source: trunk/minix/lib/ip/setsockopt.c@ 9

Last change on this file since 9 was 9, checked in by Mattia Monga, 14 years ago

Minix 3.1.2a
File size: 3.1 KB
Line 
1#include <assert.h>
2#include <errno.h>
3#include <stdio.h>
4#include <sys/ioctl.h>
5#include <sys/socket.h>
6#include <sys/types.h>
7#include <netinet/tcp.h>
8
9#include <net/gen/in.h>
10#include <net/gen/tcp.h>
11#include <net/gen/tcp_io.h>
12#include <net/gen/udp.h>
13#include <net/gen/udp_io.h>
14
15#define DEBUG 0
16
17static int _tcp_setsockopt(int socket, int level, int option_name,
18 const void *option_value, socklen_t option_len);
19
20static int _udp_setsockopt(int socket, int level, int option_name,
21 const void *option_value, socklen_t option_len);
22
23int setsockopt(int socket, int level, int option_name,
24 const void *option_value, socklen_t option_len)
25{
26 int r;
27 nwio_tcpopt_t tcpopt;
28 nwio_udpopt_t udpopt;
29
30 r= ioctl(socket, NWIOGTCPOPT, &tcpopt);
31 if (r != -1 || errno != ENOTTY)
32 {
33 if (r == -1)
34 {
35 /* Bad file descriptor */
36 return -1;
37 }
38 return _tcp_setsockopt(socket, level, option_name,
39 option_value, option_len);
40 }
41
42 r= ioctl(socket, NWIOGUDPOPT, &udpopt);
43 if (r != -1 || errno != ENOTTY)
44 {
45 if (r == -1)
46 {
47 /* Bad file descriptor */
48 return -1;
49 }
50 return _udp_setsockopt(socket, level, option_name,
51 option_value, option_len);
52 }
53
54#if DEBUG
55 fprintf(stderr, "setsockopt: not implemented for fd %d\n", socket);
56#endif
57 errno= ENOTSOCK;
58 return -1;
59}
60
61static int _tcp_setsockopt(int socket, int level, int option_name,
62 const void *option_value, socklen_t option_len)
63{
64 int i;
65
66 if (level == SOL_SOCKET && option_name == SO_KEEPALIVE)
67 {
68 if (option_len != sizeof(i))
69 {
70 errno= EINVAL;
71 return -1;
72 }
73 i= *(int *)option_value;
74 if (!i)
75 {
76 /* At the moment there is no way to turn off
77 * keepalives.
78 */
79 errno= ENOSYS;
80 return -1;
81 }
82 return 0;
83 }
84 if (level == SOL_SOCKET && option_name == SO_RCVBUF)
85 {
86 if (option_len != sizeof(i))
87 {
88 errno= EINVAL;
89 return -1;
90 }
91 i= *(int *)option_value;
92 if (i > 32*1024)
93 {
94 /* The receive buffer is limited to 32K at the moment.
95 */
96 errno= ENOSYS;
97 return -1;
98 }
99 /* There is no way to reduce the receive buffer, do we have to
100 * let this call fail for smaller buffers?
101 */
102 return 0;
103 }
104 if (level == SOL_SOCKET && option_name == SO_SNDBUF)
105 {
106 if (option_len != sizeof(i))
107 {
108 errno= EINVAL;
109 return -1;
110 }
111 i= *(int *)option_value;
112 if (i > 32*1024)
113 {
114 /* The send buffer is limited to 32K at the moment.
115 */
116 errno= ENOSYS;
117 return -1;
118 }
119 /* There is no way to reduce the send buffer, do we have to
120 * let this call fail for smaller buffers?
121 */
122 return 0;
123 }
124 if (level == IPPROTO_TCP && option_name == TCP_NODELAY)
125 {
126 if (option_len != sizeof(i))
127 {
128 errno= EINVAL;
129 return -1;
130 }
131 i= *(int *)option_value;
132 if (i)
133 {
134 /* At the moment there is no way to turn on
135 * nodelay.
136 */
137 errno= ENOSYS;
138 return -1;
139 }
140 return 0;
141 }
142#if DEBUG
143 fprintf(stderr, "_tcp_setsocketopt: level %d, name %d\n",
144 level, option_name);
145#endif
146
147 errno= ENOSYS;
148 return -1;
149}
150
151static int _udp_setsockopt(int socket, int level, int option_name,
152 const void *option_value, socklen_t option_len)
153{
154 int i;
155
156#if DEBUG
157 fprintf(stderr, "_udp_setsocketopt: level %d, name %d\n",
158 level, option_name);
159#endif
160
161 errno= ENOSYS;
162 return -1;
163}
164
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