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 it is needed for debugging */
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){};
277 char *inetcfg = NULL;
280 * Return nonzero if the supplied name is an alias for this host.
282 int CtdlHostAlias(char *fqdn) {
286 char host[256], type[256];
289 if (fqdn == NULL) return(hostalias_nomatch);
290 if (IsEmptyStr(fqdn)) return(hostalias_nomatch);
291 if (!strcasecmp(fqdn, "localhost")) return(hostalias_localhost);
292 if (!strcasecmp(fqdn, CtdlGetConfigStr("c_fqdn"))) return(hostalias_localhost);
293 if (!strcasecmp(fqdn, CtdlGetConfigStr("c_nodename"))) return(hostalias_localhost);
294 if (inetcfg == NULL) return(hostalias_nomatch);
296 config_lines = num_tokens(inetcfg, '\n');
297 for (i=0; i<config_lines; ++i) {
298 extract_token(buf, inetcfg, i, '\n', sizeof buf);
299 extract_token(host, buf, 0, '|', sizeof host);
300 extract_token(type, buf, 1, '|', sizeof type);
304 /* Process these in a specific order, in case there are multiple matches.
305 * We want localhost to override masq, for example.
308 if ( (!strcasecmp(type, "masqdomain")) && (!strcasecmp(fqdn, host))) {
309 found = hostalias_masq;
312 if ( (!strcasecmp(type, "localhost")) && (!strcasecmp(fqdn, host))) {
313 found = hostalias_localhost;
316 // "directory" used to be a distributed version of "localhost" but they're both the same now
317 if ( (!strcasecmp(type, "directory")) && (!strcasecmp(fqdn, host))) {
318 found = hostalias_localhost;
321 if (found) return(found);
323 return(hostalias_nomatch);
328 * Determine whether a given Internet address belongs to the current user
330 int CtdlIsMe(char *addr, int addr_buf_len)
335 recp = validate_recipients(addr, NULL, 0);
336 if (recp == NULL) return(0);
338 if (recp->num_local == 0) {
339 free_recipients(recp);
343 for (i=0; i<recp->num_local; ++i) {
344 extract_token(addr, recp->recp_local, i, '|', addr_buf_len);
345 if (!strcasecmp(addr, CC->user.fullname)) {
346 free_recipients(recp);
351 free_recipients(recp);
356 /* If the last item in a list of recipients was truncated to a partial address,
357 * remove it completely in order to avoid choking libSieve
359 void sanitize_truncated_recipient(char *str)
362 if (num_tokens(str, ',') < 2) return;
364 int len = strlen(str);
365 if (len < 900) return;
366 if (len > 998) str[998] = 0;
368 char *cptr = strrchr(str, ',');
371 char *lptr = strchr(cptr, '<');
372 char *rptr = strchr(cptr, '>');
374 if ( (lptr) && (rptr) && (rptr > lptr) ) return;
381 * This function is self explanatory.
382 * (What can I say, I'm in a weird mood today...)
384 void remove_any_whitespace_to_the_left_or_right_of_at_symbol(char *name)
388 for (i = 0; i < strlen(name); ++i) {
389 if (name[i] == '@') {
390 while (isspace(name[i - 1]) && i > 0) {
391 strcpy(&name[i - 1], &name[i]);
394 while (isspace(name[i + 1])) {
395 strcpy(&name[i + 1], &name[i + 2]);
403 * Aliasing for network mail.
405 int alias(char *name)
406 { /* process alias and routing info for mail */
409 char aaa[SIZ], bbb[SIZ];
410 char *ignetcfg = NULL;
411 char *ignetmap = NULL;
417 char original_name[256];
418 safestrncpy(original_name, name, sizeof original_name);
421 remove_any_whitespace_to_the_left_or_right_of_at_symbol(name);
422 stripallbut(name, '<', '>');
424 fp = fopen(file_mail_aliases, "r"); // when are we going to get rid of this?
426 fp = fopen("/dev/null", "r");
433 while (fgets(aaa, sizeof aaa, fp) != NULL) {
434 while (isspace(name[0]))
435 strcpy(name, &name[1]);
436 aaa[strlen(aaa) - 1] = 0;
438 for (a = 0; aaa[a] != '\0'; ++a) {
440 strcpy(bbb, &aaa[a + 1]);
445 if (!strcasecmp(name, aaa))
450 /* Hit the email address directory */
451 if (CtdlDirectoryLookup(aaa, name, sizeof aaa) == 0) {
455 if (strcasecmp(original_name, name)) {
456 syslog(LOG_INFO, "internet_addressing: %s is being forwarded to %s", original_name, name);
459 /* Change "user @ xxx" to "user" if xxx is an alias for this host */
460 for (a=0; name[a] != '\0'; ++a) {
461 if (name[a] == '@') {
462 if (CtdlHostAlias(&name[a+1]) == hostalias_localhost) {
464 syslog(LOG_DEBUG, "internet_addressing: changed to <%s>", name);
470 /* determine local or remote type, see citadel.h */
471 at = haschar(name, '@');
472 if (at == 0) return(MES_LOCAL); /* no @'s - local address */
473 if (at > 1) return(MES_ERROR); /* >1 @'s - invalid address */
474 remove_any_whitespace_to_the_left_or_right_of_at_symbol(name);
476 /* figure out the delivery mode */
477 extract_token(node, name, 1, '@', sizeof node);
479 /* If there are one or more dots in the nodename, we assume that it
480 * is an FQDN and will attempt SMTP delivery to the Internet.
482 if (haschar(node, '.') > 0) {
483 return(MES_INTERNET);
486 /* Otherwise we look in the IGnet maps for a valid Citadel node.
487 * Try directly-connected nodes first...
489 ignetcfg = CtdlGetSysConfig(IGNETCFG);
490 for (i=0; i<num_tokens(ignetcfg, '\n'); ++i) {
491 extract_token(buf, ignetcfg, i, '\n', sizeof buf);
492 extract_token(testnode, buf, 0, '|', sizeof testnode);
493 if (!strcasecmp(node, testnode)) {
501 * Then try nodes that are two or more hops away.
503 ignetmap = CtdlGetSysConfig(IGNETMAP);
504 for (i=0; i<num_tokens(ignetmap, '\n'); ++i) {
505 extract_token(buf, ignetmap, i, '\n', sizeof buf);
506 extract_token(testnode, buf, 0, '|', sizeof testnode);
507 if (!strcasecmp(node, testnode)) {
514 /* If we get to this point it's an invalid node name */
520 * Validate recipients, count delivery types and errors, and handle aliasing
521 * FIXME check for dupes!!!!!
523 * Returns 0 if all addresses are ok, ret->num_error = -1 if no addresses
524 * were specified, or the number of addresses found invalid.
526 * Caller needs to free the result using free_recipients()
528 recptypes *validate_recipients(const char *supplied_recipients, const char *RemoteIdentifier, int Flags)
530 struct CitContext *CCC = CC;
532 char *recipients = NULL;
535 char this_recp_cooked[256];
542 struct ctdluser tempUS;
543 struct ctdlroom tempQR;
544 struct ctdlroom tempQR2;
550 ret = (recptypes *) malloc(sizeof(recptypes));
551 if (ret == NULL) return(NULL);
553 /* Set all strings to null and numeric values to zero */
554 memset(ret, 0, sizeof(recptypes));
556 if (supplied_recipients == NULL) {
557 recipients = strdup("");
560 recipients = strdup(supplied_recipients);
563 /* Allocate some memory. Yes, this allocates 500% more memory than we will
564 * actually need, but it's healthier for the heap than doing lots of tiny
565 * realloc() calls instead.
567 len = strlen(recipients) + 1024;
568 ret->errormsg = malloc(len);
569 ret->recp_local = malloc(len);
570 ret->recp_internet = malloc(len);
571 ret->recp_ignet = malloc(len);
572 ret->recp_room = malloc(len);
573 ret->display_recp = malloc(len);
574 ret->recp_orgroom = malloc(len);
575 org_recp = malloc(len);
577 ret->errormsg[0] = 0;
578 ret->recp_local[0] = 0;
579 ret->recp_internet[0] = 0;
580 ret->recp_ignet[0] = 0;
581 ret->recp_room[0] = 0;
582 ret->recp_orgroom[0] = 0;
583 ret->display_recp[0] = 0;
585 ret->recptypes_magic = RECPTYPES_MAGIC;
587 /* Change all valid separator characters to commas */
588 for (i=0; !IsEmptyStr(&recipients[i]); ++i) {
589 if ((recipients[i] == ';') || (recipients[i] == '|')) {
594 /* Now start extracting recipients... */
596 while (!IsEmptyStr(recipients)) {
597 for (i=0; i<=strlen(recipients); ++i) {
598 if (recipients[i] == '\"') in_quotes = 1 - in_quotes;
599 if ( ( (recipients[i] == ',') && (!in_quotes) ) || (recipients[i] == 0) ) {
600 safestrncpy(this_recp, recipients, i+1);
602 if (recipients[i] == ',') {
603 strcpy(recipients, &recipients[i+1]);
606 strcpy(recipients, "");
613 if (IsEmptyStr(this_recp))
615 syslog(LOG_DEBUG, "internet_addressing: evaluating recipient #%d: %s", num_recps, this_recp);
618 strcpy(org_recp, this_recp);
621 mailtype = alias(this_recp);
623 for (j = 0; !IsEmptyStr(&this_recp[j]); ++j) {
624 if (this_recp[j]=='_') {
625 this_recp_cooked[j] = ' ';
628 this_recp_cooked[j] = this_recp[j];
631 this_recp_cooked[j] = '\0';
636 if (!strcasecmp(this_recp, "sysop")) {
638 strcpy(this_recp, CtdlGetConfigStr("c_aideroom"));
639 if (!IsEmptyStr(ret->recp_room)) {
640 strcat(ret->recp_room, "|");
642 strcat(ret->recp_room, this_recp);
644 else if ( (!strncasecmp(this_recp, "room_", 5))
645 && (!CtdlGetRoom(&tempQR, &this_recp_cooked[5])) ) {
647 /* Save room so we can restore it later */
651 /* Check permissions to send mail to this room */
652 err = CtdlDoIHavePermissionToPostInThisRoom(
657 0 /* 0 = not a reply */
666 if (!IsEmptyStr(ret->recp_room)) {
667 strcat(ret->recp_room, "|");
669 strcat(ret->recp_room, &this_recp_cooked[5]);
671 if (!IsEmptyStr(ret->recp_orgroom)) {
672 strcat(ret->recp_orgroom, "|");
674 strcat(ret->recp_orgroom, org_recp);
678 /* Restore room in case something needs it */
682 else if (CtdlGetUser(&tempUS, this_recp) == 0) {
684 strcpy(this_recp, tempUS.fullname);
685 if (!IsEmptyStr(ret->recp_local)) {
686 strcat(ret->recp_local, "|");
688 strcat(ret->recp_local, this_recp);
690 else if (CtdlGetUser(&tempUS, this_recp_cooked) == 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);
704 /* Yes, you're reading this correctly: if the target
705 * domain points back to the local system,
706 * the address is invalid. That's
707 * because if the address were valid, we would have
708 * already translated it to a local address by now.
710 if (IsDirectory(this_recp, 0)) {
716 if (!IsEmptyStr(ret->recp_internet)) {
717 strcat(ret->recp_internet, "|");
719 strcat(ret->recp_internet, this_recp);
724 if (!IsEmptyStr(ret->recp_ignet)) {
725 strcat(ret->recp_ignet, "|");
727 strcat(ret->recp_ignet, this_recp);
735 if (IsEmptyStr(errmsg)) {
736 snprintf(append, sizeof append, "Invalid recipient: %s", this_recp);
739 snprintf(append, sizeof append, "%s", errmsg);
741 if ( (strlen(ret->errormsg) + strlen(append) + 3) < SIZ) {
742 if (!IsEmptyStr(ret->errormsg)) {
743 strcat(ret->errormsg, "; ");
745 strcat(ret->errormsg, append);
749 if (IsEmptyStr(ret->display_recp)) {
750 strcpy(append, this_recp);
753 snprintf(append, sizeof append, ", %s", this_recp);
755 if ( (strlen(ret->display_recp)+strlen(append)) < SIZ) {
756 strcat(ret->display_recp, append);
762 if ((ret->num_local + ret->num_internet + ret->num_ignet +
763 ret->num_room + ret->num_error) == 0) {
764 ret->num_error = (-1);
765 strcpy(ret->errormsg, "No recipients specified.");
768 syslog(LOG_DEBUG, "internet_addressing: validate_recipients() = %d local, %d room, %d SMTP, %d IGnet, %d error",
769 ret->num_local, ret->num_room, ret->num_internet, ret->num_ignet, ret->num_error
778 * Destructor for recptypes
780 void free_recipients(recptypes *valid) {
786 if (valid->recptypes_magic != RECPTYPES_MAGIC) {
787 syslog(LOG_ERR, "internet_addressing: attempt to call free_recipients() on some other data type!");
791 if (valid->errormsg != NULL) free(valid->errormsg);
792 if (valid->recp_local != NULL) free(valid->recp_local);
793 if (valid->recp_internet != NULL) free(valid->recp_internet);
794 if (valid->recp_ignet != NULL) free(valid->recp_ignet);
795 if (valid->recp_room != NULL) free(valid->recp_room);
796 if (valid->recp_orgroom != NULL) free(valid->recp_orgroom);
797 if (valid->display_recp != NULL) free(valid->display_recp);
798 if (valid->bounce_to != NULL) free(valid->bounce_to);
799 if (valid->envelope_from != NULL) free(valid->envelope_from);
800 if (valid->sending_room != NULL) free(valid->sending_room);
805 char *qp_encode_email_addrs(char *source)
807 char *user, *node, *name;
808 const char headerStr[] = "=?UTF-8?Q?";
812 int need_to_encode = 0;
818 long nAddrPtrMax = 50;
823 if (source == NULL) return source;
824 if (IsEmptyStr(source)) return source;
825 syslog(LOG_DEBUG, "internet_addressing: qp_encode_email_addrs <%s>", source);
827 AddrPtr = malloc (sizeof (long) * nAddrPtrMax);
828 AddrUtf8 = malloc (sizeof (long) * nAddrPtrMax);
829 memset(AddrUtf8, 0, sizeof (long) * nAddrPtrMax);
832 while (!IsEmptyStr (&source[i])) {
833 if (nColons >= nAddrPtrMax){
836 ptr = (long *) malloc(sizeof (long) * nAddrPtrMax * 2);
837 memcpy (ptr, AddrPtr, sizeof (long) * nAddrPtrMax);
838 free (AddrPtr), AddrPtr = ptr;
840 ptr = (long *) malloc(sizeof (long) * nAddrPtrMax * 2);
841 memset(&ptr[nAddrPtrMax], 0,
842 sizeof (long) * nAddrPtrMax);
844 memcpy (ptr, AddrUtf8, sizeof (long) * nAddrPtrMax);
845 free (AddrUtf8), AddrUtf8 = ptr;
848 if (((unsigned char) source[i] < 32) ||
849 ((unsigned char) source[i] > 126)) {
851 AddrUtf8[nColons] = 1;
853 if (source[i] == '"')
854 InQuotes = !InQuotes;
855 if (!InQuotes && source[i] == ',') {
856 AddrPtr[nColons] = i;
861 if (need_to_encode == 0) {
868 EncodedMaxLen = nColons * (sizeof(headerStr) + 3) + SourceLen * 3;
869 Encoded = (char*) malloc (EncodedMaxLen);
871 for (i = 0; i < nColons; i++) {
872 source[AddrPtr[i]++] = '\0';
874 /* TODO: if libidn, this might get larger*/
875 user = malloc(SourceLen + 1);
876 node = malloc(SourceLen + 1);
877 name = malloc(SourceLen + 1);
881 for (i = 0; i < nColons && nPtr != NULL; i++) {
882 nmax = EncodedMaxLen - (nPtr - Encoded);
884 process_rfc822_addr(&source[AddrPtr[i]],
888 /* TODO: libIDN here ! */
889 if (IsEmptyStr(name)) {
890 n = snprintf(nPtr, nmax,
891 (i==0)?"%s@%s" : ",%s@%s",
895 EncodedName = rfc2047encode(name, strlen(name));
896 n = snprintf(nPtr, nmax,
897 (i==0)?"%s <%s@%s>" : ",%s <%s@%s>",
898 EncodedName, user, node);
903 n = snprintf(nPtr, nmax,
905 &source[AddrPtr[i]]);
911 ptr = (char*) malloc(EncodedMaxLen * 2);
912 memcpy(ptr, Encoded, EncodedMaxLen);
913 nnPtr = ptr + (nPtr - Encoded), nPtr = nnPtr;
914 free(Encoded), Encoded = ptr;
916 i--; /* do it once more with properly lengthened buffer */
919 for (i = 0; i < nColons; i++)
920 source[--AddrPtr[i]] = ',';
932 * Unfold a multi-line field into a single line, removing multi-whitespaces
934 void unfold_rfc822_field(char **field, char **FieldEnd)
937 char *pField = *field;
939 char *pFieldEnd = *FieldEnd;
941 while (isspace(*pField))
943 /* remove leading/trailing whitespace */
946 while (isspace(*pFieldEnd))
949 *FieldEnd = pFieldEnd;
950 /* convert non-space whitespace to spaces, and remove double blanks */
951 for (sField = *field = pField;
955 if ((*sField=='\r') || (*sField=='\n'))
958 while (((*(sField + Offset) == '\r') ||
959 (*(sField + Offset) == '\n') ||
960 (isspace(*(sField + Offset)))) &&
961 (sField + Offset < pFieldEnd))
967 if (*sField=='\"') quote = 1 - quote;
969 if (isspace(*sField))
975 while ((sField < pFieldEnd) &&
980 else *pField = *sField;
982 else *pField = *sField;
986 *FieldEnd = pField - 1;
991 * Split an RFC822-style address into userid, host, and full name
994 void process_rfc822_addr(const char *rfc822, char *user, char *node, char *name)
999 strcpy(node, CtdlGetConfigStr("c_fqdn"));
1002 if (rfc822 == NULL) return;
1004 /* extract full name - first, it's From minus <userid> */
1005 strcpy(name, rfc822);
1006 stripout(name, '<', '>');
1008 /* strip anything to the left of a bang */
1009 while ((!IsEmptyStr(name)) && (haschar(name, '!') > 0))
1010 strcpy(name, &name[1]);
1012 /* and anything to the right of a @ or % */
1013 for (a = 0; name[a] != '\0'; ++a) {
1014 if (name[a] == '@') {
1018 if (name[a] == '%') {
1024 /* but if there are parentheses, that changes the rules... */
1025 if ((haschar(rfc822, '(') == 1) && (haschar(rfc822, ')') == 1)) {
1026 strcpy(name, rfc822);
1027 stripallbut(name, '(', ')');
1030 /* but if there are a set of quotes, that supersedes everything */
1031 if (haschar(rfc822, 34) == 2) {
1032 strcpy(name, rfc822);
1033 while ((!IsEmptyStr(name)) && (name[0] != 34)) {
1034 strcpy(&name[0], &name[1]);
1036 strcpy(&name[0], &name[1]);
1037 for (a = 0; name[a] != '\0'; ++a)
1038 if (name[a] == 34) {
1043 /* extract user id */
1044 strcpy(user, rfc822);
1046 /* first get rid of anything in parens */
1047 stripout(user, '(', ')');
1049 /* if there's a set of angle brackets, strip it down to that */
1050 if ((haschar(user, '<') == 1) && (haschar(user, '>') == 1)) {
1051 stripallbut(user, '<', '>');
1054 /* strip anything to the left of a bang */
1055 while ((!IsEmptyStr(user)) && (haschar(user, '!') > 0))
1056 strcpy(user, &user[1]);
1058 /* and anything to the right of a @ or % */
1059 for (a = 0; user[a] != '\0'; ++a) {
1060 if (user[a] == '@') {
1064 if (user[a] == '%') {
1071 /* extract node name */
1072 strcpy(node, rfc822);
1074 /* first get rid of anything in parens */
1075 stripout(node, '(', ')');
1077 /* if there's a set of angle brackets, strip it down to that */
1078 if ((haschar(node, '<') == 1) && (haschar(node, '>') == 1)) {
1079 stripallbut(node, '<', '>');
1082 /* If no node specified, tack ours on instead */
1084 (haschar(node, '@')==0)
1085 && (haschar(node, '%')==0)
1086 && (haschar(node, '!')==0)
1088 strcpy(node, CtdlGetConfigStr("c_nodename"));
1093 /* strip anything to the left of a @ */
1094 while ((!IsEmptyStr(node)) && (haschar(node, '@') > 0))
1095 strcpy(node, &node[1]);
1097 /* strip anything to the left of a % */
1098 while ((!IsEmptyStr(node)) && (haschar(node, '%') > 0))
1099 strcpy(node, &node[1]);
1101 /* reduce multiple system bang paths to node!user */
1102 while ((!IsEmptyStr(node)) && (haschar(node, '!') > 1))
1103 strcpy(node, &node[1]);
1105 /* now get rid of the user portion of a node!user string */
1106 for (a = 0; node[a] != '\0'; ++a)
1107 if (node[a] == '!') {
1113 /* strip leading and trailing spaces in all strings */
1118 /* If we processed a string that had the address in angle brackets
1119 * but no name outside the brackets, we now have an empty name. In
1120 * this case, use the user portion of the address as the name.
1122 if ((IsEmptyStr(name)) && (!IsEmptyStr(user))) {
1129 * convert_field() is a helper function for convert_internet_message().
1130 * Given start/end positions for an rfc822 field, it converts it to a Citadel
1131 * field if it wants to, and unfolds it if necessary.
1133 * Returns 1 if the field was converted and inserted into the Citadel message
1134 * structure, implying that the source field should be removed from the
1137 int convert_field(struct CtdlMessage *msg, const char *beg, const char *end) {
1138 char *key, *value, *valueend;
1142 const char *colonpos = NULL;
1151 for (pos = end; pos >= beg; pos--) {
1152 if (*pos == ':') colonpos = pos;
1155 if (colonpos == NULL) return(0); /* no colon? not a valid header line */
1158 key = malloc(len + 2);
1159 memcpy(key, beg, len + 1);
1161 valueend = key + len;
1162 * ( key + (colonpos - beg) ) = '\0';
1163 value = &key[(colonpos - beg) + 1];
1164 /* printf("Header: [%s]\nValue: [%s]\n", key, value); */
1165 unfold_rfc822_field(&value, &valueend);
1166 valuelen = valueend - value + 1;
1167 /* printf("UnfoldedValue: [%s]\n", value); */
1170 * Here's the big rfc822-to-citadel loop.
1173 /* Date/time is converted into a unix timestamp. If the conversion
1174 * fails, we replace it with the time the message arrived locally.
1176 if (!strcasecmp(key, "Date")) {
1177 parsed_date = parsedate(value);
1178 if (parsed_date < 0L) parsed_date = time(NULL);
1180 if (CM_IsEmpty(msg, eTimestamp))
1181 CM_SetFieldLONG(msg, eTimestamp, parsed_date);
1185 else if (!strcasecmp(key, "From")) {
1186 process_rfc822_addr(value, user, node, name);
1187 syslog(LOG_DEBUG, "internet_addressing: converted to <%s@%s> (%s)", user, node, name);
1188 snprintf(addr, sizeof(addr), "%s@%s", user, node);
1189 if (CM_IsEmpty(msg, eAuthor) && !IsEmptyStr(name))
1190 CM_SetField(msg, eAuthor, name, strlen(name));
1191 if (CM_IsEmpty(msg, erFc822Addr) && !IsEmptyStr(addr))
1192 CM_SetField(msg, erFc822Addr, addr, strlen(addr));
1196 else if (!strcasecmp(key, "Subject")) {
1197 if (CM_IsEmpty(msg, eMsgSubject))
1198 CM_SetField(msg, eMsgSubject, value, valuelen);
1202 else if (!strcasecmp(key, "List-ID")) {
1203 if (CM_IsEmpty(msg, eListID))
1204 CM_SetField(msg, eListID, value, valuelen);
1208 else if (!strcasecmp(key, "To")) {
1209 if (CM_IsEmpty(msg, eRecipient))
1210 CM_SetField(msg, eRecipient, value, valuelen);
1214 else if (!strcasecmp(key, "CC")) {
1215 if (CM_IsEmpty(msg, eCarbonCopY))
1216 CM_SetField(msg, eCarbonCopY, value, valuelen);
1220 else if (!strcasecmp(key, "Message-ID")) {
1221 if (!CM_IsEmpty(msg, emessageId)) {
1222 syslog(LOG_WARNING, "internet_addressing: duplicate message id");
1229 pValueLen = valuelen;
1230 /* Strip angle brackets */
1231 while (haschar(pValue, '<') > 0) {
1236 for (i = 0; i <= pValueLen; ++i)
1237 if (pValue[i] == '>') {
1242 CM_SetField(msg, emessageId, pValue, pValueLen);
1248 else if (!strcasecmp(key, "Return-Path")) {
1249 if (CM_IsEmpty(msg, eMessagePath))
1250 CM_SetField(msg, eMessagePath, value, valuelen);
1254 else if (!strcasecmp(key, "Envelope-To")) {
1255 if (CM_IsEmpty(msg, eenVelopeTo))
1256 CM_SetField(msg, eenVelopeTo, value, valuelen);
1260 else if (!strcasecmp(key, "References")) {
1261 CM_SetField(msg, eWeferences, value, valuelen);
1265 else if (!strcasecmp(key, "Reply-To")) {
1266 CM_SetField(msg, eReplyTo, value, valuelen);
1270 else if (!strcasecmp(key, "In-reply-to")) {
1271 if (CM_IsEmpty(msg, eWeferences)) /* References: supersedes In-reply-to: */
1272 CM_SetField(msg, eWeferences, value, valuelen);
1278 /* Clean up and move on. */
1279 free(key); /* Don't free 'value', it's actually the same buffer */
1285 * Convert RFC822 references format (References) to Citadel references format (Weferences)
1287 void convert_references_to_wefewences(char *str) {
1288 int bracket_nesting = 0;
1290 char *moveptr = NULL;
1297 if (bracket_nesting < 0) bracket_nesting = 0;
1299 if ((ch == '>') && (bracket_nesting == 0) && (*(ptr+1)) && (ptr>str) ) {
1303 else if (bracket_nesting > 0) {
1309 *moveptr = *(moveptr+1);
1313 if (ch == '<') ++bracket_nesting;
1320 * Convert an RFC822 message (headers + body) to a CtdlMessage structure.
1321 * NOTE: the supplied buffer becomes part of the CtdlMessage structure, and
1322 * will be deallocated when CM_Free() is called. Therefore, the
1323 * supplied buffer should be DEREFERENCED. It should not be freed or used
1326 struct CtdlMessage *convert_internet_message(char *rfc822) {
1327 StrBuf *RFCBuf = NewStrBufPlain(rfc822, -1);
1329 return convert_internet_message_buf(&RFCBuf);
1333 struct CtdlMessage *convert_internet_message_buf(StrBuf **rfc822)
1335 struct CtdlMessage *msg;
1336 const char *pos, *beg, *end, *totalend;
1337 int done, alldone = 0;
1339 StrBuf *OtherHeaders;
1341 msg = malloc(sizeof(struct CtdlMessage));
1342 if (msg == NULL) return msg;
1344 memset(msg, 0, sizeof(struct CtdlMessage));
1345 msg->cm_magic = CTDLMESSAGE_MAGIC; /* self check */
1346 msg->cm_anon_type = 0; /* never anonymous */
1347 msg->cm_format_type = FMT_RFC822; /* internet message */
1349 pos = ChrPtr(*rfc822);
1350 totalend = pos + StrLength(*rfc822);
1352 OtherHeaders = NewStrBufPlain(NULL, StrLength(*rfc822));
1356 /* Locate beginning and end of field, keeping in mind that
1357 * some fields might be multiline
1361 while ((end < totalend) &&
1366 if ( (*pos=='\n') && ((*(pos+1))!=0x20) && ((*(pos+1))!=0x09) )
1371 /* done with headers? */
1373 ( (*(pos+1)=='\n') ||
1379 if (pos >= (totalend - 1) )
1389 /* At this point we have a field. Are we interested in it? */
1390 converted = convert_field(msg, beg, end);
1392 /* Strip the field out of the RFC822 header if we used it */
1394 StrBufAppendBufPlain(OtherHeaders, beg, end - beg, 0);
1395 StrBufAppendBufPlain(OtherHeaders, HKEY("\n"), 0);
1398 /* If we've hit the end of the message, bail out */
1399 if (pos >= totalend)
1402 StrBufAppendBufPlain(OtherHeaders, HKEY("\n"), 0);
1404 StrBufAppendBufPlain(OtherHeaders, pos, totalend - pos, 0);
1406 CM_SetAsFieldSB(msg, eMesageText, &OtherHeaders);
1408 /* Follow-up sanity checks... */
1410 /* If there's no timestamp on this message, set it to now. */
1411 if (CM_IsEmpty(msg, eTimestamp)) {
1412 CM_SetFieldLONG(msg, eTimestamp, time(NULL));
1415 /* If a W (references, or rather, Wefewences) field is present, we
1416 * have to convert it from RFC822 format to Citadel format.
1418 if (!CM_IsEmpty(msg, eWeferences)) {
1420 convert_references_to_wefewences(msg->cm_fields[eWeferences]);
1428 * Look for a particular header field in an RFC822 message text. If the
1429 * requested field is found, it is unfolded (if necessary) and returned to
1430 * the caller. The field name is stripped out, leaving only its contents.
1431 * The caller is responsible for freeing the returned buffer. If the requested
1432 * field is not present, or anything else goes wrong, it returns NULL.
1434 char *rfc822_fetch_field(const char *rfc822, const char *fieldname) {
1435 char *fieldbuf = NULL;
1436 const char *end_of_headers;
1437 const char *field_start;
1442 /* Should never happen, but sometimes we get stupid */
1443 if (rfc822 == NULL) return(NULL);
1444 if (fieldname == NULL) return(NULL);
1446 snprintf(fieldhdr, sizeof fieldhdr, "%s:", fieldname);
1448 /* Locate the end of the headers, so we don't run past that point */
1449 end_of_headers = cbmstrcasestr(rfc822, "\n\r\n");
1450 if (end_of_headers == NULL) {
1451 end_of_headers = cbmstrcasestr(rfc822, "\n\n");
1453 if (end_of_headers == NULL) return (NULL);
1455 field_start = cbmstrcasestr(rfc822, fieldhdr);
1456 if (field_start == NULL) return(NULL);
1457 if (field_start > end_of_headers) return(NULL);
1459 fieldbuf = malloc(SIZ);
1460 strcpy(fieldbuf, "");
1463 ptr = cmemreadline(ptr, fieldbuf, SIZ-strlen(fieldbuf) );
1464 while ( (isspace(ptr[0])) && (ptr < end_of_headers) ) {
1465 strcat(fieldbuf, " ");
1466 cont = &fieldbuf[strlen(fieldbuf)];
1467 ptr = cmemreadline(ptr, cont, SIZ-strlen(fieldbuf) );
1471 strcpy(fieldbuf, &fieldbuf[strlen(fieldhdr)]);
1478 /*****************************************************************************
1479 * DIRECTORY MANAGEMENT FUNCTIONS *
1480 *****************************************************************************/
1483 * Generate the index key for an Internet e-mail address to be looked up
1486 void directory_key(char *key, char *addr) {
1490 for (i=0; !IsEmptyStr(&addr[i]); ++i) {
1491 if (!isspace(addr[i])) {
1492 key[keylen++] = tolower(addr[i]);
1497 syslog(LOG_DEBUG, "internet_addressing: directory key is <%s>", key);
1501 /* Return nonzero if the supplied address is in one of "our" domains
1503 int IsDirectory(char *addr, int allow_masq_domains) {
1507 extract_token(domain, addr, 1, '@', sizeof domain);
1510 h = CtdlHostAlias(domain);
1512 if ( (h == hostalias_masq) && allow_masq_domains)
1515 if (h == hostalias_localhost) {
1525 * Add an Internet e-mail address to the directory for a user
1527 int CtdlDirectoryAddUser(char *internet_addr, char *citadel_addr) {
1530 if (IsDirectory(internet_addr, 0) == 0) {
1533 syslog(LOG_DEBUG, "internet_addressing: create directory entry: %s --> %s", internet_addr, citadel_addr);
1534 directory_key(key, internet_addr);
1535 cdb_store(CDB_DIRECTORY, key, strlen(key), citadel_addr, strlen(citadel_addr)+1 );
1541 * Delete an Internet e-mail address from the directory.
1543 * (NOTE: we don't actually use or need the citadel_addr variable; it's merely
1544 * here because the callback API expects to be able to send it.)
1546 int CtdlDirectoryDelUser(char *internet_addr, char *citadel_addr) {
1549 syslog(LOG_DEBUG, "internet_addressing: delete directory entry: %s --> %s", internet_addr, citadel_addr);
1550 directory_key(key, internet_addr);
1551 return cdb_delete(CDB_DIRECTORY, key, strlen(key) ) == 0;
1556 * Look up an Internet e-mail address in the directory.
1557 * On success: returns 0, and Citadel address stored in 'target'
1558 * On failure: returns nonzero
1560 int CtdlDirectoryLookup(char *target, char *internet_addr, size_t targbuflen) {
1561 struct cdbdata *cdbrec;
1564 /* Dump it in there unchanged, just for kicks */
1565 safestrncpy(target, internet_addr, targbuflen);
1567 /* Only do lookups for addresses with hostnames in them */
1568 if (num_tokens(internet_addr, '@') != 2) return(-1);
1570 /* Only do lookups for domains in the directory */
1571 if (IsDirectory(internet_addr, 0) == 0) return(-1);
1573 directory_key(key, internet_addr);
1574 cdbrec = cdb_fetch(CDB_DIRECTORY, key, strlen(key) );
1575 if (cdbrec != NULL) {
1576 safestrncpy(target, cdbrec->ptr, targbuflen);
1586 * Harvest any email addresses that someone might want to have in their
1587 * "collected addresses" book.
1589 char *harvest_collected_addresses(struct CtdlMessage *msg) {
1592 char user[256], node[256], name[256];
1595 eMsgField field = 0;
1597 if (msg == NULL) return(NULL);
1601 if (!CM_IsEmpty(msg, eAuthor)) {
1602 strcat(addr, msg->cm_fields[eAuthor]);
1604 if (!CM_IsEmpty(msg, erFc822Addr)) {
1606 strcat(addr, msg->cm_fields[erFc822Addr]);
1608 if (IsDirectory(msg->cm_fields[erFc822Addr], 0)) {
1613 if (is_harvestable) {
1614 coll = strdup(addr);
1620 if (coll == NULL) return(NULL);
1622 /* Scan both the R (To) and Y (CC) fields */
1623 for (i = 0; i < 2; ++i) {
1624 if (i == 0) field = eRecipient;
1625 if (i == 1) field = eCarbonCopY;
1627 if (!CM_IsEmpty(msg, field)) {
1628 for (j=0; j<num_tokens(msg->cm_fields[field], ','); ++j) {
1629 extract_token(addr, msg->cm_fields[field], j, ',', sizeof addr);
1630 if (strstr(addr, "=?") != NULL)
1631 utf8ify_rfc822_string(addr);
1632 process_rfc822_addr(addr, user, node, name);
1633 h = CtdlHostAlias(node);
1634 if (h != hostalias_localhost) {
1635 coll = realloc(coll, strlen(coll) + strlen(addr) + 4);
1636 if (coll == NULL) return(NULL);
1637 if (!IsEmptyStr(coll)) {
1647 if (IsEmptyStr(coll)) {
1656 * Helper function for CtdlRebuildDirectoryIndex()
1658 * Call this function as a ForEachUser backend in order to queue up
1659 * user names, or call it with a null user to make it do the processing.
1660 * This allows us to maintain the list as a static instead of passing
1663 void CtdlRebuildDirectoryIndex_backend(struct ctdluser *usbuf, void *data) {
1670 static struct crdib *e = NULL;
1671 static int num_e = 0;
1672 static int alloc_e = 0;
1674 /* this is the calling mode where we add a user */
1676 if (usbuf != NULL) {
1677 if (num_e >= alloc_e) {
1680 e = malloc(sizeof(struct crdib) * alloc_e);
1684 e = realloc(e, (sizeof(struct crdib) * alloc_e));
1687 strcpy(e[num_e].name, usbuf->fullname);
1688 strcpy(e[num_e].emails, usbuf->emailaddrs);
1693 /* this is the calling mode where we do the processing */
1696 for (i=0; i<num_e; ++i) {
1697 if ( (!IsEmptyStr(e[i].name)) && (!IsEmptyStr(e[i].emails)) ) {
1698 for (j=0; j<num_tokens(e[i].emails, '|'); ++j) {
1699 char one_email[512];
1700 extract_token(one_email, e[i].emails, j, '|', sizeof one_email);
1701 CtdlDirectoryAddUser(one_email, e[i].name);
1713 * Initialize the directory database (erasing anything already there)
1715 void CtdlRebuildDirectoryIndex(void) {
1716 syslog(LOG_INFO, "internet_addressing: rebuilding email address directory index");
1717 cdb_trunc(CDB_DIRECTORY);
1718 ForEachUser(CtdlRebuildDirectoryIndex_backend, NULL);
1719 CtdlRebuildDirectoryIndex_backend(NULL, NULL);