1 files changed, 112 insertions, 0 deletions

diff --git a/include/net/dn_route.h b/include/net/dn_route.h
new file mode 100644
index 000000000000..d084721db198
--- /dev/null
+++ b/include/net/dn_route.h
@@ -0,0 +1,112 @@
+#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.
+*******************************************************************************/
+
+extern struct sk_buff *dn_alloc_skb(struct sock *sk, int size, int pri);
+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 */