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1 | /* SPDX-License-Identifier: GPL-2.0 */ |
---|---|
2 | #ifndef __LINUX_ATALK_H__ |
3 | #define __LINUX_ATALK_H__ |
4 | |
5 | |
6 | #include <net/sock.h> |
7 | #include <uapi/linux/atalk.h> |
8 | |
9 | struct atalk_route { |
10 | struct net_device *dev; |
11 | struct atalk_addr target; |
12 | struct atalk_addr gateway; |
13 | int flags; |
14 | struct atalk_route *next; |
15 | }; |
16 | |
17 | /** |
18 | * struct atalk_iface - AppleTalk Interface |
19 | * @dev - Network device associated with this interface |
20 | * @address - Our address |
21 | * @status - What are we doing? |
22 | * @nets - Associated direct netrange |
23 | * @next - next element in the list of interfaces |
24 | */ |
25 | struct atalk_iface { |
26 | struct net_device *dev; |
27 | struct atalk_addr address; |
28 | int status; |
29 | #define ATIF_PROBE 1 /* Probing for an address */ |
30 | #define ATIF_PROBE_FAIL 2 /* Probe collided */ |
31 | struct atalk_netrange nets; |
32 | struct atalk_iface *next; |
33 | }; |
34 | |
35 | struct atalk_sock { |
36 | /* struct sock has to be the first member of atalk_sock */ |
37 | struct sock sk; |
38 | __be16 dest_net; |
39 | __be16 src_net; |
40 | unsigned char dest_node; |
41 | unsigned char src_node; |
42 | unsigned char dest_port; |
43 | unsigned char src_port; |
44 | }; |
45 | |
46 | static inline struct atalk_sock *at_sk(struct sock *sk) |
47 | { |
48 | return (struct atalk_sock *)sk; |
49 | } |
50 | |
51 | struct ddpehdr { |
52 | __be16 deh_len_hops; /* lower 10 bits are length, next 4 - hops */ |
53 | __be16 deh_sum; |
54 | __be16 deh_dnet; |
55 | __be16 deh_snet; |
56 | __u8 deh_dnode; |
57 | __u8 deh_snode; |
58 | __u8 deh_dport; |
59 | __u8 deh_sport; |
60 | /* And netatalk apps expect to stick the type in themselves */ |
61 | }; |
62 | |
63 | static __inline__ struct ddpehdr *ddp_hdr(struct sk_buff *skb) |
64 | { |
65 | return (struct ddpehdr *)skb_transport_header(skb); |
66 | } |
67 | |
68 | /* AppleTalk AARP headers */ |
69 | struct elapaarp { |
70 | __be16 hw_type; |
71 | #define AARP_HW_TYPE_ETHERNET 1 |
72 | #define AARP_HW_TYPE_TOKENRING 2 |
73 | __be16 pa_type; |
74 | __u8 hw_len; |
75 | __u8 pa_len; |
76 | #define AARP_PA_ALEN 4 |
77 | __be16 function; |
78 | #define AARP_REQUEST 1 |
79 | #define AARP_REPLY 2 |
80 | #define AARP_PROBE 3 |
81 | __u8 hw_src[ETH_ALEN]; |
82 | __u8 pa_src_zero; |
83 | __be16 pa_src_net; |
84 | __u8 pa_src_node; |
85 | __u8 hw_dst[ETH_ALEN]; |
86 | __u8 pa_dst_zero; |
87 | __be16 pa_dst_net; |
88 | __u8 pa_dst_node; |
89 | } __attribute__ ((packed)); |
90 | |
91 | static __inline__ struct elapaarp *aarp_hdr(struct sk_buff *skb) |
92 | { |
93 | return (struct elapaarp *)skb_transport_header(skb); |
94 | } |
95 | |
96 | /* Not specified - how long till we drop a resolved entry */ |
97 | #define AARP_EXPIRY_TIME (5 * 60 * HZ) |
98 | /* Size of hash table */ |
99 | #define AARP_HASH_SIZE 16 |
100 | /* Fast retransmission timer when resolving */ |
101 | #define AARP_TICK_TIME (HZ / 5) |
102 | /* Send 10 requests then give up (2 seconds) */ |
103 | #define AARP_RETRANSMIT_LIMIT 10 |
104 | /* |
105 | * Some value bigger than total retransmit time + a bit for last reply to |
106 | * appear and to stop continual requests |
107 | */ |
108 | #define AARP_RESOLVE_TIME (10 * HZ) |
109 | |
110 | extern struct datalink_proto *ddp_dl, *aarp_dl; |
111 | extern int aarp_proto_init(void); |
112 | |
113 | /* Inter module exports */ |
114 | |
115 | /* Give a device find its atif control structure */ |
116 | #if IS_ENABLED(CONFIG_ATALK) |
117 | static inline struct atalk_iface *atalk_find_dev(struct net_device *dev) |
118 | { |
119 | return dev->atalk_ptr; |
120 | } |
121 | #endif |
122 | |
123 | extern struct atalk_addr *atalk_find_dev_addr(struct net_device *dev); |
124 | extern struct net_device *atrtr_get_dev(struct atalk_addr *sa); |
125 | extern int aarp_send_ddp(struct net_device *dev, |
126 | struct sk_buff *skb, |
127 | struct atalk_addr *sa, void *hwaddr); |
128 | extern void aarp_device_down(struct net_device *dev); |
129 | extern void aarp_probe_network(struct atalk_iface *atif); |
130 | extern int aarp_proxy_probe_network(struct atalk_iface *atif, |
131 | struct atalk_addr *sa); |
132 | extern void aarp_proxy_remove(struct net_device *dev, |
133 | struct atalk_addr *sa); |
134 | |
135 | extern void aarp_cleanup_module(void); |
136 | |
137 | extern struct hlist_head atalk_sockets; |
138 | extern rwlock_t atalk_sockets_lock; |
139 | |
140 | extern struct atalk_route *atalk_routes; |
141 | extern rwlock_t atalk_routes_lock; |
142 | |
143 | extern struct atalk_iface *atalk_interfaces; |
144 | extern rwlock_t atalk_interfaces_lock; |
145 | |
146 | extern struct atalk_route atrtr_default; |
147 | |
148 | struct aarp_iter_state { |
149 | int bucket; |
150 | struct aarp_entry **table; |
151 | }; |
152 | |
153 | extern const struct seq_operations aarp_seq_ops; |
154 | |
155 | extern int sysctl_aarp_expiry_time; |
156 | extern int sysctl_aarp_tick_time; |
157 | extern int sysctl_aarp_retransmit_limit; |
158 | extern int sysctl_aarp_resolve_time; |
159 | |
160 | #ifdef CONFIG_SYSCTL |
161 | extern int atalk_register_sysctl(void); |
162 | extern void atalk_unregister_sysctl(void); |
163 | #else |
164 | static inline int atalk_register_sysctl(void) |
165 | { |
166 | return 0; |
167 | } |
168 | static inline void atalk_unregister_sysctl(void) |
169 | { |
170 | } |
171 | #endif |
172 | |
173 | #ifdef CONFIG_PROC_FS |
174 | extern int atalk_proc_init(void); |
175 | extern void atalk_proc_exit(void); |
176 | #else |
177 | static inline int atalk_proc_init(void) |
178 | { |
179 | return 0; |
180 | } |
181 | static inline void atalk_proc_exit(void) |
182 | { |
183 | } |
184 | #endif /* CONFIG_PROC_FS */ |
185 | |
186 | #endif /* __LINUX_ATALK_H__ */ |
187 |
Warning: This file is not a C or C++ file. It does not have highlighting.