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/*
* This file is part of the Nice GLib ICE library.
*
* (C) 2006, 2007 Collabora Ltd.
* Contact: Dafydd Harries
* (C) 2006, 2007 Nokia Corporation. All rights reserved.
* Contact: Kai Vehmanen
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is the Nice GLib ICE library.
*
* The Initial Developers of the Original Code are Collabora Ltd and Nokia
* Corporation. All Rights Reserved.
*
* Contributors:
* Dafydd Harries, Collabora Ltd.
* Rémi Denis-Courmont, Nokia
* Kai Vehmanen
*
* Alternatively, the contents of this file may be used under the terms of the
* the GNU Lesser General Public License Version 2.1 (the "LGPL"), in which
* case the provisions of LGPL are applicable instead of those above. If you
* wish to allow use of your version of this file only under the terms of the
* LGPL and not to allow others to use your version of this file under the
* MPL, indicate your decision by deleting the provisions above and replace
* them with the notice and other provisions required by the LGPL. If you do
* not delete the provisions above, a recipient may use your version of this
* file under either the MPL or the LGPL.
*/
/*
* Implementation of UDP socket interface using Berkeley sockets. (See
* http://en.wikipedia.org/wiki/Berkeley_sockets.)
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include <unistd.h>
#include <string.h>
#include <errno.h>
#include <fcntl.h>
#include "udp-bsd.h"
/*** NiceSocket ***/
static int sock_recv_err (int fd)
{
#ifdef MSG_ERRQUEUE
/* Silently dequeue any error message if any */
struct msghdr hdr;
int saved = errno, val;
memset (&hdr, 0, sizeof (hdr));
val = recvmsg (fd, &hdr, MSG_ERRQUEUE);
errno = saved;
return val == 0;
#else
return 0;
#endif
}
static gint
socket_recv (
NiceSocket *sock,
NiceAddress *from,
guint len,
gchar *buf)
{
gint recvd;
struct sockaddr_storage sa;
socklen_t from_len = sizeof (sa);
recvd = recvfrom (sock->fileno, buf, len, 0, (struct sockaddr *) &sa,
&from_len);
if (recvd == -1)
{
sock_recv_err (sock->fileno);
return -1;
}
nice_address_set_from_sockaddr (from, (struct sockaddr *)&sa);
return recvd;
}
static gboolean
socket_send (
NiceSocket *sock,
const NiceAddress *to,
guint len,
const gchar *buf)
{
struct sockaddr_storage sa;
ssize_t sent;
nice_address_copy_to_sockaddr (to, (struct sockaddr *)&sa);
do
sent = sendto (sock->fileno, buf, len, 0, (struct sockaddr *) &sa,
sizeof (sa));
while ((sent == -1) && sock_recv_err (sock->fileno));
return sent == (ssize_t)len;
}
static gboolean
socket_is_reliable (NiceSocket *sock)
{
return FALSE;
}
static void
socket_close (NiceSocket *sock)
{
close (sock->fileno);
}
NiceSocket *
nice_udp_bsd_socket_new (NiceAddress *addr)
{
int sockfd = -1;
struct sockaddr_storage name;
socklen_t name_len = sizeof (name);
NiceSocket *sock = g_slice_new0 (NiceSocket);
if (!sock) {
return NULL;
}
if (addr != NULL)
{
nice_address_copy_to_sockaddr(addr, (struct sockaddr *)&name);
}
else
{
memset (&name, 0, sizeof (name));
name.ss_family = AF_UNSPEC;
}
#if 0
if ((name.ss_family == AF_INET6) || (name.ss_family == AF_UNSPEC))
{
sockfd = socket (PF_INET6, SOCK_DGRAM, 0);
if (sockfd != -1)
{
int v6 = name.ss_family == AF_INET6;
#if defined (IPV6_V6ONLY)
if (setsockopt (sockfd, IPPROTO_IPV6, IPV6_V6ONLY, &v6, sizeof (v6)))
#else
if (!v6)
#endif
{
close (sockfd);
sockfd = -1;
}
else
{
# ifdef IPV6_RECVERR
int yes = 1;
setsockopt (sockfd, SOL_IPV6, IPV6_RECVERR, &yes, sizeof (yes));
# endif
name.ss_family = AF_INET6;
# ifdef HAVE_SA_LEN
name.ss_len = sizeof (struct sockaddr_in6);
# endif
}
}
}
#endif
if ((sockfd == -1)
&& ((name.ss_family == AF_UNSPEC) || (name.ss_family == AF_INET)))
{
sockfd = socket (PF_INET, SOCK_DGRAM, 0);
name.ss_family = AF_INET;
#ifdef HAVE_SA_LEN
name.ss_len = sizeof (struct sockaddr_in);
#endif
}
if (sockfd == -1) {
g_slice_free (NiceSocket, sock);
return NULL;
}
#ifdef IP_RECVERR
else
{
int yes = 1;
setsockopt (sockfd, SOL_IP, IP_RECVERR, &yes, sizeof (yes));
}
#endif
#ifdef FD_CLOEXEC
fcntl (sockfd, F_SETFD, fcntl (sockfd, F_GETFD) | FD_CLOEXEC);
#endif
#ifdef O_NONBLOCK
fcntl (sockfd, F_SETFL, fcntl (sockfd, F_GETFL) | O_NONBLOCK);
#endif
if(bind (sockfd, (struct sockaddr *) &name, sizeof (name)) != 0) {
g_slice_free (NiceSocket, sock);
close (sockfd);
return NULL;
}
if (getsockname (sockfd, (struct sockaddr *) &name, &name_len) != 0) {
g_slice_free (NiceSocket, sock);
close (sockfd);
return NULL;
}
nice_address_set_from_sockaddr (&sock->addr, (struct sockaddr *)&name);
sock->fileno = sockfd;
sock->send = socket_send;
sock->recv = socket_recv;
sock->is_reliable = socket_is_reliable;
sock->close = socket_close;
return sock;
}
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