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87 lines
2.2 KiB
87 lines
2.2 KiB
/* SPDX-License-Identifier: GPL-2.0-or-later */ |
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/* |
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* SR-IPv6 implementation |
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* |
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* Author: |
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* David Lebrun <[email protected]> |
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*/ |
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#ifndef _NET_SEG6_H |
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#define _NET_SEG6_H |
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#include <linux/net.h> |
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#include <linux/ipv6.h> |
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#include <linux/seg6.h> |
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#include <linux/rhashtable-types.h> |
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static inline void update_csum_diff4(struct sk_buff *skb, __be32 from, |
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__be32 to) |
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{ |
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__be32 diff[] = { ~from, to }; |
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skb->csum = ~csum_partial((char *)diff, sizeof(diff), ~skb->csum); |
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} |
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static inline void update_csum_diff16(struct sk_buff *skb, __be32 *from, |
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__be32 *to) |
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{ |
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__be32 diff[] = { |
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~from[0], ~from[1], ~from[2], ~from[3], |
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to[0], to[1], to[2], to[3], |
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}; |
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skb->csum = ~csum_partial((char *)diff, sizeof(diff), ~skb->csum); |
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} |
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struct seg6_pernet_data { |
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struct mutex lock; |
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struct in6_addr __rcu *tun_src; |
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#ifdef CONFIG_IPV6_SEG6_HMAC |
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struct rhashtable hmac_infos; |
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#endif |
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}; |
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static inline struct seg6_pernet_data *seg6_pernet(struct net *net) |
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{ |
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#if IS_ENABLED(CONFIG_IPV6) |
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return net->ipv6.seg6_data; |
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#else |
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return NULL; |
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#endif |
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} |
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extern int seg6_init(void); |
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extern void seg6_exit(void); |
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extern int seg6_iptunnel_init(void); |
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extern void seg6_iptunnel_exit(void); |
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extern int seg6_local_init(void); |
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extern void seg6_local_exit(void); |
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extern bool seg6_validate_srh(struct ipv6_sr_hdr *srh, int len, bool reduced); |
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extern struct ipv6_sr_hdr *seg6_get_srh(struct sk_buff *skb, int flags); |
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extern void seg6_icmp_srh(struct sk_buff *skb, struct inet6_skb_parm *opt); |
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extern int seg6_do_srh_encap(struct sk_buff *skb, struct ipv6_sr_hdr *osrh, |
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int proto); |
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extern int seg6_do_srh_inline(struct sk_buff *skb, struct ipv6_sr_hdr *osrh); |
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extern int seg6_lookup_nexthop(struct sk_buff *skb, struct in6_addr *nhaddr, |
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u32 tbl_id); |
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/* If the packet which invoked an ICMP error contains an SRH return |
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* the true destination address from within the SRH, otherwise use the |
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* destination address in the IP header. |
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*/ |
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static inline const struct in6_addr *seg6_get_daddr(struct sk_buff *skb, |
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struct inet6_skb_parm *opt) |
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{ |
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struct ipv6_sr_hdr *srh; |
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if (opt->flags & IP6SKB_SEG6) { |
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srh = (struct ipv6_sr_hdr *)(skb->data + opt->srhoff); |
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return &srh->segments[0]; |
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} |
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return NULL; |
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} |
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#endif
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