2 * This program is free software; you can redistribute it and/or modify
3 * it under the terms of the GNU General Public License as published by
4 * the Free Software Foundation; either version 2 of the License, or
5 * (at your option) any later version.
7 * Copyright (C) Jonathan Naylor G4KLX (g4klx@g4klx.demon.co.uk)
9 #include <linux/config.h>
10 #include <linux/module.h>
11 #include <linux/proc_fs.h>
12 #include <linux/kernel.h>
13 #include <linux/sched.h>
14 #include <linux/interrupt.h>
16 #include <linux/types.h>
17 #include <linux/sysctl.h>
18 #include <linux/string.h>
19 #include <linux/socket.h>
20 #include <linux/errno.h>
21 #include <linux/fcntl.h>
23 #include <linux/if_ether.h>
25 #include <asm/system.h>
28 #include <linux/inet.h>
29 #include <linux/netdevice.h>
30 #include <linux/etherdevice.h>
31 #include <linux/if_arp.h>
32 #include <linux/skbuff.h>
41 * Only allow IP over ROSE frames through if the netrom device is up.
44 int rose_rx_ip(struct sk_buff *skb, struct net_device *dev)
46 struct net_device_stats *stats = (struct net_device_stats *)dev->priv;
49 if (!netif_running(dev)) {
55 stats->rx_bytes += skb->len;
57 skb->protocol = htons(ETH_P_IP);
59 /* Spoof incoming device */
61 skb->h.raw = skb->data;
62 skb->nh.raw = skb->data;
63 skb->pkt_type = PACKET_HOST;
65 ip_rcv(skb, skb->dev, NULL);
72 static int rose_header(struct sk_buff *skb, struct net_device *dev, unsigned short type,
73 void *daddr, void *saddr, unsigned len)
75 unsigned char *buff = skb_push(skb, ROSE_MIN_LEN + 2);
77 *buff++ = ROSE_GFI | ROSE_Q_BIT;
89 static int rose_rebuild_header(struct sk_buff *skb)
91 struct net_device *dev = skb->dev;
92 struct net_device_stats *stats = (struct net_device_stats *)dev->priv;
93 unsigned char *bp = (unsigned char *)skb->data;
97 if (arp_find(bp + 7, skb)) {
101 if ((skbn = skb_clone(skb, GFP_ATOMIC)) == NULL) {
107 skb_set_owner_w(skbn, skb->sk);
111 if (!rose_route_frame(skbn, NULL)) {
118 stats->tx_bytes += skbn->len;
123 static int rose_set_mac_address(struct net_device *dev, void *addr)
125 struct sockaddr *sa = addr;
127 rose_del_loopback_node((rose_address *)dev->dev_addr);
129 memcpy(dev->dev_addr, sa->sa_data, dev->addr_len);
131 rose_add_loopback_node((rose_address *)dev->dev_addr);
136 static int rose_open(struct net_device *dev)
138 netif_start_queue(dev);
139 rose_add_loopback_node((rose_address *)dev->dev_addr);
143 static int rose_close(struct net_device *dev)
145 netif_stop_queue(dev);
146 rose_del_loopback_node((rose_address *)dev->dev_addr);
150 static int rose_xmit(struct sk_buff *skb, struct net_device *dev)
152 struct net_device_stats *stats = (struct net_device_stats *)dev->priv;
154 if (!netif_running(dev)) {
155 printk(KERN_ERR "ROSE: rose_xmit - called when iface is down\n");
163 static struct net_device_stats *rose_get_stats(struct net_device *dev)
165 return (struct net_device_stats *)dev->priv;
168 void rose_setup(struct net_device *dev)
170 SET_MODULE_OWNER(dev);
171 dev->mtu = ROSE_MAX_PACKET_SIZE - 2;
172 dev->hard_start_xmit = rose_xmit;
173 dev->open = rose_open;
174 dev->stop = rose_close;
176 dev->hard_header = rose_header;
177 dev->hard_header_len = AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN;
178 dev->addr_len = ROSE_ADDR_LEN;
179 dev->type = ARPHRD_ROSE;
180 dev->rebuild_header = rose_rebuild_header;
181 dev->set_mac_address = rose_set_mac_address;
183 /* New-style flags. */
185 dev->get_stats = rose_get_stats;