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/*
* 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;
}