1/*	$NetBSD: rpc_generic.c,v 1.4 2000/09/28 09:07:04 kleink Exp $	*/
2
3/*-
4 * SPDX-License-Identifier: BSD-3-Clause
5 *
6 * Copyright (c) 2009, Sun Microsystems, Inc.
7 * All rights reserved.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions are met:
11 * - Redistributions of source code must retain the above copyright notice,
12 *   this list of conditions and the following disclaimer.
13 * - Redistributions in binary form must reproduce the above copyright notice,
14 *   this list of conditions and the following disclaimer in the documentation
15 *   and/or other materials provided with the distribution.
16 * - Neither the name of Sun Microsystems, Inc. nor the names of its
17 *   contributors may be used to endorse or promote products derived
18 *   from this software without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
21 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
24 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
30 * POSSIBILITY OF SUCH DAMAGE.
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#include <sys/cdefs.h>
38__FBSDID("$FreeBSD$");
39
40/*
41 * rpc_generic.c, Miscl routines for RPC.
42 *
43 */
44
45#include "namespace.h"
46#include "reentrant.h"
47#include <sys/param.h>
48#include <sys/socket.h>
49#include <sys/time.h>
50#include <sys/un.h>
51#include <sys/resource.h>
52#include <netinet/in.h>
53#include <arpa/inet.h>
54#include <rpc/rpc.h>
55#include <ctype.h>
56#include <stddef.h>
57#include <stdio.h>
58#include <netdb.h>
59#include <netconfig.h>
60#include <stdlib.h>
61#include <string.h>
62#include <syslog.h>
63#include <rpc/nettype.h>
64#include "un-namespace.h"
65#include "rpc_com.h"
66#include "mt_misc.h"
67
68struct handle {
69	NCONF_HANDLE *nhandle;
70	int nflag;		/* Whether NETPATH or NETCONFIG */
71	int nettype;
72};
73
74static const struct _rpcnettype {
75	const char *name;
76	const int type;
77} _rpctypelist[] = {
78	{ "netpath", _RPC_NETPATH },
79	{ "visible", _RPC_VISIBLE },
80	{ "circuit_v", _RPC_CIRCUIT_V },
81	{ "datagram_v", _RPC_DATAGRAM_V },
82	{ "circuit_n", _RPC_CIRCUIT_N },
83	{ "datagram_n", _RPC_DATAGRAM_N },
84	{ "tcp", _RPC_TCP },
85	{ "udp", _RPC_UDP },
86	{ 0, _RPC_NONE }
87};
88
89struct netid_af {
90	const char	*netid;
91	int		af;
92	int		protocol;
93};
94
95static const struct netid_af na_cvt[] = {
96	{ "udp",  AF_INET,  IPPROTO_UDP },
97	{ "tcp",  AF_INET,  IPPROTO_TCP },
98#ifdef INET6
99	{ "udp6", AF_INET6, IPPROTO_UDP },
100	{ "tcp6", AF_INET6, IPPROTO_TCP },
101#endif
102	{ "local", AF_LOCAL, 0 }
103};
104
105#if 0
106static char *strlocase(char *);
107#endif
108static int getnettype(const char *);
109
110/*
111 * Cache the result of getrlimit(), so we don't have to do an
112 * expensive call every time.
113 */
114int
115__rpc_dtbsize(void)
116{
117	static int tbsize;
118	struct rlimit rl;
119
120	if (tbsize) {
121		return (tbsize);
122	}
123	if (getrlimit(RLIMIT_NOFILE, &rl) == 0) {
124		return (tbsize = (int)rl.rlim_max);
125	}
126	/*
127	 * Something wrong.  I'll try to save face by returning a
128	 * pessimistic number.
129	 */
130	return (32);
131}
132
133
134/*
135 * Find the appropriate buffer size
136 *
137 * size - Size requested
138 */
139u_int
140/*ARGSUSED*/
141__rpc_get_t_size(int af, int proto, int size)
142{
143	int maxsize, defsize;
144
145	maxsize = 256 * 1024;	/* XXX */
146	switch (proto) {
147	case IPPROTO_TCP:
148		defsize = 64 * 1024;	/* XXX */
149		break;
150	case IPPROTO_UDP:
151		defsize = UDPMSGSIZE;
152		break;
153	default:
154		defsize = RPC_MAXDATASIZE;
155		break;
156	}
157	if (size == 0)
158		return defsize;
159
160	/* Check whether the value is within the upper max limit */
161	return (size > maxsize ? (u_int)maxsize : (u_int)size);
162}
163
164/*
165 * Find the appropriate address buffer size
166 */
167u_int
168__rpc_get_a_size(int af)
169{
170	switch (af) {
171	case AF_INET:
172		return sizeof (struct sockaddr_in);
173#ifdef INET6
174	case AF_INET6:
175		return sizeof (struct sockaddr_in6);
176#endif
177	case AF_LOCAL:
178		return sizeof (struct sockaddr_un);
179	default:
180		break;
181	}
182	return ((u_int)RPC_MAXADDRSIZE);
183}
184
185#if 0
186static char *
187strlocase(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(const char *nettype)
204{
205	int i;
206
207	if ((nettype == NULL) || (nettype[0] == 0)) {
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
221static thread_key_t tcp_key, udp_key;
222static once_t keys_once = ONCE_INITIALIZER;
223static int tcp_key_error, udp_key_error;
224
225static void
226keys_init(void)
227{
228
229	tcp_key_error = thr_keycreate(&tcp_key, free);
230	udp_key_error = thr_keycreate(&udp_key, free);
231}
232
233/*
234 * For the given nettype (tcp or udp only), return the first structure found.
235 * This should be freed by calling freenetconfigent()
236 */
237struct netconfig *
238__rpc_getconfip(const char *nettype)
239{
240	char *netid;
241	char *netid_tcp = (char *) NULL;
242	char *netid_udp = (char *) NULL;
243	static char *netid_tcp_main;
244	static char *netid_udp_main;
245	struct netconfig *dummy;
246	int main_thread;
247
248	if ((main_thread = thr_main())) {
249		netid_udp = netid_udp_main;
250		netid_tcp = netid_tcp_main;
251	} else {
252		if (thr_once(&keys_once, keys_init) != 0 ||
253		    tcp_key_error != 0 || udp_key_error != 0)
254			return (NULL);
255		netid_tcp = (char *)thr_getspecific(tcp_key);
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 == NULL) {
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 == NULL) {
279					netid_udp = strdup(nconf->nc_netid);
280					if (main_thread)
281						netid_udp_main = netid_udp;
282					else
283						thr_setspecific(udp_key,
284						(void *) netid_udp);
285				}
286			}
287		}
288		endnetconfig(confighandle);
289	}
290	if (strcmp(nettype, "udp") == 0)
291		netid = netid_udp;
292	else if (strcmp(nettype, "tcp") == 0)
293		netid = netid_tcp;
294	else {
295		return (NULL);
296	}
297	if ((netid == NULL) || (netid[0] == 0)) {
298		return (NULL);
299	}
300	dummy = getnetconfigent(netid);
301	return (dummy);
302}
303
304/*
305 * Returns the type of the nettype, which should then be used with
306 * __rpc_getconf().
307 */
308void *
309__rpc_setconf(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			goto failed;
323		handle->nflag = TRUE;
324		break;
325	case _RPC_VISIBLE:
326	case _RPC_CIRCUIT_V:
327	case _RPC_DATAGRAM_V:
328	case _RPC_TCP:
329	case _RPC_UDP:
330		if (!(handle->nhandle = setnetconfig())) {
331		        syslog (LOG_ERR, "rpc: failed to open " NETCONFIG);
332			goto failed;
333		}
334		handle->nflag = FALSE;
335		break;
336	default:
337		goto failed;
338	}
339
340	return (handle);
341
342failed:
343	free(handle);
344	return (NULL);
345}
346
347/*
348 * Returns the next netconfig struct for the given "net" type.
349 * __rpc_setconf() should have been called previously.
350 */
351struct netconfig *
352__rpc_getconf(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(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(CLIENT *clnt)
450{
451	struct timeval TIMEOUT = {25, 0};
452
453	if (clnt_call(clnt, NULLPROC, (xdrproc_t) xdr_void, NULL,
454		(xdrproc_t) xdr_void, NULL, TIMEOUT) != RPC_SUCCESS) {
455		return (NULL);
456	}
457	return ((void *) clnt);
458}
459
460/*
461 * Try all possible transports until
462 * one succeeds in finding the netconf for the given fd.
463 */
464struct netconfig *
465__rpcgettp(int fd)
466{
467	const char *netid;
468	struct __rpc_sockinfo si;
469
470	if (!__rpc_fd2sockinfo(fd, &si))
471		return NULL;
472
473	if (!__rpc_sockinfo2netid(&si, &netid))
474		return NULL;
475
476	/*LINTED const castaway*/
477	return getnetconfigent((char *)netid);
478}
479
480int
481__rpc_fd2sockinfo(int fd, struct __rpc_sockinfo *sip)
482{
483	socklen_t len;
484	int type, proto;
485	struct sockaddr_storage ss;
486
487	len = sizeof ss;
488	if (_getsockname(fd, (struct sockaddr *)(void *)&ss, &len) < 0)
489		return 0;
490	sip->si_alen = len;
491
492	len = sizeof type;
493	if (_getsockopt(fd, SOL_SOCKET, SO_TYPE, &type, &len) < 0)
494		return 0;
495
496	/* XXX */
497	if (ss.ss_family != AF_LOCAL) {
498		if (type == SOCK_STREAM)
499			proto = IPPROTO_TCP;
500		else if (type == SOCK_DGRAM)
501			proto = IPPROTO_UDP;
502		else
503			return 0;
504	} else
505		proto = 0;
506
507	sip->si_af = ss.ss_family;
508	sip->si_proto = proto;
509	sip->si_socktype = type;
510
511	return 1;
512}
513
514/*
515 * Linear search, but the number of entries is small.
516 */
517int
518__rpc_nconf2sockinfo(const struct netconfig *nconf, struct __rpc_sockinfo *sip)
519{
520	int i;
521
522	for (i = 0; i < (sizeof na_cvt) / (sizeof (struct netid_af)); i++)
523		if (strcmp(na_cvt[i].netid, nconf->nc_netid) == 0 || (
524		    strcmp(nconf->nc_netid, "unix") == 0 &&
525		    strcmp(na_cvt[i].netid, "local") == 0)) {
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	struct netconfig *nconf;
555
556	nconf = getnetconfigent("local");
557
558	for (i = 0; i < (sizeof na_cvt) / (sizeof (struct netid_af)); i++) {
559		if (na_cvt[i].af == sip->si_af &&
560		    na_cvt[i].protocol == sip->si_proto) {
561			if (strcmp(na_cvt[i].netid, "local") == 0 && nconf == NULL) {
562				if (netid)
563					*netid = "unix";
564			} else {
565				if (netid)
566					*netid = na_cvt[i].netid;
567			}
568			if (nconf != NULL)
569				freenetconfigent(nconf);
570			return 1;
571		}
572	}
573	if (nconf != NULL)
574		freenetconfigent(nconf);
575
576	return 0;
577}
578
579char *
580taddr2uaddr(const struct netconfig *nconf, const struct netbuf *nbuf)
581{
582	struct __rpc_sockinfo si;
583
584	if (!__rpc_nconf2sockinfo(nconf, &si))
585		return NULL;
586	return __rpc_taddr2uaddr_af(si.si_af, nbuf);
587}
588
589struct netbuf *
590uaddr2taddr(const struct netconfig *nconf, const char *uaddr)
591{
592	struct __rpc_sockinfo si;
593
594	if (!__rpc_nconf2sockinfo(nconf, &si))
595		return NULL;
596	return __rpc_uaddr2taddr_af(si.si_af, uaddr);
597}
598
599char *
600__rpc_taddr2uaddr_af(int af, const struct netbuf *nbuf)
601{
602	char *ret;
603	struct sockaddr_in *sin;
604	struct sockaddr_un *sun;
605	char namebuf[INET_ADDRSTRLEN];
606#ifdef INET6
607	struct sockaddr_in6 *sin6;
608	char namebuf6[INET6_ADDRSTRLEN];
609#endif
610	u_int16_t port;
611
612	switch (af) {
613	case AF_INET:
614		if (nbuf->len < sizeof(*sin))
615			return NULL;
616		sin = nbuf->buf;
617		if (inet_ntop(af, &sin->sin_addr, namebuf, sizeof namebuf)
618		    == NULL)
619			return NULL;
620		port = ntohs(sin->sin_port);
621		if (asprintf(&ret, "%s.%u.%u", namebuf, ((u_int32_t)port) >> 8,
622		    port & 0xff) < 0)
623			return NULL;
624		break;
625#ifdef INET6
626	case AF_INET6:
627		if (nbuf->len < sizeof(*sin6))
628			return NULL;
629		sin6 = nbuf->buf;
630		if (inet_ntop(af, &sin6->sin6_addr, namebuf6, sizeof namebuf6)
631		    == NULL)
632			return NULL;
633		port = ntohs(sin6->sin6_port);
634		if (asprintf(&ret, "%s.%u.%u", namebuf6, ((u_int32_t)port) >> 8,
635		    port & 0xff) < 0)
636			return NULL;
637		break;
638#endif
639	case AF_LOCAL:
640		sun = nbuf->buf;
641		if (asprintf(&ret, "%.*s", (int)(sun->sun_len -
642		    offsetof(struct sockaddr_un, sun_path)),
643		    sun->sun_path) < 0)
644			return (NULL);
645		break;
646	default:
647		return NULL;
648	}
649
650	return ret;
651}
652
653struct netbuf *
654__rpc_uaddr2taddr_af(int af, const char *uaddr)
655{
656	struct netbuf *ret = NULL;
657	char *addrstr, *p;
658	unsigned port, portlo, porthi;
659	struct sockaddr_in *sin;
660#ifdef INET6
661	struct sockaddr_in6 *sin6;
662#endif
663	struct sockaddr_un *sun;
664
665	port = 0;
666	sin = NULL;
667
668	if (uaddr == NULL)
669		return NULL;
670
671	addrstr = strdup(uaddr);
672	if (addrstr == NULL)
673		return NULL;
674
675	/*
676	 * AF_LOCAL addresses are expected to be absolute
677	 * pathnames, anything else will be AF_INET or AF_INET6.
678	 */
679	if (*addrstr != '/') {
680		p = strrchr(addrstr, '.');
681		if (p == NULL)
682			goto out;
683		portlo = (unsigned)atoi(p + 1);
684		*p = '\0';
685
686		p = strrchr(addrstr, '.');
687		if (p == NULL)
688			goto out;
689		porthi = (unsigned)atoi(p + 1);
690		*p = '\0';
691		port = (porthi << 8) | portlo;
692	}
693
694	ret = (struct netbuf *)malloc(sizeof *ret);
695	if (ret == NULL)
696		goto out;
697
698	switch (af) {
699	case AF_INET:
700		sin = (struct sockaddr_in *)malloc(sizeof *sin);
701		if (sin == NULL)
702			goto out;
703		memset(sin, 0, sizeof *sin);
704		sin->sin_family = AF_INET;
705		sin->sin_port = htons(port);
706		if (inet_pton(AF_INET, addrstr, &sin->sin_addr) <= 0) {
707			free(sin);
708			free(ret);
709			ret = NULL;
710			goto out;
711		}
712		sin->sin_len = ret->maxlen = ret->len = sizeof *sin;
713		ret->buf = sin;
714		break;
715#ifdef INET6
716	case AF_INET6:
717		sin6 = (struct sockaddr_in6 *)malloc(sizeof *sin6);
718		if (sin6 == NULL)
719			goto out;
720		memset(sin6, 0, sizeof *sin6);
721		sin6->sin6_family = AF_INET6;
722		sin6->sin6_port = htons(port);
723		if (inet_pton(AF_INET6, addrstr, &sin6->sin6_addr) <= 0) {
724			free(sin6);
725			free(ret);
726			ret = NULL;
727			goto out;
728		}
729		sin6->sin6_len = ret->maxlen = ret->len = sizeof *sin6;
730		ret->buf = sin6;
731		break;
732#endif
733	case AF_LOCAL:
734		sun = (struct sockaddr_un *)malloc(sizeof *sun);
735		if (sun == NULL)
736			goto out;
737		memset(sun, 0, sizeof *sun);
738		sun->sun_family = AF_LOCAL;
739		strncpy(sun->sun_path, addrstr, sizeof(sun->sun_path) - 1);
740		ret->len = ret->maxlen = sun->sun_len = SUN_LEN(sun);
741		ret->buf = sun;
742		break;
743	default:
744		break;
745	}
746out:
747	free(addrstr);
748	return ret;
749}
750
751int
752__rpc_seman2socktype(int semantics)
753{
754	switch (semantics) {
755	case NC_TPI_CLTS:
756		return SOCK_DGRAM;
757	case NC_TPI_COTS_ORD:
758		return SOCK_STREAM;
759	case NC_TPI_RAW:
760		return SOCK_RAW;
761	default:
762		break;
763	}
764
765	return -1;
766}
767
768int
769__rpc_socktype2seman(int socktype)
770{
771	switch (socktype) {
772	case SOCK_DGRAM:
773		return NC_TPI_CLTS;
774	case SOCK_STREAM:
775		return NC_TPI_COTS_ORD;
776	case SOCK_RAW:
777		return NC_TPI_RAW;
778	default:
779		break;
780	}
781
782	return -1;
783}
784
785/*
786 * XXXX - IPv6 scope IDs can't be handled in universal addresses.
787 * Here, we compare the original server address to that of the RPC
788 * service we just received back from a call to rpcbind on the remote
789 * machine. If they are both "link local" or "site local", copy
790 * the scope id of the server address over to the service address.
791 */
792int
793__rpc_fixup_addr(struct netbuf *new, const struct netbuf *svc)
794{
795#ifdef INET6
796	struct sockaddr *sa_new, *sa_svc;
797	struct sockaddr_in6 *sin6_new, *sin6_svc;
798
799	sa_svc = (struct sockaddr *)svc->buf;
800	sa_new = (struct sockaddr *)new->buf;
801
802	if (sa_new->sa_family == sa_svc->sa_family &&
803	    sa_new->sa_family == AF_INET6) {
804		sin6_new = (struct sockaddr_in6 *)new->buf;
805		sin6_svc = (struct sockaddr_in6 *)svc->buf;
806
807		if ((IN6_IS_ADDR_LINKLOCAL(&sin6_new->sin6_addr) &&
808		     IN6_IS_ADDR_LINKLOCAL(&sin6_svc->sin6_addr)) ||
809		    (IN6_IS_ADDR_SITELOCAL(&sin6_new->sin6_addr) &&
810		     IN6_IS_ADDR_SITELOCAL(&sin6_svc->sin6_addr))) {
811			sin6_new->sin6_scope_id = sin6_svc->sin6_scope_id;
812		}
813	}
814#endif
815	return 1;
816}
817
818int
819__rpc_sockisbound(int fd)
820{
821	struct sockaddr_storage ss;
822	socklen_t slen;
823
824	slen = sizeof (struct sockaddr_storage);
825	if (_getsockname(fd, (struct sockaddr *)(void *)&ss, &slen) < 0)
826		return 0;
827
828	switch (ss.ss_family) {
829		case AF_INET:
830			return (((struct sockaddr_in *)
831			    (void *)&ss)->sin_port != 0);
832#ifdef INET6
833		case AF_INET6:
834			return (((struct sockaddr_in6 *)
835			    (void *)&ss)->sin6_port != 0);
836#endif
837		case AF_LOCAL:
838			/* XXX check this */
839			return (((struct sockaddr_un *)
840			    (void *)&ss)->sun_path[0] != '\0');
841		default:
842			break;
843	}
844
845	return 0;
846}
847