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fragattacks/src/drivers/driver_wext.c
Johannes Berg d306df7919 wext: Add very basic status command support 
Just to make the test framework happy, it uses the driver
status command to obtain the interface MAC address.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2014-11-28 23:02:29 +02:00

2405 lines
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/*
* Driver interaction with generic Linux Wireless Extensions
* Copyright (c) 2003-2010, Jouni Malinen <j@w1.fi>
*
* This software may be distributed under the terms of the BSD license.
* See README for more details.
*
* This file implements a driver interface for the Linux Wireless Extensions.
* When used with WE-18 or newer, this interface can be used as-is with number
* of drivers. In addition to this, some of the common functions in this file
* can be used by other driver interface implementations that use generic WE
* ioctls, but require private ioctls for some of the functionality.
*/
#include "includes.h"
#include <sys/ioctl.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <net/if_arp.h>
#include "linux_wext.h"
#include "common.h"
#include "eloop.h"
#include "common/ieee802_11_defs.h"
#include "common/wpa_common.h"
#include "priv_netlink.h"
#include "netlink.h"
#include "linux_ioctl.h"
#include "rfkill.h"
#include "driver.h"
#include "driver_wext.h"
static int wpa_driver_wext_flush_pmkid(void *priv);
static int wpa_driver_wext_get_range(void *priv);
static int wpa_driver_wext_finish_drv_init(struct wpa_driver_wext_data *drv);
static void wpa_driver_wext_disconnect(struct wpa_driver_wext_data *drv);
static int wpa_driver_wext_set_auth_alg(void *priv, int auth_alg);
int wpa_driver_wext_set_auth_param(struct wpa_driver_wext_data *drv,
int idx, u32 value)
{
struct iwreq iwr;
int ret = 0;
os_memset(&iwr, 0, sizeof(iwr));
os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
iwr.u.param.flags = idx & IW_AUTH_INDEX;
iwr.u.param.value = value;
if (ioctl(drv->ioctl_sock, SIOCSIWAUTH, &iwr) < 0) {
if (errno != EOPNOTSUPP) {
wpa_printf(MSG_DEBUG, "WEXT: SIOCSIWAUTH(param %d "
"value 0x%x) failed: %s)",
idx, value, strerror(errno));
}
ret = errno == EOPNOTSUPP ? -2 : -1;
}
return ret;
}
/**
* wpa_driver_wext_get_bssid - Get BSSID, SIOCGIWAP
* @priv: Pointer to private wext data from wpa_driver_wext_init()
* @bssid: Buffer for BSSID
* Returns: 0 on success, -1 on failure
*/
int wpa_driver_wext_get_bssid(void *priv, u8 *bssid)
{
struct wpa_driver_wext_data *drv = priv;
struct iwreq iwr;
int ret = 0;
os_memset(&iwr, 0, sizeof(iwr));
os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
if (ioctl(drv->ioctl_sock, SIOCGIWAP, &iwr) < 0) {
perror("ioctl[SIOCGIWAP]");
ret = -1;
}
os_memcpy(bssid, iwr.u.ap_addr.sa_data, ETH_ALEN);
return ret;
}
/**
* wpa_driver_wext_set_bssid - Set BSSID, SIOCSIWAP
* @priv: Pointer to private wext data from wpa_driver_wext_init()
* @bssid: BSSID
* Returns: 0 on success, -1 on failure
*/
int wpa_driver_wext_set_bssid(void *priv, const u8 *bssid)
{
struct wpa_driver_wext_data *drv = priv;
struct iwreq iwr;
int ret = 0;
os_memset(&iwr, 0, sizeof(iwr));
os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
iwr.u.ap_addr.sa_family = ARPHRD_ETHER;
if (bssid)
os_memcpy(iwr.u.ap_addr.sa_data, bssid, ETH_ALEN);
else
os_memset(iwr.u.ap_addr.sa_data, 0, ETH_ALEN);
if (ioctl(drv->ioctl_sock, SIOCSIWAP, &iwr) < 0) {
perror("ioctl[SIOCSIWAP]");
ret = -1;
}
return ret;
}
/**
* wpa_driver_wext_get_ssid - Get SSID, SIOCGIWESSID
* @priv: Pointer to private wext data from wpa_driver_wext_init()
* @ssid: Buffer for the SSID; must be at least 32 bytes long
* Returns: SSID length on success, -1 on failure
*/
int wpa_driver_wext_get_ssid(void *priv, u8 *ssid)
{
struct wpa_driver_wext_data *drv = priv;
struct iwreq iwr;
int ret = 0;
os_memset(&iwr, 0, sizeof(iwr));
os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
iwr.u.essid.pointer = (caddr_t) ssid;
iwr.u.essid.length = 32;
if (ioctl(drv->ioctl_sock, SIOCGIWESSID, &iwr) < 0) {
perror("ioctl[SIOCGIWESSID]");
ret = -1;
} else {
ret = iwr.u.essid.length;
if (ret > 32)
ret = 32;
/* Some drivers include nul termination in the SSID, so let's
* remove it here before further processing. WE-21 changes this
* to explicitly require the length _not_ to include nul
* termination. */
if (ret > 0 && ssid[ret - 1] == '\0' &&
drv->we_version_compiled < 21)
ret--;
}
return ret;
}
/**
* wpa_driver_wext_set_ssid - Set SSID, SIOCSIWESSID
* @priv: Pointer to private wext data from wpa_driver_wext_init()
* @ssid: SSID
* @ssid_len: Length of SSID (0..32)
* Returns: 0 on success, -1 on failure
*/
int wpa_driver_wext_set_ssid(void *priv, const u8 *ssid, size_t ssid_len)
{
struct wpa_driver_wext_data *drv = priv;
struct iwreq iwr;
int ret = 0;
char buf[33];
if (ssid_len > 32)
return -1;
os_memset(&iwr, 0, sizeof(iwr));
os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
/* flags: 1 = ESSID is active, 0 = not (promiscuous) */
iwr.u.essid.flags = (ssid_len != 0);
os_memset(buf, 0, sizeof(buf));
os_memcpy(buf, ssid, ssid_len);
iwr.u.essid.pointer = (caddr_t) buf;
if (drv->we_version_compiled < 21) {
/* For historic reasons, set SSID length to include one extra
* character, C string nul termination, even though SSID is
* really an octet string that should not be presented as a C
* string. Some Linux drivers decrement the length by one and
* can thus end up missing the last octet of the SSID if the
* length is not incremented here. WE-21 changes this to
* explicitly require the length _not_ to include nul
* termination. */
if (ssid_len)
ssid_len++;
}
iwr.u.essid.length = ssid_len;
if (ioctl(drv->ioctl_sock, SIOCSIWESSID, &iwr) < 0) {
perror("ioctl[SIOCSIWESSID]");
ret = -1;
}
return ret;
}
/**
* wpa_driver_wext_set_freq - Set frequency/channel, SIOCSIWFREQ
* @priv: Pointer to private wext data from wpa_driver_wext_init()
* @freq: Frequency in MHz
* Returns: 0 on success, -1 on failure
*/
int wpa_driver_wext_set_freq(void *priv, int freq)
{
struct wpa_driver_wext_data *drv = priv;
struct iwreq iwr;
int ret = 0;
os_memset(&iwr, 0, sizeof(iwr));
os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
iwr.u.freq.m = freq * 100000;
iwr.u.freq.e = 1;
if (ioctl(drv->ioctl_sock, SIOCSIWFREQ, &iwr) < 0) {
perror("ioctl[SIOCSIWFREQ]");
ret = -1;
}
return ret;
}
static void
wpa_driver_wext_event_wireless_custom(void *ctx, char *custom)
{
union wpa_event_data data;
wpa_printf(MSG_MSGDUMP, "WEXT: Custom wireless event: '%s'",
custom);
os_memset(&data, 0, sizeof(data));
/* Host AP driver */
if (os_strncmp(custom, "MLME-MICHAELMICFAILURE.indication", 33) == 0) {
data.michael_mic_failure.unicast =
os_strstr(custom, " unicast ") != NULL;
/* TODO: parse parameters(?) */
wpa_supplicant_event(ctx, EVENT_MICHAEL_MIC_FAILURE, &data);
} else if (os_strncmp(custom, "ASSOCINFO(ReqIEs=", 17) == 0) {
char *spos;
int bytes;
u8 *req_ies = NULL, *resp_ies = NULL;
spos = custom + 17;
bytes = strspn(spos, "0123456789abcdefABCDEF");
if (!bytes || (bytes & 1))
return;
bytes /= 2;
req_ies = os_malloc(bytes);
if (req_ies == NULL ||
hexstr2bin(spos, req_ies, bytes) < 0)
goto done;
data.assoc_info.req_ies = req_ies;
data.assoc_info.req_ies_len = bytes;
spos += bytes * 2;
data.assoc_info.resp_ies = NULL;
data.assoc_info.resp_ies_len = 0;
if (os_strncmp(spos, " RespIEs=", 9) == 0) {
spos += 9;
bytes = strspn(spos, "0123456789abcdefABCDEF");
if (!bytes || (bytes & 1))
goto done;
bytes /= 2;
resp_ies = os_malloc(bytes);
if (resp_ies == NULL ||
hexstr2bin(spos, resp_ies, bytes) < 0)
goto done;
data.assoc_info.resp_ies = resp_ies;
data.assoc_info.resp_ies_len = bytes;
}
wpa_supplicant_event(ctx, EVENT_ASSOCINFO, &data);
done:
os_free(resp_ies);
os_free(req_ies);
#ifdef CONFIG_PEERKEY
} else if (os_strncmp(custom, "STKSTART.request=", 17) == 0) {
if (hwaddr_aton(custom + 17, data.stkstart.peer)) {
wpa_printf(MSG_DEBUG, "WEXT: unrecognized "
"STKSTART.request '%s'", custom + 17);
return;
}
wpa_supplicant_event(ctx, EVENT_STKSTART, &data);
#endif /* CONFIG_PEERKEY */
}
}
static int wpa_driver_wext_event_wireless_michaelmicfailure(
void *ctx, const char *ev, size_t len)
{
const struct iw_michaelmicfailure *mic;
union wpa_event_data data;
if (len < sizeof(*mic))
return -1;
mic = (const struct iw_michaelmicfailure *) ev;
wpa_printf(MSG_DEBUG, "Michael MIC failure wireless event: "
"flags=0x%x src_addr=" MACSTR, mic->flags,
MAC2STR(mic->src_addr.sa_data));
os_memset(&data, 0, sizeof(data));
data.michael_mic_failure.unicast = !(mic->flags & IW_MICFAILURE_GROUP);
wpa_supplicant_event(ctx, EVENT_MICHAEL_MIC_FAILURE, &data);
return 0;
}
static int wpa_driver_wext_event_wireless_pmkidcand(
struct wpa_driver_wext_data *drv, const char *ev, size_t len)
{
const struct iw_pmkid_cand *cand;
union wpa_event_data data;
const u8 *addr;
if (len < sizeof(*cand))
return -1;
cand = (const struct iw_pmkid_cand *) ev;
addr = (const u8 *) cand->bssid.sa_data;
wpa_printf(MSG_DEBUG, "PMKID candidate wireless event: "
"flags=0x%x index=%d bssid=" MACSTR, cand->flags,
cand->index, MAC2STR(addr));
os_memset(&data, 0, sizeof(data));
os_memcpy(data.pmkid_candidate.bssid, addr, ETH_ALEN);
data.pmkid_candidate.index = cand->index;
data.pmkid_candidate.preauth = cand->flags & IW_PMKID_CAND_PREAUTH;
wpa_supplicant_event(drv->ctx, EVENT_PMKID_CANDIDATE, &data);
return 0;
}
static int wpa_driver_wext_event_wireless_assocreqie(
struct wpa_driver_wext_data *drv, const char *ev, int len)
{
if (len < 0)
return -1;
wpa_hexdump(MSG_DEBUG, "AssocReq IE wireless event", (const u8 *) ev,
len);
os_free(drv->assoc_req_ies);
drv->assoc_req_ies = os_malloc(len);
if (drv->assoc_req_ies == NULL) {
drv->assoc_req_ies_len = 0;
return -1;
}
os_memcpy(drv->assoc_req_ies, ev, len);
drv->assoc_req_ies_len = len;
return 0;
}
static int wpa_driver_wext_event_wireless_assocrespie(
struct wpa_driver_wext_data *drv, const char *ev, int len)
{
if (len < 0)
return -1;
wpa_hexdump(MSG_DEBUG, "AssocResp IE wireless event", (const u8 *) ev,
len);
os_free(drv->assoc_resp_ies);
drv->assoc_resp_ies = os_malloc(len);
if (drv->assoc_resp_ies == NULL) {
drv->assoc_resp_ies_len = 0;
return -1;
}
os_memcpy(drv->assoc_resp_ies, ev, len);
drv->assoc_resp_ies_len = len;
return 0;
}
static void wpa_driver_wext_event_assoc_ies(struct wpa_driver_wext_data *drv)
{
union wpa_event_data data;
if (drv->assoc_req_ies == NULL && drv->assoc_resp_ies == NULL)
return;
os_memset(&data, 0, sizeof(data));
if (drv->assoc_req_ies) {
data.assoc_info.req_ies = drv->assoc_req_ies;
data.assoc_info.req_ies_len = drv->assoc_req_ies_len;
}
if (drv->assoc_resp_ies) {
data.assoc_info.resp_ies = drv->assoc_resp_ies;
data.assoc_info.resp_ies_len = drv->assoc_resp_ies_len;
}
wpa_supplicant_event(drv->ctx, EVENT_ASSOCINFO, &data);
os_free(drv->assoc_req_ies);
drv->assoc_req_ies = NULL;
os_free(drv->assoc_resp_ies);
drv->assoc_resp_ies = NULL;
}
static void wpa_driver_wext_event_wireless(struct wpa_driver_wext_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. */
os_memcpy(&iwe_buf, pos, IW_EV_LCP_LEN);
wpa_printf(MSG_DEBUG, "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_compiled > 18 &&
(iwe->cmd == IWEVMICHAELMICFAILURE ||
iwe->cmd == IWEVCUSTOM ||
iwe->cmd == IWEVASSOCREQIE ||
iwe->cmd == IWEVASSOCRESPIE ||
iwe->cmd == IWEVPMKIDCAND)) {
/* WE-19 removed the pointer from struct iw_point */
char *dpos = (char *) &iwe_buf.u.data.length;
int dlen = dpos - (char *) &iwe_buf;
os_memcpy(dpos, pos + IW_EV_LCP_LEN,
sizeof(struct iw_event) - dlen);
} else {
os_memcpy(&iwe_buf, pos, sizeof(struct iw_event));
custom += IW_EV_POINT_OFF;
}
switch (iwe->cmd) {
case SIOCGIWAP:
wpa_printf(MSG_DEBUG, "Wireless event: new AP: "
MACSTR,
MAC2STR((u8 *) iwe->u.ap_addr.sa_data));
if (is_zero_ether_addr(
(const u8 *) iwe->u.ap_addr.sa_data) ||
os_memcmp(iwe->u.ap_addr.sa_data,
"\x44\x44\x44\x44\x44\x44", ETH_ALEN) ==
0) {
os_free(drv->assoc_req_ies);
drv->assoc_req_ies = NULL;
os_free(drv->assoc_resp_ies);
drv->assoc_resp_ies = NULL;
wpa_supplicant_event(drv->ctx, EVENT_DISASSOC,
NULL);
} else {
wpa_driver_wext_event_assoc_ies(drv);
wpa_supplicant_event(drv->ctx, EVENT_ASSOC,
NULL);
}
break;
case IWEVMICHAELMICFAILURE:
if (custom + iwe->u.data.length > end) {
wpa_printf(MSG_DEBUG, "WEXT: Invalid "
"IWEVMICHAELMICFAILURE length");
return;
}
wpa_driver_wext_event_wireless_michaelmicfailure(
drv->ctx, custom, iwe->u.data.length);
break;
case IWEVCUSTOM:
if (custom + iwe->u.data.length > end) {
wpa_printf(MSG_DEBUG, "WEXT: Invalid "
"IWEVCUSTOM length");
return;
}
buf = dup_binstr(custom, iwe->u.data.length);
if (buf == NULL)
return;
wpa_driver_wext_event_wireless_custom(drv->ctx, buf);
os_free(buf);
break;
case SIOCGIWSCAN:
drv->scan_complete_events = 1;
eloop_cancel_timeout(wpa_driver_wext_scan_timeout,
drv, drv->ctx);
wpa_supplicant_event(drv->ctx, EVENT_SCAN_RESULTS,
NULL);
break;
case IWEVASSOCREQIE:
if (custom + iwe->u.data.length > end) {
wpa_printf(MSG_DEBUG, "WEXT: Invalid "
"IWEVASSOCREQIE length");
return;
}
wpa_driver_wext_event_wireless_assocreqie(
drv, custom, iwe->u.data.length);
break;
case IWEVASSOCRESPIE:
if (custom + iwe->u.data.length > end) {
wpa_printf(MSG_DEBUG, "WEXT: Invalid "
"IWEVASSOCRESPIE length");
return;
}
wpa_driver_wext_event_wireless_assocrespie(
drv, custom, iwe->u.data.length);
break;
case IWEVPMKIDCAND:
if (custom + iwe->u.data.length > end) {
wpa_printf(MSG_DEBUG, "WEXT: Invalid "
"IWEVPMKIDCAND length");
return;
}
wpa_driver_wext_event_wireless_pmkidcand(
drv, custom, iwe->u.data.length);
break;
}
pos += iwe->len;
}
}
static void wpa_driver_wext_event_link(struct wpa_driver_wext_data *drv,
char *buf, size_t len, int del)
{
union wpa_event_data event;
os_memset(&event, 0, sizeof(event));
if (len > sizeof(event.interface_status.ifname))
len = sizeof(event.interface_status.ifname) - 1;
os_memcpy(event.interface_status.ifname, buf, len);
event.interface_status.ievent = del ? EVENT_INTERFACE_REMOVED :
EVENT_INTERFACE_ADDED;
wpa_printf(MSG_DEBUG, "RTM_%sLINK, IFLA_IFNAME: Interface '%s' %s",
del ? "DEL" : "NEW",
event.interface_status.ifname,
del ? "removed" : "added");
if (os_strcmp(drv->ifname, event.interface_status.ifname) == 0) {
if (del) {
if (drv->if_removed) {
wpa_printf(MSG_DEBUG, "WEXT: if_removed "
"already set - ignore event");
return;
}
drv->if_removed = 1;
} else {
if (if_nametoindex(drv->ifname) == 0) {
wpa_printf(MSG_DEBUG, "WEXT: Interface %s "
"does not exist - ignore "
"RTM_NEWLINK",
drv->ifname);
return;
}
if (!drv->if_removed) {
wpa_printf(MSG_DEBUG, "WEXT: if_removed "
"already cleared - ignore event");
return;
}
drv->if_removed = 0;
}
}
wpa_supplicant_event(drv->ctx, EVENT_INTERFACE_STATUS, &event);
}
static int wpa_driver_wext_own_ifname(struct wpa_driver_wext_data *drv,
u8 *buf, size_t len)
{
int attrlen, rta_len;
struct rtattr *attr;
attrlen = len;
attr = (struct rtattr *) buf;
rta_len = RTA_ALIGN(sizeof(struct rtattr));
while (RTA_OK(attr, attrlen)) {
if (attr->rta_type == IFLA_IFNAME) {
if (os_strcmp(((char *) attr) + rta_len, drv->ifname)
== 0)
return 1;
else
break;
}
attr = RTA_NEXT(attr, attrlen);
}
return 0;
}
static int wpa_driver_wext_own_ifindex(struct wpa_driver_wext_data *drv,
int ifindex, u8 *buf, size_t len)
{
if (drv->ifindex == ifindex || drv->ifindex2 == ifindex)
return 1;
if (drv->if_removed && wpa_driver_wext_own_ifname(drv, buf, len)) {
drv->ifindex = if_nametoindex(drv->ifname);
wpa_printf(MSG_DEBUG, "WEXT: Update ifindex for a removed "
"interface");
wpa_driver_wext_finish_drv_init(drv);
return 1;
}
return 0;
}
static void wpa_driver_wext_event_rtm_newlink(void *ctx, struct ifinfomsg *ifi,
u8 *buf, size_t len)
{
struct wpa_driver_wext_data *drv = ctx;
int attrlen, rta_len;
struct rtattr *attr;
char namebuf[IFNAMSIZ];
if (!wpa_driver_wext_own_ifindex(drv, ifi->ifi_index, buf, len)) {
wpa_printf(MSG_DEBUG, "Ignore event for foreign ifindex %d",
ifi->ifi_index);
return;
}
wpa_printf(MSG_DEBUG, "RTM_NEWLINK: operstate=%d ifi_flags=0x%x "
"(%s%s%s%s)",
drv->operstate, ifi->ifi_flags,
(ifi->ifi_flags & IFF_UP) ? "[UP]" : "",
(ifi->ifi_flags & IFF_RUNNING) ? "[RUNNING]" : "",
(ifi->ifi_flags & IFF_LOWER_UP) ? "[LOWER_UP]" : "",
(ifi->ifi_flags & IFF_DORMANT) ? "[DORMANT]" : "");
if (!drv->if_disabled && !(ifi->ifi_flags & IFF_UP)) {
wpa_printf(MSG_DEBUG, "WEXT: Interface down");
drv->if_disabled = 1;
wpa_supplicant_event(drv->ctx, EVENT_INTERFACE_DISABLED, NULL);
}
if (drv->if_disabled && (ifi->ifi_flags & IFF_UP)) {
if (if_indextoname(ifi->ifi_index, namebuf) &&
linux_iface_up(drv->ioctl_sock, drv->ifname) == 0) {
wpa_printf(MSG_DEBUG, "WEXT: Ignore interface up "
"event since interface %s is down",
namebuf);
} else if (if_nametoindex(drv->ifname) == 0) {
wpa_printf(MSG_DEBUG, "WEXT: Ignore interface up "
"event since interface %s does not exist",
drv->ifname);
} else if (drv->if_removed) {
wpa_printf(MSG_DEBUG, "WEXT: Ignore interface up "
"event since interface %s is marked "
"removed", drv->ifname);
} else {
wpa_printf(MSG_DEBUG, "WEXT: Interface up");
drv->if_disabled = 0;
wpa_supplicant_event(drv->ctx, EVENT_INTERFACE_ENABLED,
NULL);
}
}
/*
* Some drivers send the association event before the operup event--in
* this case, lifting operstate in wpa_driver_wext_set_operstate()
* fails. This will hit us when wpa_supplicant does not need to do
* IEEE 802.1X authentication
*/
if (drv->operstate == 1 &&
(ifi->ifi_flags & (IFF_LOWER_UP | IFF_DORMANT)) == IFF_LOWER_UP &&
!(ifi->ifi_flags & IFF_RUNNING))
netlink_send_oper_ifla(drv->netlink, drv->ifindex,
-1, IF_OPER_UP);
attrlen = len;
attr = (struct rtattr *) buf;
rta_len = RTA_ALIGN(sizeof(struct rtattr));
while (RTA_OK(attr, attrlen)) {
if (attr->rta_type == IFLA_WIRELESS) {
wpa_driver_wext_event_wireless(
drv, ((char *) attr) + rta_len,
attr->rta_len - rta_len);
} else if (attr->rta_type == IFLA_IFNAME) {
wpa_driver_wext_event_link(drv,
((char *) attr) + rta_len,
attr->rta_len - rta_len, 0);
}
attr = RTA_NEXT(attr, attrlen);
}
}
static void wpa_driver_wext_event_rtm_dellink(void *ctx, struct ifinfomsg *ifi,
u8 *buf, size_t len)
{
struct wpa_driver_wext_data *drv = ctx;
int attrlen, rta_len;
struct rtattr *attr;
attrlen = len;
attr = (struct rtattr *) buf;
rta_len = RTA_ALIGN(sizeof(struct rtattr));
while (RTA_OK(attr, attrlen)) {
if (attr->rta_type == IFLA_IFNAME) {
wpa_driver_wext_event_link(drv,
((char *) attr) + rta_len,
attr->rta_len - rta_len, 1);
}
attr = RTA_NEXT(attr, attrlen);
}
}
static void wpa_driver_wext_rfkill_blocked(void *ctx)
{
wpa_printf(MSG_DEBUG, "WEXT: RFKILL blocked");
/*
* This may be for any interface; use ifdown event to disable
* interface.
*/
}
static void wpa_driver_wext_rfkill_unblocked(void *ctx)
{
struct wpa_driver_wext_data *drv = ctx;
wpa_printf(MSG_DEBUG, "WEXT: RFKILL unblocked");
if (linux_set_iface_flags(drv->ioctl_sock, drv->ifname, 1)) {
wpa_printf(MSG_DEBUG, "WEXT: Could not set interface UP "
"after rfkill unblock");
return;
}
/* rtnetlink ifup handler will report interface as enabled */
}
static void wext_get_phy_name(struct wpa_driver_wext_data *drv)
{
/* Find phy (radio) to which this interface belongs */
char buf[90], *pos;
int f, rv;
drv->phyname[0] = '\0';
snprintf(buf, sizeof(buf) - 1, "/sys/class/net/%s/phy80211/name",
drv->ifname);
f = open(buf, O_RDONLY);
if (f < 0) {
wpa_printf(MSG_DEBUG, "Could not open file %s: %s",
buf, strerror(errno));
return;
}
rv = read(f, drv->phyname, sizeof(drv->phyname) - 1);
close(f);
if (rv < 0) {
wpa_printf(MSG_DEBUG, "Could not read file %s: %s",
buf, strerror(errno));
return;
}
drv->phyname[rv] = '\0';
pos = os_strchr(drv->phyname, '\n');
if (pos)
*pos = '\0';
wpa_printf(MSG_DEBUG, "wext: interface %s phy: %s",
drv->ifname, drv->phyname);
}
/**
* wpa_driver_wext_init - Initialize WE driver interface
* @ctx: context to be used when calling wpa_supplicant functions,
* e.g., wpa_supplicant_event()
* @ifname: interface name, e.g., wlan0
* Returns: Pointer to private data, %NULL on failure
*/
void * wpa_driver_wext_init(void *ctx, const char *ifname)
{
struct wpa_driver_wext_data *drv;
struct netlink_config *cfg;
struct rfkill_config *rcfg;
char path[128];
struct stat buf;
drv = os_zalloc(sizeof(*drv));
if (drv == NULL)
return NULL;
drv->ctx = ctx;
os_strlcpy(drv->ifname, ifname, sizeof(drv->ifname));
os_snprintf(path, sizeof(path), "/sys/class/net/%s/phy80211", ifname);
if (stat(path, &buf) == 0) {
wpa_printf(MSG_DEBUG, "WEXT: cfg80211-based driver detected");
drv->cfg80211 = 1;
wext_get_phy_name(drv);
}
drv->ioctl_sock = socket(PF_INET, SOCK_DGRAM, 0);
if (drv->ioctl_sock < 0) {
perror("socket(PF_INET,SOCK_DGRAM)");
goto err1;
}
cfg = os_zalloc(sizeof(*cfg));
if (cfg == NULL)
goto err1;
cfg->ctx = drv;
cfg->newlink_cb = wpa_driver_wext_event_rtm_newlink;
cfg->dellink_cb = wpa_driver_wext_event_rtm_dellink;
drv->netlink = netlink_init(cfg);
if (drv->netlink == NULL) {
os_free(cfg);
goto err2;
}
rcfg = os_zalloc(sizeof(*rcfg));
if (rcfg == NULL)
goto err3;
rcfg->ctx = drv;
os_strlcpy(rcfg->ifname, ifname, sizeof(rcfg->ifname));
rcfg->blocked_cb = wpa_driver_wext_rfkill_blocked;
rcfg->unblocked_cb = wpa_driver_wext_rfkill_unblocked;
drv->rfkill = rfkill_init(rcfg);
if (drv->rfkill == NULL) {
wpa_printf(MSG_DEBUG, "WEXT: RFKILL status not available");
os_free(rcfg);
}
drv->mlme_sock = -1;
if (wpa_driver_wext_finish_drv_init(drv) < 0)
goto err3;
wpa_driver_wext_set_auth_param(drv, IW_AUTH_WPA_ENABLED, 1);
return drv;
err3:
rfkill_deinit(drv->rfkill);
netlink_deinit(drv->netlink);
err2:
close(drv->ioctl_sock);
err1:
os_free(drv);
return NULL;
}
static void wpa_driver_wext_send_rfkill(void *eloop_ctx, void *timeout_ctx)
{
wpa_supplicant_event(timeout_ctx, EVENT_INTERFACE_DISABLED, NULL);
}
static int wpa_driver_wext_finish_drv_init(struct wpa_driver_wext_data *drv)
{
int send_rfkill_event = 0;
if (linux_set_iface_flags(drv->ioctl_sock, drv->ifname, 1) < 0) {
if (rfkill_is_blocked(drv->rfkill)) {
wpa_printf(MSG_DEBUG, "WEXT: Could not yet enable "
"interface '%s' due to rfkill",
drv->ifname);
drv->if_disabled = 1;
send_rfkill_event = 1;
} else {
wpa_printf(MSG_ERROR, "WEXT: Could not set "
"interface '%s' UP", drv->ifname);
return -1;
}
}
/*
* Make sure that the driver does not have any obsolete PMKID entries.
*/
wpa_driver_wext_flush_pmkid(drv);
if (wpa_driver_wext_set_mode(drv, 0) < 0) {
wpa_printf(MSG_DEBUG, "Could not configure driver to use "
"managed mode");
/* Try to use it anyway */
}
wpa_driver_wext_get_range(drv);
/*
* Unlock the driver's BSSID and force to a random SSID to clear any
* previous association the driver might have when the supplicant
* starts up.
*/
wpa_driver_wext_disconnect(drv);
drv->ifindex = if_nametoindex(drv->ifname);
if (os_strncmp(drv->ifname, "wlan", 4) == 0) {
/*
* Host AP driver may use both wlan# and wifi# interface in
* wireless events. Since some of the versions included WE-18
* support, let's add the alternative ifindex also from
* driver_wext.c for the time being. This may be removed at
* some point once it is believed that old versions of the
* driver are not in use anymore.
*/
char ifname2[IFNAMSIZ + 1];
os_strlcpy(ifname2, drv->ifname, sizeof(ifname2));
os_memcpy(ifname2, "wifi", 4);
wpa_driver_wext_alternative_ifindex(drv, ifname2);
}
netlink_send_oper_ifla(drv->netlink, drv->ifindex,
1, IF_OPER_DORMANT);
if (send_rfkill_event) {
eloop_register_timeout(0, 0, wpa_driver_wext_send_rfkill,
drv, drv->ctx);
}
return 0;
}
/**
* wpa_driver_wext_deinit - Deinitialize WE driver interface
* @priv: Pointer to private wext data from wpa_driver_wext_init()
*
* Shut down driver interface and processing of driver events. Free
* private data buffer if one was allocated in wpa_driver_wext_init().
*/
void wpa_driver_wext_deinit(void *priv)
{
struct wpa_driver_wext_data *drv = priv;
wpa_driver_wext_set_auth_param(drv, IW_AUTH_WPA_ENABLED, 0);
eloop_cancel_timeout(wpa_driver_wext_scan_timeout, drv, drv->ctx);
/*
* Clear possibly configured driver parameters in order to make it
* easier to use the driver after wpa_supplicant has been terminated.
*/
wpa_driver_wext_disconnect(drv);
netlink_send_oper_ifla(drv->netlink, drv->ifindex, 0, IF_OPER_UP);
netlink_deinit(drv->netlink);
rfkill_deinit(drv->rfkill);
if (drv->mlme_sock >= 0)
eloop_unregister_read_sock(drv->mlme_sock);
(void) linux_set_iface_flags(drv->ioctl_sock, drv->ifname, 0);
close(drv->ioctl_sock);
if (drv->mlme_sock >= 0)
close(drv->mlme_sock);
os_free(drv->assoc_req_ies);
os_free(drv->assoc_resp_ies);
os_free(drv);
}
/**
* wpa_driver_wext_scan_timeout - Scan timeout to report scan completion
* @eloop_ctx: Unused
* @timeout_ctx: ctx argument given to wpa_driver_wext_init()
*
* This function can be used as registered timeout when starting a scan to
* generate a scan completed event if the driver does not report this.
*/
void wpa_driver_wext_scan_timeout(void *eloop_ctx, void *timeout_ctx)
{
wpa_printf(MSG_DEBUG, "Scan timeout - try to get results");
wpa_supplicant_event(timeout_ctx, EVENT_SCAN_RESULTS, NULL);
}
/**
* wpa_driver_wext_scan - Request the driver to initiate scan
* @priv: Pointer to private wext data from wpa_driver_wext_init()
* @param: Scan parameters (specific SSID to scan for (ProbeReq), etc.)
* Returns: 0 on success, -1 on failure
*/
int wpa_driver_wext_scan(void *priv, struct wpa_driver_scan_params *params)
{
struct wpa_driver_wext_data *drv = priv;
struct iwreq iwr;
int ret = 0, timeout;
struct iw_scan_req req;
const u8 *ssid = params->ssids[0].ssid;
size_t ssid_len = params->ssids[0].ssid_len;
if (ssid_len > IW_ESSID_MAX_SIZE) {
wpa_printf(MSG_DEBUG, "%s: too long SSID (%lu)",
__FUNCTION__, (unsigned long) ssid_len);
return -1;
}
os_memset(&iwr, 0, sizeof(iwr));
os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
if (ssid && ssid_len) {
os_memset(&req, 0, sizeof(req));
req.essid_len = ssid_len;
req.bssid.sa_family = ARPHRD_ETHER;
os_memset(req.bssid.sa_data, 0xff, ETH_ALEN);
os_memcpy(req.essid, ssid, ssid_len);
iwr.u.data.pointer = (caddr_t) &req;
iwr.u.data.length = sizeof(req);
iwr.u.data.flags = IW_SCAN_THIS_ESSID;
}
if (ioctl(drv->ioctl_sock, SIOCSIWSCAN, &iwr) < 0) {
perror("ioctl[SIOCSIWSCAN]");
ret = -1;
}
/* Not all drivers generate "scan completed" wireless event, so try to
* read results after a timeout. */
timeout = 10;
if (drv->scan_complete_events) {
/*
* The driver seems to deliver SIOCGIWSCAN events to notify
* when scan is complete, so use longer timeout to avoid race
* conditions with scanning and following association request.
*/
timeout = 30;
}
wpa_printf(MSG_DEBUG, "Scan requested (ret=%d) - scan timeout %d "
"seconds", ret, timeout);
eloop_cancel_timeout(wpa_driver_wext_scan_timeout, drv, drv->ctx);
eloop_register_timeout(timeout, 0, wpa_driver_wext_scan_timeout, drv,
drv->ctx);
return ret;
}
static u8 * wpa_driver_wext_giwscan(struct wpa_driver_wext_data *drv,
size_t *len)
{
struct iwreq iwr;
u8 *res_buf;
size_t res_buf_len;
res_buf_len = IW_SCAN_MAX_DATA;
for (;;) {
res_buf = os_malloc(res_buf_len);
if (res_buf == NULL)
return NULL;
os_memset(&iwr, 0, sizeof(iwr));
os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
iwr.u.data.pointer = res_buf;
iwr.u.data.length = res_buf_len;
if (ioctl(drv->ioctl_sock, SIOCGIWSCAN, &iwr) == 0)
break;
if (errno == E2BIG && res_buf_len < 65535) {
os_free(res_buf);
res_buf = NULL;
res_buf_len *= 2;
if (res_buf_len > 65535)
res_buf_len = 65535; /* 16-bit length field */
wpa_printf(MSG_DEBUG, "Scan results did not fit - "
"trying larger buffer (%lu bytes)",
(unsigned long) res_buf_len);
} else {
perror("ioctl[SIOCGIWSCAN]");
os_free(res_buf);
return NULL;
}
}
if (iwr.u.data.length > res_buf_len) {
os_free(res_buf);
return NULL;
}
*len = iwr.u.data.length;
return res_buf;
}
/*
* Data structure for collecting WEXT scan results. This is needed to allow
* the various methods of reporting IEs to be combined into a single IE buffer.
*/
struct wext_scan_data {
struct wpa_scan_res res;
u8 *ie;
size_t ie_len;
u8 ssid[32];
size_t ssid_len;
int maxrate;
};
static void wext_get_scan_mode(struct iw_event *iwe,
struct wext_scan_data *res)
{
if (iwe->u.mode == IW_MODE_ADHOC)
res->res.caps |= IEEE80211_CAP_IBSS;
else if (iwe->u.mode == IW_MODE_MASTER || iwe->u.mode == IW_MODE_INFRA)
res->res.caps |= IEEE80211_CAP_ESS;
}
static void wext_get_scan_ssid(struct iw_event *iwe,
struct wext_scan_data *res, char *custom,
char *end)
{
int ssid_len = iwe->u.essid.length;
if (custom + ssid_len > end)
return;
if (iwe->u.essid.flags &&
ssid_len > 0 &&
ssid_len <= IW_ESSID_MAX_SIZE) {
os_memcpy(res->ssid, custom, ssid_len);
res->ssid_len = ssid_len;
}
}
static void wext_get_scan_freq(struct iw_event *iwe,
struct wext_scan_data *res)
{
int divi = 1000000, i;
if (iwe->u.freq.e == 0) {
/*
* Some drivers do not report frequency, but a channel.
* Try to map this to frequency by assuming they are using
* IEEE 802.11b/g. But don't overwrite a previously parsed
* frequency if the driver sends both frequency and channel,
* since the driver may be sending an A-band channel that we
* don't handle here.
*/
if (res->res.freq)
return;
if (iwe->u.freq.m >= 1 && iwe->u.freq.m <= 13) {
res->res.freq = 2407 + 5 * iwe->u.freq.m;
return;
} else if (iwe->u.freq.m == 14) {
res->res.freq = 2484;
return;
}
}
if (iwe->u.freq.e > 6) {
wpa_printf(MSG_DEBUG, "Invalid freq in scan results (BSSID="
MACSTR " m=%d e=%d)",
MAC2STR(res->res.bssid), iwe->u.freq.m,
iwe->u.freq.e);
return;
}
for (i = 0; i < iwe->u.freq.e; i++)
divi /= 10;
res->res.freq = iwe->u.freq.m / divi;
}
static void wext_get_scan_qual(struct wpa_driver_wext_data *drv,
struct iw_event *iwe,
struct wext_scan_data *res)
{
res->res.qual = iwe->u.qual.qual;
res->res.noise = iwe->u.qual.noise;
res->res.level = iwe->u.qual.level;
if (iwe->u.qual.updated & IW_QUAL_QUAL_INVALID)
res->res.flags |= WPA_SCAN_QUAL_INVALID;
if (iwe->u.qual.updated & IW_QUAL_LEVEL_INVALID)
res->res.flags |= WPA_SCAN_LEVEL_INVALID;
if (iwe->u.qual.updated & IW_QUAL_NOISE_INVALID)
res->res.flags |= WPA_SCAN_NOISE_INVALID;
if (iwe->u.qual.updated & IW_QUAL_DBM)
res->res.flags |= WPA_SCAN_LEVEL_DBM;
if ((iwe->u.qual.updated & IW_QUAL_DBM) ||
((iwe->u.qual.level != 0) &&
(iwe->u.qual.level > drv->max_level))) {
if (iwe->u.qual.level >= 64)
res->res.level -= 0x100;
if (iwe->u.qual.noise >= 64)
res->res.noise -= 0x100;
}
}
static void wext_get_scan_encode(struct iw_event *iwe,
struct wext_scan_data *res)
{
if (!(iwe->u.data.flags & IW_ENCODE_DISABLED))
res->res.caps |= IEEE80211_CAP_PRIVACY;
}
static void wext_get_scan_rate(struct iw_event *iwe,
struct wext_scan_data *res, char *pos,
char *end)
{
int maxrate;
char *custom = pos + IW_EV_LCP_LEN;
struct iw_param p;
size_t clen;
clen = iwe->len;
if (custom + clen > end)
return;
maxrate = 0;
while (((ssize_t) clen) >= (ssize_t) sizeof(struct iw_param)) {
/* Note: may be misaligned, make a local, aligned copy */
os_memcpy(&p, custom, sizeof(struct iw_param));
if (p.value > maxrate)
maxrate = p.value;
clen -= sizeof(struct iw_param);
custom += sizeof(struct iw_param);
}
/* Convert the maxrate from WE-style (b/s units) to
* 802.11 rates (500000 b/s units).
*/
res->maxrate = maxrate / 500000;
}
static void wext_get_scan_iwevgenie(struct iw_event *iwe,
struct wext_scan_data *res, char *custom,
char *end)
{
char *genie, *gpos, *gend;
u8 *tmp;
if (iwe->u.data.length == 0)
return;
gpos = genie = custom;
gend = genie + iwe->u.data.length;
if (gend > end) {
wpa_printf(MSG_INFO, "IWEVGENIE overflow");
return;
}
tmp = os_realloc(res->ie, res->ie_len + gend - gpos);
if (tmp == NULL)
return;
os_memcpy(tmp + res->ie_len, gpos, gend - gpos);
res->ie = tmp;
res->ie_len += gend - gpos;
}
static void wext_get_scan_custom(struct iw_event *iwe,
struct wext_scan_data *res, char *custom,
char *end)
{
size_t clen;
u8 *tmp;
clen = iwe->u.data.length;
if (custom + clen > end)
return;
if (clen > 7 && os_strncmp(custom, "wpa_ie=", 7) == 0) {
char *spos;
int bytes;
spos = custom + 7;
bytes = custom + clen - spos;
if (bytes & 1 || bytes == 0)
return;
bytes /= 2;
tmp = os_realloc(res->ie, res->ie_len + bytes);
if (tmp == NULL)
return;
res->ie = tmp;
if (hexstr2bin(spos, tmp + res->ie_len, bytes) < 0)
return;
res->ie_len += bytes;
} else if (clen > 7 && os_strncmp(custom, "rsn_ie=", 7) == 0) {
char *spos;
int bytes;
spos = custom + 7;
bytes = custom + clen - spos;
if (bytes & 1 || bytes == 0)
return;
bytes /= 2;
tmp = os_realloc(res->ie, res->ie_len + bytes);
if (tmp == NULL)
return;
res->ie = tmp;
if (hexstr2bin(spos, tmp + res->ie_len, bytes) < 0)
return;
res->ie_len += bytes;
} else if (clen > 4 && os_strncmp(custom, "tsf=", 4) == 0) {
char *spos;
int bytes;
u8 bin[8];
spos = custom + 4;
bytes = custom + clen - spos;
if (bytes != 16) {
wpa_printf(MSG_INFO, "Invalid TSF length (%d)", bytes);
return;
}
bytes /= 2;
if (hexstr2bin(spos, bin, bytes) < 0) {
wpa_printf(MSG_DEBUG, "WEXT: Invalid TSF value");
return;
}
res->res.tsf += WPA_GET_BE64(bin);
}
}
static int wext_19_iw_point(struct wpa_driver_wext_data *drv, u16 cmd)
{
return drv->we_version_compiled > 18 &&
(cmd == SIOCGIWESSID || cmd == SIOCGIWENCODE ||
cmd == IWEVGENIE || cmd == IWEVCUSTOM);
}
static void wpa_driver_wext_add_scan_entry(struct wpa_scan_results *res,
struct wext_scan_data *data)
{
struct wpa_scan_res **tmp;
struct wpa_scan_res *r;
size_t extra_len;
u8 *pos, *end, *ssid_ie = NULL, *rate_ie = NULL;
/* Figure out whether we need to fake any IEs */
pos = data->ie;
end = pos + data->ie_len;
while (pos && pos + 1 < end) {
if (pos + 2 + pos[1] > end)
break;
if (pos[0] == WLAN_EID_SSID)
ssid_ie = pos;
else if (pos[0] == WLAN_EID_SUPP_RATES)
rate_ie = pos;
else if (pos[0] == WLAN_EID_EXT_SUPP_RATES)
rate_ie = pos;
pos += 2 + pos[1];
}
extra_len = 0;
if (ssid_ie == NULL)
extra_len += 2 + data->ssid_len;
if (rate_ie == NULL && data->maxrate)
extra_len += 3;
r = os_zalloc(sizeof(*r) + extra_len + data->ie_len);
if (r == NULL)
return;
os_memcpy(r, &data->res, sizeof(*r));
r->ie_len = extra_len + data->ie_len;
pos = (u8 *) (r + 1);
if (ssid_ie == NULL) {
/*
* Generate a fake SSID IE since the driver did not report
* a full IE list.
*/
*pos++ = WLAN_EID_SSID;
*pos++ = data->ssid_len;
os_memcpy(pos, data->ssid, data->ssid_len);
pos += data->ssid_len;
}
if (rate_ie == NULL && data->maxrate) {
/*
* Generate a fake Supported Rates IE since the driver did not
* report a full IE list.
*/
*pos++ = WLAN_EID_SUPP_RATES;
*pos++ = 1;
*pos++ = data->maxrate;
}
if (data->ie)
os_memcpy(pos, data->ie, data->ie_len);
tmp = os_realloc_array(res->res, res->num + 1,
sizeof(struct wpa_scan_res *));
if (tmp == NULL) {
os_free(r);
return;
}
tmp[res->num++] = r;
res->res = tmp;
}
/**
* wpa_driver_wext_get_scan_results - Fetch the latest scan results
* @priv: Pointer to private wext data from wpa_driver_wext_init()
* Returns: Scan results on success, -1 on failure
*/
struct wpa_scan_results * wpa_driver_wext_get_scan_results(void *priv)
{
struct wpa_driver_wext_data *drv = priv;
size_t len;
int first;
u8 *res_buf;
struct iw_event iwe_buf, *iwe = &iwe_buf;
char *pos, *end, *custom;
struct wpa_scan_results *res;
struct wext_scan_data data;
res_buf = wpa_driver_wext_giwscan(drv, &len);
if (res_buf == NULL)
return NULL;
first = 1;
res = os_zalloc(sizeof(*res));
if (res == NULL) {
os_free(res_buf);
return NULL;
}
pos = (char *) res_buf;
end = (char *) res_buf + len;
os_memset(&data, 0, sizeof(data));
while (pos + IW_EV_LCP_LEN <= end) {
/* Event data may be unaligned, so make a local, aligned copy
* before processing. */
os_memcpy(&iwe_buf, pos, IW_EV_LCP_LEN);
if (iwe->len <= IW_EV_LCP_LEN)
break;
custom = pos + IW_EV_POINT_LEN;
if (wext_19_iw_point(drv, iwe->cmd)) {
/* WE-19 removed the pointer from struct iw_point */
char *dpos = (char *) &iwe_buf.u.data.length;
int dlen = dpos - (char *) &iwe_buf;
os_memcpy(dpos, pos + IW_EV_LCP_LEN,
sizeof(struct iw_event) - dlen);
} else {
os_memcpy(&iwe_buf, pos, sizeof(struct iw_event));
custom += IW_EV_POINT_OFF;
}
switch (iwe->cmd) {
case SIOCGIWAP:
if (!first)
wpa_driver_wext_add_scan_entry(res, &data);
first = 0;
os_free(data.ie);
os_memset(&data, 0, sizeof(data));
os_memcpy(data.res.bssid,
iwe->u.ap_addr.sa_data, ETH_ALEN);
break;
case SIOCGIWMODE:
wext_get_scan_mode(iwe, &data);
break;
case SIOCGIWESSID:
wext_get_scan_ssid(iwe, &data, custom, end);
break;
case SIOCGIWFREQ:
wext_get_scan_freq(iwe, &data);
break;
case IWEVQUAL:
wext_get_scan_qual(drv, iwe, &data);
break;
case SIOCGIWENCODE:
wext_get_scan_encode(iwe, &data);
break;
case SIOCGIWRATE:
wext_get_scan_rate(iwe, &data, pos, end);
break;
case IWEVGENIE:
wext_get_scan_iwevgenie(iwe, &data, custom, end);
break;
case IWEVCUSTOM:
wext_get_scan_custom(iwe, &data, custom, end);
break;
}
pos += iwe->len;
}
os_free(res_buf);
res_buf = NULL;
if (!first)
wpa_driver_wext_add_scan_entry(res, &data);
os_free(data.ie);
wpa_printf(MSG_DEBUG, "Received %lu bytes of scan results (%lu BSSes)",
(unsigned long) len, (unsigned long) res->num);
return res;
}
static int wpa_driver_wext_get_range(void *priv)
{
struct wpa_driver_wext_data *drv = priv;
struct iw_range *range;
struct iwreq iwr;
int minlen;
size_t buflen;
/*
* 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;
os_memset(&iwr, 0, sizeof(iwr));
os_strlcpy(iwr.ifr_name, drv->ifname, 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]");
os_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->has_capability = 1;
drv->we_version_compiled = range->we_version_compiled;
if (range->enc_capa & IW_ENC_CAPA_WPA) {
drv->capa.key_mgmt |= WPA_DRIVER_CAPA_KEY_MGMT_WPA |
WPA_DRIVER_CAPA_KEY_MGMT_WPA_PSK;
}
if (range->enc_capa & IW_ENC_CAPA_WPA2) {
drv->capa.key_mgmt |= WPA_DRIVER_CAPA_KEY_MGMT_WPA2 |
WPA_DRIVER_CAPA_KEY_MGMT_WPA2_PSK;
}
drv->capa.enc |= WPA_DRIVER_CAPA_ENC_WEP40 |
WPA_DRIVER_CAPA_ENC_WEP104;
drv->capa.enc |= WPA_DRIVER_CAPA_ENC_WEP128;
if (range->enc_capa & IW_ENC_CAPA_CIPHER_TKIP)
drv->capa.enc |= WPA_DRIVER_CAPA_ENC_TKIP;
if (range->enc_capa & IW_ENC_CAPA_CIPHER_CCMP)
drv->capa.enc |= WPA_DRIVER_CAPA_ENC_CCMP;
if (range->enc_capa & IW_ENC_CAPA_4WAY_HANDSHAKE)
drv->capa.flags |= WPA_DRIVER_FLAGS_4WAY_HANDSHAKE;
drv->capa.auth = WPA_DRIVER_AUTH_OPEN |
WPA_DRIVER_AUTH_SHARED |
WPA_DRIVER_AUTH_LEAP;
drv->capa.max_scan_ssids = 1;
wpa_printf(MSG_DEBUG, " capabilities: key_mgmt 0x%x enc 0x%x "
"flags 0x%llx",
drv->capa.key_mgmt, drv->capa.enc,
(unsigned long long) drv->capa.flags);
} else {
wpa_printf(MSG_DEBUG, "SIOCGIWRANGE: too old (short) data - "
"assuming WPA is not supported");
}
drv->max_level = range->max_qual.level;
os_free(range);
return 0;
}
static int wpa_driver_wext_set_psk(struct wpa_driver_wext_data *drv,
const u8 *psk)
{
struct iw_encode_ext *ext;
struct iwreq iwr;
int ret;
wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
if (!(drv->capa.flags & WPA_DRIVER_FLAGS_4WAY_HANDSHAKE))
return 0;
if (!psk)
return 0;
os_memset(&iwr, 0, sizeof(iwr));
os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
ext = os_zalloc(sizeof(*ext) + PMK_LEN);
if (ext == NULL)
return -1;
iwr.u.encoding.pointer = (caddr_t) ext;
iwr.u.encoding.length = sizeof(*ext) + PMK_LEN;
ext->key_len = PMK_LEN;
os_memcpy(&ext->key, psk, ext->key_len);
ext->alg = IW_ENCODE_ALG_PMK;
ret = ioctl(drv->ioctl_sock, SIOCSIWENCODEEXT, &iwr);
if (ret < 0)
perror("ioctl[SIOCSIWENCODEEXT] PMK");
os_free(ext);
return ret;
}
static int wpa_driver_wext_set_key_ext(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 wpa_driver_wext_data *drv = priv;
struct iwreq iwr;
int ret = 0;
struct iw_encode_ext *ext;
if (seq_len > IW_ENCODE_SEQ_MAX_SIZE) {
wpa_printf(MSG_DEBUG, "%s: Invalid seq_len %lu",
__FUNCTION__, (unsigned long) seq_len);
return -1;
}
ext = os_zalloc(sizeof(*ext) + key_len);
if (ext == NULL)
return -1;
os_memset(&iwr, 0, sizeof(iwr));
os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
iwr.u.encoding.flags = key_idx + 1;
iwr.u.encoding.flags |= IW_ENCODE_TEMP;
if (alg == WPA_ALG_NONE)
iwr.u.encoding.flags |= IW_ENCODE_DISABLED;
iwr.u.encoding.pointer = (caddr_t) ext;
iwr.u.encoding.length = sizeof(*ext) + key_len;
if (addr == NULL || is_broadcast_ether_addr(addr))
ext->ext_flags |= IW_ENCODE_EXT_GROUP_KEY;
if (set_tx)
ext->ext_flags |= IW_ENCODE_EXT_SET_TX_KEY;
ext->addr.sa_family = ARPHRD_ETHER;
if (addr)
os_memcpy(ext->addr.sa_data, addr, ETH_ALEN);
else
os_memset(ext->addr.sa_data, 0xff, ETH_ALEN);
if (key && key_len) {
os_memcpy(ext + 1, key, key_len);
ext->key_len = key_len;
}
switch (alg) {
case WPA_ALG_NONE:
ext->alg = IW_ENCODE_ALG_NONE;
break;
case WPA_ALG_WEP:
ext->alg = IW_ENCODE_ALG_WEP;
break;
case WPA_ALG_TKIP:
ext->alg = IW_ENCODE_ALG_TKIP;
break;
case WPA_ALG_CCMP:
ext->alg = IW_ENCODE_ALG_CCMP;
break;
case WPA_ALG_PMK:
ext->alg = IW_ENCODE_ALG_PMK;
break;
#ifdef CONFIG_IEEE80211W
case WPA_ALG_IGTK:
ext->alg = IW_ENCODE_ALG_AES_CMAC;
break;
#endif /* CONFIG_IEEE80211W */
default:
wpa_printf(MSG_DEBUG, "%s: Unknown algorithm %d",
__FUNCTION__, alg);
os_free(ext);
return -1;
}
if (seq && seq_len) {
ext->ext_flags |= IW_ENCODE_EXT_RX_SEQ_VALID;
os_memcpy(ext->rx_seq, seq, seq_len);
}
if (ioctl(drv->ioctl_sock, SIOCSIWENCODEEXT, &iwr) < 0) {
ret = errno == EOPNOTSUPP ? -2 : -1;
if (errno == ENODEV) {
/*
* ndiswrapper seems to be returning incorrect error
* code.. */
ret = -2;
}
perror("ioctl[SIOCSIWENCODEEXT]");
}
os_free(ext);
return ret;
}
/**
* wpa_driver_wext_set_key - Configure encryption key
* @priv: Pointer to private wext data from wpa_driver_wext_init()
* @priv: Private driver interface data
* @alg: Encryption algorithm (%WPA_ALG_NONE, %WPA_ALG_WEP,
* %WPA_ALG_TKIP, %WPA_ALG_CCMP); %WPA_ALG_NONE clears the key.
* @addr: Address of the peer STA or ff:ff:ff:ff:ff:ff for
* broadcast/default keys
* @key_idx: key index (0..3), usually 0 for unicast keys
* @set_tx: Configure this key as the default Tx key (only used when
* driver does not support separate unicast/individual key
* @seq: Sequence number/packet number, seq_len octets, the next
* packet number to be used for in replay protection; configured
* for Rx keys (in most cases, this is only used with broadcast
* keys and set to zero for unicast keys)
* @seq_len: Length of the seq, depends on the algorithm:
* TKIP: 6 octets, CCMP: 6 octets
* @key: Key buffer; TKIP: 16-byte temporal key, 8-byte Tx Mic key,
* 8-byte Rx Mic Key
* @key_len: Length of the key buffer in octets (WEP: 5 or 13,
* TKIP: 32, CCMP: 16)
* Returns: 0 on success, -1 on failure
*
* This function uses SIOCSIWENCODEEXT by default, but tries to use
* SIOCSIWENCODE if the extended ioctl fails when configuring a WEP key.
*/
int wpa_driver_wext_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 wpa_driver_wext_data *drv = priv;
struct iwreq iwr;
int ret = 0;
wpa_printf(MSG_DEBUG, "%s: alg=%d key_idx=%d set_tx=%d seq_len=%lu "
"key_len=%lu",
__FUNCTION__, alg, key_idx, set_tx,
(unsigned long) seq_len, (unsigned long) key_len);
ret = wpa_driver_wext_set_key_ext(drv, alg, addr, key_idx, set_tx,
seq, seq_len, key, key_len);
if (ret == 0)
return 0;
if (ret == -2 &&
(alg == WPA_ALG_NONE || alg == WPA_ALG_WEP)) {
wpa_printf(MSG_DEBUG, "Driver did not support "
"SIOCSIWENCODEEXT, trying SIOCSIWENCODE");
ret = 0;
} else {
wpa_printf(MSG_DEBUG, "Driver did not support "
"SIOCSIWENCODEEXT");
return ret;
}
os_memset(&iwr, 0, sizeof(iwr));
os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
iwr.u.encoding.flags = key_idx + 1;
iwr.u.encoding.flags |= IW_ENCODE_TEMP;
if (alg == WPA_ALG_NONE)
iwr.u.encoding.flags |= IW_ENCODE_DISABLED;
iwr.u.encoding.pointer = (caddr_t) key;
iwr.u.encoding.length = key_len;
if (ioctl(drv->ioctl_sock, SIOCSIWENCODE, &iwr) < 0) {
perror("ioctl[SIOCSIWENCODE]");
ret = -1;
}
if (set_tx && alg != WPA_ALG_NONE) {
os_memset(&iwr, 0, sizeof(iwr));
os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
iwr.u.encoding.flags = key_idx + 1;
iwr.u.encoding.flags |= IW_ENCODE_TEMP;
iwr.u.encoding.pointer = (caddr_t) NULL;
iwr.u.encoding.length = 0;
if (ioctl(drv->ioctl_sock, SIOCSIWENCODE, &iwr) < 0) {
perror("ioctl[SIOCSIWENCODE] (set_tx)");
ret = -1;
}
}
return ret;
}
static int wpa_driver_wext_set_countermeasures(void *priv,
int enabled)
{
struct wpa_driver_wext_data *drv = priv;
wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
return wpa_driver_wext_set_auth_param(drv,
IW_AUTH_TKIP_COUNTERMEASURES,
enabled);
}
static int wpa_driver_wext_set_drop_unencrypted(void *priv,
int enabled)
{
struct wpa_driver_wext_data *drv = priv;
wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
drv->use_crypt = enabled;
return wpa_driver_wext_set_auth_param(drv, IW_AUTH_DROP_UNENCRYPTED,
enabled);
}
static int wpa_driver_wext_mlme(struct wpa_driver_wext_data *drv,
const u8 *addr, int cmd, int reason_code)
{
struct iwreq iwr;
struct iw_mlme mlme;
int ret = 0;
os_memset(&iwr, 0, sizeof(iwr));
os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
os_memset(&mlme, 0, sizeof(mlme));
mlme.cmd = cmd;
mlme.reason_code = reason_code;
mlme.addr.sa_family = ARPHRD_ETHER;
os_memcpy(mlme.addr.sa_data, addr, ETH_ALEN);
iwr.u.data.pointer = (caddr_t) &mlme;
iwr.u.data.length = sizeof(mlme);
if (ioctl(drv->ioctl_sock, SIOCSIWMLME, &iwr) < 0) {
perror("ioctl[SIOCSIWMLME]");
ret = -1;
}
return ret;
}
static void wpa_driver_wext_disconnect(struct wpa_driver_wext_data *drv)
{
struct iwreq iwr;
const u8 null_bssid[ETH_ALEN] = { 0, 0, 0, 0, 0, 0 };
u8 ssid[32];
int i;
/*
* Only force-disconnect when the card is in infrastructure mode,
* otherwise the driver might interpret the cleared BSSID and random
* SSID as an attempt to create a new ad-hoc network.
*/
os_memset(&iwr, 0, sizeof(iwr));
os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
if (ioctl(drv->ioctl_sock, SIOCGIWMODE, &iwr) < 0) {
perror("ioctl[SIOCGIWMODE]");
iwr.u.mode = IW_MODE_INFRA;
}
if (iwr.u.mode == IW_MODE_INFRA) {
/* Clear the BSSID selection */
if (wpa_driver_wext_set_bssid(drv, null_bssid) < 0) {
wpa_printf(MSG_DEBUG, "WEXT: Failed to clear BSSID "
"selection on disconnect");
}
if (drv->cfg80211) {
/*
* cfg80211 supports SIOCSIWMLME commands, so there is
* no need for the random SSID hack, but clear the
* SSID.
*/
if (wpa_driver_wext_set_ssid(drv, (u8 *) "", 0) < 0) {
wpa_printf(MSG_DEBUG, "WEXT: Failed to clear "
"SSID on disconnect");
}
return;
}
/*
* Set a random SSID to make sure the driver will not be trying
* to associate with something even if it does not understand
* SIOCSIWMLME commands (or tries to associate automatically
* after deauth/disassoc).
*/
for (i = 0; i < 32; i++)
ssid[i] = rand() & 0xFF;
if (wpa_driver_wext_set_ssid(drv, ssid, 32) < 0) {
wpa_printf(MSG_DEBUG, "WEXT: Failed to set bogus "
"SSID to disconnect");
}
}
}
static int wpa_driver_wext_deauthenticate(void *priv, const u8 *addr,
int reason_code)
{
struct wpa_driver_wext_data *drv = priv;
int ret;
wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
ret = wpa_driver_wext_mlme(drv, addr, IW_MLME_DEAUTH, reason_code);
wpa_driver_wext_disconnect(drv);
return ret;
}
static int wpa_driver_wext_set_gen_ie(void *priv, const u8 *ie,
size_t ie_len)
{
struct wpa_driver_wext_data *drv = priv;
struct iwreq iwr;
int ret = 0;
os_memset(&iwr, 0, sizeof(iwr));
os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
iwr.u.data.pointer = (caddr_t) ie;
iwr.u.data.length = ie_len;
if (ioctl(drv->ioctl_sock, SIOCSIWGENIE, &iwr) < 0) {
perror("ioctl[SIOCSIWGENIE]");
ret = -1;
}
return ret;
}
int wpa_driver_wext_cipher2wext(int cipher)
{
switch (cipher) {
case WPA_CIPHER_NONE:
return IW_AUTH_CIPHER_NONE;
case WPA_CIPHER_WEP40:
return IW_AUTH_CIPHER_WEP40;
case WPA_CIPHER_TKIP:
return IW_AUTH_CIPHER_TKIP;
case WPA_CIPHER_CCMP:
return IW_AUTH_CIPHER_CCMP;
case WPA_CIPHER_WEP104:
return IW_AUTH_CIPHER_WEP104;
default:
return 0;
}
}
int wpa_driver_wext_keymgmt2wext(int keymgmt)
{
switch (keymgmt) {
case WPA_KEY_MGMT_IEEE8021X:
case WPA_KEY_MGMT_IEEE8021X_NO_WPA:
return IW_AUTH_KEY_MGMT_802_1X;
case WPA_KEY_MGMT_PSK:
return IW_AUTH_KEY_MGMT_PSK;
default:
return 0;
}
}
static int
wpa_driver_wext_auth_alg_fallback(struct wpa_driver_wext_data *drv,
struct wpa_driver_associate_params *params)
{
struct iwreq iwr;
int ret = 0;
wpa_printf(MSG_DEBUG, "WEXT: Driver did not support "
"SIOCSIWAUTH for AUTH_ALG, trying SIOCSIWENCODE");
os_memset(&iwr, 0, sizeof(iwr));
os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
/* Just changing mode, not actual keys */
iwr.u.encoding.flags = 0;
iwr.u.encoding.pointer = (caddr_t) NULL;
iwr.u.encoding.length = 0;
/*
* Note: IW_ENCODE_{OPEN,RESTRICTED} can be interpreted to mean two
* different things. Here they are used to indicate Open System vs.
* Shared Key authentication algorithm. However, some drivers may use
* them to select between open/restricted WEP encrypted (open = allow
* both unencrypted and encrypted frames; restricted = only allow
* encrypted frames).
*/
if (!drv->use_crypt) {
iwr.u.encoding.flags |= IW_ENCODE_DISABLED;
} else {
if (params->auth_alg & WPA_AUTH_ALG_OPEN)
iwr.u.encoding.flags |= IW_ENCODE_OPEN;
if (params->auth_alg & WPA_AUTH_ALG_SHARED)
iwr.u.encoding.flags |= IW_ENCODE_RESTRICTED;
}
if (ioctl(drv->ioctl_sock, SIOCSIWENCODE, &iwr) < 0) {
perror("ioctl[SIOCSIWENCODE]");
ret = -1;
}
return ret;
}
int wpa_driver_wext_associate(void *priv,
struct wpa_driver_associate_params *params)
{
struct wpa_driver_wext_data *drv = priv;
int ret = 0;
int allow_unencrypted_eapol;
int value;
wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
if (drv->cfg80211) {
/*
* Stop cfg80211 from trying to associate before we are done
* with all parameters.
*/
if (wpa_driver_wext_set_ssid(drv, (u8 *) "", 0) < 0) {
wpa_printf(MSG_DEBUG,
"WEXT: Failed to clear SSID to stop pending cfg80211 association attempts (if any)");
/* continue anyway */
}
}
if (wpa_driver_wext_set_drop_unencrypted(drv, params->drop_unencrypted)
< 0)
ret = -1;
if (wpa_driver_wext_set_auth_alg(drv, params->auth_alg) < 0)
ret = -1;
if (wpa_driver_wext_set_mode(drv, params->mode) < 0)
ret = -1;
/*
* If the driver did not support SIOCSIWAUTH, fallback to
* SIOCSIWENCODE here.
*/
if (drv->auth_alg_fallback &&
wpa_driver_wext_auth_alg_fallback(drv, params) < 0)
ret = -1;
if (!params->bssid &&
wpa_driver_wext_set_bssid(drv, NULL) < 0)
ret = -1;
/* TODO: should consider getting wpa version and cipher/key_mgmt suites
* from configuration, not from here, where only the selected suite is
* available */
if (wpa_driver_wext_set_gen_ie(drv, params->wpa_ie, params->wpa_ie_len)
< 0)
ret = -1;
if (params->wpa_ie == NULL || params->wpa_ie_len == 0)
value = IW_AUTH_WPA_VERSION_DISABLED;
else if (params->wpa_ie[0] == WLAN_EID_RSN)
value = IW_AUTH_WPA_VERSION_WPA2;
else
value = IW_AUTH_WPA_VERSION_WPA;
if (wpa_driver_wext_set_auth_param(drv,
IW_AUTH_WPA_VERSION, value) < 0)
ret = -1;
value = wpa_driver_wext_cipher2wext(params->pairwise_suite);
if (wpa_driver_wext_set_auth_param(drv,
IW_AUTH_CIPHER_PAIRWISE, value) < 0)
ret = -1;
value = wpa_driver_wext_cipher2wext(params->group_suite);
if (wpa_driver_wext_set_auth_param(drv,
IW_AUTH_CIPHER_GROUP, value) < 0)
ret = -1;
value = wpa_driver_wext_keymgmt2wext(params->key_mgmt_suite);
if (wpa_driver_wext_set_auth_param(drv,
IW_AUTH_KEY_MGMT, value) < 0)
ret = -1;
value = params->key_mgmt_suite != WPA_KEY_MGMT_NONE ||
params->pairwise_suite != WPA_CIPHER_NONE ||
params->group_suite != WPA_CIPHER_NONE ||
params->wpa_ie_len;
if (wpa_driver_wext_set_auth_param(drv,
IW_AUTH_PRIVACY_INVOKED, value) < 0)
ret = -1;
/* Allow unencrypted EAPOL messages even if pairwise keys are set when
* not using WPA. IEEE 802.1X specifies that these frames are not
* encrypted, but WPA encrypts them when pairwise keys are in use. */
if (params->key_mgmt_suite == WPA_KEY_MGMT_IEEE8021X ||
params->key_mgmt_suite == WPA_KEY_MGMT_PSK)
allow_unencrypted_eapol = 0;
else
allow_unencrypted_eapol = 1;
if (wpa_driver_wext_set_psk(drv, params->psk) < 0)
ret = -1;
if (wpa_driver_wext_set_auth_param(drv,
IW_AUTH_RX_UNENCRYPTED_EAPOL,
allow_unencrypted_eapol) < 0)
ret = -1;
#ifdef CONFIG_IEEE80211W
switch (params->mgmt_frame_protection) {
case NO_MGMT_FRAME_PROTECTION:
value = IW_AUTH_MFP_DISABLED;
break;
case MGMT_FRAME_PROTECTION_OPTIONAL:
value = IW_AUTH_MFP_OPTIONAL;
break;
case MGMT_FRAME_PROTECTION_REQUIRED:
value = IW_AUTH_MFP_REQUIRED;
break;
};
if (wpa_driver_wext_set_auth_param(drv, IW_AUTH_MFP, value) < 0)
ret = -1;
#endif /* CONFIG_IEEE80211W */
if (params->freq.freq &&
wpa_driver_wext_set_freq(drv, params->freq.freq) < 0)
ret = -1;
if (!drv->cfg80211 &&
wpa_driver_wext_set_ssid(drv, params->ssid, params->ssid_len) < 0)
ret = -1;
if (params->bssid &&
wpa_driver_wext_set_bssid(drv, params->bssid) < 0)
ret = -1;
if (drv->cfg80211 &&
wpa_driver_wext_set_ssid(drv, params->ssid, params->ssid_len) < 0)
ret = -1;
return ret;
}
static int wpa_driver_wext_set_auth_alg(void *priv, int auth_alg)
{
struct wpa_driver_wext_data *drv = priv;
int algs = 0, res;
if (auth_alg & WPA_AUTH_ALG_OPEN)
algs |= IW_AUTH_ALG_OPEN_SYSTEM;
if (auth_alg & WPA_AUTH_ALG_SHARED)
algs |= IW_AUTH_ALG_SHARED_KEY;
if (auth_alg & WPA_AUTH_ALG_LEAP)
algs |= IW_AUTH_ALG_LEAP;
if (algs == 0) {
/* at least one algorithm should be set */
algs = IW_AUTH_ALG_OPEN_SYSTEM;
}
res = wpa_driver_wext_set_auth_param(drv, IW_AUTH_80211_AUTH_ALG,
algs);
drv->auth_alg_fallback = res == -2;
return res;
}
/**
* wpa_driver_wext_set_mode - Set wireless mode (infra/adhoc), SIOCSIWMODE
* @priv: Pointer to private wext data from wpa_driver_wext_init()
* @mode: 0 = infra/BSS (associate with an AP), 1 = adhoc/IBSS
* Returns: 0 on success, -1 on failure
*/
int wpa_driver_wext_set_mode(void *priv, int mode)
{
struct wpa_driver_wext_data *drv = priv;
struct iwreq iwr;
int ret = -1;
unsigned int new_mode = mode ? IW_MODE_ADHOC : IW_MODE_INFRA;
os_memset(&iwr, 0, sizeof(iwr));
os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
iwr.u.mode = new_mode;
if (ioctl(drv->ioctl_sock, SIOCSIWMODE, &iwr) == 0) {
ret = 0;
goto done;
}
if (errno != EBUSY) {
perror("ioctl[SIOCSIWMODE]");
goto done;
}
/* mac80211 doesn't allow mode changes while the device is up, so if
* the device isn't in the mode we're about to change to, take device
* down, try to set the mode again, and bring it back up.
*/
if (ioctl(drv->ioctl_sock, SIOCGIWMODE, &iwr) < 0) {
perror("ioctl[SIOCGIWMODE]");
goto done;
}
if (iwr.u.mode == new_mode) {
ret = 0;
goto done;
}
if (linux_set_iface_flags(drv->ioctl_sock, drv->ifname, 0) == 0) {
/* Try to set the mode again while the interface is down */
iwr.u.mode = new_mode;
if (ioctl(drv->ioctl_sock, SIOCSIWMODE, &iwr) < 0)
perror("ioctl[SIOCSIWMODE]");
else
ret = 0;
(void) linux_set_iface_flags(drv->ioctl_sock, drv->ifname, 1);
}
done:
return ret;
}
static int wpa_driver_wext_pmksa(struct wpa_driver_wext_data *drv,
u32 cmd, const u8 *bssid, const u8 *pmkid)
{
struct iwreq iwr;
struct iw_pmksa pmksa;
int ret = 0;
os_memset(&iwr, 0, sizeof(iwr));
os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
os_memset(&pmksa, 0, sizeof(pmksa));
pmksa.cmd = cmd;
pmksa.bssid.sa_family = ARPHRD_ETHER;
if (bssid)
os_memcpy(pmksa.bssid.sa_data, bssid, ETH_ALEN);
if (pmkid)
os_memcpy(pmksa.pmkid, pmkid, IW_PMKID_LEN);
iwr.u.data.pointer = (caddr_t) &pmksa;
iwr.u.data.length = sizeof(pmksa);
if (ioctl(drv->ioctl_sock, SIOCSIWPMKSA, &iwr) < 0) {
if (errno != EOPNOTSUPP)
perror("ioctl[SIOCSIWPMKSA]");
ret = -1;
}
return ret;
}
static int wpa_driver_wext_add_pmkid(void *priv, const u8 *bssid,
const u8 *pmkid)
{
struct wpa_driver_wext_data *drv = priv;
return wpa_driver_wext_pmksa(drv, IW_PMKSA_ADD, bssid, pmkid);
}
static int wpa_driver_wext_remove_pmkid(void *priv, const u8 *bssid,
const u8 *pmkid)
{
struct wpa_driver_wext_data *drv = priv;
return wpa_driver_wext_pmksa(drv, IW_PMKSA_REMOVE, bssid, pmkid);
}
static int wpa_driver_wext_flush_pmkid(void *priv)
{
struct wpa_driver_wext_data *drv = priv;
return wpa_driver_wext_pmksa(drv, IW_PMKSA_FLUSH, NULL, NULL);
}
int wpa_driver_wext_get_capa(void *priv, struct wpa_driver_capa *capa)
{
struct wpa_driver_wext_data *drv = priv;
if (!drv->has_capability)
return -1;
os_memcpy(capa, &drv->capa, sizeof(*capa));
return 0;
}
int wpa_driver_wext_alternative_ifindex(struct wpa_driver_wext_data *drv,
const char *ifname)
{
if (ifname == NULL) {
drv->ifindex2 = -1;
return 0;
}
drv->ifindex2 = if_nametoindex(ifname);
if (drv->ifindex2 <= 0)
return -1;
wpa_printf(MSG_DEBUG, "Added alternative ifindex %d (%s) for "
"wireless events", drv->ifindex2, ifname);
return 0;
}
int wpa_driver_wext_set_operstate(void *priv, int state)
{
struct wpa_driver_wext_data *drv = priv;
wpa_printf(MSG_DEBUG, "%s: operstate %d->%d (%s)",
__func__, drv->operstate, state, state ? "UP" : "DORMANT");
drv->operstate = state;
return netlink_send_oper_ifla(drv->netlink, drv->ifindex, -1,
state ? IF_OPER_UP : IF_OPER_DORMANT);
}
int wpa_driver_wext_get_version(struct wpa_driver_wext_data *drv)
{
return drv->we_version_compiled;
}
static const char * wext_get_radio_name(void *priv)
{
struct wpa_driver_wext_data *drv = priv;
return drv->phyname;
}
static int wpa_driver_wext_signal_poll(void *priv, struct wpa_signal_info *si)
{
struct wpa_driver_wext_data *drv = priv;
struct iw_statistics stats;
struct iwreq iwr;
os_memset(si, 0, sizeof(*si));
si->current_signal = -9999;
si->current_noise = 9999;
si->chanwidth = CHAN_WIDTH_UNKNOWN;
os_memset(&iwr, 0, sizeof(iwr));
os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
iwr.u.data.pointer = (caddr_t) &stats;
iwr.u.data.length = sizeof(stats);
iwr.u.data.flags = 1;
if (ioctl(drv->ioctl_sock, SIOCGIWSTATS, &iwr) < 0) {
wpa_printf(MSG_ERROR, "WEXT: SIOCGIWSTATS: %s",
strerror(errno));
return -1;
}
si->current_signal = stats.qual.level -
((stats.qual.updated & IW_QUAL_DBM) ? 0x100 : 0);
si->current_noise = stats.qual.noise -
((stats.qual.updated & IW_QUAL_DBM) ? 0x100 : 0);
return 0;
}
static int wpa_driver_wext_status(void *priv, char *buf, size_t buflen)
{
struct wpa_driver_wext_data *drv = priv;
int res;
char *pos, *end;
unsigned char addr[ETH_ALEN];
pos = buf;
end = buf + buflen;
if (linux_get_ifhwaddr(drv->ioctl_sock, drv->ifname, addr))
return -1;
res = os_snprintf(pos, end - pos,
"ifindex=%d\n"
"ifname=%s\n"
"addr=" MACSTR "\n",
drv->ifindex,
drv->ifname,
MAC2STR(addr));
if (res < 0 || res >= end - pos)
return pos - buf;
pos += res;
return pos - buf;
}
const struct wpa_driver_ops wpa_driver_wext_ops = {
.name = "wext",
.desc = "Linux wireless extensions (generic)",
.get_bssid = wpa_driver_wext_get_bssid,
.get_ssid = wpa_driver_wext_get_ssid,
.set_key = wpa_driver_wext_set_key,
.set_countermeasures = wpa_driver_wext_set_countermeasures,
.scan2 = wpa_driver_wext_scan,
.get_scan_results2 = wpa_driver_wext_get_scan_results,
.deauthenticate = wpa_driver_wext_deauthenticate,
.associate = wpa_driver_wext_associate,
.init = wpa_driver_wext_init,
.deinit = wpa_driver_wext_deinit,
.add_pmkid = wpa_driver_wext_add_pmkid,
.remove_pmkid = wpa_driver_wext_remove_pmkid,
.flush_pmkid = wpa_driver_wext_flush_pmkid,
.get_capa = wpa_driver_wext_get_capa,
.set_operstate = wpa_driver_wext_set_operstate,
.get_radio_name = wext_get_radio_name,
.signal_poll = wpa_driver_wext_signal_poll,
.status = wpa_driver_wext_status,
};
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