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brcmfmac: support 4-way handshake offloading for WPA/WPA2-PSK

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The firmware may have supplicant code built-in. This is detected
by the driver and indicated in the wiphy features flags. User-space
can use this flag to determine whether or not to provide the
pre-shared key material in the nl80211 CONNECT command.

Reviewed-by: Gautam (Gautam Kumar) Shukla <gautams@broadcom.com>
Reviewed-by: Hante Meuleman <meuleman@broadcom.com>
Reviewed-by: Pieter-Paul Giesberts <pieterpg@broadcom.com>
Signed-off-by: Arend van Spriel <arend.vanspriel@broadcom.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
This commit is contained in:
Arend van Spriel 2017-06-09 13:08:47 +01:00 committed by Kalle Valo
parent fdcbe65d61
commit b8a64f0e96
7 changed files with 134 additions and 7 deletions
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75
drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c
View file

@ -1357,6 +1357,27 @@ static u16 brcmf_map_fw_linkdown_reason(const struct brcmf_event_msg *e)
return reason;
}
static int brcmf_set_pmk(struct brcmf_if *ifp, const u8 *pmk_data, u16 pmk_len)
{
struct brcmf_wsec_pmk_le pmk;
int i, err;
/* convert to firmware key format */
pmk.key_len = cpu_to_le16(pmk_len << 1);
pmk.flags = cpu_to_le16(BRCMF_WSEC_PASSPHRASE);
for (i = 0; i < pmk_len; i++)
snprintf(&pmk.key[2 * i], 3, "%02x", pmk_data[i]);
/* store psk in firmware */
err = brcmf_fil_cmd_data_set(ifp, BRCMF_C_SET_WSEC_PMK,
&pmk, sizeof(pmk));
if (err < 0)
brcmf_err("failed to change PSK in firmware (len=%u)\n",
pmk_len);
return err;
}
static void brcmf_link_down(struct brcmf_cfg80211_vif *vif, u16 reason)
{
struct brcmf_cfg80211_info *cfg = wiphy_to_cfg(vif->wdev.wiphy);
@ -1379,6 +1400,10 @@ static void brcmf_link_down(struct brcmf_cfg80211_vif *vif, u16 reason)
clear_bit(BRCMF_VIF_STATUS_CONNECTING, &vif->sme_state);
clear_bit(BRCMF_SCAN_STATUS_SUPPRESS, &cfg->scan_status);
brcmf_btcoex_set_mode(vif, BRCMF_BTCOEX_ENABLED, 0);
if (vif->profile.use_fwsup != BRCMF_PROFILE_FWSUP_NONE) {
brcmf_set_pmk(vif->ifp, NULL, 0);
vif->profile.use_fwsup = BRCMF_PROFILE_FWSUP_NONE;
}
brcmf_dbg(TRACE, "Exit\n");
}
@ -2012,6 +2037,23 @@ brcmf_cfg80211_connect(struct wiphy *wiphy, struct net_device *ndev,
goto done;
}
if (sme->crypto.psk) {
brcmf_dbg(INFO, "using PSK offload\n");
/* enable firmware supplicant for this interface */
err = brcmf_fil_iovar_int_set(ifp, "sup_wpa", 1);
if (err < 0) {
brcmf_err("failed to enable fw supplicant\n");
goto done;
}
ifp->vif->profile.use_fwsup = BRCMF_PROFILE_FWSUP_PSK;
err = brcmf_set_pmk(ifp, sme->crypto.psk,
BRCMF_WSEC_MAX_PSK_LEN);
if (err)
goto done;
}
/* Join with specific BSSID and cached SSID
* If SSID is zero join based on BSSID only
*/
@ -5247,16 +5289,30 @@ void brcmf_cfg80211_free_netdev(struct net_device *ndev)
brcmf_free_vif(vif);
}
static bool brcmf_is_linkup(const struct brcmf_event_msg *e)
static bool brcmf_is_linkup(struct brcmf_cfg80211_vif *vif,
const struct brcmf_event_msg *e)
{
u32 event = e->event_code;
u32 status = e->status;
if (event == BRCMF_E_PSK_SUP &&
status == BRCMF_E_STATUS_FWSUP_COMPLETED)
set_bit(BRCMF_VIF_STATUS_EAP_SUCCESS, &vif->sme_state);
if (event == BRCMF_E_SET_SSID && status == BRCMF_E_STATUS_SUCCESS) {
brcmf_dbg(CONN, "Processing set ssid\n");
return true;
memcpy(vif->profile.bssid, e->addr, ETH_ALEN);
if (vif->profile.use_fwsup != BRCMF_PROFILE_FWSUP_PSK)
return true;
set_bit(BRCMF_VIF_STATUS_ASSOC_SUCCESS, &vif->sme_state);
}
if (test_bit(BRCMF_VIF_STATUS_EAP_SUCCESS, &vif->sme_state) &&
test_bit(BRCMF_VIF_STATUS_ASSOC_SUCCESS, &vif->sme_state)) {
clear_bit(BRCMF_VIF_STATUS_EAP_SUCCESS, &vif->sme_state);
clear_bit(BRCMF_VIF_STATUS_ASSOC_SUCCESS, &vif->sme_state);
return true;
}
return false;
}
@ -5291,6 +5347,13 @@ static bool brcmf_is_nonetwork(struct brcmf_cfg80211_info *cfg,
return true;
}
if (event == BRCMF_E_PSK_SUP &&
status != BRCMF_E_STATUS_FWSUP_COMPLETED) {
brcmf_dbg(CONN, "Processing failed supplicant state: %u\n",
status);
return true;
}
return false;
}
@ -5448,7 +5511,6 @@ brcmf_bss_connect_done(struct brcmf_cfg80211_info *cfg,
&ifp->vif->sme_state)) {
if (completed) {
brcmf_get_assoc_ies(cfg, ifp);
memcpy(profile->bssid, e->addr, ETH_ALEN);
brcmf_update_bss_info(cfg, ifp);
set_bit(BRCMF_VIF_STATUS_CONNECTED,
&ifp->vif->sme_state);
@ -5527,7 +5589,7 @@ brcmf_notify_connect_status(struct brcmf_if *ifp,
if (brcmf_is_apmode(ifp->vif)) {
err = brcmf_notify_connect_status_ap(cfg, ndev, e, data);
} else if (brcmf_is_linkup(e)) {
} else if (brcmf_is_linkup(ifp->vif, e)) {
brcmf_dbg(CONN, "Linkup\n");
if (brcmf_is_ibssmode(ifp->vif)) {
brcmf_inform_ibss(cfg, ndev, e->addr);
@ -5695,6 +5757,8 @@ static void brcmf_register_event_handlers(struct brcmf_cfg80211_info *cfg)
brcmf_p2p_notify_action_tx_complete);
brcmf_fweh_register(cfg->pub, BRCMF_E_ACTION_FRAME_OFF_CHAN_COMPLETE,
brcmf_p2p_notify_action_tx_complete);
brcmf_fweh_register(cfg->pub, BRCMF_E_PSK_SUP,
brcmf_notify_connect_status);
}
static void brcmf_deinit_priv_mem(struct brcmf_cfg80211_info *cfg)
@ -6491,6 +6555,9 @@ static int brcmf_setup_wiphy(struct wiphy *wiphy, struct brcmf_if *ifp)
wiphy->flags |= WIPHY_FLAG_SUPPORTS_TDLS;
if (!ifp->drvr->settings->roamoff)
wiphy->flags |= WIPHY_FLAG_SUPPORTS_FW_ROAM;
if (brcmf_feat_is_enabled(ifp, BRCMF_FEAT_FWSUP))
wiphy_ext_feature_set(wiphy,
NL80211_EXT_FEATURE_4WAY_HANDSHAKE_STA_PSK);
wiphy->mgmt_stypes = brcmf_txrx_stypes;
wiphy->max_remain_on_channel_duration = 5000;
if (brcmf_feat_is_enabled(ifp, BRCMF_FEAT_PNO)) {

14
drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.h
View file

@ -115,6 +115,11 @@ struct brcmf_cfg80211_security {
u32 cipher_group;
};
enum brcmf_profile_fwsup {
BRCMF_PROFILE_FWSUP_NONE,
BRCMF_PROFILE_FWSUP_PSK
};
/**
* struct brcmf_cfg80211_profile - profile information.
*
@ -126,6 +131,7 @@ struct brcmf_cfg80211_profile {
u8 bssid[ETH_ALEN];
struct brcmf_cfg80211_security sec;
struct brcmf_wsec_key key[BRCMF_MAX_DEFAULT_KEYS];
enum brcmf_profile_fwsup use_fwsup;
};
/**
@ -133,16 +139,20 @@ struct brcmf_cfg80211_profile {
*
* @BRCMF_VIF_STATUS_READY: ready for operation.
* @BRCMF_VIF_STATUS_CONNECTING: connect/join in progress.
* @BRCMF_VIF_STATUS_CONNECTED: connected/joined succesfully.
* @BRCMF_VIF_STATUS_CONNECTED: connected/joined successfully.
* @BRCMF_VIF_STATUS_DISCONNECTING: disconnect/disable in progress.
* @BRCMF_VIF_STATUS_AP_CREATED: AP operation started.
* @BRCMF_VIF_STATUS_EAP_SUCCUSS: EAPOL handshake successful.
* @BRCMF_VIF_STATUS_ASSOC_SUCCESS: successful SET_SSID received.
*/
enum brcmf_vif_status {
BRCMF_VIF_STATUS_READY,
BRCMF_VIF_STATUS_CONNECTING,
BRCMF_VIF_STATUS_CONNECTED,
BRCMF_VIF_STATUS_DISCONNECTING,
BRCMF_VIF_STATUS_AP_CREATED
BRCMF_VIF_STATUS_AP_CREATED,
BRCMF_VIF_STATUS_EAP_SUCCESS,
BRCMF_VIF_STATUS_ASSOC_SUCCESS,
};
/**

1
drivers/net/wireless/broadcom/brcm80211/brcmfmac/feature.c
View file

@ -195,6 +195,7 @@ void brcmf_feat_attach(struct brcmf_pub *drvr)
drvr->settings->feature_disable);
ifp->drvr->feat_flags &= ~drvr->settings->feature_disable;
}
brcmf_feat_iovar_int_get(ifp, BRCMF_FEAT_FWSUP, "sup_wpa");
/* set chip related quirks */
switch (drvr->bus_if->chip) {

4
drivers/net/wireless/broadcom/brcm80211/brcmfmac/feature.h
View file

@ -32,6 +32,7 @@
* WOWL_ARP_ND: ARP and Neighbor Discovery offload support during WOWL.
* MFP: 802.11w Management Frame Protection.
* GSCAN: enhanced scan offload feature.
* FWSUP: Firmware supplicant.
*/
#define BRCMF_FEAT_LIST \
BRCMF_FEAT_DEF(MBSS) \
@ -46,7 +47,8 @@
BRCMF_FEAT_DEF(WOWL_GTK) \
BRCMF_FEAT_DEF(WOWL_ARP_ND) \
BRCMF_FEAT_DEF(MFP) \
BRCMF_FEAT_DEF(GSCAN)
BRCMF_FEAT_DEF(GSCAN) \
BRCMF_FEAT_DEF(FWSUP)
/*
* Quirks:

30
drivers/net/wireless/broadcom/brcm80211/brcmfmac/fweh.h
View file

@ -142,6 +142,16 @@ enum brcmf_fweh_event_code {
#define BRCMF_E_STATUS_CS_ABORT 15
#define BRCMF_E_STATUS_ERROR 16
/* status field values for PSK_SUP event */
#define BRCMF_E_STATUS_FWSUP_WAIT_M1 4
#define BRCMF_E_STATUS_FWSUP_PREP_M2 5
#define BRCMF_E_STATUS_FWSUP_COMPLETED 6
#define BRCMF_E_STATUS_FWSUP_TIMEOUT 7
#define BRCMF_E_STATUS_FWSUP_WAIT_M3 8
#define BRCMF_E_STATUS_FWSUP_PREP_M4 9
#define BRCMF_E_STATUS_FWSUP_WAIT_G1 10
#define BRCMF_E_STATUS_FWSUP_PREP_G2 11
/* reason field values in struct brcmf_event_msg */
#define BRCMF_E_REASON_INITIAL_ASSOC 0
#define BRCMF_E_REASON_LOW_RSSI 1
@ -161,6 +171,26 @@ enum brcmf_fweh_event_code {
#define BRCMF_E_REASON_TDLS_PEER_CONNECTED 1
#define BRCMF_E_REASON_TDLS_PEER_DISCONNECTED 2
/* reason field values for PSK_SUP event */
#define BRCMF_E_REASON_FWSUP_OTHER 0
#define BRCMF_E_REASON_FWSUP_DECRYPT_KEY_DATA 1
#define BRCMF_E_REASON_FWSUP_BAD_UCAST_WEP128 2
#define BRCMF_E_REASON_FWSUP_BAD_UCAST_WEP40 3
#define BRCMF_E_REASON_FWSUP_UNSUP_KEY_LEN 4
#define BRCMF_E_REASON_FWSUP_PW_KEY_CIPHER 5
#define BRCMF_E_REASON_FWSUP_MSG3_TOO_MANY_IE 6
#define BRCMF_E_REASON_FWSUP_MSG3_IE_MISMATCH 7
#define BRCMF_E_REASON_FWSUP_NO_INSTALL_FLAG 8
#define BRCMF_E_REASON_FWSUP_MSG3_NO_GTK 9
#define BRCMF_E_REASON_FWSUP_GRP_KEY_CIPHER 10
#define BRCMF_E_REASON_FWSUP_GRP_MSG1_NO_GTK 11
#define BRCMF_E_REASON_FWSUP_GTK_DECRYPT_FAIL 12
#define BRCMF_E_REASON_FWSUP_SEND_FAIL 13
#define BRCMF_E_REASON_FWSUP_DEAUTH 14
#define BRCMF_E_REASON_FWSUP_WPA_PSK_TMO 15
#define BRCMF_E_REASON_FWSUP_WPA_PSK_M1_TMO 16
#define BRCMF_E_REASON_FWSUP_WPA_PSK_M3_TMO 17
/* action field values for brcmf_ifevent */
#define BRCMF_E_IF_ADD 1
#define BRCMF_E_IF_DEL 2

1
drivers/net/wireless/broadcom/brcm80211/brcmfmac/fwil.h
View file

@ -85,6 +85,7 @@
#define BRCMF_C_SET_SCAN_PASSIVE_TIME 258
#define BRCMF_C_GET_VAR 262
#define BRCMF_C_SET_VAR 263
#define BRCMF_C_SET_WSEC_PMK 268
s32 brcmf_fil_cmd_data_set(struct brcmf_if *ifp, u32 cmd, void *data, u32 len);
s32 brcmf_fil_cmd_data_get(struct brcmf_if *ifp, u32 cmd, void *data, u32 len);

16
drivers/net/wireless/broadcom/brcm80211/brcmfmac/fwil_types.h
View file

@ -45,6 +45,9 @@
#define BRCMF_SCAN_PARAMS_COUNT_MASK 0x0000ffff
#define BRCMF_SCAN_PARAMS_NSSID_SHIFT 16
#define BRCMF_WSEC_MAX_PSK_LEN 32
#define BRCMF_WSEC_PASSPHRASE BIT(0)
/* primary (ie tx) key */
#define BRCMF_PRIMARY_KEY (1 << 1)
#define DOT11_BSSTYPE_ANY 2
@ -470,6 +473,19 @@ struct brcmf_wsec_key_le {
u8 ea[ETH_ALEN]; /* per station */
};
/**
* struct brcmf_wsec_pmk_le - firmware pmk material.
*
* @key_len: number of octets in key material.
* @flags: key handling qualifiers.
* @key: PMK key material.
*/
struct brcmf_wsec_pmk_le {
__le16 key_len;
__le16 flags;
u8 key[2 * BRCMF_WSEC_MAX_PSK_LEN + 1];
};
/* Used to get specific STA parameters */
struct brcmf_scb_val_le {
__le32 val;