| 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 | * $FreeBSD: src/libexec/rpc.sprayd/sprayd.c,v 1.5 1999/08/28 00:09:59 peter Exp $ |
| 31 | */ |
| 32 | |
| 33 | #include <rpc/rpc.h> |
| 34 | #include <rpcsvc/spray.h> |
| 35 | #include <signal.h> |
| 36 | #include <stdio.h> |
| 37 | #include <stdlib.h> |
| 38 | #include <sys/time.h> |
| 39 | #include <sys/socket.h> |
| 40 | #include <syslog.h> |
| 41 | #include <unistd.h> |
| 42 | |
| 43 | static void spray_service (struct svc_req *, SVCXPRT *); |
| 44 | |
| 45 | static int from_inetd = 1; |
| 46 | |
| 47 | #define timersub(tvp, uvp, vvp) \ |
| 48 | do { \ |
| 49 | (vvp)->tv_sec = (tvp)->tv_sec - (uvp)->tv_sec; \ |
| 50 | (vvp)->tv_usec = (tvp)->tv_usec - (uvp)->tv_usec; \ |
| 51 | if ((vvp)->tv_usec < 0) { \ |
| 52 | (vvp)->tv_sec--; \ |
| 53 | (vvp)->tv_usec += 1000000; \ |
| 54 | } \ |
| 55 | } while (0) |
| 56 | |
| 57 | #define TIMEOUT 120 |
| 58 | |
| 59 | static void __dead2 |
| 60 | cleanup(int sig) |
| 61 | { |
| 62 | (void)rpcb_unset(SPRAYPROG, SPRAYVERS, NULL); |
| 63 | exit(0); |
| 64 | } |
| 65 | |
| 66 | static void __dead2 |
| 67 | die(int sig) |
| 68 | { |
| 69 | exit(0); |
| 70 | } |
| 71 | |
| 72 | int |
| 73 | main(int argc, char *argv[]) |
| 74 | { |
| 75 | SVCXPRT *transp; |
| 76 | int ok; |
| 77 | struct sockaddr_in from; |
| 78 | int fromlen; |
| 79 | |
| 80 | /* |
| 81 | * See if inetd started us |
| 82 | */ |
| 83 | fromlen = sizeof(from); |
| 84 | if (getsockname(0, (struct sockaddr *)&from, &fromlen) < 0) { |
| 85 | from_inetd = 0; |
| 86 | } |
| 87 | |
| 88 | if (!from_inetd) { |
| 89 | daemon(0, 0); |
| 90 | |
| 91 | (void) rpcb_unset(SPRAYPROG, SPRAYVERS, NULL); |
| 92 | |
| 93 | (void) signal(SIGINT, cleanup); |
| 94 | (void) signal(SIGTERM, cleanup); |
| 95 | (void) signal(SIGHUP, cleanup); |
| 96 | } else { |
| 97 | (void) signal(SIGALRM, die); |
| 98 | alarm(TIMEOUT); |
| 99 | } |
| 100 | |
| 101 | openlog("rpc.sprayd", LOG_CONS|LOG_PID, LOG_DAEMON); |
| 102 | |
| 103 | if (from_inetd) { |
| 104 | transp = svc_tli_create(0, NULL, NULL, 0, 0); |
| 105 | if (transp == NULL) { |
| 106 | syslog(LOG_ERR, "cannot create udp service."); |
| 107 | exit(1); |
| 108 | } |
| 109 | ok = svc_reg(transp, SPRAYPROG, SPRAYVERS, |
| 110 | spray_service, NULL); |
| 111 | } else |
| 112 | ok = svc_create(spray_service, |
| 113 | SPRAYPROG, SPRAYVERS, "udp"); |
| 114 | |
| 115 | if (!ok) { |
| 116 | syslog(LOG_ERR, |
| 117 | "unable to register (SPRAYPROG, SPRAYVERS, %s)", |
| 118 | (!from_inetd)?"udp":"(inetd)"); |
| 119 | return 1; |
| 120 | } |
| 121 | |
| 122 | svc_run(); |
| 123 | syslog(LOG_ERR, "svc_run returned"); |
| 124 | return 1; |
| 125 | } |
| 126 | |
| 127 | |
| 128 | static void |
| 129 | spray_service(struct svc_req *rqstp, SVCXPRT *transp) |
| 130 | { |
| 131 | static spraycumul scum; |
| 132 | static struct timeval clear, get; |
| 133 | |
| 134 | switch (rqstp->rq_proc) { |
| 135 | case SPRAYPROC_CLEAR: |
| 136 | scum.counter = 0; |
| 137 | (void) gettimeofday(&clear, 0); |
| 138 | /*FALLTHROUGH*/ |
| 139 | |
| 140 | case NULLPROC: |
| 141 | (void)svc_sendreply(transp, (xdrproc_t)xdr_void, NULL); |
| 142 | return; |
| 143 | |
| 144 | case SPRAYPROC_SPRAY: |
| 145 | scum.counter++; |
| 146 | return; |
| 147 | |
| 148 | case SPRAYPROC_GET: |
| 149 | (void) gettimeofday(&get, 0); |
| 150 | timersub(&get, &clear, &get); |
| 151 | scum.clock.sec = get.tv_sec; |
| 152 | scum.clock.usec = get.tv_usec; |
| 153 | break; |
| 154 | |
| 155 | default: |
| 156 | svcerr_noproc(transp); |
| 157 | return; |
| 158 | } |
| 159 | |
| 160 | if (!svc_sendreply(transp, (xdrproc_t)xdr_spraycumul, &scum)) { |
| 161 | svcerr_systemerr(transp); |
| 162 | syslog(LOG_ERR, "bad svc_sendreply"); |
| 163 | } |
| 164 | } |