jeltz/hostap
1
0
Fork 0
Code Issues Pull requests Projects Releases Wiki Activity
hostap/src/drivers/driver_madwifi.c

565 lines
15 KiB
C
Raw Blame History

/*
* WPA Supplicant - driver interaction with MADWIFI 802.11 driver
* Copyright (c) 2004, Sam Leffler <sam@errno.com>
* Copyright (c) 2004-2005, Jouni Malinen <j@w1.fi>
*
* 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 "common.h"
#include "driver.h"
#include "driver_wext.h"
#include "eloop.h"
#include "ieee802_11_defs.h"
#include "wireless_copy.h"
#include <include/compat.h>
#include <net80211/ieee80211.h>
#ifdef WME_NUM_AC
/* Assume this is built against BSD branch of madwifi driver. */
#define MADWIFI_BSD
#include <net80211/_ieee80211.h>
#endif /* WME_NUM_AC */
#include <net80211/ieee80211_crypto.h>
#include <net80211/ieee80211_ioctl.h>
#ifdef IEEE80211_IOCTL_SETWMMPARAMS
/* Assume this is built against madwifi-ng */
#define MADWIFI_NG
#endif /* IEEE80211_IOCTL_SETWMMPARAMS */
struct wpa_driver_madwifi_data {
void *wext; /* private data for driver_wext */
void *ctx;
char ifname[IFNAMSIZ + 1];
int sock;
};
static int
set80211priv(struct wpa_driver_madwifi_data *drv, int op, void *data, int len,
int show_err)
{
struct iwreq iwr;
os_memset(&iwr, 0, sizeof(iwr));
os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
if (len < IFNAMSIZ) {
/*
* Argument data fits inline; put it there.
*/
os_memcpy(iwr.u.name, data, len);
} else {
/*
* Argument data too big for inline transfer; setup a
* parameter block instead; the kernel will transfer
* the data for the driver.
*/
iwr.u.data.pointer = data;
iwr.u.data.length = len;
}
if (ioctl(drv->sock, op, &iwr) < 0) {
if (show_err) {
#ifdef MADWIFI_NG
int first = IEEE80211_IOCTL_SETPARAM;
int last = IEEE80211_IOCTL_KICKMAC;
static const char *opnames[] = {
"ioctl[IEEE80211_IOCTL_SETPARAM]",
"ioctl[IEEE80211_IOCTL_GETPARAM]",
"ioctl[IEEE80211_IOCTL_SETMODE]",
"ioctl[IEEE80211_IOCTL_GETMODE]",
"ioctl[IEEE80211_IOCTL_SETWMMPARAMS]",
"ioctl[IEEE80211_IOCTL_GETWMMPARAMS]",
"ioctl[IEEE80211_IOCTL_SETCHANLIST]",
"ioctl[IEEE80211_IOCTL_GETCHANLIST]",
"ioctl[IEEE80211_IOCTL_CHANSWITCH]",
NULL,
NULL,
"ioctl[IEEE80211_IOCTL_GETSCANRESULTS]",
NULL,
"ioctl[IEEE80211_IOCTL_GETCHANINFO]",
"ioctl[IEEE80211_IOCTL_SETOPTIE]",
"ioctl[IEEE80211_IOCTL_GETOPTIE]",
"ioctl[IEEE80211_IOCTL_SETMLME]",
NULL,
"ioctl[IEEE80211_IOCTL_SETKEY]",
NULL,
"ioctl[IEEE80211_IOCTL_DELKEY]",
NULL,
"ioctl[IEEE80211_IOCTL_ADDMAC]",
NULL,
"ioctl[IEEE80211_IOCTL_DELMAC]",
NULL,
"ioctl[IEEE80211_IOCTL_WDSMAC]",
NULL,
"ioctl[IEEE80211_IOCTL_WDSDELMAC]",
NULL,
"ioctl[IEEE80211_IOCTL_KICKMAC]",
};
#else /* MADWIFI_NG */
int first = IEEE80211_IOCTL_SETPARAM;
int last = IEEE80211_IOCTL_CHANLIST;
static const char *opnames[] = {
"ioctl[IEEE80211_IOCTL_SETPARAM]",
"ioctl[IEEE80211_IOCTL_GETPARAM]",
"ioctl[IEEE80211_IOCTL_SETKEY]",
"ioctl[IEEE80211_IOCTL_GETKEY]",
"ioctl[IEEE80211_IOCTL_DELKEY]",
NULL,
"ioctl[IEEE80211_IOCTL_SETMLME]",
NULL,
"ioctl[IEEE80211_IOCTL_SETOPTIE]",
"ioctl[IEEE80211_IOCTL_GETOPTIE]",
"ioctl[IEEE80211_IOCTL_ADDMAC]",
NULL,
"ioctl[IEEE80211_IOCTL_DELMAC]",
NULL,
"ioctl[IEEE80211_IOCTL_CHANLIST]",
};
#endif /* MADWIFI_NG */
int idx = op - first;
if (first <= op && op <= last &&
idx < (int) (sizeof(opnames) / sizeof(opnames[0]))
&& opnames[idx])
perror(opnames[idx]);
else
perror("ioctl[unknown???]");
}
return -1;
}
return 0;
}
static int
set80211param(struct wpa_driver_madwifi_data *drv, int op, int arg,
int show_err)
{
struct iwreq iwr;
os_memset(&iwr, 0, sizeof(iwr));
os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
iwr.u.mode = op;
os_memcpy(iwr.u.name+sizeof(u32), &arg, sizeof(arg));
if (ioctl(drv->sock, IEEE80211_IOCTL_SETPARAM, &iwr) < 0) {
if (show_err)
perror("ioctl[IEEE80211_IOCTL_SETPARAM]");
return -1;
}
return 0;
}
static int
wpa_driver_madwifi_set_wpa_ie(struct wpa_driver_madwifi_data *drv,
const u8 *wpa_ie, size_t wpa_ie_len)
{
struct iwreq iwr;
os_memset(&iwr, 0, sizeof(iwr));
os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
/* NB: SETOPTIE is not fixed-size so must not be inlined */
iwr.u.data.pointer = (void *) wpa_ie;
iwr.u.data.length = wpa_ie_len;
if (ioctl(drv->sock, IEEE80211_IOCTL_SETOPTIE, &iwr) < 0) {
perror("ioctl[IEEE80211_IOCTL_SETOPTIE]");
return -1;
}
return 0;
}
static int
wpa_driver_madwifi_del_key(struct wpa_driver_madwifi_data *drv, int key_idx,
const u8 *addr)
{
struct ieee80211req_del_key wk;
wpa_printf(MSG_DEBUG, "%s: keyidx=%d", __FUNCTION__, key_idx);
os_memset(&wk, 0, sizeof(wk));
wk.idk_keyix = key_idx;
if (addr != NULL)
os_memcpy(wk.idk_macaddr, addr, IEEE80211_ADDR_LEN);
return set80211priv(drv, IEEE80211_IOCTL_DELKEY, &wk, sizeof(wk), 1);
}
static int
wpa_driver_madwifi_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_madwifi_data *drv = priv;
struct ieee80211req_key wk;
char *alg_name;
u_int8_t cipher;
if (alg == WPA_ALG_NONE)
return wpa_driver_madwifi_del_key(drv, key_idx, addr);
switch (alg) {
case WPA_ALG_WEP:
if (addr == NULL || os_memcmp(addr, "\xff\xff\xff\xff\xff\xff",
ETH_ALEN) == 0) {
/*
* madwifi did not seem to like static WEP key
* configuration with IEEE80211_IOCTL_SETKEY, so use
* Linux wireless extensions ioctl for this.
*/
return wpa_driver_wext_set_key(drv->wext, alg, addr,
key_idx, set_tx,
seq, seq_len,
key, key_len);
}
alg_name = "WEP";
cipher = IEEE80211_CIPHER_WEP;
break;
case WPA_ALG_TKIP:
alg_name = "TKIP";
cipher = IEEE80211_CIPHER_TKIP;
break;
case WPA_ALG_CCMP:
alg_name = "CCMP";
cipher = IEEE80211_CIPHER_AES_CCM;
break;
default:
wpa_printf(MSG_DEBUG, "%s: unknown/unsupported algorithm %d",
__FUNCTION__, alg);
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 > sizeof(u_int64_t)) {
wpa_printf(MSG_DEBUG, "%s: seq_len %lu too big",
__FUNCTION__, (unsigned long) seq_len);
return -2;
}
if (key_len > sizeof(wk.ik_keydata)) {
wpa_printf(MSG_DEBUG, "%s: key length %lu too big",
__FUNCTION__, (unsigned long) key_len);
return -3;
}
os_memset(&wk, 0, sizeof(wk));
wk.ik_type = cipher;
wk.ik_flags = IEEE80211_KEY_RECV;
if (addr == NULL ||
os_memcmp(addr, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) == 0)
wk.ik_flags |= IEEE80211_KEY_GROUP;
if (set_tx) {
wk.ik_flags |= IEEE80211_KEY_XMIT | IEEE80211_KEY_DEFAULT;
os_memcpy(wk.ik_macaddr, addr, IEEE80211_ADDR_LEN);
} else
os_memset(wk.ik_macaddr, 0, IEEE80211_ADDR_LEN);
wk.ik_keyix = key_idx;
wk.ik_keylen = key_len;
#ifdef WORDS_BIGENDIAN
#define WPA_KEY_RSC_LEN 8
{
size_t i;
u8 tmp[WPA_KEY_RSC_LEN];
os_memset(tmp, 0, sizeof(tmp));
for (i = 0; i < seq_len; i++)
tmp[WPA_KEY_RSC_LEN - i - 1] = seq[i];
os_memcpy(&wk.ik_keyrsc, tmp, WPA_KEY_RSC_LEN);
}
#else /* WORDS_BIGENDIAN */
os_memcpy(&wk.ik_keyrsc, seq, seq_len);
#endif /* WORDS_BIGENDIAN */
os_memcpy(wk.ik_keydata, key, key_len);
return set80211priv(drv, IEEE80211_IOCTL_SETKEY, &wk, sizeof(wk), 1);
}
static int
wpa_driver_madwifi_set_countermeasures(void *priv, int enabled)
{
struct wpa_driver_madwifi_data *drv = priv;
wpa_printf(MSG_DEBUG, "%s: enabled=%d", __FUNCTION__, enabled);
return set80211param(drv, IEEE80211_PARAM_COUNTERMEASURES, enabled, 1);
}
static int
wpa_driver_madwifi_set_drop_unencrypted(void *priv, int enabled)
{
struct wpa_driver_madwifi_data *drv = priv;
wpa_printf(MSG_DEBUG, "%s: enabled=%d", __FUNCTION__, enabled);
return set80211param(drv, IEEE80211_PARAM_DROPUNENCRYPTED, enabled, 1);
}
static int
wpa_driver_madwifi_deauthenticate(void *priv, const u8 *addr, int reason_code)
{
struct wpa_driver_madwifi_data *drv = priv;
struct ieee80211req_mlme mlme;
wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
mlme.im_op = IEEE80211_MLME_DEAUTH;
mlme.im_reason = reason_code;
os_memcpy(mlme.im_macaddr, addr, IEEE80211_ADDR_LEN);
return set80211priv(drv, IEEE80211_IOCTL_SETMLME, &mlme, sizeof(mlme), 1);
}
static int
wpa_driver_madwifi_disassociate(void *priv, const u8 *addr, int reason_code)
{
struct wpa_driver_madwifi_data *drv = priv;
struct ieee80211req_mlme mlme;
wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
mlme.im_op = IEEE80211_MLME_DISASSOC;
mlme.im_reason = reason_code;
os_memcpy(mlme.im_macaddr, addr, IEEE80211_ADDR_LEN);
return set80211priv(drv, IEEE80211_IOCTL_SETMLME, &mlme, sizeof(mlme), 1);
}
static int
wpa_driver_madwifi_associate(void *priv,
struct wpa_driver_associate_params *params)
{
struct wpa_driver_madwifi_data *drv = priv;
struct ieee80211req_mlme mlme;
int ret = 0, privacy = 1;
wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
/*
* NB: Don't need to set the freq or cipher-related state as
* this is implied by the bssid which is used to locate
* the scanned node state which holds it. The ssid is
* needed to disambiguate an AP that broadcasts multiple
* ssid's but uses the same bssid.
*/
/* XXX error handling is wrong but unclear what to do... */
if (wpa_driver_madwifi_set_wpa_ie(drv, params->wpa_ie,
params->wpa_ie_len) < 0)
ret = -1;
if (params->pairwise_suite == CIPHER_NONE &&
params->group_suite == CIPHER_NONE &&
params->key_mgmt_suite == KEY_MGMT_NONE &&
params->wpa_ie_len == 0)
privacy = 0;
if (set80211param(drv, IEEE80211_PARAM_PRIVACY, privacy, 1) < 0)
ret = -1;
if (params->wpa_ie_len &&
set80211param(drv, IEEE80211_PARAM_WPA,
params->wpa_ie[0] == WLAN_EID_RSN ? 2 : 1, 1) < 0)
ret = -1;
if (params->bssid == NULL) {
/* ap_scan=2 mode - driver takes care of AP selection and
* roaming */
/* FIX: this does not seem to work; would probably need to
* change something in the driver */
if (set80211param(drv, IEEE80211_PARAM_ROAMING, 0, 1) < 0)
ret = -1;
if (wpa_driver_wext_set_ssid(drv->wext, params->ssid,
params->ssid_len) < 0)
ret = -1;
} else {
if (set80211param(drv, IEEE80211_PARAM_ROAMING, 2, 1) < 0)
ret = -1;
if (wpa_driver_wext_set_ssid(drv->wext, params->ssid,
params->ssid_len) < 0)
ret = -1;
os_memset(&mlme, 0, sizeof(mlme));
mlme.im_op = IEEE80211_MLME_ASSOC;
os_memcpy(mlme.im_macaddr, params->bssid, IEEE80211_ADDR_LEN);
if (set80211priv(drv, IEEE80211_IOCTL_SETMLME, &mlme,
sizeof(mlme), 1) < 0) {
wpa_printf(MSG_DEBUG, "%s: SETMLME[ASSOC] failed",
__func__);
ret = -1;
}
}
return ret;
}
static int
wpa_driver_madwifi_set_auth_alg(void *priv, int auth_alg)
{
struct wpa_driver_madwifi_data *drv = priv;
int authmode;
if ((auth_alg & AUTH_ALG_OPEN_SYSTEM) &&
(auth_alg & AUTH_ALG_SHARED_KEY))
authmode = IEEE80211_AUTH_AUTO;
else if (auth_alg & AUTH_ALG_SHARED_KEY)
authmode = IEEE80211_AUTH_SHARED;
else
authmode = IEEE80211_AUTH_OPEN;
return set80211param(drv, IEEE80211_PARAM_AUTHMODE, authmode, 1);
}
static int
wpa_driver_madwifi_scan(void *priv, const u8 *ssid, size_t ssid_len)
{
struct wpa_driver_madwifi_data *drv = priv;
struct iwreq iwr;
int ret = 0;
os_memset(&iwr, 0, sizeof(iwr));
os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
/* set desired ssid before scan */
/* FIX: scan should not break the current association, so using
* set_ssid may not be the best way of doing this.. */
if (wpa_driver_wext_set_ssid(drv->wext, ssid, ssid_len) < 0)
ret = -1;
if (ioctl(drv->sock, SIOCSIWSCAN, &iwr) < 0) {
perror("ioctl[SIOCSIWSCAN]");
ret = -1;
}
/*
* madwifi delivers a scan complete event so no need to poll, but
* register a backup timeout anyway to make sure that we recover even
* if the driver does not send this event for any reason. This timeout
* will only be used if the event is not delivered (event handler will
* cancel the timeout).
*/
eloop_cancel_timeout(wpa_driver_wext_scan_timeout, drv->wext,
drv->ctx);
eloop_register_timeout(30, 0, wpa_driver_wext_scan_timeout, drv->wext,
drv->ctx);
return ret;
}
static int wpa_driver_madwifi_get_bssid(void *priv, u8 *bssid)
{
struct wpa_driver_madwifi_data *drv = priv;
return wpa_driver_wext_get_bssid(drv->wext, bssid);
}
static int wpa_driver_madwifi_get_ssid(void *priv, u8 *ssid)
{
struct wpa_driver_madwifi_data *drv = priv;
return wpa_driver_wext_get_ssid(drv->wext, ssid);
}
static struct wpa_scan_results *
wpa_driver_madwifi_get_scan_results(void *priv)
{
struct wpa_driver_madwifi_data *drv = priv;
return wpa_driver_wext_get_scan_results(drv->wext);
}
static int wpa_driver_madwifi_set_operstate(void *priv, int state)
{
struct wpa_driver_madwifi_data *drv = priv;
return wpa_driver_wext_set_operstate(drv->wext, state);
}
static void * wpa_driver_madwifi_init(void *ctx, const char *ifname)
{
struct wpa_driver_madwifi_data *drv;
drv = os_zalloc(sizeof(*drv));
if (drv == NULL)
return NULL;
drv->wext = wpa_driver_wext_init(ctx, ifname);
if (drv->wext == NULL)
goto fail;
drv->ctx = ctx;
os_strlcpy(drv->ifname, ifname, sizeof(drv->ifname));
drv->sock = socket(PF_INET, SOCK_DGRAM, 0);
if (drv->sock < 0)
goto fail2;
if (set80211param(drv, IEEE80211_PARAM_ROAMING, 2, 1) < 0) {
wpa_printf(MSG_DEBUG, "%s: failed to set wpa_supplicant-based "
"roaming", __FUNCTION__);
goto fail3;
}
if (set80211param(drv, IEEE80211_PARAM_WPA, 3, 1) < 0) {
wpa_printf(MSG_DEBUG, "%s: failed to enable WPA support",
__FUNCTION__);
goto fail3;
}
return drv;
fail3:
close(drv->sock);
fail2:
wpa_driver_wext_deinit(drv->wext);
fail:
os_free(drv);
return NULL;
}
static void wpa_driver_madwifi_deinit(void *priv)
{
struct wpa_driver_madwifi_data *drv = priv;
if (wpa_driver_madwifi_set_wpa_ie(drv, NULL, 0) < 0) {
wpa_printf(MSG_DEBUG, "%s: failed to clear WPA IE",
__FUNCTION__);
}
if (set80211param(drv, IEEE80211_PARAM_ROAMING, 0, 1) < 0) {
wpa_printf(MSG_DEBUG, "%s: failed to enable driver-based "
"roaming", __FUNCTION__);
}
if (set80211param(drv, IEEE80211_PARAM_PRIVACY, 0, 1) < 0) {
wpa_printf(MSG_DEBUG, "%s: failed to disable forced Privacy "
"flag", __FUNCTION__);
}
if (set80211param(drv, IEEE80211_PARAM_WPA, 0, 1) < 0) {
wpa_printf(MSG_DEBUG, "%s: failed to disable WPA",
__FUNCTION__);
}
wpa_driver_wext_deinit(drv->wext);
close(drv->sock);
os_free(drv);
}
const struct wpa_driver_ops wpa_driver_madwifi_ops = {
.name = "madwifi",
.desc = "MADWIFI 802.11 support (Atheros, etc.)",
.get_bssid = wpa_driver_madwifi_get_bssid,
.get_ssid = wpa_driver_madwifi_get_ssid,
.set_key = wpa_driver_madwifi_set_key,
.init = wpa_driver_madwifi_init,
.deinit = wpa_driver_madwifi_deinit,
.set_countermeasures = wpa_driver_madwifi_set_countermeasures,
.set_drop_unencrypted = wpa_driver_madwifi_set_drop_unencrypted,
.scan = wpa_driver_madwifi_scan,
.get_scan_results2 = wpa_driver_madwifi_get_scan_results,
.deauthenticate = wpa_driver_madwifi_deauthenticate,
.disassociate = wpa_driver_madwifi_disassociate,
.associate = wpa_driver_madwifi_associate,
.set_auth_alg = wpa_driver_madwifi_set_auth_alg,
.set_operstate = wpa_driver_madwifi_set_operstate,
};
Reference in a new issue View git blame Copy permalink