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TOMOYO Linux Cross Reference
Linux/include/net/dn_route.h

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  1 /* SPDX-License-Identifier: GPL-2.0-or-later */
  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     
  8 *******************************************************************************/
  9 
 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);
 15 int dn_route_rcv(struct sk_buff *skb, struct net_device *dev,
 16                  struct packet_type *pt, struct net_device *orig_dev);
 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 {
 63         struct dst_entry dst;
 64         struct dn_route __rcu *dn_next;
 65 
 66         struct neighbour *n;
 67 
 68         struct flowidn fld;
 69 
 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;
 76 
 77         unsigned int rt_flags;
 78         unsigned int rt_type;
 79 };
 80 
 81 static inline bool dn_is_input_route(struct dn_route *rt)
 82 {
 83         return rt->fld.flowidn_iif != 0;
 84 }
 85 
 86 static inline bool dn_is_output_route(struct dn_route *rt)
 87 {
 88         return rt->fld.flowidn_iif == 0;
 89 }
 90 
 91 void dn_route_init(void);
 92 void dn_route_cleanup(void);
 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 
109         if (dev_hard_header(skb, dev, ETH_P_DNA_RT, dst, src, skb->len) >= 0)
110                 dn_rt_send(skb);
111         else
112                 kfree_skb(skb);
113 }
114 
115 #endif /* _NET_DN_ROUTE_H */
116 

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