2 * This file contains functions which handle the mapping of Internet addresses
3 * to users on the Citadel system.
5 * Copyright (c) 1987-2019 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 */
411 char original_name[256];
412 safestrncpy(original_name, name, sizeof original_name);
415 remove_any_whitespace_to_the_left_or_right_of_at_symbol(name);
416 stripallbut(name, '<', '>');
418 /* Hit the email address directory */
419 if (CtdlDirectoryLookup(aaa, name, sizeof aaa) == 0) {
423 if (strcasecmp(original_name, name)) {
424 syslog(LOG_INFO, "internet_addressing: %s is being forwarded to %s", original_name, name);
427 /* Change "user @ xxx" to "user" if xxx is an alias for this host */
428 for (a=0; name[a] != '\0'; ++a) {
429 if (name[a] == '@') {
430 if (CtdlHostAlias(&name[a+1]) == hostalias_localhost) {
432 syslog(LOG_DEBUG, "internet_addressing: changed to <%s>", name);
438 /* determine local or remote type, see citadel.h */
439 at = haschar(name, '@');
440 if (at == 0) return(MES_LOCAL); /* no @'s - local address */
441 if (at > 1) return(MES_ERROR); /* >1 @'s - invalid address */
442 remove_any_whitespace_to_the_left_or_right_of_at_symbol(name);
444 /* figure out the delivery mode */
445 extract_token(node, name, 1, '@', sizeof node);
447 /* If there are one or more dots in the nodename, we assume that it
448 * is an FQDN and will attempt SMTP delivery to the Internet.
450 if (haschar(node, '.') > 0) {
451 return(MES_INTERNET);
454 /* If we get to this point it's an invalid node name */
460 * Validate recipients, count delivery types and errors, and handle aliasing
461 * FIXME check for dupes!!!!!
463 * Returns 0 if all addresses are ok, ret->num_error = -1 if no addresses
464 * were specified, or the number of addresses found invalid.
466 * Caller needs to free the result using free_recipients()
468 recptypes *validate_recipients(const char *supplied_recipients, const char *RemoteIdentifier, int Flags)
470 struct CitContext *CCC = CC;
472 char *recipients = NULL;
475 char this_recp_cooked[256];
482 struct ctdluser tempUS;
483 struct ctdlroom tempQR;
484 struct ctdlroom tempQR2;
490 ret = (recptypes *) malloc(sizeof(recptypes));
491 if (ret == NULL) return(NULL);
493 /* Set all strings to null and numeric values to zero */
494 memset(ret, 0, sizeof(recptypes));
496 if (supplied_recipients == NULL) {
497 recipients = strdup("");
500 recipients = strdup(supplied_recipients);
503 /* Allocate some memory. Yes, this allocates 500% more memory than we will
504 * actually need, but it's healthier for the heap than doing lots of tiny
505 * realloc() calls instead.
507 len = strlen(recipients) + 1024;
508 ret->errormsg = malloc(len);
509 ret->recp_local = malloc(len);
510 ret->recp_internet = malloc(len);
511 ret->recp_room = malloc(len);
512 ret->display_recp = malloc(len);
513 ret->recp_orgroom = malloc(len);
514 org_recp = malloc(len);
516 ret->errormsg[0] = 0;
517 ret->recp_local[0] = 0;
518 ret->recp_internet[0] = 0;
519 ret->recp_room[0] = 0;
520 ret->recp_orgroom[0] = 0;
521 ret->display_recp[0] = 0;
523 ret->recptypes_magic = RECPTYPES_MAGIC;
525 /* Change all valid separator characters to commas */
526 for (i=0; !IsEmptyStr(&recipients[i]); ++i) {
527 if ((recipients[i] == ';') || (recipients[i] == '|')) {
532 /* Now start extracting recipients... */
534 while (!IsEmptyStr(recipients)) {
535 for (i=0; i<=strlen(recipients); ++i) {
536 if (recipients[i] == '\"') in_quotes = 1 - in_quotes;
537 if ( ( (recipients[i] == ',') && (!in_quotes) ) || (recipients[i] == 0) ) {
538 safestrncpy(this_recp, recipients, i+1);
540 if (recipients[i] == ',') {
541 strcpy(recipients, &recipients[i+1]);
544 strcpy(recipients, "");
551 if (IsEmptyStr(this_recp))
553 syslog(LOG_DEBUG, "internet_addressing: evaluating recipient #%d: %s", num_recps, this_recp);
556 strcpy(org_recp, this_recp);
559 mailtype = alias(this_recp);
561 for (j = 0; !IsEmptyStr(&this_recp[j]); ++j) {
562 if (this_recp[j]=='_') {
563 this_recp_cooked[j] = ' ';
566 this_recp_cooked[j] = this_recp[j];
569 this_recp_cooked[j] = '\0';
574 if (!strcasecmp(this_recp, "sysop")) {
576 strcpy(this_recp, CtdlGetConfigStr("c_aideroom"));
577 if (!IsEmptyStr(ret->recp_room)) {
578 strcat(ret->recp_room, "|");
580 strcat(ret->recp_room, this_recp);
582 else if ( (!strncasecmp(this_recp, "room_", 5))
583 && (!CtdlGetRoom(&tempQR, &this_recp_cooked[5])) ) {
585 /* Save room so we can restore it later */
589 /* Check permissions to send mail to this room */
590 err = CtdlDoIHavePermissionToPostInThisRoom(
595 0 /* 0 = not a reply */
604 if (!IsEmptyStr(ret->recp_room)) {
605 strcat(ret->recp_room, "|");
607 strcat(ret->recp_room, &this_recp_cooked[5]);
609 if (!IsEmptyStr(ret->recp_orgroom)) {
610 strcat(ret->recp_orgroom, "|");
612 strcat(ret->recp_orgroom, org_recp);
616 /* Restore room in case something needs it */
620 else if (CtdlGetUser(&tempUS, this_recp) == 0) {
622 strcpy(this_recp, tempUS.fullname);
623 if (!IsEmptyStr(ret->recp_local)) {
624 strcat(ret->recp_local, "|");
626 strcat(ret->recp_local, this_recp);
628 else if (CtdlGetUser(&tempUS, this_recp_cooked) == 0) {
630 strcpy(this_recp, tempUS.fullname);
631 if (!IsEmptyStr(ret->recp_local)) {
632 strcat(ret->recp_local, "|");
634 strcat(ret->recp_local, this_recp);
642 /* Yes, you're reading this correctly: if the target
643 * domain points back to the local system,
644 * the address is invalid. That's
645 * because if the address were valid, we would have
646 * already translated it to a local address by now.
648 if (IsDirectory(this_recp, 0)) {
654 if (!IsEmptyStr(ret->recp_internet)) {
655 strcat(ret->recp_internet, "|");
657 strcat(ret->recp_internet, this_recp);
666 if (IsEmptyStr(errmsg)) {
667 snprintf(append, sizeof append, "Invalid recipient: %s", this_recp);
670 snprintf(append, sizeof append, "%s", errmsg);
672 if ( (strlen(ret->errormsg) + strlen(append) + 3) < SIZ) {
673 if (!IsEmptyStr(ret->errormsg)) {
674 strcat(ret->errormsg, "; ");
676 strcat(ret->errormsg, append);
680 if (IsEmptyStr(ret->display_recp)) {
681 strcpy(append, this_recp);
684 snprintf(append, sizeof append, ", %s", this_recp);
686 if ( (strlen(ret->display_recp)+strlen(append)) < SIZ) {
687 strcat(ret->display_recp, append);
693 if ( (ret->num_local + ret->num_internet + ret->num_room + ret->num_error) == 0)
695 ret->num_error = (-1);
696 strcpy(ret->errormsg, "No recipients specified.");
699 syslog(LOG_DEBUG, "internet_addressing: validate_recipients() = %d local, %d room, %d SMTP, %d error",
700 ret->num_local, ret->num_room, ret->num_internet, ret->num_error
709 * Destructor for recptypes
711 void free_recipients(recptypes *valid) {
717 if (valid->recptypes_magic != RECPTYPES_MAGIC) {
718 syslog(LOG_ERR, "internet_addressing: attempt to call free_recipients() on some other data type!");
722 if (valid->errormsg != NULL) free(valid->errormsg);
723 if (valid->recp_local != NULL) free(valid->recp_local);
724 if (valid->recp_internet != NULL) free(valid->recp_internet);
725 if (valid->recp_room != NULL) free(valid->recp_room);
726 if (valid->recp_orgroom != NULL) free(valid->recp_orgroom);
727 if (valid->display_recp != NULL) free(valid->display_recp);
728 if (valid->bounce_to != NULL) free(valid->bounce_to);
729 if (valid->envelope_from != NULL) free(valid->envelope_from);
730 if (valid->sending_room != NULL) free(valid->sending_room);
735 char *qp_encode_email_addrs(char *source)
737 char *user, *node, *name;
738 const char headerStr[] = "=?UTF-8?Q?";
742 int need_to_encode = 0;
748 long nAddrPtrMax = 50;
753 if (source == NULL) return source;
754 if (IsEmptyStr(source)) return source;
755 syslog(LOG_DEBUG, "internet_addressing: qp_encode_email_addrs <%s>", source);
757 AddrPtr = malloc (sizeof (long) * nAddrPtrMax);
758 AddrUtf8 = malloc (sizeof (long) * nAddrPtrMax);
759 memset(AddrUtf8, 0, sizeof (long) * nAddrPtrMax);
762 while (!IsEmptyStr (&source[i])) {
763 if (nColons >= nAddrPtrMax){
766 ptr = (long *) malloc(sizeof (long) * nAddrPtrMax * 2);
767 memcpy (ptr, AddrPtr, sizeof (long) * nAddrPtrMax);
768 free (AddrPtr), AddrPtr = ptr;
770 ptr = (long *) malloc(sizeof (long) * nAddrPtrMax * 2);
771 memset(&ptr[nAddrPtrMax], 0,
772 sizeof (long) * nAddrPtrMax);
774 memcpy (ptr, AddrUtf8, sizeof (long) * nAddrPtrMax);
775 free (AddrUtf8), AddrUtf8 = ptr;
778 if (((unsigned char) source[i] < 32) ||
779 ((unsigned char) source[i] > 126)) {
781 AddrUtf8[nColons] = 1;
783 if (source[i] == '"')
784 InQuotes = !InQuotes;
785 if (!InQuotes && source[i] == ',') {
786 AddrPtr[nColons] = i;
791 if (need_to_encode == 0) {
798 EncodedMaxLen = nColons * (sizeof(headerStr) + 3) + SourceLen * 3;
799 Encoded = (char*) malloc (EncodedMaxLen);
801 for (i = 0; i < nColons; i++) {
802 source[AddrPtr[i]++] = '\0';
804 /* TODO: if libidn, this might get larger*/
805 user = malloc(SourceLen + 1);
806 node = malloc(SourceLen + 1);
807 name = malloc(SourceLen + 1);
811 for (i = 0; i < nColons && nPtr != NULL; i++) {
812 nmax = EncodedMaxLen - (nPtr - Encoded);
814 process_rfc822_addr(&source[AddrPtr[i]],
818 /* TODO: libIDN here ! */
819 if (IsEmptyStr(name)) {
820 n = snprintf(nPtr, nmax,
821 (i==0)?"%s@%s" : ",%s@%s",
825 EncodedName = rfc2047encode(name, strlen(name));
826 n = snprintf(nPtr, nmax,
827 (i==0)?"%s <%s@%s>" : ",%s <%s@%s>",
828 EncodedName, user, node);
833 n = snprintf(nPtr, nmax,
835 &source[AddrPtr[i]]);
841 ptr = (char*) malloc(EncodedMaxLen * 2);
842 memcpy(ptr, Encoded, EncodedMaxLen);
843 nnPtr = ptr + (nPtr - Encoded), nPtr = nnPtr;
844 free(Encoded), Encoded = ptr;
846 i--; /* do it once more with properly lengthened buffer */
849 for (i = 0; i < nColons; i++)
850 source[--AddrPtr[i]] = ',';
862 * Unfold a multi-line field into a single line, removing multi-whitespaces
864 void unfold_rfc822_field(char **field, char **FieldEnd)
867 char *pField = *field;
869 char *pFieldEnd = *FieldEnd;
871 while (isspace(*pField))
873 /* remove leading/trailing whitespace */
876 while (isspace(*pFieldEnd))
879 *FieldEnd = pFieldEnd;
880 /* convert non-space whitespace to spaces, and remove double blanks */
881 for (sField = *field = pField;
885 if ((*sField=='\r') || (*sField=='\n'))
888 while (((*(sField + Offset) == '\r') ||
889 (*(sField + Offset) == '\n') ||
890 (isspace(*(sField + Offset)))) &&
891 (sField + Offset < pFieldEnd))
897 if (*sField=='\"') quote = 1 - quote;
899 if (isspace(*sField))
905 while ((sField < pFieldEnd) &&
910 else *pField = *sField;
912 else *pField = *sField;
916 *FieldEnd = pField - 1;
921 * Split an RFC822-style address into userid, host, and full name
924 void process_rfc822_addr(const char *rfc822, char *user, char *node, char *name)
929 strcpy(node, CtdlGetConfigStr("c_fqdn"));
932 if (rfc822 == NULL) return;
934 /* extract full name - first, it's From minus <userid> */
935 strcpy(name, rfc822);
936 stripout(name, '<', '>');
938 /* strip anything to the left of a bang */
939 while ((!IsEmptyStr(name)) && (haschar(name, '!') > 0))
940 strcpy(name, &name[1]);
942 /* and anything to the right of a @ or % */
943 for (a = 0; name[a] != '\0'; ++a) {
944 if (name[a] == '@') {
948 if (name[a] == '%') {
954 /* but if there are parentheses, that changes the rules... */
955 if ((haschar(rfc822, '(') == 1) && (haschar(rfc822, ')') == 1)) {
956 strcpy(name, rfc822);
957 stripallbut(name, '(', ')');
960 /* but if there are a set of quotes, that supersedes everything */
961 if (haschar(rfc822, 34) == 2) {
962 strcpy(name, rfc822);
963 while ((!IsEmptyStr(name)) && (name[0] != 34)) {
964 strcpy(&name[0], &name[1]);
966 strcpy(&name[0], &name[1]);
967 for (a = 0; name[a] != '\0'; ++a)
973 /* extract user id */
974 strcpy(user, rfc822);
976 /* first get rid of anything in parens */
977 stripout(user, '(', ')');
979 /* if there's a set of angle brackets, strip it down to that */
980 if ((haschar(user, '<') == 1) && (haschar(user, '>') == 1)) {
981 stripallbut(user, '<', '>');
984 /* strip anything to the left of a bang */
985 while ((!IsEmptyStr(user)) && (haschar(user, '!') > 0))
986 strcpy(user, &user[1]);
988 /* and anything to the right of a @ or % */
989 for (a = 0; user[a] != '\0'; ++a) {
990 if (user[a] == '@') {
994 if (user[a] == '%') {
1001 /* extract node name */
1002 strcpy(node, rfc822);
1004 /* first get rid of anything in parens */
1005 stripout(node, '(', ')');
1007 /* if there's a set of angle brackets, strip it down to that */
1008 if ((haschar(node, '<') == 1) && (haschar(node, '>') == 1)) {
1009 stripallbut(node, '<', '>');
1012 /* If no node specified, tack ours on instead */
1014 (haschar(node, '@')==0)
1015 && (haschar(node, '%')==0)
1016 && (haschar(node, '!')==0)
1018 strcpy(node, CtdlGetConfigStr("c_nodename"));
1023 /* strip anything to the left of a @ */
1024 while ((!IsEmptyStr(node)) && (haschar(node, '@') > 0))
1025 strcpy(node, &node[1]);
1027 /* strip anything to the left of a % */
1028 while ((!IsEmptyStr(node)) && (haschar(node, '%') > 0))
1029 strcpy(node, &node[1]);
1031 /* reduce multiple system bang paths to node!user */
1032 while ((!IsEmptyStr(node)) && (haschar(node, '!') > 1))
1033 strcpy(node, &node[1]);
1035 /* now get rid of the user portion of a node!user string */
1036 for (a = 0; node[a] != '\0'; ++a)
1037 if (node[a] == '!') {
1043 /* strip leading and trailing spaces in all strings */
1048 /* If we processed a string that had the address in angle brackets
1049 * but no name outside the brackets, we now have an empty name. In
1050 * this case, use the user portion of the address as the name.
1052 if ((IsEmptyStr(name)) && (!IsEmptyStr(user))) {
1059 * convert_field() is a helper function for convert_internet_message().
1060 * Given start/end positions for an rfc822 field, it converts it to a Citadel
1061 * field if it wants to, and unfolds it if necessary.
1063 * Returns 1 if the field was converted and inserted into the Citadel message
1064 * structure, implying that the source field should be removed from the
1067 int convert_field(struct CtdlMessage *msg, const char *beg, const char *end) {
1068 char *key, *value, *valueend;
1072 const char *colonpos = NULL;
1081 for (pos = end; pos >= beg; pos--) {
1082 if (*pos == ':') colonpos = pos;
1085 if (colonpos == NULL) return(0); /* no colon? not a valid header line */
1088 key = malloc(len + 2);
1089 memcpy(key, beg, len + 1);
1091 valueend = key + len;
1092 * ( key + (colonpos - beg) ) = '\0';
1093 value = &key[(colonpos - beg) + 1];
1094 /* printf("Header: [%s]\nValue: [%s]\n", key, value); */
1095 unfold_rfc822_field(&value, &valueend);
1096 valuelen = valueend - value + 1;
1097 /* printf("UnfoldedValue: [%s]\n", value); */
1100 * Here's the big rfc822-to-citadel loop.
1103 /* Date/time is converted into a unix timestamp. If the conversion
1104 * fails, we replace it with the time the message arrived locally.
1106 if (!strcasecmp(key, "Date")) {
1107 parsed_date = parsedate(value);
1108 if (parsed_date < 0L) parsed_date = time(NULL);
1110 if (CM_IsEmpty(msg, eTimestamp))
1111 CM_SetFieldLONG(msg, eTimestamp, parsed_date);
1115 else if (!strcasecmp(key, "From")) {
1116 process_rfc822_addr(value, user, node, name);
1117 syslog(LOG_DEBUG, "internet_addressing: converted to <%s@%s> (%s)", user, node, name);
1118 snprintf(addr, sizeof(addr), "%s@%s", user, node);
1119 if (CM_IsEmpty(msg, eAuthor) && !IsEmptyStr(name))
1120 CM_SetField(msg, eAuthor, name, strlen(name));
1121 if (CM_IsEmpty(msg, erFc822Addr) && !IsEmptyStr(addr))
1122 CM_SetField(msg, erFc822Addr, addr, strlen(addr));
1126 else if (!strcasecmp(key, "Subject")) {
1127 if (CM_IsEmpty(msg, eMsgSubject))
1128 CM_SetField(msg, eMsgSubject, value, valuelen);
1132 else if (!strcasecmp(key, "List-ID")) {
1133 if (CM_IsEmpty(msg, eListID))
1134 CM_SetField(msg, eListID, value, valuelen);
1138 else if (!strcasecmp(key, "To")) {
1139 if (CM_IsEmpty(msg, eRecipient))
1140 CM_SetField(msg, eRecipient, value, valuelen);
1144 else if (!strcasecmp(key, "CC")) {
1145 if (CM_IsEmpty(msg, eCarbonCopY))
1146 CM_SetField(msg, eCarbonCopY, value, valuelen);
1150 else if (!strcasecmp(key, "Message-ID")) {
1151 if (!CM_IsEmpty(msg, emessageId)) {
1152 syslog(LOG_WARNING, "internet_addressing: duplicate message id");
1159 pValueLen = valuelen;
1160 /* Strip angle brackets */
1161 while (haschar(pValue, '<') > 0) {
1166 for (i = 0; i <= pValueLen; ++i)
1167 if (pValue[i] == '>') {
1172 CM_SetField(msg, emessageId, pValue, pValueLen);
1178 else if (!strcasecmp(key, "Return-Path")) {
1179 if (CM_IsEmpty(msg, eMessagePath))
1180 CM_SetField(msg, eMessagePath, value, valuelen);
1184 else if (!strcasecmp(key, "Envelope-To")) {
1185 if (CM_IsEmpty(msg, eenVelopeTo))
1186 CM_SetField(msg, eenVelopeTo, value, valuelen);
1190 else if (!strcasecmp(key, "References")) {
1191 CM_SetField(msg, eWeferences, value, valuelen);
1195 else if (!strcasecmp(key, "Reply-To")) {
1196 CM_SetField(msg, eReplyTo, value, valuelen);
1200 else if (!strcasecmp(key, "In-reply-to")) {
1201 if (CM_IsEmpty(msg, eWeferences)) /* References: supersedes In-reply-to: */
1202 CM_SetField(msg, eWeferences, value, valuelen);
1208 /* Clean up and move on. */
1209 free(key); /* Don't free 'value', it's actually the same buffer */
1215 * Convert RFC822 references format (References) to Citadel references format (Weferences)
1217 void convert_references_to_wefewences(char *str) {
1218 int bracket_nesting = 0;
1220 char *moveptr = NULL;
1227 if (bracket_nesting < 0) bracket_nesting = 0;
1229 if ((ch == '>') && (bracket_nesting == 0) && (*(ptr+1)) && (ptr>str) ) {
1233 else if (bracket_nesting > 0) {
1239 *moveptr = *(moveptr+1);
1243 if (ch == '<') ++bracket_nesting;
1250 * Convert an RFC822 message (headers + body) to a CtdlMessage structure.
1251 * NOTE: the supplied buffer becomes part of the CtdlMessage structure, and
1252 * will be deallocated when CM_Free() is called. Therefore, the
1253 * supplied buffer should be DEREFERENCED. It should not be freed or used
1256 struct CtdlMessage *convert_internet_message(char *rfc822) {
1257 StrBuf *RFCBuf = NewStrBufPlain(rfc822, -1);
1259 return convert_internet_message_buf(&RFCBuf);
1263 struct CtdlMessage *convert_internet_message_buf(StrBuf **rfc822)
1265 struct CtdlMessage *msg;
1266 const char *pos, *beg, *end, *totalend;
1267 int done, alldone = 0;
1269 StrBuf *OtherHeaders;
1271 msg = malloc(sizeof(struct CtdlMessage));
1272 if (msg == NULL) return msg;
1274 memset(msg, 0, sizeof(struct CtdlMessage));
1275 msg->cm_magic = CTDLMESSAGE_MAGIC; /* self check */
1276 msg->cm_anon_type = 0; /* never anonymous */
1277 msg->cm_format_type = FMT_RFC822; /* internet message */
1279 pos = ChrPtr(*rfc822);
1280 totalend = pos + StrLength(*rfc822);
1282 OtherHeaders = NewStrBufPlain(NULL, StrLength(*rfc822));
1286 /* Locate beginning and end of field, keeping in mind that
1287 * some fields might be multiline
1291 while ((end < totalend) &&
1296 if ( (*pos=='\n') && ((*(pos+1))!=0x20) && ((*(pos+1))!=0x09) )
1301 /* done with headers? */
1303 ( (*(pos+1)=='\n') ||
1309 if (pos >= (totalend - 1) )
1319 /* At this point we have a field. Are we interested in it? */
1320 converted = convert_field(msg, beg, end);
1322 /* Strip the field out of the RFC822 header if we used it */
1324 StrBufAppendBufPlain(OtherHeaders, beg, end - beg, 0);
1325 StrBufAppendBufPlain(OtherHeaders, HKEY("\n"), 0);
1328 /* If we've hit the end of the message, bail out */
1329 if (pos >= totalend)
1332 StrBufAppendBufPlain(OtherHeaders, HKEY("\n"), 0);
1334 StrBufAppendBufPlain(OtherHeaders, pos, totalend - pos, 0);
1336 CM_SetAsFieldSB(msg, eMesageText, &OtherHeaders);
1338 /* Follow-up sanity checks... */
1340 /* If there's no timestamp on this message, set it to now. */
1341 if (CM_IsEmpty(msg, eTimestamp)) {
1342 CM_SetFieldLONG(msg, eTimestamp, time(NULL));
1345 /* If a W (references, or rather, Wefewences) field is present, we
1346 * have to convert it from RFC822 format to Citadel format.
1348 if (!CM_IsEmpty(msg, eWeferences)) {
1350 convert_references_to_wefewences(msg->cm_fields[eWeferences]);
1358 * Look for a particular header field in an RFC822 message text. If the
1359 * requested field is found, it is unfolded (if necessary) and returned to
1360 * the caller. The field name is stripped out, leaving only its contents.
1361 * The caller is responsible for freeing the returned buffer. If the requested
1362 * field is not present, or anything else goes wrong, it returns NULL.
1364 char *rfc822_fetch_field(const char *rfc822, const char *fieldname) {
1365 char *fieldbuf = NULL;
1366 const char *end_of_headers;
1367 const char *field_start;
1372 /* Should never happen, but sometimes we get stupid */
1373 if (rfc822 == NULL) return(NULL);
1374 if (fieldname == NULL) return(NULL);
1376 snprintf(fieldhdr, sizeof fieldhdr, "%s:", fieldname);
1378 /* Locate the end of the headers, so we don't run past that point */
1379 end_of_headers = cbmstrcasestr(rfc822, "\n\r\n");
1380 if (end_of_headers == NULL) {
1381 end_of_headers = cbmstrcasestr(rfc822, "\n\n");
1383 if (end_of_headers == NULL) return (NULL);
1385 field_start = cbmstrcasestr(rfc822, fieldhdr);
1386 if (field_start == NULL) return(NULL);
1387 if (field_start > end_of_headers) return(NULL);
1389 fieldbuf = malloc(SIZ);
1390 strcpy(fieldbuf, "");
1393 ptr = cmemreadline(ptr, fieldbuf, SIZ-strlen(fieldbuf) );
1394 while ( (isspace(ptr[0])) && (ptr < end_of_headers) ) {
1395 strcat(fieldbuf, " ");
1396 cont = &fieldbuf[strlen(fieldbuf)];
1397 ptr = cmemreadline(ptr, cont, SIZ-strlen(fieldbuf) );
1401 strcpy(fieldbuf, &fieldbuf[strlen(fieldhdr)]);
1408 /*****************************************************************************
1409 * DIRECTORY MANAGEMENT FUNCTIONS *
1410 *****************************************************************************/
1413 * Generate the index key for an Internet e-mail address to be looked up
1416 void directory_key(char *key, char *addr) {
1420 for (i=0; !IsEmptyStr(&addr[i]); ++i) {
1421 if (!isspace(addr[i])) {
1422 key[keylen++] = tolower(addr[i]);
1427 syslog(LOG_DEBUG, "internet_addressing: directory key is <%s>", key);
1431 /* Return nonzero if the supplied address is in one of "our" domains
1433 int IsDirectory(char *addr, int allow_masq_domains) {
1437 extract_token(domain, addr, 1, '@', sizeof domain);
1440 h = CtdlHostAlias(domain);
1442 if ( (h == hostalias_masq) && allow_masq_domains)
1445 if (h == hostalias_localhost) {
1455 * Add an Internet e-mail address to the directory for a user
1457 int CtdlDirectoryAddUser(char *internet_addr, char *citadel_addr) {
1460 if (IsDirectory(internet_addr, 0) == 0) {
1463 syslog(LOG_DEBUG, "internet_addressing: create directory entry: %s --> %s", internet_addr, citadel_addr);
1464 directory_key(key, internet_addr);
1465 cdb_store(CDB_DIRECTORY, key, strlen(key), citadel_addr, strlen(citadel_addr)+1 );
1471 * Delete an Internet e-mail address from the directory.
1473 * (NOTE: we don't actually use or need the citadel_addr variable; it's merely
1474 * here because the callback API expects to be able to send it.)
1476 int CtdlDirectoryDelUser(char *internet_addr, char *citadel_addr) {
1479 syslog(LOG_DEBUG, "internet_addressing: delete directory entry: %s --> %s", internet_addr, citadel_addr);
1480 directory_key(key, internet_addr);
1481 return cdb_delete(CDB_DIRECTORY, key, strlen(key) ) == 0;
1486 * Look up an Internet e-mail address in the directory.
1487 * On success: returns 0, and Citadel address stored in 'target'
1488 * On failure: returns nonzero
1490 int CtdlDirectoryLookup(char *target, char *internet_addr, size_t targbuflen) {
1491 struct cdbdata *cdbrec;
1494 /* Dump it in there unchanged, just for kicks */
1495 if (target != NULL) {
1496 safestrncpy(target, internet_addr, targbuflen);
1499 /* Only do lookups for addresses with hostnames in them */
1500 if (num_tokens(internet_addr, '@') != 2) return(-1);
1502 /* Only do lookups for domains in the directory */
1503 if (IsDirectory(internet_addr, 0) == 0) return(-1);
1505 directory_key(key, internet_addr);
1506 cdbrec = cdb_fetch(CDB_DIRECTORY, key, strlen(key) );
1507 if (cdbrec != NULL) {
1508 if (target != NULL) {
1509 safestrncpy(target, cdbrec->ptr, targbuflen);
1520 * Harvest any email addresses that someone might want to have in their
1521 * "collected addresses" book.
1523 char *harvest_collected_addresses(struct CtdlMessage *msg) {
1526 char user[256], node[256], name[256];
1529 eMsgField field = 0;
1531 if (msg == NULL) return(NULL);
1535 if (!CM_IsEmpty(msg, eAuthor)) {
1536 strcat(addr, msg->cm_fields[eAuthor]);
1538 if (!CM_IsEmpty(msg, erFc822Addr)) {
1540 strcat(addr, msg->cm_fields[erFc822Addr]);
1542 if (IsDirectory(msg->cm_fields[erFc822Addr], 0)) {
1547 if (is_harvestable) {
1548 coll = strdup(addr);
1554 if (coll == NULL) return(NULL);
1556 /* Scan both the R (To) and Y (CC) fields */
1557 for (i = 0; i < 2; ++i) {
1558 if (i == 0) field = eRecipient;
1559 if (i == 1) field = eCarbonCopY;
1561 if (!CM_IsEmpty(msg, field)) {
1562 for (j=0; j<num_tokens(msg->cm_fields[field], ','); ++j) {
1563 extract_token(addr, msg->cm_fields[field], j, ',', sizeof addr);
1564 if (strstr(addr, "=?") != NULL)
1565 utf8ify_rfc822_string(addr);
1566 process_rfc822_addr(addr, user, node, name);
1567 h = CtdlHostAlias(node);
1568 if (h != hostalias_localhost) {
1569 coll = realloc(coll, strlen(coll) + strlen(addr) + 4);
1570 if (coll == NULL) return(NULL);
1571 if (!IsEmptyStr(coll)) {
1581 if (IsEmptyStr(coll)) {
1590 * Helper function for CtdlRebuildDirectoryIndex()
1592 void CtdlRebuildDirectoryIndex_backend(char *username, void *data) {
1595 struct ctdluser usbuf;
1597 if (CtdlGetUser(&usbuf, username) != 0) {
1601 if ( (!IsEmptyStr(usbuf.fullname)) && (!IsEmptyStr(usbuf.emailaddrs)) ) {
1602 for (j=0; j<num_tokens(usbuf.emailaddrs, '|'); ++j) {
1603 char one_email[512];
1604 extract_token(one_email, usbuf.emailaddrs, j, '|', sizeof one_email);
1605 CtdlDirectoryAddUser(one_email, usbuf.fullname);
1612 * Initialize the directory database (erasing anything already there)
1614 void CtdlRebuildDirectoryIndex(void) {
1615 syslog(LOG_INFO, "internet_addressing: rebuilding email address directory index");
1616 cdb_trunc(CDB_DIRECTORY);
1617 ForEachUser(CtdlRebuildDirectoryIndex_backend, NULL);
1622 * Configure Internet email addresses for a user account, updating the Directory Index in the process
1624 void CtdlSetEmailAddressesForUser(char *requested_user, char *new_emailaddrs)
1626 struct ctdluser usbuf;
1630 if (CtdlGetUserLock(&usbuf, requested_user) != 0) { // We are relying on the fact that the DirectoryIndex functions don't lock.
1631 return; // Silently fail here if we can't acquire a lock on the user record.
1634 syslog(LOG_DEBUG, "internet_addressing: setting email addresses for <%s> to <%s>", usbuf.fullname, new_emailaddrs);
1636 /* Delete all of the existing directory index records for the user (easier this way) */
1637 for (i=0; i<num_tokens(usbuf.emailaddrs, '|'); ++i) {
1638 extract_token(buf, usbuf.emailaddrs, i, '|', sizeof buf);
1639 CtdlDirectoryDelUser(buf, requested_user);
1642 strcpy(usbuf.emailaddrs, new_emailaddrs); // make it official.
1644 /* Index all of the new email addresses (they've already been sanitized) */
1645 for (i=0; i<num_tokens(usbuf.emailaddrs, '|'); ++i) {
1646 extract_token(buf, usbuf.emailaddrs, i, '|', sizeof buf);
1647 CtdlDirectoryAddUser(buf, requested_user);
1650 CtdlPutUserLock(&usbuf);
1655 * Auto-generate an Internet email address for a user account
1657 void AutoGenerateEmailAddressForUser(struct ctdluser *user)
1659 char synthetic_email_addr[1024];
1663 for (i=0; u==0; ++i) {
1665 // first try just converting the user name to lowercase and replacing spaces with underscores
1666 snprintf(synthetic_email_addr, sizeof synthetic_email_addr, "%s@%s", user->fullname, CtdlGetConfigStr("c_fqdn"));
1667 for (j=0; ((synthetic_email_addr[j] != '\0')&&(synthetic_email_addr[j] != '@')); j++) {
1668 synthetic_email_addr[j] = tolower(synthetic_email_addr[j]);
1669 if (!isalnum(synthetic_email_addr[j])) {
1670 synthetic_email_addr[j] = '_';
1675 // then try 'ctdl' followed by the user number
1676 snprintf(synthetic_email_addr, sizeof synthetic_email_addr, "ctdl%08lx@%s", user->usernum, CtdlGetConfigStr("c_fqdn"));
1679 // oof. just keep trying other numbers until we find one
1680 snprintf(synthetic_email_addr, sizeof synthetic_email_addr, "ctdl%08x@%s", i, CtdlGetConfigStr("c_fqdn"));
1682 u = CtdlDirectoryLookup(NULL, synthetic_email_addr, 0);
1685 CtdlSetEmailAddressesForUser(user->fullname, synthetic_email_addr);
1686 strncpy(CC->user.emailaddrs, synthetic_email_addr, sizeof(user->emailaddrs));
1687 syslog(LOG_DEBUG, "user_ops: auto-generated email address <%s> for <%s>", synthetic_email_addr, user->fullname);