| /* |
| * Copyright (C) 2014 Felix Fietkau <nbd@openwrt.org> |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License version 2 |
| * as published by the Free Software Foundation |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| */ |
| |
| #include "mt76x0.h" |
| |
| void mt76x0_remove_hdr_pad(struct sk_buff *skb) |
| { |
| int len = ieee80211_get_hdrlen_from_skb(skb); |
| |
| memmove(skb->data + 2, skb->data, len); |
| skb_pull(skb, 2); |
| } |
| |
| int mt76x0_insert_hdr_pad(struct sk_buff *skb) |
| { |
| int len = ieee80211_get_hdrlen_from_skb(skb); |
| int ret; |
| |
| if (len % 4 == 0) |
| return 0; |
| |
| ret = skb_cow(skb, 2); |
| if (ret) |
| return ret; |
| |
| skb_push(skb, 2); |
| memmove(skb->data, skb->data + 2, len); |
| |
| skb->data[len] = 0; |
| skb->data[len + 1] = 0; |
| return 0; |
| } |
