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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
17struct 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
28struct ipxhdr {
29 __be16 ipx_checksum __attribute__ ((packed));
30#define IPX_NO_CHECKSUM __constant_htons(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
44static __inline__ struct ipxhdr *ipx_hdr(struct sk_buff *skb)
45{
46 return (struct ipxhdr *)skb->h.raw;
47}
48
49struct 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
73struct 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__
83struct 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
95struct 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
112static 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
123extern struct list_head ipx_routes;
124extern rwlock_t ipx_routes_lock;
125
126extern struct list_head ipx_interfaces;
127extern struct ipx_interface *ipx_interfaces_head(void);
128extern spinlock_t ipx_interfaces_lock;
129
130extern struct ipx_interface *ipx_primary_net;
131
132extern int ipx_proc_init(void);
133extern void ipx_proc_exit(void);
134
135extern const char *ipx_frame_name(__be16);
136extern const char *ipx_device_name(struct ipx_interface *intrfc);
137
138static __inline__ void ipxitf_hold(struct ipx_interface *intrfc)
139{
140 atomic_inc(&intrfc->refcnt);
141}
142
143extern void ipxitf_down(struct ipx_interface *intrfc);
144
145static __inline__ void ipxitf_put(struct ipx_interface *intrfc)
146{
147 if (atomic_dec_and_test(&intrfc->refcnt))
148 ipxitf_down(intrfc);
149}
150
151static __inline__ void ipxrtr_hold(struct ipx_route *rt)
152{
153 atomic_inc(&rt->refcnt);
154}
155
156static __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_ */