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
|
#include <sys/cdefs.h>
#include "namespace.h"
#include <lib.h>
#include <errno.h>
#include <stdio.h>
#include <string.h>
#include <sys/ioctl.h>
#include <sys/socket.h>
#include <netinet/in.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>
#include <sys/un.h>
static int _tcp_getpeername(int sock, struct sockaddr *__restrict address,
socklen_t *__restrict address_len, nwio_tcpconf_t *tcpconfp);
static int _udp_getpeername(int sock, struct sockaddr *__restrict address,
socklen_t *__restrict address_len, nwio_udpopt_t *tcpconfp);
static int _uds_getpeername(int sock, struct sockaddr *__restrict address,
socklen_t *__restrict address_len, struct sockaddr_un *uds_addr);
/*
* Get the remote address of a socket.
*/
static int
__getpeername(int fd, struct sockaddr * __restrict address,
socklen_t * __restrict address_len)
{
message m;
if (address_len == NULL) {
errno = EFAULT;
return -1;
}
memset(&m, 0, sizeof(m));
m.m_lc_vfs_sockaddr.fd = fd;
m.m_lc_vfs_sockaddr.addr = (vir_bytes)address;
m.m_lc_vfs_sockaddr.addr_len = *address_len;
if (_syscall(VFS_PROC_NR, VFS_GETPEERNAME, &m) < 0)
return -1;
*address_len = m.m_vfs_lc_socklen.len;
return 0;
}
int getpeername(int sock, struct sockaddr *__restrict address,
socklen_t *__restrict address_len)
{
int r;
nwio_tcpconf_t tcpconf;
nwio_udpopt_t udpopt;
struct sockaddr_un uds_addr;
r = __getpeername(sock, address, address_len);
if (r != -1 || (errno != ENOTSOCK && errno != ENOSYS))
return r;
r= ioctl(sock, NWIOGTCPCONF, &tcpconf);
if (r != -1 || errno != ENOTTY)
{
if (r == -1)
{
/* Bad file descriptor */
return -1;
}
return _tcp_getpeername(sock, address, address_len,
&tcpconf);
}
r= ioctl(sock, NWIOGUDPOPT, &udpopt);
if (r != -1 || errno != ENOTTY)
{
if (r == -1)
{
/* Bad file descriptor */
return -1;
}
return _udp_getpeername(sock, address, address_len,
&udpopt);
}
r= ioctl(sock, NWIOGUDSPADDR, &uds_addr);
if (r != -1 || errno != ENOTTY)
{
if (r == -1)
{
/* Bad file descriptor */
return -1;
}
return _uds_getpeername(sock, address, address_len,
&uds_addr);
}
errno = ENOTSOCK;
return -1;
}
static int _tcp_getpeername(int sock, struct sockaddr *__restrict address,
socklen_t *__restrict address_len, nwio_tcpconf_t *tcpconfp)
{
socklen_t len;
struct sockaddr_in sin;
if (tcpconfp->nwtc_remaddr == 0 ||
tcpconfp->nwtc_remport == 0)
{
errno= ENOTCONN;
return -1;
}
memset(&sin, '\0', sizeof(sin));
sin.sin_family= AF_INET;
sin.sin_addr.s_addr= tcpconfp->nwtc_remaddr;
sin.sin_port= tcpconfp->nwtc_remport;
sin.sin_len = sizeof(sin);
len= *address_len;
if (len > sizeof(sin))
len= sizeof(sin);
memcpy(address, &sin, len);
*address_len= len;
return 0;
}
static int _udp_getpeername(int sock, struct sockaddr *__restrict address,
socklen_t *__restrict address_len, nwio_udpopt_t *udpopt)
{
socklen_t len;
struct sockaddr_in sin;
if (udpopt->nwuo_remaddr == 0 ||
udpopt->nwuo_remport == 0)
{
errno= ENOTCONN;
return -1;
}
memset(&sin, '\0', sizeof(sin));
sin.sin_family= AF_INET;
sin.sin_addr.s_addr= udpopt->nwuo_remaddr;
sin.sin_port= udpopt->nwuo_remport;
sin.sin_len = sizeof(sin);
len= *address_len;
if (len > sizeof(sin))
len= sizeof(sin);
memcpy(address, &sin, len);
*address_len= len;
return 0;
}
static int _uds_getpeername(int sock, struct sockaddr *__restrict address,
socklen_t *__restrict address_len, struct sockaddr_un *uds_addr)
{
socklen_t len;
if (uds_addr->sun_family != AF_UNIX)
{
errno= ENOTCONN;
return -1;
}
len= *address_len;
if (len > sizeof(struct sockaddr_un))
len = sizeof(struct sockaddr_un);
memcpy(address, uds_addr, len);
*address_len= len;
return 0;
}
|
