by Bing Zhao

[permalink] [raw]

Subject: [PATCH v2 18/30] mwifiex: parse TDLS action frames during RX

From: Avinash Patil <[email protected]>

This patch adds support for parsing TDLS action frames during
station receive handler.
Peer station capabilities are stored into station node.

Signed-off-by: Avinash Patil <[email protected]>
Signed-off-by: Bing Zhao <[email protected]>
---
drivers/net/wireless/mwifiex/decl.h | 8 +++
drivers/net/wireless/mwifiex/main.h | 19 +++++-
drivers/net/wireless/mwifiex/sta_rx.c | 13 +++-
drivers/net/wireless/mwifiex/tdls.c | 119 ++++++++++++++++++++++++++++++++++
drivers/net/wireless/mwifiex/wmm.c | 5 +-
drivers/net/wireless/mwifiex/wmm.h | 3 +
6 files changed, 160 insertions(+), 7 deletions(-)

diff --git a/drivers/net/wireless/mwifiex/decl.h b/drivers/net/wireless/mwifiex/decl.h
index c709f1c..efcd1b8 100644
--- a/drivers/net/wireless/mwifiex/decl.h
+++ b/drivers/net/wireless/mwifiex/decl.h
@@ -93,6 +93,14 @@ enum mwifiex_bss_role {
MWIFIEX_BSS_ROLE_ANY = 0xff,
};

+enum mwifiex_tdls_status {
+ TDLS_NOT_SETUP = 0,
+ TDLS_SETUP_INPROGRESS,
+ TDLS_SETUP_COMPLETE,
+ TDLS_SETUP_FAILURE,
+ TDLS_LINK_TEARDOWN,
+};
+
#define BSS_ROLE_BIT_MASK BIT(0)

#define GET_BSS_ROLE(priv) ((priv)->bss_role & BSS_ROLE_BIT_MASK)
diff --git a/drivers/net/wireless/mwifiex/main.h b/drivers/net/wireless/mwifiex/main.h
index c5368f2..fd0f3b5 100644
--- a/drivers/net/wireless/mwifiex/main.h
+++ b/drivers/net/wireless/mwifiex/main.h
@@ -594,8 +594,20 @@ struct mwifiex_bss_priv {
u64 fw_tsf;
};

-/* This is AP specific structure which stores information
- * about associated STA
+struct mwifiex_tdls_capab {
+ __le16 capab;
+ u8 rates[32];
+ u8 rates_len;
+ u8 qos_info;
+ u8 coex_2040;
+ struct ieee80211_ht_cap ht_capb;
+ struct ieee80211_ht_operation ht_oper;
+ struct ieee_types_extcap extcap;
+ struct ieee_types_generic rsn_ie;
+};
+
+/* This is AP/TDLS specific structure which stores information
+ * about associated/peer STA
*/
struct mwifiex_sta_node {
struct list_head list;
@@ -605,6 +617,7 @@ struct mwifiex_sta_node {
u8 ampdu_sta[MAX_NUM_TID];
u16 rx_seq[MAX_NUM_TID];
u16 max_amsdu;
+ struct mwifiex_tdls_capab tdls_cap;
};

struct mwifiex_if_ops {
@@ -1194,6 +1207,8 @@ int mwifiex_send_tdls_action_frame(struct mwifiex_private *priv,
u8 *peer, u8 action_code, u8 dialog_token,
u16 status_code, const u8 *extra_ies,
size_t extra_ies_len);
+void mwifiex_process_tdls_action_frame(struct mwifiex_private *priv,
+ u8 *buf, int len);

#ifdef CONFIG_DEBUG_FS
void mwifiex_debugfs_init(void);
diff --git a/drivers/net/wireless/mwifiex/sta_rx.c b/drivers/net/wireless/mwifiex/sta_rx.c
index 4651d67..b6aa958 100644
--- a/drivers/net/wireless/mwifiex/sta_rx.c
+++ b/drivers/net/wireless/mwifiex/sta_rx.c
@@ -88,11 +88,14 @@ int mwifiex_process_rx_packet(struct mwifiex_private *priv,
struct rxpd *local_rx_pd;
int hdr_chop;
struct ethhdr *eth;
+ u16 rx_pkt_off, rx_pkt_len;
+ u8 *offset;

local_rx_pd = (struct rxpd *) (skb->data);

- rx_pkt_hdr = (void *)local_rx_pd +
- le16_to_cpu(local_rx_pd->rx_pkt_offset);
+ rx_pkt_off = le16_to_cpu(local_rx_pd->rx_pkt_offset);
+ rx_pkt_len = le16_to_cpu(local_rx_pd->rx_pkt_length);
+ rx_pkt_hdr = (void *)local_rx_pd + rx_pkt_off;

if ((!memcmp(&rx_pkt_hdr->rfc1042_hdr, bridge_tunnel_header,
sizeof(bridge_tunnel_header))) ||
@@ -142,6 +145,12 @@ int mwifiex_process_rx_packet(struct mwifiex_private *priv,
return 0;
}

+ if (ISSUPP_TDLS_ENABLED(priv->adapter->fw_cap_info) &&
+ ntohs(rx_pkt_hdr->eth803_hdr.h_proto) == ETH_P_TDLS) {
+ offset = (u8 *)local_rx_pd + rx_pkt_off;
+ mwifiex_process_tdls_action_frame(priv, offset, rx_pkt_len);
+ }
+
priv->rxpd_rate = local_rx_pd->rx_rate;

priv->rxpd_htinfo = local_rx_pd->ht_info;
diff --git a/drivers/net/wireless/mwifiex/tdls.c b/drivers/net/wireless/mwifiex/tdls.c
index 73cd444..ba54037 100644
--- a/drivers/net/wireless/mwifiex/tdls.c
+++ b/drivers/net/wireless/mwifiex/tdls.c
@@ -16,6 +16,11 @@
*/

#include "main.h"
+#include "wmm.h"
+
+#define TDLS_REQ_FIX_LEN 6
+#define TDLS_RESP_FIX_LEN 8
+#define TDLS_CONFIRM_FIX_LEN 6

/* This function appends rate TLV to scan config command. */
static int
@@ -421,3 +426,117 @@ int mwifiex_send_tdls_action_frame(struct mwifiex_private *priv,

return 0;
}
+
+/* This function process tdls action frame from peer.
+ * Peer capabilities are stored into station node structure.
+ */
+void mwifiex_process_tdls_action_frame(struct mwifiex_private *priv,
+ u8 *buf, int len)
+{
+ struct mwifiex_sta_node *sta_ptr;
+ u8 *peer, *pos, *end;
+ u8 i, action, basic;
+ int ie_len = 0;
+
+ if (len < (sizeof(struct ethhdr) + 3))
+ return;
+ if (*(u8 *)(buf + sizeof(struct ethhdr)) != WLAN_TDLS_SNAP_RFTYPE)
+ return;
+ if (*(u8 *)(buf + sizeof(struct ethhdr) + 1) != WLAN_CATEGORY_TDLS)
+ return;
+
+ peer = buf + ETH_ALEN;
+ action = *(u8 *)(buf + sizeof(struct ethhdr) + 2);
+
+ /* just handle TDLS setup request/response/confirm */
+ if (action > WLAN_TDLS_SETUP_CONFIRM)
+ return;
+
+ dev_dbg(priv->adapter->dev,
+ "rx:tdls action: peer=%pM, action=%d\n", peer, action);
+
+ sta_ptr = mwifiex_add_sta_entry(priv, peer);
+ if (!sta_ptr)
+ return;
+
+ switch (action) {
+ case WLAN_TDLS_SETUP_REQUEST:
+ if (len < (sizeof(struct ethhdr) + TDLS_REQ_FIX_LEN))
+ return;
+
+ pos = buf + sizeof(struct ethhdr) + 4;
+ /* payload 1+ category 1 + action 1 + dialog 1 */
+ sta_ptr->tdls_cap.capab = cpu_to_le16(*(u16 *)pos);
+ ie_len = len - sizeof(struct ethhdr) - TDLS_REQ_FIX_LEN;
+ pos += 2;
+ break;
+
+ case WLAN_TDLS_SETUP_RESPONSE:
+ if (len < (sizeof(struct ethhdr) + TDLS_RESP_FIX_LEN))
+ return;
+ /* payload 1+ category 1 + action 1 + dialog 1 + status code 2*/
+ pos = buf + sizeof(struct ethhdr) + 6;
+ sta_ptr->tdls_cap.capab = cpu_to_le16(*(u16 *)pos);
+ ie_len = len - sizeof(struct ethhdr) - TDLS_RESP_FIX_LEN;
+ pos += 2;
+ break;
+
+ case WLAN_TDLS_SETUP_CONFIRM:
+ if (len < (sizeof(struct ethhdr) + TDLS_CONFIRM_FIX_LEN))
+ return;
+ pos = buf + sizeof(struct ethhdr) + TDLS_CONFIRM_FIX_LEN;
+ ie_len = len - sizeof(struct ethhdr) - TDLS_CONFIRM_FIX_LEN;
+ break;
+ default:
+ dev_warn(priv->adapter->dev, "Unknown TDLS frame type.\n");
+ return;
+ }
+
+ for (end = pos + ie_len; pos + 1 < end; pos += 2 + pos[1]) {
+ if (pos + 2 + pos[1] > end)
+ break;
+
+ switch (*pos) {
+ case WLAN_EID_SUPP_RATES:
+ sta_ptr->tdls_cap.rates_len = pos[1];
+ for (i = 0; i < pos[1]; i++)
+ sta_ptr->tdls_cap.rates[i] = pos[i + 2];
+ break;
+
+ case WLAN_EID_EXT_SUPP_RATES:
+ basic = sta_ptr->tdls_cap.rates_len;
+ for (i = 0; i < pos[1]; i++)
+ sta_ptr->tdls_cap.rates[basic + i] = pos[i + 2];
+ sta_ptr->tdls_cap.rates_len += pos[1];
+ break;
+ case WLAN_EID_HT_CAPABILITY:
+ memcpy((u8 *)&sta_ptr->tdls_cap.ht_capb, pos,
+ sizeof(struct ieee80211_ht_cap));
+ sta_ptr->is_11n_enabled = 1;
+ break;
+ case WLAN_EID_HT_OPERATION:
+ memcpy(&sta_ptr->tdls_cap.ht_oper, pos,
+ sizeof(struct ieee80211_ht_operation));
+ break;
+ case WLAN_EID_BSS_COEX_2040:
+ sta_ptr->tdls_cap.coex_2040 = pos[2];
+ break;
+ case WLAN_EID_EXT_CAPABILITY:
+ memcpy((u8 *)&sta_ptr->tdls_cap.extcap, pos,
+ sizeof(struct ieee_types_header) +
+ min_t(u8, pos[1], 8));
+ break;
+ case WLAN_EID_RSN:
+ memcpy((u8 *)&sta_ptr->tdls_cap.rsn_ie, pos,
+ sizeof(struct ieee_types_header) + pos[1]);
+ break;
+ case WLAN_EID_QOS_CAPA:
+ sta_ptr->tdls_cap.qos_info = pos[2];
+ break;
+ default:
+ break;
+ }
+ }
+
+ return;
+}
diff --git a/drivers/net/wireless/mwifiex/wmm.c b/drivers/net/wireless/mwifiex/wmm.c
index 2999c3b..557d363 100644
--- a/drivers/net/wireless/mwifiex/wmm.c
+++ b/drivers/net/wireless/mwifiex/wmm.c
@@ -374,8 +374,7 @@ mwifiex_wmm_convert_tos_to_ac(struct mwifiex_adapter *adapter, u32 tos)
* AP is disabled (due to call admission control (ACM bit). Mapping
* of TID to AC is taken care of internally.
*/
-static u8
-mwifiex_wmm_downgrade_tid(struct mwifiex_private *priv, u32 tid)
+u8 mwifiex_wmm_downgrade_tid(struct mwifiex_private *priv, u32 tid)
{
enum mwifiex_wmm_ac_e ac, ac_down;
u8 new_tid;
@@ -578,7 +577,7 @@ mwifiex_wmm_get_ralist_node(struct mwifiex_private *priv, u8 tid,
* If no such node is found, a new node is added first and then
* retrieved.
*/
-static struct mwifiex_ra_list_tbl *
+struct mwifiex_ra_list_tbl *
mwifiex_wmm_get_queue_raptr(struct mwifiex_private *priv, u8 tid, u8 *ra_addr)
{
struct mwifiex_ra_list_tbl *ra_list;
diff --git a/drivers/net/wireless/mwifiex/wmm.h b/drivers/net/wireless/mwifiex/wmm.h
index d4e6073..83e4208 100644
--- a/drivers/net/wireless/mwifiex/wmm.h
+++ b/drivers/net/wireless/mwifiex/wmm.h
@@ -122,5 +122,8 @@ void mwifiex_wmm_setup_queue_priorities(struct mwifiex_private *priv,
void mwifiex_wmm_setup_ac_downgrade(struct mwifiex_private *priv);
int mwifiex_ret_wmm_get_status(struct mwifiex_private *priv,
const struct host_cmd_ds_command *resp);
+struct mwifiex_ra_list_tbl *
+mwifiex_wmm_get_queue_raptr(struct mwifiex_private *priv, u8 tid, u8 *ra_addr);
+u8 mwifiex_wmm_downgrade_tid(struct mwifiex_private *priv, u32 tid);

#endif /* !_MWIFIEX_WMM_H_ */
--
1.8.2.3