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# 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 .
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
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extern struct sk_buff * dn_alloc_skb ( struct sock * sk , int size , unsigned int __nocast pri ) ;
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extern int dn_route_output_sock ( struct dst_entry * * pprt , struct flowi * , struct sock * sk , int flags ) ;
extern int dn_cache_dump ( struct sk_buff * skb , struct netlink_callback * cb ) ;
extern int dn_cache_getroute ( struct sk_buff * skb , struct nlmsghdr * nlh , void * arg ) ;
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 {
union {
struct dst_entry dst ;
struct dn_route * rt_next ;
} u ;
__u16 rt_saddr ;
__u16 rt_daddr ;
__u16 rt_gateway ;
__u16 rt_local_src ; /* Source used for forwarding packets */
__u16 rt_src_map ;
__u16 rt_dst_map ;
unsigned rt_flags ;
unsigned rt_type ;
struct flowi fl ;
} ;
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 | | ( 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 */
