62 lines
1.3 KiB
C
62 lines
1.3 KiB
C
/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */
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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 <david.lebrun@uclouvain.be>
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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 _UAPI_LINUX_SEG6_IPTUNNEL_H
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#define _UAPI_LINUX_SEG6_IPTUNNEL_H
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#include <linux/seg6.h> /* For struct ipv6_sr_hdr. */
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enum {
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SEG6_IPTUNNEL_UNSPEC,
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SEG6_IPTUNNEL_SRH,
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__SEG6_IPTUNNEL_MAX,
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};
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#define SEG6_IPTUNNEL_MAX (__SEG6_IPTUNNEL_MAX - 1)
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struct seg6_iptunnel_encap {
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int mode;
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struct ipv6_sr_hdr srh[0];
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};
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#define SEG6_IPTUN_ENCAP_SIZE(x) ((sizeof(*x)) + (((x)->srh->hdrlen + 1) << 3))
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enum {
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SEG6_IPTUN_MODE_INLINE,
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SEG6_IPTUN_MODE_ENCAP,
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SEG6_IPTUN_MODE_L2ENCAP,
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};
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#ifdef __KERNEL__
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static inline size_t seg6_lwt_headroom(struct seg6_iptunnel_encap *tuninfo)
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{
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int head = 0;
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switch (tuninfo->mode) {
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case SEG6_IPTUN_MODE_INLINE:
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break;
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case SEG6_IPTUN_MODE_ENCAP:
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head = sizeof(struct ipv6hdr);
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break;
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case SEG6_IPTUN_MODE_L2ENCAP:
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return 0;
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}
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return ((tuninfo->srh->hdrlen + 1) << 3) + head;
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}
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#endif
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#endif
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