driver_madwifi.c

IEEE802.11 a/b/g 客户端应用程序源代码

/*
 * WPA Supplicant - driver interaction with MADWIFI 802.11 driver
 * Copyright (c) 2004, Sam Leffler <[e-mail]>
 * Copyright (c) 2004-2005, Jouni Malinen <[e-mail]>
 *
 * 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);