/*
* Convert FN (Friendly Name) into N (Name)
*
* vname Supplied friendly-name
* n Target buffer to store Name
* vname_size Size of buffer
*/
void vcard_fn_to_n(char *vname, char *n, size_t vname_size) {
char lastname[256];
char firstname[256];
char middlename[256];
char honorific_prefixes[256];
char honorific_suffixes[256];
char buf[256];
safestrncpy(buf, n, sizeof buf);
/* Try to intelligently convert the screen name to a
* fully expanded vCard name based on the number of
* words in the name
*/
safestrncpy(lastname, "", sizeof lastname);
safestrncpy(firstname, "", sizeof firstname);
safestrncpy(middlename, "", sizeof middlename);
safestrncpy(honorific_prefixes, "", sizeof honorific_prefixes);
safestrncpy(honorific_suffixes, "", sizeof honorific_suffixes);
/* Honorific suffixes */
if (num_tokens(buf, ',') > 1) {
extract_token(honorific_suffixes, buf, (num_tokens(buf, ' ') - 1), ',',
sizeof honorific_suffixes);
remove_token(buf, (num_tokens(buf, ',') - 1), ',');
}
/* Find a last name */
extract_token(lastname, buf, (num_tokens(buf, ' ') - 1), ' ', sizeof lastname);
remove_token(buf, (num_tokens(buf, ' ') - 1), ' ');
/* Find honorific prefixes */
if (num_tokens(buf, ' ') > 2) {
extract_token(honorific_prefixes, buf, 0, ' ', sizeof honorific_prefixes);
remove_token(buf, 0, ' ');
}
/* Find a middle name */
if (num_tokens(buf, ' ') > 1) {
extract_token(middlename, buf, (num_tokens(buf, ' ') - 1), ' ', sizeof middlename);
remove_token(buf, (num_tokens(buf, ' ') - 1), ' ');
}
/* Anything left is probably the first name */
safestrncpy(firstname, buf, sizeof firstname);
striplt(firstname);
/* Compose the structured name */
snprintf(vname, vname_size, "%s;%s;%s;%s;%s", lastname, firstname, middlename,
honorific_prefixes, honorific_suffixes);
}
/*
* Remove the "charset=" attribute from a vCard property name
*
*/
void remove_charset_attribute(char *strbuf)
{
int i, t;
char compare[256];
t = num_tokens(strbuf, ';');
for (i=0; i<t; ++i) {
extract_token(compare, strbuf, i, ';', sizeof compare);
striplt(compare);
if (!strncasecmp(compare, "charset=", 8)) {
remove_token(strbuf, i, ';');
}
}
if (!IsEmptyStr(strbuf)) {
if (strbuf[strlen(strbuf)-1] == ';') {
strbuf[strlen(strbuf)-1] = 0;
}
}
}
/*
* smtp_do_bounce() is caled by smtp_do_procmsg() to scan a set of delivery
* instructions for "5" codes (permanent fatal errors) and produce/deliver
* a "bounce" message (delivery status notification).
*/
void smtp_do_bounce(char *instr, StrBuf *OMsgTxt)
{
int i;
int lines;
int status;
char buf[1024];
char key[1024];
char addr[1024];
char dsn[1024];
char bounceto[1024];
StrBuf *boundary;
int num_bounces = 0;
int bounce_this = 0;
time_t submitted = 0L;
struct CtdlMessage *bmsg = NULL;
int give_up = 0;
recptypes *valid;
int successful_bounce = 0;
static int seq = 0;
StrBuf *BounceMB;
long omsgid = (-1);
syslog(LOG_DEBUG, "smtp_do_bounce() called\n");
strcpy(bounceto, "");
boundary = NewStrBufPlain(HKEY("=_Citadel_Multipart_"));
StrBufAppendPrintf(boundary, "%s_%04x%04x", CtdlGetConfigStr("c_fqdn"), getpid(), ++seq);
lines = num_tokens(instr, '\n');
/* See if it's time to give up on delivery of this message */
for (i=0; i<lines; ++i) {
extract_token(buf, instr, i, '\n', sizeof buf);
extract_token(key, buf, 0, '|', sizeof key);
extract_token(addr, buf, 1, '|', sizeof addr);
if (!strcasecmp(key, "submitted")) {
submitted = atol(addr);
}
}
if ( (time(NULL) - submitted) > SMTP_GIVE_UP ) {
give_up = 1;
}
/* Start building our bounce message */
bmsg = (struct CtdlMessage *) malloc(sizeof(struct CtdlMessage));
if (bmsg == NULL) return;
memset(bmsg, 0, sizeof(struct CtdlMessage));
BounceMB = NewStrBufPlain(NULL, 1024);
bmsg->cm_magic = CTDLMESSAGE_MAGIC;
bmsg->cm_anon_type = MES_NORMAL;
bmsg->cm_format_type = FMT_RFC822;
CM_SetField(bmsg, eAuthor, HKEY("Citadel"));
CM_SetField(bmsg, eOriginalRoom, HKEY(MAILROOM));
CM_SetField(bmsg, eNodeName, CtdlGetConfigStr("c_nodename"), strlen(CtdlGetConfigStr("c_nodename")));
CM_SetField(bmsg, eMsgSubject, HKEY("Delivery Status Notification (Failure)"));
StrBufAppendBufPlain(BounceMB, HKEY("Content-type: multipart/mixed; boundary=\""), 0);
StrBufAppendBuf(BounceMB, boundary, 0);
StrBufAppendBufPlain(BounceMB, HKEY("\"\r\n"), 0);
StrBufAppendBufPlain(BounceMB, HKEY("MIME-Version: 1.0\r\n"), 0);
StrBufAppendBufPlain(BounceMB, HKEY("X-Mailer: " CITADEL "\r\n"), 0);
StrBufAppendBufPlain(
BounceMB,
HKEY("\r\nThis is a multipart message in MIME format."
"\r\n\r\n"), 0);
StrBufAppendBufPlain(BounceMB, HKEY("--"), 0);
StrBufAppendBuf(BounceMB, boundary, 0);
StrBufAppendBufPlain(BounceMB, HKEY("\r\n"), 0);
StrBufAppendBufPlain(BounceMB,
HKEY("Content-type: text/plain\r\n\r\n"), 0);
if (give_up)
{
StrBufAppendBufPlain(
BounceMB,
HKEY("A message you sent could not be delivered "
"to some or all of its recipients\ndue to "
"prolonged unavailability of its destination(s).\n"
"Giving up on the following addresses:\n\n"), 0);
}
else
{
StrBufAppendBufPlain(
BounceMB,
HKEY("A message you sent could not be delivered "
"to some or all of its recipients.\n"
"The following addresses were undeliverable:\n\n"
), 0);
}
/*
* Now go through the instructions checking for stuff.
*/
for (i=0; i<lines; ++i) {
long addrlen;
long dsnlen;
extract_token(buf, instr, i, '\n', sizeof buf);
extract_token(key, buf, 0, '|', sizeof key);
addrlen = extract_token(addr, buf, 1, '|', sizeof addr);
status = extract_int(buf, 2);
dsnlen = extract_token(dsn, buf, 3, '|', sizeof dsn);
bounce_this = 0;
syslog(LOG_DEBUG, "key=<%s> addr=<%s> status=%d dsn=<%s>\n",
key, addr, status, dsn);
if (!strcasecmp(key, "bounceto")) {
strcpy(bounceto, addr);
}
if (!strcasecmp(key, "msgid")) {
omsgid = atol(addr);
}
if (!strcasecmp(key, "remote")) {
if (status == 5) bounce_this = 1;
if (give_up) bounce_this = 1;
}
if (bounce_this) {
++num_bounces;
StrBufAppendBufPlain(BounceMB, addr, addrlen, 0);
StrBufAppendBufPlain(BounceMB, HKEY(": "), 0);
StrBufAppendBufPlain(BounceMB, dsn, dsnlen, 0);
StrBufAppendBufPlain(BounceMB, HKEY("\r\n"), 0);
remove_token(instr, i, '\n');
--i;
--lines;
}
}
/* Attach the original message */
if (omsgid >= 0) {
StrBufAppendBufPlain(BounceMB, HKEY("--"), 0);
StrBufAppendBuf(BounceMB, boundary, 0);
StrBufAppendBufPlain(BounceMB, HKEY("\r\n"), 0);
StrBufAppendBufPlain(
BounceMB,
HKEY("Content-type: message/rfc822\r\n"), 0);
StrBufAppendBufPlain(
BounceMB,
HKEY("Content-Transfer-Encoding: 7bit\r\n"), 0);
StrBufAppendBufPlain(
BounceMB,
HKEY("Content-Disposition: inline\r\n"), 0);
StrBufAppendBufPlain(BounceMB, HKEY("\r\n"), 0);
if (OMsgTxt == NULL) {
CC->redirect_buffer = NewStrBufPlain(NULL, SIZ);
CtdlOutputMsg(omsgid,
MT_RFC822,
HEADERS_ALL,
0, 1, NULL, 0,
NULL, NULL, NULL);
StrBufAppendBuf(BounceMB, CC->redirect_buffer, 0);
FreeStrBuf(&CC->redirect_buffer);
}
else {
StrBufAppendBuf(BounceMB, OMsgTxt, 0);
}
}
/* Close the multipart MIME scope */
StrBufAppendBufPlain(BounceMB, HKEY("--"), 0);
StrBufAppendBuf(BounceMB, boundary, 0);
StrBufAppendBufPlain(BounceMB, HKEY("--\r\n"), 0);
CM_SetAsFieldSB(bmsg, eMesageText, &BounceMB);
/* Deliver the bounce if there's anything worth mentioning */
syslog(LOG_DEBUG, "num_bounces = %d\n", num_bounces);
if (num_bounces > 0) {
/* First try the user who sent the message */
if (IsEmptyStr(bounceto))
syslog(LOG_ERR, "No bounce address specified\n");
else
syslog(LOG_DEBUG, "bounce to user <%s>\n", bounceto);
/* Can we deliver the bounce to the original sender? */
valid = validate_recipients(bounceto,
smtp_get_Recipients (),
0);
if (valid != NULL) {
if (valid->num_error == 0) {
CtdlSubmitMsg(bmsg, valid, "", QP_EADDR);
successful_bounce = 1;
}
}
/* If not, post it in the Aide> room */
if (successful_bounce == 0) {
CtdlSubmitMsg(bmsg, NULL, CtdlGetConfigStr("c_aideroom"), QP_EADDR);
}
/* Free up the memory we used */
if (valid != NULL) {
free_recipients(valid);
}
}
FreeStrBuf(&boundary);
CM_Free(bmsg);
syslog(LOG_DEBUG, "Done processing bounces\n");
}
/*
* Handle subjects with RFC2047 encoding such as:
* =?koi8-r?B?78bP0s3Mxc7JxSDXz9rE1dvO2c3JINvB0sHNySDP?=
*/
void utf8ify_rfc822_string(char *buf) {
char *start, *end, *next, *nextend, *ptr;
char newbuf[1024];
char charset[128];
char encoding[16];
char istr[1024];
iconv_t ic = (iconv_t)(-1) ;
char *ibuf; /**< Buffer of characters to be converted */
char *obuf; /**< Buffer for converted characters */
size_t ibuflen; /**< Length of input buffer */
size_t obuflen; /**< Length of output buffer */
char *isav; /**< Saved pointer to input buffer */
char *osav; /**< Saved pointer to output buffer */
int passes = 0;
int i, len, delta;
int illegal_non_rfc2047_encoding = 0;
/* Sometimes, badly formed messages contain strings which were simply
* written out directly in some foreign character set instead of
* using RFC2047 encoding. This is illegal but we will attempt to
* handle it anyway by converting from a user-specified default
* charset to UTF-8 if we see any nonprintable characters.
*/
len = strlen(buf);
for (i=0; i<len; ++i) {
if ((buf[i] < 32) || (buf[i] > 126)) {
illegal_non_rfc2047_encoding = 1;
i = len; ///< take a shortcut, it won't be more than one.
}
}
if (illegal_non_rfc2047_encoding) {
const char *default_header_charset = "iso-8859-1";
if ( (strcasecmp(default_header_charset, "UTF-8")) && (strcasecmp(default_header_charset, "us-ascii")) ) {
ctdl_iconv_open("UTF-8", default_header_charset, &ic);
if (ic != (iconv_t)(-1) ) {
ibuf = malloc(1024);
isav = ibuf;
safestrncpy(ibuf, buf, 1024);
ibuflen = strlen(ibuf);
obuflen = 1024;
obuf = (char *) malloc(obuflen);
osav = obuf;
iconv(ic, &ibuf, &ibuflen, &obuf, &obuflen);
osav[1024-obuflen] = 0;
strcpy(buf, osav);
free(osav);
iconv_close(ic);
free(isav);
}
}
}
/* pre evaluate the first pair */
nextend = end = NULL;
len = strlen(buf);
start = strstr(buf, "=?");
if (start != NULL)
FindNextEnd (start, end);
while ((start != NULL) && (end != NULL))
{
next = strstr(end, "=?");
if (next != NULL)
FindNextEnd(next, nextend);
if (nextend == NULL)
next = NULL;
/* did we find two partitions */
if ((next != NULL) &&
((next - end) > 2))
{
ptr = end + 2;
while ((ptr < next) &&
(isspace(*ptr) ||
(*ptr == '\r') ||
(*ptr == '\n') ||
(*ptr == '\t')))
ptr ++;
/* did we find a gab just filled with blanks? */
if (ptr == next)
{
memmove (end + 2,
next,
len - (next - start));
/* now terminate the gab at the end */
delta = (next - end) - 2;
len -= delta;
buf[len] = '\0';
/* move next to its new location. */
next -= delta;
nextend -= delta;
}
}
/* our next-pair is our new first pair now. */
start = next;
end = nextend;
}
/* Now we handle foreign character sets properly encoded
* in RFC2047 format.
*/
start = strstr(buf, "=?");
FindNextEnd((start != NULL)? start : buf, end);
while (start != NULL && end != NULL && end > start)
{
extract_token(charset, start, 1, '?', sizeof charset);
extract_token(encoding, start, 2, '?', sizeof encoding);
extract_token(istr, start, 3, '?', sizeof istr);
ibuf = malloc(1024);
isav = ibuf;
if (!strcasecmp(encoding, "B")) { /**< base64 */
ibuflen = CtdlDecodeBase64(ibuf, istr, strlen(istr));
}
else if (!strcasecmp(encoding, "Q")) { /**< quoted-printable */
size_t len;
unsigned long pos;
len = strlen(istr);
pos = 0;
while (pos < len)
{
if (istr[pos] == '_') istr[pos] = ' ';
pos++;
}
ibuflen = CtdlDecodeQuotedPrintable(ibuf, istr, len);
}
else {
strcpy(ibuf, istr); /**< unknown encoding */
ibuflen = strlen(istr);
}
ctdl_iconv_open("UTF-8", charset, &ic);
if (ic != (iconv_t)(-1) ) {
obuflen = 1024;
obuf = (char *) malloc(obuflen);
osav = obuf;
iconv(ic, &ibuf, &ibuflen, &obuf, &obuflen);
osav[1024-obuflen] = 0;
end = start;
end++;
strcpy(start, "");
remove_token(end, 0, '?');
remove_token(end, 0, '?');
remove_token(end, 0, '?');
remove_token(end, 0, '?');
strcpy(end, &end[1]);
snprintf(newbuf, sizeof newbuf, "%s%s%s", buf, osav, end);
strcpy(buf, newbuf);
free(osav);
iconv_close(ic);
}
else {
end = start;
end++;
strcpy(start, "");
remove_token(end, 0, '?');
remove_token(end, 0, '?');
remove_token(end, 0, '?');
remove_token(end, 0, '?');
strcpy(end, &end[1]);
snprintf(newbuf, sizeof newbuf, "%s(unreadable)%s", buf, end);
strcpy(buf, newbuf);
}
free(isav);
/*
* Since spammers will go to all sorts of absurd lengths to get their
* messages through, there are LOTS of corrupt headers out there.
* So, prevent a really badly formed RFC2047 header from throwing
* this function into an infinite loop.
*/
++passes;
if (passes > 20) return;
start = strstr(buf, "=?");
FindNextEnd((start != NULL)? start : buf, end);
}
}