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.
7 * Copyright (C) Jonathan Naylor G4KLX (g4klx@g4klx.demon.co.uk)
9 #include <linux/errno.h>
10 #include <linux/types.h>
11 #include <linux/socket.h>
12 #include <linux/slab.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>
21 #include <linux/inet.h>
22 #include <linux/netdevice.h>
23 #include <linux/if_arp.h>
24 #include <linux/skbuff.h>
26 #include <asm/uaccess.h>
27 #include <linux/fcntl.h>
29 #include <linux/interrupt.h>
30 #include <linux/init.h>
32 ax25_dev
*ax25_dev_list
;
33 DEFINE_SPINLOCK(ax25_dev_lock
);
35 ax25_dev
*ax25_addr_ax25dev(ax25_address
*addr
)
37 ax25_dev
*ax25_dev
, *res
= NULL
;
39 spin_lock_bh(&ax25_dev_lock
);
40 for (ax25_dev
= ax25_dev_list
; ax25_dev
!= NULL
; ax25_dev
= ax25_dev
->next
)
41 if (ax25cmp(addr
, (ax25_address
*)ax25_dev
->dev
->dev_addr
) == 0) {
44 spin_unlock_bh(&ax25_dev_lock
);
50 * This is called when an interface is brought up. These are
51 * reasonable defaults.
53 void ax25_dev_device_up(struct net_device
*dev
)
57 if ((ax25_dev
= kzalloc(sizeof(*ax25_dev
), GFP_ATOMIC
)) == NULL
) {
58 printk(KERN_ERR
"AX.25: ax25_dev_device_up - out of memory\n");
62 dev
->ax25_ptr
= ax25_dev
;
65 ax25_dev
->forward
= NULL
;
67 ax25_dev
->values
[AX25_VALUES_IPDEFMODE
] = AX25_DEF_IPDEFMODE
;
68 ax25_dev
->values
[AX25_VALUES_AXDEFMODE
] = AX25_DEF_AXDEFMODE
;
69 ax25_dev
->values
[AX25_VALUES_BACKOFF
] = AX25_DEF_BACKOFF
;
70 ax25_dev
->values
[AX25_VALUES_CONMODE
] = AX25_DEF_CONMODE
;
71 ax25_dev
->values
[AX25_VALUES_WINDOW
] = AX25_DEF_WINDOW
;
72 ax25_dev
->values
[AX25_VALUES_EWINDOW
] = AX25_DEF_EWINDOW
;
73 ax25_dev
->values
[AX25_VALUES_T1
] = AX25_DEF_T1
;
74 ax25_dev
->values
[AX25_VALUES_T2
] = AX25_DEF_T2
;
75 ax25_dev
->values
[AX25_VALUES_T3
] = AX25_DEF_T3
;
76 ax25_dev
->values
[AX25_VALUES_IDLE
] = AX25_DEF_IDLE
;
77 ax25_dev
->values
[AX25_VALUES_N2
] = AX25_DEF_N2
;
78 ax25_dev
->values
[AX25_VALUES_PACLEN
] = AX25_DEF_PACLEN
;
79 ax25_dev
->values
[AX25_VALUES_PROTOCOL
] = AX25_DEF_PROTOCOL
;
80 ax25_dev
->values
[AX25_VALUES_DS_TIMEOUT
]= AX25_DEF_DS_TIMEOUT
;
82 #if defined(CONFIG_AX25_DAMA_SLAVE) || defined(CONFIG_AX25_DAMA_MASTER)
83 ax25_ds_setup_timer(ax25_dev
);
86 spin_lock_bh(&ax25_dev_lock
);
87 ax25_dev
->next
= ax25_dev_list
;
88 ax25_dev_list
= ax25_dev
;
89 spin_unlock_bh(&ax25_dev_lock
);
91 ax25_register_dev_sysctl(ax25_dev
);
94 void ax25_dev_device_down(struct net_device
*dev
)
96 ax25_dev
*s
, *ax25_dev
;
98 if ((ax25_dev
= ax25_dev_ax25dev(dev
)) == NULL
)
101 ax25_unregister_dev_sysctl(ax25_dev
);
103 spin_lock_bh(&ax25_dev_lock
);
105 #ifdef CONFIG_AX25_DAMA_SLAVE
106 ax25_ds_del_timer(ax25_dev
);
110 * Remove any packet forwarding that points to this device.
112 for (s
= ax25_dev_list
; s
!= NULL
; s
= s
->next
)
113 if (s
->forward
== dev
)
116 if ((s
= ax25_dev_list
) == ax25_dev
) {
117 ax25_dev_list
= s
->next
;
118 spin_unlock_bh(&ax25_dev_lock
);
124 while (s
!= NULL
&& s
->next
!= NULL
) {
125 if (s
->next
== ax25_dev
) {
126 s
->next
= ax25_dev
->next
;
127 spin_unlock_bh(&ax25_dev_lock
);
135 spin_unlock_bh(&ax25_dev_lock
);
136 dev
->ax25_ptr
= NULL
;
139 int ax25_fwd_ioctl(unsigned int cmd
, struct ax25_fwd_struct
*fwd
)
141 ax25_dev
*ax25_dev
, *fwd_dev
;
143 if ((ax25_dev
= ax25_addr_ax25dev(&fwd
->port_from
)) == NULL
)
148 if ((fwd_dev
= ax25_addr_ax25dev(&fwd
->port_to
)) == NULL
)
150 if (ax25_dev
->forward
!= NULL
)
152 ax25_dev
->forward
= fwd_dev
->dev
;
156 if (ax25_dev
->forward
== NULL
)
158 ax25_dev
->forward
= NULL
;
168 struct net_device
*ax25_fwd_dev(struct net_device
*dev
)
172 if ((ax25_dev
= ax25_dev_ax25dev(dev
)) == NULL
)
175 if (ax25_dev
->forward
== NULL
)
178 return ax25_dev
->forward
;
182 * Free all memory associated with device structures.
184 void __exit
ax25_dev_free(void)
186 ax25_dev
*s
, *ax25_dev
;
188 spin_lock_bh(&ax25_dev_lock
);
189 ax25_dev
= ax25_dev_list
;
190 while (ax25_dev
!= NULL
) {
192 dev_put(ax25_dev
->dev
);
193 ax25_dev
= ax25_dev
->next
;
196 ax25_dev_list
= NULL
;
197 spin_unlock_bh(&ax25_dev_lock
);
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