Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
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 | */ | |
1da177e4 LT |
9 | #include <linux/module.h> |
10 | #include <linux/proc_fs.h> | |
11 | #include <linux/kernel.h> | |
12 | #include <linux/sched.h> | |
13 | #include <linux/interrupt.h> | |
14 | #include <linux/fs.h> | |
15 | #include <linux/types.h> | |
16 | #include <linux/sysctl.h> | |
17 | #include <linux/string.h> | |
18 | #include <linux/socket.h> | |
19 | #include <linux/errno.h> | |
20 | #include <linux/fcntl.h> | |
21 | #include <linux/in.h> | |
22 | #include <linux/if_ether.h> | |
23 | ||
24 | #include <asm/system.h> | |
25 | #include <asm/io.h> | |
26 | ||
27 | #include <linux/inet.h> | |
28 | #include <linux/netdevice.h> | |
29 | #include <linux/etherdevice.h> | |
30 | #include <linux/if_arp.h> | |
31 | #include <linux/skbuff.h> | |
32 | ||
33 | #include <net/ip.h> | |
34 | #include <net/arp.h> | |
35 | ||
36 | #include <net/ax25.h> | |
37 | #include <net/rose.h> | |
38 | ||
39 | static int rose_header(struct sk_buff *skb, struct net_device *dev, unsigned short type, | |
40 | void *daddr, void *saddr, unsigned len) | |
41 | { | |
42 | unsigned char *buff = skb_push(skb, ROSE_MIN_LEN + 2); | |
43 | ||
44 | *buff++ = ROSE_GFI | ROSE_Q_BIT; | |
45 | *buff++ = 0x00; | |
46 | *buff++ = ROSE_DATA; | |
47 | *buff++ = 0x7F; | |
48 | *buff++ = AX25_P_IP; | |
49 | ||
50 | if (daddr != NULL) | |
51 | return 37; | |
52 | ||
53 | return -37; | |
54 | } | |
55 | ||
56 | static int rose_rebuild_header(struct sk_buff *skb) | |
57 | { | |
58 | struct net_device *dev = skb->dev; | |
59 | struct net_device_stats *stats = netdev_priv(dev); | |
60 | unsigned char *bp = (unsigned char *)skb->data; | |
61 | struct sk_buff *skbn; | |
8dc22d2b | 62 | unsigned int len; |
1da177e4 LT |
63 | |
64 | #ifdef CONFIG_INET | |
65 | if (arp_find(bp + 7, skb)) { | |
66 | return 1; | |
67 | } | |
68 | ||
69 | if ((skbn = skb_clone(skb, GFP_ATOMIC)) == NULL) { | |
70 | kfree_skb(skb); | |
71 | return 1; | |
72 | } | |
73 | ||
74 | if (skb->sk != NULL) | |
75 | skb_set_owner_w(skbn, skb->sk); | |
76 | ||
77 | kfree_skb(skb); | |
78 | ||
8dc22d2b RB |
79 | len = skbn->len; |
80 | ||
1da177e4 LT |
81 | if (!rose_route_frame(skbn, NULL)) { |
82 | kfree_skb(skbn); | |
83 | stats->tx_errors++; | |
84 | return 1; | |
85 | } | |
86 | ||
87 | stats->tx_packets++; | |
8dc22d2b | 88 | stats->tx_bytes += len; |
1da177e4 LT |
89 | #endif |
90 | return 1; | |
91 | } | |
92 | ||
93 | static int rose_set_mac_address(struct net_device *dev, void *addr) | |
94 | { | |
95 | struct sockaddr *sa = addr; | |
96 | ||
97 | rose_del_loopback_node((rose_address *)dev->dev_addr); | |
98 | ||
99 | memcpy(dev->dev_addr, sa->sa_data, dev->addr_len); | |
100 | ||
101 | rose_add_loopback_node((rose_address *)dev->dev_addr); | |
102 | ||
103 | return 0; | |
104 | } | |
105 | ||
106 | static int rose_open(struct net_device *dev) | |
107 | { | |
108 | netif_start_queue(dev); | |
109 | rose_add_loopback_node((rose_address *)dev->dev_addr); | |
110 | return 0; | |
111 | } | |
112 | ||
113 | static int rose_close(struct net_device *dev) | |
114 | { | |
115 | netif_stop_queue(dev); | |
116 | rose_del_loopback_node((rose_address *)dev->dev_addr); | |
117 | return 0; | |
118 | } | |
119 | ||
120 | static int rose_xmit(struct sk_buff *skb, struct net_device *dev) | |
121 | { | |
122 | struct net_device_stats *stats = netdev_priv(dev); | |
123 | ||
124 | if (!netif_running(dev)) { | |
125 | printk(KERN_ERR "ROSE: rose_xmit - called when iface is down\n"); | |
126 | return 1; | |
127 | } | |
128 | dev_kfree_skb(skb); | |
129 | stats->tx_errors++; | |
130 | return 0; | |
131 | } | |
132 | ||
133 | static struct net_device_stats *rose_get_stats(struct net_device *dev) | |
134 | { | |
135 | return netdev_priv(dev); | |
136 | } | |
137 | ||
138 | void rose_setup(struct net_device *dev) | |
139 | { | |
1da177e4 LT |
140 | dev->mtu = ROSE_MAX_PACKET_SIZE - 2; |
141 | dev->hard_start_xmit = rose_xmit; | |
142 | dev->open = rose_open; | |
143 | dev->stop = rose_close; | |
144 | ||
145 | dev->hard_header = rose_header; | |
146 | dev->hard_header_len = AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN; | |
147 | dev->addr_len = ROSE_ADDR_LEN; | |
148 | dev->type = ARPHRD_ROSE; | |
149 | dev->rebuild_header = rose_rebuild_header; | |
150 | dev->set_mac_address = rose_set_mac_address; | |
151 | ||
152 | /* New-style flags. */ | |
d2ce4bc3 | 153 | dev->flags = IFF_NOARP; |
1da177e4 LT |
154 | dev->get_stats = rose_get_stats; |
155 | } |