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mailbox/mime.c 23.4 KB
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/* GNU Mailutils -- a suite of utilities for electronic mail
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   Copyright (C) 1999, 2000, 2001, 2003, 2004 Free Software Foundation, Inc.
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   This library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public
   License as published by the Free Software Foundation; either
   version 2 of the License, or (at your option) any later version.
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   This library is distributed in the hope that it will be useful,
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   but WITHOUT ANY WARRANTY; without even the implied warranty of
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   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Lesser General Public License for more details.
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   You should have received a copy of the GNU Lesser General Public
   License along with this library; if not, write to the Free Software
   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307  USA  */
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#ifdef HAVE_CONFIG_H
# include <config.h>
#endif

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#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
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#include <time.h>
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#include <unistd.h>
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#ifdef HAVE_STRINGS_H
# include <strings.h>
#endif
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#include <mailutils/message.h>
#include <mailutils/stream.h>
#include <mailutils/body.h>
#include <mailutils/header.h>
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#include <mailutils/errno.h>
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#include <mime0.h>

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#ifndef TRUE
#define TRUE (1)
#define FALSE (0)
#endif

/* TODO:
 *  Need to prevent re-entry into mime lib, but allow non-blocking re-entry into lib.
 */

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static int
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_mime_is_multipart_digest (mime_t mime)
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{
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  if (mime->content_type)
    return (strncasecmp
	    ("multipart/digest", mime->content_type,
	     strlen ("multipart/digest")) ? 0 : 1);
  return 0;
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}

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static int
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_mime_append_part (mime_t mime, message_t msg, int offset, int len, int lines)
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{
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  struct _mime_part *mime_part, **part_arr;
  int ret;
  size_t size;
  header_t hdr;

  if ((mime_part = calloc (1, sizeof (*mime_part))) == NULL)
    return ENOMEM;

  if (mime->nmtp_parts >= mime->tparts)
    {
      if ((part_arr =
	   realloc (mime->mtp_parts,
		    (mime->tparts + 5) * sizeof (mime_part))) == NULL)
	{
	  free (mime_part);
	  return ENOMEM;
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	}
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      mime->mtp_parts = part_arr;
      mime->tparts += 5;
    }
  mime->mtp_parts[mime->nmtp_parts++] = mime_part;
  if (msg == NULL)
    {
      if ((ret = message_create (&(mime_part->msg), mime_part)) == 0)
	{
	  if ((ret =
	       header_create (&hdr, mime->header_buf,
			      mime->header_length, mime_part->msg)) != 0)
	    {
	      message_destroy (&mime_part->msg, mime_part);
	      free (mime_part);
	      return ret;
	    }
	  message_set_header (mime_part->msg, hdr, mime_part);
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	}
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      else
	{
	  free (mime_part);
	  return ret;
	}
      mime->header_length = 0;
      if ((ret =
	   header_get_value (hdr, MU_HEADER_CONTENT_TYPE, NULL,
			     0, &size)) != 0 || size == 0)
	{
	  if (_mime_is_multipart_digest (mime))
	    header_set_value (hdr,
			      MU_HEADER_CONTENT_TYPE, "message/rfc822", 0);
	  else
	    header_set_value (hdr, MU_HEADER_CONTENT_TYPE, "text/plain", 0);
	}
      mime_part->len = len;
      mime_part->lines = lines;
      mime_part->offset = offset;
    }
  else
    {
      message_ref (msg);
      message_size (msg, &mime_part->len);
      message_lines (msg, &mime_part->lines);
      if (mime->nmtp_parts > 1)
	mime_part->offset = mime->mtp_parts[mime->nmtp_parts - 2]->len;
      mime_part->msg = msg;
    }
  mime_part->mime = mime;
  return 0;
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}

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static char *
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_strltrim (char *str)
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{
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  char *p;
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  for (p = str; isspace ((unsigned char) *p) && *p != '\0'; ++p);
  return ((p != str) ? memmove (str, p, strlen (p) + 1) : str);
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}

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static char *
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_strttrim (char *str)
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{
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  char *p;
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  for (p = str + strlen (str) - 1;
       isspace ((unsigned char) *p) && p >= str; --p);
  *++p = '\0';
  return (str);
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}

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char *_strtrim (char *str);
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#define _strtrim(str) _strltrim(_strttrim(str))

#define _ISSPECIAL(c) ( \
    ((c) == '(') || ((c) == ')') || ((c) == '<') || ((c) == '>') \
    || ((c) == '@') || ((c) == ',') || ((c) == ';') || ((c) == ':') \
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    || ((c) == '\\') || ((c) == '.') || ((c) == '[') \
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    || ((c) == ']') )
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static void
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_mime_munge_content_header (char *field_body)
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{
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  char *p, *e, *str = field_body;
  int quoted = 0;

  _strtrim (field_body);

  if ((e = strchr (str, ';')) == NULL)
    return;
  while (*e == ';')
    {
      p = e;
      e++;
      while (*e && isspace ((unsigned char) *e))	/* remove space upto param */
	e++;
      memmove (p + 1, e, strlen (e) + 1);
      e = p + 1;

      while (*e && *e != '=')	/* find end of value */
	e++;
      e = p = e + 1;
      while (*e
	     && (quoted
		 || (!_ISSPECIAL (*e) && !isspace ((unsigned char) *e))))
	{
	  if (*e == '\\')
	    {			/* escaped */
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	      memmove (e, e + 1, strlen (e));
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	    }
	  else if (*e == '\"')
	    quoted = ~quoted;
	  e++;
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	}
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    }
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}

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static char *
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_mime_get_param (char *field_body, const char *param, int *len)
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{
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  char *str, *p, *v, *e;
  int quoted = 0, was_quoted = 0;

  if (len == NULL || (str = field_body) == NULL)
    return NULL;

  p = strchr (str, ';');
  while (p)
    {
      p++;
      if ((v = strchr (p, '=')) == NULL)
	break;
      *len = 0;
      v = e = v + 1;
      while (*e
	     && (quoted
		 || (!_ISSPECIAL (*e) && !isspace ((unsigned char) *e))))
	{			/* skip pass value and calc len */
	  if (*e == '\"')
	    quoted = ~quoted, was_quoted = 1;
	  else
	    (*len)++;
	  e++;
	}
      if (strncasecmp (p, param, strlen (param)))
	{			/* no match jump to next */
	  p = strchr (e, ';');
	  continue;
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	}
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      else
	return was_quoted ? v + 1 : v;	/* return unquoted value */
    }
  return NULL;
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}

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static int
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_mime_setup_buffers (mime_t mime)
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{
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  if (mime->cur_buf == NULL
      && (mime->cur_buf = malloc (mime->buf_size)) == NULL)
    {
      return ENOMEM;
    }
  if (mime->cur_line == NULL
      && (mime->cur_line = calloc (MIME_MAX_HDR_LEN, 1)) == NULL)
    {
      free (mime->cur_buf);
      return ENOMEM;
    }
  return 0;
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}

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static void
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_mime_append_header_line (mime_t mime)
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{
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  if (mime->header_length + mime->line_ndx > mime->header_buf_size)
    {
      char *nhb;
      if ((nhb =
	   realloc (mime->header_buf,
		    mime->header_length + mime->line_ndx + 128)) == NULL)
	return;
      mime->header_buf = nhb;
      mime->header_buf_size = mime->header_length + mime->line_ndx + 128;
    }
  memcpy (mime->header_buf + mime->header_length, mime->cur_line,
	  mime->line_ndx);
  mime->header_length += mime->line_ndx;
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}

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static int
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_mime_parse_mpart_message (mime_t mime)
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{
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  char *cp, *cp2;
  int blength, mb_length, mb_offset, mb_lines, ret;
  size_t nbytes;

  if (!(mime->flags & MIME_PARSER_ACTIVE))
    {
      char *boundary;
      int len;

      if ((ret = _mime_setup_buffers (mime)) != 0)
	return ret;
      if ((boundary =
	   _mime_get_param (mime->content_type, "boundary", &len)) == NULL)
	return EINVAL;
      if ((mime->boundary = calloc (1, len + 1)) == NULL)
	return ENOMEM;
      strncpy (mime->boundary, boundary, len);

      mime->cur_offset = 0;
      mime->line_ndx = 0;
      mime->parser_state = MIME_STATE_SCAN_BOUNDARY;
      mime->flags |= MIME_PARSER_ACTIVE;
    }
  mb_length = mime->body_length;
  mb_offset = mime->body_offset;
  mb_lines = mime->body_lines;
  blength = strlen (mime->boundary);

  while ((ret =
	  stream_read (mime->stream, mime->cur_buf, mime->buf_size,
		       mime->cur_offset, &nbytes)) == 0 && nbytes)
    {
      cp = mime->cur_buf;
      while (nbytes)
	{
	  mime->cur_line[mime->line_ndx] = *cp;
	  if (*cp == '\n')
	    {
	      switch (mime->parser_state)
		{
		case MIME_STATE_BEGIN_LINE:
		  mime->cur_line[0] = *cp;
		  mime->line_ndx = 0;
		  mime->parser_state = MIME_STATE_SCAN_BOUNDARY;
		  break;
		  
		case MIME_STATE_SCAN_BOUNDARY:
		  cp2 =
		    mime->cur_line[0] ==
		    '\n' ? mime->cur_line + 1 : mime->cur_line;
		  if (mime->header_length)
		    mb_lines++;
		  if (mime->line_ndx >= blength)
		    {
		      if ((!strncasecmp (cp2, "--", 2)
			   && !strncasecmp (cp2 + 2, mime->boundary,
			    blength))
			  || !strncasecmp (cp2, mime->boundary, blength))
			{
			  mime->parser_state = MIME_STATE_HEADERS;
			  mime->flags &= ~MIME_PARSER_HAVE_CR;
			  mb_length = mime->cur_offset -
			              mb_offset - mime->line_ndx;
			  if (mb_lines > 1)
			    mb_length++;
			  if (mime->header_length) /* this skips the preamble */
			    _mime_append_part (mime, NULL,
					       mb_offset, mb_length, mb_lines-1);
			  if ((&mime->cur_line[mime->line_ndx] - cp2 - 1 >
			       blength
			       && !strncasecmp (cp2 + blength + 2, "--", 2))
			      || (&mime->cur_line[mime->line_ndx] - cp2 - 1 ==
				  blength
				  && !strncasecmp (cp2 + blength, "--", 2)))
			    {	/* last boundary */
			      mime->parser_state = MIME_STATE_BEGIN_LINE;
			      mime->header_length = 0;
			      break;
			    }
			  mime->line_ndx = -1;	/* headers parsing requires empty line */
			  break;
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			}
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		    }
		  mime->line_ndx = 0;
		  mime->cur_line[0] = *cp; /* stay in this state but
					      leave '\n' at begining */
		  break;
		  
		case MIME_STATE_HEADERS:
		  mime->line_ndx++;
		  _mime_append_header_line (mime);
		  if (mime->line_ndx == 1 || mime->cur_line[0] == '\r')
		    {
		      mime->parser_state = MIME_STATE_SCAN_BOUNDARY;
		      mb_offset = mime->cur_offset + 1;
		      mb_lines = 0;
		    }
		  mime->line_ndx = -1;
		  break;
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		}
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	    }
	  mime->line_ndx++;
	  if (mime->line_ndx >= MIME_MAX_HDR_LEN)
	    {
	      mime->line_ndx = 0;
	      mime->parser_state = MIME_STATE_BEGIN_LINE;
	    }
	  mime->cur_offset++;
	  nbytes--;
	  cp++;
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	}
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    }
  mime->body_lines = mb_lines;
  mime->body_length = mb_length;
  mime->body_offset = mb_offset;
  if (ret != EAGAIN)
    {				/* finished cleanup */
      if (mime->header_length)	/* this skips the preamble */
	_mime_append_part (mime, NULL, mb_offset, mb_length, mb_lines);
      mime->flags &= ~MIME_PARSER_ACTIVE;
      mime->body_offset = mime->body_length =
	mime->header_length = mime->body_lines = 0;
    }
  return ret;
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}

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/*------ Mime message functions for READING a multipart message -----*/

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static int
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_mimepart_body_read (stream_t stream, char *buf, size_t buflen, off_t off,
		     size_t * nbytes)
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{
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  body_t body = stream_get_owner (stream);
  message_t msg = body_get_owner (body);
  struct _mime_part *mime_part = message_get_owner (msg);
  size_t read_len;
  int ret = 0;

  if (nbytes == NULL)
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    return MU_ERR_OUT_NULL;
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  *nbytes = 0;
  read_len = (int) mime_part->len - (int) off;
  if (read_len <= 0)
    {
      if (!stream_is_seekable (mime_part->mime->stream))
	{
	  while ((ret =
		  stream_read (mime_part->mime->stream,
			       buf, buflen,
			       mime_part->offset + off,
			       nbytes)) == 0 && *nbytes)
	    off += *nbytes;
	  *nbytes = 0;
Alain Magloire authored
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	}
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      return ret;
    }
  read_len = (buflen <= read_len) ? buflen : read_len;
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  return stream_read (mime_part->mime->stream, buf, read_len,
		      mime_part->offset + off, nbytes);
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}

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static int
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_mimepart_body_transport (stream_t stream, mu_transport_t *tr1, mu_transport_t *tr2)
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{
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  body_t body = stream_get_owner (stream);
  message_t msg = body_get_owner (body);
  struct _mime_part *mime_part = message_get_owner (msg);
  return stream_get_transport2 (mime_part->mime->stream, tr1, tr2);
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}

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static int
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_mimepart_body_size (body_t body, size_t * psize)
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{
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  message_t msg = body_get_owner (body);
  struct _mime_part *mime_part = message_get_owner (msg);

  if (mime_part == NULL)
    return EINVAL;
  if (psize)
    *psize = mime_part->len;
  return 0;
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}

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static int
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_mimepart_body_lines (body_t body, size_t * plines)
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{
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  message_t msg = body_get_owner (body);
  struct _mime_part *mime_part = message_get_owner (msg);

  if (mime_part == NULL)
    return EINVAL;
  if (plines)
    *plines = mime_part->lines;
  return 0;
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}

/*------ Mime message/header functions for CREATING multipart message -----*/
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static int
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_mime_set_content_type (mime_t mime)
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{
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  char content_type[256], *content_te;
  char boundary[128];
  header_t hdr = NULL;
  size_t size;
  int ret;

  /* Delayed the creation of the header 'til they create the final message via
     mime_get_message()  */
  if (mime->hdrs == NULL)
    return 0;
  if (mime->nmtp_parts > 1)
    {
      if (mime->flags & MIME_ADDED_MULTIPART_CT)
	return 0;
      if (mime->flags & MIME_MULTIPART_MIXED)
	strcpy (content_type, "multipart/mixed; boundary=");
      else
	strcpy (content_type, "multipart/alternative; boundary=");
      if (mime->boundary == NULL)
	{
	  sprintf (boundary, "%ld-%ld=:%ld",
		   (long) random (), (long) time (0), (long) getpid ());
	  if ((mime->boundary = strdup (boundary)) == NULL)
	    return ENOMEM;
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	}
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      strcat (content_type, "\"");
      strcat (content_type, mime->boundary);
      strcat (content_type, "\"");
      mime->flags |= MIME_ADDED_MULTIPART_CT;

      ret =
	header_set_value (mime->hdrs, MU_HEADER_CONTENT_TYPE,
			  content_type, 1);
    }
  else
    {
      if ((mime->
	   flags & (MIME_ADDED_CT | MIME_ADDED_MULTIPART_CT))
	  == MIME_ADDED_CT)
	return 0;
      mime->flags &= ~MIME_ADDED_MULTIPART_CT;
      if (mime->nmtp_parts)
	message_get_header (mime->mtp_parts[0]->msg, &hdr);
      if (hdr == NULL
	  || header_get_value (hdr, MU_HEADER_CONTENT_TYPE,
			       NULL, 0, &size) != 0 || size == 0)
	strcpy (content_type, "text/plain; charset=us-ascii");
      else
	header_get_value (hdr, MU_HEADER_CONTENT_TYPE,
			  content_type, sizeof (content_type), &size);

      ret =
	header_set_value (mime->hdrs, MU_HEADER_CONTENT_TYPE,
			  content_type, 1);
      if (ret)
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	return ret;
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      /* if the only part contains a transfer-encoding
         field, set it on the message header too */
      if (hdr &&
	  header_aget_value (hdr,
			     MU_HEADER_CONTENT_TRANSFER_ENCODING,
			     &content_te) == 0)
	{
	  ret = header_set_value (mime->hdrs,
				  MU_HEADER_CONTENT_TRANSFER_ENCODING,
				  content_te, 1);
	  free (content_te);
	}
    }
  mime->flags |= MIME_ADDED_CT;
  return ret;
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}

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#define ADD_CHAR(buf, c, offset, buflen, nbytes) {*(buf)++ = c; (offset)++; (nbytes)++;if (--(buflen) == 0) return 0;}

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static int
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_mime_body_read (stream_t stream, char *buf, size_t buflen, off_t off,
		 size_t * nbytes)
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{
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  body_t body = stream_get_owner (stream);
  message_t msg = body_get_owner (body);
  mime_t mime = message_get_owner (msg);
  int ret = 0;
  size_t part_nbytes = 0;
  stream_t msg_stream = NULL;

  if (mime->nmtp_parts == 0)
    return EINVAL;

  if (off == 0)
    {				/* reset message */
      mime->cur_offset = 0;
      mime->cur_part = 0;
      mime->part_offset = 0;

      if (mime->nmtp_parts > 1)
	mime->flags |= MIME_INSERT_BOUNDARY;
    }

  if (off != mime->cur_offset)
    return ESPIPE;

  if (nbytes)
    *nbytes = 0;

  if ((ret = _mime_set_content_type (mime)) == 0)
    {
      do
	{
	  if (mime->nmtp_parts > 1)
	    {
	      int len;
	      if (mime->flags & MIME_INSERT_BOUNDARY)
		{
		  if ((mime->flags & MIME_ADDING_BOUNDARY) == 0)
		    {
		      mime->boundary_len = strlen (mime->boundary);
		      mime->preamble = 2;
		      if (mime->cur_part == mime->nmtp_parts)
			mime->postamble = 2;
		      mime->flags |= MIME_ADDING_BOUNDARY;
		    }
		  while (mime->preamble)
		    {
		      mime->preamble--;
		      ADD_CHAR (buf, '-', mime->cur_offset, buflen, *nbytes);
		    }
		  len = strlen (mime->boundary) - mime->boundary_len;
		  while (mime->boundary_len)
		    {
		      mime->boundary_len--;
		      ADD_CHAR (buf,
				mime->
				boundary
				[len++], mime->cur_offset, buflen, *nbytes);
		    }
		  while (mime->postamble)
		    {
		      mime->postamble--;
		      ADD_CHAR (buf, '-', mime->cur_offset, buflen, *nbytes);
		    }
		  mime->flags &=
		    ~(MIME_INSERT_BOUNDARY | MIME_ADDING_BOUNDARY);
		  mime->part_offset = 0;
		  ADD_CHAR (buf, '\n', mime->cur_offset, buflen, *nbytes);
		}
	      if (mime->cur_part >= mime->nmtp_parts)
		return 0;
	      message_get_stream (mime->mtp_parts[mime->cur_part]->msg,
				  &msg_stream);
	    }
	  else
	    {
	      body_t part_body;

	      if (mime->cur_part >= mime->nmtp_parts)
		return 0;
	      message_get_body (mime->mtp_parts[mime->cur_part]->msg,
				&part_body);
	      body_get_stream (part_body, &msg_stream);
	    }
	  ret =
	    stream_read (msg_stream, buf, buflen,
			 mime->part_offset, &part_nbytes);
	  if (part_nbytes)
	    {
	      mime->part_offset += part_nbytes;
	      mime->cur_offset += part_nbytes;
	      if (nbytes)
		*nbytes += part_nbytes;
	    }
	  if (ret == 0 && part_nbytes == 0)
	    {
	      mime->flags |= MIME_INSERT_BOUNDARY;
	      mime->cur_part++;
	      ADD_CHAR (buf, '\n', mime->cur_offset, buflen, *nbytes);
	    }
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	}
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      while (ret == 0 && part_nbytes == 0
	     && mime->cur_part <= mime->nmtp_parts);
    }
  return ret;
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}

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static int
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_mime_body_transport (stream_t stream, mu_transport_t *tr1, mu_transport_t *tr2)
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{
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  body_t body = stream_get_owner (stream);
  message_t msg = body_get_owner (body);
  mime_t mime = message_get_owner (msg);
  stream_t msg_stream = NULL;
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  if (mime->nmtp_parts == 0 || mime->cur_offset == 0)
    return EINVAL;
  message_get_stream (mime->mtp_parts[mime->cur_part]->msg, &msg_stream);
  return stream_get_transport2 (msg_stream, tr1, tr2);
671 672
}

673
static int
674
_mime_body_size (body_t body, size_t * psize)
675
{
676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696
  message_t msg = body_get_owner (body);
  mime_t mime = message_get_owner (msg);
  int i, ret;
  size_t size;

  if (mime->nmtp_parts == 0)
    return EINVAL;

  if ((ret = _mime_set_content_type (mime)) != 0)
    return ret;
  for (i = 0; i < mime->nmtp_parts; i++)
    {
      message_size (mime->mtp_parts[i]->msg, &size);
      *psize += size;
      if (mime->nmtp_parts > 1)	/* boundary line */
	*psize += strlen (mime->boundary) + 3;
    }
  if (mime->nmtp_parts > 1)	/* ending boundary line */
    *psize += 2;

  return 0;
697 698
}

699
static int
700
_mime_body_lines (body_t body, size_t * plines)
701
{
702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719
  message_t msg = body_get_owner (body);
  mime_t mime = message_get_owner (msg);
  int i, ret;
  size_t lines;

  if (mime->nmtp_parts == 0)
    return EINVAL;

  if ((ret = _mime_set_content_type (mime)) != 0)
    return ret;
  for (i = 0; i < mime->nmtp_parts; i++)
    {
      message_lines (mime->mtp_parts[i]->msg, &lines);
      plines += lines;
      if (mime->nmtp_parts > 1)	/* boundary line */
	plines++;
    }
  return 0;
720 721
}

722
int
723
mime_create (mime_t * pmime, message_t msg, int flags)
724
{
725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754
  mime_t mime = NULL;
  int ret = 0;
  size_t size;
  body_t body;

  if (pmime == NULL)
    return EINVAL;
  *pmime = NULL;
  if ((mime = calloc (1, sizeof (*mime))) == NULL)
    return ENOMEM;
  if (msg)
    {
      if ((ret = message_get_header (msg, &mime->hdrs)) == 0)
	{
	  if ((ret =
	       header_get_value (mime->hdrs,
				 MU_HEADER_CONTENT_TYPE,
				 NULL, 0, &size)) == 0 && size)
	    {
	      if ((mime->content_type = malloc (size + 1)) == NULL)
		ret = ENOMEM;
	      else if ((ret =
			header_get_value (mime->hdrs,
					  MU_HEADER_CONTENT_TYPE,
					  mime->content_type,
					  size + 1, 0)) == 0)
		_mime_munge_content_header (mime->content_type);
	    }
	  else
	    {
755
	      if (ret == MU_ERR_NOENT)
756 757 758 759 760 761
		{
		  ret = 0;
		  if ((mime->content_type =
		       strdup ("text/plain; charset=us-ascii")) == NULL)
		    /* default as per spec. */
		    ret = ENOMEM;
762
		}
763 764 765 766 767 768 769 770
	    }
	  if (ret == 0)
	    {
	      mime->msg = msg;
	      mime->buf_size = MIME_DFLT_BUF_SIZE;
	      message_get_body (msg, &body);
	      body_get_stream (body, &(mime->stream));
	    }
771
	}
772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788
    }
  else
    {
      mime->flags |= MIME_NEW_MESSAGE | MIME_MULTIPART_MIXED;
    }
  if (ret != 0)
    {
      if (mime->content_type)
	free (mime->content_type);
      free (mime);
    }
  else
    {
      mime->flags |= (flags & MIME_FLAG_MASK);
      *pmime = mime;
    }
  return ret;
789 790
}

791
void
792
mime_destroy (mime_t * pmime)
793
{
794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812
  mime_t mime;
  struct _mime_part *mime_part;
  int i;

  if (pmime && *pmime)
    {
      mime = *pmime;
      if (mime->mtp_parts != NULL)
	{
	  for (i = 0; i < mime->nmtp_parts; i++)
	    {
	      mime_part = mime->mtp_parts[i];
	      if (mime_part->msg && mime->flags & MIME_NEW_MESSAGE)
		message_unref (mime_part->msg);
	      else
		message_destroy (&mime_part->msg, mime_part);
	      free (mime_part);
	    }
	  free (mime->mtp_parts);
813
	}
814 815 816 817 818 819 820 821 822 823 824 825 826 827 828
      if (mime->msg && mime->flags & MIME_NEW_MESSAGE)
	message_destroy (&mime->msg, mime);
      if (mime->content_type)
	free (mime->content_type);
      if (mime->cur_buf)
	free (mime->cur_buf);
      if (mime->cur_line)
	free (mime->cur_line);
      if (mime->boundary)
	free (mime->boundary);
      if (mime->header_buf)
	free (mime->header_buf);
      free (mime);
      *pmime = NULL;
    }
829 830
}

831
int
832
mime_get_part (mime_t mime, size_t part, message_t * msg)
833
{
834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862
  size_t nmtp_parts;
  int ret = 0, flags = 0;
  stream_t stream;
  body_t body;
  struct _mime_part *mime_part;

  if ((ret = mime_get_num_parts (mime, &nmtp_parts)) == 0)
    {
      if (part < 1 || part > nmtp_parts)
	return EINVAL;
      if (nmtp_parts == 1 && mime->mtp_parts == NULL)
	*msg = mime->msg;
      else
	{
	  mime_part = mime->mtp_parts[part - 1];
	  if (!mime_part->body_created
	      && (ret = body_create (&body, mime_part->msg)) == 0)
	    {
	      body_set_size (body, _mimepart_body_size, mime_part->msg);
	      body_set_lines (body, _mimepart_body_lines, mime_part->msg);
	      stream_get_flags (mime->stream, &flags);
	      if ((ret =
		   stream_create (&stream,
				  MU_STREAM_READ | (flags &
						    (MU_STREAM_SEEKABLE
						     | MU_STREAM_NONBLOCK)),
				  body)) == 0)
		{
		  stream_set_read (stream, _mimepart_body_read, body);
863
		  stream_set_get_transport2 (stream, _mimepart_body_transport, body);
864 865 866
		  body_set_stream (body, stream, mime_part->msg);
		  message_set_body (mime_part->msg, body, mime_part);
		  mime_part->body_created = 1;
867
		}
868 869
	    }
	  *msg = mime_part->msg;
870
	}
871 872
    }
  return ret;
873 874
}

875
int
876
mime_get_num_parts (mime_t mime, size_t * nmtp_parts)
877
{
878 879 880 881 882 883 884 885
  int ret = 0;

  if (mime->nmtp_parts == 0 || mime->flags & MIME_PARSER_ACTIVE)
    {
      if (mime_is_multipart (mime))
	{
	  if ((ret = _mime_parse_mpart_message (mime)) != 0)
	    return (ret);
886
	}
887 888 889 890 891
      else
	mime->nmtp_parts = 1;
    }
  *nmtp_parts = mime->nmtp_parts;
  return (ret);
892

893 894
}

895
int
896
mime_add_part (mime_t mime, message_t msg)
897
{
898
  int ret;
899

900 901 902 903 904
  if (mime == NULL || msg == NULL || (mime->flags & MIME_NEW_MESSAGE) == 0)
    return EINVAL;
  if ((ret = _mime_append_part (mime, msg, 0, 0, 0)) == 0)
    ret = _mime_set_content_type (mime);
  return ret;
905 906
}

907
int
908
mime_get_message (mime_t mime, message_t * msg)
909
{
910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937
  stream_t body_stream;
  body_t body;
  int ret = 0;

  if (mime == NULL || msg == NULL)
    return EINVAL;
  if (mime->msg == NULL)
    {
      if ((mime->flags & MIME_NEW_MESSAGE) == 0)
	return EINVAL;
      if ((ret = message_create (&mime->msg, mime)) == 0)
	{
	  if ((ret = header_create (&mime->hdrs, NULL, 0, mime->msg)) == 0)
	    {
	      message_set_header (mime->msg, mime->hdrs, mime);
	      header_set_value (mime->hdrs, MU_HEADER_MIME_VERSION, "1.0", 0);
	      if ((ret = _mime_set_content_type (mime)) == 0)
		{
		  if ((ret = body_create (&body, mime->msg)) == 0)
		    {
		      message_set_body (mime->msg, body, mime);
		      body_set_size (body, _mime_body_size, mime->msg);
		      body_set_lines (body, _mime_body_lines, mime->msg);
		      if ((ret =
			   stream_create (&body_stream, MU_STREAM_READ, body))
			  == 0)
			{
			  stream_set_read (body_stream, _mime_body_read, body);
938
			  stream_set_get_transport2 (body_stream, _mime_body_transport, body);
939 940 941
			  body_set_stream (body, body_stream, mime->msg);
			  *msg = mime->msg;
			  return 0;
942
			}
943
		    }
944
		}
945 946 947
	    }
	  message_destroy (&mime->msg, mime);
	  mime->msg = NULL;
948
	}
949 950 951 952
    }
  if (ret == 0)
    *msg = mime->msg;
  return ret;
953
}
954

955
int
956
mime_is_multipart (mime_t mime)
957
{
958 959 960 961
  if (mime->content_type)
    return (strncasecmp ("multipart", mime->content_type,
			 strlen ("multipart")) ? 0 : 1);
  return 0;
962
}