From 4fb8b5aa2a1126783ae00bae544d6f3c519408ef Mon Sep 17 00:00:00 2001 From: Ajay Singh Date: Wed, 12 Feb 2020 10:14:15 +0000 Subject: [PATCH] staging: wilc1000: refactor p2p action frames handling API's MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit 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 Link: https://lore.kernel.org/r/20200212154503.8835-1-ajay.kathat@microchip.com Signed-off-by: Greg Kroah-Hartman --- drivers/staging/wilc1000/cfg80211.c | 300 ++++++++++++---------------- 1 file changed, 128 insertions(+), 172 deletions(-) diff --git a/drivers/staging/wilc1000/cfg80211.c b/drivers/staging/wilc1000/cfg80211.c index 7afbc475b3ea..d9c7bed2e6fb 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) +static inline void wilc_wfi_cfg_parse_ch_attr(u8 *buf, u32 len, 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]; + 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; - 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 (sta_ch == WILC_INVALID_CHANNEL) + return; - if (op_ch_attr_idx) { - buf[op_ch_attr_idx + 6] = 0x51; - buf[op_ch_attr_idx + 7] = 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); } -} -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); -} + if (ch_list_idx) { + u16 attr_size; + struct wilc_ch_list_elem *e; + int i; -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); + 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: -- 2.30.2