ip6_route.h | Explore in Territory

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _NET_IP6_ROUTE_H
#define _NET_IP6_ROUTE_H

#include <net/addrconf.h>
#include <net/flow.h>
#include <net/ip6_fib.h>
#include <net/sock.h>
#include <net/lwtunnel.h>
#include <linux/ip.h>
#include <linux/ipv6.h>
#include <linux/route.h>
#include <net/nexthop.h>

struct route_info { … };

#define RT6_LOOKUP_F_IFACE …
#define RT6_LOOKUP_F_REACHABLE …
#define RT6_LOOKUP_F_HAS_SADDR …
#define RT6_LOOKUP_F_SRCPREF_TMP …
#define RT6_LOOKUP_F_SRCPREF_PUBLIC …
#define RT6_LOOKUP_F_SRCPREF_COA …
#define RT6_LOOKUP_F_IGNORE_LINKSTATE …
#define RT6_LOOKUP_F_DST_NOREF …

/* We do not (yet ?) support IPv6 jumbograms (RFC 2675)
 * Unlike IPv4, hdr->seg_len doesn't include the IPv6 header
 */
#define IP6_MAX_MTU …

/*
 * rt6_srcprefs2flags() and rt6_flags2srcprefs() translate
 * between IPV6_ADDR_PREFERENCES socket option values
 *	IPV6_PREFER_SRC_TMP    = 0x1
 *	IPV6_PREFER_SRC_PUBLIC = 0x2
 *	IPV6_PREFER_SRC_COA    = 0x4
 * and above RT6_LOOKUP_F_SRCPREF_xxx flags.
 */
static inline int rt6_srcprefs2flags(unsigned int srcprefs)
{ … }

static inline unsigned int rt6_flags2srcprefs(int flags)
{ … }

static inline bool rt6_need_strict(const struct in6_addr *daddr)
{ … }

/* fib entries using a nexthop object can not be coalesced into
 * a multipath route
 */
static inline bool rt6_qualify_for_ecmp(const struct fib6_info *f6i)
{ … }

void ip6_route_input(struct sk_buff *skb);
struct dst_entry *ip6_route_input_lookup(struct net *net,
					 struct net_device *dev,
					 struct flowi6 *fl6,
					 const struct sk_buff *skb, int flags);

struct dst_entry *ip6_route_output_flags(struct net *net, const struct sock *sk,
					 struct flowi6 *fl6, int flags);

static inline struct dst_entry *ip6_route_output(struct net *net,
						 const struct sock *sk,
						 struct flowi6 *fl6)
{ … }

/* Only conditionally release dst if flags indicates
 * !RT6_LOOKUP_F_DST_NOREF or dst is in uncached_list.
 */
static inline void ip6_rt_put_flags(struct rt6_info *rt, int flags)
{ … }

struct dst_entry *ip6_route_lookup(struct net *net, struct flowi6 *fl6,
				   const struct sk_buff *skb, int flags);
struct rt6_info *ip6_pol_route(struct net *net, struct fib6_table *table,
			       int ifindex, struct flowi6 *fl6,
			       const struct sk_buff *skb, int flags);

void ip6_route_init_special_entries(void);
int ip6_route_init(void);
void ip6_route_cleanup(void);

int ipv6_route_ioctl(struct net *net, unsigned int cmd,
		struct in6_rtmsg *rtmsg);

int ip6_route_add(struct fib6_config *cfg, gfp_t gfp_flags,
		  struct netlink_ext_ack *extack);
int ip6_ins_rt(struct net *net, struct fib6_info *f6i);
int ip6_del_rt(struct net *net, struct fib6_info *f6i, bool skip_notify);

void rt6_flush_exceptions(struct fib6_info *f6i);
void rt6_age_exceptions(struct fib6_info *f6i, struct fib6_gc_args *gc_args,
			unsigned long now);

static inline int ip6_route_get_saddr(struct net *net, struct fib6_info *f6i,
				      const struct in6_addr *daddr,
				      unsigned int prefs, int l3mdev_index,
				      struct in6_addr *saddr)
{ … }

struct rt6_info *rt6_lookup(struct net *net, const struct in6_addr *daddr,
			    const struct in6_addr *saddr, int oif,
			    const struct sk_buff *skb, int flags);
u32 rt6_multipath_hash(const struct net *net, const struct flowi6 *fl6,
		       const struct sk_buff *skb, struct flow_keys *hkeys);

struct dst_entry *icmp6_dst_alloc(struct net_device *dev, struct flowi6 *fl6);

void fib6_force_start_gc(struct net *net);

struct fib6_info *addrconf_f6i_alloc(struct net *net, struct inet6_dev *idev,
				     const struct in6_addr *addr, bool anycast,
				     gfp_t gfp_flags, struct netlink_ext_ack *extack);

struct rt6_info *ip6_dst_alloc(struct net *net, struct net_device *dev,
			       int flags);

/*
 *	support functions for ND
 *
 */
struct fib6_info *rt6_get_dflt_router(struct net *net,
				     const struct in6_addr *addr,
				     struct net_device *dev);
struct fib6_info *rt6_add_dflt_router(struct net *net,
				     const struct in6_addr *gwaddr,
				     struct net_device *dev, unsigned int pref,
				     u32 defrtr_usr_metric,
				     int lifetime);

void rt6_purge_dflt_routers(struct net *net);

int rt6_route_rcv(struct net_device *dev, u8 *opt, int len,
		  const struct in6_addr *gwaddr);

void ip6_update_pmtu(struct sk_buff *skb, struct net *net, __be32 mtu, int oif,
		     u32 mark, kuid_t uid);
void ip6_sk_update_pmtu(struct sk_buff *skb, struct sock *sk, __be32 mtu);
void ip6_redirect(struct sk_buff *skb, struct net *net, int oif, u32 mark,
		  kuid_t uid);
void ip6_redirect_no_header(struct sk_buff *skb, struct net *net, int oif);
void ip6_sk_redirect(struct sk_buff *skb, struct sock *sk);

struct netlink_callback;

struct rt6_rtnl_dump_arg { … };

int rt6_dump_route(struct fib6_info *f6i, void *p_arg, unsigned int skip);
void rt6_mtu_change(struct net_device *dev, unsigned int mtu);
void rt6_remove_prefsrc(struct inet6_ifaddr *ifp);
void rt6_clean_tohost(struct net *net, struct in6_addr *gateway);
void rt6_sync_up(struct net_device *dev, unsigned char nh_flags);
void rt6_disable_ip(struct net_device *dev, unsigned long event);
void rt6_sync_down_dev(struct net_device *dev, unsigned long event);
void rt6_multipath_rebalance(struct fib6_info *f6i);

void rt6_uncached_list_add(struct rt6_info *rt);
void rt6_uncached_list_del(struct rt6_info *rt);

static inline const struct rt6_info *skb_rt6_info(const struct sk_buff *skb)
{ … }

/*
 *	Store a destination cache entry in a socket
 */
static inline void ip6_dst_store(struct sock *sk, struct dst_entry *dst,
				 const struct in6_addr *daddr,
				 const struct in6_addr *saddr)
{ … }

void ip6_sk_dst_store_flow(struct sock *sk, struct dst_entry *dst,
			   const struct flowi6 *fl6);

static inline bool ipv6_unicast_destination(const struct sk_buff *skb)
{ … }

static inline bool ipv6_anycast_destination(const struct dst_entry *dst,
					    const struct in6_addr *daddr)
{ … }

int ip6_fragment(struct net *net, struct sock *sk, struct sk_buff *skb,
		 int (*output)(struct net *, struct sock *, struct sk_buff *));

static inline unsigned int ip6_skb_dst_mtu(const struct sk_buff *skb)
{ … }

static inline bool ip6_sk_accept_pmtu(const struct sock *sk)
{ … }

static inline bool ip6_sk_ignore_df(const struct sock *sk)
{ … }

static inline const struct in6_addr *rt6_nexthop(const struct rt6_info *rt,
						 const struct in6_addr *daddr)
{ … }

static inline bool rt6_duplicate_nexthop(struct fib6_info *a, struct fib6_info *b)
{ … }

static inline unsigned int ip6_dst_mtu_maybe_forward(const struct dst_entry *dst,
						     bool forwarding)
{ … }

u32 ip6_mtu_from_fib6(const struct fib6_result *res,
		      const struct in6_addr *daddr,
		      const struct in6_addr *saddr);

struct neighbour *ip6_neigh_lookup(const struct in6_addr *gw,
				   struct net_device *dev, struct sk_buff *skb,
				   const void *daddr);
#endif
linux/include/net/ip6_route.h
