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