rpc_generic.c revision 92905 
1/*	$NetBSD: rpc_generic.c,v 1.4 2000/09/28 09:07:04 kleink Exp $	*/
2/*	$FreeBSD: head/lib/libc/rpc/rpc_generic.c 92905 2002-03-21 22:49:10Z obrien $ */
3
4/*
5 * Sun RPC is a product of Sun Microsystems, Inc. and is provided for
6 * unrestricted use provided that this legend is included on all tape
7 * media and as a part of the software program in whole or part.  Users
8 * may copy or modify Sun RPC without charge, but are not authorized
9 * to license or distribute it to anyone else except as part of a product or
10 * program developed by the user.
11 *
12 * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
13 * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
14 * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
15 *
16 * Sun RPC is provided with no support and without any obligation on the
17 * part of Sun Microsystems, Inc. to assist in its use, correction,
18 * modification or enhancement.
19 *
20 * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
21 * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
22 * OR ANY PART THEREOF.
23 *
24 * In no event will Sun Microsystems, Inc. be liable for any lost revenue
25 * or profits or other special, indirect and consequential damages, even if
26 * Sun has been advised of the possibility of such damages.
27 *
28 * Sun Microsystems, Inc.
29 * 2550 Garcia Avenue
30 * Mountain View, California  94043
31 */
32/*
33 * Copyright (c) 1986-1991 by Sun Microsystems Inc.
34 */
35
36/* #pragma ident	"@(#)rpc_generic.c	1.17	94/04/24 SMI" */
37
38/*
39 * rpc_generic.c, Miscl routines for RPC.
40 *
41 */
42
43#include "namespace.h"
44#include "reentrant.h"
45#include <sys/types.h>
46#include <sys/param.h>
47#include <sys/socket.h>
48#include <sys/time.h>
49#include <sys/un.h>
50#include <sys/resource.h>
51#include <netinet/in.h>
52#include <arpa/inet.h>
53#include <rpc/rpc.h>
54#include <ctype.h>
55#include <stddef.h>
56#include <stdio.h>
57#include <netdb.h>
58#include <netconfig.h>
59#include <stdlib.h>
60#include <string.h>
61#include <syslog.h>
62#include <rpc/nettype.h>
63#include "un-namespace.h"
64#include "rpc_com.h"
65
66struct handle {
67	NCONF_HANDLE *nhandle;
68	int nflag;		/* Whether NETPATH or NETCONFIG */
69	int nettype;
70};
71
72static const struct _rpcnettype {
73	const char *name;
74	const int type;
75} _rpctypelist[] = {
76	{ "netpath", _RPC_NETPATH },
77	{ "visible", _RPC_VISIBLE },
78	{ "circuit_v", _RPC_CIRCUIT_V },
79	{ "datagram_v", _RPC_DATAGRAM_V },
80	{ "circuit_n", _RPC_CIRCUIT_N },
81	{ "datagram_n", _RPC_DATAGRAM_N },
82	{ "tcp", _RPC_TCP },
83	{ "udp", _RPC_UDP },
84	{ 0, _RPC_NONE }
85};
86
87struct netid_af {
88	const char	*netid;
89	int		af;
90	int		protocol;
91};
92
93static const struct netid_af na_cvt[] = {
94	{ "udp",  AF_INET,  IPPROTO_UDP },
95	{ "tcp",  AF_INET,  IPPROTO_TCP },
96#ifdef INET6
97	{ "udp6", AF_INET6, IPPROTO_UDP },
98	{ "tcp6", AF_INET6, IPPROTO_TCP },
99#endif
100	{ "unix", AF_LOCAL, 0 }
101};
102
103#if 0
104static char *strlocase(char *);
105#endif
106static int getnettype(const char *);
107
108/*
109 * Cache the result of getrlimit(), so we don't have to do an
110 * expensive call every time.
111 */
112int
113__rpc_dtbsize()
114{
115	static int tbsize;
116	struct rlimit rl;
117
118	if (tbsize) {
119		return (tbsize);
120	}
121	if (getrlimit(RLIMIT_NOFILE, &rl) == 0) {
122		return (tbsize = (int)rl.rlim_max);
123	}
124	/*
125	 * Something wrong.  I'll try to save face by returning a
126	 * pessimistic number.
127	 */
128	return (32);
129}
130
131
132/*
133 * Find the appropriate buffer size
134 */
135u_int
136/*ARGSUSED*/
137__rpc_get_t_size(af, proto, size)
138	int af, proto;
139	int size;	/* Size requested */
140{
141	int maxsize, defsize;
142
143	maxsize = 256 * 1024;	/* XXX */
144	switch (proto) {
145	case IPPROTO_TCP:
146		defsize = 64 * 1024;	/* XXX */
147		break;
148	case IPPROTO_UDP:
149		defsize = UDPMSGSIZE;
150		break;
151	default:
152		defsize = RPC_MAXDATASIZE;
153		break;
154	}
155	if (size == 0)
156		return defsize;
157
158	/* Check whether the value is within the upper max limit */
159	return (size > maxsize ? (u_int)maxsize : (u_int)size);
160}
161
162/*
163 * Find the appropriate address buffer size
164 */
165u_int
166__rpc_get_a_size(af)
167	int af;
168{
169	switch (af) {
170	case AF_INET:
171		return sizeof (struct sockaddr_in);
172#ifdef INET6
173	case AF_INET6:
174		return sizeof (struct sockaddr_in6);
175#endif
176	case AF_LOCAL:
177		return sizeof (struct sockaddr_un);
178	default:
179		break;
180	}
181	return ((u_int)RPC_MAXADDRSIZE);
182}
183
184#if 0
185static char *
186strlocase(p)
187	char *p;
188{
189	char *t = p;
190
191	for (; *p; p++)
192		if (isupper(*p))
193			*p = tolower(*p);
194	return (t);
195}
196#endif
197
198/*
199 * Returns the type of the network as defined in <rpc/nettype.h>
200 * If nettype is NULL, it defaults to NETPATH.
201 */
202static int
203getnettype(nettype)
204	const char *nettype;
205{
206	int i;
207
208	if ((nettype == NULL) || (nettype[0] == NULL)) {
209		return (_RPC_NETPATH);	/* Default */
210	}
211
212#if 0
213	nettype = strlocase(nettype);
214#endif
215	for (i = 0; _rpctypelist[i].name; i++)
216		if (strcasecmp(nettype, _rpctypelist[i].name) == 0) {
217			return (_rpctypelist[i].type);
218		}
219	return (_rpctypelist[i].type);
220}
221
222/*
223 * For the given nettype (tcp or udp only), return the first structure found.
224 * This should be freed by calling freenetconfigent()
225 */
226struct netconfig *
227__rpc_getconfip(nettype)
228	const char *nettype;
229{
230	char *netid;
231	char *netid_tcp = (char *) NULL;
232	char *netid_udp = (char *) NULL;
233	static char *netid_tcp_main;
234	static char *netid_udp_main;
235	struct netconfig *dummy;
236	int main_thread;
237	static thread_key_t tcp_key, udp_key;
238	extern mutex_t tsd_lock;
239
240	if ((main_thread = thr_main())) {
241		netid_udp = netid_udp_main;
242		netid_tcp = netid_tcp_main;
243	} else {
244		if (tcp_key == 0) {
245			mutex_lock(&tsd_lock);
246			if (tcp_key == 0)
247				thr_keycreate(&tcp_key, free);
248			mutex_unlock(&tsd_lock);
249		}
250		netid_tcp = (char *)thr_getspecific(tcp_key);
251		if (udp_key == 0) {
252			mutex_lock(&tsd_lock);
253			if (udp_key == 0)
254				thr_keycreate(&udp_key, free);
255			mutex_unlock(&tsd_lock);
256		}
257		netid_udp = (char *)thr_getspecific(udp_key);
258	}
259	if (!netid_udp && !netid_tcp) {
260		struct netconfig *nconf;
261		void *confighandle;
262
263		if (!(confighandle = setnetconfig())) {
264			syslog (LOG_ERR, "rpc: failed to open " NETCONFIG);
265			return (NULL);
266		}
267		while ((nconf = getnetconfig(confighandle)) != NULL) {
268			if (strcmp(nconf->nc_protofmly, NC_INET) == 0) {
269				if (strcmp(nconf->nc_proto, NC_TCP) == 0) {
270					netid_tcp = strdup(nconf->nc_netid);
271					if (main_thread)
272						netid_tcp_main = netid_tcp;
273					else
274						thr_setspecific(tcp_key,
275							(void *) netid_tcp);
276				} else
277				if (strcmp(nconf->nc_proto, NC_UDP) == 0) {
278					netid_udp = strdup(nconf->nc_netid);
279					if (main_thread)
280						netid_udp_main = netid_udp;
281					else
282						thr_setspecific(udp_key,
283						(void *) netid_udp);
284				}
285			}
286		}
287		endnetconfig(confighandle);
288	}
289	if (strcmp(nettype, "udp") == 0)
290		netid = netid_udp;
291	else if (strcmp(nettype, "tcp") == 0)
292		netid = netid_tcp;
293	else {
294		return (NULL);
295	}
296	if ((netid == NULL) || (netid[0] == NULL)) {
297		return (NULL);
298	}
299	dummy = getnetconfigent(netid);
300	return (dummy);
301}
302
303/*
304 * Returns the type of the nettype, which should then be used with
305 * __rpc_getconf().
306 */
307void *
308__rpc_setconf(nettype)
309	const char *nettype;
310{
311	struct handle *handle;
312
313	handle = (struct handle *) malloc(sizeof (struct handle));
314	if (handle == NULL) {
315		return (NULL);
316	}
317	switch (handle->nettype = getnettype(nettype)) {
318	case _RPC_NETPATH:
319	case _RPC_CIRCUIT_N:
320	case _RPC_DATAGRAM_N:
321		if (!(handle->nhandle = setnetpath())) {
322			free(handle);
323			return (NULL);
324		}
325		handle->nflag = TRUE;
326		break;
327	case _RPC_VISIBLE:
328	case _RPC_CIRCUIT_V:
329	case _RPC_DATAGRAM_V:
330	case _RPC_TCP:
331	case _RPC_UDP:
332		if (!(handle->nhandle = setnetconfig())) {
333		        syslog (LOG_ERR, "rpc: failed to open " NETCONFIG);
334			free(handle);
335			return (NULL);
336		}
337		handle->nflag = FALSE;
338		break;
339	default:
340		return (NULL);
341	}
342
343	return (handle);
344}
345
346/*
347 * Returns the next netconfig struct for the given "net" type.
348 * __rpc_setconf() should have been called previously.
349 */
350struct netconfig *
351__rpc_getconf(vhandle)
352	void *vhandle;
353{
354	struct handle *handle;
355	struct netconfig *nconf;
356
357	handle = (struct handle *)vhandle;
358	if (handle == NULL) {
359		return (NULL);
360	}
361	for (;;) {
362		if (handle->nflag)
363			nconf = getnetpath(handle->nhandle);
364		else
365			nconf = getnetconfig(handle->nhandle);
366		if (nconf == NULL)
367			break;
368		if ((nconf->nc_semantics != NC_TPI_CLTS) &&
369			(nconf->nc_semantics != NC_TPI_COTS) &&
370			(nconf->nc_semantics != NC_TPI_COTS_ORD))
371			continue;
372		switch (handle->nettype) {
373		case _RPC_VISIBLE:
374			if (!(nconf->nc_flag & NC_VISIBLE))
375				continue;
376			/* FALLTHROUGH */
377		case _RPC_NETPATH:	/* Be happy */
378			break;
379		case _RPC_CIRCUIT_V:
380			if (!(nconf->nc_flag & NC_VISIBLE))
381				continue;
382			/* FALLTHROUGH */
383		case _RPC_CIRCUIT_N:
384			if ((nconf->nc_semantics != NC_TPI_COTS) &&
385				(nconf->nc_semantics != NC_TPI_COTS_ORD))
386				continue;
387			break;
388		case _RPC_DATAGRAM_V:
389			if (!(nconf->nc_flag & NC_VISIBLE))
390				continue;
391			/* FALLTHROUGH */
392		case _RPC_DATAGRAM_N:
393			if (nconf->nc_semantics != NC_TPI_CLTS)
394				continue;
395			break;
396		case _RPC_TCP:
397			if (((nconf->nc_semantics != NC_TPI_COTS) &&
398				(nconf->nc_semantics != NC_TPI_COTS_ORD)) ||
399				(strcmp(nconf->nc_protofmly, NC_INET)
400#ifdef INET6
401				 && strcmp(nconf->nc_protofmly, NC_INET6))
402#else
403				)
404#endif
405				||
406				strcmp(nconf->nc_proto, NC_TCP))
407				continue;
408			break;
409		case _RPC_UDP:
410			if ((nconf->nc_semantics != NC_TPI_CLTS) ||
411				(strcmp(nconf->nc_protofmly, NC_INET)
412#ifdef INET6
413				&& strcmp(nconf->nc_protofmly, NC_INET6))
414#else
415				)
416#endif
417				||
418				strcmp(nconf->nc_proto, NC_UDP))
419				continue;
420			break;
421		}
422		break;
423	}
424	return (nconf);
425}
426
427void
428__rpc_endconf(vhandle)
429	void * vhandle;
430{
431	struct handle *handle;
432
433	handle = (struct handle *) vhandle;
434	if (handle == NULL) {
435		return;
436	}
437	if (handle->nflag) {
438		endnetpath(handle->nhandle);
439	} else {
440		endnetconfig(handle->nhandle);
441	}
442	free(handle);
443}
444
445/*
446 * Used to ping the NULL procedure for clnt handle.
447 * Returns NULL if fails, else a non-NULL pointer.
448 */
449void *
450rpc_nullproc(clnt)
451	CLIENT *clnt;
452{
453	struct timeval TIMEOUT = {25, 0};
454
455	if (clnt_call(clnt, NULLPROC, (xdrproc_t) xdr_void, NULL,
456		(xdrproc_t) xdr_void, NULL, TIMEOUT) != RPC_SUCCESS) {
457		return (NULL);
458	}
459	return ((void *) clnt);
460}
461
462/*
463 * Try all possible transports until
464 * one succeeds in finding the netconf for the given fd.
465 */
466struct netconfig *
467__rpcgettp(fd)
468	int fd;
469{
470	const char *netid;
471	struct __rpc_sockinfo si;
472
473	if (!__rpc_fd2sockinfo(fd, &si))
474		return NULL;
475
476	if (!__rpc_sockinfo2netid(&si, &netid))
477		return NULL;
478
479	/*LINTED const castaway*/
480	return getnetconfigent((char *)netid);
481}
482
483int
484__rpc_fd2sockinfo(int fd, struct __rpc_sockinfo *sip)
485{
486	socklen_t len;
487	int type, proto;
488	struct sockaddr_storage ss;
489
490	len = sizeof ss;
491	if (_getsockname(fd, (struct sockaddr *)(void *)&ss, &len) < 0)
492		return 0;
493	sip->si_alen = len;
494
495	len = sizeof type;
496	if (_getsockopt(fd, SOL_SOCKET, SO_TYPE, &type, &len) < 0)
497		return 0;
498
499	/* XXX */
500	if (ss.ss_family != AF_LOCAL) {
501		if (type == SOCK_STREAM)
502			proto = IPPROTO_TCP;
503		else if (type == SOCK_DGRAM)
504			proto = IPPROTO_UDP;
505		else
506			return 0;
507	} else
508		proto = 0;
509
510	sip->si_af = ss.ss_family;
511	sip->si_proto = proto;
512	sip->si_socktype = type;
513
514	return 1;
515}
516
517/*
518 * Linear search, but the number of entries is small.
519 */
520int
521__rpc_nconf2sockinfo(const struct netconfig *nconf, struct __rpc_sockinfo *sip)
522{
523	int i;
524
525	for (i = 0; i < (sizeof na_cvt) / (sizeof (struct netid_af)); i++)
526		if (!strcmp(na_cvt[i].netid, nconf->nc_netid)) {
527			sip->si_af = na_cvt[i].af;
528			sip->si_proto = na_cvt[i].protocol;
529			sip->si_socktype =
530			    __rpc_seman2socktype((int)nconf->nc_semantics);
531			if (sip->si_socktype == -1)
532				return 0;
533			sip->si_alen = __rpc_get_a_size(sip->si_af);
534			return 1;
535		}
536
537	return 0;
538}
539
540int
541__rpc_nconf2fd(const struct netconfig *nconf)
542{
543	struct __rpc_sockinfo si;
544
545	if (!__rpc_nconf2sockinfo(nconf, &si))
546		return 0;
547
548	return _socket(si.si_af, si.si_socktype, si.si_proto);
549}
550
551int
552__rpc_sockinfo2netid(struct __rpc_sockinfo *sip, const char **netid)
553{
554	int i;
555
556	for (i = 0; i < (sizeof na_cvt) / (sizeof (struct netid_af)); i++)
557		if (na_cvt[i].af == sip->si_af &&
558		    na_cvt[i].protocol == sip->si_proto) {
559			if (netid)
560				*netid = na_cvt[i].netid;
561			return 1;
562		}
563
564	return 0;
565}
566
567char *
568taddr2uaddr(const struct netconfig *nconf, const struct netbuf *nbuf)
569{
570	struct __rpc_sockinfo si;
571
572	if (!__rpc_nconf2sockinfo(nconf, &si))
573		return NULL;
574	return __rpc_taddr2uaddr_af(si.si_af, nbuf);
575}
576
577struct netbuf *
578uaddr2taddr(const struct netconfig *nconf, const char *uaddr)
579{
580	struct __rpc_sockinfo si;
581
582	if (!__rpc_nconf2sockinfo(nconf, &si))
583		return NULL;
584	return __rpc_uaddr2taddr_af(si.si_af, uaddr);
585}
586
587char *
588__rpc_taddr2uaddr_af(int af, const struct netbuf *nbuf)
589{
590	char *ret;
591	struct sockaddr_in *sin;
592	struct sockaddr_un *sun;
593	char namebuf[INET_ADDRSTRLEN];
594#ifdef INET6
595	struct sockaddr_in6 *sin6;
596	char namebuf6[INET6_ADDRSTRLEN];
597#endif
598	u_int16_t port;
599
600	switch (af) {
601	case AF_INET:
602		sin = nbuf->buf;
603		if (inet_ntop(af, &sin->sin_addr, namebuf, sizeof namebuf)
604		    == NULL)
605			return NULL;
606		port = ntohs(sin->sin_port);
607		if (asprintf(&ret, "%s.%u.%u", namebuf, ((u_int32_t)port) >> 8,
608		    port & 0xff) < 0)
609			return NULL;
610		break;
611#ifdef INET6
612	case AF_INET6:
613		sin6 = nbuf->buf;
614		if (inet_ntop(af, &sin6->sin6_addr, namebuf6, sizeof namebuf6)
615		    == NULL)
616			return NULL;
617		port = ntohs(sin6->sin6_port);
618		if (asprintf(&ret, "%s.%u.%u", namebuf6, ((u_int32_t)port) >> 8,
619		    port & 0xff) < 0)
620			return NULL;
621		break;
622#endif
623	case AF_LOCAL:
624		sun = nbuf->buf;
625		if (asprintf(&ret, "%.*s", (int)(sun->sun_len -
626		    offsetof(struct sockaddr_un, sun_path)),
627		    sun->sun_path) < 0)
628			return (NULL);
629		break;
630	default:
631		return NULL;
632	}
633
634	return ret;
635}
636
637struct netbuf *
638__rpc_uaddr2taddr_af(int af, const char *uaddr)
639{
640	struct netbuf *ret = NULL;
641	char *addrstr, *p;
642	unsigned port, portlo, porthi;
643	struct sockaddr_in *sin;
644#ifdef INET6
645	struct sockaddr_in6 *sin6;
646#endif
647	struct sockaddr_un *sun;
648
649	port = 0;
650	sin = NULL;
651	addrstr = strdup(uaddr);
652	if (addrstr == NULL)
653		return NULL;
654
655	/*
656	 * AF_LOCAL addresses are expected to be absolute
657	 * pathnames, anything else will be AF_INET or AF_INET6.
658	 */
659	if (*addrstr != '/') {
660		p = strrchr(addrstr, '.');
661		if (p == NULL)
662			goto out;
663		portlo = (unsigned)atoi(p + 1);
664		*p = '\0';
665
666		p = strrchr(addrstr, '.');
667		if (p == NULL)
668			goto out;
669		porthi = (unsigned)atoi(p + 1);
670		*p = '\0';
671		port = (porthi << 8) | portlo;
672	}
673
674	ret = (struct netbuf *)malloc(sizeof *ret);
675
676	switch (af) {
677	case AF_INET:
678		sin = (struct sockaddr_in *)malloc(sizeof *sin);
679		if (sin == NULL)
680			goto out;
681		memset(sin, 0, sizeof *sin);
682		sin->sin_family = AF_INET;
683		sin->sin_port = htons(port);
684		if (inet_pton(AF_INET, addrstr, &sin->sin_addr) <= 0) {
685			free(sin);
686			free(ret);
687			ret = NULL;
688			goto out;
689		}
690		sin->sin_len = ret->maxlen = ret->len = sizeof *sin;
691		ret->buf = sin;
692		break;
693#ifdef INET6
694	case AF_INET6:
695		sin6 = (struct sockaddr_in6 *)malloc(sizeof *sin6);
696		if (sin6 == NULL)
697			goto out;
698		memset(sin6, 0, sizeof *sin6);
699		sin6->sin6_family = AF_INET6;
700		sin6->sin6_port = htons(port);
701		if (inet_pton(AF_INET6, addrstr, &sin6->sin6_addr) <= 0) {
702			free(sin);
703			free(ret);
704			ret = NULL;
705			goto out;
706		}
707		sin6->sin6_len = ret->maxlen = ret->len = sizeof *sin6;
708		ret->buf = sin6;
709		break;
710#endif
711	case AF_LOCAL:
712		sun = (struct sockaddr_un *)malloc(sizeof *sun);
713		if (sun == NULL)
714			goto out;
715		memset(sun, 0, sizeof *sun);
716		sun->sun_family = AF_LOCAL;
717		strncpy(sun->sun_path, addrstr, sizeof(sun->sun_path) - 1);
718		ret->len = ret->maxlen = sun->sun_len = SUN_LEN(sun);
719		ret->buf = sun;
720		break;
721	default:
722		break;
723	}
724out:
725	free(addrstr);
726	return ret;
727}
728
729int
730__rpc_seman2socktype(int semantics)
731{
732	switch (semantics) {
733	case NC_TPI_CLTS:
734		return SOCK_DGRAM;
735	case NC_TPI_COTS_ORD:
736		return SOCK_STREAM;
737	case NC_TPI_RAW:
738		return SOCK_RAW;
739	default:
740		break;
741	}
742
743	return -1;
744}
745
746int
747__rpc_socktype2seman(int socktype)
748{
749	switch (socktype) {
750	case SOCK_DGRAM:
751		return NC_TPI_CLTS;
752	case SOCK_STREAM:
753		return NC_TPI_COTS_ORD;
754	case SOCK_RAW:
755		return NC_TPI_RAW;
756	default:
757		break;
758	}
759
760	return -1;
761}
762
763/*
764 * XXXX - IPv6 scope IDs can't be handled in universal addresses.
765 * Here, we compare the original server address to that of the RPC
766 * service we just received back from a call to rpcbind on the remote
767 * machine. If they are both "link local" or "site local", copy
768 * the scope id of the server address over to the service address.
769 */
770int
771__rpc_fixup_addr(struct netbuf *new, const struct netbuf *svc)
772{
773#ifdef INET6
774	struct sockaddr *sa_new, *sa_svc;
775	struct sockaddr_in6 *sin6_new, *sin6_svc;
776
777	sa_svc = (struct sockaddr *)svc->buf;
778	sa_new = (struct sockaddr *)new->buf;
779
780	if (sa_new->sa_family == sa_svc->sa_family &&
781	    sa_new->sa_family == AF_INET6) {
782		sin6_new = (struct sockaddr_in6 *)new->buf;
783		sin6_svc = (struct sockaddr_in6 *)svc->buf;
784
785		if ((IN6_IS_ADDR_LINKLOCAL(&sin6_new->sin6_addr) &&
786		     IN6_IS_ADDR_LINKLOCAL(&sin6_svc->sin6_addr)) ||
787		    (IN6_IS_ADDR_SITELOCAL(&sin6_new->sin6_addr) &&
788		     IN6_IS_ADDR_SITELOCAL(&sin6_svc->sin6_addr))) {
789			sin6_new->sin6_scope_id = sin6_svc->sin6_scope_id;
790		}
791	}
792#endif
793	return 1;
794}
795
796int
797__rpc_sockisbound(int fd)
798{
799	struct sockaddr_storage ss;
800	socklen_t slen;
801
802	slen = sizeof (struct sockaddr_storage);
803	if (_getsockname(fd, (struct sockaddr *)(void *)&ss, &slen) < 0)
804		return 0;
805
806	switch (ss.ss_family) {
807		case AF_INET:
808			return (((struct sockaddr_in *)
809			    (void *)&ss)->sin_port != 0);
810#ifdef INET6
811		case AF_INET6:
812			return (((struct sockaddr_in6 *)
813			    (void *)&ss)->sin6_port != 0);
814#endif
815		case AF_LOCAL:
816			/* XXX check this */
817			return (((struct sockaddr_un *)
818			    (void *)&ss)->sun_path[0] != '\0');
819		default:
820			break;
821	}
822
823	return 0;
824}
825