source: bootcd/isolinux/syslinux-6.03/gpxe/src/hci/commands/ifmgmt_cmd.c

/*
 * Copyright (C) 2007 Michael Brown <mbrown@fensystems.co.uk>.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; either version 2 of the
 * License, or any later version.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

FILE_LICENCE ( GPL2_OR_LATER );

#include <stdio.h>
#include <getopt.h>
#include <gpxe/netdevice.h>
#include <gpxe/command.h>
#include <usr/ifmgmt.h>
#include <hci/ifmgmt_cmd.h>

/** @file
 *
 * Network interface management commands
 *
 */

/** Options shared by all if<xxx> commands */
static struct option ifcommon_longopts[] = {
        { "help", 0, NULL, 'h' },
        { NULL, 0, NULL, 0 },
};

/**
 * Print syntax of if<xxx> command
 *
 * @v argv              Command arguments
 * @v verb              Verb describing the action of the command
 */
static void ifcommon_syntax ( char **argv, const char *verb ) {
        printf ( "Usage:\n"
                 "  %s [<interface>] [<interface>...]\n"
                 "\n"
                 "%s the specified network interfaces\n",
                 argv[0], verb );
}

/**
 * Execute if<xxx> command over all network devices
 *
 * @v payload           Command to execute
 * @ret rc              Exit code
 */
static int ifcommon_do_all ( int ( * payload ) ( struct net_device * ) ) {
        struct net_device *netdev;
        int rc = 0;

        /* Execute payload for each network device */
        for_each_netdev ( netdev ) {
                if ( payload ( netdev ) != 0 )
                        rc = 1;
        }
        return rc;
}

/**
 * Execute if<xxx> command over list of network devices
 *
 * @v payload           Command to execute
 * @ret rc              Exit code
 */
static int ifcommon_do_list ( int ( * payload ) ( struct net_device * ),
                              char **list, unsigned int count ) {
        const char *netdev_name;
        struct net_device *netdev;
        int rc = 0;

        while ( count-- ) {
                netdev_name = *(list++);
                netdev = find_netdev ( netdev_name );
                if ( ! netdev ) {
                        printf ( "%s: no such interface\n", netdev_name );
                        rc = 1;
                        continue;
                }
                if ( payload ( netdev ) != 0 )
                        rc = 1;
        }
        return rc;
}

/**
 * Execute if<xxx> command
 *
 * @v argc              Argument count
 * @v argv              Argument list
 * @v payload           Command to execute
 * @v verb              Verb describing the action of the command
 * @ret rc              Exit code
 */
int ifcommon_exec ( int argc, char **argv,
                    int ( * payload ) ( struct net_device * ),
                    const char *verb ) {
        int c;

        /* Parse options */
        while ( ( c = getopt_long ( argc, argv, "h", ifcommon_longopts,
                                    NULL ) ) >= 0 ) {
                switch ( c ) {
                case 'h':
                        /* Display help text */
                default:
                        /* Unrecognised/invalid option */
                        ifcommon_syntax ( argv, verb );
                        return 1;
                }
        }

        if ( optind == argc ) {
                return ifcommon_do_all ( payload );
        } else {
                return ifcommon_do_list ( payload, &argv[optind],
                                          ( argc - optind ) );
        }
}

/* "ifopen" command */

static int ifopen_payload ( struct net_device *netdev ) {
        return ifopen ( netdev );
}

static int ifopen_exec ( int argc, char **argv ) {
        return ifcommon_exec ( argc, argv, ifopen_payload, "Open" );
}

/* "ifclose" command */

static int ifclose_payload ( struct net_device *netdev ) {
        ifclose ( netdev );
        return 0;
}

static int ifclose_exec ( int argc, char **argv ) {
        return ifcommon_exec ( argc, argv, ifclose_payload, "Close" );
}

/* "ifstat" command */

static int ifstat_payload ( struct net_device *netdev ) {
        ifstat ( netdev );
        return 0;
}

static int ifstat_exec ( int argc, char **argv ) {
        return ifcommon_exec ( argc, argv,
                               ifstat_payload, "Display status of" );
}

/** Interface management commands */
struct command ifmgmt_commands[] __command = {
        {
                .name = "ifopen",
                .exec = ifopen_exec,
        },
        {
                .name = "ifclose",
                .exec = ifclose_exec,
        },
        {
                .name = "ifstat",
                .exec = ifstat_exec,
        },
};