linux-imx

/*

 *  X.25 Packet Layer release 002

 *

 *  This is ALPHA test software. This code may break your machine,

 *  randomly fail to work with new releases, misbehave and/or generally

 *  screw up. It might even work.

 *

 *  This code REQUIRES 2.1.15 or higher

 *

 *  This module:

 *      This module 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 (at your option) any later version.

 *

 *  History

 *  X.25 001    Jonathan Naylor Started coding.

 */

​

#include <linux/if_arp.h>

#include <linux/init.h>

#include <linux/slab.h>

#include <net/x25.h>

​

LIST_HEAD(x25_route_list);

DEFINE_RWLOCK(x25_route_list_lock);

​

/*

 *  Add a new route.

 */

static int x25_add_route(struct x25_address *address, unsigned int sigdigits,

             struct net_device *dev)

{

    struct x25_route *rt;

    struct list_head *entry;

    int rc = -EINVAL;

​

    write_lock_bh(&x25_route_list_lock);

​

    list_for_each(entry, &x25_route_list) {

        rt = list_entry(entry, struct x25_route, node);

​

        if (!memcmp(&rt->address, address, sigdigits) &&

            rt->sigdigits == sigdigits)

            goto out;

    }

​

    rt = kmalloc(sizeof(*rt), GFP_ATOMIC);

    rc = -ENOMEM;

    if (!rt)

        goto out;

​

    strcpy(rt->address.x25_addr, "000000000000000");

    memcpy(rt->address.x25_addr, address->x25_addr, sigdigits);

​

    rt->sigdigits = sigdigits;

    rt->dev       = dev;

    refcount_set(&rt->refcnt, 1);

​

    list_add(&rt->node, &x25_route_list);

    rc = 0;

out:

    write_unlock_bh(&x25_route_list_lock);