usr.sbin/ngctl/show.c

   1
   2 /*
   3  * show.c
   4  *
   5  * Copyright (c) 1996-1999 Whistle Communications, Inc.
   6  * All rights reserved.
   7  *
   8  * Subject to the following obligations and disclaimer of warranty, use and
   9  * redistribution of this software, in source or object code forms, with or
  10  * without modifications are expressly permitted by Whistle Communications;
  11  * provided, however, that:
  12  * 1. Any and all reproductions of the source or object code must include the
  13  *    copyright notice above and the following disclaimer of warranties; and
  14  * 2. No rights are granted, in any manner or form, to use Whistle
  15  *    Communications, Inc. trademarks, including the mark "WHISTLE
  16  *    COMMUNICATIONS" on advertising, endorsements, or otherwise except as
  17  *    such appears in the above copyright notice or in the software.
  18  *
  19  * THIS SOFTWARE IS BEING PROVIDED BY WHISTLE COMMUNICATIONS "AS IS", AND
  20  * TO THE MAXIMUM EXTENT PERMITTED BY LAW, WHISTLE COMMUNICATIONS MAKES NO
  21  * REPRESENTATIONS OR WARRANTIES, EXPRESS OR IMPLIED, REGARDING THIS SOFTWARE,
  22  * INCLUDING WITHOUT LIMITATION, ANY AND ALL IMPLIED WARRANTIES OF
  23  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT.
  24  * WHISTLE COMMUNICATIONS DOES NOT WARRANT, GUARANTEE, OR MAKE ANY
  25  * REPRESENTATIONS REGARDING THE USE OF, OR THE RESULTS OF THE USE OF THIS
  26  * SOFTWARE IN TERMS OF ITS CORRECTNESS, ACCURACY, RELIABILITY OR OTHERWISE.
  27  * IN NO EVENT SHALL WHISTLE COMMUNICATIONS BE LIABLE FOR ANY DAMAGES
  28  * RESULTING FROM OR ARISING OUT OF ANY USE OF THIS SOFTWARE, INCLUDING
  29  * WITHOUT LIMITATION, ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
  30  * PUNITIVE, OR CONSEQUENTIAL DAMAGES, PROCUREMENT OF SUBSTITUTE GOODS OR
  31  * SERVICES, LOSS OF USE, DATA OR PROFITS, HOWEVER CAUSED AND UNDER ANY
  32  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  33  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  34  * THIS SOFTWARE, EVEN IF WHISTLE COMMUNICATIONS IS ADVISED OF THE POSSIBILITY
  35  * OF SUCH DAMAGE.
  36  */
  37
  38 #include <err.h>
  39 #include <netgraph.h>
  40 #include <stdio.h>
  41 #include <stdlib.h>
  42 #include <unistd.h>
  43
  44 #include "ngctl.h"
  45
  46 #define FMT             "  %-15s %-15s %-12s %-15s %-15s\n"
  47 #define UNNAMED         "<unnamed>"
  48 #define NOSTATUS        "<no status>"
  49
  50 static int ShowCmd(int ac, char **av);
  51
  52 const struct ngcmd show_cmd = {
  53         ShowCmd,
  54         "show [-n] <path>",
  55         "Show information about the node at <path>",
  56         "If the -n flag is given, hooks are not listed.",
  57         { "inquire", "info" }
  58 };
  59
  60 static int
  61 ShowCmd(int ac, char **av)
  62 {
  63         char *path;
  64         struct ng_mesg *resp;
  65         struct hooklist *hlist;
  66         struct nodeinfo *ninfo;
  67         int ch, no_hooks = 0;
  68
  69         /* Get options */
  70         optind = 1;
  71         while ((ch = getopt(ac, av, "n")) != -1) {
  72                 switch (ch) {
  73                 case 'n':
  74                         no_hooks = 1;
  75                         break;
  76                 case '?':
  77                 default:
  78                         return (CMDRTN_USAGE);
  79                         break;
  80                 }
  81         }
  82         ac -= optind;
  83         av += optind;
  84
  85         /* Get arguments */
  86         switch (ac) {
  87         case 1:
  88                 path = av[0];
  89                 break;
  90         default:
  91                 return (CMDRTN_USAGE);
  92         }
  93
  94         /* Get node info and hook list */
  95         if (NgSendMsg(csock, path, NGM_GENERIC_COOKIE,
  96             NGM_LISTHOOKS, NULL, 0) < 0) {
  97                 warn("send msg");
  98                 return (CMDRTN_ERROR);
  99         }
 100         if (NgAllocRecvMsg(csock, &resp, NULL) < 0) {
 101                 warn("recv msg");
 102                 return (CMDRTN_ERROR);
 103         }
 104
 105         /* Show node information */
 106         hlist = (struct hooklist *) resp->data;
 107         ninfo = &hlist->nodeinfo;
 108         if (!*ninfo->name)
 109                 snprintf(ninfo->name, sizeof(ninfo->name), "%s", UNNAMED);
 110         printf("  Name: %-15s Type: %-15s ID: %08x   Num hooks: %d\n",
 111             ninfo->name, ninfo->type, ninfo->id, ninfo->hooks);
 112         if (!no_hooks && ninfo->hooks > 0) {
 113                 u_int k;
 114
 115                 printf(FMT, "Local hook", "Peer name",
 116                     "Peer type", "Peer ID", "Peer hook");
 117                 printf(FMT, "----------", "---------",
 118                     "---------", "-------", "---------");
 119                 for (k = 0; k < ninfo->hooks; k++) {
 120                         struct linkinfo *const link = &hlist->link[k];
 121                         struct nodeinfo *const peer = &hlist->link[k].nodeinfo;
 122                         char idbuf[20];
 123
 124                         if (!*peer->name) {
 125                                 snprintf(peer->name, sizeof(peer->name),
 126                                   "%s", UNNAMED);
 127                         }
 128                         snprintf(idbuf, sizeof(idbuf), "%08x", peer->id);
 129                         printf(FMT, link->ourhook, peer->name,
 130                             peer->type, idbuf, link->peerhook);
 131                 }
 132         }
 133         free(resp);
 134         return (CMDRTN_OK);
 135 }
 136
 137