include/net/ipx.h

#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>

struct ipx_address {
	__u32   net;
	__u8    node[IPX_NODE_LEN]; 
	__u16   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
	__u16           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 */
	__u32           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;
	unsigned short	if_dlink_type;

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

	/* administrative overhead */
	int		if_ipx_offset;
	unsigned char	if_internal;
	unsigned char	if_primary;
	
	struct ipx_interface	*if_next;
};

struct ipx_route {
	__u32         ir_net;
	struct ipx_interface	*ir_intrfc;
	unsigned char ir_routed;
	unsigned char ir_router_node[IPX_NODE_LEN];
	struct ipx_route	*ir_next;
	atomic_t      refcnt;
};

#ifdef __KERNEL__
struct ipx_cb {
	u8 ipx_tctrl;
	u32 ipx_dest_net;
	u32 ipx_source_net;
	struct {
		u32 netnum;
		int index;
	} last_hop;
};

struct ipx_opt {
	struct ipx_address	dest_addr;
	struct ipx_interface	*intrfc;
	unsigned short	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;
};

#define ipx_sk(__sk) ((struct ipx_opt *)(__sk)->protinfo)
#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 ipx_route *ipx_routes;
extern rwlock_t ipx_routes_lock;

extern struct ipx_interface *ipx_interfaces;
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(unsigned short);
extern const char *ipx_device_name(struct ipx_interface *intrfc);
#endif /* def _NET_INET_IPX_H_ */