diff options
Diffstat (limited to 'net/mac80211/scan.c')
| -rw-r--r-- | net/mac80211/scan.c | 56 |
1 files changed, 50 insertions, 6 deletions
diff --git a/net/mac80211/scan.c b/net/mac80211/scan.c index 2e917a6d239d..5d2a11777718 100644 --- a/net/mac80211/scan.c +++ b/net/mac80211/scan.c @@ -20,6 +20,7 @@ #include <net/sch_generic.h> #include <linux/slab.h> #include <linux/export.h> +#include <linux/random.h> #include <net/mac80211.h> #include "ieee80211_i.h" @@ -293,6 +294,7 @@ static bool ieee80211_prep_hw_scan(struct ieee80211_local *local) struct cfg80211_chan_def chandef; u8 bands_used = 0; int i, ielen, n_chans; + u32 flags = 0; req = rcu_dereference_protected(local->scan_req, lockdep_is_held(&local->mtx)); @@ -331,12 +333,16 @@ static bool ieee80211_prep_hw_scan(struct ieee80211_local *local) local->hw_scan_req->req.n_channels = n_chans; ieee80211_prepare_scan_chandef(&chandef, req->scan_width); + if (req->flags & NL80211_SCAN_FLAG_MIN_PREQ_CONTENT) + flags |= IEEE80211_PROBE_FLAG_MIN_CONTENT; + ielen = ieee80211_build_preq_ies(local, (u8 *)local->hw_scan_req->req.ie, local->hw_scan_ies_bufsize, &local->hw_scan_req->ies, req->ie, req->ie_len, - bands_used, req->rates, &chandef); + bands_used, req->rates, &chandef, + flags); local->hw_scan_req->req.ie_len = ielen; local->hw_scan_req->req.no_cck = req->no_cck; ether_addr_copy(local->hw_scan_req->req.mac_addr, req->mac_addr); @@ -528,6 +534,35 @@ void ieee80211_run_deferred_scan(struct ieee80211_local *local) round_jiffies_relative(0)); } +static void ieee80211_send_scan_probe_req(struct ieee80211_sub_if_data *sdata, + const u8 *src, const u8 *dst, + const u8 *ssid, size_t ssid_len, + const u8 *ie, size_t ie_len, + u32 ratemask, u32 flags, u32 tx_flags, + struct ieee80211_channel *channel) +{ + struct sk_buff *skb; + u32 txdata_flags = 0; + + skb = ieee80211_build_probe_req(sdata, src, dst, ratemask, channel, + ssid, ssid_len, + ie, ie_len, flags); + + if (skb) { + if (flags & IEEE80211_PROBE_FLAG_RANDOM_SN) { + struct ieee80211_hdr *hdr = (void *)skb->data; + u16 sn = get_random_u32(); + + txdata_flags |= IEEE80211_TX_NO_SEQNO; + hdr->seq_ctrl = + cpu_to_le16(IEEE80211_SN_TO_SEQ(sn)); + } + IEEE80211_SKB_CB(skb)->flags |= tx_flags; + ieee80211_tx_skb_tid_band(sdata, skb, 7, channel->band, + txdata_flags); + } +} + static void ieee80211_scan_state_send_probe(struct ieee80211_local *local, unsigned long *next_delay) { @@ -535,7 +570,7 @@ static void ieee80211_scan_state_send_probe(struct ieee80211_local *local, struct ieee80211_sub_if_data *sdata; struct cfg80211_scan_request *scan_req; enum nl80211_band band = local->hw.conf.chandef.chan->band; - u32 tx_flags; + u32 flags = 0, tx_flags; scan_req = rcu_dereference_protected(local->scan_req, lockdep_is_held(&local->mtx)); @@ -543,17 +578,21 @@ static void ieee80211_scan_state_send_probe(struct ieee80211_local *local, tx_flags = IEEE80211_TX_INTFL_OFFCHAN_TX_OK; if (scan_req->no_cck) tx_flags |= IEEE80211_TX_CTL_NO_CCK_RATE; + if (scan_req->flags & NL80211_SCAN_FLAG_MIN_PREQ_CONTENT) + flags |= IEEE80211_PROBE_FLAG_MIN_CONTENT; + if (scan_req->flags & NL80211_SCAN_FLAG_RANDOM_SN) + flags |= IEEE80211_PROBE_FLAG_RANDOM_SN; sdata = rcu_dereference_protected(local->scan_sdata, lockdep_is_held(&local->mtx)); for (i = 0; i < scan_req->n_ssids; i++) - ieee80211_send_probe_req( + ieee80211_send_scan_probe_req( sdata, local->scan_addr, scan_req->bssid, scan_req->ssids[i].ssid, scan_req->ssids[i].ssid_len, scan_req->ie, scan_req->ie_len, - scan_req->rates[band], false, - tx_flags, local->hw.conf.chandef.chan, true); + scan_req->rates[band], flags, + tx_flags, local->hw.conf.chandef.chan); /* * After sending probe requests, wait for probe responses @@ -1141,6 +1180,7 @@ int __ieee80211_request_sched_scan_start(struct ieee80211_sub_if_data *sdata, u32 rate_masks[NUM_NL80211_BANDS] = {}; u8 bands_used = 0; u8 *ie; + u32 flags = 0; iebufsz = local->scan_ies_len + req->ie_len; @@ -1157,6 +1197,9 @@ int __ieee80211_request_sched_scan_start(struct ieee80211_sub_if_data *sdata, } } + if (req->flags & NL80211_SCAN_FLAG_MIN_PREQ_CONTENT) + flags |= IEEE80211_PROBE_FLAG_MIN_CONTENT; + ie = kcalloc(iebufsz, num_bands, GFP_KERNEL); if (!ie) { ret = -ENOMEM; @@ -1167,7 +1210,8 @@ int __ieee80211_request_sched_scan_start(struct ieee80211_sub_if_data *sdata, ieee80211_build_preq_ies(local, ie, num_bands * iebufsz, &sched_scan_ies, req->ie, - req->ie_len, bands_used, rate_masks, &chandef); + req->ie_len, bands_used, rate_masks, &chandef, + flags); ret = drv_sched_scan_start(local, sdata, req, &sched_scan_ies); if (ret == 0) { |