Return-path: Received: from nick.hrz.tu-chemnitz.de ([134.109.228.11]:58581 "EHLO nick.hrz.tu-chemnitz.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754774Ab3GKOJS (ORCPT ); Thu, 11 Jul 2013 10:09:18 -0400 From: Simon Wunderlich To: Johannes Berg Cc: linux-wireless@vger.kernel.org, Mathias Kretschmer , Simon Wunderlich Subject: [PATCHv5 2/4] mac80211: add functions to duplicate a cfg80211_beacon Date: Thu, 11 Jul 2013 16:09:06 +0200 Message-Id: <1373551749-5107-3-git-send-email-siwu@hrz.tu-chemnitz.de> (sfid-20130711_160924_183421_4F863C05) In-Reply-To: <1373551749-5107-1-git-send-email-siwu@hrz.tu-chemnitz.de> References: <1373551749-5107-1-git-send-email-siwu@hrz.tu-chemnitz.de> Sender: linux-wireless-owner@vger.kernel.org List-ID: For the channel switch announcement, it is required to set a new beacon after the driver arrived on the new channel. The new beacon will be set by nl80211, but is required to duplicate the beacon as the original memory within the netlink message will be gone. Signed-off-by: Simon Wunderlich Signed-off-by: Mathias Kretschmer --- Changes to PATCHv2: * allocate only one memory chunk --- net/mac80211/cfg.c | 56 ++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 56 insertions(+) diff --git a/net/mac80211/cfg.c b/net/mac80211/cfg.c index b82fff6..8e6c935 100644 --- a/net/mac80211/cfg.c +++ b/net/mac80211/cfg.c @@ -2775,6 +2775,62 @@ static int ieee80211_start_radar_detection(struct wiphy *wiphy, return 0; } +static struct cfg80211_beacon_data * +cfg80211_beacon_dup(struct cfg80211_beacon_data *beacon) +{ + struct cfg80211_beacon_data *new_beacon; + u8 *pos; + int len; + + len = beacon->head_len + beacon->tail_len + beacon->beacon_ies_len + + beacon->proberesp_ies_len + beacon->assocresp_ies_len + + beacon->probe_resp_len; + + new_beacon = kzalloc(sizeof(*new_beacon) + len, GFP_KERNEL); + if (!new_beacon) + return NULL; + + pos = (u8 *)(new_beacon + 1); + if (beacon->head_len) { + new_beacon->head_len = beacon->head_len; + new_beacon->head = pos; + memcpy(pos, beacon->head, beacon->head_len); + pos += beacon->head_len; + } + if (beacon->tail_len) { + new_beacon->tail_len = beacon->tail_len; + new_beacon->tail = pos; + memcpy(pos, beacon->tail, beacon->tail_len); + pos += beacon->tail_len; + } + if (beacon->beacon_ies_len) { + new_beacon->beacon_ies_len = beacon->beacon_ies_len; + new_beacon->beacon_ies = pos; + memcpy(pos, beacon->beacon_ies, beacon->beacon_ies_len); + pos += beacon->beacon_ies_len; + } + if (beacon->proberesp_ies_len) { + new_beacon->proberesp_ies_len = beacon->proberesp_ies_len; + new_beacon->proberesp_ies = pos; + memcpy(pos, beacon->proberesp_ies, beacon->proberesp_ies_len); + pos += beacon->proberesp_ies_len; + } + if (beacon->assocresp_ies_len) { + new_beacon->assocresp_ies_len = beacon->assocresp_ies_len; + new_beacon->assocresp_ies = pos; + memcpy(pos, beacon->assocresp_ies, beacon->assocresp_ies_len); + pos += beacon->assocresp_ies_len; + } + if (beacon->probe_resp_len) { + new_beacon->probe_resp_len = beacon->probe_resp_len; + beacon->probe_resp = pos; + memcpy(pos, beacon->probe_resp, beacon->probe_resp_len); + pos += beacon->probe_resp_len; + } + + return new_beacon; +} + static int ieee80211_mgmt_tx(struct wiphy *wiphy, struct wireless_dev *wdev, struct ieee80211_channel *chan, bool offchan, unsigned int wait, const u8 *buf, size_t len, -- 1.7.10.4