forked from luck/tmp_suning_uos_patched
95c9617472
Use of "unsigned int" is preferred to bare "unsigned" in net tree. Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
213 lines
4.3 KiB
C
213 lines
4.3 KiB
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 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> /* For the statistics structure. */
|
|
#include <linux/slab.h>
|
|
|
|
#include <asm/uaccess.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/netrom.h>
|
|
|
|
/*
|
|
* Only allow IP over NET/ROM frames through if the netrom device is up.
|
|
*/
|
|
|
|
int nr_rx_ip(struct sk_buff *skb, struct net_device *dev)
|
|
{
|
|
struct net_device_stats *stats = &dev->stats;
|
|
|
|
if (!netif_running(dev)) {
|
|
stats->rx_dropped++;
|
|
return 0;
|
|
}
|
|
|
|
stats->rx_packets++;
|
|
stats->rx_bytes += skb->len;
|
|
|
|
skb->protocol = htons(ETH_P_IP);
|
|
|
|
/* Spoof incoming device */
|
|
skb->dev = dev;
|
|
skb->mac_header = skb->network_header;
|
|
skb_reset_network_header(skb);
|
|
skb->pkt_type = PACKET_HOST;
|
|
|
|
netif_rx(skb);
|
|
|
|
return 1;
|
|
}
|
|
|
|
#ifdef CONFIG_INET
|
|
|
|
static int nr_rebuild_header(struct sk_buff *skb)
|
|
{
|
|
unsigned char *bp = skb->data;
|
|
|
|
if (arp_find(bp + 7, skb))
|
|
return 1;
|
|
|
|
bp[6] &= ~AX25_CBIT;
|
|
bp[6] &= ~AX25_EBIT;
|
|
bp[6] |= AX25_SSSID_SPARE;
|
|
bp += AX25_ADDR_LEN;
|
|
|
|
bp[6] &= ~AX25_CBIT;
|
|
bp[6] |= AX25_EBIT;
|
|
bp[6] |= AX25_SSSID_SPARE;
|
|
|
|
return 0;
|
|
}
|
|
|
|
#else
|
|
|
|
static int nr_rebuild_header(struct sk_buff *skb)
|
|
{
|
|
return 1;
|
|
}
|
|
|
|
#endif
|
|
|
|
static int nr_header(struct sk_buff *skb, struct net_device *dev,
|
|
unsigned short type,
|
|
const void *daddr, const void *saddr, unsigned int len)
|
|
{
|
|
unsigned char *buff = skb_push(skb, NR_NETWORK_LEN + NR_TRANSPORT_LEN);
|
|
|
|
memcpy(buff, (saddr != NULL) ? saddr : dev->dev_addr, dev->addr_len);
|
|
buff[6] &= ~AX25_CBIT;
|
|
buff[6] &= ~AX25_EBIT;
|
|
buff[6] |= AX25_SSSID_SPARE;
|
|
buff += AX25_ADDR_LEN;
|
|
|
|
if (daddr != NULL)
|
|
memcpy(buff, daddr, dev->addr_len);
|
|
buff[6] &= ~AX25_CBIT;
|
|
buff[6] |= AX25_EBIT;
|
|
buff[6] |= AX25_SSSID_SPARE;
|
|
buff += AX25_ADDR_LEN;
|
|
|
|
*buff++ = sysctl_netrom_network_ttl_initialiser;
|
|
|
|
*buff++ = NR_PROTO_IP;
|
|
*buff++ = NR_PROTO_IP;
|
|
*buff++ = 0;
|
|
*buff++ = 0;
|
|
*buff++ = NR_PROTOEXT;
|
|
|
|
if (daddr != NULL)
|
|
return 37;
|
|
|
|
return -37;
|
|
}
|
|
|
|
static int __must_check nr_set_mac_address(struct net_device *dev, void *addr)
|
|
{
|
|
struct sockaddr *sa = addr;
|
|
int err;
|
|
|
|
if (!memcmp(dev->dev_addr, sa->sa_data, dev->addr_len))
|
|
return 0;
|
|
|
|
if (dev->flags & IFF_UP) {
|
|
err = ax25_listen_register((ax25_address *)sa->sa_data, NULL);
|
|
if (err)
|
|
return err;
|
|
|
|
ax25_listen_release((ax25_address *)dev->dev_addr, NULL);
|
|
}
|
|
|
|
memcpy(dev->dev_addr, sa->sa_data, dev->addr_len);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int nr_open(struct net_device *dev)
|
|
{
|
|
int err;
|
|
|
|
err = ax25_listen_register((ax25_address *)dev->dev_addr, NULL);
|
|
if (err)
|
|
return err;
|
|
|
|
netif_start_queue(dev);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int nr_close(struct net_device *dev)
|
|
{
|
|
ax25_listen_release((ax25_address *)dev->dev_addr, NULL);
|
|
netif_stop_queue(dev);
|
|
return 0;
|
|
}
|
|
|
|
static netdev_tx_t nr_xmit(struct sk_buff *skb, struct net_device *dev)
|
|
{
|
|
struct net_device_stats *stats = &dev->stats;
|
|
unsigned int len = skb->len;
|
|
|
|
if (!nr_route_frame(skb, NULL)) {
|
|
kfree_skb(skb);
|
|
stats->tx_errors++;
|
|
return NETDEV_TX_OK;
|
|
}
|
|
|
|
stats->tx_packets++;
|
|
stats->tx_bytes += len;
|
|
|
|
return NETDEV_TX_OK;
|
|
}
|
|
|
|
static const struct header_ops nr_header_ops = {
|
|
.create = nr_header,
|
|
.rebuild= nr_rebuild_header,
|
|
};
|
|
|
|
static const struct net_device_ops nr_netdev_ops = {
|
|
.ndo_open = nr_open,
|
|
.ndo_stop = nr_close,
|
|
.ndo_start_xmit = nr_xmit,
|
|
.ndo_set_mac_address = nr_set_mac_address,
|
|
};
|
|
|
|
void nr_setup(struct net_device *dev)
|
|
{
|
|
dev->mtu = NR_MAX_PACKET_SIZE;
|
|
dev->netdev_ops = &nr_netdev_ops;
|
|
dev->header_ops = &nr_header_ops;
|
|
dev->hard_header_len = NR_NETWORK_LEN + NR_TRANSPORT_LEN;
|
|
dev->addr_len = AX25_ADDR_LEN;
|
|
dev->type = ARPHRD_NETROM;
|
|
|
|
/* New-style flags. */
|
|
dev->flags = IFF_NOARP;
|
|
}
|