libexec/rpc.sprayd/sprayd.c

   1 /*      $NetBSD: sprayd.c,v 1.14 2006/05/09 20:18:07 mrg Exp $  */
   2
   3 /*
   4  * Copyright (c) 1994 Christos Zoulas
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  * 3. All advertising materials mentioning features or use of this software
  16  *    must display the following acknowledgement:
  17  *      This product includes software developed by Christos Zoulas.
  18  * 4. The name of the author may not be used to endorse or promote products
  19  *    derived from this software without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  22  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  23  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  24  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  25  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  26  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  27  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  28  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  29  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  30  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  31  */
  32
  33 #ifndef lint
  34 static const char rcsid[] =
  35   "$FreeBSD$";
  36 #endif /* not lint */
  37
  38 #include <rpc/rpc.h>
  39 #include <rpcsvc/spray.h>
  40 #include <signal.h>
  41 #include <stdio.h>
  42 #include <stdlib.h>
  43 #include <sys/time.h>
  44 #include <sys/socket.h>
  45 #include <syslog.h>
  46 #include <unistd.h>
  47
  48 static void spray_service(struct svc_req *, SVCXPRT *);
  49
  50 static int from_inetd = 1;
  51
  52 #define timersub(tvp, uvp, vvp)                                         \
  53         do {                                                            \
  54                 (vvp)->tv_sec = (tvp)->tv_sec - (uvp)->tv_sec;          \
  55                 (vvp)->tv_usec = (tvp)->tv_usec - (uvp)->tv_usec;       \
  56                 if ((vvp)->tv_usec < 0) {                               \
  57                         (vvp)->tv_sec--;                                \
  58                         (vvp)->tv_usec += 1000000;                      \
  59                 }                                                       \
  60         } while (0)
  61
  62 #define TIMEOUT 120
  63
  64 void
  65 cleanup(int sig __unused)
  66 {
  67         (void)rpcb_unset(SPRAYPROG, SPRAYVERS, NULL);
  68         exit(0);
  69 }
  70
  71 void
  72 die(int sig __unused)
  73 {
  74         exit(0);
  75 }
  76
  77 int
  78 main(int argc, char *argv[])
  79 {
  80         SVCXPRT *transp;
  81         int ok;
  82         struct sockaddr_storage from;
  83         socklen_t fromlen;
  84
  85         /*
  86          * See if inetd started us
  87          */
  88         fromlen = sizeof(from);
  89         if (getsockname(0, (struct sockaddr *)&from, &fromlen) < 0) {
  90                 from_inetd = 0;
  91         }
  92
  93         if (!from_inetd) {
  94                 daemon(0, 0);
  95
  96                 (void)rpcb_unset(SPRAYPROG, SPRAYVERS, NULL);
  97
  98                 (void)signal(SIGINT, cleanup);
  99                 (void)signal(SIGTERM, cleanup);
 100                 (void)signal(SIGHUP, cleanup);
 101         } else {
 102                 (void)signal(SIGALRM, die);
 103                 alarm(TIMEOUT);
 104         }
 105
 106         openlog("rpc.sprayd", LOG_PID, LOG_DAEMON);
 107
 108         if (from_inetd) {
 109                 transp = svc_tli_create(0, NULL, NULL, 0, 0);
 110                 if (transp == NULL) {
 111                         syslog(LOG_ERR, "cannot create udp service.");
 112                         exit(1);
 113                 }
 114                 ok = svc_reg(transp, SPRAYPROG, SPRAYVERS,
 115                              spray_service, NULL);
 116         } else
 117                 ok = svc_create(spray_service,
 118                                 SPRAYPROG, SPRAYVERS, "udp");
 119         if (!ok) {
 120                 syslog(LOG_ERR,
 121                     "unable to register (SPRAYPROG, SPRAYVERS, %s)",
 122                     (!from_inetd)?"udp":"(inetd)");
 123                 exit(1);
 124         }
 125
 126         svc_run();
 127         syslog(LOG_ERR, "svc_run returned");
 128         return 1;
 129 }
 130
 131
 132 static void
 133 spray_service(struct svc_req *rqstp, SVCXPRT *transp)
 134 {
 135         static spraycumul scum;
 136         static struct timeval clear, get;
 137
 138         switch (rqstp->rq_proc) {
 139         case SPRAYPROC_CLEAR:
 140                 scum.counter = 0;
 141                 (void)gettimeofday(&clear, 0);
 142                 /*FALLTHROUGH*/
 143
 144         case NULLPROC:
 145                 (void)svc_sendreply(transp, (xdrproc_t)xdr_void, NULL);
 146                 return;
 147
 148         case SPRAYPROC_SPRAY:
 149                 scum.counter++;
 150                 return;
 151
 152         case SPRAYPROC_GET:
 153                 (void)gettimeofday(&get, 0);
 154                 timersub(&get, &clear, &get);
 155                 scum.clock.sec = get.tv_sec;
 156                 scum.clock.usec = get.tv_usec;
 157                 break;
 158
 159         default:
 160                 svcerr_noproc(transp);
 161                 return;
 162         }
 163
 164         if (!svc_sendreply(transp, (xdrproc_t)xdr_spraycumul, &scum)) {
 165                 svcerr_systemerr(transp);
 166                 syslog(LOG_WARNING, "bad svc_sendreply");
 167         }
 168 }