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1da177e4 LT |
1 | #ifndef __LINUX_ATALK_H__ |
2 | #define __LINUX_ATALK_H__ | |
3 | ||
4 | #include <net/sock.h> | |
5 | ||
6 | /* | |
7 | * AppleTalk networking structures | |
8 | * | |
9 | * The following are directly referenced from the University Of Michigan | |
10 | * netatalk for compatibility reasons. | |
11 | */ | |
12 | #define ATPORT_FIRST 1 | |
13 | #define ATPORT_RESERVED 128 | |
14 | #define ATPORT_LAST 254 /* 254 is only legal on localtalk */ | |
15 | #define ATADDR_ANYNET (__u16)0 | |
16 | #define ATADDR_ANYNODE (__u8)0 | |
17 | #define ATADDR_ANYPORT (__u8)0 | |
18 | #define ATADDR_BCAST (__u8)255 | |
19 | #define DDP_MAXSZ 587 | |
20 | #define DDP_MAXHOPS 15 /* 4 bits of hop counter */ | |
21 | ||
22 | #define SIOCATALKDIFADDR (SIOCPROTOPRIVATE + 0) | |
23 | ||
24 | struct atalk_addr { | |
25 | __u16 s_net; | |
26 | __u8 s_node; | |
27 | }; | |
28 | ||
29 | struct sockaddr_at { | |
30 | sa_family_t sat_family; | |
31 | __u8 sat_port; | |
32 | struct atalk_addr sat_addr; | |
33 | char sat_zero[8]; | |
34 | }; | |
35 | ||
36 | struct atalk_netrange { | |
37 | __u8 nr_phase; | |
38 | __u16 nr_firstnet; | |
39 | __u16 nr_lastnet; | |
40 | }; | |
41 | ||
42 | struct atalk_route { | |
43 | struct net_device *dev; | |
44 | struct atalk_addr target; | |
45 | struct atalk_addr gateway; | |
46 | int flags; | |
47 | struct atalk_route *next; | |
48 | }; | |
49 | ||
50 | /** | |
51 | * struct atalk_iface - AppleTalk Interface | |
52 | * @dev - Network device associated with this interface | |
53 | * @address - Our address | |
54 | * @status - What are we doing? | |
55 | * @nets - Associated direct netrange | |
56 | * @next - next element in the list of interfaces | |
57 | */ | |
58 | struct atalk_iface { | |
59 | struct net_device *dev; | |
60 | struct atalk_addr address; | |
61 | int status; | |
62 | #define ATIF_PROBE 1 /* Probing for an address */ | |
63 | #define ATIF_PROBE_FAIL 2 /* Probe collided */ | |
64 | struct atalk_netrange nets; | |
65 | struct atalk_iface *next; | |
66 | }; | |
67 | ||
68 | struct atalk_sock { | |
69 | /* struct sock has to be the first member of atalk_sock */ | |
70 | struct sock sk; | |
71 | unsigned short dest_net; | |
72 | unsigned short src_net; | |
73 | unsigned char dest_node; | |
74 | unsigned char src_node; | |
75 | unsigned char dest_port; | |
76 | unsigned char src_port; | |
77 | }; | |
78 | ||
79 | static inline struct atalk_sock *at_sk(struct sock *sk) | |
80 | { | |
81 | return (struct atalk_sock *)sk; | |
82 | } | |
83 | ||
84 | #ifdef __KERNEL__ | |
85 | ||
86 | #include <asm/byteorder.h> | |
87 | ||
88 | struct ddpehdr { | |
89 | #ifdef __LITTLE_ENDIAN_BITFIELD | |
90 | __u16 deh_len:10, | |
91 | deh_hops:4, | |
92 | deh_pad:2; | |
93 | #else | |
94 | __u16 deh_pad:2, | |
95 | deh_hops:4, | |
96 | deh_len:10; | |
97 | #endif | |
98 | __u16 deh_sum; | |
99 | __u16 deh_dnet; | |
100 | __u16 deh_snet; | |
101 | __u8 deh_dnode; | |
102 | __u8 deh_snode; | |
103 | __u8 deh_dport; | |
104 | __u8 deh_sport; | |
105 | /* And netatalk apps expect to stick the type in themselves */ | |
106 | }; | |
107 | ||
108 | static __inline__ struct ddpehdr *ddp_hdr(struct sk_buff *skb) | |
109 | { | |
110 | return (struct ddpehdr *)skb->h.raw; | |
111 | } | |
112 | ||
113 | /* | |
114 | * Don't drop the struct into the struct above. You'll get some | |
115 | * surprise padding. | |
116 | */ | |
117 | struct ddpebits { | |
118 | #ifdef __LITTLE_ENDIAN_BITFIELD | |
119 | __u16 deh_len:10, | |
120 | deh_hops:4, | |
121 | deh_pad:2; | |
122 | #else | |
123 | __u16 deh_pad:2, | |
124 | deh_hops:4, | |
125 | deh_len:10; | |
126 | #endif | |
127 | }; | |
128 | ||
129 | /* Short form header */ | |
130 | struct ddpshdr { | |
131 | #ifdef __LITTLE_ENDIAN_BITFIELD | |
132 | __u16 dsh_len:10, | |
133 | dsh_pad:6; | |
134 | #else | |
135 | __u16 dsh_pad:6, | |
136 | dsh_len:10; | |
137 | #endif | |
138 | __u8 dsh_dport; | |
139 | __u8 dsh_sport; | |
140 | /* And netatalk apps expect to stick the type in themselves */ | |
141 | }; | |
142 | ||
143 | /* AppleTalk AARP headers */ | |
144 | struct elapaarp { | |
145 | __u16 hw_type; | |
146 | #define AARP_HW_TYPE_ETHERNET 1 | |
147 | #define AARP_HW_TYPE_TOKENRING 2 | |
148 | __u16 pa_type; | |
149 | __u8 hw_len; | |
150 | __u8 pa_len; | |
151 | #define AARP_PA_ALEN 4 | |
152 | __u16 function; | |
153 | #define AARP_REQUEST 1 | |
154 | #define AARP_REPLY 2 | |
155 | #define AARP_PROBE 3 | |
156 | __u8 hw_src[ETH_ALEN] __attribute__ ((packed)); | |
157 | __u8 pa_src_zero __attribute__ ((packed)); | |
158 | __u16 pa_src_net __attribute__ ((packed)); | |
159 | __u8 pa_src_node __attribute__ ((packed)); | |
160 | __u8 hw_dst[ETH_ALEN] __attribute__ ((packed)); | |
161 | __u8 pa_dst_zero __attribute__ ((packed)); | |
162 | __u16 pa_dst_net __attribute__ ((packed)); | |
163 | __u8 pa_dst_node __attribute__ ((packed)); | |
164 | }; | |
165 | ||
166 | static __inline__ struct elapaarp *aarp_hdr(struct sk_buff *skb) | |
167 | { | |
168 | return (struct elapaarp *)skb->h.raw; | |
169 | } | |
170 | ||
171 | /* Not specified - how long till we drop a resolved entry */ | |
172 | #define AARP_EXPIRY_TIME (5 * 60 * HZ) | |
173 | /* Size of hash table */ | |
174 | #define AARP_HASH_SIZE 16 | |
175 | /* Fast retransmission timer when resolving */ | |
176 | #define AARP_TICK_TIME (HZ / 5) | |
177 | /* Send 10 requests then give up (2 seconds) */ | |
178 | #define AARP_RETRANSMIT_LIMIT 10 | |
179 | /* | |
180 | * Some value bigger than total retransmit time + a bit for last reply to | |
181 | * appear and to stop continual requests | |
182 | */ | |
183 | #define AARP_RESOLVE_TIME (10 * HZ) | |
184 | ||
185 | extern struct datalink_proto *ddp_dl, *aarp_dl; | |
186 | extern void aarp_proto_init(void); | |
187 | ||
188 | /* Inter module exports */ | |
189 | ||
190 | /* Give a device find its atif control structure */ | |
191 | static inline struct atalk_iface *atalk_find_dev(struct net_device *dev) | |
192 | { | |
193 | return dev->atalk_ptr; | |
194 | } | |
195 | ||
196 | extern struct atalk_addr *atalk_find_dev_addr(struct net_device *dev); | |
197 | extern struct net_device *atrtr_get_dev(struct atalk_addr *sa); | |
198 | extern int aarp_send_ddp(struct net_device *dev, | |
199 | struct sk_buff *skb, | |
200 | struct atalk_addr *sa, void *hwaddr); | |
201 | extern void aarp_device_down(struct net_device *dev); | |
202 | extern void aarp_probe_network(struct atalk_iface *atif); | |
203 | extern int aarp_proxy_probe_network(struct atalk_iface *atif, | |
204 | struct atalk_addr *sa); | |
205 | extern void aarp_proxy_remove(struct net_device *dev, | |
206 | struct atalk_addr *sa); | |
207 | ||
208 | extern void aarp_cleanup_module(void); | |
209 | ||
210 | extern struct hlist_head atalk_sockets; | |
211 | extern rwlock_t atalk_sockets_lock; | |
212 | ||
213 | extern struct atalk_route *atalk_routes; | |
214 | extern rwlock_t atalk_routes_lock; | |
215 | ||
216 | extern struct atalk_iface *atalk_interfaces; | |
217 | extern rwlock_t atalk_interfaces_lock; | |
218 | ||
219 | extern struct atalk_route atrtr_default; | |
220 | ||
221 | extern struct file_operations atalk_seq_arp_fops; | |
222 | ||
223 | extern int sysctl_aarp_expiry_time; | |
224 | extern int sysctl_aarp_tick_time; | |
225 | extern int sysctl_aarp_retransmit_limit; | |
226 | extern int sysctl_aarp_resolve_time; | |
227 | ||
228 | #ifdef CONFIG_SYSCTL | |
229 | extern void atalk_register_sysctl(void); | |
230 | extern void atalk_unregister_sysctl(void); | |
231 | #else | |
232 | #define atalk_register_sysctl() do { } while(0) | |
233 | #define atalk_unregister_sysctl() do { } while(0) | |
234 | #endif | |
235 | ||
236 | #ifdef CONFIG_PROC_FS | |
237 | extern int atalk_proc_init(void); | |
238 | extern void atalk_proc_exit(void); | |
239 | #else | |
240 | #define atalk_proc_init() ({ 0; }) | |
241 | #define atalk_proc_exit() do { } while(0) | |
242 | #endif /* CONFIG_PROC_FS */ | |
243 | ||
244 | #endif /* __KERNEL__ */ | |
245 | #endif /* __LINUX_ATALK_H__ */ |