mirror of https://gitee.com/openkylin/linux.git
120 lines
4.3 KiB
C
120 lines
4.3 KiB
C
#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.
|
|
*******************************************************************************/
|
|
|
|
extern struct sk_buff *dn_alloc_skb(struct sock *sk, int size, gfp_t pri);
|
|
extern int dn_route_output_sock(struct dst_entry __rcu **pprt, struct flowidn *, struct sock *sk, int flags);
|
|
extern int dn_cache_dump(struct sk_buff *skb, struct netlink_callback *cb);
|
|
extern void dn_rt_cache_flush(int delay);
|
|
|
|
/* 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;
|
|
}
|
|
|
|
extern void dn_route_init(void);
|
|
extern 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 */
|