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staging: wilc1000: refactor p2p action frames handling API's 

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@microchip.com>
Link: https://lore.kernel.org/r/20200212154503.8835-1-ajay.kathat@microchip.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Ajay Singh 2020-02-12 10:14:15 +00:00 committed by Greg Kroah-Hartman
parent a2203cfe0d
commit 4fb8b5aa2a
1 changed files with 131 additions and 175 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

306
drivers/staging/wilc1000/cfg80211.c
View File

@ -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)
@ -896,86 +927,50 @@ 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)
static inline void wilc_wfi_cfg_parse_ch_attr(u8 *buf, u32 len, u8 sta_ch)
{
int i = 0;
int j = 0;
struct wilc_attr_entry *e;
struct wilc_attr_ch_list *ch_list;
struct wilc_attr_oper_ch *op_ch;
u32 index = 0;
u8 ch_list_idx = 0;
u8 op_ch_idx = 0;
if (ch_list_attr_idx) {
u8 limit = ch_list_attr_idx + 3 + buf[ch_list_attr_idx + 1];
if (sta_ch == WILC_INVALID_CHANNEL)
return;
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;
while (index + sizeof(*e) <= len) {
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 (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_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)
{
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);
}
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;
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 && 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);
break;
}
}
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;
}
}
@ -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;
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");
break;
default:
netdev_dbg(vif->ndev,
"%s: Not handled action frame type:%x\n",
__func__, buf[ACTION_SUBTYPE_ID]);
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;
}
if (d->oui_subtype != P2P_INV_REQ && d->oui_subtype != P2P_INV_RSP)
goto out_set_timeout;
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;
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: