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1 | #ifndef __LINUX_ATALK_H__ |
2 | #define __LINUX_ATALK_H__ |
3 | |
4 | #include <linux/types.h> |
5 | #include <asm/byteorder.h> |
6 | |
7 | /* |
8 | * AppleTalk networking structures |
9 | * |
10 | * The following are directly referenced from the University Of Michigan |
11 | * netatalk for compatibility reasons. |
12 | */ |
13 | #define ATPORT_FIRST 1 |
14 | #define ATPORT_RESERVED 128 |
15 | #define ATPORT_LAST 254 /* 254 is only legal on localtalk */ |
16 | #define ATADDR_ANYNET (__u16)0 |
17 | #define ATADDR_ANYNODE (__u8)0 |
18 | #define ATADDR_ANYPORT (__u8)0 |
19 | #define ATADDR_BCAST (__u8)255 |
20 | #define DDP_MAXSZ 587 |
21 | #define DDP_MAXHOPS 15 /* 4 bits of hop counter */ |
22 | |
23 | #define SIOCATALKDIFADDR (SIOCPROTOPRIVATE + 0) |
24 | |
25 | struct atalk_addr { |
26 | __be16 s_net; |
27 | __u8 s_node; |
28 | }; |
29 | |
30 | struct sockaddr_at { |
31 | sa_family_t sat_family; |
32 | __u8 sat_port; |
33 | struct atalk_addr sat_addr; |
34 | char sat_zero[8]; |
35 | }; |
36 | |
37 | struct atalk_netrange { |
38 | __u8 nr_phase; |
39 | __be16 nr_firstnet; |
40 | __be16 nr_lastnet; |
41 | }; |
42 | |
43 | #ifdef __KERNEL__ |
44 | |
45 | #include <net/sock.h> |
46 | |
47 | struct atalk_route { |
48 | struct net_device *dev; |
49 | struct atalk_addr target; |
50 | struct atalk_addr gateway; |
51 | int flags; |
52 | struct atalk_route *next; |
53 | }; |
54 | |
55 | /** |
56 | * struct atalk_iface - AppleTalk Interface |
57 | * @dev - Network device associated with this interface |
58 | * @address - Our address |
59 | * @status - What are we doing? |
60 | * @nets - Associated direct netrange |
61 | * @next - next element in the list of interfaces |
62 | */ |
63 | struct atalk_iface { |
64 | struct net_device *dev; |
65 | struct atalk_addr address; |
66 | int status; |
67 | #define ATIF_PROBE 1 /* Probing for an address */ |
68 | #define ATIF_PROBE_FAIL 2 /* Probe collided */ |
69 | struct atalk_netrange nets; |
70 | struct atalk_iface *next; |
71 | }; |
72 | |
73 | struct atalk_sock { |
74 | /* struct sock has to be the first member of atalk_sock */ |
75 | struct sock sk; |
76 | __be16 dest_net; |
77 | __be16 src_net; |
78 | unsigned char dest_node; |
79 | unsigned char src_node; |
80 | unsigned char dest_port; |
81 | unsigned char src_port; |
82 | }; |
83 | |
84 | static inline struct atalk_sock *at_sk(struct sock *sk) |
85 | { |
86 | return (struct atalk_sock *)sk; |
87 | } |
88 | |
89 | struct ddpehdr { |
90 | __be16 deh_len_hops; /* lower 10 bits are length, next 4 - hops */ |
91 | __be16 deh_sum; |
92 | __be16 deh_dnet; |
93 | __be16 deh_snet; |
94 | __u8 deh_dnode; |
95 | __u8 deh_snode; |
96 | __u8 deh_dport; |
97 | __u8 deh_sport; |
98 | /* And netatalk apps expect to stick the type in themselves */ |
99 | }; |
100 | |
101 | static __inline__ struct ddpehdr *ddp_hdr(struct sk_buff *skb) |
102 | { |
103 | return (struct ddpehdr *)skb_transport_header(skb); |
104 | } |
105 | |
106 | /* AppleTalk AARP headers */ |
107 | struct elapaarp { |
108 | __be16 hw_type; |
109 | #define AARP_HW_TYPE_ETHERNET 1 |
110 | #define AARP_HW_TYPE_TOKENRING 2 |
111 | __be16 pa_type; |
112 | __u8 hw_len; |
113 | __u8 pa_len; |
114 | #define AARP_PA_ALEN 4 |
115 | __be16 function; |
116 | #define AARP_REQUEST 1 |
117 | #define AARP_REPLY 2 |
118 | #define AARP_PROBE 3 |
119 | __u8 hw_src[ETH_ALEN]; |
120 | __u8 pa_src_zero; |
121 | __be16 pa_src_net; |
122 | __u8 pa_src_node; |
123 | __u8 hw_dst[ETH_ALEN]; |
124 | __u8 pa_dst_zero; |
125 | __be16 pa_dst_net; |
126 | __u8 pa_dst_node; |
127 | } __attribute__ ((packed)); |
128 | |
129 | static __inline__ struct elapaarp *aarp_hdr(struct sk_buff *skb) |
130 | { |
131 | return (struct elapaarp *)skb_transport_header(skb); |
132 | } |
133 | |
134 | /* Not specified - how long till we drop a resolved entry */ |
135 | #define AARP_EXPIRY_TIME (5 * 60 * HZ) |
136 | /* Size of hash table */ |
137 | #define AARP_HASH_SIZE 16 |
138 | /* Fast retransmission timer when resolving */ |
139 | #define AARP_TICK_TIME (HZ / 5) |
140 | /* Send 10 requests then give up (2 seconds) */ |
141 | #define AARP_RETRANSMIT_LIMIT 10 |
142 | /* |
143 | * Some value bigger than total retransmit time + a bit for last reply to |
144 | * appear and to stop continual requests |
145 | */ |
146 | #define AARP_RESOLVE_TIME (10 * HZ) |
147 | |
148 | extern struct datalink_proto *ddp_dl, *aarp_dl; |
149 | extern void aarp_proto_init(void); |
150 | |
151 | /* Inter module exports */ |
152 | |
153 | /* Give a device find its atif control structure */ |
154 | static inline struct atalk_iface *atalk_find_dev(struct net_device *dev) |
155 | { |
156 | return dev->atalk_ptr; |
157 | } |
158 | |
159 | extern struct atalk_addr *atalk_find_dev_addr(struct net_device *dev); |
160 | extern struct net_device *atrtr_get_dev(struct atalk_addr *sa); |
161 | extern int aarp_send_ddp(struct net_device *dev, |
162 | struct sk_buff *skb, |
163 | struct atalk_addr *sa, void *hwaddr); |
164 | extern void aarp_device_down(struct net_device *dev); |
165 | extern void aarp_probe_network(struct atalk_iface *atif); |
166 | extern int aarp_proxy_probe_network(struct atalk_iface *atif, |
167 | struct atalk_addr *sa); |
168 | extern void aarp_proxy_remove(struct net_device *dev, |
169 | struct atalk_addr *sa); |
170 | |
171 | extern void aarp_cleanup_module(void); |
172 | |
173 | extern struct hlist_head atalk_sockets; |
174 | extern rwlock_t atalk_sockets_lock; |
175 | |
176 | extern struct atalk_route *atalk_routes; |
177 | extern rwlock_t atalk_routes_lock; |
178 | |
179 | extern struct atalk_iface *atalk_interfaces; |
180 | extern rwlock_t atalk_interfaces_lock; |
181 | |
182 | extern struct atalk_route atrtr_default; |
183 | |
184 | extern const struct file_operations atalk_seq_arp_fops; |
185 | |
186 | extern int sysctl_aarp_expiry_time; |
187 | extern int sysctl_aarp_tick_time; |
188 | extern int sysctl_aarp_retransmit_limit; |
189 | extern int sysctl_aarp_resolve_time; |
190 | |
191 | #ifdef CONFIG_SYSCTL |
192 | extern void atalk_register_sysctl(void); |
193 | extern void atalk_unregister_sysctl(void); |
194 | #else |
195 | #define atalk_register_sysctl() do { } while(0) |
196 | #define atalk_unregister_sysctl() do { } while(0) |
197 | #endif |
198 | |
199 | #ifdef CONFIG_PROC_FS |
200 | extern int atalk_proc_init(void); |
201 | extern void atalk_proc_exit(void); |
202 | #else |
203 | #define atalk_proc_init() ({ 0; }) |
204 | #define atalk_proc_exit() do { } while(0) |
205 | #endif /* CONFIG_PROC_FS */ |
206 | |
207 | #endif /* __KERNEL__ */ |
208 | #endif /* __LINUX_ATALK_H__ */ |
209 |
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