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