android wifi-wpa_supplicant_源码分析（三）

三、wpa_driver_ops内部定义很多函数指针，通过这些定义的函数指针，WPAS能隔离上层使用者和具体的driver。
    const struct wpa_driver_ops wpa_driver_nl80211_ops = {
        .name = "nl80211",        //driver wrapper的名称
        .desc = "Linux nl80211/cfg80211",    //描述信息
        .get_bssid = wpa_driver_nl80211_get_bssid,    //用于获取 bssid
        .get_ssid = wpa_driver_nl80211_get_ssid,
        .set_key = driver_nl80211_set_key,
        .scan2 = driver_nl80211_scan2,    //扫描函数
        .sched_scan = wpa_driver_nl80211_sched_scan,
        .stop_sched_scan = wpa_driver_nl80211_stop_sched_scan,
        .get_scan_results2 = wpa_driver_nl80211_get_scan_results,    //获取扫描结果
        .deauthenticate = driver_nl80211_deauthenticate,
        .authenticate = driver_nl80211_authenticate,    //触发 authentication 操作
        .associate = wpa_driver_nl80211_associate,    //触发 association 操作
        .global_init = nl80211_global_init,    //driver wrapper 全局初始化函数，该函数的返回值保存在 wpa_global 成员变量 drv_pri 数组中
        .global_deinit = nl80211_global_deinit,
        .init2 = wpa_driver_nl80211_init,    //driver wrapper 初始化函数
        .deinit = driver_nl80211_deinit,
        .get_capa = wpa_driver_nl80211_get_capa,
        .set_operstate = wpa_driver_nl80211_set_operstate,
        .set_supp_port = wpa_driver_nl80211_set_supp_port,
        .set_country = wpa_driver_nl80211_set_country,
        .get_country = wpa_driver_nl80211_get_country,
        .set_ap = wpa_driver_nl80211_set_ap,
        .set_acl = wpa_driver_nl80211_set_acl,
        .if_add = wpa_driver_nl80211_if_add,
        .if_remove = driver_nl80211_if_remove,
        .send_mlme = driver_nl80211_send_mlme,
        .get_hw_feature_data = wpa_driver_nl80211_get_hw_feature_data,
        .sta_add = wpa_driver_nl80211_sta_add,
        .sta_remove = driver_nl80211_sta_remove,
        .hapd_send_eapol = wpa_driver_nl80211_hapd_send_eapol,
        .sta_set_flags = wpa_driver_nl80211_sta_set_flags,
        .hapd_init = i802_init,
        .hapd_deinit = i802_deinit,
        .set_wds_sta = i802_set_wds_sta,
        .get_seqnum = i802_get_seqnum,
        .flush = i802_flush,
        .get_inact_sec = i802_get_inact_sec,
        .sta_clear_stats = i802_sta_clear_stats,
        .set_rts = i802_set_rts,
        .set_frag = i802_set_frag,
        .set_tx_queue_params = i802_set_tx_queue_params,
        .set_sta_vlan = driver_nl80211_set_sta_vlan,
        .sta_deauth = i802_sta_deauth,
        .sta_disassoc = i802_sta_disassoc,
        .read_sta_data = driver_nl80211_read_sta_data,
        .set_freq = i802_set_freq,
        .send_action = driver_nl80211_send_action,
        .send_action_cancel_wait = wpa_driver_nl80211_send_action_cancel_wait,
        .remain_on_channel = wpa_driver_nl80211_remain_on_channel,
        .cancel_remain_on_channel =    wpa_driver_nl80211_cancel_remain_on_channel,
        .probe_req_report = driver_nl80211_probe_req_report,
        .deinit_ap = wpa_driver_nl80211_deinit_ap,
        .deinit_p2p_cli = wpa_driver_nl80211_deinit_p2p_cli,
        .resume = wpa_driver_nl80211_resume,
        .send_ft_action = nl80211_send_ft_action,
        .signal_monitor = nl80211_signal_monitor,
        .signal_poll = nl80211_signal_poll,
        .send_frame = nl80211_send_frame,
        .shared_freq = wpa_driver_nl80211_shared_freq,
        .set_param = nl80211_set_param,
        .get_radio_name = nl80211_get_radio_name,
        .add_pmkid = nl80211_add_pmkid,
        .remove_pmkid = nl80211_remove_pmkid,
        .flush_pmkid = nl80211_flush_pmkid,
        .set_rekey_info = nl80211_set_rekey_info,
        .poll_client = nl80211_poll_client,
        .set_p2p_powersave = nl80211_set_p2p_powersave,
        .start_dfs_cac = nl80211_start_radar_detection,
        .stop_ap = wpa_driver_nl80211_stop_ap,
    #ifdef CONFIG_TDLS
        .send_tdls_mgmt = nl80211_send_tdls_mgmt,
        .tdls_oper = nl80211_tdls_oper,
    #endif /* CONFIG_TDLS */
        .update_ft_ies = wpa_driver_nl80211_update_ft_ies,
        .get_mac_addr = wpa_driver_nl80211_get_macaddr,
        .get_survey = wpa_driver_nl80211_get_survey,
        .status = wpa_driver_nl80211_status,
        .switch_channel = nl80211_switch_channel,
    #ifdef ANDROID_P2P
        .set_noa = wpa_driver_set_p2p_noa,
        .get_noa = wpa_driver_get_p2p_noa,
        .set_ap_wps_ie = wpa_driver_set_ap_wps_p2p_ie,
    #endif /* ANDROID_P2P */
    #ifdef ANDROID
        .driver_cmd = wpa_driver_nl80211_driver_cmd,    //用于处理和具体驱动相关的命令
    #endif /* ANDROID */
        .vendor_cmd = nl80211_vendor_cmd,
        .set_qos_map = nl80211_set_qos_map,
        .set_wowlan = nl80211_set_wowlan,
        .roaming = nl80211_roaming,
        .set_mac_addr = nl80211_set_mac_addr,
    };