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