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二、wpa_supplicant 初始化的关键函数
- struct wpa_global * wpa_supplicant_init(struct wpa_params *params)
- struct wpa_supplicant * wpa_supplicant_add_iface(struct wpa_global *global,struct wpa_interface *iface)
1. wpa_supplicant_init()
/** * wpa_supplicant_init - Initialize %wpa_supplicant * @params: Parameters for %wpa_supplicant * Returns: Pointer to global %wpa_supplicant data, or %NULL on failure * * This function is used to initialize %wpa_supplicant. After successful * initialization, the returned data pointer can be used to add and remove * network interfaces, and eventually, to deinitialize %wpa_supplicant. */struct wpa_global * wpa_supplicant_init(struct wpa_params *params){ struct wpa_global *global; int ret, i; if (params == NULL) return NULL;#ifdef CONFIG_DRIVER_NDIS { void driver_ndis_init_ops(void); driver_ndis_init_ops(); }#endif /* CONFIG_DRIVER_NDIS */#ifndef CONFIG_NO_WPA_MSG wpa_msg_register_ifname_cb(wpa_supplicant_msg_ifname_cb);#endif /* CONFIG_NO_WPA_MSG */ wpa_debug_open_file(params->wpa_debug_file_path); if (params->wpa_debug_syslog) wpa_debug_open_syslog(); if (params->wpa_debug_tracing) { ret = wpa_debug_open_linux_tracing(); if (ret) { wpa_printf(MSG_ERROR, "Failed to enable trace logging"); return NULL; } } ret = eap_register_methods(); if (ret) { wpa_printf(MSG_ERROR, "Failed to register EAP methods"); if (ret == -2) wpa_printf(MSG_ERROR, "Two or more EAP methods used " "the same EAP type."); return NULL; } global = os_zalloc(sizeof(*global)); if (global == NULL) return NULL; dl_list_init(&global->p2p_srv_bonjour); dl_list_init(&global->p2p_srv_upnp); global->params.daemonize = params->daemonize; global->params.wait_for_monitor = params->wait_for_monitor; global->params.dbus_ctrl_interface = params->dbus_ctrl_interface; if (params->pid_file) global->params.pid_file = os_strdup(params->pid_file); if (params->ctrl_interface) global->params.ctrl_interface = os_strdup(params->ctrl_interface); if (params->override_driver) global->params.override_driver = os_strdup(params->override_driver); if (params->override_ctrl_interface) global->params.override_ctrl_interface = os_strdup(params->override_ctrl_interface); wpa_debug_level = global->params.wpa_debug_level = params->wpa_debug_level; wpa_debug_show_keys = global->params.wpa_debug_show_keys = params->wpa_debug_show_keys; wpa_debug_timestamp = global->params.wpa_debug_timestamp = params->wpa_debug_timestamp; wpa_printf(MSG_DEBUG, "wpa_supplicant v" VERSION_STR); if (eloop_init()) { wpa_printf(MSG_ERROR, "Failed to initialize event loop"); wpa_supplicant_deinit(global); return NULL; } random_init(params->entropy_file); global->ctrl_iface = wpa_supplicant_global_ctrl_iface_init(global); if (global->ctrl_iface == NULL) { wpa_supplicant_deinit(global); return NULL; } if (wpas_notify_supplicant_initialized(global)) { wpa_supplicant_deinit(global); return NULL; } for (i = 0; wpa_drivers[i]; i++) global->drv_count++; if (global->drv_count == 0) { wpa_printf(MSG_ERROR, "No drivers enabled"); wpa_supplicant_deinit(global); return NULL; } global->drv_priv = os_zalloc(global->drv_count * sizeof(void *)); if (global->drv_priv == NULL) { wpa_supplicant_deinit(global); return NULL; }#ifdef CONFIG_WIFI_DISPLAY if (wifi_display_init(global) < 0) { wpa_printf(MSG_ERROR, "Failed to initialize Wi-Fi Display"); wpa_supplicant_deinit(global); return NULL; }#endif /* CONFIG_WIFI_DISPLAY */ return global;}
2. wpa_supplicant_add_iface()
在结构体wpa_interface 的注释中提到,wpa_interface将作为此函数的参数。
/** * struct wpa_interface - Parameters for wpa_supplicant_add_iface() *
/ struct wpa_interface { …… }
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