1 /* $NetBSD: rpc_generic.c,v 1.4 2000/09/28 09:07:04 kleink Exp $ */
2
3 /*-
4 * Copyright (c) 2009, Sun Microsystems, Inc.
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions are met:
9 * - Redistributions of source code must retain the above copyright notice,
10 * this list of conditions and the following disclaimer.
11 * - Redistributions in binary form must reproduce the above copyright notice,
12 * this list of conditions and the following disclaimer in the documentation
13 * and/or other materials provided with the distribution.
14 * - Neither the name of Sun Microsystems, Inc. nor the names of its
15 * contributors may be used to endorse or promote products derived
16 * from this software without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
22 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
23 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
24 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
25 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
26 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
27 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
28 * POSSIBILITY OF SUCH DAMAGE.
29 */
30 /*
31 * Copyright (c) 1986-1991 by Sun Microsystems Inc.
32 */
33
34 /* #pragma ident "@(#)rpc_generic.c 1.17 94/04/24 SMI" */
35 #include <sys/cdefs.h>
36 __FBSDID("$FreeBSD$");
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 #include "mt_misc.h"
66
67 struct handle {
68 NCONF_HANDLE *nhandle;
69 int nflag; /* Whether NETPATH or NETCONFIG */
70 int nettype;
71 };
72
73 static const struct _rpcnettype {
74 const char *name;
75 const int type;
76 } _rpctypelist[] = {
77 { "netpath", _RPC_NETPATH },
78 { "visible", _RPC_VISIBLE },
79 { "circuit_v", _RPC_CIRCUIT_V },
80 { "datagram_v", _RPC_DATAGRAM_V },
81 { "circuit_n", _RPC_CIRCUIT_N },
82 { "datagram_n", _RPC_DATAGRAM_N },
83 { "tcp", _RPC_TCP },
84 { "udp", _RPC_UDP },
85 { 0, _RPC_NONE }
86 };
87
88 struct netid_af {
89 const char *netid;
90 int af;
91 int protocol;
92 };
93
94 static const struct netid_af na_cvt[] = {
95 { "udp", AF_INET, IPPROTO_UDP },
96 { "tcp", AF_INET, IPPROTO_TCP },
97 #ifdef INET6
98 { "udp6", AF_INET6, IPPROTO_UDP },
99 { "tcp6", AF_INET6, IPPROTO_TCP },
100 #endif
101 { "local", AF_LOCAL, 0 }
102 };
103
104 #if 0
105 static char *strlocase(char *);
106 #endif
107 static int getnettype(const char *);
108
109 /*
110 * Cache the result of getrlimit(), so we don't have to do an
111 * expensive call every time.
112 */
113 int
__rpc_dtbsize()114 __rpc_dtbsize()
115 {
116 static int tbsize;
117 struct rlimit rl;
118
119 if (tbsize) {
120 return (tbsize);
121 }
122 if (getrlimit(RLIMIT_NOFILE, &rl) == 0) {
123 return (tbsize = (int)rl.rlim_max);
124 }
125 /*
126 * Something wrong. I'll try to save face by returning a
127 * pessimistic number.
128 */
129 return (32);
130 }
131
132
133 /*
134 * Find the appropriate buffer size
135 */
136 u_int
137 /*ARGSUSED*/
__rpc_get_t_size(af,proto,size)138 __rpc_get_t_size(af, proto, size)
139 int af, proto;
140 int size; /* Size requested */
141 {
142 int maxsize, defsize;
143
144 maxsize = 256 * 1024; /* XXX */
145 switch (proto) {
146 case IPPROTO_TCP:
147 defsize = 64 * 1024; /* XXX */
148 break;
149 case IPPROTO_UDP:
150 defsize = UDPMSGSIZE;
151 break;
152 default:
153 defsize = RPC_MAXDATASIZE;
154 break;
155 }
156 if (size == 0)
157 return defsize;
158
159 /* Check whether the value is within the upper max limit */
160 return (size > maxsize ? (u_int)maxsize : (u_int)size);
161 }
162
163 /*
164 * Find the appropriate address buffer size
165 */
166 u_int
__rpc_get_a_size(af)167 __rpc_get_a_size(af)
168 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
186 static char *
187 strlocase(p)
188 char *p;
189 {
190 char *t = p;
191
192 for (; *p; p++)
193 if (isupper(*p))
194 *p = tolower(*p);
195 return (t);
196 }
197 #endif
198
199 /*
200 * Returns the type of the network as defined in <rpc/nettype.h>
201 * If nettype is NULL, it defaults to NETPATH.
202 */
203 static int
getnettype(nettype)204 getnettype(nettype)
205 const char *nettype;
206 {
207 int i;
208
209 if ((nettype == NULL) || (nettype[0] == 0)) {
210 return (_RPC_NETPATH); /* Default */
211 }
212
213 #if 0
214 nettype = strlocase(nettype);
215 #endif
216 for (i = 0; _rpctypelist[i].name; i++)
217 if (strcasecmp(nettype, _rpctypelist[i].name) == 0) {
218 return (_rpctypelist[i].type);
219 }
220 return (_rpctypelist[i].type);
221 }
222
223 static thread_key_t tcp_key, udp_key;
224 static once_t keys_once = ONCE_INITIALIZER;
225 static int tcp_key_error, udp_key_error;
226
227 static void
keys_init(void)228 keys_init(void)
229 {
230
231 tcp_key_error = thr_keycreate(&tcp_key, free);
232 udp_key_error = thr_keycreate(&udp_key, free);
233 }
234
235 /*
236 * For the given nettype (tcp or udp only), return the first structure found.
237 * This should be freed by calling freenetconfigent()
238 */
239 struct netconfig *
__rpc_getconfip(nettype)240 __rpc_getconfip(nettype)
241 const char *nettype;
242 {
243 char *netid;
244 char *netid_tcp = (char *) NULL;
245 char *netid_udp = (char *) NULL;
246 static char *netid_tcp_main;
247 static char *netid_udp_main;
248 struct netconfig *dummy;
249 int main_thread;
250
251 if ((main_thread = thr_main())) {
252 netid_udp = netid_udp_main;
253 netid_tcp = netid_tcp_main;
254 } else {
255 if (thr_once(&keys_once, keys_init) != 0 ||
256 tcp_key_error != 0 || udp_key_error != 0)
257 return (NULL);
258 netid_tcp = (char *)thr_getspecific(tcp_key);
259 netid_udp = (char *)thr_getspecific(udp_key);
260 }
261 if (!netid_udp && !netid_tcp) {
262 struct netconfig *nconf;
263 void *confighandle;
264
265 if (!(confighandle = setnetconfig())) {
266 syslog (LOG_ERR, "rpc: failed to open " NETCONFIG);
267 return (NULL);
268 }
269 while ((nconf = getnetconfig(confighandle)) != NULL) {
270 if (strcmp(nconf->nc_protofmly, NC_INET) == 0) {
271 if (strcmp(nconf->nc_proto, NC_TCP) == 0 &&
272 netid_tcp == NULL) {
273 netid_tcp = strdup(nconf->nc_netid);
274 if (main_thread)
275 netid_tcp_main = netid_tcp;
276 else
277 thr_setspecific(tcp_key,
278 (void *) netid_tcp);
279 } else
280 if (strcmp(nconf->nc_proto, NC_UDP) == 0 &&
281 netid_udp == NULL) {
282 netid_udp = strdup(nconf->nc_netid);
283 if (main_thread)
284 netid_udp_main = netid_udp;
285 else
286 thr_setspecific(udp_key,
287 (void *) netid_udp);
288 }
289 }
290 }
291 endnetconfig(confighandle);
292 }
293 if (strcmp(nettype, "udp") == 0)
294 netid = netid_udp;
295 else if (strcmp(nettype, "tcp") == 0)
296 netid = netid_tcp;
297 else {
298 return (NULL);
299 }
300 if ((netid == NULL) || (netid[0] == 0)) {
301 return (NULL);
302 }
303 dummy = getnetconfigent(netid);
304 return (dummy);
305 }
306
307 /*
308 * Returns the type of the nettype, which should then be used with
309 * __rpc_getconf().
310 */
311 void *
__rpc_setconf(nettype)312 __rpc_setconf(nettype)
313 const char *nettype;
314 {
315 struct handle *handle;
316
317 handle = (struct handle *) malloc(sizeof (struct handle));
318 if (handle == NULL) {
319 return (NULL);
320 }
321 switch (handle->nettype = getnettype(nettype)) {
322 case _RPC_NETPATH:
323 case _RPC_CIRCUIT_N:
324 case _RPC_DATAGRAM_N:
325 if (!(handle->nhandle = setnetpath()))
326 goto failed;
327 handle->nflag = TRUE;
328 break;
329 case _RPC_VISIBLE:
330 case _RPC_CIRCUIT_V:
331 case _RPC_DATAGRAM_V:
332 case _RPC_TCP:
333 case _RPC_UDP:
334 if (!(handle->nhandle = setnetconfig())) {
335 syslog (LOG_ERR, "rpc: failed to open " NETCONFIG);
336 goto failed;
337 }
338 handle->nflag = FALSE;
339 break;
340 default:
341 goto failed;
342 }
343
344 return (handle);
345
346 failed:
347 free(handle);
348 return (NULL);
349 }
350
351 /*
352 * Returns the next netconfig struct for the given "net" type.
353 * __rpc_setconf() should have been called previously.
354 */
355 struct netconfig *
__rpc_getconf(vhandle)356 __rpc_getconf(vhandle)
357 void *vhandle;
358 {
359 struct handle *handle;
360 struct netconfig *nconf;
361
362 handle = (struct handle *)vhandle;
363 if (handle == NULL) {
364 return (NULL);
365 }
366 for (;;) {
367 if (handle->nflag)
368 nconf = getnetpath(handle->nhandle);
369 else
370 nconf = getnetconfig(handle->nhandle);
371 if (nconf == NULL)
372 break;
373 if ((nconf->nc_semantics != NC_TPI_CLTS) &&
374 (nconf->nc_semantics != NC_TPI_COTS) &&
375 (nconf->nc_semantics != NC_TPI_COTS_ORD))
376 continue;
377 switch (handle->nettype) {
378 case _RPC_VISIBLE:
379 if (!(nconf->nc_flag & NC_VISIBLE))
380 continue;
381 /* FALLTHROUGH */
382 case _RPC_NETPATH: /* Be happy */
383 break;
384 case _RPC_CIRCUIT_V:
385 if (!(nconf->nc_flag & NC_VISIBLE))
386 continue;
387 /* FALLTHROUGH */
388 case _RPC_CIRCUIT_N:
389 if ((nconf->nc_semantics != NC_TPI_COTS) &&
390 (nconf->nc_semantics != NC_TPI_COTS_ORD))
391 continue;
392 break;
393 case _RPC_DATAGRAM_V:
394 if (!(nconf->nc_flag & NC_VISIBLE))
395 continue;
396 /* FALLTHROUGH */
397 case _RPC_DATAGRAM_N:
398 if (nconf->nc_semantics != NC_TPI_CLTS)
399 continue;
400 break;
401 case _RPC_TCP:
402 if (((nconf->nc_semantics != NC_TPI_COTS) &&
403 (nconf->nc_semantics != NC_TPI_COTS_ORD)) ||
404 (strcmp(nconf->nc_protofmly, NC_INET)
405 #ifdef INET6
406 && strcmp(nconf->nc_protofmly, NC_INET6))
407 #else
408 )
409 #endif
410 ||
411 strcmp(nconf->nc_proto, NC_TCP))
412 continue;
413 break;
414 case _RPC_UDP:
415 if ((nconf->nc_semantics != NC_TPI_CLTS) ||
416 (strcmp(nconf->nc_protofmly, NC_INET)
417 #ifdef INET6
418 && strcmp(nconf->nc_protofmly, NC_INET6))
419 #else
420 )
421 #endif
422 ||
423 strcmp(nconf->nc_proto, NC_UDP))
424 continue;
425 break;
426 }
427 break;
428 }
429 return (nconf);
430 }
431
432 void
__rpc_endconf(vhandle)433 __rpc_endconf(vhandle)
434 void * vhandle;
435 {
436 struct handle *handle;
437
438 handle = (struct handle *) vhandle;
439 if (handle == NULL) {
440 return;
441 }
442 if (handle->nflag) {
443 endnetpath(handle->nhandle);
444 } else {
445 endnetconfig(handle->nhandle);
446 }
447 free(handle);
448 }
449
450 /*
451 * Used to ping the NULL procedure for clnt handle.
452 * Returns NULL if fails, else a non-NULL pointer.
453 */
454 void *
rpc_nullproc(clnt)455 rpc_nullproc(clnt)
456 CLIENT *clnt;
457 {
458 struct timeval TIMEOUT = {25, 0};
459
460 if (clnt_call(clnt, NULLPROC, (xdrproc_t) xdr_void, NULL,
461 (xdrproc_t) xdr_void, NULL, TIMEOUT) != RPC_SUCCESS) {
462 return (NULL);
463 }
464 return ((void *) clnt);
465 }
466
467 /*
468 * Try all possible transports until
469 * one succeeds in finding the netconf for the given fd.
470 */
471 struct netconfig *
__rpcgettp(fd)472 __rpcgettp(fd)
473 int fd;
474 {
475 const char *netid;
476 struct __rpc_sockinfo si;
477
478 if (!__rpc_fd2sockinfo(fd, &si))
479 return NULL;
480
481 if (!__rpc_sockinfo2netid(&si, &netid))
482 return NULL;
483
484 /*LINTED const castaway*/
485 return getnetconfigent((char *)netid);
486 }
487
488 int
__rpc_fd2sockinfo(int fd,struct __rpc_sockinfo * sip)489 __rpc_fd2sockinfo(int fd, struct __rpc_sockinfo *sip)
490 {
491 socklen_t len;
492 int type, proto;
493 struct sockaddr_storage ss;
494
495 len = sizeof ss;
496 if (_getsockname(fd, (struct sockaddr *)(void *)&ss, &len) < 0)
497 return 0;
498 sip->si_alen = len;
499
500 len = sizeof type;
501 if (_getsockopt(fd, SOL_SOCKET, SO_TYPE, &type, &len) < 0)
502 return 0;
503
504 /* XXX */
505 if (ss.ss_family != AF_LOCAL) {
506 if (type == SOCK_STREAM)
507 proto = IPPROTO_TCP;
508 else if (type == SOCK_DGRAM)
509 proto = IPPROTO_UDP;
510 else
511 return 0;
512 } else
513 proto = 0;
514
515 sip->si_af = ss.ss_family;
516 sip->si_proto = proto;
517 sip->si_socktype = type;
518
519 return 1;
520 }
521
522 /*
523 * Linear search, but the number of entries is small.
524 */
525 int
__rpc_nconf2sockinfo(const struct netconfig * nconf,struct __rpc_sockinfo * sip)526 __rpc_nconf2sockinfo(const struct netconfig *nconf, struct __rpc_sockinfo *sip)
527 {
528 int i;
529
530 for (i = 0; i < (sizeof na_cvt) / (sizeof (struct netid_af)); i++)
531 if (strcmp(na_cvt[i].netid, nconf->nc_netid) == 0 || (
532 strcmp(nconf->nc_netid, "unix") == 0 &&
533 strcmp(na_cvt[i].netid, "local") == 0)) {
534 sip->si_af = na_cvt[i].af;
535 sip->si_proto = na_cvt[i].protocol;
536 sip->si_socktype =
537 __rpc_seman2socktype((int)nconf->nc_semantics);
538 if (sip->si_socktype == -1)
539 return 0;
540 sip->si_alen = __rpc_get_a_size(sip->si_af);
541 return 1;
542 }
543
544 return 0;
545 }
546
547 int
__rpc_nconf2fd(const struct netconfig * nconf)548 __rpc_nconf2fd(const struct netconfig *nconf)
549 {
550 struct __rpc_sockinfo si;
551
552 if (!__rpc_nconf2sockinfo(nconf, &si))
553 return 0;
554
555 return _socket(si.si_af, si.si_socktype, si.si_proto);
556 }
557
558 int
__rpc_sockinfo2netid(struct __rpc_sockinfo * sip,const char ** netid)559 __rpc_sockinfo2netid(struct __rpc_sockinfo *sip, const char **netid)
560 {
561 int i;
562 struct netconfig *nconf;
563
564 nconf = getnetconfigent("local");
565
566 for (i = 0; i < (sizeof na_cvt) / (sizeof (struct netid_af)); i++) {
567 if (na_cvt[i].af == sip->si_af &&
568 na_cvt[i].protocol == sip->si_proto) {
569 if (strcmp(na_cvt[i].netid, "local") == 0 && nconf == NULL) {
570 if (netid)
571 *netid = "unix";
572 } else {
573 if (netid)
574 *netid = na_cvt[i].netid;
575 }
576 if (nconf != NULL)
577 freenetconfigent(nconf);
578 return 1;
579 }
580 }
581 if (nconf != NULL)
582 freenetconfigent(nconf);
583
584 return 0;
585 }
586
587 char *
taddr2uaddr(const struct netconfig * nconf,const struct netbuf * nbuf)588 taddr2uaddr(const struct netconfig *nconf, const struct netbuf *nbuf)
589 {
590 struct __rpc_sockinfo si;
591
592 if (!__rpc_nconf2sockinfo(nconf, &si))
593 return NULL;
594 return __rpc_taddr2uaddr_af(si.si_af, nbuf);
595 }
596
597 struct netbuf *
uaddr2taddr(const struct netconfig * nconf,const char * uaddr)598 uaddr2taddr(const struct netconfig *nconf, const char *uaddr)
599 {
600 struct __rpc_sockinfo si;
601
602 if (!__rpc_nconf2sockinfo(nconf, &si))
603 return NULL;
604 return __rpc_uaddr2taddr_af(si.si_af, uaddr);
605 }
606
607 char *
__rpc_taddr2uaddr_af(int af,const struct netbuf * nbuf)608 __rpc_taddr2uaddr_af(int af, const struct netbuf *nbuf)
609 {
610 char *ret;
611 struct sockaddr_in *sin;
612 struct sockaddr_un *sun;
613 char namebuf[INET_ADDRSTRLEN];
614 #ifdef INET6
615 struct sockaddr_in6 *sin6;
616 char namebuf6[INET6_ADDRSTRLEN];
617 #endif
618 u_int16_t port;
619
620 switch (af) {
621 case AF_INET:
622 sin = nbuf->buf;
623 if (inet_ntop(af, &sin->sin_addr, namebuf, sizeof namebuf)
624 == NULL)
625 return NULL;
626 port = ntohs(sin->sin_port);
627 if (asprintf(&ret, "%s.%u.%u", namebuf, ((u_int32_t)port) >> 8,
628 port & 0xff) < 0)
629 return NULL;
630 break;
631 #ifdef INET6
632 case AF_INET6:
633 sin6 = nbuf->buf;
634 if (inet_ntop(af, &sin6->sin6_addr, namebuf6, sizeof namebuf6)
635 == NULL)
636 return NULL;
637 port = ntohs(sin6->sin6_port);
638 if (asprintf(&ret, "%s.%u.%u", namebuf6, ((u_int32_t)port) >> 8,
639 port & 0xff) < 0)
640 return NULL;
641 break;
642 #endif
643 case AF_LOCAL:
644 sun = nbuf->buf;
645 if (asprintf(&ret, "%.*s", (int)(sun->sun_len -
646 offsetof(struct sockaddr_un, sun_path)),
647 sun->sun_path) < 0)
648 return (NULL);
649 break;
650 default:
651 return NULL;
652 }
653
654 return ret;
655 }
656
657 struct netbuf *
__rpc_uaddr2taddr_af(int af,const char * uaddr)658 __rpc_uaddr2taddr_af(int af, const char *uaddr)
659 {
660 struct netbuf *ret = NULL;
661 char *addrstr, *p;
662 unsigned port, portlo, porthi;
663 struct sockaddr_in *sin;
664 #ifdef INET6
665 struct sockaddr_in6 *sin6;
666 #endif
667 struct sockaddr_un *sun;
668
669 port = 0;
670 sin = NULL;
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 }
746 out:
747 free(addrstr);
748 return ret;
749 }
750
751 int
__rpc_seman2socktype(int semantics)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
768 int
__rpc_socktype2seman(int socktype)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 */
792 int
__rpc_fixup_addr(struct netbuf * new,const struct netbuf * svc)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
818 int
__rpc_sockisbound(int fd)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