94 lines
2.0 KiB
C
94 lines
2.0 KiB
C
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// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (C) 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
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*/
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#include <linux/if_arp.h>
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#include <linux/init.h>
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#include <linux/netdevice.h>
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#include <net_kern.h>
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#include "slip.h"
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struct slip_init {
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char *gate_addr;
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};
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static void slip_init(struct net_device *dev, void *data)
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{
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struct uml_net_private *private;
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struct slip_data *spri;
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struct slip_init *init = data;
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private = netdev_priv(dev);
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spri = (struct slip_data *) private->user;
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memset(spri->name, 0, sizeof(spri->name));
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spri->addr = NULL;
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spri->gate_addr = init->gate_addr;
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spri->slave = -1;
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spri->dev = dev;
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slip_proto_init(&spri->slip);
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dev->hard_header_len = 0;
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dev->header_ops = NULL;
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dev->addr_len = 0;
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dev->type = ARPHRD_SLIP;
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dev->tx_queue_len = 256;
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dev->flags = IFF_NOARP;
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printk("SLIP backend - SLIP IP = %s\n", spri->gate_addr);
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}
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static unsigned short slip_protocol(struct sk_buff *skbuff)
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{
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return htons(ETH_P_IP);
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}
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static int slip_read(int fd, struct sk_buff *skb, struct uml_net_private *lp)
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{
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return slip_user_read(fd, skb_mac_header(skb), skb->dev->mtu,
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(struct slip_data *) &lp->user);
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}
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static int slip_write(int fd, struct sk_buff *skb, struct uml_net_private *lp)
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{
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return slip_user_write(fd, skb->data, skb->len,
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(struct slip_data *) &lp->user);
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}
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static const struct net_kern_info slip_kern_info = {
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.init = slip_init,
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.protocol = slip_protocol,
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.read = slip_read,
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.write = slip_write,
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};
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static int slip_setup(char *str, char **mac_out, void *data)
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{
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struct slip_init *init = data;
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*init = ((struct slip_init) { .gate_addr = NULL });
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if (str[0] != '\0')
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init->gate_addr = str;
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return 1;
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}
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static struct transport slip_transport = {
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.list = LIST_HEAD_INIT(slip_transport.list),
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.name = "slip",
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.setup = slip_setup,
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.user = &slip_user_info,
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.kern = &slip_kern_info,
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.private_size = sizeof(struct slip_data),
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.setup_size = sizeof(struct slip_init),
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};
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static int register_slip(void)
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{
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register_transport(&slip_transport);
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return 0;
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}
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late_initcall(register_slip);
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