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