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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 | ||
18 | extern struct sk_buff *dn_alloc_skb(struct sock *sk, int size, int pri); | |
19 | extern int dn_route_output_sock(struct dst_entry **pprt, struct flowi *, struct sock *sk, int flags); | |
20 | extern int dn_cache_dump(struct sk_buff *skb, struct netlink_callback *cb); | |
21 | extern int dn_cache_getroute(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg); | |
22 | extern 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 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 | */ | |
68 | struct dn_route { | |
69 | union { | |
70 | struct dst_entry dst; | |
71 | struct dn_route *rt_next; | |
72 | } u; | |
73 | ||
74 | __u16 rt_saddr; | |
75 | __u16 rt_daddr; | |
76 | __u16 rt_gateway; | |
77 | __u16 rt_local_src; /* Source used for forwarding packets */ | |
78 | __u16 rt_src_map; | |
79 | __u16 rt_dst_map; | |
80 | ||
81 | unsigned rt_flags; | |
82 | unsigned rt_type; | |
83 | ||
84 | struct flowi fl; | |
85 | }; | |
86 | ||
87 | extern void dn_route_init(void); | |
88 | extern void dn_route_cleanup(void); | |
89 | ||
90 | #include <net/sock.h> | |
91 | #include <linux/if_arp.h> | |
92 | ||
93 | static inline void dn_rt_send(struct sk_buff *skb) | |
94 | { | |
95 | dev_queue_xmit(skb); | |
96 | } | |
97 | ||
98 | static inline void dn_rt_finish_output(struct sk_buff *skb, char *dst, char *src) | |
99 | { | |
100 | struct net_device *dev = skb->dev; | |
101 | ||
102 | if ((dev->type != ARPHRD_ETHER) && (dev->type != ARPHRD_LOOPBACK)) | |
103 | dst = NULL; | |
104 | ||
105 | if (!dev->hard_header || (dev->hard_header(skb, dev, ETH_P_DNA_RT, | |
106 | dst, src, skb->len) >= 0)) | |
107 | dn_rt_send(skb); | |
108 | else | |
109 | kfree_skb(skb); | |
110 | } | |
111 | ||
112 | #endif /* _NET_DN_ROUTE_H */ |