From: David Spinadel Date: Mon, 21 Nov 2016 14:58:40 +0000 (+0200) Subject: mac80211: Add RX flag to indicate ICV stripped X-Git-Url: http://git.osdn.net/view?a=commitdiff_plain;h=df94ad02f0aac87efdda3a33c6f3eff1c53b9a09;p=sagit-ice-cold%2Fkernel_xiaomi_msm8998.git mac80211: Add RX flag to indicate ICV stripped commit cef0acd4d7d4811d2d19cd0195031bf0dfe41249 upstream. Add a flag that indicates that the WEP ICV was stripped from an RX packet, allowing the device to not transfer that if it's already checked. Signed-off-by: David Spinadel Signed-off-by: Johannes Berg Cc: Sriram R Signed-off-by: Greg Kroah-Hartman --- diff --git a/include/net/mac80211.h b/include/net/mac80211.h index 41a87405bfb7..7a49a31f6ddc 100644 --- a/include/net/mac80211.h +++ b/include/net/mac80211.h @@ -975,7 +975,7 @@ ieee80211_tx_info_clear_status(struct ieee80211_tx_info *info) * @RX_FLAG_DECRYPTED: This frame was decrypted in hardware. * @RX_FLAG_MMIC_STRIPPED: the Michael MIC is stripped off this frame, * verification has been done by the hardware. - * @RX_FLAG_IV_STRIPPED: The IV/ICV are stripped from this frame. + * @RX_FLAG_IV_STRIPPED: The IV and ICV are stripped from this frame. * If this flag is set, the stack cannot do any replay detection * hence the driver or hardware will have to do that. * @RX_FLAG_PN_VALIDATED: Currently only valid for CCMP/GCMP frames, this @@ -1034,6 +1034,8 @@ ieee80211_tx_info_clear_status(struct ieee80211_tx_info *info) * @RX_FLAG_ALLOW_SAME_PN: Allow the same PN as same packet before. * This is used for AMSDU subframes which can have the same PN as * the first subframe. + * @RX_FLAG_ICV_STRIPPED: The ICV is stripped from this frame. CRC checking must + * be done in the hardware. */ enum mac80211_rx_flags { RX_FLAG_MMIC_ERROR = BIT(0), @@ -1066,6 +1068,7 @@ enum mac80211_rx_flags { RX_FLAG_RADIOTAP_VENDOR_DATA = BIT(31), RX_FLAG_MIC_STRIPPED = BIT_ULL(32), RX_FLAG_ALLOW_SAME_PN = BIT_ULL(33), + RX_FLAG_ICV_STRIPPED = BIT_ULL(34), }; #define RX_FLAG_STBC_SHIFT 26 diff --git a/net/mac80211/wep.c b/net/mac80211/wep.c index efa3f48f1ec5..73e8f347802e 100644 --- a/net/mac80211/wep.c +++ b/net/mac80211/wep.c @@ -293,7 +293,8 @@ ieee80211_crypto_wep_decrypt(struct ieee80211_rx_data *rx) return RX_DROP_UNUSABLE; ieee80211_wep_remove_iv(rx->local, rx->skb, rx->key); /* remove ICV */ - if (pskb_trim(rx->skb, rx->skb->len - IEEE80211_WEP_ICV_LEN)) + if (!(status->flag & RX_FLAG_ICV_STRIPPED) && + pskb_trim(rx->skb, rx->skb->len - IEEE80211_WEP_ICV_LEN)) return RX_DROP_UNUSABLE; } diff --git a/net/mac80211/wpa.c b/net/mac80211/wpa.c index c0567a866fdd..cb439e06919f 100644 --- a/net/mac80211/wpa.c +++ b/net/mac80211/wpa.c @@ -298,7 +298,8 @@ ieee80211_crypto_tkip_decrypt(struct ieee80211_rx_data *rx) return RX_DROP_UNUSABLE; /* Trim ICV */ - skb_trim(skb, skb->len - IEEE80211_TKIP_ICV_LEN); + if (!(status->flag & RX_FLAG_ICV_STRIPPED)) + skb_trim(skb, skb->len - IEEE80211_TKIP_ICV_LEN); /* Remove IV */ memmove(skb->data + IEEE80211_TKIP_IV_LEN, skb->data, hdrlen);