[net-next-2.6.git] / net / rose / rose_dev.c

/*
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * Copyright (C) Jonathan Naylor G4KLX (g4klx@g4klx.demon.co.uk)
 */
#include <linux/module.h>
#include <linux/proc_fs.h>
#include <linux/kernel.h>
#include <linux/interrupt.h>
#include <linux/fs.h>
#include <linux/types.h>
#include <linux/sysctl.h>
#include <linux/string.h>
#include <linux/socket.h>
#include <linux/errno.h>
#include <linux/fcntl.h>
#include <linux/in.h>
#include <linux/if_ether.h>

#include <asm/system.h>
#include <asm/io.h>

#include <linux/inet.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/if_arp.h>
#include <linux/skbuff.h>

#include <net/ip.h>
#include <net/arp.h>

#include <net/ax25.h>
#include <net/rose.h>

static int rose_header(struct sk_buff *skb, struct net_device *dev,
		       unsigned short type,
		       const void *daddr, const void *saddr, unsigned len)
{
	unsigned char *buff = skb_push(skb, ROSE_MIN_LEN + 2);

	*buff++ = ROSE_GFI | ROSE_Q_BIT;
	*buff++ = 0x00;
	*buff++ = ROSE_DATA;
	*buff++ = 0x7F;
	*buff++ = AX25_P_IP;

	if (daddr != NULL)
		return 37;

	return -37;
}

static int rose_rebuild_header(struct sk_buff *skb)
{
	struct net_device *dev = skb->dev;
	struct net_device_stats *stats = netdev_priv(dev);
	unsigned char *bp = (unsigned char *)skb->data;
	struct sk_buff *skbn;
	unsigned int len;

#ifdef CONFIG_INET
	if (arp_find(bp + 7, skb)) {
		return 1;
	}

	if ((skbn = skb_clone(skb, GFP_ATOMIC)) == NULL) {
		kfree_skb(skb);
		return 1;
	}

	if (skb->sk != NULL)
		skb_set_owner_w(skbn, skb->sk);

	kfree_skb(skb);

	len = skbn->len;

	if (!rose_route_frame(skbn, NULL)) {
		kfree_skb(skbn);
		stats->tx_errors++;
		return 1;
	}

	stats->tx_packets++;
	stats->tx_bytes += len;
#endif
	return 1;
}

static int rose_set_mac_address(struct net_device *dev, void *addr)
{
	struct sockaddr *sa = addr;
	int err;

	if (!memcpy(dev->dev_addr, sa->sa_data, dev->addr_len))
		return 0;

	if (dev->flags & IFF_UP) {
		err = rose_add_loopback_node((rose_address *)dev->dev_addr);
		if (err)
			return err;

		rose_del_loopback_node((rose_address *)dev->dev_addr);
	}

	memcpy(dev->dev_addr, sa->sa_data, dev->addr_len);

	return 0;
}

static int rose_open(struct net_device *dev)
{
	int err;

	err = rose_add_loopback_node((rose_address *)dev->dev_addr);
	if (err)
		return err;

	netif_start_queue(dev);

	return 0;
}

static int rose_close(struct net_device *dev)
{
	netif_stop_queue(dev);
	rose_del_loopback_node((rose_address *)dev->dev_addr);
	return 0;
}

static int rose_xmit(struct sk_buff *skb, struct net_device *dev)
{
	struct net_device_stats *stats = netdev_priv(dev);

	if (!netif_running(dev)) {
		printk(KERN_ERR "ROSE: rose_xmit - called when iface is down\n");
		return 1;
	}
	dev_kfree_skb(skb);
	stats->tx_errors++;
	return 0;
}

static struct net_device_stats *rose_get_stats(struct net_device *dev)
{
	return netdev_priv(dev);
}

static const struct header_ops rose_header_ops = {
	.create	= rose_header,
	.rebuild= rose_rebuild_header,
};

void rose_setup(struct net_device *dev)
{
	dev->mtu		= ROSE_MAX_PACKET_SIZE - 2;
	dev->hard_start_xmit	= rose_xmit;
	dev->open		= rose_open;
	dev->stop		= rose_close;

	dev->header_ops		= &rose_header_ops;
	dev->hard_header_len	= AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN;
	dev->addr_len		= ROSE_ADDR_LEN;
	dev->type		= ARPHRD_ROSE;
	dev->set_mac_address    = rose_set_mac_address;

	/* New-style flags. */
	dev->flags		= IFF_NOARP;
	dev->get_stats = rose_get_stats;
}
Commit	Line	Data
1da177e4 LT	1	/*
	2	* This program is free software; you can redistribute it and/or modify
	3	* it under the terms of the GNU General Public License as published by
	4	* the Free Software Foundation; either version 2 of the License, or
	5	* (at your option) any later version.
	6	*
	7	* Copyright (C) Jonathan Naylor G4KLX (g4klx@g4klx.demon.co.uk)
	8	*/
1da177e4 LT	9	#include <linux/module.h>
	10	#include <linux/proc_fs.h>
	11	#include <linux/kernel.h>
1da177e4 LT	12	#include <linux/interrupt.h>
	13	#include <linux/fs.h>
	14	#include <linux/types.h>
	15	#include <linux/sysctl.h>
	16	#include <linux/string.h>
	17	#include <linux/socket.h>
	18	#include <linux/errno.h>
	19	#include <linux/fcntl.h>
	20	#include <linux/in.h>
	21	#include <linux/if_ether.h>
	22
	23	#include <asm/system.h>
	24	#include <asm/io.h>
	25
	26	#include <linux/inet.h>
	27	#include <linux/netdevice.h>
	28	#include <linux/etherdevice.h>
	29	#include <linux/if_arp.h>
	30	#include <linux/skbuff.h>
	31
	32	#include <net/ip.h>
	33	#include <net/arp.h>
	34
	35	#include <net/ax25.h>
	36	#include <net/rose.h>
	37
3b04ddde SH	38	static int rose_header(struct sk_buff skb, struct net_device dev,
	39	unsigned short type,
	40	const void daddr, const void saddr, unsigned len)
1da177e4 LT	41	{
	42	unsigned char *buff = skb_push(skb, ROSE_MIN_LEN + 2);
	43
	44	*buff++ = ROSE_GFI \| ROSE_Q_BIT;
	45	*buff++ = 0x00;
	46	*buff++ = ROSE_DATA;
	47	*buff++ = 0x7F;
	48	*buff++ = AX25_P_IP;
	49
	50	if (daddr != NULL)
	51	return 37;
	52
	53	return -37;
	54	}
	55
	56	static int rose_rebuild_header(struct sk_buff *skb)
	57	{
	58	struct net_device *dev = skb->dev;
	59	struct net_device_stats *stats = netdev_priv(dev);
	60	unsigned char bp = (unsigned char )skb->data;
	61	struct sk_buff *skbn;
8dc22d2b	62	unsigned int len;
1da177e4 LT	63
	64	#ifdef CONFIG_INET
	65	if (arp_find(bp + 7, skb)) {
	66	return 1;
	67	}
	68
	69	if ((skbn = skb_clone(skb, GFP_ATOMIC)) == NULL) {
	70	kfree_skb(skb);
	71	return 1;
	72	}
	73
	74	if (skb->sk != NULL)
	75	skb_set_owner_w(skbn, skb->sk);
	76
	77	kfree_skb(skb);
	78
8dc22d2b RB	79	len = skbn->len;
8dc22d2b RB	80
1da177e4 LT	81	if (!rose_route_frame(skbn, NULL)) {
	82	kfree_skb(skbn);
	83	stats->tx_errors++;
	84	return 1;
	85	}
	86
	87	stats->tx_packets++;
8dc22d2b	88	stats->tx_bytes += len;
1da177e4 LT	89	#endif
	90	return 1;
	91	}
	92
	93	static int rose_set_mac_address(struct net_device dev, void addr)
	94	{
	95	struct sockaddr *sa = addr;
a159aaa3	96	int err;
1da177e4	97
a159aaa3 RB	98	if (!memcpy(dev->dev_addr, sa->sa_data, dev->addr_len))
a159aaa3 RB	99	return 0;
1da177e4	100
a159aaa3 RB	101	if (dev->flags & IFF_UP) {
	102	err = rose_add_loopback_node((rose_address *)dev->dev_addr);
	103	if (err)
	104	return err;
	105
	106	rose_del_loopback_node((rose_address *)dev->dev_addr);
	107	}
1da177e4	108
a159aaa3	109	memcpy(dev->dev_addr, sa->sa_data, dev->addr_len);
1da177e4 LT	110
	111	return 0;
	112	}
	113
	114	static int rose_open(struct net_device *dev)
	115	{
a159aaa3 RB	116	int err;
	117
	118	err = rose_add_loopback_node((rose_address *)dev->dev_addr);
	119	if (err)
	120	return err;
	121
1da177e4	122	netif_start_queue(dev);
a159aaa3	123
1da177e4 LT	124	return 0;
	125	}
	126
	127	static int rose_close(struct net_device *dev)
	128	{
	129	netif_stop_queue(dev);
	130	rose_del_loopback_node((rose_address *)dev->dev_addr);
	131	return 0;
	132	}
	133
	134	static int rose_xmit(struct sk_buff skb, struct net_device dev)
	135	{
	136	struct net_device_stats *stats = netdev_priv(dev);
	137
	138	if (!netif_running(dev)) {
	139	printk(KERN_ERR "ROSE: rose_xmit - called when iface is down\n");
	140	return 1;
	141	}
	142	dev_kfree_skb(skb);
	143	stats->tx_errors++;
	144	return 0;
	145	}
	146
	147	static struct net_device_stats rose_get_stats(struct net_device dev)
	148	{
	149	return netdev_priv(dev);
	150	}
	151
3b04ddde SH	152	static const struct header_ops rose_header_ops = {
	153	.create = rose_header,
	154	.rebuild= rose_rebuild_header,
	155	};
	156
1da177e4 LT	157	void rose_setup(struct net_device *dev)
1da177e4 LT	158	{
1da177e4 LT	159	dev->mtu = ROSE_MAX_PACKET_SIZE - 2;
	160	dev->hard_start_xmit = rose_xmit;
	161	dev->open = rose_open;
	162	dev->stop = rose_close;
	163
3b04ddde	164	dev->header_ops = &rose_header_ops;
1da177e4 LT	165	dev->hard_header_len = AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN;
	166	dev->addr_len = ROSE_ADDR_LEN;
	167	dev->type = ARPHRD_ROSE;
1da177e4 LT	168	dev->set_mac_address = rose_set_mac_address;
	169
	170	/* New-style flags. */
d2ce4bc3	171	dev->flags = IFF_NOARP;
1da177e4 LT	172	dev->get_stats = rose_get_stats;
1da177e4 LT	173	}