[mirror_ubuntu-focal-kernel.git] / include / net / dn_route.h

/* SPDX-License-Identifier: GPL-2.0-or-later */
#ifndef _NET_DN_ROUTE_H
#define _NET_DN_ROUTE_H

/******************************************************************************
    (c) 1995-1998 E.M. Serrat		emserrat@geocities.com
    
*******************************************************************************/

struct sk_buff *dn_alloc_skb(struct sock *sk, int size, gfp_t pri);
int dn_route_output_sock(struct dst_entry __rcu **pprt, struct flowidn *,
			 struct sock *sk, int flags);
int dn_cache_dump(struct sk_buff *skb, struct netlink_callback *cb);
void dn_rt_cache_flush(int delay);
int dn_route_rcv(struct sk_buff *skb, struct net_device *dev,
		 struct packet_type *pt, struct net_device *orig_dev);

/* Masks for flags field */
#define DN_RT_F_PID 0x07 /* Mask for packet type                      */
#define DN_RT_F_PF  0x80 /* Padding Follows                           */
#define DN_RT_F_VER 0x40 /* Version =0 discard packet if ==1          */
#define DN_RT_F_IE  0x20 /* Intra Ethernet, Reserved in short pkt     */
#define DN_RT_F_RTS 0x10 /* Packet is being returned to sender        */
#define DN_RT_F_RQR 0x08 /* Return packet to sender upon non-delivery */

/* Mask for types of routing packets */
#define DN_RT_PKT_MSK   0x06
/* Types of routing packets */
#define DN_RT_PKT_SHORT 0x02 /* Short routing packet */
#define DN_RT_PKT_LONG  0x06 /* Long routing packet  */

/* Mask for control/routing selection */
#define DN_RT_PKT_CNTL  0x01 /* Set to 1 if a control packet  */
/* Types of control packets */
#define DN_RT_CNTL_MSK  0x0f /* Mask for control packets      */
#define DN_RT_PKT_INIT  0x01 /* Initialisation packet         */
#define DN_RT_PKT_VERI  0x03 /* Verification Message          */
#define DN_RT_PKT_HELO  0x05 /* Hello and Test Message        */
#define DN_RT_PKT_L1RT  0x07 /* Level 1 Routing Message       */
#define DN_RT_PKT_L2RT  0x09 /* Level 2 Routing Message       */
#define DN_RT_PKT_ERTH  0x0b /* Ethernet Router Hello         */
#define DN_RT_PKT_EEDH  0x0d /* Ethernet EndNode Hello        */

/* Values for info field in hello message */
#define DN_RT_INFO_TYPE 0x03 /* Type mask                     */
#define DN_RT_INFO_L1RT 0x02 /* L1 Router                     */
#define DN_RT_INFO_L2RT 0x01 /* L2 Router                     */
#define DN_RT_INFO_ENDN 0x03 /* EndNode                       */
#define DN_RT_INFO_VERI 0x04 /* Verification Reqd.            */
#define DN_RT_INFO_RJCT 0x08 /* Reject Flag, Reserved         */
#define DN_RT_INFO_VFLD 0x10 /* Verification Failed, Reserved */
#define DN_RT_INFO_NOML 0x20 /* No Multicast traffic accepted */
#define DN_RT_INFO_BLKR 0x40 /* Blocking Requested            */

/*
 * The fl structure is what we used to look up the route.
 * The rt_saddr & rt_daddr entries are the same as key.saddr & key.daddr
 * except for local input routes, where the rt_saddr = fl.fld_dst and
 * rt_daddr = fl.fld_src to allow the route to be used for returning
 * packets to the originating host.
 */
struct dn_route {
	struct dst_entry dst;
	struct dn_route __rcu *dn_next;

	struct neighbour *n;

	struct flowidn fld;

	__le16 rt_saddr;
	__le16 rt_daddr;
	__le16 rt_gateway;
	__le16 rt_local_src;	/* Source used for forwarding packets */
	__le16 rt_src_map;
	__le16 rt_dst_map;

	unsigned int rt_flags;
	unsigned int rt_type;
};

static inline bool dn_is_input_route(struct dn_route *rt)
{
	return rt->fld.flowidn_iif != 0;
}

static inline bool dn_is_output_route(struct dn_route *rt)
{
	return rt->fld.flowidn_iif == 0;
}

void dn_route_init(void);
void dn_route_cleanup(void);

#include <net/sock.h>
#include <linux/if_arp.h>

static inline void dn_rt_send(struct sk_buff *skb)
{
	dev_queue_xmit(skb);
}

static inline void dn_rt_finish_output(struct sk_buff *skb, char *dst, char *src)
{
	struct net_device *dev = skb->dev;

	if ((dev->type != ARPHRD_ETHER) && (dev->type != ARPHRD_LOOPBACK))
		dst = NULL;

	if (dev_hard_header(skb, dev, ETH_P_DNA_RT, dst, src, skb->len) >= 0)
		dn_rt_send(skb);
	else
		kfree_skb(skb);
}

#endif /* _NET_DN_ROUTE_H */
Commit	Line	Data
fd9871f7	1	/* SPDX-License-Identifier: GPL-2.0-or-later */
1da177e4 LT	2	#ifndef _NET_DN_ROUTE_H
	3	#define _NET_DN_ROUTE_H
	4
	5	/******************************************************************************
	6	(c) 1995-1998 E.M. Serrat emserrat@geocities.com
	7
1da177e4 LT	8	*******************************************************************************/
1da177e4 LT	9
59ddd965 JP	10	struct sk_buff dn_alloc_skb(struct sock sk, int size, gfp_t pri);
	11	int dn_route_output_sock(struct dst_entry __rcu *pprt, struct flowidn ,
	12	struct sock *sk, int flags);
	13	int dn_cache_dump(struct sk_buff skb, struct netlink_callback cb);
	14	void dn_rt_cache_flush(int delay);
f56b8bf6 RK	15	int dn_route_rcv(struct sk_buff skb, struct net_device dev,
f56b8bf6 RK	16	struct packet_type pt, struct net_device orig_dev);
1da177e4 LT	17
	18	/* Masks for flags field */
	19	#define DN_RT_F_PID 0x07 /* Mask for packet type */
	20	#define DN_RT_F_PF 0x80 /* Padding Follows */
	21	#define DN_RT_F_VER 0x40 /* Version =0 discard packet if ==1 */
	22	#define DN_RT_F_IE 0x20 /* Intra Ethernet, Reserved in short pkt */
	23	#define DN_RT_F_RTS 0x10 /* Packet is being returned to sender */
	24	#define DN_RT_F_RQR 0x08 /* Return packet to sender upon non-delivery */
	25
	26	/* Mask for types of routing packets */
	27	#define DN_RT_PKT_MSK 0x06
	28	/* Types of routing packets */
	29	#define DN_RT_PKT_SHORT 0x02 /* Short routing packet */
	30	#define DN_RT_PKT_LONG 0x06 /* Long routing packet */
	31
	32	/* Mask for control/routing selection */
	33	#define DN_RT_PKT_CNTL 0x01 /* Set to 1 if a control packet */
	34	/* Types of control packets */
	35	#define DN_RT_CNTL_MSK 0x0f /* Mask for control packets */
	36	#define DN_RT_PKT_INIT 0x01 /* Initialisation packet */
	37	#define DN_RT_PKT_VERI 0x03 /* Verification Message */
	38	#define DN_RT_PKT_HELO 0x05 /* Hello and Test Message */
	39	#define DN_RT_PKT_L1RT 0x07 /* Level 1 Routing Message */
	40	#define DN_RT_PKT_L2RT 0x09 /* Level 2 Routing Message */
	41	#define DN_RT_PKT_ERTH 0x0b /* Ethernet Router Hello */
	42	#define DN_RT_PKT_EEDH 0x0d /* Ethernet EndNode Hello */
	43
	44	/* Values for info field in hello message */
	45	#define DN_RT_INFO_TYPE 0x03 /* Type mask */
	46	#define DN_RT_INFO_L1RT 0x02 /* L1 Router */
	47	#define DN_RT_INFO_L2RT 0x01 /* L2 Router */
	48	#define DN_RT_INFO_ENDN 0x03 /* EndNode */
	49	#define DN_RT_INFO_VERI 0x04 /* Verification Reqd. */
	50	#define DN_RT_INFO_RJCT 0x08 /* Reject Flag, Reserved */
	51	#define DN_RT_INFO_VFLD 0x10 /* Verification Failed, Reserved */
	52	#define DN_RT_INFO_NOML 0x20 /* No Multicast traffic accepted */
	53	#define DN_RT_INFO_BLKR 0x40 /* Blocking Requested */
	54
	55	/*
	56	* The fl structure is what we used to look up the route.
	57	* The rt_saddr & rt_daddr entries are the same as key.saddr & key.daddr
	58	* except for local input routes, where the rt_saddr = fl.fld_dst and
	59	* rt_daddr = fl.fld_src to allow the route to be used for returning
	60	* packets to the originating host.
	61	*/
	62	struct dn_route {
d8d1f30b	63	struct dst_entry dst;
fe736e77	64	struct dn_route __rcu *dn_next;
1da177e4	65
fccd7d5c DM	66	struct neighbour *n;
fccd7d5c DM	67
bef55aeb	68	struct flowidn fld;
0c195c3f	69
c4ea94ab SW	70	__le16 rt_saddr;
	71	__le16 rt_daddr;
	72	__le16 rt_gateway;
	73	__le16 rt_local_src; /* Source used for forwarding packets */
	74	__le16 rt_src_map;
	75	__le16 rt_dst_map;
1da177e4	76
95c96174 ED	77	unsigned int rt_flags;
95c96174 ED	78	unsigned int rt_type;
1da177e4 LT	79	};
1da177e4 LT	80
c7537967 DM	81	static inline bool dn_is_input_route(struct dn_route *rt)
c7537967 DM	82	{
bef55aeb	83	return rt->fld.flowidn_iif != 0;
c7537967 DM	84	}
	85
	86	static inline bool dn_is_output_route(struct dn_route *rt)
	87	{
bef55aeb	88	return rt->fld.flowidn_iif == 0;
c7537967 DM	89	}
c7537967 DM	90
59ddd965 JP	91	void dn_route_init(void);
59ddd965 JP	92	void dn_route_cleanup(void);
1da177e4 LT	93
	94	#include <net/sock.h>
	95	#include <linux/if_arp.h>
	96
	97	static inline void dn_rt_send(struct sk_buff *skb)
	98	{
	99	dev_queue_xmit(skb);
	100	}
	101
	102	static inline void dn_rt_finish_output(struct sk_buff skb, char dst, char *src)
	103	{
	104	struct net_device *dev = skb->dev;
	105
	106	if ((dev->type != ARPHRD_ETHER) && (dev->type != ARPHRD_LOOPBACK))
	107	dst = NULL;
	108
0c4e8581	109	if (dev_hard_header(skb, dev, ETH_P_DNA_RT, dst, src, skb->len) >= 0)
1da177e4 LT	110	dn_rt_send(skb);
	111	else
	112	kfree_skb(skb);
	113	}
	114
	115	#endif /* _NET_DN_ROUTE_H */