static int
pop_close (mu_mailbox_t mbox)
{
struct _pop3_mailbox *mpd = mbox->data;
int status;
status = mu_pop3_quit (mpd->pop3);
if (status)
mu_error ("mu_pop3_quit failed: %s", mu_strerror (status));
status = mu_pop3_disconnect (mpd->pop3);
if (status)
mu_error ("mu_pop3_disconnect failed: %s", mu_strerror (status));
if (mpd->msg)
{
size_t i;
mu_monitor_wrlock (mbox->monitor);
/* Destroy the pop messages and resources associated to them. */
for (i = 0; i < mpd->msg_count; i++)
{
if (mpd->msg[i])
{
mu_message_destroy (&mpd->msg[i]->message, mpd->msg[i]);
if (mpd->msg[i]->uidl)
free (mpd->msg[i]->uidl);
free (mpd->msg[i]);
}
}
mu_monitor_unlock (mbox->monitor);
}
mu_stream_destroy (&mpd->cache);
return 0;
}
/* Open the connection to the server. The server sends an affirmative greeting
that may contain a timestamp for APOP. */
int
mu_pop3_connect (mu_pop3_t pop3)
{
int status;
/* Sanity checks. */
if (pop3 == NULL)
return EINVAL;
/* A networking stack. */
if (pop3->carrier == NULL)
return EINVAL;
/* Enter the pop state machine, and boogy: AUTHORISATION State. */
switch (pop3->state)
{
default:
/* FALLTHROUGH */
/* If pop3 was in an error state going through here should clear it. */
case MU_POP3_NO_STATE:
/* If the stream was previoulsy open this is sudden death:
for many pop servers, it is important to let them time to remove any locks or move
the .user.pop files. This happen when we do close() and immediately open().
For example, the user does not want to read the entire file, and wants to start
to read a new message, closing the connection and immediately
contacting the server again, and he'll end up having
"-ERR Mail Lock busy" or something similar. To prevent this race
condition we sleep 2 seconds. You can see this behaviour in an
environment where QPopper(Qualcomm POP3 server) is use and the user as a big mailbox. */
status = mu_pop3_disconnect (pop3);
if (status != 0)
mu_pop3_sleep (2);
pop3->state = MU_POP3_CONNECT;
case MU_POP3_CONNECT:
/* Establish the connection. */
status = mu_stream_open (pop3->carrier);
MU_POP3_CHECK_EAGAIN (pop3, status);
pop3->acknowledge = 0;
pop3->state = MU_POP3_GREETINGS;
case MU_POP3_GREETINGS:
/* Get the greetings. */
{
size_t len = 0;
char *right, *left;
status = mu_pop3_response (pop3, NULL, 0, &len);
MU_POP3_CHECK_EAGAIN (pop3, status);
mu_pop3_debug_ack (pop3);
if (mu_c_strncasecmp (pop3->ack.buf, "+OK", 3) != 0)
{
mu_stream_close (pop3->carrier);
pop3->state = MU_POP3_NO_STATE;
return EACCES;
}
/* Get the timestamp. */
right = memchr (pop3->ack.buf, '<', len);
if (right)
{
len = len - (right - pop3->ack.buf);
left = memchr (right, '>', len);
if (left)
{
len = left - right + 1;
pop3->timestamp = calloc (len + 1, 1);
if (pop3->timestamp == NULL)
{
mu_stream_close (pop3->carrier);
MU_POP3_CHECK_ERROR (pop3, ENOMEM);
}
memcpy (pop3->timestamp, right, len);
}
}
pop3->state = MU_POP3_NO_STATE;
}
} /* End AUTHORISATION state. */
return status;
}
