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git.proxmox.com Git - mirror_ubuntu-zesty-kernel.git/blob - include/net/route.h
2 * INET An implementation of the TCP/IP protocol suite for the LINUX
3 * operating system. INET is implemented using the BSD Socket
4 * interface as the means of communication with the user level.
6 * Definitions for the IP router.
8 * Version: @(#)route.h 1.0.4 05/27/93
11 * Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
13 * Alan Cox : Reformatted. Added ip_rt_local()
14 * Alan Cox : Support for TCP parameters.
15 * Alexey Kuznetsov: Major changes for new routing code.
16 * Mike McLagan : Routing by source
17 * Robert Olsson : Added rt_cache statistics
19 * This program is free software; you can redistribute it and/or
20 * modify it under the terms of the GNU General Public License
21 * as published by the Free Software Foundation; either version
22 * 2 of the License, or (at your option) any later version.
28 #include <net/inetpeer.h>
30 #include <net/inet_sock.h>
31 #include <linux/in_route.h>
32 #include <linux/rtnetlink.h>
33 #include <linux/route.h>
35 #include <linux/cache.h>
36 #include <linux/security.h>
39 #warning This file is not supposed to be used outside of kernel.
42 #define RTO_ONLINK 0x01
45 /* RTO_CONN is not used (being alias for 0), but preserved not to break
46 * some modules referring to it. */
48 #define RT_CONN_FLAGS(sk) (RT_TOS(inet_sk(sk)->tos) | sock_flag(sk, SOCK_LOCALROUTE))
59 /* Cache lookup keys */
62 struct in_device
*idev
;
68 __be32 rt_dst
; /* Path destination */
69 __be32 rt_src
; /* Path source */
72 /* Info on neighbour */
75 /* Miscellaneous cached information */
76 __be32 rt_spec_dst
; /* RFC1122 specific destination */
77 struct inet_peer
*peer
; /* long-living peer info */
91 unsigned int in_slow_tot
;
92 unsigned int in_slow_mc
;
93 unsigned int in_no_route
;
95 unsigned int in_martian_dst
;
96 unsigned int in_martian_src
;
98 unsigned int out_slow_tot
;
99 unsigned int out_slow_mc
;
100 unsigned int gc_total
;
101 unsigned int gc_ignored
;
102 unsigned int gc_goal_miss
;
103 unsigned int gc_dst_overflow
;
104 unsigned int in_hlist_search
;
105 unsigned int out_hlist_search
;
108 extern struct ip_rt_acct
*ip_rt_acct
;
111 extern int ip_rt_init(void);
112 extern void ip_rt_redirect(__be32 old_gw
, __be32 dst
, __be32 new_gw
,
113 __be32 src
, struct net_device
*dev
);
114 extern void rt_cache_flush(struct net
*net
, int how
);
115 extern int __ip_route_output_key(struct net
*, struct rtable
**, const struct flowi
*flp
);
116 extern int ip_route_output_key(struct net
*, struct rtable
**, struct flowi
*flp
);
117 extern int ip_route_output_flow(struct net
*, struct rtable
**rp
, struct flowi
*flp
, struct sock
*sk
, int flags
);
118 extern int ip_route_input(struct sk_buff
*, __be32 dst
, __be32 src
, u8 tos
, struct net_device
*devin
);
119 extern unsigned short ip_rt_frag_needed(struct net
*net
, struct iphdr
*iph
, unsigned short new_mtu
, struct net_device
*dev
);
120 extern void ip_rt_send_redirect(struct sk_buff
*skb
);
122 extern unsigned inet_addr_type(struct net
*net
, __be32 addr
);
123 extern unsigned inet_dev_addr_type(struct net
*net
, const struct net_device
*dev
, __be32 addr
);
124 extern void ip_rt_multicast_event(struct in_device
*);
125 extern int ip_rt_ioctl(struct net
*, unsigned int cmd
, void __user
*arg
);
126 extern void ip_rt_get_source(u8
*src
, struct rtable
*rt
);
127 extern int ip_rt_dump(struct sk_buff
*skb
, struct netlink_callback
*cb
);
130 extern void fib_add_ifaddr(struct in_ifaddr
*);
132 static inline void ip_rt_put(struct rtable
* rt
)
135 dst_release(&rt
->u
.dst
);
138 #define IPTOS_RT_MASK (IPTOS_TOS_MASK & ~3)
140 extern const __u8 ip_tos2prio
[16];
142 static inline char rt_tos2priority(u8 tos
)
144 return ip_tos2prio
[IPTOS_TOS(tos
)>>1];
147 static inline int ip_route_connect(struct rtable
**rp
, __be32 dst
,
148 __be32 src
, u32 tos
, int oif
, u8 protocol
,
149 __be16 sport
, __be16 dport
, struct sock
*sk
,
152 struct flowi fl
= { .oif
= oif
,
154 .nl_u
= { .ip4_u
= { .daddr
= dst
,
160 .dport
= dport
} } };
163 struct net
*net
= sock_net(sk
);
165 if (inet_sk(sk
)->transparent
)
166 fl
.flags
|= FLOWI_FLAG_ANYSRC
;
169 err
= __ip_route_output_key(net
, rp
, &fl
);
172 fl
.fl4_dst
= (*rp
)->rt_dst
;
173 fl
.fl4_src
= (*rp
)->rt_src
;
177 security_sk_classify_flow(sk
, &fl
);
178 return ip_route_output_flow(net
, rp
, &fl
, sk
, flags
);
181 static inline int ip_route_newports(struct rtable
**rp
, u8 protocol
,
182 __be16 sport
, __be16 dport
, struct sock
*sk
)
184 if (sport
!= (*rp
)->fl
.fl_ip_sport
||
185 dport
!= (*rp
)->fl
.fl_ip_dport
) {
188 memcpy(&fl
, &(*rp
)->fl
, sizeof(fl
));
189 fl
.fl_ip_sport
= sport
;
190 fl
.fl_ip_dport
= dport
;
194 security_sk_classify_flow(sk
, &fl
);
195 return ip_route_output_flow(sock_net(sk
), rp
, &fl
, sk
, 0);
200 extern void rt_bind_peer(struct rtable
*rt
, int create
);
202 static inline struct inet_peer
*rt_get_peer(struct rtable
*rt
)
211 static inline int inet_iif(const struct sk_buff
*skb
)
213 return skb_rtable(skb
)->rt_iif
;
216 #endif /* _ROUTE_H */