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-rw-r--r--usr.sbin/rpcbind/rpcbind.c868
1 files changed, 868 insertions, 0 deletions
diff --git a/usr.sbin/rpcbind/rpcbind.c b/usr.sbin/rpcbind/rpcbind.c
new file mode 100644
index 0000000..67c7f7b
--- /dev/null
+++ b/usr.sbin/rpcbind/rpcbind.c
@@ -0,0 +1,868 @@
+/* $NetBSD: rpcbind.c,v 1.3 2002/11/08 00:16:40 fvdl Exp $ */
+/* $FreeBSD$ */
+
+/*-
+ * Copyright (c) 2009, Sun Microsystems, Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ * - Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright notice,
+ * this list of conditions and the following disclaimer in the documentation
+ * and/or other materials provided with the distribution.
+ * - Neither the name of Sun Microsystems, Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+/*
+ * Copyright (c) 1984 - 1991 by Sun Microsystems, Inc.
+ */
+
+/* #ident "@(#)rpcbind.c 1.19 94/04/25 SMI" */
+
+#if 0
+#ifndef lint
+static char sccsid[] = "@(#)rpcbind.c 1.35 89/04/21 Copyr 1984 Sun Micro";
+#endif
+#endif
+
+/*
+ * rpcbind.c
+ * Implements the program, version to address mapping for rpc.
+ *
+ */
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <sys/errno.h>
+#include <sys/time.h>
+#include <sys/resource.h>
+#include <sys/wait.h>
+#include <sys/signal.h>
+#include <sys/socket.h>
+#include <sys/un.h>
+#include <rpc/rpc.h>
+#include <rpc/rpc_com.h>
+#ifdef PORTMAP
+#include <netinet/in.h>
+#endif
+#include <arpa/inet.h>
+#include <fcntl.h>
+#include <netdb.h>
+#include <stdio.h>
+#include <netconfig.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <syslog.h>
+#include <err.h>
+#include <libutil.h>
+#include <pwd.h>
+#include <string.h>
+#include <errno.h>
+#include "rpcbind.h"
+
+/* Global variables */
+int debugging = 0; /* Tell me what's going on */
+int doabort = 0; /* When debugging, do an abort on errors */
+rpcblist_ptr list_rbl; /* A list of version 3/4 rpcbind services */
+
+/* who to suid to if -s is given */
+#define RUN_AS "daemon"
+
+#define RPCBINDDLOCK "/var/run/rpcbind.lock"
+
+int runasdaemon = 0;
+int insecure = 0;
+int oldstyle_local = 0;
+#ifdef LIBWRAP
+int libwrap = 0;
+#endif
+int verboselog = 0;
+
+char **hosts = NULL;
+struct sockaddr **bound_sa;
+int ipv6_only = 0;
+int nhosts = 0;
+int on = 1;
+int rpcbindlockfd;
+
+#ifdef WARMSTART
+/* Local Variable */
+static int warmstart = 0; /* Grab an old copy of registrations. */
+#endif
+
+#ifdef PORTMAP
+struct pmaplist *list_pml; /* A list of version 2 rpcbind services */
+char *udptrans; /* Name of UDP transport */
+char *tcptrans; /* Name of TCP transport */
+char *udp_uaddr; /* Universal UDP address */
+char *tcp_uaddr; /* Universal TCP address */
+#endif
+static char servname[] = "rpcbind";
+static char superuser[] = "superuser";
+
+int main(int, char *[]);
+
+static int init_transport(struct netconfig *);
+static void rbllist_add(rpcprog_t, rpcvers_t, struct netconfig *,
+ struct netbuf *);
+static void terminate(int);
+static void parseargs(int, char *[]);
+static void update_bound_sa(void);
+
+int
+main(int argc, char *argv[])
+{
+ struct netconfig *nconf;
+ void *nc_handle; /* Net config handle */
+ struct rlimit rl;
+ int maxrec = RPC_MAXDATASIZE;
+
+ parseargs(argc, argv);
+
+ update_bound_sa();
+
+ /* Check that another rpcbind isn't already running. */
+ if ((rpcbindlockfd = (open(RPCBINDDLOCK,
+ O_RDONLY|O_CREAT, 0444))) == -1)
+ err(1, "%s", RPCBINDDLOCK);
+
+ if(flock(rpcbindlockfd, LOCK_EX|LOCK_NB) == -1 && errno == EWOULDBLOCK)
+ errx(1, "another rpcbind is already running. Aborting");
+
+ getrlimit(RLIMIT_NOFILE, &rl);
+ if (rl.rlim_cur < 128) {
+ if (rl.rlim_max <= 128)
+ rl.rlim_cur = rl.rlim_max;
+ else
+ rl.rlim_cur = 128;
+ setrlimit(RLIMIT_NOFILE, &rl);
+ }
+ openlog("rpcbind", LOG_CONS, LOG_DAEMON);
+ if (geteuid()) { /* This command allowed only to root */
+ fprintf(stderr, "Sorry. You are not superuser\n");
+ exit(1);
+ }
+ nc_handle = setnetconfig(); /* open netconfig file */
+ if (nc_handle == NULL) {
+ syslog(LOG_ERR, "could not read /etc/netconfig");
+ exit(1);
+ }
+#ifdef PORTMAP
+ udptrans = "";
+ tcptrans = "";
+#endif
+
+ nconf = getnetconfigent("local");
+ if (nconf == NULL)
+ nconf = getnetconfigent("unix");
+ if (nconf == NULL) {
+ syslog(LOG_ERR, "%s: can't find local transport\n", argv[0]);
+ exit(1);
+ }
+
+ rpc_control(RPC_SVC_CONNMAXREC_SET, &maxrec);
+
+ init_transport(nconf);
+
+ while ((nconf = getnetconfig(nc_handle))) {
+ if (nconf->nc_flag & NC_VISIBLE) {
+ if (ipv6_only == 1 && strcmp(nconf->nc_protofmly,
+ "inet") == 0) {
+ /* DO NOTHING */
+ } else
+ init_transport(nconf);
+ }
+ }
+ endnetconfig(nc_handle);
+
+ /* catch the usual termination signals for graceful exit */
+ (void) signal(SIGCHLD, reap);
+ (void) signal(SIGINT, terminate);
+ (void) signal(SIGTERM, terminate);
+ (void) signal(SIGQUIT, terminate);
+ /* ignore others that could get sent */
+ (void) signal(SIGPIPE, SIG_IGN);
+ (void) signal(SIGHUP, SIG_IGN);
+ (void) signal(SIGUSR1, SIG_IGN);
+ (void) signal(SIGUSR2, SIG_IGN);
+#ifdef WARMSTART
+ if (warmstart) {
+ read_warmstart();
+ }
+#endif
+ if (debugging) {
+ printf("rpcbind debugging enabled.");
+ if (doabort) {
+ printf(" Will abort on errors!\n");
+ } else {
+ printf("\n");
+ }
+ } else {
+ if (daemon(0, 0))
+ err(1, "fork failed");
+ }
+
+ if (runasdaemon) {
+ struct passwd *p;
+
+ if((p = getpwnam(RUN_AS)) == NULL) {
+ syslog(LOG_ERR, "cannot get uid of daemon: %m");
+ exit(1);
+ }
+ if (setuid(p->pw_uid) == -1) {
+ syslog(LOG_ERR, "setuid to daemon failed: %m");
+ exit(1);
+ }
+ }
+
+ network_init();
+
+ my_svc_run();
+ syslog(LOG_ERR, "svc_run returned unexpectedly");
+ rpcbind_abort();
+ /* NOTREACHED */
+
+ return 0;
+}
+
+/*
+ * Adds the entry into the rpcbind database.
+ * If PORTMAP, then for UDP and TCP, it adds the entries for version 2 also
+ * Returns 0 if succeeds, else fails
+ */
+static int
+init_transport(struct netconfig *nconf)
+{
+ int fd;
+ struct t_bind taddr;
+ struct addrinfo hints, *res = NULL;
+ struct __rpc_sockinfo si;
+ SVCXPRT *my_xprt;
+ int status; /* bound checking ? */
+ int aicode;
+ int addrlen;
+ int nhostsbak;
+ int bound;
+ struct sockaddr *sa;
+ u_int32_t host_addr[4]; /* IPv4 or IPv6 */
+ struct sockaddr_un sun;
+ mode_t oldmask;
+
+ if ((nconf->nc_semantics != NC_TPI_CLTS) &&
+ (nconf->nc_semantics != NC_TPI_COTS) &&
+ (nconf->nc_semantics != NC_TPI_COTS_ORD))
+ return (1); /* not my type */
+#ifdef ND_DEBUG
+ if (debugging) {
+ int i;
+ char **s;
+
+ (void)fprintf(stderr, "%s: %ld lookup routines :\n",
+ nconf->nc_netid, nconf->nc_nlookups);
+ for (i = 0, s = nconf->nc_lookups; i < nconf->nc_nlookups;
+ i++, s++)
+ fprintf(stderr, "[%d] - %s\n", i, *s);
+ }
+#endif
+
+ /*
+ * XXX - using RPC library internal functions.
+ */
+ if ((strcmp(nconf->nc_netid, "local") == 0) ||
+ (strcmp(nconf->nc_netid, "unix") == 0)) {
+ /*
+ * For other transports we call this later, for each socket we
+ * like to bind.
+ */
+ if ((fd = __rpc_nconf2fd(nconf)) < 0) {
+ int non_fatal = 0;
+ if (errno == EAFNOSUPPORT)
+ non_fatal = 1;
+ syslog(non_fatal?LOG_DEBUG:LOG_ERR, "cannot create socket for %s",
+ nconf->nc_netid);
+ return (1);
+ }
+ }
+
+ if (!__rpc_nconf2sockinfo(nconf, &si)) {
+ syslog(LOG_ERR, "cannot get information for %s",
+ nconf->nc_netid);
+ return (1);
+ }
+
+ if ((strcmp(nconf->nc_netid, "local") == 0) ||
+ (strcmp(nconf->nc_netid, "unix") == 0)) {
+ memset(&sun, 0, sizeof sun);
+ sun.sun_family = AF_LOCAL;
+ unlink(_PATH_RPCBINDSOCK);
+ strcpy(sun.sun_path, _PATH_RPCBINDSOCK);
+ sun.sun_len = SUN_LEN(&sun);
+ addrlen = sizeof (struct sockaddr_un);
+ sa = (struct sockaddr *)&sun;
+ } else {
+ /* Get rpcbind's address on this transport */
+
+ memset(&hints, 0, sizeof hints);
+ hints.ai_flags = AI_PASSIVE;
+ hints.ai_family = si.si_af;
+ hints.ai_socktype = si.si_socktype;
+ hints.ai_protocol = si.si_proto;
+ }
+
+ if ((strcmp(nconf->nc_netid, "local") != 0) &&
+ (strcmp(nconf->nc_netid, "unix") != 0)) {
+ /*
+ * If no hosts were specified, just bind to INADDR_ANY.
+ * Otherwise make sure 127.0.0.1 is added to the list.
+ */
+ nhostsbak = nhosts + 1;
+ hosts = realloc(hosts, nhostsbak * sizeof(char *));
+ if (nhostsbak == 1)
+ hosts[0] = "*";
+ else {
+ if (hints.ai_family == AF_INET) {
+ hosts[nhostsbak - 1] = "127.0.0.1";
+ } else if (hints.ai_family == AF_INET6) {
+ hosts[nhostsbak - 1] = "::1";
+ } else
+ return 1;
+ }
+
+ /*
+ * Bind to specific IPs if asked to
+ */
+ bound = 0;
+ while (nhostsbak > 0) {
+ --nhostsbak;
+ /*
+ * XXX - using RPC library internal functions.
+ */
+ if ((fd = __rpc_nconf2fd(nconf)) < 0) {
+ int non_fatal = 0;
+ if (errno == EAFNOSUPPORT &&
+ nconf->nc_semantics != NC_TPI_CLTS)
+ non_fatal = 1;
+ syslog(non_fatal ? LOG_DEBUG : LOG_ERR,
+ "cannot create socket for %s", nconf->nc_netid);
+ return (1);
+ }
+ switch (hints.ai_family) {
+ case AF_INET:
+ if (inet_pton(AF_INET, hosts[nhostsbak],
+ host_addr) == 1) {
+ hints.ai_flags &= AI_NUMERICHOST;
+ } else {
+ /*
+ * Skip if we have an AF_INET6 address.
+ */
+ if (inet_pton(AF_INET6,
+ hosts[nhostsbak], host_addr) == 1) {
+ close(fd);
+ continue;
+ }
+ }
+ break;
+ case AF_INET6:
+ if (inet_pton(AF_INET6, hosts[nhostsbak],
+ host_addr) == 1) {
+ hints.ai_flags &= AI_NUMERICHOST;
+ } else {
+ /*
+ * Skip if we have an AF_INET address.
+ */
+ if (inet_pton(AF_INET, hosts[nhostsbak],
+ host_addr) == 1) {
+ close(fd);
+ continue;
+ }
+ }
+ if (setsockopt(fd, IPPROTO_IPV6,
+ IPV6_V6ONLY, &on, sizeof on) < 0) {
+ syslog(LOG_ERR,
+ "can't set v6-only binding for "
+ "ipv6 socket: %m");
+ continue;
+ }
+ break;
+ default:
+ break;
+ }
+
+ /*
+ * If no hosts were specified, just bind to INADDR_ANY
+ */
+ if (strcmp("*", hosts[nhostsbak]) == 0)
+ hosts[nhostsbak] = NULL;
+ if ((strcmp(nconf->nc_netid, "local") != 0) &&
+ (strcmp(nconf->nc_netid, "unix") != 0)) {
+ if ((aicode = getaddrinfo(hosts[nhostsbak],
+ servname, &hints, &res)) != 0) {
+ syslog(LOG_ERR,
+ "cannot get local address for %s: %s",
+ nconf->nc_netid, gai_strerror(aicode));
+ continue;
+ }
+ addrlen = res->ai_addrlen;
+ sa = (struct sockaddr *)res->ai_addr;
+ }
+ oldmask = umask(S_IXUSR|S_IXGRP|S_IXOTH);
+ if (bind(fd, sa, addrlen) != 0) {
+ syslog(LOG_ERR, "cannot bind %s on %s: %m",
+ (hosts[nhostsbak] == NULL) ? "*" :
+ hosts[nhostsbak], nconf->nc_netid);
+ if (res != NULL)
+ freeaddrinfo(res);
+ continue;
+ } else
+ bound = 1;
+ (void)umask(oldmask);
+
+ /* Copy the address */
+ taddr.addr.len = taddr.addr.maxlen = addrlen;
+ taddr.addr.buf = malloc(addrlen);
+ if (taddr.addr.buf == NULL) {
+ syslog(LOG_ERR,
+ "cannot allocate memory for %s address",
+ nconf->nc_netid);
+ if (res != NULL)
+ freeaddrinfo(res);
+ return 1;
+ }
+ memcpy(taddr.addr.buf, sa, addrlen);
+#ifdef ND_DEBUG
+ if (debugging) {
+ /*
+ * for debugging print out our universal
+ * address
+ */
+ char *uaddr;
+ struct netbuf nb;
+
+ nb.buf = sa;
+ nb.len = nb.maxlen = sa->sa_len;
+ uaddr = taddr2uaddr(nconf, &nb);
+ (void)fprintf(stderr,
+ "rpcbind : my address is %s\n", uaddr);
+ (void)free(uaddr);
+ }
+#endif
+
+ if (nconf->nc_semantics != NC_TPI_CLTS)
+ listen(fd, SOMAXCONN);
+
+ my_xprt = (SVCXPRT *)svc_tli_create(fd, nconf, &taddr,
+ RPC_MAXDATASIZE, RPC_MAXDATASIZE);
+ if (my_xprt == (SVCXPRT *)NULL) {
+ syslog(LOG_ERR, "%s: could not create service",
+ nconf->nc_netid);
+ goto error;
+ }
+ }
+ if (!bound)
+ return 1;
+ } else {
+ oldmask = umask(S_IXUSR|S_IXGRP|S_IXOTH);
+ if (bind(fd, sa, addrlen) < 0) {
+ syslog(LOG_ERR, "cannot bind %s: %m", nconf->nc_netid);
+ if (res != NULL)
+ freeaddrinfo(res);
+ return 1;
+ }
+ (void) umask(oldmask);
+
+ /* Copy the address */
+ taddr.addr.len = taddr.addr.maxlen = addrlen;
+ taddr.addr.buf = malloc(addrlen);
+ if (taddr.addr.buf == NULL) {
+ syslog(LOG_ERR, "cannot allocate memory for %s address",
+ nconf->nc_netid);
+ if (res != NULL)
+ freeaddrinfo(res);
+ return 1;
+ }
+ memcpy(taddr.addr.buf, sa, addrlen);
+#ifdef ND_DEBUG
+ if (debugging) {
+ /* for debugging print out our universal address */
+ char *uaddr;
+ struct netbuf nb;
+
+ nb.buf = sa;
+ nb.len = nb.maxlen = sa->sa_len;
+ uaddr = taddr2uaddr(nconf, &nb);
+ (void) fprintf(stderr, "rpcbind : my address is %s\n",
+ uaddr);
+ (void) free(uaddr);
+ }
+#endif
+
+ if (nconf->nc_semantics != NC_TPI_CLTS)
+ listen(fd, SOMAXCONN);
+
+ my_xprt = (SVCXPRT *)svc_tli_create(fd, nconf, &taddr,
+ RPC_MAXDATASIZE, RPC_MAXDATASIZE);
+ if (my_xprt == (SVCXPRT *)NULL) {
+ syslog(LOG_ERR, "%s: could not create service",
+ nconf->nc_netid);
+ goto error;
+ }
+ }
+
+#ifdef PORTMAP
+ /*
+ * Register both the versions for tcp/ip, udp/ip and local.
+ */
+ if ((strcmp(nconf->nc_protofmly, NC_INET) == 0 &&
+ (strcmp(nconf->nc_proto, NC_TCP) == 0 ||
+ strcmp(nconf->nc_proto, NC_UDP) == 0)) ||
+ (strcmp(nconf->nc_netid, "unix") == 0) ||
+ (strcmp(nconf->nc_netid, "local") == 0)) {
+ struct pmaplist *pml;
+
+ if (!svc_register(my_xprt, PMAPPROG, PMAPVERS,
+ pmap_service, 0)) {
+ syslog(LOG_ERR, "could not register on %s",
+ nconf->nc_netid);
+ goto error;
+ }
+ pml = malloc(sizeof (struct pmaplist));
+ if (pml == NULL) {
+ syslog(LOG_ERR, "no memory!");
+ exit(1);
+ }
+ pml->pml_map.pm_prog = PMAPPROG;
+ pml->pml_map.pm_vers = PMAPVERS;
+ pml->pml_map.pm_port = PMAPPORT;
+ if (strcmp(nconf->nc_proto, NC_TCP) == 0) {
+ if (tcptrans[0]) {
+ syslog(LOG_ERR,
+ "cannot have more than one TCP transport");
+ goto error;
+ }
+ tcptrans = strdup(nconf->nc_netid);
+ pml->pml_map.pm_prot = IPPROTO_TCP;
+
+ /* Let's snarf the universal address */
+ /* "h1.h2.h3.h4.p1.p2" */
+ tcp_uaddr = taddr2uaddr(nconf, &taddr.addr);
+ } else if (strcmp(nconf->nc_proto, NC_UDP) == 0) {
+ if (udptrans[0]) {
+ syslog(LOG_ERR,
+ "cannot have more than one UDP transport");
+ goto error;
+ }
+ udptrans = strdup(nconf->nc_netid);
+ pml->pml_map.pm_prot = IPPROTO_UDP;
+
+ /* Let's snarf the universal address */
+ /* "h1.h2.h3.h4.p1.p2" */
+ udp_uaddr = taddr2uaddr(nconf, &taddr.addr);
+ } else if (strcmp(nconf->nc_netid, "local") == 0)
+ pml->pml_map.pm_prot = IPPROTO_ST;
+ else if (strcmp(nconf->nc_netid, "unix") == 0)
+ pml->pml_map.pm_prot = IPPROTO_ST;
+ pml->pml_next = list_pml;
+ list_pml = pml;
+
+ /* Add version 3 information */
+ pml = malloc(sizeof (struct pmaplist));
+ if (pml == NULL) {
+ syslog(LOG_ERR, "no memory!");
+ exit(1);
+ }
+ pml->pml_map = list_pml->pml_map;
+ pml->pml_map.pm_vers = RPCBVERS;
+ pml->pml_next = list_pml;
+ list_pml = pml;
+
+ /* Add version 4 information */
+ pml = malloc (sizeof (struct pmaplist));
+ if (pml == NULL) {
+ syslog(LOG_ERR, "no memory!");
+ exit(1);
+ }
+ pml->pml_map = list_pml->pml_map;
+ pml->pml_map.pm_vers = RPCBVERS4;
+ pml->pml_next = list_pml;
+ list_pml = pml;
+
+ /* Also add version 2 stuff to rpcbind list */
+ rbllist_add(PMAPPROG, PMAPVERS, nconf, &taddr.addr);
+ }
+#endif
+
+ /* version 3 registration */
+ if (!svc_reg(my_xprt, RPCBPROG, RPCBVERS, rpcb_service_3, NULL)) {
+ syslog(LOG_ERR, "could not register %s version 3",
+ nconf->nc_netid);
+ goto error;
+ }
+ rbllist_add(RPCBPROG, RPCBVERS, nconf, &taddr.addr);
+
+ /* version 4 registration */
+ if (!svc_reg(my_xprt, RPCBPROG, RPCBVERS4, rpcb_service_4, NULL)) {
+ syslog(LOG_ERR, "could not register %s version 4",
+ nconf->nc_netid);
+ goto error;
+ }
+ rbllist_add(RPCBPROG, RPCBVERS4, nconf, &taddr.addr);
+
+ /* decide if bound checking works for this transport */
+ status = add_bndlist(nconf, &taddr.addr);
+#ifdef BIND_DEBUG
+ if (debugging) {
+ if (status < 0) {
+ fprintf(stderr, "Error in finding bind status for %s\n",
+ nconf->nc_netid);
+ } else if (status == 0) {
+ fprintf(stderr, "check binding for %s\n",
+ nconf->nc_netid);
+ } else if (status > 0) {
+ fprintf(stderr, "No check binding for %s\n",
+ nconf->nc_netid);
+ }
+ }
+#endif
+ /*
+ * rmtcall only supported on CLTS transports for now.
+ */
+ if (nconf->nc_semantics == NC_TPI_CLTS) {
+ status = create_rmtcall_fd(nconf);
+
+#ifdef BIND_DEBUG
+ if (debugging) {
+ if (status < 0) {
+ fprintf(stderr,
+ "Could not create rmtcall fd for %s\n",
+ nconf->nc_netid);
+ } else {
+ fprintf(stderr, "rmtcall fd for %s is %d\n",
+ nconf->nc_netid, status);
+ }
+ }
+#endif
+ }
+ return (0);
+error:
+ close(fd);
+ return (1);
+}
+
+/*
+ * Create the list of addresses that we're bound to. Normally, this
+ * list is empty because we're listening on the wildcard address
+ * (nhost == 0). If -h is specified on the command line, then
+ * bound_sa will have a list of the addresses that the program binds
+ * to specifically. This function takes that list and converts them to
+ * struct sockaddr * and stores them in bound_sa.
+ */
+static void
+update_bound_sa(void)
+{
+ struct addrinfo hints, *res = NULL;
+ int i;
+
+ if (nhosts == 0)
+ return;
+ bound_sa = malloc(sizeof(*bound_sa) * nhosts);
+ memset(&hints, 0, sizeof(hints));
+ hints.ai_family = PF_UNSPEC;
+ for (i = 0; i < nhosts; i++) {
+ if (getaddrinfo(hosts[i], NULL, &hints, &res) != 0)
+ continue;
+ bound_sa[i] = malloc(res->ai_addrlen);
+ memcpy(bound_sa[i], res->ai_addr, res->ai_addrlen);
+ }
+}
+
+/*
+ * Match the sa against the list of addresses we've bound to. If
+ * we've not specifically bound to anything, we match everything.
+ * Otherwise, if the IPv4 or IPv6 address matches one of the addresses
+ * in bound_sa, we return true. If not, we return false.
+ */
+int
+listen_addr(const struct sockaddr *sa)
+{
+ int i;
+
+ /*
+ * If nhosts == 0, then there were no -h options on the
+ * command line, so all addresses are addresses we're
+ * listening to.
+ */
+ if (nhosts == 0)
+ return 1;
+ for (i = 0; i < nhosts; i++) {
+ if (bound_sa[i] == NULL ||
+ sa->sa_family != bound_sa[i]->sa_family)
+ continue;
+ switch (sa->sa_family) {
+ case AF_INET:
+ if (memcmp(&SA2SINADDR(sa), &SA2SINADDR(bound_sa[i]),
+ sizeof(struct in_addr)) == 0)
+ return (1);
+ break;
+#ifdef INET6
+ case AF_INET6:
+ if (memcmp(&SA2SIN6ADDR(sa), &SA2SIN6ADDR(bound_sa[i]),
+ sizeof(struct in6_addr)) == 0)
+ return (1);
+ break;
+#endif
+ default:
+ break;
+ }
+ }
+ return (0);
+}
+
+static void
+rbllist_add(rpcprog_t prog, rpcvers_t vers, struct netconfig *nconf,
+ struct netbuf *addr)
+{
+ rpcblist_ptr rbl;
+
+ rbl = malloc(sizeof (rpcblist));
+ if (rbl == NULL) {
+ syslog(LOG_ERR, "no memory!");
+ exit(1);
+ }
+
+ rbl->rpcb_map.r_prog = prog;
+ rbl->rpcb_map.r_vers = vers;
+ rbl->rpcb_map.r_netid = strdup(nconf->nc_netid);
+ rbl->rpcb_map.r_addr = taddr2uaddr(nconf, addr);
+ rbl->rpcb_map.r_owner = strdup(superuser);
+ rbl->rpcb_next = list_rbl; /* Attach to global list */
+ list_rbl = rbl;
+}
+
+/*
+ * Catch the signal and die
+ */
+static void
+terminate(int dummy __unused)
+{
+ close(rpcbindlockfd);
+#ifdef WARMSTART
+ syslog(LOG_ERR,
+ "rpcbind terminating on signal. Restart with \"rpcbind -w\"");
+ write_warmstart(); /* Dump yourself */
+#endif
+ exit(2);
+}
+
+void
+rpcbind_abort(void)
+{
+#ifdef WARMSTART
+ write_warmstart(); /* Dump yourself */
+#endif
+ abort();
+}
+
+/* get command line options */
+static void
+parseargs(int argc, char *argv[])
+{
+ int c;
+
+#ifdef WARMSTART
+#define WSOP "w"
+#else
+#define WSOP ""
+#endif
+#ifdef LIBWRAP
+#define WRAPOP "W"
+#else
+#define WRAPOP ""
+#endif
+ while ((c = getopt(argc, argv, "6adh:iLls" WRAPOP WSOP)) != -1) {
+ switch (c) {
+ case '6':
+ ipv6_only = 1;
+ break;
+ case 'a':
+ doabort = 1; /* when debugging, do an abort on */
+ break; /* errors; for rpcbind developers */
+ /* only! */
+ case 'd':
+ debugging = 1;
+ break;
+ case 'h':
+ ++nhosts;
+ hosts = realloc(hosts, nhosts * sizeof(char *));
+ if (hosts == NULL)
+ errx(1, "Out of memory");
+ hosts[nhosts - 1] = strdup(optarg);
+ if (hosts[nhosts - 1] == NULL)
+ errx(1, "Out of memory");
+ break;
+ case 'i':
+ insecure = 1;
+ break;
+ case 'L':
+ oldstyle_local = 1;
+ break;
+ case 'l':
+ verboselog = 1;
+ break;
+ case 's':
+ runasdaemon = 1;
+ break;
+#ifdef LIBWRAP
+ case 'W':
+ libwrap = 1;
+ break;
+#endif
+#ifdef WARMSTART
+ case 'w':
+ warmstart = 1;
+ break;
+#endif
+ default: /* error */
+ fprintf(stderr,
+ "usage: rpcbind [-6adiLls%s%s] [-h bindip]\n",
+ WRAPOP, WSOP);
+ exit (1);
+ }
+ }
+ if (doabort && !debugging) {
+ fprintf(stderr,
+ "-a (abort) specified without -d (debugging) -- ignored.\n");
+ doabort = 0;
+ }
+#undef WSOP
+}
+
+void
+reap(int dummy __unused)
+{
+ int save_errno = errno;
+
+ while (wait3(NULL, WNOHANG, NULL) > 0)
+ ;
+ errno = save_errno;
+}
+
+void
+toggle_verboselog(int dummy __unused)
+{
+ verboselog = !verboselog;
+}
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