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
18struct 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
29struct 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
45/* From af_ipx.c */
46extern int sysctl_ipx_pprop_broadcasting;
47
48static __inline__ struct ipxhdr *ipx_hdr(struct sk_buff *skb)
49{
50	return (struct ipxhdr *)skb_transport_header(skb);
51}
52
53struct ipx_interface {
54	/* IPX address */
55	__be32			if_netnum;
56	unsigned char		if_node[IPX_NODE_LEN];
57	atomic_t		refcnt;
58
59	/* physical device info */
60	struct net_device	*if_dev;
61	struct datalink_proto	*if_dlink;
62	__be16			if_dlink_type;
63
64	/* socket support */
65	unsigned short		if_sknum;
66	struct hlist_head	if_sklist;
67	spinlock_t		if_sklist_lock;
68
69	/* administrative overhead */
70	int			if_ipx_offset;
71	unsigned char		if_internal;
72	unsigned char		if_primary;
73
74	struct list_head	node; /* node in ipx_interfaces list */
75};
76
77struct ipx_route {
78	__be32			ir_net;
79	struct ipx_interface	*ir_intrfc;
80	unsigned char		ir_routed;
81	unsigned char		ir_router_node[IPX_NODE_LEN];
82	struct list_head	node; /* node in ipx_routes list */
83	atomic_t		refcnt;
84};
85
86struct ipx_cb {
87	u8	ipx_tctrl;
88	__be32	ipx_dest_net;
89	__be32	ipx_source_net;
90	struct {
91		__be32 netnum;
92		int index;
93	} last_hop;
94};
95
96#include <net/sock.h>
97
98struct ipx_sock {
99	/* struct sock has to be the first member of ipx_sock */
100	struct sock		sk;
101	struct ipx_address	dest_addr;
102	struct ipx_interface	*intrfc;
103	__be16			port;
104#ifdef CONFIG_IPX_INTERN
105	unsigned char		node[IPX_NODE_LEN];
106#endif
107	unsigned short		type;
108	/*
109	 * To handle special ncp connection-handling sockets for mars_nwe,
110 	 * the connection number must be stored in the socket.
111	 */
112	unsigned short		ipx_ncp_conn;
113};
114
115static inline struct ipx_sock *ipx_sk(struct sock *sk)
116{
117	return (struct ipx_sock *)sk;
118}
119
120#define IPX_SKB_CB(__skb) ((struct ipx_cb *)&((__skb)->cb[0]))
121
122#define IPX_MIN_EPHEMERAL_SOCKET	0x4000
123#define IPX_MAX_EPHEMERAL_SOCKET	0x7fff
124
125extern struct list_head ipx_routes;
126extern rwlock_t ipx_routes_lock;
127
128extern struct list_head ipx_interfaces;
129struct ipx_interface *ipx_interfaces_head(void);
130extern spinlock_t ipx_interfaces_lock;
131
132extern struct ipx_interface *ipx_primary_net;
133
134int ipx_proc_init(void);
135void ipx_proc_exit(void);
136
137const char *ipx_frame_name(__be16);
138const char *ipx_device_name(struct ipx_interface *intrfc);
139
140static __inline__ void ipxitf_hold(struct ipx_interface *intrfc)
141{
142	atomic_inc(&intrfc->refcnt);
143}
144
145void ipxitf_down(struct ipx_interface *intrfc);
146struct ipx_interface *ipxitf_find_using_net(__be32 net);
147int ipxitf_send(struct ipx_interface *intrfc, struct sk_buff *skb, char *node);
148__be16 ipx_cksum(struct ipxhdr *packet, int length);
149int ipxrtr_add_route(__be32 network, struct ipx_interface *intrfc,
150		     unsigned char *node);
151void ipxrtr_del_routes(struct ipx_interface *intrfc);
152int ipxrtr_route_packet(struct sock *sk, struct sockaddr_ipx *usipx,
153			struct msghdr *msg, size_t len, int noblock);
154int ipxrtr_route_skb(struct sk_buff *skb);
155struct ipx_route *ipxrtr_lookup(__be32 net);
156int ipxrtr_ioctl(unsigned int cmd, void __user *arg);
157
158static __inline__ void ipxitf_put(struct ipx_interface *intrfc)
159{
160	if (atomic_dec_and_test(&intrfc->refcnt))
161		ipxitf_down(intrfc);
162}
163
164static __inline__ void ipxrtr_hold(struct ipx_route *rt)
165{
166	        atomic_inc(&rt->refcnt);
167}
168
169static __inline__ void ipxrtr_put(struct ipx_route *rt)
170{
171	        if (atomic_dec_and_test(&rt->refcnt))
172			                kfree(rt);
173}
174#endif /* _NET_INET_IPX_H_ */
175