libexec/rpc.sprayd/sprayd.c

   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 }