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fd9871f7 | 1 | /* SPDX-License-Identifier: GPL-2.0-or-later */ |
1da177e4 LT |
2 | #ifndef _NET_DN_ROUTE_H |
3 | #define _NET_DN_ROUTE_H | |
4 | ||
5 | /****************************************************************************** | |
6 | (c) 1995-1998 E.M. Serrat emserrat@geocities.com | |
7 | ||
1da177e4 LT |
8 | *******************************************************************************/ |
9 | ||
59ddd965 JP |
10 | struct sk_buff *dn_alloc_skb(struct sock *sk, int size, gfp_t pri); |
11 | int dn_route_output_sock(struct dst_entry __rcu **pprt, struct flowidn *, | |
12 | struct sock *sk, int flags); | |
13 | int dn_cache_dump(struct sk_buff *skb, struct netlink_callback *cb); | |
14 | void dn_rt_cache_flush(int delay); | |
f56b8bf6 RK |
15 | int dn_route_rcv(struct sk_buff *skb, struct net_device *dev, |
16 | struct packet_type *pt, struct net_device *orig_dev); | |
1da177e4 LT |
17 | |
18 | /* Masks for flags field */ | |
19 | #define DN_RT_F_PID 0x07 /* Mask for packet type */ | |
20 | #define DN_RT_F_PF 0x80 /* Padding Follows */ | |
21 | #define DN_RT_F_VER 0x40 /* Version =0 discard packet if ==1 */ | |
22 | #define DN_RT_F_IE 0x20 /* Intra Ethernet, Reserved in short pkt */ | |
23 | #define DN_RT_F_RTS 0x10 /* Packet is being returned to sender */ | |
24 | #define DN_RT_F_RQR 0x08 /* Return packet to sender upon non-delivery */ | |
25 | ||
26 | /* Mask for types of routing packets */ | |
27 | #define DN_RT_PKT_MSK 0x06 | |
28 | /* Types of routing packets */ | |
29 | #define DN_RT_PKT_SHORT 0x02 /* Short routing packet */ | |
30 | #define DN_RT_PKT_LONG 0x06 /* Long routing packet */ | |
31 | ||
32 | /* Mask for control/routing selection */ | |
33 | #define DN_RT_PKT_CNTL 0x01 /* Set to 1 if a control packet */ | |
34 | /* Types of control packets */ | |
35 | #define DN_RT_CNTL_MSK 0x0f /* Mask for control packets */ | |
36 | #define DN_RT_PKT_INIT 0x01 /* Initialisation packet */ | |
37 | #define DN_RT_PKT_VERI 0x03 /* Verification Message */ | |
38 | #define DN_RT_PKT_HELO 0x05 /* Hello and Test Message */ | |
39 | #define DN_RT_PKT_L1RT 0x07 /* Level 1 Routing Message */ | |
40 | #define DN_RT_PKT_L2RT 0x09 /* Level 2 Routing Message */ | |
41 | #define DN_RT_PKT_ERTH 0x0b /* Ethernet Router Hello */ | |
42 | #define DN_RT_PKT_EEDH 0x0d /* Ethernet EndNode Hello */ | |
43 | ||
44 | /* Values for info field in hello message */ | |
45 | #define DN_RT_INFO_TYPE 0x03 /* Type mask */ | |
46 | #define DN_RT_INFO_L1RT 0x02 /* L1 Router */ | |
47 | #define DN_RT_INFO_L2RT 0x01 /* L2 Router */ | |
48 | #define DN_RT_INFO_ENDN 0x03 /* EndNode */ | |
49 | #define DN_RT_INFO_VERI 0x04 /* Verification Reqd. */ | |
50 | #define DN_RT_INFO_RJCT 0x08 /* Reject Flag, Reserved */ | |
51 | #define DN_RT_INFO_VFLD 0x10 /* Verification Failed, Reserved */ | |
52 | #define DN_RT_INFO_NOML 0x20 /* No Multicast traffic accepted */ | |
53 | #define DN_RT_INFO_BLKR 0x40 /* Blocking Requested */ | |
54 | ||
55 | /* | |
56 | * The fl structure is what we used to look up the route. | |
57 | * The rt_saddr & rt_daddr entries are the same as key.saddr & key.daddr | |
58 | * except for local input routes, where the rt_saddr = fl.fld_dst and | |
59 | * rt_daddr = fl.fld_src to allow the route to be used for returning | |
60 | * packets to the originating host. | |
61 | */ | |
62 | struct dn_route { | |
d8d1f30b | 63 | struct dst_entry dst; |
fe736e77 | 64 | struct dn_route __rcu *dn_next; |
1da177e4 | 65 | |
fccd7d5c DM |
66 | struct neighbour *n; |
67 | ||
bef55aeb | 68 | struct flowidn fld; |
0c195c3f | 69 | |
c4ea94ab SW |
70 | __le16 rt_saddr; |
71 | __le16 rt_daddr; | |
72 | __le16 rt_gateway; | |
73 | __le16 rt_local_src; /* Source used for forwarding packets */ | |
74 | __le16 rt_src_map; | |
75 | __le16 rt_dst_map; | |
1da177e4 | 76 | |
95c96174 ED |
77 | unsigned int rt_flags; |
78 | unsigned int rt_type; | |
1da177e4 LT |
79 | }; |
80 | ||
c7537967 DM |
81 | static inline bool dn_is_input_route(struct dn_route *rt) |
82 | { | |
bef55aeb | 83 | return rt->fld.flowidn_iif != 0; |
c7537967 DM |
84 | } |
85 | ||
86 | static inline bool dn_is_output_route(struct dn_route *rt) | |
87 | { | |
bef55aeb | 88 | return rt->fld.flowidn_iif == 0; |
c7537967 DM |
89 | } |
90 | ||
59ddd965 JP |
91 | void dn_route_init(void); |
92 | void dn_route_cleanup(void); | |
1da177e4 LT |
93 | |
94 | #include <net/sock.h> | |
95 | #include <linux/if_arp.h> | |
96 | ||
97 | static inline void dn_rt_send(struct sk_buff *skb) | |
98 | { | |
99 | dev_queue_xmit(skb); | |
100 | } | |
101 | ||
102 | static inline void dn_rt_finish_output(struct sk_buff *skb, char *dst, char *src) | |
103 | { | |
104 | struct net_device *dev = skb->dev; | |
105 | ||
106 | if ((dev->type != ARPHRD_ETHER) && (dev->type != ARPHRD_LOOPBACK)) | |
107 | dst = NULL; | |
108 | ||
0c4e8581 | 109 | if (dev_hard_header(skb, dev, ETH_P_DNA_RT, dst, src, skb->len) >= 0) |
1da177e4 LT |
110 | dn_rt_send(skb); |
111 | else | |
112 | kfree_skb(skb); | |
113 | } | |
114 | ||
115 | #endif /* _NET_DN_ROUTE_H */ |