Linux kernel mirror (for testing)
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1#ifndef __LINUX_ATALK_H__
2#define __LINUX_ATALK_H__
3
4/*
5 * AppleTalk networking structures
6 *
7 * The following are directly referenced from the University Of Michigan
8 * netatalk for compatibility reasons.
9 */
10#define ATPORT_FIRST 1
11#define ATPORT_RESERVED 128
12#define ATPORT_LAST 254 /* 254 is only legal on localtalk */
13#define ATADDR_ANYNET (__u16)0
14#define ATADDR_ANYNODE (__u8)0
15#define ATADDR_ANYPORT (__u8)0
16#define ATADDR_BCAST (__u8)255
17#define DDP_MAXSZ 587
18#define DDP_MAXHOPS 15 /* 4 bits of hop counter */
19
20#define SIOCATALKDIFADDR (SIOCPROTOPRIVATE + 0)
21
22struct atalk_addr {
23 __u16 s_net;
24 __u8 s_node;
25};
26
27struct sockaddr_at {
28 sa_family_t sat_family;
29 __u8 sat_port;
30 struct atalk_addr sat_addr;
31 char sat_zero[8];
32};
33
34struct atalk_netrange {
35 __u8 nr_phase;
36 __u16 nr_firstnet;
37 __u16 nr_lastnet;
38};
39
40#ifdef __KERNEL__
41
42#include <net/sock.h>
43
44struct atalk_route {
45 struct net_device *dev;
46 struct atalk_addr target;
47 struct atalk_addr gateway;
48 int flags;
49 struct atalk_route *next;
50};
51
52/**
53 * struct atalk_iface - AppleTalk Interface
54 * @dev - Network device associated with this interface
55 * @address - Our address
56 * @status - What are we doing?
57 * @nets - Associated direct netrange
58 * @next - next element in the list of interfaces
59 */
60struct atalk_iface {
61 struct net_device *dev;
62 struct atalk_addr address;
63 int status;
64#define ATIF_PROBE 1 /* Probing for an address */
65#define ATIF_PROBE_FAIL 2 /* Probe collided */
66 struct atalk_netrange nets;
67 struct atalk_iface *next;
68};
69
70struct atalk_sock {
71 /* struct sock has to be the first member of atalk_sock */
72 struct sock sk;
73 unsigned short dest_net;
74 unsigned short src_net;
75 unsigned char dest_node;
76 unsigned char src_node;
77 unsigned char dest_port;
78 unsigned char src_port;
79};
80
81static inline struct atalk_sock *at_sk(struct sock *sk)
82{
83 return (struct atalk_sock *)sk;
84}
85
86#include <asm/byteorder.h>
87
88struct 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
108static __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 */
117struct 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 */
130struct 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 */
144struct 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
166static __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
185extern struct datalink_proto *ddp_dl, *aarp_dl;
186extern void aarp_proto_init(void);
187
188/* Inter module exports */
189
190/* Give a device find its atif control structure */
191static inline struct atalk_iface *atalk_find_dev(struct net_device *dev)
192{
193 return dev->atalk_ptr;
194}
195
196extern struct atalk_addr *atalk_find_dev_addr(struct net_device *dev);
197extern struct net_device *atrtr_get_dev(struct atalk_addr *sa);
198extern int aarp_send_ddp(struct net_device *dev,
199 struct sk_buff *skb,
200 struct atalk_addr *sa, void *hwaddr);
201extern void aarp_device_down(struct net_device *dev);
202extern void aarp_probe_network(struct atalk_iface *atif);
203extern int aarp_proxy_probe_network(struct atalk_iface *atif,
204 struct atalk_addr *sa);
205extern void aarp_proxy_remove(struct net_device *dev,
206 struct atalk_addr *sa);
207
208extern void aarp_cleanup_module(void);
209
210extern struct hlist_head atalk_sockets;
211extern rwlock_t atalk_sockets_lock;
212
213extern struct atalk_route *atalk_routes;
214extern rwlock_t atalk_routes_lock;
215
216extern struct atalk_iface *atalk_interfaces;
217extern rwlock_t atalk_interfaces_lock;
218
219extern struct atalk_route atrtr_default;
220
221extern struct file_operations atalk_seq_arp_fops;
222
223extern int sysctl_aarp_expiry_time;
224extern int sysctl_aarp_tick_time;
225extern int sysctl_aarp_retransmit_limit;
226extern int sysctl_aarp_resolve_time;
227
228#ifdef CONFIG_SYSCTL
229extern void atalk_register_sysctl(void);
230extern 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
237extern int atalk_proc_init(void);
238extern 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__ */