4 * This code REQUIRES 2.1.15 or higher/ NET3.038
7 * This module is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License
9 * as published by the Free Software Foundation; either version
10 * 2 of the License, or (at your option) any later version.
13 * ROSE 001 Jonathan(G4KLX) Cloned from nr_dev.c.
14 * Hans(PE1AYX) Fixed interface to IP layer.
17 #include <linux/config.h>
18 #define __NO_VERSION__
19 #include <linux/module.h>
20 #include <linux/proc_fs.h>
21 #include <linux/kernel.h>
22 #include <linux/sched.h>
23 #include <linux/interrupt.h>
25 #include <linux/types.h>
26 #include <linux/sysctl.h>
27 #include <linux/string.h>
28 #include <linux/socket.h>
29 #include <linux/errno.h>
30 #include <linux/fcntl.h>
32 #include <linux/if_ether.h> /* For the statistics structure. */
34 #include <asm/system.h>
35 #include <asm/segment.h>
38 #include <linux/inet.h>
39 #include <linux/netdevice.h>
40 #include <linux/etherdevice.h>
41 #include <linux/if_arp.h>
42 #include <linux/skbuff.h>
51 * Only allow IP over ROSE frames through if the netrom device is up.
54 int rose_rx_ip(struct sk_buff *skb, struct net_device *dev)
56 struct net_device_stats *stats = (struct net_device_stats *)dev->priv;
59 if (!netif_running(dev)) {
65 stats->rx_bytes += skb->len;
67 skb->protocol = htons(ETH_P_IP);
69 /* Spoof incoming device */
71 skb->h.raw = skb->data;
72 skb->nh.raw = skb->data;
73 skb->pkt_type = PACKET_HOST;
75 ip_rcv(skb, skb->dev, NULL);
82 static int rose_header(struct sk_buff *skb, struct net_device *dev, unsigned short type,
83 void *daddr, void *saddr, unsigned len)
85 unsigned char *buff = skb_push(skb, ROSE_MIN_LEN + 2);
87 *buff++ = ROSE_GFI | ROSE_Q_BIT;
99 static int rose_rebuild_header(struct sk_buff *skb)
101 struct net_device *dev = skb->dev;
102 struct net_device_stats *stats = (struct net_device_stats *)dev->priv;
103 unsigned char *bp = (unsigned char *)skb->data;
104 struct sk_buff *skbn;
107 if (arp_find(bp + 7, skb)) {
111 if ((skbn = skb_clone(skb, GFP_ATOMIC)) == NULL) {
117 skb_set_owner_w(skbn, skb->sk);
121 if (!rose_route_frame(skbn, NULL)) {
128 stats->tx_bytes += skbn->len;
133 static int rose_set_mac_address(struct net_device *dev, void *addr)
135 struct sockaddr *sa = addr;
137 rose_del_loopback_node((rose_address *)dev->dev_addr);
139 memcpy(dev->dev_addr, sa->sa_data, dev->addr_len);
141 rose_add_loopback_node((rose_address *)dev->dev_addr);
146 static int rose_open(struct net_device *dev)
149 netif_start_queue(dev);
150 rose_add_loopback_node((rose_address *)dev->dev_addr);
154 static int rose_close(struct net_device *dev)
156 netif_stop_queue(dev);
157 rose_del_loopback_node((rose_address *)dev->dev_addr);
162 static int rose_xmit(struct sk_buff *skb, struct net_device *dev)
164 struct net_device_stats *stats = (struct net_device_stats *)dev->priv;
166 if (!netif_running(dev)) {
167 printk(KERN_ERR "ROSE: rose_xmit - called when iface is down\n");
175 static struct net_device_stats *rose_get_stats(struct net_device *dev)
177 return (struct net_device_stats *)dev->priv;
180 int rose_init(struct net_device *dev)
182 dev->mtu = ROSE_MAX_PACKET_SIZE - 2;
183 dev->hard_start_xmit = rose_xmit;
184 dev->open = rose_open;
185 dev->stop = rose_close;
187 dev->hard_header = rose_header;
188 dev->hard_header_len = AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN;
189 dev->addr_len = ROSE_ADDR_LEN;
190 dev->type = ARPHRD_ROSE;
191 dev->rebuild_header = rose_rebuild_header;
192 dev->set_mac_address = rose_set_mac_address;
194 /* New-style flags. */
197 if ((dev->priv = kmalloc(sizeof(struct net_device_stats), GFP_KERNEL)) == NULL)
200 memset(dev->priv, 0, sizeof(struct net_device_stats));
202 dev->get_stats = rose_get_stats;