projects / thirdparty / kernel / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 2874c5fd | 1 | /* SPDX-License-Identifier: GPL-2.0-or-later */ |
| 1ababeba DL |
2 | /* |
| 3 | * SR-IPv6 implementation | |
| 4 | * | |
| 5 | * Author: | |
| 6 | * David Lebrun <david.lebrun@uclouvain.be> | |
| 1ababeba DL |
7 | */ |
| 8 | ||
| 9 | #ifndef _NET_SEG6_H | |
| 10 | #define _NET_SEG6_H | |
| 11 | ||
| 915d7e5e DL |
12 | #include <linux/net.h> |
| 13 | #include <linux/ipv6.h> | |
| 6c8702c6 | 14 | #include <linux/seg6.h> |
| 0eb71a9d | 15 | #include <linux/rhashtable-types.h> |
| 915d7e5e | 16 | |
| 1ababeba DL |
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 | ||
| 915d7e5e DL |
36 | struct seg6_pernet_data { |
| 37 | struct mutex lock; | |
| 38 | struct in6_addr __rcu *tun_src; | |
| bf355b8d DL |
39 | #ifdef CONFIG_IPV6_SEG6_HMAC |
| 40 | struct rhashtable hmac_infos; | |
| 41 | #endif | |
| 915d7e5e DL |
42 | }; |
| 43 | ||
| 44 | static inline struct seg6_pernet_data *seg6_pernet(struct net *net) | |
| 45 | { | |
| 63526e1c | 46 | #if IS_ENABLED(CONFIG_IPV6) |
| 915d7e5e | 47 | return net->ipv6.seg6_data; |
| 63526e1c MX |
48 | #else |
| 49 | return NULL; | |
| 50 | #endif | |
| 915d7e5e DL |
51 | } |
| 52 | ||
| 53 | extern int seg6_init(void); | |
| 54 | extern void seg6_exit(void); | |
| 6c8702c6 DL |
55 | extern int seg6_iptunnel_init(void); |
| 56 | extern void seg6_iptunnel_exit(void); | |
| d1df6fd8 DL |
57 | extern int seg6_local_init(void); |
| 58 | extern void seg6_local_exit(void); | |
| 6c8702c6 | 59 | |
| bb986a50 | 60 | extern bool seg6_validate_srh(struct ipv6_sr_hdr *srh, int len, bool reduced); |
| fa55a7d7 | 61 | extern struct ipv6_sr_hdr *seg6_get_srh(struct sk_buff *skb, int flags); |
| e4129440 | 62 | extern void seg6_icmp_srh(struct sk_buff *skb, struct inet6_skb_parm *opt); |
| 32d99d0b DL |
63 | extern int seg6_do_srh_encap(struct sk_buff *skb, struct ipv6_sr_hdr *osrh, |
| 64 | int proto); | |
| b04c80d3 | 65 | extern int seg6_do_srh_inline(struct sk_buff *skb, struct ipv6_sr_hdr *osrh); |
| 1c1e761e MX |
66 | extern int seg6_lookup_nexthop(struct sk_buff *skb, struct in6_addr *nhaddr, |
| 67 | u32 tbl_id); | |
| 222a011e AL |
68 | |
| 69 | /* If the packet which invoked an ICMP error contains an SRH return | |
| 70 | * the true destination address from within the SRH, otherwise use the | |
| 71 | * destination address in the IP header. | |
| 72 | */ | |
| 73 | static inline const struct in6_addr *seg6_get_daddr(struct sk_buff *skb, | |
| 74 | struct inet6_skb_parm *opt) | |
| 75 | { | |
| 76 | struct ipv6_sr_hdr *srh; | |
| 77 | ||
| 78 | if (opt->flags & IP6SKB_SEG6) { | |
| 79 | srh = (struct ipv6_sr_hdr *)(skb->data + opt->srhoff); | |
| 80 | return &srh->segments[0]; | |
| 81 | } | |
| 82 | ||
| 83 | return NULL; | |
| 84 | } | |
| 85 | ||
| 86 | ||
| 1ababeba | 87 | #endif |