Subversion Repositories or1k_soc_on_altera_embedded_dev_kit

/*

 * Copyright (C) 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)

 * Licensed under the GPL.

 */

#include <linux/if_arp.h>

#include "linux/init.h"

#include <linux/netdevice.h>

#include <linux/string.h>

#include "net_kern.h"

#include "net_user.h"

#include "slirp.h"

struct slirp_init {

        struct arg_list_dummy_wrapper argw;  /* XXX should be simpler... */

};

void slirp_init(struct net_device *dev, void *data)

{

        struct uml_net_private *private;

        struct slirp_data *spri;

        struct slirp_init *init = data;

        int i;

        private = dev->priv;

        spri = (struct slirp_data *) private->user;

        spri->argw = init->argw;

        spri->pid = -1;

        spri->slave = -1;

        spri->dev = dev;

        slip_proto_init(&spri->slip);

        dev->init = NULL;

        dev->hard_header_len = 0;

        dev->header_ops = NULL;

        dev->addr_len = 0;

        dev->type = ARPHRD_SLIP;

        dev->tx_queue_len = 256;

        dev->flags = IFF_NOARP;

        printk("SLIRP backend - command line:");

        for (i = 0; spri->argw.argv[i] != NULL; i++)

                printk(" '%s'",spri->argw.argv[i]);

        printk("\n");

}

static unsigned short slirp_protocol(struct sk_buff *skbuff)

{

        return htons(ETH_P_IP);

}

static int slirp_read(int fd, struct sk_buff *skb, struct uml_net_private *lp)

{

        return slirp_user_read(fd, skb_mac_header(skb), skb->dev->mtu,

                               (struct slirp_data *) &lp->user);

}

static int slirp_write(int fd, struct sk_buff *skb, struct uml_net_private *lp)

{

        return slirp_user_write(fd, skb->data, skb->len,

                                (struct slirp_data *) &lp->user);

}

const struct net_kern_info slirp_kern_info = {

        .init                   = slirp_init,

        .protocol               = slirp_protocol,

        .read                   = slirp_read,

        .write                  = slirp_write,

};

static int slirp_setup(char *str, char **mac_out, void *data)

{

        struct slirp_init *init = data;

        int i=0;

        *init = ((struct slirp_init) { .argw = { { "slirp", NULL  } } });

        str = split_if_spec(str, mac_out, NULL);

        if (str == NULL) /* no command line given after MAC addr */

                return 1;

        do {

                if (i >= SLIRP_MAX_ARGS - 1) {

                        printk(KERN_WARNING "slirp_setup: truncating slirp "

                               "arguments\n");

                        break;

                }

                init->argw.argv[i++] = str;

                while(*str && *str!=',') {

                        if (*str == '_')

                                *str=' ';

                        str++;

                }

                if (*str != ',')

                        break;

                *str++ = '\0';

        } while (1);

        init->argw.argv[i] = NULL;

        return 1;

}

static struct transport slirp_transport = {

        .list           = LIST_HEAD_INIT(slirp_transport.list),

        .name           = "slirp",

        .setup          = slirp_setup,

        .user           = &slirp_user_info,

        .kern           = &slirp_kern_info,

        .private_size   = sizeof(struct slirp_data),

        .setup_size     = sizeof(struct slirp_init),

};

static int register_slirp(void)

{

        register_transport(&slirp_transport);

        return 0;

}

late_initcall(register_slirp);