driver_atheros.c

最新的Host AP 新添加了许多pcmcia 的驱动

/*
 * hostapd / Driver interaction with Atheros driver
 * Copyright (c) 2004, Sam Leffler <[e-mail]>
 * Copyright (c) 2004, Video54 Technologies
 * Copyright (c) 2005-2007, Jouni Malinen <[e-mail]>
 * Copyright (c) 2009, Atheros Communications
 *
 * 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 <net/if.h>
#include <sys/ioctl.h>

#include "common.h"
#ifndef _BYTE_ORDER
#ifdef WORDS_BIGENDIAN
#define _BYTE_ORDER _BIG_ENDIAN
#else
#define _BYTE_ORDER _LITTLE_ENDIAN
#endif
#endif /* _BYTE_ORDER */

#include <net80211/ieee80211.h>
#include <net80211/_ieee80211.h>
#include <net80211/ieee80211_crypto.h>

/*
 * Note, the ATH_WPS_IE setting must match with the driver build.. If the
 * driver does not include this, the IEEE80211_IOCTL_GETWPAIE ioctl will fail.
 */
#define ATH_WPS_IE
#include <net80211/ieee80211_ioctl.h>

#ifdef CONFIG_WPS
#ifdef IEEE80211_IOCTL_FILTERFRAME
#include <netpacket/packet.h>

#ifndef ETH_P_80211_RAW
#define ETH_P_80211_RAW 0x0019
#endif
#endif /* IEEE80211_IOCTL_FILTERFRAME */
#endif /* CONFIG_WPS */

/*
 * Avoid conflicts with hostapd definitions by undefining couple of defines
 * from madwifi header files.
 */
#undef WPA_OUI_TYPE
#undef WME_OUI_TYPE

#include "wireless_copy.h"

#include "hostapd.h"
#include "driver.h"
#include "eloop.h"
#include "priv_netlink.h"
#include "l2_packet/l2_packet.h"

#include "wps_hostapd.h"
#include "ieee802_11_defs.h"


struct madwifi_driver_data {
	struct hostapd_data *hapd;		/* back pointer */

	char	iface[IFNAMSIZ + 1];
	int     ifindex;
	struct l2_packet_data *sock_xmit;	/* raw packet xmit socket */
	struct l2_packet_data *sock_recv;	/* raw packet recv socket */
	int	ioctl_sock;			/* socket for ioctl() use */
	int	wext_sock;			/* socket for wireless events */
	int	we_version;
	u8	acct_mac[ETH_ALEN];
	struct hostap_sta_driver_data acct_data;

	struct l2_packet_data *sock_raw; /* raw 802.11 management frames */
};

static int madwifi_sta_deauth(void *priv, const u8 *addr, int reason_code);

/* hostapd 0.7.x compatibility - START */
#include "ieee802_1x.h"
#include "sta_info.h"
#include "wpa.h"
#include "radius/radius.h"
#include "ieee802_11.h"
#include "accounting.h"

static int hostapd_notif_assoc(struct hostapd_data *hapd, const u8 *addr,
			       const u8 *ie, size_t ielen)
{
	struct sta_info *sta;
	int new_assoc, res;

	hostapd_logger(hapd, addr, HOSTAPD_MODULE_IEEE80211,
		       HOSTAPD_LEVEL_INFO, "associated");

	sta = ap_get_sta(hapd, addr);
	if (sta) {
		accounting_sta_stop(hapd, sta);
	} else {
		sta = ap_sta_add(hapd, addr);
		if (sta == NULL)
			return -1;
	}
	sta->flags &= ~(WLAN_STA_WPS | WLAN_STA_MAYBE_WPS);

	if (hapd->conf->wpa) {
		if (ie == NULL || ielen == 0) {
			if (hapd->conf->wps_state) {
				wpa_printf(MSG_DEBUG, "STA did not include "
					   "WPA/RSN IE in (Re)Association "
					   "Request - possible WPS use");
				sta->flags |= WLAN_STA_MAYBE_WPS;
				goto skip_wpa_check;
			}

			wpa_printf(MSG_DEBUG, "No WPA/RSN IE from STA");
			return -1;
		}
		if (hapd->conf->wps_state && ie[0] == 0xdd && ie[1] >= 4 &&
		    os_memcmp(ie + 2, "\x00\x50\xf2\x04", 4) == 0) {
			sta->flags |= WLAN_STA_WPS;
			goto skip_wpa_check;
		}

		if (sta->wpa_sm == NULL)
			sta->wpa_sm = wpa_auth_sta_init(hapd->wpa_auth,
							sta->addr);
		if (sta->wpa_sm == NULL) {
			wpa_printf(MSG_ERROR, "Failed to initialize WPA state "
				   "machine");
			return -1;
		}
		res = wpa_validate_wpa_ie(hapd->wpa_auth, sta->wpa_sm,
					  ie, ielen, NULL, 0);
		if (res != WPA_IE_OK) {
			wpa_printf(MSG_DEBUG, "WPA/RSN information element "
				   "rejected? (res %u)", res);
			wpa_hexdump(MSG_DEBUG, "IE", ie, ielen);
			return -1;
		}
	} else if (hapd->conf->wps_state) {
		if (ie && ielen > 4 && ie[0] == 0xdd && ie[1] >= 4 &&
		    os_memcmp(ie + 2, "\x00\x50\xf2\x04", 4) == 0) {
			sta->flags |= WLAN_STA_WPS;
		} else
			sta->flags |= WLAN_STA_MAYBE_WPS;
	}
skip_wpa_check:

	new_assoc = (sta->flags & WLAN_STA_ASSOC) == 0;
	sta->flags |= WLAN_STA_AUTH | WLAN_STA_ASSOC;
	wpa_auth_sm_event(sta->wpa_sm, WPA_ASSOC);

	hostapd_new_assoc_sta(hapd, sta, !new_assoc);

	ieee802_1x_notify_port_enabled(sta->eapol_sm, 1);

	return 0;
}


static void hostapd_notif_disassoc(struct hostapd_data *hapd, const u8 *addr)
{
	struct sta_info *sta;

	hostapd_logger(hapd, addr, HOSTAPD_MODULE_IEEE80211,
		       HOSTAPD_LEVEL_INFO, "disassociated");

	sta = ap_get_sta(hapd, addr);
	if (sta == NULL) {
		wpa_printf(MSG_DEBUG, "Disassociation notification for "
			   "unknown STA " MACSTR, MAC2STR(addr));
		return;
	}

	sta->flags &= ~(WLAN_STA_AUTH | WLAN_STA_ASSOC);
	wpa_auth_sm_event(sta->wpa_sm, WPA_DISASSOC);
	sta->acct_terminate_cause = RADIUS_ACCT_TERMINATE_CAUSE_USER_REQUEST;
	ieee802_1x_notify_port_enabled(sta->eapol_sm, 0);
	ap_free_sta(hapd, sta);
}


static void hostapd_eapol_receive(struct hostapd_data *hapd, const u8 *sa,
				  const u8 *buf, size_t len)
{
	ieee802_1x_receive(hapd, sa, buf, len);
}


static void hostapd_michael_mic_failure(struct hostapd_data *hapd,
					const u8 *addr)
{
	ieee80211_michael_mic_failure(hapd, addr, 1);
}
/* hostapd 0.7.x compatibility - END */

static int
set80211priv(struct madwifi_driver_data *drv, int op, void *data, int len)
{
	struct iwreq iwr;
	int do_inline = len < IFNAMSIZ;

	/* Certain ioctls must use the non-inlined method */
	if (op == IEEE80211_IOCTL_SET_APPIEBUF ||
	    op == IEEE80211_IOCTL_FILTERFRAME)
		do_inline = 0;

	memset(&iwr, 0, sizeof(iwr));
	os_strlcpy(iwr.ifr_name, drv->iface, IFNAMSIZ);
	if (do_inline) {
		/*
		 * Argument data fits inline; put it there.
		 */
		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->ioctl_sock, op, &iwr) < 0) {
		int first = IEEE80211_IOCTL_SETPARAM;
		static const char *opnames[] = {
			"ioctl[IEEE80211_IOCTL_SETPARAM]",
			"ioctl[IEEE80211_IOCTL_GETPARAM]",
			"ioctl[IEEE80211_IOCTL_SETKEY]",
			"ioctl[IEEE80211_IOCTL_SETWMMPARAMS]",
			"ioctl[IEEE80211_IOCTL_DELKEY]",
			"ioctl[IEEE80211_IOCTL_GETWMMPARAMS]",
			"ioctl[IEEE80211_IOCTL_SETMLME]",
			"ioctl[IEEE80211_IOCTL_GETCHANINFO]",
			"ioctl[IEEE80211_IOCTL_SETOPTIE]",
			"ioctl[IEEE80211_IOCTL_GETOPTIE]",
			"ioctl[IEEE80211_IOCTL_ADDMAC]",
			"ioctl[IEEE80211_IOCTL_DELMAC]",
			"ioctl[IEEE80211_IOCTL_GETCHANLIST]",
			"ioctl[IEEE80211_IOCTL_SETCHANLIST]",
			"ioctl[IEEE80211_IOCTL_KICKMAC]",
			"ioctl[IEEE80211_IOCTL_CHANSWITCH]",
			"ioctl[IEEE80211_IOCTL_GETMODE]",
			"ioctl[IEEE80211_IOCTL_SETMODE]",
			"ioctl[IEEE80211_IOCTL_GET_APPIEBUF]",
			"ioctl[IEEE80211_IOCTL_SET_APPIEBUF]",
			NULL,
			"ioctl[IEEE80211_IOCTL_FILTERFRAME]",
		};
		int idx = op - first;
		if (first <= op &&
		    idx < (int) (sizeof(opnames) / sizeof(opnames[0])) &&
		    opnames[idx])
			perror(opnames[idx]);
		else {
			perror("ioctl[unknown???]");
			wpa_printf(MSG_DEBUG, "Failed ioctl: 0x%x", op);
		}
		return -1;
	}
	return 0;
}

static int
set80211param(struct madwifi_driver_data *drv, int op, int arg)
{
	struct iwreq iwr;

	memset(&iwr, 0, sizeof(iwr));
	os_strlcpy(iwr.ifr_name, drv->iface, IFNAMSIZ);
	iwr.u.mode = op;
	memcpy(iwr.u.name+sizeof(__u32), &arg, sizeof(arg));

	if (ioctl(drv->ioctl_sock, IEEE80211_IOCTL_SETPARAM, &iwr) < 0) {
		perror("ioctl[IEEE80211_IOCTL_SETPARAM]");
		wpa_printf(MSG_DEBUG, "%s: Failed to set parameter (op %d "
			   "arg %d)", __func__, op, arg);
		return -1;
	}
	return 0;
}

#ifndef CONFIG_NO_STDOUT_DEBUG
static const char *
ether_sprintf(const u8 *addr)
{
	static char buf[sizeof(MACSTR)];

	if (addr != NULL)
		snprintf(buf, sizeof(buf), MACSTR, MAC2STR(addr));
	else
		snprintf(buf, sizeof(buf), MACSTR, 0,0,0,0,0,0);
	return buf;
}
#endif /* CONFIG_NO_STDOUT_DEBUG */

/*
 * Configure WPA parameters.
 */
static int
madwifi_configure_wpa(struct madwifi_driver_data *drv)
{
	struct hostapd_data *hapd = drv->hapd;
	struct hostapd_bss_config *conf = hapd->conf;
	int v;

	switch (conf->wpa_group) {
	case WPA_CIPHER_CCMP:
		v = IEEE80211_CIPHER_AES_CCM;
		break;
	case WPA_CIPHER_TKIP:
		v = IEEE80211_CIPHER_TKIP;
		break;
	case WPA_CIPHER_WEP104:
		v = IEEE80211_CIPHER_WEP;
		break;
	case WPA_CIPHER_WEP40:
		v = IEEE80211_CIPHER_WEP;
		break;
	case WPA_CIPHER_NONE:
		v = IEEE80211_CIPHER_NONE;
		break;
	default:
		wpa_printf(MSG_ERROR, "Unknown group key cipher %u",
			   conf->wpa_group);
		return -1;
	}
	wpa_printf(MSG_DEBUG, "%s: group key cipher=%d", __func__, v);
	if (set80211param(drv, IEEE80211_PARAM_MCASTCIPHER, v)) {
		printf("Unable to set group key cipher to %u\n", v);
		return -1;
	}
	if (v == IEEE80211_CIPHER_WEP) {
		/* key length is done only for specific ciphers */
		v = (conf->wpa_group == WPA_CIPHER_WEP104 ? 13 : 5);
		if (set80211param(drv, IEEE80211_PARAM_MCASTKEYLEN, v)) {
			printf("Unable to set group key length to %u\n", v);
			return -1;
		}
	}

	v = 0;
	if (conf->wpa_pairwise & WPA_CIPHER_CCMP)
		v |= 1<<IEEE80211_CIPHER_AES_CCM;
	if (conf->wpa_pairwise & WPA_CIPHER_TKIP)
		v |= 1<<IEEE80211_CIPHER_TKIP;
	if (conf->wpa_pairwise & WPA_CIPHER_NONE)
		v |= 1<<IEEE80211_CIPHER_NONE;
	wpa_printf(MSG_DEBUG, "%s: pairwise key ciphers=0x%x", __func__, v);
	if (set80211param(drv, IEEE80211_PARAM_UCASTCIPHERS, v)) {
		printf("Unable to set pairwise key ciphers to 0x%x\n", v);
		return -1;
	}

	wpa_printf(MSG_DEBUG, "%s: key management algorithms=0x%x",
		   __func__, conf->wpa_key_mgmt);
	if (set80211param(drv, IEEE80211_PARAM_KEYMGTALGS, conf->wpa_key_mgmt)) {
		printf("Unable to set key management algorithms to 0x%x\n",
			conf->wpa_key_mgmt);
		return -1;
	}

	v = 0;
	if (conf->rsn_preauth)
		v |= BIT(0);
	wpa_printf(MSG_DEBUG, "%s: rsn capabilities=0x%x",
		   __func__, conf->rsn_preauth);
	if (set80211param(drv, IEEE80211_PARAM_RSNCAPS, v)) {
		printf("Unable to set RSN capabilities to 0x%x\n", v);
		return -1;
	}

	wpa_printf(MSG_DEBUG, "%s: enable WPA=0x%x", __func__, conf->wpa);
	if (set80211param(drv, IEEE80211_PARAM_WPA, conf->wpa)) {
		printf("Unable to set WPA to %u\n", conf->wpa);
		return -1;
	}
	return 0;
}


static int
madwifi_set_iface_flags(void *priv, int dev_up)
{
	struct madwifi_driver_data *drv = priv;
	struct ifreq ifr;

	wpa_printf(MSG_DEBUG, "%s: dev_up=%d", __func__, dev_up);

	if (drv->ioctl_sock < 0)
		return -1;

	memset(&ifr, 0, sizeof(ifr));
	os_strlcpy(ifr.ifr_name, drv->iface, IFNAMSIZ);

	if (ioctl(drv->ioctl_sock, SIOCGIFFLAGS, &ifr) != 0) {
		perror("ioctl[SIOCGIFFLAGS]");
		return -1;
	}

	if (dev_up)
		ifr.ifr_flags |= IFF_UP;
	else
		ifr.ifr_flags &= ~IFF_UP;

	if (ioctl(drv->ioctl_sock, SIOCSIFFLAGS, &ifr) != 0) {
		perror("ioctl[SIOCSIFFLAGS]");
		return -1;
	}

	if (dev_up) {
		memset(&ifr, 0, sizeof(ifr));
		os_strlcpy(ifr.ifr_name, drv->iface, IFNAMSIZ);
		ifr.ifr_mtu = HOSTAPD_MTU;
		if (ioctl(drv->ioctl_sock, SIOCSIFMTU, &ifr) != 0) {
			perror("ioctl[SIOCSIFMTU]");
			printf("Setting MTU failed - trying to survive with "
			       "current value\n");
		}
	}

	return 0;
}

static int
madwifi_set_ieee8021x(const char *ifname, void *priv, int enabled)
{
	struct madwifi_driver_data *drv = priv;
	struct hostapd_data *hapd = drv->hapd;
	struct hostapd_bss_config *conf = hapd->conf;

	wpa_printf(MSG_DEBUG, "%s: enabled=%d", __func__, enabled);

	if (!enabled) {
		/* XXX restore state */
		return set80211param(priv, IEEE80211_PARAM_AUTHMODE,
			IEEE80211_AUTH_AUTO);
	}
	if (!conf->wpa && !conf->ieee802_1x) {
		hostapd_logger(hapd, NULL, HOSTAPD_MODULE_DRIVER,
			HOSTAPD_LEVEL_WARNING, "No 802.1X or WPA enabled!");
		return -1;
	}
	if (conf->wpa && madwifi_configure_wpa(drv) != 0) {
		hostapd_logger(hapd, NULL, HOSTAPD_MODULE_DRIVER,
			HOSTAPD_LEVEL_WARNING, "Error configuring WPA state!");
		return -1;
	}
	if (set80211param(priv, IEEE80211_PARAM_AUTHMODE,
		(conf->wpa ?  IEEE80211_AUTH_WPA : IEEE80211_AUTH_8021X))) {
		hostapd_logger(hapd, NULL, HOSTAPD_MODULE_DRIVER,
			HOSTAPD_LEVEL_WARNING, "Error enabling WPA/802.1X!");
		return -1;
	}

	return 0;
}

static int
madwifi_set_privacy(const char *ifname, void *priv, int enabled)
{
	struct madwifi_driver_data *drv = priv;

	wpa_printf(MSG_DEBUG, "%s: enabled=%d", __func__, enabled);

	return set80211param(drv, IEEE80211_PARAM_PRIVACY, enabled);
}

static int
madwifi_set_sta_authorized(void *priv, const u8 *addr, int authorized)
{
	struct madwifi_driver_data *drv = priv;
	struct ieee80211req_mlme mlme;
	int ret;