Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) // SPDX-License-Identifier: GPL-2.0-or-later
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3)  *	"LAPB via ethernet" driver release 001
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5)  *	This code REQUIRES 2.1.15 or higher/ NET3.038
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7)  *	This is a "pseudo" network driver to allow LAPB over Ethernet.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9)  *	This driver can use any ethernet destination address, and can be 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10)  *	limited to accept frames from one dedicated ethernet card only.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12)  *	History
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13)  *	LAPBETH 001	Jonathan Naylor		Cloned from bpqether.c
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14)  *	2000-10-29	Henner Eisen	lapb_data_indication() return status.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15)  *	2000-11-14	Henner Eisen	dev_hold/put, NETDEV_GOING_DOWN support
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18) #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20) #include <linux/errno.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) #include <linux/types.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) #include <linux/socket.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) #include <linux/in.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) #include <linux/string.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) #include <linux/net.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) #include <linux/inet.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) #include <linux/netdevice.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) #include <linux/if_arp.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) #include <linux/skbuff.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) #include <net/sock.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) #include <linux/uaccess.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) #include <linux/mm.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) #include <linux/interrupt.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) #include <linux/notifier.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) #include <linux/stat.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) #include <linux/lapb.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) #include <net/x25device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) static const u8 bcast_addr[6] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) /* If this number is made larger, check that the temporary string buffer
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47)  * in lapbeth_new_device is large enough to store the probe device name.*/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) #define MAXLAPBDEV 100
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) struct lapbethdev {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) 	struct list_head	node;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) 	struct net_device	*ethdev;	/* link to ethernet device */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) 	struct net_device	*axdev;		/* lapbeth device (lapb#) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) 	bool			up;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) 	spinlock_t		up_lock;	/* Protects "up" */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) static LIST_HEAD(lapbeth_devices);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) /* ------------------------------------------------------------------------ */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63)  *	Get the LAPB device for the ethernet device
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) static struct lapbethdev *lapbeth_get_x25_dev(struct net_device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) 	struct lapbethdev *lapbeth;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) 	list_for_each_entry_rcu(lapbeth, &lapbeth_devices, node, lockdep_rtnl_is_held()) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) 		if (lapbeth->ethdev == dev) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) 			return lapbeth;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) 	return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) static __inline__ int dev_is_ethdev(struct net_device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) 	return dev->type == ARPHRD_ETHER && strncmp(dev->name, "dummy", 5);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) /* ------------------------------------------------------------------------ */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84)  *	Receive a LAPB frame via an ethernet interface.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) static int lapbeth_rcv(struct sk_buff *skb, struct net_device *dev, struct packet_type *ptype, struct net_device *orig_dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) 	int len, err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) 	struct lapbethdev *lapbeth;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) 	if (dev_net(dev) != &init_net)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) 		goto drop;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) 	if ((skb = skb_share_check(skb, GFP_ATOMIC)) == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) 		return NET_RX_DROP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) 	if (!pskb_may_pull(skb, 2))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) 		goto drop;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) 	rcu_read_lock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) 	lapbeth = lapbeth_get_x25_dev(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) 	if (!lapbeth)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) 		goto drop_unlock_rcu;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) 	spin_lock_bh(&lapbeth->up_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) 	if (!lapbeth->up)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) 		goto drop_unlock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) 	len = skb->data[0] + skb->data[1] * 256;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) 	dev->stats.rx_packets++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) 	dev->stats.rx_bytes += len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) 	skb_pull(skb, 2);	/* Remove the length bytes */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) 	skb_trim(skb, len);	/* Set the length of the data */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) 	if ((err = lapb_data_received(lapbeth->axdev, skb)) != LAPB_OK) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) 		printk(KERN_DEBUG "lapbether: lapb_data_received err - %d\n", err);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) 		goto drop_unlock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) 	spin_unlock_bh(&lapbeth->up_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) 	rcu_read_unlock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) drop_unlock:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) 	kfree_skb(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) 	goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) drop_unlock_rcu:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) 	rcu_read_unlock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) drop:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) 	kfree_skb(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) static int lapbeth_data_indication(struct net_device *dev, struct sk_buff *skb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) 	unsigned char *ptr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) 	if (skb_cow(skb, 1)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) 		kfree_skb(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) 		return NET_RX_DROP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) 	skb_push(skb, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) 	ptr  = skb->data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 	*ptr = X25_IFACE_DATA;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) 	skb->protocol = x25_type_trans(skb, dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) 	return netif_rx(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152)  *	Send a LAPB frame via an ethernet interface
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) static netdev_tx_t lapbeth_xmit(struct sk_buff *skb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) 				      struct net_device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) 	struct lapbethdev *lapbeth = netdev_priv(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) 	int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) 	spin_lock_bh(&lapbeth->up_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) 	if (!lapbeth->up)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) 		goto drop;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) 	/* There should be a pseudo header of 1 byte added by upper layers.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) 	 * Check to make sure it is there before reading it.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) 	if (skb->len < 1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) 		goto drop;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) 	switch (skb->data[0]) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) 	case X25_IFACE_DATA:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) 	case X25_IFACE_CONNECT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) 		if ((err = lapb_connect_request(dev)) != LAPB_OK)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) 			pr_err("lapb_connect_request error: %d\n", err);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) 		goto drop;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) 	case X25_IFACE_DISCONNECT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) 		if ((err = lapb_disconnect_request(dev)) != LAPB_OK)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) 			pr_err("lapb_disconnect_request err: %d\n", err);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) 		fallthrough;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) 	default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) 		goto drop;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) 	skb_pull(skb, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) 	if ((err = lapb_data_request(dev, skb)) != LAPB_OK) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) 		pr_err("lapb_data_request error - %d\n", err);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) 		goto drop;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) 	spin_unlock_bh(&lapbeth->up_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) 	return NETDEV_TX_OK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) drop:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) 	kfree_skb(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) 	goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) static void lapbeth_data_transmit(struct net_device *ndev, struct sk_buff *skb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) 	struct lapbethdev *lapbeth = netdev_priv(ndev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) 	unsigned char *ptr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) 	struct net_device *dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) 	int size = skb->len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) 	ptr = skb_push(skb, 2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) 	*ptr++ = size % 256;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) 	*ptr++ = size / 256;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) 	ndev->stats.tx_packets++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) 	ndev->stats.tx_bytes += size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) 	skb->dev = dev = lapbeth->ethdev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) 	skb->protocol = htons(ETH_P_DEC);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) 	skb_reset_network_header(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) 	dev_hard_header(skb, dev, ETH_P_DEC, bcast_addr, NULL, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) 	dev_queue_xmit(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) static void lapbeth_connected(struct net_device *dev, int reason)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) 	unsigned char *ptr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) 	struct sk_buff *skb = dev_alloc_skb(1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) 	if (!skb) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) 		pr_err("out of memory\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) 		return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) 	ptr  = skb_put(skb, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) 	*ptr = X25_IFACE_CONNECT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) 	skb->protocol = x25_type_trans(skb, dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) 	netif_rx(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) static void lapbeth_disconnected(struct net_device *dev, int reason)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) 	unsigned char *ptr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) 	struct sk_buff *skb = dev_alloc_skb(1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) 	if (!skb) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) 		pr_err("out of memory\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) 		return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) 	ptr  = skb_put(skb, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) 	*ptr = X25_IFACE_DISCONNECT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) 	skb->protocol = x25_type_trans(skb, dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) 	netif_rx(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260)  *	Set AX.25 callsign
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) static int lapbeth_set_mac_address(struct net_device *dev, void *addr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) 	struct sockaddr *sa = addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) 	memcpy(dev->dev_addr, sa->sa_data, dev->addr_len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) static const struct lapb_register_struct lapbeth_callbacks = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) 	.connect_confirmation    = lapbeth_connected,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) 	.connect_indication      = lapbeth_connected,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) 	.disconnect_confirmation = lapbeth_disconnected,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) 	.disconnect_indication   = lapbeth_disconnected,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) 	.data_indication         = lapbeth_data_indication,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) 	.data_transmit           = lapbeth_data_transmit,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280)  * open/close a device
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) static int lapbeth_open(struct net_device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) 	struct lapbethdev *lapbeth = netdev_priv(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) 	int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) 	if ((err = lapb_register(dev, &lapbeth_callbacks)) != LAPB_OK) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) 		pr_err("lapb_register error: %d\n", err);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) 		return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) 	spin_lock_bh(&lapbeth->up_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) 	lapbeth->up = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) 	spin_unlock_bh(&lapbeth->up_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) static int lapbeth_close(struct net_device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) 	struct lapbethdev *lapbeth = netdev_priv(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) 	int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) 	spin_lock_bh(&lapbeth->up_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) 	lapbeth->up = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) 	spin_unlock_bh(&lapbeth->up_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) 	if ((err = lapb_unregister(dev)) != LAPB_OK)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) 		pr_err("lapb_unregister error: %d\n", err);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) /* ------------------------------------------------------------------------ */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) static const struct net_device_ops lapbeth_netdev_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) 	.ndo_open	     = lapbeth_open,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) 	.ndo_stop	     = lapbeth_close,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) 	.ndo_start_xmit	     = lapbeth_xmit,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) 	.ndo_set_mac_address = lapbeth_set_mac_address,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) static void lapbeth_setup(struct net_device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) 	dev->netdev_ops	     = &lapbeth_netdev_ops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) 	dev->needs_free_netdev = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) 	dev->type            = ARPHRD_X25;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) 	dev->hard_header_len = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) 	dev->mtu             = 1000;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) 	dev->addr_len        = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334)  *	Setup a new device.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) static int lapbeth_new_device(struct net_device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) 	struct net_device *ndev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) 	struct lapbethdev *lapbeth;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) 	int rc = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) 	ASSERT_RTNL();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) 	ndev = alloc_netdev(sizeof(*lapbeth), "lapb%d", NET_NAME_UNKNOWN,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) 			    lapbeth_setup);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) 	if (!ndev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) 		goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) 	/* When transmitting data:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) 	 * first this driver removes a pseudo header of 1 byte,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) 	 * then the lapb module prepends an LAPB header of at most 3 bytes,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) 	 * then this driver prepends a length field of 2 bytes,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) 	 * then the underlying Ethernet device prepends its own header.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) 	ndev->needed_headroom = -1 + 3 + 2 + dev->hard_header_len
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) 					   + dev->needed_headroom;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) 	ndev->needed_tailroom = dev->needed_tailroom;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) 	lapbeth = netdev_priv(ndev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) 	lapbeth->axdev = ndev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) 	dev_hold(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) 	lapbeth->ethdev = dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) 	lapbeth->up = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) 	spin_lock_init(&lapbeth->up_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) 	rc = -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) 	if (register_netdevice(ndev))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) 		goto fail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) 	list_add_rcu(&lapbeth->node, &lapbeth_devices);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) 	rc = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) 	return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) fail:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) 	dev_put(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) 	free_netdev(ndev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) 	goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383)  *	Free a lapb network device.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) static void lapbeth_free_device(struct lapbethdev *lapbeth)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) 	dev_put(lapbeth->ethdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) 	list_del_rcu(&lapbeth->node);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) 	unregister_netdevice(lapbeth->axdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393)  *	Handle device status changes.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395)  * Called from notifier with RTNL held.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) static int lapbeth_device_event(struct notifier_block *this,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) 				unsigned long event, void *ptr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) 	struct lapbethdev *lapbeth;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) 	struct net_device *dev = netdev_notifier_info_to_dev(ptr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) 	if (dev_net(dev) != &init_net)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) 		return NOTIFY_DONE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) 	if (!dev_is_ethdev(dev))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) 		return NOTIFY_DONE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) 	switch (event) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) 	case NETDEV_UP:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) 		/* New ethernet device -> new LAPB interface	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) 		if (lapbeth_get_x25_dev(dev) == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) 			lapbeth_new_device(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) 	case NETDEV_DOWN:	
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) 		/* ethernet device closed -> close LAPB interface */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) 		lapbeth = lapbeth_get_x25_dev(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) 		if (lapbeth) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) 			dev_close(lapbeth->axdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) 	case NETDEV_UNREGISTER:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422) 		/* ethernet device disappears -> remove LAPB interface */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) 		lapbeth = lapbeth_get_x25_dev(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) 		if (lapbeth)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) 			lapbeth_free_device(lapbeth);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429) 	return NOTIFY_DONE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432) /* ------------------------------------------------------------------------ */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434) static struct packet_type lapbeth_packet_type __read_mostly = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435) 	.type = cpu_to_be16(ETH_P_DEC),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436) 	.func = lapbeth_rcv,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439) static struct notifier_block lapbeth_dev_notifier = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440) 	.notifier_call = lapbeth_device_event,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443) static const char banner[] __initconst =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444) 	KERN_INFO "LAPB Ethernet driver version 0.02\n";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446) static int __init lapbeth_init_driver(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448) 	dev_add_pack(&lapbeth_packet_type);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450) 	register_netdevice_notifier(&lapbeth_dev_notifier);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452) 	printk(banner);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456) module_init(lapbeth_init_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458) static void __exit lapbeth_cleanup_driver(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460) 	struct lapbethdev *lapbeth;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461) 	struct list_head *entry, *tmp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463) 	dev_remove_pack(&lapbeth_packet_type);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464) 	unregister_netdevice_notifier(&lapbeth_dev_notifier);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466) 	rtnl_lock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467) 	list_for_each_safe(entry, tmp, &lapbeth_devices) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468) 		lapbeth = list_entry(entry, struct lapbethdev, node);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470) 		dev_put(lapbeth->ethdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471) 		unregister_netdevice(lapbeth->axdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473) 	rtnl_unlock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 474) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475) module_exit(lapbeth_cleanup_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 476) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 477) MODULE_AUTHOR("Jonathan Naylor <g4klx@g4klx.demon.co.uk>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 478) MODULE_DESCRIPTION("The unofficial LAPB over Ethernet driver");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 479) MODULE_LICENSE("GPL");