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/*
* Copyright 1996 The Australian National University.
* Copyright 1996 Fujitsu Laboratories Limited
*
* This software may be distributed under the terms of the Gnu
* Public License version 2 or later
*/
/*
* $Id: bif.c,v 1.13 1996/12/18 01:45:52 tridge Exp $
*
* Network interface definitions for bif device.
*/
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/interrupt.h>
#include <linux/fs.h>
#include <linux/types.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 <linux/netdevice.h>
#include <linux/if_arp.h> /* For ARPHRD_BIF */
#include <asm/system.h>
#include <asm/segment.h>
#include <asm/io.h>
#include <linux/inet.h>
#include <linux/etherdevice.h>
#include <linux/skbuff.h>
#include <net/sock.h>
#include <asm/ap1000/apservice.h>
#include <asm/ap1000/apreg.h>
#define BIF_DEBUG 0
#if BIF_DEBUG
static int seq = 0;
#endif
#define BIF_MTU 10240
static struct net_device *bif_device = 0;
static struct net_device_stats *bif_stats = 0;
int bif_init(struct net_device *dev);
int bif_open(struct net_device *dev);
static int bif_xmit(struct sk_buff *skb, struct net_device *dev);
int bif_rx(struct sk_buff *skb);
int bif_stop(struct net_device *dev);
static struct net_device_stats *bif_get_stats(struct net_device *dev);
static int bif_hard_header(struct sk_buff *skb, struct net_device *dev,
unsigned short type, void *daddr,
void *saddr, unsigned len)
{
#if BIF_DEBUG
printk("bif_hard_header()\n");
#endif
skb_push(skb,dev->hard_header_len);
if (daddr) skb->arp = 1;
/* tell IP how much space we took */
return (dev->hard_header_len);
}
static int bif_rebuild_header(void *buff, struct net_device *dev,
unsigned long raddr, struct sk_buff *skb)
{
/* this would normally be used to fill in hardware addresses after
an ARP */
#if BIF_DEBUG
printk("bif_rebuild_header()\n");
#endif
if (skb) skb->arp = 1;
return(0);
}
static int bif_set_mac_address(struct net_device *dev, void *addr)
{
printk("BIF: set_mac_address called\n");
return (0);
}
static void bif_set_multicast_list(struct net_device *dev)
{
return;
}
static int bif_do_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
{
printk("BIF: Called do_ioctl\n");
return (0);
}
static int bif_set_config(struct net_device *dev, struct ifmap *map)
{
printk("BIF: Called bif_set_config\n");
return (0);
}
/*
* Initialise bif network interface.
*/
int bif_init(struct net_device *dev)
{
int i;
printk("bif_init(): Initialising bif interface\n");
bif_device = dev;
dev->mtu = BIF_MTU;
dev->tbusy = 0;
dev->hard_start_xmit = bif_xmit;
dev->hard_header = bif_hard_header;
dev->hard_header_len = sizeof(struct cap_request);
dev->addr_len = 0;
dev->tx_queue_len = 50000; /* no limit (almost!) */
dev->type = ARPHRD_BIF;
dev->rebuild_header = bif_rebuild_header;
dev->open = bif_open;
dev->flags = IFF_NOARP; /* Don't use ARP on this device */
dev->priv = kmalloc(sizeof(struct net_device_stats), GFP_KERNEL);
if (dev->priv == NULL)
return -ENOMEM;
memset(dev->priv, 0, sizeof(struct net_device_stats));
bif_stats = (struct net_device_stats *)bif_device->priv;
dev->stop = bif_stop;
dev->get_stats = bif_get_stats;
dev->set_mac_address = bif_set_mac_address;
dev->header_cache_update = NULL;
dev->do_ioctl = bif_do_ioctl;
dev->set_config = bif_set_config;
dev->set_multicast_list = bif_set_multicast_list;
memset(dev->broadcast, 0xFF, ETH_ALEN);
dev_init_buffers(dev);
return(0);
}
int bif_open(struct net_device *dev)
{
printk("In bif_open\n");
dev->tbusy = 0;
dev->start = 1;
return 0;
}
#if BIF_DEBUG
static void dump_packet(char *action, char *buf, int len, int seq)
{
int flags;
char *sep;
printk("%s packet %d of %d bytes at %d:\n", action, seq,
len, (int)jiffies);
printk(" from %x to %x pktid=%d ttl=%d pcol=%d len=%d\n",
*(long *)(buf+12), *(long *)(buf+16), *(u_short *)(buf+4),
*(unsigned char *)(buf+8), buf[9], *(u_short *)(buf+2));
if( buf[9] == 6 || buf[9] == 17 ){
/* TCP or UDP */
printk(" sport=%d dport=%d",
*(u_short *)(buf+20), *(u_short *)(buf+22));
if( buf[9] == 6 ){
printk(" seq=%d ack=%d win=%d flags=<",
*(long *)(buf+24), *(long *)(buf+28),
*(unsigned short *)(buf+34));
flags = buf[33];
sep = "";
printk(">");
}
printk("\n");
}
else {
printk(" protocol = %d\n", buf[9]);
}
}
#endif
static int bif_xmit(struct sk_buff *skb, struct net_device *dev)
{
extern int bif_send_ip(int cid,struct sk_buff *skb);
extern int tnet_send_ip(int cid,struct sk_buff *skb);
extern int msc_blocked, tnet_ip_enabled;
u_long destip;
int cid;
if (skb == NULL || dev == NULL)
return(0);
destip = *(u_long *)(skb->data+sizeof(struct cap_request)+16);
cid = ap_ip_to_cid(destip);
skb->dev = dev;
skb->mac.raw = skb->data;
if (cid != -1 && tnet_ip_enabled && !msc_blocked) {
tnet_send_ip(cid,skb);
} else {
bif_send_ip(cid, skb);
}
dev->tbusy = 0;
bif_stats->tx_packets++;
mark_bh(NET_BH);
return 0;
}
/*
* Receive a packet from the BIF - called from interrupt handler.
*/
int bif_rx(struct sk_buff *skb)
{
#if BIF_DEBUG
dump_packet("bif_rx:", skb->data, skb->len, seq++);
#endif
if (bif_device == NULL) {
printk("bif: bif_device is NULL in bif_rx\n");
dev_kfree_skb(skb);
return 0;
}
skb->dev = bif_device;
skb->protocol = ETH_P_IP;
#if 1
/* try disabling checksums on receive */
if (ap_ip_to_cid(*(u_long *)(((char *)skb->data)+12)) != -1)
skb->ip_summed = CHECKSUM_UNNECESSARY;
#endif
/*
* Inform the network layer of the new packet.
*/
skb->mac.raw = skb->data;
netif_rx(skb);
if (bif_stats == NULL) {
printk("bif: bif_stats is NULL is bif_rx\n");
return 0;
}
bif_stats->rx_packets++;
return 0;
}
int bif_stop(struct net_device *dev)
{
printk("in bif_close\n");
dev->tbusy = 1;
dev->start = 0;
return 0;
}
/*
* Return statistics of bif driver.
*/
static struct net_device_stats *bif_get_stats(struct net_device *dev)
{
return((struct net_device_stats *)dev->priv);
}
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