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-rw-r--r--usr.sbin/rpcbind/rpcbind.c568
1 files changed, 568 insertions, 0 deletions
diff --git a/usr.sbin/rpcbind/rpcbind.c b/usr.sbin/rpcbind/rpcbind.c
new file mode 100644
index 0000000..2ddf2c0
--- /dev/null
+++ b/usr.sbin/rpcbind/rpcbind.c
@@ -0,0 +1,568 @@
+/* $NetBSD: rpcbind.c,v 1.1 2000/06/02 23:15:42 fvdl Exp $ */
+/* $FreeBSD$ */
+
+/*
+ * Sun RPC is a product of Sun Microsystems, Inc. and is provided for
+ * unrestricted use provided that this legend is included on all tape
+ * media and as a part of the software program in whole or part. Users
+ * may copy or modify Sun RPC without charge, but are not authorized
+ * to license or distribute it to anyone else except as part of a product or
+ * program developed by the user.
+ *
+ * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
+ * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
+ *
+ * Sun RPC is provided with no support and without any obligation on the
+ * part of Sun Microsystems, Inc. to assist in its use, correction,
+ * modification or enhancement.
+ *
+ * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
+ * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
+ * OR ANY PART THEREOF.
+ *
+ * In no event will Sun Microsystems, Inc. be liable for any lost revenue
+ * or profits or other special, indirect and consequential damages, even if
+ * Sun has been advised of the possibility of such damages.
+ *
+ * Sun Microsystems, Inc.
+ * 2550 Garcia Avenue
+ * Mountain View, California 94043
+ */
+/*
+ * 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>
+#ifdef PORTMAP
+#include <netinet/in.h>
+#endif
+#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"
+
+int runasdaemon = 0;
+int insecure = 0;
+int oldstyle_local = 0;
+int verboselog = 0;
+
+#ifdef WARMSTART
+/* Local Variable */
+static int warmstart = 0; /* Grab a 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 __P((int, char *[]));
+
+static int init_transport __P((struct netconfig *));
+static void rbllist_add __P((rpcprog_t, rpcvers_t, struct netconfig *,
+ struct netbuf *));
+static void terminate __P((int));
+static void parseargs __P((int, char *[]));
+
+int
+main(int argc, char *argv[])
+{
+ struct netconfig *nconf;
+ void *nc_handle; /* Net config handle */
+ struct rlimit rl;
+
+ parseargs(argc, argv);
+
+ 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("unix");
+ if (nconf == NULL) {
+ syslog(LOG_ERR, "%s: can't find local transport\n", argv[0]);
+ exit(1);
+ }
+ init_transport(nconf);
+
+ while ((nconf = getnetconfig(nc_handle))) {
+ if (nconf->nc_flag & NC_VISIBLE)
+ 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;
+ struct sockaddr *sa;
+ 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 ((fd = __rpc_nconf2fd(nconf)) < 0) {
+ syslog(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, "unix")) {
+ 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 ((aicode = getaddrinfo(NULL, servname, &hints, &res)) != 0) {
+ syslog(LOG_ERR, "cannot get local address for %s: %s",
+ nconf->nc_netid, gai_strerror(aicode));
+ return 1;
+ }
+ 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: %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 (res != NULL)
+ freeaddrinfo(res);
+
+ if (nconf->nc_semantics != NC_TPI_CLTS)
+ listen(fd, SOMAXCONN);
+
+ my_xprt = (SVCXPRT *)svc_tli_create(fd, nconf, &taddr, 0, 0);
+ 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) {
+ struct pmaplist *pml;
+
+ if (!svc_register(my_xprt, PMAPPROG, PMAPVERS,
+ pmap_service, NULL)) {
+ syslog(LOG_ERR, "could not register on %s",
+ nconf->nc_netid);
+ goto error;
+ }
+ pml = (struct pmaplist *)malloc((u_int)sizeof (struct pmaplist));
+ if (pml == (struct pmaplist *)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, "unix") == 0)
+ pml->pml_map.pm_prot = IPPROTO_ST;
+ pml->pml_next = list_pml;
+ list_pml = pml;
+
+ /* Add version 3 information */
+ pml = (struct pmaplist *)malloc((u_int)sizeof (struct pmaplist));
+ if (pml == (struct pmaplist *)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 = (struct pmaplist *)malloc((u_int)sizeof (struct pmaplist));
+ if (pml == (struct pmaplist *)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);
+}
+
+static void
+rbllist_add(rpcprog_t prog, rpcvers_t vers, struct netconfig *nconf,
+ struct netbuf *addr)
+{
+ rpcblist_ptr rbl;
+
+ rbl = (rpcblist_ptr)malloc((u_int)sizeof (rpcblist));
+ if (rbl == (rpcblist_ptr)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)
+{
+#ifdef WARMSTART
+ syslog(LOG_ERR,
+ "rpcbind terminating on signal. Restart with \"rpcbind -w\"");
+ write_warmstart(); /* Dump yourself */
+#endif
+ exit(2);
+}
+
+void
+rpcbind_abort()
+{
+#ifdef WARMSTART
+ write_warmstart(); /* Dump yourself */
+#endif
+ abort();
+}
+
+/* get command line options */
+static void
+parseargs(int argc, char *argv[])
+{
+ int c;
+
+ while ((c = getopt(argc, argv, "dwailLs")) != -1) {
+ switch (c) {
+ case 'a':
+ doabort = 1; /* when debugging, do an abort on */
+ break; /* errors; for rpcbind developers */
+ /* only! */
+ case 'd':
+ debugging = 1;
+ break;
+ case 'i':
+ insecure = 1;
+ break;
+ case 'L':
+ oldstyle_local = 1;
+ break;
+ case 'l':
+ verboselog = 1;
+ break;
+ case 's':
+ runasdaemon = 1;
+ break;
+#ifdef WARMSTART
+ case 'w':
+ warmstart = 1;
+ break;
+#endif
+ default: /* error */
+ fprintf(stderr, "usage: rpcbind [-Idwils]\n");
+ exit (1);
+ }
+ }
+ if (doabort && !debugging) {
+ fprintf(stderr,
+ "-a (abort) specified without -d (debugging) -- ignored.\n");
+ doabort = 0;
+ }
+}
+
+void
+reap(int dummy)
+{
+ int save_errno = errno;
+
+ while (wait3(NULL, WNOHANG, NULL) > 0)
+ ;
+ errno = save_errno;
+}
+
+void
+toggle_verboselog(int dummy)
+{
+ verboselog = !verboselog;
+}
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