LXR linux/include/net/dn

   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
  18struct sk_buff *dn_alloc_skb(struct sock *sk, int size, gfp_t pri);
  19int dn_route_output_sock(struct dst_entry __rcu **pprt, struct flowidn *,
  20                         struct sock *sk, int flags);
  21int dn_cache_dump(struct sk_buff *skb, struct netlink_callback *cb);
  22void dn_rt_cache_flush(int delay);
  23int dn_route_rcv(struct sk_buff *skb, struct net_device *dev,
  24                 struct packet_type *pt, struct net_device *orig_dev);
  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 */
  70struct dn_route {
  71        struct dst_entry dst;
  72        struct dn_route __rcu *dn_next;
  73
  74        struct neighbour *n;
  75
  76        struct flowidn fld;
  77
  78        __le16 rt_saddr;
  79        __le16 rt_daddr;
  80        __le16 rt_gateway;
  81        __le16 rt_local_src;    /* Source used for forwarding packets */
  82        __le16 rt_src_map;
  83        __le16 rt_dst_map;
  84
  85        unsigned int rt_flags;
  86        unsigned int rt_type;
  87};
  88
  89static inline bool dn_is_input_route(struct dn_route *rt)
  90{
  91        return rt->fld.flowidn_iif != 0;
  92}
  93
  94static inline bool dn_is_output_route(struct dn_route *rt)
  95{
  96        return rt->fld.flowidn_iif == 0;
  97}
  98
  99void dn_route_init(void);
 100void dn_route_cleanup(void);
 101
 102#include <net/sock.h>
 103#include <linux/if_arp.h>
 104
 105static inline void dn_rt_send(struct sk_buff *skb)
 106{
 107        dev_queue_xmit(skb);
 108}
 109
 110static inline void dn_rt_finish_output(struct sk_buff *skb, char *dst, char *src)
 111{
 112        struct net_device *dev = skb->dev;
 113
 114        if ((dev->type != ARPHRD_ETHER) && (dev->type != ARPHRD_LOOPBACK))
 115                dst = NULL;
 116
 117        if (dev_hard_header(skb, dev, ETH_P_DNA_RT, dst, src, skb->len) >= 0)
 118                dn_rt_send(skb);
 119        else
 120                kfree_skb(skb);
 121}
 122
 123#endif /* _NET_DN_ROUTE_H */
 124