HELP!! int to byte array!

by Rodrigo Platero » Fri, 20 May 2011 09:30:36 GMT


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 Hi!

I need help! I need convert an int to a byte array, and i don't get it!!

Thanks!!

PD: Sorry my english :S
Rodrigo Platero Montero

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Re: HELP!! int to byte array!

by Miguel Morales » Fri, 20 May 2011 09:41:31 GMT


  http://stackoverflow.com/questions/1936857/convert-integer-into-byte-array-java 

On Thu, May 19, 2011 at 2:25 AM, Rodrigo Platero







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2. struct ip6_tnl_net? register_netdev(ip6n->fb_tnl_dev) failed?

Hi,

I need to port some code from linux kernel 2.6.18 to kernel 2.6.29.
One of the file where changes are involved is <net/ipv6/ip6_tunnel.c>,
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only 111111 to 44444 were displayed, which indicates that
"register_netdev(ip6n->fb_tnl_dev)" failed.

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====================Kernel 2.6.18 code, works fine====================
static int __init ip6_tunnel_init(void)
{
        int  err;
    struct  ip6_tnl *tun0;

        if (xfrm6_tunnel_register(&ip6ip6_handler)) {
                printk(KERN_ERR "ip6ip6 init: can't register tunnel\n");
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                                         ip6ip6_tnl_dev_setup);

        if (!ip6ip6_fb_tnl_dev) {
                err = -ENOMEM;
                goto fail;
        }
        ip6ip6_fb_tnl_dev->init = ip6ip6_fb_tnl_dev_init;

        if ((err = register_netdev(ip6ip6_fb_tnl_dev))) {
                free_netdev(ip6ip6_fb_tnl_dev);
                goto fail;
        }
    tun0 = ip6ip6_fb_tnl_dev->priv;
    tun0->parms.flags |= (IP6_TNL_F_CAP_XMIT | IP6_TNL_F_CAP_RCV);
        return 0;
fail:
        xfrm6_tunnel_deregister(&ip6ip6_handler);
        return err;
}


=================modified Kernel 2.6.29 code, buggy==============
static int __init ip6_tunnel_init(void)
{
        int err;
        struct ip6_tnl_net *ip6n; /*added due to kernel struct change*/
        struct ip6_tnl *tun0;   /*added 06082010*/


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        }

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                err = -EAGAIN;
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        err = register_pernet_gen_device(&ip6_tnl_net_id, &ip6_tnl_net_ops);
        if (err < 0)
                goto err_pernet;
        printk(KERN_ERR "=========1111111111111111111========\n");

        //alloc_netdev() and init the device, added
        err = -ENOMEM;
        ip6n = kzalloc(sizeof(struct ip6_tnl_net), GFP_KERNEL);
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                goto out;

        ip6n->fb_tnl_dev = alloc_netdev(sizeof(struct ip6_tnl), "ip6tnl0",
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                err = -ENOMEM;
                goto out;
        }
printk(KERN_ERR "=========3333333333333333333========\n");


        ip6n->fb_tnl_dev->init = ip6_fb_tnl_dev_init2;
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printk(KERN_ERR "=========4444444444444444444========\n");

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        if (err<0) {
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        }
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//      tun0 = ip6ip6_fb_tnl_dev->priv;         /*added per patch*/
        tun0 = netdev_priv(ip6n->fb_tnl_dev);   /*modified  */
printk(KERN_ERR "=========666666666666666666========\n");
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printk(KERN_ERR "========err unreg_ip4ip6=========\n");
out:
printk(KERN_ERR "========err out==================\n");
        return err;
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