usr.sbin/mrouted/testrsrr/testrsrr.c

   1 /*
   2  * Copyright 1995 Massachusetts Institute of Technology
   3  *
   4  * Permission to use, copy, modify, and distribute this software and
   5  * its documentation for any purpose and without fee is hereby
   6  * granted, provided that both the above copyright notice and this
   7  * permission notice appear in all copies, that both the above
   8  * copyright notice and this permission notice appear in all
   9  * supporting documentation, and that the name of M.I.T. not be used
  10  * in advertising or publicity pertaining to distribution of the
  11  * software without specific, written prior permission.  M.I.T. makes
  12  * no representations about the suitability of this software for any
  13  * purpose.  It is provided "as is" without express or implied
  14  * warranty.
  15  *
  16  * THIS SOFTWARE IS PROVIDED BY M.I.T. ``AS IS''.  M.I.T. DISCLAIMS
  17  * ALL EXPRESS OR IMPLIED WARRANTIES WITH REGARD TO THIS SOFTWARE,
  18  * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  19  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT
  20  * SHALL M.I.T. BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  21  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  22  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
  23  * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
  24  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  25  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
  26  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  *
  29  * $FreeBSD: src/usr.sbin/mrouted/testrsrr/testrsrr.c,v 1.4 1999/08/28 01:17:17 peter Exp $
  30  * $DragonFly: src/usr.sbin/mrouted/testrsrr/testrsrr.c,v 1.5 2007/11/25 01:28:24 swildner Exp $
  31  */
  32 #include <stddef.h>
  33 #include <stdlib.h>
  34 #include <stdio.h>
  35 #include <string.h>
  36 #include <err.h>
  37 #include <sysexits.h>
  38
  39 #include <sys/param.h>
  40 #include <sys/types.h>
  41 #include <unistd.h>
  42 #include <sys/socket.h>
  43 #include <sys/un.h>
  44
  45 #include <netinet/in.h>
  46 #include <arpa/inet.h>
  47
  48 #include "rsrr.h"
  49
  50 char sunpath[MAXPATHLEN];
  51 int s;
  52
  53 void
  54 exitfn(void)
  55 {
  56         close(s);
  57         unlink(sunpath);
  58 }
  59
  60 int
  61 main(void)
  62 {
  63         struct sockaddr_un sun;
  64         char buf[RSRR_MAX_LEN];
  65         struct rsrr_header *rh;
  66         struct rsrr_vif *rvp;
  67         int i;
  68
  69         s = socket(PF_LOCAL, SOCK_DGRAM, 0);
  70         if (s < 0) {
  71                 err(EX_OSERR, "socket(PF_LOCAL, SOCK_DGRAM, 0)");
  72         }
  73
  74         sun.sun_family = AF_LOCAL;
  75         snprintf(sunpath, sizeof sun.sun_path, "/tmp/testrsrr.%lu",
  76                  (unsigned long)getpid());
  77         strcpy(sun.sun_path, sunpath);
  78         sun.sun_len = (offsetof(struct sockaddr_un, sun_path)
  79                        + strlen(sunpath));
  80
  81         if (bind(s, (struct sockaddr *)&sun, sun.sun_len) < 0) {
  82                 err(EX_OSERR, "bind: %s", sunpath);
  83         }
  84
  85         atexit(exitfn);         /* clean up if we exit on error */
  86
  87         strcpy(sun.sun_path, RSRR_SERV_PATH);
  88         sun.sun_len = (offsetof(struct sockaddr_un, sun_path)
  89                        + strlen(sunpath));
  90
  91         if (connect(s, (struct sockaddr *)&sun, sun.sun_len) < 0) {
  92                 err(EX_OSERR, "connect: %s", RSRR_SERV_PATH);
  93         }
  94
  95         rh = (struct rsrr_header *)buf;
  96         rh->version = RSRR_MAX_VERSION;
  97         rh->type = RSRR_INITIAL_QUERY;
  98         rh->flags = 0;
  99         rh->num = 0;
 100
 101         if (write(s, rh, sizeof *rh) == (ssize_t)-1) {
 102                 err(EX_OSERR, "write(initial query)");
 103         }
 104
 105         if (read(s, buf, sizeof buf) == (ssize_t)-1) {
 106                 err(EX_OSERR, "read(initial reply)");
 107         }
 108
 109         if (rh->version != RSRR_MAX_VERSION) {
 110                 errx(EX_PROTOCOL, "bad remote version %d", rh->version);
 111         }
 112
 113         if (rh->type != RSRR_INITIAL_REPLY) {
 114                 errx(EX_PROTOCOL, "remote returned unexpected message type %d",
 115                      rh->type);
 116         }
 117
 118         if (rh->flags) {
 119                 printf("confusing flags: %d\n", rh->flags);
 120         }
 121
 122         printf("There are %d vifs configured:\n", rh->num);
 123
 124         printf(" Vif  Thresh  Status  Local address\n");
 125         for(i = 0, rvp = (struct rsrr_vif *)(rh + 1); i < rh->num; i++,rvp++) {
 126                 printf(" %3d  %6d  %6d  %s\n", rvp->id, rvp->threshold,
 127                        rvp->status, inet_ntoa(rvp->local_addr));
 128         }
 129         exit(0);
 130 }