&source[i])) {
844 if (nColons >= nAddrPtrMax){
847 ptr = (long *) malloc(sizeof (long) * nAddrPtrMax * 2);
848 memcpy (ptr, AddrPtr, sizeof (long) * nAddrPtrMax);
849 free (AddrPtr), AddrPtr = ptr;
851 ptr = (long *) malloc(sizeof (long) * nAddrPtrMax * 2);
852 memset(&ptr[nAddrPtrMax], 0,
853 sizeof (long) * nAddrPtrMax);
855 memcpy (ptr, AddrUtf8, sizeof (long) * nAddrPtrMax);
856 free (AddrUtf8), AddrUtf8 = ptr;
859 if (((unsigned char) source[i] < 32) ||
860 ((unsigned char) source[i] > 126)) {
862 AddrUtf8[nColons] = 1;
864 if (source[i] == '"')
865 InQuotes = !InQuotes;
866 if (!InQuotes && source[i] == ',') {
867 AddrPtr[nColons] = i;
872 if (need_to_encode == 0) {
879 EncodedMaxLen = nColons * (sizeof(headerStr) + 3) + SourceLen * 3;
880 Encoded = (char*) malloc (EncodedMaxLen);
882 for (i = 0; i < nColons; i++)
883 source[AddrPtr[i]++] = '\0';
884 /* TODO: if libidn, this might get larger*/
885 user = malloc(SourceLen + 1);
886 node = malloc(SourceLen + 1);
887 name = malloc(SourceLen + 1);
891 for (i = 0; i < nColons && nPtr != NULL; i++) {
892 nmax = EncodedMaxLen - (nPtr - Encoded);
894 process_rfc822_addr(&source[AddrPtr[i]],
898 /* TODO: libIDN here ! */
899 if (IsEmptyStr(name)) {
900 n = snprintf(nPtr, nmax,
901 (i==0)?"%s@%s" : ",%s@%s",
905 EncodedName = rfc2047encode(name, strlen(name));
906 n = snprintf(nPtr, nmax,
907 (i==0)?"%s <%s@%s>" : ",%s <%s@%s>",
908 EncodedName, user, node);
913 n = snprintf(nPtr, nmax,
915 &source[AddrPtr[i]]);
921 ptr = (char*) malloc(EncodedMaxLen * 2);
922 memcpy(ptr, Encoded, EncodedMaxLen);
923 nnPtr = ptr + (nPtr - Encoded), nPtr = nnPtr;
924 free(Encoded), Encoded = ptr;
926 i--; /* do it once more with properly lengthened buffer */
929 for (i = 0; i < nColons; i++)
930 source[--AddrPtr[i]] = ',';
942 * Return 0 if a given string fuzzy-matches a Citadel user account
944 * FIXME ... this needs to be updated to handle aliases.
946 int fuzzy_match(struct ctdluser *us, char *matchstring) {
950 if ( (!strncasecmp(matchstring, "cit", 3))
951 && (atol(&matchstring[3]) == us->usernum)) {
955 len = strlen(matchstring);
956 for (a=0; !IsEmptyStr(&us->fullname[a]); ++a) {
957 if (!strncasecmp(&us->fullname[a],
967 * Unfold a multi-line field into a single line, removing multi-whitespaces
969 void unfold_rfc822_field(char **field, char **FieldEnd)
972 char *pField = *field;
974 char *pFieldEnd = *FieldEnd;
976 while (isspace(*pField))
978 /* remove leading/trailing whitespace */
981 while (isspace(*pFieldEnd))
984 *FieldEnd = pFieldEnd;
985 /* convert non-space whitespace to spaces, and remove double blanks */
986 for (sField = *field = pField;
990 if ((*sField=='\r') || (*sField=='\n'))
993 while (((*(sField + Offset) == '\r') ||
994 (*(sField + Offset) == '\n') ||
995 (isspace(*(sField + Offset)))) &&
996 (sField + Offset < pFieldEnd))
1002 if (*sField=='\"') quote = 1 - quote;
1004 if (isspace(*sField))
1010 while ((sField < pFieldEnd) &&
1015 else *pField = *sField;
1017 else *pField = *sField;
1021 *FieldEnd = pField - 1;
1027 * Split an RFC822-style address into userid, host, and full name
1030 void process_rfc822_addr(const char *rfc822, char *user, char *node, char *name)
1035 strcpy(node, CtdlGetConfigStr("c_fqdn"));
1038 if (rfc822 == NULL) return;
1040 /* extract full name - first, it's From minus <userid> */
1041 strcpy(name, rfc822);
1042 stripout(name, '<', '>');
1044 /* strip anything to the left of a bang */
1045 while ((!IsEmptyStr(name)) && (haschar(name, '!') > 0))
1046 strcpy(name, &name[1]);
1048 /* and anything to the right of a @ or % */
1049 for (a = 0; name[a] != '\0'; ++a) {
1050 if (name[a] == '@') {
1054 if (name[a] == '%') {
1060 /* but if there are parentheses, that changes the rules... */
1061 if ((haschar(rfc822, '(') == 1) && (haschar(rfc822, ')') == 1)) {
1062 strcpy(name, rfc822);
1063 stripallbut(name, '(', ')');
1066 /* but if there are a set of quotes, that supersedes everything */
1067 if (haschar(rfc822, 34) == 2) {
1068 strcpy(name, rfc822);
1069 while ((!IsEmptyStr(name)) && (name[0] != 34)) {
1070 strcpy(&name[0], &name[1]);
1072 strcpy(&name[0], &name[1]);
1073 for (a = 0; name[a] != '\0'; ++a)
1074 if (name[a] == 34) {
1079 /* extract user id */
1080 strcpy(user, rfc822);
1082 /* first get rid of anything in parens */
1083 stripout(user, '(', ')');
1085 /* if there's a set of angle brackets, strip it down to that */
1086 if ((haschar(user, '<') == 1) && (haschar(user, '>') == 1)) {
1087 stripallbut(user, '<', '>');
1090 /* strip anything to the left of a bang */
1091 while ((!IsEmptyStr(user)) && (haschar(user, '!') > 0))
1092 strcpy(user, &user[1]);
1094 /* and anything to the right of a @ or % */
1095 for (a = 0; user[a] != '\0'; ++a) {
1096 if (user[a] == '@') {
1100 if (user[a] == '%') {
1107 /* extract node name */
1108 strcpy(node, rfc822);
1110 /* first get rid of anything in parens */
1111 stripout(node, '(', ')');
1113 /* if there's a set of angle brackets, strip it down to that */
1114 if ((haschar(node, '<') == 1) && (haschar(node, '>') == 1)) {
1115 stripallbut(node, '<', '>');
1118 /* If no node specified, tack ours on instead */
1120 (haschar(node, '@')==0)
1121 && (haschar(node, '%')==0)
1122 && (haschar(node, '!')==0)
1124 strcpy(node, CtdlGetConfigStr("c_nodename"));
1129 /* strip anything to the left of a @ */
1130 while ((!IsEmptyStr(node)) && (haschar(node, '@') > 0))
1131 strcpy(node, &node[1]);
1133 /* strip anything to the left of a % */
1134 while ((!IsEmptyStr(node)) && (haschar(node, '%') > 0))
1135 strcpy(node, &node[1]);
1137 /* reduce multiple system bang paths to node!user */
1138 while ((!IsEmptyStr(node)) && (haschar(node, '!') > 1))
1139 strcpy(node, &node[1]);
1141 /* now get rid of the user portion of a node!user string */
1142 for (a = 0; node[a] != '\0'; ++a)
1143 if (node[a] == '!') {
1149 /* strip leading and trailing spaces in all strings */
1154 /* If we processed a string that had the address in angle brackets
1155 * but no name outside the brackets, we now have an empty name. In
1156 * this case, use the user portion of the address as the name.
1158 if ((IsEmptyStr(name)) && (!IsEmptyStr(user))) {
1166 * convert_field() is a helper function for convert_internet_message().
1167 * Given start/end positions for an rfc822 field, it converts it to a Citadel
1168 * field if it wants to, and unfolds it if necessary.
1170 * Returns 1 if the field was converted and inserted into the Citadel message
1171 * structure, implying that the source field should be removed from the
1174 int convert_field(struct CtdlMessage *msg, const char *beg, const char *end) {
1175 char *key, *value, *valueend;
1179 const char *colonpos = NULL;
1188 for (pos = end; pos >= beg; pos--) {
1189 if (*pos == ':') colonpos = pos;
1192 if (colonpos == NULL) return(0); /* no colon? not a valid header line */
1195 key = malloc(len + 2);
1196 memcpy(key, beg, len + 1);
1198 valueend = key + len;
1199 * ( key + (colonpos - beg) ) = '\0';
1200 value = &key[(colonpos - beg) + 1];
1201 /* printf("Header: [%s]\nValue: [%s]\n", key, value); */
1202 unfold_rfc822_field(&value, &valueend);
1203 valuelen = valueend - value + 1;
1204 /* printf("UnfoldedValue: [%s]\n", value); */
1207 * Here's the big rfc822-to-citadel loop.
1210 /* Date/time is converted into a unix timestamp. If the conversion
1211 * fails, we replace it with the time the message arrived locally.
1213 if (!strcasecmp(key, "Date")) {
1214 parsed_date = parsedate(value);
1215 if (parsed_date < 0L) parsed_date = time(NULL);
1217 if (CM_IsEmpty(msg, eTimestamp))
1218 CM_SetFieldLONG(msg, eTimestamp, parsed_date);
1222 else if (!strcasecmp(key, "From")) {
1223 process_rfc822_addr(value, user, node, name);
1224 syslog(LOG_DEBUG, "Converted to <%s@%s> (%s)\n", user, node, name);
1225 snprintf(addr, sizeof(addr), "%s@%s", user, node);
1226 if (CM_IsEmpty(msg, eAuthor) && !IsEmptyStr(name))
1227 CM_SetField(msg, eAuthor, name, strlen(name));
1228 if (CM_IsEmpty(msg, erFc822Addr) && !IsEmptyStr(addr))
1229 CM_SetField(msg, erFc822Addr, addr, strlen(addr));
1233 else if (!strcasecmp(key, "Subject")) {
1234 if (CM_IsEmpty(msg, eMsgSubject))
1235 CM_SetField(msg, eMsgSubject, value, valuelen);
1239 else if (!strcasecmp(key, "List-ID")) {
1240 if (CM_IsEmpty(msg, eListID))
1241 CM_SetField(msg, eListID, value, valuelen);
1245 else if (!strcasecmp(key, "To")) {
1246 if (CM_IsEmpty(msg, eRecipient))
1247 CM_SetField(msg, eRecipient, value, valuelen);
1251 else if (!strcasecmp(key, "CC")) {
1252 if (CM_IsEmpty(msg, eCarbonCopY))
1253 CM_SetField(msg, eCarbonCopY, value, valuelen);
1257 else if (!strcasecmp(key, "Message-ID")) {
1258 if (!CM_IsEmpty(msg, emessageId)) {
1259 syslog(LOG_WARNING, "duplicate message id\n");
1266 pValueLen = valuelen;
1267 /* Strip angle brackets */
1268 while (haschar(pValue, '<') > 0) {
1273 for (i = 0; i <= pValueLen; ++i)
1274 if (pValue[i] == '>') {
1279 CM_SetField(msg, emessageId, pValue, pValueLen);
1285 else if (!strcasecmp(key, "Return-Path")) {
1286 if (CM_IsEmpty(msg, eMessagePath))
1287 CM_SetField(msg, eMessagePath, value, valuelen);
1291 else if (!strcasecmp(key, "Envelope-To")) {
1292 if (CM_IsEmpty(msg, eenVelopeTo))
1293 CM_SetField(msg, eenVelopeTo, value, valuelen);
1297 else if (!strcasecmp(key, "References")) {
1298 CM_SetField(msg, eWeferences, value, valuelen);
1302 else if (!strcasecmp(key, "Reply-To")) {
1303 CM_SetField(msg, eReplyTo, value, valuelen);
1307 else if (!strcasecmp(key, "In-reply-to")) {
1308 if (CM_IsEmpty(msg, eWeferences)) /* References: supersedes In-reply-to: */
1309 CM_SetField(msg, eWeferences, value, valuelen);
1315 /* Clean up and move on. */
1316 free(key); /* Don't free 'value', it's actually the same buffer */
1322 * Convert RFC822 references format (References) to Citadel references format (Weferences)
1324 void convert_references_to_wefewences(char *str) {
1325 int bracket_nesting = 0;
1327 char *moveptr = NULL;
1334 if (bracket_nesting < 0) bracket_nesting = 0;
1336 if ((ch == '>') && (bracket_nesting == 0) && (*(ptr+1)) && (ptr>str) ) {
1340 else if (bracket_nesting > 0) {
1346 *moveptr = *(moveptr+1);
1350 if (ch == '<') ++bracket_nesting;
1357 * Convert an RFC822 message (headers + body) to a CtdlMessage structure.
1358 * NOTE: the supplied buffer becomes part of the CtdlMessage structure, and
1359 * will be deallocated when CM_Free() is called. Therefore, the
1360 * supplied buffer should be DEREFERENCED. It should not be freed or used
1363 struct CtdlMessage *convert_internet_message(char *rfc822) {
1364 StrBuf *RFCBuf = NewStrBufPlain(rfc822, -1);
1366 return convert_internet_message_buf(&RFCBuf);
1371 struct CtdlMessage *convert_internet_message_buf(StrBuf **rfc822)
1373 struct CtdlMessage *msg;
1374 const char *pos, *beg, *end, *totalend;
1375 int done, alldone = 0;
1377 StrBuf *OtherHeaders;
1379 msg = malloc(sizeof(struct CtdlMessage));
1380 if (msg == NULL) return msg;
1382 memset(msg, 0, sizeof(struct CtdlMessage));
1383 msg->cm_magic = CTDLMESSAGE_MAGIC; /* self check */
1384 msg->cm_anon_type = 0; /* never anonymous */
1385 msg->cm_format_type = FMT_RFC822; /* internet message */
1387 pos = ChrPtr(*rfc822);
1388 totalend = pos + StrLength(*rfc822);
1390 OtherHeaders = NewStrBufPlain(NULL, StrLength(*rfc822));
1394 /* Locate beginning and end of field, keeping in mind that
1395 * some fields might be multiline
1399 while ((end < totalend) &&
1404 if ( (*pos=='\n') && ((*(pos+1))!=0x20) && ((*(pos+1))!=0x09) )
1409 /* done with headers? */
1411 ( (*(pos+1)=='\n') ||
1417 if (pos >= (totalend - 1) )
1427 /* At this point we have a field. Are we interested in it? */
1428 converted = convert_field(msg, beg, end);
1430 /* Strip the field out of the RFC822 header if we used it */
1432 StrBufAppendBufPlain(OtherHeaders, beg, end - beg, 0);
1433 StrBufAppendBufPlain(OtherHeaders, HKEY("\n"), 0);
1436 /* If we've hit the end of the message, bail out */
1437 if (pos >= totalend)
1440 StrBufAppendBufPlain(OtherHeaders, HKEY("\n"), 0);
1442 StrBufAppendBufPlain(OtherHeaders, pos, totalend - pos, 0);
1444 CM_SetAsFieldSB(msg, eMesageText, &OtherHeaders);
1446 /* Follow-up sanity checks... */
1448 /* If there's no timestamp on this message, set it to now. */
1449 if (CM_IsEmpty(msg, eTimestamp)) {
1450 CM_SetFieldLONG(msg, eTimestamp, time(NULL));
1453 /* If a W (references, or rather, Wefewences) field is present, we
1454 * have to convert it from RFC822 format to Citadel format.
1456 if (!CM_IsEmpty(msg, eWeferences)) {
1458 convert_references_to_wefewences(msg->cm_fields[eWeferences]);
1467 * Look for a particular header field in an RFC822 message text. If the
1468 * requested field is found, it is unfolded (if necessary) and returned to
1469 * the caller. The field name is stripped out, leaving only its contents.
1470 * The caller is responsible for freeing the returned buffer. If the requested
1471 * field is not present, or anything else goes wrong, it returns NULL.
1473 char *rfc822_fetch_field(const char *rfc822, const char *fieldname) {
1474 char *fieldbuf = NULL;
1475 const char *end_of_headers;
1476 const char *field_start;
1481 /* Should never happen, but sometimes we get stupid */
1482 if (rfc822 == NULL) return(NULL);
1483 if (fieldname == NULL) return(NULL);
1485 snprintf(fieldhdr, sizeof fieldhdr, "%s:", fieldname);
1487 /* Locate the end of the headers, so we don't run past that point */
1488 end_of_headers = cbmstrcasestr(rfc822, "\n\r\n");
1489 if (end_of_headers == NULL) {
1490 end_of_headers = cbmstrcasestr(rfc822, "\n\n");
1492 if (end_of_headers == NULL) return (NULL);
1494 field_start = cbmstrcasestr(rfc822, fieldhdr);
1495 if (field_start == NULL) return(NULL);
1496 if (field_start > end_of_headers) return(NULL);
1498 fieldbuf = malloc(SIZ);
1499 strcpy(fieldbuf, "");
1502 ptr = cmemreadline(ptr, fieldbuf, SIZ-strlen(fieldbuf) );
1503 while ( (isspace(ptr[0])) && (ptr < end_of_headers) ) {
1504 strcat(fieldbuf, " ");
1505 cont = &fieldbuf[strlen(fieldbuf)];
1506 ptr = cmemreadline(ptr, cont, SIZ-strlen(fieldbuf) );
1510 strcpy(fieldbuf, &fieldbuf[strlen(fieldhdr)]);
1518 /*****************************************************************************
1519 * DIRECTORY MANAGEMENT FUNCTIONS *
1520 *****************************************************************************/
1523 * Generate the index key for an Internet e-mail address to be looked up
1526 void directory_key(char *key, char *addr) {
1530 for (i=0; !IsEmptyStr(&addr[i]); ++i) {
1531 if (!isspace(addr[i])) {
1532 key[keylen++] = tolower(addr[i]);
1537 syslog(LOG_DEBUG, "Directory key is <%s>\n", key);
1542 /* Return nonzero if the supplied address is in a domain we keep in
1545 int IsDirectory(char *addr, int allow_masq_domains) {
1549 extract_token(domain, addr, 1, '@', sizeof domain);
1552 h = CtdlHostAlias(domain);
1554 if ( (h == hostalias_masq) && allow_masq_domains)
1557 if ( (h == hostalias_localhost) || (h == hostalias_directory) ) {
1567 * Initialize the directory database (erasing anything already there)
1569 void CtdlDirectoryInit(void) {
1570 cdb_trunc(CDB_DIRECTORY);
1575 * Add an Internet e-mail address to the directory for a user
1577 int CtdlDirectoryAddUser(char *internet_addr, char *citadel_addr) {
1580 if (IsDirectory(internet_addr, 0) == 0)
1582 syslog(LOG_DEBUG, "Create directory entry: %s --> %s\n", internet_addr, citadel_addr);
1583 directory_key(key, internet_addr);
1584 cdb_store(CDB_DIRECTORY, key, strlen(key), citadel_addr, strlen(citadel_addr)+1 );
1590 * Delete an Internet e-mail address from the directory.
1592 * (NOTE: we don't actually use or need the citadel_addr variable; it's merely
1593 * here because the callback API expects to be able to send it.)
1595 int CtdlDirectoryDelUser(char *internet_addr, char *citadel_addr) {
1598 syslog(LOG_DEBUG, "Delete directory entry: %s --> %s\n", internet_addr, citadel_addr);
1599 directory_key(key, internet_addr);
1600 return cdb_delete(CDB_DIRECTORY, key, strlen(key) ) == 0;
1605 * Look up an Internet e-mail address in the directory.
1606 * On success: returns 0, and Citadel address stored in 'target'
1607 * On failure: returns nonzero
1609 int CtdlDirectoryLookup(char *target, char *internet_addr, size_t targbuflen) {
1610 struct cdbdata *cdbrec;
1613 /* Dump it in there unchanged, just for kicks */
1614 safestrncpy(target, internet_addr, targbuflen);
1616 /* Only do lookups for addresses with hostnames in them */
1617 if (num_tokens(internet_addr, '@') != 2) return(-1);
1619 /* Only do lookups for domains in the directory */
1620 if (IsDirectory(internet_addr, 0) == 0) return(-1);
1622 directory_key(key, internet_addr);
1623 cdbrec = cdb_fetch(CDB_DIRECTORY, key, strlen(key) );
1624 if (cdbrec != NULL) {
1625 safestrncpy(target, cdbrec->ptr, targbuflen);
1635 * Harvest any email addresses that someone might want to have in their
1636 * "collected addresses" book.
1638 char *harvest_collected_addresses(struct CtdlMessage *msg) {
1641 char user[256], node[256], name[256];
1644 eMsgField field = 0;
1646 if (msg == NULL) return(NULL);
1650 if (!CM_IsEmpty(msg, eAuthor)) {
1651 strcat(addr, msg->cm_fields[eAuthor]);
1653 if (!CM_IsEmpty(msg, erFc822Addr)) {
1655 strcat(addr, msg->cm_fields[erFc822Addr]);
1657 if (IsDirectory(msg->cm_fields[erFc822Addr], 0)) {
1662 if (is_harvestable) {
1663 coll = strdup(addr);
1669 if (coll == NULL) return(NULL);
1671 /* Scan both the R (To) and Y (CC) fields */
1672 for (i = 0; i < 2; ++i) {
1673 if (i == 0) field = eRecipient;
1674 if (i == 1) field = eCarbonCopY;
1676 if (!CM_IsEmpty(msg, field)) {
1677 for (j=0; j<num_tokens(msg->cm_fields[field], ','); ++j) {
1678 extract_token(addr, msg->cm_fields[field], j, ',', sizeof addr);
1679 if (strstr(addr, "=?") != NULL)
1680 utf8ify_rfc822_string(addr);
1681 process_rfc822_addr(addr, user, node, name);
1682 h = CtdlHostAlias(node);
1683 if ( (h != hostalias_localhost) && (h != hostalias_directory) ) {
1684 coll = realloc(coll, strlen(coll) + strlen(addr) + 4);
1685 if (coll == NULL) return(NULL);
1686 if (!IsEmptyStr(coll)) {
1696 if (IsEmptyStr(coll)) {