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 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 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 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 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 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