/* 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. */
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;
}
int
mu_nntp_help (mu_nntp_t nntp, mu_stream_t *pstream)
{
int status;
if (nntp == NULL)
return EINVAL;
if (pstream == NULL)
return MU_ERR_OUT_PTR_NULL;
switch (nntp->state)
{
case MU_NNTP_NO_STATE:
status = mu_nntp_writeline (nntp, "HELP\r\n");
MU_NNTP_CHECK_ERROR (nntp, status);
mu_nntp_debug_cmd (nntp);
nntp->state = MU_NNTP_HELP;
case MU_NNTP_HELP:
status = mu_nntp_send (nntp);
MU_NNTP_CHECK_EAGAIN (nntp, status);
nntp->acknowledge = 0;
nntp->state = MU_NNTP_HELP_ACK;
case MU_NNTP_HELP_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_HELP_FOLLOW);
nntp->state = MU_NNTP_HELP_RX;
case MU_NNTP_HELP_RX:
status = mu_nntp_stream_create (nntp, pstream);
MU_NNTP_CHECK_ERROR (nntp, status);
break;
/* They must deal with the error first by reopening. */
case MU_NNTP_ERROR:
status = ECANCELED;
break;
default:
status = EINPROGRESS;
}
return status;
}
/*
LIST EXTENSIONS command, return an iterator that contains the result.
It is the responsability of the caller to destroy the iterator(mu_iterator_destroy).
*/
int
mu_nntp_list_extensions (mu_nntp_t nntp, mu_iterator_t *piterator)
{
int status = 0;
if (nntp == NULL)
return EINVAL;
if (piterator == NULL)
return MU_ERR_OUT_PTR_NULL;
switch (nntp->state)
{
case MU_NNTP_NO_STATE:
status = mu_nntp_writeline (nntp, "LIST EXTENSIONS\r\n");
MU_NNTP_CHECK_ERROR (nntp, status);
mu_nntp_debug_cmd (nntp);
nntp->state = MU_NNTP_LIST_EXTENSIONS;
case MU_NNTP_LIST_EXTENSIONS:
status = mu_nntp_send (nntp);
MU_NNTP_CHECK_EAGAIN (nntp, status);
nntp->acknowledge = 0;
nntp->state = MU_NNTP_LIST_EXTENSIONS_ACK;
case MU_NNTP_LIST_EXTENSIONS_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_EXTENSIONS_FOLLOW);
status = mu_nntp_iterator_create (nntp, piterator);
MU_NNTP_CHECK_ERROR(nntp, status);
nntp->state = MU_NNTP_LIST_EXTENSIONS_RX;
case MU_NNTP_LIST_EXTENSIONS_RX:
break;
/* They must deal with the error first by reopening. */
case MU_NNTP_ERROR:
status = ECANCELED;
break;
default:
status = EINPROGRESS;
}
return status;
}
