xref: /dragonfly/usr.sbin/rpcbind/rpcbind.c (revision 25a2db75) 
1 /*
2  * Sun RPC is a product of Sun Microsystems, Inc. and is provided for
3  * unrestricted use provided that this legend is included on all tape
4  * media and as a part of the software program in whole or part.  Users
5  * may copy or modify Sun RPC without charge, but are not authorized
6  * to license or distribute it to anyone else except as part of a product or
7  * program developed by the user.
8  *
9  * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
10  * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
11  * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
12  *
13  * Sun RPC is provided with no support and without any obligation on the
14  * part of Sun Microsystems, Inc. to assist in its use, correction,
15  * modification or enhancement.
16  *
17  * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
18  * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
19  * OR ANY PART THEREOF.
20  *
21  * In no event will Sun Microsystems, Inc. be liable for any lost revenue
22  * or profits or other special, indirect and consequential damages, even if
23  * Sun has been advised of the possibility of such damages.
24  *
25  * Sun Microsystems, Inc.
26  * 2550 Garcia Avenue
27  * Mountain View, California  94043
28  *
29  * @(#)rpcbind.c	1.19	94/04/25 SMI; 1.35 89/04/21 Copyr 1984 Sun Micro
30  * $NetBSD: rpcbind.c,v 1.3 2002/11/08 00:16:40 fvdl Exp $
31  * $FreeBSD: src/usr.sbin/rpcbind/rpcbind.c,v 1.20 2008/02/14 20:12:23 yar Exp $
32  */
33 /*
34  * Copyright (c) 1984 - 1991 by Sun Microsystems, Inc.
35  */
36 
37 /*
38  * rpcbind.c
39  * Implements the program, version to address mapping for rpc.
40  *
41  */
42 
43 #include <sys/types.h>
44 #include <sys/stat.h>
45 #include <sys/errno.h>
46 #include <sys/time.h>
47 #include <sys/resource.h>
48 #include <sys/wait.h>
49 #include <sys/signal.h>
50 #include <sys/socket.h>
51 #include <sys/un.h>
52 #include <rpc/rpc.h>
53 #include <rpc/rpc_com.h>
54 #ifdef PORTMAP
55 #include <netinet/in.h>
56 #endif
57 #include <arpa/inet.h>
58 #include <fcntl.h>
59 #include <netdb.h>
60 #include <stdio.h>
61 #include <netconfig.h>
62 #include <stdlib.h>
63 #include <unistd.h>
64 #include <syslog.h>
65 #include <err.h>
66 #include <libutil.h>
67 #include <pwd.h>
68 #include <string.h>
69 #include <errno.h>
70 #include "rpcbind.h"
71 
72 /* Global variables */
73 int debugging = 0;	/* Tell me what's going on */
74 int doabort = 0;	/* When debugging, do an abort on errors */
75 rpcblist_ptr list_rbl;	/* A list of version 3/4 rpcbind services */
76 
77 /* who to suid to if -s is given */
78 #define RUN_AS  "daemon"
79 
80 #define RPCBINDDLOCK "/var/run/rpcbind.lock"
81 
82 int runasdaemon = 0;
83 int insecure = 0;
84 int oldstyle_local = 0;
85 int verboselog = 0;
86 
87 char **hosts = NULL;
88 int ipv6_only = 0;
89 int nhosts = 0;
90 int on = 1;
91 int rpcbindlockfd;
92 
93 #ifdef WARMSTART
94 /* Local Variable */
95 static int warmstart = 0;	/* Grab an old copy of registrations. */
96 #endif
97 
98 #ifdef PORTMAP
99 struct pmaplist *list_pml;	/* A list of version 2 rpcbind services */
100 char *udptrans;		/* Name of UDP transport */
101 char *tcptrans;		/* Name of TCP transport */
102 char *udp_uaddr;	/* Universal UDP address */
103 char *tcp_uaddr;	/* Universal TCP address */
104 #endif
105 static char servname[] = "rpcbind";
106 static char superuser[] = "superuser";
107 
108 static int	init_transport(struct netconfig *);
109 static void	rbllist_add(rpcprog_t, rpcvers_t, struct netconfig *,
110 			    struct netbuf *);
111 static void	terminate(int);
112 static void	parseargs(int, char *[]);
113 
114 int
115 main(int argc, char *argv[])
116 {
117 	struct netconfig *nconf;
118 	void *nc_handle;	/* Net config handle */
119 	struct rlimit rl;
120 	int maxrec = RPC_MAXDATASIZE;
121 
122 	parseargs(argc, argv);
123 
124 	/* Check that another rpcbind isn't already running. */
125 	if ((rpcbindlockfd = (open(RPCBINDDLOCK,
126 	    O_RDONLY|O_CREAT, 0444))) == -1)
127 		err(1, "%s", RPCBINDDLOCK);
128 
129 	if(flock(rpcbindlockfd, LOCK_EX|LOCK_NB) == -1 && errno == EWOULDBLOCK)
130 		errx(1, "another rpcbind is already running. Aborting");
131 
132 	getrlimit(RLIMIT_NOFILE, &rl);
133 	if (rl.rlim_cur < 128) {
134 		if (rl.rlim_max <= 128)
135 			rl.rlim_cur = rl.rlim_max;
136 		else
137 			rl.rlim_cur = 128;
138 		setrlimit(RLIMIT_NOFILE, &rl);
139 	}
140 	openlog("rpcbind", LOG_CONS, LOG_DAEMON);
141 	if (geteuid()) { /* This command allowed only to root */
142 		fprintf(stderr, "Sorry. You are not superuser\n");
143 		exit(1);
144 	}
145 	nc_handle = setnetconfig(); 	/* open netconfig file */
146 	if (nc_handle == NULL) {
147 		syslog(LOG_ERR, "could not read /etc/netconfig");
148 		exit(1);
149 	}
150 #ifdef PORTMAP
151 	udptrans = "";
152 	tcptrans = "";
153 #endif
154 
155 	nconf = getnetconfigent("local");
156 	if (nconf == NULL)
157 		nconf = getnetconfigent("unix");
158 	if (nconf == NULL) {
159 		syslog(LOG_ERR, "%s: can't find local transport\n", argv[0]);
160 		exit(1);
161 	}
162 
163 	rpc_control(RPC_SVC_CONNMAXREC_SET, &maxrec);
164 
165 	init_transport(nconf);
166 
167 	while ((nconf = getnetconfig(nc_handle))) {
168 	    if (nconf->nc_flag & NC_VISIBLE)
169 		if (ipv6_only == 1 && strcmp(nconf->nc_protofmly,
170 		    "inet") == 0) {
171 		    /* DO NOTHING */
172 		} else
173 		    init_transport(nconf);
174 	}
175 	endnetconfig(nc_handle);
176 
177 	/* catch the usual termination signals for graceful exit */
178 	signal(SIGCHLD, reap);
179 	signal(SIGINT, terminate);
180 	signal(SIGTERM, terminate);
181 	signal(SIGQUIT, terminate);
182 	/* ignore others that could get sent */
183 	signal(SIGPIPE, SIG_IGN);
184 	signal(SIGHUP, SIG_IGN);
185 	signal(SIGUSR1, SIG_IGN);
186 	signal(SIGUSR2, SIG_IGN);
187 #ifdef WARMSTART
188 	if (warmstart) {
189 		read_warmstart();
190 	}
191 #endif
192 	if (debugging) {
193 		printf("rpcbind debugging enabled.");
194 		if (doabort) {
195 			printf("  Will abort on errors!\n");
196 		} else {
197 			printf("\n");
198 		}
199 	} else {
200 		if (daemon(0, 0))
201 			err(1, "fork failed");
202 	}
203 
204 	if (runasdaemon) {
205 		struct passwd *p;
206 
207 		if((p = getpwnam(RUN_AS)) == NULL) {
208 			syslog(LOG_ERR, "cannot get uid of daemon: %m");
209 			exit(1);
210 		}
211 		if (setuid(p->pw_uid) == -1) {
212 			syslog(LOG_ERR, "setuid to daemon failed: %m");
213 			exit(1);
214 		}
215 	}
216 
217 	network_init();
218 
219 	my_svc_run();
220 	syslog(LOG_ERR, "svc_run returned unexpectedly");
221 	rpcbind_abort();
222 	/* NOTREACHED */
223 
224 	return 0;
225 }
226 
227 /*
228  * Adds the entry into the rpcbind database.
229  * If PORTMAP, then for UDP and TCP, it adds the entries for version 2 also
230  * Returns 0 if succeeds, else fails
231  */
232 static int
233 init_transport(struct netconfig *nconf)
234 {
235 	int fd;
236 	struct t_bind taddr;
237 	struct addrinfo hints, *res = NULL;
238 	struct __rpc_sockinfo si;
239 	SVCXPRT	*my_xprt;
240 	int status;	/* bound checking ? */
241 	int aicode;
242 	int addrlen;
243 	int nhostsbak;
244 	int bound;
245 	struct sockaddr *sa;
246 	u_int32_t host_addr[4];  /* IPv4 or IPv6 */
247 	struct sockaddr_un sun;
248 	mode_t oldmask;
249 
250 	if ((nconf->nc_semantics != NC_TPI_CLTS) &&
251 	    (nconf->nc_semantics != NC_TPI_COTS) &&
252 	    (nconf->nc_semantics != NC_TPI_COTS_ORD))
253 	    return (1);	/* not my type */
254 #ifdef ND_DEBUG
255 	if (debugging) {
256 	    int i;
257 	    char **s;
258 
259 	    fprintf(stderr, "%s: %ld lookup routines :\n",
260 		nconf->nc_netid, nconf->nc_nlookups);
261 	    for (i = 0, s = nconf->nc_lookups; i < nconf->nc_nlookups;
262 		i++, s++)
263 		fprintf(stderr, "[%d] - %s\n", i, *s);
264 	}
265 #endif
266 
267 	/*
268 	 * XXX - using RPC library internal functions.
269 	 */
270 	if ((strcmp(nconf->nc_netid, "local") == 0) ||
271 	    (strcmp(nconf->nc_netid, "unix") == 0)) {
272 	    /*
273 	     * For other transports we call this later, for each socket we
274 	     * like to bind.
275 	     */
276 	    if ((fd = __rpc_nconf2fd(nconf)) < 0) {
277 		int non_fatal = 0;
278 		if (errno == EPROTONOSUPPORT)
279 		    non_fatal = 1;
280 		syslog(non_fatal?LOG_DEBUG:LOG_ERR, "cannot create socket for %s",
281 		    nconf->nc_netid);
282 		return (1);
283 	    }
284 	}
285 
286 	if (!__rpc_nconf2sockinfo(nconf, &si)) {
287 	    syslog(LOG_ERR, "cannot get information for %s",
288 		nconf->nc_netid);
289 	    return (1);
290 	}
291 
292 	if ((strcmp(nconf->nc_netid, "local") == 0) ||
293 	    (strcmp(nconf->nc_netid, "unix") == 0)) {
294 	    memset(&sun, 0, sizeof sun);
295 	    sun.sun_family = AF_LOCAL;
296 	    unlink(_PATH_RPCBINDSOCK);
297 	    strcpy(sun.sun_path, _PATH_RPCBINDSOCK);
298 	    sun.sun_len = SUN_LEN(&sun);
299 	    addrlen = sizeof (struct sockaddr_un);
300 	    sa = (struct sockaddr *)&sun;
301 	} else {
302 	    /* Get rpcbind's address on this transport */
303 
304 	    memset(&hints, 0, sizeof hints);
305 	    hints.ai_flags = AI_PASSIVE;
306 	    hints.ai_family = si.si_af;
307 	    hints.ai_socktype = si.si_socktype;
308 	    hints.ai_protocol = si.si_proto;
309 	}
310 
311 	if ((strcmp(nconf->nc_netid, "local") != 0) &&
312 	    (strcmp(nconf->nc_netid, "unix") != 0)) {
313 	    /*
314 	     * If no hosts were specified, just bind to INADDR_ANY.
315 	     * Otherwise  make sure 127.0.0.1 is added to the list.
316 	     */
317 	    nhostsbak = nhosts;
318 	    nhostsbak++;
319 	    hosts = realloc(hosts, nhostsbak * sizeof(char *));
320 	    if (nhostsbak == 1)
321 	        hosts[0] = "*";
322 	    else {
323 		if (hints.ai_family == AF_INET) {
324 		    hosts[nhostsbak - 1] = "127.0.0.1";
325 		} else if (hints.ai_family == AF_INET6) {
326 		    hosts[nhostsbak - 1] = "::1";
327 		} else
328 		    return 1;
329 	    }
330 
331 	    /*
332 	     * Bind to specific IPs if asked to
333 	     */
334 	    bound = 0;
335 	    while (nhostsbak > 0) {
336 		--nhostsbak;
337 		/*
338 		 * XXX - using RPC library internal functions.
339 		 */
340 		if ((fd = __rpc_nconf2fd(nconf)) < 0) {
341 		    int non_fatal = 0;
342 		    if (errno == EPROTONOSUPPORT &&
343 			nconf->nc_semantics != NC_TPI_CLTS)
344 			non_fatal = 1;
345 		    syslog(non_fatal ? LOG_DEBUG : LOG_ERR,
346 			"cannot create socket for %s", nconf->nc_netid);
347 		    return (1);
348 		}
349 		switch (hints.ai_family) {
350 		case AF_INET:
351 		    if (inet_pton(AF_INET, hosts[nhostsbak],
352 			host_addr) == 1) {
353 			hints.ai_flags &= AI_NUMERICHOST;
354 		    } else {
355 			/*
356 			 * Skip if we have an AF_INET6 address.
357 			 */
358 			if (inet_pton(AF_INET6,
359 			    hosts[nhostsbak], host_addr) == 1) {
360 			    close(fd);
361 			    continue;
362 			}
363 		    }
364 		    break;
365 		case AF_INET6:
366 		    if (inet_pton(AF_INET6, hosts[nhostsbak],
367 			host_addr) == 1) {
368 			hints.ai_flags &= AI_NUMERICHOST;
369 		    } else {
370 			/*
371 			 * Skip if we have an AF_INET address.
372 			 */
373 			if (inet_pton(AF_INET, hosts[nhostsbak],
374 			    host_addr) == 1) {
375 				close(fd);
376 				continue;
377 			}
378 		    }
379 		    if (setsockopt(fd, IPPROTO_IPV6,
380 			IPV6_V6ONLY, &on, sizeof on) < 0) {
381 			syslog(LOG_ERR,
382 			    "can't set v6-only binding for "
383 			    "ipv6 socket: %m");
384 			continue;
385 		    }
386 		    break;
387 		default:
388 		    break;
389 		}
390 
391 		/*
392 		 * If no hosts were specified, just bind to INADDR_ANY
393 		 */
394 		if (strcmp("*", hosts[nhostsbak]) == 0)
395 		    hosts[nhostsbak] = NULL;
396 		if ((strcmp(nconf->nc_netid, "local") != 0) &&
397 		    (strcmp(nconf->nc_netid, "unix") != 0)) {
398 		    if ((aicode = getaddrinfo(hosts[nhostsbak],
399 			servname, &hints, &res)) != 0) {
400 			syslog(LOG_ERR,
401 			    "cannot get local address for %s: %s",
402 			    nconf->nc_netid, gai_strerror(aicode));
403 			continue;
404 		    }
405 		    addrlen = res->ai_addrlen;
406 		    sa = (struct sockaddr *)res->ai_addr;
407 		}
408 		oldmask = umask(S_IXUSR|S_IXGRP|S_IXOTH);
409 		if (bind(fd, sa, addrlen) != 0) {
410 		    syslog(LOG_ERR, "cannot bind %s on %s: %m",
411 			(hosts[nhostsbak] == NULL) ? "*" :
412 			    hosts[nhostsbak], nconf->nc_netid);
413 		    if (res != NULL)
414 			freeaddrinfo(res);
415 		    continue;
416 		} else
417 		    bound = 1;
418 		umask(oldmask);
419 
420 		/* Copy the address */
421 		taddr.addr.len = taddr.addr.maxlen = addrlen;
422 		taddr.addr.buf = malloc(addrlen);
423 		if (taddr.addr.buf == NULL) {
424 		    syslog(LOG_ERR,
425 			"cannot allocate memory for %s address",
426 			nconf->nc_netid);
427 		    if (res != NULL)
428 			freeaddrinfo(res);
429 		    return 1;
430 		}
431 		memcpy(taddr.addr.buf, sa, addrlen);
432 #ifdef ND_DEBUG
433 		if (debugging) {
434 		    /*
435 		     * for debugging print out our universal
436 		     * address
437 		     */
438 		    char *uaddr;
439 		    struct netbuf nb;
440 
441 		    nb.buf = sa;
442 		    nb.len = nb.maxlen = sa->sa_len;
443 		    uaddr = taddr2uaddr(nconf, &nb);
444 		    fprintf(stderr, "rpcbind : my address is %s\n", uaddr);
445 		    free(uaddr);
446 		}
447 #endif
448 
449 		if (nconf->nc_semantics != NC_TPI_CLTS)
450 		    listen(fd, SOMAXCONN);
451 
452 		my_xprt = (SVCXPRT *)svc_tli_create(fd, nconf, &taddr,
453 		    RPC_MAXDATASIZE, RPC_MAXDATASIZE);
454 		if (my_xprt == NULL) {
455 		    syslog(LOG_ERR, "%s: could not create service",
456 			nconf->nc_netid);
457 		    goto error;
458 		}
459 	    }
460 	    if (!bound)
461 		return 1;
462 	} else {
463 	    oldmask = umask(S_IXUSR|S_IXGRP|S_IXOTH);
464 	    if (bind(fd, sa, addrlen) < 0) {
465 		syslog(LOG_ERR, "cannot bind %s: %m", nconf->nc_netid);
466 		if (res != NULL)
467 		    freeaddrinfo(res);
468 		return 1;
469 	    }
470 	    umask(oldmask);
471 
472 	    /* Copy the address */
473 	    taddr.addr.len = taddr.addr.maxlen = addrlen;
474 	    taddr.addr.buf = malloc(addrlen);
475 	    if (taddr.addr.buf == NULL) {
476 		syslog(LOG_ERR, "cannot allocate memory for %s address",
477 		    nconf->nc_netid);
478 		if (res != NULL)
479 		    freeaddrinfo(res);
480 		return 1;
481 	    }
482 	    memcpy(taddr.addr.buf, sa, addrlen);
483 #ifdef ND_DEBUG
484 	    if (debugging) {
485 		/* for debugging print out our universal address */
486 		char *uaddr;
487 		struct netbuf nb;
488 
489 		nb.buf = sa;
490 		nb.len = nb.maxlen = sa->sa_len;
491 		uaddr = taddr2uaddr(nconf, &nb);
492 		fprintf(stderr, "rpcbind : my address is %s\n", uaddr);
493 		free(uaddr);
494 	    }
495 #endif
496 
497 	    if (nconf->nc_semantics != NC_TPI_CLTS)
498 		listen(fd, SOMAXCONN);
499 
500 	    my_xprt = (SVCXPRT *)svc_tli_create(fd, nconf, &taddr,
501 		RPC_MAXDATASIZE, RPC_MAXDATASIZE);
502 	    if (my_xprt == NULL) {
503 		syslog(LOG_ERR, "%s: could not create service",
504 		    nconf->nc_netid);
505 		goto error;
506 	    }
507 	}
508 
509 #ifdef PORTMAP
510 	/*
511 	 * Register both the versions for tcp/ip, udp/ip and local.
512 	 */
513 	if ((strcmp(nconf->nc_protofmly, NC_INET) == 0 &&
514 		(strcmp(nconf->nc_proto, NC_TCP) == 0 ||
515 		strcmp(nconf->nc_proto, NC_UDP) == 0)) ||
516 		(strcmp(nconf->nc_netid, "unix") == 0) ||
517 		(strcmp(nconf->nc_netid, "local") == 0)) {
518 		struct pmaplist *pml;
519 
520 		if (!svc_register(my_xprt, PMAPPROG, PMAPVERS,
521 			pmap_service, 0)) {
522 			syslog(LOG_ERR, "could not register on %s",
523 					nconf->nc_netid);
524 			goto error;
525 		}
526 		pml = malloc(sizeof (struct pmaplist));
527 		if (pml == NULL) {
528 			syslog(LOG_ERR, "no memory!");
529 			exit(1);
530 		}
531 		pml->pml_map.pm_prog = PMAPPROG;
532 		pml->pml_map.pm_vers = PMAPVERS;
533 		pml->pml_map.pm_port = PMAPPORT;
534 		if (strcmp(nconf->nc_proto, NC_TCP) == 0) {
535 			if (tcptrans[0]) {
536 				syslog(LOG_ERR,
537 				"cannot have more than one TCP transport");
538 				goto error;
539 			}
540 			tcptrans = strdup(nconf->nc_netid);
541 			pml->pml_map.pm_prot = IPPROTO_TCP;
542 
543 			/* Let's snarf the universal address */
544 			/* "h1.h2.h3.h4.p1.p2" */
545 			tcp_uaddr = taddr2uaddr(nconf, &taddr.addr);
546 		} else if (strcmp(nconf->nc_proto, NC_UDP) == 0) {
547 			if (udptrans[0]) {
548 				syslog(LOG_ERR,
549 				"cannot have more than one UDP transport");
550 				goto error;
551 			}
552 			udptrans = strdup(nconf->nc_netid);
553 			pml->pml_map.pm_prot = IPPROTO_UDP;
554 
555 			/* Let's snarf the universal address */
556 			/* "h1.h2.h3.h4.p1.p2" */
557 			udp_uaddr = taddr2uaddr(nconf, &taddr.addr);
558 		} else if (strcmp(nconf->nc_netid, "local") == 0)
559 			pml->pml_map.pm_prot = IPPROTO_ST;
560 		else if (strcmp(nconf->nc_netid, "unix") == 0)
561 			pml->pml_map.pm_prot = IPPROTO_ST;
562 		pml->pml_next = list_pml;
563 		list_pml = pml;
564 
565 		/* Add version 3 information */
566 		pml = malloc(sizeof (struct pmaplist));
567 		if (pml == NULL) {
568 			syslog(LOG_ERR, "no memory!");
569 			exit(1);
570 		}
571 		pml->pml_map = list_pml->pml_map;
572 		pml->pml_map.pm_vers = RPCBVERS;
573 		pml->pml_next = list_pml;
574 		list_pml = pml;
575 
576 		/* Add version 4 information */
577 		pml = malloc (sizeof (struct pmaplist));
578 		if (pml == NULL) {
579 			syslog(LOG_ERR, "no memory!");
580 			exit(1);
581 		}
582 		pml->pml_map = list_pml->pml_map;
583 		pml->pml_map.pm_vers = RPCBVERS4;
584 		pml->pml_next = list_pml;
585 		list_pml = pml;
586 
587 		/* Also add version 2 stuff to rpcbind list */
588 		rbllist_add(PMAPPROG, PMAPVERS, nconf, &taddr.addr);
589 	}
590 #endif
591 
592 	/* version 3 registration */
593 	if (!svc_reg(my_xprt, RPCBPROG, RPCBVERS, rpcb_service_3, NULL)) {
594 		syslog(LOG_ERR, "could not register %s version 3",
595 				nconf->nc_netid);
596 		goto error;
597 	}
598 	rbllist_add(RPCBPROG, RPCBVERS, nconf, &taddr.addr);
599 
600 	/* version 4 registration */
601 	if (!svc_reg(my_xprt, RPCBPROG, RPCBVERS4, rpcb_service_4, NULL)) {
602 		syslog(LOG_ERR, "could not register %s version 4",
603 				nconf->nc_netid);
604 		goto error;
605 	}
606 	rbllist_add(RPCBPROG, RPCBVERS4, nconf, &taddr.addr);
607 
608 	/* decide if bound checking works for this transport */
609 	status = add_bndlist(nconf, &taddr.addr);
610 #ifdef BIND_DEBUG
611 	if (debugging) {
612 		if (status < 0) {
613 			fprintf(stderr, "Error in finding bind status for %s\n",
614 				nconf->nc_netid);
615 		} else if (status == 0) {
616 			fprintf(stderr, "check binding for %s\n",
617 				nconf->nc_netid);
618 		} else if (status > 0) {
619 			fprintf(stderr, "No check binding for %s\n",
620 				nconf->nc_netid);
621 		}
622 	}
623 #endif
624 	/*
625 	 * rmtcall only supported on CLTS transports for now.
626 	 */
627 	if (nconf->nc_semantics == NC_TPI_CLTS) {
628 		status = create_rmtcall_fd(nconf);
629 
630 #ifdef BIND_DEBUG
631 		if (debugging) {
632 			if (status < 0) {
633 				fprintf(stderr,
634 				    "Could not create rmtcall fd for %s\n",
635 					nconf->nc_netid);
636 			} else {
637 				fprintf(stderr, "rmtcall fd for %s is %d\n",
638 					nconf->nc_netid, status);
639 			}
640 		}
641 #endif
642 	}
643 	return (0);
644 error:
645 	close(fd);
646 	return (1);
647 }
648 
649 static void
650 rbllist_add(rpcprog_t prog, rpcvers_t vers, struct netconfig *nconf,
651 	    struct netbuf *addr)
652 {
653 	rpcblist_ptr rbl;
654 
655 	rbl = malloc(sizeof (rpcblist));
656 	if (rbl == NULL) {
657 		syslog(LOG_ERR, "no memory!");
658 		exit(1);
659 	}
660 
661 	rbl->rpcb_map.r_prog = prog;
662 	rbl->rpcb_map.r_vers = vers;
663 	rbl->rpcb_map.r_netid = strdup(nconf->nc_netid);
664 	rbl->rpcb_map.r_addr = taddr2uaddr(nconf, addr);
665 	rbl->rpcb_map.r_owner = strdup(superuser);
666 	rbl->rpcb_next = list_rbl;	/* Attach to global list */
667 	list_rbl = rbl;
668 }
669 
670 /*
671  * Catch the signal and die
672  */
673 static void
674 terminate(int dummy __unused)
675 {
676 	close(rpcbindlockfd);
677 #ifdef WARMSTART
678 	syslog(LOG_ERR,
679 		"rpcbind terminating on signal. Restart with \"rpcbind -w\"");
680 	write_warmstart();	/* Dump yourself */
681 #endif
682 	exit(2);
683 }
684 
685 void
686 rpcbind_abort(void)
687 {
688 #ifdef WARMSTART
689 	write_warmstart();	/* Dump yourself */
690 #endif
691 	abort();
692 }
693 
694 /* get command line options */
695 static void
696 parseargs(int argc, char *argv[])
697 {
698 	int c;
699 
700 #ifdef WARMSTART
701 #define	WSOP	"w"
702 #else
703 #define	WSOP	""
704 #endif
705 	while ((c = getopt(argc, argv, "6adh:iLls" WSOP)) != -1) {
706 		switch (c) {
707 		case '6':
708 			ipv6_only = 1;
709 			break;
710 		case 'a':
711 			doabort = 1;	/* when debugging, do an abort on */
712 			break;		/* errors; for rpcbind developers */
713 					/* only! */
714 		case 'd':
715 			debugging = 1;
716 			break;
717 		case 'h':
718 			++nhosts;
719 			hosts = realloc(hosts, nhosts * sizeof(char *));
720 			if (hosts == NULL)
721 				errx(1, "Out of memory");
722 			hosts[nhosts - 1] = strdup(optarg);
723 			if (hosts[nhosts - 1] == NULL)
724 				errx(1, "Out of memory");
725 			break;
726 		case 'i':
727 			insecure = 1;
728 			break;
729 		case 'L':
730 			oldstyle_local = 1;
731 			break;
732 		case 'l':
733 			verboselog = 1;
734 			break;
735 		case 's':
736 			runasdaemon = 1;
737 			break;
738 #ifdef WARMSTART
739 		case 'w':
740 			warmstart = 1;
741 			break;
742 #endif
743 		default:	/* error */
744 			fprintf(stderr,
745 			    "usage: rpcbind [-6adiLls%s] [-h bindip]\n",
746 			    WSOP);
747 			exit (1);
748 		}
749 	}
750 	if (doabort && !debugging) {
751 	    fprintf(stderr,
752 		"-a (abort) specified without -d (debugging) -- ignored.\n");
753 	    doabort = 0;
754 	}
755 #undef WSOP
756 }
757 
758 void
759 reap(int dummy __unused)
760 {
761 	int save_errno = errno;
762 
763 	while (wait3(NULL, WNOHANG, NULL) > 0)
764 		;
765 	errno = save_errno;
766 }
767 
768 void
769 toggle_verboselog(int dummy __unused)
770 {
771 	verboselog = !verboselog;
772 }
773