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
31#ifndef lint
32static const char rcsid[] =
33  "$FreeBSD: releng/10.3/libexec/rpc.sprayd/sprayd.c 141918 2005-02-14 17:42:58Z stefanf $";
34#endif /* not lint */
35
36#include <rpc/rpc.h>
37#include <rpcsvc/spray.h>
38#include <signal.h>
39#include <stdio.h>
40#include <stdlib.h>
41#include <sys/time.h>
42#include <sys/socket.h>
43#include <syslog.h>
44#include <unistd.h>
45
46static void spray_service(struct svc_req *, SVCXPRT *);
47
48static int from_inetd = 1;
49
50#define	timersub(tvp, uvp, vvp)						\
51	do {								\
52		(vvp)->tv_sec = (tvp)->tv_sec - (uvp)->tv_sec;		\
53		(vvp)->tv_usec = (tvp)->tv_usec - (uvp)->tv_usec;	\
54		if ((vvp)->tv_usec < 0) {				\
55			(vvp)->tv_sec--;				\
56			(vvp)->tv_usec += 1000000;			\
57		}							\
58	} while (0)
59
60#define TIMEOUT 120
61
62void
63cleanup(int sig __unused)
64{
65	(void) rpcb_unset(SPRAYPROG, SPRAYVERS, NULL);
66	exit(0);
67}
68
69void
70die(int sig __unused)
71{
72	exit(0);
73}
74
75int
76main(int argc, char *argv[])
77{
78	SVCXPRT *transp;
79	int ok;
80	struct sockaddr_storage from;
81	socklen_t fromlen;
82
83	/*
84	 * See if inetd started us
85	 */
86	fromlen = sizeof(from);
87	if (getsockname(0, (struct sockaddr *)&from, &fromlen) < 0) {
88		from_inetd = 0;
89	}
90
91	if (!from_inetd) {
92		daemon(0, 0);
93
94		(void) rpcb_unset(SPRAYPROG, SPRAYVERS, NULL);
95
96		(void) signal(SIGINT, cleanup);
97		(void) signal(SIGTERM, cleanup);
98		(void) signal(SIGHUP, cleanup);
99	} else {
100		(void) signal(SIGALRM, die);
101		alarm(TIMEOUT);
102	}
103
104	openlog("rpc.sprayd", LOG_CONS|LOG_PID, LOG_DAEMON);
105
106	if (from_inetd) {
107		transp = svc_tli_create(0, NULL, NULL, 0, 0);
108		if (transp == NULL) {
109			syslog(LOG_ERR, "cannot create udp service.");
110			exit(1);
111		}
112		ok = svc_reg(transp, SPRAYPROG, SPRAYVERS,
113			     spray_service, NULL);
114	} else
115		ok = svc_create(spray_service,
116				SPRAYPROG, SPRAYVERS, "udp");
117	if (!ok) {
118		syslog(LOG_ERR,
119		    "unable to register (SPRAYPROG, SPRAYVERS, %s)",
120		    (!from_inetd)?"udp":"(inetd)");
121		return 1;
122	}
123
124	svc_run();
125	syslog(LOG_ERR, "svc_run returned");
126	return 1;
127}
128
129
130static void
131spray_service(struct svc_req *rqstp, SVCXPRT *transp)
132{
133	static spraycumul scum;
134	static struct timeval clear, get;
135
136	switch (rqstp->rq_proc) {
137	case SPRAYPROC_CLEAR:
138		scum.counter = 0;
139		(void) gettimeofday(&clear, 0);
140		/*FALLTHROUGH*/
141
142	case NULLPROC:
143		(void)svc_sendreply(transp, (xdrproc_t)xdr_void, NULL);
144		return;
145
146	case SPRAYPROC_SPRAY:
147		scum.counter++;
148		return;
149
150	case SPRAYPROC_GET:
151		(void) gettimeofday(&get, 0);
152		timersub(&get, &clear, &get);
153		scum.clock.sec = get.tv_sec;
154		scum.clock.usec = get.tv_usec;
155		break;
156
157	default:
158		svcerr_noproc(transp);
159		return;
160	}
161
162	if (!svc_sendreply(transp, (xdrproc_t)xdr_spraycumul, &scum)) {
163		svcerr_systemerr(transp);
164		syslog(LOG_ERR, "bad svc_sendreply");
165	}
166}
167