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/*
* Copyright (C) 2006 Benjamin Zores
* Network helpers for UDP connections (originally borrowed from rtp.c).
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "config.h"
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <unistd.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/time.h>
#include <ctype.h>
#ifndef HAVE_WINSOCK2
#include <netdb.h>
#include <netinet/in.h>
#include <sys/socket.h>
#include <arpa/inet.h>
#define closesocket close
#else
#include <winsock2.h>
#include <ws2tcpip.h>
#endif
#include "mp_msg.h"
#include "url.h"
#include "udp.h"
int reuse_socket=0;
/* Start listening on a UDP port. If multicast, join the group. */
int
udp_open_socket (URL_t *url)
{
int socket_server_fd, rxsockbufsz;
int err;
socklen_t err_len;
fd_set set;
struct sockaddr_in server_address;
struct ip_mreq mcast;
struct timeval tv;
struct hostent *hp;
int reuse=reuse_socket;
mp_msg (MSGT_NETWORK, MSGL_V,
"Listening for traffic on %s:%d ...\n", url->hostname, url->port);
socket_server_fd = socket (AF_INET, SOCK_DGRAM, 0);
if (socket_server_fd == -1)
{
mp_msg (MSGT_NETWORK, MSGL_ERR, "Failed to create socket\n");
return -1;
}
if (isalpha (url->hostname[0]))
{
#ifndef HAVE_WINSOCK2
hp = (struct hostent *) gethostbyname (url->hostname);
if (!hp)
{
mp_msg (MSGT_NETWORK, MSGL_ERR,
"Counldn't resolve name: %s\n", url->hostname);
closesocket (socket_server_fd);
return -1;
}
memcpy ((void *) &server_address.sin_addr.s_addr,
(void *) hp->h_addr_list[0], hp->h_length);
#else
server_address.sin_addr.s_addr = htonl (INADDR_ANY);
#endif /* HAVE_WINSOCK2 */
}
else
{
#ifndef HAVE_WINSOCK2
#ifdef USE_ATON
inet_aton (url->hostname, &server_address.sin_addr);
#else
inet_pton (AF_INET, url->hostname, &server_address.sin_addr);
#endif /* USE_ATON */
#else
server_address.sin_addr.s_addr = htonl(INADDR_ANY);
#endif /* HAVE_WINSOCK2 */
}
server_address.sin_family = AF_INET;
server_address.sin_port = htons (url->port);
if(reuse_socket && setsockopt(socket_server_fd, SOL_SOCKET, SO_REUSEADDR, &reuse, sizeof(reuse)))
mp_msg(MSGT_NETWORK, MSGL_ERR, "SO_REUSEADDR failed! ignore.\n");
if (bind (socket_server_fd, (struct sockaddr *) &server_address,
sizeof (server_address)) == -1)
{
#ifndef HAVE_WINSOCK2
if (errno != EINPROGRESS)
#else
if (WSAGetLastError () != WSAEINPROGRESS)
#endif /* HAVE_WINSOCK2 */
{
mp_msg (MSGT_NETWORK, MSGL_ERR, "Failed to connect to server\n");
closesocket (socket_server_fd);
return -1;
}
}
#ifdef HAVE_WINSOCK2
if (isalpha (url->hostname[0]))
{
hp = (struct hostent *) gethostbyname (url->hostname);
if (!hp)
{
mp_msg (MSGT_NETWORK, MSGL_ERR,
"Counldn't resolve name: %s\n", url->hostname);
closesocket (socket_server_fd);
return -1;
}
memcpy ((void *) &server_address.sin_addr.s_addr,
(void *) hp->h_addr, hp->h_length);
}
else
{
unsigned int addr = inet_addr (url->hostname);
memcpy ((void *) &server_address.sin_addr, (void *) &addr, sizeof (addr));
}
#endif /* HAVE_WINSOCK2 */
/* Increase the socket rx buffer size to maximum -- this is UDP */
rxsockbufsz = 240 * 1024;
if (setsockopt (socket_server_fd, SOL_SOCKET, SO_RCVBUF,
&rxsockbufsz, sizeof (rxsockbufsz)))
{
mp_msg (MSGT_NETWORK, MSGL_ERR,
"Couldn't set receive socket buffer size\n");
}
if ((ntohl (server_address.sin_addr.s_addr) >> 28) == 0xe)
{
mcast.imr_multiaddr.s_addr = server_address.sin_addr.s_addr;
mcast.imr_interface.s_addr = 0;
if (setsockopt (socket_server_fd, IPPROTO_IP,
IP_ADD_MEMBERSHIP, &mcast, sizeof (mcast)))
{
mp_msg (MSGT_NETWORK, MSGL_ERR, "IP_ADD_MEMBERSHIP failed (do you have multicasting enabled in your kernel?)\n");
closesocket (socket_server_fd);
return -1;
}
}
tv.tv_sec = 1; /* 1 second timeout */
tv.tv_usec = 0;
FD_ZERO (&set);
FD_SET (socket_server_fd, &set);
err = select (socket_server_fd + 1, &set, NULL, NULL, &tv);
if (err < 0)
{
mp_msg (MSGT_NETWORK, MSGL_FATAL,
"Select failed: %s\n", strerror (errno));
closesocket (socket_server_fd);
return -1;
}
if (err == 0)
{
mp_msg (MSGT_NETWORK, MSGL_ERR,
"Timeout! No data from host %s\n", url->hostname);
closesocket (socket_server_fd);
return -1;
}
err_len = sizeof (err);
getsockopt (socket_server_fd, SOL_SOCKET, SO_ERROR, &err, &err_len);
if (err)
{
mp_msg (MSGT_NETWORK, MSGL_DBG2, "Socket error: %d\n", err);
closesocket (socket_server_fd);
return -1;
}
return socket_server_fd;
}
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