/*
 * show.c
 *
 * Copyright (c) 1996-1999 Whistle Communications, Inc.
 * All rights reserved.
 *
 * Subject to the following obligations and disclaimer of warranty, use and
 * redistribution of this software, in source or object code forms, with or
 * without modifications are expressly permitted by Whistle Communications;
 * provided, however, that:
 * 1. Any and all reproductions of the source or object code must include the
 *    copyright notice above and the following disclaimer of warranties; and
 * 2. No rights are granted, in any manner or form, to use Whistle
 *    Communications, Inc. trademarks, including the mark "WHISTLE
 *    COMMUNICATIONS" on advertising, endorsements, or otherwise except as
 *    such appears in the above copyright notice or in the software.
 *
 * THIS SOFTWARE IS BEING PROVIDED BY WHISTLE COMMUNICATIONS "AS IS", AND
 * TO THE MAXIMUM EXTENT PERMITTED BY LAW, WHISTLE COMMUNICATIONS MAKES NO
 * REPRESENTATIONS OR WARRANTIES, EXPRESS OR IMPLIED, REGARDING THIS SOFTWARE,
 * INCLUDING WITHOUT LIMITATION, ANY AND ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT.
 * WHISTLE COMMUNICATIONS DOES NOT WARRANT, GUARANTEE, OR MAKE ANY
 * REPRESENTATIONS REGARDING THE USE OF, OR THE RESULTS OF THE USE OF THIS
 * SOFTWARE IN TERMS OF ITS CORRECTNESS, ACCURACY, RELIABILITY OR OTHERWISE.
 * IN NO EVENT SHALL WHISTLE COMMUNICATIONS BE LIABLE FOR ANY DAMAGES
 * RESULTING FROM OR ARISING OUT OF ANY USE OF THIS SOFTWARE, INCLUDING
 * WITHOUT LIMITATION, ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
 * PUNITIVE, OR CONSEQUENTIAL DAMAGES, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES, LOSS OF USE, DATA OR PROFITS, HOWEVER CAUSED AND UNDER ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF WHISTLE COMMUNICATIONS IS ADVISED OF THE POSSIBILITY
 * OF SUCH DAMAGE.
 */

#include <err.h>
#include <netgraph.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>

#include "ngctl.h"

#define FMT             "  %-15s %-15s %-12s %-15s %-15s\n"
#define UNNAMED         "<unnamed>"
#define NOSTATUS        "<no status>"

static int ShowCmd(int ac, char **av);

const struct ngcmd show_cmd = {
        ShowCmd,
        "show [-n] <path>",
        "Show information about the node at <path>",
        "If the -n flag is given, hooks are not listed.",
        { "inquire", "info" }
};

static int
ShowCmd(int ac, char **av)
{
        char *path;
        struct ng_mesg *resp;
        struct hooklist *hlist;
        struct nodeinfo *ninfo;
        int ch, no_hooks = 0;

        /* Get options */
        optreset = 1;
        optind = 1;
        while ((ch = getopt(ac, av, "n")) != -1) {
                switch (ch) {
                case 'n':
                        no_hooks = 1;
                        break;
                default:
                        return (CMDRTN_USAGE);
                        break;
                }
        }
        ac -= optind;
        av += optind;

        /* Get arguments */
        switch (ac) {
        case 1:
                path = av[0];
                break;
        default:
                return (CMDRTN_USAGE);
        }

        /* Get node info and hook list */
        if (NgSendMsg(csock, path, NGM_GENERIC_COOKIE,
            NGM_LISTHOOKS, NULL, 0) < 0) {
                warn("send msg");
                return (CMDRTN_ERROR);
        }
        if (NgAllocRecvMsg(csock, &resp, NULL) < 0) {
                warn("recv msg");
                return (CMDRTN_ERROR);
        }

        /* Show node information */
        hlist = (struct hooklist *) resp->data;
        ninfo = &hlist->nodeinfo;
        if (!*ninfo->name)
                snprintf(ninfo->name, sizeof(ninfo->name), "%s", UNNAMED);
        printf("  Name: %-15s Type: %-15s ID: %08x   Num hooks: %d\n",
            ninfo->name, ninfo->type, ninfo->id, ninfo->hooks);
        if (!no_hooks && ninfo->hooks > 0) {
                u_int k;

                printf(FMT, "Local hook", "Peer name",
                    "Peer type", "Peer ID", "Peer hook");
                printf(FMT, "----------", "---------",
                    "---------", "-------", "---------");
                for (k = 0; k < ninfo->hooks; k++) {
                        struct linkinfo *const link = &hlist->link[k];
                        struct nodeinfo *const peer = &hlist->link[k].nodeinfo;
                        char idbuf[20];

                        if (!*peer->name) {
                                snprintf(peer->name, sizeof(peer->name),
                                  "%s", UNNAMED);
                        }
                        snprintf(idbuf, sizeof(idbuf), "%08x", peer->id);
                        printf(FMT, link->ourhook, peer->name,
                            peer->type, idbuf, link->peerhook);
                }
        }
        free(resp);
        return (CMDRTN_OK);
}