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 #include <linux/slab.h>
17 
18 struct ipx_address {
19 	__be32  net;
20 	__u8    node[IPX_NODE_LEN];
21 	__be16  sock;
22 };
23 
24 #define ipx_broadcast_node	"\377\377\377\377\377\377"
25 #define ipx_this_node           "\0\0\0\0\0\0"
26 
27 #define IPX_MAX_PPROP_HOPS 8
28 
29 struct ipxhdr {
30 	__be16			ipx_checksum __packed;
31 #define IPX_NO_CHECKSUM	cpu_to_be16(0xFFFF)
32 	__be16			ipx_pktsize __packed;
33 	__u8			ipx_tctrl;
34 	__u8			ipx_type;
35 #define IPX_TYPE_UNKNOWN	0x00
36 #define IPX_TYPE_RIP		0x01	/* may also be 0 */
37 #define IPX_TYPE_SAP		0x04	/* may also be 0 */
38 #define IPX_TYPE_SPX		0x05	/* SPX protocol */
39 #define IPX_TYPE_NCP		0x11	/* $lots for docs on this (SPIT) */
40 #define IPX_TYPE_PPROP		0x14	/* complicated flood fill brdcast */
41 	struct ipx_address	ipx_dest __packed;
42 	struct ipx_address	ipx_source __packed;
43 };
44 
ipx_hdr(struct sk_buff * skb)45 static __inline__ struct ipxhdr *ipx_hdr(struct sk_buff *skb)
46 {
47 	return (struct ipxhdr *)skb_transport_header(skb);
48 }
49 
50 struct ipx_interface {
51 	/* IPX address */
52 	__be32			if_netnum;
53 	unsigned char		if_node[IPX_NODE_LEN];
54 	atomic_t		refcnt;
55 
56 	/* physical device info */
57 	struct net_device	*if_dev;
58 	struct datalink_proto	*if_dlink;
59 	__be16			if_dlink_type;
60 
61 	/* socket support */
62 	unsigned short		if_sknum;
63 	struct hlist_head	if_sklist;
64 	spinlock_t		if_sklist_lock;
65 
66 	/* administrative overhead */
67 	int			if_ipx_offset;
68 	unsigned char		if_internal;
69 	unsigned char		if_primary;
70 
71 	struct list_head	node; /* node in ipx_interfaces list */
72 };
73 
74 struct ipx_route {
75 	__be32			ir_net;
76 	struct ipx_interface	*ir_intrfc;
77 	unsigned char		ir_routed;
78 	unsigned char		ir_router_node[IPX_NODE_LEN];
79 	struct list_head	node; /* node in ipx_routes list */
80 	atomic_t		refcnt;
81 };
82 
83 #ifdef __KERNEL__
84 struct ipx_cb {
85 	u8	ipx_tctrl;
86 	__be32	ipx_dest_net;
87 	__be32	ipx_source_net;
88 	struct {
89 		__be32 netnum;
90 		int index;
91 	} last_hop;
92 };
93 
94 #include <net/sock.h>
95 
96 struct ipx_sock {
97 	/* struct sock has to be the first member of ipx_sock */
98 	struct sock		sk;
99 	struct ipx_address	dest_addr;
100 	struct ipx_interface	*intrfc;
101 	__be16			port;
102 #ifdef CONFIG_IPX_INTERN
103 	unsigned char		node[IPX_NODE_LEN];
104 #endif
105 	unsigned short		type;
106 	/*
107 	 * To handle special ncp connection-handling sockets for mars_nwe,
108  	 * the connection number must be stored in the socket.
109 	 */
110 	unsigned short		ipx_ncp_conn;
111 };
112 
ipx_sk(struct sock * sk)113 static inline struct ipx_sock *ipx_sk(struct sock *sk)
114 {
115 	return (struct ipx_sock *)sk;
116 }
117 
118 #define IPX_SKB_CB(__skb) ((struct ipx_cb *)&((__skb)->cb[0]))
119 #endif
120 
121 #define IPX_MIN_EPHEMERAL_SOCKET	0x4000
122 #define IPX_MAX_EPHEMERAL_SOCKET	0x7fff
123 
124 extern struct list_head ipx_routes;
125 extern rwlock_t ipx_routes_lock;
126 
127 extern struct list_head ipx_interfaces;
128 extern struct ipx_interface *ipx_interfaces_head(void);
129 extern spinlock_t ipx_interfaces_lock;
130 
131 extern struct ipx_interface *ipx_primary_net;
132 
133 extern int ipx_proc_init(void);
134 extern void ipx_proc_exit(void);
135 
136 extern const char *ipx_frame_name(__be16);
137 extern const char *ipx_device_name(struct ipx_interface *intrfc);
138 
ipxitf_hold(struct ipx_interface * intrfc)139 static __inline__ void ipxitf_hold(struct ipx_interface *intrfc)
140 {
141 	atomic_inc(&intrfc->refcnt);
142 }
143 
144 extern void ipxitf_down(struct ipx_interface *intrfc);
145 
ipxitf_put(struct ipx_interface * intrfc)146 static __inline__ void ipxitf_put(struct ipx_interface *intrfc)
147 {
148 	if (atomic_dec_and_test(&intrfc->refcnt))
149 		ipxitf_down(intrfc);
150 }
151 
ipxrtr_hold(struct ipx_route * rt)152 static __inline__ void ipxrtr_hold(struct ipx_route *rt)
153 {
154 	        atomic_inc(&rt->refcnt);
155 }
156 
ipxrtr_put(struct ipx_route * rt)157 static __inline__ void ipxrtr_put(struct ipx_route *rt)
158 {
159 	        if (atomic_dec_and_test(&rt->refcnt))
160 			                kfree(rt);
161 }
162 #endif /* _NET_INET_IPX_H_ */
163