diff options
Diffstat (limited to 'net/rose/rose_dev.c')
| -rw-r--r-- | net/rose/rose_dev.c | 154 |
1 files changed, 154 insertions, 0 deletions
diff --git a/net/rose/rose_dev.c b/net/rose/rose_dev.c new file mode 100644 index 000000000000..a8ed9a1d09f9 --- /dev/null +++ b/net/rose/rose_dev.c @@ -0,0 +1,154 @@ +/* + * 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/config.h> +#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> + +#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, + 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 net_device *dev = skb->dev; + struct net_device_stats *stats = netdev_priv(dev); + unsigned char *bp = (unsigned char *)skb->data; + struct sk_buff *skbn; + +#ifdef CONFIG_INET + 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); + + if (!rose_route_frame(skbn, NULL)) { + kfree_skb(skbn); + stats->tx_errors++; + return 1; + } + + stats->tx_packets++; + stats->tx_bytes += skbn->len; +#endif + return 1; +} + +static int rose_set_mac_address(struct net_device *dev, void *addr) +{ + struct sockaddr *sa = addr; + + rose_del_loopback_node((rose_address *)dev->dev_addr); + + memcpy(dev->dev_addr, sa->sa_data, dev->addr_len); + + rose_add_loopback_node((rose_address *)dev->dev_addr); + + return 0; +} + +static int rose_open(struct net_device *dev) +{ + netif_start_queue(dev); + rose_add_loopback_node((rose_address *)dev->dev_addr); + 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 int rose_xmit(struct sk_buff *skb, struct net_device *dev) +{ + struct net_device_stats *stats = netdev_priv(dev); + + if (!netif_running(dev)) { + printk(KERN_ERR "ROSE: rose_xmit - called when iface is down\n"); + return 1; + } + dev_kfree_skb(skb); + stats->tx_errors++; + return 0; +} + +static struct net_device_stats *rose_get_stats(struct net_device *dev) +{ + return netdev_priv(dev); +} + +void rose_setup(struct net_device *dev) +{ + SET_MODULE_OWNER(dev); + dev->mtu = ROSE_MAX_PACKET_SIZE - 2; + 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; + dev->get_stats = rose_get_stats; +} |