1 /* $NetBSD: rpcbind.c,v 1.3 2002/11/08 00:16:40 fvdl 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) 1984 - 1991 by Sun Microsystems, Inc.
34 */
35
36 /*
37 * rpcbind.c
38 * Implements the program, version to address mapping for rpc.
39 *
40 */
41
42 #include <sys/types.h>
43 #include <sys/stat.h>
44 #include <sys/errno.h>
45 #include <sys/time.h>
46 #include <sys/resource.h>
47 #include <sys/wait.h>
48 #include <sys/signal.h>
49 #include <sys/socket.h>
50 #include <sys/un.h>
51 #include <rpc/rpc.h>
52 #include <rpc/rpc_com.h>
53 #ifdef PORTMAP
54 #include <netinet/in.h>
55 #endif
56 #include <arpa/inet.h>
57 #include <fcntl.h>
58 #include <netdb.h>
59 #include <stdio.h>
60 #include <netconfig.h>
61 #include <stdlib.h>
62 #include <unistd.h>
63 #include <syslog.h>
64 #include <err.h>
65 #include <pwd.h>
66 #include <string.h>
67 #include <errno.h>
68 #include "rpcbind.h"
69
70 /* Global variables */
71 int debugging = 0; /* Tell me what's going on */
72 int doabort = 0; /* When debugging, do an abort on errors */
73 int terminate_rfd; /* Pipefd to wake on signal */
74 volatile sig_atomic_t doterminate = 0; /* Terminal signal received */
75 rpcblist_ptr list_rbl; /* A list of version 3/4 rpcbind services */
76 int rpcbindlockfd;
77
78 /* who to suid to if -s is given */
79 #define RUN_AS "daemon"
80
81 #define RPCBINDDLOCK "/var/run/rpcbind.lock"
82
83 static int runasdaemon = 0;
84 int insecure = 0;
85 int oldstyle_local = 0;
86 #ifdef LIBWRAP
87 int libwrap = 0;
88 #endif
89 int nofork = 0;
90 int verboselog = 0;
91 int nobind_localhost = 0;
92
93 static char **hosts = NULL;
94 static struct sockaddr **bound_sa;
95 static int ipv6_only = 0;
96 static int nhosts = 0;
97 static int on = 1;
98 static int terminate_wfd;
99
100 #ifdef WARMSTART
101 /* Local Variable */
102 static int warmstart = 0; /* Grab an old copy of registrations. */
103 #endif
104
105 #ifdef PORTMAP
106 struct pmaplist *list_pml; /* A list of version 2 rpcbind services */
107 char *udptrans; /* Name of UDP transport */
108 char *tcptrans; /* Name of TCP transport */
109 char *udp_uaddr; /* Universal UDP address */
110 char *tcp_uaddr; /* Universal TCP address */
111 #endif
112 static char servname[] = "rpcbind";
113 static char superuser[] = "superuser";
114
115 int main(int, char *[]);
116
117 static int init_transport(struct netconfig *);
118 static void rbllist_add(rpcprog_t, rpcvers_t, struct netconfig *,
119 struct netbuf *);
120 static void terminate(int);
121 static void parseargs(int, char *[]);
122 static void update_bound_sa(void);
123
124 int
main(int argc,char * argv[])125 main(int argc, char *argv[])
126 {
127 struct netconfig *nconf;
128 void *nc_handle; /* Net config handle */
129 struct rlimit rl;
130 int maxrec = RPC_MAXDATASIZE;
131 int error, fds[2];
132
133 parseargs(argc, argv);
134
135 update_bound_sa();
136
137 /* Check that another rpcbind isn't already running. */
138 if ((rpcbindlockfd = (open(RPCBINDDLOCK,
139 O_RDONLY|O_CREAT, 0444))) == -1)
140 err(1, "%s", RPCBINDDLOCK);
141
142 if(flock(rpcbindlockfd, LOCK_EX|LOCK_NB) == -1 && errno == EWOULDBLOCK)
143 errx(1, "another rpcbind is already running. Aborting");
144
145 getrlimit(RLIMIT_NOFILE, &rl);
146 if (rl.rlim_cur < 128) {
147 if (rl.rlim_max <= 128)
148 rl.rlim_cur = rl.rlim_max;
149 else
150 rl.rlim_cur = 128;
151 setrlimit(RLIMIT_NOFILE, &rl);
152 }
153 openlog("rpcbind", LOG_CONS, LOG_DAEMON);
154 if (geteuid()) { /* This command allowed only to root */
155 fprintf(stderr, "Sorry. You are not superuser\n");
156 exit(1);
157 }
158 nc_handle = setnetconfig(); /* open netconfig file */
159 if (nc_handle == NULL) {
160 syslog(LOG_ERR, "could not read /etc/netconfig");
161 exit(1);
162 }
163 #ifdef PORTMAP
164 udptrans = "";
165 tcptrans = "";
166 #endif
167
168 nconf = getnetconfigent("local");
169 if (nconf == NULL)
170 nconf = getnetconfigent("unix");
171 if (nconf == NULL) {
172 syslog(LOG_ERR, "%s: can't find local transport\n", argv[0]);
173 exit(1);
174 }
175
176 rpc_control(RPC_SVC_CONNMAXREC_SET, &maxrec);
177
178 init_transport(nconf);
179
180 while ((nconf = getnetconfig(nc_handle))) {
181 if (nconf->nc_flag & NC_VISIBLE) {
182 if (ipv6_only == 1 && strcmp(nconf->nc_protofmly,
183 "inet") == 0) {
184 /* DO NOTHING */
185 } else
186 init_transport(nconf);
187 }
188 }
189 endnetconfig(nc_handle);
190
191 /*
192 * Allocate pipe fd to wake main thread from signal handler in non-racy
193 * way.
194 */
195 error = pipe(fds);
196 if (error != 0)
197 err(1, "pipe failed");
198 terminate_rfd = fds[0];
199 terminate_wfd = fds[1];
200
201 /* catch the usual termination signals for graceful exit */
202 (void) signal(SIGCHLD, reap);
203 (void) signal(SIGINT, terminate);
204 (void) signal(SIGTERM, terminate);
205 (void) signal(SIGQUIT, terminate);
206 /* ignore others that could get sent */
207 (void) signal(SIGPIPE, SIG_IGN);
208 (void) signal(SIGHUP, SIG_IGN);
209 (void) signal(SIGUSR1, SIG_IGN);
210 (void) signal(SIGUSR2, SIG_IGN);
211 #ifdef WARMSTART
212 if (warmstart) {
213 read_warmstart();
214 }
215 #endif
216 if (debugging) {
217 printf("rpcbind debugging enabled.");
218 if (doabort) {
219 printf(" Will abort on errors!\n");
220 } else {
221 printf("\n");
222 }
223 } else if (!nofork) {
224 if (daemon(0, 0))
225 err(1, "fork failed");
226 }
227
228 if (runasdaemon) {
229 struct passwd *p;
230
231 if((p = getpwnam(RUN_AS)) == NULL) {
232 syslog(LOG_ERR, "cannot get uid of daemon: %m");
233 exit(1);
234 }
235 if (setuid(p->pw_uid) == -1) {
236 syslog(LOG_ERR, "setuid to daemon failed: %m");
237 exit(1);
238 }
239 }
240
241 network_init();
242
243 my_svc_run();
244 syslog(LOG_ERR, "svc_run returned unexpectedly");
245 rpcbind_abort();
246 /* NOTREACHED */
247
248 return 0;
249 }
250
251 /*
252 * Adds the entry into the rpcbind database.
253 * If PORTMAP, then for UDP and TCP, it adds the entries for version 2 also
254 * Returns 0 if succeeds, else fails
255 */
256 static int
init_transport(struct netconfig * nconf)257 init_transport(struct netconfig *nconf)
258 {
259 int fd;
260 struct t_bind taddr;
261 struct addrinfo hints, *res = NULL;
262 struct __rpc_sockinfo si;
263 SVCXPRT *my_xprt;
264 int status; /* bound checking ? */
265 int aicode;
266 int addrlen;
267 int nhostsbak;
268 int bound;
269 struct sockaddr *sa;
270 u_int32_t host_addr[4]; /* IPv4 or IPv6 */
271 struct sockaddr_un sun;
272 mode_t oldmask;
273
274 if ((nconf->nc_semantics != NC_TPI_CLTS) &&
275 (nconf->nc_semantics != NC_TPI_COTS) &&
276 (nconf->nc_semantics != NC_TPI_COTS_ORD))
277 return (1); /* not my type */
278 #ifdef ND_DEBUG
279 if (debugging) {
280 int i;
281 char **s;
282
283 (void)fprintf(stderr, "%s: %ld lookup routines :\n",
284 nconf->nc_netid, nconf->nc_nlookups);
285 for (i = 0, s = nconf->nc_lookups; i < nconf->nc_nlookups;
286 i++, s++)
287 fprintf(stderr, "[%d] - %s\n", i, *s);
288 }
289 #endif
290
291 /*
292 * XXX - using RPC library internal functions.
293 */
294 if ((strcmp(nconf->nc_netid, "local") == 0) ||
295 (strcmp(nconf->nc_netid, "unix") == 0)) {
296 /*
297 * For other transports we call this later, for each socket we
298 * like to bind.
299 */
300 if ((fd = __rpc_nconf2fd(nconf)) < 0) {
301 int non_fatal = 0;
302 if (errno == EAFNOSUPPORT)
303 non_fatal = 1;
304 syslog(non_fatal?LOG_DEBUG:LOG_ERR, "cannot create socket for %s",
305 nconf->nc_netid);
306 return (1);
307 }
308 }
309
310 if (!__rpc_nconf2sockinfo(nconf, &si)) {
311 syslog(LOG_ERR, "cannot get information for %s",
312 nconf->nc_netid);
313 return (1);
314 }
315
316 if ((strcmp(nconf->nc_netid, "local") == 0) ||
317 (strcmp(nconf->nc_netid, "unix") == 0)) {
318 memset(&sun, 0, sizeof sun);
319 sun.sun_family = AF_LOCAL;
320 unlink(_PATH_RPCBINDSOCK);
321 strcpy(sun.sun_path, _PATH_RPCBINDSOCK);
322 sun.sun_len = SUN_LEN(&sun);
323 addrlen = sizeof (struct sockaddr_un);
324 sa = (struct sockaddr *)&sun;
325 } else {
326 /* Get rpcbind's address on this transport */
327
328 memset(&hints, 0, sizeof hints);
329 hints.ai_flags = AI_PASSIVE;
330 hints.ai_family = si.si_af;
331 hints.ai_socktype = si.si_socktype;
332 hints.ai_protocol = si.si_proto;
333 }
334
335 if ((strcmp(nconf->nc_netid, "local") != 0) &&
336 (strcmp(nconf->nc_netid, "unix") != 0)) {
337 /*
338 * If no hosts were specified, just bind to INADDR_ANY.
339 * Otherwise make sure 127.0.0.1 is added to the list.
340 */
341 nhostsbak = nhosts + 1;
342 hosts = realloc(hosts, nhostsbak * sizeof(char *));
343 if (nhostsbak == 1)
344 hosts[0] = "*";
345 else {
346 if (hints.ai_family == AF_INET && nobind_localhost == 0) {
347 hosts[nhostsbak - 1] = "127.0.0.1";
348 } else if (hints.ai_family == AF_INET6 && nobind_localhost == 0) {
349 hosts[nhostsbak - 1] = "::1";
350 } else
351 return 1;
352 }
353
354 /*
355 * Bind to specific IPs if asked to
356 */
357 bound = 0;
358 while (nhostsbak > 0) {
359 --nhostsbak;
360 /*
361 * XXX - using RPC library internal functions.
362 */
363 if ((fd = __rpc_nconf2fd(nconf)) < 0) {
364 int non_fatal = 0;
365 if (errno == EAFNOSUPPORT &&
366 nconf->nc_semantics != NC_TPI_CLTS)
367 non_fatal = 1;
368 syslog(non_fatal ? LOG_DEBUG : LOG_ERR,
369 "cannot create socket for %s", nconf->nc_netid);
370 return (1);
371 }
372 switch (hints.ai_family) {
373 case AF_INET:
374 if (inet_pton(AF_INET, hosts[nhostsbak],
375 host_addr) == 1) {
376 hints.ai_flags &= AI_NUMERICHOST;
377 } else {
378 /*
379 * Skip if we have an AF_INET6 address.
380 */
381 if (inet_pton(AF_INET6,
382 hosts[nhostsbak], host_addr) == 1) {
383 close(fd);
384 continue;
385 }
386 }
387 break;
388 case AF_INET6:
389 if (inet_pton(AF_INET6, hosts[nhostsbak],
390 host_addr) == 1) {
391 hints.ai_flags &= AI_NUMERICHOST;
392 } else {
393 /*
394 * Skip if we have an AF_INET address.
395 */
396 if (inet_pton(AF_INET, hosts[nhostsbak],
397 host_addr) == 1) {
398 close(fd);
399 continue;
400 }
401 }
402 if (setsockopt(fd, IPPROTO_IPV6,
403 IPV6_V6ONLY, &on, sizeof on) < 0) {
404 syslog(LOG_ERR,
405 "can't set v6-only binding for "
406 "ipv6 socket: %m");
407 continue;
408 }
409 break;
410 default:
411 break;
412 }
413
414 /*
415 * If no hosts were specified, just bind to INADDR_ANY
416 */
417 if (strcmp("*", hosts[nhostsbak]) == 0)
418 hosts[nhostsbak] = NULL;
419 if ((aicode = getaddrinfo(hosts[nhostsbak], servname, &hints,
420 &res)) != 0) {
421 syslog(LOG_ERR, "cannot get local address for %s: %s",
422 nconf->nc_netid, gai_strerror(aicode));
423 continue;
424 }
425 addrlen = res->ai_addrlen;
426 sa = (struct sockaddr *)res->ai_addr;
427 oldmask = umask(S_IXUSR|S_IXGRP|S_IXOTH);
428 if (bind(fd, sa, addrlen) != 0) {
429 syslog(LOG_ERR, "cannot bind %s on %s: %m",
430 (hosts[nhostsbak] == NULL) ? "*" :
431 hosts[nhostsbak], nconf->nc_netid);
432 if (res != NULL)
433 freeaddrinfo(res);
434 continue;
435 } else
436 bound = 1;
437 (void)umask(oldmask);
438
439 /* Copy the address */
440 taddr.addr.len = taddr.addr.maxlen = addrlen;
441 taddr.addr.buf = malloc(addrlen);
442 if (taddr.addr.buf == NULL) {
443 syslog(LOG_ERR,
444 "cannot allocate memory for %s address",
445 nconf->nc_netid);
446 if (res != NULL)
447 freeaddrinfo(res);
448 return 1;
449 }
450 memcpy(taddr.addr.buf, sa, addrlen);
451 #ifdef ND_DEBUG
452 if (debugging) {
453 /*
454 * for debugging print out our universal
455 * address
456 */
457 char *uaddr;
458 struct netbuf nb;
459
460 nb.buf = sa;
461 nb.len = nb.maxlen = sa->sa_len;
462 uaddr = taddr2uaddr(nconf, &nb);
463 (void)fprintf(stderr,
464 "rpcbind : my address is %s\n", uaddr);
465 (void)free(uaddr);
466 }
467 #endif
468
469 if (nconf->nc_semantics != NC_TPI_CLTS)
470 listen(fd, SOMAXCONN);
471
472 my_xprt = (SVCXPRT *)svc_tli_create(fd, nconf, &taddr,
473 RPC_MAXDATASIZE, RPC_MAXDATASIZE);
474 if (my_xprt == (SVCXPRT *)NULL) {
475 syslog(LOG_ERR, "%s: could not create service",
476 nconf->nc_netid);
477 goto error;
478 }
479 }
480 if (!bound)
481 return 1;
482 } else {
483 oldmask = umask(S_IXUSR|S_IXGRP|S_IXOTH);
484 if (bind(fd, sa, addrlen) < 0) {
485 syslog(LOG_ERR, "cannot bind %s: %m", nconf->nc_netid);
486 if (res != NULL)
487 freeaddrinfo(res);
488 return 1;
489 }
490 (void) umask(oldmask);
491
492 /* Copy the address */
493 taddr.addr.len = taddr.addr.maxlen = addrlen;
494 taddr.addr.buf = malloc(addrlen);
495 if (taddr.addr.buf == NULL) {
496 syslog(LOG_ERR, "cannot allocate memory for %s address",
497 nconf->nc_netid);
498 if (res != NULL)
499 freeaddrinfo(res);
500 return 1;
501 }
502 memcpy(taddr.addr.buf, sa, addrlen);
503 #ifdef ND_DEBUG
504 if (debugging) {
505 /* for debugging print out our universal address */
506 char *uaddr;
507 struct netbuf nb;
508
509 nb.buf = sa;
510 nb.len = nb.maxlen = sa->sa_len;
511 uaddr = taddr2uaddr(nconf, &nb);
512 (void) fprintf(stderr, "rpcbind : my address is %s\n",
513 uaddr);
514 (void) free(uaddr);
515 }
516 #endif
517
518 if (nconf->nc_semantics != NC_TPI_CLTS)
519 listen(fd, SOMAXCONN);
520
521 my_xprt = (SVCXPRT *)svc_tli_create(fd, nconf, &taddr,
522 RPC_MAXDATASIZE, RPC_MAXDATASIZE);
523 if (my_xprt == (SVCXPRT *)NULL) {
524 syslog(LOG_ERR, "%s: could not create service",
525 nconf->nc_netid);
526 goto error;
527 }
528 }
529
530 #ifdef PORTMAP
531 /*
532 * Register both the versions for tcp/ip, udp/ip and local.
533 */
534 if ((strcmp(nconf->nc_protofmly, NC_INET) == 0 &&
535 (strcmp(nconf->nc_proto, NC_TCP) == 0 ||
536 strcmp(nconf->nc_proto, NC_UDP) == 0)) ||
537 (strcmp(nconf->nc_netid, "unix") == 0) ||
538 (strcmp(nconf->nc_netid, "local") == 0)) {
539 struct pmaplist *pml;
540
541 if (!svc_register(my_xprt, PMAPPROG, PMAPVERS,
542 pmap_service, 0)) {
543 syslog(LOG_ERR, "could not register on %s",
544 nconf->nc_netid);
545 goto error;
546 }
547 pml = malloc(sizeof (struct pmaplist));
548 if (pml == NULL) {
549 syslog(LOG_ERR, "no memory!");
550 exit(1);
551 }
552 pml->pml_map.pm_prog = PMAPPROG;
553 pml->pml_map.pm_vers = PMAPVERS;
554 pml->pml_map.pm_port = PMAPPORT;
555 if (strcmp(nconf->nc_proto, NC_TCP) == 0) {
556 if (tcptrans[0]) {
557 free(pml);
558 pml = NULL;
559 syslog(LOG_ERR,
560 "cannot have more than one TCP transport");
561 goto error;
562 }
563 tcptrans = strdup(nconf->nc_netid);
564 pml->pml_map.pm_prot = IPPROTO_TCP;
565
566 /* Let's snarf the universal address */
567 /* "h1.h2.h3.h4.p1.p2" */
568 tcp_uaddr = taddr2uaddr(nconf, &taddr.addr);
569 } else if (strcmp(nconf->nc_proto, NC_UDP) == 0) {
570 if (udptrans[0]) {
571 syslog(LOG_ERR,
572 "cannot have more than one UDP transport");
573 goto error;
574 }
575 udptrans = strdup(nconf->nc_netid);
576 pml->pml_map.pm_prot = IPPROTO_UDP;
577
578 /* Let's snarf the universal address */
579 /* "h1.h2.h3.h4.p1.p2" */
580 udp_uaddr = taddr2uaddr(nconf, &taddr.addr);
581 } else if (strcmp(nconf->nc_netid, "local") == 0)
582 pml->pml_map.pm_prot = IPPROTO_ST;
583 else if (strcmp(nconf->nc_netid, "unix") == 0)
584 pml->pml_map.pm_prot = IPPROTO_ST;
585 pml->pml_next = list_pml;
586 list_pml = pml;
587
588 /* Add version 3 information */
589 pml = malloc(sizeof (struct pmaplist));
590 if (pml == NULL) {
591 syslog(LOG_ERR, "no memory!");
592 exit(1);
593 }
594 pml->pml_map = list_pml->pml_map;
595 pml->pml_map.pm_vers = RPCBVERS;
596 pml->pml_next = list_pml;
597 list_pml = pml;
598
599 /* Add version 4 information */
600 pml = malloc (sizeof (struct pmaplist));
601 if (pml == NULL) {
602 syslog(LOG_ERR, "no memory!");
603 exit(1);
604 }
605 pml->pml_map = list_pml->pml_map;
606 pml->pml_map.pm_vers = RPCBVERS4;
607 pml->pml_next = list_pml;
608 list_pml = pml;
609
610 /* Also add version 2 stuff to rpcbind list */
611 rbllist_add(PMAPPROG, PMAPVERS, nconf, &taddr.addr);
612 }
613 #endif
614
615 /* version 3 registration */
616 if (!svc_reg(my_xprt, RPCBPROG, RPCBVERS, rpcb_service_3, NULL)) {
617 syslog(LOG_ERR, "could not register %s version 3",
618 nconf->nc_netid);
619 goto error;
620 }
621 rbllist_add(RPCBPROG, RPCBVERS, nconf, &taddr.addr);
622
623 /* version 4 registration */
624 if (!svc_reg(my_xprt, RPCBPROG, RPCBVERS4, rpcb_service_4, NULL)) {
625 syslog(LOG_ERR, "could not register %s version 4",
626 nconf->nc_netid);
627 goto error;
628 }
629 rbllist_add(RPCBPROG, RPCBVERS4, nconf, &taddr.addr);
630
631 /* decide if bound checking works for this transport */
632 status = add_bndlist(nconf, &taddr.addr);
633 #ifdef BIND_DEBUG
634 if (debugging) {
635 if (status < 0) {
636 fprintf(stderr, "Error in finding bind status for %s\n",
637 nconf->nc_netid);
638 } else if (status == 0) {
639 fprintf(stderr, "check binding for %s\n",
640 nconf->nc_netid);
641 } else if (status > 0) {
642 fprintf(stderr, "No check binding for %s\n",
643 nconf->nc_netid);
644 }
645 }
646 #endif
647 /*
648 * rmtcall only supported on CLTS transports for now.
649 */
650 if (nconf->nc_semantics == NC_TPI_CLTS) {
651 status = create_rmtcall_fd(nconf);
652
653 #ifdef BIND_DEBUG
654 if (debugging) {
655 if (status < 0) {
656 fprintf(stderr,
657 "Could not create rmtcall fd for %s\n",
658 nconf->nc_netid);
659 } else {
660 fprintf(stderr, "rmtcall fd for %s is %d\n",
661 nconf->nc_netid, status);
662 }
663 }
664 #endif
665 }
666 return (0);
667 error:
668 close(fd);
669 return (1);
670 }
671
672 /*
673 * Create the list of addresses that we're bound to. Normally, this
674 * list is empty because we're listening on the wildcard address
675 * (nhost == 0). If -h is specified on the command line, then
676 * bound_sa will have a list of the addresses that the program binds
677 * to specifically. This function takes that list and converts them to
678 * struct sockaddr * and stores them in bound_sa.
679 */
680 static void
update_bound_sa(void)681 update_bound_sa(void)
682 {
683 struct addrinfo hints, *res = NULL;
684 int i;
685
686 if (nhosts == 0)
687 return;
688 bound_sa = malloc(sizeof(*bound_sa) * nhosts);
689 memset(&hints, 0, sizeof(hints));
690 hints.ai_family = PF_UNSPEC;
691 for (i = 0; i < nhosts; i++) {
692 if (getaddrinfo(hosts[i], NULL, &hints, &res) != 0)
693 continue;
694 bound_sa[i] = malloc(res->ai_addrlen);
695 memcpy(bound_sa[i], res->ai_addr, res->ai_addrlen);
696 }
697 }
698
699 /*
700 * Match the sa against the list of addresses we've bound to. If
701 * we've not specifically bound to anything, we match everything.
702 * Otherwise, if the IPv4 or IPv6 address matches one of the addresses
703 * in bound_sa, we return true. If not, we return false.
704 */
705 int
listen_addr(const struct sockaddr * sa)706 listen_addr(const struct sockaddr *sa)
707 {
708 int i;
709
710 /*
711 * If nhosts == 0, then there were no -h options on the
712 * command line, so all addresses are addresses we're
713 * listening to.
714 */
715 if (nhosts == 0)
716 return 1;
717 for (i = 0; i < nhosts; i++) {
718 if (bound_sa[i] == NULL ||
719 sa->sa_family != bound_sa[i]->sa_family)
720 continue;
721 switch (sa->sa_family) {
722 case AF_INET:
723 if (memcmp(&SA2SINADDR(sa), &SA2SINADDR(bound_sa[i]),
724 sizeof(struct in_addr)) == 0)
725 return (1);
726 break;
727 #ifdef INET6
728 case AF_INET6:
729 if (memcmp(&SA2SIN6ADDR(sa), &SA2SIN6ADDR(bound_sa[i]),
730 sizeof(struct in6_addr)) == 0)
731 return (1);
732 break;
733 #endif
734 default:
735 break;
736 }
737 }
738 return (0);
739 }
740
741 static void
rbllist_add(rpcprog_t prog,rpcvers_t vers,struct netconfig * nconf,struct netbuf * addr)742 rbllist_add(rpcprog_t prog, rpcvers_t vers, struct netconfig *nconf,
743 struct netbuf *addr)
744 {
745 rpcblist_ptr rbl;
746
747 rbl = malloc(sizeof (rpcblist));
748 if (rbl == NULL) {
749 syslog(LOG_ERR, "no memory!");
750 exit(1);
751 }
752
753 rbl->rpcb_map.r_prog = prog;
754 rbl->rpcb_map.r_vers = vers;
755 rbl->rpcb_map.r_netid = strdup(nconf->nc_netid);
756 rbl->rpcb_map.r_addr = taddr2uaddr(nconf, addr);
757 rbl->rpcb_map.r_owner = strdup(superuser);
758 rbl->rpcb_next = list_rbl; /* Attach to global list */
759 list_rbl = rbl;
760 }
761
762 /*
763 * Catch the signal and die
764 */
765 static void
terminate(int signum)766 terminate(int signum)
767 {
768 char c = '\0';
769 ssize_t wr;
770
771 doterminate = signum;
772 wr = write(terminate_wfd, &c, 1);
773 if (wr < 1)
774 _exit(2);
775 }
776
777 void
rpcbind_abort(void)778 rpcbind_abort(void)
779 {
780 #ifdef WARMSTART
781 write_warmstart(); /* Dump yourself */
782 #endif
783 abort();
784 }
785
786 /* get command line options */
787 static void
parseargs(int argc,char * argv[])788 parseargs(int argc, char *argv[])
789 {
790 int c;
791
792 #ifdef WARMSTART
793 #define WSOP "w"
794 #else
795 #define WSOP ""
796 #endif
797 #ifdef LIBWRAP
798 #define WRAPOP "W"
799 #else
800 #define WRAPOP ""
801 #endif
802 while ((c = getopt(argc, argv, "6adh:IiLlNs" WRAPOP WSOP)) != -1) {
803 switch (c) {
804 case '6':
805 ipv6_only = 1;
806 break;
807 case 'a':
808 doabort = 1; /* when debugging, do an abort on */
809 break; /* errors; for rpcbind developers */
810 /* only! */
811 case 'd':
812 debugging = 1;
813 break;
814 case 'h':
815 ++nhosts;
816 hosts = realloc(hosts, nhosts * sizeof(char *));
817 if (hosts == NULL)
818 errx(1, "Out of memory");
819 hosts[nhosts - 1] = strdup(optarg);
820 if (hosts[nhosts - 1] == NULL)
821 errx(1, "Out of memory");
822 break;
823 case 'I':
824 nobind_localhost = 1;
825 break;
826 case 'i':
827 insecure = 1;
828 break;
829 case 'L':
830 oldstyle_local = 1;
831 break;
832 case 'l':
833 verboselog = 1;
834 break;
835 case 'N':
836 nofork = 1;
837 break;
838 case 's':
839 runasdaemon = 1;
840 break;
841 #ifdef LIBWRAP
842 case 'W':
843 libwrap = 1;
844 break;
845 #endif
846 #ifdef WARMSTART
847 case 'w':
848 warmstart = 1;
849 break;
850 #endif
851 default: /* error */
852 fprintf(stderr,
853 "usage: rpcbind [-6adIiLls%s%s] [-h bindip]\n",
854 WRAPOP, WSOP);
855 exit (1);
856 }
857 }
858 if (doabort && !debugging) {
859 fprintf(stderr,
860 "-a (abort) specified without -d (debugging) -- ignored.\n");
861 doabort = 0;
862 }
863 #undef WSOP
864 }
865
866 void
reap(int dummy __unused)867 reap(int dummy __unused)
868 {
869 int save_errno = errno;
870
871 while (wait3(NULL, WNOHANG, NULL) > 0)
872 ;
873 errno = save_errno;
874 }
875
876 void
toggle_verboselog(int dummy __unused)877 toggle_verboselog(int dummy __unused)
878 {
879 verboselog = !verboselog;
880 }
881