735 lines
18 KiB
C
735 lines
18 KiB
C
/* $NetBSD: rpcbind.c,v 1.1 2000/06/02 23:15:42 fvdl Exp $ */
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/* $FreeBSD$ */
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/*
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* Sun RPC is a product of Sun Microsystems, Inc. and is provided for
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* unrestricted use provided that this legend is included on all tape
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* media and as a part of the software program in whole or part. Users
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* may copy or modify Sun RPC without charge, but are not authorized
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* to license or distribute it to anyone else except as part of a product or
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* program developed by the user.
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*
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* SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
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* WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
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*
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* Sun RPC is provided with no support and without any obligation on the
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* part of Sun Microsystems, Inc. to assist in its use, correction,
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* modification or enhancement.
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*
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* SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
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* INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
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* OR ANY PART THEREOF.
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*
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* In no event will Sun Microsystems, Inc. be liable for any lost revenue
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* or profits or other special, indirect and consequential damages, even if
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* Sun has been advised of the possibility of such damages.
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*
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* Sun Microsystems, Inc.
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* 2550 Garcia Avenue
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* Mountain View, California 94043
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*/
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/*
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* Copyright (c) 1984 - 1991 by Sun Microsystems, Inc.
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*/
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/* #ident "@(#)rpcbind.c 1.19 94/04/25 SMI" */
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#if 0
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#ifndef lint
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static char sccsid[] = "@(#)rpcbind.c 1.35 89/04/21 Copyr 1984 Sun Micro";
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#endif
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#endif
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/*
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* rpcbind.c
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* Implements the program, version to address mapping for rpc.
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*
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*/
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <sys/errno.h>
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#include <sys/time.h>
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#include <sys/resource.h>
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#include <sys/wait.h>
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#include <sys/signal.h>
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#include <sys/socket.h>
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#include <sys/un.h>
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#include <rpc/rpc.h>
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#ifdef PORTMAP
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#include <netinet/in.h>
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#endif
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#include <arpa/inet.h>
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#include <netdb.h>
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#include <stdio.h>
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#include <netconfig.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <syslog.h>
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#include <err.h>
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#include <libutil.h>
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#include <pwd.h>
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#include <string.h>
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#include <errno.h>
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#include "rpcbind.h"
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/* Global variables */
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int debugging = 0; /* Tell me what's going on */
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int doabort = 0; /* When debugging, do an abort on errors */
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rpcblist_ptr list_rbl; /* A list of version 3/4 rpcbind services */
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/* who to suid to if -s is given */
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#define RUN_AS "daemon"
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int runasdaemon = 0;
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int insecure = 0;
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int oldstyle_local = 0;
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int verboselog = 0;
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char **hosts = NULL;
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int nhosts = 0;
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int on = 1;
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#ifdef WARMSTART
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/* Local Variable */
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static int warmstart = 0; /* Grab a old copy of registrations */
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#endif
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#ifdef PORTMAP
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struct pmaplist *list_pml; /* A list of version 2 rpcbind services */
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char *udptrans; /* Name of UDP transport */
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char *tcptrans; /* Name of TCP transport */
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char *udp_uaddr; /* Universal UDP address */
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char *tcp_uaddr; /* Universal TCP address */
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#endif
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static char servname[] = "rpcbind";
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static char superuser[] = "superuser";
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int main __P((int, char *[]));
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static int init_transport __P((struct netconfig *));
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static void rbllist_add __P((rpcprog_t, rpcvers_t, struct netconfig *,
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struct netbuf *));
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static void terminate __P((int));
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static void parseargs __P((int, char *[]));
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int
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main(int argc, char *argv[])
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{
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struct netconfig *nconf;
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void *nc_handle; /* Net config handle */
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struct rlimit rl;
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parseargs(argc, argv);
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getrlimit(RLIMIT_NOFILE, &rl);
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if (rl.rlim_cur < 128) {
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if (rl.rlim_max <= 128)
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rl.rlim_cur = rl.rlim_max;
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else
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rl.rlim_cur = 128;
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setrlimit(RLIMIT_NOFILE, &rl);
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}
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openlog("rpcbind", LOG_CONS, LOG_DAEMON);
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if (geteuid()) { /* This command allowed only to root */
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fprintf(stderr, "Sorry. You are not superuser\n");
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exit(1);
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}
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nc_handle = setnetconfig(); /* open netconfig file */
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if (nc_handle == NULL) {
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syslog(LOG_ERR, "could not read /etc/netconfig");
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exit(1);
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}
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#ifdef PORTMAP
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udptrans = "";
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tcptrans = "";
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#endif
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nconf = getnetconfigent("unix");
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if (nconf == NULL) {
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syslog(LOG_ERR, "%s: can't find local transport\n", argv[0]);
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exit(1);
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}
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init_transport(nconf);
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while ((nconf = getnetconfig(nc_handle))) {
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if (nconf->nc_flag & NC_VISIBLE)
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init_transport(nconf);
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}
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endnetconfig(nc_handle);
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/* catch the usual termination signals for graceful exit */
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(void) signal(SIGCHLD, reap);
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(void) signal(SIGINT, terminate);
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(void) signal(SIGTERM, terminate);
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(void) signal(SIGQUIT, terminate);
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/* ignore others that could get sent */
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(void) signal(SIGPIPE, SIG_IGN);
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(void) signal(SIGHUP, SIG_IGN);
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(void) signal(SIGUSR1, SIG_IGN);
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(void) signal(SIGUSR2, SIG_IGN);
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#ifdef WARMSTART
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if (warmstart) {
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read_warmstart();
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}
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#endif
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if (debugging) {
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printf("rpcbind debugging enabled.");
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if (doabort) {
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printf(" Will abort on errors!\n");
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} else {
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printf("\n");
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}
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} else {
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if (daemon(0, 0))
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err(1, "fork failed");
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}
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if (runasdaemon) {
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struct passwd *p;
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if((p = getpwnam(RUN_AS)) == NULL) {
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syslog(LOG_ERR, "cannot get uid of daemon: %m");
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exit(1);
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}
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if (setuid(p->pw_uid) == -1) {
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syslog(LOG_ERR, "setuid to daemon failed: %m");
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exit(1);
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}
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}
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network_init();
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my_svc_run();
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syslog(LOG_ERR, "svc_run returned unexpectedly");
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rpcbind_abort();
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/* NOTREACHED */
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return 0;
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}
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/*
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* Adds the entry into the rpcbind database.
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* If PORTMAP, then for UDP and TCP, it adds the entries for version 2 also
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* Returns 0 if succeeds, else fails
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*/
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static int
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init_transport(struct netconfig *nconf)
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{
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int fd;
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struct t_bind taddr;
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struct addrinfo hints, *res = NULL;
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struct __rpc_sockinfo si;
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SVCXPRT *my_xprt;
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int status; /* bound checking ? */
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int aicode;
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int addrlen;
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int nhostsbak;
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int checkbind;
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struct sockaddr *sa;
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u_int32_t host_addr[4]; /* IPv4 or IPv6 */
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struct sockaddr_un sun;
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mode_t oldmask;
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if ((nconf->nc_semantics != NC_TPI_CLTS) &&
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(nconf->nc_semantics != NC_TPI_COTS) &&
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(nconf->nc_semantics != NC_TPI_COTS_ORD))
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return (1); /* not my type */
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#ifdef ND_DEBUG
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if (debugging) {
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int i;
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char **s;
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(void) fprintf(stderr, "%s: %ld lookup routines :\n",
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nconf->nc_netid, nconf->nc_nlookups);
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for (i = 0, s = nconf->nc_lookups; i < nconf->nc_nlookups;
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i++, s++)
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fprintf(stderr, "[%d] - %s\n", i, *s);
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}
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#endif
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/*
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* XXX - using RPC library internal functions. For NC_TPI_CLTS
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* we call this later, for each socket we like to bind.
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*/
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if (nconf->nc_semantics != NC_TPI_CLTS) {
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if ((fd = __rpc_nconf2fd(nconf)) < 0) {
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syslog(LOG_ERR, "cannot create socket for %s",
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nconf->nc_netid);
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return (1);
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}
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}
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if (!__rpc_nconf2sockinfo(nconf, &si)) {
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syslog(LOG_ERR, "cannot get information for %s",
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nconf->nc_netid);
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return (1);
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}
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if (!strcmp(nconf->nc_netid, "unix")) {
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memset(&sun, 0, sizeof sun);
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sun.sun_family = AF_LOCAL;
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unlink(_PATH_RPCBINDSOCK);
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strcpy(sun.sun_path, _PATH_RPCBINDSOCK);
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sun.sun_len = SUN_LEN(&sun);
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addrlen = sizeof (struct sockaddr_un);
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sa = (struct sockaddr *)&sun;
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} else {
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/* Get rpcbind's address on this transport */
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memset(&hints, 0, sizeof hints);
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hints.ai_flags = AI_PASSIVE;
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hints.ai_family = si.si_af;
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hints.ai_socktype = si.si_socktype;
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hints.ai_protocol = si.si_proto;
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}
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if (nconf->nc_semantics == NC_TPI_CLTS) {
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/*
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* If no hosts were specified, just bind to INADDR_ANY. Otherwise
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* make sure 127.0.0.1 is added to the list.
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*/
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nhostsbak = nhosts;
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nhostsbak++;
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hosts = realloc(hosts, nhostsbak * sizeof(char *));
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if (nhostsbak == 1)
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hosts[0] = "*";
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else {
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if (hints.ai_family == AF_INET) {
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hosts[nhostsbak - 1] = "127.0.0.1";
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} else if (hints.ai_family == AF_INET6) {
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hosts[nhostsbak - 1] = "::1";
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} else
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return 1;
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}
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/*
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* Bind to specific IPs if asked to
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*/
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checkbind = 1;
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while (nhostsbak > 0) {
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--nhostsbak;
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/*
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* XXX - using RPC library internal functions.
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*/
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if ((fd = __rpc_nconf2fd(nconf)) < 0) {
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syslog(LOG_ERR, "cannot create socket for %s",
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nconf->nc_netid);
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return (1);
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}
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switch (hints.ai_family) {
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case AF_INET:
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if (inet_pton(AF_INET, hosts[nhostsbak],
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host_addr) == 1) {
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hints.ai_flags &= AI_NUMERICHOST;
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} else {
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/*
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* Skip if we have a AF_INET6 adress
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*/
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if (inet_pton(AF_INET6,
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hosts[nhostsbak], host_addr) == 1)
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continue;
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}
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break;
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case AF_INET6:
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if (inet_pton(AF_INET6, hosts[nhostsbak],
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host_addr) == 1) {
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hints.ai_flags &= AI_NUMERICHOST;
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} else {
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/*
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* Skip if we have a AF_INET adress
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*/
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if (inet_pton(AF_INET, hosts[nhostsbak],
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host_addr) == 1)
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continue;
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}
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if (setsockopt(fd, IPPROTO_IPV6,
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IPV6_V6ONLY, &on, sizeof on) < 0) {
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syslog(LOG_ERR,
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"can't set v6-only binding for "
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"udp6 socket: %m");
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continue;
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}
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break;
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default:
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break;
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}
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/*
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* If no hosts were specified, just bind to INADDR_ANY
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*/
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if (strcmp("*", hosts[nhostsbak]) == 0)
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hosts[nhostsbak] = NULL;
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if ((aicode = getaddrinfo(hosts[nhostsbak],
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servname, &hints, &res)) != 0) {
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syslog(LOG_ERR,
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"cannot get local address for %s: %s",
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nconf->nc_netid, gai_strerror(aicode));
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continue;
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}
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addrlen = res->ai_addrlen;
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sa = (struct sockaddr *)res->ai_addr;
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oldmask = umask(S_IXUSR|S_IXGRP|S_IXOTH);
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if (bind(fd, sa, addrlen) != 0) {
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syslog(LOG_ERR, "cannot bind %s on %s: %m",
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(hosts[nhostsbak] == NULL) ? "*" :
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hosts[nhostsbak], nconf->nc_netid);
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if (res != NULL)
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freeaddrinfo(res);
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continue;
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} else
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checkbind++;
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(void) umask(oldmask);
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/* Copy the address */
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taddr.addr.len = taddr.addr.maxlen = addrlen;
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taddr.addr.buf = malloc(addrlen);
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if (taddr.addr.buf == NULL) {
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syslog(LOG_ERR,
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"cannot allocate memory for %s address",
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nconf->nc_netid);
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if (res != NULL)
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freeaddrinfo(res);
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return 1;
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}
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memcpy(taddr.addr.buf, sa, addrlen);
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#ifdef ND_DEBUG
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if (debugging) {
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/*
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* for debugging print out our universal
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* address
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*/
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char *uaddr;
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struct netbuf nb;
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nb.buf = sa;
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nb.len = nb.maxlen = sa->sa_len;
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uaddr = taddr2uaddr(nconf, &nb);
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(void) fprintf(stderr,
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"rpcbind : my address is %s\n", uaddr);
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(void) free(uaddr);
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}
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#endif
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if (nconf->nc_semantics != NC_TPI_CLTS)
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listen(fd, SOMAXCONN);
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my_xprt = (SVCXPRT *)svc_tli_create(fd, nconf, &taddr,
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0, 0);
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if (my_xprt == (SVCXPRT *)NULL) {
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syslog(LOG_ERR, "%s: could not create service",
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nconf->nc_netid);
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goto error;
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}
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}
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if (!checkbind)
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return 1;
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} else {
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if (strcmp(nconf->nc_netid, "unix") != 0) {
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if ((aicode = getaddrinfo(NULL, servname, &hints, &res))
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!= 0) {
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syslog(LOG_ERR,
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"cannot get local address for %s: %s",
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nconf->nc_netid, gai_strerror(aicode));
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return 1;
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}
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addrlen = res->ai_addrlen;
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sa = (struct sockaddr *)res->ai_addr;
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}
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oldmask = umask(S_IXUSR|S_IXGRP|S_IXOTH);
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if (bind(fd, sa, addrlen) < 0) {
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syslog(LOG_ERR, "cannot bind %s: %m", nconf->nc_netid);
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if (res != NULL)
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freeaddrinfo(res);
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return 1;
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}
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(void) umask(oldmask);
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/* Copy the address */
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taddr.addr.len = taddr.addr.maxlen = addrlen;
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taddr.addr.buf = malloc(addrlen);
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if (taddr.addr.buf == NULL) {
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syslog(LOG_ERR, "cannot allocate memory for %s address",
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nconf->nc_netid);
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if (res != NULL)
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freeaddrinfo(res);
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return 1;
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}
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memcpy(taddr.addr.buf, sa, addrlen);
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#ifdef ND_DEBUG
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if (debugging) {
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/* for debugging print out our universal address */
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char *uaddr;
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struct netbuf nb;
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nb.buf = sa;
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nb.len = nb.maxlen = sa->sa_len;
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uaddr = taddr2uaddr(nconf, &nb);
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(void) fprintf(stderr, "rpcbind : my address is %s\n",
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uaddr);
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(void) free(uaddr);
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}
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#endif
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if (nconf->nc_semantics != NC_TPI_CLTS)
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listen(fd, SOMAXCONN);
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my_xprt = (SVCXPRT *)svc_tli_create(fd, nconf, &taddr, 0, 0);
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if (my_xprt == (SVCXPRT *)NULL) {
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syslog(LOG_ERR, "%s: could not create service",
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nconf->nc_netid);
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goto error;
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}
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}
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#ifdef PORTMAP
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/*
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* Register both the versions for tcp/ip, udp/ip and local.
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*/
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if ((strcmp(nconf->nc_protofmly, NC_INET) == 0 &&
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(strcmp(nconf->nc_proto, NC_TCP) == 0 ||
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strcmp(nconf->nc_proto, NC_UDP) == 0)) ||
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strcmp(nconf->nc_netid, "unix") == 0) {
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struct pmaplist *pml;
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if (!svc_register(my_xprt, PMAPPROG, PMAPVERS,
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pmap_service, NULL)) {
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syslog(LOG_ERR, "could not register on %s",
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nconf->nc_netid);
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goto error;
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}
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pml = malloc(sizeof (struct pmaplist));
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if (pml == NULL) {
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syslog(LOG_ERR, "no memory!");
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exit(1);
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}
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pml->pml_map.pm_prog = PMAPPROG;
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pml->pml_map.pm_vers = PMAPVERS;
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pml->pml_map.pm_port = PMAPPORT;
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if (strcmp(nconf->nc_proto, NC_TCP) == 0) {
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|
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 = 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);
|
|
}
|
|
|
|
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)
|
|
{
|
|
#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, "dwah:ilLs")) != -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 '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 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 __unused)
|
|
{
|
|
int save_errno = errno;
|
|
|
|
while (wait3(NULL, WNOHANG, NULL) > 0)
|
|
;
|
|
errno = save_errno;
|
|
}
|
|
|
|
void
|
|
toggle_verboselog(int dummy __unused)
|
|
{
|
|
verboselog = !verboselog;
|
|
}
|