1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
|
/*
* 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,
"Could not 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;
}
|
