From 8d91c1e411f55d7ea91b1183a2e9f8088fb4d5be Mon Sep 17 00:00:00 2001 From: André Fabian Silva Delgado Date: Tue, 15 Dec 2015 14:52:16 -0300 Subject: Linux-libre 4.3.2-gnu --- drivers/net/wireless/mwifiex/scan.c | 157 +++++++++++++++++++++++++++++++++--- 1 file changed, 146 insertions(+), 11 deletions(-) (limited to 'drivers/net/wireless/mwifiex/scan.c') diff --git a/drivers/net/wireless/mwifiex/scan.c b/drivers/net/wireless/mwifiex/scan.c index baf9715dd..278ec477f 100644 --- a/drivers/net/wireless/mwifiex/scan.c +++ b/drivers/net/wireless/mwifiex/scan.c @@ -527,7 +527,8 @@ mwifiex_scan_create_channel_list(struct mwifiex_private *priv, if (ch->flags & IEEE80211_CHAN_NO_IR) scan_chan_list[chan_idx].chan_scan_mode_bitmap - |= MWIFIEX_PASSIVE_SCAN; + |= (MWIFIEX_PASSIVE_SCAN | + MWIFIEX_HIDDEN_SSID_REPORT); else scan_chan_list[chan_idx].chan_scan_mode_bitmap &= ~MWIFIEX_PASSIVE_SCAN; @@ -823,6 +824,7 @@ mwifiex_config_scan(struct mwifiex_private *priv, int i; u8 ssid_filter; struct mwifiex_ie_types_htcap *ht_cap; + struct mwifiex_ie_types_bss_mode *bss_mode; /* The tlv_buf_len is calculated for each scan command. The TLVs added in this routine will be preserved since the routine that sends the @@ -908,6 +910,10 @@ mwifiex_config_scan(struct mwifiex_private *priv, wildcard_ssid_tlv->max_ssid_length = IEEE80211_MAX_SSID_LEN; + if (!memcmp(user_scan_in->ssid_list[i].ssid, + "DIRECT-", 7)) + wildcard_ssid_tlv->max_ssid_length = 0xfe; + memcpy(wildcard_ssid_tlv->ssid, user_scan_in->ssid_list[i].ssid, ssid_len); @@ -968,6 +974,15 @@ mwifiex_config_scan(struct mwifiex_private *priv, else *max_chan_per_scan = MWIFIEX_DEF_CHANNELS_PER_SCAN_CMD; + if (adapter->ext_scan) { + bss_mode = (struct mwifiex_ie_types_bss_mode *)tlv_pos; + bss_mode->header.type = cpu_to_le16(TLV_TYPE_BSS_MODE); + bss_mode->header.len = cpu_to_le16(sizeof(bss_mode->bss_mode)); + bss_mode->bss_mode = scan_cfg_out->bss_mode; + tlv_pos += sizeof(bss_mode->header) + + le16_to_cpu(bss_mode->header.len); + } + /* If the input config or adapter has the number of Probes set, add tlv */ if (num_probes) { @@ -1035,7 +1050,8 @@ mwifiex_config_scan(struct mwifiex_private *priv, if (scan_type == MWIFIEX_SCAN_TYPE_PASSIVE) (scan_chan_list + chan_idx)->chan_scan_mode_bitmap - |= MWIFIEX_PASSIVE_SCAN; + |= (MWIFIEX_PASSIVE_SCAN | + MWIFIEX_HIDDEN_SSID_REPORT); else (scan_chan_list + chan_idx)->chan_scan_mode_bitmap @@ -1586,6 +1602,62 @@ int mwifiex_check_network_compatibility(struct mwifiex_private *priv, return ret; } +/* This function checks if SSID string contains all zeroes or length is zero */ +static bool mwifiex_is_hidden_ssid(struct cfg80211_ssid *ssid) +{ + int idx; + + for (idx = 0; idx < ssid->ssid_len; idx++) { + if (ssid->ssid[idx]) + return false; + } + + return true; +} + +/* This function checks if any hidden SSID found in passive scan channels + * and save those channels for specific SSID active scan + */ +static int mwifiex_save_hidden_ssid_channels(struct mwifiex_private *priv, + struct cfg80211_bss *bss) +{ + struct mwifiex_bssdescriptor *bss_desc; + int ret; + int chid; + + /* Allocate and fill new bss descriptor */ + bss_desc = kzalloc(sizeof(*bss_desc), GFP_KERNEL); + if (!bss_desc) + return -ENOMEM; + + ret = mwifiex_fill_new_bss_desc(priv, bss, bss_desc); + if (ret) + goto done; + + if (mwifiex_is_hidden_ssid(&bss_desc->ssid)) { + mwifiex_dbg(priv->adapter, INFO, "found hidden SSID\n"); + for (chid = 0 ; chid < MWIFIEX_USER_SCAN_CHAN_MAX; chid++) { + if (priv->hidden_chan[chid].chan_number == + bss->channel->hw_value) + break; + + if (!priv->hidden_chan[chid].chan_number) { + priv->hidden_chan[chid].chan_number = + bss->channel->hw_value; + priv->hidden_chan[chid].radio_type = + bss->channel->band; + priv->hidden_chan[chid].scan_type = + MWIFIEX_SCAN_TYPE_ACTIVE; + break; + } + } + } + +done: + kfree(bss_desc); + return 0; +} + static int mwifiex_update_curr_bss_params(struct mwifiex_private *priv, struct cfg80211_bss *bss) { @@ -1775,6 +1847,14 @@ mwifiex_parse_single_response_buf(struct mwifiex_private *priv, u8 **bss_info, .mac_address, ETH_ALEN)) mwifiex_update_curr_bss_params(priv, bss); cfg80211_put_bss(priv->wdev.wiphy, bss); + + if ((chan->flags & IEEE80211_CHAN_RADAR) || + (chan->flags & IEEE80211_CHAN_NO_IR)) { + mwifiex_dbg(adapter, INFO, + "radar or passive channel %d\n", + channel); + mwifiex_save_hidden_ssid_channels(priv, bss); + } } } else { mwifiex_dbg(adapter, WARN, "missing BSS channel IE\n"); @@ -1798,6 +1878,57 @@ static void mwifiex_complete_scan(struct mwifiex_private *priv) } } +/* This function checks if any hidden SSID found in passive scan channels + * and do specific SSID active scan for those channels + */ +static int +mwifiex_active_scan_req_for_passive_chan(struct mwifiex_private *priv) +{ + int ret; + struct mwifiex_adapter *adapter = priv->adapter; + u8 id = 0; + struct mwifiex_user_scan_cfg *user_scan_cfg; + + if (adapter->active_scan_triggered || !priv->scan_request) { + adapter->active_scan_triggered = false; + return 0; + } + + if (!priv->hidden_chan[0].chan_number) { + mwifiex_dbg(adapter, INFO, "No BSS with hidden SSID found on DFS channels\n"); + return 0; + } + user_scan_cfg = kzalloc(sizeof(*user_scan_cfg), GFP_KERNEL); + + if (!user_scan_cfg) + return -ENOMEM; + + memset(user_scan_cfg, 0, sizeof(*user_scan_cfg)); + + for (id = 0; id < MWIFIEX_USER_SCAN_CHAN_MAX; id++) { + if (!priv->hidden_chan[id].chan_number) + break; + memcpy(&user_scan_cfg->chan_list[id], + &priv->hidden_chan[id], + sizeof(struct mwifiex_user_scan_chan)); + } + + adapter->active_scan_triggered = true; + user_scan_cfg->num_ssids = priv->scan_request->n_ssids; + user_scan_cfg->ssid_list = priv->scan_request->ssids; + + ret = mwifiex_scan_networks(priv, user_scan_cfg); + kfree(user_scan_cfg); + + memset(&priv->hidden_chan, 0, sizeof(priv->hidden_chan)); + + if (ret) { + dev_err(priv->adapter->dev, "scan failed: %d\n", ret); + return ret; + } + + return 0; +} static void mwifiex_check_next_scan_command(struct mwifiex_private *priv) { struct mwifiex_adapter *adapter = priv->adapter; @@ -1811,6 +1942,8 @@ static void mwifiex_check_next_scan_command(struct mwifiex_private *priv) adapter->scan_processing = false; spin_unlock_irqrestore(&adapter->mwifiex_cmd_lock, flags); + mwifiex_active_scan_req_for_passive_chan(priv); + if (!adapter->ext_scan) mwifiex_complete_scan(priv); @@ -1837,15 +1970,17 @@ static void mwifiex_check_next_scan_command(struct mwifiex_private *priv) adapter->scan_processing = false; spin_unlock_irqrestore(&adapter->mwifiex_cmd_lock, flags); - if (priv->scan_request) { - mwifiex_dbg(adapter, INFO, - "info: aborting scan\n"); - cfg80211_scan_done(priv->scan_request, 1); - priv->scan_request = NULL; - } else { - priv->scan_aborting = false; - mwifiex_dbg(adapter, INFO, - "info: scan already aborted\n"); + if (!adapter->active_scan_triggered) { + if (priv->scan_request) { + mwifiex_dbg(adapter, INFO, + "info: aborting scan\n"); + cfg80211_scan_done(priv->scan_request, 1); + priv->scan_request = NULL; + } else { + priv->scan_aborting = false; + mwifiex_dbg(adapter, INFO, + "info: scan already aborted\n"); + } } } else { /* Get scan command from scan_pending_q and put to -- cgit v1.2.3-54-g00ecf