1 // SPDX-License-Identifier: GPL-2.0
3 * Copyright (c) 2012 - 2018 Microchip Technology Inc., and its subsidiaries.
7 #include <linux/ieee80211.h>
9 #include "coreconfigurator.h"
11 #define TAG_PARAM_OFFSET (MAC_HDR_LEN + TIME_STAMP_LEN + \
12 BEACON_INTERVAL_LEN + CAP_INFO_LEN)
44 QOS_DATA_POLL_ACK = 0xB8,
45 QOS_NULL_FRAME = 0xC8,
47 QOS_CFPOLL_ACK = 0xF8,
50 FRAME_SUBTYPE_FORCE_32BIT = 0xFFFFFFFF
53 static inline u16 get_beacon_period(u8 *data)
58 bcn_per |= (data[1] << 8);
63 static inline u32 get_beacon_timestamp_lo(u8 *data)
66 u32 index = MAC_HDR_LEN;
68 time_stamp |= data[index++];
69 time_stamp |= (data[index++] << 8);
70 time_stamp |= (data[index++] << 16);
71 time_stamp |= (data[index] << 24);
76 static inline u32 get_beacon_timestamp_hi(u8 *data)
79 u32 index = (MAC_HDR_LEN + 4);
81 time_stamp |= data[index++];
82 time_stamp |= (data[index++] << 8);
83 time_stamp |= (data[index++] << 16);
84 time_stamp |= (data[index] << 24);
89 static inline enum sub_frame_type get_sub_type(u8 *header)
91 return ((enum sub_frame_type)(header[0] & 0xFC));
94 static inline u8 get_to_ds(u8 *header)
96 return (header[1] & 0x01);
99 static inline u8 get_from_ds(u8 *header)
101 return ((header[1] & 0x02) >> 1);
104 static inline void get_address1(u8 *msa, u8 *addr)
106 memcpy(addr, msa + 4, 6);
109 static inline void get_address2(u8 *msa, u8 *addr)
111 memcpy(addr, msa + 10, 6);
114 static inline void get_address3(u8 *msa, u8 *addr)
116 memcpy(addr, msa + 16, 6);
119 static inline void get_bssid(u8 *data, u8 *bssid)
121 if (get_from_ds(data) == 1)
122 get_address2(data, bssid);
123 else if (get_to_ds(data) == 1)
124 get_address1(data, bssid);
126 get_address3(data, bssid);
129 static inline void get_ssid(u8 *data, u8 *ssid, u8 *p_ssid_len)
133 len = data[TAG_PARAM_OFFSET + 1];
134 j = TAG_PARAM_OFFSET + 2;
136 if (len >= MAX_SSID_LEN)
139 for (i = 0; i < len; i++, j++)
147 static inline u16 get_cap_info(u8 *data)
150 u16 index = MAC_HDR_LEN;
151 enum sub_frame_type st;
153 st = get_sub_type(data);
155 if (st == BEACON || st == PROBE_RSP)
156 index += TIME_STAMP_LEN + BEACON_INTERVAL_LEN;
158 cap_info = data[index];
159 cap_info |= (data[index + 1] << 8);
164 static inline u16 get_asoc_status(u8 *data)
168 asoc_status = data[3];
169 return (asoc_status << 8) | data[2];
172 static u8 *get_tim_elm(u8 *msa, u16 rx_len, u16 tag_param_offset)
176 index = tag_param_offset;
178 while (index < (rx_len - FCS_LEN)) {
179 if (msa[index] == WLAN_EID_TIM)
181 index += (IE_HDR_LEN + msa[index + 1]);
187 static u8 get_current_channel_802_11n(u8 *msa, u16 rx_len)
191 index = TAG_PARAM_OFFSET;
192 while (index < (rx_len - FCS_LEN)) {
193 if (msa[index] == WLAN_EID_DS_PARAMS)
194 return msa[index + 2];
195 index += msa[index + 1] + IE_HDR_LEN;
201 s32 wilc_parse_network_info(u8 *msg_buffer,
202 struct network_info **ret_network_info)
204 struct network_info *network_info;
205 u8 *wid_val, *msa, *tim_elm, *ies;
207 u16 wid_len, rx_len, ies_len;
210 msg_type = msg_buffer[0];
215 wid_len = MAKE_WORD16(msg_buffer[6], msg_buffer[7]);
216 wid_val = &msg_buffer[8];
218 network_info = kzalloc(sizeof(*network_info), GFP_KERNEL);
222 network_info->rssi = wid_val[0];
226 rx_len = wid_len - 1;
227 network_info->cap_info = get_cap_info(msa);
228 network_info->tsf_lo = get_beacon_timestamp_lo(msa);
230 tsf_lo = get_beacon_timestamp_lo(msa);
231 tsf_hi = get_beacon_timestamp_hi(msa);
233 network_info->tsf_hi = tsf_lo | ((u64)tsf_hi << 32);
235 get_ssid(msa, network_info->ssid, &network_info->ssid_len);
236 get_bssid(msa, network_info->bssid);
238 network_info->ch = get_current_channel_802_11n(msa, rx_len
241 index = MAC_HDR_LEN + TIME_STAMP_LEN;
243 network_info->beacon_period = get_beacon_period(msa + index);
245 index += BEACON_INTERVAL_LEN + CAP_INFO_LEN;
247 tim_elm = get_tim_elm(msa, rx_len + FCS_LEN, index);
249 network_info->dtim_period = tim_elm[3];
250 ies = &msa[TAG_PARAM_OFFSET];
251 ies_len = rx_len - TAG_PARAM_OFFSET;
254 network_info->ies = kmemdup(ies, ies_len, GFP_KERNEL);
255 if (!network_info->ies) {
260 network_info->ies_len = ies_len;
262 *ret_network_info = network_info;
267 s32 wilc_parse_assoc_resp_info(u8 *buffer, u32 buffer_len,
268 struct connect_info *ret_conn_info)
273 ret_conn_info->status = get_asoc_status(buffer);
274 if (ret_conn_info->status == WLAN_STATUS_SUCCESS) {
275 ies = &buffer[CAP_INFO_LEN + STATUS_CODE_LEN + AID_LEN];
276 ies_len = buffer_len - (CAP_INFO_LEN + STATUS_CODE_LEN +
279 ret_conn_info->resp_ies = kmemdup(ies, ies_len, GFP_KERNEL);
280 if (!ret_conn_info->resp_ies)
283 ret_conn_info->resp_ies_len = ies_len;