| Current Path : /usr/src/usr.sbin/wpa/wpa_supplicant/ |
FreeBSD hs32.drive.ne.jp 9.1-RELEASE FreeBSD 9.1-RELEASE #1: Wed Jan 14 12:18:08 JST 2015 root@hs32.drive.ne.jp:/sys/amd64/compile/hs32 amd64 |
| Current File : //usr/src/usr.sbin/wpa/wpa_supplicant/driver_freebsd.c |
/*
* WPA Supplicant - driver interaction with BSD net80211 layer
* Copyright (c) 2004, Sam Leffler <sam@errno.com>
*
* 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.
*
* $FreeBSD: release/9.1.0/usr.sbin/wpa/wpa_supplicant/driver_freebsd.c 214735 2010-11-03 10:44:25Z rpaulo $
*/
#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>
#include <string.h>
#include <sys/ioctl.h>
#include <errno.h>
#include "common.h"
#include "driver.h"
#include "eloop.h"
#include "l2_packet.h"
#include "ieee802_11_defs.h"
#include <sys/socket.h>
#include <net/if.h>
#include <net/if_media.h>
#include <net/ethernet.h>
#include <net80211/ieee80211_ioctl.h>
struct wpa_driver_bsd_data {
int sock; /* open socket for 802.11 ioctls */
int route; /* routing socket for events */
char ifname[IFNAMSIZ+1]; /* interface name */
unsigned int ifindex; /* interface index */
void *ctx;
int prev_roaming; /* roaming state to restore on deinit */
int prev_privacy; /* privacy state to restore on deinit */
int prev_wpa; /* wpa state to restore on deinit */
int prev_scanvalid; /* scan valid to restore on deinit */
uint8_t lastssid[IEEE80211_NWID_LEN];
int lastssid_len;
uint32_t drivercaps; /* general driver capabilities */
uint32_t cryptocaps; /* hardware crypto support */
enum ieee80211_opmode opmode; /* operation mode */
};
static enum ieee80211_opmode
get80211opmode(struct wpa_driver_bsd_data *drv)
{
struct ifmediareq ifmr;
(void) memset(&ifmr, 0, sizeof(ifmr));
(void) strncpy(ifmr.ifm_name, drv->ifname, sizeof(ifmr.ifm_name));
if (ioctl(drv->sock, SIOCGIFMEDIA, (caddr_t)&ifmr) >= 0) {
if (ifmr.ifm_current & IFM_IEEE80211_ADHOC) {
if (ifmr.ifm_current & IFM_FLAG0)
return IEEE80211_M_AHDEMO;
else
return IEEE80211_M_IBSS;
}
if (ifmr.ifm_current & IFM_IEEE80211_HOSTAP)
return IEEE80211_M_HOSTAP;
if (ifmr.ifm_current & IFM_IEEE80211_MONITOR)
return IEEE80211_M_MONITOR;
if (ifmr.ifm_current & IFM_IEEE80211_MBSS)
return IEEE80211_M_MBSS;
}
return IEEE80211_M_STA;
}
static int
set80211var(struct wpa_driver_bsd_data *drv, int op, const void *arg, int arg_len)
{
struct ieee80211req ireq;
memset(&ireq, 0, sizeof(ireq));
strncpy(ireq.i_name, drv->ifname, IFNAMSIZ);
ireq.i_type = op;
ireq.i_len = arg_len;
ireq.i_data = (void *) arg;
if (ioctl(drv->sock, SIOCS80211, &ireq) < 0) {
fprintf(stderr, "ioctl[SIOCS80211, op %u, len %u]: %s\n",
op, arg_len, strerror(errno));
return -1;
}
return 0;
}
static int
get80211var(struct wpa_driver_bsd_data *drv, int op, void *arg, int arg_len)
{
struct ieee80211req ireq;
memset(&ireq, 0, sizeof(ireq));
strncpy(ireq.i_name, drv->ifname, IFNAMSIZ);
ireq.i_type = op;
ireq.i_len = arg_len;
ireq.i_data = arg;
if (ioctl(drv->sock, SIOCG80211, &ireq) < 0) {
fprintf(stderr, "ioctl[SIOCG80211, op %u, len %u]: %s\n",
op, arg_len, strerror(errno));
return -1;
}
return ireq.i_len;
}
static int
set80211param(struct wpa_driver_bsd_data *drv, int op, int arg)
{
struct ieee80211req ireq;
memset(&ireq, 0, sizeof(ireq));
strncpy(ireq.i_name, drv->ifname, IFNAMSIZ);
ireq.i_type = op;
ireq.i_val = arg;
if (ioctl(drv->sock, SIOCS80211, &ireq) < 0) {
fprintf(stderr, "ioctl[SIOCS80211, op %u, arg 0x%x]: %s\n",
op, arg, strerror(errno));
return -1;
}
return 0;
}
static int
get80211param(struct wpa_driver_bsd_data *drv, int op)
{
struct ieee80211req ireq;
memset(&ireq, 0, sizeof(ireq));
strncpy(ireq.i_name, drv->ifname, IFNAMSIZ);
ireq.i_type = op;
if (ioctl(drv->sock, SIOCG80211, &ireq) < 0) {
fprintf(stderr, "ioctl[SIOCG80211, op %u]: %s\n",
op, strerror(errno));
return -1;
}
return ireq.i_val;
}
static int
getifflags(struct wpa_driver_bsd_data *drv, int *flags)
{
struct ifreq ifr;
memset(&ifr, 0, sizeof(ifr));
strncpy(ifr.ifr_name, drv->ifname, sizeof (ifr.ifr_name));
if (ioctl(drv->sock, SIOCGIFFLAGS, (caddr_t)&ifr) < 0) {
perror("SIOCGIFFLAGS");
return errno;
}
*flags = (ifr.ifr_flags & 0xffff) | (ifr.ifr_flagshigh << 16);
return 0;
}
static int
setifflags(struct wpa_driver_bsd_data *drv, int flags)
{
struct ifreq ifr;
memset(&ifr, 0, sizeof(ifr));
strncpy(ifr.ifr_name, drv->ifname, sizeof (ifr.ifr_name));
ifr.ifr_flags = flags & 0xffff;
ifr.ifr_flagshigh = flags >> 16;
if (ioctl(drv->sock, SIOCSIFFLAGS, (caddr_t)&ifr) < 0) {
perror("SIOCSIFFLAGS");
return errno;
}
return 0;
}
static int
wpa_driver_bsd_get_bssid(void *priv, u8 *bssid)
{
struct wpa_driver_bsd_data *drv = priv;
return get80211var(drv, IEEE80211_IOC_BSSID,
bssid, IEEE80211_ADDR_LEN) < 0 ? -1 : 0;
}
#if 0
static int
wpa_driver_bsd_set_bssid(void *priv, const char *bssid)
{
struct wpa_driver_bsd_data *drv = priv;
return set80211var(drv, IEEE80211_IOC_BSSID,
bssid, IEEE80211_ADDR_LEN);
}
#endif
static int
wpa_driver_bsd_get_ssid(void *priv, u8 *ssid)
{
struct wpa_driver_bsd_data *drv = priv;
return get80211var(drv, IEEE80211_IOC_SSID,
ssid, IEEE80211_NWID_LEN);
}
static int
wpa_driver_bsd_set_ssid(void *priv, const char *ssid,
size_t ssid_len)
{
struct wpa_driver_bsd_data *drv = priv;
return set80211var(drv, IEEE80211_IOC_SSID, ssid, ssid_len);
}
static int
wpa_driver_bsd_set_wpa_ie(struct wpa_driver_bsd_data *drv,
const u8 *wpa_ie, size_t wpa_ie_len)
{
struct ieee80211req ireq;
memset(&ireq, 0, sizeof(ireq));
strncpy(ireq.i_name, drv->ifname, IFNAMSIZ);
ireq.i_type = IEEE80211_IOC_APPIE;
ireq.i_val = IEEE80211_APPIE_WPA;
ireq.i_len = wpa_ie_len;
ireq.i_data = (void *) wpa_ie;
if (ioctl(drv->sock, SIOCS80211, &ireq) < 0) {
fprintf(stderr,
"ioctl[IEEE80211_IOC_APPIE:IEEE80211_APPIE_WPA]: %s\n",
strerror(errno));
return -1;
}
return 0;
}
static int
wpa_driver_bsd_set_wpa_internal(void *priv, int wpa, int privacy)
{
struct wpa_driver_bsd_data *drv = priv;
int ret = 0;
wpa_printf(MSG_DEBUG, "%s: wpa=%d privacy=%d",
__FUNCTION__, wpa, privacy);
if (!wpa && wpa_driver_bsd_set_wpa_ie(drv, NULL, 0) < 0)
ret = -1;
if (set80211param(drv, IEEE80211_IOC_PRIVACY, privacy) < 0)
ret = -1;
if (set80211param(drv, IEEE80211_IOC_WPA, wpa) < 0)
ret = -1;
return ret;
}
static int
wpa_driver_bsd_del_key(struct wpa_driver_bsd_data *drv, int key_idx,
const unsigned char *addr)
{
struct ieee80211req_del_key wk;
memset(&wk, 0, sizeof(wk));
if (addr != NULL &&
bcmp(addr, "\xff\xff\xff\xff\xff\xff", IEEE80211_ADDR_LEN) != 0) {
struct ether_addr ea;
memcpy(&ea, addr, IEEE80211_ADDR_LEN);
wpa_printf(MSG_DEBUG, "%s: addr=%s keyidx=%d",
__func__, ether_ntoa(&ea), key_idx);
memcpy(wk.idk_macaddr, addr, IEEE80211_ADDR_LEN);
wk.idk_keyix = (uint8_t) IEEE80211_KEYIX_NONE;
} else {
wpa_printf(MSG_DEBUG, "%s: keyidx=%d", __func__, key_idx);
wk.idk_keyix = key_idx;
}
return set80211var(drv, IEEE80211_IOC_DELKEY, &wk, sizeof(wk));
}
static int
wpa_driver_bsd_set_key(const char *ifname, void *priv, enum wpa_alg alg,
const unsigned char *addr, int key_idx, int set_tx,
const u8 *seq, size_t seq_len,
const u8 *key, size_t key_len)
{
struct wpa_driver_bsd_data *drv = priv;
struct ieee80211req_key wk;
struct ether_addr ea;
char *alg_name;
u_int8_t cipher;
if (alg == WPA_ALG_NONE)
return wpa_driver_bsd_del_key(drv, key_idx, addr);
switch (alg) {
case WPA_ALG_WEP:
alg_name = "WEP";
cipher = IEEE80211_CIPHER_WEP;
break;
case WPA_ALG_TKIP:
alg_name = "TKIP";
cipher = IEEE80211_CIPHER_TKIP;
break;
case WPA_ALG_CCMP:
alg_name = "CCMP";
cipher = IEEE80211_CIPHER_AES_CCM;
break;
default:
wpa_printf(MSG_DEBUG, "%s: unknown/unsupported algorithm %d",
__func__, alg);
return -1;
}
memcpy(&ea, addr, IEEE80211_ADDR_LEN);
wpa_printf(MSG_DEBUG,
"%s: alg=%s addr=%s key_idx=%d set_tx=%d seq_len=%zu key_len=%zu",
__func__, alg_name, ether_ntoa(&ea), key_idx, set_tx,
seq_len, key_len);
if (seq_len > sizeof(u_int64_t)) {
wpa_printf(MSG_DEBUG, "%s: seq_len %zu too big",
__func__, seq_len);
return -2;
}
if (key_len > sizeof(wk.ik_keydata)) {
wpa_printf(MSG_DEBUG, "%s: key length %zu too big",
__func__, key_len);
return -3;
}
memset(&wk, 0, sizeof(wk));
wk.ik_type = cipher;
wk.ik_flags = IEEE80211_KEY_RECV;
if (set_tx)
wk.ik_flags |= IEEE80211_KEY_XMIT;
memcpy(wk.ik_macaddr, addr, IEEE80211_ADDR_LEN);
/*
* Deduce whether group/global or unicast key by checking
* the address (yech). Note also that we can only mark global
* keys default; doing this for a unicast key is an error.
*/
if (bcmp(addr, "\xff\xff\xff\xff\xff\xff", IEEE80211_ADDR_LEN) == 0) {
wk.ik_flags |= IEEE80211_KEY_GROUP;
wk.ik_keyix = key_idx;
} else {
wk.ik_keyix = (key_idx == 0 ? IEEE80211_KEYIX_NONE : key_idx);
}
if (wk.ik_keyix != IEEE80211_KEYIX_NONE && set_tx)
wk.ik_flags |= IEEE80211_KEY_DEFAULT;
/*
* Ignore replay failures in IBSS and AHDEMO mode.
*/
if (drv->opmode == IEEE80211_M_IBSS ||
drv->opmode == IEEE80211_M_AHDEMO)
wk.ik_flags |= IEEE80211_KEY_NOREPLAY;
wk.ik_keylen = key_len;
memcpy(&wk.ik_keyrsc, seq, seq_len);
wk.ik_keyrsc = le64toh(wk.ik_keyrsc);
memcpy(wk.ik_keydata, key, key_len);
return set80211var(drv, IEEE80211_IOC_WPAKEY, &wk, sizeof(wk));
}
static int
wpa_driver_bsd_set_countermeasures(void *priv, int enabled)
{
struct wpa_driver_bsd_data *drv = priv;
wpa_printf(MSG_DEBUG, "%s: enabled=%d", __func__, enabled);
return set80211param(drv, IEEE80211_IOC_COUNTERMEASURES, enabled);
}
static int
wpa_driver_bsd_set_drop_unencrypted(void *priv, int enabled)
{
struct wpa_driver_bsd_data *drv = priv;
wpa_printf(MSG_DEBUG, "%s: enabled=%d", __func__, enabled);
return set80211param(drv, IEEE80211_IOC_DROPUNENCRYPTED, enabled);
}
static int
wpa_driver_bsd_set_auth_alg(void *priv, int auth_alg)
{
struct wpa_driver_bsd_data *drv = priv;
int authmode;
if ((auth_alg & WPA_AUTH_ALG_OPEN) &&
(auth_alg & WPA_AUTH_ALG_SHARED))
authmode = IEEE80211_AUTH_AUTO;
else if (auth_alg & WPA_AUTH_ALG_SHARED)
authmode = IEEE80211_AUTH_SHARED;
else
authmode = IEEE80211_AUTH_OPEN;
wpa_printf(MSG_DEBUG, "%s alg 0x%x authmode %u",
__func__, auth_alg, authmode);
return set80211param(drv, IEEE80211_IOC_AUTHMODE, authmode);
}
static int
wpa_driver_bsd_deauthenticate(void *priv, const u8 *addr, int reason_code)
{
struct wpa_driver_bsd_data *drv = priv;
struct ieee80211req_mlme mlme;
drv->lastssid_len = 0;
wpa_printf(MSG_DEBUG, "%s", __func__);
memset(&mlme, 0, sizeof(mlme));
mlme.im_op = IEEE80211_MLME_DEAUTH;
mlme.im_reason = reason_code;
memcpy(mlme.im_macaddr, addr, IEEE80211_ADDR_LEN);
return set80211var(drv, IEEE80211_IOC_MLME, &mlme, sizeof(mlme));
}
static int
wpa_driver_bsd_disassociate(void *priv, const u8 *addr, int reason_code)
{
struct wpa_driver_bsd_data *drv = priv;
struct ieee80211req_mlme mlme;
drv->lastssid_len = 0;
wpa_printf(MSG_DEBUG, "%s", __func__);
memset(&mlme, 0, sizeof(mlme));
mlme.im_op = IEEE80211_MLME_DISASSOC;
mlme.im_reason = reason_code;
memcpy(mlme.im_macaddr, addr, IEEE80211_ADDR_LEN);
return set80211var(drv, IEEE80211_IOC_MLME, &mlme, sizeof(mlme));
}
static int
wpa_driver_bsd_associate(void *priv, struct wpa_driver_associate_params *params)
{
struct wpa_driver_bsd_data *drv = priv;
struct ieee80211req_mlme mlme;
int flags, privacy;
wpa_printf(MSG_DEBUG,
"%s: ssid '%.*s' wpa ie len %u pairwise %u group %u key mgmt %u"
, __func__
, params->ssid_len, params->ssid
, params->wpa_ie_len
, params->pairwise_suite
, params->group_suite
, params->key_mgmt_suite
);
/* NB: interface must be marked UP to associate */
if (getifflags(drv, &flags) != 0) {
wpa_printf(MSG_DEBUG, "%s did not mark interface UP", __func__);
return -1;
}
if ((flags & IFF_UP) == 0 && setifflags(drv, flags | IFF_UP) != 0) {
wpa_printf(MSG_DEBUG, "%s unable to mark interface UP",
__func__);
return -1;
}
if (wpa_driver_bsd_set_drop_unencrypted(drv, params->drop_unencrypted)
< 0)
return -1;
if (wpa_driver_bsd_set_auth_alg(drv, params->auth_alg) < 0)
return -1;
/* XXX error handling is wrong but unclear what to do... */
if (wpa_driver_bsd_set_wpa_ie(drv, params->wpa_ie, params->wpa_ie_len) < 0)
return -1;
privacy = !(params->pairwise_suite == CIPHER_NONE &&
params->group_suite == CIPHER_NONE &&
params->key_mgmt_suite == KEY_MGMT_NONE &&
params->wpa_ie_len == 0);
wpa_printf(MSG_DEBUG, "%s: set PRIVACY %u", __func__, privacy);
if (set80211param(drv, IEEE80211_IOC_PRIVACY, privacy) < 0)
return -1;
if (params->wpa_ie_len &&
set80211param(drv, IEEE80211_IOC_WPA,
params->wpa_ie[0] == WLAN_EID_RSN ? 2 : 1) < 0)
return -1;
memset(&mlme, 0, sizeof(mlme));
mlme.im_op = IEEE80211_MLME_ASSOC;
if (params->ssid != NULL)
memcpy(mlme.im_ssid, params->ssid, params->ssid_len);
mlme.im_ssid_len = params->ssid_len;
if (params->bssid != NULL)
memcpy(mlme.im_macaddr, params->bssid, IEEE80211_ADDR_LEN);
if (set80211var(drv, IEEE80211_IOC_MLME, &mlme, sizeof(mlme)) < 0)
return -1;
memcpy(drv->lastssid, params->ssid, params->ssid_len);
drv->lastssid_len = params->ssid_len;
return 0;
}
static int
wpa_driver_bsd_scan(void *priv, struct wpa_driver_scan_params *params)
{
struct wpa_driver_bsd_data *drv = priv;
struct ieee80211_scan_req sr;
int i;
int flags;
/* XXX not true but easiest to perpetuate the myth */
/* NB: interface must be marked UP to do a scan */
if (getifflags(drv, &flags) != 0) {
wpa_printf(MSG_DEBUG, "%s did not mark interface UP", __func__);
return -1;
}
if ((flags & IFF_UP) == 0 && setifflags(drv, flags | IFF_UP) != 0) {
wpa_printf(MSG_DEBUG, "%s unable to mark interface UP",
__func__);
return -1;
}
memset(&sr, 0, sizeof(sr));
sr.sr_flags = IEEE80211_IOC_SCAN_ACTIVE
| IEEE80211_IOC_SCAN_ONCE
| IEEE80211_IOC_SCAN_NOJOIN
;
sr.sr_duration = IEEE80211_IOC_SCAN_FOREVER;
if (params->num_ssids > 0) {
sr.sr_nssid = params->num_ssids;
#if 0
/* Boundary check is done by upper layer */
if (sr.sr_nssid > IEEE80211_IOC_SCAN_MAX_SSID)
sr.sr_nssid = IEEE80211_IOC_SCAN_MAX_SSID;
#endif
/* NB: check scan cache first */
sr.sr_flags |= IEEE80211_IOC_SCAN_CHECK;
}
for (i = 0; i < sr.sr_nssid; i++) {
sr.sr_ssid[i].len = params->ssids[i].ssid_len;
os_memcpy(sr.sr_ssid[i].ssid, params->ssids[i].ssid,
sr.sr_ssid[i].len);
}
/* NB: net80211 delivers a scan complete event so no need to poll */
return set80211var(drv, IEEE80211_IOC_SCAN_REQ, &sr, sizeof(sr));
}
#include <net/route.h>
#include <net80211/ieee80211_freebsd.h>
static void
wpa_driver_bsd_event_receive(int sock, void *ctx, void *sock_ctx)
{
struct wpa_driver_bsd_data *drv = sock_ctx;
char buf[2048];
struct if_announcemsghdr *ifan;
struct if_msghdr *ifm;
struct rt_msghdr *rtm;
union wpa_event_data event;
struct ieee80211_michael_event *mic;
int n;
n = read(sock, buf, sizeof(buf));
if (n < 0) {
if (errno != EINTR && errno != EAGAIN)
perror("read(PF_ROUTE)");
return;
}
rtm = (struct rt_msghdr *) buf;
if (rtm->rtm_version != RTM_VERSION) {
wpa_printf(MSG_DEBUG, "Routing message version %d not "
"understood\n", rtm->rtm_version);
return;
}
memset(&event, 0, sizeof(event));
switch (rtm->rtm_type) {
case RTM_IFANNOUNCE:
ifan = (struct if_announcemsghdr *) rtm;
if (ifan->ifan_index != drv->ifindex)
break;
strlcpy(event.interface_status.ifname, drv->ifname,
sizeof(event.interface_status.ifname));
switch (ifan->ifan_what) {
case IFAN_DEPARTURE:
event.interface_status.ievent = EVENT_INTERFACE_REMOVED;
default:
return;
}
wpa_printf(MSG_DEBUG, "RTM_IFANNOUNCE: Interface '%s' %s",
event.interface_status.ifname,
ifan->ifan_what == IFAN_DEPARTURE ?
"removed" : "added");
wpa_supplicant_event(ctx, EVENT_INTERFACE_STATUS, &event);
break;
case RTM_IEEE80211:
ifan = (struct if_announcemsghdr *) rtm;
if (ifan->ifan_index != drv->ifindex)
break;
switch (ifan->ifan_what) {
case RTM_IEEE80211_ASSOC:
case RTM_IEEE80211_REASSOC:
wpa_supplicant_event(ctx, EVENT_ASSOC, NULL);
break;
case RTM_IEEE80211_DISASSOC:
wpa_supplicant_event(ctx, EVENT_DISASSOC, NULL);
break;
case RTM_IEEE80211_SCAN:
wpa_supplicant_event(ctx, EVENT_SCAN_RESULTS, NULL);
break;
case RTM_IEEE80211_REPLAY:
/* ignore */
break;
case RTM_IEEE80211_MICHAEL:
mic = (struct ieee80211_michael_event *) &ifan[1];
wpa_printf(MSG_DEBUG,
"Michael MIC failure wireless event: "
"keyix=%u src_addr=" MACSTR, mic->iev_keyix,
MAC2STR(mic->iev_src));
memset(&event, 0, sizeof(event));
event.michael_mic_failure.unicast =
!IEEE80211_IS_MULTICAST(mic->iev_dst);
wpa_supplicant_event(ctx, EVENT_MICHAEL_MIC_FAILURE,
&event);
break;
}
break;
case RTM_IFINFO:
ifm = (struct if_msghdr *) rtm;
if (ifm->ifm_index != drv->ifindex)
break;
if ((rtm->rtm_flags & RTF_UP) == 0) {
strlcpy(event.interface_status.ifname, drv->ifname,
sizeof(event.interface_status.ifname));
event.interface_status.ievent = EVENT_INTERFACE_REMOVED;
wpa_printf(MSG_DEBUG, "RTM_IFINFO: Interface '%s' DOWN",
event.interface_status.ifname);
wpa_supplicant_event(ctx, EVENT_INTERFACE_STATUS, &event);
}
break;
}
}
static int
getmaxrate(const uint8_t rates[15], uint8_t nrates)
{
int i, maxrate = -1;
for (i = 0; i < nrates; i++) {
int rate = rates[i] & IEEE80211_RATE_VAL;
if (rate > maxrate)
rate = maxrate;
}
return maxrate;
}
/* unalligned little endian access */
#define LE_READ_4(p) \
((u_int32_t) \
((((const u_int8_t *)(p))[0] ) | \
(((const u_int8_t *)(p))[1] << 8) | \
(((const u_int8_t *)(p))[2] << 16) | \
(((const u_int8_t *)(p))[3] << 24)))
static int __inline
iswpaoui(const u_int8_t *frm)
{
return frm[1] > 3 && LE_READ_4(frm+2) == ((WPA_OUI_TYPE<<24)|WPA_OUI);
}
static void
wpa_driver_bsd_add_scan_entry(struct wpa_scan_results *res,
struct ieee80211req_scan_result *sr)
{
struct wpa_scan_res *result, **tmp;
size_t extra_len;
u8 *pos;
extra_len = 2 + sr->isr_ssid_len;
extra_len += 2 + sr->isr_nrates;
extra_len += 3; /* ERP IE */
extra_len += sr->isr_ie_len;
result = os_zalloc(sizeof(*result) + extra_len);
if (result == NULL)
return;
os_memcpy(result->bssid, sr->isr_bssid, ETH_ALEN);
result->freq = sr->isr_freq;
result->beacon_int = sr->isr_intval;
result->caps = sr->isr_capinfo;
result->qual = sr->isr_rssi;
result->noise = sr->isr_noise;
pos = (u8 *)(result + 1);
*pos++ = WLAN_EID_SSID;
*pos++ = sr->isr_ssid_len;
os_memcpy(pos, sr + 1, sr->isr_ssid_len);
pos += sr->isr_ssid_len;
/*
* Deal all rates as supported rate.
* Because net80211 doesn't report extended supported rate or not.
*/
*pos++ = WLAN_EID_SUPP_RATES;
*pos++ = sr->isr_nrates;
os_memcpy(pos, sr->isr_rates, sr->isr_nrates);
pos += sr->isr_nrates;
*pos++ = WLAN_EID_ERP_INFO;
*pos++ = 1;
*pos++ = sr->isr_erp;
os_memcpy(pos, (u8 *)(sr + 1) + sr->isr_ssid_len, sr->isr_ie_len);
pos += sr->isr_ie_len;
result->ie_len = pos - (u8 *)(result + 1);
tmp = os_realloc(res->res,
(res->num + 1) * sizeof(struct wpa_scan_res *));
if (tmp == NULL) {
os_free(result);
return;
}
tmp[res->num++] = result;
res->res = tmp;
}
static struct wpa_scan_results *
wpa_driver_bsd_get_scan_results2(void *priv)
{
struct ieee80211req_scan_result *sr;
struct wpa_scan_results *res;
int len, rest;
uint8_t buf[24*1024], *pos;
len = get80211var(priv, IEEE80211_IOC_SCAN_RESULTS, buf, 24*1024);
if (len < 0)
return NULL;
res = os_zalloc(sizeof(*res));
if (res == NULL)
return NULL;
pos = buf;
rest = len;
while (rest >= sizeof(struct ieee80211req_scan_result)) {
sr = (struct ieee80211req_scan_result *)pos;
wpa_driver_bsd_add_scan_entry(res, sr);
pos += sr->isr_len;
rest -= sr->isr_len;
}
wpa_printf(MSG_DEBUG, "Received %d bytes of scan results (%lu BSSes)",
len, (unsigned long)res->num);
return (res);
}
#define GETPARAM(drv, param, v) \
(((v) = get80211param(drv, param)) != -1)
#define IEEE80211_C_BGSCAN 0x20000000
/*
* Set the scan cache valid threshold to 1.5 x bg scan interval
* to force all scan requests to consult the cache unless they
* explicitly bypass it.
*/
static int
setscanvalid(struct wpa_driver_bsd_data *drv)
{
int bgscan, scanvalid;
if (!GETPARAM(drv, IEEE80211_IOC_SCANVALID, drv->prev_scanvalid) ||
!GETPARAM(drv, IEEE80211_IOC_BGSCAN_INTERVAL, bgscan))
return -1;
scanvalid = 3*bgscan/2;
return (drv->prev_scanvalid < scanvalid) ?
set80211param(drv, IEEE80211_IOC_SCANVALID, scanvalid) : 0;
}
static void *
wpa_driver_bsd_init(void *ctx, const char *ifname)
{
struct wpa_driver_bsd_data *drv;
struct ieee80211_devcaps_req devcaps;
int flags;
drv = malloc(sizeof(*drv));
if (drv == NULL)
return NULL;
memset(drv, 0, sizeof(*drv));
/*
* NB: We require the interface name be mappable to an index.
* This implies we do not support having wpa_supplicant
* wait for an interface to appear. This seems ok; that
* doesn't belong here; it's really the job of devd.
*/
drv->ifindex = if_nametoindex(ifname);
if (drv->ifindex == 0) {
wpa_printf(MSG_DEBUG, "%s: interface %s does not exist",
__func__, ifname);
goto fail1;
}
drv->sock = socket(PF_INET, SOCK_DGRAM, 0);
if (drv->sock < 0)
goto fail1;
drv->ctx = ctx;
strncpy(drv->ifname, ifname, sizeof(drv->ifname));
/*
* Mark the interface as down to ensure wpa_supplicant has exclusive
* access to the net80211 state machine, do this before opening the
* route socket to avoid a false event that the interface disappeared.
*/
if (getifflags(drv, &flags) == 0)
(void) setifflags(drv, flags &~ IFF_UP);
drv->route = socket(PF_ROUTE, SOCK_RAW, 0);
if (drv->route < 0)
goto fail;
eloop_register_read_sock(drv->route,
wpa_driver_bsd_event_receive, ctx, drv);
if (get80211var(drv, IEEE80211_IOC_DEVCAPS, &devcaps, sizeof(devcaps)) < 0) {
wpa_printf(MSG_DEBUG,
"%s: failed to get device capabilities: %s",
__func__, strerror(errno));
goto fail;
}
drv->drivercaps = devcaps.dc_drivercaps;
drv->cryptocaps = devcaps.dc_cryptocaps;
if (!GETPARAM(drv, IEEE80211_IOC_ROAMING, drv->prev_roaming)) {
wpa_printf(MSG_DEBUG, "%s: failed to get roaming state: %s",
__func__, strerror(errno));
goto fail;
}
if (!GETPARAM(drv, IEEE80211_IOC_PRIVACY, drv->prev_privacy)) {
wpa_printf(MSG_DEBUG, "%s: failed to get privacy state: %s",
__func__, strerror(errno));
goto fail;
}
if (!GETPARAM(drv, IEEE80211_IOC_WPA, drv->prev_wpa)) {
wpa_printf(MSG_DEBUG, "%s: failed to get wpa state: %s",
__func__, strerror(errno));
goto fail;
}
if (set80211param(drv, IEEE80211_IOC_ROAMING, IEEE80211_ROAMING_MANUAL) < 0) {
wpa_printf(MSG_DEBUG, "%s: failed to set wpa_supplicant-based "
"roaming: %s", __func__, strerror(errno));
goto fail;
}
if (drv->drivercaps & IEEE80211_C_BGSCAN) {
/*
* Driver does background scanning; force the scan valid
* setting to 1.5 x bg scan interval so the scan cache is
* always consulted before we force a foreground scan.
*/
if (setscanvalid(drv) < 0) {
wpa_printf(MSG_DEBUG,
"%s: warning, failed to set scanvalid, scanning "
"may be suboptimal: %s", __func__, strerror(errno));
}
}
if (set80211param(drv, IEEE80211_IOC_WPA, 1+2) < 0) {
wpa_printf(MSG_DEBUG, "%s: failed to enable WPA support %s",
__func__, strerror(errno));
goto fail;
}
drv->opmode = get80211opmode(drv);
return drv;
fail:
close(drv->sock);
fail1:
free(drv);
return NULL;
}
#undef GETPARAM
static void
wpa_driver_bsd_deinit(void *priv)
{
struct wpa_driver_bsd_data *drv = priv;
int flags;
/* NB: mark interface down */
if (getifflags(drv, &flags) == 0)
(void) setifflags(drv, flags &~ IFF_UP);
wpa_driver_bsd_set_wpa_internal(drv, drv->prev_wpa, drv->prev_privacy);
if (set80211param(drv, IEEE80211_IOC_ROAMING, drv->prev_roaming) < 0) {
/* NB: don't whinge if device ejected or equivalent */
if (errno != ENXIO)
wpa_printf(MSG_DEBUG, "%s: failed to restore roaming "
"state", __func__);
}
if (drv->drivercaps & IEEE80211_C_BGSCAN) {
/* XXX check return value */
(void) set80211param(drv, IEEE80211_IOC_SCANVALID,
drv->prev_scanvalid);
}
(void) close(drv->route); /* ioctl socket */
(void) close(drv->sock); /* event socket */
free(drv);
}
struct wpa_driver_ops wpa_driver_bsd_ops = {
.name = "bsd",
.desc = "BSD 802.11 support (Atheros, etc.)",
.init = wpa_driver_bsd_init,
.deinit = wpa_driver_bsd_deinit,
.get_bssid = wpa_driver_bsd_get_bssid,
.get_ssid = wpa_driver_bsd_get_ssid,
.set_key = wpa_driver_bsd_set_key,
.set_countermeasures = wpa_driver_bsd_set_countermeasures,
.scan2 = wpa_driver_bsd_scan,
.get_scan_results2 = wpa_driver_bsd_get_scan_results2,
.deauthenticate = wpa_driver_bsd_deauthenticate,
.disassociate = wpa_driver_bsd_disassociate,
.associate = wpa_driver_bsd_associate,
};