[linux-2.6-block.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 <linux/slab.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)
{
#ifdef CONFIG_INET
	struct net_device *dev = skb->dev;
	struct net_device_stats *stats = &dev->stats;
	unsigned char *bp = (unsigned char *)skb->data;
	struct sk_buff *skbn;
	unsigned int len;

	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 netdev_tx_t rose_xmit(struct sk_buff *skb, struct net_device *dev)
{
	struct net_device_stats *stats = &dev->stats;

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

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

static const struct net_device_ops rose_netdev_ops = {
	.ndo_open		= rose_open,
	.ndo_stop		= rose_close,
	.ndo_start_xmit		= rose_xmit,
	.ndo_set_mac_address    = rose_set_mac_address,
};

void rose_setup(struct net_device *dev)
{
	dev->mtu		= ROSE_MAX_PACKET_SIZE - 2;
	dev->netdev_ops		= &rose_netdev_ops;

	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;

	/* New-style flags. */
	dev->flags		= IFF_NOARP;
}
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>
5a0e3ad6	22	#include <linux/slab.h>
1da177e4 LT	23
	24	#include <asm/system.h>
	25	#include <asm/io.h>
	26
	27	#include <linux/inet.h>
	28	#include <linux/netdevice.h>
	29	#include <linux/etherdevice.h>
	30	#include <linux/if_arp.h>
	31	#include <linux/skbuff.h>
	32
	33	#include <net/ip.h>
	34	#include <net/arp.h>
	35
	36	#include <net/ax25.h>
	37	#include <net/rose.h>
	38
3b04ddde SH	39	static int rose_header(struct sk_buff skb, struct net_device dev,
	40	unsigned short type,
	41	const void daddr, const void saddr, unsigned len)
1da177e4 LT	42	{
	43	unsigned char *buff = skb_push(skb, ROSE_MIN_LEN + 2);
	44
	45	*buff++ = ROSE_GFI \| ROSE_Q_BIT;
	46	*buff++ = 0x00;
	47	*buff++ = ROSE_DATA;
	48	*buff++ = 0x7F;
	49	*buff++ = AX25_P_IP;
	50
	51	if (daddr != NULL)
	52	return 37;
	53
	54	return -37;
	55	}
	56
	57	static int rose_rebuild_header(struct sk_buff *skb)
	58	{
78f150bf	59	#ifdef CONFIG_INET
1da177e4	60	struct net_device *dev = skb->dev;
d289d120	61	struct net_device_stats *stats = &dev->stats;
1da177e4 LT	62	unsigned char bp = (unsigned char )skb->data;
1da177e4 LT	63	struct sk_buff *skbn;
8dc22d2b	64	unsigned int len;
1da177e4	65
1da177e4 LT	66	if (arp_find(bp + 7, skb)) {
	67	return 1;
	68	}
	69
	70	if ((skbn = skb_clone(skb, GFP_ATOMIC)) == NULL) {
	71	kfree_skb(skb);
	72	return 1;
	73	}
	74
	75	if (skb->sk != NULL)
	76	skb_set_owner_w(skbn, skb->sk);
	77
	78	kfree_skb(skb);
	79
8dc22d2b RB	80	len = skbn->len;
8dc22d2b RB	81
1da177e4 LT	82	if (!rose_route_frame(skbn, NULL)) {
	83	kfree_skb(skbn);
	84	stats->tx_errors++;
	85	return 1;
	86	}
	87
	88	stats->tx_packets++;
8dc22d2b	89	stats->tx_bytes += len;
1da177e4 LT	90	#endif
	91	return 1;
	92	}
	93
	94	static int rose_set_mac_address(struct net_device dev, void addr)
	95	{
	96	struct sockaddr *sa = addr;
a159aaa3	97	int err;
1da177e4	98
a159aaa3 RB	99	if (!memcpy(dev->dev_addr, sa->sa_data, dev->addr_len))
a159aaa3 RB	100	return 0;
1da177e4	101
a159aaa3 RB	102	if (dev->flags & IFF_UP) {
	103	err = rose_add_loopback_node((rose_address *)dev->dev_addr);
	104	if (err)
	105	return err;
	106
	107	rose_del_loopback_node((rose_address *)dev->dev_addr);
	108	}
1da177e4	109
a159aaa3	110	memcpy(dev->dev_addr, sa->sa_data, dev->addr_len);
1da177e4 LT	111
	112	return 0;
	113	}
	114
	115	static int rose_open(struct net_device *dev)
	116	{
a159aaa3 RB	117	int err;
	118
	119	err = rose_add_loopback_node((rose_address *)dev->dev_addr);
	120	if (err)
	121	return err;
	122
1da177e4	123	netif_start_queue(dev);
a159aaa3	124
1da177e4 LT	125	return 0;
	126	}
	127
	128	static int rose_close(struct net_device *dev)
	129	{
	130	netif_stop_queue(dev);
	131	rose_del_loopback_node((rose_address *)dev->dev_addr);
	132	return 0;
	133	}
	134
36e4d64a	135	static netdev_tx_t rose_xmit(struct sk_buff skb, struct net_device dev)
1da177e4	136	{
d289d120	137	struct net_device_stats *stats = &dev->stats;
1da177e4 LT	138
	139	if (!netif_running(dev)) {
	140	printk(KERN_ERR "ROSE: rose_xmit - called when iface is down\n");
5b548140	141	return NETDEV_TX_BUSY;
1da177e4 LT	142	}
	143	dev_kfree_skb(skb);
	144	stats->tx_errors++;
6ed10654	145	return NETDEV_TX_OK;
1da177e4 LT	146	}
1da177e4 LT	147
3b04ddde SH	148	static const struct header_ops rose_header_ops = {
	149	.create = rose_header,
	150	.rebuild= rose_rebuild_header,
	151	};
	152
3170c656 SH	153	static const struct net_device_ops rose_netdev_ops = {
	154	.ndo_open = rose_open,
	155	.ndo_stop = rose_close,
	156	.ndo_start_xmit = rose_xmit,
	157	.ndo_set_mac_address = rose_set_mac_address,
	158	};
	159
1da177e4 LT	160	void rose_setup(struct net_device *dev)
1da177e4 LT	161	{
1da177e4	162	dev->mtu = ROSE_MAX_PACKET_SIZE - 2;
3170c656	163	dev->netdev_ops = &rose_netdev_ops;
1da177e4	164
3b04ddde	165	dev->header_ops = &rose_header_ops;
1da177e4 LT	166	dev->hard_header_len = AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN;
	167	dev->addr_len = ROSE_ADDR_LEN;
	168	dev->type = ARPHRD_ROSE;
1da177e4 LT	169
1da177e4 LT	170	/* New-style flags. */
d2ce4bc3	171	dev->flags = IFF_NOARP;
1da177e4	172	}