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/* GNU Mailutils -- a suite of utilities for electronic mail
Copyright (C) 2003, 2007, 2010-2012 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/>. */
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include <string.h>
#include <errno.h>
#include <stdlib.h>
#include <mailutils/filter.h>
#include <mailutils/stream.h>
#include <mailutils/sys/stream.h>
#include <mailutils/sys/pop3.h>
/* Implementation of the stream for TOP and RETR. */
#define _POP3F_DONE 0x01
#define _POP3F_CHBUF 0x02
struct mu_pop3_stream
{
struct _mu_stream stream;
mu_pop3_t pop3;
int flags;
struct mu_buffer_query oldbuf;
};
/* Called on _MU_STR_EVENT_SETFLAG */
static void
_pop3_event_cb (mu_stream_t str, int ev, unsigned long flags,
void *ptr MU_ARG_UNUSED)
{
if (flags & _MU_STR_EOF)
{
mu_transport_t trans[2];
if (mu_stream_ioctl (str, MU_IOCTL_TRANSPORT, MU_IOCTL_OP_GET,
trans) == 0)
{
struct mu_pop3_stream *sp = (struct mu_pop3_stream *) trans[0];
_mu_pop3_xscript_level (sp->pop3, MU_XSCRIPT_NORMAL);
sp->pop3->state = MU_POP3_NO_STATE;
if (sp->flags & _POP3F_CHBUF)
{
mu_stream_ioctl (sp->pop3->carrier,
MU_IOCTL_TRANSPORT_BUFFER, MU_IOCTL_OP_SET,
&sp->oldbuf);
sp->flags = _POP3F_DONE;
}
}
}
}
static int
mu_pop3_filter_create (mu_stream_t *pstream, mu_stream_t stream)
{
int rc;
rc = mu_filter_create (pstream, stream, "CRLFDOT", MU_FILTER_DECODE,
MU_STREAM_READ);
if (rc == 0)
{
struct mu_pop3_stream *sp = (struct mu_pop3_stream *) stream;
mu_stream_t str = *pstream;
str->event_cb = _pop3_event_cb;
str->event_mask = _MU_STR_EVMASK(_MU_STR_EVENT_SETFLAG);
sp->oldbuf.type = MU_TRANSPORT_OUTPUT;
if (mu_stream_ioctl (sp->pop3->carrier, MU_IOCTL_TRANSPORT_BUFFER,
MU_IOCTL_OP_GET,
&sp->oldbuf) == 0)
{
struct mu_buffer_query newbuf;
sp->flags |= _POP3F_CHBUF;
newbuf.type = MU_TRANSPORT_OUTPUT;
newbuf.buftype = mu_buffer_full;
newbuf.bufsize = 64*1024;
mu_stream_ioctl (sp->pop3->carrier, MU_IOCTL_TRANSPORT_BUFFER,
MU_IOCTL_OP_SET,
&newbuf);
}
}
return rc;
}
static int
_mu_pop3_read (struct _mu_stream *str, char *buf, size_t bufsize,
size_t *pnread)
{
struct mu_pop3_stream *sp = (struct mu_pop3_stream *)str;
mu_pop3_t pop3 = sp->pop3;
size_t nread;
int status = 0;
if (sp->flags & _POP3F_DONE)
nread = 0;
else
{
status = mu_stream_read (pop3->carrier, buf, bufsize, &nread);
if (status == 0 && nread == 0)
{
pop3->state = MU_POP3_NO_STATE;
sp->flags |= _POP3F_DONE;
}
}
*pnread = nread;
return status;
}
static int
_mu_pop3_readdelim (struct _mu_stream *str, char *buf, size_t bufsize,
int delim, size_t *pnread)
{
struct mu_pop3_stream *sp = (struct mu_pop3_stream *)str;
mu_pop3_t pop3 = sp->pop3;
size_t nread;
int status = 0;
if (sp->flags & _POP3F_DONE)
nread = 0;
else
{
status = mu_stream_readdelim (pop3->carrier, buf, bufsize, delim,
&nread);
if (status == 0 && nread == 0)
{
pop3->state = MU_POP3_NO_STATE;
sp->flags |= _POP3F_DONE;
}
}
*pnread = nread;
return status;
}
static int
_mu_pop3_flush (struct _mu_stream *str)
{
struct mu_pop3_stream *sp = (struct mu_pop3_stream *)str;
mu_pop3_t pop3 = sp->pop3;
return mu_stream_flush (pop3->carrier);
}
static int
_mu_pop3_wait (struct _mu_stream *str, int *pflags, struct timeval *tvp)
{
struct mu_pop3_stream *sp = (struct mu_pop3_stream *)str;
mu_pop3_t pop3 = sp->pop3;
return mu_stream_wait (pop3->carrier, pflags, tvp);
}
int
mu_pop3_stream_create (mu_pop3_t pop3, mu_stream_t *pstream)
{
struct mu_pop3_stream *sp;
mu_stream_t str;
int status;
sp = (struct mu_pop3_stream *) _mu_stream_create (sizeof (*sp),
MU_STREAM_READ |
_MU_STR_OPEN);
if (!sp)
return ENOMEM;
sp->stream.read = _mu_pop3_read;
sp->stream.readdelim = _mu_pop3_readdelim;
sp->stream.flush = _mu_pop3_flush;
sp->stream.wait = _mu_pop3_wait;
sp->pop3 = pop3;
sp->flags = 0;
str = (mu_stream_t) sp;
mu_stream_set_buffer (str, mu_buffer_line, 0);
status = mu_pop3_filter_create (pstream, str);
mu_stream_unref (str);
return status;
}
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