cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
Log | Files | Refs | README | LICENSE | sfeed.txt

slip_kern.c (2091B)

      1// SPDX-License-Identifier: GPL-2.0
      2/*
      3 * Copyright (C) 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
      4 */
      5
      6#include <linux/if_arp.h>
      7#include <linux/init.h>
      8#include <linux/netdevice.h>
      9#include <net_kern.h>
     10#include "slip.h"
     11
     12struct slip_init {
     13	char *gate_addr;
     14};
     15
     16static void slip_init(struct net_device *dev, void *data)
     17{
     18	struct uml_net_private *private;
     19	struct slip_data *spri;
     20	struct slip_init *init = data;
     21
     22	private = netdev_priv(dev);
     23	spri = (struct slip_data *) private->user;
     24
     25	memset(spri->name, 0, sizeof(spri->name));
     26	spri->addr = NULL;
     27	spri->gate_addr = init->gate_addr;
     28	spri->slave = -1;
     29	spri->dev = dev;
     30
     31	slip_proto_init(&spri->slip);
     32
     33	dev->hard_header_len = 0;
     34	dev->header_ops = NULL;
     35	dev->addr_len = 0;
     36	dev->type = ARPHRD_SLIP;
     37	dev->tx_queue_len = 256;
     38	dev->flags = IFF_NOARP;
     39	printk("SLIP backend - SLIP IP = %s\n", spri->gate_addr);
     40}
     41
     42static unsigned short slip_protocol(struct sk_buff *skbuff)
     43{
     44	return htons(ETH_P_IP);
     45}
     46
     47static int slip_read(int fd, struct sk_buff *skb, struct uml_net_private *lp)
     48{
     49	return slip_user_read(fd, skb_mac_header(skb), skb->dev->mtu,
     50			      (struct slip_data *) &lp->user);
     51}
     52
     53static int slip_write(int fd, struct sk_buff *skb, struct uml_net_private *lp)
     54{
     55	return slip_user_write(fd, skb->data, skb->len,
     56			       (struct slip_data *) &lp->user);
     57}
     58
     59static const struct net_kern_info slip_kern_info = {
     60	.init			= slip_init,
     61	.protocol		= slip_protocol,
     62	.read			= slip_read,
     63	.write			= slip_write,
     64};
     65
     66static int slip_setup(char *str, char **mac_out, void *data)
     67{
     68	struct slip_init *init = data;
     69
     70	*init = ((struct slip_init) { .gate_addr = NULL });
     71
     72	if (str[0] != '\0')
     73		init->gate_addr = str;
     74	return 1;
     75}
     76
     77static struct transport slip_transport = {
     78	.list 		= LIST_HEAD_INIT(slip_transport.list),
     79	.name 		= "slip",
     80	.setup  	= slip_setup,
     81	.user 		= &slip_user_info,
     82	.kern 		= &slip_kern_info,
     83	.private_size 	= sizeof(struct slip_data),
     84	.setup_size 	= sizeof(struct slip_init),
     85};
     86
     87static int register_slip(void)
     88{
     89	register_transport(&slip_transport);
     90	return 0;
     91}
     92
     93late_initcall(register_slip);