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linux
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);
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 fl 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 = fl.fld_dst and
65 * rt_daddr = fl.fld_src to allow the route to be used for returning
66 * packets to the originating host.
67 */
68struct dn_route {
69 struct dst_entry dst;
70
71 struct neighbour *n;
72
73 struct flowidn fld;
74
75 __le16 rt_saddr;
76 __le16 rt_daddr;
77 __le16 rt_gateway;
78 __le16 rt_local_src; /* Source used for forwarding packets */
79 __le16 rt_src_map;
80 __le16 rt_dst_map;
81
82 unsigned int rt_flags;
83 unsigned int rt_type;
84};
85
86static inline bool dn_is_input_route(struct dn_route *rt)
87{
88 return rt->fld.flowidn_iif != 0;
89}
90
91static inline bool dn_is_output_route(struct dn_route *rt)
92{
93 return rt->fld.flowidn_iif == 0;
94}
95
96void dn_route_init(void);
97void dn_route_cleanup(void);
98
99#include <net/sock.h>
100#include <linux/if_arp.h>
101
102static inline void dn_rt_send(struct sk_buff *skb)
103{
104 dev_queue_xmit(skb);
105}
106
107static inline void dn_rt_finish_output(struct sk_buff *skb, char *dst, char *src)
108{
109 struct net_device *dev = skb->dev;
110
111 if ((dev->type != ARPHRD_ETHER) && (dev->type != ARPHRD_LOOPBACK))
112 dst = NULL;
113
114 if (dev_hard_header(skb, dev, ETH_P_DNA_RT, dst, src, skb->len) >= 0)
115 dn_rt_send(skb);
116 else
117 kfree_skb(skb);
118}
119
120#endif /* _NET_DN_ROUTE_H */