cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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tuntap_kern.c (2000B)

      1// SPDX-License-Identifier: GPL-2.0
      2/*
      3 * Copyright (C) 2001 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
      4 */
      5
      6#include <linux/netdevice.h>
      7#include <linux/init.h>
      8#include <linux/skbuff.h>
      9#include <asm/errno.h>
     10#include <net_kern.h>
     11#include "tuntap.h"
     12
     13struct tuntap_init {
     14	char *dev_name;
     15	char *gate_addr;
     16};
     17
     18static void tuntap_init(struct net_device *dev, void *data)
     19{
     20	struct uml_net_private *pri;
     21	struct tuntap_data *tpri;
     22	struct tuntap_init *init = data;
     23
     24	pri = netdev_priv(dev);
     25	tpri = (struct tuntap_data *) pri->user;
     26	tpri->dev_name = init->dev_name;
     27	tpri->fixed_config = (init->dev_name != NULL);
     28	tpri->gate_addr = init->gate_addr;
     29	tpri->fd = -1;
     30	tpri->dev = dev;
     31
     32	printk(KERN_INFO "TUN/TAP backend - ");
     33	if (tpri->gate_addr != NULL)
     34		printk(KERN_CONT "IP = %s", tpri->gate_addr);
     35	printk(KERN_CONT "\n");
     36}
     37
     38static int tuntap_read(int fd, struct sk_buff *skb, struct uml_net_private *lp)
     39{
     40	return net_read(fd, skb_mac_header(skb),
     41			skb->dev->mtu + ETH_HEADER_OTHER);
     42}
     43
     44static int tuntap_write(int fd, struct sk_buff *skb, struct uml_net_private *lp)
     45{
     46	return net_write(fd, skb->data, skb->len);
     47}
     48
     49const struct net_kern_info tuntap_kern_info = {
     50	.init			= tuntap_init,
     51	.protocol		= eth_protocol,
     52	.read			= tuntap_read,
     53	.write 			= tuntap_write,
     54};
     55
     56int tuntap_setup(char *str, char **mac_out, void *data)
     57{
     58	struct tuntap_init *init = data;
     59
     60	*init = ((struct tuntap_init)
     61		{ .dev_name 	= NULL,
     62		  .gate_addr 	= NULL });
     63	if (tap_setup_common(str, "tuntap", &init->dev_name, mac_out,
     64			    &init->gate_addr))
     65		return 0;
     66
     67	return 1;
     68}
     69
     70static struct transport tuntap_transport = {
     71	.list 		= LIST_HEAD_INIT(tuntap_transport.list),
     72	.name 		= "tuntap",
     73	.setup  	= tuntap_setup,
     74	.user 		= &tuntap_user_info,
     75	.kern 		= &tuntap_kern_info,
     76	.private_size 	= sizeof(struct tuntap_data),
     77	.setup_size 	= sizeof(struct tuntap_init),
     78};
     79
     80static int register_tuntap(void)
     81{
     82	register_transport(&tuntap_transport);
     83	return 0;
     84}
     85
     86late_initcall(register_tuntap);