87 lines
2.0 KiB
C
87 lines
2.0 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (C) 2001 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
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*/
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#include <linux/netdevice.h>
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#include <linux/init.h>
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#include <linux/skbuff.h>
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#include <asm/errno.h>
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#include <net_kern.h>
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#include "tuntap.h"
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struct tuntap_init {
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char *dev_name;
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char *gate_addr;
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};
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static void tuntap_init(struct net_device *dev, void *data)
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{
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struct uml_net_private *pri;
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struct tuntap_data *tpri;
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struct tuntap_init *init = data;
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pri = netdev_priv(dev);
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tpri = (struct tuntap_data *) pri->user;
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tpri->dev_name = init->dev_name;
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tpri->fixed_config = (init->dev_name != NULL);
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tpri->gate_addr = init->gate_addr;
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tpri->fd = -1;
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tpri->dev = dev;
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printk(KERN_INFO "TUN/TAP backend - ");
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if (tpri->gate_addr != NULL)
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printk(KERN_CONT "IP = %s", tpri->gate_addr);
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printk(KERN_CONT "\n");
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}
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static int tuntap_read(int fd, struct sk_buff *skb, struct uml_net_private *lp)
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{
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return net_read(fd, skb_mac_header(skb),
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skb->dev->mtu + ETH_HEADER_OTHER);
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}
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static int tuntap_write(int fd, struct sk_buff *skb, struct uml_net_private *lp)
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{
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return net_write(fd, skb->data, skb->len);
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}
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const struct net_kern_info tuntap_kern_info = {
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.init = tuntap_init,
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.protocol = eth_protocol,
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.read = tuntap_read,
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.write = tuntap_write,
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};
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int tuntap_setup(char *str, char **mac_out, void *data)
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{
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struct tuntap_init *init = data;
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*init = ((struct tuntap_init)
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{ .dev_name = NULL,
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.gate_addr = NULL });
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if (tap_setup_common(str, "tuntap", &init->dev_name, mac_out,
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&init->gate_addr))
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return 0;
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return 1;
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}
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static struct transport tuntap_transport = {
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.list = LIST_HEAD_INIT(tuntap_transport.list),
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.name = "tuntap",
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.setup = tuntap_setup,
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.user = &tuntap_user_info,
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.kern = &tuntap_kern_info,
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.private_size = sizeof(struct tuntap_data),
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.setup_size = sizeof(struct tuntap_init),
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};
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static int register_tuntap(void)
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{
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register_transport(&tuntap_transport);
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return 0;
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}
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late_initcall(register_tuntap);
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