]>
Commit | Line | Data |
---|---|---|
e2be04c7 | 1 | /* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */ |
6c8702c6 DL |
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 | ||
ea3ebc73 DL |
18 | #include <linux/seg6.h> /* For struct ipv6_sr_hdr. */ |
19 | ||
6c8702c6 DL |
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, | |
38ee7f2d | 37 | SEG6_IPTUN_MODE_L2ENCAP, |
6c8702c6 DL |
38 | }; |
39 | ||
a50a05f4 DL |
40 | #ifdef __KERNEL__ |
41 | ||
6c8702c6 DL |
42 | static inline size_t seg6_lwt_headroom(struct seg6_iptunnel_encap *tuninfo) |
43 | { | |
38ee7f2d DL |
44 | int head = 0; |
45 | ||
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; | |
6c8702c6 DL |
57 | } |
58 | ||
59 | #endif | |
a50a05f4 DL |
60 | |
61 | #endif |