biffnotify.c
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/* GNU Mailutils -- a suite of utilities for electronic mail
Copyright (C) 2014 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 <unistd.h>
#include <stdlib.h>
#include <string.h>
#include <netinet/in.h>
#include <netdb.h>
#include <mailutils/errno.h>
#include <mailutils/observer.h>
#include <mailutils/io.h>
#include <mailutils/url.h>
#include <mailutils/mu_auth.h>
#include <mailutils/sys/mailbox.h>
static int
get_notify_fd (mu_mailbox_t mbox)
{
int fd = mbox->notify_fd;
if (fd == -1)
{
struct sockaddr_in biff_in;
struct servent *sp;
if ((sp = getservbyname ("biff", "udp")) == NULL)
return -1;
biff_in.sin_family = AF_INET;
biff_in.sin_addr.s_addr = htonl (INADDR_LOOPBACK);
biff_in.sin_port = sp->s_port;
fd = socket (PF_INET, SOCK_DGRAM, 0);
if (fd < 0)
return -1;
mbox->notify_sa = malloc (sizeof (biff_in));
if (!mbox->notify_sa)
{
close (fd);
return -1;
}
memcpy (mbox->notify_sa, &biff_in, sizeof (biff_in));
mbox->notify_fd = fd;
}
return fd;
}
static int
biff_notify (mu_observer_t obs, size_t type, void *data, void *action_data)
{
mu_mailbox_t mbox = mu_observer_get_owner (obs);
if (type == MU_EVT_MAILBOX_MESSAGE_APPEND && mbox->notify_user)
{
mu_message_qid_t qid = data;
mu_url_t url;
char *buf;
int fd = get_notify_fd (mbox);
if (fd < 0)
{
mu_observable_t observable;
mu_mailbox_get_observable (mbox, &observable);
mu_observable_detach (observable, obs);
return 0;
}
mu_mailbox_get_url (mbox, &url);
if (mu_asprintf (&buf, "%s@%s:%s", mbox->notify_user,
qid, mu_url_to_string (url)))
return 0;
mu_mailbox_flush (mbox, 0);
if (buf)
{
sendto (fd, buf, strlen (buf), 0,
mbox->notify_sa, sizeof (struct sockaddr_in));
/*FIXME: on error?*/
free (buf);
}
}
return 0;
}
int
mu_mailbox_set_notify (mu_mailbox_t mbox, const char *user)
{
mu_observer_t observer;
mu_observable_t observable;
if (!mbox)
return EINVAL;
if (user)
user = strdup (user);
else
{
struct mu_auth_data *auth = NULL;
auth = mu_get_auth_by_uid (getuid ());
if (!auth)
return MU_ERR_NO_SUCH_USER;
user = strdup (auth->name);
}
if (!user)
return ENOMEM;
if (mbox->notify_user)
free (mbox->notify_user);
mbox->notify_user = (char*) user;
if (!(mbox->flags & _MU_MAILBOX_NOTIFY))
{
mu_observer_create (&observer, mbox);
mu_observer_set_action (observer, biff_notify, mbox);
mu_mailbox_get_observable (mbox, &observable);
mu_observable_attach (observable, MU_EVT_MAILBOX_MESSAGE_APPEND,
observer);
mbox->flags |= _MU_MAILBOX_NOTIFY;
}
return 0;
}
int
mu_mailbox_unset_notify (mu_mailbox_t mbox)
{
if (!mbox)
return EINVAL;
if (!mbox->notify_user)
return EINVAL;
free (mbox->notify_user);
mbox->notify_user = NULL;
close (mbox->notify_fd);
mbox->notify_fd = -1;
free (mbox->notify_sa);
mbox->notify_sa = NULL;
return 0;
}