1/*	$NetBSD: sprayd.c,v 1.15 2009/10/21 01:07:46 snj Exp $	*/
2
3/*-
4 * SPDX-License-Identifier: BSD-2-Clause
5 *
6 * Copyright (c) 1994 Christos Zoulas
7 * All rights reserved.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 *    notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 *    notice, this list of conditions and the following disclaimer in the
16 *    documentation and/or other materials provided with the distribution.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 */
29
30#include <rpc/rpc.h>
31#include <rpcsvc/spray.h>
32#include <signal.h>
33#include <stdio.h>
34#include <stdlib.h>
35#include <sys/time.h>
36#include <sys/socket.h>
37#include <syslog.h>
38#include <unistd.h>
39
40static void spray_service(struct svc_req *, SVCXPRT *);
41
42static int from_inetd = 1;
43
44#define	timersub(tvp, uvp, vvp)						\
45	do {								\
46		(vvp)->tv_sec = (tvp)->tv_sec - (uvp)->tv_sec;		\
47		(vvp)->tv_usec = (tvp)->tv_usec - (uvp)->tv_usec;	\
48		if ((vvp)->tv_usec < 0) {				\
49			(vvp)->tv_sec--;				\
50			(vvp)->tv_usec += 1000000;			\
51		}							\
52	} while (0)
53
54#define TIMEOUT 120
55
56static void
57cleanup(int sig __unused)
58{
59	(void)rpcb_unset(SPRAYPROG, SPRAYVERS, NULL);
60	exit(0);
61}
62
63static void
64die(int sig __unused)
65{
66	exit(0);
67}
68
69int
70main(int argc __unused, char *argv[] __unused)
71{
72	SVCXPRT *transp;
73	int ok;
74	struct sockaddr_storage from;
75	socklen_t fromlen;
76
77	/*
78	 * See if inetd started us
79	 */
80	fromlen = sizeof(from);
81	if (getsockname(0, (struct sockaddr *)&from, &fromlen) < 0) {
82		from_inetd = 0;
83	}
84
85	if (!from_inetd) {
86		daemon(0, 0);
87
88		(void)rpcb_unset(SPRAYPROG, SPRAYVERS, NULL);
89
90		(void)signal(SIGINT, cleanup);
91		(void)signal(SIGTERM, cleanup);
92		(void)signal(SIGHUP, cleanup);
93	} else {
94		(void)signal(SIGALRM, die);
95		alarm(TIMEOUT);
96	}
97
98	openlog("rpc.sprayd", LOG_PID, LOG_DAEMON);
99
100	if (from_inetd) {
101		transp = svc_tli_create(0, NULL, NULL, 0, 0);
102		if (transp == NULL) {
103			syslog(LOG_ERR, "cannot create udp service.");
104			exit(1);
105		}
106		ok = svc_reg(transp, SPRAYPROG, SPRAYVERS,
107			     spray_service, NULL);
108	} else
109		ok = svc_create(spray_service,
110				SPRAYPROG, SPRAYVERS, "udp");
111	if (!ok) {
112		syslog(LOG_ERR,
113		    "unable to register (SPRAYPROG, SPRAYVERS, %s)",
114		    (!from_inetd)?"udp":"(inetd)");
115		exit(1);
116	}
117
118	svc_run();
119	syslog(LOG_ERR, "svc_run returned");
120	return 1;
121}
122
123
124static void
125spray_service(struct svc_req *rqstp, SVCXPRT *transp)
126{
127	static spraycumul scum;
128	static struct timeval clear, get;
129
130	switch (rqstp->rq_proc) {
131	case SPRAYPROC_CLEAR:
132		scum.counter = 0;
133		(void)gettimeofday(&clear, 0);
134		/*FALLTHROUGH*/
135
136	case NULLPROC:
137		(void)svc_sendreply(transp, (xdrproc_t)xdr_void, NULL);
138		return;
139
140	case SPRAYPROC_SPRAY:
141		scum.counter++;
142		return;
143
144	case SPRAYPROC_GET:
145		(void)gettimeofday(&get, 0);
146		timersub(&get, &clear, &get);
147		scum.clock.sec = get.tv_sec;
148		scum.clock.usec = get.tv_usec;
149		break;
150
151	default:
152		svcerr_noproc(transp);
153		return;
154	}
155
156	if (!svc_sendreply(transp, (xdrproc_t)xdr_spraycumul, &scum)) {
157		svcerr_systemerr(transp);
158		syslog(LOG_WARNING, "bad svc_sendreply");
159	}
160}
161