Greg Kroah-Hartman | e2be04c | 2017-11-01 15:09:13 +0100 | [diff] [blame] | 1 | /* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */ |
David Lebrun | 6c8702c | 2016-11-08 14:57:41 +0100 | [diff] [blame] | 2 | /* |
| 3 | * SR-IPv6 implementation |
| 4 | * |
| 5 | * Author: |
| 6 | * David Lebrun <david.lebrun@uclouvain.be> |
| 7 | * |
| 8 | * |
| 9 | * This program is free software; you can redistribute it and/or |
| 10 | * modify it under the terms of the GNU General Public License |
| 11 | * as published by the Free Software Foundation; either version |
| 12 | * 2 of the License, or (at your option) any later version. |
| 13 | */ |
| 14 | |
| 15 | #ifndef _UAPI_LINUX_SEG6_IPTUNNEL_H |
| 16 | #define _UAPI_LINUX_SEG6_IPTUNNEL_H |
| 17 | |
Dmitry V. Levin | ea3ebc7 | 2017-02-23 14:30:34 +0300 | [diff] [blame] | 18 | #include <linux/seg6.h> /* For struct ipv6_sr_hdr. */ |
| 19 | |
David Lebrun | 6c8702c | 2016-11-08 14:57:41 +0100 | [diff] [blame] | 20 | enum { |
| 21 | SEG6_IPTUNNEL_UNSPEC, |
| 22 | SEG6_IPTUNNEL_SRH, |
| 23 | __SEG6_IPTUNNEL_MAX, |
| 24 | }; |
| 25 | #define SEG6_IPTUNNEL_MAX (__SEG6_IPTUNNEL_MAX - 1) |
| 26 | |
| 27 | struct seg6_iptunnel_encap { |
| 28 | int mode; |
| 29 | struct ipv6_sr_hdr srh[0]; |
| 30 | }; |
| 31 | |
| 32 | #define SEG6_IPTUN_ENCAP_SIZE(x) ((sizeof(*x)) + (((x)->srh->hdrlen + 1) << 3)) |
| 33 | |
| 34 | enum { |
| 35 | SEG6_IPTUN_MODE_INLINE, |
| 36 | SEG6_IPTUN_MODE_ENCAP, |
David Lebrun | 38ee7f2 | 2017-08-25 09:56:45 +0200 | [diff] [blame] | 37 | SEG6_IPTUN_MODE_L2ENCAP, |
David Lebrun | 6c8702c | 2016-11-08 14:57:41 +0100 | [diff] [blame] | 38 | }; |
| 39 | |
David Lebrun | a50a05f | 2017-01-15 15:26:16 +0100 | [diff] [blame] | 40 | #ifdef __KERNEL__ |
| 41 | |
David Lebrun | 6c8702c | 2016-11-08 14:57:41 +0100 | [diff] [blame] | 42 | static inline size_t seg6_lwt_headroom(struct seg6_iptunnel_encap *tuninfo) |
| 43 | { |
David Lebrun | 38ee7f2 | 2017-08-25 09:56:45 +0200 | [diff] [blame] | 44 | int head = 0; |
David Lebrun | 6c8702c | 2016-11-08 14:57:41 +0100 | [diff] [blame] | 45 | |
David Lebrun | 38ee7f2 | 2017-08-25 09:56:45 +0200 | [diff] [blame] | 46 | switch (tuninfo->mode) { |
| 47 | case SEG6_IPTUN_MODE_INLINE: |
| 48 | break; |
| 49 | case SEG6_IPTUN_MODE_ENCAP: |
| 50 | head = sizeof(struct ipv6hdr); |
| 51 | break; |
| 52 | case SEG6_IPTUN_MODE_L2ENCAP: |
| 53 | return 0; |
| 54 | } |
| 55 | |
| 56 | return ((tuninfo->srh->hdrlen + 1) << 3) + head; |
David Lebrun | 6c8702c | 2016-11-08 14:57:41 +0100 | [diff] [blame] | 57 | } |
| 58 | |
| 59 | #endif |
David Lebrun | a50a05f | 2017-01-15 15:26:16 +0100 | [diff] [blame] | 60 | |
| 61 | #endif |