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/*
* ROSE release 003
*
* This code REQUIRES 2.1.15 or higher/ NET3.038
*
* This module:
* This module 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.
*
* History
* ROSE 001 Jonathan(G4KLX) Cloned from nr_dev.c.
* Hans(PE1AYX) Fixed interface to IP layer.
*/
#include <linux/config.h>
#if defined(CONFIG_ROSE) || defined(CONFIG_ROSE_MODULE)
#define __NO_VERSION__
#include <linux/module.h>
#include <linux/proc_fs.h>
#include <linux/kernel.h>
#include <linux/sched.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> /* For the statistics structure. */
#include <asm/system.h>
#include <asm/segment.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>
/*
* Only allow IP over ROSE frames through if the netrom device is up.
*/
int rose_rx_ip(struct sk_buff *skb, struct device *dev)
{
struct net_device_stats *stats = (struct net_device_stats *)dev->priv;
if (!dev->start) {
stats->rx_errors++;
return 0;
}
stats->rx_packets++;
stats->rx_bytes += skb->len;
skb->protocol = htons(ETH_P_IP);
/* Spoof incoming device */
skb->dev = dev;
skb->h.raw = skb->data;
skb->nh.raw = skb->data;
skb->pkt_type = PACKET_HOST;
ip_rcv(skb, skb->dev, NULL);
return 1;
}
static int rose_header(struct sk_buff *skb, struct device *dev, unsigned short type,
void *daddr, 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 device *dev = skb->dev;
struct net_device_stats *stats = (struct net_device_stats *)dev->priv;
unsigned char *bp = (unsigned char *)skb->data;
struct sk_buff *skbn;
if (arp_find(bp + 7, skb)) {
#if 0
/* BUGGGG! If arp_find returned 1, skb does not exist. --ANK*/
kfree_skb(skb);
#endif
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);
if (!rose_route_frame(skbn, NULL)) {
kfree_skb(skbn);
stats->tx_errors++;
}
stats->tx_packets++;
stats->tx_bytes += skbn->len;
return 1;
}
static int rose_set_mac_address(struct device *dev, void *addr)
{
struct sockaddr *sa = addr;
ax25_listen_release((ax25_address *)dev->dev_addr, NULL);
memcpy(dev->dev_addr, sa->sa_data, dev->addr_len);
ax25_listen_register((ax25_address *)dev->dev_addr, NULL);
return 0;
}
static int rose_open(struct device *dev)
{
dev->tbusy = 0;
dev->start = 1;
MOD_INC_USE_COUNT;
ax25_listen_register((ax25_address *)dev->dev_addr, NULL);
return 0;
}
static int rose_close(struct device *dev)
{
dev->tbusy = 1;
dev->start = 0;
MOD_DEC_USE_COUNT;
ax25_listen_release((ax25_address *)dev->dev_addr, NULL);
return 0;
}
static int rose_xmit(struct sk_buff *skb, struct device *dev)
{
struct net_device_stats *stats = (struct net_device_stats *)dev->priv;
if (skb == NULL || dev == NULL)
return 0;
if (!dev->start) {
printk(KERN_ERR "ROSE: rose_xmit - called when iface is down\n");
return 1;
}
cli();
if (dev->tbusy != 0) {
sti();
stats->tx_errors++;
return 1;
}
dev->tbusy = 1;
sti();
kfree_skb(skb);
stats->tx_errors++;
dev->tbusy = 0;
mark_bh(NET_BH);
return 0;
}
static struct net_device_stats *rose_get_stats(struct device *dev)
{
return (struct net_device_stats *)dev->priv;
}
int rose_init(struct device *dev)
{
dev->mtu = ROSE_MAX_PACKET_SIZE - 2;
dev->tbusy = 0;
dev->hard_start_xmit = rose_xmit;
dev->open = rose_open;
dev->stop = rose_close;
dev->hard_header = rose_header;
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->rebuild_header = rose_rebuild_header;
dev->set_mac_address = rose_set_mac_address;
/* New-style flags. */
dev->flags = 0;
if ((dev->priv = kmalloc(sizeof(struct net_device_stats), GFP_KERNEL)) == NULL)
return -ENOMEM;
memset(dev->priv, 0, sizeof(struct net_device_stats));
dev->get_stats = rose_get_stats;
dev_init_buffers(dev);
return 0;
};
#endif
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