1 #ifndef __LINUX_ATALK_H__
2 #define __LINUX_ATALK_H__
3
4 #include <asm/byteorder.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 __be16 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 __be16 nr_firstnet;
39 __be16 nr_lastnet;
40 };
41
42 #ifdef __KERNEL__
43
44 #include <net/sock.h>
45
46 struct atalk_route {
47 struct net_device *dev;
48 struct atalk_addr target;
49 struct atalk_addr gateway;
50 int flags;
51 struct atalk_route *next;
52 };
53
54 /**
55 * struct atalk_iface - AppleTalk Interface
56 * @dev - Network device associated with this interface
57 * @address - Our address
58 * @status - What are we doing?
59 * @nets - Associated direct netrange
60 * @next - next element in the list of interfaces
61 */
62 struct atalk_iface {
63 struct net_device *dev;
64 struct atalk_addr address;
65 int status;
66 #define ATIF_PROBE 1 /* Probing for an address */
67 #define ATIF_PROBE_FAIL 2 /* Probe collided */
68 struct atalk_netrange nets;
69 struct atalk_iface *next;
70 };
71
72 struct atalk_sock {
73 /* struct sock has to be the first member of atalk_sock */
74 struct sock sk;
75 __be16 dest_net;
76 __be16 src_net;
77 unsigned char dest_node;
78 unsigned char src_node;
79 unsigned char dest_port;
80 unsigned char src_port;
81 };
82
83 static inline struct atalk_sock *at_sk(struct sock *sk)
84 {
85 return (struct atalk_sock *)sk;
86 }
87
88 #include <asm/byteorder.h>
89
90 struct ddpehdr {
91 #ifdef __LITTLE_ENDIAN_BITFIELD
92 __u16 deh_len:10,
93 deh_hops:4,
94 deh_pad:2;
95 #else
96 __u16 deh_pad:2,
97 deh_hops:4,
98 deh_len:10;
99 #endif
100 __be16 deh_sum;
101 __be16 deh_dnet;
102 __be16 deh_snet;
103 __u8 deh_dnode;
104 __u8 deh_snode;
105 __u8 deh_dport;
106 __u8 deh_sport;
107 /* And netatalk apps expect to stick the type in themselves */
108 };
109
110 static __inline__ struct ddpehdr *ddp_hdr(struct sk_buff *skb)
111 {
112 return (struct ddpehdr *)skb->h.raw;
113 }
114
115 /*
116 * Don't drop the struct into the struct above. You'll get some
117 * surprise padding.
118 */
119 struct ddpebits {
120 #ifdef __LITTLE_ENDIAN_BITFIELD
121 __u16 deh_len:10,
122 deh_hops:4,
123 deh_pad:2;
124 #else
125 __u16 deh_pad:2,
126 deh_hops:4,
127 deh_len:10;
128 #endif
129 };
130
131 /* Short form header */
132 struct ddpshdr {
133 #ifdef __LITTLE_ENDIAN_BITFIELD
134 __u16 dsh_len:10,
135 dsh_pad:6;
136 #else
137 __u16 dsh_pad:6,
138 dsh_len:10;
139 #endif
140 __u8 dsh_dport;
141 __u8 dsh_sport;
142 /* And netatalk apps expect to stick the type in themselves */
143 };
144
145 /* AppleTalk AARP headers */
146 struct elapaarp {
147 __be16 hw_type;
148 #define AARP_HW_TYPE_ETHERNET 1
149 #define AARP_HW_TYPE_TOKENRING 2
150 __be16 pa_type;
151 __u8 hw_len;
152 __u8 pa_len;
153 #define AARP_PA_ALEN 4
154 __be16 function;
155 #define AARP_REQUEST 1
156 #define AARP_REPLY 2
157 #define AARP_PROBE 3
158 __u8 hw_src[ETH_ALEN];
159 __u8 pa_src_zero;
160 __be16 pa_src_net;
161 __u8 pa_src_node;
162 __u8 hw_dst[ETH_ALEN];
163 __u8 pa_dst_zero;
164 __be16 pa_dst_net;
165 __u8 pa_dst_node;
166 } __attribute__ ((packed));
167
168 static __inline__ struct elapaarp *aarp_hdr(struct sk_buff *skb)
169 {
170 return (struct elapaarp *)skb->h.raw;
171 }
172
173 /* Not specified - how long till we drop a resolved entry */
174 #define AARP_EXPIRY_TIME (5 * 60 * HZ)
175 /* Size of hash table */
176 #define AARP_HASH_SIZE 16
177 /* Fast retransmission timer when resolving */
178 #define AARP_TICK_TIME (HZ / 5)
179 /* Send 10 requests then give up (2 seconds) */
180 #define AARP_RETRANSMIT_LIMIT 10
181 /*
182 * Some value bigger than total retransmit time + a bit for last reply to
183 * appear and to stop continual requests
184 */
185 #define AARP_RESOLVE_TIME (10 * HZ)
186
187 extern struct datalink_proto *ddp_dl, *aarp_dl;
188 extern void aarp_proto_init(void);
189
190 /* Inter module exports */
191
192 /* Give a device find its atif control structure */
193 static inline struct atalk_iface *atalk_find_dev(struct net_device *dev)
194 {
195 return dev->atalk_ptr;
196 }
197
198 extern struct atalk_addr *atalk_find_dev_addr(struct net_device *dev);
199 extern struct net_device *atrtr_get_dev(struct atalk_addr *sa);
200 extern int aarp_send_ddp(struct net_device *dev,
201 struct sk_buff *skb,
202 struct atalk_addr *sa, void *hwaddr);
203 extern void aarp_device_down(struct net_device *dev);
204 extern void aarp_probe_network(struct atalk_iface *atif);
205 extern int aarp_proxy_probe_network(struct atalk_iface *atif,
206 struct atalk_addr *sa);
207 extern void aarp_proxy_remove(struct net_device *dev,
208 struct atalk_addr *sa);
209
210 extern void aarp_cleanup_module(void);
211
212 extern struct hlist_head atalk_sockets;
213 extern rwlock_t atalk_sockets_lock;
214
215 extern struct atalk_route *atalk_routes;
216 extern rwlock_t atalk_routes_lock;
217
218 extern struct atalk_iface *atalk_interfaces;
219 extern rwlock_t atalk_interfaces_lock;
220
221 extern struct atalk_route atrtr_default;
222
223 extern struct file_operations atalk_seq_arp_fops;
224
225 extern int sysctl_aarp_expiry_time;
226 extern int sysctl_aarp_tick_time;
227 extern int sysctl_aarp_retransmit_limit;
228 extern int sysctl_aarp_resolve_time;
229
230 #ifdef CONFIG_SYSCTL
231 extern void atalk_register_sysctl(void);
232 extern void atalk_unregister_sysctl(void);
233 #else
234 #define atalk_register_sysctl() do { } while(0)
235 #define atalk_unregister_sysctl() do { } while(0)
236 #endif
237
238 #ifdef CONFIG_PROC_FS
239 extern int atalk_proc_init(void);
240 extern void atalk_proc_exit(void);
241 #else
242 #define atalk_proc_init() ({ 0; })
243 #define atalk_proc_exit() do { } while(0)
244 #endif /* CONFIG_PROC_FS */
245
246 #endif /* __KERNEL__ */
247 #endif /* __LINUX_ATALK_H__ */
248
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