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Linus Torvalds1da177e2005-04-16 15:20:36 -07001#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
Al Virodd0fc662005-10-07 07:46:04 +010018extern struct sk_buff *dn_alloc_skb(struct sock *sk, int size, gfp_t pri);
Linus Torvalds1da177e2005-04-16 15:20:36 -070019extern int dn_route_output_sock(struct dst_entry **pprt, struct flowi *, struct sock *sk, int flags);
20extern int dn_cache_dump(struct sk_buff *skb, struct netlink_callback *cb);
Linus Torvalds1da177e2005-04-16 15:20:36 -070021extern void dn_rt_cache_flush(int delay);
22
23/* Masks for flags field */
24#define DN_RT_F_PID 0x07 /* Mask for packet type */
25#define DN_RT_F_PF 0x80 /* Padding Follows */
26#define DN_RT_F_VER 0x40 /* Version =0 discard packet if ==1 */
27#define DN_RT_F_IE 0x20 /* Intra Ethernet, Reserved in short pkt */
28#define DN_RT_F_RTS 0x10 /* Packet is being returned to sender */
29#define DN_RT_F_RQR 0x08 /* Return packet to sender upon non-delivery */
30
31/* Mask for types of routing packets */
32#define DN_RT_PKT_MSK 0x06
33/* Types of routing packets */
34#define DN_RT_PKT_SHORT 0x02 /* Short routing packet */
35#define DN_RT_PKT_LONG 0x06 /* Long routing packet */
36
37/* Mask for control/routing selection */
38#define DN_RT_PKT_CNTL 0x01 /* Set to 1 if a control packet */
39/* Types of control packets */
40#define DN_RT_CNTL_MSK 0x0f /* Mask for control packets */
41#define DN_RT_PKT_INIT 0x01 /* Initialisation packet */
42#define DN_RT_PKT_VERI 0x03 /* Verification Message */
43#define DN_RT_PKT_HELO 0x05 /* Hello and Test Message */
44#define DN_RT_PKT_L1RT 0x07 /* Level 1 Routing Message */
45#define DN_RT_PKT_L2RT 0x09 /* Level 2 Routing Message */
46#define DN_RT_PKT_ERTH 0x0b /* Ethernet Router Hello */
47#define DN_RT_PKT_EEDH 0x0d /* Ethernet EndNode Hello */
48
49/* Values for info field in hello message */
50#define DN_RT_INFO_TYPE 0x03 /* Type mask */
51#define DN_RT_INFO_L1RT 0x02 /* L1 Router */
52#define DN_RT_INFO_L2RT 0x01 /* L2 Router */
53#define DN_RT_INFO_ENDN 0x03 /* EndNode */
54#define DN_RT_INFO_VERI 0x04 /* Verification Reqd. */
55#define DN_RT_INFO_RJCT 0x08 /* Reject Flag, Reserved */
56#define DN_RT_INFO_VFLD 0x10 /* Verification Failed, Reserved */
57#define DN_RT_INFO_NOML 0x20 /* No Multicast traffic accepted */
58#define DN_RT_INFO_BLKR 0x40 /* Blocking Requested */
59
60/*
61 * The fl structure is what we used to look up the route.
62 * The rt_saddr & rt_daddr entries are the same as key.saddr & key.daddr
63 * except for local input routes, where the rt_saddr = fl.fld_dst and
64 * rt_daddr = fl.fld_src to allow the route to be used for returning
65 * packets to the originating host.
66 */
67struct dn_route {
Changli Gaod8d1f302010-06-10 23:31:35 -070068 struct dst_entry dst;
Linus Torvalds1da177e2005-04-16 15:20:36 -070069
Eric Dumazet0c195c32007-02-09 16:25:52 -080070 struct flowi fl;
71
Steven Whitehousec4ea94a2006-03-20 22:42:39 -080072 __le16 rt_saddr;
73 __le16 rt_daddr;
74 __le16 rt_gateway;
75 __le16 rt_local_src; /* Source used for forwarding packets */
76 __le16 rt_src_map;
77 __le16 rt_dst_map;
Linus Torvalds1da177e2005-04-16 15:20:36 -070078
79 unsigned rt_flags;
80 unsigned rt_type;
Linus Torvalds1da177e2005-04-16 15:20:36 -070081};
82
David S. Millerc7537962010-11-11 17:07:48 -080083static inline bool dn_is_input_route(struct dn_route *rt)
84{
85 return rt->fl.iif != 0;
86}
87
88static inline bool dn_is_output_route(struct dn_route *rt)
89{
90 return rt->fl.iif == 0;
91}
92
Linus Torvalds1da177e2005-04-16 15:20:36 -070093extern void dn_route_init(void);
94extern void dn_route_cleanup(void);
95
96#include <net/sock.h>
97#include <linux/if_arp.h>
98
99static inline void dn_rt_send(struct sk_buff *skb)
100{
101 dev_queue_xmit(skb);
102}
103
104static inline void dn_rt_finish_output(struct sk_buff *skb, char *dst, char *src)
105{
106 struct net_device *dev = skb->dev;
107
108 if ((dev->type != ARPHRD_ETHER) && (dev->type != ARPHRD_LOOPBACK))
109 dst = NULL;
110
Stephen Hemminger0c4e8582007-10-09 01:36:32 -0700111 if (dev_hard_header(skb, dev, ETH_P_DNA_RT, dst, src, skb->len) >= 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700112 dn_rt_send(skb);
113 else
114 kfree_skb(skb);
115}
116
117#endif /* _NET_DN_ROUTE_H */