sprayd.c revision 327793 
1/*	$NetBSD: sprayd.c,v 1.14 2006/05/09 20:18:07 mrg Exp $	*/
2
3/*
4 * Copyright (c) 1994 Christos Zoulas
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 * 3. All advertising materials mentioning features or use of this software
16 *    must display the following acknowledgement:
17 *	This product includes software developed by Christos Zoulas.
18 * 4. The name of the author may not be used to endorse or promote products
19 *    derived from this software without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
22 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
23 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
24 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
26 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
27 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
28 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
29 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
30 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31 */
32
33#ifndef lint
34static const char rcsid[] =
35  "$FreeBSD: stable/10/libexec/rpc.sprayd/sprayd.c 327793 2018-01-10 21:24:03Z pfg $";
36#endif /* not lint */
37
38#include <rpc/rpc.h>
39#include <rpcsvc/spray.h>
40#include <signal.h>
41#include <stdio.h>
42#include <stdlib.h>
43#include <sys/time.h>
44#include <sys/socket.h>
45#include <syslog.h>
46#include <unistd.h>
47
48static void spray_service(struct svc_req *, SVCXPRT *);
49
50static int from_inetd = 1;
51
52#define	timersub(tvp, uvp, vvp)						\
53	do {								\
54		(vvp)->tv_sec = (tvp)->tv_sec - (uvp)->tv_sec;		\
55		(vvp)->tv_usec = (tvp)->tv_usec - (uvp)->tv_usec;	\
56		if ((vvp)->tv_usec < 0) {				\
57			(vvp)->tv_sec--;				\
58			(vvp)->tv_usec += 1000000;			\
59		}							\
60	} while (0)
61
62#define TIMEOUT 120
63
64void
65cleanup(int sig __unused)
66{
67	(void)rpcb_unset(SPRAYPROG, SPRAYVERS, NULL);
68	exit(0);
69}
70
71void
72die(int sig __unused)
73{
74	exit(0);
75}
76
77int
78main(int argc, char *argv[])
79{
80	SVCXPRT *transp;
81	int ok;
82	struct sockaddr_storage from;
83	socklen_t fromlen;
84
85	/*
86	 * See if inetd started us
87	 */
88	fromlen = sizeof(from);
89	if (getsockname(0, (struct sockaddr *)&from, &fromlen) < 0) {
90		from_inetd = 0;
91	}
92
93	if (!from_inetd) {
94		daemon(0, 0);
95
96		(void)rpcb_unset(SPRAYPROG, SPRAYVERS, NULL);
97
98		(void)signal(SIGINT, cleanup);
99		(void)signal(SIGTERM, cleanup);
100		(void)signal(SIGHUP, cleanup);
101	} else {
102		(void)signal(SIGALRM, die);
103		alarm(TIMEOUT);
104	}
105
106	openlog("rpc.sprayd", LOG_PID, LOG_DAEMON);
107
108	if (from_inetd) {
109		transp = svc_tli_create(0, NULL, NULL, 0, 0);
110		if (transp == NULL) {
111			syslog(LOG_ERR, "cannot create udp service.");
112			exit(1);
113		}
114		ok = svc_reg(transp, SPRAYPROG, SPRAYVERS,
115			     spray_service, NULL);
116	} else
117		ok = svc_create(spray_service,
118				SPRAYPROG, SPRAYVERS, "udp");
119	if (!ok) {
120		syslog(LOG_ERR,
121		    "unable to register (SPRAYPROG, SPRAYVERS, %s)",
122		    (!from_inetd)?"udp":"(inetd)");
123		exit(1);
124	}
125
126	svc_run();
127	syslog(LOG_ERR, "svc_run returned");
128	return 1;
129}
130
131
132static void
133spray_service(struct svc_req *rqstp, SVCXPRT *transp)
134{
135	static spraycumul scum;
136	static struct timeval clear, get;
137
138	switch (rqstp->rq_proc) {
139	case SPRAYPROC_CLEAR:
140		scum.counter = 0;
141		(void)gettimeofday(&clear, 0);
142		/*FALLTHROUGH*/
143
144	case NULLPROC:
145		(void)svc_sendreply(transp, (xdrproc_t)xdr_void, NULL);
146		return;
147
148	case SPRAYPROC_SPRAY:
149		scum.counter++;
150		return;
151
152	case SPRAYPROC_GET:
153		(void)gettimeofday(&get, 0);
154		timersub(&get, &clear, &get);
155		scum.clock.sec = get.tv_sec;
156		scum.clock.usec = get.tv_usec;
157		break;
158
159	default:
160		svcerr_noproc(transp);
161		return;
162	}
163
164	if (!svc_sendreply(transp, (xdrproc_t)xdr_spraycumul, &scum)) {
165		svcerr_systemerr(transp);
166		syslog(LOG_WARNING, "bad svc_sendreply");
167	}
168}
169