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Commit | Line | Data |
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2874c5fd | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
1da177e4 | 2 | /* |
1da177e4 LT |
3 | * |
4 | * Copyright (C) Jonathan Naylor G4KLX (g4klx@g4klx.demon.co.uk) | |
5 | */ | |
1da177e4 LT |
6 | #include <linux/module.h> |
7 | #include <linux/proc_fs.h> | |
8 | #include <linux/kernel.h> | |
1da177e4 LT |
9 | #include <linux/interrupt.h> |
10 | #include <linux/fs.h> | |
11 | #include <linux/types.h> | |
12 | #include <linux/sysctl.h> | |
13 | #include <linux/string.h> | |
14 | #include <linux/socket.h> | |
15 | #include <linux/errno.h> | |
16 | #include <linux/fcntl.h> | |
17 | #include <linux/in.h> | |
18 | #include <linux/if_ether.h> | |
5a0e3ad6 | 19 | #include <linux/slab.h> |
1da177e4 | 20 | |
1da177e4 LT |
21 | #include <asm/io.h> |
22 | ||
23 | #include <linux/inet.h> | |
24 | #include <linux/netdevice.h> | |
25 | #include <linux/etherdevice.h> | |
26 | #include <linux/if_arp.h> | |
27 | #include <linux/skbuff.h> | |
28 | ||
29 | #include <net/ip.h> | |
30 | #include <net/arp.h> | |
31 | ||
32 | #include <net/ax25.h> | |
33 | #include <net/rose.h> | |
34 | ||
3b04ddde SH |
35 | static int rose_header(struct sk_buff *skb, struct net_device *dev, |
36 | unsigned short type, | |
95c96174 | 37 | const void *daddr, const void *saddr, unsigned int len) |
1da177e4 LT |
38 | { |
39 | unsigned char *buff = skb_push(skb, ROSE_MIN_LEN + 2); | |
40 | ||
b753af31 EB |
41 | if (daddr) |
42 | memcpy(buff + 7, daddr, dev->addr_len); | |
43 | ||
1da177e4 LT |
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 | ||
1da177e4 LT |
56 | static int rose_set_mac_address(struct net_device *dev, void *addr) |
57 | { | |
58 | struct sockaddr *sa = addr; | |
a159aaa3 | 59 | int err; |
1da177e4 | 60 | |
81213b5e | 61 | if (!memcmp(dev->dev_addr, sa->sa_data, dev->addr_len)) |
a159aaa3 | 62 | return 0; |
1da177e4 | 63 | |
a159aaa3 | 64 | if (dev->flags & IFF_UP) { |
81213b5e | 65 | err = rose_add_loopback_node((rose_address *)sa->sa_data); |
a159aaa3 RB |
66 | if (err) |
67 | return err; | |
68 | ||
69 | rose_del_loopback_node((rose_address *)dev->dev_addr); | |
70 | } | |
1da177e4 | 71 | |
a159aaa3 | 72 | memcpy(dev->dev_addr, sa->sa_data, dev->addr_len); |
1da177e4 LT |
73 | |
74 | return 0; | |
75 | } | |
76 | ||
77 | static int rose_open(struct net_device *dev) | |
78 | { | |
a159aaa3 RB |
79 | int err; |
80 | ||
81 | err = rose_add_loopback_node((rose_address *)dev->dev_addr); | |
82 | if (err) | |
83 | return err; | |
84 | ||
1da177e4 | 85 | netif_start_queue(dev); |
a159aaa3 | 86 | |
1da177e4 LT |
87 | return 0; |
88 | } | |
89 | ||
90 | static int rose_close(struct net_device *dev) | |
91 | { | |
92 | netif_stop_queue(dev); | |
93 | rose_del_loopback_node((rose_address *)dev->dev_addr); | |
94 | return 0; | |
95 | } | |
96 | ||
36e4d64a | 97 | static netdev_tx_t rose_xmit(struct sk_buff *skb, struct net_device *dev) |
1da177e4 | 98 | { |
d289d120 | 99 | struct net_device_stats *stats = &dev->stats; |
03ec2ac0 | 100 | unsigned int len = skb->len; |
1da177e4 LT |
101 | |
102 | if (!netif_running(dev)) { | |
103 | printk(KERN_ERR "ROSE: rose_xmit - called when iface is down\n"); | |
5b548140 | 104 | return NETDEV_TX_BUSY; |
1da177e4 | 105 | } |
03ec2ac0 EB |
106 | |
107 | if (!rose_route_frame(skb, NULL)) { | |
108 | dev_kfree_skb(skb); | |
109 | stats->tx_errors++; | |
110 | return NETDEV_TX_OK; | |
111 | } | |
112 | ||
113 | stats->tx_packets++; | |
114 | stats->tx_bytes += len; | |
6ed10654 | 115 | return NETDEV_TX_OK; |
1da177e4 LT |
116 | } |
117 | ||
3b04ddde SH |
118 | static const struct header_ops rose_header_ops = { |
119 | .create = rose_header, | |
3b04ddde SH |
120 | }; |
121 | ||
3170c656 SH |
122 | static const struct net_device_ops rose_netdev_ops = { |
123 | .ndo_open = rose_open, | |
124 | .ndo_stop = rose_close, | |
125 | .ndo_start_xmit = rose_xmit, | |
126 | .ndo_set_mac_address = rose_set_mac_address, | |
127 | }; | |
128 | ||
1da177e4 LT |
129 | void rose_setup(struct net_device *dev) |
130 | { | |
1da177e4 | 131 | dev->mtu = ROSE_MAX_PACKET_SIZE - 2; |
3170c656 | 132 | dev->netdev_ops = &rose_netdev_ops; |
1da177e4 | 133 | |
3b04ddde | 134 | dev->header_ops = &rose_header_ops; |
1da177e4 LT |
135 | dev->hard_header_len = AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN; |
136 | dev->addr_len = ROSE_ADDR_LEN; | |
137 | dev->type = ARPHRD_ROSE; | |
1da177e4 LT |
138 | |
139 | /* New-style flags. */ | |
d2ce4bc3 | 140 | dev->flags = IFF_NOARP; |
1da177e4 | 141 | } |