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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 | /* * 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 <net/inetpeer.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 RTO_ONLINK 0x01 #define RTO_TPROXY 0x80000000 #define RTO_CONN 0 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; }; 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); } #ifdef CONFIG_INET_ECN #define IPTOS_RT_MASK (IPTOS_TOS_MASK & ~3) #else #define IPTOS_RT_MASK IPTOS_TOS_MASK #endif 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 */ |