diff options
Diffstat (limited to 'drivers/net/wireless/legacy/rndis_wlan.c')
| -rw-r--r-- | drivers/net/wireless/legacy/rndis_wlan.c | 3760 |
1 files changed, 3760 insertions, 0 deletions
diff --git a/drivers/net/wireless/legacy/rndis_wlan.c b/drivers/net/wireless/legacy/rndis_wlan.c new file mode 100644 index 000000000000..712038d46bdb --- /dev/null +++ b/drivers/net/wireless/legacy/rndis_wlan.c @@ -0,0 +1,3760 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Driver for RNDIS based wireless USB devices. + * + * Copyright (C) 2007 by Bjorge Dijkstra <bjd@jooz.net> + * Copyright (C) 2008-2009 by Jussi Kivilinna <jussi.kivilinna@iki.fi> + * + * Portions of this file are based on NDISwrapper project, + * Copyright (C) 2003-2005 Pontus Fuchs, Giridhar Pemmasani + * http://ndiswrapper.sourceforge.net/ + */ + +// #define DEBUG // error path messages, extra info +// #define VERBOSE // more; success messages + +#include <linux/module.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[ETH_ALEN]; + u8 padding[2]; + __le32 flags; +} __packed; + +struct ndis_80211_pmkid_candidate { + u8 bssid[ETH_ALEN]; + u8 padding[2]; + __le32 flags; +} __packed; + +struct ndis_80211_pmkid_cand_list { + __le32 version; + __le32 num_candidates; + struct ndis_80211_pmkid_candidate candidate_list[]; +} __packed; + +struct ndis_80211_status_indication { + __le32 status_type; + union { + __le32 media_stream_mode; + __le32 radio_status; + DECLARE_FLEX_ARRAY(struct ndis_80211_auth_request, auth_request); + 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[ETH_ALEN]; + 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[]; +} __packed; + +struct ndis_80211_bssid_list_ex { + __le32 num_items; + u8 bssid_data[]; +} __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[ETH_ALEN]; + u8 padding[6]; + u8 rsc[8]; + u8 material[32]; +} __packed; + +struct ndis_80211_remove_key { + __le32 size; + __le32 index; + u8 bssid[ETH_ALEN]; + 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[ETH_ALEN]; + } 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_capability { + __le32 length; + __le32 version; + __le32 num_pmkids; + __le32 num_auth_encr_pair; +} __packed; + +struct ndis_80211_bssid_info { + u8 bssid[ETH_ALEN]; + u8 pmkid[16]; +} __packed; + +struct ndis_80211_pmkid { + __le32 length; + __le32 bssid_info_count; + struct ndis_80211_bssid_info bssid_info[]; +} __packed; + +/* + * private data + */ +#define CAP_MODE_80211A 1 +#define CAP_MODE_80211B 2 +#define CAP_MODE_80211G 4 +#define CAP_MODE_MASK 7 + +#define WORK_LINK_UP 0 +#define WORK_LINK_DOWN 1 +#define WORK_SET_MULTICAST_LIST 2 + +#define RNDIS_WLAN_ALG_NONE 0 +#define RNDIS_WLAN_ALG_WEP (1<<0) +#define RNDIS_WLAN_ALG_TKIP (1<<1) +#define RNDIS_WLAN_ALG_CCMP (1<<2) + +#define RNDIS_WLAN_NUM_KEYS 4 +#define RNDIS_WLAN_KEY_MGMT_NONE 0 +#define RNDIS_WLAN_KEY_MGMT_802_1X (1<<0) +#define RNDIS_WLAN_KEY_MGMT_PSK (1<<1) + +#define COMMAND_BUFFER_SIZE (CONTROL_BUFFER_SIZE + sizeof(struct rndis_set)) + +static const struct ieee80211_channel rndis_channels[] = { + { .center_freq = 2412 }, + { .center_freq = 2417 }, + { .center_freq = 2422 }, + { .center_freq = 2427 }, + { .center_freq = 2432 }, + { .center_freq = 2437 }, + { .center_freq = 2442 }, + { .center_freq = 2447 }, + { .center_freq = 2452 }, + { .center_freq = 2457 }, + { .center_freq = 2462 }, + { .center_freq = 2467 }, + { .center_freq = 2472 }, + { .center_freq = 2484 }, +}; + +static const struct ieee80211_rate rndis_rates[] = { + { .bitrate = 10 }, + { .bitrate = 20, .flags = IEEE80211_RATE_SHORT_PREAMBLE }, + { .bitrate = 55, .flags = IEEE80211_RATE_SHORT_PREAMBLE }, + { .bitrate = 110, .flags = IEEE80211_RATE_SHORT_PREAMBLE }, + { .bitrate = 60 }, + { .bitrate = 90 }, + { .bitrate = 120 }, + { .bitrate = 180 }, + { .bitrate = 240 }, + { .bitrate = 360 }, + { .bitrate = 480 }, + { .bitrate = 540 } +}; + +static const u32 rndis_cipher_suites[] = { + WLAN_CIPHER_SUITE_WEP40, + WLAN_CIPHER_SUITE_WEP104, + WLAN_CIPHER_SUITE_TKIP, + WLAN_CIPHER_SUITE_CCMP, +}; + +struct rndis_wlan_encr_key { + int len; + u32 cipher; + u8 material[32]; + u8 bssid[ETH_ALEN]; + bool pairwise; + bool tx_key; +}; + +/* RNDIS device private data */ +struct rndis_wlan_private { + struct usbnet *usbdev; + + struct wireless_dev wdev; + + struct cfg80211_scan_request *scan_request; + + struct workqueue_struct *workqueue; + struct delayed_work dev_poller_work; + struct delayed_work scan_work; + struct work_struct work; + struct mutex command_lock; + unsigned long work_pending; + int last_qual; + s32 cqm_rssi_thold; + u32 cqm_rssi_hyst; + int last_cqm_event_rssi; + + struct ieee80211_supported_band band; + struct ieee80211_channel channels[ARRAY_SIZE(rndis_channels)]; + struct ieee80211_rate rates[ARRAY_SIZE(rndis_rates)]; + u32 cipher_suites[ARRAY_SIZE(rndis_cipher_suites)]; + + int device_type; + int caps; + int multicast_size; + + /* module parameters */ + char param_country[4]; + int param_frameburst; + int param_afterburner; + int param_power_save; + int param_power_output; + int param_roamtrigger; + int param_roamdelta; + u32 param_workaround_interval; + + /* hardware state */ + bool radio_on; + int power_mode; + int infra_mode; + bool connected; + u8 bssid[ETH_ALEN]; + u32 current_command_oid; + + /* encryption stuff */ + u8 encr_tx_key_index; + struct rndis_wlan_encr_key encr_keys[RNDIS_WLAN_NUM_KEYS]; + int wpa_version; + + u8 command_buffer[COMMAND_BUFFER_SIZE]; +}; + +/* + * cfg80211 ops + */ +static int rndis_change_virtual_intf(struct wiphy *wiphy, + struct net_device *dev, + enum nl80211_iftype type, + struct vif_params *params); + +static int rndis_scan(struct wiphy *wiphy, + struct cfg80211_scan_request *request); + +static int rndis_set_wiphy_params(struct wiphy *wiphy, u32 changed); + +static int rndis_set_tx_power(struct wiphy *wiphy, + struct wireless_dev *wdev, + enum nl80211_tx_power_setting type, + int mbm); +static int rndis_get_tx_power(struct wiphy *wiphy, + struct wireless_dev *wdev, + int *dbm); + +static int rndis_connect(struct wiphy *wiphy, struct net_device *dev, + struct cfg80211_connect_params *sme); + +static int rndis_disconnect(struct wiphy *wiphy, struct net_device *dev, + u16 reason_code); + +static int rndis_join_ibss(struct wiphy *wiphy, struct net_device *dev, + struct cfg80211_ibss_params *params); + +static int rndis_leave_ibss(struct wiphy *wiphy, struct net_device *dev); + +static int rndis_add_key(struct wiphy *wiphy, struct net_device *netdev, + int link_id, u8 key_index, bool pairwise, + const u8 *mac_addr, struct key_params *params); + +static int rndis_del_key(struct wiphy *wiphy, struct net_device *netdev, + int link_id, u8 key_index, bool pairwise, + const u8 *mac_addr); + +static int rndis_set_default_key(struct wiphy *wiphy, struct net_device *netdev, + int link_id, u8 key_index, bool unicast, + bool multicast); + +static int rndis_get_station(struct wiphy *wiphy, struct net_device *dev, + const u8 *mac, struct station_info *sinfo); + +static int rndis_dump_station(struct wiphy *wiphy, struct net_device *dev, + int idx, u8 *mac, struct station_info *sinfo); + +static int rndis_set_pmksa(struct wiphy *wiphy, struct net_device *netdev, + struct cfg80211_pmksa *pmksa); + +static int rndis_del_pmksa(struct wiphy *wiphy, struct net_device *netdev, + struct cfg80211_pmksa *pmksa); + +static int rndis_flush_pmksa(struct wiphy *wiphy, struct net_device *netdev); + +static int rndis_set_power_mgmt(struct wiphy *wiphy, struct net_device *dev, + bool enabled, int timeout); + +static int rndis_set_cqm_rssi_config(struct wiphy *wiphy, + struct net_device *dev, + s32 rssi_thold, u32 rssi_hyst); + +static const struct cfg80211_ops rndis_config_ops = { + .change_virtual_intf = rndis_change_virtual_intf, + .scan = rndis_scan, + .set_wiphy_params = rndis_set_wiphy_params, + .set_tx_power = rndis_set_tx_power, + .get_tx_power = rndis_get_tx_power, + .connect = rndis_connect, + .disconnect = rndis_disconnect, + .join_ibss = rndis_join_ibss, + .leave_ibss = rndis_leave_ibss, + .add_key = rndis_add_key, + .del_key = rndis_del_key, + .set_default_key = rndis_set_default_key, + .get_station = rndis_get_station, + .dump_station = rndis_dump_station, + .set_pmksa = rndis_set_pmksa, + .del_pmksa = rndis_del_pmksa, + .flush_pmksa = rndis_flush_pmksa, + .set_power_mgmt = rndis_set_power_mgmt, + .set_cqm_rssi_config = rndis_set_cqm_rssi_config, +}; + +static void *rndis_wiphy_privid = &rndis_wiphy_privid; + + +static struct rndis_wlan_private *get_rndis_wlan_priv(struct usbnet *dev) +{ + return (struct rndis_wlan_private *)dev->driver_priv; +} + +static u32 get_bcm4320_power_dbm(struct rndis_wlan_private *priv) +{ + switch (priv->param_power_output) { + default: + case 3: + return BCM4320_DEFAULT_TXPOWER_DBM_100; + case 2: + return BCM4320_DEFAULT_TXPOWER_DBM_75; + case 1: + return BCM4320_DEFAULT_TXPOWER_DBM_50; + case 0: + return BCM4320_DEFAULT_TXPOWER_DBM_25; + } +} + +static bool is_wpa_key(struct rndis_wlan_private *priv, u8 idx) +{ + int cipher = priv->encr_keys[idx].cipher; + + return (cipher == WLAN_CIPHER_SUITE_CCMP || + cipher == WLAN_CIPHER_SUITE_TKIP); +} + +static int rndis_cipher_to_alg(u32 cipher) +{ + switch (cipher) { + default: + return RNDIS_WLAN_ALG_NONE; + case WLAN_CIPHER_SUITE_WEP40: + case WLAN_CIPHER_SUITE_WEP104: + return RNDIS_WLAN_ALG_WEP; + case WLAN_CIPHER_SUITE_TKIP: + return RNDIS_WLAN_ALG_TKIP; + case WLAN_CIPHER_SUITE_CCMP: + return RNDIS_WLAN_ALG_CCMP; + } +} + +static int rndis_akm_suite_to_key_mgmt(u32 akm_suite) +{ + switch (akm_suite) { + default: + return RNDIS_WLAN_KEY_MGMT_NONE; + case WLAN_AKM_SUITE_8021X: + return RNDIS_WLAN_KEY_MGMT_802_1X; + case WLAN_AKM_SUITE_PSK: + return RNDIS_WLAN_KEY_MGMT_PSK; + } +} + +#ifdef DEBUG +static const char *oid_to_string(u32 oid) +{ + switch (oid) { +#define OID_STR(oid) case oid: return(#oid) + /* from rndis_host.h */ + OID_STR(RNDIS_OID_802_3_PERMANENT_ADDRESS); + OID_STR(RNDIS_OID_GEN_MAXIMUM_FRAME_SIZE); + OID_STR(RNDIS_OID_GEN_CURRENT_PACKET_FILTER); + OID_STR(RNDIS_OID_GEN_PHYSICAL_MEDIUM); + + /* from rndis_wlan.c */ + OID_STR(RNDIS_OID_GEN_LINK_SPEED); + OID_STR(RNDIS_OID_GEN_RNDIS_CONFIG_PARAMETER); + + OID_STR(RNDIS_OID_GEN_XMIT_OK); + OID_STR(RNDIS_OID_GEN_RCV_OK); + OID_STR(RNDIS_OID_GEN_XMIT_ERROR); + OID_STR(RNDIS_OID_GEN_RCV_ERROR); + OID_STR(RNDIS_OID_GEN_RCV_NO_BUFFER); + + OID_STR(RNDIS_OID_802_3_CURRENT_ADDRESS); + OID_STR(RNDIS_OID_802_3_MULTICAST_LIST); + OID_STR(RNDIS_OID_802_3_MAXIMUM_LIST_SIZE); + + OID_STR(RNDIS_OID_802_11_BSSID); + OID_STR(RNDIS_OID_802_11_SSID); + OID_STR(RNDIS_OID_802_11_INFRASTRUCTURE_MODE); + OID_STR(RNDIS_OID_802_11_ADD_WEP); + OID_STR(RNDIS_OID_802_11_REMOVE_WEP); + OID_STR(RNDIS_OID_802_11_DISASSOCIATE); + OID_STR(RNDIS_OID_802_11_AUTHENTICATION_MODE); + OID_STR(RNDIS_OID_802_11_PRIVACY_FILTER); + OID_STR(RNDIS_OID_802_11_BSSID_LIST_SCAN); + OID_STR(RNDIS_OID_802_11_ENCRYPTION_STATUS); + OID_STR(RNDIS_OID_802_11_ADD_KEY); + OID_STR(RNDIS_OID_802_11_REMOVE_KEY); + OID_STR(RNDIS_OID_802_11_ASSOCIATION_INFORMATION); + OID_STR(RNDIS_OID_802_11_CAPABILITY); + OID_STR(RNDIS_OID_802_11_PMKID); + OID_STR(RNDIS_OID_802_11_NETWORK_TYPES_SUPPORTED); + OID_STR(RNDIS_OID_802_11_NETWORK_TYPE_IN_USE); + OID_STR(RNDIS_OID_802_11_TX_POWER_LEVEL); + OID_STR(RNDIS_OID_802_11_RSSI); + OID_STR(RNDIS_OID_802_11_RSSI_TRIGGER); + OID_STR(RNDIS_OID_802_11_FRAGMENTATION_THRESHOLD); + OID_STR(RNDIS_OID_802_11_RTS_THRESHOLD); + OID_STR(RNDIS_OID_802_11_SUPPORTED_RATES); + OID_STR(RNDIS_OID_802_11_CONFIGURATION); + OID_STR(RNDIS_OID_802_11_POWER_MODE); + OID_STR(RNDIS_OID_802_11_BSSID_LIST); +#undef OID_STR + } + + return "?"; +} +#else +static const char *oid_to_string(u32 oid) +{ + return "?"; +} +#endif + +/* translate error code */ +static int rndis_error_status(__le32 rndis_status) +{ + int ret = -EINVAL; + switch (le32_to_cpu(rndis_status)) { + case RNDIS_STATUS_SUCCESS: + ret = 0; + break; + case RNDIS_STATUS_FAILURE: + case RNDIS_STATUS_INVALID_DATA: + ret = -EINVAL; + break; + case RNDIS_STATUS_NOT_SUPPORTED: + ret = -EOPNOTSUPP; + break; + case RNDIS_STATUS_ADAPTER_NOT_READY: + case RNDIS_STATUS_ADAPTER_NOT_OPEN: + ret = -EBUSY; + break; + } + return ret; +} + +static int rndis_query_oid(struct usbnet *dev, u32 oid, void *data, int *len) +{ + struct rndis_wlan_private *priv = get_rndis_wlan_priv(dev); + union { + void *buf; + struct rndis_msg_hdr *header; + struct rndis_query *get; + struct rndis_query_c *get_c; + } u; + int ret; + size_t buflen, resplen, respoffs, copylen; + + buflen = *len + sizeof(*u.get); + if (buflen < CONTROL_BUFFER_SIZE) + buflen = CONTROL_BUFFER_SIZE; + + if (buflen > COMMAND_BUFFER_SIZE) { + u.buf = kmalloc(buflen, GFP_KERNEL); + if (!u.buf) + return -ENOMEM; + } else { + u.buf = priv->command_buffer; + } + + mutex_lock(&priv->command_lock); + + memset(u.get, 0, sizeof *u.get); + u.get->msg_type = cpu_to_le32(RNDIS_MSG_QUERY); + u.get->msg_len = cpu_to_le32(sizeof *u.get); + u.get->oid = cpu_to_le32(oid); + + priv->current_command_oid = oid; + ret = rndis_command(dev, u.header, buflen); + priv->current_command_oid = 0; + if (ret < 0) + netdev_dbg(dev->net, "%s(%s): rndis_command() failed, %d (%08x)\n", + __func__, oid_to_string(oid), ret, + le32_to_cpu(u.get_c->status)); + + if (ret == 0) { + resplen = le32_to_cpu(u.get_c->len); + respoffs = le32_to_cpu(u.get_c->offset) + 8; + + if (respoffs > buflen) { + /* Device returned data offset outside buffer, error. */ + netdev_dbg(dev->net, + "%s(%s): received invalid data offset: %zu > %zu\n", + __func__, oid_to_string(oid), respoffs, buflen); + + ret = -EINVAL; + goto exit_unlock; + } + + copylen = min(resplen, buflen - respoffs); + + if (copylen > *len) + copylen = *len; + + memcpy(data, u.buf + respoffs, copylen); + + *len = resplen; + + ret = rndis_error_status(u.get_c->status); + if (ret < 0) + netdev_dbg(dev->net, "%s(%s): device returned error, 0x%08x (%d)\n", + __func__, oid_to_string(oid), + le32_to_cpu(u.get_c->status), ret); + } + +exit_unlock: + mutex_unlock(&priv->command_lock); + + if (u.buf != priv->command_buffer) + kfree(u.buf); + return ret; +} + +static int rndis_set_oid(struct usbnet *dev, u32 oid, const void *data, + int len) +{ + struct rndis_wlan_private *priv = get_rndis_wlan_priv(dev); + union { + void *buf; + struct rndis_msg_hdr *header; + struct rndis_set *set; + struct rndis_set_c *set_c; + } u; + int ret, buflen; + + buflen = len + sizeof(*u.set); + if (buflen < CONTROL_BUFFER_SIZE) + buflen = CONTROL_BUFFER_SIZE; + + if (buflen > COMMAND_BUFFER_SIZE) { + u.buf = kmalloc(buflen, GFP_KERNEL); + if (!u.buf) + return -ENOMEM; + } else { + u.buf = priv->command_buffer; + } + + mutex_lock(&priv->command_lock); + + memset(u.set, 0, sizeof *u.set); + u.set->msg_type = cpu_to_le32(RNDIS_MSG_SET); + u.set->msg_len = cpu_to_le32(sizeof(*u.set) + len); + u.set->oid = cpu_to_le32(oid); + u.set->len = cpu_to_le32(len); + u.set->offset = cpu_to_le32(sizeof(*u.set) - 8); + u.set->handle = cpu_to_le32(0); + memcpy(u.buf + sizeof(*u.set), data, len); + + priv->current_command_oid = oid; + ret = rndis_command(dev, u.header, buflen); + priv->current_command_oid = 0; + if (ret < 0) + netdev_dbg(dev->net, "%s(%s): rndis_command() failed, %d (%08x)\n", + __func__, oid_to_string(oid), ret, + le32_to_cpu(u.set_c->status)); + + if (ret == 0) { + ret = rndis_error_status(u.set_c->status); + + if (ret < 0) + netdev_dbg(dev->net, "%s(%s): device returned error, 0x%08x (%d)\n", + __func__, oid_to_string(oid), + le32_to_cpu(u.set_c->status), ret); + } + + mutex_unlock(&priv->command_lock); + + if (u.buf != priv->command_buffer) + kfree(u.buf); + return ret; +} + +static int rndis_reset(struct usbnet *usbdev) +{ + struct rndis_wlan_private *priv = get_rndis_wlan_priv(usbdev); + struct rndis_reset *reset; + int ret; + + mutex_lock(&priv->command_lock); + + reset = (void *)priv->command_buffer; + memset(reset, 0, sizeof(*reset)); + reset->msg_type = cpu_to_le32(RNDIS_MSG_RESET); + reset->msg_len = cpu_to_le32(sizeof(*reset)); + priv->current_command_oid = 0; + ret = rndis_command(usbdev, (void *)reset, CONTROL_BUFFER_SIZE); + + mutex_unlock(&priv->command_lock); + + if (ret < 0) + return ret; + return 0; +} + +/* + * Specs say that we can only set config parameters only soon after device + * initialization. + * value_type: 0 = u32, 2 = unicode string + */ +static int rndis_set_config_parameter(struct usbnet *dev, char *param, + int value_type, void *value) +{ + struct ndis_config_param *infobuf; + int value_len, info_len, param_len, ret, i; + __le16 *unibuf; + __le32 *dst_value; + + if (value_type == 0) + value_len = sizeof(__le32); + else if (value_type == 2) + value_len = strlen(value) * sizeof(__le16); + else + return -EINVAL; + + param_len = strlen(param) * sizeof(__le16); + info_len = sizeof(*infobuf) + param_len + value_len; + +#ifdef DEBUG + info_len += 12; +#endif + infobuf = kmalloc(info_len, GFP_KERNEL); + if (!infobuf) + return -ENOMEM; + +#ifdef DEBUG + info_len -= 12; + /* extra 12 bytes are for padding (debug output) */ + memset(infobuf, 0xCC, info_len + 12); +#endif + + if (value_type == 2) + netdev_dbg(dev->net, "setting config parameter: %s, value: %s\n", + param, (u8 *)value); + else + netdev_dbg(dev->net, "setting config parameter: %s, value: %d\n", + param, *(u32 *)value); + + infobuf->name_offs = cpu_to_le32(sizeof(*infobuf)); + infobuf->name_length = cpu_to_le32(param_len); + infobuf->type = cpu_to_le32(value_type); + infobuf->value_offs = cpu_to_le32(sizeof(*infobuf) + param_len); + infobuf->value_length = cpu_to_le32(value_len); + + /* simple string to unicode string conversion */ + unibuf = (void *)infobuf + sizeof(*infobuf); + for (i = 0; i < param_len / sizeof(__le16); i++) + unibuf[i] = cpu_to_le16(param[i]); + + if (value_type == 2) { + unibuf = (void *)infobuf + sizeof(*infobuf) + param_len; + for (i = 0; i < value_len / sizeof(__le16); i++) + unibuf[i] = cpu_to_le16(((u8 *)value)[i]); + } else { + dst_value = (void *)infobuf + sizeof(*infobuf) + param_len; + *dst_value = cpu_to_le32(*(u32 *)value); + } + +#ifdef DEBUG + netdev_dbg(dev->net, "info buffer (len: %d)\n", info_len); + for (i = 0; i < info_len; i += 12) { + u32 *tmp = (u32 *)((u8 *)infobuf + i); + netdev_dbg(dev->net, "%08X:%08X:%08X\n", + cpu_to_be32(tmp[0]), + cpu_to_be32(tmp[1]), + cpu_to_be32(tmp[2])); + } +#endif + + ret = rndis_set_oid(dev, RNDIS_OID_GEN_RNDIS_CONFIG_PARAMETER, + infobuf, info_len); + if (ret != 0) + netdev_dbg(dev->net, "setting rndis config parameter failed, %d\n", + ret); + + kfree(infobuf); + return ret; +} + +static int rndis_set_config_parameter_str(struct usbnet *dev, + char *param, char *value) +{ + return rndis_set_config_parameter(dev, param, 2, value); +} + +/* + * data conversion functions + */ +static int level_to_qual(int level) +{ + int qual = 100 * (level - WL_NOISE) / (WL_SIGMAX - WL_NOISE); + return qual >= 0 ? (qual <= 100 ? qual : 100) : 0; +} + +/* + * common functions + */ +static int set_infra_mode(struct usbnet *usbdev, int mode); +static void restore_keys(struct usbnet *usbdev); +static int rndis_check_bssid_list(struct usbnet *usbdev, u8 *match_bssid, + bool *matched); + +static int rndis_start_bssid_list_scan(struct usbnet *usbdev) +{ + __le32 tmp; + + /* Note: RNDIS_OID_802_11_BSSID_LIST_SCAN clears internal BSS list. */ + tmp = cpu_to_le32(1); + return rndis_set_oid(usbdev, RNDIS_OID_802_11_BSSID_LIST_SCAN, &tmp, + sizeof(tmp)); +} + +static int set_essid(struct usbnet *usbdev, struct ndis_80211_ssid *ssid) +{ + struct rndis_wlan_private *priv = get_rndis_wlan_priv(usbdev); + int ret; + + ret = rndis_set_oid(usbdev, RNDIS_OID_802_11_SSID, + ssid, sizeof(*ssid)); + if (ret < 0) { + netdev_warn(usbdev->net, "setting SSID failed (%08X)\n", ret); + return ret; + } + if (ret == 0) { + priv->radio_on = true; + netdev_dbg(usbdev->net, "%s(): radio_on = true\n", __func__); + } + + return ret; +} + +static int set_bssid(struct usbnet *usbdev, const u8 *bssid) +{ + int ret; + + ret = rndis_set_oid(usbdev, RNDIS_OID_802_11_BSSID, + bssid, ETH_ALEN); + if (ret < 0) { + netdev_warn(usbdev->net, "setting BSSID[%pM] failed (%08X)\n", + bssid, ret); + return ret; + } + + return ret; +} + +static int clear_bssid(struct usbnet *usbdev) +{ + static const u8 broadcast_mac[ETH_ALEN] = { + 0xff, 0xff, 0xff, 0xff, 0xff, 0xff + }; + + return set_bssid(usbdev, broadcast_mac); +} + +static int get_bssid(struct usbnet *usbdev, u8 bssid[ETH_ALEN]) +{ + int ret, len; + + len = ETH_ALEN; + ret = rndis_query_oid(usbdev, RNDIS_OID_802_11_BSSID, + bssid, &len); + + if (ret != 0) + eth_zero_addr(bssid); + + return ret; +} + +static int get_association_info(struct usbnet *usbdev, + struct ndis_80211_assoc_info *info, int len) +{ + return rndis_query_oid(usbdev, + RNDIS_OID_802_11_ASSOCIATION_INFORMATION, + info, &len); +} + +static bool is_associated(struct usbnet *usbdev) +{ + struct rndis_wlan_private *priv = get_rndis_wlan_priv(usbdev); + u8 bssid[ETH_ALEN]; + + if (!priv->radio_on) + return false; + + return (get_bssid(usbdev, bssid) == 0 && !is_zero_ether_addr(bssid)); +} + +static int disassociate(struct usbnet *usbdev, bool reset_ssid) +{ + struct rndis_wlan_private *priv = get_rndis_wlan_priv(usbdev); + struct ndis_80211_ssid ssid; + int i, ret = 0; + + if (priv->radio_on) { + ret = rndis_set_oid(usbdev, + RNDIS_OID_802_11_DISASSOCIATE, + NULL, 0); + if (ret == 0) { + priv->radio_on = false; + netdev_dbg(usbdev->net, "%s(): radio_on = false\n", + __func__); + + if (reset_ssid) + msleep(100); + } + } + + /* disassociate causes radio to be turned off; if reset_ssid + * is given, set random ssid to enable radio */ + if (reset_ssid) { + /* Set device to infrastructure mode so we don't get ad-hoc + * 'media connect' indications with the random ssid. + */ + set_infra_mode(usbdev, NDIS_80211_INFRA_INFRA); + + ssid.length = cpu_to_le32(sizeof(ssid.essid)); + get_random_bytes(&ssid.essid[2], sizeof(ssid.essid)-2); + ssid.essid[0] = 0x1; + ssid.essid[1] = 0xff; + for (i = 2; i < sizeof(ssid.essid); i++) + ssid.essid[i] = 0x1 + (ssid.essid[i] * 0xfe / 0xff); + ret = set_essid(usbdev, &ssid); + } + return ret; +} + +static int set_auth_mode(struct usbnet *usbdev, u32 wpa_version, + enum nl80211_auth_type auth_type, int keymgmt) +{ + struct rndis_wlan_private *priv = get_rndis_wlan_priv(usbdev); + __le32 tmp; + int auth_mode, ret; + + netdev_dbg(usbdev->net, "%s(): wpa_version=0x%x authalg=0x%x keymgmt=0x%x\n", + __func__, wpa_version, auth_type, keymgmt); + + if (wpa_version & NL80211_WPA_VERSION_2) { + if (keymgmt & RNDIS_WLAN_KEY_MGMT_802_1X) + auth_mode = NDIS_80211_AUTH_WPA2; + else + auth_mode = NDIS_80211_AUTH_WPA2_PSK; + } else if (wpa_version & NL80211_WPA_VERSION_1) { + if (keymgmt & RNDIS_WLAN_KEY_MGMT_802_1X) + auth_mode = NDIS_80211_AUTH_WPA; + else if (keymgmt & RNDIS_WLAN_KEY_MGMT_PSK) + auth_mode = NDIS_80211_AUTH_WPA_PSK; + else + auth_mode = NDIS_80211_AUTH_WPA_NONE; + } else if (auth_type == NL80211_AUTHTYPE_SHARED_KEY) + auth_mode = NDIS_80211_AUTH_SHARED; + else if (auth_type == NL80211_AUTHTYPE_OPEN_SYSTEM) + auth_mode = NDIS_80211_AUTH_OPEN; + else if (auth_type == NL80211_AUTHTYPE_AUTOMATIC) + auth_mode = NDIS_80211_AUTH_AUTO_SWITCH; + else + return -ENOTSUPP; + + tmp = cpu_to_le32(auth_mode); + ret = rndis_set_oid(usbdev, + RNDIS_OID_802_11_AUTHENTICATION_MODE, + &tmp, sizeof(tmp)); + if (ret != 0) { + netdev_warn(usbdev->net, "setting auth mode failed (%08X)\n", + ret); + return ret; + } + + priv->wpa_version = wpa_version; + + return 0; +} + +static int set_priv_filter(struct usbnet *usbdev) +{ + struct rndis_wlan_private *priv = get_rndis_wlan_priv(usbdev); + __le32 tmp; + + netdev_dbg(usbdev->net, "%s(): wpa_version=0x%x\n", + __func__, priv->wpa_version); + + if (priv->wpa_version & NL80211_WPA_VERSION_2 || + priv->wpa_version & NL80211_WPA_VERSION_1) + tmp = cpu_to_le32(NDIS_80211_PRIV_8021X_WEP); + else + tmp = cpu_to_le32(NDIS_80211_PRIV_ACCEPT_ALL); + + return rndis_set_oid(usbdev, + RNDIS_OID_802_11_PRIVACY_FILTER, &tmp, + sizeof(tmp)); +} + +static int set_encr_mode(struct usbnet *usbdev, int pairwise, int groupwise) +{ + __le32 tmp; + int encr_mode, ret; + + netdev_dbg(usbdev->net, "%s(): cipher_pair=0x%x cipher_group=0x%x\n", + __func__, pairwise, groupwise); + + if (pairwise & RNDIS_WLAN_ALG_CCMP) + encr_mode = NDIS_80211_ENCR_CCMP_ENABLED; + else if (pairwise & RNDIS_WLAN_ALG_TKIP) + encr_mode = NDIS_80211_ENCR_TKIP_ENABLED; + else if (pairwise & RNDIS_WLAN_ALG_WEP) + encr_mode = NDIS_80211_ENCR_WEP_ENABLED; + else if (groupwise & RNDIS_WLAN_ALG_CCMP) + encr_mode = NDIS_80211_ENCR_CCMP_ENABLED; + else if (groupwise & RNDIS_WLAN_ALG_TKIP) + encr_mode = NDIS_80211_ENCR_TKIP_ENABLED; + else + encr_mode = NDIS_80211_ENCR_DISABLED; + + tmp = cpu_to_le32(encr_mode); + ret = rndis_set_oid(usbdev, |