nntp_ihave.c
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/* GNU Mailutils -- a suite of utilities for electronic mail
Copyright (C) 1999, 2000, 2001, 2004, 2007, 2010 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 <stdlib.h>
#include <errno.h>
#include <mailutils/sys/nntp.h>
int
mu_nntp_ihave (mu_nntp_t nntp, const char *mid, mu_stream_t stream)
{
int status;
if (nntp == NULL)
return EINVAL;
switch (nntp->state)
{
case MU_NNTP_NO_STATE:
status = mu_nntp_writeline (nntp, "IHAVE %s\r\n", mid);
MU_NNTP_CHECK_ERROR (nntp, status);
mu_nntp_debug_cmd (nntp);
nntp->state = MU_NNTP_IHAVE;
case MU_NNTP_IHAVE:
status = mu_nntp_send (nntp);
MU_NNTP_CHECK_EAGAIN (nntp, status);
nntp->acknowledge = 0;
nntp->state = MU_NNTP_IHAVE_ACK;
case MU_NNTP_IHAVE_ACK:
status = mu_nntp_response (nntp, NULL, 0, NULL);
MU_NNTP_CHECK_EAGAIN (nntp, status);
mu_nntp_debug_ack (nntp);
MU_NNTP_CHECK_CODE (nntp, MU_NNTP_RESP_CODE_TRANSFER_ARTICLE);
if (nntp->post.buf != NULL)
{
free (nntp->post.buf);
}
nntp->post.buf = calloc (1, 256);
if (nntp->post.buf == NULL)
{
MU_NNTP_CHECK_ERROR (nntp, ENOMEM);
}
nntp->post.len = 256;
nntp->post.offset = 0;
nntp->post.nread = 0;
nntp->post.sent_crlf = 0;
nntp->state = MU_NNTP_IHAVE_0;
ihave_loop:
case MU_NNTP_IHAVE_0:
status = mu_stream_readline (stream, nntp->post.buf, nntp->post.len,
&nntp->post.nread);
MU_NNTP_CHECK_EAGAIN (nntp, status);
if (nntp->post.nread > 0)
{
if (nntp->post.buf[nntp->post.nread - 1] == '\n')
{
nntp->post.buf[nntp->post.nread - 1] = '\0';
if (nntp->post.sent_crlf && nntp->post.buf[0] == '.')
{
status = mu_nntp_writeline (nntp, ".%s\r\n", nntp->post.buf);
}
else
{
status = mu_nntp_writeline (nntp, "%s\r\n", nntp->post.buf);
}
nntp->post.sent_crlf = 1;
}
else
{
if (nntp->post.sent_crlf && nntp->post.buf[0] == '.')
{
status = mu_nntp_writeline (nntp, ".%s", nntp->post.buf);
}
else
{
status = mu_nntp_writeline (nntp, "%s", nntp->post.buf);
}
nntp->post.sent_crlf = 0;
}
MU_NNTP_CHECK_ERROR (nntp, status);
}
nntp->state = MU_NNTP_IHAVE_1;
case MU_NNTP_IHAVE_1:
status = mu_nntp_send (nntp);
MU_NNTP_CHECK_EAGAIN (nntp, status);
if (nntp->post.nread > 0)
{
goto ihave_loop;
}
if (nntp->post.sent_crlf)
status = mu_nntp_writeline (nntp, ".\r\n");
else
status = mu_nntp_writeline (nntp, "\r\n.\r\n");
if (nntp->post.buf != NULL)
{
free (nntp->post.buf);
nntp->post.buf = NULL;
nntp->post.len = 0;
nntp->post.offset = 0;
nntp->post.nread = 0;
nntp->post.sent_crlf = 0;
}
MU_NNTP_CHECK_ERROR (nntp, status);
nntp->state = MU_NNTP_IHAVE_2;
case MU_NNTP_POST_2:
status = mu_nntp_send (nntp);
MU_NNTP_CHECK_EAGAIN (nntp, status);
nntp->state = MU_NNTP_IHAVE_3;
case MU_NNTP_POST_3:
status = mu_nntp_response (nntp, NULL, 0, NULL);
MU_NNTP_CHECK_EAGAIN (nntp, status);
mu_nntp_debug_ack (nntp);
MU_NNTP_CHECK_CODE (nntp, MU_NNTP_RESP_CODE_TRANSFER_OK);
nntp->state = MU_NNTP_NO_STATE;
break;
/* They must deal with the error first by reopening. */
case MU_NNTP_ERROR:
status = ECANCELED;
break;
default:
status = EINPROGRESS;
}
return status;
}