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
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
|
#include <sys/cdefs.h>
#include "namespace.h"
#include <lib.h>
#include <string.h>
#include <assert.h>
#include <errno.h>
#include <stdio.h>
#include <sys/ioctl.h>
#include <sys/socket.h>
#include <sys/types.h>
#include <netinet/tcp.h>
#include <net/gen/in.h>
#include <net/gen/tcp.h>
#include <net/gen/tcp_io.h>
#include <net/gen/udp.h>
#include <net/gen/udp_io.h>
#define DEBUG 0
static int _tcp_setsockopt(int sock, int level, int option_name,
const void *option_value, socklen_t option_len);
static int _udp_setsockopt(int sock, int level, int option_name,
const void *option_value, socklen_t option_len);
static int _uds_setsockopt(int sock, int level, int option_name,
const void *option_value, socklen_t option_len);
/*
* Set socket options.
*/
static int
__setsockopt(int fd, int level, int option_name, const void * option_value,
socklen_t option_len)
{
message m;
memset(&m, 0, sizeof(m));
m.m_lc_vfs_sockopt.fd = fd;
m.m_lc_vfs_sockopt.level = level;
m.m_lc_vfs_sockopt.name = option_name;
m.m_lc_vfs_sockopt.buf = (vir_bytes)option_value;
m.m_lc_vfs_sockopt.len = option_len;
return _syscall(VFS_PROC_NR, VFS_SETSOCKOPT, &m);
}
int setsockopt(int sock, int level, int option_name,
const void *option_value, socklen_t option_len)
{
int r;
nwio_tcpopt_t tcpopt;
nwio_udpopt_t udpopt;
struct sockaddr_un uds_addr;
r = __setsockopt(sock, level, option_name, option_value, option_len);
if (r != -1 || (errno != ENOTSOCK && errno != ENOSYS))
return r;
r= ioctl(sock, NWIOGTCPOPT, &tcpopt);
if (r != -1 || errno != ENOTTY)
{
if (r == -1)
{
/* Bad file descriptor */
return -1;
}
return _tcp_setsockopt(sock, level, option_name,
option_value, option_len);
}
r= ioctl(sock, NWIOGUDPOPT, &udpopt);
if (r != -1 || errno != ENOTTY)
{
if (r == -1)
{
/* Bad file descriptor */
return -1;
}
return _udp_setsockopt(sock, level, option_name,
option_value, option_len);
}
r= ioctl(sock, NWIOGUDSADDR, &uds_addr);
if (r != -1 || errno != ENOTTY)
{
if (r == -1)
{
/* Bad file descriptor */
return -1;
}
return _uds_setsockopt(sock, level, option_name,
option_value, option_len);
}
errno = ENOTSOCK;
return -1;
}
static int _tcp_setsockopt(int sock, int level, int option_name,
const void *option_value, socklen_t option_len)
{
int i;
if (level == SOL_SOCKET && option_name == SO_REUSEADDR)
{
if (option_len != sizeof(i))
{
errno= EINVAL;
return -1;
}
i= *(const int *)option_value;
if (!i)
{
/* At the moment there is no way to turn off
* reusing addresses.
*/
errno= ENOSYS;
return -1;
}
return 0;
}
if (level == SOL_SOCKET && option_name == SO_KEEPALIVE)
{
if (option_len != sizeof(i))
{
errno= EINVAL;
return -1;
}
i= *(const int *)option_value;
if (!i)
{
/* At the moment there is no way to turn off
* keepalives.
*/
errno= ENOSYS;
return -1;
}
return 0;
}
if (level == SOL_SOCKET && option_name == SO_RCVBUF)
{
if (option_len != sizeof(i))
{
errno= EINVAL;
return -1;
}
i= *(const int *)option_value;
if (i > 32*1024)
{
/* The receive buffer is limited to 32K at the moment.
*/
errno= ENOSYS;
return -1;
}
/* There is no way to reduce the receive buffer, do we have to
* let this call fail for smaller buffers?
*/
return 0;
}
if (level == SOL_SOCKET && option_name == SO_SNDBUF)
{
if (option_len != sizeof(i))
{
errno= EINVAL;
return -1;
}
i= *(const int *)option_value;
if (i > 32*1024)
{
/* The send buffer is limited to 32K at the moment.
*/
errno= ENOSYS;
return -1;
}
/* There is no way to reduce the send buffer, do we have to
* let this call fail for smaller buffers?
*/
return 0;
}
if (level == IPPROTO_TCP && option_name == TCP_NODELAY)
{
if (option_len != sizeof(i))
{
errno= EINVAL;
return -1;
}
i= *(const int *)option_value;
if (i)
{
/* At the moment there is no way to turn on
* nodelay.
*/
errno= ENOSYS;
return -1;
}
return 0;
}
#if DEBUG
fprintf(stderr, "_tcp_setsocketopt: level %d, name %d\n",
level, option_name);
#endif
errno= ENOSYS;
return -1;
}
static int _udp_setsockopt(int sock, int level, int option_name,
const void *option_value, socklen_t option_len)
{
#if DEBUG
fprintf(stderr, "_udp_setsocketopt: level %d, name %d\n",
level, option_name);
#endif
errno= ENOSYS;
return -1;
}
static int _uds_setsockopt(int sock, int level, int option_name,
const void *option_value, socklen_t option_len)
{
int i;
size_t size;
if (level == SOL_SOCKET && option_name == SO_RCVBUF)
{
if (option_len != sizeof(size))
{
errno= EINVAL;
return -1;
}
size= *(const size_t *)option_value;
return ioctl(sock, NWIOSUDSRCVBUF, &size);
}
if (level == SOL_SOCKET && option_name == SO_SNDBUF)
{
if (option_len != sizeof(size))
{
errno= EINVAL;
return -1;
}
size= *(const size_t *)option_value;
return ioctl(sock, NWIOSUDSSNDBUF, &size);
}
if (level == SOL_SOCKET && option_name == SO_REUSEADDR)
{
if (option_len != sizeof(i))
{
errno= EINVAL;
return -1;
}
i= *(const int *)option_value;
if (!i)
{
/* At the moment there is no way to turn off
* reusing addresses.
*/
errno= ENOSYS;
return -1;
}
return 0;
}
#ifdef SO_PASSCRED
if (level == SOL_SOCKET && option_name == SO_PASSCRED)
{
if (option_len != sizeof(i))
{
errno= EINVAL;
return -1;
}
i= *(const int *)option_value;
if (!i)
{
/* credentials can always be received. */
errno= ENOSYS;
return -1;
}
return 0;
}
#endif
#if DEBUG
fprintf(stderr, "_uds_setsocketopt: level %d, name %d\n",
level, option_name);
#endif
errno= ENOSYS;
return -1;
}
|
