[PATCH 3/3] staging: wilc1000: refactor p2p action frames handling API's
Ajay.Kathat at microchip.com
Ajay.Kathat at microchip.com
Mon Feb 10 18:36:01 UTC 2020
From: Ajay Singh <ajay.kathat at microchip.com>
Refactor handling of P2P specific action frames. Make use of 'struct' to
handle the P2P frames instead of manipulating using 'buf' pointer.
Signed-off-by: Ajay Singh <ajay.kathat at microchip.com>
---
drivers/staging/wilc1000/cfg80211.c | 298 ++++++++++++----------------
1 file changed, 127 insertions(+), 171 deletions(-)
diff --git a/drivers/staging/wilc1000/cfg80211.c b/drivers/staging/wilc1000/cfg80211.c
index 7afbc475b3ea..1430b95a06de 100644
--- a/drivers/staging/wilc1000/cfg80211.c
+++ b/drivers/staging/wilc1000/cfg80211.c
@@ -6,29 +6,17 @@
#include "cfg80211.h"
-#define FRAME_TYPE_ID 0
-#define ACTION_CAT_ID 24
-#define ACTION_SUBTYPE_ID 25
-#define P2P_PUB_ACTION_SUBTYPE 30
-
-#define ACTION_FRAME 0xd0
-#define GO_INTENT_ATTR_ID 0x04
-#define CHANLIST_ATTR_ID 0x0b
-#define OPERCHAN_ATTR_ID 0x11
-#define PUB_ACTION_ATTR_ID 0x04
-#define P2PELEM_ATTR_ID 0xdd
-
#define GO_NEG_REQ 0x00
#define GO_NEG_RSP 0x01
#define GO_NEG_CONF 0x02
#define P2P_INV_REQ 0x03
#define P2P_INV_RSP 0x04
-#define PUBLIC_ACT_VENDORSPEC 0x09
-#define GAS_INITIAL_REQ 0x0a
-#define GAS_INITIAL_RSP 0x0b
#define WILC_INVALID_CHANNEL 0
+/* Operation at 2.4 GHz with channels 1-13 */
+#define WILC_WLAN_OPERATING_CLASS_2_4GHZ 0x51
+
static const struct ieee80211_txrx_stypes
wilc_wfi_cfg80211_mgmt_types[NUM_NL80211_IFTYPES] = {
[NL80211_IFTYPE_STATION] = {
@@ -67,7 +55,50 @@ struct wilc_p2p_mgmt_data {
u8 *buff;
};
-static const u8 p2p_oui[] = {0x50, 0x6f, 0x9A, 0x09};
+struct wilc_p2p_pub_act_frame {
+ u8 category;
+ u8 action;
+ u8 oui[3];
+ u8 oui_type;
+ u8 oui_subtype;
+ u8 dialog_token;
+ u8 elem[0];
+} __packed;
+
+struct wilc_vendor_specific_ie {
+ u8 tag_number;
+ u8 tag_len;
+ u8 oui[3];
+ u8 oui_type;
+ u8 attr[0];
+} __packed;
+
+struct wilc_attr_entry {
+ u8 attr_type;
+ __le16 attr_len;
+ u8 val[0];
+} __packed;
+
+struct wilc_attr_oper_ch {
+ u8 attr_type;
+ __le16 attr_len;
+ u8 country_code[IEEE80211_COUNTRY_STRING_LEN];
+ u8 op_class;
+ u8 op_channel;
+} __packed;
+
+struct wilc_attr_ch_list {
+ u8 attr_type;
+ __le16 attr_len;
+ u8 country_code[IEEE80211_COUNTRY_STRING_LEN];
+ u8 elem[0];
+} __packed;
+
+struct wilc_ch_list_elem {
+ u8 op_class;
+ u8 no_of_channels;
+ u8 ch_list[0];
+} __packed;
static void cfg_scan_result(enum scan_event scan_event,
struct wilc_rcvd_net_info *info, void *user_void)
@@ -896,87 +927,51 @@ static int flush_pmksa(struct wiphy *wiphy, struct net_device *netdev)
return 0;
}
-static inline void wilc_wfi_cfg_parse_ch_attr(u8 *buf, u8 ch_list_attr_idx,
- u8 op_ch_attr_idx, u8 sta_ch)
-{
- int i = 0;
- int j = 0;
-
- if (ch_list_attr_idx) {
- u8 limit = ch_list_attr_idx + 3 + buf[ch_list_attr_idx + 1];
-
- for (i = ch_list_attr_idx + 3; i < limit; i++) {
- if (buf[i] == 0x51) {
- for (j = i + 2; j < ((i + 2) + buf[i + 1]); j++)
- buf[j] = sta_ch;
- break;
- }
- }
- }
-
- if (op_ch_attr_idx) {
- buf[op_ch_attr_idx + 6] = 0x51;
- buf[op_ch_attr_idx + 7] = sta_ch;
- }
-}
-
-static void wilc_wfi_cfg_parse_rx_action(u8 *buf, u32 len, u8 sta_ch)
+static inline void wilc_wfi_cfg_parse_ch_attr(u8 *buf, u32 len, u8 sta_ch)
{
+ struct wilc_attr_entry *e;
+ struct wilc_attr_ch_list *ch_list;
+ struct wilc_attr_oper_ch *op_ch;
u32 index = 0;
- u8 op_channel_attr_index = 0;
- u8 channel_list_attr_index = 0;
-
- while (index < len) {
- if (buf[index] == CHANLIST_ATTR_ID)
- channel_list_attr_index = index;
- else if (buf[index] == OPERCHAN_ATTR_ID)
- op_channel_attr_index = index;
- index += buf[index + 1] + 3;
- }
- if (sta_ch != WILC_INVALID_CHANNEL)
- wilc_wfi_cfg_parse_ch_attr(buf, channel_list_attr_index,
- op_channel_attr_index, sta_ch);
-}
+ u8 ch_list_idx = 0;
+ u8 op_ch_idx = 0;
-static void wilc_wfi_cfg_parse_tx_action(u8 *buf, u32 len, bool oper_ch,
- u8 iftype, u8 sta_ch)
-{
- u32 index = 0;
- u8 op_channel_attr_index = 0;
- u8 channel_list_attr_index = 0;
+ if (sta_ch == WILC_INVALID_CHANNEL)
+ return;
while (index < len) {
- if (buf[index] == CHANLIST_ATTR_ID)
- channel_list_attr_index = index;
- else if (buf[index] == OPERCHAN_ATTR_ID)
- op_channel_attr_index = index;
- index += buf[index + 1] + 3;
+ e = (struct wilc_attr_entry *)&buf[index];
+ if (e->attr_type == IEEE80211_P2P_ATTR_CHANNEL_LIST)
+ ch_list_idx = index;
+ else if (e->attr_type == IEEE80211_P2P_ATTR_OPER_CHANNEL)
+ op_ch_idx = index;
+ if (ch_list_idx && op_ch_idx)
+ break;
+ index += le16_to_cpu(e->attr_len) + sizeof(*e);
}
- if (sta_ch != WILC_INVALID_CHANNEL && oper_ch)
- wilc_wfi_cfg_parse_ch_attr(buf, channel_list_attr_index,
- op_channel_attr_index, sta_ch);
-}
-static void wilc_wfi_cfg_parse_rx_vendor_spec(struct wilc_priv *priv, u8 *buff,
- u32 size)
-{
- int i;
- u8 subtype;
- struct wilc_vif *vif = netdev_priv(priv->dev);
-
- subtype = buff[P2P_PUB_ACTION_SUBTYPE];
- if (subtype == GO_NEG_REQ || subtype == GO_NEG_RSP ||
- subtype == P2P_INV_REQ || subtype == P2P_INV_RSP) {
- for (i = P2P_PUB_ACTION_SUBTYPE + 2; i < size; i++) {
- if (buff[i] == P2PELEM_ATTR_ID &&
- !(memcmp(p2p_oui, &buff[i + 2], 4))) {
- wilc_wfi_cfg_parse_rx_action(&buff[i + 6],
- size - (i + 6),
- vif->wilc->sta_ch);
+ if (ch_list_idx) {
+ u16 attr_size;
+ struct wilc_ch_list_elem *e;
+ int i;
+
+ ch_list = (struct wilc_attr_ch_list *)&buf[ch_list_idx];
+ attr_size = le16_to_cpu(ch_list->attr_len);
+ for (i = 0; i < attr_size;) {
+ e = (struct wilc_ch_list_elem *)(ch_list->elem + i);
+ if (e->op_class == WILC_WLAN_OPERATING_CLASS_2_4GHZ) {
+ memset(e->ch_list, sta_ch, e->no_of_channels);
break;
}
+ i += e->no_of_channels;
}
}
+
+ if (op_ch_idx) {
+ op_ch = (struct wilc_attr_oper_ch *)&buf[op_ch_idx];
+ op_ch->op_class = WILC_WLAN_OPERATING_CLASS_2_4GHZ;
+ op_ch->op_channel = sta_ch;
+ }
}
void wilc_wfi_p2p_rx(struct wilc_vif *vif, u8 *buff, u32 size)
@@ -984,17 +979,22 @@ void wilc_wfi_p2p_rx(struct wilc_vif *vif, u8 *buff, u32 size)
struct wilc *wl = vif->wilc;
struct wilc_priv *priv = &vif->priv;
struct host_if_drv *wfi_drv = priv->hif_drv;
+ struct ieee80211_mgmt *mgmt;
+ struct wilc_vendor_specific_ie *p;
+ struct wilc_p2p_pub_act_frame *d;
+ int ie_offset = offsetof(struct ieee80211_mgmt, u) + sizeof(*d);
+ const u8 *vendor_ie;
u32 header, pkt_offset;
s32 freq;
- __le16 fc;
header = get_unaligned_le32(buff - HOST_HDR_OFFSET);
pkt_offset = GET_PKT_OFFSET(header);
if (pkt_offset & IS_MANAGMEMENT_CALLBACK) {
bool ack = false;
+ struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)buff;
- if (buff[FRAME_TYPE_ID] == IEEE80211_STYPE_PROBE_RESP ||
+ if (ieee80211_is_probe_resp(hdr->frame_control) ||
pkt_offset & IS_MGMT_STATUS_SUCCES)
ack = true;
@@ -1005,38 +1005,33 @@ void wilc_wfi_p2p_rx(struct wilc_vif *vif, u8 *buff, u32 size)
freq = ieee80211_channel_to_frequency(wl->op_ch, NL80211_BAND_2GHZ);
- fc = ((struct ieee80211_hdr *)buff)->frame_control;
- if (!ieee80211_is_action(fc)) {
- cfg80211_rx_mgmt(&priv->wdev, freq, 0, buff, size, 0);
- return;
- }
+ mgmt = (struct ieee80211_mgmt *)buff;
+ if (!ieee80211_is_action(mgmt->frame_control))
+ goto out_rx_mgmt;
if (priv->cfg_scanning &&
time_after_eq(jiffies, (unsigned long)wfi_drv->p2p_timeout)) {
netdev_dbg(vif->ndev, "Receiving action wrong ch\n");
return;
}
- if (buff[ACTION_CAT_ID] == PUB_ACTION_ATTR_ID) {
- switch (buff[ACTION_SUBTYPE_ID]) {
- case GAS_INITIAL_REQ:
- case GAS_INITIAL_RSP:
- break;
- case PUBLIC_ACT_VENDORSPEC:
- if (!memcmp(p2p_oui, &buff[ACTION_SUBTYPE_ID + 1], 4))
- wilc_wfi_cfg_parse_rx_vendor_spec(priv, buff,
- size);
+ if (!ieee80211_is_public_action((struct ieee80211_hdr *)buff, size))
+ goto out_rx_mgmt;
- break;
+ d = (struct wilc_p2p_pub_act_frame *)(&mgmt->u.action);
+ if (d->oui_subtype != GO_NEG_REQ && d->oui_subtype != GO_NEG_RSP &&
+ d->oui_subtype != P2P_INV_REQ && d->oui_subtype != P2P_INV_RSP)
+ goto out_rx_mgmt;
- default:
- netdev_dbg(vif->ndev,
- "%s: Not handled action frame type:%x\n",
- __func__, buff[ACTION_SUBTYPE_ID]);
- break;
- }
- }
+ vendor_ie = cfg80211_find_vendor_ie(WLAN_OUI_WFA, WLAN_OUI_TYPE_WFA_P2P,
+ buff + ie_offset, size - ie_offset);
+ if (!vendor_ie)
+ goto out_rx_mgmt;
+
+ p = (struct wilc_vendor_specific_ie *)vendor_ie;
+ wilc_wfi_cfg_parse_ch_attr(p->attr, p->tag_len - 4, vif->wilc->sta_ch);
+out_rx_mgmt:
cfg80211_rx_mgmt(&priv->wdev, freq, 0, buff, size, 0);
}
@@ -1116,39 +1111,6 @@ static int cancel_remain_on_channel(struct wiphy *wiphy,
return wilc_listen_state_expired(vif, cookie);
}
-static void wilc_wfi_cfg_tx_vendor_spec(struct wilc_priv *priv,
- struct wilc_p2p_mgmt_data *mgmt_tx,
- struct cfg80211_mgmt_tx_params *params,
- u8 iftype, u32 buf_len)
-{
- const u8 *buf = params->buf;
- size_t len = params->len;
- u32 i;
- u8 subtype = buf[P2P_PUB_ACTION_SUBTYPE];
- struct wilc_vif *vif = netdev_priv(priv->dev);
-
- if (subtype != GO_NEG_REQ && subtype != GO_NEG_RSP &&
- subtype != P2P_INV_REQ && subtype != P2P_INV_RSP)
- return;
-
- for (i = P2P_PUB_ACTION_SUBTYPE + 2; i < len; i++) {
- if (buf[i] == P2PELEM_ATTR_ID &&
- !memcmp(p2p_oui, &buf[i + 2], 4)) {
- bool oper_ch = false;
- u8 *tx_buff = &mgmt_tx->buff[i + 6];
-
- if (subtype == P2P_INV_REQ || subtype == P2P_INV_RSP)
- oper_ch = true;
-
- wilc_wfi_cfg_parse_tx_action(tx_buff, len - (i + 6),
- oper_ch, iftype,
- vif->wilc->sta_ch);
-
- break;
- }
- }
-}
-
static int mgmt_tx(struct wiphy *wiphy,
struct wireless_dev *wdev,
struct cfg80211_mgmt_tx_params *params,
@@ -1163,6 +1125,10 @@ static int mgmt_tx(struct wiphy *wiphy,
struct wilc_vif *vif = netdev_priv(wdev->netdev);
struct wilc_priv *priv = &vif->priv;
struct host_if_drv *wfi_drv = priv->hif_drv;
+ struct wilc_vendor_specific_ie *p;
+ struct wilc_p2p_pub_act_frame *d;
+ int ie_offset = offsetof(struct ieee80211_mgmt, u) + sizeof(*d);
+ const u8 *vendor_ie;
int ret = 0;
*cookie = prandom_u32();
@@ -1194,39 +1160,29 @@ static int mgmt_tx(struct wiphy *wiphy,
goto out_txq_add_pkt;
}
- if (!ieee80211_is_action(mgmt->frame_control))
- goto out_txq_add_pkt;
+ if (!ieee80211_is_public_action((struct ieee80211_hdr *)buf, len))
+ goto out_set_timeout;
- if (buf[ACTION_CAT_ID] == PUB_ACTION_ATTR_ID) {
- if (buf[ACTION_SUBTYPE_ID] != PUBLIC_ACT_VENDORSPEC ||
- buf[P2P_PUB_ACTION_SUBTYPE] != GO_NEG_CONF) {
- wilc_set_mac_chnl_num(vif, chan->hw_value);
- vif->wilc->op_ch = chan->hw_value;
- }
- switch (buf[ACTION_SUBTYPE_ID]) {
- case GAS_INITIAL_REQ:
- case GAS_INITIAL_RSP:
- break;
+ d = (struct wilc_p2p_pub_act_frame *)(&mgmt->u.action);
+ if (d->oui_type != WLAN_OUI_TYPE_WFA_P2P ||
+ d->oui_subtype != GO_NEG_CONF) {
+ wilc_set_mac_chnl_num(vif, chan->hw_value);
+ vif->wilc->op_ch = chan->hw_value;
+ }
- case PUBLIC_ACT_VENDORSPEC:
- if (!memcmp(p2p_oui, &buf[ACTION_SUBTYPE_ID + 1], 4))
- wilc_wfi_cfg_tx_vendor_spec(priv, mgmt_tx,
- params, vif->iftype,
- len);
- else
- netdev_dbg(vif->ndev,
- "Not a P2P public action frame\n");
+ if (d->oui_subtype != P2P_INV_REQ && d->oui_subtype != P2P_INV_RSP)
+ goto out_set_timeout;
- break;
+ vendor_ie = cfg80211_find_vendor_ie(WLAN_OUI_WFA, WLAN_OUI_TYPE_WFA_P2P,
+ mgmt_tx->buff + ie_offset,
+ len - ie_offset);
+ if (!vendor_ie)
+ goto out_set_timeout;
- default:
- netdev_dbg(vif->ndev,
- "%s: Not handled action frame type:%x\n",
- __func__, buf[ACTION_SUBTYPE_ID]);
- break;
- }
- }
+ p = (struct wilc_vendor_specific_ie *)vendor_ie;
+ wilc_wfi_cfg_parse_ch_attr(p->attr, p->tag_len - 4, vif->wilc->sta_ch);
+out_set_timeout:
wfi_drv->p2p_timeout = (jiffies + msecs_to_jiffies(wait));
out_txq_add_pkt:
--
2.24.0
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