summaryrefslogtreecommitdiff
path: root/include/net/ipx.h
blob: 4a423d2695baebcdd33dc5c02ae2a05b0c435eee (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
#ifndef _NET_INET_IPX_H_
#define _NET_INET_IPX_H_
/*
 *	The following information is in its entirety obtained from:
 *
 *	Novell 'IPX Router Specification' Version 1.10 
 *		Part No. 107-000029-001
 *
 *	Which is available from ftp.novell.com
 */

#include <linux/netdevice.h>
#include <net/datalink.h>
#include <linux/ipx.h>
#include <linux/list.h>

struct ipx_address {
	__be32  net;
	__u8    node[IPX_NODE_LEN]; 
	__be16  sock;
};

#define ipx_broadcast_node	"\377\377\377\377\377\377"
#define ipx_this_node           "\0\0\0\0\0\0"

#define IPX_MAX_PPROP_HOPS 8

struct ipxhdr {
	__u16			ipx_checksum __attribute__ ((packed));
#define IPX_NO_CHECKSUM	0xFFFF
	__be16			ipx_pktsize __attribute__ ((packed));
	__u8			ipx_tctrl;
	__u8			ipx_type;
#define IPX_TYPE_UNKNOWN	0x00
#define IPX_TYPE_RIP		0x01	/* may also be 0 */
#define IPX_TYPE_SAP		0x04	/* may also be 0 */
#define IPX_TYPE_SPX		0x05	/* SPX protocol */
#define IPX_TYPE_NCP		0x11	/* $lots for docs on this (SPIT) */
#define IPX_TYPE_PPROP		0x14	/* complicated flood fill brdcast */
	struct ipx_address	ipx_dest __attribute__ ((packed));
	struct ipx_address	ipx_source __attribute__ ((packed));
};

static __inline__ struct ipxhdr *ipx_hdr(struct sk_buff *skb)
{
	return (struct ipxhdr *)skb->h.raw;
}

struct ipx_interface {
	/* IPX address */
	__be32			if_netnum;
	unsigned char		if_node[IPX_NODE_LEN];
	atomic_t		refcnt;

	/* physical device info */
	struct net_device	*if_dev;
	struct datalink_proto	*if_dlink;
	__be16			if_dlink_type;

	/* socket support */
	unsigned short		if_sknum;
	struct hlist_head	if_sklist;
	spinlock_t		if_sklist_lock;

	/* administrative overhead */
	int			if_ipx_offset;
	unsigned char		if_internal;
	unsigned char		if_primary;
	
	struct list_head	node; /* node in ipx_interfaces list */
};

struct ipx_route {
	__be32			ir_net;
	struct ipx_interface	*ir_intrfc;
	unsigned char		ir_routed;
	unsigned char		ir_router_node[IPX_NODE_LEN];
	struct list_head	node; /* node in ipx_routes list */
	atomic_t		refcnt;
};

#ifdef __KERNEL__
struct ipx_cb {
	u8	ipx_tctrl;
	__be32	ipx_dest_net;
	__be32	ipx_source_net;
	struct {
		__be32 netnum;
		int index;
	} last_hop;
};

#include <net/sock.h>

struct ipx_sock {
	/* struct sock has to be the first member of ipx_sock */
	struct sock		sk;
	struct ipx_address	dest_addr;
	struct ipx_interface	*intrfc;
	__be16			port;
#ifdef CONFIG_IPX_INTERN
	unsigned char		node[IPX_NODE_LEN];
#endif
	unsigned short		type;
	/*
	 * To handle special ncp connection-handling sockets for mars_nwe,
 	 * the connection number must be stored in the socket.
	 */
	unsigned short		ipx_ncp_conn;
};

static inline struct ipx_sock *ipx_sk(struct sock *sk)
{
	return (struct ipx_sock *)sk;
}

#define IPX_SKB_CB(__skb) ((struct ipx_cb *)&((__skb)->cb[0]))
#endif

#define IPX_MIN_EPHEMERAL_SOCKET	0x4000
#define IPX_MAX_EPHEMERAL_SOCKET	0x7fff

extern struct list_head ipx_routes;
extern rwlock_t ipx_routes_lock;

extern struct list_head ipx_interfaces;
extern struct ipx_interface *ipx_interfaces_head(void);
extern spinlock_t ipx_interfaces_lock;

extern struct ipx_interface *ipx_primary_net;

extern int ipx_proc_init(void);
extern void ipx_proc_exit(void);

extern const char *ipx_frame_name(__be16);
extern const char *ipx_device_name(struct ipx_interface *intrfc);

static __inline__ void ipxitf_hold(struct ipx_interface *intrfc)
{
	atomic_inc(&intrfc->refcnt);
}

extern void ipxitf_down(struct ipx_interface *intrfc);

static __inline__ void ipxitf_put(struct ipx_interface *intrfc)
{
	if (atomic_dec_and_test(&intrfc->refcnt))
		ipxitf_down(intrfc);
}

static __inline__ void ipxrtr_hold(struct ipx_route *rt)
{
	        atomic_inc(&rt->refcnt);
}

static __inline__ void ipxrtr_put(struct ipx_route *rt)
{
	        if (atomic_dec_and_test(&rt->refcnt))
			                kfree(rt);
}
#endif /* _NET_INET_IPX_H_ */