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1 | #ifndef __LINUX_ATALK_H__ |
2 | #define __LINUX_ATALK_H__ |
3 | |
4 | |
5 | #include <net/sock.h> |
6 | #include <uapi/linux/atalk.h> |
7 | |
8 | struct atalk_route { |
9 | struct net_device *dev; |
10 | struct atalk_addr target; |
11 | struct atalk_addr gateway; |
12 | int flags; |
13 | struct atalk_route *next; |
14 | }; |
15 | |
16 | /** |
17 | * struct atalk_iface - AppleTalk Interface |
18 | * @dev - Network device associated with this interface |
19 | * @address - Our address |
20 | * @status - What are we doing? |
21 | * @nets - Associated direct netrange |
22 | * @next - next element in the list of interfaces |
23 | */ |
24 | struct atalk_iface { |
25 | struct net_device *dev; |
26 | struct atalk_addr address; |
27 | int status; |
28 | #define ATIF_PROBE 1 /* Probing for an address */ |
29 | #define ATIF_PROBE_FAIL 2 /* Probe collided */ |
30 | struct atalk_netrange nets; |
31 | struct atalk_iface *next; |
32 | }; |
33 | |
34 | struct atalk_sock { |
35 | /* struct sock has to be the first member of atalk_sock */ |
36 | struct sock sk; |
37 | __be16 dest_net; |
38 | __be16 src_net; |
39 | unsigned char dest_node; |
40 | unsigned char src_node; |
41 | unsigned char dest_port; |
42 | unsigned char src_port; |
43 | }; |
44 | |
45 | static inline struct atalk_sock *at_sk(struct sock *sk) |
46 | { |
47 | return (struct atalk_sock *)sk; |
48 | } |
49 | |
50 | struct ddpehdr { |
51 | __be16 deh_len_hops; /* lower 10 bits are length, next 4 - hops */ |
52 | __be16 deh_sum; |
53 | __be16 deh_dnet; |
54 | __be16 deh_snet; |
55 | __u8 deh_dnode; |
56 | __u8 deh_snode; |
57 | __u8 deh_dport; |
58 | __u8 deh_sport; |
59 | /* And netatalk apps expect to stick the type in themselves */ |
60 | }; |
61 | |
62 | static __inline__ struct ddpehdr *ddp_hdr(struct sk_buff *skb) |
63 | { |
64 | return (struct ddpehdr *)skb_transport_header(skb); |
65 | } |
66 | |
67 | /* AppleTalk AARP headers */ |
68 | struct elapaarp { |
69 | __be16 hw_type; |
70 | #define AARP_HW_TYPE_ETHERNET 1 |
71 | #define AARP_HW_TYPE_TOKENRING 2 |
72 | __be16 pa_type; |
73 | __u8 hw_len; |
74 | __u8 pa_len; |
75 | #define AARP_PA_ALEN 4 |
76 | __be16 function; |
77 | #define AARP_REQUEST 1 |
78 | #define AARP_REPLY 2 |
79 | #define AARP_PROBE 3 |
80 | __u8 hw_src[ETH_ALEN]; |
81 | __u8 pa_src_zero; |
82 | __be16 pa_src_net; |
83 | __u8 pa_src_node; |
84 | __u8 hw_dst[ETH_ALEN]; |
85 | __u8 pa_dst_zero; |
86 | __be16 pa_dst_net; |
87 | __u8 pa_dst_node; |
88 | } __attribute__ ((packed)); |
89 | |
90 | static __inline__ struct elapaarp *aarp_hdr(struct sk_buff *skb) |
91 | { |
92 | return (struct elapaarp *)skb_transport_header(skb); |
93 | } |
94 | |
95 | /* Not specified - how long till we drop a resolved entry */ |
96 | #define AARP_EXPIRY_TIME (5 * 60 * HZ) |
97 | /* Size of hash table */ |
98 | #define AARP_HASH_SIZE 16 |
99 | /* Fast retransmission timer when resolving */ |
100 | #define AARP_TICK_TIME (HZ / 5) |
101 | /* Send 10 requests then give up (2 seconds) */ |
102 | #define AARP_RETRANSMIT_LIMIT 10 |
103 | /* |
104 | * Some value bigger than total retransmit time + a bit for last reply to |
105 | * appear and to stop continual requests |
106 | */ |
107 | #define AARP_RESOLVE_TIME (10 * HZ) |
108 | |
109 | extern struct datalink_proto *ddp_dl, *aarp_dl; |
110 | extern void aarp_proto_init(void); |
111 | |
112 | /* Inter module exports */ |
113 | |
114 | /* Give a device find its atif control structure */ |
115 | static inline struct atalk_iface *atalk_find_dev(struct net_device *dev) |
116 | { |
117 | return dev->atalk_ptr; |
118 | } |
119 | |
120 | extern struct atalk_addr *atalk_find_dev_addr(struct net_device *dev); |
121 | extern struct net_device *atrtr_get_dev(struct atalk_addr *sa); |
122 | extern int aarp_send_ddp(struct net_device *dev, |
123 | struct sk_buff *skb, |
124 | struct atalk_addr *sa, void *hwaddr); |
125 | extern void aarp_device_down(struct net_device *dev); |
126 | extern void aarp_probe_network(struct atalk_iface *atif); |
127 | extern int aarp_proxy_probe_network(struct atalk_iface *atif, |
128 | struct atalk_addr *sa); |
129 | extern void aarp_proxy_remove(struct net_device *dev, |
130 | struct atalk_addr *sa); |
131 | |
132 | extern void aarp_cleanup_module(void); |
133 | |
134 | extern struct hlist_head atalk_sockets; |
135 | extern rwlock_t atalk_sockets_lock; |
136 | |
137 | extern struct atalk_route *atalk_routes; |
138 | extern rwlock_t atalk_routes_lock; |
139 | |
140 | extern struct atalk_iface *atalk_interfaces; |
141 | extern rwlock_t atalk_interfaces_lock; |
142 | |
143 | extern struct atalk_route atrtr_default; |
144 | |
145 | extern const struct file_operations atalk_seq_arp_fops; |
146 | |
147 | extern int sysctl_aarp_expiry_time; |
148 | extern int sysctl_aarp_tick_time; |
149 | extern int sysctl_aarp_retransmit_limit; |
150 | extern int sysctl_aarp_resolve_time; |
151 | |
152 | #ifdef CONFIG_SYSCTL |
153 | extern void atalk_register_sysctl(void); |
154 | extern void atalk_unregister_sysctl(void); |
155 | #else |
156 | #define atalk_register_sysctl() do { } while(0) |
157 | #define atalk_unregister_sysctl() do { } while(0) |
158 | #endif |
159 | |
160 | #ifdef CONFIG_PROC_FS |
161 | extern int atalk_proc_init(void); |
162 | extern void atalk_proc_exit(void); |
163 | #else |
164 | #define atalk_proc_init() ({ 0; }) |
165 | #define atalk_proc_exit() do { } while(0) |
166 | #endif /* CONFIG_PROC_FS */ |
167 | |
168 | #endif /* __LINUX_ATALK_H__ */ |
169 |
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