diff options
Diffstat (limited to 'include/net/dn_route.h')
| -rw-r--r-- | include/net/dn_route.h | 117 |
1 files changed, 117 insertions, 0 deletions
diff --git a/include/net/dn_route.h b/include/net/dn_route.h new file mode 100644 index 00000000..81712cfa --- /dev/null +++ b/include/net/dn_route.h @@ -0,0 +1,117 @@ +#ifndef _NET_DN_ROUTE_H +#define _NET_DN_ROUTE_H + +/****************************************************************************** + (c) 1995-1998 E.M. Serrat emserrat@geocities.com + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 2 of the License, or + any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. +*******************************************************************************/ + +extern struct sk_buff *dn_alloc_skb(struct sock *sk, int size, gfp_t pri); +extern int dn_route_output_sock(struct dst_entry **pprt, struct flowidn *, struct sock *sk, int flags); +extern int dn_cache_dump(struct sk_buff *skb, struct netlink_callback *cb); +extern void dn_rt_cache_flush(int delay); + +/* 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 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 rt_flags; + unsigned 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; +} + +extern void dn_route_init(void); +extern 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 */ |