// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (C) 2005 - 2018 Red Hat, Inc.
* Copyright (C) 2006 - 2008 Novell, Inc.
*/
#include "nm-default.h"
#include "nm-wifi-utils-wext.h"
#include <sys/ioctl.h>
#include <net/ethernet.h>
#include <unistd.h>
/* Hacks necessary to #include wireless.h; yay for WEXT */
#ifndef __user
#define __user
#endif
#include <sys/types.h>
#include <linux/types.h>
#include <sys/socket.h>
#include <linux/wireless.h>
#include "nm-wifi-utils-private.h"
#include "nm-utils.h"
#include "platform/nm-platform-utils.h"
#include "nm-core-internal.h"
typedef struct {
NMWifiUtils parent;
int fd;
struct iw_quality max_qual;
gint8 num_freqs;
guint32 freqs[IW_MAX_FREQUENCIES];
} NMWifiUtilsWext;
typedef struct {
NMWifiUtilsClass parent;
} NMWifiUtilsWextClass;
G_DEFINE_TYPE (NMWifiUtilsWext, nm_wifi_utils_wext, NM_TYPE_WIFI_UTILS)
/* Until a new wireless-tools comes out that has the defs and the structure,
* need to copy them here.
*/
/* Scan capability flags - in (struct iw_range *)->scan_capa */
#define NM_IW_SCAN_CAPA_NONE 0x00
#define NM_IW_SCAN_CAPA_ESSID 0x01
struct iw_range_with_scan_capa
{
guint32 throughput;
guint32 min_nwid;
guint32 max_nwid;
guint16 old_num_channels;
guint8 old_num_frequency;
guint8 scan_capa;
/* don't need the rest... */
};
#define _NMLOG_PREFIX_NAME "wifi-wext"
#define _NMLOG(level, domain, ...) \
G_STMT_START { \
nm_log ((level), (domain), NULL, NULL, \
"%s: " _NM_UTILS_MACRO_FIRST(__VA_ARGS__), \
_NMLOG_PREFIX_NAME \
_NM_UTILS_MACRO_REST(__VA_ARGS__)); \
} G_STMT_END
static guint32
iw_freq_to_uint32 (const struct iw_freq *freq)
{
if (freq->e == 0) {
/* Some drivers report channel not frequency. Convert to a
* frequency; but this assumes that the device is in b/g mode.
*/
if ((freq->m >= 1) && (freq->m <= 13))
return 2407 + (5 * freq->m);
else if (freq->m == 14)
return 2484;
}
return (guint32) ((((double) freq->m) * nm_utils_exp10 (freq->e)) / 1000000.0);
}
static void
dispose (GObject *object)
{
NMWifiUtilsWext *wext = NM_WIFI_UTILS_WEXT (object);
wext->fd = nm_close (wext->fd);
}
static gboolean
get_ifname (int ifindex, char *buffer, const char *op)
{
int errsv;
if (!nmp_utils_if_indextoname (ifindex, buffer)) {
errsv = errno;
_LOGW (LOGD_PLATFORM | LOGD_WIFI,
"error getting interface name for ifindex %d, operation '%s': %s (%d)",
ifindex, op, nm_strerror_native (errsv), errsv);
return FALSE;
}
return TRUE;
}
static NM80211Mode
wifi_wext_get_mode_ifname (NMWifiUtils *data, const char *ifname)
{
NMWifiUtilsWext *wext = (NMWifiUtilsWext *) data;
struct iwreq wrq;
int errsv;
memset (&wrq, 0, sizeof (struct iwreq));
nm_utils_ifname_cpy (wrq.ifr_name, ifname);
if (ioctl (wext->fd, SIOCGIWMODE, &wrq) < 0) {
errsv = errno;
if (errsv != ENODEV) {
_LOGW (LOGD_PLATFORM | LOGD_WIFI,
"(%s): error %d getting card mode",
ifname, errsv);
}
return NM_802_11_MODE_UNKNOWN;
}
switch (wrq.u.mode) {
case IW_MODE_ADHOC:
return NM_802_11_MODE_ADHOC;
case IW_MODE_MASTER:
return NM_802_11_MODE_AP;
case IW_MODE_INFRA:
case IW_MODE_AUTO: /* hack for WEXT devices reporting IW_MODE_AUTO */
return NM_802_11_MODE_INFRA;
default:
break;
}
return NM_802_11_MODE_UNKNOWN;
}
static NM80211Mode
wifi_wext_get_mode (NMWifiUtils *data)
{
char ifname[IFNAMSIZ];
if (!get_ifname (data->ifindex, ifname, "get-mode"))
return FALSE;
return wifi_wext_get_mode_ifname (data, ifname);
}
static gboolean
wifi_wext_set_mode (NMWifiUtils *data, const NM80211Mode mode)
{
NMWifiUtilsWext *wext = (NMWifiUtilsWext *) data;
struct iwreq wrq;
char ifname[IFNAMSIZ];
if (!get_ifname (data->ifindex, ifname, "set-mode"))
return FALSE;
if (wifi_wext_get_mode_ifname (data, ifname) == mode)
return TRUE;
memset (&wrq, 0, sizeof (struct iwreq));
switch (mode) {
case NM_802_11_MODE_ADHOC:
wrq.u.mode = IW_MODE_ADHOC;
break;
case NM_802_11_MODE_AP:
wrq.u.mode = IW_MODE_MASTER;
break;
case NM_802_11_MODE_INFRA:
wrq.u.mode = IW_MODE_INFRA;
break;
default:
g_warn_if_reached ();
return FALSE;
}
nm_utils_ifname_cpy (wrq.ifr_name, ifname);
if (ioctl (wext->fd, SIOCSIWMODE, &wrq) < 0) {
if (errno != ENODEV) {
_LOGE (LOGD_PLATFORM | LOGD_WIFI,
"(%s): error setting mode %d",
ifname, mode);
}
return FALSE;
}
return TRUE;
}
static gboolean
wifi_wext_set_powersave (NMWifiUtils *data, guint32 powersave)
{
NMWifiUtilsWext *wext = (NMWifiUtilsWext *) data;
struct iwreq wrq;
char ifname[IFNAMSIZ];
if (!get_ifname (data->ifindex, ifname, "set-powersave"))
return FALSE;
memset (&wrq, 0, sizeof (struct iwreq));
if (powersave == 1) {
wrq.u.power.flags = IW_POWER_ALL_R;
} else
wrq.u.power.disabled = 1;
nm_utils_ifname_cpy (wrq.ifr_name, ifname);
if (ioctl (wext->fd, SIOCSIWPOWER, &wrq) < 0) {
if (errno != ENODEV) {
_LOGE (LOGD_PLATFORM | LOGD_WIFI,
"(%s): error setting powersave %" G_GUINT32_FORMAT,
ifname, powersave);
}
return FALSE;
}
return TRUE;
}
static guint32
wifi_wext_get_freq (NMWifiUtils *data)
{
NMWifiUtilsWext *wext = (NMWifiUtilsWext *) data;
struct iwreq wrq;
char ifname[IFNAMSIZ];
if (!get_ifname (data->ifindex, ifname, "get-freq"))
return FALSE;
memset (&wrq, 0, sizeof (struct iwreq));
nm_utils_ifname_cpy (wrq.ifr_name, ifname);
if (ioctl (wext->fd, SIOCGIWFREQ, &wrq) < 0) {
_LOGW (LOGD_PLATFORM | LOGD_WIFI,
"(%s): error getting frequency: %s",
ifname, nm_strerror_native (errno));
return 0;
}
return iw_freq_to_uint32 (&wrq.u.freq);
}
static guint32
wifi_wext_find_freq (NMWifiUtils *data, const guint32 *freqs)
{
NMWifiUtilsWext *wext = (NMWifiUtilsWext *) data;
int i;
for (i = 0; i < wext->num_freqs; i++) {
while (*freqs) {
if (wext->freqs[i] == *freqs)
return *freqs;
freqs++;
}
}
return 0;
}
static gboolean
wifi_wext_get_bssid (NMWifiUtils *data, guint8 *out_bssid)
{
NMWifiUtilsWext *wext = (NMWifiUtilsWext *) data;
struct iwreq wrq;
char ifname[IFNAMSIZ];
if (!get_ifname (data->ifindex, ifname, "get-bssid"))
return FALSE;
memset (&wrq, 0, sizeof (wrq));
nm_utils_ifname_cpy (wrq.ifr_name, ifname);
if (ioctl (wext->fd, SIOCGIWAP, &wrq) < 0) {
_LOGW (LOGD_PLATFORM | LOGD_WIFI,
"(%s): error getting associated BSSID: %s",
ifname, nm_strerror_native (errno));
return FALSE;
}
memcpy (out_bssid, &(wrq.u.ap_addr.sa_data), ETH_ALEN);
return TRUE;
}
static guint32
wifi_wext_get_rate (NMWifiUtils *data)
{
NMWifiUtilsWext *wext = (NMWifiUtilsWext *) data;
struct iwreq wrq;
int err;
char ifname[IFNAMSIZ];
if (!get_ifname (data->ifindex, ifname, "get-rate"))
return FALSE;
memset (&wrq, 0, sizeof (wrq));
nm_utils_ifname_cpy (wrq.ifr_name, ifname);
err = ioctl (wext->fd, SIOCGIWRATE, &wrq);
return ((err == 0) ? wrq.u.bitrate.value / 1000 : 0);
}
static int
wext_qual_to_percent (const struct iw_quality *qual,
const struct iw_quality *max_qual)
{
int percent = -1;
int level_percent = -1;
g_return_val_if_fail (qual != NULL, -1);
g_return_val_if_fail (max_qual != NULL, -1);
/* Magically convert the many different WEXT quality representations to a percentage */
_LOGD (LOGD_WIFI,
"QL: qual %d/%u/0x%X, level %d/%u/0x%X, noise %d/%u/0x%X, updated: 0x%X ** MAX: qual %d/%u/0x%X, level %d/%u/0x%X, noise %d/%u/0x%X, updated: 0x%X",
(__s8) qual->qual, qual->qual, qual->qual,
(__s8) qual->level, qual->level, qual->level,
(__s8) qual->noise, qual->noise, qual->noise,
qual->updated,
(__s8) max_qual->qual, max_qual->qual, max_qual->qual,
(__s8) max_qual->level, max_qual->level, max_qual->level,
(__s8) max_qual->noise, max_qual->noise, max_qual->noise,
max_qual->updated);
/* Try using the card's idea of the signal quality first as long as it tells us what the max quality is.
* Drivers that fill in quality values MUST treat them as percentages, ie the "Link Quality" MUST be
* bounded by 0 and max_qual->qual, and MUST change in a linear fashion. Within those bounds, drivers
* are free to use whatever they want to calculate "Link Quality".
*/
if ((max_qual->qual != 0) && !(max_qual->updated & IW_QUAL_QUAL_INVALID) && !(qual->updated & IW_QUAL_QUAL_INVALID))
percent = (int)(100 * ((double)qual->qual / (double)max_qual->qual));
/* If the driver doesn't specify a complete and valid quality, we have two options:
*
* 1) dBm: driver must specify max_qual->level = 0, and have valid values for
* qual->level and (qual->noise OR max_qual->noise)
* 2) raw RSSI: driver must specify max_qual->level > 0, and have valid values for
* qual->level and max_qual->level
*
* This is the WEXT spec. If this interpretation is wrong, I'll fix it. Otherwise,
* If drivers don't conform to it, they are wrong and need to be fixed.
*/
if ( (max_qual->level == 0) && !(max_qual->updated & IW_QUAL_LEVEL_INVALID) /* Valid max_qual->level == 0 */
&& !(qual->updated & IW_QUAL_LEVEL_INVALID) /* Must have valid qual->level */
&& ( ((max_qual->noise > 0) && !(max_qual->updated & IW_QUAL_NOISE_INVALID)) /* Must have valid max_qual->noise */
|| ((qual->noise > 0) && !(qual->updated & IW_QUAL_NOISE_INVALID))) /* OR valid qual->noise */
) {
/* Absolute power values (dBm) */
/* Reasonable fallbacks for dumb drivers that don't specify either level. */
#define FALLBACK_NOISE_FLOOR_DBM -90
#define FALLBACK_SIGNAL_MAX_DBM -20
int max_level = FALLBACK_SIGNAL_MAX_DBM;
int noise = FALLBACK_NOISE_FLOOR_DBM;
int level = qual->level - 0x100;
level = CLAMP (level, FALLBACK_NOISE_FLOOR_DBM, FALLBACK_SIGNAL_MAX_DBM);
if ((qual->noise > 0) && !(qual->updated & IW_QUAL_NOISE_INVALID))
noise = qual->noise - 0x100;
else if ((max_qual->noise > 0) && !(max_qual->updated & IW_QUAL_NOISE_INVALID))
noise = max_qual->noise - 0x100;
noise = CLAMP (noise, FALLBACK_NOISE_FLOOR_DBM, FALLBACK_SIGNAL_MAX_DBM - 1);
/* A sort of signal-to-noise ratio calculation */
level_percent = (int) (100 - 70 * (((double)max_level - (double)level) /
((double)max_level - (double)noise)));
_LOGD (LOGD_WIFI, "QL1: level_percent is %d. max_level %d, level %d, noise_floor %d.",
level_percent, max_level, level, noise);
} else if ( (max_qual->level != 0)
&& !(max_qual->updated & IW_QUAL_LEVEL_INVALID) /* Valid max_qual->level as upper bound */
&& !(qual->updated & IW_QUAL_LEVEL_INVALID)) {
/* Relative power values (RSSI) */
int level = qual->level;
/* Signal level is relavtive (0 -> max_qual->level) */
level = CLAMP (level, 0, max_qual->level);
level_percent = (int)(100 * ((double)level / (double)max_qual->level));
_LOGD (LOGD_WIFI, "QL2: level_percent is %d. max_level %d, level %d.",
level_percent, max_qual->level, level);
} else if (percent == -1) {
_LOGD (LOGD_WIFI, "QL: Could not get quality %% value from driver. Driver is probably buggy.");
}
/* If the quality percent was 0 or doesn't exist, then try to use signal levels instead */
if ((percent < 1) && (level_percent >= 0))
percent = level_percent;
_LOGD (LOGD_WIFI, "QL: Final quality percent is %d (%d).",
percent, CLAMP (percent, 0, 100));
return (CLAMP (percent, 0, 100));
}
static int
wifi_wext_get_qual (NMWifiUtils *data)
{
NMWifiUtilsWext *wext = (NMWifiUtilsWext *) data;
struct iwreq wrq;
struct iw_statistics stats;
char ifname[IFNAMSIZ];
if (!get_ifname (data->ifindex, ifname, "get-qual"))
return FALSE;
memset (&stats, 0, sizeof (stats));
wrq.u.data.pointer = &stats;
wrq.u.data.length = sizeof (stats);
wrq.u.data.flags = 1; /* Clear updated flag */
nm_utils_ifname_cpy (wrq.ifr_name, ifname);
if (ioctl (wext->fd, SIOCGIWSTATS, &wrq) < 0) {
_LOGW (LOGD_PLATFORM | LOGD_WIFI,
"(%s): error getting signal strength: %s",
ifname, nm_strerror_native (errno));
return -1;
}
return wext_qual_to_percent (&stats.qual, &wext->max_qual);
}
/*****************************************************************************/
/* OLPC Mesh-only functions */
static guint32
wifi_wext_get_mesh_channel (NMWifiUtils *data)
{
NMWifiUtilsWext *wext = (NMWifiUtilsWext *) data;
guint32 freq;
int i;
freq = nm_wifi_utils_get_freq (data);
for (i = 0; i < wext->num_freqs; i++) {
if (freq == wext->freqs[i])
return i + 1;
}
return 0;
}
static gboolean
wifi_wext_set_mesh_channel (NMWifiUtils *data, guint32 channel)
{
NMWifiUtilsWext *wext = (NMWifiUtilsWext *) data;
struct iwreq wrq;
char ifname[IFNAMSIZ];
if (!get_ifname (data->ifindex, ifname, "set-mesh-channel"))
return FALSE;
memset (&wrq, 0, sizeof (struct iwreq));
nm_utils_ifname_cpy (wrq.ifr_name, ifname);
if (channel > 0) {
wrq.u.freq.flags = IW_FREQ_FIXED;
wrq.u.freq.e = 0;
wrq.u.freq.m = channel;
}
if (ioctl (wext->fd, SIOCSIWFREQ, &wrq) < 0) {
_LOGE (LOGD_PLATFORM | LOGD_WIFI | LOGD_OLPC,
"(%s): error setting channel to %d: %s",
ifname, channel, nm_strerror_native (errno));
return FALSE;
}
return TRUE;
}
static gboolean
wifi_wext_set_mesh_ssid (NMWifiUtils *data, const guint8 *ssid, gsize len)
{
NMWifiUtilsWext *wext = (NMWifiUtilsWext *) data;
struct iwreq wrq;
char buf[IW_ESSID_MAX_SIZE + 1];
char ifname[IFNAMSIZ];
int errsv;
if (!get_ifname (data->ifindex, ifname, "set-mesh-ssid"))
return FALSE;
memset (buf, 0, sizeof (buf));
memcpy (buf, ssid, MIN (sizeof (buf) - 1, len));
wrq.u.essid.pointer = (caddr_t) buf;
wrq.u.essid.length = len;
wrq.u.essid.flags = (len > 0) ? 1 : 0; /* 1=enable SSID, 0=disable/any */
nm_utils_ifname_cpy (wrq.ifr_name, ifname);
if (ioctl (wext->fd, SIOCSIWESSID, &wrq) == 0)
return TRUE;
errsv = errno;
if (errsv != ENODEV) {
gs_free char *ssid_str = NULL;
_LOGE (LOGD_PLATFORM | LOGD_WIFI | LOGD_OLPC,
"(%s): error setting SSID to %s: %s",
ifname,
(ssid_str = _nm_utils_ssid_to_string_arr (ssid, len)),
nm_strerror_native (errsv));
}
return FALSE;
}
/*****************************************************************************/
static gboolean
wext_can_scan_ifname (NMWifiUtilsWext *wext, const char *ifname)
{
struct iwreq wrq;
memset (&wrq, 0, sizeof (struct iwreq));
nm_utils_ifname_cpy (wrq.ifr_name, ifname);
if (ioctl (wext->fd, SIOCSIWSCAN, &wrq) < 0) {
if (errno == EOPNOTSUPP)
return FALSE;
}
return TRUE;
}
static gboolean
wext_get_range_ifname (NMWifiUtilsWext *wext,
const char *ifname,
struct iw_range *range,
guint32 *response_len)
{
int i = 26;
gboolean success = FALSE;
struct iwreq wrq;
int errsv;
memset (&wrq, 0, sizeof (struct iwreq));
nm_utils_ifname_cpy (wrq.ifr_name, ifname);
wrq.u.data.pointer = (caddr_t) range;
wrq.u.data.length = sizeof (struct iw_range);
/* Need to give some drivers time to recover after suspend/resume
* (ex ipw3945 takes a few seconds to talk to its regulatory daemon;
* see rh bz#362421)
*/
while (i-- > 0) {
if (ioctl (wext->fd, SIOCGIWRANGE, &wrq) == 0) {
if (response_len)
*response_len = wrq.u.data.length;
success = TRUE;
break;
} else {
errsv = errno;
if (errsv != EAGAIN) {
_LOGE (LOGD_PLATFORM | LOGD_WIFI,
"(%s): couldn't get driver range information (%d).",
ifname, errsv);
break;
}
}
g_usleep (G_USEC_PER_SEC / 4);
}
if (i <= 0) {
_LOGW (LOGD_PLATFORM | LOGD_WIFI,
"(%s): driver took too long to respond to IWRANGE query.",
ifname);
}
return success;
}
#define WPA_CAPS (NM_WIFI_DEVICE_CAP_CIPHER_TKIP | \
NM_WIFI_DEVICE_CAP_CIPHER_CCMP | \
NM_WIFI_DEVICE_CAP_WPA | \
NM_WIFI_DEVICE_CAP_RSN)
static guint32
wext_get_caps (NMWifiUtilsWext *wext, const char *ifname, struct iw_range *range)
{
guint32 caps = NM_WIFI_DEVICE_CAP_NONE;
g_return_val_if_fail (wext != NULL, NM_WIFI_DEVICE_CAP_NONE);
g_return_val_if_fail (range != NULL, NM_WIFI_DEVICE_CAP_NONE);
/* All drivers should support WEP by default */
caps |= NM_WIFI_DEVICE_CAP_CIPHER_WEP40 | NM_WIFI_DEVICE_CAP_CIPHER_WEP104;
if (range->enc_capa & IW_ENC_CAPA_CIPHER_TKIP)
caps |= NM_WIFI_DEVICE_CAP_CIPHER_TKIP;
if (range->enc_capa & IW_ENC_CAPA_CIPHER_CCMP)
caps |= NM_WIFI_DEVICE_CAP_CIPHER_CCMP;
if (range->enc_capa & IW_ENC_CAPA_WPA)
caps |= NM_WIFI_DEVICE_CAP_WPA;
if (range->enc_capa & IW_ENC_CAPA_WPA2)
caps |= NM_WIFI_DEVICE_CAP_RSN;
/* Check for cipher support but not WPA support */
if ( (caps & (NM_WIFI_DEVICE_CAP_CIPHER_TKIP | NM_WIFI_DEVICE_CAP_CIPHER_CCMP))
&& !(caps & (NM_WIFI_DEVICE_CAP_WPA | NM_WIFI_DEVICE_CAP_RSN))) {
_LOGW (LOGD_WIFI,
"%s: device supports WPA ciphers but not WPA protocol; WPA unavailable.",
ifname);
caps &= ~WPA_CAPS;
}
/* Check for WPA support but not cipher support */
if ( (caps & (NM_WIFI_DEVICE_CAP_WPA | NM_WIFI_DEVICE_CAP_RSN))
&& !(caps & (NM_WIFI_DEVICE_CAP_CIPHER_TKIP | NM_WIFI_DEVICE_CAP_CIPHER_CCMP))) {
_LOGW (LOGD_WIFI,
"%s: device supports WPA protocol but not WPA ciphers; WPA unavailable.",
ifname);
caps &= ~WPA_CAPS;
}
/* There's no way to detect Ad-Hoc/AP mode support with WEXT
* (other than actually trying to do it), so just assume that
* Ad-Hoc is supported and AP isn't.
*/
caps |= NM_WIFI_DEVICE_CAP_ADHOC;
return caps;
}
/*****************************************************************************/
static void
nm_wifi_utils_wext_init (NMWifiUtilsWext *self)
{
}
static void
nm_wifi_utils_wext_class_init (NMWifiUtilsWextClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
NMWifiUtilsClass *wifi_utils_class = NM_WIFI_UTILS_CLASS (klass);
object_class->dispose = dispose;
wifi_utils_class->get_mode = wifi_wext_get_mode;
wifi_utils_class->set_mode = wifi_wext_set_mode;
wifi_utils_class->set_powersave = wifi_wext_set_powersave;
wifi_utils_class->get_freq = wifi_wext_get_freq;
wifi_utils_class->find_freq = wifi_wext_find_freq;
wifi_utils_class->get_bssid = wifi_wext_get_bssid;
wifi_utils_class->get_rate = wifi_wext_get_rate;
wifi_utils_class->get_qual = wifi_wext_get_qual;
wifi_utils_class->get_mesh_channel = wifi_wext_get_mesh_channel;
wifi_utils_class->set_mesh_channel = wifi_wext_set_mesh_channel;
wifi_utils_class->set_mesh_ssid = wifi_wext_set_mesh_ssid;
}
NMWifiUtils *
nm_wifi_utils_wext_new (int ifindex, gboolean check_scan)
{
NMWifiUtilsWext *wext;
struct iw_range range;
guint32 response_len = 0;
struct iw_range_with_scan_capa *scan_capa_range;
int i;
gboolean freq_valid = FALSE, has_5ghz = FALSE, has_2ghz = FALSE;
char ifname[IFNAMSIZ];
if (!nmp_utils_if_indextoname (ifindex, ifname)) {
_LOGW (LOGD_PLATFORM | LOGD_WIFI,
"can't determine interface name for ifindex %d", ifindex);
return NULL;
}
wext = g_object_new (NM_TYPE_WIFI_UTILS_WEXT, NULL);
wext->parent.ifindex = ifindex;
wext->fd = socket (PF_INET, SOCK_DGRAM | SOCK_CLOEXEC, 0);
if (wext->fd < 0)
goto error;
memset (&range, 0, sizeof (struct iw_range));
if (wext_get_range_ifname (wext, ifname, &range, &response_len) == FALSE) {
_LOGI (LOGD_PLATFORM | LOGD_WIFI, "(%s): driver WEXT range request failed",
ifname);
goto error;
}
if ((response_len < 300) || (range.we_version_compiled < 21)) {
_LOGI (LOGD_PLATFORM | LOGD_WIFI,
"(%s): driver WEXT version too old (got %d, expected >= 21)",
ifname,
range.we_version_compiled);
goto error;
}
wext->max_qual.qual = range.max_qual.qual;
wext->max_qual.level = range.max_qual.level;
wext->max_qual.noise = range.max_qual.noise;
wext->max_qual.updated = range.max_qual.updated;
wext->num_freqs = MIN (range.num_frequency, IW_MAX_FREQUENCIES);
for (i = 0; i < wext->num_freqs; i++) {
wext->freqs[i] = iw_freq_to_uint32 (&range.freq[i]);
freq_valid = TRUE;
if (wext->freqs[i] > 2400 && wext->freqs[i] < 2500)
has_2ghz = TRUE;
else if (wext->freqs[i] > 4900 && wext->freqs[i] < 6000)
has_5ghz = TRUE;
}
/* Check for scanning capability; cards that can't scan are not supported */
if (check_scan && (wext_can_scan_ifname (wext, ifname) == FALSE)) {
_LOGI (LOGD_PLATFORM | LOGD_WIFI,
"(%s): drivers that cannot scan are unsupported",
ifname);
goto error;
}
/* Check for the ability to scan specific SSIDs. Until the scan_capa
* field gets added to wireless-tools, need to work around that by casting
* to the custom structure.
*/
scan_capa_range = (struct iw_range_with_scan_capa *) ⦥
if (scan_capa_range->scan_capa & NM_IW_SCAN_CAPA_ESSID) {
_LOGI (LOGD_PLATFORM | LOGD_WIFI,
"(%s): driver supports SSID scans (scan_capa 0x%02X).",
ifname,
scan_capa_range->scan_capa);
} else {
_LOGI (LOGD_PLATFORM | LOGD_WIFI,
"(%s): driver does not support SSID scans (scan_capa 0x%02X).",
ifname,
scan_capa_range->scan_capa);
}
wext->parent.caps = wext_get_caps (wext, ifname, &range);
if (freq_valid)
wext->parent.caps |= NM_WIFI_DEVICE_CAP_FREQ_VALID;
if (has_2ghz)
wext->parent.caps |= NM_WIFI_DEVICE_CAP_FREQ_2GHZ;
if (has_5ghz)
wext->parent.caps |= NM_WIFI_DEVICE_CAP_FREQ_5GHZ;
_LOGI (LOGD_PLATFORM | LOGD_WIFI,
"(%s): using WEXT for Wi-Fi device control",
ifname);
return (NMWifiUtils *) wext;
error:
g_object_unref (wext);
return NULL;
}
gboolean
nm_wifi_utils_wext_is_wifi (const char *iface)
{
int fd;
struct iwreq iwr;
gboolean is_wifi = FALSE;
/* performing an ioctl on a non-existing name may cause the automatic
* loading of kernel modules, which should be avoided.
*
* Usually, we should thus make sure that an interface with this name
* exists.
*
* Note that wifi_wext_is_wifi() has only one caller which just verified
* that an interface with this name exists.
*/
fd = socket (PF_INET, SOCK_DGRAM | SOCK_CLOEXEC, 0);
if (fd >= 0) {
nm_utils_ifname_cpy (iwr.ifr_ifrn.ifrn_name, iface);
if (ioctl (fd, SIOCGIWNAME, &iwr) == 0)
is_wifi = TRUE;
nm_close (fd);
}
return is_wifi;
}