| David Lebrun | 1ababeb | 2016-11-08 14:57:39 +0100 | [diff] [blame^] | 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 _NET_SEG6_H |
| 15 | #define _NET_SEG6_H |
| 16 | |
| 17 | static inline void update_csum_diff4(struct sk_buff *skb, __be32 from, |
| 18 | __be32 to) |
| 19 | { |
| 20 | __be32 diff[] = { ~from, to }; |
| 21 | |
| 22 | skb->csum = ~csum_partial((char *)diff, sizeof(diff), ~skb->csum); |
| 23 | } |
| 24 | |
| 25 | static inline void update_csum_diff16(struct sk_buff *skb, __be32 *from, |
| 26 | __be32 *to) |
| 27 | { |
| 28 | __be32 diff[] = { |
| 29 | ~from[0], ~from[1], ~from[2], ~from[3], |
| 30 | to[0], to[1], to[2], to[3], |
| 31 | }; |
| 32 | |
| 33 | skb->csum = ~csum_partial((char *)diff, sizeof(diff), ~skb->csum); |
| 34 | } |
| 35 | |
| 36 | #endif |