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Diffstat (limited to 'pfinet/linux-src/include/net/route.h')
| -rw-r--r-- | pfinet/linux-src/include/net/route.h | 153 |
1 files changed, 153 insertions, 0 deletions
diff --git a/pfinet/linux-src/include/net/route.h b/pfinet/linux-src/include/net/route.h new file mode 100644 index 00000000..66df4712 --- /dev/null +++ b/pfinet/linux-src/include/net/route.h @@ -0,0 +1,153 @@ +/* + * INET An implementation of the TCP/IP protocol suite for the LINUX + * operating system. INET is implemented using the BSD Socket + * interface as the means of communication with the user level. + * + * Definitions for the IP router. + * + * Version: @(#)route.h 1.0.4 05/27/93 + * + * Authors: Ross Biro, <bir7@leland.Stanford.Edu> + * Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG> + * Fixes: + * Alan Cox : Reformatted. Added ip_rt_local() + * Alan Cox : Support for TCP parameters. + * Alexey Kuznetsov: Major changes for new routing code. + * Mike McLagan : Routing by source + * + * 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 (at your option) any later version. + */ +#ifndef _ROUTE_H +#define _ROUTE_H + +#include <linux/config.h> +#include <net/dst.h> +#include <linux/in_route.h> +#include <linux/rtnetlink.h> +#include <linux/route.h> + +#ifndef __KERNEL__ +#warning This file is not supposed to be used outside of kernel. +#endif + +#define RT_HASH_DIVISOR 256 + +/* + * Prevents LRU trashing, entries considered equivalent, + * if the difference between last use times is less then this number. + */ +#define RT_CACHE_BUBBLE_THRESHOLD (5*HZ) + + +#define RTO_ONLINK 0x01 +#define RTO_TPROXY 0x80000000 + +#ifdef CONFIG_IP_TRANSPARENT_PROXY +#define RTO_CONN RTO_TPROXY +#else +#define RTO_CONN 0 +#endif + +struct rt_key +{ + __u32 dst; + __u32 src; + int iif; + int oif; +#ifdef CONFIG_IP_ROUTE_FWMARK + __u32 fwmark; +#endif + __u8 tos; + __u8 scope; +}; + +struct rtable +{ + union + { + struct dst_entry dst; + struct rtable *rt_next; + } u; + + unsigned rt_flags; + unsigned rt_type; + + __u32 rt_dst; /* Path destination */ + __u32 rt_src; /* Path source */ + int rt_iif; + + /* Info on neighbour */ + __u32 rt_gateway; + + /* Cache lookup keys */ + struct rt_key key; + + /* Miscellaneous cached information */ + __u32 rt_spec_dst; /* RFC1122 specific destination */ + +#ifdef CONFIG_IP_ROUTE_NAT + __u32 rt_src_map; + __u32 rt_dst_map; +#endif +}; + +extern struct rtable *rt_hash_table[RT_HASH_DIVISOR]; + +struct ip_rt_acct +{ + __u32 o_bytes; + __u32 o_packets; + __u32 i_bytes; + __u32 i_packets; +}; + +extern struct ip_rt_acct ip_rt_acct[256]; + +extern void ip_rt_init(void); +extern void ip_rt_redirect(u32 old_gw, u32 dst, u32 new_gw, + u32 src, u8 tos, struct device *dev); +extern void ip_rt_advice(struct rtable **rp, int advice); +extern void rt_cache_flush(int how); +extern int ip_route_output(struct rtable **, u32 dst, u32 src, u32 tos, int oif); +extern int ip_route_input(struct sk_buff*, u32 dst, u32 src, u8 tos, struct device *devin); +extern unsigned short ip_rt_frag_needed(struct iphdr *iph, unsigned short new_mtu); +extern void ip_rt_update_pmtu(struct dst_entry *dst, unsigned mtu); +extern void ip_rt_send_redirect(struct sk_buff *skb); + +extern unsigned inet_addr_type(u32 addr); +extern void ip_rt_multicast_event(struct in_device *); +extern int ip_rt_ioctl(unsigned int cmd, void *arg); +extern void ip_rt_get_source(u8 *src, struct rtable *rt); +extern int ip_rt_dump(struct sk_buff *skb, struct netlink_callback *cb); + + +extern __inline__ void ip_rt_put(struct rtable * rt) +{ + if (rt) + dst_release(&rt->u.dst); +} + +extern __u8 ip_tos2prio[16]; + +extern __inline__ char rt_tos2priority(u8 tos) +{ + return ip_tos2prio[IPTOS_TOS(tos)>>1]; +} + +extern __inline__ int ip_route_connect(struct rtable **rp, u32 dst, u32 src, u32 tos, int oif) +{ + int err; + err = ip_route_output(rp, dst, src, tos, oif); + if (err || (dst && src)) + return err; + dst = (*rp)->rt_dst; + src = (*rp)->rt_src; + ip_rt_put(*rp); + *rp = NULL; + return ip_route_output(rp, dst, src, tos, oif); +} + +#endif /* _ROUTE_H */ |