/*
* Copyright notice from original mutt:
* Copyright (C) 1996-2000 Michael R. Elkins <me@mutt.org>
*
* This file is part of mutt-ng, see http://www.muttng.org/.
* It's licensed under the GNU General Public License,
* please see the file GPL in the top level source directory.
*/
#if HAVE_CONFIG_H
# include "config.h"
#endif
#include "mutt.h"
#include "buffer.h"
#include "enter.h"
#include "ascii.h"
#include "recvattach.h"
#include "mx.h"
#include "mime.h"
#include "rfc2047.h"
#include "rfc2231.h"
#include "mutt_crypt.h"
#include "url.h"
#include "lib/mem.h"
#include "lib/intl.h"
#include "lib/str.h"
#include "lib/rx.h"
#include "lib/debug.h"
#include <string.h>
#include <ctype.h>
#include <sys/stat.h>
#include <stdlib.h>
/* Reads an arbitrarily long header field, and looks ahead for continuation
* lines. ``line'' must point to a dynamically allocated string; it is
* increased if more space is required to fit the whole line.
*/
char *mutt_read_rfc822_line (FILE * f, char *line, size_t * linelen)
{
char *buf = line;
char ch;
size_t offset = 0;
FOREVER {
if (fgets (buf, *linelen - offset, f) == NULL || /* end of file or */
(ISSPACE (*line) && !offset)) { /* end of headers */
*line = 0;
return (line);
}
buf += str_len (buf) - 1;
if (*buf == '\n') {
/* we did get a full line. remove trailing space */
while (ISSPACE (*buf))
*buf-- = 0; /* we cannot come beyond line's beginning because
* it begins with a non-space */
/* check to see if the next line is a continuation line */
if ((ch = fgetc (f)) != ' ' && ch != '\t') {
ungetc (ch, f);
return (line); /* next line is a separate header field or EOH */
}
/* eat tabs and spaces from the beginning of the continuation line */
while ((ch = fgetc (f)) == ' ' || ch == '\t');
ungetc (ch, f);
*++buf = ' '; /* string is still terminated because we removed
at least one whitespace char above */
}
buf++;
offset = buf - line;
if (*linelen < offset + STRING) {
/* grow the buffer */
*linelen += STRING;
mem_realloc (&line, *linelen);
buf = line + offset;
}
}
/* not reached */
}
LIST *mutt_parse_references (char *s, int in_reply_to)
{
LIST *t, *lst = NULL;
int m, n = 0;
char *o = NULL, *new, *at;
while ((s = strtok (s, " \t;")) != NULL) {
/*
* some mail clients add other garbage besides message-ids, so do a quick
* check to make sure this looks like a valid message-id
* some idiotic clients also break their message-ids between lines, deal
* with that too (give up if it's more than two lines, though)
*/
t = NULL;
new = NULL;
if (*s == '<') {
n = str_len (s);
if (s[n - 1] != '>') {
o = s;
s = NULL;
continue;
}
new = str_dup (s);
}
else if (o) {
m = str_len (s);
if (s[m - 1] == '>') {
new = mem_malloc (sizeof (char) * (n + m + 1));
strcpy (new, o); /* __STRCPY_CHECKED__ */
strcpy (new + n, s); /* __STRCPY_CHECKED__ */
}
}
if (new) {
/* make sure that this really does look like a message-id.
* it should have exactly one @, and if we're looking at
* an in-reply-to header, make sure that the part before
* the @ has more than eight characters or it's probably
* an email address
*/
if (!(at = strchr (new, '@')) || strchr (at + 1, '@')
|| (in_reply_to && at - new <= 8))
mem_free (&new);
else {
t = (LIST *) mem_malloc (sizeof (LIST));
t->data = new;
t->next = lst;
lst = t;
}
}
o = NULL;
s = NULL;
}
return (lst);
}
int mutt_check_encoding (const char *c)
{
if (ascii_strncasecmp ("7bit", c, sizeof ("7bit") - 1) == 0)
return (ENC7BIT);
else if (ascii_strncasecmp ("8bit", c, sizeof ("8bit") - 1) == 0)
return (ENC8BIT);
else if (ascii_strncasecmp ("binary", c, sizeof ("binary") - 1) == 0)
return (ENCBINARY);
else
if (ascii_strncasecmp
("quoted-printable", c, sizeof ("quoted-printable") - 1) == 0)
return (ENCQUOTEDPRINTABLE);
else if (ascii_strncasecmp ("base64", c, sizeof ("base64") - 1) == 0)
return (ENCBASE64);
else if (ascii_strncasecmp ("x-uuencode", c, sizeof ("x-uuencode") - 1) ==
0)
return (ENCUUENCODED);
#ifdef SUN_ATTACHMENT
else if (ascii_strncasecmp ("uuencode", c, sizeof ("uuencode") - 1) == 0)
return (ENCUUENCODED);
#endif
else
return (ENCOTHER);
}
static PARAMETER *parse_parameters (const char *s)
{
PARAMETER *head = 0, *cur = 0, *new;
char buffer[LONG_STRING];
const char *p;
size_t i;
debug_print (2, ("`%s'\n", s));
while (*s) {
if ((p = strpbrk (s, "=;")) == NULL) {
debug_print (1, ("malformed parameter: %s\n", s));
goto bail;
}
/* if we hit a ; now the parameter has no value, just skip it */
if (*p != ';') {
i = p - s;
new = mutt_new_parameter ();
new->attribute = mem_malloc (i + 1);
memcpy (new->attribute, s, i);
new->attribute[i] = 0;
/* remove whitespace from the end of the attribute name */
while (ISSPACE (new->attribute[--i]))
new->attribute[i] = 0;
s = p + 1; /* skip over the = */
SKIPWS (s);
if (*s == '"') {
int state_ascii = 1;
s++;
for (i = 0; *s && i < sizeof (buffer) - 1; i++, s++) {
if (!option (OPTSTRICTMIME)) {
/* As iso-2022-* has a characer of '"' with non-ascii state,
* ignore it. */
if (*s == 0x1b && i < sizeof (buffer) - 2) {
if (s[1] == '(' && (s[2] == 'B' || s[2] == 'J'))
state_ascii = 1;
else
state_ascii = 0;
}
}
if (state_ascii && *s == '"')
break;
if (*s == '\\') {
/* Quote the next character */
buffer[i] = s[1];
if (!*++s)
break;
}
else
buffer[i] = *s;
}
buffer[i] = 0;
if (*s)
s++; /* skip over the " */
}
else {
for (i = 0; *s && *s != ' ' && *s != ';' && i < sizeof (buffer) - 1;
i++, s++)
buffer[i] = *s;
buffer[i] = 0;
}
new->value = str_dup (buffer);
debug_print (2, ("`%s' = `%s'\n", new->attribute ? new->attribute : "",
new->value ? new->value : ""));
/* Add this parameter to the list */
if (head) {
cur->next = new;
cur = cur->next;
}
else
head = cur = new;
}
else {
debug_print (1, ("parameter with no value: %s\n", s));
s = p;
}
/* Find the next parameter */
if (*s != ';' && (s = strchr (s, ';')) == NULL)
break; /* no more parameters */
do {
s++;
/* Move past any leading whitespace */
SKIPWS (s);
}
while (*s == ';'); /* skip empty parameters */
}
bail:
rfc2231_decode_parameters (&head);
return (head);
}
int mutt_check_mime_type (const char *s)
{
if (ascii_strcasecmp ("text", s) == 0)
return TYPETEXT;
else if (ascii_strcasecmp ("multipart", s) == 0)
return TYPEMULTIPART;
#ifdef SUN_ATTACHMENT
else if (ascii_strcasecmp ("x-sun-attachment", s) == 0)
return TYPEMULTIPART;
#endif
else if (ascii_strcasecmp ("application", s) == 0)
return TYPEAPPLICATION;
else if (ascii_strcasecmp ("message", s) == 0)
return TYPEMESSAGE;
else if (ascii_strcasecmp ("image", s) == 0)
return TYPEIMAGE;
else if (ascii_strcasecmp ("audio", s) == 0)
return TYPEAUDIO;
else if (ascii_strcasecmp ("video", s) == 0)
return TYPEVIDEO;
else if (ascii_strcasecmp ("model", s) == 0)
return TYPEMODEL;
else if (ascii_strcasecmp ("*", s) == 0)
return TYPEANY;
else if (ascii_strcasecmp (".*", s) == 0)
return TYPEANY;
else
return TYPEOTHER;
}
void mutt_parse_content_type (char *s, BODY * ct)
{
char *pc;
char *subtype;
mem_free (&ct->subtype);
mutt_free_parameter (&ct->parameter);
/* First extract any existing parameters */
if ((pc = strchr (s, ';')) != NULL) {
*pc++ = 0;
while (*pc && ISSPACE (*pc))
pc++;
ct->parameter = parse_parameters (pc);
/* Some pre-RFC1521 gateways still use the "name=filename" convention,
* but if a filename has already been set in the content-disposition,
* let that take precedence, and don't set it here */
if ((pc = mutt_get_parameter ("name", ct->parameter)) != 0
&& !ct->filename)
ct->filename = str_dup (pc);
#ifdef SUN_ATTACHMENT
/* this is deep and utter perversion */
if ((pc = mutt_get_parameter ("conversions", ct->parameter)) != 0)
ct->encoding = mutt_check_encoding (pc);
#endif
}
/* Now get the subtype */
if ((subtype = strchr (s, '/'))) {
*subtype++ = '\0';
for (pc = subtype; *pc && !ISSPACE (*pc) && *pc != ';'; pc++);
*pc = '\0';
ct->subtype = str_dup (subtype);
}
/* Finally, get the major type */
ct->type = mutt_check_mime_type (s);
#ifdef SUN_ATTACHMENT
if (ascii_strcasecmp ("x-sun-attachment", s) == 0)
ct->subtype = str_dup ("x-sun-attachment");
#endif
if (ct->type == TYPEOTHER) {
ct->xtype = str_dup (s);
}
if (ct->subtype == NULL) {
/* Some older non-MIME mailers (i.e., mailtool, elm) have a content-type
* field, so we can attempt to convert the type to BODY here.
*/
if (ct->type == TYPETEXT)
ct->subtype = str_dup ("plain");
else if (ct->type == TYPEAUDIO)
ct->subtype = str_dup ("basic");
else if (ct->type == TYPEMESSAGE)
ct->subtype = str_dup ("rfc822");
else if (ct->type == TYPEOTHER) {
char buffer[SHORT_STRING];
ct->type = TYPEAPPLICATION;
snprintf (buffer, sizeof (buffer), "x-%s", s);
ct->subtype = str_dup (buffer);
}
else
ct->subtype = str_dup ("x-unknown");
}
/* Default character set for text types. */
if (ct->type == TYPETEXT) {
if (!(pc = mutt_get_parameter ("charset", ct->parameter)))
mutt_set_parameter ("charset", option (OPTSTRICTMIME) ? "us-ascii" :
(const char *)
mutt_get_first_charset (AssumedCharset),
&ct->parameter);
}
}
static void parse_content_disposition (char *s, BODY * ct)
{
PARAMETER *parms;
if (!ascii_strncasecmp ("inline", s, 6))
ct->disposition = DISPINLINE;
else if (!ascii_strncasecmp ("form-data", s, 9))
ct->disposition = DISPFORMDATA;
else
ct->disposition = DISPATTACH;
/* Check to see if a default filename was given */
if ((s = strchr (s, ';')) != NULL) {
s++;
SKIPWS (s);
if ((s =
mutt_get_parameter ("filename",
(parms = parse_parameters (s)))) != 0)
str_replace (&ct->filename, s);
if ((s = mutt_get_parameter ("name", parms)) != 0)
ct->form_name = str_dup (s);
mutt_free_parameter (&parms);
}
}
/* args:
* fp stream to read from
*
* digest 1 if reading subparts of a multipart/digest, 0
* otherwise
*/
BODY *mutt_read_mime_header (FILE * fp, int digest)
{
BODY *p = mutt_new_body ();
char *c;
char *line = mem_malloc (LONG_STRING);
size_t linelen = LONG_STRING;
p->hdr_offset = ftello (fp);
p->encoding = ENC7BIT; /* default from RFC1521 */
p->type = digest ? TYPEMESSAGE : TYPETEXT;
p->disposition = DISPINLINE;
while (*(line = mutt_read_rfc822_line (fp, line, &linelen)) != 0) {
/* Find the value of the current header */
if ((c = strchr (line, ':'))) {
*c = 0;
c++;
SKIPWS (c);
if (!*c) {
debug_print (1, ("skipping empty header field: %s\n", line));
continue;
}
}
else {
debug_print (1, ("bogus MIME header: %s\n", line));
break;
}
if (!ascii_strncasecmp ("content-", line, 8)) {
if (!ascii_strcasecmp ("type", line + 8))
mutt_parse_content_type (c, p);
else if (!ascii_strcasecmp ("transfer-encoding", line + 8))
p->encoding = mutt_check_encoding (c);
else if (!ascii_strcasecmp ("disposition", line + 8))
parse_content_disposition (c, p);
else if (!ascii_strcasecmp ("description", line + 8)) {
str_replace (&p->description, c);
rfc2047_decode (&p->description);
}
}
#ifdef SUN_ATTACHMENT
else if (!ascii_strncasecmp ("x-sun-", line, 6)) {
if (!ascii_strcasecmp ("data-type", line + 6))
mutt_parse_content_type (c, p);
else if (!ascii_strcasecmp ("encoding-info", line + 6))
p->encoding = mutt_check_encoding (c);
else if (!ascii_strcasecmp ("content-lines", line + 6))
mutt_set_parameter ("content-lines", c, &(p->parameter));
else if (!ascii_strcasecmp ("data-description", line + 6)) {
str_replace (&p->description, c);
rfc2047_decode (&p->description);
}
}
#endif
}
p->offset = ftello (fp); /* Mark the start of the real data */
if (p->type == TYPETEXT && !p->subtype)
p->subtype = str_dup ("plain");
else if (p->type == TYPEMESSAGE && !p->subtype)
p->subtype = str_dup ("rfc822");
mem_free (&line);
return (p);
}
void mutt_parse_part (FILE * fp, BODY * b)
{
char *bound = 0;
switch (b->type) {
case TYPEMULTIPART:
#ifdef SUN_ATTACHMENT
if (!ascii_strcasecmp (b->subtype, "x-sun-attachment"))
bound = "--------";
else
#endif
bound = mutt_get_parameter ("boundary", b->parameter);
fseeko (fp, b->offset, SEEK_SET);
b->parts = mutt_parse_multipart (fp, bound,
b->offset + b->length,
ascii_strcasecmp ("digest",
b->subtype) == 0);
break;
case TYPEMESSAGE:
if (b->subtype) {
fseeko (fp, b->offset, SEEK_SET);
if (mutt_is_message_type (b->type, b->subtype))
b->parts = mutt_parse_messageRFC822 (fp, b);
else if (ascii_strcasecmp (b->subtype, "external-body") == 0)
b->parts = mutt_read_mime_header (fp, 0);
else
return;
}
break;
default:
return;
}
/* try to recover from parsing error */
if (!b->parts) {
b->type = TYPETEXT;
str_replace (&b->subtype, "plain");
}
}
/* parse a MESSAGE/RFC822 body
*
* args:
* fp stream to read from
*
* parent structure which contains info about the message/rfc822
* body part
*
* NOTE: this assumes that `parent->length' has been set!
*/
BODY *mutt_parse_messageRFC822 (FILE * fp, BODY * parent)
{
BODY *msg;
parent->hdr = mutt_new_header ();
parent->hdr->offset = ftello (fp);
parent->hdr->env = mutt_read_rfc822_header (fp, parent->hdr, 0, 0);
msg = parent->hdr->content;
/* ignore the length given in the content-length since it could be wrong
and we already have the info to calculate the correct length */
/* if (msg->length == -1) */
msg->length = parent->length - (msg->offset - parent->offset);
/* if body of this message is empty, we can end up with a negative length */
if (msg->length < 0)
msg->length = 0;
mutt_parse_part (fp, msg);
return (msg);
}
/* parse a multipart structure
*
* args:
* fp stream to read from
*
* boundary body separator
*
* end_off length of the multipart body (used when the final
* boundary is missing to avoid reading too far)
*
* digest 1 if reading a multipart/digest, 0 otherwise
*/
BODY *mutt_parse_multipart (FILE * fp, const char *boundary, LOFF_T end_off,
int digest)
{
#ifdef SUN_ATTACHMENT
int lines;
#endif
int blen, len, crlf = 0;
char buffer[LONG_STRING];
BODY *head = 0, *last = 0, *new = 0;
int i;
int final = 0; /* did we see the ending boundary? */
if (!boundary) {
mutt_error _("multipart message has no boundary parameter!");
return (NULL);
}
blen = str_len (boundary);
while (ftello (fp) < end_off && fgets (buffer, LONG_STRING, fp) != NULL) {
len = str_len (buffer);
crlf = (len > 1 && buffer[len - 2] == '\r') ? 1 : 0;
if (buffer[0] == '-' && buffer[1] == '-' &&
str_ncmp (buffer + 2, boundary, blen) == 0) {
if (last) {
last->length = ftello (fp) - last->offset - len - 1 - crlf;
if (last->parts && last->parts->length == 0)
last->parts->length =
ftello (fp) - last->parts->offset - len - 1 - crlf;
/* if the body is empty, we can end up with a -1 length */
if (last->length < 0)
last->length = 0;
}
/* Remove any trailing whitespace, up to the length of the boundary */
for (i = len - 1; ISSPACE (buffer[i]) && i >= blen + 2; i--)
buffer[i] = 0;
/* Check for the end boundary */
if (str_cmp (buffer + blen + 2, "--") == 0) {
final = 1;
break; /* done parsing */
}
else if (buffer[2 + blen] == 0) {
new = mutt_read_mime_header (fp, digest);
#ifdef SUN_ATTACHMENT
if (mutt_get_parameter ("content-lines", new->parameter)) {
for (lines =
atoi (mutt_get_parameter ("content-lines", new->parameter));
lines; lines--)
if (ftello (fp) >= end_off
|| fgets (buffer, LONG_STRING, fp) == NULL)
break;
}
#endif
/*
* Consistency checking - catch
* bad attachment end boundaries
*/
if (new->offset > end_off) {
mutt_free_body (&new);
break;
}
if (head) {
last->next = new;
last = new;
}
else
last = head = new;
}
}
}
/* in case of missing end boundary, set the length to something reasonable */
if (last && last->length == 0 && !final)
last->length = end_off - last->offset;
/* parse recursive MIME parts */
for (last = head; last; last = last->next)
mutt_parse_part (fp, last);
return (head);
}
static const char *uncomment_timezone (char *buf, size_t buflen,
const char *tz)
{
char *p;
size_t len;
if (*tz != '(')
return tz; /* no need to do anything */
tz++;
SKIPWS (tz);
if ((p = strpbrk (tz, " )")) == NULL)
return tz;
len = p - tz;
if (len > buflen - 1)
len = buflen - 1;
memcpy (buf, tz, len);
buf[len] = 0;
return buf;
}
static struct tz_t {
char tzname[5];
unsigned char zhours;
unsigned char zminutes;
unsigned char zoccident; /* west of UTC? */
} TimeZones[] = {
{
"aat", 1, 0, 1}, /* Atlantic Africa Time */
{
"adt", 4, 0, 0}, /* Arabia DST */
{
"ast", 3, 0, 0}, /* Arabia */
/*{ "ast", 4, 0, 1 }, *//* Atlantic */
{
"bst", 1, 0, 0}, /* British DST */
{
"cat", 1, 0, 0}, /* Central Africa */
{
"cdt", 5, 0, 1}, {
"cest", 2, 0, 0}, /* Central Europe DST */
{
"cet", 1, 0, 0}, /* Central Europe */
{
"cst", 6, 0, 1},
/*{ "cst", 8, 0, 0 }, *//* China */
/*{ "cst", 9, 30, 0 }, *//* Australian Central Standard Time */
{
"eat", 3, 0, 0}, /* East Africa */
{
"edt", 4, 0, 1}, {
"eest", 3, 0, 0}, /* Eastern Europe DST */
{
"eet", 2, 0, 0}, /* Eastern Europe */
{
"egst", 0, 0, 0}, /* Eastern Greenland DST */
{
"egt", 1, 0, 1}, /* Eastern Greenland */
{
"est", 5, 0, 1}, {
"gmt", 0, 0, 0}, {
"gst", 4, 0, 0}, /* Presian Gulf */
{
"hkt", 8, 0, 0}, /* Hong Kong */
{
"ict", 7, 0, 0}, /* Indochina */
{
"idt", 3, 0, 0}, /* Israel DST */
{
"ist", 2, 0, 0}, /* Israel */
/*{ "ist", 5, 30, 0 }, *//* India */
{
"jst", 9, 0, 0}, /* Japan */
{
"kst", 9, 0, 0}, /* Korea */
{
"mdt", 6, 0, 1}, {
"met", 1, 0, 0}, /* this is now officially CET */
{
"msd", 4, 0, 0}, /* Moscow DST */
{
"msk", 3, 0, 0}, /* Moscow */
{
"mst", 7, 0, 1}, {
"nzdt", 13, 0, 0}, /* New Zealand DST */
{
"nzst", 12, 0, 0}, /* New Zealand */
{
"pdt", 7, 0, 1}, {
"pst", 8, 0, 1}, {
"sat", 2, 0, 0}, /* South Africa */
{
"smt", 4, 0, 0}, /* Seychelles */
{
"sst", 11, 0, 1}, /* Samoa */
/*{ "sst", 8, 0, 0 }, *//* Singapore */
{
"utc", 0, 0, 0}, {
"wat", 0, 0, 0}, /* West Africa */
{
"west", 1, 0, 0}, /* Western Europe DST */
{
"wet", 0, 0, 0}, /* Western Europe */
{
"wgst", 2, 0, 1}, /* Western Greenland DST */
{
"wgt", 3, 0, 1}, /* Western Greenland */
{
"wst", 8, 0, 0}, /* Western Australia */
};
/* parses a date string in RFC822 format:
*
* Date: [ weekday , ] day-of-month month year hour:minute:second timezone
*
* This routine assumes that `h' has been initialized to 0. the `timezone'
* field is optional, defaulting to +0000 if missing.
*/
time_t mutt_parse_date (const char *s, HEADER * h)
{
int count = 0;
char *t;
int hour, min, sec;
struct tm tm;
int i;
int tz_offset = 0;
int zhours = 0;
int zminutes = 0;
int zoccident = 0;
const char *ptz;
char tzstr[SHORT_STRING];
char scratch[SHORT_STRING];
/* Don't modify our argument. Fixed-size buffer is ok here since
* the date format imposes a natural limit.
*/
strfcpy (scratch, s, sizeof (scratch));
/* kill the day of the week, if it exists. */
if ((t = strchr (scratch, ',')))
t++;
else
t = scratch;
SKIPWS (t);
memset (&tm, 0, sizeof (tm));
while ((t = strtok (t, " \t")) != NULL) {
switch (count) {
case 0: /* day of the month */
if (!isdigit ((unsigned char) *t))
return (-1);
tm.tm_mday = atoi (t);
if (tm.tm_mday > 31)
return (-1);
break;
case 1: /* month of the year */
if ((i = mutt_check_month (t)) < 0)
return (-1);
tm.tm_mon = i;
break;
case 2: /* year */
tm.tm_year = atoi (t);
if (tm.tm_year < 50)
tm.tm_year += 100;
else if (tm.tm_year >= 1900)
tm.tm_year -= 1900;
break;
case 3: /* time of day */
if (sscanf (t, "%d:%d:%d", &hour, &min, &sec) == 3);
else if (sscanf (t, "%d:%d", &hour, &min) == 2)
sec = 0;
else {
debug_print (1, ("could not process time format: %s\n", t));
return (-1);
}
tm.tm_hour = hour;
tm.tm_min = min;
tm.tm_sec = sec;
break;
case 4: /* timezone */
/* sometimes we see things like (MST) or (-0700) so attempt to
* compensate by uncommenting the string if non-RFC822 compliant
*/
ptz = uncomment_timezone (tzstr, sizeof (tzstr), t);
if (*ptz == '+' || *ptz == '-') {
if (ptz[1] && ptz[2] && ptz[3] && ptz[4]
&& isdigit ((unsigned char) ptz[1])
&& isdigit ((unsigned char) ptz[2])
&& isdigit ((unsigned char) ptz[3])
&& isdigit ((unsigned char) ptz[4])) {
zhours = (ptz[1] - '0') * 10 + (ptz[2] - '0');
zminutes = (ptz[3] - '0') * 10 + (ptz[4] - '0');
if (ptz[0] == '-')
zoccident = 1;
}
}
else {
struct tz_t *tz;
tz = bsearch (ptz, TimeZones, sizeof TimeZones / sizeof (struct tz_t),
sizeof (struct tz_t),
(int (*)(const void *, const void *)) ascii_strcasecmp
/* This is safe to do: A pointer to a struct equals
* a pointer to its first element*/ );
if (tz) {
zhours = tz->zhours;
zminutes = tz->zminutes;
zoccident = tz->zoccident;
}
/* ad hoc support for the European MET (now officially CET) TZ */
if (ascii_strcasecmp (t, "MET") == 0) {
if ((t = strtok (NULL, " \t")) != NULL) {
if (!ascii_strcasecmp (t, "DST"))
zhours++;
}
}
}
tz_offset = zhours * 3600 + zminutes * 60;
if (!zoccident)
tz_offset = -tz_offset;
break;
}
count++;
t = 0;
}
if (count < 4) { /* don't check for missing timezone */
debug_print (1, ("error parsing date format, using received time\n"));
return (-1);
}
if (h) {
h->zhours = zhours;
h->zminutes = zminutes;
h->zoccident = zoccident;
}
return (mutt_mktime (&tm, 0) + tz_offset);
}
/* extract the first substring that looks like a message-id */
static char *extract_message_id (const char *s)
{
const char *p;
char *r;
size_t l;
if ((s = strchr (s, '<')) == NULL || (p = strchr (s, '>')) == NULL)
return (NULL);
l = (size_t) (p - s) + 1;
r = mem_malloc (l + 1);
memcpy (r, s, l);
r[l] = 0;
return (r);
}
void mutt_parse_mime_message (CONTEXT * ctx, HEADER * cur)
{
MESSAGE *msg;
int flags = 0;
do {
if (cur->content->type != TYPEMESSAGE
&& cur->content->type != TYPEMULTIPART)
break; /* nothing to do */
if (cur->content->parts)
break; /* The message was parsed earlier. */
if ((msg = mx_open_message (ctx, cur->msgno))) {
mutt_parse_part (msg->fp, cur->content);
if (WithCrypto)
cur->security = crypt_query (cur->content);
mx_close_message (&msg);
}
} while (0);
mutt_count_body_parts (cur, flags | M_PARTS_RECOUNT);
}
int mutt_parse_rfc822_line (ENVELOPE * e, HEADER * hdr, char *line, char *p,
short user_hdrs, short weed, short do_2047,
LIST ** lastp)
{
int matched = 0;
LIST *last = NULL;
if (lastp)
last = *lastp;
switch (ascii_tolower (line[0])) {
case 'a':
if (ascii_strcasecmp (line + 1, "pparently-to") == 0) {
e->to = rfc822_parse_adrlist (e->to, p);
matched = 1;
}
else if (ascii_strcasecmp (line + 1, "pparently-from") == 0) {
e->from = rfc822_parse_adrlist (e->from, p);
matched = 1;
}
break;
case 'b':
if (ascii_strcasecmp (line + 1, "cc") == 0) {
e->bcc = rfc822_parse_adrlist (e->bcc, p);
matched = 1;
}
break;
case 'c':
if (ascii_strcasecmp (line + 1, "c") == 0) {
e->cc = rfc822_parse_adrlist (e->cc, p);
matched = 1;
}
else if (ascii_strncasecmp (line + 1, "ontent-", 7) == 0) {
if (ascii_strcasecmp (line + 8, "type") == 0) {
if (hdr)
mutt_parse_content_type (p, hdr->content);
matched = 1;
}
else if (ascii_strcasecmp (line + 8, "transfer-encoding") == 0) {
if (hdr)
hdr->content->encoding = mutt_check_encoding (p);
matched = 1;
}
else if (ascii_strcasecmp (line + 8, "length") == 0) {
if (hdr) {
if ((hdr->content->length = atoi (p)) < 0)
hdr->content->length = -1;
}
matched = 1;
}
else if (ascii_strcasecmp (line + 8, "description") == 0) {
if (hdr) {
str_replace (&hdr->content->description, p);
rfc2047_decode (&hdr->content->description);
}
matched = 1;
}
else if (ascii_strcasecmp (line + 8, "disposition") == 0) {
if (hdr)
parse_content_disposition (p, hdr->content);
matched = 1;
}
}
break;
case 'd':
if (!ascii_strcasecmp ("ate", line + 1)) {
str_replace (&e->date, p);
if (hdr)
hdr->date_sent = mutt_parse_date (p, hdr);
matched = 1;
}
break;
case 'e':
if (!ascii_strcasecmp ("xpires", line + 1) &&
hdr && mutt_parse_date (p, NULL) < time (NULL))
hdr->expired = 1;
break;
case 'f':
if (!ascii_strcasecmp ("rom", line + 1)) {
e->from = rfc822_parse_adrlist (e->from, p);
/* don't leave from info NULL if there's an invalid address (or
* whatever) in From: field; mutt would just display it as empty
* and mark mail/(esp.) news article as your own. aaargh! this
* bothered me for _years_ */
if (!e->from) {
e->from = rfc822_new_address ();
e->from->personal = str_dup (p);
}
matched = 1;
}
#ifdef USE_NNTP
else if (!str_casecmp (line + 1, "ollowup-to")) {
if (!e->followup_to) {
str_skip_trailws (p);
e->followup_to = str_dup (str_skip_initws (p));
}
matched = 1;
}
#endif
break;
case 'i':
if (!ascii_strcasecmp (line + 1, "n-reply-to")) {
mutt_free_list (&e->in_reply_to);
e->in_reply_to = mutt_parse_references (p, 1);
matched = 1;
}
break;
case 'l':
if (!ascii_strcasecmp (line + 1, "ines")) {
if (hdr) {
hdr->lines = atoi (p);
/*
* HACK - mutt has, for a very short time, produced negative
* Lines header values. Ignore them.
*/
if (hdr->lines < 0)
hdr->lines = 0;
}
matched = 1;
}
else if (!ascii_strcasecmp (line + 1, "ist-Post")) {
/* RFC 2369. FIXME: We should ignore whitespace, but don't. */
if (strncmp (p, "NO", 2)) {
char *beg, *end;
for (beg = strchr (p, '<'); beg; beg = strchr (end, ',')) {
++beg;
if (!(end = strchr (beg, '>')))
break;
/* Take the first mailto URL */
if (url_check_scheme (beg) == U_MAILTO) {
mem_free (&e->list_post);
e->list_post = str_substrdup (beg, end);
break;
}
}
}
matched = 1;
}
break;
case 'm':
if (!ascii_strcasecmp (line + 1, "ime-version")) {
if (hdr)
hdr->mime = 1;
matched = 1;
}
else if (!ascii_strcasecmp (line + 1, "essage-id")) {
/* We add a new "Message-ID:" when building a message */
mem_free (&e->message_id);
e->message_id = extract_message_id (p);
matched = 1;
}
else if (!ascii_strncasecmp (line + 1, "ail-", 4)) {
if (!ascii_strcasecmp (line + 5, "reply-to")) {
/* override the Reply-To: field */
rfc822_free_address (&e->reply_to);
e->reply_to = rfc822_parse_adrlist (e->reply_to, p);
matched = 1;
}
else if (!ascii_strcasecmp (line + 5, "followup-to")) {
e->mail_followup_to = rfc822_parse_adrlist (e->mail_followup_to, p);
matched = 1;
}
}
break;
#ifdef USE_NNTP
case 'n':
if (!str_casecmp (line + 1, "ewsgroups")) {
mem_free (&e->newsgroups);
str_skip_trailws (p);
e->newsgroups = str_dup (str_skip_initws (p));
matched = 1;
}
break;
#endif
case 'o':
/* field `Organization:' saves only for pager! */
if (!str_casecmp (line + 1, "rganization")) {
if (!e->organization && str_casecmp (p, "unknown"))
e->organization = str_dup (p);
}
break;
case 'r':
if (!ascii_strcasecmp (line + 1, "eferences")) {
mutt_free_list (&e->references);
e->references = mutt_parse_references (p, 0);
matched = 1;
}
else if (!ascii_strcasecmp (line + 1, "eply-to")) {
e->reply_to = rfc822_parse_adrlist (e->reply_to, p);
matched = 1;
}
else if (!ascii_strcasecmp (line + 1, "eturn-path")) {
e->return_path = rfc822_parse_adrlist (e->return_path, p);
matched = 1;
}
else if (!ascii_strcasecmp (line + 1, "eceived")) {
if (hdr && !hdr->received) {
char *d = strchr (p, ';');
if (d)
hdr->received = mutt_parse_date (d + 1, NULL);
}
}
break;
case 's':
if (!ascii_strcasecmp (line + 1, "ubject")) {
if (!e->subject)
e->subject = str_dup (p);
matched = 1;
}
else if (!ascii_strcasecmp (line + 1, "ender")) {
e->sender = rfc822_parse_adrlist (e->sender, p);
matched = 1;
}
else if (!ascii_strcasecmp (line + 1, "tatus")) {
if (hdr) {
while (*p) {
switch (*p) {
case 'r':
hdr->replied = 1;
break;
case 'O':
hdr->old = 1;
break;
case 'R':
hdr->read = 1;
break;
}
p++;
}
}
matched = 1;
}
else if ((!ascii_strcasecmp ("upersedes", line + 1) ||
!ascii_strcasecmp ("upercedes", line + 1)) && hdr)
e->supersedes = str_dup (p);
break;
case 't':
if (ascii_strcasecmp (line + 1, "o") == 0) {
e->to = rfc822_parse_adrlist (e->to, p);
matched = 1;
}
break;
case 'x':
if (ascii_strcasecmp (line + 1, "-status") == 0) {
if (hdr) {
while (*p) {
switch (*p) {
case 'A':
hdr->replied = 1;
break;
case 'D':
hdr->deleted = 1;
break;
case 'F':
hdr->flagged = 1;
break;
default:
break;
}
p++;
}
}
matched = 1;
}
else if (ascii_strcasecmp (line + 1, "-label") == 0) {
e->x_label = str_dup (p);
matched = 1;
}
#ifdef USE_NNTP
else if (!str_casecmp (line + 1, "-comment-to")) {
if (!e->x_comment_to)
e->x_comment_to = str_dup (p);
matched = 1;
}
else if (!str_casecmp (line + 1, "ref")) {
if (!e->xref)
e->xref = str_dup (p);
matched = 1;
}
#endif
default:
break;
}
/* Keep track of the user-defined headers */
if (!matched && user_hdrs) {
/* restore the original line */
line[str_len (line)] = ':';
if (weed && option (OPTWEED) && mutt_matches_ignore (line, Ignore)
&& !mutt_matches_ignore (line, UnIgnore))
goto done;
if (last) {
last->next = mutt_new_list ();
last = last->next;
}
else
last = e->userhdrs = mutt_new_list ();
last->data = str_dup (line);
if (do_2047)
rfc2047_decode (&last->data);
}
done:
*lastp = last;
return matched;
}
/* mutt_read_rfc822_header() -- parses a RFC822 header
*
* Args:
*
* f stream to read from
*
* hdr header structure of current message (optional).
*
* user_hdrs If set, store user headers. Used for recall-message and
* postpone modes.
*
* weed If this parameter is set and the user has activated the
* $weed option, honor the header weed list for user headers.
* Used for recall-message.
*
* Returns: newly allocated envelope structure. You should free it by
* mutt_free_envelope() when envelope stay unneeded.
*/
ENVELOPE *mutt_read_rfc822_header (FILE * f, HEADER * hdr, short user_hdrs,
short weed)
{
ENVELOPE *e = mutt_new_envelope ();
LIST *last = NULL;
char *line = mem_malloc (LONG_STRING);
char *p;
LOFF_T loc;
int matched;
size_t linelen = LONG_STRING;
char buf[LONG_STRING + 1];
if (hdr) {
if (hdr->content == NULL) {
hdr->content = mutt_new_body ();
/* set the defaults from RFC1521 */
hdr->content->type = TYPETEXT;
hdr->content->subtype = str_dup ("plain");
hdr->content->encoding = ENC7BIT;
hdr->content->length = -1;
/* RFC 2183 says this is arbitrary */
hdr->content->disposition = DISPINLINE;
}
}
while ((loc = ftello (f)),
*(line = mutt_read_rfc822_line (f, line, &linelen)) != 0) {
matched = 0;
if ((p = strpbrk (line, ": \t")) == NULL || *p != ':') {
char return_path[LONG_STRING];
time_t t;
/* some bogus MTAs will quote the original "From " line */
if (str_ncmp (">From ", line, 6) == 0)
continue; /* just ignore */
else if (is_from (line, return_path, sizeof (return_path), &t)) {
/* MH somtimes has the From_ line in the middle of the header! */
if (hdr && !hdr->received)
hdr->received = t - mutt_local_tz (t);
continue;
}
fseeko (f, loc, 0);
break; /* end of header */
}
*buf = '\0';
if (mutt_match_spam_list (line, SpamList, buf, sizeof (buf))) {
if (!rx_list_match (NoSpamList, line)) {
/* if spam tag already exists, figure out how to amend it */
if (e->spam && *buf) {
/* If SpamSep defined, append with separator */
if (SpamSep) {
mutt_buffer_addstr (e->spam, SpamSep);
mutt_buffer_addstr (e->spam, buf);
}
/* else overwrite */
else {
e->spam->dptr = e->spam->data;
*e->spam->dptr = '\0';
mutt_buffer_addstr (e->spam, buf);
}
}
/* spam tag is new, and match expr is non-empty; copy */
else if (!e->spam && *buf) {
e->spam = mutt_buffer_from (NULL, buf);
}
/* match expr is empty; plug in null string if no existing tag */
else if (!e->spam) {
e->spam = mutt_buffer_from (NULL, "");
}
if (e->spam && e->spam->data)
debug_print (5, ("spam = %s\n", e->spam->data));
}
}
*p = 0;
p++;
SKIPWS (p);
if (!*p)
continue; /* skip empty header fields */
matched =
mutt_parse_rfc822_line (e, hdr, line, p, user_hdrs, weed, 1, &last);
}
mem_free (&line);
if (hdr) {
hdr->content->hdr_offset = hdr->offset;
hdr->content->offset = ftello (f);
rfc2047_decode_envelope (e);
/* check for missing or invalid date */
if (hdr->date_sent <= 0) {
debug_print (1, ("no date found, using received "
"time from msg separator\n"));
hdr->date_sent = hdr->received;
}
}
return (e);
}
ADDRESS *mutt_parse_adrlist (ADDRESS * p, const char *s)
{
const char *q;
/* check for a simple whitespace separated list of addresses */
if ((q = strpbrk (s, "\"<>():;,\\")) == NULL) {
char tmp[HUGE_STRING];
char *r;
strfcpy (tmp, s, sizeof (tmp));
r = tmp;
while ((r = strtok (r, " \t")) != NULL) {
p = rfc822_parse_adrlist (p, r);
r = NULL;
}
}
else
p = rfc822_parse_adrlist (p, s);
return p;
}
/* Compares mime types to the ok and except lists */
int count_body_parts_check(LIST **checklist, BODY *b, int dflt) {
LIST *type;
ATTACH_MATCH *a;
/* If list is null, use default behavior. */
if (! *checklist) {
/*return dflt;*/
return 0;
}
for (type = *checklist; type; type = type->next) {
a = (ATTACH_MATCH *)type->data;
debug_print(5, ("cbpc: %s %d/%s ?? %s/%s [%d]... ",
dflt ? "[OK] " : "[EXCL] ",
b->type, b->subtype, a->major, a->minor, a->major_int));
if ((a->major_int == TYPEANY || a->major_int == b->type) &&
!regexec(&a->minor_rx, b->subtype, 0, NULL, 0)) {
debug_print(5, ("yes\n"));
return 1;
} else {
debug_print(5, ("no\n"));
}
}
return 0;
}
#define AT_COUNT(why) { shallcount = 1; }
#define AT_NOCOUNT(why) { shallcount = 0; }
int count_body_parts (BODY *body, int flags) {
int count = 0;
int shallcount, shallrecurse;
BODY *bp;
if (body == NULL)
return 0;
for (bp = body; bp != NULL; bp = bp->next) {
/* Initial disposition is to count and not to recurse this part. */
AT_COUNT("default");
shallrecurse = 0;
debug_print(5, ("bp: desc=\"%s\"; fn=\"%s\", type=\"%d/%s\"\n",
bp->description ? bp->description : ("none"),
bp->filename ? bp->filename :
bp->d_filename ? bp->d_filename : "(none)",
bp->type, bp->subtype ? bp->subtype : "*"));
if (bp->type == TYPEMESSAGE) {
shallrecurse = 1;
/* If it's an external body pointer, don't recurse it. */
if (!ascii_strcasecmp (bp->subtype, "external-body"))
shallrecurse = 0;
/* Don't count containers if they're top-level. */
if (flags & M_PARTS_TOPLEVEL)
AT_NOCOUNT("top-level message/*");
} else if (bp->type == TYPEMULTIPART) {
/* Always recurse multiparts, except multipart/alternative. */
shallrecurse = 1;
if (!str_casecmp(bp->subtype, "alternative"))
shallrecurse = 0;
/* Don't count containers if they're top-level. */
if (flags & M_PARTS_TOPLEVEL)
AT_NOCOUNT("top-level multipart");
}
if (bp->disposition == DISPINLINE &&
bp->type != TYPEMULTIPART && bp->type != TYPEMESSAGE && bp == body)
AT_NOCOUNT("ignore fundamental inlines");
/* If this body isn't scheduled for enumeration already, don't bother
* profiling it further. */
if (shallcount) {
/* Turn off shallcount if message type is not in ok list,
* or if it is in except list. Check is done separately for
* inlines vs. attachments.
*/
if (bp->disposition == DISPATTACH) {
if (!count_body_parts_check(&AttachAllow, bp, 1))
AT_NOCOUNT("attach not allowed");
if (count_body_parts_check(&AttachExclude, bp, 0))
AT_NOCOUNT("attach excluded");
} else {
if (!count_body_parts_check(&InlineAllow, bp, 1))
AT_NOCOUNT("inline not allowed");
if (count_body_parts_check(&InlineExclude, bp, 0))
AT_NOCOUNT("excluded");
}
}
if (shallcount)
count++;
bp->attach_qualifies = shallcount ? 1 : 0;
debug_print(5, ("cbp: %08x shallcount = %d\n", (unsigned int)bp, shallcount));
if (shallrecurse) {
debug_print(5, ("cbp: %08x pre count = %d\n", (unsigned int)bp, count));
bp->attach_count = count_body_parts(bp->parts, flags & ~M_PARTS_TOPLEVEL);
count += bp->attach_count;
debug_print(5, ("cbp: %08x post count = %d\n", (unsigned int)bp, count));
}
}
debug_print(5, ("bp: return %d\n", count < 0 ? 0 : count));
return count < 0 ? 0 : count;
}
int mutt_count_body_parts (HEADER *hdr, int flags) {
if (!option (OPTCOUNTATTACH))
return (0);
if (hdr->attach_valid && !(flags & M_PARTS_RECOUNT))
return hdr->attach_total;
if (AttachAllow || AttachExclude || InlineAllow || InlineExclude)
hdr->attach_total = count_body_parts(hdr->content, flags | M_PARTS_TOPLEVEL);
else
hdr->attach_total = 0;
hdr->attach_valid = 1;
return hdr->attach_total;
}
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