17c478bd9Sstevel@tonic-gate /*
27c478bd9Sstevel@tonic-gate  * CDDL HEADER START
37c478bd9Sstevel@tonic-gate  *
47c478bd9Sstevel@tonic-gate  * The contents of this file are subject to the terms of the
57257d1b4Sraf  * Common Development and Distribution License (the "License").
67257d1b4Sraf  * You may not use this file except in compliance with the License.
77c478bd9Sstevel@tonic-gate  *
87c478bd9Sstevel@tonic-gate  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
97c478bd9Sstevel@tonic-gate  * or http://www.opensolaris.org/os/licensing.
107c478bd9Sstevel@tonic-gate  * See the License for the specific language governing permissions
117c478bd9Sstevel@tonic-gate  * and limitations under the License.
127c478bd9Sstevel@tonic-gate  *
137c478bd9Sstevel@tonic-gate  * When distributing Covered Code, include this CDDL HEADER in each
147c478bd9Sstevel@tonic-gate  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
157c478bd9Sstevel@tonic-gate  * If applicable, add the following below this CDDL HEADER, with the
167c478bd9Sstevel@tonic-gate  * fields enclosed by brackets "[]" replaced with your own identifying
177c478bd9Sstevel@tonic-gate  * information: Portions Copyright [yyyy] [name of copyright owner]
187c478bd9Sstevel@tonic-gate  *
197c478bd9Sstevel@tonic-gate  * CDDL HEADER END
207c478bd9Sstevel@tonic-gate  */
217257d1b4Sraf 
227c478bd9Sstevel@tonic-gate /*
23*d2b5b2d3SAnders Persson  * Copyright (c) 1995, 2010, Oracle and/or its affiliates. All rights reserved.
247c478bd9Sstevel@tonic-gate  */
257c478bd9Sstevel@tonic-gate 
267c478bd9Sstevel@tonic-gate /*	Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T */
277c478bd9Sstevel@tonic-gate /*	  All Rights Reserved   */
287c478bd9Sstevel@tonic-gate 
297c478bd9Sstevel@tonic-gate /*
307c478bd9Sstevel@tonic-gate  * Portions of this source code were derived from Berkeley 4.3 BSD
317c478bd9Sstevel@tonic-gate  * under license from the Regents of the University of California.
327c478bd9Sstevel@tonic-gate  */
337c478bd9Sstevel@tonic-gate 
347c478bd9Sstevel@tonic-gate #include <sys/types.h>
357c478bd9Sstevel@tonic-gate #include <sys/socket.h>
367c478bd9Sstevel@tonic-gate #include <sys/stat.h>
377c478bd9Sstevel@tonic-gate #include <netinet/in.h>
387c478bd9Sstevel@tonic-gate #include <errno.h>
397c478bd9Sstevel@tonic-gate #include <unistd.h>
407c478bd9Sstevel@tonic-gate #include <stdlib.h>
417c478bd9Sstevel@tonic-gate #include <string.h>
427c478bd9Sstevel@tonic-gate 
437c478bd9Sstevel@tonic-gate /*
447c478bd9Sstevel@tonic-gate  * XXX The functions in this file are only needed to support transport
45*d2b5b2d3SAnders Persson  * providers that have not yet been converted to use /etc/sock2path.d.
467c478bd9Sstevel@tonic-gate  * Once all transport providers have been converted this file can be
477c478bd9Sstevel@tonic-gate  * removed.
487c478bd9Sstevel@tonic-gate  */
497c478bd9Sstevel@tonic-gate 
507c478bd9Sstevel@tonic-gate static struct netconfig *_s_match_netconf(int family, int type, int proto,
517c478bd9Sstevel@tonic-gate 		void **nethandle);
527c478bd9Sstevel@tonic-gate 
537c478bd9Sstevel@tonic-gate /*
547c478bd9Sstevel@tonic-gate  * The following two string arrays map a number as specified
557c478bd9Sstevel@tonic-gate  * by a user of sockets, to the string as would be returned
567c478bd9Sstevel@tonic-gate  * by a call to getnetconfig().
577c478bd9Sstevel@tonic-gate  *
587c478bd9Sstevel@tonic-gate  * They are used by _s_match_netconf();
597c478bd9Sstevel@tonic-gate  *
607c478bd9Sstevel@tonic-gate  * proto_sw contains protocol entries for which there is a corresponding
617c478bd9Sstevel@tonic-gate  * /dev device. All others would presumably use raw IP and download the
627c478bd9Sstevel@tonic-gate  * desired protocol.
637c478bd9Sstevel@tonic-gate  */
647c478bd9Sstevel@tonic-gate static char *proto_sw[] = {
657c478bd9Sstevel@tonic-gate 	"",
667c478bd9Sstevel@tonic-gate 	"icmp",		/* 1 = ICMP */
677c478bd9Sstevel@tonic-gate 	"",
687c478bd9Sstevel@tonic-gate 	"",
697c478bd9Sstevel@tonic-gate 	"",
707c478bd9Sstevel@tonic-gate 	"",
717c478bd9Sstevel@tonic-gate 	"tcp",		/* 6 = TCP */
727c478bd9Sstevel@tonic-gate 	"",
737c478bd9Sstevel@tonic-gate 	"",
747c478bd9Sstevel@tonic-gate 	"",
757c478bd9Sstevel@tonic-gate 	"",
767c478bd9Sstevel@tonic-gate 	"",
777c478bd9Sstevel@tonic-gate 	"",
787c478bd9Sstevel@tonic-gate 	"",
797c478bd9Sstevel@tonic-gate 	"",
807c478bd9Sstevel@tonic-gate 	"",
817c478bd9Sstevel@tonic-gate 	"",
827c478bd9Sstevel@tonic-gate 	"udp",		/* 17 = UDP */
837c478bd9Sstevel@tonic-gate };
847c478bd9Sstevel@tonic-gate 
857c478bd9Sstevel@tonic-gate static char *family_sw[] = {
867c478bd9Sstevel@tonic-gate 	"-",		/* 0 = AF_UNSPEC */
877c478bd9Sstevel@tonic-gate 	"loopback",	/* 1 = AF_UNIX */
887c478bd9Sstevel@tonic-gate 	"inet",		/* 2 = AF_INET */
897c478bd9Sstevel@tonic-gate 	"implink",	/* 3 = AF_IMPLINK */
907c478bd9Sstevel@tonic-gate 	"pup",		/* 4 = AF_PUP */
917c478bd9Sstevel@tonic-gate 	"chaos",	/* 5 = AF_CHAOS */
927c478bd9Sstevel@tonic-gate 	"ns",		/* 6 = AF_NS */
937c478bd9Sstevel@tonic-gate 	"nbs",		/* 7 = AF_NBS */
947c478bd9Sstevel@tonic-gate 	"ecma",		/* 8 = AF_ECMA */
957c478bd9Sstevel@tonic-gate 	"datakit",	/* 9 = AF_DATAKIT */
967c478bd9Sstevel@tonic-gate 	"ccitt",	/* 10 = AF_CCITT */
977c478bd9Sstevel@tonic-gate 	"sna",		/* 11 = AF_SNA */
987c478bd9Sstevel@tonic-gate 	"decnet",	/* 12 = AF_DECnet */
997c478bd9Sstevel@tonic-gate 	"dli",		/* 13 = AF_DLI */
1007c478bd9Sstevel@tonic-gate 	"lat",		/* 14 = AF_LAT */
1017c478bd9Sstevel@tonic-gate 	"hylink",	/* 15 = AF_HYLINK */
1027c478bd9Sstevel@tonic-gate 	"appletalk",	/* 16 = AF_APPLETALK */
1037c478bd9Sstevel@tonic-gate 	"nit",		/* 17 = AF_NIT */
1047c478bd9Sstevel@tonic-gate 	"ieee802",	/* 18 = AF_802 */
1057c478bd9Sstevel@tonic-gate 	"osi",		/* 19 = AF_OSI */
1067c478bd9Sstevel@tonic-gate 	"x25",		/* 20 = AF_X25 */
1077c478bd9Sstevel@tonic-gate 	"osinet",	/* 21 = AF_OSINET */
1087c478bd9Sstevel@tonic-gate 	"gosip",	/* 22 = AF_GOSIP */
1097c478bd9Sstevel@tonic-gate 	"ipx",		/* 23 = AF_IPX */
1107c478bd9Sstevel@tonic-gate 	"route",	/* 24 = AF_ROUTE */
1117c478bd9Sstevel@tonic-gate 	"link",		/* 25 = AF_LINK */
1127c478bd9Sstevel@tonic-gate 	"inet6",	/* 26 = AF_INET6 */
1137c478bd9Sstevel@tonic-gate 	"key",		/* 27 = AF_KEY */
1147c478bd9Sstevel@tonic-gate };
1157c478bd9Sstevel@tonic-gate 
1167c478bd9Sstevel@tonic-gate /*
1177c478bd9Sstevel@tonic-gate  * Lookup family/type/protocol in /etc/netconfig.
1187c478bd9Sstevel@tonic-gate  * Returns the pathname and a prototype value (to be passed into SO_PROTOTYPE)
1197c478bd9Sstevel@tonic-gate  * The path is malloc'ed and has to be freed by the caller.
1207c478bd9Sstevel@tonic-gate  */
1217c478bd9Sstevel@tonic-gate int
_s_netconfig_path(int family,int type,int protocol,char ** pathp,int * prototype)1227c478bd9Sstevel@tonic-gate _s_netconfig_path(int family, int type, int protocol,
1237c478bd9Sstevel@tonic-gate 	char **pathp, int *prototype)
1247c478bd9Sstevel@tonic-gate {
1257c478bd9Sstevel@tonic-gate 	struct netconfig	*net;
1267c478bd9Sstevel@tonic-gate 	void				*nethandle;
1277c478bd9Sstevel@tonic-gate 	struct stat			stats;
1287c478bd9Sstevel@tonic-gate 
1297c478bd9Sstevel@tonic-gate 	net = _s_match_netconf(family, type, protocol, &nethandle);
1307c478bd9Sstevel@tonic-gate 	if (net == NULL)
1317c478bd9Sstevel@tonic-gate 		return (-1);
1327c478bd9Sstevel@tonic-gate 
1337c478bd9Sstevel@tonic-gate 	if (strcmp(net->nc_proto, NC_NOPROTO) != 0)
1347c478bd9Sstevel@tonic-gate 		*prototype = 0;
1357c478bd9Sstevel@tonic-gate 	else
1367c478bd9Sstevel@tonic-gate 		*prototype = protocol;
1377c478bd9Sstevel@tonic-gate 
1387c478bd9Sstevel@tonic-gate retry:
1397257d1b4Sraf 	if (stat(net->nc_device, &stats) < 0) {
1407c478bd9Sstevel@tonic-gate 		switch (errno) {
1417c478bd9Sstevel@tonic-gate 		case EINTR:
1427c478bd9Sstevel@tonic-gate 			goto retry;
1437c478bd9Sstevel@tonic-gate 
1447c478bd9Sstevel@tonic-gate 		case ENOENT:
1457c478bd9Sstevel@tonic-gate 		case ENOLINK:
1467c478bd9Sstevel@tonic-gate 		case ELOOP:
1477c478bd9Sstevel@tonic-gate 		case EMULTIHOP:
1487c478bd9Sstevel@tonic-gate 		case ENOTDIR:
1497c478bd9Sstevel@tonic-gate 			errno = EPFNOSUPPORT;
1507c478bd9Sstevel@tonic-gate 			break;
1517c478bd9Sstevel@tonic-gate 		}
1527c478bd9Sstevel@tonic-gate 		endnetconfig(nethandle); /* finished with netconfig struct */
1537c478bd9Sstevel@tonic-gate 		return (-1);
1547c478bd9Sstevel@tonic-gate 	}
1557c478bd9Sstevel@tonic-gate 	if (!S_ISCHR(stats.st_mode)) {
1567c478bd9Sstevel@tonic-gate 		errno = EPFNOSUPPORT;
1577c478bd9Sstevel@tonic-gate 		endnetconfig(nethandle); /* finished with netconfig struct */
1587c478bd9Sstevel@tonic-gate 		return (-1);
1597c478bd9Sstevel@tonic-gate 	}
1607c478bd9Sstevel@tonic-gate 	*pathp = malloc(strlen(net->nc_device) + 1);
1617c478bd9Sstevel@tonic-gate 	if (*pathp == NULL) {
1627c478bd9Sstevel@tonic-gate 		endnetconfig(nethandle);
1637c478bd9Sstevel@tonic-gate 		errno = ENOMEM;
1647c478bd9Sstevel@tonic-gate 		return (-1);
1657c478bd9Sstevel@tonic-gate 	}
1667c478bd9Sstevel@tonic-gate 	(void) strcpy(*pathp, net->nc_device);
1677c478bd9Sstevel@tonic-gate 	endnetconfig(nethandle); /* finished with netconfig struct */
1687c478bd9Sstevel@tonic-gate 	return (0);
1697c478bd9Sstevel@tonic-gate }
1707c478bd9Sstevel@tonic-gate 
1717c478bd9Sstevel@tonic-gate /*
1727c478bd9Sstevel@tonic-gate  * Match config entry for protocol
1737c478bd9Sstevel@tonic-gate  * requested.
1747c478bd9Sstevel@tonic-gate  */
1757c478bd9Sstevel@tonic-gate static struct netconfig *
_s_match_netconf(int family,int type,int proto,void ** nethandle)1767c478bd9Sstevel@tonic-gate _s_match_netconf(int family, int type, int proto, void **nethandle)
1777c478bd9Sstevel@tonic-gate {
1787c478bd9Sstevel@tonic-gate 	struct netconfig	*net;
1797c478bd9Sstevel@tonic-gate 	struct netconfig	*maybe;
1807c478bd9Sstevel@tonic-gate 	char			*oproto;
1817c478bd9Sstevel@tonic-gate 
1827c478bd9Sstevel@tonic-gate 	if (family < 0 ||
1837257d1b4Sraf 	    family >= (int)sizeof (family_sw) / (int)sizeof (char *) ||
1847257d1b4Sraf 	    proto < 0 || proto >= IPPROTO_MAX)  {
1857257d1b4Sraf 		errno = EPROTONOSUPPORT;
1867257d1b4Sraf 		return (NULL);
1877c478bd9Sstevel@tonic-gate 	}
1887c478bd9Sstevel@tonic-gate 	if (proto) {
1897c478bd9Sstevel@tonic-gate 		if (proto >= (int)sizeof (proto_sw) / (int)sizeof (char *))
1907c478bd9Sstevel@tonic-gate 			oproto = "";
1917257d1b4Sraf 		else
1927257d1b4Sraf 			oproto = proto_sw[proto];
1937c478bd9Sstevel@tonic-gate 	}
1947c478bd9Sstevel@tonic-gate 
1957c478bd9Sstevel@tonic-gate 	/*
1967c478bd9Sstevel@tonic-gate 	 * Loop through each entry in netconfig
1977c478bd9Sstevel@tonic-gate 	 * until one matches or we reach the end.
1987c478bd9Sstevel@tonic-gate 	 */
1997c478bd9Sstevel@tonic-gate 	if ((*nethandle = setnetconfig()) == NULL) {
2007c478bd9Sstevel@tonic-gate 		return (NULL);
2017c478bd9Sstevel@tonic-gate 	}
2027c478bd9Sstevel@tonic-gate 
2037c478bd9Sstevel@tonic-gate 	maybe = NULL;
2047c478bd9Sstevel@tonic-gate 	while ((net = getnetconfig(*nethandle)) != NULL) {
2057c478bd9Sstevel@tonic-gate 		/*
2067c478bd9Sstevel@tonic-gate 		 * We make a copy of net->nc_semantics rather than modifying
2077c478bd9Sstevel@tonic-gate 		 * it in place because the network selection code shares the
2087c478bd9Sstevel@tonic-gate 		 * structures returned by getnetconfig() among all its callers.
2097c478bd9Sstevel@tonic-gate 		 * See bug #1160886 for more details.
2107c478bd9Sstevel@tonic-gate 		 */
2117c478bd9Sstevel@tonic-gate 		unsigned int semantics = net->nc_semantics;
2127c478bd9Sstevel@tonic-gate 
2137c478bd9Sstevel@tonic-gate 		if (semantics == NC_TPI_COTS_ORD)
2147c478bd9Sstevel@tonic-gate 			semantics = NC_TPI_COTS;
2157c478bd9Sstevel@tonic-gate 		if (proto) {
2167c478bd9Sstevel@tonic-gate 			if (strcmp(net->nc_protofmly, family_sw[family]) == 0 &&
2177c478bd9Sstevel@tonic-gate 			    semantics == type &&
2187c478bd9Sstevel@tonic-gate 			    strcmp(net->nc_proto, oproto) == 0)
2197c478bd9Sstevel@tonic-gate 				break;
2207c478bd9Sstevel@tonic-gate 
2217c478bd9Sstevel@tonic-gate 			if (strcmp(net->nc_protofmly, family_sw[family]) == 0 &&
2227c478bd9Sstevel@tonic-gate 			    type == SOCK_RAW &&
2237c478bd9Sstevel@tonic-gate 			    semantics == SOCK_RAW &&
2247c478bd9Sstevel@tonic-gate 			    strcmp(net->nc_proto, NC_NOPROTO) == 0 &&
2257c478bd9Sstevel@tonic-gate 			    maybe == NULL)
2267c478bd9Sstevel@tonic-gate 				maybe = net;	/* in case no exact match */
2277c478bd9Sstevel@tonic-gate 
2287c478bd9Sstevel@tonic-gate 			continue;
2297c478bd9Sstevel@tonic-gate 		} else	{
2307c478bd9Sstevel@tonic-gate 			if (strcmp(net->nc_protofmly, family_sw[family]) == 0 &&
2317257d1b4Sraf 			    semantics == type) {
2327c478bd9Sstevel@tonic-gate 				break;
2337c478bd9Sstevel@tonic-gate 			}
2347c478bd9Sstevel@tonic-gate 		}
2357c478bd9Sstevel@tonic-gate 	}
2367c478bd9Sstevel@tonic-gate 	if (net == NULL && maybe)
2377c478bd9Sstevel@tonic-gate 		net = maybe;
2387c478bd9Sstevel@tonic-gate 
2397c478bd9Sstevel@tonic-gate 	if (net == NULL) {
2407c478bd9Sstevel@tonic-gate 		endnetconfig(*nethandle);
2417c478bd9Sstevel@tonic-gate 		errno = EPROTONOSUPPORT;
2427c478bd9Sstevel@tonic-gate 		return (NULL);
2437c478bd9Sstevel@tonic-gate 	}
2447c478bd9Sstevel@tonic-gate 
2457c478bd9Sstevel@tonic-gate 	return (net);
2467c478bd9Sstevel@tonic-gate }
247