gstreamer/gst/udp/gstudpnetutils.c

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/* GStreamer UDP network utility functions
* Copyright (C) 2006 Tim-Philipp Müller <tim centricular net>
* Copyright (C) 2006 Joni Valtanen <joni.valtanen@movial.fi>
* Copyright (C) 2009 Jarkko Palviainen <jarkko.palviainen@sesca.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <errno.h>
#include <stdio.h>
#include <memory.h>
#include "gstudpnetutils.h"
/* EAI_ADDRFAMILY was obsoleted in BSD at some point */
#ifndef EAI_ADDRFAMILY
#define EAI_ADDRFAMILY 1
#endif
#ifdef G_OS_WIN32
gboolean
gst_udp_net_utils_win32_wsa_startup (GstObject * obj)
{
WSADATA w;
int error;
error = WSAStartup (0x0202, &w);
if (error) {
GST_WARNING_OBJECT (obj, "WSAStartup error: %d", error);
return FALSE;
}
if (w.wVersion != 0x0202) {
WSACleanup ();
GST_WARNING_OBJECT (obj, "Winsock version wrong : 0x%x", w.wVersion);
return FALSE;
}
return TRUE;
}
#endif
int
gst_udp_get_sockaddr_length (struct sockaddr_storage *addr)
{
/* MacOS is picky about passing precisely the correct length,
* so we calculate it here for the given socket type.
*/
switch (addr->ss_family) {
case AF_INET:
return sizeof (struct sockaddr_in);
case AF_INET6:
return sizeof (struct sockaddr_in6);
default:
/* don't know, Screw MacOS and use the full length */
return sizeof (*addr);
}
}
int
gst_udp_get_addr (const char *hostname, int port, struct sockaddr_storage *addr)
{
struct addrinfo hints, *res = NULL, *nres;
char service[NI_MAXSERV];
int ret;
memset (&hints, 0, sizeof (hints));
hints.ai_family = AF_UNSPEC;
hints.ai_socktype = SOCK_DGRAM;
g_snprintf (service, sizeof (service) - 1, "%d", port);
service[sizeof (service) - 1] = '\0';
if ((ret = getaddrinfo (hostname, (port == -1) ? NULL : service, &hints,
&res)) < 0) {
goto beach;
}
nres = res;
while (nres) {
if (nres->ai_family == AF_INET || nres->ai_family == AF_INET6)
break;
nres = nres->ai_next;
}
if (nres) {
memcpy (addr, nres->ai_addr, nres->ai_addrlen);
} else {
ret = EAI_ADDRFAMILY;
}
freeaddrinfo (res);
beach:
return ret;
}
int
gst_udp_set_loop (int sockfd, gboolean loop)
{
socklen_t socklen;
struct sockaddr_storage addr;
int ret = -1;
int l = (loop == FALSE) ? 0 : 1;
socklen = sizeof (addr);
if ((ret = getsockname (sockfd, (struct sockaddr *) &addr, &socklen)) < 0) {
return ret;
}
switch (addr.ss_family) {
case AF_INET:
{
ret = setsockopt (sockfd, IPPROTO_IP, IP_MULTICAST_LOOP, &l, sizeof (l));
if (ret < 0)
return ret;
break;
}
case AF_INET6:
{
ret =
setsockopt (sockfd, IPPROTO_IPV6, IPV6_MULTICAST_LOOP, &l,
sizeof (l));
if (ret < 0)
return ret;
break;
}
default:
#ifdef G_OS_WIN32
WSASetLastError (WSAEAFNOSUPPORT);
#else
errno = EAFNOSUPPORT;
#endif
}
return ret;
}
int
gst_udp_set_ttl (int sockfd, int ttl, gboolean is_multicast)
{
socklen_t socklen;
struct sockaddr_storage addr;
int optname = -1;
int ret = -1;
socklen = sizeof (addr);
if ((ret = getsockname (sockfd, (struct sockaddr *) &addr, &socklen)) < 0) {
return ret;
}
switch (addr.ss_family) {
case AF_INET:
{
optname = (is_multicast == TRUE) ? IP_MULTICAST_TTL : IP_TTL;
ret = setsockopt (sockfd, IPPROTO_IP, optname, &ttl, sizeof (ttl));
if (ret < 0)
return ret;
break;
}
case AF_INET6:
{
optname =
(is_multicast == TRUE) ? IPV6_MULTICAST_HOPS : IPV6_UNICAST_HOPS;
ret = setsockopt (sockfd, IPPROTO_IPV6, optname, &ttl, sizeof (ttl));
if (ret < 0)
return ret;
/* When using IPV4 address with IPV6 socket, both TTL values
must be set in order to actually use the given value.
Has no effect when IPV6 address is used. */
optname = (is_multicast == TRUE) ? IP_MULTICAST_TTL : IP_TTL;
ret = setsockopt (sockfd, IPPROTO_IP, optname, &ttl, sizeof (ttl));
if (ret < 0)
return ret;
break;
}
default:
#ifdef G_OS_WIN32
WSASetLastError (WSAEAFNOSUPPORT);
#else
errno = EAFNOSUPPORT;
#endif
}
return ret;
}
/* FIXME: Add interface selection for windows hosts. */
int
gst_udp_join_group (int sockfd, struct sockaddr_storage *addr, gchar * iface)
{
int ret = -1;
switch (addr->ss_family) {
case AF_INET:
{
#ifdef HAVE_IP_MREQN
struct ip_mreqn mreq4;
#else
struct ip_mreq mreq4;
#endif
memset (&mreq4, 0, sizeof (mreq4));
mreq4.imr_multiaddr.s_addr =
((struct sockaddr_in *) addr)->sin_addr.s_addr;
#ifdef HAVE_IP_MREQN
if (iface)
mreq4.imr_ifindex = if_nametoindex (iface);
else
mreq4.imr_ifindex = 0; /* Pick any. */
#else
mreq4.imr_interface.s_addr = INADDR_ANY;
#endif
if ((ret =
setsockopt (sockfd, IPPROTO_IP, IP_ADD_MEMBERSHIP,
(const void *) &mreq4, sizeof (mreq4))) < 0)
return ret;
break;
}
case AF_INET6:
{
struct ipv6_mreq mreq6;
memset (&mreq6, 0, sizeof (mreq6));
memcpy (&mreq6.ipv6mr_multiaddr,
&(((struct sockaddr_in6 *) addr)->sin6_addr),
sizeof (struct in6_addr));
mreq6.ipv6mr_interface = 0;
#if !defined(G_OS_WIN32)
if (iface)
mreq6.ipv6mr_interface = if_nametoindex (iface);
#endif
if ((ret =
setsockopt (sockfd, IPPROTO_IPV6, IPV6_JOIN_GROUP,
(const void *) &mreq6, sizeof (mreq6))) < 0)
return ret;
break;
}
default:
#ifdef G_OS_WIN32
WSASetLastError (WSAEAFNOSUPPORT);
#else
errno = EAFNOSUPPORT;
#endif
}
return ret;
}
int
gst_udp_leave_group (int sockfd, struct sockaddr_storage *addr)
{
int ret = -1;
switch (addr->ss_family) {
case AF_INET:
{
struct ip_mreq mreq4;
memset (&mreq4, 0, sizeof (mreq4));
mreq4.imr_multiaddr.s_addr =
((struct sockaddr_in *) addr)->sin_addr.s_addr;
mreq4.imr_interface.s_addr = INADDR_ANY;
if ((ret =
setsockopt (sockfd, IPPROTO_IP, IP_DROP_MEMBERSHIP,
(const void *) &mreq4, sizeof (mreq4))) < 0)
return ret;
}
break;
case AF_INET6:
{
struct ipv6_mreq mreq6;
memset (&mreq6, 0, sizeof (mreq6));
memcpy (&mreq6.ipv6mr_multiaddr,
&(((struct sockaddr_in6 *) addr)->sin6_addr),
sizeof (struct in6_addr));
mreq6.ipv6mr_interface = 0;
if ((ret =
setsockopt (sockfd, IPPROTO_IPV6, IPV6_LEAVE_GROUP,
(const void *) &mreq6, sizeof (mreq6))) < 0)
return ret;
}
break;
default:
#ifdef G_OS_WIN32
WSASetLastError (WSAEAFNOSUPPORT);
#else
errno = EAFNOSUPPORT;
#endif
}
return ret;
}
int
gst_udp_is_multicast (struct sockaddr_storage *addr)
{
int ret = -1;
switch (addr->ss_family) {
case AF_INET:
{
struct sockaddr_in *addr4 = (struct sockaddr_in *) addr;
ret = IN_MULTICAST (g_ntohl (addr4->sin_addr.s_addr));
}
break;
case AF_INET6:
{
struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *) addr;
ret = IN6_IS_ADDR_MULTICAST (&addr6->sin6_addr);
}
break;
default:
#ifdef G_OS_WIN32
WSASetLastError (WSAEAFNOSUPPORT);
#else
errno = EAFNOSUPPORT;
#endif
}
return ret;
}