/*

* Copyright (C) 1996-2000,2002 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 "mailbox.h"

#include "mx.h"

#include "copy.h"

#include "rfc2047.h"

#include "mime.h"

#include "mutt_crypt.h"

#include "mutt_idna.h"

#include "mutt_curses.h"

#include <string.h>

#include <stdlib.h>

#include <ctype.h>

#include <unistd.h> /* needed for SEEK_SET under SunOS 4.1.4 */

static int address_header_decode (char **str);

static int copy_delete_attach (BODY *b, FILE *fpin, FILE *fpout, char *date);

/* Ok, the only reason for not merging this with mutt_copy_header()

* below is to avoid creating a HEADER structure in message_handler().

* Also, this one will wrap headers much more aggressively than the other one.

*/

int

mutt_copy_hdr (FILE *in, FILE *out, LOFF_T off_start, LOFF_T off_end, int flags,

const char *prefix)

{

int from = 0;

int this_is_from;

int ignore = 0;

char buf[LONG_STRING]; /* should be long enough to get most fields in one pass */

char *nl;

LIST *t;

char **headers;

int hdr_count;

int x;

char *this_one = NULL;

size_t this_one_len = 0;

int error;

if (ftello (in) != off_start)

fseeko (in, off_start, 0);

buf[0] = '\n';

buf[1] = 0;

if ((flags & (CH_REORDER | CH_WEED | CH_MIME | CH_DECODE | CH_PREFIX | CH_WEED_DELIVERED)) == 0)

{

/* Without these flags to complicate things

* we can do a more efficient line to line copying

*/

while (ftello (in) < off_end)

{

nl = strchr (buf, '\n');

if ((fgets (buf, sizeof (buf), in)) == NULL)

break;

/* Is it the begining of a header? */

if (nl && buf[0] != ' ' && buf[0] != '\t')

{

ignore = 1;

if (!from && mutt_strncmp ("From ", buf, 5) == 0)

{

if ((flags & CH_FROM) == 0)

continue;

from = 1;

}

else if (flags & (CH_NOQFROM) &&

ascii_strncasecmp (">From ", buf, 6) == 0)

continue;

else if (buf[0] == '\n' || (buf[0] == '\r' && buf[1] == '\n'))

break; /* end of header */

if ((flags & (CH_UPDATE | CH_XMIT | CH_NOSTATUS)) &&

(ascii_strncasecmp ("Status:", buf, 7) == 0 ||

ascii_strncasecmp ("X-Status:", buf, 9) == 0))

continue;

if ((flags & (CH_UPDATE_LEN | CH_XMIT | CH_NOLEN)) &&

(ascii_strncasecmp ("Content-Length:", buf, 15) == 0 ||

ascii_strncasecmp ("Lines:", buf, 6) == 0))

continue;

if ((flags & CH_UPDATE_REFS) &&

ascii_strncasecmp ("References:", buf, 11) == 0)

continue;

if ((flags & CH_UPDATE_IRT) &&

ascii_strncasecmp ("In-Reply-To:", buf, 12) == 0)

continue;

ignore = 0;

}

if (!ignore && fputs (buf, out) == EOF)

return (-1);

}

return 0;

}

hdr_count = 1;

x = 0;

error = FALSE;

/* We are going to read and collect the headers in an array

* so we are able to do re-ordering.

* First count the number of entries in the array

*/

if (flags & CH_REORDER)

{

for (t = HeaderOrderList; t; t = t->next)

{

dprint(3, (debugfile, "Reorder list: %s\n", t->data));

hdr_count++;

}

}

dprint (1, (debugfile, "WEED is %s\n", (flags & CH_WEED) ? "Set" : "Not"));

headers = safe_calloc (hdr_count, sizeof (char *));

/* Read all the headers into the array */

while (ftello (in) < off_end)

{

nl = strchr (buf, '\n');

/* Read a line */

if ((fgets (buf, sizeof (buf), in)) == NULL)

break;

/* Is it the begining of a header? */

if (nl && buf[0] != ' ' && buf[0] != '\t')

{

/* Do we have anything pending? */

if (this_one)

{

if (flags & CH_DECODE)

{

if (!address_header_decode (&this_one))

rfc2047_decode (&this_one);

this_one_len = mutt_strlen (this_one);

}

if (!headers[x])

headers[x] = this_one;

else

{

int hlen = mutt_strlen (headers[x]);

safe_realloc (&headers[x], hlen + this_one_len + sizeof (char));

strcat (headers[x] + hlen, this_one); /* __STRCAT_CHECKED__ */

FREE (&this_one);

}

this_one = NULL;

}

ignore = 1;

this_is_from = 0;

if (!from && mutt_strncmp ("From ", buf, 5) == 0)

{

if ((flags & CH_FROM) == 0)

continue;

this_is_from = from = 1;

}

else if (buf[0] == '\n' || (buf[0] == '\r' && buf[1] == '\n'))

break; /* end of header */

/* note: CH_FROM takes precedence over header weeding. */

if (!((flags & CH_FROM) && (flags & CH_FORCE_FROM) && this_is_from) &&

(flags & CH_WEED) &&

mutt_matches_ignore (buf, Ignore) &&

!mutt_matches_ignore (buf, UnIgnore))

continue;

if ((flags & CH_WEED_DELIVERED) &&

ascii_strncasecmp ("Delivered-To:", buf, 13) == 0)

continue;

if ((flags & (CH_UPDATE | CH_XMIT | CH_NOSTATUS)) &&

(ascii_strncasecmp ("Status:", buf, 7) == 0 ||

ascii_strncasecmp ("X-Status:", buf, 9) == 0))

continue;

if ((flags & (CH_UPDATE_LEN | CH_XMIT | CH_NOLEN)) &&

(ascii_strncasecmp ("Content-Length:", buf, 15) == 0 ||

ascii_strncasecmp ("Lines:", buf, 6) == 0))

continue;

if ((flags & CH_MIME) &&

((ascii_strncasecmp ("content-", buf, 8) == 0 &&

(ascii_strncasecmp ("transfer-encoding:", buf + 8, 18) == 0 ||

ascii_strncasecmp ("type:", buf + 8, 5) == 0)) ||

ascii_strncasecmp ("mime-version:", buf, 13) == 0))

continue;

if ((flags & CH_UPDATE_REFS) &&

ascii_strncasecmp ("References:", buf, 11) == 0)

continue;

if ((flags & CH_UPDATE_IRT) &&

ascii_strncasecmp ("In-Reply-To:", buf, 12) == 0)

continue;

/* Find x -- the array entry where this header is to be saved */

if (flags & CH_REORDER)

{

for (t = HeaderOrderList, x = 0 ; (t) ; t = t->next, x++)

{

if (!ascii_strncasecmp (buf, t->data, mutt_strlen (t->data)))

{

dprint(2, (debugfile, "Reorder: %s matches %s\n", t->data, buf));

break;

}

}

}

ignore = 0;

} /* If beginning of header */

if (!ignore)

{

dprint (2, (debugfile, "Reorder: x = %d; hdr_count = %d\n", x, hdr_count));

if (!this_one) {

this_one = safe_strdup (buf);

this_one_len = mutt_strlen (this_one);

} else {

int blen = mutt_strlen (buf);

safe_realloc (&this_one, this_one_len + blen + sizeof (char));

strcat (this_one + this_one_len, buf); /* __STRCAT_CHECKED__ */

this_one_len += blen;

}

}

} /* while (ftello (in) < off_end) */

/* Do we have anything pending? -- XXX, same code as in above in the loop. */

if (this_one)

{

if (flags & CH_DECODE)

{

if (!address_header_decode (&this_one))

rfc2047_decode (&this_one);

}

if (!headers[x])

headers[x] = this_one;

else

{

int hlen = mutt_strlen (headers[x]);

safe_realloc (&headers[x], hlen + this_one_len + sizeof (char));

strcat (headers[x] + hlen, this_one); /* __STRCAT_CHECKED__ */

FREE (&this_one);

}

this_one = NULL;

}

/* Now output the headers in order */

for (x = 0; x < hdr_count; x++)

{

if (headers[x])

{

#if 0

if (flags & CH_DECODE)

rfc2047_decode (&headers[x]);

#endif

/* We couldn't do the prefixing when reading because RFC 2047

* decoding may have concatenated lines.

*/

if (flags & (CH_DECODE|CH_PREFIX))

{

if (mutt_write_one_header (out, 0, headers[x],

flags & CH_PREFIX ? prefix : 0, mutt_term_width (Wrap), flags) == -1)

{

error = TRUE;

break;

}

}

else

{

if (fputs (headers[x], out) == EOF)

{

error = TRUE;

break;

}

}

}

}

/* Free in a separate loop to be sure that all headers are freed

* in case of error. */

for (x = 0; x < hdr_count; x++)

FREE (&headers[x]);

FREE (&headers);

if (error)

return (-1);

return (0);

}

/* flags

CH_DECODE RFC2047 header decoding

CH_FROM retain the "From " message separator

CH_FORCE_FROM give CH_FROM precedence over CH_WEED

CH_MIME ignore MIME fields

CH_NOLEN don't write Content-Length: and Lines:

CH_NONEWLINE don't output a newline after the header

CH_NOSTATUS ignore the Status: and X-Status:

CH_PREFIX quote header with $indent_str

CH_REORDER output header in order specified by `hdr_order'

CH_TXTPLAIN generate text/plain MIME headers [hack alert.]

CH_UPDATE write new Status: and X-Status:

CH_UPDATE_LEN write new Content-Length: and Lines:

CH_XMIT ignore Lines: and Content-Length:

CH_WEED do header weeding

CH_NOQFROM ignore ">From " line

CH_UPDATE_IRT update the In-Reply-To: header

CH_UPDATE_REFS update the References: header

prefix

string to use if CH_PREFIX is set

*/

int

mutt_copy_header (FILE *in, HEADER *h, FILE *out, int flags, const char *prefix)

{

char buffer[SHORT_STRING];

if (h->env)

flags |= (h->env->irt_changed ? CH_UPDATE_IRT : 0)

| (h->env->refs_changed ? CH_UPDATE_REFS : 0);

if (mutt_copy_hdr (in, out, h->offset, h->content->offset, flags, prefix) == -1)

return -1;

if (flags & CH_TXTPLAIN)

{

char chsbuf[SHORT_STRING];

fputs ("MIME-Version: 1.0\n", out);

fputs ("Content-Transfer-Encoding: 8bit\n", out);

fputs ("Content-Type: text/plain; charset=", out);

mutt_canonical_charset (chsbuf, sizeof (chsbuf), Charset ? Charset : "us-ascii");

rfc822_cat(buffer, sizeof(buffer), chsbuf, MimeSpecials);

fputs(buffer, out);

fputc('\n', out);

}

if ((flags & CH_UPDATE_IRT) && h->env->in_reply_to)

{

LIST *listp = h->env->in_reply_to;

fputs ("In-Reply-To:", out);

for (; listp; listp = listp->next)

{

fputc (' ', out);

fputs (listp->data, out);

}

fputc ('\n', out);

}

if ((flags & CH_UPDATE_REFS) && h->env->references)

{

fputs ("References:", out);

mutt_write_references (h->env->references, out, 0);

fputc ('\n', out);

}

if ((flags & CH_UPDATE) && (flags & CH_NOSTATUS) == 0)

{

if (h->old || h->read)

{

fputs ("Status: ", out);

if (h->read)

fputs ("RO", out);

else if (h->old)

fputc ('O', out);

fputc ('\n', out);

}

if (h->flagged || h->replied)

{

fputs ("X-Status: ", out);

if (h->replied)

fputc ('A', out);

if (h->flagged)

fputc ('F', out);

fputc ('\n', out);

}

}

if (flags & CH_UPDATE_LEN &&

(flags & CH_NOLEN) == 0)

{

fprintf (out, "Content-Length: " OFF_T_FMT "\n", h->content->length);

if (h->lines != 0 || h->content->length == 0)

fprintf (out, "Lines: %d\n", h->lines);

}

if ((flags & CH_NONEWLINE) == 0)

{

if (flags & CH_PREFIX)

fputs(prefix, out);

fputc ('\n', out); /* add header terminator */

}

if (ferror (out) || feof (out))

return -1;

return 0;

}

/* Count the number of lines and bytes to be deleted in this body*/

static int count_delete_lines (FILE *fp, BODY *b, LOFF_T *length, size_t datelen)

{

int dellines = 0;

long l;

int ch;

if (b->deleted)

{

fseeko (fp, b->offset, SEEK_SET);

for (l = b->length ; l ; l --)

{

ch = getc (fp);

if (ch == EOF)

break;

if (ch == '\n')

dellines ++;

}

dellines -= 3;

*length -= b->length - (84 + datelen);

/* Count the number of digits exceeding the first one to write the size */

for (l = 10 ; b->length >= l ; l *= 10)

(*length) ++;

}

else

{

for (b = b->parts ; b ; b = b->next)

dellines += count_delete_lines (fp, b, length, datelen);

}

return dellines;

}

/* make a copy of a message

*

* fpout where to write output

* fpin where to get input

* hdr header of message being copied

* body structure of message being copied

* flags

* M_CM_NOHEADER don't copy header

* M_CM_PREFIX quote header and body

* M_CM_DECODE decode message body to text/plain

* M_CM_DISPLAY displaying output to the user

* M_CM_PRINTING printing the message

* M_CM_UPDATE update structures in memory after syncing

* M_CM_DECODE_PGP used for decoding PGP messages

* M_CM_CHARCONV perform character set conversion

* chflags flags to mutt_copy_header()

*/

int

_mutt_copy_message (FILE *fpout, FILE *fpin, HEADER *hdr, BODY *body,

int flags, int chflags)

{

char prefix[SHORT_STRING];

STATE s;

LOFF_T new_offset = -1;

int rc = 0;

if (flags & M_CM_PREFIX)

{

if (option (OPTTEXTFLOWED))

strfcpy (prefix, ">", sizeof (prefix));

else

_mutt_make_string (prefix, sizeof (prefix), NONULL (Prefix), Context, hdr, 0);

}

if ((flags & M_CM_NOHEADER) == 0)

{

if (flags & M_CM_PREFIX)

chflags |= CH_PREFIX;

else if (hdr->attach_del && (chflags & CH_UPDATE_LEN))

{

int new_lines;

LOFF_T new_length = body->length;

char date[SHORT_STRING];

mutt_make_date (date, sizeof (date));

date[5] = date[mutt_strlen (date) - 1] = '\"';

/* Count the number of lines and bytes to be deleted */

fseeko (fpin, body->offset, SEEK_SET);

new_lines = hdr->lines -

count_delete_lines (fpin, body, &new_length, mutt_strlen (date));

/* Copy the headers */

if (mutt_copy_header (fpin, hdr, fpout,

chflags | CH_NOLEN | CH_NONEWLINE, NULL))

return -1;

fprintf (fpout, "Content-Length: " OFF_T_FMT "\n", new_length);

if (new_lines <= 0)

new_lines = 0;

else

fprintf (fpout, "Lines: %d\n", new_lines);

putc ('\n', fpout);

if (ferror (fpout) || feof (fpout))

return -1;

new_offset = ftello (fpout);

/* Copy the body */

fseeko (fpin, body->offset, SEEK_SET);

if (copy_delete_attach (body, fpin, fpout, date))

return -1;

#ifdef DEBUG

{

LOFF_T fail = ((ftello (fpout) - new_offset) - new_length);

if (fail)

{

mutt_error ("The length calculation was wrong by %ld bytes", fail);

new_length += fail;

mutt_sleep (1);

}

}

#endif

/* Update original message if we are sync'ing a mailfolder */

if (flags & M_CM_UPDATE)

{

hdr->attach_del = 0;

hdr->lines = new_lines;

body->offset = new_offset;

/* update the total size of the mailbox to reflect this deletion */

Context->size -= body->length - new_length;

/*

* if the message is visible, update the visible size of the mailbox

* as well.

*/

if (Context->v2r[hdr->msgno] != -1)

Context->vsize -= body->length - new_length;

body->length = new_length;

mutt_free_body (&body->parts);

}

return 0;

}

if (mutt_copy_header (fpin, hdr, fpout, chflags,

(chflags & CH_PREFIX) ? prefix : NULL) == -1)

return -1;

new_offset = ftello (fpout);

}

if (flags & M_CM_DECODE)

{

/* now make a text/plain version of the message */

memset (&s, 0, sizeof (STATE));

s.fpin = fpin;

s.fpout = fpout;

if (flags & M_CM_PREFIX)

s.prefix = prefix;

if (flags & M_CM_DISPLAY)

s.flags |= M_DISPLAY;

if (flags & M_CM_PRINTING)

s.flags |= M_PRINTING;

if (flags & M_CM_WEED)

s.flags |= M_WEED;

if (flags & M_CM_CHARCONV)

s.flags |= M_CHARCONV;

if (flags & M_CM_REPLYING)

s.flags |= M_REPLYING;

if (WithCrypto && flags & M_CM_VERIFY)

s.flags |= M_VERIFY;

rc = mutt_body_handler (body, &s);

}

else if (WithCrypto

&& (flags & M_CM_DECODE_CRYPT) && (hdr->security & ENCRYPT))

{

BODY *cur = NULL;

FILE *fp;

if ((WithCrypto & APPLICATION_PGP)

&& (flags & M_CM_DECODE_PGP) && (hdr->security & APPLICATION_PGP) &&

hdr->content->type == TYPEMULTIPART)

{

if (crypt_pgp_decrypt_mime (fpin, &fp, hdr->content, &cur))

return (-1);

fputs ("MIME-Version: 1.0\n", fpout);

}

if ((WithCrypto & APPLICATION_SMIME)

&& (flags & M_CM_DECODE_SMIME) && (hdr->security & APPLICATION_SMIME)

&& hdr->content->type == TYPEAPPLICATION)

{

if (crypt_smime_decrypt_mime (fpin, &fp, hdr->content, &cur))

return (-1);

}

if (!cur)

{

mutt_error (_("No decryption engine available for message"));

return -1;

}

mutt_write_mime_header (cur, fpout);

fputc ('\n', fpout);

fseeko (fp, cur->offset, 0);

if (mutt_copy_bytes (fp, fpout, cur->length) == -1)

{

safe_fclose (&fp);

mutt_free_body (&cur);

return (-1);

}

mutt_free_body (&cur);

safe_fclose (&fp);

}

else

{

fseeko (fpin, body->offset, 0);

if (flags & M_CM_PREFIX)

{

int c;

size_t bytes = body->length;

fputs(prefix, fpout);

while((c = fgetc(fpin)) != EOF && bytes--)

{

fputc(c, fpout);

if(c == '\n')

{

fputs(prefix, fpout);

}

}

}

else if (mutt_copy_bytes (fpin, fpout, body->length) == -1)

return -1;

}

if ((flags & M_CM_UPDATE) && (flags & M_CM_NOHEADER) == 0

&& new_offset != -1)

{

body->offset = new_offset;

mutt_free_body (&body->parts);

}

return rc;

}

/* should be made to return -1 on fatal errors, and 1 on non-fatal errors

* like partial decode, where it is worth displaying as much as possible */

int

mutt_copy_message (FILE *fpout, CONTEXT *src, HEADER *hdr, int flags,

int chflags)

{

MESSAGE *msg;

int r;

if ((msg = mx_open_message (src, hdr->msgno)) == NULL)

return -1;

if ((r = _mutt_copy_message (fpout, msg->fp, hdr, hdr->content, flags, chflags)) == 0

&& (ferror (fpout) || feof (fpout)))

{

dprint (1, (debugfile, "_mutt_copy_message failed to detect EOF!\n"));

r = -1;

}

mx_close_message (&msg);

return r;

}

/* appends a copy of the given message to a mailbox

*

* dest destination mailbox

* fpin where to get input

* src source mailbox

* hdr message being copied

* body structure of message being copied

* flags mutt_copy_message() flags

* chflags mutt_copy_header() flags

*/

int

_mutt_append_message (CONTEXT *dest, FILE *fpin, CONTEXT *src, HEADER *hdr,

BODY *body, int flags, int chflags)

{

char buf[STRING];

MESSAGE *msg;

int r;

fseeko (fpin, hdr->offset, 0);

if (fgets (buf, sizeof (buf), fpin) == NULL)

return -1;

if ((msg = mx_open_new_message (dest, hdr, is_from (buf, NULL, 0, NULL) ? 0 : M_ADD_FROM)) == NULL)

return -1;

if (dest->magic == M_MBOX || dest->magic == M_MMDF)

chflags |= CH_FROM | CH_FORCE_FROM;

chflags |= (dest->magic == M_MAILDIR ? CH_NOSTATUS : CH_UPDATE);

r = _mutt_copy_message (msg->fp, fpin, hdr, body, flags, chflags);

if (mx_commit_message (msg, dest) != 0)

r = -1;

mx_close_message (&msg);

return r;

}

int

mutt_append_message (CONTEXT *dest, CONTEXT *src, HEADER *hdr, int cmflags,

int chflags)

{

MESSAGE *msg;

int r;

if ((msg = mx_open_message (src, hdr->msgno)) == NULL)

return -1;

r = _mutt_append_message (dest, msg->fp, src, hdr, hdr->content, cmflags, chflags);

mx_close_message (&msg);

return r;

}

/*

* This function copies a message body, while deleting _in_the_copy_

* any attachments which are marked for deletion.

* Nothing is changed in the original message -- this is left to the caller.

*

* The function will return 0 on success and -1 on failure.

*/

static int copy_delete_attach (BODY *b, FILE *fpin, FILE *fpout, char *date)

{

BODY *part;

for (part = b->parts ; part ; part = part->next)

{

if (part->deleted || part->parts)

{

/* Copy till start of this part */

if (mutt_copy_bytes (fpin, fpout, part->hdr_offset - ftello (fpin)))

return -1;

if (part->deleted)

{

fprintf (fpout,

"Content-Type: message/external-body; access-type=x-mutt-deleted;\n"

"\texpiration=%s; length=" OFF_T_FMT "\n"

"\n", date + 5, part->length);

if (ferror (fpout))

return -1;

/* Copy the original mime headers */

if (mutt_copy_bytes (fpin, fpout, part->offset - ftello (fpin)))

return -1;

/* Skip the deleted body */

fseeko (fpin, part->offset + part->length, SEEK_SET);

}

else

{

if (copy_delete_attach (part, fpin, fpout, date))

return -1;

}

}

}

/* Copy the last parts */

if (mutt_copy_bytes (fpin, fpout, b->offset + b->length - ftello (fpin)))

return -1;

return 0;

}

/*

* This function is the equivalent of mutt_write_address_list(),

* but writes to a buffer instead of writing to a stream.

* mutt_write_address_list could be re-used if we wouldn't store

* all the decoded headers in a huge array, first.

*

* XXX - fix that.

*/

static void format_address_header (char **h, ADDRESS *a)

{

char buf[HUGE_STRING];

char cbuf[STRING];

char c2buf[STRING];

char *p = NULL;

int l, linelen, buflen, count, cbuflen, c2buflen, plen;

linelen = mutt_strlen (*h);

plen = linelen;

buflen = linelen + 3;

safe_realloc (h, buflen);

for (count = 0; a; a = a->next, count++)

{

ADDRESS *tmp = a->next;

a->next = NULL;

*buf = *cbuf = *c2buf = '\0';

l = rfc822_write_address (buf, sizeof (buf), a, 0);

a->next = tmp;

if (count && linelen + l > 74)

{

strcpy (cbuf, "\n\t"); /* __STRCPY_CHECKED__ */

linelen = l + 8;

}

else

{

if (a->mailbox)

{

strcpy (cbuf, " "); /* __STRCPY_CHECKED__ */

linelen++;

}

linelen += l;

}

if (!a->group && a->next && a->next->mailbox)

{

linelen++;

buflen++;

strcpy (c2buf, ","); /* __STRCPY_CHECKED__ */

}

cbuflen = mutt_strlen (cbuf);

c2buflen = mutt_strlen (c2buf);

buflen += l + cbuflen + c2buflen;

safe_realloc (h, buflen);

p = *h;

strcat (p + plen, cbuf); /* __STRCAT_CHECKED__ */

plen += cbuflen;

strcat (p + plen, buf); /* __STRCAT_CHECKED__ */

plen += l;

strcat (p + plen, c2buf); /* __STRCAT_CHECKED__ */

plen += c2buflen;

}

/* Space for this was allocated in the beginning of this function. */

strcat (p + plen, "\n"); /* __STRCAT_CHECKED__ */

}

static int address_header_decode (char **h)

{

char *s = *h;

int l, rp = 0;

ADDRESS *a = NULL;

ADDRESS *cur = NULL;

switch (tolower ((unsigned char) *s))

{

case 'r':

{

if (ascii_strncasecmp (s, "return-path:", 12) == 0)

{

l = 12;

rp = 1;

break;

}

else if (ascii_strncasecmp (s, "reply-to:", 9) == 0)

{

l = 9;

break;

}

return 0;

}

case 'f':

{

if (ascii_strncasecmp (s, "from:", 5))

return 0;

l = 5;

break;

}

case 'c':

{

if (ascii_strncasecmp (s, "cc:", 3))

return 0;

l = 3;

break;

}

case 'b':

{

if (ascii_strncasecmp (s, "bcc:", 4))

return 0;

l = 4;

break;

}

case 's':

{

if (ascii_strncasecmp (s, "sender:", 7))

return 0;

l = 7;

break;

}

case 't':

{

if (ascii_strncasecmp (s, "to:", 3))

return 0;

l = 3;

break;

}

case 'm':

{

if (ascii_strncasecmp (s, "mail-followup-to:", 17))

return 0;

l = 17;

break;

}

default: return 0;

}

if ((a = rfc822_parse_adrlist (a, s + l)) == NULL)

return 0;

mutt_addrlist_to_local (a);

rfc2047_decode_adrlist (a);

for (cur = a; cur; cur = cur->next)

if (cur->personal)

rfc822_dequote_comment (cur->personal);

/* angle brackets for return path are mandated by RfC5322,

* so leave Return-Path as-is */

if (rp)

*h = safe_strdup (s);

else

{

*h = safe_calloc (1, l + 2);

strfcpy (*h, s, l + 1);

format_address_header (h, a);

}

rfc822_free_address (&a);

FREE (&s);

return 1;

}