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 #pragma ident "%Z%%M% %I% %E% SMI"
41
42 #include <sys/types.h>
43 #include <sys/socket.h>
44 #include <sys/stropts.h>
45 #include <sys/stream.h>
46 #include <sys/socketvar.h>
47 #include <errno.h>
48 #include <unistd.h>
49 #include <stdlib.h>
50
51 extern int _socket_create(int, int, int, int);
52 extern int _so_socketpair(int*);
53
54 int _socketpair_create(int, int, int, int*, int);
55
56 #pragma weak socketpair = _socketpair
57
58 int
_socketpair(int family,int type,int protocol,int sv[2])59 _socketpair(int family, int type, int protocol, int sv[2])
60 {
61 return (_socketpair_create(family, type, protocol, sv, SOV_DEFAULT));
62 }
63
64 /*
65 * Used by the BCP library.
66 */
67 int
_socketpair_bsd(int family,int type,int protocol,int sv[2])68 _socketpair_bsd(int family, int type, int protocol, int sv[2])
69 {
70 return (_socketpair_create(family, type, protocol, sv, SOV_SOCKBSD));
71 }
72
73 int
_socketpair_svr4(int family,int type,int protocol,int sv[2])74 _socketpair_svr4(int family, int type, int protocol, int sv[2])
75 {
76 return (_socketpair_create(family, type, protocol, sv,
77 SOV_SOCKSTREAM));
78 }
79
80 int
__xnet_socketpair(int family,int type,int protocol,int sv[2])81 __xnet_socketpair(int family, int type, int protocol, int sv[2])
82 {
83 return (_socketpair_create(family, type, protocol, sv,
84 SOV_XPG4_2));
85 }
86
87 int
_socketpair_create(int family,int type,int protocol,int sv[2],int version)88 _socketpair_create(int family, int type, int protocol, int sv[2], int version)
89 {
90 int res;
91 int fd1, fd2;
92
93 /*
94 * Create the two sockets and pass them to _so_socketpair, which
95 * will connect them together.
96 */
97 fd1 = _socket_create(family, type, protocol, version);
98 if (fd1 < 0)
99 return (-1);
100 fd2 = _socket_create(family, type, protocol, version);
101 if (fd2 < 0) {
102 int error = errno;
103
104 (void) close(fd1);
105 errno = error;
106 return (-1);
107 }
108 sv[0] = fd1;
109 sv[1] = fd2;
110 res = _so_socketpair(sv);
111 if (res < 0) {
112 int error = errno;
113
114 (void) close(fd1);
115 (void) close(fd2);
116 errno = error;
117 return (-1);
118 }
119 /*
120 * Check if kernel returned different fds in which case we close
121 * the original ones. This is the case for SOCK_STREAM where
122 * one of the original sockets is used as a listener and
123 * _so_socketpair passes out the newly accepted socket.
124 */
125 if (sv[0] != fd1)
126 (void) close(fd1);
127 if (sv[1] != fd2)
128 (void) close(fd2);
129 return (res);
130 }
131