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Linux Kernel
3.7.1
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All Data Structures Namespaces Files Functions Variables Typedefs Enumerations Enumerator Macros Groups Pages
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Linux Kernel
3.7.1
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#include <linux/skbuff.h>#include <linux/if_ether.h>#include <linux/spinlock.h>#include <net/mac80211.h>Go to the source code of this file.
Data Structures | |
| struct | ath_ani |
| struct | ath_cycle_counters |
| struct | reg_dmn_pair_mapping |
| struct | ath_regulatory |
| struct | ath_keyval |
| struct | ath_ops |
| struct | ath_common |
Macros | |
| #define | ATH_KEYMAX 128 /* max key cache size we handle */ |
| #define | ath_emerg(common, fmt,...) ath_printk(KERN_EMERG, common, fmt, ##__VA_ARGS__) |
| #define | ath_alert(common, fmt,...) ath_printk(KERN_ALERT, common, fmt, ##__VA_ARGS__) |
| #define | ath_crit(common, fmt,...) ath_printk(KERN_CRIT, common, fmt, ##__VA_ARGS__) |
| #define | ath_err(common, fmt,...) ath_printk(KERN_ERR, common, fmt, ##__VA_ARGS__) |
| #define | ath_warn(common, fmt,...) ath_printk(KERN_WARNING, common, fmt, ##__VA_ARGS__) |
| #define | ath_notice(common, fmt,...) ath_printk(KERN_NOTICE, common, fmt, ##__VA_ARGS__) |
| #define | ath_info(common, fmt,...) ath_printk(KERN_INFO, common, fmt, ##__VA_ARGS__) |
| #define | ATH_DBG_DEFAULT (ATH_DBG_FATAL) |
| #define | ath_dbg(common, dbg_mask, fmt,...) _ath_dbg(common, ATH_DBG_##dbg_mask, fmt, ##__VA_ARGS__) |
| #define | ATH_DBG_WARN(foo, arg...) do {} while (0) |
| #define | ATH_DBG_WARN_ON_ONCE(foo) |
Enumerations | |
| enum | ath_device_state { ATH_HW_UNAVAILABLE, ATH_HW_INITIALIZED } |
| enum | ath_bus_type { ATH_PCI, ATH_AHB, ATH_USB } |
| enum | ath_crypt_caps { ATH_CRYPT_CAP_CIPHER_AESCCM = BIT(0), ATH_CRYPT_CAP_MIC_COMBINED = BIT(1) } |
| enum | ath_cipher { ATH_CIPHER_WEP = 0, ATH_CIPHER_AES_OCB = 1, ATH_CIPHER_AES_CCM = 2, ATH_CIPHER_CKIP = 3, ATH_CIPHER_TKIP = 4, ATH_CIPHER_CLR = 5, ATH_CIPHER_MIC = 127 } |
| enum | ATH_DEBUG { ATH_DBG_RESET = 0x00000001, ATH_DBG_QUEUE = 0x00000002, ATH_DBG_EEPROM = 0x00000004, ATH_DBG_CALIBRATE = 0x00000008, ATH_DBG_INTERRUPT = 0x00000010, ATH_DBG_REGULATORY = 0x00000020, ATH_DBG_ANI = 0x00000040, ATH_DBG_XMIT = 0x00000080, ATH_DBG_BEACON = 0x00000100, ATH_DBG_CONFIG = 0x00000200, ATH_DBG_FATAL = 0x00000400, ATH_DBG_PS = 0x00000800, ATH_DBG_HWTIMER = 0x00001000, ATH_DBG_BTCOEX = 0x00002000, ATH_DBG_WMI = 0x00004000, ATH_DBG_BSTUCK = 0x00008000, ATH_DBG_MCI = 0x00010000, ATH_DBG_DFS = 0x00020000, ATH_DBG_WOW = 0x00040000, ATH_DBG_ANY = 0xffffffff } |
Variables | |
| struct ath_common * | common |
| struct ath_common const char * | fmt |
| #define ath_alert | ( | common, | |
| fmt, | |||
| ... | |||
| ) | ath_printk(KERN_ALERT, common, fmt, ##__VA_ARGS__) |
| #define ath_dbg | ( | common, | |
| dbg_mask, | |||
| fmt, | |||
| ... | |||
| ) | _ath_dbg(common, ATH_DBG_##dbg_mask, fmt, ##__VA_ARGS__) |
| #define ATH_DBG_DEFAULT (ATH_DBG_FATAL) |
| #define ATH_DBG_WARN | ( | foo, | |
| arg... | |||
| ) | do {} while (0) |
| #define ATH_DBG_WARN_ON_ONCE | ( | foo | ) |
| #define ath_emerg | ( | common, | |
| fmt, | |||
| ... | |||
| ) | ath_printk(KERN_EMERG, common, fmt, ##__VA_ARGS__) |
| #define ath_notice | ( | common, | |
| fmt, | |||
| ... | |||
| ) | ath_printk(KERN_NOTICE, common, fmt, ##__VA_ARGS__) |
| #define ath_warn | ( | common, | |
| fmt, | |||
| ... | |||
| ) | ath_printk(KERN_WARNING, common, fmt, ##__VA_ARGS__) |
| enum ath_bus_type |
| enum ath_cipher |
| enum ath_crypt_caps |
| enum ATH_DEBUG |
enum ath_debug_level - atheros wireless debug level
: reset processing : hardware queue management : eeprom processing : periodic calibration : interrupt processing : regulatory processing : adaptive noise immunitive processing : basic xmit operation : beacon handling : configuration of the hardware : fatal errors, this is the default, DBG_DEFAULT : power save processing : hardware timer handling : bluetooth coexistance : stuck beacons : Message Coexistence Interface, a private protocol used exclusively for WLAN-BT coexistence starting from AR9462. : radar datection : Wake on Wireless : enable all debugging
The debug level is used to control the amount and type of debugging output we want to see. Each driver has its own method for enabling debugging and modifying debug level states – but this is typically done through a module parameter 'debug' along with a respective 'debug' debugfs file entry.
| enum ath_device_state |
| __printf | ( | 3 | , |
| 4 | |||
| ) | const |
| void ath_hw_cycle_counters_update | ( | struct ath_common * | common | ) |
ath_hw_cycle_counters_update - common function to update cycle counters
: the ath_common struct for the device.
This function is used to update all cycle counters in one place. It has to be called while holding common->cc_lock!
| int32_t ath_hw_get_listen_time | ( | struct ath_common * | common | ) |
| void ath_hw_setbssidmask | ( | struct ath_common * | common | ) |
ath_hw_set_bssid_mask - filter out bssids we listen
: the ath_common struct for the device.
BSSID masking is a method used by AR5212 and newer hardware to inform PCU which bits of the interface's MAC address should be looked at when trying to decide which packets to ACK. In station mode and AP mode with a single BSS every bit matters since we lock to only one BSS. In AP mode with multiple BSSes (virtual interfaces) not every bit matters because hw must accept frames for all BSSes and so we tweak some bits of our mac address in order to have multiple BSSes.
NOTE: This is a simple filter and does not filter out all relevant frames. Some frames that are not for us might get ACKed from us by PCU because they just match the mask.
When handling multiple BSSes you can get the BSSID mask by computing the set of ~ ( MAC XOR BSSID ) for all bssids we handle.
When you do this you are essentially computing the common bits of all your BSSes. Later it is assumed the hardware will "and" (&) the BSSID mask with the MAC address to obtain the relevant bits and compare the result with (frame's BSSID & mask) to see if they match.
Simple example: on your card you have have two BSSes you have created with BSSID-01 and BSSID-02. Lets assume BSSID-01 will not use the MAC address. There is another BSSID-03 but you are not part of it. For simplicity's sake, assuming only 4 bits for a mac address and for BSSIDs you can then have:
\
MAC: 0001 | BSSID-01: 0100 | –> Belongs to us BSSID-02: 1001 |
Our bssid_mask would then be:
On loop iteration for BSSID-01:
~(0001 ^ 0100) -> ~(0101)
-> 1010
bssid_mask = 1010
On loop iteration for BSSID-02:
bssid_mask &= ~(0001 ^ 1001)
bssid_mask = (1010) & ~(0001 ^ 1001)
bssid_mask = (1010) & ~(1000)
bssid_mask = (1010) & (0111)
bssid_mask = 0010
A bssid_mask of 0010 means "only pay attention to the second least significant bit". This is because its the only bit common amongst the MAC and all BSSIDs we support. To findout what the real common bit is we can simply "&" the bssid_mask now with any BSSID we have or our MAC address (we assume the hardware uses the MAC address).
Now, suppose there's an incoming frame for BSSID-03:
IFRAME-01: 0110
An easy eye-inspeciton of this already should tell you that this frame will not pass our check. This is because the bssid_mask tells the hardware to only look at the second least significant bit and the common bit amongst the MAC and BSSIDs is 0, this frame has the 2nd LSB as 1, which does not match 0.
So with IFRAME-01 we assume the hardware will do:
allow = (IFRAME-01 & bssid_mask) == (bssid_mask & MAC) ? 1 : 0;
–> allow = (0110 & 0010) == (0010 & 0001) ? 1 : 0; –> allow = (0010) == 0000 ? 1 : 0; –> allow = 0
Lets now test a frame that should work:
IFRAME-02: 0001 (we should allow)
allow = (IFRAME-02 & bssid_mask) == (bssid_mask & MAC) ? 1 : 0;
–> allow = (0001 & 0010) == (0010 & 0001) ? 1 :0; –> allow = (0000) == (0000) –> allow = 1
Other examples:
IFRAME-03: 0100 –> allowed IFRAME-04: 1001 –> allowed IFRAME-05: 1101 –> allowed but its not for us!!!
| int ath_key_config | ( | struct ath_common * | common, |
| struct ieee80211_vif * | vif, | ||
| struct ieee80211_sta * | sta, | ||
| struct ieee80211_key_conf * | key | ||
| ) |
| void ath_key_delete | ( | struct ath_common * | common, |
| struct ieee80211_key_conf * | key | ||
| ) |
| struct ibmvfc_mad_common common |
1.8.2