Release 4.7 include/net/route.h
/*
* 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 <net/l3mdev.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_pmtu;
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;
}
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| Person | Tokens | Prop | Commits | CommitProp |
| david s. miller | david s. miller | 19 | 95.00% | 2 | 66.67% |
| steffen klassert | steffen klassert | 1 | 5.00% | 1 | 33.33% |
| Total | 20 | 100.00% | 3 | 100.00% |
static inline bool rt_is_output_route(const struct rtable *rt)
{
return rt->rt_is_input == 0;
}
Contributors
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| david s. miller | david s. miller | 19 | 95.00% | 2 | 66.67% |
| steffen klassert | steffen klassert | 1 | 5.00% | 1 | 33.33% |
| Total | 20 | 100.00% | 3 | 100.00% |
static inline __be32 rt_nexthop(const struct rtable *rt, __be32 daddr)
{
if (rt->rt_gateway)
return rt->rt_gateway;
return daddr;
}
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| david s. miller | david s. miller | 30 | 100.00% | 1 | 100.00% |
| Total | 30 | 100.00% | 1 | 100.00% |
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 *, struct flowi4 *flp,
int mp_hash);
static inline struct rtable *__ip_route_output_key(struct net *net,
struct flowi4 *flp)
{
return __ip_route_output_key_hash(net, flp, -1);
}
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| peter christensen | peter christensen | 30 | 100.00% | 1 | 100.00% |
| Total | 30 | 100.00% | 1 | 100.00% |
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);
}
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| david s. miller | david s. miller | 29 | 100.00% | 2 | 100.00% |
| Total | 29 | 100.00% | 2 | 100.00% |
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);
}
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| Person | Tokens | Prop | Commits | CommitProp |
| david s. miller | david s. miller | 56 | 91.80% | 2 | 66.67% |
| roland dreier | roland dreier | 5 | 8.20% | 1 | 33.33% |
| Total | 61 | 100.00% | 3 | 100.00% |
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);
if (sk)
security_sk_classify_flow(sk, flowi4_to_flowi(fl4));
return ip_route_output_flow(net, fl4, sk);
}
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| Person | Tokens | Prop | Commits | CommitProp |
| david s. miller | david s. miller | 107 | 100.00% | 4 | 100.00% |
| Total | 107 | 100.00% | 4 | 100.00% |
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);
}
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| Person | Tokens | Prop | Commits | CommitProp |
| david s. miller | david s. miller | 91 | 100.00% | 4 | 100.00% |
| Total | 91 | 100.00% | 4 | 100.00% |
int ip_route_input_noref(struct sk_buff *skb, __be32 dst, __be32 src,
u8 tos, struct net_device *devin);
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);
rcu_read_unlock();
return err;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| david s. miller | david s. miller | 63 | 100.00% | 1 | 100.00% |
| Total | 63 | 100.00% | 1 | 100.00% |
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 *);
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);
}
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| pre-git | pre-git | 20 | 58.82% | 3 | 75.00% |
| eric dumazet | eric dumazet | 14 | 41.18% | 1 | 25.00% |
| Total | 34 | 100.00% | 4 | 100.00% |
#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];
}
Contributors
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| pre-git | pre-git | 21 | 100.00% | 4 | 100.00% |
| Total | 21 | 100.00% | 4 | 100.00% |
/* 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);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| david s. miller | david s. miller | 47 | 56.63% | 3 | 23.08% |
| pre-git | pre-git | 15 | 18.07% | 5 | 38.46% |
| kovacs krisztian | kovacs krisztian | 10 | 12.05% | 1 | 7.69% |
| alexey kuznetsov | alexey kuznetsov | 7 | 8.43% | 2 | 15.38% |
| al viro | al viro | 4 | 4.82% | 2 | 15.38% |
| Total | 83 | 100.00% | 13 | 100.00% |
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 (!src && oif) {
int rc;
rc = l3mdev_get_saddr(net, oif, fl4);
if (rc < 0)
return ERR_PTR(rc);
src = fl4->saddr;
}
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);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| david s. miller | david s. miller | 90 | 47.87% | 4 | 26.67% |
| david ahern | david ahern | 41 | 21.81% | 2 | 13.33% |
| pre-git | pre-git | 18 | 9.57% | 2 | 13.33% |
| julian anastasov | julian anastasov | 17 | 9.04% | 1 | 6.67% |
| alexey kuznetsov | alexey kuznetsov | 12 | 6.38% | 2 | 13.33% |
| venkat yekkirala | venkat yekkirala | 6 | 3.19% | 1 | 6.67% |
| denis v. lunev | denis v. lunev | 4 | 2.13% | 3 | 20.00% |
| Total | 188 | 100.00% | 15 | 100.00% |
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;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| david s. miller | david s. miller | 65 | 57.52% | 7 | 43.75% |
| julian anastasov | julian anastasov | 22 | 19.47% | 1 | 6.25% |
| alexey kuznetsov | alexey kuznetsov | 12 | 10.62% | 2 | 12.50% |
| venkat yekkirala | venkat yekkirala | 6 | 5.31% | 1 | 6.25% |
| hideaki yoshifuji | hideaki yoshifuji | 3 | 2.65% | 1 | 6.25% |
| al viro | al viro | 2 | 1.77% | 1 | 6.25% |
| denis v. lunev | denis v. lunev | 2 | 1.77% | 2 | 12.50% |
| ulrich weber | ulrich weber | 1 | 0.88% | 1 | 6.25% |
| Total | 113 | 100.00% | 16 | 100.00% |
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;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| kovacs krisztian | kovacs krisztian | 15 | 36.59% | 1 | 25.00% |
| tom herbert | tom herbert | 12 | 29.27% | 1 | 25.00% |
| david s. miller | david s. miller | 11 | 26.83% | 1 | 25.00% |
| eric dumazet | eric dumazet | 3 | 7.32% | 1 | 25.00% |
| Total | 41 | 100.00% | 4 | 100.00% |
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;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| david s. miller | david s. miller | 36 | 69.23% | 1 | 50.00% |
| nikolay borisov | nikolay borisov | 16 | 30.77% | 1 | 50.00% |
| Total | 52 | 100.00% | 2 | 100.00% |
#endif /* _ROUTE_H */
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| david s. miller | david s. miller | 806 | 52.07% | 28 | 26.17% |
| pre-git | pre-git | 245 | 15.83% | 19 | 17.76% |
| david ahern | david ahern | 109 | 7.04% | 8 | 7.48% |
| julian anastasov | julian anastasov | 55 | 3.55% | 3 | 2.80% |
| linus torvalds | linus torvalds | 47 | 3.04% | 4 | 3.74% |
| alexey kuznetsov | alexey kuznetsov | 44 | 2.84% | 4 | 3.74% |
| peter christensen | peter christensen | 37 | 2.39% | 1 | 0.93% |
| eric dumazet | eric dumazet | 33 | 2.13% | 7 | 6.54% |
| kovacs krisztian | kovacs krisztian | 26 | 1.68% | 2 | 1.87% |
| denis v. lunev | denis v. lunev | 21 | 1.36% | 5 | 4.67% |
| nikolay borisov | nikolay borisov | 16 | 1.03% | 1 | 0.93% |
| laszlo attila toth | laszlo attila toth | 15 | 0.97% | 2 | 1.87% |
| venkat yekkirala | venkat yekkirala | 15 | 0.97% | 1 | 0.93% |
| tom herbert | tom herbert | 12 | 0.78% | 1 | 0.93% |
| jamal hadi salim | jamal hadi salim | 11 | 0.71% | 1 | 0.93% |
| al viro | al viro | 10 | 0.65% | 5 | 4.67% |
| eric w. biederman | eric w. biederman | 10 | 0.65% | 1 | 0.93% |
| francesco fusco | francesco fusco | 9 | 0.58% | 1 | 0.93% |
| hannes frederic sowa | hannes frederic sowa | 5 | 0.32% | 1 | 0.93% |
| roland dreier | roland dreier | 5 | 0.32% | 1 | 0.93% |
| elueck at de.ibm.com | elueck at de.ibm.com | 4 | 0.26% | 1 | 0.93% |
| hideaki yoshifuji | hideaki yoshifuji | 3 | 0.19% | 1 | 0.93% |
| steffen klassert | steffen klassert | 2 | 0.13% | 1 | 0.93% |
| ulrich weber | ulrich weber | 1 | 0.06% | 1 | 0.93% |
| arnaldo carvalho de melo | arnaldo carvalho de melo | 1 | 0.06% | 1 | 0.93% |
| stephen hemminger | stephen hemminger | 1 | 0.06% | 1 | 0.93% |
| tejun heo | tejun heo | 1 | 0.06% | 1 | 0.93% |
| hirofumi ogawa | hirofumi ogawa | 1 | 0.06% | 1 | 0.93% |
| philippe de muyter | philippe de muyter | 1 | 0.06% | 1 | 0.93% |
| thomas graf | thomas graf | 1 | 0.06% | 1 | 0.93% |
| jesper juhl | jesper juhl | 1 | 0.06% | 1 | 0.93% |
| Total | 1548 | 100.00% | 107 | 100.00% |
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