From: Johannes Berg <[email protected]> In order to be able to properly record SKBs that didn't come through mac80211, don't rely on the IEEE80211_TX_CTRL_PORT_CTRL_PROTO flag but instead check for ETH_P_PAE directly.
Signed-off-by: Johannes Berg <[email protected]> Signed-off-by: Luca Coelho <[email protected]> --- drivers/net/wireless/intel/iwlwifi/iwl-devtrace.h | 25 ++++++++++++++++++++--- 1 file changed, 22 insertions(+), 3 deletions(-) diff --git a/drivers/net/wireless/intel/iwlwifi/iwl-devtrace.h b/drivers/net/wireless/intel/iwlwifi/iwl-devtrace.h index f4d3cd0..545d14b 100644 --- a/drivers/net/wireless/intel/iwlwifi/iwl-devtrace.h +++ b/drivers/net/wireless/intel/iwlwifi/iwl-devtrace.h @@ -1,6 +1,7 @@ /****************************************************************************** * * Copyright(c) 2009 - 2014 Intel Corporation. All rights reserved. + * Copyright(C) 2016 Intel Deutschland GmbH * * This program is free software; you can redistribute it and/or modify it * under the terms of version 2 of the GNU General Public License as @@ -33,11 +34,29 @@ static inline bool iwl_trace_data(struct sk_buff *skb) { struct ieee80211_hdr *hdr = (void *)skb->data; - struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); + __le16 fc = hdr->frame_control; + int offs = 24; /* start with normal header length */ - if (!ieee80211_is_data(hdr->frame_control)) + if (!ieee80211_is_data(fc)) return false; - return !(info->control.flags & IEEE80211_TX_CTRL_PORT_CTRL_PROTO); + + /* Try to determine if the frame is EAPOL. This might have false + * positives (if there's no RFC 1042 header and we compare to some + * payload instead) but since we're only doing tracing that's not + * a problem. + */ + + if (ieee80211_has_a4(fc)) + offs += 6; + if (ieee80211_is_data_qos(fc)) + offs += 2; + /* don't account for crypto - these are unencrypted */ + + /* also account for the RFC 1042 header, of course */ + offs += 6; + + return skb->len > offs + 2 && + *(__be16 *)(skb->data + offs) == cpu_to_be16(ETH_P_PAE); } static inline size_t iwl_rx_trace_len(const struct iwl_trans *trans, -- 2.8.1 -- To unsubscribe from this list: send the line "unsubscribe linux-wireless" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
