| Jakub Kicinski | c869f77 | 2015-05-26 11:16:00 +0200 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2014 Felix Fietkau <nbd@openwrt.org> |
| 3 | * |
| 4 | * This program is free software; you can redistribute it and/or modify |
| 5 | * it under the terms of the GNU General Public License version 2 |
| 6 | * as published by the Free Software Foundation |
| 7 | * |
| 8 | * This program is distributed in the hope that it will be useful, |
| 9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 11 | * GNU General Public License for more details. |
| 12 | */ |
| 13 | |
| 14 | #include "mt7601u.h" |
| 15 | |
| 16 | void mt76_remove_hdr_pad(struct sk_buff *skb) |
| 17 | { |
| 18 | int len = ieee80211_get_hdrlen_from_skb(skb); |
| 19 | |
| 20 | memmove(skb->data + 2, skb->data, len); |
| 21 | skb_pull(skb, 2); |
| 22 | } |
| 23 | |
| 24 | int mt76_insert_hdr_pad(struct sk_buff *skb) |
| 25 | { |
| 26 | int len = ieee80211_get_hdrlen_from_skb(skb); |
| 27 | int ret; |
| 28 | |
| 29 | if (len % 4 == 0) |
| 30 | return 0; |
| 31 | |
| 32 | ret = skb_cow(skb, 2); |
| 33 | if (ret) |
| 34 | return ret; |
| 35 | |
| 36 | skb_push(skb, 2); |
| 37 | memmove(skb->data, skb->data + 2, len); |
| 38 | |
| 39 | skb->data[len] = 0; |
| 40 | skb->data[len + 1] = 0; |
| 41 | return 0; |
| 42 | } |