nntp_connect.c
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/* GNU Mailutils -- a suite of utilities for electronic mail
Copyright (C) 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 <sys/time.h>
#include <unistd.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <mailutils/sys/nntp.h>
/* Open the connection to the server. */
int
mu_nntp_connect (mu_nntp_t nntp)
{
int status;
/* Sanity checks. */
if (nntp == NULL)
return EINVAL;
/* A networking stack. */
if (nntp->carrier == NULL)
return EINVAL;
/* Enter the nntp state machine, and boogy */
switch (nntp->state)
{
default:
/* FALLTHROUGH */
/* If nntp was in an error state going through here should clear it. */
case MU_NNTP_NO_STATE:
status = mu_nntp_disconnect (nntp);
MU_NNTP_CHECK_EAGAIN (nntp, status);
nntp->state = MU_NNTP_CONNECT;
case MU_NNTP_CONNECT:
/* Establish the connection. */
if (!mu_stream_is_open (nntp->carrier))
{
status = mu_stream_open (nntp->carrier);
MU_NNTP_CHECK_EAGAIN (nntp, status);
}
nntp->acknowledge = 0;
nntp->state = MU_NNTP_GREETINGS;
case MU_NNTP_GREETINGS:
/* Get the greetings. */
{
size_t len = 0;
int code;
status = mu_nntp_response (nntp, NULL, 0, &len);
MU_NNTP_CHECK_EAGAIN (nntp, status);
mu_nntp_debug_ack (nntp);
/* 200 Service available, posting allowed */
/* 201 Servie available, posting prohibited */
code = mu_nntp_response_code(nntp);
if (code != MU_NNTP_RESP_CODE_POSTING_ALLOWED && code != MU_NNTP_RESP_CODE_POSTING_PROHIBITED)
{
mu_stream_close (nntp->carrier);
nntp->state = MU_NNTP_NO_STATE;
return EACCES;
}
nntp->state = MU_NNTP_NO_STATE;
}
} /* End AUTHORISATION state. */
return status;
}