/*
* Driver for RNDIS based wireless USB devices.
*/
// #define DEBUG // error path messages, extra info
// #define VERBOSE // more; success messages
#include <linux/module.h>
#include <linux/init.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/ethtool.h>
#include <linux/workqueue.h>
#include <linux/mutex.h>
#include <linux/mii.h>
#include <linux/usb.h>
#include <linux/usb/cdc.h>
#include <linux/ieee80211.h>
#include <linux/if_arp.h>
#include <linux/ctype.h>
#include <linux/spinlock.h>
#include <linux/slab.h>
#include <net/cfg80211.h>
#include <linux/usb/usbnet.h>
#include <linux/usb/rndis_host.h>
/* NOTE: All these are settings for Broadcom chipset */
static char modparam_country[4] = "EU";
module_param_string(country, modparam_country, 4, 0444);
MODULE_PARM_DESC(country, "Country code (ISO 3166-1 alpha-2), default: EU");
static int modparam_frameburst = 1;
module_param_named(frameburst, modparam_frameburst, int, 0444);
MODULE_PARM_DESC(frameburst, "enable frame bursting (default: on)");
static int modparam_afterburner = 0;
module_param_named(afterburner, modparam_afterburner, int, 0444);
MODULE_PARM_DESC(afterburner,
"enable afterburner aka '125 High Speed Mode' (default: off)");
static int modparam_power_save = 0;
module_param_named(power_save, modparam_power_save, int, 0444);
MODULE_PARM_DESC(power_save,
"set power save mode: 0=off, 1=on, 2=fast (default: off)");
static int modparam_power_output = 3;
module_param_named(power_output, modparam_power_output, int, 0444);
MODULE_PARM_DESC(power_output,
"set power output: 0=25%, 1=50%, 2=75%, 3=100% (default: 100%)");
static int modparam_roamtrigger = -70;
module_param_named(roamtrigger, modparam_roamtrigger, int, 0444);
MODULE_PARM_DESC(roamtrigger,
"set roaming dBm trigger: -80=optimize for distance, "
"-60=bandwidth (default: -70)");
static int modparam_roamdelta = 1;
module_param_named(roamdelta, modparam_roamdelta, int, 0444);
MODULE_PARM_DESC(roamdelta,
"set roaming tendency: 0=aggressive, 1=moderate, "
"2=conservative (default: moderate)");
static int modparam_workaround_interval;
module_param_named(workaround_interval, modparam_workaround_interval,
int, 0444);
MODULE_PARM_DESC(workaround_interval,
"set stall workaround interval in msecs (0=disabled) (default: 0)");
/* Typical noise/maximum signal level values taken from ndiswrapper iw_ndis.h */
#define WL_NOISE -96 /* typical noise level in dBm */
#define WL_SIGMAX -32 /* typical maximum signal level in dBm */
/* Assume that Broadcom 4320 (only chipset at time of writing known to be
* based on wireless rndis) has default txpower of 13dBm.
* This value is from Linksys WUSB54GSC User Guide, Appendix F: Specifications.
* 100% : 20 mW ~ 13dBm
* 75% : 15 mW ~ 12dBm
* 50% : 10 mW ~ 10dBm
* 25% : 5 mW ~ 7dBm
*/
#define BCM4320_DEFAULT_TXPOWER_DBM_100 13
#define BCM4320_DEFAULT_TXPOWER_DBM_75 12
#define BCM4320_DEFAULT_TXPOWER_DBM_50 10
#define BCM4320_DEFAULT_TXPOWER_DBM_25 7
/* Known device types */
#define RNDIS_UNKNOWN 0
#define RNDIS_BCM4320A 1
#define RNDIS_BCM4320B 2
/* NDIS data structures. Taken from wpa_supplicant driver_ndis.c
* slightly modified for datatype endianess, etc
*/
#define NDIS_802_11_LENGTH_SSID 32
#define NDIS_802_11_LENGTH_RATES 8
#define NDIS_802_11_LENGTH_RATES_EX 16
enum ndis_80211_net_type {
NDIS_80211_TYPE_FREQ_HOP,
NDIS_80211_TYPE_DIRECT_SEQ,
NDIS_80211_TYPE_OFDM_A,
NDIS_80211_TYPE_OFDM_G
};
enum ndis_80211_net_infra {
NDIS_80211_INFRA_ADHOC,
NDIS_80211_INFRA_INFRA,
NDIS_80211_INFRA_AUTO_UNKNOWN
};
enum ndis_80211_auth_mode {
NDIS_80211_AUTH_OPEN,
NDIS_80211_AUTH_SHARED,
NDIS_80211_AUTH_AUTO_SWITCH,
NDIS_80211_AUTH_WPA,
NDIS_80211_AUTH_WPA_PSK,
NDIS_80211_AUTH_WPA_NONE,
NDIS_80211_AUTH_WPA2,
NDIS_80211_AUTH_WPA2_PSK
};
enum ndis_80211_encr_status {
NDIS_80211_ENCR_WEP_ENABLED,
NDIS_80211_ENCR_DISABLED,
NDIS_80211_ENCR_WEP_KEY_ABSENT,
NDIS_80211_ENCR_NOT_SUPPORTED,
NDIS_80211_ENCR_TKIP_ENABLED,
NDIS_80211_ENCR_TKIP_KEY_ABSENT,
NDIS_80211_ENCR_CCMP_ENABLED,
NDIS_80211_ENCR_CCMP_KEY_ABSENT
};
enum ndis_80211_priv_filter {
NDIS_80211_PRIV_ACCEPT_ALL,
NDIS_80211_PRIV_8021X_WEP
};
enum ndis_80211_status_type {
NDIS_80211_STATUSTYPE_AUTHENTICATION,
NDIS_80211_STATUSTYPE_MEDIASTREAMMODE,
NDIS_80211_STATUSTYPE_PMKID_CANDIDATELIST,
NDIS_80211_STATUSTYPE_RADIOSTATE,
};
enum ndis_80211_media_stream_mode {
NDIS_80211_MEDIA_STREAM_OFF,
NDIS_80211_MEDIA_STREAM_ON
};
enum ndis_80211_radio_status {
NDIS_80211_RADIO_STATUS_ON,
NDIS_80211_RADIO_STATUS_HARDWARE_OFF,
NDIS_80211_RADIO_STATUS_SOFTWARE_OFF,
};
enum ndis_80211_addkey_bits {
NDIS_80211_ADDKEY_8021X_AUTH = cpu_to_le32(1 << 28),
NDIS_80211_ADDKEY_SET_INIT_RECV_SEQ = cpu_to_le32(1 << 29),
NDIS_80211_ADDKEY_PAIRWISE_KEY = cpu_to_le32(1 << 30),
NDIS_80211_ADDKEY_TRANSMIT_KEY = cpu_to_le32(1 << 31)
};
enum ndis_80211_addwep_bits {
NDIS_80211_ADDWEP_PERCLIENT_KEY = cpu_to_le32(1 << 30),
NDIS_80211_ADDWEP_TRANSMIT_KEY = cpu_to_le32(1 << 31)
};
enum ndis_80211_power_mode {
NDIS_80211_POWER_MODE_CAM,
NDIS_80211_POWER_MODE_MAX_PSP,
NDIS_80211_POWER_MODE_FAST_PSP,
};
enum ndis_80211_pmkid_cand_list_flag_bits {
NDIS_80211_PMKID_CAND_PREAUTH = cpu_to_le32(1 << 0)
};
struct ndis_80211_auth_request {
__le32 length;
u8 bssid[6];
u8 padding[2];
__le32 flags;
} __packed;
struct ndis_80211_pmkid_candidate {
u8 bssid[6];
u8 padding[2];
__le32 flags;
} __packed;
struct ndis_80211_pmkid_cand_list {
__le32 version;
__le32 num_candidates;
struct ndis_80211_pmkid_candidate candidate_list[0];
} __packed;
struct ndis_80211_status_indication {
__le32 status_type;
union {
__le32 media_stream_mode;
__le32 radio_status;
struct ndis_80211_auth_request auth_request[0];
struct ndis_80211_pmkid_cand_list cand_list;
} u;
} __packed;
struct ndis_80211_ssid {
__le32 length;
u8 essid[NDIS_802_11_LENGTH_SSID];
} __packed;
struct ndis_80211_conf_freq_hop {
__le32 length;
__le32 hop_pattern;
__le32 hop_set;
__le32 dwell_time;
} __packed;
struct ndis_80211_conf {
__le32 length;
__le32 beacon_period;
__le32 atim_window;
__le32 ds_config;
struct ndis_80211_conf_freq_hop fh_config;
} __packed;
struct ndis_80211_bssid_ex {
__le32 length;
u8 mac[6];
u8 padding[2];
struct ndis_80211_ssid ssid;
__le32 privacy;
__le32 rssi;
__le32 net_type;
struct ndis_80211_conf config;
__le32 net_infra;
u8 rates[NDIS_802_11_LENGTH_RATES_EX];
__le32 ie_length;
u8 ies[0];
} __packed;
struct ndis_80211_bssid_list_ex {
__le32 num_items;
struct ndis_80211_bssid_ex bssid[0];
} __packed;
struct ndis_80211_fixed_ies {
u8 timestamp[8];
__le16 beacon_interval;
__le16 capabilities;
} __packed;
struct ndis_80211_wep_key {
__le32 size;
__le32 index;
__le32 length;
u8 material[32];
} __packed;
struct ndis_80211_key {
__le32 size;
__le32 index;
__le32 length;
u8 bssid[6];
u8 padding[6];
u8 rsc[8];
u8 material[32];
} __packed;
struct ndis_80211_remove_key {
__le32 size;
__le32 index;
u8 bssid[6];
u8 padding[2];
} __packed;
struct ndis_config_param {
__le32 name_offs;
__le32 name_length;
__le32 type;
__le32 value_offs;
__le32 value_length;
} __packed;
struct ndis_80211_assoc_info {
__le32 length;
__le16 req_ies;
struct req_ie {
__le16 capa;
__le16 listen_interval;
u8 cur_ap_address[6];
} req_ie;
__le32 req_ie_length;
__le32 offset_req_ies;
__le16 resp_ies;
struct resp_ie {
__le16 capa;
__le16 status_code;
__le16 assoc_id;
} resp_ie;
__le32 resp_ie_length;
__le32 offset_resp_ies;
} __packed;
struct ndis_80211_auth_encr_pair {
__le32 auth_mode;
__le32 encr_mode;
} __packed;
struct ndis_80211_capability {
__le32 length;
__le32 version;
__le32 num_pmkids;
__le32 num_auth_encr_pair;
struct ndis_80211_auth_encr_pair auth_encr_pair[0];
} __packed;
struct ndis_80211_bssid_info {
u8 bssid[6];
u8 pmkid[16];
} __packed;
struct ndis_80211_pmkid {
__le32 length;
__le32 bssid_info_count;
struct
