| David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame^] | 1 | /* SPDX-License-Identifier: GPL-2.0-or-later */ |
| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 2 | /* |
| 3 | * SR-IPv6 implementation |
| 4 | * |
| 5 | * Author: |
| 6 | * David Lebrun <david.lebrun@uclouvain.be> |
| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 7 | */ |
| 8 | |
| 9 | #ifndef _NET_SEG6_H |
| 10 | #define _NET_SEG6_H |
| 11 | |
| 12 | #include <linux/net.h> |
| 13 | #include <linux/ipv6.h> |
| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 14 | #include <linux/seg6.h> |
| 15 | #include <linux/rhashtable-types.h> |
| 16 | |
| 17 | static inline void update_csum_diff4(struct sk_buff *skb, __be32 from, |
| 18 | __be32 to) |
| 19 | { |
| 20 | __be32 diff[] = { ~from, to }; |
| 21 | |
| 22 | skb->csum = ~csum_partial((char *)diff, sizeof(diff), ~skb->csum); |
| 23 | } |
| 24 | |
| 25 | static inline void update_csum_diff16(struct sk_buff *skb, __be32 *from, |
| 26 | __be32 *to) |
| 27 | { |
| 28 | __be32 diff[] = { |
| 29 | ~from[0], ~from[1], ~from[2], ~from[3], |
| 30 | to[0], to[1], to[2], to[3], |
| 31 | }; |
| 32 | |
| 33 | skb->csum = ~csum_partial((char *)diff, sizeof(diff), ~skb->csum); |
| 34 | } |
| 35 | |
| 36 | struct seg6_pernet_data { |
| 37 | struct mutex lock; |
| 38 | struct in6_addr __rcu *tun_src; |
| 39 | #ifdef CONFIG_IPV6_SEG6_HMAC |
| 40 | struct rhashtable hmac_infos; |
| 41 | #endif |
| 42 | }; |
| 43 | |
| 44 | static inline struct seg6_pernet_data *seg6_pernet(struct net *net) |
| 45 | { |
| 46 | #if IS_ENABLED(CONFIG_IPV6) |
| 47 | return net->ipv6.seg6_data; |
| 48 | #else |
| 49 | return NULL; |
| 50 | #endif |
| 51 | } |
| 52 | |
| 53 | extern int seg6_init(void); |
| 54 | extern void seg6_exit(void); |
| 55 | extern int seg6_iptunnel_init(void); |
| 56 | extern void seg6_iptunnel_exit(void); |
| 57 | extern int seg6_local_init(void); |
| 58 | extern void seg6_local_exit(void); |
| 59 | |
| 60 | extern bool seg6_validate_srh(struct ipv6_sr_hdr *srh, int len); |
| 61 | extern int seg6_do_srh_encap(struct sk_buff *skb, struct ipv6_sr_hdr *osrh, |
| 62 | int proto); |
| 63 | extern int seg6_do_srh_inline(struct sk_buff *skb, struct ipv6_sr_hdr *osrh); |
| 64 | extern int seg6_lookup_nexthop(struct sk_buff *skb, struct in6_addr *nhaddr, |
| 65 | u32 tbl_id); |
| 66 | #endif |