blob: 8d88795dc663497654aeb0eb292fa91680e260c1 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
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.
6 *
7 * Copyright (C) Jonathan Naylor G4KLX (g4klx@g4klx.demon.co.uk)
8 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07009#include <linux/module.h>
10#include <linux/proc_fs.h>
11#include <linux/kernel.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070012#include <linux/interrupt.h>
13#include <linux/fs.h>
14#include <linux/types.h>
15#include <linux/sysctl.h>
16#include <linux/string.h>
17#include <linux/socket.h>
18#include <linux/errno.h>
19#include <linux/fcntl.h>
20#include <linux/in.h>
21#include <linux/if_ether.h>
22
23#include <asm/system.h>
24#include <asm/io.h>
25
26#include <linux/inet.h>
27#include <linux/netdevice.h>
28#include <linux/etherdevice.h>
29#include <linux/if_arp.h>
30#include <linux/skbuff.h>
31
32#include <net/ip.h>
33#include <net/arp.h>
34
35#include <net/ax25.h>
36#include <net/rose.h>
37
38static int rose_header(struct sk_buff *skb, struct net_device *dev, unsigned short type,
39 void *daddr, void *saddr, unsigned len)
40{
41 unsigned char *buff = skb_push(skb, ROSE_MIN_LEN + 2);
42
43 *buff++ = ROSE_GFI | ROSE_Q_BIT;
44 *buff++ = 0x00;
45 *buff++ = ROSE_DATA;
46 *buff++ = 0x7F;
47 *buff++ = AX25_P_IP;
48
49 if (daddr != NULL)
50 return 37;
51
52 return -37;
53}
54
55static int rose_rebuild_header(struct sk_buff *skb)
56{
57 struct net_device *dev = skb->dev;
58 struct net_device_stats *stats = netdev_priv(dev);
59 unsigned char *bp = (unsigned char *)skb->data;
60 struct sk_buff *skbn;
Ralf Baechle8dc22d22006-07-03 19:29:15 -070061 unsigned int len;
Linus Torvalds1da177e2005-04-16 15:20:36 -070062
63#ifdef CONFIG_INET
64 if (arp_find(bp + 7, skb)) {
65 return 1;
66 }
67
68 if ((skbn = skb_clone(skb, GFP_ATOMIC)) == NULL) {
69 kfree_skb(skb);
70 return 1;
71 }
72
73 if (skb->sk != NULL)
74 skb_set_owner_w(skbn, skb->sk);
75
76 kfree_skb(skb);
77
Ralf Baechle8dc22d22006-07-03 19:29:15 -070078 len = skbn->len;
79
Linus Torvalds1da177e2005-04-16 15:20:36 -070080 if (!rose_route_frame(skbn, NULL)) {
81 kfree_skb(skbn);
82 stats->tx_errors++;
83 return 1;
84 }
85
86 stats->tx_packets++;
Ralf Baechle8dc22d22006-07-03 19:29:15 -070087 stats->tx_bytes += len;
Linus Torvalds1da177e2005-04-16 15:20:36 -070088#endif
89 return 1;
90}
91
92static int rose_set_mac_address(struct net_device *dev, void *addr)
93{
94 struct sockaddr *sa = addr;
Ralf Baechlea159aaa2006-12-14 15:51:44 -080095 int err;
Linus Torvalds1da177e2005-04-16 15:20:36 -070096
Ralf Baechlea159aaa2006-12-14 15:51:44 -080097 if (!memcpy(dev->dev_addr, sa->sa_data, dev->addr_len))
98 return 0;
99
100 if (dev->flags & IFF_UP) {
101 err = rose_add_loopback_node((rose_address *)dev->dev_addr);
102 if (err)
103 return err;
104
105 rose_del_loopback_node((rose_address *)dev->dev_addr);
106 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700107
108 memcpy(dev->dev_addr, sa->sa_data, dev->addr_len);
109
Linus Torvalds1da177e2005-04-16 15:20:36 -0700110 return 0;
111}
112
113static int rose_open(struct net_device *dev)
114{
Ralf Baechlea159aaa2006-12-14 15:51:44 -0800115 int err;
116
117 err = rose_add_loopback_node((rose_address *)dev->dev_addr);
118 if (err)
119 return err;
120
Linus Torvalds1da177e2005-04-16 15:20:36 -0700121 netif_start_queue(dev);
Ralf Baechlea159aaa2006-12-14 15:51:44 -0800122
Linus Torvalds1da177e2005-04-16 15:20:36 -0700123 return 0;
124}
125
126static int rose_close(struct net_device *dev)
127{
128 netif_stop_queue(dev);
129 rose_del_loopback_node((rose_address *)dev->dev_addr);
130 return 0;
131}
132
133static int rose_xmit(struct sk_buff *skb, struct net_device *dev)
134{
135 struct net_device_stats *stats = netdev_priv(dev);
136
137 if (!netif_running(dev)) {
138 printk(KERN_ERR "ROSE: rose_xmit - called when iface is down\n");
139 return 1;
140 }
141 dev_kfree_skb(skb);
142 stats->tx_errors++;
143 return 0;
144}
145
146static struct net_device_stats *rose_get_stats(struct net_device *dev)
147{
148 return netdev_priv(dev);
149}
150
151void rose_setup(struct net_device *dev)
152{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700153 dev->mtu = ROSE_MAX_PACKET_SIZE - 2;
154 dev->hard_start_xmit = rose_xmit;
155 dev->open = rose_open;
156 dev->stop = rose_close;
157
158 dev->hard_header = rose_header;
159 dev->hard_header_len = AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN;
160 dev->addr_len = ROSE_ADDR_LEN;
161 dev->type = ARPHRD_ROSE;
162 dev->rebuild_header = rose_rebuild_header;
163 dev->set_mac_address = rose_set_mac_address;
164
165 /* New-style flags. */
Ralf Baechled2ce4bc2005-09-12 14:26:52 -0700166 dev->flags = IFF_NOARP;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700167 dev->get_stats = rose_get_stats;
168}