/*
 * list.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 UNNAMED         "<unnamed>"

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

const struct ngcmd list_cmd = {
        ListCmd,
        "list [-ln]",
        "Show information about all nodes",
        "The list command shows information about every node that currently"
        " exists in the netgraph system. The optional -n argument limits"
        " this list to only those nodes with a global name assignment."
        " The optional -l argument provides verbose output that includes"
        " hook information as well.",
        { "ls" }
};

static int
ListCmd(int ac, char **av)
{
        struct ng_mesg *resp;
        struct namelist *nlist;
        struct nodeinfo *ninfo;
        int list_hooks = 0;
        int named_only = 0;
        int ch, rtn = CMDRTN_OK;

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

        /* Get arguments */
        switch (ac) {
        case 0:
                break;
        default:
                return (CMDRTN_USAGE);
        }

        /* Get list of nodes */
        if (NgSendMsg(csock, ".", NGM_GENERIC_COOKIE,
            named_only ? NGM_LISTNAMES : NGM_LISTNODES, NULL, 0) < 0) {
                warn("send msg");
                return (CMDRTN_ERROR);
        }
        if (NgAllocRecvMsg(csock, &resp, NULL) < 0) {
                warn("recv msg");
                return (CMDRTN_ERROR);
        }

        /* Show each node */
        nlist = (struct namelist *) resp->data;
        printf("There are %d total %snodes:\n",
            nlist->numnames, named_only ? "named " : "");
        ninfo = nlist->nodeinfo;
        if (list_hooks) {
                char    path[NG_PATHSIZ];
                char    *argv[] = { "show", path, NULL };

                while (nlist->numnames > 0) {
                        snprintf(path, sizeof(path), "[%lx]:",
                            (unsigned long)ninfo->id);
                        if ((rtn = (*show_cmd.func)(2, argv)) != CMDRTN_OK)
                                break;
                        ninfo++;
                        nlist->numnames--;
                        if (nlist->numnames > 0)
                                printf("\n");
                }
        } else {
                while (nlist->numnames > 0) {
                        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);
                        ninfo++;
                        nlist->numnames--;
                }
        }

        /* Done */
        free(resp);
        return (rtn);
}