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 18extern struct sk_buff *dn_alloc_skb(struct sock *sk, int size, int pri); 19extern int dn_route_output(struct dst_entry **pprt, dn_address dst, dn_address src, int flags); 20extern int dn_cache_dump(struct sk_buff *skb, struct netlink_callback *cb); 21extern int dn_cache_getroute(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg); 22extern void dn_rt_cache_flush(int delay); 23 24/* Masks for flags field */ 25#define DN_RT_F_PID 0x07 /* Mask for packet type */ 26#define DN_RT_F_PF 0x80 /* Padding Follows */ 27#define DN_RT_F_VER 0x40 /* Version =0 discard packet if ==1 */ 28#define DN_RT_F_IE 0x20 /* Intra Ethernet, Reserved in short pkt */ 29#define DN_RT_F_RTS 0x10 /* Packet is being returned to sender */ 30#define DN_RT_F_RQR 0x08 /* Return packet to sender upon non-delivery */ 31 32/* Mask for types of routing packets */ 33#define DN_RT_PKT_MSK 0x06 34/* Types of routing packets */ 35#define DN_RT_PKT_SHORT 0x02 /* Short routing packet */ 36#define DN_RT_PKT_LONG 0x06 /* Long routing packet */ 37 38/* Mask for control/routing selection */ 39#define DN_RT_PKT_CNTL 0x01 /* Set to 1 if a control packet */ 40/* Types of control packets */ 41#define DN_RT_CNTL_MSK 0x0f /* Mask for control packets */ 42#define DN_RT_PKT_INIT 0x01 /* Initialisation packet */ 43#define DN_RT_PKT_VERI 0x03 /* Verification Message */ 44#define DN_RT_PKT_HELO 0x05 /* Hello and Test Message */ 45#define DN_RT_PKT_L1RT 0x07 /* Level 1 Routing Message */ 46#define DN_RT_PKT_L2RT 0x09 /* Level 2 Routing Message */ 47#define DN_RT_PKT_ERTH 0x0b /* Ethernet Router Hello */ 48#define DN_RT_PKT_EEDH 0x0d /* Ethernet EndNode Hello */ 49 50/* Values for info field in hello message */ 51#define DN_RT_INFO_TYPE 0x03 /* Type mask */ 52#define DN_RT_INFO_L1RT 0x02 /* L1 Router */ 53#define DN_RT_INFO_L2RT 0x01 /* L2 Router */ 54#define DN_RT_INFO_ENDN 0x03 /* EndNode */ 55#define DN_RT_INFO_VERI 0x04 /* Verification Reqd. */ 56#define DN_RT_INFO_RJCT 0x08 /* Reject Flag, Reserved */ 57#define DN_RT_INFO_VFLD 0x10 /* Verification Failed, Reserved */ 58#define DN_RT_INFO_NOML 0x20 /* No Multicast traffic accepted */ 59#define DN_RT_INFO_BLKR 0x40 /* Blocking Requested */ 60 61/* 62 * The key structure is what we used to look up the route. 63 * The rt_saddr & rt_daddr entries are the same as key.saddr & key.daddr 64 * except for local input routes, where the rt_saddr = key.daddr and 65 * rt_daddr = key.saddr to allow the route to be used for returning 66 * packets to the originating host. 67 */ 68struct dn_route { 69 union { 70 struct dst_entry dst; 71 struct dn_route *rt_next; 72 } u; 73 struct { 74 unsigned short saddr; 75 unsigned short daddr; 76 int iif; 77 int oif; 78 u32 fwmark; 79 } key; 80 unsigned short rt_saddr; 81 unsigned short rt_daddr; 82 unsigned char rt_type; 83 unsigned char rt_scope; 84 unsigned char rt_protocol; 85 unsigned char rt_table; 86}; 87 88extern void dn_route_init(void); 89extern void dn_route_cleanup(void); 90 91#include <net/sock.h> 92#include <linux/if_arp.h> 93 94static inline void dn_rt_send(struct sk_buff *skb) 95{ 96 dev_queue_xmit(skb); 97} 98 99static inline void dn_rt_finish_output(struct sk_buff *skb, char *dst) 100{ 101 struct net_device *dev = skb->dev; 102 103 if ((dev->type != ARPHRD_ETHER) && (dev->type != ARPHRD_LOOPBACK)) 104 dst = NULL; 105 106 if (!dev->hard_header || (dev->hard_header(skb, dev, ETH_P_DNA_RT, 107 dst, NULL, skb->len) >= 0)) 108 dn_rt_send(skb); 109 else 110 kfree_skb(skb); 111} 112 113static inline void dn_nsp_send(struct sk_buff *skb) 114{ 115 struct sock *sk = skb->sk; 116 struct dn_scp *scp = &sk->protinfo.dn; 117 struct dst_entry *dst; 118 119 skb->h.raw = skb->data; 120 scp->stamp = jiffies; 121 122 if ((dst = sk->dst_cache) && !dst->obsolete) { 123try_again: 124 skb->dst = dst_clone(dst); 125 dst->output(skb); 126 return; 127 } 128 129 dst_release(xchg(&sk->dst_cache, NULL)); 130 131 if (dn_route_output(&sk->dst_cache, dn_saddr2dn(&scp->peer), dn_saddr2dn(&scp->addr), 0) == 0) { 132 dst = sk->dst_cache; 133 goto try_again; 134 } 135 136 sk->err = EHOSTUNREACH; 137 if (!sk->dead) 138 sk->state_change(sk); 139} 140 141#endif /* _NET_DN_ROUTE_H */ 142