2 * Copyright (c) 2009, Sun Microsystems, Inc.
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6 * modification, are permitted provided that the following conditions are met:
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28 * @(#)rpcbind.c 1.19 94/04/25 SMI; 1.35 89/04/21 Copyr 1984 Sun Micro
29 * $NetBSD: rpcbind.c,v 1.3 2002/11/08 00:16:40 fvdl Exp $
30 * $FreeBSD: src/usr.sbin/rpcbind/rpcbind.c,v 1.20 2008/02/14 20:12:23 yar Exp $
33 * Copyright (c) 1984 - 1991 by Sun Microsystems, Inc.
38 * Implements the program, version to address mapping for rpc.
42 #include <sys/types.h>
44 #include <sys/errno.h>
46 #include <sys/resource.h>
48 #include <sys/signal.h>
49 #include <sys/socket.h>
52 #include <rpc/rpc_com.h>
54 #include <netinet/in.h>
56 #include <arpa/inet.h>
60 #include <netconfig.h>
71 /* Global variables */
72 int debugging = 0; /* Tell me what's going on */
73 int doabort = 0; /* When debugging, do an abort on errors */
74 rpcblist_ptr list_rbl; /* A list of version 3/4 rpcbind services */
76 /* who to suid to if -s is given */
77 #define RUN_AS "daemon"
79 #define RPCBINDDLOCK "/var/run/rpcbind.lock"
83 int oldstyle_local = 0;
94 static int warmstart = 0; /* Grab an old copy of registrations. */
98 struct pmaplist *list_pml; /* A list of version 2 rpcbind services */
99 char *udptrans; /* Name of UDP transport */
100 char *tcptrans; /* Name of TCP transport */
101 char *udp_uaddr; /* Universal UDP address */
102 char *tcp_uaddr; /* Universal TCP address */
104 static char servname[] = "rpcbind";
105 static char superuser[] = "superuser";
107 static int init_transport(struct netconfig *);
108 static void rbllist_add(rpcprog_t, rpcvers_t, struct netconfig *,
110 static void terminate(int);
111 static void parseargs(int, char *[]);
114 main(int argc, char *argv[])
116 struct netconfig *nconf;
117 void *nc_handle; /* Net config handle */
119 int maxrec = RPC_MAXDATASIZE;
121 parseargs(argc, argv);
123 /* Check that another rpcbind isn't already running. */
124 if ((rpcbindlockfd = (open(RPCBINDDLOCK,
125 O_RDONLY|O_CREAT, 0444))) == -1)
126 err(1, "%s", RPCBINDDLOCK);
128 if(flock(rpcbindlockfd, LOCK_EX|LOCK_NB) == -1 && errno == EWOULDBLOCK)
129 errx(1, "another rpcbind is already running. Aborting");
131 getrlimit(RLIMIT_NOFILE, &rl);
132 if (rl.rlim_cur < 128) {
133 if (rl.rlim_max <= 128)
134 rl.rlim_cur = rl.rlim_max;
137 setrlimit(RLIMIT_NOFILE, &rl);
139 openlog("rpcbind", LOG_CONS, LOG_DAEMON);
140 if (geteuid()) { /* This command allowed only to root */
141 fprintf(stderr, "Sorry. You are not superuser\n");
144 nc_handle = setnetconfig(); /* open netconfig file */
145 if (nc_handle == NULL) {
146 syslog(LOG_ERR, "could not read /etc/netconfig");
154 nconf = getnetconfigent("local");
156 nconf = getnetconfigent("unix");
158 syslog(LOG_ERR, "%s: can't find local transport\n", argv[0]);
162 rpc_control(RPC_SVC_CONNMAXREC_SET, &maxrec);
164 init_transport(nconf);
166 while ((nconf = getnetconfig(nc_handle))) {
167 if (nconf->nc_flag & NC_VISIBLE)
168 if (ipv6_only != 1 || strcmp(nconf->nc_protofmly, "inet") != 0)
169 init_transport(nconf);
171 endnetconfig(nc_handle);
173 /* catch the usual termination signals for graceful exit */
174 signal(SIGCHLD, reap);
175 signal(SIGINT, terminate);
176 signal(SIGTERM, terminate);
177 signal(SIGQUIT, terminate);
178 /* ignore others that could get sent */
179 signal(SIGPIPE, SIG_IGN);
180 signal(SIGHUP, SIG_IGN);
181 signal(SIGUSR1, SIG_IGN);
182 signal(SIGUSR2, SIG_IGN);
189 printf("rpcbind debugging enabled.");
191 printf(" Will abort on errors!\n");
197 err(1, "fork failed");
203 if((p = getpwnam(RUN_AS)) == NULL) {
204 syslog(LOG_ERR, "cannot get uid of daemon: %m");
207 if (setuid(p->pw_uid) == -1) {
208 syslog(LOG_ERR, "setuid to daemon failed: %m");
216 syslog(LOG_ERR, "svc_run returned unexpectedly");
224 * Adds the entry into the rpcbind database.
225 * If PORTMAP, then for UDP and TCP, it adds the entries for version 2 also
226 * Returns 0 if succeeds, else fails
229 init_transport(struct netconfig *nconf)
233 struct addrinfo hints, *res = NULL;
234 struct __rpc_sockinfo si;
236 int status; /* bound checking ? */
242 u_int32_t host_addr[4]; /* IPv4 or IPv6 */
243 struct sockaddr_un sun;
246 if ((nconf->nc_semantics != NC_TPI_CLTS) &&
247 (nconf->nc_semantics != NC_TPI_COTS) &&
248 (nconf->nc_semantics != NC_TPI_COTS_ORD))
249 return (1); /* not my type */
255 fprintf(stderr, "%s: %ld lookup routines :\n",
256 nconf->nc_netid, nconf->nc_nlookups);
257 for (i = 0, s = nconf->nc_lookups; i < nconf->nc_nlookups;
259 fprintf(stderr, "[%d] - %s\n", i, *s);
264 * XXX - using RPC library internal functions.
266 if ((strcmp(nconf->nc_netid, "local") == 0) ||
267 (strcmp(nconf->nc_netid, "unix") == 0)) {
269 * For other transports we call this later, for each socket we
272 if ((fd = __rpc_nconf2fd(nconf)) < 0) {
274 if (errno == EPROTONOSUPPORT)
276 syslog(non_fatal?LOG_DEBUG:LOG_ERR, "cannot create socket for %s",
282 if (!__rpc_nconf2sockinfo(nconf, &si)) {
283 syslog(LOG_ERR, "cannot get information for %s",
288 if ((strcmp(nconf->nc_netid, "local") == 0) ||
289 (strcmp(nconf->nc_netid, "unix") == 0)) {
290 memset(&sun, 0, sizeof sun);
291 sun.sun_family = AF_LOCAL;
292 unlink(_PATH_RPCBINDSOCK);
293 strcpy(sun.sun_path, _PATH_RPCBINDSOCK);
294 sun.sun_len = SUN_LEN(&sun);
295 addrlen = sizeof (struct sockaddr_un);
296 sa = (struct sockaddr *)&sun;
298 /* Get rpcbind's address on this transport */
300 memset(&hints, 0, sizeof hints);
301 hints.ai_flags = AI_PASSIVE;
302 hints.ai_family = si.si_af;
303 hints.ai_socktype = si.si_socktype;
304 hints.ai_protocol = si.si_proto;
307 if ((strcmp(nconf->nc_netid, "local") != 0) &&
308 (strcmp(nconf->nc_netid, "unix") != 0)) {
310 * If no hosts were specified, just bind to INADDR_ANY.
311 * Otherwise make sure 127.0.0.1 is added to the list.
315 hosts = realloc(hosts, nhostsbak * sizeof(char *));
319 if (hints.ai_family == AF_INET) {
320 hosts[nhostsbak - 1] = "127.0.0.1";
321 } else if (hints.ai_family == AF_INET6) {
322 hosts[nhostsbak - 1] = "::1";
328 * Bind to specific IPs if asked to
331 while (nhostsbak > 0) {
334 * XXX - using RPC library internal functions.
336 if ((fd = __rpc_nconf2fd(nconf)) < 0) {
338 if (errno == EPROTONOSUPPORT &&
339 nconf->nc_semantics != NC_TPI_CLTS)
341 syslog(non_fatal ? LOG_DEBUG : LOG_ERR,
342 "cannot create socket for %s", nconf->nc_netid);
345 switch (hints.ai_family) {
347 if (inet_pton(AF_INET, hosts[nhostsbak],
349 hints.ai_flags &= AI_NUMERICHOST;
352 * Skip if we have an AF_INET6 address.
354 if (inet_pton(AF_INET6,
355 hosts[nhostsbak], host_addr) == 1) {
362 if (inet_pton(AF_INET6, hosts[nhostsbak],
364 hints.ai_flags &= AI_NUMERICHOST;
367 * Skip if we have an AF_INET address.
369 if (inet_pton(AF_INET, hosts[nhostsbak],
375 if (setsockopt(fd, IPPROTO_IPV6,
376 IPV6_V6ONLY, &on, sizeof on) < 0) {
378 "can't set v6-only binding for "
388 * If no hosts were specified, just bind to INADDR_ANY
390 if (strcmp("*", hosts[nhostsbak]) == 0)
391 hosts[nhostsbak] = NULL;
392 if ((strcmp(nconf->nc_netid, "local") != 0) &&
393 (strcmp(nconf->nc_netid, "unix") != 0)) {
394 if ((aicode = getaddrinfo(hosts[nhostsbak],
395 servname, &hints, &res)) != 0) {
397 "cannot get local address for %s: %s",
398 nconf->nc_netid, gai_strerror(aicode));
401 addrlen = res->ai_addrlen;
402 sa = (struct sockaddr *)res->ai_addr;
404 oldmask = umask(S_IXUSR|S_IXGRP|S_IXOTH);
405 if (bind(fd, sa, addrlen) != 0) {
406 syslog(LOG_ERR, "cannot bind %s on %s: %m",
407 (hosts[nhostsbak] == NULL) ? "*" :
408 hosts[nhostsbak], nconf->nc_netid);
416 /* Copy the address */
417 taddr.addr.len = taddr.addr.maxlen = addrlen;
418 taddr.addr.buf = malloc(addrlen);
419 if (taddr.addr.buf == NULL) {
421 "cannot allocate memory for %s address",
427 memcpy(taddr.addr.buf, sa, addrlen);
431 * for debugging print out our universal
438 nb.len = nb.maxlen = sa->sa_len;
439 uaddr = taddr2uaddr(nconf, &nb);
440 fprintf(stderr, "rpcbind : my address is %s\n", uaddr);
445 if (nconf->nc_semantics != NC_TPI_CLTS)
446 listen(fd, SOMAXCONN);
448 my_xprt = (SVCXPRT *)svc_tli_create(fd, nconf, &taddr,
449 RPC_MAXDATASIZE, RPC_MAXDATASIZE);
450 if (my_xprt == NULL) {
451 syslog(LOG_ERR, "%s: could not create service",
459 oldmask = umask(S_IXUSR|S_IXGRP|S_IXOTH);
460 if (bind(fd, sa, addrlen) < 0) {
461 syslog(LOG_ERR, "cannot bind %s: %m", nconf->nc_netid);
468 /* Copy the address */
469 taddr.addr.len = taddr.addr.maxlen = addrlen;
470 taddr.addr.buf = malloc(addrlen);
471 if (taddr.addr.buf == NULL) {
472 syslog(LOG_ERR, "cannot allocate memory for %s address",
478 memcpy(taddr.addr.buf, sa, addrlen);
481 /* for debugging print out our universal address */
486 nb.len = nb.maxlen = sa->sa_len;
487 uaddr = taddr2uaddr(nconf, &nb);
488 fprintf(stderr, "rpcbind : my address is %s\n", uaddr);
493 if (nconf->nc_semantics != NC_TPI_CLTS)
494 listen(fd, SOMAXCONN);
496 my_xprt = (SVCXPRT *)svc_tli_create(fd, nconf, &taddr,
497 RPC_MAXDATASIZE, RPC_MAXDATASIZE);
498 if (my_xprt == NULL) {
499 syslog(LOG_ERR, "%s: could not create service",
507 * Register both the versions for tcp/ip, udp/ip and local.
509 if ((strcmp(nconf->nc_protofmly, NC_INET) == 0 &&
510 (strcmp(nconf->nc_proto, NC_TCP) == 0 ||
511 strcmp(nconf->nc_proto, NC_UDP) == 0)) ||
512 (strcmp(nconf->nc_netid, "unix") == 0) ||
513 (strcmp(nconf->nc_netid, "local") == 0)) {
514 struct pmaplist *pml;
516 if (!svc_register(my_xprt, PMAPPROG, PMAPVERS,
518 syslog(LOG_ERR, "could not register on %s",
522 pml = malloc(sizeof (struct pmaplist));
524 syslog(LOG_ERR, "no memory!");
527 pml->pml_map.pm_prog = PMAPPROG;
528 pml->pml_map.pm_vers = PMAPVERS;
529 pml->pml_map.pm_port = PMAPPORT;
530 if (strcmp(nconf->nc_proto, NC_TCP) == 0) {
533 "cannot have more than one TCP transport");
536 tcptrans = strdup(nconf->nc_netid);
537 pml->pml_map.pm_prot = IPPROTO_TCP;
539 /* Let's snarf the universal address */
540 /* "h1.h2.h3.h4.p1.p2" */
541 tcp_uaddr = taddr2uaddr(nconf, &taddr.addr);
542 } else if (strcmp(nconf->nc_proto, NC_UDP) == 0) {
545 "cannot have more than one UDP transport");
548 udptrans = strdup(nconf->nc_netid);
549 pml->pml_map.pm_prot = IPPROTO_UDP;
551 /* Let's snarf the universal address */
552 /* "h1.h2.h3.h4.p1.p2" */
553 udp_uaddr = taddr2uaddr(nconf, &taddr.addr);
554 } else if (strcmp(nconf->nc_netid, "local") == 0)
555 pml->pml_map.pm_prot = IPPROTO_ST;
556 else if (strcmp(nconf->nc_netid, "unix") == 0)
557 pml->pml_map.pm_prot = IPPROTO_ST;
558 pml->pml_next = list_pml;
561 /* Add version 3 information */
562 pml = malloc(sizeof (struct pmaplist));
564 syslog(LOG_ERR, "no memory!");
567 pml->pml_map = list_pml->pml_map;
568 pml->pml_map.pm_vers = RPCBVERS;
569 pml->pml_next = list_pml;
572 /* Add version 4 information */
573 pml = malloc (sizeof (struct pmaplist));
575 syslog(LOG_ERR, "no memory!");
578 pml->pml_map = list_pml->pml_map;
579 pml->pml_map.pm_vers = RPCBVERS4;
580 pml->pml_next = list_pml;
583 /* Also add version 2 stuff to rpcbind list */
584 rbllist_add(PMAPPROG, PMAPVERS, nconf, &taddr.addr);
588 /* version 3 registration */
589 if (!svc_reg(my_xprt, RPCBPROG, RPCBVERS, rpcb_service_3, NULL)) {
590 syslog(LOG_ERR, "could not register %s version 3",
594 rbllist_add(RPCBPROG, RPCBVERS, nconf, &taddr.addr);
596 /* version 4 registration */
597 if (!svc_reg(my_xprt, RPCBPROG, RPCBVERS4, rpcb_service_4, NULL)) {
598 syslog(LOG_ERR, "could not register %s version 4",
602 rbllist_add(RPCBPROG, RPCBVERS4, nconf, &taddr.addr);
604 /* decide if bound checking works for this transport */
605 status = add_bndlist(nconf, &taddr.addr);
609 fprintf(stderr, "Error in finding bind status for %s\n",
611 } else if (status == 0) {
612 fprintf(stderr, "check binding for %s\n",
614 } else if (status > 0) {
615 fprintf(stderr, "No check binding for %s\n",
621 * rmtcall only supported on CLTS transports for now.
623 if (nconf->nc_semantics == NC_TPI_CLTS) {
624 status = create_rmtcall_fd(nconf);
630 "Could not create rmtcall fd for %s\n",
633 fprintf(stderr, "rmtcall fd for %s is %d\n",
634 nconf->nc_netid, status);
646 rbllist_add(rpcprog_t prog, rpcvers_t vers, struct netconfig *nconf,
651 rbl = malloc(sizeof (rpcblist));
653 syslog(LOG_ERR, "no memory!");
657 rbl->rpcb_map.r_prog = prog;
658 rbl->rpcb_map.r_vers = vers;
659 rbl->rpcb_map.r_netid = strdup(nconf->nc_netid);
660 rbl->rpcb_map.r_addr = taddr2uaddr(nconf, addr);
661 rbl->rpcb_map.r_owner = strdup(superuser);
662 rbl->rpcb_next = list_rbl; /* Attach to global list */
667 * Catch the signal and die
670 terminate(int dummy __unused)
672 close(rpcbindlockfd);
675 "rpcbind terminating on signal. Restart with \"rpcbind -w\"");
676 write_warmstart(); /* Dump yourself */
685 write_warmstart(); /* Dump yourself */
690 /* get command line options */
692 parseargs(int argc, char *argv[])
701 while ((c = getopt(argc, argv, "6adh:iLls" WSOP)) != -1) {
707 doabort = 1; /* when debugging, do an abort on */
708 break; /* errors; for rpcbind developers */
715 hosts = realloc(hosts, nhosts * sizeof(char *));
717 errx(1, "Out of memory");
718 hosts[nhosts - 1] = strdup(optarg);
719 if (hosts[nhosts - 1] == NULL)
720 errx(1, "Out of memory");
741 "usage: rpcbind [-6adiLls%s] [-h bindip]\n",
746 if (doabort && !debugging) {
748 "-a (abort) specified without -d (debugging) -- ignored.\n");
755 reap(int dummy __unused)
757 int save_errno = errno;
759 while (wait3(NULL, WNOHANG, NULL) > 0)
765 toggle_verboselog(int dummy __unused)
767 verboselog = !verboselog;