1 /* $OpenBSD: portmap.c,v 1.34 2005/05/22 21:19:39 henning Exp $ */
2
3 /*-
4 * Copyright (c) 1996, 1997 Theo de Raadt (OpenBSD). All rights reserved.
5 * Copyright (c) 1990 The Regents of the University of California.
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. Neither the name of the University nor the names of its contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21 * 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 REGENTS OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 */
32
33 #include <sys/cdefs.h>
34
35 __COPYRIGHT("@(#) Copyright (c) 1990 The Regents of the University of California.\n\
36 All rights reserved.\n");
37 __SCCSID("@(#)portmap.c 5.4 (Berkeley) 4/19/91");
38 __RCSID("$MirOS: src/usr.sbin/portmap/portmap.c,v 1.2 2012/09/02 21:06:52 tg Exp $");
39 __SCCSID("@(#)portmap.c 2.3 88/08/11 4.0 RPCSRC");
40 __SCCSID("@(#)portmap.c 1.32 87/08/06 Copyr 1984 Sun Micro");
41
42 /*
43 * portmap.c, Implements the program,version to port number mapping for
44 * rpc.
45 */
46
47 /*
48 * Sun RPC is a product of Sun Microsystems, Inc. and is provided for
49 * unrestricted use provided that this legend is included on all tape
50 * media and as a part of the software program in whole or part. Users
51 * may copy or modify Sun RPC without charge, but are not authorized
52 * to license or distribute it to anyone else except as part of a product or
53 * program developed by the user.
54 *
55 * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
56 * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
57 * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
58 *
59 * Sun RPC is provided with no support and without any obligation on the
60 * part of Sun Microsystems, Inc. to assist in its use, correction,
61 * modification or enhancement.
62 *
63 * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
64 * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
65 * OR ANY PART THEREOF.
66 *
67 * In no event will Sun Microsystems, Inc. be liable for any lost revenue
68 * or profits or other special, indirect and consequential damages, even if
69 * Sun has been advised of the possibility of such damages.
70 *
71 * Sun Microsystems, Inc.
72 * 2550 Garcia Avenue
73 * Mountain View, California 94043
74 */
75
76 #include <rpc/rpc.h>
77 #include <rpc/pmap_prot.h>
78 #include <stdio.h>
79 #include <stdlib.h>
80 #include <string.h>
81 #include <syslog.h>
82 #include <unistd.h>
83 #include <netdb.h>
84 #include <pwd.h>
85 #include <errno.h>
86 #include <sys/socket.h>
87 #include <sys/ioctl.h>
88 #include <sys/wait.h>
89 #include <sys/signal.h>
90 #include <sys/resource.h>
91 #include <rpcsvc/nfs_prot.h>
92 #include <arpa/inet.h>
93
94 void reg_service(struct svc_req *, SVCXPRT *);
95 void reap(int);
96 void callit(struct svc_req *, SVCXPRT *);
97 int check_callit(struct sockaddr_in *, u_long, u_long, u_long);
98
99 struct pmaplist *pmaplist;
100 int debugging = 0;
101
102 SVCXPRT *ludpxprt, *ltcpxprt;
103
104 int
main(int argc,char * argv[])105 main(int argc, char *argv[])
106 {
107 int sock, lsock, c, on = 1, len = sizeof(struct sockaddr_in);
108 struct sockaddr_in addr, laddr;
109 struct pmaplist *pml;
110 struct passwd *pw;
111 SVCXPRT *xprt;
112
113 while ((c = getopt(argc, argv, "d")) != -1) {
114 switch (c) {
115
116 case 'd':
117 debugging = 1;
118 break;
119
120 default:
121 (void) fprintf(stderr, "usage: %s [-d]\n", argv[0]);
122 exit(1);
123 }
124 }
125
126 if (!debugging && daemon(0, 0)) {
127 (void) fprintf(stderr, "portmap: fork: %s", strerror(errno));
128 exit(1);
129 }
130
131 openlog("portmap", LOG_NDELAY | (debugging ? LOG_PID | LOG_PERROR : LOG_PID),
132 LOG_DAEMON);
133
134 bzero((char *)&addr, sizeof addr);
135 addr.sin_addr.s_addr = 0;
136 addr.sin_family = AF_INET;
137 addr.sin_addr.s_addr = htonl(INADDR_ANY);
138 addr.sin_port = htons(PMAPPORT);
139
140 bzero((char *)&laddr, sizeof laddr);
141 laddr.sin_addr.s_addr = 0;
142 laddr.sin_family = AF_INET;
143 laddr.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
144 laddr.sin_port = htons(PMAPPORT);
145
146 if ((sock = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP)) < 0) {
147 syslog(LOG_ERR, "cannot create udp socket: %m");
148 exit(1);
149 }
150 setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, &on, sizeof on);
151 if (bind(sock, (struct sockaddr *)&addr, len) != 0) {
152 syslog(LOG_ERR, "cannot bind udp: %m");
153 exit(1);
154 }
155
156 if ((xprt = svcudp_create(sock)) == (SVCXPRT *)NULL) {
157 syslog(LOG_ERR, "couldn't do udp_create");
158 exit(1);
159 }
160
161 if ((lsock = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP)) < 0) {
162 syslog(LOG_ERR, "cannot create udp socket: %m");
163 exit(1);
164 }
165 setsockopt(lsock, SOL_SOCKET, SO_REUSEADDR, &on, sizeof on);
166 if (bind(lsock, (struct sockaddr *)&laddr, len) != 0) {
167 syslog(LOG_ERR, "cannot bind local udp: %m");
168 exit(1);
169 }
170
171 if ((ludpxprt = svcudp_create(lsock)) == (SVCXPRT *)NULL) {
172 syslog(LOG_ERR, "couldn't do udp_create");
173 exit(1);
174 }
175
176 /* make an entry for ourself */
177 pml = (struct pmaplist *)malloc((u_int)sizeof(struct pmaplist));
178 if (pml == NULL) {
179 syslog(LOG_ERR, "out of memory");
180 exit(1);
181 }
182 pml->pml_next = 0;
183 pml->pml_map.pm_prog = PMAPPROG;
184 pml->pml_map.pm_vers = PMAPVERS;
185 pml->pml_map.pm_prot = IPPROTO_UDP;
186 pml->pml_map.pm_port = PMAPPORT;
187 pmaplist = pml;
188
189 if ((sock = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP)) < 0) {
190 syslog(LOG_ERR, "cannot create tcp socket: %m");
191 exit(1);
192 }
193 setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, &on, sizeof on);
194 if (bind(sock, (struct sockaddr *)&addr, len) != 0) {
195 syslog(LOG_ERR, "cannot bind tcp: %m");
196 exit(1);
197 }
198 if ((xprt = svctcp_create(sock, RPCSMALLMSGSIZE, RPCSMALLMSGSIZE))
199 == (SVCXPRT *)NULL) {
200 syslog(LOG_ERR, "couldn't do tcp_create");
201 exit(1);
202 }
203
204 if ((lsock = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP)) < 0) {
205 syslog(LOG_ERR, "cannot create tcp socket: %m");
206 exit(1);
207 }
208 setsockopt(lsock, SOL_SOCKET, SO_REUSEADDR, &on, sizeof on);
209 if (bind(lsock, (struct sockaddr *)&laddr, len) != 0) {
210 syslog(LOG_ERR, "cannot bind tcp: %m");
211 exit(1);
212 }
213 if ((ltcpxprt = svctcp_create(lsock, RPCSMALLMSGSIZE,
214 RPCSMALLMSGSIZE)) == (SVCXPRT *)NULL) {
215 syslog(LOG_ERR, "couldn't do tcp_create");
216 exit(1);
217 }
218
219 /* make an entry for ourself */
220 pml = (struct pmaplist *)malloc((u_int)sizeof(struct pmaplist));
221 if (pml == NULL) {
222 syslog(LOG_ERR, "out of memory");
223 exit(1);
224 }
225 pml->pml_map.pm_prog = PMAPPROG;
226 pml->pml_map.pm_vers = PMAPVERS;
227 pml->pml_map.pm_prot = IPPROTO_TCP;
228 pml->pml_map.pm_port = PMAPPORT;
229 pml->pml_next = pmaplist;
230 pmaplist = pml;
231
232 pw = getpwnam("_portmap");
233 if (!pw)
234 pw = getpwnam("nobody");
235 if (chroot("/var/empty") == -1) {
236 syslog(LOG_ERR, "cannot chdir to /var/empty.");
237 exit(1);
238 }
239 chdir("/");
240 if (pw) {
241 if (setgroups(1, &pw->pw_gid) == -1 ||
242 setresgid(pw->pw_gid, pw->pw_gid, pw->pw_gid) == -1 ||
243 setresuid(pw->pw_uid, pw->pw_uid, pw->pw_uid) == -1) {
244 syslog(LOG_ERR, "revoke privs: %s", strerror(errno));
245 exit(1);
246 }
247 }
248 endpwent();
249
250 if (svc_register(xprt, PMAPPROG, PMAPVERS, reg_service, FALSE) == 0) {
251 syslog(LOG_ERR, "svc_register failed.");
252 exit(1);
253 }
254
255 (void)signal(SIGCHLD, (void (*)(int))reap);
256 svc_run();
257 syslog(LOG_ERR, "svc_run returned unexpectedly");
258 abort();
259 }
260
261 #ifndef lint
262 /* need to override perror calls in rpc library */
263 void
perror(const char * what)264 perror(const char *what)
265 {
266
267 syslog(LOG_ERR, "%s: %m", what);
268 }
269 #endif
270
271 struct pmaplist *
find_service(u_long prog,u_long vers,u_long prot)272 find_service(u_long prog, u_long vers, u_long prot)
273 {
274 struct pmaplist *hit = NULL;
275 struct pmaplist *pml;
276
277 for (pml = pmaplist; pml != NULL; pml = pml->pml_next) {
278 if ((pml->pml_map.pm_prog != prog) ||
279 (pml->pml_map.pm_prot != prot))
280 continue;
281 hit = pml;
282 if (pml->pml_map.pm_vers == vers)
283 break;
284 }
285 return (hit);
286 }
287
288 /*
289 * 1 OK, 0 not
290 */
291 void
reg_service(struct svc_req * rqstp,SVCXPRT * xprt)292 reg_service(struct svc_req *rqstp, SVCXPRT *xprt)
293 {
294 struct pmap reg;
295 struct pmaplist *pml, *prevpml, *fnd;
296 struct sockaddr_in *fromsin;
297 long ans = 0, port;
298 caddr_t t;
299
300 fromsin = svc_getcaller(xprt);
301
302 if (debugging)
303 (void) fprintf(stderr, "server: about to do a switch\n");
304 switch (rqstp->rq_proc) {
305
306 case PMAPPROC_NULL:
307 /*
308 * Null proc call
309 */
310 if (!svc_sendreply(xprt, xdr_void, (caddr_t)0) && debugging) {
311 abort();
312 }
313 break;
314
315 case PMAPPROC_SET:
316 /*
317 * Set a program,version to port mapping
318 */
319 if (xprt != ltcpxprt && xprt != ludpxprt) {
320 syslog(LOG_WARNING,
321 "non-local set attempt (might be from %s)",
322 inet_ntoa(fromsin->sin_addr));
323 svcerr_noproc(xprt);
324 return;
325 }
326 if (!svc_getargs(xprt, xdr_pmap, (caddr_t)®)) {
327 svcerr_decode(xprt);
328 break;
329 }
330
331 /*
332 * check to see if already used
333 * find_service returns a hit even if
334 * the versions don't match, so check for it
335 */
336 fnd = find_service(reg.pm_prog, reg.pm_vers, reg.pm_prot);
337 if (fnd && fnd->pml_map.pm_vers == reg.pm_vers) {
338 if (fnd->pml_map.pm_port == reg.pm_port)
339 ans = 1;
340 goto done;
341 }
342
343 if (debugging)
344 printf("set: prog %lu vers %lu port %lu\n",
345 reg.pm_prog, reg.pm_vers, reg.pm_port);
346
347 if (reg.pm_port & ~0xffff)
348 goto done;
349
350 /*
351 * only permit localhost root to create
352 * mappings pointing at sensitive ports
353 */
354 if ((reg.pm_port < IPPORT_RESERVED ||
355 reg.pm_port == NFS_PORT) &&
356 htons(fromsin->sin_port) >= IPPORT_RESERVED) {
357 syslog(LOG_WARNING,
358 "resvport set attempt by non-root");
359 goto done;
360 }
361
362 /*
363 * add to END of list
364 */
365 pml = (struct pmaplist *)malloc(sizeof(struct pmaplist));
366 if (pml == NULL) {
367 syslog(LOG_ERR, "out of memory");
368 svcerr_systemerr(xprt);
369 return;
370 }
371
372 pml->pml_map = reg;
373 pml->pml_next = 0;
374 if (pmaplist == 0) {
375 pmaplist = pml;
376 } else {
377 for (fnd = pmaplist; fnd->pml_next != 0;
378 fnd = fnd->pml_next);
379 fnd->pml_next = pml;
380 }
381 ans = 1;
382 done:
383 if ((!svc_sendreply(xprt, xdr_long, (caddr_t)&ans)) &&
384 debugging) {
385 (void) fprintf(stderr, "svc_sendreply\n");
386 abort();
387 }
388 break;
389
390 case PMAPPROC_UNSET:
391 /*
392 * Remove a program,version to port mapping.
393 */
394 if (xprt != ltcpxprt && xprt != ludpxprt) {
395 syslog(LOG_WARNING,
396 "non-local unset attempt (might be from %s)",
397 inet_ntoa(fromsin->sin_addr));
398 svcerr_noproc(xprt);
399 return;
400 }
401 if (!svc_getargs(xprt, xdr_pmap, (caddr_t)®)) {
402 svcerr_decode(xprt);
403 break;
404 }
405 for (prevpml = NULL, pml = pmaplist; pml != NULL; ) {
406 if ((pml->pml_map.pm_prog != reg.pm_prog) ||
407 (pml->pml_map.pm_vers != reg.pm_vers)) {
408 /* both pml & prevpml move forwards */
409 prevpml = pml;
410 pml = pml->pml_next;
411 continue;
412 }
413 if ((pml->pml_map.pm_port < IPPORT_RESERVED ||
414 pml->pml_map.pm_port == NFS_PORT) &&
415 htons(fromsin->sin_port) >= IPPORT_RESERVED) {
416 syslog(LOG_WARNING,
417 "resvport unset attempt by non-root");
418 break;
419 }
420
421 /* found it; pml moves forward, prevpml stays */
422 ans = 1;
423 t = (caddr_t)pml;
424 pml = pml->pml_next;
425 if (prevpml == NULL)
426 pmaplist = pml;
427 else
428 prevpml->pml_next = pml;
429 free(t);
430 }
431 if ((!svc_sendreply(xprt, xdr_long, (caddr_t)&ans)) &&
432 debugging) {
433 fprintf(stderr, "svc_sendreply\n");
434 abort();
435 }
436 break;
437
438 case PMAPPROC_GETPORT:
439 /*
440 * Lookup the mapping for a program,version and return its port
441 */
442 if (!svc_getargs(xprt, xdr_pmap, (caddr_t)®)) {
443 svcerr_decode(xprt);
444 break;
445 }
446 fnd = find_service(reg.pm_prog, reg.pm_vers, reg.pm_prot);
447 if (fnd)
448 port = fnd->pml_map.pm_port;
449 else
450 port = 0;
451 if ((!svc_sendreply(xprt, xdr_long, (caddr_t)&port)) &&
452 debugging) {
453 fprintf(stderr, "svc_sendreply\n");
454 abort();
455 }
456 break;
457
458 case PMAPPROC_DUMP:
459 /*
460 * Return the current set of mapped program,version
461 */
462 if (!svc_getargs(xprt, xdr_void, NULL)) {
463 svcerr_decode(xprt);
464 break;
465 }
466 if (!svc_sendreply(xprt, xdr_pmaplist, (caddr_t)&pmaplist) &&
467 debugging) {
468 fprintf(stderr, "svc_sendreply\n");
469 abort();
470 }
471 break;
472
473 case PMAPPROC_CALLIT:
474 /*
475 * Calls a procedure on the local machine. If the requested
476 * procedure is not registered this procedure does not return
477 * error information!!
478 * This procedure is only supported on rpc/udp and calls via
479 * rpc/udp. It passes null authentication parameters.
480 */
481 callit(rqstp, xprt);
482 break;
483
484 default:
485 svcerr_noproc(xprt);
486 break;
487 }
488 }
489
490
491 /*
492 * Stuff for the rmtcall service
493 */
494 #define ARGSIZE 9000
495
496 struct encap_parms {
497 u_int arglen;
498 char *args;
499 };
500
501 static bool_t
xdr_encap_parms(XDR * xdrs,struct encap_parms * epp)502 xdr_encap_parms(XDR *xdrs, struct encap_parms *epp)
503 {
504
505 return (xdr_bytes(xdrs, &(epp->args), &(epp->arglen), ARGSIZE));
506 }
507
508 struct rmtcallargs {
509 u_long rmt_prog;
510 u_long rmt_vers;
511 u_long rmt_port;
512 u_long rmt_proc;
513 struct encap_parms rmt_args;
514 };
515
516 static bool_t
xdr_rmtcall_args(XDR * xdrs,struct rmtcallargs * cap)517 xdr_rmtcall_args(XDR *xdrs, struct rmtcallargs *cap)
518 {
519
520 /* does not get a port number */
521 if (xdr_u_long(xdrs, &(cap->rmt_prog)) &&
522 xdr_u_long(xdrs, &(cap->rmt_vers)) &&
523 xdr_u_long(xdrs, &(cap->rmt_proc))) {
524 return (xdr_encap_parms(xdrs, &(cap->rmt_args)));
525 }
526 return (FALSE);
527 }
528
529 static bool_t
xdr_rmtcall_result(XDR * xdrs,struct rmtcallargs * cap)530 xdr_rmtcall_result(XDR *xdrs, struct rmtcallargs *cap)
531 {
532 if (xdr_u_long(xdrs, &(cap->rmt_port)))
533 return (xdr_encap_parms(xdrs, &(cap->rmt_args)));
534 return (FALSE);
535 }
536
537 /*
538 * only worries about the struct encap_parms part of struct rmtcallargs.
539 * The arglen must already be set!!
540 */
541 static bool_t
xdr_opaque_parms(XDR * xdrs,struct rmtcallargs * cap)542 xdr_opaque_parms(XDR *xdrs, struct rmtcallargs *cap)
543 {
544
545 return (xdr_opaque(xdrs, cap->rmt_args.args, cap->rmt_args.arglen));
546 }
547
548 /*
549 * This routine finds and sets the length of incoming opaque paraters
550 * and then calls xdr_opaque_parms.
551 */
552 static bool_t
xdr_len_opaque_parms(XDR * xdrs,struct rmtcallargs * cap)553 xdr_len_opaque_parms(XDR *xdrs, struct rmtcallargs *cap)
554 {
555 u_int beginpos, lowpos, highpos, currpos, pos;
556
557 beginpos = lowpos = pos = xdr_getpos(xdrs);
558 highpos = lowpos + ARGSIZE;
559 while ((int)(highpos - lowpos) >= 0) {
560 currpos = (lowpos + highpos) / 2;
561 if (xdr_setpos(xdrs, currpos)) {
562 pos = currpos;
563 lowpos = currpos + 1;
564 } else {
565 highpos = currpos - 1;
566 }
567 }
568 xdr_setpos(xdrs, beginpos);
569 cap->rmt_args.arglen = pos - beginpos;
570 return (xdr_opaque_parms(xdrs, cap));
571 }
572
573 /*
574 * Call a remote procedure service
575 * This procedure is very quiet when things go wrong.
576 * The proc is written to support broadcast rpc. In the broadcast case,
577 * a machine should shut-up instead of complain, less the requestor be
578 * overrun with complaints at the expense of not hearing a valid reply ...
579 *
580 * This now forks so that the program & process that it calls can call
581 * back to the portmapper.
582 */
583 void
callit(struct svc_req * rqstp,SVCXPRT * xprt)584 callit(struct svc_req *rqstp, SVCXPRT *xprt)
585 {
586 struct rmtcallargs a;
587 struct pmaplist *pml;
588 u_short port;
589 struct sockaddr_in me;
590 pid_t pid;
591 int so = -1, dontblock = 1;
592 CLIENT *client;
593 struct authunix_parms *au = (struct authunix_parms *)rqstp->rq_clntcred;
594 struct timeval timeout;
595 char buf[ARGSIZE];
596
597 timeout.tv_sec = 5;
598 timeout.tv_usec = 0;
599 a.rmt_args.args = buf;
600 if (!svc_getargs(xprt, xdr_rmtcall_args, (caddr_t)&a))
601 return;
602 if (!check_callit(svc_getcaller(xprt), rqstp->rq_proc,
603 a.rmt_prog, a.rmt_proc))
604 return;
605 if ((pml = find_service(a.rmt_prog, a.rmt_vers,
606 (u_long)IPPROTO_UDP)) == NULL)
607 return;
608
609 /*
610 * fork a child to do the work. Parent immediately returns.
611 * Child exits upon completion.
612 */
613 if ((pid = fork()) != 0) {
614 if (pid == -1)
615 syslog(LOG_ERR, "CALLIT (prog %lu): fork: %m",
616 a.rmt_prog);
617 return;
618 }
619 port = pml->pml_map.pm_port;
620 get_myaddress(&me);
621 me.sin_port = htons(port);
622
623 /* Avoid implicit binding to reserved port by clntudp_create() */
624 so = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
625 if (so == -1)
626 exit(1);
627 if (ioctl(so, FIONBIO, &dontblock) == -1)
628 exit(1);
629
630 client = clntudp_create(&me, a.rmt_prog, a.rmt_vers, timeout, &so);
631 if (client != (CLIENT *)NULL) {
632 if (rqstp->rq_cred.oa_flavor == AUTH_UNIX)
633 client->cl_auth = authunix_create(au->aup_machname,
634 au->aup_uid, au->aup_gid, au->aup_len, au->aup_gids);
635 a.rmt_port = (u_long)port;
636 if (clnt_call(client, a.rmt_proc, xdr_opaque_parms, &a,
637 xdr_len_opaque_parms, &a, timeout) == RPC_SUCCESS)
638 svc_sendreply(xprt, xdr_rmtcall_result, (caddr_t)&a);
639 AUTH_DESTROY(client->cl_auth);
640 clnt_destroy(client);
641 }
642 (void)close(so);
643 exit(0);
644 }
645
646 /* ARGSUSED */
647 void
reap(int signo)648 reap(int signo)
649 {
650 int save_errno = errno;
651
652 while (wait3(NULL, WNOHANG, NULL) > 0)
653 ;
654 errno = save_errno;
655 }
656
657 #define NFSPROG ((u_long) 100003)
658 #define MOUNTPROG ((u_long) 100005)
659 #define YPXPROG ((u_long) 100069)
660 #define YPPROG ((u_long) 100004)
661 #define YPPROC_DOMAIN_NONACK ((u_long) 2)
662 #define MOUNTPROC_MNT ((u_long) 1)
663 #define XXXPROC_NOP ((u_long) 0)
664
665 int
check_callit(struct sockaddr_in * addr,u_long proc,u_long prog,u_long aproc)666 check_callit(struct sockaddr_in *addr, u_long proc, u_long prog,
667 u_long aproc)
668 {
669 if ((prog == PMAPPROG && aproc != XXXPROC_NOP) ||
670 (prog == NFSPROG && aproc != XXXPROC_NOP) ||
671 (prog == YPXPROG && aproc != XXXPROC_NOP) ||
672 (prog == MOUNTPROG && aproc == MOUNTPROC_MNT) ||
673 (prog == YPPROG && aproc != YPPROC_DOMAIN_NONACK)) {
674 syslog(LOG_WARNING,
675 "callit prog %d aproc %d (might be from %s)",
676 (int)prog, (int)aproc, inet_ntoa(addr->sin_addr));
677 return (FALSE);
678 }
679 return (TRUE);
680 }
681