From 48ed16e86b282309afa1b911271cb39fbcfb9f06 Mon Sep 17 00:00:00 2001 From: Hante Meuleman Date: Sat, 2 Jan 2016 09:41:38 +0100 Subject: [PATCH] brcmfmac: Add support for scheduled scan mac randomization Scheduled scan be requested to use mac randomization. This patch checks the flags and enables the randomization if desired. Reviewed-by: Arend Van Spriel Reviewed-by: Franky (Zhenhui) Lin Reviewed-by: Pieter-Paul Giesberts Signed-off-by: Hante Meuleman Signed-off-by: Arend van Spriel Signed-off-by: Kalle Valo --- .../broadcom/brcm80211/brcmfmac/cfg80211.c | 54 ++++++++++++++++--- .../broadcom/brcm80211/brcmfmac/feature.c | 10 ++++ .../broadcom/brcm80211/brcmfmac/feature.h | 4 +- .../broadcom/brcm80211/brcmfmac/fwil_types.h | 17 ++++++ 4 files changed, 77 insertions(+), 8 deletions(-) diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c index 6b9339b83abc..05843b783d7f 100644 --- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c +++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c @@ -3544,9 +3544,14 @@ static int brcmf_dev_pno_clean(struct net_device *ndev) return ret; } -static int brcmf_dev_pno_config(struct net_device *ndev) +static int brcmf_dev_pno_config(struct brcmf_if *ifp, + struct cfg80211_sched_scan_request *request) { struct brcmf_pno_param_le pfn_param; + struct brcmf_pno_macaddr_le pfn_mac; + s32 err; + u8 *mac_mask; + int i; memset(&pfn_param, 0, sizeof(pfn_param)); pfn_param.version = cpu_to_le32(BRCMF_PNO_VERSION); @@ -3559,8 +3564,37 @@ static int brcmf_dev_pno_config(struct net_device *ndev) /* set up pno scan fr */ pfn_param.scan_freq = cpu_to_le32(BRCMF_PNO_TIME); - return brcmf_fil_iovar_data_set(netdev_priv(ndev), "pfn_set", - &pfn_param, sizeof(pfn_param)); + err = brcmf_fil_iovar_data_set(ifp, "pfn_set", &pfn_param, + sizeof(pfn_param)); + if (err) { + brcmf_err("pfn_set failed, err=%d\n", err); + return err; + } + + /* Find out if mac randomization should be turned on */ + if (!(request->flags & NL80211_SCAN_FLAG_RANDOM_ADDR)) + return 0; + + pfn_mac.version = BRCMF_PFN_MACADDR_CFG_VER; + pfn_mac.flags = BRCMF_PFN_MAC_OUI_ONLY | BRCMF_PFN_SET_MAC_UNASSOC; + + memcpy(pfn_mac.mac, request->mac_addr, ETH_ALEN); + mac_mask = request->mac_addr_mask; + for (i = 0; i < ETH_ALEN; i++) { + pfn_mac.mac[i] &= mac_mask[i]; + pfn_mac.mac[i] |= get_random_int() & ~(mac_mask[i]); + } + /* Clear multi bit */ + pfn_mac.mac[0] &= 0xFE; + /* Set locally administered */ + pfn_mac.mac[0] |= 0x02; + + err = brcmf_fil_iovar_data_set(ifp, "pfn_macaddr", &pfn_mac, + sizeof(pfn_mac)); + if (err) + brcmf_err("pfn_macaddr failed, err=%d\n", err); + + return err; } static int @@ -3614,11 +3648,8 @@ brcmf_cfg80211_sched_scan_start(struct wiphy *wiphy, } /* configure pno */ - ret = brcmf_dev_pno_config(ndev); - if (ret < 0) { - brcmf_err("PNO setup failed!! ret=%d\n", ret); + if (brcmf_dev_pno_config(ifp, request)) return -EINVAL; - } /* configure each match set */ for (i = 0; i < request->n_match_sets; i++) { @@ -6455,6 +6486,15 @@ struct brcmf_cfg80211_info *brcmf_cfg80211_attach(struct brcmf_pub *drvr, goto wiphy_unreg_out; } + /* Fill in some of the advertised nl80211 supported features */ + if (brcmf_feat_is_enabled(ifp, BRCMF_FEAT_SCAN_RANDOM_MAC)) { + wiphy->features |= NL80211_FEATURE_SCHED_SCAN_RANDOM_MAC_ADDR; +#ifdef CONFIG_PM + if (wiphy->wowlan->flags & WIPHY_WOWLAN_NET_DETECT) + wiphy->features |= NL80211_FEATURE_ND_RANDOM_MAC_ADDR; +#endif + } + return cfg; wiphy_unreg_out: diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/feature.c b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/feature.c index d9d1ca4b93ec..e7ac8a294bb7 100644 --- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/feature.c +++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/feature.c @@ -18,10 +18,12 @@ #include #include +#include #include "core.h" #include "bus.h" #include "debug.h" #include "fwil.h" +#include "fwil_types.h" #include "feature.h" @@ -129,6 +131,8 @@ static void brcmf_feat_iovar_int_set(struct brcmf_if *ifp, void brcmf_feat_attach(struct brcmf_pub *drvr) { struct brcmf_if *ifp = brcmf_get_ifp(drvr, 0); + struct brcmf_pno_macaddr_le pfn_mac; + s32 err; brcmf_feat_iovar_int_get(ifp, BRCMF_FEAT_MCHAN, "mchan"); brcmf_feat_iovar_int_get(ifp, BRCMF_FEAT_PNO, "pfn"); @@ -140,6 +144,12 @@ void brcmf_feat_attach(struct brcmf_pub *drvr) brcmf_feat_iovar_int_get(ifp, BRCMF_FEAT_RSDB, "rsdb_mode"); brcmf_feat_iovar_int_get(ifp, BRCMF_FEAT_TDLS, "tdls_enable"); + pfn_mac.version = BRCMF_PFN_MACADDR_CFG_VER; + err = brcmf_fil_iovar_data_get(ifp, "pfn_macaddr", &pfn_mac, + sizeof(pfn_mac)); + if (!err) + ifp->drvr->feat_flags |= BIT(BRCMF_FEAT_SCAN_RANDOM_MAC); + if (brcmf_feature_disable) { brcmf_dbg(INFO, "Features: 0x%02x, disable: 0x%02x\n", ifp->drvr->feat_flags, brcmf_feature_disable); diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/feature.h b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/feature.h index 13906568bc2d..2e2479d41337 100644 --- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/feature.h +++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/feature.h @@ -26,6 +26,7 @@ * P2P: peer-to-peer * RSDB: Real Simultaneous Dual Band * TDLS: Tunneled Direct Link Setup + * SCAN_RANDOM_MAC: Random MAC during (net detect) scheduled scan. */ #define BRCMF_FEAT_LIST \ BRCMF_FEAT_DEF(MBSS) \ @@ -34,7 +35,8 @@ BRCMF_FEAT_DEF(WOWL) \ BRCMF_FEAT_DEF(P2P) \ BRCMF_FEAT_DEF(RSDB) \ - BRCMF_FEAT_DEF(TDLS) + BRCMF_FEAT_DEF(TDLS) \ + BRCMF_FEAT_DEF(SCAN_RANDOM_MAC) /* * Quirks: diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/fwil_types.h b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/fwil_types.h index 0b1e46d67e84..bf2df49d7098 100644 --- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/fwil_types.h +++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/fwil_types.h @@ -128,6 +128,10 @@ #define BRCMF_MAXPMKID 16 /* max # PMKID cache entries */ +#define BRCMF_PFN_MACADDR_CFG_VER 1 +#define BRCMF_PFN_MAC_OUI_ONLY BIT(0) +#define BRCMF_PFN_SET_MAC_UNASSOC BIT(1) + /* join preference types for join_pref iovar */ enum brcmf_join_pref_types { BRCMF_JOIN_PREF_RSSI = 1, @@ -751,6 +755,19 @@ struct brcmf_pno_scanresults_le { __le32 count; }; +/** + * struct brcmf_pno_macaddr_le - to configure PNO macaddr randomization. + * + * @version: PNO version identifier. + * @flags: Flags defining how mac addrss should be used. + * @mac: MAC address. + */ +struct brcmf_pno_macaddr_le { + u8 version; + u8 flags; + u8 mac[ETH_ALEN]; +}; + /** * struct brcmf_pktcnt_le - packet counters. * -- 2.30.2