1 /*
2 * AppleTalk networking structures
3 *
4 * The following are directly referenced from the University Of Michigan
5 * netatalk for compatibility reasons.
6 */
7
8 #ifndef __LINUX_ATALK_H__
9 #define __LINUX_ATALK_H__
10
11 #define ATPORT_FIRST 1
12 #define ATPORT_RESERVED 128
13 #define ATPORT_LAST 254 /* 254 is only legal on localtalk */
14 #define ATADDR_ANYNET (__u16)0
15 #define ATADDR_ANYNODE (__u8)0
16 #define ATADDR_ANYPORT (__u8)0
17 #define ATADDR_BCAST (__u8)255
18 #define DDP_MAXSZ 587
19 #define DDP_MAXHOPS 15 /* 4 bits of hop counter */
20
21 #define SIOCATALKDIFADDR (SIOCPROTOPRIVATE + 0)
22
23 struct at_addr
24 {
25 __u16 s_net;
26 __u8 s_node;
27 };
28
29 struct sockaddr_at
30 {
31 sa_family_t sat_family;
32 __u8 sat_port;
33 struct at_addr sat_addr;
34 char sat_zero[ 8 ];
35 };
36
37 struct netrange
38 {
39 __u8 nr_phase;
40 __u16 nr_firstnet;
41 __u16 nr_lastnet;
42 };
43
44 struct atalk_route
45 {
46 struct net_device *dev;
47 struct at_addr target;
48 struct at_addr gateway;
49 int flags;
50 struct atalk_route *next;
51 };
52
53 struct atalk_iface
54 {
55 struct net_device *dev;
56 struct at_addr address; /* Our address */
57 int status; /* What are we doing? */
58 #define ATIF_PROBE 1 /* Probing for an address */
59 #define ATIF_PROBE_FAIL 2 /* Probe collided */
60 struct netrange nets; /* Associated direct netrange */
61 struct atalk_iface *next;
62 };
63
64 struct atalk_sock
65 {
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 {
80 #ifdef __LITTLE_ENDIAN_BITFIELD
81 __u16 deh_len:10, deh_hops:4, deh_pad:2;
82 #else
83 __u16 deh_pad:2, deh_hops:4, deh_len:10;
84 #endif
85 __u16 deh_sum;
86 __u16 deh_dnet;
87 __u16 deh_snet;
88 __u8 deh_dnode;
89 __u8 deh_snode;
90 __u8 deh_dport;
91 __u8 deh_sport;
92 /* And netatalk apps expect to stick the type in themselves */
93 };
94
95 /*
96 * Don't drop the struct into the struct above. You'll get some
97 * surprise padding.
98 */
99
100 struct ddpebits
101 {
102 #ifdef __LITTLE_ENDIAN_BITFIELD
103 __u16 deh_len:10, deh_hops:4, deh_pad:2;
104 #else
105 __u16 deh_pad:2, deh_hops:4, deh_len:10;
106 #endif
107 };
108
109 /*
110 * Short form header
111 */
112
113 struct ddpshdr
114 {
115 #ifdef __LITTLE_ENDIAN_BITFIELD
116 __u16 dsh_len:10, dsh_pad:6;
117 #else
118 __u16 dsh_pad:6, dsh_len:10;
119 #endif
120 __u8 dsh_dport;
121 __u8 dsh_sport;
122 /* And netatalk apps expect to stick the type in themselves */
123 };
124
125 /* AppleTalk AARP headers */
126
127 struct elapaarp
128 {
129 __u16 hw_type;
130 #define AARP_HW_TYPE_ETHERNET 1
131 #define AARP_HW_TYPE_TOKENRING 2
132 __u16 pa_type;
133 __u8 hw_len;
134 __u8 pa_len;
135 #define AARP_PA_ALEN 4
136 __u16 function;
137 #define AARP_REQUEST 1
138 #define AARP_REPLY 2
139 #define AARP_PROBE 3
140 __u8 hw_src[ETH_ALEN] __attribute__ ((packed));
141 __u8 pa_src_zero __attribute__ ((packed));
142 __u16 pa_src_net __attribute__ ((packed));
143 __u8 pa_src_node __attribute__ ((packed));
144 __u8 hw_dst[ETH_ALEN] __attribute__ ((packed));
145 __u8 pa_dst_zero __attribute__ ((packed));
146 __u16 pa_dst_net __attribute__ ((packed));
147 __u8 pa_dst_node __attribute__ ((packed));
148 };
149
150 #define AARP_EXPIRY_TIME (5*60*HZ) /* Not specified - how long till we drop a resolved entry */
151 #define AARP_HASH_SIZE 16 /* Size of hash table */
152 #define AARP_TICK_TIME (HZ/5) /* Fast retransmission timer when resolving */
153 #define AARP_RETRANSMIT_LIMIT 10 /* Send 10 requests then give up (2 seconds) */
154 #define AARP_RESOLVE_TIME (10*HZ) /* Some value bigger than total retransmit time + a bit for last reply to appear and to stop continual requests */
155
156 extern struct datalink_proto *ddp_dl, *aarp_dl;
157 extern void aarp_proto_init(void);
158 /* Inter module exports */
159
160 /*
161 * Give a device find its atif control structure
162 */
163
164 static inline struct atalk_iface *atalk_find_dev(struct net_device *dev)
165 {
166 return dev->atalk_ptr;
167 }
168
169 extern struct at_addr *atalk_find_dev_addr(struct net_device *dev);
170 extern struct net_device *atrtr_get_dev(struct at_addr *sa);
171 extern int aarp_send_ddp(struct net_device *dev,struct sk_buff *skb, struct at_addr *sa, void *hwaddr);
172 extern void aarp_send_probe(struct net_device *dev, struct at_addr *addr);
173 extern void aarp_device_down(struct net_device *dev);
174
175 #ifdef MODULE
176 extern void aarp_cleanup_module(void);
177 #endif /* MODULE */
178
179 #endif /* __KERNEL__ */
180 #endif /* __LINUX_ATALK_H__ */
181
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