driver_prism54.c - platform/external/wpa_supplicant - Git at Google

 /*
  * WPA Supplicant - driver interaction with Linux Prism54.org driver
  * Copyright (c) 2003-2005, Jouni Malinen <j@w1.fi>
  * Copyright (c) 2004, Luis R. Rodriguez <mcgrof@ruslug.rutgers.edu>
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 2 as
  * published by the Free Software Foundation.
  *
  * Alternatively, this software may be distributed under the terms of BSD
  * license.
  *
  * See README and COPYING for more details.
  */

 #include "includes.h"
 #include <sys/ioctl.h>

 #include "wireless_copy.h"
 #include "common.h"
 #include "driver.h"
 #include "driver_wext.h"
 #include "driver_hostap.h"
 #include "l2_packet.h"
 #include "wpa_supplicant.h"

 struct wpa_driver_prism54_data {
 	void *wext; /* private data for driver_wext */
 	void *ctx;
 	char ifname[IFNAMSIZ + 1];
 	int sock;
 };

 #define PRISM54_SET_WPA    		SIOCIWFIRSTPRIV+12
 #define PRISM54_HOSTAPD    		SIOCIWFIRSTPRIV+25
 #define PRISM54_DROP_UNENCRYPTED	SIOCIWFIRSTPRIV+26

 static void show_set_key_error(struct prism2_hostapd_param *);

 static int hostapd_ioctl_prism54(struct wpa_driver_prism54_data *drv,
 				 struct prism2_hostapd_param *param,
 				 int len, int show_err)
 {
 	struct iwreq iwr;

 	os_memset(&iwr, 0, sizeof(iwr));
 	os_strncpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
 	iwr.u.data.pointer = (caddr_t) param;
 	iwr.u.data.length = len;

 	if (ioctl(drv->sock, PRISM54_HOSTAPD, &iwr) < 0) {
 		int ret = errno;
 		if (show_err)
 			perror("ioctl[PRISM54_HOSTAPD]");
 		return ret;
 	}

 	return 0;
 }


 static int wpa_driver_prism54_set_wpa_ie(struct wpa_driver_prism54_data *drv,
 					 const u8 *wpa_ie,
 					 size_t wpa_ie_len)
 {
 	struct prism2_hostapd_param *param;
 	int res;
 	size_t blen = PRISM2_HOSTAPD_GENERIC_ELEMENT_HDR_LEN + wpa_ie_len;
 	if (blen < sizeof(*param))
 		blen = sizeof(*param);

 	param = os_zalloc(blen);
 	if (param == NULL)
 		return -1;

 	param->cmd = PRISM2_HOSTAPD_SET_GENERIC_ELEMENT;
 	param->u.generic_elem.len = wpa_ie_len;
 	os_memcpy(param->u.generic_elem.data, wpa_ie, wpa_ie_len);
 	res = hostapd_ioctl_prism54(drv, param, blen, 1);

 	os_free(param);

 	return res;
 }


 /* This is called at wpa_supplicant daemon init time */
 static int wpa_driver_prism54_set_wpa(void *priv, int enabled)
 {
 	struct wpa_driver_prism54_data *drv = priv;
 	struct prism2_hostapd_param *param;
 	int res;
 	size_t blen = PRISM2_HOSTAPD_GENERIC_ELEMENT_HDR_LEN;
 	if (blen < sizeof(*param))
 		blen = sizeof(*param);

 	param = os_zalloc(blen);
 	if (param == NULL)
 		return -1;

 	param->cmd = PRISM54_SET_WPA;
 	param->u.generic_elem.len = 0;
 	res = hostapd_ioctl_prism54(drv, param, blen, 1);

 	os_free(param);

 	return res;
 }


 static int wpa_driver_prism54_set_key(void *priv, wpa_alg alg,
 				      const u8 *addr, int key_idx, int set_tx,
 				      const u8 *seq, size_t seq_len,
 				      const u8 *key, size_t key_len)
 {
 	struct wpa_driver_prism54_data *drv = priv;
 	struct prism2_hostapd_param *param;
 	u8 *buf;
 	size_t blen;
 	int ret = 0;
 	char *alg_name;

 	switch (alg) {
 	case WPA_ALG_NONE:
 		alg_name = "none";
 		return -1;
 		break;
 	case WPA_ALG_WEP:
 		alg_name = "WEP";
 		return -1;
 		break;
 	case WPA_ALG_TKIP:
 		alg_name = "TKIP";
 		break;
 	case WPA_ALG_CCMP:
 		alg_name = "CCMP";
 		return -1;
 		break;
 	default:
 		return -1;
 	}

 	wpa_printf(MSG_DEBUG, "%s: alg=%s key_idx=%d set_tx=%d seq_len=%lu "
 		   "key_len=%lu", __FUNCTION__, alg_name, key_idx, set_tx,
 		   (unsigned long) seq_len, (unsigned long) key_len);

 	if (seq_len > 8)
 		return -2;

 	blen = sizeof(*param) + key_len;
 	buf = os_zalloc(blen);
 	if (buf == NULL)
 		return -1;

 	param = (struct prism2_hostapd_param *) buf;
 	param->cmd = PRISM2_SET_ENCRYPTION;
 	/* TODO: In theory, STA in client mode can use five keys; four default
 	 * keys for receiving (with keyidx 0..3) and one individual key for
 	 * both transmitting and receiving (keyidx 0) _unicast_ packets. Now,
 	 * keyidx 0 is reserved for this unicast use and default keys can only
 	 * use keyidx 1..3 (i.e., default key with keyidx 0 is not supported).
 	 * This should be fine for more or less all cases, but for completeness
 	 * sake, the driver could be enhanced to support the missing key. */
 #if 0
 	if (addr == NULL)
 		os_memset(param->sta_addr, 0xff, ETH_ALEN);
 	else
 		os_memcpy(param->sta_addr, addr, ETH_ALEN);
 #else
 	os_memset(param->sta_addr, 0xff, ETH_ALEN);
 #endif
 	os_strncpy((char *) param->u.crypt.alg, alg_name,
 		   HOSTAP_CRYPT_ALG_NAME_LEN);
 	param->u.crypt.flags = set_tx ? HOSTAP_CRYPT_FLAG_SET_TX_KEY : 0;
 	param->u.crypt.idx = key_idx;
 	os_memcpy(param->u.crypt.seq, seq, seq_len);
 	param->u.crypt.key_len = key_len;
 	os_memcpy((u8 *) (param + 1), key, key_len);

 	if (hostapd_ioctl_prism54(drv, param, blen, 1)) {
 		wpa_printf(MSG_WARNING, "Failed to set encryption.");
 		show_set_key_error(param);
 		ret = -1;
 	}
 	os_free(buf);

 	return ret;
 }


 static int wpa_driver_prism54_set_countermeasures(void *priv,
 						 int enabled)
 {
 	/* FIX */
 	printf("wpa_driver_prism54_set_countermeasures - not yet "
 	       "implemented\n");
 	return 0;
 }


 static int wpa_driver_prism54_set_drop_unencrypted(void *priv,
 						  int enabled)
 {
 	struct wpa_driver_prism54_data *drv = priv;
 	struct prism2_hostapd_param *param;
 	int res;
 	size_t blen = PRISM2_HOSTAPD_GENERIC_ELEMENT_HDR_LEN;
 	if (blen < sizeof(*param))
 		blen = sizeof(*param);

 	param = os_zalloc(blen);
 	if (param == NULL)
 		return -1;

 	param->cmd = PRISM54_DROP_UNENCRYPTED;
 	param->u.generic_elem.len = 0;
 	res = hostapd_ioctl_prism54(drv, param, blen, 1);

 	os_free(param);

 	return res;
 }


 static int wpa_driver_prism54_deauthenticate(void *priv, const u8 *addr,
 					     int reason_code)
 {
 	/* FIX */
 	printf("wpa_driver_prism54_deauthenticate - not yet implemented\n");
 	return 0;
 }


 static int wpa_driver_prism54_disassociate(void *priv, const u8 *addr,
 					   int reason_code)
 {
 	/* FIX */
 	printf("wpa_driver_prism54_disassociate - not yet implemented\n");
 	return 0;
 }


 static int
 wpa_driver_prism54_associate(void *priv,
 			     struct wpa_driver_associate_params *params)
 {
 	struct wpa_driver_prism54_data *drv = priv;
 	int ret = 0;

 	if (wpa_driver_prism54_set_wpa_ie(drv, params->wpa_ie,
 					  params->wpa_ie_len) < 0)
 		ret = -1;
 	if (wpa_driver_wext_set_freq(drv->wext, params->freq) < 0)
 		ret = -1;
 	if (wpa_driver_wext_set_ssid(drv->wext, params->ssid,
 				     params->ssid_len) < 0)
 		ret = -1;
 	if (wpa_driver_wext_set_bssid(drv->wext, params->bssid) < 0)
 		ret = -1;

 	return ret;
 }

 static void show_set_key_error(struct prism2_hostapd_param *param)
 {
 	switch (param->u.crypt.err) {
 	case HOSTAP_CRYPT_ERR_UNKNOWN_ALG:
 		wpa_printf(MSG_INFO, "Unknown algorithm '%s'.",
 			   param->u.crypt.alg);
 		wpa_printf(MSG_INFO, "You may need to load kernel module to "
 			   "register that algorithm.");
 		wpa_printf(MSG_INFO, "E.g., 'modprobe hostap_crypt_wep' for "
 			   "WEP.");
 		break;
 	case HOSTAP_CRYPT_ERR_UNKNOWN_ADDR:
 		wpa_printf(MSG_INFO, "Unknown address " MACSTR ".",
 			   MAC2STR(param->sta_addr));
 		break;
 	case HOSTAP_CRYPT_ERR_CRYPT_INIT_FAILED:
 		wpa_printf(MSG_INFO, "Crypt algorithm initialization failed.");
 		break;
 	case HOSTAP_CRYPT_ERR_KEY_SET_FAILED:
 		wpa_printf(MSG_INFO, "Key setting failed.");
 		break;
 	case HOSTAP_CRYPT_ERR_TX_KEY_SET_FAILED:
 		wpa_printf(MSG_INFO, "TX key index setting failed.");
 		break;
 	case HOSTAP_CRYPT_ERR_CARD_CONF_FAILED:
 		wpa_printf(MSG_INFO, "Card configuration failed.");
 		break;
 	}
 }


 static int wpa_driver_prism54_get_bssid(void *priv, u8 *bssid)
 {
 	struct wpa_driver_prism54_data *drv = priv;
 	return wpa_driver_wext_get_bssid(drv->wext, bssid);
 }


 static int wpa_driver_prism54_get_ssid(void *priv, u8 *ssid)
 {
 	struct wpa_driver_prism54_data *drv = priv;
 	return wpa_driver_wext_get_ssid(drv->wext, ssid);
 }


 static int wpa_driver_prism54_scan(void *priv, const u8 *ssid, size_t ssid_len)
 {
 	struct wpa_driver_prism54_data *drv = priv;
 	return wpa_driver_wext_scan(drv->wext, ssid, ssid_len);
 }


 static int wpa_driver_prism54_get_scan_results(void *priv,
 					    struct wpa_scan_result *results,
 					    size_t max_size)
 {
 	struct wpa_driver_prism54_data *drv = priv;
 	return wpa_driver_wext_get_scan_results(drv->wext, results, max_size);
 }


 static int wpa_driver_prism54_set_operstate(void *priv, int state)
 {
 	struct wpa_driver_prism54_data *drv = priv;
 	return wpa_driver_wext_set_operstate(drv->wext, state);
 }


 static void * wpa_driver_prism54_init(void *ctx, const char *ifname)
 {
 	struct wpa_driver_prism54_data *drv;

 	drv = os_zalloc(sizeof(*drv));
 	if (drv == NULL)
 		return NULL;
 	drv->wext = wpa_driver_wext_init(ctx, ifname);
 	if (drv->wext == NULL) {
 		os_free(drv);
 		return NULL;
 	}

 	drv->ctx = ctx;
 	os_strncpy(drv->ifname, ifname, sizeof(drv->ifname));
 	drv->sock = socket(PF_INET, SOCK_DGRAM, 0);
 	if (drv->sock < 0) {
 		wpa_driver_wext_deinit(drv->wext);
 		os_free(drv);
 		return NULL;
 	}

 	return drv;
 }


 static void wpa_driver_prism54_deinit(void *priv)
 {
 	struct wpa_driver_prism54_data *drv = priv;
 	wpa_driver_wext_deinit(drv->wext);
 	close(drv->sock);
 	os_free(drv);
 }


 const struct wpa_driver_ops wpa_driver_prism54_ops = {
 	.name = "prism54",
 	.desc = "Prism54.org driver (Intersil Prism GT/Duette/Indigo)",
 	.get_bssid = wpa_driver_prism54_get_bssid,
 	.get_ssid = wpa_driver_prism54_get_ssid,
 	.set_wpa = wpa_driver_prism54_set_wpa,
 	.set_key = wpa_driver_prism54_set_key,
 	.set_countermeasures = wpa_driver_prism54_set_countermeasures,
 	.set_drop_unencrypted = wpa_driver_prism54_set_drop_unencrypted,
 	.scan = wpa_driver_prism54_scan,
 	.get_scan_results = wpa_driver_prism54_get_scan_results,
 	.deauthenticate = wpa_driver_prism54_deauthenticate,
 	.disassociate = wpa_driver_prism54_disassociate,
 	.associate = wpa_driver_prism54_associate,
 	.init = wpa_driver_prism54_init,
 	.deinit = wpa_driver_prism54_deinit,
 	.set_operstate = wpa_driver_prism54_set_operstate,
 };
	/*
	* WPA Supplicant - driver interaction with Linux Prism54.org driver
	* Copyright (c) 2003-2005, Jouni Malinen <j@w1.fi>
	* Copyright (c) 2004, Luis R. Rodriguez <mcgrof@ruslug.rutgers.edu>
	*
	* This program is free software; you can redistribute it and/or modify
	* it under the terms of the GNU General Public License version 2 as
	* published by the Free Software Foundation.
	*
	* Alternatively, this software may be distributed under the terms of BSD
	* license.
	*
	* See README and COPYING for more details.
	*/

	#include "includes.h"
	#include <sys/ioctl.h>

	#include "wireless_copy.h"
	#include "common.h"
	#include "driver.h"
	#include "driver_wext.h"
	#include "driver_hostap.h"
	#include "l2_packet.h"
	#include "wpa_supplicant.h"

	struct wpa_driver_prism54_data {
	void wext; / private data for driver_wext */
	void *ctx;
	char ifname[IFNAMSIZ + 1];
	int sock;
	};

	#define PRISM54_SET_WPA SIOCIWFIRSTPRIV+12
	#define PRISM54_HOSTAPD SIOCIWFIRSTPRIV+25
	#define PRISM54_DROP_UNENCRYPTED SIOCIWFIRSTPRIV+26

	static void show_set_key_error(struct prism2_hostapd_param *);

	static int hostapd_ioctl_prism54(struct wpa_driver_prism54_data *drv,
	struct prism2_hostapd_param *param,
	int len, int show_err)
	{
	struct iwreq iwr;

	os_memset(&iwr, 0, sizeof(iwr));
	os_strncpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
	iwr.u.data.pointer = (caddr_t) param;
	iwr.u.data.length = len;

	if (ioctl(drv->sock, PRISM54_HOSTAPD, &iwr) < 0) {
	int ret = errno;
	if (show_err)
	perror("ioctl[PRISM54_HOSTAPD]");
	return ret;
	}

	return 0;
	}


	static int wpa_driver_prism54_set_wpa_ie(struct wpa_driver_prism54_data *drv,
	const u8 *wpa_ie,
	size_t wpa_ie_len)
	{
	struct prism2_hostapd_param *param;
	int res;
	size_t blen = PRISM2_HOSTAPD_GENERIC_ELEMENT_HDR_LEN + wpa_ie_len;
	if (blen < sizeof(*param))
	blen = sizeof(*param);

	param = os_zalloc(blen);
	if (param == NULL)
	return -1;

	param->cmd = PRISM2_HOSTAPD_SET_GENERIC_ELEMENT;
	param->u.generic_elem.len = wpa_ie_len;
	os_memcpy(param->u.generic_elem.data, wpa_ie, wpa_ie_len);
	res = hostapd_ioctl_prism54(drv, param, blen, 1);

	os_free(param);

	return res;
	}


	/* This is called at wpa_supplicant daemon init time */
	static int wpa_driver_prism54_set_wpa(void *priv, int enabled)
	{
	struct wpa_driver_prism54_data *drv = priv;
	struct prism2_hostapd_param *param;
	int res;
	size_t blen = PRISM2_HOSTAPD_GENERIC_ELEMENT_HDR_LEN;
	if (blen < sizeof(*param))
	blen = sizeof(*param);

	param = os_zalloc(blen);
	if (param == NULL)
	return -1;

	param->cmd = PRISM54_SET_WPA;
	param->u.generic_elem.len = 0;
	res = hostapd_ioctl_prism54(drv, param, blen, 1);

	os_free(param);

	return res;
	}


	static int wpa_driver_prism54_set_key(void *priv, wpa_alg alg,
	const u8 *addr, int key_idx, int set_tx,
	const u8 *seq, size_t seq_len,
	const u8 *key, size_t key_len)
	{
	struct wpa_driver_prism54_data *drv = priv;
	struct prism2_hostapd_param *param;
	u8 *buf;
	size_t blen;
	int ret = 0;
	char *alg_name;

	switch (alg) {
	case WPA_ALG_NONE:
	alg_name = "none";
	return -1;
	break;
	case WPA_ALG_WEP:
	alg_name = "WEP";
	return -1;
	break;
	case WPA_ALG_TKIP:
	alg_name = "TKIP";
	break;
	case WPA_ALG_CCMP:
	alg_name = "CCMP";
	return -1;
	break;
	default:
	return -1;
	}

	wpa_printf(MSG_DEBUG, "%s: alg=%s key_idx=%d set_tx=%d seq_len=%lu "
	"key_len=%lu", __FUNCTION__, alg_name, key_idx, set_tx,
	(unsigned long) seq_len, (unsigned long) key_len);

	if (seq_len > 8)
	return -2;

	blen = sizeof(*param) + key_len;
	buf = os_zalloc(blen);
	if (buf == NULL)
	return -1;

	param = (struct prism2_hostapd_param *) buf;
	param->cmd = PRISM2_SET_ENCRYPTION;
	/* TODO: In theory, STA in client mode can use five keys; four default
	* keys for receiving (with keyidx 0..3) and one individual key for
	* both transmitting and receiving (keyidx 0) _unicast_ packets. Now,
	* keyidx 0 is reserved for this unicast use and default keys can only
	* use keyidx 1..3 (i.e., default key with keyidx 0 is not supported).
	* This should be fine for more or less all cases, but for completeness
	* sake, the driver could be enhanced to support the missing key. */
	#if 0
	if (addr == NULL)
	os_memset(param->sta_addr, 0xff, ETH_ALEN);
	else
	os_memcpy(param->sta_addr, addr, ETH_ALEN);
	#else
	os_memset(param->sta_addr, 0xff, ETH_ALEN);
	#endif
	os_strncpy((char *) param->u.crypt.alg, alg_name,
	HOSTAP_CRYPT_ALG_NAME_LEN);
	param->u.crypt.flags = set_tx ? HOSTAP_CRYPT_FLAG_SET_TX_KEY : 0;
	param->u.crypt.idx = key_idx;
	os_memcpy(param->u.crypt.seq, seq, seq_len);
	param->u.crypt.key_len = key_len;
	os_memcpy((u8 *) (param + 1), key, key_len);

	if (hostapd_ioctl_prism54(drv, param, blen, 1)) {
	wpa_printf(MSG_WARNING, "Failed to set encryption.");
	show_set_key_error(param);
	ret = -1;
	}
	os_free(buf);

	return ret;
	}


	static int wpa_driver_prism54_set_countermeasures(void *priv,
	int enabled)
	{
	/* FIX */
	printf("wpa_driver_prism54_set_countermeasures - not yet "
	"implemented\n");
	return 0;
	}


	static int wpa_driver_prism54_set_drop_unencrypted(void *priv,
	int enabled)
	{
	struct wpa_driver_prism54_data *drv = priv;
	struct prism2_hostapd_param *param;
	int res;
	size_t blen = PRISM2_HOSTAPD_GENERIC_ELEMENT_HDR_LEN;
	if (blen < sizeof(*param))
	blen = sizeof(*param);

	param = os_zalloc(blen);
	if (param == NULL)
	return -1;

	param->cmd = PRISM54_DROP_UNENCRYPTED;
	param->u.generic_elem.len = 0;
	res = hostapd_ioctl_prism54(drv, param, blen, 1);

	os_free(param);

	return res;
	}


	static int wpa_driver_prism54_deauthenticate(void priv, const u8 addr,
	int reason_code)
	{
	/* FIX */
	printf("wpa_driver_prism54_deauthenticate - not yet implemented\n");
	return 0;
	}


	static int wpa_driver_prism54_disassociate(void priv, const u8 addr,
	int reason_code)
	{
	/* FIX */
	printf("wpa_driver_prism54_disassociate - not yet implemented\n");
	return 0;
	}


	static int
	wpa_driver_prism54_associate(void *priv,
	struct wpa_driver_associate_params *params)
	{
	struct wpa_driver_prism54_data *drv = priv;
	int ret = 0;

	if (wpa_driver_prism54_set_wpa_ie(drv, params->wpa_ie,
	params->wpa_ie_len) < 0)
	ret = -1;
	if (wpa_driver_wext_set_freq(drv->wext, params->freq) < 0)
	ret = -1;
	if (wpa_driver_wext_set_ssid(drv->wext, params->ssid,
	params->ssid_len) < 0)
	ret = -1;
	if (wpa_driver_wext_set_bssid(drv->wext, params->bssid) < 0)
	ret = -1;

	return ret;
	}

	static void show_set_key_error(struct prism2_hostapd_param *param)
	{
	switch (param->u.crypt.err) {
	case HOSTAP_CRYPT_ERR_UNKNOWN_ALG:
	wpa_printf(MSG_INFO, "Unknown algorithm '%s'.",
	param->u.crypt.alg);
	wpa_printf(MSG_INFO, "You may need to load kernel module to "
	"register that algorithm.");
	wpa_printf(MSG_INFO, "E.g., 'modprobe hostap_crypt_wep' for "
	"WEP.");
	break;
	case HOSTAP_CRYPT_ERR_UNKNOWN_ADDR:
	wpa_printf(MSG_INFO, "Unknown address " MACSTR ".",
	MAC2STR(param->sta_addr));
	break;
	case HOSTAP_CRYPT_ERR_CRYPT_INIT_FAILED:
	wpa_printf(MSG_INFO, "Crypt algorithm initialization failed.");
	break;
	case HOSTAP_CRYPT_ERR_KEY_SET_FAILED:
	wpa_printf(MSG_INFO, "Key setting failed.");
	break;
	case HOSTAP_CRYPT_ERR_TX_KEY_SET_FAILED:
	wpa_printf(MSG_INFO, "TX key index setting failed.");
	break;
	case HOSTAP_CRYPT_ERR_CARD_CONF_FAILED:
	wpa_printf(MSG_INFO, "Card configuration failed.");
	break;
	}
	}


	static int wpa_driver_prism54_get_bssid(void priv, u8 bssid)
	{
	struct wpa_driver_prism54_data *drv = priv;
	return wpa_driver_wext_get_bssid(drv->wext, bssid);
	}


	static int wpa_driver_prism54_get_ssid(void priv, u8 ssid)
	{
	struct wpa_driver_prism54_data *drv = priv;
	return wpa_driver_wext_get_ssid(drv->wext, ssid);
	}


	static int wpa_driver_prism54_scan(void priv, const u8 ssid, size_t ssid_len)
	{
	struct wpa_driver_prism54_data *drv = priv;
	return wpa_driver_wext_scan(drv->wext, ssid, ssid_len);
	}


	static int wpa_driver_prism54_get_scan_results(void *priv,
	struct wpa_scan_result *results,
	size_t max_size)
	{
	struct wpa_driver_prism54_data *drv = priv;
	return wpa_driver_wext_get_scan_results(drv->wext, results, max_size);
	}


	static int wpa_driver_prism54_set_operstate(void *priv, int state)
	{
	struct wpa_driver_prism54_data *drv = priv;
	return wpa_driver_wext_set_operstate(drv->wext, state);
	}


	static void * wpa_driver_prism54_init(void ctx, const char ifname)
	{
	struct wpa_driver_prism54_data *drv;

	drv = os_zalloc(sizeof(*drv));
	if (drv == NULL)
	return NULL;
	drv->wext = wpa_driver_wext_init(ctx, ifname);
	if (drv->wext == NULL) {
	os_free(drv);
	return NULL;
	}

	drv->ctx = ctx;
	os_strncpy(drv->ifname, ifname, sizeof(drv->ifname));
	drv->sock = socket(PF_INET, SOCK_DGRAM, 0);
	if (drv->sock < 0) {
	wpa_driver_wext_deinit(drv->wext);
	os_free(drv);
	return NULL;
	}

	return drv;
	}


	static void wpa_driver_prism54_deinit(void *priv)
	{
	struct wpa_driver_prism54_data *drv = priv;
	wpa_driver_wext_deinit(drv->wext);
	close(drv->sock);
	os_free(drv);
	}


	const struct wpa_driver_ops wpa_driver_prism54_ops = {
	.name = "prism54",
	.desc = "Prism54.org driver (Intersil Prism GT/Duette/Indigo)",
	.get_bssid = wpa_driver_prism54_get_bssid,
	.get_ssid = wpa_driver_prism54_get_ssid,
	.set_wpa = wpa_driver_prism54_set_wpa,
	.set_key = wpa_driver_prism54_set_key,
	.set_countermeasures = wpa_driver_prism54_set_countermeasures,
	.set_drop_unencrypted = wpa_driver_prism54_set_drop_unencrypted,
	.scan = wpa_driver_prism54_scan,
	.get_scan_results = wpa_driver_prism54_get_scan_results,
	.deauthenticate = wpa_driver_prism54_deauthenticate,
	.disassociate = wpa_driver_prism54_disassociate,
	.associate = wpa_driver_prism54_associate,
	.init = wpa_driver_prism54_init,
	.deinit = wpa_driver_prism54_deinit,
	.set_operstate = wpa_driver_prism54_set_operstate,
	};