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 73 struct neighbour *n; 74 75 struct flowidn fld; 76 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; 83 84 unsigned int rt_flags; 85 unsigned int rt_type; 86}; 87 88static inline bool dn_is_input_route(struct dn_route *rt) 89{ 90 return rt->fld.flowidn_iif != 0; 91} 92 93static inline bool dn_is_output_route(struct dn_route *rt) 94{ 95 return rt->fld.flowidn_iif == 0; 96} 97 98void dn_route_init(void); 99void dn_route_cleanup(void); 100 101#include <net/sock.h> 102#include <linux/if_arp.h> 103 104static inline void dn_rt_send(struct sk_buff *skb) 105{ 106 dev_queue_xmit(skb); 107} 108 109static 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; 115 116 if (dev_hard_header(skb, dev, ETH_P_DNA_RT, dst, src, skb->len) >= 0) 117 dn_rt_send(skb); 118 else 119 kfree_skb(skb); 120} 121 122#endif /* _NET_DN_ROUTE_H */ 123