1 /* $NetBSD: lockd.c,v 1.7 2000/08/12 18:08:44 thorpej Exp $ */
2
3 /*-
4 * SPDX-License-Identifier: BSD-4-Clause
5 *
6 * Copyright (c) 1995
7 * A.R. Gordon (andrew.gordon@net-tel.co.uk). 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
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 * 3. All advertising materials mentioning features or use of this software
18 * must display the following acknowledgement:
19 * This product includes software developed for the FreeBSD project
20 * 4. Neither the name of the author nor the names of any co-contributors
21 * may be used to endorse or promote products derived from this software
22 * without specific prior written permission.
23 *
24 * THIS SOFTWARE IS PROVIDED BY ANDREW GORDON AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * SUCH DAMAGE.
35 *
36 */
37
38 #include <sys/cdefs.h>
39 #ifndef lint
40 __RCSID("$NetBSD: lockd.c,v 1.7 2000/08/12 18:08:44 thorpej Exp $");
41 #endif
42
43 /*
44 * main() function for NFS lock daemon. Most of the code in this
45 * file was generated by running rpcgen /usr/include/rpcsvc/nlm_prot.x.
46 *
47 * The actual program logic is in the file lock_proc.c
48 */
49
50 #include <sys/param.h>
51 #include <sys/linker.h>
52 #include <sys/module.h>
53 #include <sys/socket.h>
54 #include <sys/stat.h>
55
56 #include <netinet/in.h>
57 #include <arpa/inet.h>
58
59 #include <err.h>
60 #include <stdio.h>
61 #include <stdlib.h>
62 #include <errno.h>
63 #include <syslog.h>
64 #include <signal.h>
65 #include <string.h>
66 #include <unistd.h>
67 #include <libutil.h>
68 #include <netconfig.h>
69 #include <netdb.h>
70
71 #include <rpc/rpc.h>
72 #include <rpc/rpc_com.h>
73 #include <rpcsvc/sm_inter.h>
74
75 #include "lockd.h"
76 #include <rpcsvc/nlm_prot.h>
77
78 #define GETPORT_MAXTRY 20 /* Max tries to get a port # */
79
80 int debug_level = 0; /* 0 = no debugging syslog() calls */
81 int _rpcsvcdirty = 0;
82
83 int grace_expired;
84 int nsm_state;
85 int kernel_lockd;
86 int kernel_lockd_client;
87 pid_t client_pid;
88 struct mon mon_host;
89 char **hosts, *svcport_str = NULL;
90 static int mallocd_svcport = 0;
91 static int *sock_fd;
92 static int sock_fdcnt;
93 static int sock_fdpos;
94 int nhosts = 0;
95 int xcreated = 0;
96 char **addrs; /* actually (netid, uaddr) pairs */
97 int naddrs; /* count of how many (netid, uaddr) pairs */
98 char localhost[] = "localhost";
99
100 static int create_service(struct netconfig *nconf);
101 static void complete_service(struct netconfig *nconf, char *port_str);
102 static void clearout_service(void);
103 static void out_of_mem(void) __dead2;
104 void init_nsm(void);
105 void usage(void);
106
107 void sigalarm_handler(void);
108
109 /*
110 * XXX move to some header file.
111 */
112 #define _PATH_RPCLOCKDSOCK "/var/run/rpclockd.sock"
113
114 int
main(int argc,char ** argv)115 main(int argc, char **argv)
116 {
117 int ch, i, s;
118 void *nc_handle;
119 char *endptr, **hosts_bak;
120 struct sigaction sigalarm;
121 int grace_period = 30;
122 int foreground = 0;
123 struct netconfig *nconf;
124 int have_v6 = 1;
125 int maxrec = RPC_MAXDATASIZE;
126 in_port_t svcport = 0;
127 int attempt_cnt, port_len, port_pos, ret;
128 char **port_list;
129
130 while ((ch = getopt(argc, argv, "d:Fg:h:p:")) != (-1)) {
131 switch (ch) {
132 case 'd':
133 debug_level = atoi(optarg);
134 if (!debug_level) {
135 usage();
136 /* NOTREACHED */
137 }
138 break;
139 case 'F':
140 foreground = 1;
141 break;
142 case 'g':
143 grace_period = atoi(optarg);
144 if (!grace_period) {
145 usage();
146 /* NOTREACHED */
147 }
148 break;
149 case 'h':
150 ++nhosts;
151 hosts_bak = realloc(hosts, nhosts * sizeof(char *));
152 if (hosts_bak == NULL) {
153 if (hosts != NULL) {
154 for (i = 0; i < nhosts; i++)
155 free(hosts[i]);
156 free(hosts);
157 out_of_mem();
158 }
159 }
160 hosts = hosts_bak;
161 hosts[nhosts - 1] = strdup(optarg);
162 if (hosts[nhosts - 1] == NULL) {
163 for (i = 0; i < (nhosts - 1); i++)
164 free(hosts[i]);
165 free(hosts);
166 out_of_mem();
167 }
168 break;
169 case 'p':
170 endptr = NULL;
171 svcport = (in_port_t)strtoul(optarg, &endptr, 10);
172 if (endptr == NULL || *endptr != '\0' ||
173 svcport == 0 || svcport >= IPPORT_MAX)
174 usage();
175 svcport_str = strdup(optarg);
176 break;
177 default:
178 usage();
179 /* NOTREACHED */
180 }
181 }
182 if (geteuid()) { /* This command allowed only to root */
183 fprintf(stderr, "Sorry. You are not superuser\n");
184 exit(1);
185 }
186
187 kernel_lockd = FALSE;
188 kernel_lockd_client = FALSE;
189 if (modfind("nfslockd") < 0) {
190 if (kldload("nfslockd") < 0) {
191 fprintf(stderr, "Unable to load nfslockd(4), "
192 "using userland implementation\n");
193 } else {
194 kernel_lockd = TRUE;
195 }
196 } else {
197 kernel_lockd = TRUE;
198 }
199 if (kernel_lockd) {
200 if (getosreldate() >= 800040)
201 kernel_lockd_client = TRUE;
202 }
203
204 (void)rpcb_unset(NLM_PROG, NLM_SM, NULL);
205 (void)rpcb_unset(NLM_PROG, NLM_VERS, NULL);
206 (void)rpcb_unset(NLM_PROG, NLM_VERSX, NULL);
207 (void)rpcb_unset(NLM_PROG, NLM_VERS4, NULL);
208
209 /*
210 * Check if IPv6 support is present.
211 */
212 s = socket(AF_INET6, SOCK_DGRAM, IPPROTO_UDP);
213 if (s < 0)
214 have_v6 = 0;
215 else
216 close(s);
217
218 rpc_control(RPC_SVC_CONNMAXREC_SET, &maxrec);
219
220 /*
221 * If no hosts were specified, add a wildcard entry to bind to
222 * INADDR_ANY. Otherwise make sure 127.0.0.1 and ::1 are added to the
223 * list.
224 */
225 if (nhosts == 0) {
226 hosts = malloc(sizeof(char *));
227 if (hosts == NULL)
228 out_of_mem();
229
230 hosts[0] = strdup("*");
231 nhosts = 1;
232 } else {
233 if (have_v6) {
234 hosts_bak = realloc(hosts, (nhosts + 2) *
235 sizeof(char *));
236 if (hosts_bak == NULL) {
237 for (i = 0; i < nhosts; i++)
238 free(hosts[i]);
239 free(hosts);
240 out_of_mem();
241 } else
242 hosts = hosts_bak;
243
244 nhosts += 2;
245 hosts[nhosts - 2] = strdup("::1");
246 } else {
247 hosts_bak = realloc(hosts, (nhosts + 1) * sizeof(char *));
248 if (hosts_bak == NULL) {
249 for (i = 0; i < nhosts; i++)
250 free(hosts[i]);
251
252 free(hosts);
253 out_of_mem();
254 } else {
255 nhosts += 1;
256 hosts = hosts_bak;
257 }
258 }
259 hosts[nhosts - 1] = strdup("127.0.0.1");
260 }
261
262 if (kernel_lockd) {
263 if (!kernel_lockd_client) {
264 /*
265 * For the case where we have a kernel lockd but it
266 * doesn't provide client locking, we run a cut-down
267 * RPC service on a local-domain socket. The kernel's
268 * RPC server will pass what it can't handle (mainly
269 * client replies) down to us.
270 */
271 struct sockaddr_un sun;
272 int fd, oldmask;
273 SVCXPRT *xprt;
274
275 memset(&sun, 0, sizeof sun);
276 sun.sun_family = AF_LOCAL;
277 unlink(_PATH_RPCLOCKDSOCK);
278 strcpy(sun.sun_path, _PATH_RPCLOCKDSOCK);
279 sun.sun_len = SUN_LEN(&sun);
280 fd = socket(AF_LOCAL, SOCK_STREAM, 0);
281 if (!fd) {
282 err(1, "Can't create local lockd socket");
283 }
284 oldmask = umask(S_IXUSR|S_IRWXG|S_IRWXO);
285 if (bind(fd, (struct sockaddr *) &sun, sun.sun_len) < 0) {
286 err(1, "Can't bind local lockd socket");
287 }
288 umask(oldmask);
289 if (listen(fd, SOMAXCONN) < 0) {
290 err(1, "Can't listen on local lockd socket");
291 }
292 xprt = svc_vc_create(fd, RPC_MAXDATASIZE, RPC_MAXDATASIZE);
293 if (!xprt) {
294 err(1, "Can't create transport for local lockd socket");
295 }
296 if (!svc_reg(xprt, NLM_PROG, NLM_VERS4, nlm_prog_4, NULL)) {
297 err(1, "Can't register service for local lockd socket");
298 }
299 }
300
301 /*
302 * We need to look up the addresses so that we can
303 * hand uaddrs (ascii encoded address+port strings) to
304 * the kernel.
305 */
306 nc_handle = setnetconfig();
307 while ((nconf = getnetconfig(nc_handle))) {
308 /* We want to listen only on udp6, tcp6, udp, tcp transports */
309 if (nconf->nc_flag & NC_VISIBLE) {
310 /* Skip if there's no IPv6 support */
311 if (have_v6 == 0 && strcmp(nconf->nc_protofmly, "inet6") == 0) {
312 /* DO NOTHING */
313 } else {
314 create_service(nconf);
315 }
316 }
317 }
318 endnetconfig(nc_handle);
319 } else {
320 attempt_cnt = 1;
321 sock_fdcnt = 0;
322 sock_fd = NULL;
323 port_list = NULL;
324 port_len = 0;
325 nc_handle = setnetconfig();
326 while ((nconf = getnetconfig(nc_handle))) {
327 /* We want to listen only on udp6, tcp6, udp, tcp transports */
328 if (nconf->nc_flag & NC_VISIBLE) {
329 /* Skip if there's no IPv6 support */
330 if (have_v6 == 0 && strcmp(nconf->nc_protofmly, "inet6") == 0) {
331 /* DO NOTHING */
332 } else {
333 ret = create_service(nconf);
334 if (ret == 1)
335 /* Ignore this call */
336 continue;
337 if (ret < 0) {
338 /*
339 * Failed to bind port, so close
340 * off all sockets created and
341 * try again if the port# was
342 * dynamically assigned via
343 * bind(2).
344 */
345 clearout_service();
346 if (mallocd_svcport != 0 &&
347 attempt_cnt <
348 GETPORT_MAXTRY) {
349 free(svcport_str);
350 svcport_str = NULL;
351 mallocd_svcport = 0;
352 } else {
353 errno = EADDRINUSE;
354 syslog(LOG_ERR,
355 "bindresvport_sa: %m");
356 exit(1);
357 }
358
359 /*
360 * Start over at the first
361 * service.
362 */
363 free(sock_fd);
364 sock_fdcnt = 0;
365 sock_fd = NULL;
366 nc_handle = setnetconfig();
367 attempt_cnt++;
368 } else if (mallocd_svcport != 0 &&
369 attempt_cnt == GETPORT_MAXTRY) {
370 /*
371 * For the last attempt, allow
372 * different port #s for each
373 * nconf by saving the
374 * svcport_str and setting it
375 * back to NULL.
376 */
377 port_list = realloc(port_list,
378 (port_len + 1) *
379 sizeof(char *));
380 if (port_list == NULL)
381 out_of_mem();
382 port_list[port_len++] =
383 svcport_str;
384 svcport_str = NULL;
385 mallocd_svcport = 0;
386 }
387 }
388 }
389 }
390
391 /*
392 * Successfully bound the ports, so call complete_service() to
393 * do the rest of the setup on the service(s).
394 */
395 sock_fdpos = 0;
396 port_pos = 0;
397 nc_handle = setnetconfig();
398 while ((nconf = getnetconfig(nc_handle))) {
399 /* We want to listen only on udp6, tcp6, udp, tcp transports */
400 if (nconf->nc_flag & NC_VISIBLE) {
401 /* Skip if there's no IPv6 support */
402 if (have_v6 == 0 && strcmp(nconf->nc_protofmly, "inet6") == 0) {
403 /* DO NOTHING */
404 } else if (port_list != NULL) {
405 if (port_pos >= port_len) {
406 syslog(LOG_ERR,
407 "too many port#s");
408 exit(1);
409 }
410 complete_service(nconf,
411 port_list[port_pos++]);
412 } else
413 complete_service(nconf, svcport_str);
414 }
415 }
416 endnetconfig(nc_handle);
417 free(sock_fd);
418 if (port_list != NULL) {
419 for (port_pos = 0; port_pos < port_len; port_pos++)
420 free(port_list[port_pos]);
421 free(port_list);
422 }
423 }
424
425 /*
426 * Note that it is NOT sensible to run this program from inetd - the
427 * protocol assumes that it will run immediately at boot time.
428 */
429 if ((foreground == 0) && daemon(0, 0)) {
430 err(1, "cannot fork");
431 /* NOTREACHED */
432 }
433
434 openlog("rpc.lockd", 0, LOG_DAEMON);
435 if (debug_level)
436 syslog(LOG_INFO, "Starting, debug level %d", debug_level);
437 else
438 syslog(LOG_INFO, "Starting");
439
440 sigalarm.sa_handler = (sig_t) sigalarm_handler;
441 sigemptyset(&sigalarm.sa_mask);
442 sigalarm.sa_flags = SA_RESETHAND; /* should only happen once */
443 sigalarm.sa_flags |= SA_RESTART;
444 if (sigaction(SIGALRM, &sigalarm, NULL) != 0) {
445 syslog(LOG_WARNING, "sigaction(SIGALRM) failed: %s",
446 strerror(errno));
447 exit(1);
448 }
449
450 if (kernel_lockd) {
451 if (!kernel_lockd_client) {
452 init_nsm();
453 client_pid = client_request();
454
455 /*
456 * Create a child process to enter the kernel and then
457 * wait for RPCs on our local domain socket.
458 */
459 if (!fork())
460 nlm_syscall(debug_level, grace_period,
461 naddrs, addrs);
462 else
463 svc_run();
464 } else {
465 /*
466 * The kernel lockd implementation provides
467 * both client and server so we don't need to
468 * do anything else.
469 */
470 nlm_syscall(debug_level, grace_period, naddrs, addrs);
471 }
472 } else {
473 grace_expired = 0;
474 alarm(grace_period);
475
476 init_nsm();
477
478 client_pid = client_request();
479
480 svc_run(); /* Should never return */
481 }
482 exit(1);
483 }
484
485 /*
486 * This routine creates and binds sockets on the appropriate
487 * addresses if lockd for user NLM, or perform a lookup of
488 * addresses for the kernel to create transports.
489 *
490 * It gets called one time for each transport.
491 *
492 * It returns 0 upon success, 1 for ignore the call and -1 to indicate
493 * bind failed with EADDRINUSE.
494 *
495 * Any file descriptors that have been created are stored in sock_fd and
496 * the total count of them is maintained in sock_fdcnt.
497 */
498 static int
create_service(struct netconfig * nconf)499 create_service(struct netconfig *nconf)
500 {
501 struct addrinfo hints, *res = NULL;
502 struct sockaddr_in *sin;
503 struct sockaddr_in6 *sin6;
504 struct __rpc_sockinfo si;
505 int aicode;
506 int fd;
507 int nhostsbak;
508 int r;
509 u_int32_t host_addr[4]; /* IPv4 or IPv6 */
510 int mallocd_res;
511
512 if ((nconf->nc_semantics != NC_TPI_CLTS) &&
513 (nconf->nc_semantics != NC_TPI_COTS) &&
514 (nconf->nc_semantics != NC_TPI_COTS_ORD))
515 return (1); /* not my type */
516
517 /*
518 * XXX - using RPC library internal functions.
519 */
520 if (!__rpc_nconf2sockinfo(nconf, &si)) {
521 syslog(LOG_ERR, "cannot get information for %s",
522 nconf->nc_netid);
523 return (1);
524 }
525
526 /* Get rpc.statd's address on this transport */
527 memset(&hints, 0, sizeof hints);
528 hints.ai_family = si.si_af;
529 hints.ai_socktype = si.si_socktype;
530 hints.ai_protocol = si.si_proto;
531
532 /*
533 * Bind to specific IPs if asked to
534 */
535 nhostsbak = nhosts;
536 while (nhostsbak > 0) {
537 --nhostsbak;
538 mallocd_res = 0;
539 hints.ai_flags = AI_PASSIVE;
540
541 if (!kernel_lockd) {
542 sock_fd = realloc(sock_fd, (sock_fdcnt + 1) * sizeof(int));
543 if (sock_fd == NULL)
544 out_of_mem();
545 sock_fd[sock_fdcnt++] = -1; /* Set invalid for now. */
546
547 /*
548 * XXX - using RPC library internal functions.
549 */
550 if ((fd = __rpc_nconf2fd(nconf)) < 0) {
551 syslog(LOG_ERR, "cannot create socket for %s",
552 nconf->nc_netid);
553 continue;
554 }
555 }
556
557 switch (hints.ai_family) {
558 case AF_INET:
559 if (inet_pton(AF_INET, hosts[nhostsbak],
560 host_addr) == 1) {
561 hints.ai_flags |= AI_NUMERICHOST;
562 } else {
563 /*
564 * Skip if we have an AF_INET6 address.
565 */
566 if (inet_pton(AF_INET6, hosts[nhostsbak],
567 host_addr) == 1) {
568 if (!kernel_lockd)
569 close(fd);
570 continue;
571 }
572 }
573 break;
574 case AF_INET6:
575 if (inet_pton(AF_INET6, hosts[nhostsbak],
576 host_addr) == 1) {
577 hints.ai_flags |= AI_NUMERICHOST;
578 } else {
579 /*
580 * Skip if we have an AF_INET address.
581 */
582 if (inet_pton(AF_INET, hosts[nhostsbak],
583 host_addr) == 1) {
584 if (!kernel_lockd)
585 close(fd);
586 continue;
587 }
588 }
589 break;
590 default:
591 break;
592 }
593
594 /*
595 * If no hosts were specified, just bind to INADDR_ANY
596 */
597 if (strcmp("*", hosts[nhostsbak]) == 0) {
598 if (svcport_str == NULL) {
599 if ((res = malloc(sizeof(struct addrinfo))) == NULL)
600 out_of_mem();
601 mallocd_res = 1;
602 res->ai_flags = hints.ai_flags;
603 res->ai_family = hints.ai_family;
604 res->ai_protocol = hints.ai_protocol;
605 switch (res->ai_family) {
606 case AF_INET:
607 sin = malloc(sizeof(struct sockaddr_in));
608 if (sin == NULL)
609 out_of_mem();
610 sin->sin_family = AF_INET;
611 sin->sin_port = htons(0);
612 sin->sin_addr.s_addr = htonl(INADDR_ANY);
613 res->ai_addr = (struct sockaddr*) sin;
614 res->ai_addrlen = (socklen_t)
615 sizeof(struct sockaddr_in);
616 break;
617 case AF_INET6:
618 sin6 = malloc(sizeof(struct sockaddr_in6));
619 if (sin6 == NULL)
620 out_of_mem();
621 sin6->sin6_family = AF_INET6;
622 sin6->sin6_port = htons(0);
623 sin6->sin6_addr = in6addr_any;
624 res->ai_addr = (struct sockaddr*) sin6;
625 res->ai_addrlen = (socklen_t)
626 sizeof(struct sockaddr_in6);
627 break;
628 default:
629 syslog(LOG_ERR,
630 "bad address family %d",
631 res->ai_family);
632 exit(1);
633 }
634 } else {
635 if ((aicode = getaddrinfo(NULL, svcport_str,
636 &hints, &res)) != 0) {
637 syslog(LOG_ERR,
638 "cannot get local address for %s: %s",
639 nconf->nc_netid,
640 gai_strerror(aicode));
641 if (!kernel_lockd)
642 close(fd);
643 continue;
644 }
645 }
646 } else {
647 if ((aicode = getaddrinfo(hosts[nhostsbak], svcport_str,
648 &hints, &res)) != 0) {
649 syslog(LOG_ERR,
650 "cannot get local address for %s: %s",
651 nconf->nc_netid, gai_strerror(aicode));
652 if (!kernel_lockd)
653 close(fd);
654 continue;
655 }
656 }
657
658 if (kernel_lockd) {
659 struct netbuf servaddr;
660 char *uaddr;
661
662 /*
663 * Look up addresses for the kernel to create transports for.
664 */
665 servaddr.len = servaddr.maxlen = res->ai_addrlen;
666 servaddr.buf = res->ai_addr;
667 uaddr = taddr2uaddr(nconf, &servaddr);
668
669 addrs = realloc(addrs, 2 * (naddrs + 1) * sizeof(char *));
670 if (!addrs)
671 out_of_mem();
672 addrs[2 * naddrs] = strdup(nconf->nc_netid);
673 addrs[2 * naddrs + 1] = uaddr;
674 naddrs++;
675 } else {
676 /* Store the fd. */
677 sock_fd[sock_fdcnt - 1] = fd;
678
679 /* Now, attempt the bind. */
680 r = bindresvport_sa(fd, res->ai_addr);
681 if (r != 0) {
682 if (errno == EADDRINUSE && mallocd_svcport != 0) {
683 if (mallocd_res != 0) {
684 free(res->ai_addr);
685 free(res);
686 } else
687 freeaddrinfo(res);
688 return (-1);
689 }
690 syslog(LOG_ERR, "bindresvport_sa: %m");
691 exit(1);
692 }
693
694 if (svcport_str == NULL) {
695 svcport_str = malloc(NI_MAXSERV * sizeof(char));
696 if (svcport_str == NULL)
697 out_of_mem();
698 mallocd_svcport = 1;
699
700 if (getnameinfo(res->ai_addr,
701 res->ai_addr->sa_len, NULL, NI_MAXHOST,
702 svcport_str, NI_MAXSERV * sizeof(char),
703 NI_NUMERICHOST | NI_NUMERICSERV))
704 errx(1, "Cannot get port number");
705 }
706 }
707
708 if (mallocd_res != 0) {
709 free(res->ai_addr);
710 free(res);
711 } else
712 freeaddrinfo(res);
713 res = NULL;
714 }
715 return (0);
716 }
717
718 /*
719 * Called after all the create_service() calls have succeeded, to complete
720 * the setup and registration.
721 */
722 static void
complete_service(struct netconfig * nconf,char * port_str)723 complete_service(struct netconfig *nconf, char *port_str)
724 {
725 struct addrinfo hints, *res = NULL;
726 struct __rpc_sockinfo si;
727 struct netbuf servaddr;
728 SVCXPRT *transp = NULL;
729 int aicode, fd, nhostsbak;
730 int registered = 0;
731
732 if ((nconf->nc_semantics != NC_TPI_CLTS) &&
733 (nconf->nc_semantics != NC_TPI_COTS) &&
734 (nconf->nc_semantics != NC_TPI_COTS_ORD))
735 return; /* not my type */
736
737 /*
738 * XXX - using RPC library internal functions.
739 */
740 if (!__rpc_nconf2sockinfo(nconf, &si)) {
741 syslog(LOG_ERR, "cannot get information for %s",
742 nconf->nc_netid);
743 return;
744 }
745
746 nhostsbak = nhosts;
747 while (nhostsbak > 0) {
748 --nhostsbak;
749 if (sock_fdpos >= sock_fdcnt) {
750 /* Should never happen. */
751 syslog(LOG_ERR, "Ran out of socket fd's");
752 return;
753 }
754 fd = sock_fd[sock_fdpos++];
755 if (fd < 0)
756 continue;
757
758 if (nconf->nc_semantics != NC_TPI_CLTS)
759 listen(fd, SOMAXCONN);
760
761 transp = svc_tli_create(fd, nconf, NULL,
762 RPC_MAXDATASIZE, RPC_MAXDATASIZE);
763
764 if (transp != (SVCXPRT *) NULL) {
765 if (!svc_reg(transp, NLM_PROG, NLM_SM, nlm_prog_0,
766 NULL))
767 syslog(LOG_ERR,
768 "can't register %s NLM_PROG, NLM_SM service",
769 nconf->nc_netid);
770
771 if (!svc_reg(transp, NLM_PROG, NLM_VERS, nlm_prog_1,
772 NULL))
773 syslog(LOG_ERR,
774 "can't register %s NLM_PROG, NLM_VERS service",
775 nconf->nc_netid);
776
777 if (!svc_reg(transp, NLM_PROG, NLM_VERSX, nlm_prog_3,
778 NULL))
779 syslog(LOG_ERR,
780 "can't register %s NLM_PROG, NLM_VERSX service",
781 nconf->nc_netid);
782
783 if (!svc_reg(transp, NLM_PROG, NLM_VERS4, nlm_prog_4,
784 NULL))
785 syslog(LOG_ERR,
786 "can't register %s NLM_PROG, NLM_VERS4 service",
787 nconf->nc_netid);
788
789 } else
790 syslog(LOG_WARNING, "can't create %s services",
791 nconf->nc_netid);
792
793 if (registered == 0) {
794 registered = 1;
795 memset(&hints, 0, sizeof hints);
796 hints.ai_flags = AI_PASSIVE;
797 hints.ai_family = si.si_af;
798 hints.ai_socktype = si.si_socktype;
799 hints.ai_protocol = si.si_proto;
800
801 if ((aicode = getaddrinfo(NULL, port_str, &hints,
802 &res)) != 0) {
803 syslog(LOG_ERR, "cannot get local address: %s",
804 gai_strerror(aicode));
805 exit(1);
806 }
807
808 servaddr.buf = malloc(res->ai_addrlen);
809 memcpy(servaddr.buf, res->ai_addr, res->ai_addrlen);
810 servaddr.len = res->ai_addrlen;
811
812 rpcb_set(NLM_PROG, NLM_SM, nconf, &servaddr);
813 rpcb_set(NLM_PROG, NLM_VERS, nconf, &servaddr);
814 rpcb_set(NLM_PROG, NLM_VERSX, nconf, &servaddr);
815 rpcb_set(NLM_PROG, NLM_VERS4, nconf, &servaddr);
816
817 xcreated++;
818 freeaddrinfo(res);
819 }
820 } /* end while */
821 }
822
823 /*
824 * Clear out sockets after a failure to bind one of them, so that the
825 * cycle of socket creation/binding can start anew.
826 */
827 static void
clearout_service(void)828 clearout_service(void)
829 {
830 int i;
831
832 for (i = 0; i < sock_fdcnt; i++) {
833 if (sock_fd[i] >= 0) {
834 shutdown(sock_fd[i], SHUT_RDWR);
835 close(sock_fd[i]);
836 }
837 }
838 }
839
840 void
sigalarm_handler(void)841 sigalarm_handler(void)
842 {
843
844 grace_expired = 1;
845 }
846
847 void
usage(void)848 usage(void)
849 {
850 errx(1, "usage: rpc.lockd [-d <debuglevel>]"
851 " [-F] [-g <grace period>] [-h <bindip>] [-p <port>]");
852 }
853
854 /*
855 * init_nsm --
856 * Reset the NSM state-of-the-world and acquire its state.
857 */
858 void
init_nsm(void)859 init_nsm(void)
860 {
861 enum clnt_stat ret;
862 my_id id;
863 sm_stat stat;
864 char name[] = "NFS NLM";
865
866 /*
867 * !!!
868 * The my_id structure isn't used by the SM_UNMON_ALL call, as far
869 * as I know. Leave it empty for now.
870 */
871 memset(&id, 0, sizeof(id));
872 id.my_name = name;
873
874 /*
875 * !!!
876 * The statd program must already be registered when lockd runs.
877 */
878 do {
879 ret = callrpc("localhost", SM_PROG, SM_VERS, SM_UNMON_ALL,
880 (xdrproc_t)xdr_my_id, &id, (xdrproc_t)xdr_sm_stat, &stat);
881 if (ret == RPC_PROGUNAVAIL) {
882 syslog(LOG_WARNING, "%lu %s", SM_PROG,
883 clnt_sperrno(ret));
884 sleep(2);
885 continue;
886 }
887 break;
888 } while (0);
889
890 if (ret != 0) {
891 syslog(LOG_ERR, "%lu %s", SM_PROG, clnt_sperrno(ret));
892 exit(1);
893 }
894
895 nsm_state = stat.state;
896
897 /* setup constant data for SM_MON calls */
898 mon_host.mon_id.my_id.my_name = localhost;
899 mon_host.mon_id.my_id.my_prog = NLM_PROG;
900 mon_host.mon_id.my_id.my_vers = NLM_SM;
901 mon_host.mon_id.my_id.my_proc = NLM_SM_NOTIFY; /* bsdi addition */
902 }
903
904 /*
905 * Out of memory, fatal
906 */
907 void
out_of_mem(void)908 out_of_mem(void)
909 {
910 syslog(LOG_ERR, "out of memory");
911 exit(2);
912 }
913