mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-10-29 23:53:32 +00:00
fa55a7d745
An ICMP error message can contain in its message body part of an IPv6 packet which invoked the error. Such a packet might contain a segment router header. Export get_srh() so the ICMP code can make use of it. Since his changes the scope of the function from local to global, add the seg6_ prefix to keep the namespace clean. And move it into seg6.c so it is always available, not just when IPV6_SEG6_LWTUNNEL is enabled. Signed-off-by: Andrew Lunn <andrew@lunn.ch> Reviewed-by: David Ahern <dsahern@kernel.org> Reviewed-by: Willem de Bruijn <willemb@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
67 lines
1.7 KiB
C
67 lines
1.7 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
|
|
/*
|
|
* SR-IPv6 implementation
|
|
*
|
|
* Author:
|
|
* David Lebrun <david.lebrun@uclouvain.be>
|
|
*/
|
|
|
|
#ifndef _NET_SEG6_H
|
|
#define _NET_SEG6_H
|
|
|
|
#include <linux/net.h>
|
|
#include <linux/ipv6.h>
|
|
#include <linux/seg6.h>
|
|
#include <linux/rhashtable-types.h>
|
|
|
|
static inline void update_csum_diff4(struct sk_buff *skb, __be32 from,
|
|
__be32 to)
|
|
{
|
|
__be32 diff[] = { ~from, to };
|
|
|
|
skb->csum = ~csum_partial((char *)diff, sizeof(diff), ~skb->csum);
|
|
}
|
|
|
|
static inline void update_csum_diff16(struct sk_buff *skb, __be32 *from,
|
|
__be32 *to)
|
|
{
|
|
__be32 diff[] = {
|
|
~from[0], ~from[1], ~from[2], ~from[3],
|
|
to[0], to[1], to[2], to[3],
|
|
};
|
|
|
|
skb->csum = ~csum_partial((char *)diff, sizeof(diff), ~skb->csum);
|
|
}
|
|
|
|
struct seg6_pernet_data {
|
|
struct mutex lock;
|
|
struct in6_addr __rcu *tun_src;
|
|
#ifdef CONFIG_IPV6_SEG6_HMAC
|
|
struct rhashtable hmac_infos;
|
|
#endif
|
|
};
|
|
|
|
static inline struct seg6_pernet_data *seg6_pernet(struct net *net)
|
|
{
|
|
#if IS_ENABLED(CONFIG_IPV6)
|
|
return net->ipv6.seg6_data;
|
|
#else
|
|
return NULL;
|
|
#endif
|
|
}
|
|
|
|
extern int seg6_init(void);
|
|
extern void seg6_exit(void);
|
|
extern int seg6_iptunnel_init(void);
|
|
extern void seg6_iptunnel_exit(void);
|
|
extern int seg6_local_init(void);
|
|
extern void seg6_local_exit(void);
|
|
|
|
extern bool seg6_validate_srh(struct ipv6_sr_hdr *srh, int len, bool reduced);
|
|
extern struct ipv6_sr_hdr *seg6_get_srh(struct sk_buff *skb, int flags);
|
|
extern int seg6_do_srh_encap(struct sk_buff *skb, struct ipv6_sr_hdr *osrh,
|
|
int proto);
|
|
extern int seg6_do_srh_inline(struct sk_buff *skb, struct ipv6_sr_hdr *osrh);
|
|
extern int seg6_lookup_nexthop(struct sk_buff *skb, struct in6_addr *nhaddr,
|
|
u32 tbl_id);
|
|
#endif
|