libexec/rpc.sprayd/sprayd.c

   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 void
  60 cleanup(int sig)
  61 {
  62         (void)rpcb_unset(SPRAYPROG, SPRAYVERS, NULL);
  63         exit(0);
  64 }
  65
  66 void
  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 }