driver_atheros.c

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/*
 * hostapd / Driver interaction with Atheros driver
 * Copyright (c) 2004, Sam Leffler <sam@errno.com>
 * Copyright (c) 2004, Video54 Technologies
 * Copyright (c) 2005-2007, Jouni Malinen <j@w1.fi>
 * 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 */

/*
 * 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 "os/linux/include/ieee80211_external.h"


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

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

#include "wireless_copy.h"

#include "driver.h"
#include "eloop.h"
#include "priv_netlink.h"
#include "l2_packet/l2_packet.h"
#include "common/ieee802_11_defs.h"
#include "netlink.h"
#include "linux_ioctl.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 */
        struct netlink_data *netlink;
        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 *own_addr, const u8 *addr,
                              int reason_code);

static const char * athr_get_ioctl_name(int op)
{
        switch (op) {
        case IEEE80211_IOCTL_SETPARAM:
                return "SETPARAM";
        case IEEE80211_IOCTL_GETPARAM:
                return "GETPARAM";
        case IEEE80211_IOCTL_SETKEY:
                return "SETKEY";
        case IEEE80211_IOCTL_SETWMMPARAMS:
                return "SETWMMPARAMS";
        case IEEE80211_IOCTL_DELKEY:
                return "DELKEY";
        case IEEE80211_IOCTL_GETWMMPARAMS:
                return "GETWMMPARAMS";
        case IEEE80211_IOCTL_SETMLME:
                return "SETMLME";
        case IEEE80211_IOCTL_GETCHANINFO:
                return "GETCHANINFO";
        case IEEE80211_IOCTL_SETOPTIE:
                return "SETOPTIE";
        case IEEE80211_IOCTL_GETOPTIE:
                return "GETOPTIE";
        case IEEE80211_IOCTL_ADDMAC:
                return "ADDMAC";
        case IEEE80211_IOCTL_DELMAC:
                return "DELMAC";
        case IEEE80211_IOCTL_GETCHANLIST:
                return "GETCHANLIST";
        case IEEE80211_IOCTL_SETCHANLIST:
                return "SETCHANLIST";
        case IEEE80211_IOCTL_KICKMAC:
                return "KICKMAC";
        case IEEE80211_IOCTL_CHANSWITCH:
                return "CHANSWITCH";
        case IEEE80211_IOCTL_GETMODE:
                return "GETMODE";
        case IEEE80211_IOCTL_SETMODE:
                return "SETMODE";
        case IEEE80211_IOCTL_GET_APPIEBUF:
                return "GET_APPIEBUF";
        case IEEE80211_IOCTL_SET_APPIEBUF:
                return "SET_APPIEBUF";
        case IEEE80211_IOCTL_SET_ACPARAMS:
                return "SET_ACPARAMS";
        case IEEE80211_IOCTL_FILTERFRAME:
                return "FILTERFRAME";
        case IEEE80211_IOCTL_SET_RTPARAMS:
                return "SET_RTPARAMS";
        case IEEE80211_IOCTL_SENDADDBA:
                return "SENDADDBA";
        case IEEE80211_IOCTL_GETADDBASTATUS:
                return "GETADDBASTATUS";
        case IEEE80211_IOCTL_SENDDELBA:
                return "SENDDELBA";
        case IEEE80211_IOCTL_SET_MEDENYENTRY:
                return "SET_MEDENYENTRY";
        case IEEE80211_IOCTL_SET_ADDBARESP:
                return "SET_ADDBARESP";
        case IEEE80211_IOCTL_GET_MACADDR:
                return "GET_MACADDR";
        case IEEE80211_IOCTL_SET_HBRPARAMS:
                return "SET_HBRPARAMS";
        case IEEE80211_IOCTL_SET_RXTIMEOUT:
                return "SET_RXTIMEOUT";
        case IEEE80211_IOCTL_STA_STATS:
                return "STA_STATS";
        case IEEE80211_IOCTL_GETWPAIE:
                return "GETWPAIE";
        default:
                return "??";
        }
}


static const char * athr_get_param_name(int op)
{
        switch (op) {
        case IEEE80211_IOC_MCASTCIPHER:
                return "MCASTCIPHER";
        case IEEE80211_PARAM_MCASTKEYLEN:
                return "MCASTKEYLEN";
        case IEEE80211_PARAM_UCASTCIPHERS:
                return "UCASTCIPHERS";
        case IEEE80211_PARAM_KEYMGTALGS:
                return "KEYMGTALGS";
        case IEEE80211_PARAM_RSNCAPS:
                return "RSNCAPS";
        case IEEE80211_PARAM_WPA:
                return "WPA";
        case IEEE80211_PARAM_AUTHMODE:
                return "AUTHMODE";
        case IEEE80211_PARAM_PRIVACY:
                return "PRIVACY";
        case IEEE80211_PARAM_COUNTERMEASURES:
                return "COUNTERMEASURES";
        default:
                return "??";
        }
}


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) {
                wpa_printf(MSG_DEBUG, "atheros: %s: %s: ioctl op=0x%x "
                           "(%s) len=%d failed: %d (%s)",
                           __func__, drv->iface, op,
                           athr_get_ioctl_name(op),
                           len, errno, strerror(errno));
                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: %s: Failed to set parameter (op %d "
                           "(%s) arg %d)", __func__, drv->iface, op,
                           athr_get_param_name(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 wpa_bss_params *params)
{
        int v;

        switch (params->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",
                           params->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 = (params->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 (params->wpa_pairwise & WPA_CIPHER_CCMP)
                v |= 1<<IEEE80211_CIPHER_AES_CCM;
        if (params->wpa_pairwise & WPA_CIPHER_TKIP)
                v |= 1<<IEEE80211_CIPHER_TKIP;
        if (params->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__, params->wpa_key_mgmt);
        if (set80211param(drv, IEEE80211_PARAM_KEYMGTALGS,
                          params->wpa_key_mgmt)) {
                printf("Unable to set key management algorithms to 0x%x\n",
                        params->wpa_key_mgmt);
                return -1;
        }

        v = 0;
        if (params->rsn_preauth)
                v |= BIT(0);
        wpa_printf(MSG_DEBUG, "%s: rsn capabilities=0x%x",
                   __func__, params->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__, params->wpa);
        if (set80211param(drv, IEEE80211_PARAM_WPA, params->wpa)) {
                printf("Unable to set WPA to %u\n", params->wpa);
                return -1;
        }
        return 0;
}

static int
madwifi_set_ieee8021x(void *priv, struct wpa_bss_params *params)
{
        struct madwifi_driver_data *drv = priv;

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

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

        return 0;
}

static int
madwifi_set_privacy(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;

        wpa_printf(MSG_DEBUG, "%s: addr=%s authorized=%d",
                   __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);
        ret = set80211priv(drv, IEEE80211_IOCTL_SETMLME, &mlme, sizeof(mlme));
        if (ret < 0) {
                wpa_printf(MSG_DEBUG, "%s: Failed to %sauthorize STA " MACSTR,
                           __func__, authorized ? "" : "un", MAC2STR(addr));
        }

        return ret;
}

static int
madwifi_sta_set_flags(void *priv, const u8 *addr,
                      int total_flags, int flags_or, int flags_and)
{
        /* For now, only support setting Authorized flag */
        if (flags_or & WPA_STA_AUTHORIZED)
                return madwifi_set_sta_authorized(priv, addr, 1);
        if (!(flags_and & WPA_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 ieee80211req_del_key wk;
        int ret;

        wpa_printf(MSG_DEBUG, "%s: addr=%s key_idx=%d",
                   __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;
        }

        ret = set80211priv(drv, IEEE80211_IOCTL_DELKEY, &wk, sizeof(wk));
        if (ret < 0) {
                wpa_printf(MSG_DEBUG, "%s: Failed to delete key (addr %s"
                           " key_idx %d)", __func__, ether_sprintf(addr),
                           key_idx);
        }

        return ret;
}

static int
madwifi_set_key(const char *ifname, void *priv, enum 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 madwifi_driver_data *drv = priv;
        struct ieee80211req_key wk;
        u_int8_t cipher;
        int ret;

        if (alg == WPA_ALG_NONE)
                return madwifi_del_key(drv, addr, key_idx);

        wpa_printf(MSG_DEBUG, "%s: alg=%d addr=%s key_idx=%d",
                   __func__, alg, ether_sprintf(addr), key_idx);

        switch (alg) {
        case WPA_ALG_WEP:
                cipher = IEEE80211_CIPHER_WEP;
                break;
        case WPA_ALG_TKIP:
                cipher = IEEE80211_CIPHER_TKIP;
                break;
        case WPA_ALG_CCMP:
                cipher = IEEE80211_CIPHER_AES_CCM;
                break;
        default:
                printf("%s: unknown/unsupported algorithm %d\n",
                        __func__, alg);
                return -1;
        }

        if (key_len > sizeof(wk.ik_keydata)) {
                printf("%s: key length %lu too big\n", __func__,
                       (unsigned long) key_len);
                return -3;
        }

        memset(&wk, 0, sizeof(wk));
        wk.ik_type = cipher;
        wk.ik_flags = IEEE80211_KEY_RECV | IEEE80211_KEY_XMIT;
        if (addr == NULL) {
                memset(wk.ik_macaddr, 0xff, IEEE80211_ADDR_LEN);
                wk.ik_keyix = key_idx;
                wk.ik_flags |= IEEE80211_KEY_DEFAULT;
        } else {
                memcpy(wk.ik_macaddr, addr, IEEE80211_ADDR_LEN);
                wk.ik_keyix = IEEE80211_KEYIX_NONE;
        }
        wk.ik_keylen = key_len;
        memcpy(wk.ik_keydata, key, key_len);

        ret = set80211priv(drv, IEEE80211_IOCTL_SETKEY, &wk, sizeof(wk));
        if (ret < 0) {
                wpa_printf(MSG_DEBUG, "%s: Failed to set key (addr %s"
                           " key_idx %d alg %d key_len %lu set_tx %d)",
                           __func__, ether_sprintf(wk.ik_macaddr), key_idx,
                           alg, (unsigned long) key_len, set_tx);
        }

        return ret;
}


static int
madwifi_get_seqnum(const char *ifname, void *priv, const u8 *addr, int idx,
                   u8 *seq)
{
        struct madwifi_driver_data *drv = priv;
        struct ieee80211req_key wk;

        wpa_printf(MSG_DEBUG, "%s: addr=%s idx=%d",
                   __func__, ether_sprintf(addr), idx);

        memset(&wk, 0, sizeof(wk));
        if (addr == NULL)
                memset(wk.ik_macaddr, 0xff, IEEE80211_ADDR_LEN);
        else
                memcpy(wk.ik_macaddr, addr, IEEE80211_ADDR_LEN);
        wk.ik_keyix = idx;

        if (set80211priv(drv, IEEE80211_IOCTL_GETKEY, &wk, sizeof(wk))) {
                wpa_printf(MSG_DEBUG, "%s: Failed to get encryption data "
                           "(addr " MACSTR " key_idx %d)",
                           __func__, MAC2STR(wk.ik_macaddr), idx);
                return -1;
        }

#ifdef WORDS_BIGENDIAN
        {
                /*
                 * wk.ik_keytsc is in host byte order (big endian), need to
                 * swap it to match with the byte order used in WPA.
                 */
                int i;
#ifndef WPA_KEY_RSC_LEN
#define WPA_KEY_RSC_LEN 8
#endif
                u8 tmp[WPA_KEY_RSC_LEN];
                memcpy(tmp, &wk.ik_keytsc, sizeof(wk.ik_keytsc));
                for (i = 0; i < WPA_KEY_RSC_LEN; i++) {
                        seq[i] = tmp[WPA_KEY_RSC_LEN - i - 1];
                }
        }
#else /* WORDS_BIGENDIAN */
        memcpy(seq, &wk.ik_keytsc, sizeof(wk.ik_keytsc));
#endif /* WORDS_BIGENDIAN */
        return 0;
}


static int
madwifi_flush(void *priv)
{
        u8 allsta[IEEE80211_ADDR_LEN];
        memset(allsta, 0xff, IEEE80211_ADDR_LEN);
        return madwifi_sta_deauth(priv, NULL, allsta,
                                  IEEE80211_REASON_AUTH_LEAVE);
}


static int
madwifi_read_sta_driver_data(void *priv, struct hostap_sta_driver_data *data,
                             const u8 *addr)
{
        struct madwifi_driver_data *drv = priv;
        struct ieee80211req_sta_stats stats;

        memset(data, 0, sizeof(*data));

        /*
         * Fetch statistics for station from the system.
         */
        memset(&stats, 0, sizeof(stats));
        memcpy(stats.is_u.macaddr, addr, IEEE80211_ADDR_LEN);
        if (set80211priv(drv, IEEE80211_IOCTL_STA_STATS,
                         &stats, sizeof(stats))) {
                wpa_printf(MSG_DEBUG, "%s: Failed to fetch STA stats (addr "
                           MACSTR ")", __func__, MAC2STR(addr));
                if (memcmp(addr, drv->acct_mac, ETH_ALEN) == 0) {
                        memcpy(data, &drv->acct_data, sizeof(*data));
                        return 0;
                }

                printf("Failed to get station stats information element.\n");
                return -1;
        }

        data->rx_packets = stats.is_stats.ns_rx_data;
        data->rx_bytes = stats.is_stats.ns_rx_bytes;
        data->tx_packets = stats.is_stats.ns_tx_data;
        data->tx_bytes = stats.is_stats.ns_tx_bytes;
        return 0;
}


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

        wpa_printf(MSG_DEBUG, "%s: addr=%s", __func__, ether_sprintf(addr));

        mlme.im_op = IEEE80211_MLME_CLEAR_STATS;
        memcpy(mlme.im_macaddr, addr, IEEE80211_ADDR_LEN);
        ret = set80211priv(drv, IEEE80211_IOCTL_SETMLME, &mlme,
                           sizeof(mlme));
        if (ret < 0) {
                wpa_printf(MSG_DEBUG, "%s: Failed to clear STA stats (addr "
                           MACSTR ")", __func__, MAC2STR(addr));
        }

        return ret;
}


static int
madwifi_set_opt_ie(void *priv, const u8 *ie, size_t ie_len)
{
        /*
         * Do nothing; we setup parameters at startup that define the
         * contents of the beacon information element.
         */
        return 0;
}

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

        wpa_printf(MSG_DEBUG, "%s: addr=%s reason_code=%d",
                   __func__, ether_sprintf(addr), reason_code);

        mlme.im_op = IEEE80211_MLME_DEAUTH;
        mlme.im_reason = reason_code;
        memcpy(mlme.im_macaddr, addr, IEEE80211_ADDR_LEN);
        ret = set80211priv(drv, IEEE80211_IOCTL_SETMLME, &mlme, sizeof(mlme));
        if (ret < 0) {
                wpa_printf(MSG_DEBUG, "%s: Failed to deauth STA (addr " MACSTR
                           " reason %d)",
                           __func__, MAC2STR(addr), reason_code);
        }

        return ret;
}

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

        wpa_printf(MSG_DEBUG, "%s: addr=%s reason_code=%d",
                   __func__, ether_sprintf(addr), reason_code);

        mlme.im_op = IEEE80211_MLME_DISASSOC;
        mlme.im_reason = reason_code;
        memcpy(mlme.im_macaddr, addr, IEEE80211_ADDR_LEN);
        ret = set80211priv(drv, IEEE80211_IOCTL_SETMLME, &mlme, sizeof(mlme));
        if (ret < 0) {
                wpa_printf(MSG_DEBUG, "%s: Failed to disassoc STA (addr "
                           MACSTR " reason %d)",
                           __func__, MAC2STR(addr), reason_code);
        }

        return ret;
}

#ifdef CONFIG_WPS
static void madwifi_raw_receive(void *ctx, const u8 *src_addr, const u8 *buf,
                                size_t len)
{
        struct madwifi_driver_data *drv = ctx;
        const struct ieee80211_mgmt *mgmt;
        u16 fc;
        union wpa_event_data event;

        /* Send Probe Request information to WPS processing */

        if (len < IEEE80211_HDRLEN + sizeof(mgmt->u.probe_req))
                return;
        mgmt = (const struct ieee80211_mgmt *) buf;

        fc = le_to_host16(mgmt->frame_control);
        if (WLAN_FC_GET_TYPE(fc) != WLAN_FC_TYPE_MGMT ||
            WLAN_FC_GET_STYPE(fc) != WLAN_FC_STYPE_PROBE_REQ)
                return;

        os_memset(&event, 0, sizeof(event));
        event.rx_probe_req.sa = mgmt->sa;
        event.rx_probe_req.ie = mgmt->u.probe_req.variable;
        event.rx_probe_req.ie_len =
                len - (IEEE80211_HDRLEN + sizeof(mgmt->u.probe_req));
        wpa_supplicant_event(drv->hapd, EVENT_RX_PROBE_REQ, &event);
}
#endif /* CONFIG_WPS */

static int madwifi_receive_probe_req(struct madwifi_driver_data *drv)
{
        int ret = 0;
#ifdef CONFIG_WPS
        struct ieee80211req_set_filter filt;

        wpa_printf(MSG_DEBUG, "%s Enter", __func__);
        filt.app_filterype = IEEE80211_FILTER_TYPE_PROBE_REQ;

        ret = set80211priv(drv, IEEE80211_IOCTL_FILTERFRAME, &filt,
                           sizeof(struct ieee80211req_set_filter));
        if (ret)
                return ret;

        drv->sock_raw = l2_packet_init(drv->iface, NULL, ETH_P_80211_RAW,
                                       madwifi_raw_receive, drv, 1);
        if (drv->sock_raw == NULL)
                return -1;
#endif /* CONFIG_WPS */
        return ret;
}

#ifdef CONFIG_WPS
static int
madwifi_set_wps_ie(void *priv, const u8 *ie, size_t len, u32 frametype)
{
        struct madwifi_driver_data *drv = priv;
        u8 buf[256];
        struct ieee80211req_getset_appiebuf *beac_ie;

        wpa_printf(MSG_DEBUG, "%s buflen = %lu", __func__,
                   (unsigned long) len);

        beac_ie = (struct ieee80211req_getset_appiebuf *) buf;
        beac_ie->app_frmtype = frametype;
        beac_ie->app_buflen = len;
        memcpy(&(beac_ie->app_buf[0]), ie, len);

        return set80211priv(drv, IEEE80211_IOCTL_SET_APPIEBUF, beac_ie,
                            sizeof(struct ieee80211req_getset_appiebuf) + len);
}

static int
madwifi_set_ap_wps_ie(void *priv, const struct wpabuf *beacon,
                      const struct wpabuf *proberesp)
{
        if (madwifi_set_wps_ie(priv, beacon ? wpabuf_head(beacon) : NULL,
                               beacon ? wpabuf_len(beacon) : 0,
                               IEEE80211_APPIE_FRAME_BEACON))
                return -1;
        return madwifi_set_wps_ie(priv,
                                  proberesp ? wpabuf_head(proberesp) : NULL,
                                  proberesp ? wpabuf_len(proberesp): 0,
                                  IEEE80211_APPIE_FRAME_PROBE_RESP);
}
#else /* CONFIG_WPS */
#define madwifi_set_ap_wps_ie NULL
#endif /* CONFIG_WPS */

static void
madwifi_new_sta(struct madwifi_driver_data *drv, u8 addr[IEEE80211_ADDR_LEN])
{
        struct hostapd_data *hapd = drv->hapd;
        struct ieee80211req_wpaie ie;
        int ielen = 0;
        u8 *iebuf = NULL;

        /*
         * Fetch negotiated WPA/RSN parameters from the system.
         */
        memset(&ie, 0, sizeof(ie));
        memcpy(ie.wpa_macaddr, addr, IEEE80211_ADDR_LEN);
        if (set80211priv(drv, IEEE80211_IOCTL_GETWPAIE, &ie, sizeof(ie))) {
                /*
                 * See ATH_WPS_IE comment in the beginning of the file for a
                 * possible cause for the failure..
                 */
                wpa_printf(MSG_DEBUG, "%s: Failed to get WPA/RSN IE: %s",
                           __func__, strerror(errno));
                goto no_ie;
        }
        wpa_hexdump(MSG_MSGDUMP, "madwifi req WPA IE",
                    ie.wpa_ie, IEEE80211_MAX_OPT_IE);
        wpa_hexdump(MSG_MSGDUMP, "madwifi req RSN IE",
                    ie.rsn_ie, IEEE80211_MAX_OPT_IE);
        iebuf = ie.wpa_ie;
        /* madwifi seems to return some random data if WPA/RSN IE is not set.
         * Assume the IE was not included if the IE type is unknown. */
        if (iebuf[0] != WLAN_EID_VENDOR_SPECIFIC)
                iebuf[1] = 0;
        if (iebuf[1] == 0 && ie.rsn_ie[1] > 0) {
                /* madwifi-ng svn #1453 added rsn_ie. Use it, if wpa_ie was not
                 * set. This is needed for WPA2. */
                iebuf = ie.rsn_ie;
                if (iebuf[0] != WLAN_EID_RSN)
                        iebuf[1] = 0;
        }

        ielen = iebuf[1];
        if (ielen == 0)
                iebuf = NULL;
        else
                ielen += 2;

no_ie:
        drv_event_assoc(hapd, addr, iebuf, ielen);

        if (memcmp(addr, drv->acct_mac, ETH_ALEN) == 0) {
                /* Cached accounting data is not valid anymore. */
                memset(drv->acct_mac, 0, ETH_ALEN);
                memset(&drv->acct_data, 0, sizeof(drv->acct_data));
        }
}

static void
madwifi_wireless_event_wireless_custom(struct madwifi_driver_data *drv,
                                       char *custom, char *end)
{
        wpa_printf(MSG_DEBUG, "Custom wireless event: '%s'", custom);

        if (strncmp(custom, "MLME-MICHAELMICFAILURE.indication", 33) == 0) {
                char *pos;
                u8 addr[ETH_ALEN];
                pos = strstr(custom, "addr=");
                if (pos == NULL) {
                        wpa_printf(MSG_DEBUG,
                                   "MLME-MICHAELMICFAILURE.indication "
                                   "without sender address ignored");
                        return;
                }
                pos += 5;
                if (hwaddr_aton(pos, addr) == 0) {
                        union wpa_event_data data;
                        os_memset(&data, 0, sizeof(data));
                        data.michael_mic_failure.unicast = 1;
                        data.michael_mic_failure.src = addr;
                        wpa_supplicant_event(drv->hapd,
                                             EVENT_MICHAEL_MIC_FAILURE, &data);
                } else {
                        wpa_printf(MSG_DEBUG,
                                   "MLME-MICHAELMICFAILURE.indication "
                                   "with invalid MAC address");
                }
        } else if (strncmp(custom, "STA-TRAFFIC-STAT", 16) == 0) {
                char *key, *value;
                u32 val;
                key = custom;
                while ((key = strchr(key, '\n')) != NULL) {
                        key++;
                        value = strchr(key, '=');
                        if (value == NULL)
                                continue;
                        *value++ = '\0';
                        val = strtoul(value, NULL, 10);
                        if (strcmp(key, "mac") == 0)
                                hwaddr_aton(value, drv->acct_mac);
                        else if (strcmp(key, "rx_packets") == 0)
                                drv->acct_data.rx_packets = val;
                        else if (strcmp(key, "tx_packets") == 0)
                                drv->acct_data.tx_packets = val;
                        else if (strcmp(key, "rx_bytes") == 0)
                                drv->acct_data.rx_bytes = val;
                        else if (strcmp(key, "tx_bytes") == 0)
                                drv->acct_data.tx_bytes = val;
                        key = value;
                }
#ifdef CONFIG_WPS
        } else if (strncmp(custom, "PUSH-BUTTON.indication", 22) == 0) {
                /* Some atheros kernels send push button as a wireless event */
                /* PROBLEM! this event is received for ALL BSSs ...
                 * so all are enabled for WPS... ugh.
                 */
                wpa_supplicant_event(drv->hapd, EVENT_WPS_BUTTON_PUSHED, NULL);
        } else if (strncmp(custom, "Manage.prob_req ", 16) == 0) {
                /*
                 * Atheros driver uses a hack to pass Probe Request frames as a
                 * binary data in the custom wireless event. The old way (using
                 * packet sniffing) didn't work when bridging.
                 * Format: "Manage.prob_req <frame len>" | zero padding | frame
                 */
#define WPS_FRAM_TAG_SIZE 30 /* hardcoded in driver */
                int len = atoi(custom + 16);
                if (len < 0 || custom + WPS_FRAM_TAG_SIZE + len > end) {
                        wpa_printf(MSG_DEBUG, "Invalid Manage.prob_req event "
                                   "length %d", len);
                        return;
                }
                madwifi_raw_receive(drv, NULL,
                                    (u8 *) custom + WPS_FRAM_TAG_SIZE, len);
#endif /* CONFIG_WPS */
        }
}

static void
madwifi_wireless_event_wireless(struct madwifi_driver_data *drv,
                                char *data, int len)
{
        struct iw_event iwe_buf, *iwe = &iwe_buf;
        char *pos, *end, *custom, *buf;

        pos = data;
        end = data + len;

        while (pos + IW_EV_LCP_LEN <= end) {
                /* Event data may be unaligned, so make a local, aligned copy
                 * before processing. */
                memcpy(&iwe_buf, pos, IW_EV_LCP_LEN);
                wpa_printf(MSG_MSGDUMP, "Wireless event: cmd=0x%x len=%d",
                           iwe->cmd, iwe->len);
                if (iwe->len <= IW_EV_LCP_LEN)
                        return;

                custom = pos + IW_EV_POINT_LEN;
                if (drv->we_version > 18 &&
                    (iwe->cmd == IWEVMICHAELMICFAILURE ||
                     iwe->cmd == IWEVASSOCREQIE ||
                     iwe->cmd == IWEVCUSTOM)) {
                        /* WE-19 removed the pointer from struct iw_point */
                        char *dpos = (char *) &iwe_buf.u.data.length;
                        int dlen = dpos - (char *) &iwe_buf;
                        memcpy(dpos, pos + IW_EV_LCP_LEN,
                               sizeof(struct iw_event) - dlen);
                } else {
                        memcpy(&iwe_buf, pos, sizeof(struct iw_event));
                        custom += IW_EV_POINT_OFF;
                }

                switch (iwe->cmd) {
                case IWEVEXPIRED:
                        drv_event_disassoc(drv->hapd,
                                           (u8 *) iwe->u.addr.sa_data);
                        break;
                case IWEVREGISTERED:
                        madwifi_new_sta(drv, (u8 *) iwe->u.addr.sa_data);
                        break;
                case IWEVASSOCREQIE:
                        /* Driver hack.. Use IWEVASSOCREQIE to bypass
                         * IWEVCUSTOM size limitations. Need to handle this
                         * just like IWEVCUSTOM.
                         */
                case IWEVCUSTOM:
                        if (custom + iwe->u.data.length > end)
                                return;
                        buf = malloc(iwe->u.data.length + 1);
                        if (buf == NULL)
                                return;         /* XXX */
                        memcpy(buf, custom, iwe->u.data.length);
                        buf[iwe->u.data.length] = '\0';
                        madwifi_wireless_event_wireless_custom(
                                drv, buf, buf + iwe->u.data.length);
                        free(buf);
                        break;
                }

                pos += iwe->len;
        }
}


static void
madwifi_wireless_event_rtm_newlink(void *ctx,
                                   struct ifinfomsg *ifi, u8 *buf, size_t len)
{
        struct madwifi_driver_data *drv = ctx;
        int attrlen, rta_len;
        struct rtattr *attr;

        if (ifi->ifi_index != drv->ifindex)
                return;

        attrlen = len;
        attr = (struct rtattr *) buf;

        rta_len = RTA_ALIGN(sizeof(struct rtattr));
        while (RTA_OK(attr, attrlen)) {
                if (attr->rta_type == IFLA_WIRELESS) {
                        madwifi_wireless_event_wireless(
                                drv, ((char *) attr) + rta_len,
                                attr->rta_len - rta_len);
                }
                attr = RTA_NEXT(attr, attrlen);
        }
}


static int
madwifi_get_we_version(struct madwifi_driver_data *drv)
{
        struct iw_range *range;
        struct iwreq iwr;
        int minlen;
        size_t buflen;

        drv->we_version = 0;

        /*
         * Use larger buffer than struct iw_range in order to allow the
         * structure to grow in the future.
         */
        buflen = sizeof(struct iw_range) + 500;
        range = os_zalloc(buflen);
        if (range == NULL)
                return -1;

        memset(&iwr, 0, sizeof(iwr));
        os_strlcpy(iwr.ifr_name, drv->iface, IFNAMSIZ);
        iwr.u.data.pointer = (caddr_t) range;
        iwr.u.data.length = buflen;

        minlen = ((char *) &range->enc_capa) - (char *) range +
                sizeof(range->enc_capa);

        if (ioctl(drv->ioctl_sock, SIOCGIWRANGE, &iwr) < 0) {
                perror("ioctl[SIOCGIWRANGE]");
                free(range);
                return -1;
        } else if (iwr.u.data.length >= minlen &&
                   range->we_version_compiled >= 18) {
                wpa_printf(MSG_DEBUG, "SIOCGIWRANGE: WE(compiled)=%d "
                           "WE(source)=%d enc_capa=0x%x",
                           range->we_version_compiled,
                           range->we_version_source,
                           range->enc_capa);
                drv->we_version = range->we_version_compiled;
        }

        free(range);
        return 0;
}


static int
madwifi_wireless_event_init(struct madwifi_driver_data *drv)
{
        struct netlink_config *cfg;

        madwifi_get_we_version(drv);

        cfg = os_zalloc(sizeof(*cfg));
        if (cfg == NULL)
                return -1;
        cfg->ctx = drv;
        cfg->newlink_cb = madwifi_wireless_event_rtm_newlink;
        drv->netlink = netlink_init(cfg);
        if (drv->netlink == NULL) {
                os_free(cfg);
                return -1;
        }

        return 0;
}


static int
madwifi_send_eapol(void *priv, const u8 *addr, const u8 *data, size_t data_len,
                   int encrypt, const u8 *own_addr)
{
        struct madwifi_driver_data *drv = priv;
        unsigned char buf[3000];
        unsigned char *bp = buf;
        struct l2_ethhdr *eth;
        size_t len;
        int status;

        /*
         * Prepend the Ethernet header.  If the caller left us
         * space at the front we could just insert it but since
         * we don't know we copy to a local buffer.  Given the frequency
         * and size of frames this probably doesn't matter.
         */
        len = data_len + sizeof(struct l2_ethhdr);
        if (len > sizeof(buf)) {
                bp = malloc(len);
                if (bp == NULL) {
                        printf("EAPOL frame discarded, cannot malloc temp "
                               "buffer of size %lu!\n", (unsigned long) len);
                        return -1;
                }
        }
        eth = (struct l2_ethhdr *) bp;
        memcpy(eth->h_dest, addr, ETH_ALEN);
        memcpy(eth->h_source, own_addr, ETH_ALEN);
        eth->h_proto = host_to_be16(ETH_P_EAPOL);
        memcpy(eth+1, data, data_len);

        wpa_hexdump(MSG_MSGDUMP, "TX EAPOL", bp, len);

        status = l2_packet_send(drv->sock_xmit, addr, ETH_P_EAPOL, bp, len);

        if (bp != buf)
                free(bp);
        return status;
}

static void
handle_read(void *ctx, const u8 *src_addr, const u8 *buf, size_t len)
{
        struct madwifi_driver_data *drv = ctx;
        drv_event_eapol_rx(drv->hapd, src_addr, buf + sizeof(struct l2_ethhdr),
                           len - sizeof(struct l2_ethhdr));
}

static void *
madwifi_init(struct hostapd_data *hapd, struct wpa_init_params *params)
{
        struct madwifi_driver_data *drv;
        struct ifreq ifr;
        struct iwreq iwr;
        char brname[IFNAMSIZ];

        drv = os_zalloc(sizeof(struct madwifi_driver_data));
        if (drv == NULL) {
                printf("Could not allocate memory for madwifi driver data\n");
                return NULL;
        }

        drv->hapd = hapd;
        drv->ioctl_sock = socket(PF_INET, SOCK_DGRAM, 0);
        if (drv->ioctl_sock < 0) {
                perror("socket[PF_INET,SOCK_DGRAM]");
                goto bad;
        }
        memcpy(drv->iface, params->ifname, sizeof(drv->iface));

        memset(&ifr, 0, sizeof(ifr));
        os_strlcpy(ifr.ifr_name, drv->iface, sizeof(ifr.ifr_name));
        if (ioctl(drv->ioctl_sock, SIOCGIFINDEX, &ifr) != 0) {
                perror("ioctl(SIOCGIFINDEX)");
                goto bad;
        }
        drv->ifindex = ifr.ifr_ifindex;

        drv->sock_xmit = l2_packet_init(drv->iface, NULL, ETH_P_EAPOL,
                                        handle_read, drv, 1);
        if (drv->sock_xmit == NULL)
                goto bad;
        if (l2_packet_get_own_addr(drv->sock_xmit, params->own_addr))
                goto bad;
        if (params->bridge[0]) {
                wpa_printf(MSG_DEBUG, "Configure bridge %s for EAPOL traffic.",
                           params->bridge[0]);
                drv->sock_recv = l2_packet_init(params->bridge[0], NULL,
                                                ETH_P_EAPOL, handle_read, drv,
                                                1);
                if (drv->sock_recv == NULL)
                        goto bad;
        } else if (linux_br_get(brname, drv->iface) == 0) {
                wpa_printf(MSG_DEBUG, "Interface in bridge %s; configure for "
                           "EAPOL receive", brname);
                drv->sock_recv = l2_packet_init(brname, NULL, ETH_P_EAPOL,
                                                handle_read, drv, 1);
                if (drv->sock_recv == NULL)
                        goto bad;
        } else
                drv->sock_recv = drv->sock_xmit;

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

        iwr.u.mode = IW_MODE_MASTER;

        if (ioctl(drv->ioctl_sock, SIOCSIWMODE, &iwr) < 0) {
                perror("ioctl[SIOCSIWMODE]");
                printf("Could not set interface to master mode!\n");
                goto bad;
        }

        /* mark down during setup */
        linux_set_iface_flags(drv->ioctl_sock, drv->iface, 0);
        madwifi_set_privacy(drv, 0); /* default to no privacy */

        madwifi_receive_probe_req(drv);

        if (madwifi_wireless_event_init(drv))
                goto bad;

        return drv;
bad:
        if (drv->sock_xmit != NULL)
                l2_packet_deinit(drv->sock_xmit);
        if (drv->ioctl_sock >= 0)
                close(drv->ioctl_sock);
        if (drv != NULL)
                free(drv);
        return NULL;
}


static void
madwifi_deinit(void *priv)
{
        struct madwifi_driver_data *drv = priv;

        netlink_deinit(drv->netlink);
        (void) linux_set_iface_flags(drv->ioctl_sock, drv->iface, 0);
        if (drv->ioctl_sock >= 0)
                close(drv->ioctl_sock);
        if (drv->sock_recv != NULL && drv->sock_recv != drv->sock_xmit)
                l2_packet_deinit(drv->sock_recv);
        if (drv->sock_xmit != NULL)
                l2_packet_deinit(drv->sock_xmit);
        if (drv->sock_raw)
                l2_packet_deinit(drv->sock_raw);
        free(drv);
}

static int
madwifi_set_ssid(void *priv, const u8 *buf, int len)
{
        struct madwifi_driver_data *drv = priv;
        struct iwreq iwr;

        memset(&iwr, 0, sizeof(iwr));
        os_strlcpy(iwr.ifr_name, drv->iface, IFNAMSIZ);
        iwr.u.essid.flags = 1; /* SSID active */
        iwr.u.essid.pointer = (caddr_t) buf;
        iwr.u.essid.length = len + 1;

        if (ioctl(drv->ioctl_sock, SIOCSIWESSID, &iwr) < 0) {
                perror("ioctl[SIOCSIWESSID]");
                printf("len=%d\n", len);
                return -1;
        }
        return 0;
}

static int
madwifi_get_ssid(void *priv, u8 *buf, int len)
{
        struct madwifi_driver_data *drv = priv;
        struct iwreq iwr;
        int ret = 0;

        memset(&iwr, 0, sizeof(iwr));
        os_strlcpy(iwr.ifr_name, drv->iface, IFNAMSIZ);
        iwr.u.essid.pointer = (caddr_t) buf;
        iwr.u.essid.length = len;

        if (ioctl(drv->ioctl_sock, SIOCGIWESSID, &iwr) < 0) {
                perror("ioctl[SIOCGIWESSID]");
                ret = -1;
        } else
                ret = iwr.u.essid.length;

        return ret;
}

static int
madwifi_set_countermeasures(void *priv, int enabled)
{
        struct madwifi_driver_data *drv = priv;
        wpa_printf(MSG_DEBUG, "%s: enabled=%d", __FUNCTION__, enabled);
        return set80211param(drv, IEEE80211_PARAM_COUNTERMEASURES, enabled);
}

static int
madwifi_commit(void *priv)
{
        struct madwifi_driver_data *drv = priv;
        return linux_set_iface_flags(drv->ioctl_sock, drv->iface, 1);
}

const struct wpa_driver_ops wpa_driver_atheros_ops = {
        .name                   = "atheros",
        .hapd_init              = madwifi_init,
        .deinit                 = madwifi_deinit,
        .set_ieee8021x          = madwifi_set_ieee8021x,
        .set_privacy            = madwifi_set_privacy,
        .set_key                = madwifi_set_key,
        .get_seqnum             = madwifi_get_seqnum,
        .flush                  = madwifi_flush,
        .set_generic_elem       = madwifi_set_opt_ie,
        .sta_set_flags          = madwifi_sta_set_flags,
        .read_sta_data          = madwifi_read_sta_driver_data,
        .hapd_send_eapol        = madwifi_send_eapol,
        .sta_disassoc           = madwifi_sta_disassoc,
        .sta_deauth             = madwifi_sta_deauth,
        .hapd_set_ssid          = madwifi_set_ssid,
        .hapd_get_ssid          = madwifi_get_ssid,
        .set_countermeasures    = madwifi_set_countermeasures,
        .sta_clear_stats        = madwifi_sta_clear_stats,
        .commit                 = madwifi_commit,
        .set_ap_wps_ie          = madwifi_set_ap_wps_ie,
};