FreeBSD/Linux Kernel Cross Reference
sys/rpc/rpc_generic.c
1 /* $NetBSD: rpc_generic.c,v 1.4 2000/09/28 09:07:04 kleink Exp $ */
2
3 /*
4 * Sun RPC is a product of Sun Microsystems, Inc. and is provided for
5 * unrestricted use provided that this legend is included on all tape
6 * media and as a part of the software program in whole or part. Users
7 * may copy or modify Sun RPC without charge, but are not authorized
8 * to license or distribute it to anyone else except as part of a product or
9 * program developed by the user.
10 *
11 * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
12 * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
13 * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
14 *
15 * Sun RPC is provided with no support and without any obligation on the
16 * part of Sun Microsystems, Inc. to assist in its use, correction,
17 * modification or enhancement.
18 *
19 * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
20 * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
21 * OR ANY PART THEREOF.
22 *
23 * In no event will Sun Microsystems, Inc. be liable for any lost revenue
24 * or profits or other special, indirect and consequential damages, even if
25 * Sun has been advised of the possibility of such damages.
26 *
27 * Sun Microsystems, Inc.
28 * 2550 Garcia Avenue
29 * Mountain View, California 94043
30 */
31 /*
32 * Copyright (c) 1986-1991 by Sun Microsystems Inc.
33 */
34
35 /* #pragma ident "@(#)rpc_generic.c 1.17 94/04/24 SMI" */
36 #include <sys/cdefs.h>
37 __FBSDID("$FreeBSD: releng/8.1/sys/rpc/rpc_generic.c 199583 2009-11-20 15:27:52Z jhb $");
38
39 /*
40 * rpc_generic.c, Miscl routines for RPC.
41 *
42 */
43
44 #include "opt_inet6.h"
45
46 #include <sys/param.h>
47 #include <sys/kernel.h>
48 #include <sys/malloc.h>
49 #include <sys/mbuf.h>
50 #include <sys/module.h>
51 #include <sys/proc.h>
52 #include <sys/protosw.h>
53 #include <sys/sbuf.h>
54 #include <sys/systm.h>
55 #include <sys/socket.h>
56 #include <sys/socketvar.h>
57 #include <sys/syslog.h>
58
59 #include <net/vnet.h>
60
61 #include <rpc/rpc.h>
62 #include <rpc/nettype.h>
63
64 #include <rpc/rpc_com.h>
65
66 #if __FreeBSD_version < 700000
67 #define strrchr rindex
68 #endif
69
70 struct handle {
71 NCONF_HANDLE *nhandle;
72 int nflag; /* Whether NETPATH or NETCONFIG */
73 int nettype;
74 };
75
76 static const struct _rpcnettype {
77 const char *name;
78 const int type;
79 } _rpctypelist[] = {
80 { "netpath", _RPC_NETPATH },
81 { "visible", _RPC_VISIBLE },
82 { "circuit_v", _RPC_CIRCUIT_V },
83 { "datagram_v", _RPC_DATAGRAM_V },
84 { "circuit_n", _RPC_CIRCUIT_N },
85 { "datagram_n", _RPC_DATAGRAM_N },
86 { "tcp", _RPC_TCP },
87 { "udp", _RPC_UDP },
88 { 0, _RPC_NONE }
89 };
90
91 struct netid_af {
92 const char *netid;
93 int af;
94 int protocol;
95 };
96
97 static const struct netid_af na_cvt[] = {
98 { "udp", AF_INET, IPPROTO_UDP },
99 { "tcp", AF_INET, IPPROTO_TCP },
100 #ifdef INET6
101 { "udp6", AF_INET6, IPPROTO_UDP },
102 { "tcp6", AF_INET6, IPPROTO_TCP },
103 #endif
104 { "local", AF_LOCAL, 0 }
105 };
106
107 struct rpc_createerr rpc_createerr;
108
109 /*
110 * Find the appropriate buffer size
111 */
112 u_int
113 /*ARGSUSED*/
114 __rpc_get_t_size(int af, int proto, int size)
115 {
116 int maxsize, defsize;
117
118 maxsize = 256 * 1024; /* XXX */
119 switch (proto) {
120 case IPPROTO_TCP:
121 defsize = 64 * 1024; /* XXX */
122 break;
123 case IPPROTO_UDP:
124 defsize = UDPMSGSIZE;
125 break;
126 default:
127 defsize = RPC_MAXDATASIZE;
128 break;
129 }
130 if (size == 0)
131 return defsize;
132
133 /* Check whether the value is within the upper max limit */
134 return (size > maxsize ? (u_int)maxsize : (u_int)size);
135 }
136
137 /*
138 * Find the appropriate address buffer size
139 */
140 u_int
141 __rpc_get_a_size(af)
142 int af;
143 {
144 switch (af) {
145 case AF_INET:
146 return sizeof (struct sockaddr_in);
147 #ifdef INET6
148 case AF_INET6:
149 return sizeof (struct sockaddr_in6);
150 #endif
151 case AF_LOCAL:
152 return sizeof (struct sockaddr_un);
153 default:
154 break;
155 }
156 return ((u_int)RPC_MAXADDRSIZE);
157 }
158
159 #if 0
160
161 /*
162 * Used to ping the NULL procedure for clnt handle.
163 * Returns NULL if fails, else a non-NULL pointer.
164 */
165 void *
166 rpc_nullproc(clnt)
167 CLIENT *clnt;
168 {
169 struct timeval TIMEOUT = {25, 0};
170
171 if (clnt_call(clnt, NULLPROC, (xdrproc_t) xdr_void, NULL,
172 (xdrproc_t) xdr_void, NULL, TIMEOUT) != RPC_SUCCESS) {
173 return (NULL);
174 }
175 return ((void *) clnt);
176 }
177
178 #endif
179
180 int
181 __rpc_socket2sockinfo(struct socket *so, struct __rpc_sockinfo *sip)
182 {
183 int type, proto;
184 struct sockaddr *sa;
185 sa_family_t family;
186 struct sockopt opt;
187 int error;
188
189 error = so->so_proto->pr_usrreqs->pru_sockaddr(so, &sa);
190 if (error)
191 return 0;
192
193 sip->si_alen = sa->sa_len;
194 family = sa->sa_family;
195 free(sa, M_SONAME);
196
197 opt.sopt_dir = SOPT_GET;
198 opt.sopt_level = SOL_SOCKET;
199 opt.sopt_name = SO_TYPE;
200 opt.sopt_val = &type;
201 opt.sopt_valsize = sizeof type;
202 opt.sopt_td = NULL;
203 error = sogetopt(so, &opt);
204 if (error)
205 return 0;
206
207 /* XXX */
208 if (family != AF_LOCAL) {
209 if (type == SOCK_STREAM)
210 proto = IPPROTO_TCP;
211 else if (type == SOCK_DGRAM)
212 proto = IPPROTO_UDP;
213 else
214 return 0;
215 } else
216 proto = 0;
217
218 sip->si_af = family;
219 sip->si_proto = proto;
220 sip->si_socktype = type;
221
222 return 1;
223 }
224
225 /*
226 * Linear search, but the number of entries is small.
227 */
228 int
229 __rpc_nconf2sockinfo(const struct netconfig *nconf, struct __rpc_sockinfo *sip)
230 {
231 int i;
232
233 for (i = 0; i < (sizeof na_cvt) / (sizeof (struct netid_af)); i++)
234 if (strcmp(na_cvt[i].netid, nconf->nc_netid) == 0 || (
235 strcmp(nconf->nc_netid, "unix") == 0 &&
236 strcmp(na_cvt[i].netid, "local") == 0)) {
237 sip->si_af = na_cvt[i].af;
238 sip->si_proto = na_cvt[i].protocol;
239 sip->si_socktype =
240 __rpc_seman2socktype((int)nconf->nc_semantics);
241 if (sip->si_socktype == -1)
242 return 0;
243 sip->si_alen = __rpc_get_a_size(sip->si_af);
244 return 1;
245 }
246
247 return 0;
248 }
249
250 struct socket *
251 __rpc_nconf2socket(const struct netconfig *nconf)
252 {
253 struct __rpc_sockinfo si;
254 struct socket *so;
255 int error;
256
257 if (!__rpc_nconf2sockinfo(nconf, &si))
258 return 0;
259
260 so = NULL;
261 error = socreate(si.si_af, &so, si.si_socktype, si.si_proto,
262 curthread->td_ucred, curthread);
263
264 if (error)
265 return NULL;
266 else
267 return so;
268 }
269
270 char *
271 taddr2uaddr(const struct netconfig *nconf, const struct netbuf *nbuf)
272 {
273 struct __rpc_sockinfo si;
274
275 if (!__rpc_nconf2sockinfo(nconf, &si))
276 return NULL;
277 return __rpc_taddr2uaddr_af(si.si_af, nbuf);
278 }
279
280 struct netbuf *
281 uaddr2taddr(const struct netconfig *nconf, const char *uaddr)
282 {
283 struct __rpc_sockinfo si;
284
285 if (!__rpc_nconf2sockinfo(nconf, &si))
286 return NULL;
287 return __rpc_uaddr2taddr_af(si.si_af, uaddr);
288 }
289
290 char *
291 __rpc_taddr2uaddr_af(int af, const struct netbuf *nbuf)
292 {
293 char *ret;
294 struct sbuf sb;
295 struct sockaddr_in *sin;
296 struct sockaddr_un *sun;
297 char namebuf[INET_ADDRSTRLEN];
298 #ifdef INET6
299 struct sockaddr_in6 *sin6;
300 char namebuf6[INET6_ADDRSTRLEN];
301 #endif
302 u_int16_t port;
303
304 sbuf_new(&sb, NULL, 0, SBUF_AUTOEXTEND);
305
306 switch (af) {
307 case AF_INET:
308 sin = nbuf->buf;
309 if (__rpc_inet_ntop(af, &sin->sin_addr, namebuf, sizeof namebuf)
310 == NULL)
311 return NULL;
312 port = ntohs(sin->sin_port);
313 if (sbuf_printf(&sb, "%s.%u.%u", namebuf,
314 ((uint32_t)port) >> 8,
315 port & 0xff) < 0)
316 return NULL;
317 break;
318 #ifdef INET6
319 case AF_INET6:
320 sin6 = nbuf->buf;
321 if (__rpc_inet_ntop(af, &sin6->sin6_addr, namebuf6, sizeof namebuf6)
322 == NULL)
323 return NULL;
324 port = ntohs(sin6->sin6_port);
325 if (sbuf_printf(&sb, "%s.%u.%u", namebuf6,
326 ((uint32_t)port) >> 8,
327 port & 0xff) < 0)
328 return NULL;
329 break;
330 #endif
331 case AF_LOCAL:
332 sun = nbuf->buf;
333 if (sbuf_printf(&sb, "%.*s", (int)(sun->sun_len -
334 offsetof(struct sockaddr_un, sun_path)),
335 sun->sun_path) < 0)
336 return (NULL);
337 break;
338 default:
339 return NULL;
340 }
341
342 sbuf_finish(&sb);
343 ret = strdup(sbuf_data(&sb), M_RPC);
344 sbuf_delete(&sb);
345
346 return ret;
347 }
348
349 struct netbuf *
350 __rpc_uaddr2taddr_af(int af, const char *uaddr)
351 {
352 struct netbuf *ret = NULL;
353 char *addrstr, *p;
354 unsigned port, portlo, porthi;
355 struct sockaddr_in *sin;
356 #ifdef INET6
357 struct sockaddr_in6 *sin6;
358 #endif
359 struct sockaddr_un *sun;
360
361 port = 0;
362 sin = NULL;
363 addrstr = strdup(uaddr, M_RPC);
364 if (addrstr == NULL)
365 return NULL;
366
367 /*
368 * AF_LOCAL addresses are expected to be absolute
369 * pathnames, anything else will be AF_INET or AF_INET6.
370 */
371 if (*addrstr != '/') {
372 p = strrchr(addrstr, '.');
373 if (p == NULL)
374 goto out;
375 portlo = (unsigned)strtol(p + 1, NULL, 10);
376 *p = '\0';
377
378 p = strrchr(addrstr, '.');
379 if (p == NULL)
380 goto out;
381 porthi = (unsigned)strtol(p + 1, NULL, 10);
382 *p = '\0';
383 port = (porthi << 8) | portlo;
384 }
385
386 ret = (struct netbuf *)malloc(sizeof *ret, M_RPC, M_WAITOK);
387 if (ret == NULL)
388 goto out;
389
390 switch (af) {
391 case AF_INET:
392 sin = (struct sockaddr_in *)malloc(sizeof *sin, M_RPC,
393 M_WAITOK);
394 if (sin == NULL)
395 goto out;
396 memset(sin, 0, sizeof *sin);
397 sin->sin_family = AF_INET;
398 sin->sin_port = htons(port);
399 if (__rpc_inet_pton(AF_INET, addrstr, &sin->sin_addr) <= 0) {
400 free(sin, M_RPC);
401 free(ret, M_RPC);
402 ret = NULL;
403 goto out;
404 }
405 sin->sin_len = ret->maxlen = ret->len = sizeof *sin;
406 ret->buf = sin;
407 break;
408 #ifdef INET6
409 case AF_INET6:
410 sin6 = (struct sockaddr_in6 *)malloc(sizeof *sin6, M_RPC,
411 M_WAITOK);
412 if (sin6 == NULL)
413 goto out;
414 memset(sin6, 0, sizeof *sin6);
415 sin6->sin6_family = AF_INET6;
416 sin6->sin6_port = htons(port);
417 if (__rpc_inet_pton(AF_INET6, addrstr, &sin6->sin6_addr) <= 0) {
418 free(sin6, M_RPC);
419 free(ret, M_RPC);
420 ret = NULL;
421 goto out;
422 }
423 sin6->sin6_len = ret->maxlen = ret->len = sizeof *sin6;
424 ret->buf = sin6;
425 break;
426 #endif
427 case AF_LOCAL:
428 sun = (struct sockaddr_un *)malloc(sizeof *sun, M_RPC,
429 M_WAITOK);
430 if (sun == NULL)
431 goto out;
432 memset(sun, 0, sizeof *sun);
433 sun->sun_family = AF_LOCAL;
434 strncpy(sun->sun_path, addrstr, sizeof(sun->sun_path) - 1);
435 ret->len = ret->maxlen = sun->sun_len = SUN_LEN(sun);
436 ret->buf = sun;
437 break;
438 default:
439 break;
440 }
441 out:
442 free(addrstr, M_RPC);
443 return ret;
444 }
445
446 int
447 __rpc_seman2socktype(int semantics)
448 {
449 switch (semantics) {
450 case NC_TPI_CLTS:
451 return SOCK_DGRAM;
452 case NC_TPI_COTS_ORD:
453 return SOCK_STREAM;
454 case NC_TPI_RAW:
455 return SOCK_RAW;
456 default:
457 break;
458 }
459
460 return -1;
461 }
462
463 int
464 __rpc_socktype2seman(int socktype)
465 {
466 switch (socktype) {
467 case SOCK_DGRAM:
468 return NC_TPI_CLTS;
469 case SOCK_STREAM:
470 return NC_TPI_COTS_ORD;
471 case SOCK_RAW:
472 return NC_TPI_RAW;
473 default:
474 break;
475 }
476
477 return -1;
478 }
479
480 /*
481 * Returns the type of the network as defined in <rpc/nettype.h>
482 * If nettype is NULL, it defaults to NETPATH.
483 */
484 static int
485 getnettype(const char *nettype)
486 {
487 int i;
488
489 if ((nettype == NULL) || (nettype[0] == 0)) {
490 return (_RPC_NETPATH); /* Default */
491 }
492
493 #if 0
494 nettype = strlocase(nettype);
495 #endif
496 for (i = 0; _rpctypelist[i].name; i++)
497 if (strcasecmp(nettype, _rpctypelist[i].name) == 0) {
498 return (_rpctypelist[i].type);
499 }
500 return (_rpctypelist[i].type);
501 }
502
503 /*
504 * For the given nettype (tcp or udp only), return the first structure found.
505 * This should be freed by calling freenetconfigent()
506 */
507 struct netconfig *
508 __rpc_getconfip(const char *nettype)
509 {
510 char *netid;
511 static char *netid_tcp = (char *) NULL;
512 static char *netid_udp = (char *) NULL;
513 struct netconfig *dummy;
514
515 if (!netid_udp && !netid_tcp) {
516 struct netconfig *nconf;
517 void *confighandle;
518
519 if (!(confighandle = setnetconfig())) {
520 log(LOG_ERR, "rpc: failed to open " NETCONFIG);
521 return (NULL);
522 }
523 while ((nconf = getnetconfig(confighandle)) != NULL) {
524 if (strcmp(nconf->nc_protofmly, NC_INET) == 0) {
525 if (strcmp(nconf->nc_proto, NC_TCP) == 0) {
526 netid_tcp = strdup(nconf->nc_netid,
527 M_RPC);
528 } else
529 if (strcmp(nconf->nc_proto, NC_UDP) == 0) {
530 netid_udp = strdup(nconf->nc_netid,
531 M_RPC);
532 }
533 }
534 }
535 endnetconfig(confighandle);
536 }
537 if (strcmp(nettype, "udp") == 0)
538 netid = netid_udp;
539 else if (strcmp(nettype, "tcp") == 0)
540 netid = netid_tcp;
541 else {
542 return (NULL);
543 }
544 if ((netid == NULL) || (netid[0] == 0)) {
545 return (NULL);
546 }
547 dummy = getnetconfigent(netid);
548 return (dummy);
549 }
550
551 /*
552 * Returns the type of the nettype, which should then be used with
553 * __rpc_getconf().
554 *
555 * For simplicity in the kernel, we don't support the NETPATH
556 * environment variable. We behave as userland would then NETPATH is
557 * unset, i.e. iterate over all visible entries in netconfig.
558 */
559 void *
560 __rpc_setconf(nettype)
561 const char *nettype;
562 {
563 struct handle *handle;
564
565 handle = (struct handle *) malloc(sizeof (struct handle),
566 M_RPC, M_WAITOK);
567 switch (handle->nettype = getnettype(nettype)) {
568 case _RPC_NETPATH:
569 case _RPC_CIRCUIT_N:
570 case _RPC_DATAGRAM_N:
571 if (!(handle->nhandle = setnetconfig()))
572 goto failed;
573 handle->nflag = TRUE;
574 break;
575 case _RPC_VISIBLE:
576 case _RPC_CIRCUIT_V:
577 case _RPC_DATAGRAM_V:
578 case _RPC_TCP:
579 case _RPC_UDP:
580 if (!(handle->nhandle = setnetconfig())) {
581 log(LOG_ERR, "rpc: failed to open " NETCONFIG);
582 goto failed;
583 }
584 handle->nflag = FALSE;
585 break;
586 default:
587 goto failed;
588 }
589
590 return (handle);
591
592 failed:
593 free(handle, M_RPC);
594 return (NULL);
595 }
596
597 /*
598 * Returns the next netconfig struct for the given "net" type.
599 * __rpc_setconf() should have been called previously.
600 */
601 struct netconfig *
602 __rpc_getconf(void *vhandle)
603 {
604 struct handle *handle;
605 struct netconfig *nconf;
606
607 handle = (struct handle *)vhandle;
608 if (handle == NULL) {
609 return (NULL);
610 }
611 for (;;) {
612 if (handle->nflag) {
613 nconf = getnetconfig(handle->nhandle);
614 if (nconf && !(nconf->nc_flag & NC_VISIBLE))
615 continue;
616 } else {
617 nconf = getnetconfig(handle->nhandle);
618 }
619 if (nconf == NULL)
620 break;
621 if ((nconf->nc_semantics != NC_TPI_CLTS) &&
622 (nconf->nc_semantics != NC_TPI_COTS) &&
623 (nconf->nc_semantics != NC_TPI_COTS_ORD))
624 continue;
625 switch (handle->nettype) {
626 case _RPC_VISIBLE:
627 if (!(nconf->nc_flag & NC_VISIBLE))
628 continue;
629 /* FALLTHROUGH */
630 case _RPC_NETPATH: /* Be happy */
631 break;
632 case _RPC_CIRCUIT_V:
633 if (!(nconf->nc_flag & NC_VISIBLE))
634 continue;
635 /* FALLTHROUGH */
636 case _RPC_CIRCUIT_N:
637 if ((nconf->nc_semantics != NC_TPI_COTS) &&
638 (nconf->nc_semantics != NC_TPI_COTS_ORD))
639 continue;
640 break;
641 case _RPC_DATAGRAM_V:
642 if (!(nconf->nc_flag & NC_VISIBLE))
643 continue;
644 /* FALLTHROUGH */
645 case _RPC_DATAGRAM_N:
646 if (nconf->nc_semantics != NC_TPI_CLTS)
647 continue;
648 break;
649 case _RPC_TCP:
650 if (((nconf->nc_semantics != NC_TPI_COTS) &&
651 (nconf->nc_semantics != NC_TPI_COTS_ORD)) ||
652 (strcmp(nconf->nc_protofmly, NC_INET)
653 #ifdef INET6
654 && strcmp(nconf->nc_protofmly, NC_INET6))
655 #else
656 )
657 #endif
658 ||
659 strcmp(nconf->nc_proto, NC_TCP))
660 continue;
661 break;
662 case _RPC_UDP:
663 if ((nconf->nc_semantics != NC_TPI_CLTS) ||
664 (strcmp(nconf->nc_protofmly, NC_INET)
665 #ifdef INET6
666 && strcmp(nconf->nc_protofmly, NC_INET6))
667 #else
668 )
669 #endif
670 ||
671 strcmp(nconf->nc_proto, NC_UDP))
672 continue;
673 break;
674 }
675 break;
676 }
677 return (nconf);
678 }
679
680 void
681 __rpc_endconf(vhandle)
682 void * vhandle;
683 {
684 struct handle *handle;
685
686 handle = (struct handle *) vhandle;
687 if (handle == NULL) {
688 return;
689 }
690 endnetconfig(handle->nhandle);
691 free(handle, M_RPC);
692 }
693
694 int
695 __rpc_sockisbound(struct socket *so)
696 {
697 struct sockaddr *sa;
698 int error, bound;
699
700 error = so->so_proto->pr_usrreqs->pru_sockaddr(so, &sa);
701 if (error)
702 return (0);
703
704 switch (sa->sa_family) {
705 case AF_INET:
706 bound = (((struct sockaddr_in *) sa)->sin_port != 0);
707 break;
708 #ifdef INET6
709 case AF_INET6:
710 bound = (((struct sockaddr_in6 *) sa)->sin6_port != 0);
711 break;
712 #endif
713 case AF_LOCAL:
714 /* XXX check this */
715 bound = (((struct sockaddr_un *) sa)->sun_path[0] != '\0');
716 break;
717 default:
718 bound = FALSE;
719 break;
720 }
721
722 free(sa, M_SONAME);
723
724 return bound;
725 }
726
727 /*
728 * Implement XDR-style API for RPC call.
729 */
730 enum clnt_stat
731 clnt_call_private(
732 CLIENT *cl, /* client handle */
733 struct rpc_callextra *ext, /* call metadata */
734 rpcproc_t proc, /* procedure number */
735 xdrproc_t xargs, /* xdr routine for args */
736 void *argsp, /* pointer to args */
737 xdrproc_t xresults, /* xdr routine for results */
738 void *resultsp, /* pointer to results */
739 struct timeval utimeout) /* seconds to wait before giving up */
740 {
741 XDR xdrs;
742 struct mbuf *mreq;
743 struct mbuf *mrep;
744 enum clnt_stat stat;
745
746 MGET(mreq, M_WAIT, MT_DATA);
747 MCLGET(mreq, M_WAIT);
748 mreq->m_len = 0;
749
750 xdrmbuf_create(&xdrs, mreq, XDR_ENCODE);
751 if (!xargs(&xdrs, argsp)) {
752 m_freem(mreq);
753 return (RPC_CANTENCODEARGS);
754 }
755 XDR_DESTROY(&xdrs);
756
757 stat = CLNT_CALL_MBUF(cl, ext, proc, mreq, &mrep, utimeout);
758 m_freem(mreq);
759
760 if (stat == RPC_SUCCESS) {
761 xdrmbuf_create(&xdrs, mrep, XDR_DECODE);
762 if (!xresults(&xdrs, resultsp)) {
763 XDR_DESTROY(&xdrs);
764 return (RPC_CANTDECODERES);
765 }
766 XDR_DESTROY(&xdrs);
767 }
768
769 return (stat);
770 }
771
772 /*
773 * Bind a socket to a privileged IP port
774 */
775 int
776 bindresvport(struct socket *so, struct sockaddr *sa)
777 {
778 int old, error, af;
779 bool_t freesa = FALSE;
780 struct sockaddr_in *sin;
781 #ifdef INET6
782 struct sockaddr_in6 *sin6;
783 #endif
784 struct sockopt opt;
785 int proto, portrange, portlow;
786 u_int16_t *portp;
787 socklen_t salen;
788
789 if (sa == NULL) {
790 error = so->so_proto->pr_usrreqs->pru_sockaddr(so, &sa);
791 if (error)
792 return (error);
793 freesa = TRUE;
794 af = sa->sa_family;
795 salen = sa->sa_len;
796 memset(sa, 0, sa->sa_len);
797 } else {
798 af = sa->sa_family;
799 salen = sa->sa_len;
800 }
801
802 switch (af) {
803 case AF_INET:
804 proto = IPPROTO_IP;
805 portrange = IP_PORTRANGE;
806 portlow = IP_PORTRANGE_LOW;
807 sin = (struct sockaddr_in *)sa;
808 portp = &sin->sin_port;
809 break;
810 #ifdef INET6
811 case AF_INET6:
812 proto = IPPROTO_IPV6;
813 portrange = IPV6_PORTRANGE;
814 portlow = IPV6_PORTRANGE_LOW;
815 sin6 = (struct sockaddr_in6 *)sa;
816 portp = &sin6->sin6_port;
817 break;
818 #endif
819 default:
820 return (EPFNOSUPPORT);
821 }
822
823 sa->sa_family = af;
824 sa->sa_len = salen;
825
826 if (*portp == 0) {
827 CURVNET_SET(so->so_vnet);
828 bzero(&opt, sizeof(opt));
829 opt.sopt_dir = SOPT_GET;
830 opt.sopt_level = proto;
831 opt.sopt_name = portrange;
832 opt.sopt_val = &old;
833 opt.sopt_valsize = sizeof(old);
834 error = sogetopt(so, &opt);
835 if (error) {
836 CURVNET_RESTORE();
837 goto out;
838 }
839
840 opt.sopt_dir = SOPT_SET;
841 opt.sopt_val = &portlow;
842 error = sosetopt(so, &opt);
843 CURVNET_RESTORE();
844 if (error)
845 goto out;
846 }
847
848 error = sobind(so, sa, curthread);
849
850 if (*portp == 0) {
851 if (error) {
852 opt.sopt_dir = SOPT_SET;
853 opt.sopt_val = &old;
854 CURVNET_SET(so->so_vnet);
855 sosetopt(so, &opt);
856 CURVNET_RESTORE();
857 }
858 }
859 out:
860 if (freesa)
861 free(sa, M_SONAME);
862
863 return (error);
864 }
865
866 /*
867 * Kernel module glue
868 */
869 static int
870 krpc_modevent(module_t mod, int type, void *data)
871 {
872
873 return (0);
874 }
875 static moduledata_t krpc_mod = {
876 "krpc",
877 krpc_modevent,
878 NULL,
879 };
880 DECLARE_MODULE(krpc, krpc_mod, SI_SUB_VFS, SI_ORDER_ANY);
881
882 /* So that loader and kldload(2) can find us, wherever we are.. */
883 MODULE_VERSION(krpc, 1);
Cache object: 23ac05173c396c5b45dee2f4e0778e7d
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