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fragattacks/hostapd/driver_madwifi.c
Jouni Malinen b1c0e29733 Include config.h explicitly into files that actually use it 
hostapd.h does not need to include config.h.
2009-03-25 16:29:00 +02:00

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/*
* hostapd / Driver interaction with MADWIFI 802.11 driver
* Copyright (c) 2004, Sam Leffler <sam@errno.com>
* Copyright (c) 2004, Video54 Technologies
* Copyright (c) 2005-2007, 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 <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 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 RSN_VERSION
#undef WPA_VERSION
#undef WPA_OUI_TYPE
#undef WME_OUI_TYPE
#ifdef IEEE80211_IOCTL_SETWMMPARAMS
/* Assume this is built against madwifi-ng */
#define MADWIFI_NG
#endif /* IEEE80211_IOCTL_SETWMMPARAMS */
#include "wireless_copy.h"
#include "hostapd.h"
#include "config.h"
#include "driver.h"
#include "eloop.h"
#include "priv_netlink.h"
#include "l2_packet/l2_packet.h"
#include "common.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);
static int
set80211priv(struct madwifi_driver_data *drv, int op, void *data, int len)
{
struct iwreq iwr;
int do_inline = len < IFNAMSIZ;
memset(&iwr, 0, sizeof(iwr));
os_strlcpy(iwr.ifr_name, drv->iface, IFNAMSIZ);
#ifdef IEEE80211_IOCTL_FILTERFRAME
/* FILTERFRAME must be NOT inline, regardless of size. */
if (op == IEEE80211_IOCTL_FILTERFRAME)
do_inline = 0;
#endif /* IEEE80211_IOCTL_FILTERFRAME */
if (op == IEEE80211_IOCTL_SET_APPIEBUF)
do_inline = 0;
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) {
#ifdef MADWIFI_NG
int first = IEEE80211_IOCTL_SETPARAM;
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]",
"ioctl[IEEE80211_IOCTL_GET_APPIEBUF]",
"ioctl[IEEE80211_IOCTL_SET_APPIEBUF]",
"ioctl[IEEE80211_IOCTL_GETSCANRESULTS]",
"ioctl[IEEE80211_IOCTL_FILTERFRAME]",
"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;
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 &&
idx < (int) (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));
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;
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 & 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 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, const char *alg,
const u8 *addr, int key_idx,
const u8 *key, size_t key_len, int txkey)
{
struct madwifi_driver_data *drv = priv;
struct ieee80211req_key wk;
u_int8_t cipher;
int ret;
if (strcmp(alg, "none") == 0)
return madwifi_del_key(drv, addr, key_idx);
wpa_printf(MSG_DEBUG, "%s: alg=%s addr=%s key_idx=%d",
__func__, alg, ether_sprintf(addr), key_idx);
if (strcmp(alg, "WEP") == 0)
cipher = IEEE80211_CIPHER_WEP;
else if (strcmp(alg, "TKIP") == 0)
cipher = IEEE80211_CIPHER_TKIP;
else if (strcmp(alg, "CCMP") == 0)
cipher = IEEE80211_CIPHER_AES_CCM;
else {
printf("%s: unknown/unsupported algorithm %s\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 '%s' key_len %lu txkey %d)",
__func__, ether_sprintf(wk.ik_macaddr), key_idx,
alg, (unsigned long) key_len, txkey);
}
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;
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)
{
#ifdef MADWIFI_BSD
u8 allsta[IEEE80211_ADDR_LEN];
memset(allsta, 0xff, IEEE80211_ADDR_LEN);
return madwifi_sta_deauth(priv, allsta, IEEE80211_REASON_AUTH_LEAVE);
#else /* MADWIFI_BSD */
return 0; /* XXX */
#endif /* MADWIFI_BSD */
}
static int
madwifi_read_sta_driver_data(void *priv, struct hostap_sta_driver_data *data,
const u8 *addr)
{
struct madwifi_driver_data *drv = priv;
#ifdef MADWIFI_BSD
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,
#ifdef MADWIFI_NG
IEEE80211_IOCTL_STA_STATS,
#else /* MADWIFI_NG */
IEEE80211_IOCTL_GETSTASTATS,
#endif /* MADWIFI_NG */
&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;
#else /* MADWIFI_BSD */
char buf[1024], line[128], *pos;
FILE *f;
unsigned long val;
memset(data, 0, sizeof(*data));
snprintf(buf, sizeof(buf), "/proc/net/madwifi/%s/" MACSTR,
drv->iface, MAC2STR(addr));
f = fopen(buf, "r");
if (!f) {
if (memcmp(addr, drv->acct_mac, ETH_ALEN) != 0)
return -1;
memcpy(data, &drv->acct_data, sizeof(*data));
return 0;
}
/* Need to read proc file with in one piece, so use large enough
* buffer. */
setbuffer(f, buf, sizeof(buf));
while (fgets(line, sizeof(line), f)) {
pos = strchr(line, '=');
if (!pos)
continue;
*pos++ = '\0';
val = strtoul(pos, NULL, 10);
if (strcmp(line, "rx_packets") == 0)
data->rx_packets = val;
else if (strcmp(line, "tx_packets") == 0)
data->tx_packets = val;
else if (strcmp(line, "rx_bytes") == 0)
data->rx_bytes = val;
else if (strcmp(line, "tx_bytes") == 0)
data->tx_bytes = val;
}
fclose(f);
return 0;
#endif /* MADWIFI_BSD */
}
static int
madwifi_sta_clear_stats(void *priv, const u8 *addr)
{
#if defined(MADWIFI_BSD) && defined(IEEE80211_MLME_CLEAR_STATS)
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;
#else /* MADWIFI_BSD && IEEE80211_MLME_CLEAR_STATS */
return 0; /* FIX */
#endif /* MADWIFI_BSD && IEEE80211_MLME_CLEAR_STATS */
}
static int
madwifi_set_opt_ie(const char *ifname, 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 *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 *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
#ifdef IEEE80211_IOCTL_FILTERFRAME
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;
const u8 *end, *ie;
u16 fc;
size_t ie_len;
/* 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;
end = buf + len;
ie = mgmt->u.probe_req.variable;
ie_len = len - (IEEE80211_HDRLEN + sizeof(mgmt->u.probe_req));
hostapd_wps_probe_req_rx(drv->hapd, mgmt->sa, ie, ie_len);
}
#endif /* IEEE80211_IOCTL_FILTERFRAME */
#endif /* CONFIG_WPS */
static int madwifi_receive_probe_req(struct madwifi_driver_data *drv)
{
int ret = 0;
#ifdef CONFIG_WPS
#ifdef IEEE80211_IOCTL_FILTERFRAME
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 /* IEEE80211_IOCTL_FILTERFRAME */
#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_wps_beacon_ie(const char *ifname, void *priv, const u8 *ie,
size_t len)
{
return madwifi_set_wps_ie(priv, ie, len, IEEE80211_APPIE_FRAME_BEACON);
}
static int
madwifi_set_wps_probe_resp_ie(const char *ifname, void *priv, const u8 *ie,
size_t len)
{
return madwifi_set_wps_ie(priv, ie, len,
IEEE80211_APPIE_FRAME_PROBE_RESP);
}
#else /* CONFIG_WPS */
#define madwifi_set_wps_beacon_ie NULL
#define madwifi_set_wps_probe_resp_ie NULL
#endif /* CONFIG_WPS */
static int
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, res;
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))) {
wpa_printf(MSG_DEBUG, "%s: Failed to get WPA/RSN IE",
__func__);
goto no_ie;
}
wpa_hexdump(MSG_MSGDUMP, "madwifi req WPA IE",
ie.wpa_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;
#ifdef MADWIFI_NG
wpa_hexdump(MSG_MSGDUMP, "madwifi req RSN IE",
ie.rsn_ie, IEEE80211_MAX_OPT_IE);
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;
}
#endif /* MADWIFI_NG */
ielen = iebuf[1];
if (ielen == 0)
iebuf = NULL;
else
ielen += 2;
no_ie:
res = hostapd_notif_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));
}
return res;
}
static void
madwifi_wireless_event_wireless_custom(struct madwifi_driver_data *drv,
char *custom)
{
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) {
hostapd_michael_mic_failure(drv->hapd, addr);
} 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;
}
}
}
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 == 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:
hostapd_notif_disassoc(drv->hapd,
(u8 *) iwe->u.addr.sa_data);
break;
case IWEVREGISTERED:
madwifi_new_sta(drv, (u8 *) iwe->u.addr.sa_data);
break;
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);
free(buf);
break;
}
pos += iwe->len;
}
}
static void
madwifi_wireless_event_rtm_newlink(struct madwifi_driver_data *drv,
struct nlmsghdr *h, int len)
{
struct ifinfomsg *ifi;
int attrlen, nlmsg_len, rta_len;
struct rtattr * attr;
if (len < (int) sizeof(*ifi))
return;
ifi = NLMSG_DATA(h);
if (ifi->ifi_index != drv->ifindex)
return;
nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
attrlen = h->nlmsg_len - nlmsg_len;
if (attrlen < 0)
return;
attr = (struct rtattr *) (((char *) ifi) + nlmsg_len);
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 void
madwifi_wireless_event_receive(int sock, void *eloop_ctx, void *sock_ctx)
{
char buf[256];
int left;
struct sockaddr_nl from;
socklen_t fromlen;
struct nlmsghdr *h;
struct madwifi_driver_data *drv = eloop_ctx;
fromlen = sizeof(from);
left = recvfrom(sock, buf, sizeof(buf), MSG_DONTWAIT,
(struct sockaddr *) &from, &fromlen);
if (left < 0) {
if (errno != EINTR && errno != EAGAIN)
perror("recvfrom(netlink)");
return;
}
h = (struct nlmsghdr *) buf;
while (left >= (int) sizeof(*h)) {
int len, plen;
len = h->nlmsg_len;
plen = len - sizeof(*h);
if (len > left || plen < 0) {
printf("Malformed netlink message: "
"len=%d left=%d plen=%d\n",
len, left, plen);
break;
}
switch (h->nlmsg_type) {
case RTM_NEWLINK:
madwifi_wireless_event_rtm_newlink(drv, h, plen);
break;
}
len = NLMSG_ALIGN(len);
left -= len;
h = (struct nlmsghdr *) ((char *) h + len);
}
if (left > 0) {
printf("%d extra bytes in the end of netlink message\n", left);
}
}
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(void *priv)
{
struct madwifi_driver_data *drv = priv;
int s;
struct sockaddr_nl local;
madwifi_get_we_version(drv);
drv->wext_sock = -1;
s = socket(PF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
if (s < 0) {
perror("socket(PF_NETLINK,SOCK_RAW,NETLINK_ROUTE)");
return -1;
}
memset(&local, 0, sizeof(local));
local.nl_family = AF_NETLINK;
local.nl_groups = RTMGRP_LINK;
if (bind(s, (struct sockaddr *) &local, sizeof(local)) < 0) {
perror("bind(netlink)");
close(s);
return -1;
}
eloop_register_read_sock(s, madwifi_wireless_event_receive, drv, NULL);
drv->wext_sock = s;
return 0;
}
static void
madwifi_wireless_event_deinit(void *priv)
{
struct madwifi_driver_data *drv = priv;
if (drv != NULL) {
if (drv->wext_sock < 0)
return;
eloop_unregister_read_sock(drv->wext_sock);
close(drv->wext_sock);
}
}
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;
hostapd_eapol_receive(drv->hapd, src_addr,
buf + sizeof(struct l2_ethhdr),
len - sizeof(struct l2_ethhdr));
}
static void *
madwifi_init(struct hostapd_data *hapd)
{
struct madwifi_driver_data *drv;
struct ifreq ifr;
struct iwreq iwr;
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, hapd->conf->iface, 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, hapd->own_addr))
goto bad;
if (hapd->conf->bridge[0] != '\0') {
wpa_printf(MSG_DEBUG, "Configure bridge %s for EAPOL traffic.",
hapd->conf->bridge);
drv->sock_recv = l2_packet_init(hapd->conf->bridge, 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;
}
madwifi_set_iface_flags(drv, 0); /* mark down during setup */
madwifi_set_privacy(drv->iface, drv, 0); /* default to no privacy */
madwifi_receive_probe_req(drv);
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;
(void) madwifi_set_iface_flags(drv, 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(const char *ifname, 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(const char *ifname, 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)
{
return madwifi_set_iface_flags(priv, 1);
}
const struct wpa_driver_ops wpa_driver_madwifi_ops = {
.name = "madwifi",
.init = madwifi_init,
.deinit = madwifi_deinit,
.set_ieee8021x = madwifi_set_ieee8021x,
.set_privacy = madwifi_set_privacy,
.set_encryption = madwifi_set_key,
.get_seqnum = madwifi_get_seqnum,
.flush = madwifi_flush,
.set_generic_elem = madwifi_set_opt_ie,
.wireless_event_init = madwifi_wireless_event_init,
.wireless_event_deinit = madwifi_wireless_event_deinit,
.sta_set_flags = madwifi_sta_set_flags,
.read_sta_data = madwifi_read_sta_driver_data,
.send_eapol = madwifi_send_eapol,
.sta_disassoc = madwifi_sta_disassoc,
.sta_deauth = madwifi_sta_deauth,
.set_ssid = madwifi_set_ssid,
.get_ssid = madwifi_get_ssid,
.set_countermeasures = madwifi_set_countermeasures,
.sta_clear_stats = madwifi_sta_clear_stats,
.commit = madwifi_commit,
.set_wps_beacon_ie = madwifi_set_wps_beacon_ie,
.set_wps_probe_resp_ie = madwifi_set_wps_probe_resp_ie,
};
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