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sprayd.c revision 1.2 
      1 /*
      2  * Copyright (c) 1994 Christos Zoulas
      3  * All rights reserved.
      4  *
      5  * Redistribution and use in source and binary forms, with or without
      6  * modification, are permitted provided that the following conditions
      7  * are met:
      8  * 1. Redistributions of source code must retain the above copyright
      9  *    notice, this list of conditions and the following disclaimer.
     10  * 2. Redistributions in binary form must reproduce the above copyright
     11  *    notice, this list of conditions and the following disclaimer in the
     12  *    documentation and/or other materials provided with the distribution.
     13  * 3. All advertising materials mentioning features or use of this software
     14  *    must display the following acknowledgement:
     15  *	This product includes software developed by Christos Zoulas.
     16  * 4. The name of the author may not be used to endorse or promote products
     17  *    derived from this software without specific prior written permission.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     20  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     21  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     22  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     23  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     24  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     25  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     26  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     27  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     28  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     29  *
     30  *	$Id: sprayd.c,v 1.2 1994/06/24 08:17:42 deraadt Exp $
     31  */
     32 
     33 #ifndef lint
     34 static char rcsid[] = "$Id: sprayd.c,v 1.2 1994/06/24 08:17:42 deraadt Exp $";
     35 #endif /* not lint */
     36 
     37 #include <stdio.h>
     38 #include <signal.h>
     39 #include <rpc/rpc.h>
     40 #include <sys/time.h>
     41 #include <syslog.h>
     42 #include <rpcsvc/spray.h>
     43 
     44 static void spray_service __P((struct svc_req *, SVCXPRT *));
     45 
     46 static int from_inetd = 1;
     47 
     48 #define TIMEOUT 120
     49 
     50 static void
     51 cleanup()
     52 {
     53 	(void) pmap_unset(SPRAYPROG, SPRAYVERS);
     54 	exit(0);
     55 }
     56 
     57 
     58 int
     59 main(argc, argv)
     60 	int argc;
     61 	char *argv[];
     62 {
     63 	SVCXPRT *transp;
     64 	int sock = 0;
     65 	int proto = 0;
     66 	struct sockaddr_in from;
     67 	int fromlen;
     68 
     69 	/*
     70 	 * See if inetd started us
     71 	 */
     72 	if (getsockname(0, (struct sockaddr *)&from, &fromlen) < 0) {
     73 		from_inetd = 0;
     74 		sock = RPC_ANYSOCK;
     75 		proto = IPPROTO_UDP;
     76 	}
     77 
     78 	if (!from_inetd) {
     79 		daemon(0, 0);
     80 
     81 		(void) pmap_unset(SPRAYPROG, SPRAYVERS);
     82 
     83 		(void) signal(SIGINT, cleanup);
     84 		(void) signal(SIGTERM, cleanup);
     85 		(void) signal(SIGHUP, cleanup);
     86 	}
     87 
     88 	openlog("rpc.sprayd", LOG_CONS|LOG_PID, LOG_DAEMON);
     89 
     90 	transp = svcudp_create(sock);
     91 	if (transp == NULL) {
     92 		syslog(LOG_ERR, "cannot create udp service.");
     93 		return 1;
     94 	}
     95 	if (!svc_register(transp, SPRAYPROG, SPRAYVERS, spray_service, proto)) {
     96 		syslog(LOG_ERR,
     97 		    "unable to register (SPRAYPROG, SPRAYVERS, %s).",
     98 		    proto ? "udp" : "(inetd)");
     99 		return 1;
    100 	}
    101 
    102 	alarm(TIMEOUT);
    103 	svc_run();
    104 	syslog(LOG_ERR, "svc_run returned");
    105 	return 1;
    106 }
    107 
    108 
    109 static void
    110 spray_service(rqstp, transp)
    111 	struct svc_req *rqstp;
    112 	SVCXPRT *transp;
    113 {
    114 	static spraycumul scum;
    115 	static struct timeval clear;
    116 
    117 	switch (rqstp->rq_proc) {
    118 	case SPRAYPROC_CLEAR:
    119 		scum.counter = 0;
    120 		(void) gettimeofday(&clear, 0);
    121 		/*FALLTHROUGH*/
    122 
    123 	case NULLPROC:
    124 		if (!svc_sendreply(transp, xdr_void, (char *)NULL)) {
    125 			svcerr_systemerr(transp);
    126 			syslog(LOG_ERR, "bad svc_sendreply");
    127 		}
    128 		return;
    129 
    130 	case SPRAYPROC_SPRAY:
    131 		scum.counter++;
    132 		return;
    133 
    134 	case SPRAYPROC_GET:
    135 		(void) gettimeofday((struct timeval *)&scum.clock, 0);
    136 		if (scum.clock.usec < clear.tv_usec) {
    137 			scum.clock.sec--;
    138 			scum.clock.usec += 1000000;
    139 		}
    140 		scum.clock.sec -= clear.tv_sec;
    141 		scum.clock.usec -= clear.tv_usec;
    142 		break;
    143 
    144 	default:
    145 		svcerr_noproc(transp);
    146 		return;
    147 	}
    148 
    149 	if (!svc_sendreply(transp, xdr_spraycumul, (caddr_t)&scum)) {
    150 		svcerr_systemerr(transp);
    151 		syslog(LOG_ERR, "bad svc_sendreply");
    152 	}
    153 }
    154