source: trunk/minix/lib/ip/getsockopt.c@ 12

Last change on this file since 12 was 9, checked in by Mattia Monga, 14 years ago

Minix 3.1.2a
File size: 3.2 KB
RevLine 
[9]1#include <assert.h>
2#include <errno.h>
3#include <stdio.h>
4#include <string.h>
5#include <sys/ioctl.h>
6#include <sys/socket.h>
7#include <sys/types.h>
8#include <netinet/tcp.h>
9
10#include <net/gen/in.h>
11#include <net/gen/tcp.h>
12#include <net/gen/tcp_io.h>
13#include <net/gen/udp.h>
14#include <net/gen/udp_io.h>
15
16#define DEBUG 0
17
18static int _tcp_getsockopt(int socket, int level, int option_name,
19 void *_RESTRICT option_value, socklen_t *_RESTRICT option_len);
20static int _udp_getsockopt(int socket, int level, int option_name,
21 void *_RESTRICT option_value, socklen_t *_RESTRICT option_len);
22
23int getsockopt(int socket, int level, int option_name,
24 void *_RESTRICT option_value, socklen_t *_RESTRICT 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_getsockopt(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_getsockopt(socket, level, option_name,
51 option_value, option_len);
52 }
53
54#if DEBUG
55 fprintf(stderr, "getsockopt: not implemented for fd %d\n", socket);
56#endif
57 errno= ENOTSOCK;
58 return -1;
59}
60
61static int _tcp_getsockopt(int socket, int level, int option_name,
62 void *_RESTRICT option_value, socklen_t *_RESTRICT option_len)
63{
64 int i, r, err;
65
66 if (level == SOL_SOCKET && option_name == SO_KEEPALIVE)
67 {
68 i= 1; /* Keepalive is always on */
69 if (*option_len < sizeof(i))
70 memcpy(option_value, &i, *option_len);
71 else
72 memcpy(option_value, &i, sizeof(i));
73 *option_len= sizeof(i);
74 return 0;
75 }
76 if (level == SOL_SOCKET && option_name == SO_ERROR)
77 {
78 r= ioctl(socket, NWIOTCPGERROR, &err);
79 if (r != 0)
80 return r;
81 if (*option_len < sizeof(err))
82 memcpy(option_value, &err, *option_len);
83 else
84 memcpy(option_value, &err, sizeof(err));
85 *option_len= sizeof(err);
86 return 0;
87 }
88 if (level == SOL_SOCKET && option_name == SO_RCVBUF)
89 {
90 i= 32*1024; /* Receive buffer in the current
91 * implementation
92 */
93 if (*option_len < sizeof(i))
94 memcpy(option_value, &i, *option_len);
95 else
96 memcpy(option_value, &i, sizeof(i));
97 *option_len= sizeof(i);
98 return 0;
99 }
100 if (level == SOL_SOCKET && option_name == SO_SNDBUF)
101 {
102 i= 32*1024; /* Send buffer in the current implementation */
103 if (*option_len < sizeof(i))
104 memcpy(option_value, &i, *option_len);
105 else
106 memcpy(option_value, &i, sizeof(i));
107 *option_len= sizeof(i);
108 return 0;
109 }
110 if (level == IPPROTO_TCP && option_name == TCP_NODELAY)
111 {
112 i= 0; /* nodelay is always off */
113 if (*option_len < sizeof(i))
114 memcpy(option_value, &i, *option_len);
115 else
116 memcpy(option_value, &i, sizeof(i));
117 *option_len= sizeof(i);
118 return 0;
119 }
120#if DEBUG
121 fprintf(stderr, "_tcp_getsocketopt: level %d, name %d\n",
122 level, option_name);
123#endif
124
125 errno= ENOPROTOOPT;
126 return -1;
127}
128
129static int _udp_getsockopt(int socket, int level, int option_name,
130 void *_RESTRICT option_value, socklen_t *_RESTRICT option_len)
131{
132 int i;
133
134#if DEBUG
135 fprintf(stderr, "_udp_getsocketopt: level %d, name %d\n",
136 level, option_name);
137#endif
138
139 errno= ENOSYS;
140 return -1;
141}
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