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93 lines
2.0 KiB
93 lines
2.0 KiB
// 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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