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편집 파일: dn_route.h

/* SPDX-License-Identifier: GPL-2.0-or-later */ #ifndef _NET_DN_ROUTE_H #define _NET_DN_ROUTE_H /****************************************************************************** (c) 1995-1998 E.M. Serrat emserrat@geocities.com *******************************************************************************/ #include <linux/types.h> #include <net/dst.h> struct sk_buff *dn_alloc_skb(struct sock *sk, int size, gfp_t pri); int dn_route_output_sock(struct dst_entry __rcu **pprt, struct flowidn *, struct sock *sk, int flags); int dn_cache_dump(struct sk_buff *skb, struct netlink_callback *cb); void dn_rt_cache_flush(int delay); int dn_route_rcv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt, struct net_device *orig_dev); /* Masks for flags field */ #define DN_RT_F_PID 0x07 /* Mask for packet type */ #define DN_RT_F_PF 0x80 /* Padding Follows */ #define DN_RT_F_VER 0x40 /* Version =0 discard packet if ==1 */ #define DN_RT_F_IE 0x20 /* Intra Ethernet, Reserved in short pkt */ #define DN_RT_F_RTS 0x10 /* Packet is being returned to sender */ #define DN_RT_F_RQR 0x08 /* Return packet to sender upon non-delivery */ /* Mask for types of routing packets */ #define DN_RT_PKT_MSK 0x06 /* Types of routing packets */ #define DN_RT_PKT_SHORT 0x02 /* Short routing packet */ #define DN_RT_PKT_LONG 0x06 /* Long routing packet */ /* Mask for control/routing selection */ #define DN_RT_PKT_CNTL 0x01 /* Set to 1 if a control packet */ /* Types of control packets */ #define DN_RT_CNTL_MSK 0x0f /* Mask for control packets */ #define DN_RT_PKT_INIT 0x01 /* Initialisation packet */ #define DN_RT_PKT_VERI 0x03 /* Verification Message */ #define DN_RT_PKT_HELO 0x05 /* Hello and Test Message */ #define DN_RT_PKT_L1RT 0x07 /* Level 1 Routing Message */ #define DN_RT_PKT_L2RT 0x09 /* Level 2 Routing Message */ #define DN_RT_PKT_ERTH 0x0b /* Ethernet Router Hello */ #define DN_RT_PKT_EEDH 0x0d /* Ethernet EndNode Hello */ /* Values for info field in hello message */ #define DN_RT_INFO_TYPE 0x03 /* Type mask */ #define DN_RT_INFO_L1RT 0x02 /* L1 Router */ #define DN_RT_INFO_L2RT 0x01 /* L2 Router */ #define DN_RT_INFO_ENDN 0x03 /* EndNode */ #define DN_RT_INFO_VERI 0x04 /* Verification Reqd. */ #define DN_RT_INFO_RJCT 0x08 /* Reject Flag, Reserved */ #define DN_RT_INFO_VFLD 0x10 /* Verification Failed, Reserved */ #define DN_RT_INFO_NOML 0x20 /* No Multicast traffic accepted */ #define DN_RT_INFO_BLKR 0x40 /* Blocking Requested */ /* * The fl structure is what we used to look up the route. * The rt_saddr & rt_daddr entries are the same as key.saddr & key.daddr * except for local input routes, where the rt_saddr = fl.fld_dst and * rt_daddr = fl.fld_src to allow the route to be used for returning * packets to the originating host. */ struct dn_route { struct dst_entry dst; struct dn_route __rcu *dn_next; struct neighbour *n; struct flowidn fld; __le16 rt_saddr; __le16 rt_daddr; __le16 rt_gateway; __le16 rt_local_src; /* Source used for forwarding packets */ __le16 rt_src_map; __le16 rt_dst_map; unsigned int rt_flags; unsigned int rt_type; }; static inline bool dn_is_input_route(struct dn_route *rt) { return rt->fld.flowidn_iif != 0; } static inline bool dn_is_output_route(struct dn_route *rt) { return rt->fld.flowidn_iif == 0; } void dn_route_init(void); void dn_route_cleanup(void); #include <net/sock.h> #include <linux/if_arp.h> static inline void dn_rt_send(struct sk_buff *skb) { dev_queue_xmit(skb); } static inline void dn_rt_finish_output(struct sk_buff *skb, char *dst, char *src) { struct net_device *dev = skb->dev; if ((dev->type != ARPHRD_ETHER) && (dev->type != ARPHRD_LOOPBACK)) dst = NULL; if (dev_hard_header(skb, dev, ETH_P_DNA_RT, dst, src, skb->len) >= 0) dn_rt_send(skb); else kfree_skb(skb); } #endif /* _NET_DN_ROUTE_H */