1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License, Version 1.0 only
6 * (the "License"). You may not use this file except in compliance
7 * with the License.
8 *
9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10 * or http://www.opensolaris.org/os/licensing.
11 * See the License for the specific language governing permissions
12 * and limitations under the License.
13 *
14 * When distributing Covered Code, include this CDDL HEADER in each
15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16 * If applicable, add the following below this CDDL HEADER, with the
17 * fields enclosed by brackets "[]" replaced with your own identifying
18 * information: Portions Copyright [yyyy] [name of copyright owner]
19 *
20 * CDDL HEADER END
21 */
22 /*
23 * Copyright 1997 Sun Microsystems, Inc. All rights reserved.
24 * Use is subject to license terms.
25 */
26
27 /* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
28 /* All Rights Reserved */
29
30 /*
31 * University Copyright- Copyright (c) 1982, 1986, 1988
32 * The Regents of the University of California
33 * All Rights Reserved
34 *
35 * University Acknowledgment- Portions of this document are derived from
36 * software developed by the University of California, Berkeley, and its
37 * contributors.
38 */
39
40 #include <sys/types.h>
41 #include <sys/socket.h>
42 #include <sys/stropts.h>
43 #include <sys/stream.h>
44 #include <sys/socketvar.h>
45 #include <errno.h>
46 #include <unistd.h>
47 #include <stdlib.h>
48
49 extern int _socket_create(int, int, int, int);
50 extern int _so_socketpair(int *);
51
52 int _socketpair_create(int, int, int, int [2], int);
53
54 #pragma weak socketpair = _socketpair
55
56 int
_socketpair(int family,int type,int protocol,int sv[2])57 _socketpair(int family, int type, int protocol, int sv[2])
58 {
59 return (_socketpair_create(family, type, protocol, sv, SOV_DEFAULT));
60 }
61
62 /*
63 * Used by the BCP library.
64 */
65 int
_socketpair_bsd(int family,int type,int protocol,int sv[2])66 _socketpair_bsd(int family, int type, int protocol, int sv[2])
67 {
68 return (_socketpair_create(family, type, protocol, sv, SOV_SOCKBSD));
69 }
70
71 int
_socketpair_svr4(int family,int type,int protocol,int sv[2])72 _socketpair_svr4(int family, int type, int protocol, int sv[2])
73 {
74 return (_socketpair_create(family, type, protocol, sv, SOV_SOCKSTREAM));
75 }
76
77 int
__xnet_socketpair(int family,int type,int protocol,int sv[2])78 __xnet_socketpair(int family, int type, int protocol, int sv[2])
79 {
80 return (_socketpair_create(family, type, protocol, sv, SOV_XPG4_2));
81 }
82
83 int
_socketpair_create(int family,int type,int protocol,int sv[2],int version)84 _socketpair_create(int family, int type, int protocol, int sv[2], int version)
85 {
86 int res;
87 int fd1, fd2;
88
89 /*
90 * Create the two sockets and pass them to _so_socketpair, which
91 * will connect them together.
92 */
93 fd1 = _socket_create(family, type, protocol, version);
94 if (fd1 < 0)
95 return (-1);
96 fd2 = _socket_create(family, type, protocol, version);
97 if (fd2 < 0) {
98 int error = errno;
99
100 (void) close(fd1);
101 errno = error;
102 return (-1);
103 }
104 sv[0] = fd1;
105 sv[1] = fd2;
106 res = _so_socketpair(sv);
107 if (res < 0) {
108 int error = errno;
109
110 (void) close(fd1);
111 (void) close(fd2);
112 errno = error;
113 return (-1);
114 }
115 /*
116 * Check if kernel returned different fds in which case we close
117 * the original ones. This is the case for SOCK_STREAM where
118 * one of the original sockets is used as a listener and
119 * _so_socketpair passes out the newly accepted socket.
120 */
121 if (sv[0] != fd1)
122 (void) close(fd1);
123 if (sv[1] != fd2)
124 (void) close(fd2);
125 return (res);
126 }
127