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  • only in /asuswrt-rt-n18u-9.0.0.4.380.2695/release/src-rt-6.x.4708/linux/linux-2.6/include/linux/
1#ifndef __LINUX_ATALK_H__
2#define __LINUX_ATALK_H__
3
4#include <linux/types.h>
5#include <asm/byteorder.h>
6
7/*
8 * AppleTalk networking structures
9 *
10 * The following are directly referenced from the University Of Michigan
11 * netatalk for compatibility reasons.
12 */
13#define ATPORT_FIRST	1
14#define ATPORT_RESERVED	128
15#define ATPORT_LAST	254		/* 254 is only legal on localtalk */
16#define ATADDR_ANYNET	(__u16)0
17#define ATADDR_ANYNODE	(__u8)0
18#define ATADDR_ANYPORT  (__u8)0
19#define ATADDR_BCAST	(__u8)255
20#define DDP_MAXSZ	587
21#define DDP_MAXHOPS     15		/* 4 bits of hop counter */
22
23#define SIOCATALKDIFADDR       (SIOCPROTOPRIVATE + 0)
24
25struct atalk_addr {
26	__be16	s_net;
27	__u8	s_node;
28};
29
30struct sockaddr_at {
31	sa_family_t	  sat_family;
32	__u8		  sat_port;
33	struct atalk_addr sat_addr;
34	char		  sat_zero[8];
35};
36
37struct atalk_netrange {
38	__u8	nr_phase;
39	__be16	nr_firstnet;
40	__be16	nr_lastnet;
41};
42
43#ifdef __KERNEL__
44
45#include <net/sock.h>
46
47struct atalk_route {
48	struct net_device  *dev;
49	struct atalk_addr  target;
50	struct atalk_addr  gateway;
51	int		   flags;
52	struct atalk_route *next;
53};
54
55/**
56 *	struct atalk_iface - AppleTalk Interface
57 *	@dev - Network device associated with this interface
58 *	@address - Our address
59 *	@status - What are we doing?
60 *	@nets - Associated direct netrange
61 *	@next - next element in the list of interfaces
62 */
63struct atalk_iface {
64	struct net_device	*dev;
65	struct atalk_addr	address;
66	int			status;
67#define ATIF_PROBE	1		/* Probing for an address */
68#define ATIF_PROBE_FAIL	2		/* Probe collided */
69	struct atalk_netrange	nets;
70	struct atalk_iface	*next;
71};
72
73struct atalk_sock {
74	/* struct sock has to be the first member of atalk_sock */
75	struct sock	sk;
76	__be16		dest_net;
77	__be16		src_net;
78	unsigned char	dest_node;
79	unsigned char	src_node;
80	unsigned char	dest_port;
81	unsigned char	src_port;
82};
83
84static inline struct atalk_sock *at_sk(struct sock *sk)
85{
86	return (struct atalk_sock *)sk;
87}
88
89struct ddpehdr {
90	__be16	deh_len_hops;	/* lower 10 bits are length, next 4 - hops */
91	__be16	deh_sum;
92	__be16	deh_dnet;
93	__be16	deh_snet;
94	__u8	deh_dnode;
95	__u8	deh_snode;
96	__u8	deh_dport;
97	__u8	deh_sport;
98	/* And netatalk apps expect to stick the type in themselves */
99};
100
101static __inline__ struct ddpehdr *ddp_hdr(struct sk_buff *skb)
102{
103	return (struct ddpehdr *)skb_transport_header(skb);
104}
105
106/* AppleTalk AARP headers */
107struct elapaarp {
108	__be16	hw_type;
109#define AARP_HW_TYPE_ETHERNET		1
110#define AARP_HW_TYPE_TOKENRING		2
111	__be16	pa_type;
112	__u8	hw_len;
113	__u8	pa_len;
114#define AARP_PA_ALEN			4
115	__be16	function;
116#define AARP_REQUEST			1
117#define AARP_REPLY			2
118#define AARP_PROBE			3
119	__u8	hw_src[ETH_ALEN];
120	__u8	pa_src_zero;
121	__be16	pa_src_net;
122	__u8	pa_src_node;
123	__u8	hw_dst[ETH_ALEN];
124	__u8	pa_dst_zero;
125	__be16	pa_dst_net;
126	__u8	pa_dst_node;
127} __attribute__ ((packed));
128
129static __inline__ struct elapaarp *aarp_hdr(struct sk_buff *skb)
130{
131	return (struct elapaarp *)skb_transport_header(skb);
132}
133
134/* Not specified - how long till we drop a resolved entry */
135#define AARP_EXPIRY_TIME	(5 * 60 * HZ)
136/* Size of hash table */
137#define AARP_HASH_SIZE		16
138/* Fast retransmission timer when resolving */
139#define AARP_TICK_TIME		(HZ / 5)
140/* Send 10 requests then give up (2 seconds) */
141#define AARP_RETRANSMIT_LIMIT	10
142/*
143 * Some value bigger than total retransmit time + a bit for last reply to
144 * appear and to stop continual requests
145 */
146#define AARP_RESOLVE_TIME	(10 * HZ)
147
148extern struct datalink_proto *ddp_dl, *aarp_dl;
149extern void aarp_proto_init(void);
150
151/* Inter module exports */
152
153/* Give a device find its atif control structure */
154static inline struct atalk_iface *atalk_find_dev(struct net_device *dev)
155{
156	return dev->atalk_ptr;
157}
158
159extern struct atalk_addr *atalk_find_dev_addr(struct net_device *dev);
160extern struct net_device *atrtr_get_dev(struct atalk_addr *sa);
161extern int		 aarp_send_ddp(struct net_device *dev,
162				       struct sk_buff *skb,
163				       struct atalk_addr *sa, void *hwaddr);
164extern void		 aarp_device_down(struct net_device *dev);
165extern void		 aarp_probe_network(struct atalk_iface *atif);
166extern int 		 aarp_proxy_probe_network(struct atalk_iface *atif,
167				     struct atalk_addr *sa);
168extern void		 aarp_proxy_remove(struct net_device *dev,
169					   struct atalk_addr *sa);
170
171extern void		aarp_cleanup_module(void);
172
173extern struct hlist_head atalk_sockets;
174extern rwlock_t atalk_sockets_lock;
175
176extern struct atalk_route *atalk_routes;
177extern rwlock_t atalk_routes_lock;
178
179extern struct atalk_iface *atalk_interfaces;
180extern rwlock_t atalk_interfaces_lock;
181
182extern struct atalk_route atrtr_default;
183
184extern const struct file_operations atalk_seq_arp_fops;
185
186extern int sysctl_aarp_expiry_time;
187extern int sysctl_aarp_tick_time;
188extern int sysctl_aarp_retransmit_limit;
189extern int sysctl_aarp_resolve_time;
190
191#ifdef CONFIG_SYSCTL
192extern void atalk_register_sysctl(void);
193extern void atalk_unregister_sysctl(void);
194#else
195#define atalk_register_sysctl()		do { } while(0)
196#define atalk_unregister_sysctl()	do { } while(0)
197#endif
198
199#ifdef CONFIG_PROC_FS
200extern int atalk_proc_init(void);
201extern void atalk_proc_exit(void);
202#else
203#define atalk_proc_init()	({ 0; })
204#define atalk_proc_exit()	do { } while(0)
205#endif /* CONFIG_PROC_FS */
206
207#endif /* __KERNEL__ */
208#endif /* __LINUX_ATALK_H__ */
209