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  * $DragonFly: src/libexec/rpc.sprayd/sprayd.c,v 1.3 2003/11/14 03:54:31 dillon Exp $
  32  */
  33
  34 #include <rpc/rpc.h>
  35 #include <rpc/pmap_clnt.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 void
  62 cleanup()
  63 {
  64         (void) pmap_unset(SPRAYPROG, SPRAYVERS);
  65         exit(0);
  66 }
  67
  68 void
  69 die()
  70 {
  71         exit(0);
  72 }
  73
  74 int
  75 main(argc, argv)
  76         int argc;
  77         char *argv[];
  78 {
  79         SVCXPRT *transp;
  80         int sock = 0;
  81         int proto = 0;
  82         struct sockaddr_in from;
  83         int 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                 sock = RPC_ANYSOCK;
  92                 proto = IPPROTO_UDP;
  93         }
  94
  95         if (!from_inetd) {
  96                 daemon(0, 0);
  97
  98                 (void) pmap_unset(SPRAYPROG, SPRAYVERS);
  99
 100                 (void) signal(SIGINT, cleanup);
 101                 (void) signal(SIGTERM, cleanup);
 102                 (void) signal(SIGHUP, cleanup);
 103         } else {
 104                 (void) signal(SIGALRM, die);
 105                 alarm(TIMEOUT);
 106         }
 107
 108         openlog("rpc.sprayd", LOG_CONS|LOG_PID, LOG_DAEMON);
 109
 110         transp = svcudp_create(sock);
 111         if (transp == NULL) {
 112                 syslog(LOG_ERR, "cannot create udp service");
 113                 return 1;
 114         }
 115         if (!svc_register(transp, SPRAYPROG, SPRAYVERS, spray_service, proto)) {
 116                 syslog(LOG_ERR,
 117                     "unable to register (SPRAYPROG, SPRAYVERS, %s)",
 118                     proto ? "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(rqstp, transp)
 130         struct svc_req *rqstp;
 131         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 }