[apple/network_cmds.git] / ypserv.tproj / ypserv.c

/*
 * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
 *
 * @APPLE_LICENSE_HEADER_START@
 * 
 * "Portions Copyright (c) 1999 Apple Computer, Inc.  All Rights
 * Reserved.  This file contains Original Code and/or Modifications of
 * Original Code as defined in and that are subject to the Apple Public
 * Source License Version 1.0 (the 'License').  You may not use this file
 * except in compliance with the License.  Please obtain a copy of the
 * License at http://www.apple.com/publicsource and read it before using
 * this file.
 * 
 * The Original Code and all software distributed under the License are
 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
 * License for the specific language governing rights and limitations
 * under the License."
 * 
 * @APPLE_LICENSE_HEADER_END@
 */
/*	$OpenBSD: ypserv.c,v 1.12 1997/11/04 07:40:52 deraadt Exp $ */

/*
 * Copyright (c) 1994 Mats O Jansson <moj@stacken.kth.se>
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. 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.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by Mats O Jansson
 * 4. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
 */

#ifndef LINT
static char rcsid[] = "$OpenBSD: ypserv.c,v 1.12 1997/11/04 07:40:52 deraadt Exp $";
#endif

#include "yp.h"
#include "ypv1.h"
#include <stdio.h>
#include <stdlib.h>/* getenv, exit */
#include <rpc/pmap_clnt.h> /* for pmap_unset */
#include <string.h> /* strcmp */
#include <unistd.h>
#include <netdb.h>
#include <signal.h>
#include <errno.h>
#include <sys/ttycom.h>/* TIOCNOTTY */
#ifdef __cplusplus
#include <sysent.h> /* getdtablesize, open */
#endif /* __cplusplus */
#include <memory.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <syslog.h>
#include "acl.h"
#include "yplog.h"
#include "ypdef.h"
#include <sys/wait.h>
#include <sys/ioctl.h> /* for ioctl */
#include <sys/fcntl.h> /* for open */

#ifdef __STDC__
#define SIG_PF void(*)(int)
#endif

#ifdef DEBUG
#define RPC_SVC_FG
#endif

#define _RPCSVC_CLOSEDOWN 120
static int _rpcpmstart;		/* Started by a port monitor ? */
static int _rpcfdtype;		/* Whether Stream or Datagram ? */
static int _rpcsvcdirty;	/* Still serving ? */

int	usedns = FALSE;
char   *progname = "ypserv";
char   *aclfile = NULL;

void sig_child();
void sig_hup();

/* in the RPC library */
SVCXPRT *svcfd_create(int, u_int, u_int);

static
void _msgout(char* msg)
{
#ifdef RPC_SVC_FG
	if (_rpcpmstart)
		syslog(LOG_ERR, msg);
	else
		(void) fprintf(stderr, "%s\n", msg);
#else
	syslog(LOG_ERR, msg);
#endif
}

static void
closedown()
{
	if (_rpcsvcdirty == 0) {
		extern fd_set svc_fdset;
		static int size;
		int i, openfd;

		if (_rpcfdtype == SOCK_DGRAM)
			exit(0);
		if (size == 0) {
			size = getdtablesize();
		}
		for (i = 0, openfd = 0; i < size && openfd < 2; i++)
			if (FD_ISSET(i, &svc_fdset))
				openfd++;
		if (openfd <= (_rpcpmstart?0:1))
			exit(0);
	}
	(void) alarm(_RPCSVC_CLOSEDOWN);
}

static void
ypprog_1(struct svc_req *rqstp, register SVCXPRT *transp)
{
	union {
		domainname ypproc_domain_1_arg;
		domainname ypproc_domain_nonack_1_arg;
		yprequest ypproc_match_1_arg;
		yprequest ypproc_first_1_arg;
		yprequest ypproc_next_1_arg;
		yprequest ypproc_poll_1_arg;
		yprequest ypproc_push_1_arg;
		yprequest ypproc_pull_1_arg;
		yprequest ypproc_get_1_arg;
	} argument;
	char *result;
	xdrproc_t xdr_argument, xdr_result;
	char *(*local)(char *, struct svc_req *);

	_rpcsvcdirty = 1;
	switch (rqstp->rq_proc) {
	case YPOLDPROC_NULL:
		xdr_argument = (xdrproc_t) xdr_void;
		xdr_result = (xdrproc_t) xdr_void;
		local = (char *(*)(char *, struct svc_req *)) ypproc_null_1_svc;
		break;

	case YPOLDPROC_DOMAIN:
		xdr_argument = (xdrproc_t) xdr_domainname;
		xdr_result = (xdrproc_t) xdr_bool;
		local = (char *(*)(char *, struct svc_req *)) ypproc_domain_1_svc;
		break;

	case YPOLDPROC_DOMAIN_NONACK:
		xdr_argument = (xdrproc_t) xdr_domainname;
		xdr_result = (xdrproc_t) xdr_bool;
		local = (char *(*)(char *, struct svc_req *)) ypproc_domain_nonack_1_svc;
		break;

	case YPOLDPROC_MATCH:
		xdr_argument = (xdrproc_t) xdr_yprequest;
		xdr_result = (xdrproc_t) xdr_ypresponse;
		local = (char *(*)(char *, struct svc_req *)) ypproc_match_1_svc;
		break;

	case YPOLDPROC_FIRST:
		xdr_argument = (xdrproc_t) xdr_yprequest;
		xdr_result = (xdrproc_t) xdr_ypresponse;
		local = (char *(*)(char *, struct svc_req *)) ypproc_first_1_svc;
		break;

	case YPOLDPROC_NEXT:
		xdr_argument = (xdrproc_t) xdr_yprequest;
		xdr_result = (xdrproc_t) xdr_ypresponse;
		local = (char *(*)(char *, struct svc_req *)) ypproc_next_1_svc;
		break;

	case YPOLDPROC_POLL:
		xdr_argument = (xdrproc_t) xdr_yprequest;
		xdr_result = (xdrproc_t) xdr_ypresponse;
		local = (char *(*)(char *, struct svc_req *)) ypproc_poll_1_svc;
		break;

	case YPOLDPROC_PUSH:
		xdr_argument = (xdrproc_t) xdr_yprequest;
		xdr_result = (xdrproc_t) xdr_void;
		local = (char *(*)(char *, struct svc_req *)) ypproc_push_1_svc;
		break;

	case YPOLDPROC_PULL:
		xdr_argument = (xdrproc_t) xdr_yprequest;
		xdr_result = (xdrproc_t) xdr_void;
		local = (char *(*)(char *, struct svc_req *)) ypproc_pull_1_svc;
		break;

	case YPOLDPROC_GET:
		xdr_argument = (xdrproc_t) xdr_yprequest;
		xdr_result = (xdrproc_t) xdr_void;
		local = (char *(*)(char *, struct svc_req *)) ypproc_get_1_svc;
		break;

	default:
		svcerr_noproc(transp);
		_rpcsvcdirty = 0;
		return;
	}
	(void) memset((char *)&argument, 0, sizeof (argument));
	if (!svc_getargs(transp, xdr_argument, (caddr_t) &argument)) {
		svcerr_decode(transp);
		_rpcsvcdirty = 0;
		return;
	}
	result = (*local)((char *)&argument, rqstp);
	if (result != NULL && !svc_sendreply(transp, xdr_result, result)) {
		svcerr_systemerr(transp);
	}
	if (!svc_freeargs(transp, xdr_argument, (caddr_t) &argument)) {
		_msgout("unable to free arguments");
		exit(1);
	}
	_rpcsvcdirty = 0;
	return;
}

static void
ypprog_2(struct svc_req *rqstp, register SVCXPRT *transp)
{
	union {
		domainname ypproc_domain_2_arg;
		domainname ypproc_domain_nonack_2_arg;
		ypreq_key ypproc_match_2_arg;
		ypreq_nokey ypproc_first_2_arg;
		ypreq_key ypproc_next_2_arg;
		ypreq_xfr ypproc_xfr_2_arg;
		ypreq_nokey ypproc_all_2_arg;
		ypreq_nokey ypproc_master_2_arg;
		ypreq_nokey ypproc_order_2_arg;
		domainname ypproc_maplist_2_arg;
	} argument;
	char *result;
	xdrproc_t xdr_argument, xdr_result;
	char *(*local)(char *, struct svc_req *);

	_rpcsvcdirty = 1;
	switch (rqstp->rq_proc) {
	case YPPROC_NULL:
		xdr_argument = (xdrproc_t) xdr_void;
		xdr_result = (xdrproc_t) xdr_void;
		local = (char *(*)(char *, struct svc_req *)) ypproc_null_2_svc;
		break;

	case YPPROC_DOMAIN:
		xdr_argument = (xdrproc_t) xdr_domainname;
		xdr_result = (xdrproc_t) xdr_bool;
		local = (char *(*)(char *, struct svc_req *)) ypproc_domain_2_svc;
		break;

	case YPPROC_DOMAIN_NONACK:
		xdr_argument = (xdrproc_t) xdr_domainname;
		xdr_result = (xdrproc_t) xdr_bool;
		local = (char *(*)(char *, struct svc_req *)) ypproc_domain_nonack_2_svc;
		break;

	case YPPROC_MATCH:
		xdr_argument = (xdrproc_t) xdr_ypreq_key;
		xdr_result = (xdrproc_t) xdr_ypresp_val;
		local = (char *(*)(char *, struct svc_req *)) ypproc_match_2_svc;
		break;

	case YPPROC_FIRST:
		xdr_argument = (xdrproc_t) xdr_ypreq_nokey;
		xdr_result = (xdrproc_t) xdr_ypresp_key_val;
		local = (char *(*)(char *, struct svc_req *)) ypproc_first_2_svc;
		break;

	case YPPROC_NEXT:
		xdr_argument = (xdrproc_t) xdr_ypreq_key;
		xdr_result = (xdrproc_t) xdr_ypresp_key_val;
		local = (char *(*)(char *, struct svc_req *)) ypproc_next_2_svc;
		break;

	case YPPROC_XFR:
		xdr_argument = (xdrproc_t) xdr_ypreq_xfr;
		xdr_result = (xdrproc_t) xdr_ypresp_xfr;
		local = (char *(*)(char *, struct svc_req *)) ypproc_xfr_2_svc;
		break;

	case YPPROC_CLEAR:
		xdr_argument = (xdrproc_t) xdr_void;
		xdr_result = (xdrproc_t) xdr_void;
		local = (char *(*)(char *, struct svc_req *)) ypproc_clear_2_svc;
		break;

	case YPPROC_ALL:
		xdr_argument = (xdrproc_t) xdr_ypreq_nokey;
		xdr_result = (xdrproc_t) xdr_ypresp_all;
		local = (char *(*)(char *, struct svc_req *)) ypproc_all_2_svc;
		break;

	case YPPROC_MASTER:
		xdr_argument = (xdrproc_t) xdr_ypreq_nokey;
		xdr_result = (xdrproc_t) xdr_ypresp_master;
		local = (char *(*)(char *, struct svc_req *)) ypproc_master_2_svc;
		break;

	case YPPROC_ORDER:
		xdr_argument = (xdrproc_t) xdr_ypreq_nokey;
		xdr_result = (xdrproc_t) xdr_ypresp_order;
		local = (char *(*)(char *, struct svc_req *)) ypproc_order_2_svc;
		break;

	case YPPROC_MAPLIST:
		xdr_argument = (xdrproc_t) xdr_domainname;
		xdr_result = (xdrproc_t) xdr_ypresp_maplist;
		local = (char *(*)(char *, struct svc_req *)) ypproc_maplist_2_svc;
		break;

	default:
		svcerr_noproc(transp);
		_rpcsvcdirty = 0;
		return;
	}
	(void) memset((char *)&argument, 0, sizeof (argument));
	if (!svc_getargs(transp, xdr_argument, (caddr_t) &argument)) {
		svcerr_decode(transp);
		_rpcsvcdirty = 0;
		return;
	}
	result = (*local)((char *)&argument, rqstp);
	if (result != NULL && !svc_sendreply(transp, xdr_result, result)) {
		svcerr_systemerr(transp);
	}
	if (!svc_freeargs(transp, xdr_argument, (caddr_t) &argument)) {
		_msgout("unable to free arguments");
		exit(1);
	}
	_rpcsvcdirty = 0;
	return;
}

int
main (argc,argv)
int argc;
char *argv[];
{
	register SVCXPRT *transp = NULL;
	int sock;
	int proto = 0;
	struct sockaddr_in saddr;
	int asize = sizeof (saddr);
	int	 usage = 0;
	int	 xflag = 0;
	int	 allowv1 = 0;
	int	 ch;
	extern	 char *optarg;
	
	while ((ch = getopt(argc, argv, "1a:dx")) != -1)
		switch (ch) {
		case '1':
			allowv1 = TRUE;
			break;
		case 'a':
			aclfile = optarg;
			break;
		case 'd':
			usedns = TRUE;
			break;
		case 'x':
			xflag = TRUE;
			break;
		default:
			usage++;
			break;
		}
	
	if (usage) {
		(void)fprintf(stderr,"usage: %s [-a aclfile] [-d] [-x]\n",progname);
		exit(1);
	}

	if (geteuid() != 0) {
		(void)fprintf(stderr,"%s: must be root to run.\n",progname);
		exit(1);
	}

	if (aclfile != NULL) {
		(void)yp_acl_init(aclfile);
	} else {
		(void)yp_acl_securenet(YP_SECURENET_FILE);
	}
	if (xflag) {
		exit(1);
	};

	if (getsockname(0, (struct sockaddr *)&saddr, &asize) == 0) {
		int ssize = sizeof (int);

		if (saddr.sin_family != AF_INET)
			exit(1);
		if (getsockopt(0, SOL_SOCKET, SO_TYPE,
				(char *)&_rpcfdtype, &ssize) == -1)
			exit(1);
		sock = 0;
		_rpcpmstart = 1;
		proto = 0;
		openlog("ypserv", LOG_PID, LOG_DAEMON);
	} else {
#ifndef RPC_SVC_FG
		int size;
		int pid, i;

		pid = fork();
		if (pid < 0) {
			perror("cannot fork");
			exit(1);
		}
		if (pid)
			exit(0);
		size = getdtablesize();
		for (i = 0; i < size; i++)
			(void) close(i);
		i = open("/dev/console", 2);
		(void) dup2(i, 1);
		(void) dup2(i, 2);
		i = open("/dev/tty", 2);
		if (i >= 0) {
			(void) ioctl(i, TIOCNOTTY, (char *)NULL);
			(void) close(i);
		}
		openlog("ypserv", LOG_PID, LOG_DAEMON);
#endif
		sock = RPC_ANYSOCK;
		(void) pmap_unset(YPPROG, YPVERS);
		(void) pmap_unset(YPPROG, YPOLDVERS);
	}

	ypopenlog();	/* open log file */
	ypdb_init();	/* init db stuff */

	chdir("/");
	
	(void)signal(SIGCHLD, sig_child);
	(void)signal(SIGHUP, sig_hup);
	{ FILE *pidfile = fopen(YPSERV_PID_PATH, "w");
	  if (pidfile != NULL) {
		fprintf(pidfile, "%d\n", getpid());
		fclose(pidfile);
	  }
	}

	if ((_rpcfdtype == 0) || (_rpcfdtype == SOCK_DGRAM)) {
		transp = svcudp_create(sock);
		if (transp == NULL) {
			_msgout("cannot create udp service.");
			exit(1);
		}
		if (transp->xp_port >= IPPORT_RESERVED) {
			_msgout("cannot allocate udp privileged port.");
			exit(1);
		}
		if (!_rpcpmstart)
			proto = IPPROTO_UDP;
		if (allowv1) {
			if (!svc_register(transp, YPPROG, YPOLDVERS, ypprog_1, proto)) {
				_msgout("unable to register (YPPROG, YPOLDVERS, udp).");
				exit(1);
			}
		}
		if (!svc_register(transp, YPPROG, YPVERS, ypprog_2, proto)) {
			_msgout("unable to register (YPPROG, YPVERS, udp).");
			exit(1);
		}
	}

	if ((_rpcfdtype == 0) || (_rpcfdtype == SOCK_STREAM)) {
		if (_rpcpmstart)
			transp = svcfd_create(sock, 0, 0);
		else
			transp = svctcp_create(sock, 0, 0);
		if (transp == NULL) {
			_msgout("cannot create tcp service.");
			exit(1);
		}
		if (transp->xp_port >= IPPORT_RESERVED) {
			_msgout("cannot allocate tcp privileged port.");
			exit(1);
		}
		if (!_rpcpmstart)
			proto = IPPROTO_TCP;
		if (allowv1) {
			if (!svc_register(transp, YPPROG, YPOLDVERS, ypprog_1, proto)) {
				_msgout("unable to register (YPPROG, YPOLDVERS, tcp).");
				exit(1);
			}
		}
		if (!svc_register(transp, YPPROG, YPVERS, ypprog_2, proto)) {
			_msgout("unable to register (YPPROG, YPVERS, tcp).");
			exit(1);
		}
	}

	if (transp == (SVCXPRT *)NULL) {
		_msgout("could not create a handle");
		exit(1);
	}
	if (_rpcpmstart) {
		(void) signal(SIGALRM, (SIG_PF) closedown);
		(void) alarm(_RPCSVC_CLOSEDOWN);
	}
	svc_run();
	_msgout("svc_run returned");
	exit(1);
	/* NOTREACHED */
}

void
sig_child()
{
	int save_errno = errno;

	while (wait3((int *)NULL, WNOHANG, (struct rusage *)NULL) > 0)
		;
	errno = save_errno;
}

void
sig_hup()
{
	yp_acl_reset();
	if (aclfile != NULL) {
		yplog("sig_hup: reread %s",aclfile);
		(void)yp_acl_init(aclfile);
	} else {
		yplog("sig_hup: reread %s",YP_SECURENET_FILE);
		(void)yp_acl_securenet(YP_SECURENET_FILE);
	}
}
Commit	Line	Data
b7080c8e A	1	/*
	2	* Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
	3	*
	4	* @APPLE_LICENSE_HEADER_START@
	5	*
2b484d24 A	6	* "Portions Copyright (c) 1999 Apple Computer, Inc. All Rights
	7	* Reserved. This file contains Original Code and/or Modifications of
	8	* Original Code as defined in and that are subject to the Apple Public
	9	* Source License Version 1.0 (the 'License'). You may not use this file
	10	* except in compliance with the License. Please obtain a copy of the
	11	* License at http://www.apple.com/publicsource and read it before using
	12	* this file.
b7080c8e A	13	*
	14	* The Original Code and all software distributed under the License are
	15	* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
	16	* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
	17	* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
2b484d24 A	18	* FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
	19	* License for the specific language governing rights and limitations
	20	* under the License."
b7080c8e A	21	*
	22	* @APPLE_LICENSE_HEADER_END@
	23	*/
	24	/* $OpenBSD: ypserv.c,v 1.12 1997/11/04 07:40:52 deraadt Exp $ */
	25
	26	/*
	27	* Copyright (c) 1994 Mats O Jansson <moj@stacken.kth.se>
	28	* All rights reserved.
	29	*
	30	* Redistribution and use in source and binary forms, with or without
	31	* modification, are permitted provided that the following conditions
	32	* are met:
	33	* 1. Redistributions of source code must retain the above copyright
	34	* notice, this list of conditions and the following disclaimer.
	35	* 2. Redistributions in binary form must reproduce the above copyright
	36	* notice, this list of conditions and the following disclaimer in the
	37	* documentation and/or other materials provided with the distribution.
	38	* 3. All advertising materials mentioning features or use of this software
	39	* must display the following acknowledgement:
	40	* This product includes software developed by Mats O Jansson
	41	* 4. The name of the author may not be used to endorse or promote products
	42	* derived from this software without specific prior written permission.
	43	*
	44	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
	45	* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
	46	* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	47	* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
	48	* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	49	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	50	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	51	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	52	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	53	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	54	* SUCH DAMAGE.
	55	*/
	56
	57	#ifndef LINT
	58	static char rcsid[] = "$OpenBSD: ypserv.c,v 1.12 1997/11/04 07:40:52 deraadt Exp $";
	59	#endif
	60
	61	#include "yp.h"
	62	#include "ypv1.h"
	63	#include <stdio.h>
	64	#include <stdlib.h>/* getenv, exit */
	65	#include <rpc/pmap_clnt.h> /* for pmap_unset */
	66	#include <string.h> /* strcmp */
	67	#include <unistd.h>
	68	#include <netdb.h>
	69	#include <signal.h>
	70	#include <errno.h>
	71	#include <sys/ttycom.h>/* TIOCNOTTY */
	72	#ifdef __cplusplus
	73	#include <sysent.h> /* getdtablesize, open */
	74	#endif /* __cplusplus */
	75	#include <memory.h>
	76	#include <sys/socket.h>
	77	#include <netinet/in.h>
	78	#include <syslog.h>
	79	#include "acl.h"
	80	#include "yplog.h"
	81	#include "ypdef.h"
	82	#include <sys/wait.h>
	83	#include <sys/ioctl.h> /* for ioctl */
	84	#include <sys/fcntl.h> /* for open */
85
86	#ifdef __STDC__
87	#define SIG_PF void(*)(int)
88	#endif
89
90	#ifdef DEBUG
91	#define RPC_SVC_FG
92	#endif
93
94	#define _RPCSVC_CLOSEDOWN 120
95	static int _rpcpmstart; /* Started by a port monitor ? */
96	static int _rpcfdtype; /* Whether Stream or Datagram ? */
97	static int _rpcsvcdirty; /* Still serving ? */
98
99	int usedns = FALSE;
100	char *progname = "ypserv";
101	char *aclfile = NULL;
102
103	void sig_child();
104	void sig_hup();
105
106	/* in the RPC library */
107	SVCXPRT *svcfd_create(int, u_int, u_int);
108
109	static
110	void _msgout(char* msg)
111	{
112	#ifdef RPC_SVC_FG
113	if (_rpcpmstart)
114	syslog(LOG_ERR, msg);
115	else
116	(void) fprintf(stderr, "%s\n", msg);
117	#else
118	syslog(LOG_ERR, msg);
119	#endif
120	}
121
122	static void
123	closedown()
124	{
125	if (_rpcsvcdirty == 0) {
126	extern fd_set svc_fdset;
127	static int size;
128	int i, openfd;
129
130	if (_rpcfdtype == SOCK_DGRAM)
131	exit(0);
132	if (size == 0) {
133	size = getdtablesize();
134	}
135	for (i = 0, openfd = 0; i < size && openfd < 2; i++)
136	if (FD_ISSET(i, &svc_fdset))
137	openfd++;
138	if (openfd <= (_rpcpmstart?0:1))
139	exit(0);
140	}
141	(void) alarm(_RPCSVC_CLOSEDOWN);
142	}
143
144	static void
145	ypprog_1(struct svc_req rqstp, register SVCXPRT transp)
146	{
147	union {
148	domainname ypproc_domain_1_arg;
149	domainname ypproc_domain_nonack_1_arg;
150	yprequest ypproc_match_1_arg;
151	yprequest ypproc_first_1_arg;
152	yprequest ypproc_next_1_arg;
153	yprequest ypproc_poll_1_arg;
154	yprequest ypproc_push_1_arg;
155	yprequest ypproc_pull_1_arg;
156	yprequest ypproc_get_1_arg;
157	} argument;
158	char *result;
159	xdrproc_t xdr_argument, xdr_result;
160	char (local)(char , struct svc_req );
161
162	_rpcsvcdirty = 1;
163	switch (rqstp->rq_proc) {
164	case YPOLDPROC_NULL:
165	xdr_argument = (xdrproc_t) xdr_void;
166	xdr_result = (xdrproc_t) xdr_void;
167	local = (char ()(char , struct svc_req )) ypproc_null_1_svc;
168	break;
169
170	case YPOLDPROC_DOMAIN:
171	xdr_argument = (xdrproc_t) xdr_domainname;
172	xdr_result = (xdrproc_t) xdr_bool;
173	local = (char ()(char , struct svc_req )) ypproc_domain_1_svc;
174	break;
175
176	case YPOLDPROC_DOMAIN_NONACK:
177	xdr_argument = (xdrproc_t) xdr_domainname;
178	xdr_result = (xdrproc_t) xdr_bool;
179	local = (char ()(char , struct svc_req )) ypproc_domain_nonack_1_svc;
180	break;
181
182	case YPOLDPROC_MATCH:
183	xdr_argument = (xdrproc_t) xdr_yprequest;
184	xdr_result = (xdrproc_t) xdr_ypresponse;
185	local = (char ()(char , struct svc_req )) ypproc_match_1_svc;
186	break;
187
188	case YPOLDPROC_FIRST:
189	xdr_argument = (xdrproc_t) xdr_yprequest;
190	xdr_result = (xdrproc_t) xdr_ypresponse;
191	local = (char ()(char , struct svc_req )) ypproc_first_1_svc;
192	break;
193
194	case YPOLDPROC_NEXT:
195	xdr_argument = (xdrproc_t) xdr_yprequest;
196	xdr_result = (xdrproc_t) xdr_ypresponse;
197	local = (char ()(char , struct svc_req )) ypproc_next_1_svc;
198	break;
199
200	case YPOLDPROC_POLL:
201	xdr_argument = (xdrproc_t) xdr_yprequest;
202	xdr_result = (xdrproc_t) xdr_ypresponse;
203	local = (char ()(char , struct svc_req )) ypproc_poll_1_svc;
204	break;
205
206	case YPOLDPROC_PUSH:
207	xdr_argument = (xdrproc_t) xdr_yprequest;
208	xdr_result = (xdrproc_t) xdr_void;
209	local = (char ()(char , struct svc_req )) ypproc_push_1_svc;
210	break;
211
212	case YPOLDPROC_PULL:
213	xdr_argument = (xdrproc_t) xdr_yprequest;
214	xdr_result = (xdrproc_t) xdr_void;
215	local = (char ()(char , struct svc_req )) ypproc_pull_1_svc;
216	break;
217
218	case YPOLDPROC_GET:
219	xdr_argument = (xdrproc_t) xdr_yprequest;
220	xdr_result = (xdrproc_t) xdr_void;
221	local = (char ()(char , struct svc_req )) ypproc_get_1_svc;
222	break;
223
224	default:
225	svcerr_noproc(transp);
226	_rpcsvcdirty = 0;
227	return;
228	}
229	(void) memset((char *)&argument, 0, sizeof (argument));
230	if (!svc_getargs(transp, xdr_argument, (caddr_t) &argument)) {
231	svcerr_decode(transp);
232	_rpcsvcdirty = 0;
233	return;
234	}
235	result = (local)((char )&argument, rqstp);
236	if (result != NULL && !svc_sendreply(transp, xdr_result, result)) {
237	svcerr_systemerr(transp);
238	}
239	if (!svc_freeargs(transp, xdr_argument, (caddr_t) &argument)) {
240	_msgout("unable to free arguments");
241	exit(1);
242	}
243	_rpcsvcdirty = 0;
244	return;
245	}
246
247	static void
248	ypprog_2(struct svc_req rqstp, register SVCXPRT transp)
249	{
250	union {
251	domainname ypproc_domain_2_arg;
252	domainname ypproc_domain_nonack_2_arg;
253	ypreq_key ypproc_match_2_arg;
254	ypreq_nokey ypproc_first_2_arg;
255	ypreq_key ypproc_next_2_arg;
256	ypreq_xfr ypproc_xfr_2_arg;
257	ypreq_nokey ypproc_all_2_arg;
258	ypreq_nokey ypproc_master_2_arg;
259	ypreq_nokey ypproc_order_2_arg;
260	domainname ypproc_maplist_2_arg;
261	} argument;
262	char *result;
263	xdrproc_t xdr_argument, xdr_result;
264	char (local)(char , struct svc_req );
265
266	_rpcsvcdirty = 1;
267	switch (rqstp->rq_proc) {
268	case YPPROC_NULL:
269	xdr_argument = (xdrproc_t) xdr_void;
270	xdr_result = (xdrproc_t) xdr_void;
271	local = (char ()(char , struct svc_req )) ypproc_null_2_svc;
272	break;
273
274	case YPPROC_DOMAIN:
275	xdr_argument = (xdrproc_t) xdr_domainname;
276	xdr_result = (xdrproc_t) xdr_bool;
277	local = (char ()(char , struct svc_req )) ypproc_domain_2_svc;
278	break;
279
280	case YPPROC_DOMAIN_NONACK:
281	xdr_argument = (xdrproc_t) xdr_domainname;
282	xdr_result = (xdrproc_t) xdr_bool;
283	local = (char ()(char , struct svc_req )) ypproc_domain_nonack_2_svc;
284	break;
285
286	case YPPROC_MATCH:
287	xdr_argument = (xdrproc_t) xdr_ypreq_key;
288	xdr_result = (xdrproc_t) xdr_ypresp_val;
289	local = (char ()(char , struct svc_req )) ypproc_match_2_svc;
290	break;
291
292	case YPPROC_FIRST:
293	xdr_argument = (xdrproc_t) xdr_ypreq_nokey;
294	xdr_result = (xdrproc_t) xdr_ypresp_key_val;
295	local = (char ()(char , struct svc_req )) ypproc_first_2_svc;
296	break;
297
298	case YPPROC_NEXT:
299	xdr_argument = (xdrproc_t) xdr_ypreq_key;
300	xdr_result = (xdrproc_t) xdr_ypresp_key_val;
301	local = (char ()(char , struct svc_req )) ypproc_next_2_svc;
302	break;
303
304	case YPPROC_XFR:
305	xdr_argument = (xdrproc_t) xdr_ypreq_xfr;
306	xdr_result = (xdrproc_t) xdr_ypresp_xfr;
307	local = (char ()(char , struct svc_req )) ypproc_xfr_2_svc;
308	break;
309
310	case YPPROC_CLEAR:
311	xdr_argument = (xdrproc_t) xdr_void;
312	xdr_result = (xdrproc_t) xdr_void;
313	local = (char ()(char , struct svc_req )) ypproc_clear_2_svc;
314	break;
315
316	case YPPROC_ALL:
317	xdr_argument = (xdrproc_t) xdr_ypreq_nokey;
318	xdr_result = (xdrproc_t) xdr_ypresp_all;
319	local = (char ()(char , struct svc_req )) ypproc_all_2_svc;
320	break;
321
322	case YPPROC_MASTER:
323	xdr_argument = (xdrproc_t) xdr_ypreq_nokey;
324	xdr_result = (xdrproc_t) xdr_ypresp_master;
325	local = (char ()(char , struct svc_req )) ypproc_master_2_svc;
326	break;
327
328	case YPPROC_ORDER:
329	xdr_argument = (xdrproc_t) xdr_ypreq_nokey;
330	xdr_result = (xdrproc_t) xdr_ypresp_order;
331	local = (char ()(char , struct svc_req )) ypproc_order_2_svc;
332	break;
333
334	case YPPROC_MAPLIST:
335	xdr_argument = (xdrproc_t) xdr_domainname;
336	xdr_result = (xdrproc_t) xdr_ypresp_maplist;
337	local = (char ()(char , struct svc_req )) ypproc_maplist_2_svc;
338	break;
339
340	default:
341	svcerr_noproc(transp);
342	_rpcsvcdirty = 0;
343	return;
344	}
345	(void) memset((char *)&argument, 0, sizeof (argument));
346	if (!svc_getargs(transp, xdr_argument, (caddr_t) &argument)) {
347	svcerr_decode(transp);
348	_rpcsvcdirty = 0;
349	return;
350	}
351	result = (local)((char )&argument, rqstp);
352	if (result != NULL && !svc_sendreply(transp, xdr_result, result)) {
353	svcerr_systemerr(transp);
354	}
355	if (!svc_freeargs(transp, xdr_argument, (caddr_t) &argument)) {
356	_msgout("unable to free arguments");
357	exit(1);
358	}
359	_rpcsvcdirty = 0;
360	return;
361	}
362
363	int
364	main (argc,argv)
365	int argc;
366	char *argv[];
367	{
368	register SVCXPRT *transp = NULL;
369	int sock;
370	int proto = 0;
371	struct sockaddr_in saddr;
372	int asize = sizeof (saddr);
373	int usage = 0;
374	int xflag = 0;
375	int allowv1 = 0;
376	int ch;
377	extern char *optarg;
378
379	while ((ch = getopt(argc, argv, "1a:dx")) != -1)
380	switch (ch) {
381	case '1':
382	allowv1 = TRUE;
383	break;
384	case 'a':
385	aclfile = optarg;
386	break;
387	case 'd':
388	usedns = TRUE;
389	break;
390	case 'x':
391	xflag = TRUE;
392	break;
393	default:
394	usage++;
395	break;
396	}
397
398	if (usage) {
399	(void)fprintf(stderr,"usage: %s [-a aclfile] [-d] [-x]\n",progname);
400	exit(1);
401	}
402
403	if (geteuid() != 0) {
404	(void)fprintf(stderr,"%s: must be root to run.\n",progname);
405	exit(1);
406	}
407
408	if (aclfile != NULL) {
2b484d24	409	(void)yp_acl_init(aclfile);
b7080c8e	410	} else {
2b484d24	411	(void)yp_acl_securenet(YP_SECURENET_FILE);
b7080c8e A	412	}
	413	if (xflag) {
	414	exit(1);
	415	};
	416
	417	if (getsockname(0, (struct sockaddr *)&saddr, &asize) == 0) {
	418	int ssize = sizeof (int);
	419
	420	if (saddr.sin_family != AF_INET)
	421	exit(1);
	422	if (getsockopt(0, SOL_SOCKET, SO_TYPE,
	423	(char *)&_rpcfdtype, &ssize) == -1)
	424	exit(1);
	425	sock = 0;
	426	_rpcpmstart = 1;
	427	proto = 0;
	428	openlog("ypserv", LOG_PID, LOG_DAEMON);
	429	} else {
	430	#ifndef RPC_SVC_FG
	431	int size;
	432	int pid, i;
	433
	434	pid = fork();
	435	if (pid < 0) {
	436	perror("cannot fork");
	437	exit(1);
	438	}
	439	if (pid)
	440	exit(0);
	441	size = getdtablesize();
	442	for (i = 0; i < size; i++)
	443	(void) close(i);
	444	i = open("/dev/console", 2);
	445	(void) dup2(i, 1);
	446	(void) dup2(i, 2);
	447	i = open("/dev/tty", 2);
	448	if (i >= 0) {
	449	(void) ioctl(i, TIOCNOTTY, (char *)NULL);
	450	(void) close(i);
	451	}
	452	openlog("ypserv", LOG_PID, LOG_DAEMON);
	453	#endif
	454	sock = RPC_ANYSOCK;
	455	(void) pmap_unset(YPPROG, YPVERS);
	456	(void) pmap_unset(YPPROG, YPOLDVERS);
	457	}
	458
	459	ypopenlog(); /* open log file */
	460	ypdb_init(); /* init db stuff */
	461
	462	chdir("/");
	463
	464	(void)signal(SIGCHLD, sig_child);
	465	(void)signal(SIGHUP, sig_hup);
	466	{ FILE *pidfile = fopen(YPSERV_PID_PATH, "w");
	467	if (pidfile != NULL) {
	468	fprintf(pidfile, "%d\n", getpid());
	469	fclose(pidfile);
	470	}
	471	}
	472
	473	if ((_rpcfdtype == 0) \|\| (_rpcfdtype == SOCK_DGRAM)) {
	474	transp = svcudp_create(sock);
	475	if (transp == NULL) {
476	_msgout("cannot create udp service.");
477	exit(1);
478	}
479	if (transp->xp_port >= IPPORT_RESERVED) {
480	_msgout("cannot allocate udp privileged port.");
481	exit(1);
482	}
483	if (!_rpcpmstart)
484	proto = IPPROTO_UDP;
485	if (allowv1) {
486	if (!svc_register(transp, YPPROG, YPOLDVERS, ypprog_1, proto)) {
487	_msgout("unable to register (YPPROG, YPOLDVERS, udp).");
488	exit(1);
489	}
490	}
491	if (!svc_register(transp, YPPROG, YPVERS, ypprog_2, proto)) {
492	_msgout("unable to register (YPPROG, YPVERS, udp).");
493	exit(1);
494	}
495	}
496
497	if ((_rpcfdtype == 0) \|\| (_rpcfdtype == SOCK_STREAM)) {
498	if (_rpcpmstart)
499	transp = svcfd_create(sock, 0, 0);
500	else
501	transp = svctcp_create(sock, 0, 0);
502	if (transp == NULL) {
503	_msgout("cannot create tcp service.");
504	exit(1);
505	}
506	if (transp->xp_port >= IPPORT_RESERVED) {
507	_msgout("cannot allocate tcp privileged port.");
508	exit(1);
509	}
510	if (!_rpcpmstart)
511	proto = IPPROTO_TCP;
512	if (allowv1) {
513	if (!svc_register(transp, YPPROG, YPOLDVERS, ypprog_1, proto)) {
514	_msgout("unable to register (YPPROG, YPOLDVERS, tcp).");
515	exit(1);
516	}
517	}
518	if (!svc_register(transp, YPPROG, YPVERS, ypprog_2, proto)) {
519	_msgout("unable to register (YPPROG, YPVERS, tcp).");
520	exit(1);
521	}
522	}
523
524	if (transp == (SVCXPRT *)NULL) {
525	_msgout("could not create a handle");
526	exit(1);
527	}
528	if (_rpcpmstart) {
529	(void) signal(SIGALRM, (SIG_PF) closedown);
530	(void) alarm(_RPCSVC_CLOSEDOWN);
531	}
532	svc_run();
533	_msgout("svc_run returned");
534	exit(1);
535	/* NOTREACHED */
536	}
537
538	void
539	sig_child()
540	{
541	int save_errno = errno;
542
543	while (wait3((int )NULL, WNOHANG, (struct rusage )NULL) > 0)
544	;
545	errno = save_errno;
546	}
547
548	void
549	sig_hup()
550	{
2b484d24	551	yp_acl_reset();
b7080c8e A	552	if (aclfile != NULL) {
b7080c8e A	553	yplog("sig_hup: reread %s",aclfile);
2b484d24	554	(void)yp_acl_init(aclfile);
b7080c8e A	555	} else {
b7080c8e A	556	yplog("sig_hup: reread %s",YP_SECURENET_FILE);
2b484d24	557	(void)yp_acl_securenet(YP_SECURENET_FILE);
b7080c8e A	558	}
b7080c8e A	559	}