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/*
* Copyright (C) 1996-2000 Michael R. Elkins <me@mutt.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#if HAVE_CONFIG_H
# include "config.h"
#endif
#include "mutt.h"
#include "mutt_regex.h"
#include "mailbox.h"
#include "mime.h"
#include "rfc2047.h"
#include "rfc2231.h"
#include "mutt_crypt.h"
#include "url.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;
int 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 += strlen (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;
safe_realloc (&line, *linelen);
buf = line + offset;
}
}
/* not reached */
}
static LIST *mutt_parse_references (char *s, int in_reply_to)
{
LIST *t, *lst = NULL;
char *m;
const char *sp;
m = mutt_extract_message_id (s, &sp);
while (m)
{
t = safe_malloc (sizeof (LIST));
t->data = m;
t->next = lst;
lst = t;
m = mutt_extract_message_id (NULL, &sp);
}
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;
dprint (2, (debugfile, "parse_parameters: `%s'\n", s));
while (*s)
{
if ((p = strpbrk (s, "=;")) == NULL)
{
dprint(1, (debugfile, "parse_parameters: 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 = safe_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 (AssumedCharset && *AssumedCharset) {
/* 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 = safe_strdup (buffer);
dprint (2, (debugfile, "parse_parameter: `%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
{
dprint (1, (debugfile, "parse_parameters(): 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;
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)) && !ct->filename)
ct->filename = safe_strdup(pc);
#ifdef SUN_ATTACHMENT
/* this is deep and utter perversion */
if ((pc = mutt_get_parameter ("conversions", ct->parameter)))
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 = safe_strdup (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 = safe_strdup ("x-sun-attachment");
#endif
if (ct->type == TYPEOTHER)
{
ct->xtype = safe_strdup (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 = safe_strdup ("plain");
else if (ct->type == TYPEAUDIO)
ct->subtype = safe_strdup ("basic");
else if (ct->type == TYPEMESSAGE)
ct->subtype = safe_strdup ("rfc822");
else if (ct->type == TYPEOTHER)
{
char buffer[SHORT_STRING];
ct->type = TYPEAPPLICATION;
snprintf (buffer, sizeof (buffer), "x-%s", s);
ct->subtype = safe_strdup (buffer);
}
else
ct->subtype = safe_strdup ("x-unknown");
}
/* Default character set for text types. */
if (ct->type == TYPETEXT)
{
if (!(pc = mutt_get_parameter ("charset", ct->parameter)))
mutt_set_parameter ("charset", (AssumedCharset && *AssumedCharset) ?
(const char *) mutt_get_default_charset ()
: "us-ascii", &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)))))
mutt_str_replace (&ct->filename, s);
if ((s = mutt_get_parameter ("name", parms)))
ct->form_name = safe_strdup (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 = safe_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)
{
dprint (1, (debugfile, "mutt_read_mime_header(): skipping empty header field: %s\n", line));
continue;
}
}
else
{
dprint (1, (debugfile, "read_mime_header: 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))
{
mutt_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))
{
mutt_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 = safe_strdup ("plain");
else if (p->type == TYPEMESSAGE && !p->subtype)
p->subtype = safe_strdup ("rfc822");
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;
mutt_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 = mutt_strlen (boundary);
while (ftello (fp) < end_off && fgets (buffer, LONG_STRING, fp) != NULL)
{
len = mutt_strlen (buffer);
crlf = (len > 1 && buffer[len - 2] == '\r') ? 1 : 0;
if (buffer[0] == '-' && buffer[1] == '-' &&
mutt_strncmp (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 (mutt_strcmp (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)) {
mutt_atoi (mutt_get_parameter ("content-lines", new->parameter), &lines);
for ( ; 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 const 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 (mutt_atoi (t, &tm.tm_mday) < 0 || tm.tm_mday < 0)
return (-1);
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 */
if (mutt_atoi (t, &tm.tm_year) < 0 || tm.tm_year < 0)
return (-1);
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
{
dprint(1, (debugfile, "parse_date: 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 */
{
dprint(1,(debugfile, "parse_date(): 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.
* call back with NULL for more (like strtok).
*/
char *mutt_extract_message_id (const char *s, const char **saveptr)
{
const char *o, *onull, *p;
char *ret = NULL;
if (s)
p = s;
else if (saveptr)
p = *saveptr;
else
return NULL;
for (s = NULL, o = NULL, onull = NULL;
(p = strpbrk (p, "<> \t;")) != NULL; ++p)
{
if (*p == '<')
{
s = p;
o = onull = NULL;
continue;
}
if (!s)
continue;
if (*p == '>')
{
size_t olen = onull - o, slen = p - s + 1;
ret = safe_malloc (olen + slen + 1);
if (o)
memcpy (ret, o, olen);
memcpy (ret + olen, s, slen);
ret[olen + slen] = '\0';
if (saveptr)
*saveptr = p + 1; /* next call starts after '>' */
return ret;
}
/* some idiotic clients break their message-ids between lines */
if (s == p)
/* step past another whitespace */
s = p + 1;
else if (o)
/* more than two lines, give up */
s = o = onull = NULL;
else
{
/* remember the first line, start looking for the second */
o = s;
onull = p;
s = p + 1;
}
}
return NULL;
}
void mutt_parse_mime_message (CONTEXT *ctx, HEADER *cur)
{
MESSAGE *msg;
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);
cur->attach_valid = 0;
}
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 = atol (p)) < 0)
hdr->content->length = -1;
}
matched = 1;
}
else if (ascii_strcasecmp (line+8, "description") == 0)
{
if (hdr)
{
mutt_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))
{
mutt_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);
matched = 1;
}
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)
{
/*
* HACK - mutt has, for a very short time, produced negative
* Lines header values. Ignore them.
*/
if (mutt_atoi (p, &hdr->lines) < 0 || 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)
{
FREE (&e->list_post);
e->list_post = mutt_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 */
FREE (&e->message_id);
e->message_id = mutt_extract_message_id (p, NULL);
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;
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 = safe_strdup (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 = safe_strdup (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 = safe_strdup(p);
matched = 1;
}
default:
break;
}
/* Keep track of the user-defined headers */
if (!matched && user_hdrs)
{
/* restore the original line */
line[strlen (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 = safe_strdup (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 = safe_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 = safe_strdup ("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 (mutt_strncmp (">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 (!mutt_match_rx_list(line, NoSpamList))
{
/* 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)
dprint(5, (debugfile, "p822: 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);
}
FREE (&line);
if (hdr)
{
hdr->content->hdr_offset = hdr->offset;
hdr->content->offset = ftello (f);
/* do RFC2047 decoding */
rfc2047_decode_adrlist (e->from);
rfc2047_decode_adrlist (e->to);
rfc2047_decode_adrlist (e->cc);
rfc2047_decode_adrlist (e->bcc);
rfc2047_decode_adrlist (e->reply_to);
rfc2047_decode_adrlist (e->mail_followup_to);
rfc2047_decode_adrlist (e->return_path);
rfc2047_decode_adrlist (e->sender);
rfc2047_decode (&e->x_label);
if (e->subject)
{
regmatch_t pmatch[1];
rfc2047_decode (&e->subject);
if (regexec (ReplyRegexp.rx, e->subject, 1, pmatch, 0) == 0)
e->real_subj = e->subject + pmatch[0].rm_eo;
else
e->real_subj = e->subject;
}
/* check for missing or invalid date */
if (hdr->date_sent <= 0)
{
dprint(1,(debugfile,"read_rfc822_header(): 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 */
static 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;
dprint(5, (debugfile, "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))
{
dprint(5, (debugfile, "yes\n"));
return 1;
}
else
{
dprint(5, (debugfile, "no\n"));
}
}
return 0;
}
#define AT_COUNT(why) { shallcount = 1; }
#define AT_NOCOUNT(why) { shallcount = 0; }
static 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;
dprint(5, (debugfile, "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 (!ascii_strcasecmp(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;
dprint(5, (debugfile, "cbp: %p shallcount = %d\n", (void *)bp, shallcount));
if (shallrecurse)
{
dprint(5, (debugfile, "cbp: %p pre count = %d\n", (void *)bp, count));
bp->attach_count = count_body_parts(bp->parts, flags & ~M_PARTS_TOPLEVEL);
count += bp->attach_count;
dprint(5, (debugfile, "cbp: %p post count = %d\n", (void *)bp, count));
}
}
dprint(5, (debugfile, "bp: return %d\n", count < 0 ? 0 : count));
return count < 0 ? 0 : count;
}
int mutt_count_body_parts (CONTEXT *ctx, HEADER *hdr)
{
short keep_parts = 0;
if (hdr->attach_valid)
return hdr->attach_total;
if (hdr->content->parts)
keep_parts = 1;
else
mutt_parse_mime_message (ctx, hdr);
if (AttachAllow || AttachExclude || InlineAllow || InlineExclude)
hdr->attach_total = count_body_parts(hdr->content, M_PARTS_TOPLEVEL);
else
hdr->attach_total = 0;
hdr->attach_valid = 1;
if (!keep_parts)
mutt_free_body (&hdr->content->parts);
return hdr->attach_total;
}
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