| /* |
| * 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 |
| * Robert Olsson : Added rt_cache statistics |
| * |
| * 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 <net/inetpeer.h> |
| #include <linux/in_route.h> |
| #include <linux/rtnetlink.h> |
| #include <linux/route.h> |
| #include <linux/ip.h> |
| #include <linux/cache.h> |
| |
| #ifndef __KERNEL__ |
| #warning This file is not supposed to be used outside of kernel. |
| #endif |
| |
| #define RTO_ONLINK 0x01 |
| |
| #define RTO_CONN 0 |
| /* RTO_CONN is not used (being alias for 0), but preserved not to break |
| * some modules referring to it. */ |
| |
| #define RT_CONN_FLAGS(sk) (RT_TOS(inet_sk(sk)->tos) | sk->localroute) |
| |
| struct rt_key |
| { |
| __u32 dst; |
| __u32 src; |
| int iif; |
| int oif; |
| #ifdef CONFIG_IP_ROUTE_FWMARK |
| __u32 fwmark; |
| #endif |
| __u8 tos; |
| __u8 scope; |
| }; |
| |
| struct inet_peer; |
| 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 */ |
| struct inet_peer *peer; /* long-living peer info */ |
| |
| #ifdef CONFIG_IP_ROUTE_NAT |
| __u32 rt_src_map; |
| __u32 rt_dst_map; |
| #endif |
| }; |
| |
| struct ip_rt_acct |
| { |
| __u32 o_bytes; |
| __u32 o_packets; |
| __u32 i_bytes; |
| __u32 i_packets; |
| }; |
| |
| struct rt_cache_stat |
| { |
| unsigned int in_hit; |
| unsigned int in_slow_tot; |
| unsigned int in_slow_mc; |
| unsigned int in_no_route; |
| unsigned int in_brd; |
| unsigned int in_martian_dst; |
| unsigned int in_martian_src; |
| unsigned int out_hit; |
| unsigned int out_slow_tot; |
| unsigned int out_slow_mc; |
| unsigned int gc_total; |
| unsigned int gc_ignored; |
| unsigned int gc_goal_miss; |
| unsigned int gc_dst_overflow; |
| } ____cacheline_aligned_in_smp; |
| |
| extern struct ip_rt_acct *ip_rt_acct; |
| |
| struct in_device; |
| extern void ip_rt_init(void); |
| extern void ip_rt_redirect(u32 old_gw, u32 dst, u32 new_gw, |
| u32 src, u8 tos, struct net_device *dev); |
| extern void ip_rt_advice(struct rtable **rp, int advice); |
| extern void rt_cache_flush(int how); |
| extern int ip_route_output_key(struct rtable **, const struct rt_key *key); |
| extern int ip_route_input(struct sk_buff*, u32 dst, u32 src, u8 tos, struct net_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); |
| |
| /* Deprecated: use ip_route_output_key directly */ |
| static inline int ip_route_output(struct rtable **rp, |
| u32 daddr, u32 saddr, u32 tos, int oif) |
| { |
| struct rt_key key = { dst:daddr, src:saddr, oif:oif, tos:tos }; |
| |
| return ip_route_output_key(rp, &key); |
| } |
| |
| |
| static inline void ip_rt_put(struct rtable * rt) |
| { |
| if (rt) |
| dst_release(&rt->u.dst); |
| } |
| |
| #define IPTOS_RT_MASK (IPTOS_TOS_MASK & ~3) |
| |
| extern __u8 ip_tos2prio[16]; |
| |
| static inline char rt_tos2priority(u8 tos) |
| { |
| return ip_tos2prio[IPTOS_TOS(tos)>>1]; |
| } |
| |
| static 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); |
| } |
| |
| extern void rt_bind_peer(struct rtable *rt, int create); |
| |
| static inline struct inet_peer *rt_get_peer(struct rtable *rt) |
| { |
| if (rt->peer) |
| return rt->peer; |
| |
| rt_bind_peer(rt, 0); |
| return rt->peer; |
| } |
| |
| #endif /* _ROUTE_H */ |