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

#ifndef _NET_DN_ROUTE_H
#define _NET_DN_ROUTE_H

/******************************************************************************
    (c) 1995-1998 E.M. Serrat		emserrat@geocities.com
    
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2 of the License, or
    any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.
*******************************************************************************/

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 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
1da177e4 LT	1	#ifndef _NET_DN_ROUTE_H
	2	#define _NET_DN_ROUTE_H
	3
	4	/******************************************************************************
	5	(c) 1995-1998 E.M. Serrat emserrat@geocities.com
	6
	7	This program is free software; you can redistribute it and/or modify
	8	it under the terms of the GNU General Public License as published by
	9	the Free Software Foundation; either version 2 of the License, or
	10	any later version.
	11
	12	This program is distributed in the hope that it will be useful,
	13	but WITHOUT ANY WARRANTY; without even the implied warranty of
	14	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	15	GNU General Public License for more details.
	16	*******************************************************************************/
	17
59ddd965 JP	18	struct sk_buff dn_alloc_skb(struct sock sk, int size, gfp_t pri);
	19	int dn_route_output_sock(struct dst_entry __rcu *pprt, struct flowidn ,
	20	struct sock *sk, int flags);
	21	int dn_cache_dump(struct sk_buff skb, struct netlink_callback cb);
	22	void dn_rt_cache_flush(int delay);
f56b8bf6 RK	23	int dn_route_rcv(struct sk_buff skb, struct net_device dev,
f56b8bf6 RK	24	struct packet_type pt, struct net_device orig_dev);
1da177e4 LT	25
	26	/* Masks for flags field */
	27	#define DN_RT_F_PID 0x07 /* Mask for packet type */
	28	#define DN_RT_F_PF 0x80 /* Padding Follows */
	29	#define DN_RT_F_VER 0x40 /* Version =0 discard packet if ==1 */
	30	#define DN_RT_F_IE 0x20 /* Intra Ethernet, Reserved in short pkt */
	31	#define DN_RT_F_RTS 0x10 /* Packet is being returned to sender */
	32	#define DN_RT_F_RQR 0x08 /* Return packet to sender upon non-delivery */
	33
	34	/* Mask for types of routing packets */
	35	#define DN_RT_PKT_MSK 0x06
	36	/* Types of routing packets */
	37	#define DN_RT_PKT_SHORT 0x02 /* Short routing packet */
	38	#define DN_RT_PKT_LONG 0x06 /* Long routing packet */
	39
	40	/* Mask for control/routing selection */
	41	#define DN_RT_PKT_CNTL 0x01 /* Set to 1 if a control packet */
	42	/* Types of control packets */
	43	#define DN_RT_CNTL_MSK 0x0f /* Mask for control packets */
	44	#define DN_RT_PKT_INIT 0x01 /* Initialisation packet */
	45	#define DN_RT_PKT_VERI 0x03 /* Verification Message */
	46	#define DN_RT_PKT_HELO 0x05 /* Hello and Test Message */
	47	#define DN_RT_PKT_L1RT 0x07 /* Level 1 Routing Message */
	48	#define DN_RT_PKT_L2RT 0x09 /* Level 2 Routing Message */
	49	#define DN_RT_PKT_ERTH 0x0b /* Ethernet Router Hello */
	50	#define DN_RT_PKT_EEDH 0x0d /* Ethernet EndNode Hello */
	51
	52	/* Values for info field in hello message */
	53	#define DN_RT_INFO_TYPE 0x03 /* Type mask */
	54	#define DN_RT_INFO_L1RT 0x02 /* L1 Router */
	55	#define DN_RT_INFO_L2RT 0x01 /* L2 Router */
	56	#define DN_RT_INFO_ENDN 0x03 /* EndNode */
	57	#define DN_RT_INFO_VERI 0x04 /* Verification Reqd. */
	58	#define DN_RT_INFO_RJCT 0x08 /* Reject Flag, Reserved */
	59	#define DN_RT_INFO_VFLD 0x10 /* Verification Failed, Reserved */
	60	#define DN_RT_INFO_NOML 0x20 /* No Multicast traffic accepted */
	61	#define DN_RT_INFO_BLKR 0x40 /* Blocking Requested */
	62
	63	/*
	64	* The fl structure is what we used to look up the route.
	65	* The rt_saddr & rt_daddr entries are the same as key.saddr & key.daddr
	66	* except for local input routes, where the rt_saddr = fl.fld_dst and
	67	* rt_daddr = fl.fld_src to allow the route to be used for returning
	68	* packets to the originating host.
	69	*/
	70	struct dn_route {
d8d1f30b	71	struct dst_entry dst;
1da177e4	72
fccd7d5c DM	73	struct neighbour *n;
fccd7d5c DM	74
bef55aeb	75	struct flowidn fld;
0c195c3f	76
c4ea94ab SW	77	__le16 rt_saddr;
	78	__le16 rt_daddr;
	79	__le16 rt_gateway;
	80	__le16 rt_local_src; /* Source used for forwarding packets */
	81	__le16 rt_src_map;
	82	__le16 rt_dst_map;
1da177e4	83
95c96174 ED	84	unsigned int rt_flags;
95c96174 ED	85	unsigned int rt_type;
1da177e4 LT	86	};
1da177e4 LT	87
c7537967 DM	88	static inline bool dn_is_input_route(struct dn_route *rt)
c7537967 DM	89	{
bef55aeb	90	return rt->fld.flowidn_iif != 0;
c7537967 DM	91	}
	92
	93	static inline bool dn_is_output_route(struct dn_route *rt)
	94	{
bef55aeb	95	return rt->fld.flowidn_iif == 0;
c7537967 DM	96	}
c7537967 DM	97
59ddd965 JP	98	void dn_route_init(void);
59ddd965 JP	99	void dn_route_cleanup(void);
1da177e4 LT	100
	101	#include <net/sock.h>
	102	#include <linux/if_arp.h>
	103
	104	static inline void dn_rt_send(struct sk_buff *skb)
	105	{
	106	dev_queue_xmit(skb);
	107	}
	108
	109	static inline void dn_rt_finish_output(struct sk_buff skb, char dst, char *src)
	110	{
	111	struct net_device *dev = skb->dev;
	112
	113	if ((dev->type != ARPHRD_ETHER) && (dev->type != ARPHRD_LOOPBACK))
	114	dst = NULL;
	115
0c4e8581	116	if (dev_hard_header(skb, dev, ETH_P_DNA_RT, dst, src, skb->len) >= 0)
1da177e4 LT	117	dn_rt_send(skb);
	118	else
	119	kfree_skb(skb);
	120	}
	121
	122	#endif /* _NET_DN_ROUTE_H */