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
|
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 1997 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
/* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
/* All Rights Reserved */
/*
* University Copyright- Copyright (c) 1982, 1986, 1988
* The Regents of the University of California
* All Rights Reserved
*
* University Acknowledgment- Portions of this document are derived from
* software developed by the University of California, Berkeley, and its
* contributors.
*/
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/stropts.h>
#include <sys/stream.h>
#include <sys/socketvar.h>
#include <errno.h>
#include <unistd.h>
#include <stdlib.h>
extern int _socket_create(int, int, int, int);
extern int _so_socketpair(int *);
int _socketpair_create(int, int, int, int [2], int);
#pragma weak socketpair = _socketpair
int
_socketpair(int family, int type, int protocol, int sv[2])
{
return (_socketpair_create(family, type, protocol, sv, SOV_DEFAULT));
}
/*
* Used by the BCP library.
*/
int
_socketpair_bsd(int family, int type, int protocol, int sv[2])
{
return (_socketpair_create(family, type, protocol, sv, SOV_SOCKBSD));
}
int
_socketpair_svr4(int family, int type, int protocol, int sv[2])
{
return (_socketpair_create(family, type, protocol, sv, SOV_SOCKSTREAM));
}
int
__xnet_socketpair(int family, int type, int protocol, int sv[2])
{
return (_socketpair_create(family, type, protocol, sv, SOV_XPG4_2));
}
int
_socketpair_create(int family, int type, int protocol, int sv[2], int version)
{
int res;
int fd1, fd2;
/*
* Create the two sockets and pass them to _so_socketpair, which
* will connect them together.
*/
fd1 = _socket_create(family, type, protocol, version);
if (fd1 < 0)
return (-1);
fd2 = _socket_create(family, type, protocol, version);
if (fd2 < 0) {
int error = errno;
(void) close(fd1);
errno = error;
return (-1);
}
sv[0] = fd1;
sv[1] = fd2;
res = _so_socketpair(sv);
if (res < 0) {
int error = errno;
(void) close(fd1);
(void) close(fd2);
errno = error;
return (-1);
}
/*
* Check if kernel returned different fds in which case we close
* the original ones. This is the case for SOCK_STREAM where
* one of the original sockets is used as a listener and
* _so_socketpair passes out the newly accepted socket.
*/
if (sv[0] != fd1)
(void) close(fd1);
if (sv[1] != fd2)
(void) close(fd2);
return (res);
}
|