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/* GNU Mailutils -- a suite of utilities for electronic mail
Copyright (C) 1999-2002, 2004-2007, 2009-2012, 2014-2018 Free
Software Foundation, Inc.
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 3 of the License, or (at your option) any later version.
This library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General
Public License along with this library. If not, see
<http://www.gnu.org/licenses/>. */
#include <config.h>
#include <stdlib.h>
#include <string.h>
#include <mailutils/types.h>
#include <mailutils/message.h>
#include <mailutils/errno.h>
#include <mailutils/header.h>
#include <mailutils/stream.h>
#include <mailutils/sys/message.h>
enum eoh_state
{
eoh_no,
eoh_maybe,
eoh_yes
};
/* Message header stuff */
static enum eoh_state
string_find_eoh (enum eoh_state eoh, const char *str, size_t len,
size_t *ppos)
{
size_t pos;
if (eoh == eoh_maybe && *str == '\n')
{
*ppos = 0;
return eoh_yes;
}
for (pos = 0; pos < len - 1; pos++)
if (str[pos] == '\n' && str[pos + 1] == '\n')
{
*ppos = pos + 1;
return eoh_yes;
}
*ppos = pos + 1;
return str[pos] == '\n' ? eoh_maybe : eoh_no;
}
#define MIN_HEADER_BUF_SIZE 2048
static int
_header_fill (mu_stream_t stream, char **pbuf, size_t *plen)
{
int status = 0;
char *buffer = NULL;
size_t bufsize = 0;
char inbuf[MIN_HEADER_BUF_SIZE];
size_t nread;
enum eoh_state eoh = eoh_no;
status = mu_stream_seek (stream, 0, MU_SEEK_SET, NULL);
if (status)
return status;
while (eoh != eoh_yes
&& (status = mu_stream_read (stream, inbuf, sizeof (inbuf), &nread))
== 0
&& nread)
{
char *nbuf;
size_t len;
eoh = string_find_eoh (eoh, inbuf, nread, &len);
nbuf = realloc (buffer, bufsize + len);
if (!nbuf)
{
status = ENOMEM;
break;
}
memcpy (nbuf + bufsize, inbuf, len);
buffer = nbuf;
bufsize += len;
}
if (status)
free (buffer);
else
{
*pbuf = buffer;
*plen = bufsize;
}
return status;
}
static int
message_header_fill (void *data, char **pbuf, size_t *plen)
{
mu_message_t msg = data;
return _header_fill (msg->rawstream, pbuf, plen);
}
int
mu_message_get_header (mu_message_t msg, mu_header_t *phdr)
{
if (msg == NULL)
return EINVAL;
if (phdr == NULL)
return MU_ERR_OUT_PTR_NULL;
if (msg->header == NULL)
{
mu_header_t header;
int status = mu_header_create (&header, NULL, 0);
if (status != 0)
return status;
if (msg->rawstream)
mu_header_set_fill (header, message_header_fill, msg);
status = mu_header_size (header, &msg->orig_header_size);
if (status)
return status;
msg->header = header;
}
*phdr = msg->header;
return 0;
}
/* Note: mu_message_set_header steals the reference to hdr */
int
mu_message_set_header (mu_message_t msg, mu_header_t hdr, void *owner)
{
if (msg == NULL )
return EINVAL;
if (msg->owner != owner)
return EACCES;
if (msg->header)
mu_header_destroy (&msg->header);
msg->header = hdr;
msg->flags |= MESSAGE_MODIFIED;
return 0;
}
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