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486cdf2158
The seg6local LWT provides the End.DT6 action, which allows to decapsulate an outer IPv6 header containing a Segment Routing Header (SRH), full specification is available here: https://tools.ietf.org/html/draft-filsfils-spring-srv6-network-programming-05 This patch adds this action now to the seg6local BPF interface. Since it is not mandatory that the inner IPv6 header also contains a SRH, seg6_bpf_srh_state has been extended with a pointer to a possible SRH of the outermost IPv6 header. This helps assessing if the validation must be triggered or not, and avoids some calls to ipv6_find_hdr. v3: s/1/true, s/0/false for boolean values v2: - changed true/false -> 1/0 - preempt_enable no longer called in first conditional block Signed-off-by: Mathieu Xhonneux <m.xhonneux@gmail.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
35 lines
870 B
C
35 lines
870 B
C
/*
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* SR-IPv6 implementation
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*
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* Authors:
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* David Lebrun <david.lebrun@uclouvain.be>
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* eBPF support: Mathieu Xhonneux <m.xhonneux@gmail.com>
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*
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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#ifndef _NET_SEG6_LOCAL_H
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#define _NET_SEG6_LOCAL_H
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#include <linux/percpu.h>
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#include <linux/net.h>
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#include <linux/ipv6.h>
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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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extern bool seg6_bpf_has_valid_srh(struct sk_buff *skb);
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struct seg6_bpf_srh_state {
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struct ipv6_sr_hdr *srh;
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u16 hdrlen;
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bool valid;
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};
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DECLARE_PER_CPU(struct seg6_bpf_srh_state, seg6_bpf_srh_states);
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#endif
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