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
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
|
/*
* Network layer for MPlayer
* by Bertrand BAUDET <bertrand_baudet@yahoo.com>
* (C) 2001, MPlayer team.
*/
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <errno.h>
#include <ctype.h>
#include <fcntl.h>
#include <sys/time.h>
#include <sys/types.h>
#include "config.h"
#include "mp_msg.h"
#include "help_mp.h"
#if !HAVE_WINSOCK2_H
#include <netdb.h>
#include <netinet/in.h>
#include <sys/socket.h>
#include <arpa/inet.h>
#else
#include <winsock2.h>
#include <ws2tcpip.h>
#endif
#include "network.h"
#include "stream.h"
#include "tcp.h"
/* IPv6 options */
int network_prefer_ipv4 = 0;
// Converts an address family constant to a string
static const char *af2String(int af) {
switch (af) {
case AF_INET: return "AF_INET";
#ifdef HAVE_AF_INET6
case AF_INET6: return "AF_INET6";
#endif
default: return "Unknown address family!";
}
}
// Connect to a server using a TCP connection, with specified address family
// return -2 for fatal error, like unable to resolve name, connection timeout...
// return -1 is unable to connect to a particular port
static int
connect2Server_with_af(char *host, int port, int af,int verb) {
int socket_server_fd;
int err;
socklen_t err_len;
int ret,count = 0;
fd_set set;
struct timeval tv;
union {
struct sockaddr_in four;
#ifdef HAVE_AF_INET6
struct sockaddr_in6 six;
#endif
} server_address;
size_t server_address_size;
void *our_s_addr; // Pointer to sin_addr or sin6_addr
struct hostent *hp=NULL;
char buf[255];
#if HAVE_WINSOCK2_H
unsigned long val;
int to;
#else
struct timeval to;
#endif
socket_server_fd = socket(af, SOCK_STREAM, 0);
if( socket_server_fd==-1 ) {
// mp_msg(MSGT_NETWORK,MSGL_ERR,"Failed to create %s socket:\n", af2String(af));
return TCP_ERROR_FATAL;
}
#if defined(SO_RCVTIMEO) && defined(SO_SNDTIMEO)
#if HAVE_WINSOCK2_H
/* timeout in milliseconds */
to = 10 * 1000;
#else
to.tv_sec = 10;
to.tv_usec = 0;
#endif
setsockopt(socket_server_fd, SOL_SOCKET, SO_RCVTIMEO, &to, sizeof(to));
setsockopt(socket_server_fd, SOL_SOCKET, SO_SNDTIMEO, &to, sizeof(to));
#endif
switch (af) {
case AF_INET: our_s_addr = (void *) &server_address.four.sin_addr; break;
#ifdef HAVE_AF_INET6
case AF_INET6: our_s_addr = (void *) &server_address.six.sin6_addr; break;
#endif
default:
mp_msg(MSGT_NETWORK,MSGL_ERR, MSGTR_MPDEMUX_NW_UnknownAF, af);
return TCP_ERROR_FATAL;
}
memset(&server_address, 0, sizeof(server_address));
#if HAVE_INET_PTON
if (inet_pton(af, host, our_s_addr)!=1)
#elif HAVE_INET_ATON
if (inet_aton(host, our_s_addr)!=1)
#elif HAVE_WINSOCK2_H
if ( inet_addr(host)==INADDR_NONE )
#endif
{
if(verb) mp_msg(MSGT_NETWORK,MSGL_STATUS,MSGTR_MPDEMUX_NW_ResolvingHostForAF, host, af2String(af));
#ifdef HAVE_GETHOSTBYNAME2
hp=(struct hostent*)gethostbyname2( host, af );
#else
hp=(struct hostent*)gethostbyname( host );
#endif
if( hp==NULL ) {
if(verb) mp_msg(MSGT_NETWORK,MSGL_ERR,MSGTR_MPDEMUX_NW_CantResolv, af2String(af), host);
return TCP_ERROR_FATAL;
}
memcpy( our_s_addr, (void*)hp->h_addr_list[0], hp->h_length );
}
#if HAVE_WINSOCK2_H
else {
unsigned long addr = inet_addr(host);
memcpy( our_s_addr, (void*)&addr, sizeof(addr) );
}
#endif
switch (af) {
case AF_INET:
server_address.four.sin_family=af;
server_address.four.sin_port=htons(port);
server_address_size = sizeof(server_address.four);
break;
#ifdef HAVE_AF_INET6
case AF_INET6:
server_address.six.sin6_family=af;
server_address.six.sin6_port=htons(port);
server_address_size = sizeof(server_address.six);
break;
#endif
default:
mp_msg(MSGT_NETWORK,MSGL_ERR, MSGTR_MPDEMUX_NW_UnknownAF, af);
return TCP_ERROR_FATAL;
}
#if HAVE_INET_ATON || defined(HAVE_WINSOCK2_H)
strncpy( buf, inet_ntoa( *((struct in_addr*)our_s_addr) ), 255);
#else
inet_ntop(af, our_s_addr, buf, 255);
#endif
if(verb) mp_msg(MSGT_NETWORK,MSGL_STATUS,MSGTR_MPDEMUX_NW_ConnectingToServer, host, buf , port );
// Turn the socket as non blocking so we can timeout on the connection
#if !HAVE_WINSOCK2_H
fcntl( socket_server_fd, F_SETFL, fcntl(socket_server_fd, F_GETFL) | O_NONBLOCK );
#else
val = 1;
ioctlsocket( socket_server_fd, FIONBIO, &val );
#endif
if( connect( socket_server_fd, (struct sockaddr*)&server_address, server_address_size )==-1 ) {
#if !HAVE_WINSOCK2_H
if( errno!=EINPROGRESS ) {
#else
if( (WSAGetLastError() != WSAEINPROGRESS) && (WSAGetLastError() != WSAEWOULDBLOCK) ) {
#endif
if(verb) mp_msg(MSGT_NETWORK,MSGL_ERR,MSGTR_MPDEMUX_NW_CantConnect2Server, af2String(af));
closesocket(socket_server_fd);
return TCP_ERROR_PORT;
}
}
tv.tv_sec = 0;
tv.tv_usec = 500000;
FD_ZERO( &set );
FD_SET( socket_server_fd, &set );
// When the connection will be made, we will have a writeable fd
while((ret = select(socket_server_fd+1, NULL, &set, NULL, &tv)) == 0) {
if(count > 30 || stream_check_interrupt(500)) {
if(count > 30)
mp_msg(MSGT_NETWORK,MSGL_ERR,MSGTR_MPDEMUX_NW_ConnTimeout);
else
mp_msg(MSGT_NETWORK,MSGL_V,"Connection interrupted by user\n");
return TCP_ERROR_TIMEOUT;
}
count++;
FD_ZERO( &set );
FD_SET( socket_server_fd, &set );
tv.tv_sec = 0;
tv.tv_usec = 500000;
}
if (ret < 0) mp_msg(MSGT_NETWORK,MSGL_ERR,MSGTR_MPDEMUX_NW_SelectFailed);
// Turn back the socket as blocking
#if !HAVE_WINSOCK2_H
fcntl( socket_server_fd, F_SETFL, fcntl(socket_server_fd, F_GETFL) & ~O_NONBLOCK );
#else
val = 0;
ioctlsocket( socket_server_fd, FIONBIO, &val );
#endif
// Check if there were any errors
err_len = sizeof(int);
ret = getsockopt(socket_server_fd,SOL_SOCKET,SO_ERROR,&err,&err_len);
if(ret < 0) {
mp_msg(MSGT_NETWORK,MSGL_ERR,MSGTR_MPDEMUX_NW_GetSockOptFailed,strerror(errno));
return TCP_ERROR_FATAL;
}
if(err > 0) {
mp_msg(MSGT_NETWORK,MSGL_ERR,MSGTR_MPDEMUX_NW_ConnectError,strerror(err));
return TCP_ERROR_PORT;
}
return socket_server_fd;
}
// Connect to a server using a TCP connection
// return -2 for fatal error, like unable to resolve name, connection timeout...
// return -1 is unable to connect to a particular port
int
connect2Server(char *host, int port, int verb) {
#ifdef HAVE_AF_INET6
int r;
int s = TCP_ERROR_FATAL;
r = connect2Server_with_af(host, port, network_prefer_ipv4 ? AF_INET:AF_INET6,verb);
if (r >= 0) return r;
s = connect2Server_with_af(host, port, network_prefer_ipv4 ? AF_INET6:AF_INET,verb);
if (s == TCP_ERROR_FATAL) return r;
return s;
#else
return connect2Server_with_af(host, port, AF_INET,verb);
#endif
}
|
