1*0Sstevel@tonic-gate /*
2*0Sstevel@tonic-gate  * CDDL HEADER START
3*0Sstevel@tonic-gate  *
4*0Sstevel@tonic-gate  * The contents of this file are subject to the terms of the
5*0Sstevel@tonic-gate  * Common Development and Distribution License, Version 1.0 only
6*0Sstevel@tonic-gate  * (the "License").  You may not use this file except in compliance
7*0Sstevel@tonic-gate  * with the License.
8*0Sstevel@tonic-gate  *
9*0Sstevel@tonic-gate  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10*0Sstevel@tonic-gate  * or http://www.opensolaris.org/os/licensing.
11*0Sstevel@tonic-gate  * See the License for the specific language governing permissions
12*0Sstevel@tonic-gate  * and limitations under the License.
13*0Sstevel@tonic-gate  *
14*0Sstevel@tonic-gate  * When distributing Covered Code, include this CDDL HEADER in each
15*0Sstevel@tonic-gate  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16*0Sstevel@tonic-gate  * If applicable, add the following below this CDDL HEADER, with the
17*0Sstevel@tonic-gate  * fields enclosed by brackets "[]" replaced with your own identifying
18*0Sstevel@tonic-gate  * information: Portions Copyright [yyyy] [name of copyright owner]
19*0Sstevel@tonic-gate  *
20*0Sstevel@tonic-gate  * CDDL HEADER END
21*0Sstevel@tonic-gate  */
22*0Sstevel@tonic-gate /*
23*0Sstevel@tonic-gate  * Copyright 1997 Sun Microsystems, Inc.  All rights reserved.
24*0Sstevel@tonic-gate  * Use is subject to license terms.
25*0Sstevel@tonic-gate  */
26*0Sstevel@tonic-gate 
27*0Sstevel@tonic-gate /*	Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
28*0Sstevel@tonic-gate /*	  All Rights Reserved   */
29*0Sstevel@tonic-gate 
30*0Sstevel@tonic-gate /*
31*0Sstevel@tonic-gate  * University Copyright- Copyright (c) 1982, 1986, 1988
32*0Sstevel@tonic-gate  * The Regents of the University of California
33*0Sstevel@tonic-gate  * All Rights Reserved
34*0Sstevel@tonic-gate  *
35*0Sstevel@tonic-gate  * University Acknowledgment- Portions of this document are derived from
36*0Sstevel@tonic-gate  * software developed by the University of California, Berkeley, and its
37*0Sstevel@tonic-gate  * contributors.
38*0Sstevel@tonic-gate  */
39*0Sstevel@tonic-gate 
40*0Sstevel@tonic-gate #pragma ident	"%Z%%M%	%I%	%E% SMI"
41*0Sstevel@tonic-gate 
42*0Sstevel@tonic-gate #include <sys/types.h>
43*0Sstevel@tonic-gate #include <sys/socket.h>
44*0Sstevel@tonic-gate #include <sys/stropts.h>
45*0Sstevel@tonic-gate #include <sys/stream.h>
46*0Sstevel@tonic-gate #include <sys/socketvar.h>
47*0Sstevel@tonic-gate #include <errno.h>
48*0Sstevel@tonic-gate #include <unistd.h>
49*0Sstevel@tonic-gate #include <stdlib.h>
50*0Sstevel@tonic-gate 
51*0Sstevel@tonic-gate extern int _so_socket();
52*0Sstevel@tonic-gate extern int _s_netconfig_path();
53*0Sstevel@tonic-gate extern int _setsockopt();
54*0Sstevel@tonic-gate 
55*0Sstevel@tonic-gate int _socket_create(int, int, int, int);
56*0Sstevel@tonic-gate 
57*0Sstevel@tonic-gate #pragma weak socket = _socket
58*0Sstevel@tonic-gate 
59*0Sstevel@tonic-gate int
60*0Sstevel@tonic-gate _socket(int family, int type, int protocol)
61*0Sstevel@tonic-gate {
62*0Sstevel@tonic-gate 	return (_socket_create(family, type, protocol, SOV_DEFAULT));
63*0Sstevel@tonic-gate }
64*0Sstevel@tonic-gate 
65*0Sstevel@tonic-gate /*
66*0Sstevel@tonic-gate  * Used by the BCP library.
67*0Sstevel@tonic-gate  */
68*0Sstevel@tonic-gate int
69*0Sstevel@tonic-gate _socket_bsd(int family, int type, int protocol)
70*0Sstevel@tonic-gate {
71*0Sstevel@tonic-gate 	return (_socket_create(family, type, protocol, SOV_SOCKBSD));
72*0Sstevel@tonic-gate }
73*0Sstevel@tonic-gate 
74*0Sstevel@tonic-gate int
75*0Sstevel@tonic-gate _socket_svr4(int family, int type, int protocol)
76*0Sstevel@tonic-gate {
77*0Sstevel@tonic-gate 	return (_socket_create(family, type, protocol, SOV_SOCKSTREAM));
78*0Sstevel@tonic-gate }
79*0Sstevel@tonic-gate 
80*0Sstevel@tonic-gate int
81*0Sstevel@tonic-gate __xnet_socket(int family, int type, int protocol)
82*0Sstevel@tonic-gate {
83*0Sstevel@tonic-gate 	return (_socket_create(family, type, protocol, SOV_XPG4_2));
84*0Sstevel@tonic-gate }
85*0Sstevel@tonic-gate 
86*0Sstevel@tonic-gate /*
87*0Sstevel@tonic-gate  * Create a socket endpoint for socket() and socketpair().
88*0Sstevel@tonic-gate  * In SunOS 4.X and in SunOS 5.X prior to XPG 4.2 the only error
89*0Sstevel@tonic-gate  * that could be returned due to invalid <family, type, protocol>
90*0Sstevel@tonic-gate  * was EPROTONOSUPPORT. (While the SunOS 4.X source contains EPROTOTYPE
91*0Sstevel@tonic-gate  * error as well that error can only be generated if the kernel is
92*0Sstevel@tonic-gate  * incorrectly configured.)
93*0Sstevel@tonic-gate  * For backwards compatibility only applications that request XPG 4.2
94*0Sstevel@tonic-gate  * (through c89 or XOPEN_SOURCE) will get EPROTOTYPE or EAFNOSUPPORT errors.
95*0Sstevel@tonic-gate  */
96*0Sstevel@tonic-gate int
97*0Sstevel@tonic-gate _socket_create(int family, int type, int protocol, int version)
98*0Sstevel@tonic-gate {
99*0Sstevel@tonic-gate 	int fd;
100*0Sstevel@tonic-gate 
101*0Sstevel@tonic-gate 	/*
102*0Sstevel@tonic-gate 	 * Try creating without knowing the device assuming that
103*0Sstevel@tonic-gate 	 * the transport provider is registered in /etc/sock2path.
104*0Sstevel@tonic-gate 	 * If none found fall back to using /etc/netconfig to look
105*0Sstevel@tonic-gate 	 * up the name of the transport device name. This provides
106*0Sstevel@tonic-gate 	 * backwards compatibility for transport providers that have not
107*0Sstevel@tonic-gate 	 * yet been converted to using /etc/sock2path.
108*0Sstevel@tonic-gate 	 * XXX When all transport providers use /etc/sock2path this
109*0Sstevel@tonic-gate 	 * part of the code can be removed.
110*0Sstevel@tonic-gate 	 */
111*0Sstevel@tonic-gate 	fd = _so_socket(family, type, protocol, NULL, version);
112*0Sstevel@tonic-gate 	if (fd == -1) {
113*0Sstevel@tonic-gate 		char *devpath;
114*0Sstevel@tonic-gate 		int saved_errno = errno;
115*0Sstevel@tonic-gate 		int prototype = 0;
116*0Sstevel@tonic-gate 
117*0Sstevel@tonic-gate 		switch (saved_errno) {
118*0Sstevel@tonic-gate 		case EAFNOSUPPORT:
119*0Sstevel@tonic-gate 		case EPROTOTYPE:
120*0Sstevel@tonic-gate 			if (version != SOV_XPG4_2)
121*0Sstevel@tonic-gate 				saved_errno = EPROTONOSUPPORT;
122*0Sstevel@tonic-gate 			break;
123*0Sstevel@tonic-gate 		case EPROTONOSUPPORT:
124*0Sstevel@tonic-gate 			break;
125*0Sstevel@tonic-gate 
126*0Sstevel@tonic-gate 		default:
127*0Sstevel@tonic-gate 			errno = saved_errno;
128*0Sstevel@tonic-gate 			return (-1);
129*0Sstevel@tonic-gate 		}
130*0Sstevel@tonic-gate 		if (_s_netconfig_path(family, type, protocol,
131*0Sstevel@tonic-gate 					&devpath, &prototype) == -1) {
132*0Sstevel@tonic-gate 			errno = saved_errno;
133*0Sstevel@tonic-gate 			return (-1);
134*0Sstevel@tonic-gate 		}
135*0Sstevel@tonic-gate 		fd = _so_socket(family, type, protocol, devpath, version);
136*0Sstevel@tonic-gate 		free(devpath);
137*0Sstevel@tonic-gate 		if (fd == -1) {
138*0Sstevel@tonic-gate 			errno = saved_errno;
139*0Sstevel@tonic-gate 			return (-1);
140*0Sstevel@tonic-gate 		}
141*0Sstevel@tonic-gate 		if (prototype != 0) {
142*0Sstevel@tonic-gate 			if (_setsockopt(fd, SOL_SOCKET, SO_PROTOTYPE,
143*0Sstevel@tonic-gate 			    (caddr_t)&prototype, (int)sizeof (prototype)) < 0) {
144*0Sstevel@tonic-gate 				(void) close(fd);
145*0Sstevel@tonic-gate 				/*
146*0Sstevel@tonic-gate 				 * setsockopt often fails with ENOPROTOOPT
147*0Sstevel@tonic-gate 				 * but socket() should fail with
148*0Sstevel@tonic-gate 				 * EPROTONOSUPPORT.
149*0Sstevel@tonic-gate 				 */
150*0Sstevel@tonic-gate 				errno = EPROTONOSUPPORT;
151*0Sstevel@tonic-gate 				return (-1);
152*0Sstevel@tonic-gate 			}
153*0Sstevel@tonic-gate 		}
154*0Sstevel@tonic-gate 	}
155*0Sstevel@tonic-gate 	return (fd);
156*0Sstevel@tonic-gate }
157