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 _so_socket(); 52 extern int _s_netconfig_path(); 53 extern int _setsockopt(); 54 55 int _socket_create(int, int, int, int); 56 57 #pragma weak socket = _socket 58 59 int 60 _socket(int family, int type, int protocol) 61 { 62 return (_socket_create(family, type, protocol, SOV_DEFAULT)); 63 } 64 65 /* 66 * Used by the BCP library. 67 */ 68 int 69 _socket_bsd(int family, int type, int protocol) 70 { 71 return (_socket_create(family, type, protocol, SOV_SOCKBSD)); 72 } 73 74 int 75 _socket_svr4(int family, int type, int protocol) 76 { 77 return (_socket_create(family, type, protocol, SOV_SOCKSTREAM)); 78 } 79 80 int 81 __xnet_socket(int family, int type, int protocol) 82 { 83 return (_socket_create(family, type, protocol, SOV_XPG4_2)); 84 } 85 86 /* 87 * Create a socket endpoint for socket() and socketpair(). 88 * In SunOS 4.X and in SunOS 5.X prior to XPG 4.2 the only error 89 * that could be returned due to invalid <family, type, protocol> 90 * was EPROTONOSUPPORT. (While the SunOS 4.X source contains EPROTOTYPE 91 * error as well that error can only be generated if the kernel is 92 * incorrectly configured.) 93 * For backwards compatibility only applications that request XPG 4.2 94 * (through c89 or XOPEN_SOURCE) will get EPROTOTYPE or EAFNOSUPPORT errors. 95 */ 96 int 97 _socket_create(int family, int type, int protocol, int version) 98 { 99 int fd; 100 101 /* 102 * Try creating without knowing the device assuming that 103 * the transport provider is registered in /etc/sock2path. 104 * If none found fall back to using /etc/netconfig to look 105 * up the name of the transport device name. This provides 106 * backwards compatibility for transport providers that have not 107 * yet been converted to using /etc/sock2path. 108 * XXX When all transport providers use /etc/sock2path this 109 * part of the code can be removed. 110 */ 111 fd = _so_socket(family, type, protocol, NULL, version); 112 if (fd == -1) { 113 char *devpath; 114 int saved_errno = errno; 115 int prototype = 0; 116 117 switch (saved_errno) { 118 case EAFNOSUPPORT: 119 case EPROTOTYPE: 120 if (version != SOV_XPG4_2) 121 saved_errno = EPROTONOSUPPORT; 122 break; 123 case EPROTONOSUPPORT: 124 break; 125 126 default: 127 errno = saved_errno; 128 return (-1); 129 } 130 if (_s_netconfig_path(family, type, protocol, 131 &devpath, &prototype) == -1) { 132 errno = saved_errno; 133 return (-1); 134 } 135 fd = _so_socket(family, type, protocol, devpath, version); 136 free(devpath); 137 if (fd == -1) { 138 errno = saved_errno; 139 return (-1); 140 } 141 if (prototype != 0) { 142 if (_setsockopt(fd, SOL_SOCKET, SO_PROTOTYPE, 143 (caddr_t)&prototype, (int)sizeof (prototype)) < 0) { 144 (void) close(fd); 145 /* 146 * setsockopt often fails with ENOPROTOOPT 147 * but socket() should fail with 148 * EPROTONOSUPPORT. 149 */ 150 errno = EPROTONOSUPPORT; 151 return (-1); 152 } 153 } 154 } 155 return (fd); 156 } 157