1 /* $NetBSD: sprayd.c,v 1.15 2009/10/21 01:07:46 snj Exp $ */ 2 3 /*- 4 * SPDX-License-Identifier: BSD-2-Clause-NetBSD 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 #ifndef lint 31 static const char rcsid[] = 32 "$FreeBSD$"; 33 #endif /* not lint */ 34 35 #include <rpc/rpc.h> 36 #include <rpcsvc/spray.h> 37 #include <signal.h> 38 #include <stdio.h> 39 #include <stdlib.h> 40 #include <sys/time.h> 41 #include <sys/socket.h> 42 #include <syslog.h> 43 #include <unistd.h> 44 45 static void spray_service(struct svc_req *, SVCXPRT *); 46 47 static int from_inetd = 1; 48 49 #define timersub(tvp, uvp, vvp) \ 50 do { \ 51 (vvp)->tv_sec = (tvp)->tv_sec - (uvp)->tv_sec; \ 52 (vvp)->tv_usec = (tvp)->tv_usec - (uvp)->tv_usec; \ 53 if ((vvp)->tv_usec < 0) { \ 54 (vvp)->tv_sec--; \ 55 (vvp)->tv_usec += 1000000; \ 56 } \ 57 } while (0) 58 59 #define TIMEOUT 120 60 61 static void 62 cleanup(int sig __unused) 63 { 64 (void)rpcb_unset(SPRAYPROG, SPRAYVERS, NULL); 65 exit(0); 66 } 67 68 static void 69 die(int sig __unused) 70 { 71 exit(0); 72 } 73 74 int 75 main(int argc __unused, char *argv[] __unused) 76 { 77 SVCXPRT *transp; 78 int ok; 79 struct sockaddr_storage from; 80 socklen_t fromlen; 81 82 /* 83 * See if inetd started us 84 */ 85 fromlen = sizeof(from); 86 if (getsockname(0, (struct sockaddr *)&from, &fromlen) < 0) { 87 from_inetd = 0; 88 } 89 90 if (!from_inetd) { 91 daemon(0, 0); 92 93 (void)rpcb_unset(SPRAYPROG, SPRAYVERS, NULL); 94 95 (void)signal(SIGINT, cleanup); 96 (void)signal(SIGTERM, cleanup); 97 (void)signal(SIGHUP, cleanup); 98 } else { 99 (void)signal(SIGALRM, die); 100 alarm(TIMEOUT); 101 } 102 103 openlog("rpc.sprayd", LOG_PID, LOG_DAEMON); 104 105 if (from_inetd) { 106 transp = svc_tli_create(0, NULL, NULL, 0, 0); 107 if (transp == NULL) { 108 syslog(LOG_ERR, "cannot create udp service."); 109 exit(1); 110 } 111 ok = svc_reg(transp, SPRAYPROG, SPRAYVERS, 112 spray_service, NULL); 113 } else 114 ok = svc_create(spray_service, 115 SPRAYPROG, SPRAYVERS, "udp"); 116 if (!ok) { 117 syslog(LOG_ERR, 118 "unable to register (SPRAYPROG, SPRAYVERS, %s)", 119 (!from_inetd)?"udp":"(inetd)"); 120 exit(1); 121 } 122 123 svc_run(); 124 syslog(LOG_ERR, "svc_run returned"); 125 return 1; 126 } 127 128 129 static void 130 spray_service(struct svc_req *rqstp, SVCXPRT *transp) 131 { 132 static spraycumul scum; 133 static struct timeval clear, get; 134 135 switch (rqstp->rq_proc) { 136 case SPRAYPROC_CLEAR: 137 scum.counter = 0; 138 (void)gettimeofday(&clear, 0); 139 /*FALLTHROUGH*/ 140 141 case NULLPROC: 142 (void)svc_sendreply(transp, (xdrproc_t)xdr_void, NULL); 143 return; 144 145 case SPRAYPROC_SPRAY: 146 scum.counter++; 147 return; 148 149 case SPRAYPROC_GET: 150 (void)gettimeofday(&get, 0); 151 timersub(&get, &clear, &get); 152 scum.clock.sec = get.tv_sec; 153 scum.clock.usec = get.tv_usec; 154 break; 155 156 default: 157 svcerr_noproc(transp); 158 return; 159 } 160 161 if (!svc_sendreply(transp, (xdrproc_t)xdr_spraycumul, &scum)) { 162 svcerr_systemerr(transp); 163 syslog(LOG_WARNING, "bad svc_sendreply"); 164 } 165 } 166