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driver_prism54.c
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driver_prism54.c
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/*
* WPA Supplicant - driver interaction with Linux Prism54.org driver
* Copyright (c) 2003-2005, Jouni Malinen <[email protected]>
* Copyright (c) 2004, Luis R. Rodriguez <[email protected]>
*
* 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,
};