ctrl_iface.c

WLAN无线网络管理的最新程序

		if (ret < 0 || ret >= end - pos)
			return pos;
		pos += ret;
	}

	ret = os_snprintf(pos, end - pos, "]");
	if (ret < 0 || ret >= end - pos)
		return pos;
	pos += ret;

	return pos;
}


static int wpa_supplicant_ctrl_iface_scan_results(
	struct wpa_supplicant *wpa_s, char *buf, size_t buflen)
{
	char *pos, *end;
	struct wpa_scan_result *res;
	int i, ret;

	if (wpa_s->scan_results == NULL &&
	    wpa_supplicant_get_scan_results(wpa_s) < 0)
		return 0;
	if (wpa_s->scan_results == NULL)
		return 0;

	pos = buf;
	end = buf + buflen;
	ret = os_snprintf(pos, end - pos, "bssid / frequency / signal level / "
			  "flags / ssid\n");
	if (ret < 0 || ret >= end - pos)
		return pos - buf;
	pos += ret;

	for (i = 0; i < wpa_s->num_scan_results; i++) {
		res = &wpa_s->scan_results[i];
		ret = os_snprintf(pos, end - pos, MACSTR "\t%d\t%d\t",
				  MAC2STR(res->bssid), res->freq, res->level);
		if (ret < 0 || ret >= end - pos)
			return pos - buf;
		pos += ret;
		if (res->wpa_ie_len) {
			pos = wpa_supplicant_ie_txt(pos, end, "WPA",
						    res->wpa_ie,
						    res->wpa_ie_len);
		}
		if (res->rsn_ie_len) {
			pos = wpa_supplicant_ie_txt(pos, end, "WPA2",
						    res->rsn_ie,
						    res->rsn_ie_len);
		}
		if (!res->wpa_ie_len && !res->rsn_ie_len &&
		    res->caps & IEEE80211_CAP_PRIVACY) {
			ret = os_snprintf(pos, end - pos, "[WEP]");
			if (ret < 0 || ret >= end - pos)
				return pos - buf;
			pos += ret;
		}
		if (res->caps & IEEE80211_CAP_IBSS) {
			ret = os_snprintf(pos, end - pos, "[IBSS]");
			if (ret < 0 || ret >= end - pos)
				return pos - buf;
			pos += ret;
		}

		ret = os_snprintf(pos, end - pos, "\t%s",
				  wpa_ssid_txt(res->ssid, res->ssid_len));
		if (ret < 0 || ret >= end - pos)
			return pos - buf;
		pos += ret;

		ret = os_snprintf(pos, end - pos, "\n");
		if (ret < 0 || ret >= end - pos)
			return pos - buf;
		pos += ret;
	}

	return pos - buf;
}


static int wpa_supplicant_ctrl_iface_select_network(
	struct wpa_supplicant *wpa_s, char *cmd)
{
	int id;
	struct wpa_ssid *ssid;

	/* cmd: "<network id>" or "any" */
	if (os_strcmp(cmd, "any") == 0) {
		wpa_printf(MSG_DEBUG, "CTRL_IFACE: SELECT_NETWORK any");
		ssid = wpa_s->conf->ssid;
		while (ssid) {
			ssid->disabled = 0;
			ssid = ssid->next;
		}
		wpa_s->reassociate = 1;
		wpa_supplicant_req_scan(wpa_s, 0, 0);
		return 0;
	}

	id = atoi(cmd);
	wpa_printf(MSG_DEBUG, "CTRL_IFACE: SELECT_NETWORK id=%d", id);

	ssid = wpa_config_get_network(wpa_s->conf, id);
	if (ssid == NULL) {
		wpa_printf(MSG_DEBUG, "CTRL_IFACE: Could not find network "
			   "id=%d", id);
		return -1;
	}

	if (ssid != wpa_s->current_ssid && wpa_s->current_ssid)
		wpa_supplicant_disassociate(wpa_s, REASON_DEAUTH_LEAVING);

	/* Mark all other networks disabled and trigger reassociation */
	ssid = wpa_s->conf->ssid;
	while (ssid) {
		ssid->disabled = id != ssid->id;
		ssid = ssid->next;
	}
	wpa_s->reassociate = 1;
	wpa_supplicant_req_scan(wpa_s, 0, 0);

	return 0;
}


static int wpa_supplicant_ctrl_iface_enable_network(
	struct wpa_supplicant *wpa_s, char *cmd)
{
	int id;
	struct wpa_ssid *ssid;

	/* cmd: "<network id>" */
	id = atoi(cmd);
	wpa_printf(MSG_DEBUG, "CTRL_IFACE: ENABLE_NETWORK id=%d", id);

	ssid = wpa_config_get_network(wpa_s->conf, id);
	if (ssid == NULL) {
		wpa_printf(MSG_DEBUG, "CTRL_IFACE: Could not find network "
			   "id=%d", id);
		return -1;
	}

	if (wpa_s->current_ssid == NULL && ssid->disabled) {
		/*
		 * Try to reassociate since there is no current configuration
		 * and a new network was made available. */
		wpa_s->reassociate = 1;
		wpa_supplicant_req_scan(wpa_s, 0, 0);
	}
	ssid->disabled = 0;

	return 0;
}


static int wpa_supplicant_ctrl_iface_disable_network(
	struct wpa_supplicant *wpa_s, char *cmd)
{
	int id;
	struct wpa_ssid *ssid;

	/* cmd: "<network id>" */
	id = atoi(cmd);
	wpa_printf(MSG_DEBUG, "CTRL_IFACE: DISABLE_NETWORK id=%d", id);

	ssid = wpa_config_get_network(wpa_s->conf, id);
	if (ssid == NULL) {
		wpa_printf(MSG_DEBUG, "CTRL_IFACE: Could not find network "
			   "id=%d", id);
		return -1;
	}

	if (ssid == wpa_s->current_ssid)
		wpa_supplicant_disassociate(wpa_s, REASON_DEAUTH_LEAVING);
	ssid->disabled = 1;

	return 0;
}


static int wpa_supplicant_ctrl_iface_add_network(
	struct wpa_supplicant *wpa_s, char *buf, size_t buflen)
{
	struct wpa_ssid *ssid;
	int ret;

	wpa_printf(MSG_DEBUG, "CTRL_IFACE: ADD_NETWORK");

	ssid = wpa_config_add_network(wpa_s->conf);
	if (ssid == NULL)
		return -1;
	ssid->disabled = 1;
	wpa_config_set_network_defaults(ssid);

	ret = os_snprintf(buf, buflen, "%d\n", ssid->id);
	if (ret < 0 || (size_t) ret >= buflen)
		return -1;
	return ret;
}


static int wpa_supplicant_ctrl_iface_remove_network(
	struct wpa_supplicant *wpa_s, char *cmd)
{
	int id;
	struct wpa_ssid *ssid;

	/* cmd: "<network id>" */
	id = atoi(cmd);
	wpa_printf(MSG_DEBUG, "CTRL_IFACE: REMOVE_NETWORK id=%d", id);

	ssid = wpa_config_get_network(wpa_s->conf, id);
	if (ssid == NULL ||
	    wpa_config_remove_network(wpa_s->conf, id) < 0) {
		wpa_printf(MSG_DEBUG, "CTRL_IFACE: Could not find network "
			   "id=%d", id);
		return -1;
	}

	if (ssid == wpa_s->current_ssid) {
		/*
		 * Invalidate the EAP session cache if the current network is
		 * removed.
		 */
		eapol_sm_invalidate_cached_session(wpa_s->eapol);

		wpa_supplicant_disassociate(wpa_s, REASON_DEAUTH_LEAVING);
	}

	return 0;
}


static int wpa_supplicant_ctrl_iface_set_network(
	struct wpa_supplicant *wpa_s, char *cmd)
{
	int id;
	struct wpa_ssid *ssid;
	char *name, *value;

	/* cmd: "<network id> <variable name> <value>" */
	name = os_strchr(cmd, ' ');
	if (name == NULL)
		return -1;
	*name++ = '\0';

	value = os_strchr(name, ' ');
	if (value == NULL)
		return -1;
	*value++ = '\0';

	id = atoi(cmd);
	wpa_printf(MSG_DEBUG, "CTRL_IFACE: SET_NETWORK id=%d name='%s'",
		   id, name);
	wpa_hexdump_ascii_key(MSG_DEBUG, "CTRL_IFACE: value",
			      (u8 *) value, os_strlen(value));

	ssid = wpa_config_get_network(wpa_s->conf, id);
	if (ssid == NULL) {
		wpa_printf(MSG_DEBUG, "CTRL_IFACE: Could not find network "
			   "id=%d", id);
		return -1;
	}

	if (wpa_config_set(ssid, name, value, 0) < 0) {
		wpa_printf(MSG_DEBUG, "CTRL_IFACE: Failed to set network "
			   "variable '%s'", name);
		return -1;
	}

	if (wpa_s->current_ssid == ssid) {
		/*
		 * Invalidate the EAP session cache if anything in the current
		 * configuration changes.
		 */
		eapol_sm_invalidate_cached_session(wpa_s->eapol);
	}

	if ((os_strcmp(name, "psk") == 0 &&
	     value[0] == '"' && ssid->ssid_len) ||
	    (os_strcmp(name, "ssid") == 0 && ssid->passphrase))
		wpa_config_update_psk(ssid);

	return 0;
}


static int wpa_supplicant_ctrl_iface_get_network(
	struct wpa_supplicant *wpa_s, char *cmd, char *buf, size_t buflen)
{
	int id;
	struct wpa_ssid *ssid;
	char *name, *value;

	/* cmd: "<network id> <variable name>" */
	name = os_strchr(cmd, ' ');
	if (name == NULL || buflen == 0)
		return -1;
	*name++ = '\0';

	id = atoi(cmd);
	wpa_printf(MSG_DEBUG, "CTRL_IFACE: GET_NETWORK id=%d name='%s'",
		   id, name);

	ssid = wpa_config_get_network(wpa_s->conf, id);
	if (ssid == NULL) {
		wpa_printf(MSG_DEBUG, "CTRL_IFACE: Could not find network "
			   "id=%d", id);
		return -1;
	}

	value = wpa_config_get_no_key(ssid, name);
	if (value == NULL) {
		wpa_printf(MSG_DEBUG, "CTRL_IFACE: Failed to get network "
			   "variable '%s'", name);
		return -1;
	}

	os_snprintf(buf, buflen, "%s", value);
	buf[buflen - 1] = '\0';

	os_free(value);

	return os_strlen(buf);
}


static int wpa_supplicant_ctrl_iface_save_config(struct wpa_supplicant *wpa_s)
{
	int ret;

	if (!wpa_s->conf->update_config) {
		wpa_printf(MSG_DEBUG, "CTRL_IFACE: SAVE_CONFIG - Not allowed "
			   "to update configuration (update_config=0)");
		return -1;
	}

	ret = wpa_config_write(wpa_s->confname, wpa_s->conf);
	if (ret) {
		wpa_printf(MSG_DEBUG, "CTRL_IFACE: SAVE_CONFIG - Failed to "
			   "update configuration");
	} else {
		wpa_printf(MSG_DEBUG, "CTRL_IFACE: SAVE_CONFIG - Configuration"
			   " updated");
	}

	return ret;
}


static int wpa_supplicant_ctrl_iface_get_capability(
	struct wpa_supplicant *wpa_s, const char *_field, char *buf,
	size_t buflen)
{
	struct wpa_driver_capa capa;
	int res, first = 1, ret;
	char *pos, *end, *strict;
	char field[30];

	/* Determine whether or not strict checking was requested */
	os_snprintf(field, sizeof(field), "%s", _field);
	field[sizeof(field) - 1] = '\0';
	strict = os_strchr(field, ' ');
	if (strict != NULL) {
		*strict++ = '\0';
		if (os_strcmp(strict, "strict") != 0)
			return -1;
	}

	wpa_printf(MSG_DEBUG, "CTRL_IFACE: GET_CAPABILITY '%s' %s",
		field, strict ? strict : "");

	if (os_strcmp(field, "eap") == 0) {
		return eap_get_names(buf, buflen);
	}

	res = wpa_drv_get_capa(wpa_s, &capa);

	pos = buf;
	end = pos + buflen;

	if (os_strcmp(field, "pairwise") == 0) {
		if (res < 0) {
			if (strict)
				return 0;
			ret = os_snprintf(buf, buflen, "CCMP TKIP NONE");
			if (ret < 0 || (size_t) ret >= buflen)
				return -1;
			return ret;
		}

		if (capa.enc & WPA_DRIVER_CAPA_ENC_CCMP) {
			ret = os_snprintf(pos, end - pos, "%sCCMP",
					  first ? "" : " ");
			if (ret < 0 || ret >= end - pos)
				return pos - buf;
			pos += ret;
			first = 0;
		}

		if (capa.enc & WPA_DRIVER_CAPA_ENC_TKIP) {
			ret = os_snprintf(pos, end - pos, "%sTKIP",
					  first ? "" : " ");
			if (ret < 0 || ret >= end - pos)
				return pos - buf;
			pos += ret;
			first = 0;
		}

		if (capa.key_mgmt & WPA_DRIVER_CAPA_KEY_MGMT_WPA_NONE) {
			ret = os_snprintf(pos, end - pos, "%sNONE",
					  first ? "" : " ");
			if (ret < 0 || ret >= end - pos)
				return pos - buf;
			pos += ret;
			first = 0;
		}

		return pos - buf;
	}

	if (os_strcmp(field, "group") == 0) {
		if (res < 0) {
			if (strict)
				return 0;
			ret = os_snprintf(buf, buflen,
					  "CCMP TKIP WEP104 WEP40");
			if (ret < 0 || (size_t) ret >= buflen)
				return -1;
			return ret;
		}

		if (capa.enc & WPA_DRIVER_CAPA_ENC_CCMP) {
			ret = os_snprintf(pos, end - pos, "%sCCMP",
					  first ? "" : " ");
			if (ret < 0 || ret >= end - pos)
				return pos - buf;
			pos += ret;
			first = 0;
		}

		if (capa.enc & WPA_DRIVER_CAPA_ENC_TKIP) {
			ret = os_snprintf(pos, end - pos, "%sTKIP",
					  first ? "" : " ");
			if (ret < 0 || ret >= end - pos)
				return pos - buf;
			pos += ret;
			first = 0;
		}

		if (capa.enc & WPA_DRIVER_CAPA_ENC_WEP104) {
			ret = os_snprintf(pos, end - pos, "%sWEP104",
					  first ? "" : " ");
			if (ret < 0 || ret >= end - pos)
				return pos - buf;
			pos += ret;
			first = 0;