projects / mirror_ubuntu-bionic-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| 6c8702c6 DL |
1 | /* |
| 2 | * SR-IPv6 implementation | |
| 3 | * | |
| 4 | * Author: | |
| 5 | * David Lebrun <david.lebrun@uclouvain.be> | |
| 6 | * | |
| 7 | * | |
| 8 | * This program is free software; you can redistribute it and/or | |
| 9 | * modify it under the terms of the GNU General Public License | |
| 10 | * as published by the Free Software Foundation; either version | |
| 11 | * 2 of the License, or (at your option) any later version. | |
| 12 | */ | |
| 13 | ||
| 14 | #ifndef _UAPI_LINUX_SEG6_IPTUNNEL_H | |
| 15 | #define _UAPI_LINUX_SEG6_IPTUNNEL_H | |
| 16 | ||
| ea3ebc73 DL |
17 | #include <linux/seg6.h> /* For struct ipv6_sr_hdr. */ |
| 18 | ||
| 6c8702c6 DL |
19 | enum { |
| 20 | SEG6_IPTUNNEL_UNSPEC, | |
| 21 | SEG6_IPTUNNEL_SRH, | |
| 22 | __SEG6_IPTUNNEL_MAX, | |
| 23 | }; | |
| 24 | #define SEG6_IPTUNNEL_MAX (__SEG6_IPTUNNEL_MAX - 1) | |
| 25 | ||
| 26 | struct seg6_iptunnel_encap { | |
| 27 | int mode; | |
| 28 | struct ipv6_sr_hdr srh[0]; | |
| 29 | }; | |
| 30 | ||
| 31 | #define SEG6_IPTUN_ENCAP_SIZE(x) ((sizeof(*x)) + (((x)->srh->hdrlen + 1) << 3)) | |
| 32 | ||
| 33 | enum { | |
| 34 | SEG6_IPTUN_MODE_INLINE, | |
| 35 | SEG6_IPTUN_MODE_ENCAP, | |
| 38ee7f2d | 36 | SEG6_IPTUN_MODE_L2ENCAP, |
| 6c8702c6 DL |
37 | }; |
| 38 | ||
| a50a05f4 DL |
39 | #ifdef __KERNEL__ |
| 40 | ||
| 6c8702c6 DL |
41 | static inline size_t seg6_lwt_headroom(struct seg6_iptunnel_encap *tuninfo) |
| 42 | { | |
| 38ee7f2d DL |
43 | int head = 0; |
| 44 | ||
| 45 | switch (tuninfo->mode) { | |
| 46 | case SEG6_IPTUN_MODE_INLINE: | |
| 47 | break; | |
| 48 | case SEG6_IPTUN_MODE_ENCAP: | |
| 49 | head = sizeof(struct ipv6hdr); | |
| 50 | break; | |
| 51 | case SEG6_IPTUN_MODE_L2ENCAP: | |
| 52 | return 0; | |
| 53 | } | |
| 54 | ||
| 55 | return ((tuninfo->srh->hdrlen + 1) << 3) + head; | |
| 6c8702c6 DL |
56 | } |
| 57 | ||
| 58 | #endif | |
| a50a05f4 DL |
59 | |
| 60 | #endif |