Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  1) // SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  3)  * Copyright (C) 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6) #include <linux/if_arp.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8) #include <linux/netdevice.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9) #include <net_kern.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include "slip.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) struct slip_init {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) 	char *gate_addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) static void slip_init(struct net_device *dev, void *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) 	struct uml_net_private *private;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) 	struct slip_data *spri;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) 	struct slip_init *init = data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) 	private = netdev_priv(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) 	spri = (struct slip_data *) private->user;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) 	memset(spri->name, 0, sizeof(spri->name));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) 	spri->addr = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) 	spri->gate_addr = init->gate_addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) 	spri->slave = -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) 	spri->dev = dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) 	slip_proto_init(&spri->slip);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) 	dev->hard_header_len = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) 	dev->header_ops = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) 	dev->addr_len = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) 	dev->type = ARPHRD_SLIP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) 	dev->tx_queue_len = 256;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) 	dev->flags = IFF_NOARP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) 	printk("SLIP backend - SLIP IP = %s\n", spri->gate_addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) static unsigned short slip_protocol(struct sk_buff *skbuff)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) 	return htons(ETH_P_IP);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) static int slip_read(int fd, struct sk_buff *skb, struct uml_net_private *lp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) 	return slip_user_read(fd, skb_mac_header(skb), skb->dev->mtu,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) 			      (struct slip_data *) &lp->user);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) static int slip_write(int fd, struct sk_buff *skb, struct uml_net_private *lp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) 	return slip_user_write(fd, skb->data, skb->len,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) 			       (struct slip_data *) &lp->user);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) static const struct net_kern_info slip_kern_info = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) 	.init			= slip_init,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) 	.protocol		= slip_protocol,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) 	.read			= slip_read,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) 	.write			= slip_write,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) static int slip_setup(char *str, char **mac_out, void *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) 	struct slip_init *init = data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) 	*init = ((struct slip_init) { .gate_addr = NULL });
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) 	if (str[0] != '\0')
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) 		init->gate_addr = str;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) 	return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) static struct transport slip_transport = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) 	.list 		= LIST_HEAD_INIT(slip_transport.list),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) 	.name 		= "slip",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) 	.setup  	= slip_setup,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) 	.user 		= &slip_user_info,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) 	.kern 		= &slip_kern_info,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) 	.private_size 	= sizeof(struct slip_data),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) 	.setup_size 	= sizeof(struct slip_init),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) static int register_slip(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) 	register_transport(&slip_transport);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) late_initcall(register_slip);