1 #ifndef _NET_INET_IPX_H_
2 #define _NET_INET_IPX_H_
3 /*
4 * The following information is in its entirety obtained from:
5 *
6 * Novell 'IPX Router Specification' Version 1.10
7 * Part No. 107-000029-001
8 *
9 * Which is available from ftp.novell.com
10 */
11
12 #include <linux/netdevice.h>
13 #include <net/datalink.h>
14 #include <linux/ipx.h>
15 #include <linux/list.h>
16
17 struct ipx_address {
18 __be32 net;
19 __u8 node[IPX_NODE_LEN];
20 __be16 sock;
21 };
22
23 #define ipx_broadcast_node "\377\377\377\377\377\377"
24 #define ipx_this_node "\0\0\0\0\0\0"
25
26 #define IPX_MAX_PPROP_HOPS 8
27
28 struct ipxhdr {
29 __be16 ipx_checksum __attribute__ ((packed));
30 #define IPX_NO_CHECKSUM cpu_to_be16(0xFFFF)
31 __be16 ipx_pktsize __attribute__ ((packed));
32 __u8 ipx_tctrl;
33 __u8 ipx_type;
34 #define IPX_TYPE_UNKNOWN 0x00
35 #define IPX_TYPE_RIP 0x01 /* may also be 0 */
36 #define IPX_TYPE_SAP 0x04 /* may also be 0 */
37 #define IPX_TYPE_SPX 0x05 /* SPX protocol */
38 #define IPX_TYPE_NCP 0x11 /* $lots for docs on this (SPIT) */
39 #define IPX_TYPE_PPROP 0x14 /* complicated flood fill brdcast */
40 struct ipx_address ipx_dest __attribute__ ((packed));
41 struct ipx_address ipx_source __attribute__ ((packed));
42 };
43
44 static __inline__ struct ipxhdr *ipx_hdr(struct sk_buff *skb)
45 {
46 return (struct ipxhdr *)skb_transport_header(skb);
47 }
48
49 struct ipx_interface {
50 /* IPX address */
51 __be32 if_netnum;
52 unsigned char if_node[IPX_NODE_LEN];
53 atomic_t refcnt;
54
55 /* physical device info */
56 struct net_device *if_dev;
57 struct datalink_proto *if_dlink;
58 __be16 if_dlink_type;
59
60 /* socket support */
61 unsigned short if_sknum;
62 struct hlist_head if_sklist;
63 spinlock_t if_sklist_lock;
64
65 /* administrative overhead */
66 int if_ipx_offset;
67 unsigned char if_internal;
68 unsigned char if_primary;
69
70 struct list_head node; /* node in ipx_interfaces list */
71 };
72
73 struct ipx_route {
74 __be32 ir_net;
75 struct ipx_interface *ir_intrfc;
76 unsigned char ir_routed;
77 unsigned char ir_router_node[IPX_NODE_LEN];
78 struct list_head node; /* node in ipx_routes list */
79 atomic_t refcnt;
80 };
81
82 #ifdef __KERNEL__
83 struct ipx_cb {
84 u8 ipx_tctrl;
85 __be32 ipx_dest_net;
86 __be32 ipx_source_net;
87 struct {
88 __be32 netnum;
89 int index;
90 } last_hop;
91 };
92
93 #include <net/sock.h>
94
95 struct ipx_sock {
96 /* struct sock has to be the first member of ipx_sock */
97 struct sock sk;
98 struct ipx_address dest_addr;
99 struct ipx_interface *intrfc;
100 __be16 port;
101 #ifdef CONFIG_IPX_INTERN
102 unsigned char node[IPX_NODE_LEN];
103 #endif
104 unsigned short type;
105 /*
106 * To handle special ncp connection-handling sockets for mars_nwe,
107 * the connection number must be stored in the socket.
108 */
109 unsigned short ipx_ncp_conn;
110 };
111
112 static inline struct ipx_sock *ipx_sk(struct sock *sk)
113 {
114 return (struct ipx_sock *)sk;
115 }
116
117 #define IPX_SKB_CB(__skb) ((struct ipx_cb *)&((__skb)->cb[0]))
118 #endif
119
120 #define IPX_MIN_EPHEMERAL_SOCKET 0x4000
121 #define IPX_MAX_EPHEMERAL_SOCKET 0x7fff
122
123 extern struct list_head ipx_routes;
124 extern rwlock_t ipx_routes_lock;
125
126 extern struct list_head ipx_interfaces;
127 extern struct ipx_interface *ipx_interfaces_head(void);
128 extern spinlock_t ipx_interfaces_lock;
129
130 extern struct ipx_interface *ipx_primary_net;
131
132 extern int ipx_proc_init(void);
133 extern void ipx_proc_exit(void);
134
135 extern const char *ipx_frame_name(__be16);
136 extern const char *ipx_device_name(struct ipx_interface *intrfc);
137
138 static __inline__ void ipxitf_hold(struct ipx_interface *intrfc)
139 {
140 atomic_inc(&intrfc->refcnt);
141 }
142
143 extern void ipxitf_down(struct ipx_interface *intrfc);
144
145 static __inline__ void ipxitf_put(struct ipx_interface *intrfc)
146 {
147 if (atomic_dec_and_test(&intrfc->refcnt))
148 ipxitf_down(intrfc);
149 }
150
151 static __inline__ void ipxrtr_hold(struct ipx_route *rt)
152 {
153 atomic_inc(&rt->refcnt);
154 }
155
156 static __inline__ void ipxrtr_put(struct ipx_route *rt)
157 {
158 if (atomic_dec_and_test(&rt->refcnt))
159 kfree(rt);
160 }
161 #endif /* _NET_INET_IPX_H_ */
162
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