rpc_generic.c revision 76044 
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 76044 2001-04-26 17:24:05Z iedowse $ */
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 <stdio.h>
56#include <netdb.h>
57#include <netconfig.h>
58#include <stdlib.h>
59#include <string.h>
60#include <syslog.h>
61#include <rpc/nettype.h>
62#include "un-namespace.h"
63#include "rpc_com.h"
64
65struct handle {
66	NCONF_HANDLE *nhandle;
67	int nflag;		/* Whether NETPATH or NETCONFIG */
68	int nettype;
69};
70
71static const struct _rpcnettype {
72	const char *name;
73	const int type;
74} _rpctypelist[] = {
75	{ "netpath", _RPC_NETPATH },
76	{ "visible", _RPC_VISIBLE },
77	{ "circuit_v", _RPC_CIRCUIT_V },
78	{ "datagram_v", _RPC_DATAGRAM_V },
79	{ "circuit_n", _RPC_CIRCUIT_N },
80	{ "datagram_n", _RPC_DATAGRAM_N },
81	{ "tcp", _RPC_TCP },
82	{ "udp", _RPC_UDP },
83	{ 0, _RPC_NONE }
84};
85
86struct netid_af {
87	const char	*netid;
88	int		af;
89	int		protocol;
90};
91
92static const struct netid_af na_cvt[] = {
93	{ "udp",  AF_INET,  IPPROTO_UDP },
94	{ "tcp",  AF_INET,  IPPROTO_TCP },
95#ifdef INET6
96	{ "udp6", AF_INET6, IPPROTO_UDP },
97	{ "tcp6", AF_INET6, IPPROTO_TCP },
98#endif
99	{ "unix", AF_LOCAL, 0 }
100};
101
102#if 0
103static char *strlocase __P((char *));
104#endif
105static int getnettype __P((const char *));
106
107/*
108 * Cache the result of getrlimit(), so we don't have to do an
109 * expensive call every time.
110 */
111int
112__rpc_dtbsize()
113{
114	static int tbsize;
115	struct rlimit rl;
116
117	if (tbsize) {
118		return (tbsize);
119	}
120	if (getrlimit(RLIMIT_NOFILE, &rl) == 0) {
121		return (tbsize = (int)rl.rlim_max);
122	}
123	/*
124	 * Something wrong.  I'll try to save face by returning a
125	 * pessimistic number.
126	 */
127	return (32);
128}
129
130
131/*
132 * Find the appropriate buffer size
133 */
134u_int
135/*ARGSUSED*/
136__rpc_get_t_size(af, proto, size)
137	int af, proto;
138	int size;	/* Size requested */
139{
140	int maxsize, defsize;
141
142	maxsize = 256 * 1024;	/* XXX */
143	switch (proto) {
144	case IPPROTO_TCP:
145		defsize = 64 * 1024;	/* XXX */
146		break;
147	case IPPROTO_UDP:
148		defsize = UDPMSGSIZE;
149		break;
150	default:
151		defsize = RPC_MAXDATASIZE;
152		break;
153	}
154	if (size == 0)
155		return defsize;
156
157	/* Check whether the value is within the upper max limit */
158	return (size > maxsize ? (u_int)maxsize : (u_int)size);
159}
160
161/*
162 * Find the appropriate address buffer size
163 */
164u_int
165__rpc_get_a_size(af)
166	int af;
167{
168	switch (af) {
169	case AF_INET:
170		return sizeof (struct sockaddr_in);
171#ifdef INET6
172	case AF_INET6:
173		return sizeof (struct sockaddr_in6);
174#endif
175	case AF_LOCAL:
176		return sizeof (struct sockaddr_un);
177	default:
178		break;
179	}
180	return ((u_int)RPC_MAXADDRSIZE);
181}
182
183#if 0
184static char *
185strlocase(p)
186	char *p;
187{
188	char *t = p;
189
190	for (; *p; p++)
191		if (isupper(*p))
192			*p = tolower(*p);
193	return (t);
194}
195#endif
196
197/*
198 * Returns the type of the network as defined in <rpc/nettype.h>
199 * If nettype is NULL, it defaults to NETPATH.
200 */
201static int
202getnettype(nettype)
203	const char *nettype;
204{
205	int i;
206
207	if ((nettype == NULL) || (nettype[0] == NULL)) {
208		return (_RPC_NETPATH);	/* Default */
209	}
210
211#if 0
212	nettype = strlocase(nettype);
213#endif
214	for (i = 0; _rpctypelist[i].name; i++)
215		if (strcasecmp(nettype, _rpctypelist[i].name) == 0) {
216			return (_rpctypelist[i].type);
217		}
218	return (_rpctypelist[i].type);
219}
220
221/*
222 * For the given nettype (tcp or udp only), return the first structure found.
223 * This should be freed by calling freenetconfigent()
224 */
225struct netconfig *
226__rpc_getconfip(nettype)
227	const char *nettype;
228{
229	char *netid;
230	char *netid_tcp = (char *) NULL;
231	char *netid_udp = (char *) NULL;
232	static char *netid_tcp_main;
233	static char *netid_udp_main;
234	struct netconfig *dummy;
235	int main_thread;
236	static thread_key_t tcp_key, udp_key;
237	extern mutex_t tsd_lock;
238
239	if ((main_thread = thr_main())) {
240		netid_udp = netid_udp_main;
241		netid_tcp = netid_tcp_main;
242	} else {
243		if (tcp_key == 0) {
244			mutex_lock(&tsd_lock);
245			if (tcp_key == 0)
246				thr_keycreate(&tcp_key, free);
247			mutex_unlock(&tsd_lock);
248		}
249		netid_tcp = (char *)thr_getspecific(tcp_key);
250		if (udp_key == 0) {
251			mutex_lock(&tsd_lock);
252			if (udp_key == 0)
253				thr_keycreate(&udp_key, free);
254			mutex_unlock(&tsd_lock);
255		}
256		netid_udp = (char *)thr_getspecific(udp_key);
257	}
258	if (!netid_udp && !netid_tcp) {
259		struct netconfig *nconf;
260		void *confighandle;
261
262		if (!(confighandle = setnetconfig())) {
263			syslog (LOG_ERR, "rpc: failed to open " NETCONFIG);
264			return (NULL);
265		}
266		while ((nconf = getnetconfig(confighandle)) != NULL) {
267			if (strcmp(nconf->nc_protofmly, NC_INET) == 0) {
268				if (strcmp(nconf->nc_proto, NC_TCP) == 0) {
269					netid_tcp = strdup(nconf->nc_netid);
270					if (main_thread)
271						netid_tcp_main = netid_tcp;
272					else
273						thr_setspecific(tcp_key,
274							(void *) netid_tcp);
275				} else
276				if (strcmp(nconf->nc_proto, NC_UDP) == 0) {
277					netid_udp = strdup(nconf->nc_netid);
278					if (main_thread)
279						netid_udp_main = netid_udp;
280					else
281						thr_setspecific(udp_key,
282						(void *) netid_udp);
283				}
284			}
285		}
286		endnetconfig(confighandle);
287	}
288	if (strcmp(nettype, "udp") == 0)
289		netid = netid_udp;
290	else if (strcmp(nettype, "tcp") == 0)
291		netid = netid_tcp;
292	else {
293		return (NULL);
294	}
295	if ((netid == NULL) || (netid[0] == NULL)) {
296		return (NULL);
297	}
298	dummy = getnetconfigent(netid);
299	return (dummy);
300}
301
302/*
303 * Returns the type of the nettype, which should then be used with
304 * __rpc_getconf().
305 */
306void *
307__rpc_setconf(nettype)
308	const char *nettype;
309{
310	struct handle *handle;
311
312	handle = (struct handle *) malloc(sizeof (struct handle));
313	if (handle == NULL) {
314		return (NULL);
315	}
316	switch (handle->nettype = getnettype(nettype)) {
317	case _RPC_NETPATH:
318	case _RPC_CIRCUIT_N:
319	case _RPC_DATAGRAM_N:
320		if (!(handle->nhandle = setnetpath())) {
321			free(handle);
322			return (NULL);
323		}
324		handle->nflag = TRUE;
325		break;
326	case _RPC_VISIBLE:
327	case _RPC_CIRCUIT_V:
328	case _RPC_DATAGRAM_V:
329	case _RPC_TCP:
330	case _RPC_UDP:
331		if (!(handle->nhandle = setnetconfig())) {
332		        syslog (LOG_ERR, "rpc: failed to open " NETCONFIG);
333			free(handle);
334			return (NULL);
335		}
336		handle->nflag = FALSE;
337		break;
338	default:
339		return (NULL);
340	}
341
342	return (handle);
343}
344
345/*
346 * Returns the next netconfig struct for the given "net" type.
347 * __rpc_setconf() should have been called previously.
348 */
349struct netconfig *
350__rpc_getconf(vhandle)
351	void *vhandle;
352{
353	struct handle *handle;
354	struct netconfig *nconf;
355
356	handle = (struct handle *)vhandle;
357	if (handle == NULL) {
358		return (NULL);
359	}
360	for (;;) {
361		if (handle->nflag)
362			nconf = getnetpath(handle->nhandle);
363		else
364			nconf = getnetconfig(handle->nhandle);
365		if (nconf == NULL)
366			break;
367		if ((nconf->nc_semantics != NC_TPI_CLTS) &&
368			(nconf->nc_semantics != NC_TPI_COTS) &&
369			(nconf->nc_semantics != NC_TPI_COTS_ORD))
370			continue;
371		switch (handle->nettype) {
372		case _RPC_VISIBLE:
373			if (!(nconf->nc_flag & NC_VISIBLE))
374				continue;
375			/* FALLTHROUGH */
376		case _RPC_NETPATH:	/* Be happy */
377			break;
378		case _RPC_CIRCUIT_V:
379			if (!(nconf->nc_flag & NC_VISIBLE))
380				continue;
381			/* FALLTHROUGH */
382		case _RPC_CIRCUIT_N:
383			if ((nconf->nc_semantics != NC_TPI_COTS) &&
384				(nconf->nc_semantics != NC_TPI_COTS_ORD))
385				continue;
386			break;
387		case _RPC_DATAGRAM_V:
388			if (!(nconf->nc_flag & NC_VISIBLE))
389				continue;
390			/* FALLTHROUGH */
391		case _RPC_DATAGRAM_N:
392			if (nconf->nc_semantics != NC_TPI_CLTS)
393				continue;
394			break;
395		case _RPC_TCP:
396			if (((nconf->nc_semantics != NC_TPI_COTS) &&
397				(nconf->nc_semantics != NC_TPI_COTS_ORD)) ||
398				(strcmp(nconf->nc_protofmly, NC_INET)
399#ifdef INET6
400				 && strcmp(nconf->nc_protofmly, NC_INET6))
401#else
402				)
403#endif
404				||
405				strcmp(nconf->nc_proto, NC_TCP))
406				continue;
407			break;
408		case _RPC_UDP:
409			if ((nconf->nc_semantics != NC_TPI_CLTS) ||
410				(strcmp(nconf->nc_protofmly, NC_INET)
411#ifdef INET6
412				&& strcmp(nconf->nc_protofmly, NC_INET6))
413#else
414				)
415#endif
416				||
417				strcmp(nconf->nc_proto, NC_UDP))
418				continue;
419			break;
420		}
421		break;
422	}
423	return (nconf);
424}
425
426void
427__rpc_endconf(vhandle)
428	void * vhandle;
429{
430	struct handle *handle;
431
432	handle = (struct handle *) vhandle;
433	if (handle == NULL) {
434		return;
435	}
436	if (handle->nflag) {
437		endnetpath(handle->nhandle);
438	} else {
439		endnetconfig(handle->nhandle);
440	}
441	free(handle);
442}
443
444/*
445 * Used to ping the NULL procedure for clnt handle.
446 * Returns NULL if fails, else a non-NULL pointer.
447 */
448void *
449rpc_nullproc(clnt)
450	CLIENT *clnt;
451{
452	struct timeval TIMEOUT = {25, 0};
453
454	if (clnt_call(clnt, NULLPROC, (xdrproc_t) xdr_void, NULL,
455		(xdrproc_t) xdr_void, NULL, TIMEOUT) != RPC_SUCCESS) {
456		return (NULL);
457	}
458	return ((void *) clnt);
459}
460
461/*
462 * Try all possible transports until
463 * one succeeds in finding the netconf for the given fd.
464 */
465struct netconfig *
466__rpcgettp(fd)
467	int fd;
468{
469	const char *netid;
470	struct __rpc_sockinfo si;
471
472	if (!__rpc_fd2sockinfo(fd, &si))
473		return NULL;
474
475	if (!__rpc_sockinfo2netid(&si, &netid))
476		return NULL;
477
478	/*LINTED const castaway*/
479	return getnetconfigent((char *)netid);
480}
481
482int
483__rpc_fd2sockinfo(int fd, struct __rpc_sockinfo *sip)
484{
485	socklen_t len;
486	int type, proto;
487	struct sockaddr_storage ss;
488
489	len = sizeof ss;
490	if (_getsockname(fd, (struct sockaddr *)(void *)&ss, &len) < 0)
491		return 0;
492	sip->si_alen = len;
493
494	len = sizeof type;
495	if (_getsockopt(fd, SOL_SOCKET, SO_TYPE, &type, &len) < 0)
496		return 0;
497
498	/* XXX */
499	if (ss.ss_family != AF_LOCAL) {
500		if (type == SOCK_STREAM)
501			proto = IPPROTO_TCP;
502		else if (type == SOCK_DGRAM)
503			proto = IPPROTO_UDP;
504		else
505			return 0;
506	} else
507		proto = 0;
508
509	sip->si_af = ss.ss_family;
510	sip->si_proto = proto;
511	sip->si_socktype = type;
512
513	return 1;
514}
515
516/*
517 * Linear search, but the number of entries is small.
518 */
519int
520__rpc_nconf2sockinfo(const struct netconfig *nconf, struct __rpc_sockinfo *sip)
521{
522	int i;
523
524	for (i = 0; i < (sizeof na_cvt) / (sizeof (struct netid_af)); i++)
525		if (!strcmp(na_cvt[i].netid, nconf->nc_netid)) {
526			sip->si_af = na_cvt[i].af;
527			sip->si_proto = na_cvt[i].protocol;
528			sip->si_socktype =
529			    __rpc_seman2socktype((int)nconf->nc_semantics);
530			if (sip->si_socktype == -1)
531				return 0;
532			sip->si_alen = __rpc_get_a_size(sip->si_af);
533			return 1;
534		}
535
536	return 0;
537}
538
539int
540__rpc_nconf2fd(const struct netconfig *nconf)
541{
542	struct __rpc_sockinfo si;
543
544	if (!__rpc_nconf2sockinfo(nconf, &si))
545		return 0;
546
547	return _socket(si.si_af, si.si_socktype, si.si_proto);
548}
549
550int
551__rpc_sockinfo2netid(struct __rpc_sockinfo *sip, const char **netid)
552{
553	int i;
554
555	for (i = 0; i < (sizeof na_cvt) / (sizeof (struct netid_af)); i++)
556		if (na_cvt[i].af == sip->si_af &&
557		    na_cvt[i].protocol == sip->si_proto) {
558			if (netid)
559				*netid = na_cvt[i].netid;
560			return 1;
561		}
562
563	return 0;
564}
565
566char *
567taddr2uaddr(const struct netconfig *nconf, const struct netbuf *nbuf)
568{
569	struct __rpc_sockinfo si;
570
571	if (!__rpc_nconf2sockinfo(nconf, &si))
572		return NULL;
573	return __rpc_taddr2uaddr_af(si.si_af, nbuf);
574}
575
576struct netbuf *
577uaddr2taddr(const struct netconfig *nconf, const char *uaddr)
578{
579	struct __rpc_sockinfo si;
580
581	if (!__rpc_nconf2sockinfo(nconf, &si))
582		return NULL;
583	return __rpc_uaddr2taddr_af(si.si_af, uaddr);
584}
585
586char *
587__rpc_taddr2uaddr_af(int af, const struct netbuf *nbuf)
588{
589	char *ret;
590	struct sockaddr_in *sin;
591	struct sockaddr_un *sun;
592	char namebuf[INET_ADDRSTRLEN];
593#ifdef INET6
594	struct sockaddr_in6 *sin6;
595	char namebuf6[INET6_ADDRSTRLEN];
596#endif
597	u_int16_t port;
598
599	switch (af) {
600	case AF_INET:
601		sin = nbuf->buf;
602		if (inet_ntop(af, &sin->sin_addr, namebuf, sizeof namebuf)
603		    == NULL)
604			return NULL;
605		port = ntohs(sin->sin_port);
606		if (asprintf(&ret, "%s.%u.%u", namebuf, ((u_int32_t)port) >> 8,
607		    port & 0xff) < 0)
608			return NULL;
609		break;
610#ifdef INET6
611	case AF_INET6:
612		sin6 = nbuf->buf;
613		if (inet_ntop(af, &sin6->sin6_addr, namebuf6, sizeof namebuf6)
614		    == NULL)
615			return NULL;
616		port = ntohs(sin6->sin6_port);
617		if (asprintf(&ret, "%s.%u.%u", namebuf6, ((u_int32_t)port) >> 8,
618		    port & 0xff) < 0)
619			return NULL;
620		break;
621#endif
622	case AF_LOCAL:
623		sun = nbuf->buf;
624		sun->sun_path[sizeof(sun->sun_path) - 1] = '\0'; /* safety */
625		ret = strdup(sun->sun_path);
626		break;
627	default:
628		return NULL;
629	}
630
631	return ret;
632}
633
634struct netbuf *
635__rpc_uaddr2taddr_af(int af, const char *uaddr)
636{
637	struct netbuf *ret = NULL;
638	char *addrstr, *p;
639	unsigned port, portlo, porthi;
640	struct sockaddr_in *sin;
641#ifdef INET6
642	struct sockaddr_in6 *sin6;
643#endif
644	struct sockaddr_un *sun;
645
646	addrstr = strdup(uaddr);
647	if (addrstr == NULL)
648		return NULL;
649
650	/*
651	 * AF_LOCAL addresses are expected to be absolute
652	 * pathnames, anything else will be AF_INET or AF_INET6.
653	 */
654	if (*addrstr != '/') {
655		p = strrchr(addrstr, '.');
656		if (p == NULL)
657			goto out;
658		portlo = (unsigned)atoi(p + 1);
659		*p = '\0';
660
661		p = strrchr(addrstr, '.');
662		if (p == NULL)
663			goto out;
664		porthi = (unsigned)atoi(p + 1);
665		*p = '\0';
666		port = (porthi << 8) | portlo;
667	}
668
669	ret = (struct netbuf *)malloc(sizeof *ret);
670
671	switch (af) {
672	case AF_INET:
673		sin = (struct sockaddr_in *)malloc(sizeof *sin);
674		if (sin == NULL)
675			goto out;
676		memset(sin, 0, sizeof *sin);
677		sin->sin_family = AF_INET;
678		sin->sin_port = htons(port);
679		if (inet_pton(AF_INET, addrstr, &sin->sin_addr) <= 0) {
680			free(sin);
681			free(ret);
682			ret = NULL;
683			goto out;
684		}
685		sin->sin_len = ret->maxlen = ret->len = sizeof *sin;
686		ret->buf = sin;
687		break;
688#ifdef INET6
689	case AF_INET6:
690		sin6 = (struct sockaddr_in6 *)malloc(sizeof *sin6);
691		if (sin6 == NULL)
692			goto out;
693		memset(sin6, 0, sizeof *sin6);
694		sin6->sin6_family = AF_INET6;
695		sin6->sin6_port = htons(port);
696		if (inet_pton(AF_INET6, addrstr, &sin6->sin6_addr) <= 0) {
697			free(sin);
698			free(ret);
699			ret = NULL;
700			goto out;
701		}
702		sin6->sin6_len = ret->maxlen = ret->len = sizeof *sin6;
703		ret->buf = sin6;
704		break;
705#endif
706	case AF_LOCAL:
707		sun = (struct sockaddr_un *)malloc(sizeof *sun);
708		if (sun == NULL)
709			goto out;
710		memset(sun, 0, sizeof *sun);
711		sun->sun_family = AF_LOCAL;
712		strncpy(sun->sun_path, addrstr, sizeof(sun->sun_path) - 1);
713		ret->len = ret->maxlen = sun->sun_len = SUN_LEN(sun);
714		ret->buf = sun;
715		break;
716	default:
717		break;
718	}
719out:
720	free(addrstr);
721	return ret;
722}
723
724int
725__rpc_seman2socktype(int semantics)
726{
727	switch (semantics) {
728	case NC_TPI_CLTS:
729		return SOCK_DGRAM;
730	case NC_TPI_COTS_ORD:
731		return SOCK_STREAM;
732	case NC_TPI_RAW:
733		return SOCK_RAW;
734	default:
735		break;
736	}
737
738	return -1;
739}
740
741int
742__rpc_socktype2seman(int socktype)
743{
744	switch (socktype) {
745	case SOCK_DGRAM:
746		return NC_TPI_CLTS;
747	case SOCK_STREAM:
748		return NC_TPI_COTS_ORD;
749	case SOCK_RAW:
750		return NC_TPI_RAW;
751	default:
752		break;
753	}
754
755	return -1;
756}
757
758/*
759 * XXXX - IPv6 scope IDs can't be handled in universal addresses.
760 * Here, we compare the original server address to that of the RPC
761 * service we just received back from a call to rpcbind on the remote
762 * machine. If they are both "link local" or "site local", copy
763 * the scope id of the server address over to the service address.
764 */
765int
766__rpc_fixup_addr(struct netbuf *new, const struct netbuf *svc)
767{
768#ifdef INET6
769	struct sockaddr *sa_new, *sa_svc;
770	struct sockaddr_in6 *sin6_new, *sin6_svc;
771
772	sa_svc = (struct sockaddr *)svc->buf;
773	sa_new = (struct sockaddr *)new->buf;
774
775	if (sa_new->sa_family == sa_svc->sa_family &&
776	    sa_new->sa_family == AF_INET6) {
777		sin6_new = (struct sockaddr_in6 *)new->buf;
778		sin6_svc = (struct sockaddr_in6 *)svc->buf;
779
780		if ((IN6_IS_ADDR_LINKLOCAL(&sin6_new->sin6_addr) &&
781		     IN6_IS_ADDR_LINKLOCAL(&sin6_svc->sin6_addr)) ||
782		    (IN6_IS_ADDR_SITELOCAL(&sin6_new->sin6_addr) &&
783		     IN6_IS_ADDR_SITELOCAL(&sin6_svc->sin6_addr))) {
784			sin6_new->sin6_scope_id = sin6_svc->sin6_scope_id;
785		}
786	}
787#endif
788	return 1;
789}
790
791int
792__rpc_sockisbound(int fd)
793{
794	struct sockaddr_storage ss;
795	socklen_t slen;
796
797	slen = sizeof (struct sockaddr_storage);
798	if (_getsockname(fd, (struct sockaddr *)(void *)&ss, &slen) < 0)
799		return 0;
800
801	switch (ss.ss_family) {
802		case AF_INET:
803			return (((struct sockaddr_in *)
804			    (void *)&ss)->sin_port != 0);
805#ifdef INET6
806		case AF_INET6:
807			return (((struct sockaddr_in6 *)
808			    (void *)&ss)->sin6_port != 0);
809#endif
810		case AF_LOCAL:
811			/* XXX check this */
812			return (((struct sockaddr_un *)
813			    (void *)&ss)->sun_path[0] != '\0');
814		default:
815			break;
816	}
817
818	return 0;
819}
820