1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
|
/*
* 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/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;
unsigned int len;
#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);
len = skbn->len;
if (!rose_route_frame(skbn, NULL)) {
kfree_skb(skbn);
stats->tx_errors++;
return 1;
}
stats->tx_packets++;
stats->tx_bytes += len;
#endif
return 1;
}
static int rose_set_mac_address(struct net_device *dev, void *addr)
{
struct sockaddr *sa = addr;
int err;
if (!memcpy(dev->dev_addr, sa->sa_data, dev->addr_len))
return 0;
if (dev->flags & IFF_UP) {
err = rose_add_loopback_node((rose_address *)dev->dev_addr);
if (err)
return err;
rose_del_loopback_node((rose_address *)dev->dev_addr);
}
memcpy(dev->dev_addr, sa->sa_data, dev->addr_len);
return 0;
}
static int rose_open(struct net_device *dev)
{
int err;
err = rose_add_loopback_node((rose_address *)dev->dev_addr);
if (err)
return err;
netif_start_queue(dev);
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)
{
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 = IFF_NOARP;
dev->get_stats = rose_get_stats;
}
|
