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![Mihaela Muraru](/assets/img/avatar_default.png)
Simplify function returns by merging assignment and return into one command line. Delete unnecesarry return variable. Found with Coccinelle @@ expression e, ret; @@ -ret = +return e; -return ret Signed-off-by: Mihaela Muraru <mihaela.muraru21@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
387 lines
9.8 KiB
C
387 lines
9.8 KiB
C
#include "coreconfigurator.h"
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#include "wilc_wlan_if.h"
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#include "wilc_wlan.h"
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#include <linux/errno.h>
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#include <linux/slab.h>
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#define TAG_PARAM_OFFSET (MAC_HDR_LEN + TIME_STAMP_LEN + \
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BEACON_INTERVAL_LEN + CAP_INFO_LEN)
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enum basic_frame_type {
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FRAME_TYPE_CONTROL = 0x04,
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FRAME_TYPE_DATA = 0x08,
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FRAME_TYPE_MANAGEMENT = 0x00,
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FRAME_TYPE_RESERVED = 0x0C,
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FRAME_TYPE_FORCE_32BIT = 0xFFFFFFFF
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};
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enum sub_frame_type {
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ASSOC_REQ = 0x00,
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ASSOC_RSP = 0x10,
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REASSOC_REQ = 0x20,
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REASSOC_RSP = 0x30,
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PROBE_REQ = 0x40,
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PROBE_RSP = 0x50,
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BEACON = 0x80,
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ATIM = 0x90,
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DISASOC = 0xA0,
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AUTH = 0xB0,
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DEAUTH = 0xC0,
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ACTION = 0xD0,
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PS_POLL = 0xA4,
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RTS = 0xB4,
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CTS = 0xC4,
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ACK = 0xD4,
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CFEND = 0xE4,
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CFEND_ACK = 0xF4,
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DATA = 0x08,
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DATA_ACK = 0x18,
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DATA_POLL = 0x28,
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DATA_POLL_ACK = 0x38,
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NULL_FRAME = 0x48,
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CFACK = 0x58,
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CFPOLL = 0x68,
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CFPOLL_ACK = 0x78,
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QOS_DATA = 0x88,
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QOS_DATA_ACK = 0x98,
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QOS_DATA_POLL = 0xA8,
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QOS_DATA_POLL_ACK = 0xB8,
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QOS_NULL_FRAME = 0xC8,
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QOS_CFPOLL = 0xE8,
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QOS_CFPOLL_ACK = 0xF8,
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BLOCKACK_REQ = 0x84,
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BLOCKACK = 0x94,
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FRAME_SUBTYPE_FORCE_32BIT = 0xFFFFFFFF
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};
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enum info_element_id {
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ISSID = 0, /* Service Set Identifier */
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ISUPRATES = 1, /* Supported Rates */
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IFHPARMS = 2, /* FH parameter set */
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IDSPARMS = 3, /* DS parameter set */
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ICFPARMS = 4, /* CF parameter set */
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ITIM = 5, /* Traffic Information Map */
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IIBPARMS = 6, /* IBSS parameter set */
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ICOUNTRY = 7, /* Country element */
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IEDCAPARAMS = 12, /* EDCA parameter set */
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ITSPEC = 13, /* Traffic Specification */
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ITCLAS = 14, /* Traffic Classification */
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ISCHED = 15, /* Schedule */
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ICTEXT = 16, /* Challenge Text */
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IPOWERCONSTRAINT = 32, /* Power Constraint */
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IPOWERCAPABILITY = 33, /* Power Capability */
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ITPCREQUEST = 34, /* TPC Request */
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ITPCREPORT = 35, /* TPC Report */
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ISUPCHANNEL = 36, /* Supported channel list */
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ICHSWANNOUNC = 37, /* Channel Switch Announcement */
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IMEASUREMENTREQUEST = 38, /* Measurement request */
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IMEASUREMENTREPORT = 39, /* Measurement report */
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IQUIET = 40, /* Quiet element Info */
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IIBSSDFS = 41, /* IBSS DFS */
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IERPINFO = 42, /* ERP Information */
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ITSDELAY = 43, /* TS Delay */
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ITCLASPROCESS = 44, /* TCLAS Processing */
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IHTCAP = 45, /* HT Capabilities */
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IQOSCAP = 46, /* QoS Capability */
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IRSNELEMENT = 48, /* RSN Information Element */
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IEXSUPRATES = 50, /* Extended Supported Rates */
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IEXCHSWANNOUNC = 60, /* Extended Ch Switch Announcement*/
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IHTOPERATION = 61, /* HT Information */
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ISECCHOFF = 62, /* Secondary Channel Offeset */
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I2040COEX = 72, /* 20/40 Coexistence IE */
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I2040INTOLCHREPORT = 73, /* 20/40 Intolerant channel report*/
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IOBSSSCAN = 74, /* OBSS Scan parameters */
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IEXTCAP = 127, /* Extended capability */
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IWMM = 221, /* WMM parameters */
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IWPAELEMENT = 221, /* WPA Information Element */
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INFOELEM_ID_FORCE_32BIT = 0xFFFFFFFF
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};
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static inline u16 get_beacon_period(u8 *data)
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{
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u16 bcn_per;
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bcn_per = data[0];
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bcn_per |= (data[1] << 8);
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return bcn_per;
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}
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static inline u32 get_beacon_timestamp_lo(u8 *data)
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{
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u32 time_stamp = 0;
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u32 index = MAC_HDR_LEN;
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time_stamp |= data[index++];
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time_stamp |= (data[index++] << 8);
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time_stamp |= (data[index++] << 16);
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time_stamp |= (data[index] << 24);
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return time_stamp;
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}
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static inline u32 get_beacon_timestamp_hi(u8 *data)
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{
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u32 time_stamp = 0;
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u32 index = (MAC_HDR_LEN + 4);
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time_stamp |= data[index++];
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time_stamp |= (data[index++] << 8);
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time_stamp |= (data[index++] << 16);
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time_stamp |= (data[index] << 24);
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return time_stamp;
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}
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static inline enum sub_frame_type get_sub_type(u8 *header)
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{
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return ((enum sub_frame_type)(header[0] & 0xFC));
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}
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static inline u8 get_to_ds(u8 *header)
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{
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return (header[1] & 0x01);
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}
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static inline u8 get_from_ds(u8 *header)
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{
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return ((header[1] & 0x02) >> 1);
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}
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static inline void get_address1(u8 *pu8msa, u8 *addr)
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{
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memcpy(addr, pu8msa + 4, 6);
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}
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static inline void get_address2(u8 *pu8msa, u8 *addr)
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{
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memcpy(addr, pu8msa + 10, 6);
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}
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static inline void get_address3(u8 *pu8msa, u8 *addr)
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{
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memcpy(addr, pu8msa + 16, 6);
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}
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static inline void get_BSSID(u8 *data, u8 *bssid)
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{
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if (get_from_ds(data) == 1)
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get_address2(data, bssid);
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else if (get_to_ds(data) == 1)
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get_address1(data, bssid);
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else
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get_address3(data, bssid);
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}
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static inline void get_ssid(u8 *data, u8 *ssid, u8 *p_ssid_len)
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{
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u8 len = 0;
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u8 i = 0;
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u8 j = 0;
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len = data[TAG_PARAM_OFFSET + 1];
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j = TAG_PARAM_OFFSET + 2;
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if (len >= MAX_SSID_LEN)
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len = 0;
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for (i = 0; i < len; i++, j++)
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ssid[i] = data[j];
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ssid[len] = '\0';
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*p_ssid_len = len;
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}
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static inline u16 get_cap_info(u8 *data)
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{
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u16 cap_info = 0;
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u16 index = MAC_HDR_LEN;
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enum sub_frame_type st;
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st = get_sub_type(data);
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if ((st == BEACON) || (st == PROBE_RSP))
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index += TIME_STAMP_LEN + BEACON_INTERVAL_LEN;
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cap_info = data[index];
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cap_info |= (data[index + 1] << 8);
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return cap_info;
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}
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static inline u16 get_assoc_resp_cap_info(u8 *data)
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{
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u16 cap_info;
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cap_info = data[0];
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cap_info |= (data[1] << 8);
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return cap_info;
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}
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static inline u16 get_asoc_status(u8 *data)
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{
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u16 asoc_status;
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asoc_status = data[3];
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return (asoc_status << 8) | data[2];
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}
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static inline u16 get_asoc_id(u8 *data)
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{
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u16 asoc_id;
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asoc_id = data[4];
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asoc_id |= (data[5] << 8);
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return asoc_id;
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}
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static u8 *get_tim_elm(u8 *pu8msa, u16 rx_len, u16 tag_param_offset)
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{
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u16 index;
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index = tag_param_offset;
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while (index < (rx_len - FCS_LEN)) {
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if (pu8msa[index] == ITIM)
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return &pu8msa[index];
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index += (IE_HDR_LEN + pu8msa[index + 1]);
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}
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return NULL;
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}
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static u8 get_current_channel_802_11n(u8 *pu8msa, u16 rx_len)
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{
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u16 index;
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index = TAG_PARAM_OFFSET;
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while (index < (rx_len - FCS_LEN)) {
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if (pu8msa[index] == IDSPARMS)
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return pu8msa[index + 2];
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index += pu8msa[index + 1] + IE_HDR_LEN;
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}
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return 0;
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}
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s32 wilc_parse_network_info(u8 *msg_buffer,
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struct network_info **ret_network_info)
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{
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struct network_info *network_info = NULL;
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u8 msg_type = 0;
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u8 msg_id = 0;
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u16 msg_len = 0;
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u16 wid_id = (u16)WID_NIL;
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u16 wid_len = 0;
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u8 *wid_val = NULL;
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msg_type = msg_buffer[0];
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if ('N' != msg_type)
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return -EFAULT;
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msg_id = msg_buffer[1];
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msg_len = MAKE_WORD16(msg_buffer[2], msg_buffer[3]);
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wid_id = MAKE_WORD16(msg_buffer[4], msg_buffer[5]);
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wid_len = MAKE_WORD16(msg_buffer[6], msg_buffer[7]);
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wid_val = &msg_buffer[8];
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{
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u8 *msa = NULL;
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u16 rx_len = 0;
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u8 *tim_elm = NULL;
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u8 *ies = NULL;
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u16 ies_len = 0;
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u8 index = 0;
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u32 tsf_lo;
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u32 tsf_hi;
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network_info = kzalloc(sizeof(*network_info), GFP_KERNEL);
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if (!network_info)
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return -ENOMEM;
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network_info->rssi = wid_val[0];
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msa = &wid_val[1];
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rx_len = wid_len - 1;
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network_info->cap_info = get_cap_info(msa);
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network_info->tsf_lo = get_beacon_timestamp_lo(msa);
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tsf_lo = get_beacon_timestamp_lo(msa);
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tsf_hi = get_beacon_timestamp_hi(msa);
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network_info->tsf_hi = tsf_lo | ((u64)tsf_hi << 32);
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get_ssid(msa, network_info->ssid, &network_info->ssid_len);
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get_BSSID(msa, network_info->bssid);
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network_info->ch = get_current_channel_802_11n(msa,
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rx_len + FCS_LEN);
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index = MAC_HDR_LEN + TIME_STAMP_LEN;
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network_info->beacon_period = get_beacon_period(msa + index);
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index += BEACON_INTERVAL_LEN + CAP_INFO_LEN;
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tim_elm = get_tim_elm(msa, rx_len + FCS_LEN, index);
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if (tim_elm)
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network_info->dtim_period = tim_elm[3];
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ies = &msa[TAG_PARAM_OFFSET];
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ies_len = rx_len - TAG_PARAM_OFFSET;
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if (ies_len > 0) {
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network_info->ies = kmemdup(ies, ies_len, GFP_KERNEL);
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if (!network_info->ies) {
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kfree(network_info);
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return -ENOMEM;
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}
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}
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network_info->ies_len = ies_len;
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}
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*ret_network_info = network_info;
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return 0;
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}
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s32 wilc_parse_assoc_resp_info(u8 *buffer, u32 buffer_len,
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struct connect_resp_info **ret_connect_resp_info)
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{
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struct connect_resp_info *connect_resp_info = NULL;
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u16 assoc_resp_len = 0;
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u8 *ies = NULL;
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u16 ies_len = 0;
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connect_resp_info = kzalloc(sizeof(*connect_resp_info), GFP_KERNEL);
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if (!connect_resp_info)
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return -ENOMEM;
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assoc_resp_len = (u16)buffer_len;
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connect_resp_info->status = get_asoc_status(buffer);
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if (connect_resp_info->status == SUCCESSFUL_STATUSCODE) {
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connect_resp_info->capability = get_assoc_resp_cap_info(buffer);
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connect_resp_info->assoc_id = get_asoc_id(buffer);
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ies = &buffer[CAP_INFO_LEN + STATUS_CODE_LEN + AID_LEN];
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ies_len = assoc_resp_len - (CAP_INFO_LEN + STATUS_CODE_LEN +
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AID_LEN);
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connect_resp_info->ies = kmemdup(ies, ies_len, GFP_KERNEL);
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if (!connect_resp_info->ies) {
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kfree(connect_resp_info);
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return -ENOMEM;
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}
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connect_resp_info->ies_len = ies_len;
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}
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*ret_connect_resp_info = connect_resp_info;
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return 0;
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}
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