[linux.git] / 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>
#include <linux/list.h>
#include <linux/slab.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 {
	__be16			ipx_checksum __packed;
#define IPX_NO_CHECKSUM	cpu_to_be16(0xFFFF)
	__be16			ipx_pktsize __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 __packed;
	struct ipx_address	ipx_source __packed;
};

/* From af_ipx.c */
extern int sysctl_ipx_pprop_broadcasting;

static __inline__ struct ipxhdr *ipx_hdr(struct sk_buff *skb)
{
	return (struct ipxhdr *)skb_transport_header(skb);
}

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;
};

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]))

#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;
struct ipx_interface *ipx_interfaces_head(void);
extern spinlock_t ipx_interfaces_lock;

extern struct ipx_interface *ipx_primary_net;

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

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

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

void ipxitf_down(struct ipx_interface *intrfc);
struct ipx_interface *ipxitf_find_using_net(__be32 net);
int ipxitf_send(struct ipx_interface *intrfc, struct sk_buff *skb, char *node);
__be16 ipx_cksum(struct ipxhdr *packet, int length);
int ipxrtr_add_route(__be32 network, struct ipx_interface *intrfc,
		     unsigned char *node);
void ipxrtr_del_routes(struct ipx_interface *intrfc);
int ipxrtr_route_packet(struct sock *sk, struct sockaddr_ipx *usipx,
			struct msghdr *msg, size_t len, int noblock);
int ipxrtr_route_skb(struct sk_buff *skb);
struct ipx_route *ipxrtr_lookup(__be32 net);
int ipxrtr_ioctl(unsigned int cmd, void __user *arg);

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_ */
Commit	Line	Data
1da177e4 LT	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>
5a0e3ad6	16	#include <linux/slab.h>
1da177e4 LT	17
1da177e4 LT	18	struct ipx_address {
4833ed09	19	__be32 net;
1da177e4	20	__u8 node[IPX_NODE_LEN];
4833ed09	21	__be16 sock;
1da177e4 LT	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 {
bc10502d	30	__be16 ipx_checksum __packed;
f3a7c66b	31	#define IPX_NO_CHECKSUM cpu_to_be16(0xFFFF)
bc10502d	32	__be16 ipx_pktsize __packed;
1da177e4 LT	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 */
bc10502d ED	41	struct ipx_address ipx_dest __packed;
bc10502d ED	42	struct ipx_address ipx_source __packed;
1da177e4 LT	43	};
1da177e4 LT	44
5e96d788 FF	45	/* From af_ipx.c */
	46	extern int sysctl_ipx_pprop_broadcasting;
	47
1da177e4 LT	48	static __inline__ struct ipxhdr ipx_hdr(struct sk_buff skb)
1da177e4 LT	49	{
9c70220b	50	return (struct ipxhdr *)skb_transport_header(skb);
1da177e4 LT	51	}
	52
	53	struct ipx_interface {
	54	/* IPX address */
4833ed09	55	__be32 if_netnum;
1da177e4 LT	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;
4833ed09	62	__be16 if_dlink_type;
1da177e4 LT	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
	77	struct ipx_route {
4833ed09	78	__be32 ir_net;
1da177e4 LT	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
1da177e4 LT	86	struct ipx_cb {
1da177e4 LT	87	u8 ipx_tctrl;
4833ed09 AV	88	__be32 ipx_dest_net;
4833ed09 AV	89	__be32 ipx_source_net;
1da177e4	90	struct {
4833ed09	91	__be32 netnum;
1da177e4 LT	92	int index;
	93	} last_hop;
	94	};
	95
	96	#include <net/sock.h>
	97
	98	struct 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;
4833ed09	103	__be16 port;
1da177e4 LT	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
	115	static 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]))
1da177e4 LT	121
	122	#define IPX_MIN_EPHEMERAL_SOCKET 0x4000
	123	#define IPX_MAX_EPHEMERAL_SOCKET 0x7fff
	124
	125	extern struct list_head ipx_routes;
	126	extern rwlock_t ipx_routes_lock;
	127
	128	extern struct list_head ipx_interfaces;
9d03626a	129	struct ipx_interface *ipx_interfaces_head(void);
1da177e4 LT	130	extern spinlock_t ipx_interfaces_lock;
	131
	132	extern struct ipx_interface *ipx_primary_net;
	133
9d03626a JP	134	int ipx_proc_init(void);
9d03626a JP	135	void ipx_proc_exit(void);
1da177e4	136
9d03626a JP	137	const char *ipx_frame_name(__be16);
9d03626a JP	138	const char ipx_device_name(struct ipx_interface intrfc);
1da177e4 LT	139
	140	static __inline__ void ipxitf_hold(struct ipx_interface *intrfc)
	141	{
	142	atomic_inc(&intrfc->refcnt);
	143	}
	144
9d03626a	145	void ipxitf_down(struct ipx_interface *intrfc);
493cc5e5 RK	146	struct ipx_interface *ipxitf_find_using_net(__be32 net);
	147	int ipxitf_send(struct ipx_interface intrfc, struct sk_buff skb, char *node);
	148	__be16 ipx_cksum(struct ipxhdr *packet, int length);
578efbc1 RK	149	int ipxrtr_add_route(__be32 network, struct ipx_interface *intrfc,
	150	unsigned char *node);
	151	void ipxrtr_del_routes(struct ipx_interface *intrfc);
	152	int ipxrtr_route_packet(struct sock sk, struct sockaddr_ipx usipx,
e1693718	153	struct msghdr *msg, size_t len, int noblock);
578efbc1 RK	154	int ipxrtr_route_skb(struct sk_buff *skb);
	155	struct ipx_route *ipxrtr_lookup(__be32 net);
	156	int ipxrtr_ioctl(unsigned int cmd, void __user *arg);
1da177e4 LT	157
	158	static __inline__ void ipxitf_put(struct ipx_interface *intrfc)
	159	{
	160	if (atomic_dec_and_test(&intrfc->refcnt))
	161	ipxitf_down(intrfc);
	162	}
	163
	164	static __inline__ void ipxrtr_hold(struct ipx_route *rt)
	165	{
	166	atomic_inc(&rt->refcnt);
	167	}
	168
	169	static __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_ */