/* * 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 * 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 <net/dst.h> #include <net/inetpeer.h> #include <net/flow.h> #include <net/inet_sock.h> #include <net/ip_fib.h> #include <linux/in_route.h> #include <linux/rtnetlink.h> #include <linux/rcupdate.h> #include <linux/route.h> #include <linux/ip.h> #include <linux/cache.h> #include <linux/security.h> /* IPv4 datagram length is stored into 16bit field (tot_len) */ #define IP_MAX_MTU 0xFFFFU #define RTO_ONLINK 0x01 #define RT_CONN_FLAGS(sk) (RT_TOS(inet_sk(sk)->tos) | sock_flag(sk, SOCK_LOCALROUTE)) #define RT_CONN_FLAGS_TOS(sk,tos) (RT_TOS(tos) | sock_flag(sk, SOCK_LOCALROUTE)) struct fib_nh; struct fib_info; struct uncached_list; struct rtable { struct dst_entry dst; int rt_genid; unsigned int rt_flags; __u16 rt_type; __u8 rt_is_input; __u8 rt_uses_gateway; int rt_iif; /* Info on neighbour */ __be32 rt_gateway; /* Miscellaneous cached information */ u32 rt_mtu_locked:1, rt_pmtu:31; u32 rt_table_id; struct list_head rt_uncached; struct uncached_list *rt_uncached_list; }; static inline bool rt_is_input_route(const struct rtable *rt) { return rt->rt_is_input != 0; } static inline bool rt_is_output_route(const struct rtable *rt) { return rt->rt_is_input == 0; } static inline __be32 rt_nexthop(const struct rtable *rt, __be32 daddr) { if (rt->rt_gateway) return rt->rt_gateway; return daddr; } struct ip_rt_acct { __u32 o_bytes; __u32 o_packets; __u32 i_bytes; __u32 i_packets; }; struct rt_cache_stat { 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_slow_tot; unsigned int out_slow_mc; }; extern struct ip_rt_acct __percpu *ip_rt_acct; struct in_device; int ip_rt_init(void); void rt_cache_flush(struct net *net); void rt_flush_dev(struct net_device *dev); struct rtable *ip_route_output_key_hash(struct net *net, struct flowi4 *flp, const struct sk_buff *skb); struct rtable *ip_route_output_key_hash_rcu(struct net *net, struct flowi4 *flp, struct fib_result *res, const struct sk_buff *skb); static inline struct rtable *__ip_route_output_key(struct net *net, struct flowi4 *flp) { return ip_route_output_key_hash(net, flp, NULL); } struct rtable *ip_route_output_flow(struct net *, struct flowi4 *flp, const struct sock *sk); struct dst_entry *ipv4_blackhole_route(struct net *net, struct dst_entry *dst_orig); static inline struct rtable *ip_route_output_key(struct net *net, struct flowi4 *flp) { return ip_route_output_flow(net, flp, NULL); } static inline struct rtable *ip_route_output(struct net *net, __be32 daddr, __be32 saddr, u8 tos, int oif) { struct flowi4 fl4 = { .flowi4_oif = oif, .flowi4_tos = tos, .daddr = daddr, .saddr = saddr, }; return ip_route_output_key(net, &fl4); } static inline struct rtable *ip_route_output_ports(struct net *net, struct flowi4 *fl4, struct sock *sk, __be32 daddr, __be32 saddr, __be16 dport, __be16 sport, __u8 proto, __u8 tos, int oif) { flowi4_init_output(fl4, oif, sk ? sk->sk_mark : 0, tos, RT_SCOPE_UNIVERSE, proto, sk ? inet_sk_flowi_flags(sk) : 0, daddr, saddr, dport, sport, sock_net_uid(net, sk)); if (sk) security_sk_classify_flow(sk, flowi4_to_flowi(fl4)); return ip_route_output_flow(net, fl4, sk); } static inline struct rtable *ip_route_output_gre(struct net *net, struct flowi4 *fl4, __be32 daddr, __be32 saddr, __be32 gre_key, __u8 tos, int oif) { memset(fl4, 0, sizeof(*fl4)); fl4->flowi4_oif = oif; fl4->daddr = daddr; fl4->saddr = saddr; fl4->flowi4_tos = tos; fl4->flowi4_proto = IPPROTO_GRE; fl4->fl4_gre_key = gre_key; return ip_route_output_key(net, fl4); } int ip_mc_validate_source(struct sk_buff *skb, __be32 daddr, __be32 saddr, u8 tos, struct net_device *dev, struct in_device *in_dev, u32 *itag); int ip_route_input_noref(struct sk_buff *skb, __be32 dst, __be32 src, u8 tos, struct net_device *devin); int ip_route_input_rcu(struct sk_buff *skb, __be32 dst, __be32 src, u8 tos, struct net_device *devin, struct fib_result *res); static inline int ip_route_input(struct sk_buff *skb, __be32 dst, __be32 src, u8 tos, struct net_device *devin) { int err; rcu_read_lock(); err = ip_route_input_noref(skb, dst, src, tos, devin); if (!err) { skb_dst_force(skb); if (!skb_dst(skb)) err = -EINVAL; } rcu_read_unlock(); return err; } void ipv4_update_pmtu(struct sk_buff *skb, struct net *net, u32 mtu, int oif, u32 mark, u8 protocol, int flow_flags); void ipv4_sk_update_pmtu(struct sk_buff *skb, struct sock *sk, u32 mtu); void ipv4_redirect(struct sk_buff *skb, struct net *net, int oif, u32 mark, u8 protocol, int flow_flags); void ipv4_sk_redirect(struct sk_buff *skb, struct sock *sk); void ip_rt_send_redirect(struct sk_buff *skb); unsigned int inet_addr_type(struct net *net, __be32 addr); unsigned int inet_addr_type_table(struct net *net, __be32 addr, u32 tb_id); unsigned int inet_dev_addr_type(struct net *net, const struct net_device *dev, __be32 addr); unsigned int inet_addr_type_dev_table(struct net *net, const struct net_device *dev, __be32 addr); void ip_rt_multicast_event(struct in_device *); int ip_rt_ioctl(struct net *, unsigned int cmd, void __user *arg); void ip_rt_get_source(u8 *src, struct sk_buff *skb, struct rtable *rt); struct rtable *rt_dst_alloc(struct net_device *dev, unsigned int flags, u16 type, bool nopolicy, bool noxfrm, bool will_cache); struct in_ifaddr; void fib_add_ifaddr(struct in_ifaddr *); void fib_del_ifaddr(struct in_ifaddr *, struct in_ifaddr *); void rt_add_uncached_list(struct rtable *rt); void rt_del_uncached_list(struct rtable *rt); static inline void ip_rt_put(struct rtable *rt) { /* dst_release() accepts a NULL parameter. * We rely on dst being first structure in struct rtable */ BUILD_BUG_ON(offsetof(struct rtable, dst) != 0); dst_release(&rt->dst); } #define IPTOS_RT_MASK (IPTOS_TOS_MASK & ~3) extern const __u8 ip_tos2prio[16]; static inline char rt_tos2priority(u8 tos) { return ip_tos2prio[IPTOS_TOS(tos)>>1]; } /* ip_route_connect() and ip_route_newports() work in tandem whilst * binding a socket for a new outgoing connection. * * In order to use IPSEC properly, we must, in the end, have a * route that was looked up using all available keys including source * and destination ports. * * However, if a source port needs to be allocated (the user specified * a wildcard source port) we need to obtain addressing information * in order to perform that allocation. * * So ip_route_connect() looks up a route using wildcarded source and * destination ports in the key, simply so that we can get a pair of * addresses to use for port allocation. * * Later, once the ports are allocated, ip_route_newports() will make * another route lookup if needed to make sure we catch any IPSEC * rules keyed on the port information. * * The callers allocate the flow key on their stack, and must pass in * the same flowi4 object to both the ip_route_connect() and the * ip_route_newports() calls. */ static inline void ip_route_connect_init(struct flowi4 *fl4, __be32 dst, __be32 src, u32 tos, int oif, u8 protocol, __be16 sport, __be16 dport, struct sock *sk) { __u8 flow_flags = 0; if (inet_sk(sk)->transparent) flow_flags |= FLOWI_FLAG_ANYSRC; flowi4_init_output(fl4, oif, sk->sk_mark, tos, RT_SCOPE_UNIVERSE, protocol, flow_flags, dst, src, dport, sport, sk->sk_uid); } static inline struct rtable *ip_route_connect(struct flowi4 *fl4, __be32 dst, __be32 src, u32 tos, int oif, u8 protocol, __be16 sport, __be16 dport, struct sock *sk) { struct net *net = sock_net(sk); struct rtable *rt; ip_route_connect_init(fl4, dst, src, tos, oif, protocol, sport, dport, sk); if (!dst || !src) { rt = __ip_route_output_key(net, fl4); if (IS_ERR(rt)) return rt; ip_rt_put(rt); flowi4_update_output(fl4, oif, tos, fl4->daddr, fl4->saddr); } security_sk_classify_flow(sk, flowi4_to_flowi(fl4)); return ip_route_output_flow(net, fl4, sk); } static inline struct rtable *ip_route_newports(struct flowi4 *fl4, struct rtable *rt, __be16 orig_sport, __be16 orig_dport, __be16 sport, __be16 dport, struct sock *sk) { if (sport != orig_sport || dport != orig_dport) { fl4->fl4_dport = dport; fl4->fl4_sport = sport; ip_rt_put(rt); flowi4_update_output(fl4, sk->sk_bound_dev_if, RT_CONN_FLAGS(sk), fl4->daddr, fl4->saddr); security_sk_classify_flow(sk, flowi4_to_flowi(fl4)); return ip_route_output_flow(sock_net(sk), fl4, sk); } return rt; } static inline int inet_iif(const struct sk_buff *skb) { struct rtable *rt = skb_rtable(skb); if (rt && rt->rt_iif) return rt->rt_iif; return skb->skb_iif; } static inline int ip4_dst_hoplimit(const struct dst_entry *dst) { int hoplimit = dst_metric_raw(dst, RTAX_HOPLIMIT); struct net *net = dev_net(dst->dev); if (hoplimit == 0) hoplimit = net->ipv4.sysctl_ip_default_ttl; return hoplimit; } #endif /* _ROUTE_H */
Name | Type | Size | Permission | Actions |
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9p | Folder | 0755 |
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bluetooth | Folder | 0755 |
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caif | Folder | 0755 |
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iucv | Folder | 0755 |
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netfilter | Folder | 0755 |
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netns | Folder | 0755 |
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nfc | Folder | 0755 |
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phonet | Folder | 0755 |
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sctp | Folder | 0755 |
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tc_act | Folder | 0755 |
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6lowpan.h | File | 10.03 KB | 0644 |
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Space.h | File | 1.15 KB | 0644 |
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act_api.h | File | 6.38 KB | 0644 |
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addrconf.h | File | 12.63 KB | 0644 |
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af_ieee802154.h | File | 1.55 KB | 0644 |
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af_rxrpc.h | File | 2.79 KB | 0644 |
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af_unix.h | File | 2.22 KB | 0644 |
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af_vsock.h | File | 7.21 KB | 0644 |
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ah.h | File | 382 B | 0644 |
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arp.h | File | 2 KB | 0644 |
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atmclip.h | File | 1.48 KB | 0644 |
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ax25.h | File | 15.02 KB | 0644 |
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ax88796.h | File | 998 B | 0644 |
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bond_3ad.h | File | 9.79 KB | 0644 |
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bond_alb.h | File | 6.6 KB | 0644 |
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bond_options.h | File | 3.92 KB | 0644 |
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bonding.h | File | 19.1 KB | 0644 |
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busy_poll.h | File | 3.8 KB | 0644 |
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calipso.h | File | 2.15 KB | 0644 |
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cfg80211-wext.h | File | 1.95 KB | 0644 |
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cfg80211.h | File | 221.24 KB | 0644 |
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cfg802154.h | File | 10.89 KB | 0644 |
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checksum.h | File | 4.76 KB | 0644 |
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cipso_ipv4.h | File | 8.2 KB | 0644 |
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cls_cgroup.h | File | 2.15 KB | 0644 |
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codel.h | File | 5.65 KB | 0644 |
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codel_impl.h | File | 7.98 KB | 0644 |
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codel_qdisc.h | File | 2.9 KB | 0644 |
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compat.h | File | 2.11 KB | 0644 |
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datalink.h | File | 619 B | 0644 |
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dcbevent.h | File | 1.26 KB | 0644 |
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dcbnl.h | File | 4.2 KB | 0644 |
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devlink.h | File | 13.25 KB | 0644 |
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dn.h | File | 6.88 KB | 0644 |
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dn_dev.h | File | 5.36 KB | 0644 |
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dn_fib.h | File | 3.98 KB | 0644 |
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dn_neigh.h | File | 968 B | 0644 |
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dn_nsp.h | File | 5.83 KB | 0644 |
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dn_route.h | File | 4.36 KB | 0644 |
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dsa.h | File | 13.94 KB | 0644 |
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dsfield.h | File | 1.11 KB | 0644 |
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dst.h | File | 13.48 KB | 0644 |
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dst_cache.h | File | 2.53 KB | 0644 |
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dst_metadata.h | File | 5.39 KB | 0644 |
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dst_ops.h | File | 2 KB | 0644 |
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erspan.h | File | 2.11 KB | 0644 |
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esp.h | File | 877 B | 0644 |
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ethoc.h | File | 538 B | 0644 |
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fib_notifier.h | File | 1.29 KB | 0644 |
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fib_rules.h | File | 4.18 KB | 0644 |
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firewire.h | File | 636 B | 0644 |
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flow.h | File | 6.16 KB | 0644 |
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flow_dissector.h | File | 7.55 KB | 0644 |
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fou.h | File | 549 B | 0644 |
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fq.h | File | 2.67 KB | 0644 |
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fq_impl.h | File | 6.9 KB | 0644 |
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garp.h | File | 2.62 KB | 0644 |
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gen_stats.h | File | 2.34 KB | 0644 |
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genetlink.h | File | 11.3 KB | 0644 |
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geneve.h | File | 1.67 KB | 0644 |
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gre.h | File | 2.99 KB | 0644 |
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gro_cells.h | File | 443 B | 0644 |
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gtp.h | File | 633 B | 0644 |
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gue.h | File | 3.23 KB | 0644 |
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hwbm.h | File | 937 B | 0644 |
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icmp.h | File | 2.01 KB | 0644 |
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ieee80211_radiotap.h | File | 6.63 KB | 0644 |
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ieee802154_netdev.h | File | 9.14 KB | 0644 |
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if_inet6.h | File | 6.13 KB | 0644 |
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ife.h | File | 1.06 KB | 0644 |
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ila.h | File | 498 B | 0644 |
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inet6_connection_sock.h | File | 976 B | 0644 |
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inet6_hashtables.h | File | 3.7 KB | 0644 |
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inet_common.h | File | 1.89 KB | 0644 |
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inet_connection_sock.h | File | 10.48 KB | 0644 |
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inet_ecn.h | File | 6.02 KB | 0644 |
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inet_frag.h | File | 4.51 KB | 0644 |
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inet_hashtables.h | File | 12.91 KB | 0644 |
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inet_sock.h | File | 8.25 KB | 0644 |
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inet_timewait_sock.h | File | 3.82 KB | 0644 |
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inetpeer.h | File | 3.29 KB | 0644 |
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ip.h | File | 18.51 KB | 0644 |
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ip6_checksum.h | File | 2.89 KB | 0644 |
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ip6_fib.h | File | 10.04 KB | 0644 |
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ip6_route.h | File | 7.63 KB | 0644 |
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ip6_tunnel.h | File | 4.72 KB | 0644 |
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ip_fib.h | File | 10.72 KB | 0644 |
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ip_tunnels.h | File | 13.61 KB | 0644 |
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ip_vs.h | File | 46.78 KB | 0644 |
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ipcomp.h | File | 659 B | 0644 |
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ipconfig.h | File | 811 B | 0644 |
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ipv6.h | File | 29.97 KB | 0644 |
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ipv6_frag.h | File | 2.54 KB | 0644 |
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ipx.h | File | 4.4 KB | 0644 |
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iw_handler.h | File | 20.91 KB | 0644 |
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kcm.h | File | 4.96 KB | 0644 |
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l3mdev.h | File | 5.86 KB | 0644 |
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lapb.h | File | 4.75 KB | 0644 |
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lib80211.h | File | 3.92 KB | 0644 |
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llc.h | File | 4.41 KB | 0644 |
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llc_c_ac.h | File | 9.31 KB | 0644 |
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llc_c_ev.h | File | 10.68 KB | 0644 |
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llc_c_st.h | File | 1.72 KB | 0644 |
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llc_conn.h | File | 4.06 KB | 0644 |
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llc_if.h | File | 2.16 KB | 0644 |
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llc_pdu.h | File | 14.44 KB | 0644 |
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llc_s_ac.h | File | 1.55 KB | 0644 |
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llc_s_ev.h | File | 2.2 KB | 0644 |
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llc_s_st.h | File | 947 B | 0644 |
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llc_sap.h | File | 1.08 KB | 0644 |
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lwtunnel.h | File | 5.84 KB | 0644 |
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mac80211.h | File | 230.36 KB | 0644 |
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mac802154.h | File | 15.27 KB | 0644 |
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mip6.h | File | 1.58 KB | 0644 |
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mld.h | File | 2.8 KB | 0644 |
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mpls.h | File | 932 B | 0644 |
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mpls_iptunnel.h | File | 827 B | 0644 |
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mrp.h | File | 3.03 KB | 0644 |
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ncsi.h | File | 1.92 KB | 0644 |
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ndisc.h | File | 13.77 KB | 0644 |
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neighbour.h | File | 15.06 KB | 0644 |
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net_namespace.h | File | 10.08 KB | 0644 |
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net_ratelimit.h | File | 220 B | 0644 |
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netevent.h | File | 910 B | 0644 |
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netlabel.h | File | 20.74 KB | 0644 |
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netlink.h | File | 40.39 KB | 0644 |
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netprio_cgroup.h | File | 1.24 KB | 0644 |
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netrom.h | File | 7.68 KB | 0644 |
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nexthop.h | File | 865 B | 0644 |
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nl802154.h | File | 12.09 KB | 0644 |
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nsh.h | File | 12.31 KB | 0644 |
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p8022.h | File | 447 B | 0644 |
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ping.h | File | 3.45 KB | 0644 |
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pkt_cls.h | File | 17.34 KB | 0644 |
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pkt_sched.h | File | 4.05 KB | 0644 |
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pptp.h | File | 557 B | 0644 |
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protocol.h | File | 4.08 KB | 0644 |
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psample.h | File | 860 B | 0644 |
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psnap.h | File | 351 B | 0644 |
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raw.h | File | 2.07 KB | 0644 |
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rawv6.h | File | 854 B | 0644 |
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red.h | File | 10.45 KB | 0644 |
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regulatory.h | File | 10.12 KB | 0644 |
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request_sock.h | File | 6.46 KB | 0644 |
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rose.h | File | 7.62 KB | 0644 |
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route.h | File | 10.02 KB | 0644 |
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rtnetlink.h | File | 6.13 KB | 0644 |
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sch_generic.h | File | 23.3 KB | 0644 |
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scm.h | File | 3.5 KB | 0644 |
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secure_seq.h | File | 855 B | 0644 |
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seg6.h | File | 1.66 KB | 0644 |
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seg6_hmac.h | File | 1.65 KB | 0644 |
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slhc_vj.h | File | 6.67 KB | 0644 |
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smc.h | File | 440 B | 0644 |
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snmp.h | File | 5.23 KB | 0644 |
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sock.h | File | 69.75 KB | 0644 |
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sock_reuseport.h | File | 863 B | 0644 |
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stp.h | File | 383 B | 0644 |
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strparser.h | File | 3.75 KB | 0644 |
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switchdev.h | File | 6.52 KB | 0644 |
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tcp.h | File | 62.8 KB | 0644 |
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tcp_states.h | File | 1.26 KB | 0644 |
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timewait_sock.h | File | 1.11 KB | 0644 |
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tipc.h | File | 2.34 KB | 0644 |
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tls.h | File | 7.12 KB | 0644 |
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transp_v6.h | File | 2.08 KB | 0644 |
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tso.h | File | 515 B | 0644 |
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tun_proto.h | File | 988 B | 0644 |
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udp.h | File | 12.82 KB | 0644 |
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udp_tunnel.h | File | 5.12 KB | 0644 |
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udplite.h | File | 3.83 KB | 0644 |
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vsock_addr.h | File | 1.05 KB | 0644 |
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vxlan.h | File | 10.43 KB | 0644 |
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wext.h | File | 1.51 KB | 0644 |
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wimax.h | File | 19.97 KB | 0644 |
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x25.h | File | 9.43 KB | 0644 |
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x25device.h | File | 387 B | 0644 |
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xfrm.h | File | 53.72 KB | 0644 |
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