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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
1da177e4 LT |
2 | #ifndef __LINUX_ATALK_H__ |
3 | #define __LINUX_ATALK_H__ | |
4 | ||
9f3786dc DM |
5 | |
6 | #include <net/sock.h> | |
607ca46e | 7 | #include <uapi/linux/atalk.h> |
9f3786dc | 8 | |
1da177e4 LT |
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; | |
f6e276ee AD |
38 | __be16 dest_net; |
39 | __be16 src_net; | |
1da177e4 LT |
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 | ||
1da177e4 | 51 | struct ddpehdr { |
2a50f28c | 52 | __be16 deh_len_hops; /* lower 10 bits are length, next 4 - hops */ |
f6e276ee AD |
53 | __be16 deh_sum; |
54 | __be16 deh_dnet; | |
55 | __be16 deh_snet; | |
1da177e4 LT |
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 | { | |
9c70220b | 65 | return (struct ddpehdr *)skb_transport_header(skb); |
1da177e4 LT |
66 | } |
67 | ||
1da177e4 LT |
68 | /* AppleTalk AARP headers */ |
69 | struct elapaarp { | |
f6e276ee | 70 | __be16 hw_type; |
1da177e4 LT |
71 | #define AARP_HW_TYPE_ETHERNET 1 |
72 | #define AARP_HW_TYPE_TOKENRING 2 | |
f6e276ee | 73 | __be16 pa_type; |
1da177e4 LT |
74 | __u8 hw_len; |
75 | __u8 pa_len; | |
76 | #define AARP_PA_ALEN 4 | |
f6e276ee | 77 | __be16 function; |
1da177e4 LT |
78 | #define AARP_REQUEST 1 |
79 | #define AARP_REPLY 2 | |
80 | #define AARP_PROBE 3 | |
6a878184 JB |
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)); | |
1da177e4 LT |
90 | |
91 | static __inline__ struct elapaarp *aarp_hdr(struct sk_buff *skb) | |
92 | { | |
9c70220b | 93 | return (struct elapaarp *)skb_transport_header(skb); |
1da177e4 LT |
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; | |
9804501f | 111 | extern int aarp_proto_init(void); |
1da177e4 LT |
112 | |
113 | /* Inter module exports */ | |
114 | ||
115 | /* Give a device find its atif control structure */ | |
89e58148 | 116 | #if IS_ENABLED(CONFIG_IRDA) || IS_ENABLED(CONFIG_ATALK) |
1da177e4 LT |
117 | static inline struct atalk_iface *atalk_find_dev(struct net_device *dev) |
118 | { | |
119 | return dev->atalk_ptr; | |
120 | } | |
89e58148 | 121 | #endif |
1da177e4 LT |
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 | ||
44414d82 CH |
148 | struct aarp_iter_state { |
149 | int bucket; | |
150 | struct aarp_entry **table; | |
151 | }; | |
152 | ||
153 | extern const struct seq_operations aarp_seq_ops; | |
1da177e4 LT |
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 | |
6377f787 | 161 | extern int atalk_register_sysctl(void); |
1da177e4 LT |
162 | extern void atalk_unregister_sysctl(void); |
163 | #else | |
27da0d2e AB |
164 | static inline int atalk_register_sysctl(void) |
165 | { | |
166 | return 0; | |
167 | } | |
168 | static inline void atalk_unregister_sysctl(void) | |
169 | { | |
170 | } | |
1da177e4 LT |
171 | #endif |
172 | ||
173 | #ifdef CONFIG_PROC_FS | |
174 | extern int atalk_proc_init(void); | |
175 | extern void atalk_proc_exit(void); | |
176 | #else | |
27da0d2e AB |
177 | static inline int atalk_proc_init(void) |
178 | { | |
179 | return 0; | |
180 | } | |
181 | static inline void atalk_proc_exit(void) | |
182 | { | |
183 | } | |
1da177e4 LT |
184 | #endif /* CONFIG_PROC_FS */ |
185 | ||
1da177e4 | 186 | #endif /* __LINUX_ATALK_H__ */ |