driver_madwifi.c

hostapd源代码

/*
 * hostapd / Driver interaction with MADWIFI 802.11 driver
 * Copyright (c) 2004, Sam Leffler <[e-mail]>
 * Copyright (c) 2004, Video54 Technologies
 * Copyright (c) 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 <net/if.h>
#include <sys/ioctl.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 */

#include <net/if_arp.h>
#include "wireless_copy.h"

#include <netpacket/packet.h>

#include "hostapd.h"
#include "driver.h"
#include "ieee802_1x.h"
#include "eloop.h"
#include "priv_netlink.h"
#include "sta_info.h"
#include "l2_packet.h"
#include "hostap_common.h"

#include "eapol_sm.h"
#include "wpa.h"
#include "radius.h"
#include "ieee802_11.h"
#include "accounting.h"
#include "common.h"


struct madwifi_driver_data {
	struct driver_ops ops;			/* base class */
	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;
};

static const struct driver_ops madwifi_driver_ops;

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

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

	memset(&iwr, 0, sizeof(iwr));
	strncpy(iwr.ifr_name, drv->iface, IFNAMSIZ);
	if (len < IFNAMSIZ) {
		/*
		 * 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) {
#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_KICMAC]",
		};
#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[SIOCIWFIRSTPRIV+3]",
			"ioctl[IEEE80211_IOCTL_DELKEY]",
			"ioctl[SIOCIWFIRSTPRIV+5]",
			"ioctl[IEEE80211_IOCTL_SETMLME]",
			"ioctl[SIOCIWFIRSTPRIV+7]",
			"ioctl[IEEE80211_IOCTL_SETOPTIE]",
			"ioctl[IEEE80211_IOCTL_GETOPTIE]",
			"ioctl[IEEE80211_IOCTL_ADDMAC]",
			"ioctl[SIOCIWFIRSTPRIV+11]",
			"ioctl[IEEE80211_IOCTL_DELMAC]",
			"ioctl[SIOCIWFIRSTPRIV+13]",
			"ioctl[IEEE80211_IOCTL_CHANLIST]",
			"ioctl[SIOCIWFIRSTPRIV+15]",
			"ioctl[IEEE80211_IOCTL_GETRSN]",
			"ioctl[SIOCIWFIRSTPRIV+17]",
			"ioctl[IEEE80211_IOCTL_GETKEY]",
		};
#endif /* MADWIFI_NG */
		int idx = op - first;
		if (first <= op && op <= last &&
		    idx < sizeof(opnames) / sizeof(opnames[0]) && opnames[idx])
			perror(opnames[idx]);
		else
			perror("ioctl[unknown???]");
		return -1;
	}
	return 0;
}

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

	memset(&iwr, 0, sizeof(iwr));
	strncpy(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]");
		return -1;
	}
	return 0;
}

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;
}

/*
 * 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:
		printf("Unknown group key cipher %u\n",
			conf->wpa_group);
		return -1;
	}
	HOSTAPD_DEBUG(HOSTAPD_DEBUG_MINIMAL,
		"%s: group key cipher=%d\n", __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;
	HOSTAPD_DEBUG(HOSTAPD_DEBUG_MINIMAL,
		"%s: pairwise key ciphers=0x%x\n", __func__, v);
	if (set80211param(drv, IEEE80211_PARAM_UCASTCIPHERS, v)) {
		printf("Unable to set pairwise key ciphers to 0x%x\n", v);
		return -1;
	}

	HOSTAPD_DEBUG(HOSTAPD_DEBUG_MINIMAL,
		"%s: key management algorithms=0x%x\n",
		__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);
	HOSTAPD_DEBUG(HOSTAPD_DEBUG_MINIMAL,
		"%s: rsn capabilities=0x%x\n", __func__, conf->rsn_preauth);
	if (set80211param(drv, IEEE80211_PARAM_RSNCAPS, v)) {
		printf("Unable to set RSN capabilities to 0x%x\n", v);
		return -1;
	}

	HOSTAPD_DEBUG(HOSTAPD_DEBUG_MINIMAL,
		"%s: enable WPA= 0x%x\n", __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 hostapd_data *hapd = drv->hapd;
	struct ifreq ifr;

	HOSTAPD_DEBUG(HOSTAPD_DEBUG_VERBOSE,
		"%s: dev_up=%d\n", __func__, dev_up);

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

	memset(&ifr, 0, sizeof(ifr));
	snprintf(ifr.ifr_name, IFNAMSIZ, "%s", drv->iface);

	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));
		snprintf(ifr.ifr_name, IFNAMSIZ, "%s", drv->iface);
		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;

	HOSTAPD_DEBUG(HOSTAPD_DEBUG_VERBOSE,
		"%s: enabled=%d\n", __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 madwifi_set_iface_flags(priv, 1);
}

static int
madwifi_set_privacy(void *priv, int enabled)
{
	struct madwifi_driver_data *drv = priv;
	struct hostapd_data *hapd = drv->hapd;

	HOSTAPD_DEBUG(HOSTAPD_DEBUG_MINIMAL,
		"%s: enabled=%d\n", __func__, enabled);

	return set80211param(priv, IEEE80211_PARAM_PRIVACY, enabled);
}

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

	HOSTAPD_DEBUG(HOSTAPD_DEBUG_VERBOSE,
		"%s: addr=%s authorized=%d\n",
		__func__, ether_sprintf(addr), authorized);

	if (authorized)
		mlme.im_op = IEEE80211_MLME_AUTHORIZE;
	else
		mlme.im_op = IEEE80211_MLME_UNAUTHORIZE;
	mlme.im_reason = 0;
	memcpy(mlme.im_macaddr, addr, IEEE80211_ADDR_LEN);
	return set80211priv(priv, IEEE80211_IOCTL_SETMLME, &mlme,
			    sizeof(mlme));
}

static int
madwifi_sta_set_flags(void *priv, const u8 *addr, int flags_or, int flags_and)
{
	/* For now, only support setting Authorized flag */
	if (flags_or & WLAN_STA_AUTHORIZED)
		return madwifi_set_sta_authorized(priv, addr, 1);
	if (flags_and & WLAN_STA_AUTHORIZED)
		return madwifi_set_sta_authorized(priv, addr, 0);
	return 0;
}

static int
madwifi_del_key(void *priv, const u8 *addr, int key_idx)
{
	struct madwifi_driver_data *drv = priv;
	struct hostapd_data *hapd = drv->hapd;
	struct ieee80211req_del_key wk;

	HOSTAPD_DEBUG(HOSTAPD_DEBUG_MINIMAL,
		"%s: addr=%s key_idx=%d\n",
		__func__, ether_sprintf(addr), key_idx);

	memset(&wk, 0, sizeof(wk));
	if (addr != NULL) {
		memcpy(wk.idk_macaddr, addr, IEEE80211_ADDR_LEN);
		wk.idk_keyix = (u8) IEEE80211_KEYIX_NONE;
	} else {
		wk.idk_keyix = key_idx;
	}

	return set80211priv(priv, IEEE80211_IOCTL_DELKEY, &wk, sizeof(wk));
}

static int
madwifi_set_key(const char *ifname, void *priv, const char *alg,
		const u8 *addr, int key_idx,
		const u8 *key, size_t key_len, int txkey)
{