This source file includes following definitions.
- ax25_addr_ax25dev
- ax25_dev_device_up
- ax25_dev_device_down
- ax25_fwd_ioctl
- ax25_fwd_dev
- ax25_dev_free
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5
6 #include <linux/errno.h>
7 #include <linux/types.h>
8 #include <linux/socket.h>
9 #include <linux/slab.h>
10 #include <linux/in.h>
11 #include <linux/kernel.h>
12 #include <linux/timer.h>
13 #include <linux/string.h>
14 #include <linux/sockios.h>
15 #include <linux/net.h>
16 #include <linux/spinlock.h>
17 #include <net/ax25.h>
18 #include <linux/inet.h>
19 #include <linux/netdevice.h>
20 #include <linux/if_arp.h>
21 #include <linux/skbuff.h>
22 #include <net/sock.h>
23 #include <linux/uaccess.h>
24 #include <linux/fcntl.h>
25 #include <linux/mm.h>
26 #include <linux/interrupt.h>
27 #include <linux/init.h>
28
29 ax25_dev *ax25_dev_list;
30 DEFINE_SPINLOCK(ax25_dev_lock);
31
32 ax25_dev *ax25_addr_ax25dev(ax25_address *addr)
33 {
34 ax25_dev *ax25_dev, *res = NULL;
35
36 spin_lock_bh(&ax25_dev_lock);
37 for (ax25_dev = ax25_dev_list; ax25_dev != NULL; ax25_dev = ax25_dev->next)
38 if (ax25cmp(addr, (ax25_address *)ax25_dev->dev->dev_addr) == 0) {
39 res = ax25_dev;
40 }
41 spin_unlock_bh(&ax25_dev_lock);
42
43 return res;
44 }
45
46
47
48
49
50 void ax25_dev_device_up(struct net_device *dev)
51 {
52 ax25_dev *ax25_dev;
53
54 if ((ax25_dev = kzalloc(sizeof(*ax25_dev), GFP_ATOMIC)) == NULL) {
55 printk(KERN_ERR "AX.25: ax25_dev_device_up - out of memory\n");
56 return;
57 }
58
59 dev->ax25_ptr = ax25_dev;
60 ax25_dev->dev = dev;
61 dev_hold(dev);
62 ax25_dev->forward = NULL;
63
64 ax25_dev->values[AX25_VALUES_IPDEFMODE] = AX25_DEF_IPDEFMODE;
65 ax25_dev->values[AX25_VALUES_AXDEFMODE] = AX25_DEF_AXDEFMODE;
66 ax25_dev->values[AX25_VALUES_BACKOFF] = AX25_DEF_BACKOFF;
67 ax25_dev->values[AX25_VALUES_CONMODE] = AX25_DEF_CONMODE;
68 ax25_dev->values[AX25_VALUES_WINDOW] = AX25_DEF_WINDOW;
69 ax25_dev->values[AX25_VALUES_EWINDOW] = AX25_DEF_EWINDOW;
70 ax25_dev->values[AX25_VALUES_T1] = AX25_DEF_T1;
71 ax25_dev->values[AX25_VALUES_T2] = AX25_DEF_T2;
72 ax25_dev->values[AX25_VALUES_T3] = AX25_DEF_T3;
73 ax25_dev->values[AX25_VALUES_IDLE] = AX25_DEF_IDLE;
74 ax25_dev->values[AX25_VALUES_N2] = AX25_DEF_N2;
75 ax25_dev->values[AX25_VALUES_PACLEN] = AX25_DEF_PACLEN;
76 ax25_dev->values[AX25_VALUES_PROTOCOL] = AX25_DEF_PROTOCOL;
77 ax25_dev->values[AX25_VALUES_DS_TIMEOUT]= AX25_DEF_DS_TIMEOUT;
78
79 #if defined(CONFIG_AX25_DAMA_SLAVE) || defined(CONFIG_AX25_DAMA_MASTER)
80 ax25_ds_setup_timer(ax25_dev);
81 #endif
82
83 spin_lock_bh(&ax25_dev_lock);
84 ax25_dev->next = ax25_dev_list;
85 ax25_dev_list = ax25_dev;
86 spin_unlock_bh(&ax25_dev_lock);
87
88 ax25_register_dev_sysctl(ax25_dev);
89 }
90
91 void ax25_dev_device_down(struct net_device *dev)
92 {
93 ax25_dev *s, *ax25_dev;
94
95 if ((ax25_dev = ax25_dev_ax25dev(dev)) == NULL)
96 return;
97
98 ax25_unregister_dev_sysctl(ax25_dev);
99
100 spin_lock_bh(&ax25_dev_lock);
101
102 #ifdef CONFIG_AX25_DAMA_SLAVE
103 ax25_ds_del_timer(ax25_dev);
104 #endif
105
106
107
108
109 for (s = ax25_dev_list; s != NULL; s = s->next)
110 if (s->forward == dev)
111 s->forward = NULL;
112
113 if ((s = ax25_dev_list) == ax25_dev) {
114 ax25_dev_list = s->next;
115 spin_unlock_bh(&ax25_dev_lock);
116 dev->ax25_ptr = NULL;
117 dev_put(dev);
118 kfree(ax25_dev);
119 return;
120 }
121
122 while (s != NULL && s->next != NULL) {
123 if (s->next == ax25_dev) {
124 s->next = ax25_dev->next;
125 spin_unlock_bh(&ax25_dev_lock);
126 dev->ax25_ptr = NULL;
127 dev_put(dev);
128 kfree(ax25_dev);
129 return;
130 }
131
132 s = s->next;
133 }
134 spin_unlock_bh(&ax25_dev_lock);
135 dev->ax25_ptr = NULL;
136 }
137
138 int ax25_fwd_ioctl(unsigned int cmd, struct ax25_fwd_struct *fwd)
139 {
140 ax25_dev *ax25_dev, *fwd_dev;
141
142 if ((ax25_dev = ax25_addr_ax25dev(&fwd->port_from)) == NULL)
143 return -EINVAL;
144
145 switch (cmd) {
146 case SIOCAX25ADDFWD:
147 if ((fwd_dev = ax25_addr_ax25dev(&fwd->port_to)) == NULL)
148 return -EINVAL;
149 if (ax25_dev->forward != NULL)
150 return -EINVAL;
151 ax25_dev->forward = fwd_dev->dev;
152 break;
153
154 case SIOCAX25DELFWD:
155 if (ax25_dev->forward == NULL)
156 return -EINVAL;
157 ax25_dev->forward = NULL;
158 break;
159
160 default:
161 return -EINVAL;
162 }
163
164 return 0;
165 }
166
167 struct net_device *ax25_fwd_dev(struct net_device *dev)
168 {
169 ax25_dev *ax25_dev;
170
171 if ((ax25_dev = ax25_dev_ax25dev(dev)) == NULL)
172 return dev;
173
174 if (ax25_dev->forward == NULL)
175 return dev;
176
177 return ax25_dev->forward;
178 }
179
180
181
182
183 void __exit ax25_dev_free(void)
184 {
185 ax25_dev *s, *ax25_dev;
186
187 spin_lock_bh(&ax25_dev_lock);
188 ax25_dev = ax25_dev_list;
189 while (ax25_dev != NULL) {
190 s = ax25_dev;
191 dev_put(ax25_dev->dev);
192 ax25_dev = ax25_dev->next;
193 kfree(s);
194 }
195 ax25_dev_list = NULL;
196 spin_unlock_bh(&ax25_dev_lock);
197 }