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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 | */ |
9 | #include <linux/errno.h> |
10 | #include <linux/types.h> |
11 | #include <linux/socket.h> |
12 | #include <linux/slab.h> |
13 | #include <linux/in.h> |
14 | #include <linux/kernel.h> |
15 | #include <linux/timer.h> |
16 | #include <linux/string.h> |
17 | #include <linux/sockios.h> |
18 | #include <linux/net.h> |
19 | #include <linux/spinlock.h> |
20 | #include <net/ax25.h> |
21 | #include <linux/inet.h> |
22 | #include <linux/netdevice.h> |
23 | #include <linux/if_arp.h> |
24 | #include <linux/skbuff.h> |
25 | #include <net/sock.h> |
26 | #include <asm/uaccess.h> |
27 | #include <asm/system.h> |
28 | #include <linux/fcntl.h> |
29 | #include <linux/mm.h> |
30 | #include <linux/interrupt.h> |
31 | #include <linux/init.h> |
32 | |
33 | ax25_dev *ax25_dev_list; |
34 | DEFINE_SPINLOCK(ax25_dev_lock); |
35 | |
36 | ax25_dev *ax25_addr_ax25dev(ax25_address *addr) |
37 | { |
38 | ax25_dev *ax25_dev, *res = NULL; |
39 | |
40 | spin_lock_bh(&ax25_dev_lock); |
41 | for (ax25_dev = ax25_dev_list; ax25_dev != NULL; ax25_dev = ax25_dev->next) |
42 | if (ax25cmp(addr, (ax25_address *)ax25_dev->dev->dev_addr) == 0) { |
43 | res = ax25_dev; |
44 | } |
45 | spin_unlock_bh(&ax25_dev_lock); |
46 | |
47 | return res; |
48 | } |
49 | |
50 | /* |
51 | * This is called when an interface is brought up. These are |
52 | * reasonable defaults. |
53 | */ |
54 | void ax25_dev_device_up(struct net_device *dev) |
55 | { |
56 | ax25_dev *ax25_dev; |
57 | |
58 | if ((ax25_dev = kzalloc(sizeof(*ax25_dev), GFP_ATOMIC)) == NULL) { |
59 | printk(KERN_ERR "AX.25: ax25_dev_device_up - out of memory\n"); |
60 | return; |
61 | } |
62 | |
63 | ax25_unregister_sysctl(); |
64 | |
65 | dev->ax25_ptr = ax25_dev; |
66 | ax25_dev->dev = dev; |
67 | dev_hold(dev); |
68 | ax25_dev->forward = NULL; |
69 | |
70 | ax25_dev->values[AX25_VALUES_IPDEFMODE] = AX25_DEF_IPDEFMODE; |
71 | ax25_dev->values[AX25_VALUES_AXDEFMODE] = AX25_DEF_AXDEFMODE; |
72 | ax25_dev->values[AX25_VALUES_BACKOFF] = AX25_DEF_BACKOFF; |
73 | ax25_dev->values[AX25_VALUES_CONMODE] = AX25_DEF_CONMODE; |
74 | ax25_dev->values[AX25_VALUES_WINDOW] = AX25_DEF_WINDOW; |
75 | ax25_dev->values[AX25_VALUES_EWINDOW] = AX25_DEF_EWINDOW; |
76 | ax25_dev->values[AX25_VALUES_T1] = AX25_DEF_T1; |
77 | ax25_dev->values[AX25_VALUES_T2] = AX25_DEF_T2; |
78 | ax25_dev->values[AX25_VALUES_T3] = AX25_DEF_T3; |
79 | ax25_dev->values[AX25_VALUES_IDLE] = AX25_DEF_IDLE; |
80 | ax25_dev->values[AX25_VALUES_N2] = AX25_DEF_N2; |
81 | ax25_dev->values[AX25_VALUES_PACLEN] = AX25_DEF_PACLEN; |
82 | ax25_dev->values[AX25_VALUES_PROTOCOL] = AX25_DEF_PROTOCOL; |
83 | ax25_dev->values[AX25_VALUES_DS_TIMEOUT]= AX25_DEF_DS_TIMEOUT; |
84 | |
85 | #if defined(CONFIG_AX25_DAMA_SLAVE) || defined(CONFIG_AX25_DAMA_MASTER) |
86 | ax25_ds_setup_timer(ax25_dev); |
87 | #endif |
88 | |
89 | spin_lock_bh(&ax25_dev_lock); |
90 | ax25_dev->next = ax25_dev_list; |
91 | ax25_dev_list = ax25_dev; |
92 | spin_unlock_bh(&ax25_dev_lock); |
93 | |
94 | ax25_register_sysctl(); |
95 | } |
96 | |
97 | void ax25_dev_device_down(struct net_device *dev) |
98 | { |
99 | ax25_dev *s, *ax25_dev; |
100 | |
101 | if ((ax25_dev = ax25_dev_ax25dev(dev)) == NULL) |
102 | return; |
103 | |
104 | ax25_unregister_sysctl(); |
105 | |
106 | spin_lock_bh(&ax25_dev_lock); |
107 | |
108 | #ifdef CONFIG_AX25_DAMA_SLAVE |
109 | ax25_ds_del_timer(ax25_dev); |
110 | #endif |
111 | |
112 | /* |
113 | * Remove any packet forwarding that points to this device. |
114 | */ |
115 | for (s = ax25_dev_list; s != NULL; s = s->next) |
116 | if (s->forward == dev) |
117 | s->forward = NULL; |
118 | |
119 | if ((s = ax25_dev_list) == ax25_dev) { |
120 | ax25_dev_list = s->next; |
121 | spin_unlock_bh(&ax25_dev_lock); |
122 | dev_put(dev); |
123 | kfree(ax25_dev); |
124 | ax25_register_sysctl(); |
125 | return; |
126 | } |
127 | |
128 | while (s != NULL && s->next != NULL) { |
129 | if (s->next == ax25_dev) { |
130 | s->next = ax25_dev->next; |
131 | spin_unlock_bh(&ax25_dev_lock); |
132 | dev_put(dev); |
133 | kfree(ax25_dev); |
134 | ax25_register_sysctl(); |
135 | return; |
136 | } |
137 | |
138 | s = s->next; |
139 | } |
140 | spin_unlock_bh(&ax25_dev_lock); |
141 | dev->ax25_ptr = NULL; |
142 | |
143 | ax25_register_sysctl(); |
144 | } |
145 | |
146 | int ax25_fwd_ioctl(unsigned int cmd, struct ax25_fwd_struct *fwd) |
147 | { |
148 | ax25_dev *ax25_dev, *fwd_dev; |
149 | |
150 | if ((ax25_dev = ax25_addr_ax25dev(&fwd->port_from)) == NULL) |
151 | return -EINVAL; |
152 | |
153 | switch (cmd) { |
154 | case SIOCAX25ADDFWD: |
155 | if ((fwd_dev = ax25_addr_ax25dev(&fwd->port_to)) == NULL) |
156 | return -EINVAL; |
157 | if (ax25_dev->forward != NULL) |
158 | return -EINVAL; |
159 | ax25_dev->forward = fwd_dev->dev; |
160 | break; |
161 | |
162 | case SIOCAX25DELFWD: |
163 | if (ax25_dev->forward == NULL) |
164 | return -EINVAL; |
165 | ax25_dev->forward = NULL; |
166 | break; |
167 | |
168 | default: |
169 | return -EINVAL; |
170 | } |
171 | |
172 | return 0; |
173 | } |
174 | |
175 | struct net_device *ax25_fwd_dev(struct net_device *dev) |
176 | { |
177 | ax25_dev *ax25_dev; |
178 | |
179 | if ((ax25_dev = ax25_dev_ax25dev(dev)) == NULL) |
180 | return dev; |
181 | |
182 | if (ax25_dev->forward == NULL) |
183 | return dev; |
184 | |
185 | return ax25_dev->forward; |
186 | } |
187 | |
188 | /* |
189 | * Free all memory associated with device structures. |
190 | */ |
191 | void __exit ax25_dev_free(void) |
192 | { |
193 | ax25_dev *s, *ax25_dev; |
194 | |
195 | spin_lock_bh(&ax25_dev_lock); |
196 | ax25_dev = ax25_dev_list; |
197 | while (ax25_dev != NULL) { |
198 | s = ax25_dev; |
199 | dev_put(ax25_dev->dev); |
200 | ax25_dev = ax25_dev->next; |
201 | kfree(s); |
202 | } |
203 | ax25_dev_list = NULL; |
204 | spin_unlock_bh(&ax25_dev_lock); |
205 | } |
206 |
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Tags:
od-2011-09-04
od-2011-09-18
v2.6.34-rc5
v2.6.34-rc6
v2.6.34-rc7
v3.9