dn_route.h (4058B)
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 10struct sk_buff *dn_alloc_skb(struct sock *sk, int size, gfp_t pri); 11int dn_route_output_sock(struct dst_entry __rcu **pprt, struct flowidn *, 12 struct sock *sk, int flags); 13int dn_cache_dump(struct sk_buff *skb, struct netlink_callback *cb); 14void dn_rt_cache_flush(int delay); 15int 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 */ 62struct 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 81static inline bool dn_is_input_route(struct dn_route *rt) 82{ 83 return rt->fld.flowidn_iif != 0; 84} 85 86static inline bool dn_is_output_route(struct dn_route *rt) 87{ 88 return rt->fld.flowidn_iif == 0; 89} 90 91void dn_route_init(void); 92void dn_route_cleanup(void); 93 94#include <net/sock.h> 95#include <linux/if_arp.h> 96 97static inline void dn_rt_send(struct sk_buff *skb) 98{ 99 dev_queue_xmit(skb); 100} 101 102static 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 */