From a43c49a817f31ce1accc029239827b108319ecf9 Mon Sep 17 00:00:00 2001 From: Lennert Buytenhek Date: Thu, 22 Oct 2009 20:20:32 +0200 Subject: [PATCH] mwl8k: add support for enabling hardware sniffer mode Signed-off-by: Lennert Buytenhek Signed-off-by: John W. Linville --- drivers/net/wireless/mwl8k.c | 66 ++++++++++++++++++++++++++++++++++-- 1 file changed, 63 insertions(+), 3 deletions(-) diff --git a/drivers/net/wireless/mwl8k.c b/drivers/net/wireless/mwl8k.c index 75c9261abad8..94cbf93a8bf5 100644 --- a/drivers/net/wireless/mwl8k.c +++ b/drivers/net/wireless/mwl8k.c @@ -173,6 +173,7 @@ struct mwl8k_priv { bool radio_on; bool radio_short_preamble; + bool sniffer_enabled; bool wmm_enabled; /* XXX need to convert this to handle multiple interfaces */ @@ -2560,6 +2561,18 @@ static int mwl8k_add_interface(struct ieee80211_hw *hw, if (conf->type != NL80211_IFTYPE_STATION) return -EINVAL; + /* + * Reject interface creation if sniffer mode is active, as + * STA operation is mutually exclusive with hardware sniffer + * mode. + */ + if (priv->sniffer_enabled) { + printk(KERN_INFO "%s: unable to create STA " + "interface due to sniffer mode being enabled\n", + wiphy_name(hw->wiphy)); + return -EINVAL; + } + /* Clean out driver private area */ mwl8k_vif = MWL8K_VIF(conf->vif); memset(mwl8k_vif, 0, sizeof(*mwl8k_vif)); @@ -2730,13 +2743,56 @@ static u64 mwl8k_prepare_multicast(struct ieee80211_hw *hw, return (unsigned long)cmd; } +static int +mwl8k_configure_filter_sniffer(struct ieee80211_hw *hw, + unsigned int changed_flags, + unsigned int *total_flags) +{ + struct mwl8k_priv *priv = hw->priv; + + /* + * Hardware sniffer mode is mutually exclusive with STA + * operation, so refuse to enable sniffer mode if a STA + * interface is active. + */ + if (priv->vif != NULL) { + if (net_ratelimit()) + printk(KERN_INFO "%s: not enabling sniffer " + "mode because STA interface is active\n", + wiphy_name(hw->wiphy)); + return 0; + } + + if (!priv->sniffer_enabled) { + if (mwl8k_enable_sniffer(hw, 1)) + return 0; + priv->sniffer_enabled = true; + } + + *total_flags &= FIF_PROMISC_IN_BSS | FIF_ALLMULTI | + FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL | + FIF_OTHER_BSS; + + return 1; +} + static void mwl8k_configure_filter(struct ieee80211_hw *hw, unsigned int changed_flags, unsigned int *total_flags, u64 multicast) { struct mwl8k_priv *priv = hw->priv; - struct mwl8k_cmd_pkt *cmd; + struct mwl8k_cmd_pkt *cmd = (void *)(unsigned long)multicast; + + /* + * Enable hardware sniffer mode if FIF_CONTROL or + * FIF_OTHER_BSS is requested. + */ + if (*total_flags & (FIF_CONTROL | FIF_OTHER_BSS) && + mwl8k_configure_filter_sniffer(hw, changed_flags, total_flags)) { + kfree(cmd); + return; + } /* Clear unsupported feature flags */ *total_flags &= FIF_ALLMULTI | FIF_BCN_PRBRESP_PROMISC; @@ -2744,6 +2800,11 @@ static void mwl8k_configure_filter(struct ieee80211_hw *hw, if (mwl8k_fw_lock(hw)) return; + if (priv->sniffer_enabled) { + mwl8k_enable_sniffer(hw, 0); + priv->sniffer_enabled = false; + } + if (changed_flags & FIF_BCN_PRBRESP_PROMISC) { if (*total_flags & FIF_BCN_PRBRESP_PROMISC) { /* @@ -2769,8 +2830,6 @@ static void mwl8k_configure_filter(struct ieee80211_hw *hw, } } - cmd = (void *)(unsigned long)multicast; - /* * If FIF_ALLMULTI is being requested, throw away the command * packet that ->prepare_multicast() built and replace it with @@ -2929,6 +2988,7 @@ static int __devinit mwl8k_probe(struct pci_dev *pdev, priv = hw->priv; priv->hw = hw; priv->pdev = pdev; + priv->sniffer_enabled = false; priv->wmm_enabled = false; priv->pending_tx_pkts = 0; -- 2.39.5