--- /dev/null
+#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.
+*******************************************************************************/
+
+struct sk_buff *dn_alloc_skb(struct sock *sk, int size, gfp_t pri);
+int dn_route_output_sock(struct dst_entry __rcu **pprt, struct flowidn *,
+ struct sock *sk, int flags);
+int dn_cache_dump(struct sk_buff *skb, struct netlink_callback *cb);
+void dn_rt_cache_flush(int delay);
+int dn_route_rcv(struct sk_buff *skb, struct net_device *dev,
+ struct packet_type *pt, struct net_device *orig_dev);
+
+/* 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;
+}
+
+void dn_route_init(void);
+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 */
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