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wifi: split out WEXT handling code to make nl80211 conversion simpler

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This commit is contained in:
Dan Williams 2011-09-29 15:39:13 -05:00
parent 901536e823
commit 47eba095ec
5 changed files with 815 additions and 649 deletions
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2
src/Makefile.am
View file

@ -118,6 +118,8 @@ NetworkManager_SOURCES = \
nm-device-private.h \
nm-device-ethernet.c \
nm-device-ethernet.h \
wifi-utils.c \
wifi-utils.h \
nm-device-wifi.c \
nm-device-wifi.h \
nm-device-olpc-mesh.c \

689
src/nm-device-wifi.c
View file

@ -57,6 +57,7 @@
#include "nm-setting-ip6-config.h"
#include "nm-system.h"
#include "nm-settings-connection.h"
#include "wifi-utils.h"
static gboolean impl_device_get_access_points (NMDeviceWifi *device,
GPtrArray **aps,
@ -132,12 +133,7 @@ struct _NMDeviceWifiPrivate {
guint ipw_rfkill_id;
RfKillState ipw_rfkill_state;
GByteArray * ssid;
gint8 invalid_strength_counter;
iwqual max_qual;
gint8 num_freqs;
guint32 freqs[IW_MAX_FREQUENCIES];
GSList * ap_list;
NMAccessPoint * current_ap;
@ -149,18 +145,15 @@ struct _NMDeviceWifiPrivate {
guint pending_scan_id;
Supplicant supplicant;
WifiData * wifi_data;
guint32 failed_link_count;
guint periodic_source_id;
guint link_timeout_id;
/* Static options from driver */
guint32 capabilities;
gboolean has_scan_capa_ssid;
NMDeviceWifiCapabilities capabilities;
};
static guint32 nm_device_wifi_get_frequency (NMDeviceWifi *self);
static gboolean request_wireless_scan (gpointer user_data);
static void schedule_scan (NMDeviceWifi *self, gboolean backoff);
@ -301,319 +294,12 @@ ipw_rfkill_state_work (gpointer user_data)
/*****************************************************************/
/*
* wireless_qual_to_percent
*
* Convert an iw_quality structure from SIOCGIWSTATS into a magical signal
* strength percentage.
*
*/
static int
wireless_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);
nm_log_dbg (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);
/* A sort of signal-to-noise ratio calculation */
level_percent = (int)(100 - 70 *(
((double)max_level - (double)level) /
((double)max_level - (double)noise)));
nm_log_dbg (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));
nm_log_dbg (LOGD_WIFI, "QL2: level_percent is %d. max_level %d, level %d.",
level_percent, max_qual->level, level);
} else if (percent == -1) {
nm_log_dbg (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;
nm_log_dbg (LOGD_WIFI, "QL: Final quality percent is %d (%d).",
percent, CLAMP (percent, 0, 100));
return (CLAMP (percent, 0, 100));
}
/*
* nm_device_wifi_update_signal_strength
*
* Update the device's idea of the strength of its connection to the
* current access point.
*
*/
static void
nm_device_wifi_update_signal_strength (NMDeviceWifi *self,
NMAccessPoint *ap)
{
NMDeviceWifiPrivate *priv = NM_DEVICE_WIFI_GET_PRIVATE (self);
const char *iface = nm_device_get_iface (NM_DEVICE (self));
int fd, percent = -1;
fd = socket (PF_INET, SOCK_DGRAM, 0);
if (fd >= 0) {
struct iwreq wrq;
struct iw_statistics stats;
memset (&stats, 0, sizeof (stats));
wrq.u.data.pointer = &stats;
wrq.u.data.length = sizeof (stats);
wrq.u.data.flags = 1; /* Clear updated flag */
strncpy (wrq.ifr_name, iface, IFNAMSIZ);
if (ioctl (fd, SIOCGIWSTATS, &wrq) == 0)
percent = wireless_qual_to_percent (&stats.qual, &priv->max_qual);
close (fd);
}
/* Try to smooth out the strength. Atmel cards, for example, will give no strength
* one second and normal strength the next.
*/
if (percent >= 0 || ++priv->invalid_strength_counter > 3) {
nm_ap_set_strength (ap, (gint8) percent);
priv->invalid_strength_counter = 0;
}
}
static gboolean
wireless_get_range (NMDeviceWifi *self,
struct iw_range *range,
guint32 *response_len)
{
int fd, i = 26;
gboolean success = FALSE;
const char *iface;
struct iwreq wrq;
g_return_val_if_fail (NM_IS_DEVICE_WIFI (self), FALSE);
g_return_val_if_fail (range != NULL, FALSE);
iface = nm_device_get_iface (NM_DEVICE (self));
fd = socket (PF_INET, SOCK_DGRAM, 0);
if (fd < 0) {
nm_log_err (LOGD_HW, "(%s): couldn't open control socket.", iface);
return FALSE;
}
memset (&wrq, 0, sizeof (struct iwreq));
strncpy (wrq.ifr_name, iface, IFNAMSIZ);
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 (fd, SIOCGIWRANGE, &wrq) == 0) {
if (response_len)
*response_len = wrq.u.data.length;
success = TRUE;
break;
} else if (errno != EAGAIN) {
nm_log_err (LOGD_HW | LOGD_WIFI,
"(%s): couldn't get driver range information (%d).",
iface, errno);
break;
}
g_usleep (G_USEC_PER_SEC / 4);
}
if (i <= 0) {
nm_log_warn (LOGD_HW | LOGD_WIFI,
"(%s): driver took too long to respond to IWRANGE query.",
iface);
}
close (fd);
return success;
}
static guint32
real_get_generic_capabilities (NMDevice *dev)
{
int fd, err;
guint32 caps = NM_DEVICE_CAP_NONE;
struct iwreq wrq;
const char *iface = nm_device_get_iface (dev);
fd = socket (PF_INET, SOCK_DGRAM, 0);
if (fd < 0) {
nm_log_err (LOGD_HW, "(%s): couldn't open control socket.", iface);
return NM_DEVICE_CAP_NONE;
}
/* Cards that don't scan aren't supported */
memset (&wrq, 0, sizeof (struct iwreq));
strncpy (wrq.ifr_name, iface, IFNAMSIZ);
err = ioctl (fd, SIOCSIWSCAN, &wrq);
close (fd);
if ((err < 0) && (errno == EOPNOTSUPP))
caps = NM_DEVICE_CAP_NONE;
else
caps |= NM_DEVICE_CAP_NM_SUPPORTED;
return caps;
return NM_DEVICE_CAP_NM_SUPPORTED;
}
#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
get_wireless_capabilities (NMDeviceWifi *self, iwrange *range)
{
guint32 caps = NM_WIFI_DEVICE_CAP_NONE;
const char * iface;
g_return_val_if_fail (self != NULL, NM_WIFI_DEVICE_CAP_NONE);
g_return_val_if_fail (range != NULL, NM_WIFI_DEVICE_CAP_NONE);
iface = nm_device_get_iface (NM_DEVICE (self));
/* 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))) {
nm_log_warn (LOGD_WIFI, "%s: device supports WPA ciphers but not WPA protocol; "
"WPA unavailable.", iface);
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))) {
nm_log_warn (LOGD_WIFI, "%s: device supports WPA protocol but not WPA ciphers; "
"WPA unavailable.", iface);
caps &= ~WPA_CAPS;
}
return caps;
}
static guint32 iw_freq_to_uint32 (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) * pow (10, freq->e) / 1000000);
}
/* 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... */
};
static GObject*
constructor (GType type,
guint n_construct_params,
@ -623,11 +309,6 @@ constructor (GType type,
GObjectClass *klass;
NMDeviceWifi *self;
NMDeviceWifiPrivate *priv;
struct iw_range range;
struct iw_range_with_scan_capa *scan_capa_range;
guint32 response_len = 0;
gboolean success;
int i;
klass = G_OBJECT_CLASS (nm_device_wifi_parent_class);
object = klass->constructor (type, n_construct_params, construct_params);
@ -641,51 +322,15 @@ constructor (GType type,
nm_device_get_iface (NM_DEVICE (self)),
nm_device_get_ifindex (NM_DEVICE (self)));
memset (&range, 0, sizeof (struct iw_range));
success = wireless_get_range (NM_DEVICE_WIFI (object), &range, &response_len);
if (!success) {
nm_log_info (LOGD_HW | LOGD_WIFI, "(%s): driver WEXT range request failed",
priv->wifi_data = wifi_utils_init (nm_device_get_iface (NM_DEVICE (self)),
nm_device_get_ifindex (NM_DEVICE (self)));
if (priv->wifi_data == NULL) {
nm_log_warn (LOGD_HW | LOGD_WIFI, "(%s): failed to initialize WiFi driver",
nm_device_get_iface (NM_DEVICE (self)));
goto error;
g_object_unref (object);
return NULL;
}
if ((response_len < 300) || (range.we_version_compiled < 21)) {
nm_log_info (LOGD_HW | LOGD_WIFI,
"(%s): driver WEXT version too old (got %d, expected >= 21)",
nm_device_get_iface (NM_DEVICE (self)),
range.we_version_compiled);
goto error;
}
priv->max_qual.qual = range.max_qual.qual;
priv->max_qual.level = range.max_qual.level;
priv->max_qual.noise = range.max_qual.noise;
priv->max_qual.updated = range.max_qual.updated;
priv->num_freqs = MIN (range.num_frequency, IW_MAX_FREQUENCIES);
for (i = 0; i < priv->num_freqs; i++)
priv->freqs[i] = iw_freq_to_uint32 (&range.freq[i]);
/* 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 *) &range;
if (scan_capa_range->scan_capa & NM_IW_SCAN_CAPA_ESSID) {
priv->has_scan_capa_ssid = TRUE;
nm_log_info (LOGD_HW | LOGD_WIFI,
"(%s): driver supports SSID scans (scan_capa 0x%02X).",
nm_device_get_iface (NM_DEVICE (self)),
scan_capa_range->scan_capa);
} else {
nm_log_info (LOGD_HW | LOGD_WIFI,
"(%s): driver does not support SSID scans (scan_capa 0x%02X).",
nm_device_get_iface (NM_DEVICE (self)),
scan_capa_range->scan_capa);
}
/* 802.11 wireless-specific capabilities */
priv->capabilities = get_wireless_capabilities (self, &range);
priv->capabilities = wifi_utils_get_caps (priv->wifi_data);
/* Connect to the supplicant manager */
priv->supplicant.mgr = nm_supplicant_manager_get ();
@ -708,10 +353,6 @@ constructor (GType type,
priv->ipw_rfkill_state = nm_device_wifi_get_ipw_rfkill_state (self);
return object;
error:
g_object_unref (object);
return NULL;
}
static gboolean
@ -839,16 +480,16 @@ get_active_ap (NMDeviceWifi *self,
NMDeviceWifiPrivate *priv = NM_DEVICE_WIFI_GET_PRIVATE (self);
const char *iface = nm_device_get_iface (NM_DEVICE (self));
struct ether_addr bssid;
const GByteArray *ssid;
GByteArray *ssid;
GSList *iter;
int i = 0;
NMAccessPoint *match_nofreq = NULL;
NMAccessPoint *match_nofreq = NULL, *active_ap = NULL;
gboolean found_a_band = FALSE;
gboolean found_bg_band = FALSE;
NM80211Mode devmode;
guint32 devfreq;
nm_device_wifi_get_bssid (self, &bssid);
wifi_utils_get_bssid (priv->wifi_data, &bssid);
nm_log_dbg (LOGD_WIFI, "(%s): active BSSID: %02x:%02x:%02x:%02x:%02x:%02x",
iface,
bssid.ether_addr_octet[0], bssid.ether_addr_octet[1],
@ -858,15 +499,15 @@ get_active_ap (NMDeviceWifi *self,
if (!nm_ethernet_address_is_valid (&bssid))
return NULL;
ssid = nm_device_wifi_get_ssid (self);
ssid = wifi_utils_get_ssid (priv->wifi_data);
nm_log_dbg (LOGD_WIFI, "(%s): active SSID: %s%s%s",
iface,
ssid ? "'" : "",
ssid ? nm_utils_escape_ssid (ssid->data, ssid->len) : "(none)",
ssid ? "'" : "");
devmode = nm_device_wifi_get_mode (self);
devfreq = nm_device_wifi_get_frequency (self);
devmode = wifi_utils_get_mode (priv->wifi_data);
devfreq = wifi_utils_get_freq (priv->wifi_data);
/* When matching hidden APs, do a second pass that ignores the SSID check,
* because NM might not yet know the SSID of the hidden AP in the scan list
@ -930,7 +571,8 @@ get_active_ap (NMDeviceWifi *self,
// FIXME: handle security settings here too
nm_log_dbg (LOGD_WIFI, " matched");
return ap;
active_ap = ap;
goto done;
}
}
@ -957,11 +599,15 @@ get_active_ap (NMDeviceWifi *self,
ap_bssid->ether_addr_octet[2], ap_bssid->ether_addr_octet[3],
ap_bssid->ether_addr_octet[4], ap_bssid->ether_addr_octet[5]);
return match_nofreq;
active_ap = match_nofreq;
}
nm_log_dbg (LOGD_WIFI, " No matching AP found.");
return NULL;
done:
if (ssid)
g_byte_array_free (ssid, TRUE);
return active_ap;
}
static void
@ -1038,7 +684,7 @@ periodic_update (NMDeviceWifi *self)
{
NMDeviceWifiPrivate *priv = NM_DEVICE_WIFI_GET_PRIVATE (self);
NMAccessPoint *new_ap;
guint32 new_rate;
guint32 new_rate, percent;
/* In IBSS mode, most newer firmware/drivers do "BSS coalescing" where
* multiple IBSS stations using the same SSID will eventually switch to
@ -1051,7 +697,7 @@ periodic_update (NMDeviceWifi *self)
if (priv->current_ap && (nm_ap_get_mode (priv->current_ap) == NM_802_11_MODE_ADHOC)) {
struct ether_addr bssid = { {0x0, 0x0, 0x0, 0x0, 0x0, 0x0} };
nm_device_wifi_get_bssid (self, &bssid);
wifi_utils_get_bssid (priv->wifi_data, &bssid);
/* 0x02 means "locally administered" and should be OR-ed into
* the first byte of IBSS BSSIDs.
*/
@ -1061,8 +707,16 @@ periodic_update (NMDeviceWifi *self)
}
new_ap = get_active_ap (self, NULL, FALSE);
if (new_ap)
nm_device_wifi_update_signal_strength (self, new_ap);
if (new_ap) {
/* Try to smooth out the strength. Atmel cards, for example, will give no strength
* one second and normal strength the next.
*/
percent = wifi_utils_get_qual (priv->wifi_data);
if (percent >= 0 || ++priv->invalid_strength_counter > 3) {
nm_ap_set_strength (new_ap, (gint8) percent);
priv->invalid_strength_counter = 0;
}
}
if ((new_ap || priv->current_ap) && (new_ap != priv->current_ap)) {
const struct ether_addr *new_bssid = NULL;
@ -1305,7 +959,7 @@ real_deactivate (NMDevice *dev)
/* Ensure we're in infrastructure mode after deactivation; some devices
* (usually older ones) don't scan well in adhoc mode.
*/
nm_device_wifi_set_mode (self, NM_802_11_MODE_INFRA);
wifi_utils_set_mode (priv->wifi_data, NM_802_11_MODE_INFRA);
}
static gboolean
@ -1725,191 +1379,6 @@ impl_device_get_access_points (NMDeviceWifi *self,
return TRUE;
}
/*
* nm_device_get_mode
*
* Get managed/infrastructure/adhoc mode on a device
*
*/
NM80211Mode
nm_device_wifi_get_mode (NMDeviceWifi *self)
{
int fd;
NM80211Mode mode = NM_802_11_MODE_UNKNOWN;
const char *iface;
struct iwreq wrq;
g_return_val_if_fail (self != NULL, NM_802_11_MODE_UNKNOWN);
fd = socket (PF_INET, SOCK_DGRAM, 0);
if (fd < 0)
goto out;
memset (&wrq, 0, sizeof (struct iwreq));
iface = nm_device_get_iface (NM_DEVICE (self));
strncpy (wrq.ifr_name, iface, IFNAMSIZ);
if (ioctl (fd, SIOCGIWMODE, &wrq) == 0) {
switch (wrq.u.mode) {
case IW_MODE_ADHOC:
mode = NM_802_11_MODE_ADHOC;
break;
case IW_MODE_INFRA:
mode = NM_802_11_MODE_INFRA;
break;
default:
break;
}
} else {
if (errno != ENODEV)
nm_log_warn (LOGD_HW | LOGD_WIFI, "(%s): error %d getting card mode", iface, errno);
}
close (fd);
out:
return mode;
}
/*
* nm_device_wifi_set_mode
*
* Set managed/infrastructure/adhoc mode on a device
*
*/
gboolean
nm_device_wifi_set_mode (NMDeviceWifi *self, const NM80211Mode mode)
{
int fd;
const char *iface;
gboolean success = FALSE;
struct iwreq wrq;
g_return_val_if_fail (self != NULL, FALSE);
g_return_val_if_fail ((mode == NM_802_11_MODE_INFRA) || (mode == NM_802_11_MODE_ADHOC), FALSE);
if (nm_device_wifi_get_mode (self) == mode)
return TRUE;
fd = socket (PF_INET, SOCK_DGRAM, 0);
if (fd < 0)
goto out;
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_INFRA:
wrq.u.mode = IW_MODE_INFRA;
break;
default:
goto out;
}
iface = nm_device_get_iface (NM_DEVICE (self));
strncpy (wrq.ifr_name, iface, IFNAMSIZ);
if (ioctl (fd, SIOCSIWMODE, &wrq) < 0) {
if (errno != ENODEV)
nm_log_err (LOGD_HW | LOGD_WIFI, "(%s): error setting mode %d", iface, mode);
} else
success = TRUE;
close (fd);
out:
return success;
}
/*
* nm_device_wifi_get_frequency
*
* Get current frequency
*
*/
static guint32
nm_device_wifi_get_frequency (NMDeviceWifi *self)
{
int fd;
guint32 freq = 0;
const char *iface;
struct iwreq wrq;
g_return_val_if_fail (self != NULL, 0);
fd = socket (PF_INET, SOCK_DGRAM, 0);
if (fd < 0)
return 0;
memset (&wrq, 0, sizeof (struct iwreq));
iface = nm_device_get_iface (NM_DEVICE (self));
strncpy (wrq.ifr_name, iface, IFNAMSIZ);
if (ioctl (fd, SIOCGIWFREQ, &wrq) < 0) {
nm_log_warn (LOGD_HW | LOGD_WIFI,
"(%s): error getting frequency: %s",
iface, strerror (errno));
} else
freq = iw_freq_to_uint32 (&wrq.u.freq);
close (fd);
return freq;
}
/*
* nm_device_wifi_get_ssid
*
* If a device is wireless, return the ssid that it is attempting
* to use.
*/
const GByteArray *
nm_device_wifi_get_ssid (NMDeviceWifi *self)
{
NMDeviceWifiPrivate *priv;
int sk;
struct iwreq wrq;
char ssid[IW_ESSID_MAX_SIZE + 2];
guint32 len;
g_return_val_if_fail (self != NULL, NULL);
priv = NM_DEVICE_WIFI_GET_PRIVATE (self);
sk = socket (AF_INET, SOCK_DGRAM, 0);
if (sk == -1) {
nm_log_err (LOGD_HW, "couldn't create socket: %d.", errno);
return NULL;
}
memset (ssid, 0, sizeof (ssid));
wrq.u.essid.pointer = (caddr_t) &ssid;
wrq.u.essid.length = sizeof (ssid);
wrq.u.essid.flags = 0;
strncpy (wrq.ifr_name, nm_device_get_iface (NM_DEVICE (self)), IFNAMSIZ);
if (ioctl (sk, SIOCGIWESSID, &wrq) < 0) {
nm_log_err (LOGD_HW | LOGD_WIFI, "(%s): couldn't get SSID: %d",
nm_device_get_iface (NM_DEVICE (self)), errno);
goto out;
}
if (priv->ssid) {
g_byte_array_free (priv->ssid, TRUE);
priv->ssid = NULL;
}
len = wrq.u.essid.length;
if (!nm_utils_is_empty_ssid ((guint8 *) ssid, len)) {
priv->ssid = g_byte_array_sized_new (len);
g_byte_array_append (priv->ssid, (const guint8 *) ssid, len);
}
out:
close (sk);
return priv->ssid;
}
/*
* nm_device_wifi_get_bitrate
*
@ -1937,39 +1406,6 @@ nm_device_wifi_get_bitrate (NMDeviceWifi *self)
return ((err == 0) ? wrq.u.bitrate.value / 1000 : 0);
}
/*
* nm_device_get_bssid
*
* If a device is wireless, get the access point's ethernet address
* that the card is associated with.
*/
void
nm_device_wifi_get_bssid (NMDeviceWifi *self,
struct ether_addr *bssid)
{
int fd;
struct iwreq wrq;
g_return_if_fail (self != NULL);
g_return_if_fail (bssid != NULL);
memset (bssid, 0, sizeof (struct ether_addr));
fd = socket (PF_INET, SOCK_DGRAM, 0);
if (fd < 0) {
nm_log_err (LOGD_WIFI, "failed to open control socket.");
return;
}
memset (&wrq, 0, sizeof (wrq));
strncpy (wrq.ifr_name, nm_device_get_iface (NM_DEVICE (self)), IFNAMSIZ);
if (ioctl (fd, SIOCGIWAP, &wrq) == 0)
memcpy (bssid->ether_addr_octet, &(wrq.u.ap_addr.sa_data), ETH_ALEN);
close (fd);
}
static gboolean
scanning_allowed (NMDeviceWifi *self)
{
@ -2921,23 +2357,6 @@ remove_supplicant_timeouts (NMDeviceWifi *self)
remove_link_timeout (self);
}
static guint32
find_supported_frequency (NMDeviceWifi *self, const guint32 *freqs)
{
NMDeviceWifiPrivate *priv = NM_DEVICE_WIFI_GET_PRIVATE (self);
int i;
for (i = 0; i < priv->num_freqs; i++) {
while (*freqs) {
if (priv->freqs[i] == *freqs)
return *freqs;
freqs++;
}
}
return 0;
}
static NMSupplicantConfig *
build_supplicant_config (NMDeviceWifi *self,
NMConnection *connection,
@ -2970,9 +2389,9 @@ build_supplicant_config (NMDeviceWifi *self,
adhoc_freq = nm_ap_get_freq (ap);
if (!adhoc_freq) {
if (g_strcmp0 (band, "a") == 0)
adhoc_freq = find_supported_frequency (self, a_freqs);
adhoc_freq = wifi_utils_find_freq (priv->wifi_data, a_freqs);
else
adhoc_freq = find_supported_frequency (self, bg_freqs);
adhoc_freq = wifi_utils_find_freq (priv->wifi_data, bg_freqs);
}
if (!adhoc_freq) {
@ -2987,7 +2406,7 @@ build_supplicant_config (NMDeviceWifi *self,
s_wireless,
nm_ap_get_broadcast (ap),
adhoc_freq,
priv->has_scan_capa_ssid)) {
wifi_utils_can_scan_ssid (priv->wifi_data))) {
nm_log_err (LOGD_WIFI, "Couldn't add 802-11-wireless setting to supplicant config.");
goto error;
}
@ -3483,11 +2902,11 @@ activation_success_handler (NMDevice *dev)
* But if activation was successful, the card will know the BSSID. Grab
* the BSSID off the card and fill in the BSSID of the activation AP.
*/
nm_device_wifi_get_bssid (self, &bssid);
wifi_utils_get_bssid (priv->wifi_data, &bssid);
if (!nm_ethernet_address_is_valid (nm_ap_get_address (ap)))
nm_ap_set_address (ap, &bssid);
if (!nm_ap_get_freq (ap))
nm_ap_set_freq (ap, nm_device_wifi_get_frequency (self));
nm_ap_set_freq (ap, wifi_utils_get_freq (priv->wifi_data));
if (!nm_ap_get_max_bitrate (ap))
nm_ap_set_max_bitrate (ap, nm_device_wifi_get_bitrate (self));
@ -3632,12 +3051,6 @@ device_state_changed (NMDevice *device,
* the device is now ready to use.
*/
if (priv->enabled && (nm_device_get_firmware_missing (device) == FALSE)) {
gboolean success;
struct iw_range range;
/* Wait for some drivers like ipw3945 to come back to life */
success = wireless_get_range (self, &range, NULL);
if (!priv->supplicant.iface)
supplicant_interface_acquire (self);
}
@ -3706,8 +3119,7 @@ real_set_enabled (NMDeviceInterface *device, gboolean enabled)
}
if (enabled) {
gboolean no_firmware = FALSE, success;
struct iw_range range;
gboolean no_firmware = FALSE;
if (state != NM_DEVICE_STATE_UNAVAILABLE)
nm_log_warn (LOGD_CORE, "not in expected unavailable state!");
@ -3725,9 +3137,6 @@ real_set_enabled (NMDeviceInterface *device, gboolean enabled)
return;
}
/* Wait for some drivers like ipw3945 to come back to life */
success = wireless_get_range (self, &range, NULL);
/* Re-initialize the supplicant interface and wait for it to be ready */
if (priv->supplicant.iface)
supplicant_interface_release (self);
@ -3802,14 +3211,12 @@ dispose (GObject *object)
priv->supplicant.mgr = NULL;
}
if (priv->ssid) {
g_byte_array_free (priv->ssid, TRUE);
priv->ssid = NULL;
}
set_current_ap (self, NULL);
remove_all_aps (self);
if (priv->wifi_data)
wifi_utils_deinit (priv->wifi_data);
g_free (priv->ipw_rfkill_path);
if (priv->ipw_rfkill_id) {
g_source_remove (priv->ipw_rfkill_id);
@ -3834,7 +3241,7 @@ get_property (GObject *object, guint prop_id,
g_value_take_string (value, nm_ether_ntop ((struct ether_addr *) &priv->perm_hw_addr));
break;
case PROP_MODE:
g_value_set_uint (value, nm_device_wifi_get_mode (device));
g_value_set_uint (value, wifi_utils_get_mode (priv->wifi_data));
break;
case PROP_BITRATE:
g_value_set_uint (value, priv->rate);

8
src/nm-device-wifi.h
View file

@ -88,14 +88,6 @@ NMDevice *nm_device_wifi_new (const char *udi,
void nm_device_wifi_get_address (NMDeviceWifi *dev, struct ether_addr *addr);
void nm_device_wifi_get_bssid (NMDeviceWifi *dev, struct ether_addr *bssid);
const GByteArray * nm_device_wifi_get_ssid (NMDeviceWifi *self);
gboolean nm_device_wifi_set_mode (NMDeviceWifi *self, const NM80211Mode mode);
NM80211Mode nm_device_wifi_get_mode (NMDeviceWifi *self);
NMAccessPoint * nm_device_wifi_get_activation_ap (NMDeviceWifi *self);
RfKillState nm_device_wifi_get_ipw_rfkill_state (NMDeviceWifi *self);

704
src/wifi-utils.c Normal file
View file

@ -0,0 +1,704 @@
/* -*- Mode: C; tab-width: 4; indent-tabs-mode: t; c-basic-offset: 4 -*- */
/* NetworkManager -- Network link manager
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Copyright (C) 2005 - 2011 Red Hat, Inc.
* Copyright (C) 2006 - 2008 Novell, Inc.
*/
#include <config.h>
#include <errno.h>
#include <string.h>
#include <sys/ioctl.h>
#include <net/ethernet.h>
#include <glib.h>
#include "wifi-utils.h"
#include "nm-logging.h"
#include "nm-utils.h"
struct WifiData {
char *iface;
int ifindex;
NMDeviceWifiCapabilities caps;
gboolean can_scan_ssid;
NM80211Mode (*get_mode) (WifiData *data);
gboolean (*set_mode) (WifiData *data, const NM80211Mode mode);
/* Return current frequency in MHz (really associated BSS frequency) */
guint32 (*get_freq) (WifiData *data);
/* Return first supported frequency in the zero-terminated list */
guint32 (*find_freq) (WifiData *data, const guint32 *freqs);
/* If SSID is empty/blank (zero-length or all \0s) return NULL */
GByteArray * (*get_ssid) (WifiData *data);
/* Return current bitrate in Kbps */
guint32 (*get_rate) (WifiData *data);
gboolean (*get_bssid) (WifiData *data, struct ether_addr *out_bssid);
/* Return a signal strength percentage 0 - 100% for the current BSSID;
* return -1 on errors or if not associated.
*/
int (*get_qual) (WifiData *data);
void (*deinit) (WifiData *data);
};
static gpointer
wifi_data_new (const char *iface, int ifindex, gsize len)
{
WifiData *data;
data = g_malloc0 (len);
data->iface = g_strdup (iface);
data->ifindex = ifindex;
return data;
}
static void
wifi_data_free (WifiData *data)
{
g_free (data->iface);
memset (data, 0, sizeof (*data));
g_free (data);
}
/***************************************************************/
#include <iwlib.h>
typedef struct {
WifiData parent;
int fd;
iwqual max_qual;
gint8 num_freqs;
guint32 freqs[IW_MAX_FREQUENCIES];
} WifiDataWext;
/* 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... */
};
static guint32
iw_freq_to_uint32 (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) * pow (10, freq->e) / 1000000);
}
static void
wifi_wext_deinit (WifiData *parent)
{
WifiDataWext *wext = (WifiDataWext *) parent;
if (wext->fd >= 0)
close (wext->fd);
}
static NM80211Mode
wifi_wext_get_mode (WifiData *data)
{
WifiDataWext *wext = (WifiDataWext *) data;
struct iwreq wrq;
memset (&wrq, 0, sizeof (struct iwreq));
strncpy (wrq.ifr_name, wext->parent.iface, IFNAMSIZ);
if (ioctl (wext->fd, SIOCGIWMODE, &wrq) < 0) {
if (errno != ENODEV) {
nm_log_warn (LOGD_HW | LOGD_WIFI,
"(%s): error %d getting card mode",
wext->parent.iface, errno);
}
return NM_802_11_MODE_UNKNOWN;
}
switch (wrq.u.mode) {
case IW_MODE_ADHOC:
return NM_802_11_MODE_ADHOC;
case IW_MODE_INFRA:
return NM_802_11_MODE_INFRA;
default:
break;
}
return NM_802_11_MODE_UNKNOWN;
}
static gboolean
wifi_wext_set_mode (WifiData *data, const NM80211Mode mode)
{
WifiDataWext *wext = (WifiDataWext *) data;
struct iwreq wrq;
if (wifi_wext_get_mode (data) == 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_INFRA:
wrq.u.mode = IW_MODE_INFRA;
break;
default:
g_warn_if_reached ();
return FALSE;
}
strncpy (wrq.ifr_name, wext->parent.iface, IFNAMSIZ);
if (ioctl (wext->fd, SIOCSIWMODE, &wrq) < 0) {
if (errno != ENODEV) {
nm_log_err (LOGD_HW | LOGD_WIFI, "(%s): error setting mode %d",
wext->parent.iface, mode);
}
return FALSE;
}
return TRUE;
}
static guint32
wifi_wext_get_freq (WifiData *data)
{
WifiDataWext *wext = (WifiDataWext *) data;
struct iwreq wrq;
memset (&wrq, 0, sizeof (struct iwreq));
strncpy (wrq.ifr_name, wext->parent.iface, IFNAMSIZ);
if (ioctl (wext->fd, SIOCGIWFREQ, &wrq) < 0) {
nm_log_warn (LOGD_HW | LOGD_WIFI,
"(%s): error getting frequency: %s",
wext->parent.iface, strerror (errno));
return 0;
}
return iw_freq_to_uint32 (&wrq.u.freq);
}
static guint32
wifi_wext_find_freq (WifiData *data, const guint32 *freqs)
{
WifiDataWext *wext = (WifiDataWext *) data;
int i;
for (i = 0; i < wext->num_freqs; i++) {
while (*freqs) {
if (wext->freqs[i] == *freqs)
return *freqs;
freqs++;
}
}
return 0;
}
static GByteArray *
wifi_wext_get_ssid (WifiData *data)
{
WifiDataWext *wext = (WifiDataWext *) data;
struct iwreq wrq;
char ssid[IW_ESSID_MAX_SIZE + 2];
guint32 len;
GByteArray *array = NULL;
memset (ssid, 0, sizeof (ssid));
wrq.u.essid.pointer = (caddr_t) &ssid;
wrq.u.essid.length = sizeof (ssid);
wrq.u.essid.flags = 0;
strncpy (wrq.ifr_name, wext->parent.iface, IFNAMSIZ);
if (ioctl (wext->fd, SIOCGIWESSID, &wrq) < 0) {
nm_log_err (LOGD_HW | LOGD_WIFI, "(%s): couldn't get SSID: %d",
wext->parent.iface, errno);
return NULL;
}
len = wrq.u.essid.length;
if (nm_utils_is_empty_ssid ((guint8 *) ssid, len) == FALSE) {
array = g_byte_array_sized_new (len);
g_byte_array_append (array, (const guint8 *) ssid, len);
}
return array;
}
static gboolean
wifi_wext_get_bssid (WifiData *data, struct ether_addr *out_bssid)
{
WifiDataWext *wext = (WifiDataWext *) data;
struct iwreq wrq;
memset (&wrq, 0, sizeof (wrq));
strncpy (wrq.ifr_name, wext->parent.iface, IFNAMSIZ);
if (ioctl (wext->fd, SIOCGIWAP, &wrq) < 0) {
nm_log_warn (LOGD_HW | LOGD_WIFI,
"(%s): error getting associated BSSID: %s",
wext->parent.iface, strerror (errno));
return FALSE;
}
memcpy (out_bssid->ether_addr_octet, &(wrq.u.ap_addr.sa_data), ETH_ALEN);
return TRUE;
}
static guint32
wifi_wext_get_rate (WifiData *data)
{
WifiDataWext *wext = (WifiDataWext *) data;
struct iwreq wrq;
int err;
memset (&wrq, 0, sizeof (wrq));
strncpy (wrq.ifr_name, wext->parent.iface, IFNAMSIZ);
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 */
nm_log_dbg (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);
/* A sort of signal-to-noise ratio calculation */
level_percent = (int)(100 - 70 *(
((double)max_level - (double)level) /
((double)max_level - (double)noise)));
nm_log_dbg (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));
nm_log_dbg (LOGD_WIFI, "QL2: level_percent is %d. max_level %d, level %d.",
level_percent, max_qual->level, level);
} else if (percent == -1) {
nm_log_dbg (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;
nm_log_dbg (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 (WifiData *data)
{
WifiDataWext *wext = (WifiDataWext *) data;
struct iwreq wrq;
struct iw_statistics stats;
memset (&stats, 0, sizeof (stats));
wrq.u.data.pointer = &stats;
wrq.u.data.length = sizeof (stats);
wrq.u.data.flags = 1; /* Clear updated flag */
strncpy (wrq.ifr_name, wext->parent.iface, IFNAMSIZ);
if (ioctl (wext->fd, SIOCGIWSTATS, &wrq) < 0) {
nm_log_warn (LOGD_HW | LOGD_WIFI,
"(%s): error getting signal strength: %s",
wext->parent.iface, strerror (errno));
return -1;
}
return wext_qual_to_percent (&stats.qual, &wext->max_qual);
}
static gboolean
wext_can_scan (WifiDataWext *wext)
{
struct iwreq wrq;
memset (&wrq, 0, sizeof (struct iwreq));
strncpy (wrq.ifr_name, wext->parent.iface, IFNAMSIZ);
if (ioctl (wext->fd, SIOCSIWSCAN, &wrq) < 0) {
if (errno == EOPNOTSUPP)
return FALSE;
}
return TRUE;
}
static gboolean
wext_get_range (WifiDataWext *wext,
struct iw_range *range,
guint32 *response_len)
{
int i = 26;
gboolean success = FALSE;
struct iwreq wrq;
memset (&wrq, 0, sizeof (struct iwreq));
strncpy (wrq.ifr_name, wext->parent.iface, IFNAMSIZ);
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 if (errno != EAGAIN) {
nm_log_err (LOGD_HW | LOGD_WIFI,
"(%s): couldn't get driver range information (%d).",
wext->parent.iface, errno);
break;
}
g_usleep (G_USEC_PER_SEC / 4);
}
if (i <= 0) {
nm_log_warn (LOGD_HW | LOGD_WIFI,
"(%s): driver took too long to respond to IWRANGE query.",
wext->parent.iface);
}
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 (WifiDataWext *wext, iwrange *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))) {
nm_log_warn (LOGD_WIFI, "%s: device supports WPA ciphers but not WPA protocol; "
"WPA unavailable.", wext->parent.iface);
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))) {
nm_log_warn (LOGD_WIFI, "%s: device supports WPA protocol but not WPA ciphers; "
"WPA unavailable.", wext->parent.iface);
caps &= ~WPA_CAPS;
}
return caps;
}
static WifiData *
wifi_wext_init (const char *iface, int ifindex)
{
WifiDataWext *wext;
struct iw_range range;
guint32 response_len = 0;
struct iw_range_with_scan_capa *scan_capa_range;
int i;
wext = wifi_data_new (iface, ifindex, sizeof (*wext));
wext->parent.get_mode = wifi_wext_get_mode;
wext->parent.set_mode = wifi_wext_set_mode;
wext->parent.get_freq = wifi_wext_get_freq;
wext->parent.find_freq = wifi_wext_find_freq;
wext->parent.get_ssid = wifi_wext_get_ssid;
wext->parent.get_bssid = wifi_wext_get_bssid;
wext->parent.get_rate = wifi_wext_get_rate;
wext->parent.get_qual = wifi_wext_get_qual;
wext->parent.deinit = wifi_wext_deinit;
wext->fd = socket (PF_INET, SOCK_DGRAM, 0);
if (wext->fd < 0)
goto error;
memset (&range, 0, sizeof (struct iw_range));
if (wext_get_range (wext, &range, &response_len) == FALSE) {
nm_log_info (LOGD_HW | LOGD_WIFI, "(%s): driver WEXT range request failed",
wext->parent.iface);
goto error;
}
if ((response_len < 300) || (range.we_version_compiled < 21)) {
nm_log_info (LOGD_HW | LOGD_WIFI,
"(%s): driver WEXT version too old (got %d, expected >= 21)",
wext->parent.iface,
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]);
/* Check for scanning capability; cards that can't scan are not supported */
if (wext_can_scan (wext) == FALSE) {
nm_log_info (LOGD_HW | LOGD_WIFI,
"(%s): drivers that cannot scan are unsupported",
wext->parent.iface);
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 *) &range;
if (scan_capa_range->scan_capa & NM_IW_SCAN_CAPA_ESSID) {
wext->parent.can_scan_ssid = TRUE;
nm_log_info (LOGD_HW | LOGD_WIFI,
"(%s): driver supports SSID scans (scan_capa 0x%02X).",
wext->parent.iface,
scan_capa_range->scan_capa);
} else {
nm_log_info (LOGD_HW | LOGD_WIFI,
"(%s): driver does not support SSID scans (scan_capa 0x%02X).",
wext->parent.iface,
scan_capa_range->scan_capa);
}
wext->parent.caps = wext_get_caps (wext, &range);
return (WifiData *) wext;
error:
wifi_utils_deinit ((WifiData *) wext);
return NULL;
}
/***************************************************************/
WifiData *
wifi_utils_init (const char *iface, int ifindex)
{
g_return_val_if_fail (iface != NULL, NULL);
g_return_val_if_fail (ifindex > 0, NULL);
/* Determine WEXT vs. nl80211 here */
return wifi_wext_init (iface, ifindex);
}
NMDeviceWifiCapabilities
wifi_utils_get_caps (WifiData *data)
{
g_return_val_if_fail (data != NULL, NM_WIFI_DEVICE_CAP_NONE);
return data->caps;
}
gboolean
wifi_utils_can_scan_ssid (WifiData *data)
{
g_return_val_if_fail (data != NULL, FALSE);
return data->can_scan_ssid;
}
NM80211Mode
wifi_utils_get_mode (WifiData *data)
{
g_return_val_if_fail (data != NULL, NM_802_11_MODE_UNKNOWN);
return data->get_mode (data);
}
gboolean
wifi_utils_set_mode (WifiData *data, const NM80211Mode mode)
{
g_return_val_if_fail (data != NULL, FALSE);
g_return_val_if_fail ((mode == NM_802_11_MODE_INFRA) || (mode == NM_802_11_MODE_ADHOC), FALSE);
/* nl80211 probably doesn't need this */
if (data->set_mode)
return data->set_mode (data, mode);
return TRUE;
}
guint32
wifi_utils_get_freq (WifiData *data)
{
g_return_val_if_fail (data != NULL, 0);
return data->get_freq (data);
}
guint32
wifi_utils_find_freq (WifiData *data, const guint32 *freqs)
{
g_return_val_if_fail (data != NULL, 0);
g_return_val_if_fail (freqs != NULL, 0);
return data->find_freq (data, freqs);
}
GByteArray *
wifi_utils_get_ssid (WifiData *data)
{
g_return_val_if_fail (data != NULL, NULL);
return data->get_ssid (data);
}
gboolean
wifi_utils_get_bssid (WifiData *data, struct ether_addr *out_bssid)
{
g_return_val_if_fail (data != NULL, FALSE);
g_return_val_if_fail (out_bssid != NULL, FALSE);
memset (out_bssid, 0, sizeof (*out_bssid));
return data->get_bssid (data, out_bssid);
}
guint32
wifi_utils_get_rate (WifiData *data)
{
g_return_val_if_fail (data != NULL, 0);
return data->get_rate (data);
}
int
wifi_utils_get_qual (WifiData *data)
{
g_return_val_if_fail (data != NULL, 0);
return data->get_qual (data);
}
void
wifi_utils_deinit (WifiData *data)
{
g_return_if_fail (data != NULL);
data->deinit (data);
wifi_data_free (data);
}

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/* -*- Mode: C; tab-width: 4; indent-tabs-mode: t; c-basic-offset: 4 -*- */
/* NetworkManager -- Network link manager
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Copyright (C) 2005 - 2011 Red Hat, Inc.
* Copyright (C) 2006 - 2008 Novell, Inc.
*/
#ifndef WIFI_UTILS_H
#define WIFI_UTILS_H
#include <glib.h>
#include "NetworkManager.h"
typedef struct WifiData WifiData;
WifiData *wifi_utils_init (const char *iface, int ifindex);
void wifi_utils_deinit (WifiData *data);
NMDeviceWifiCapabilities wifi_utils_get_caps (WifiData *data);
gboolean wifi_utils_can_scan_ssid (WifiData *data);
NM80211Mode wifi_utils_get_mode (WifiData *data);
gboolean wifi_utils_set_mode (WifiData *data, const NM80211Mode mode);
/* Returns frequency in MHz */
guint32 wifi_utils_get_freq (WifiData *data);
/* Return the first supported frequency in the zero-terminated list */
guint32 wifi_utils_find_freq (WifiData *data, const guint32 *freqs);
/* Caller must free returned byte array */
GByteArray *wifi_utils_get_ssid (WifiData *data);
/* Caller must free returned byte array */
gboolean wifi_utils_get_bssid (WifiData *data, struct ether_addr *out_bssid);
/* Returns current bitrate in Kbps */
guint32 wifi_utils_get_rate (WifiData *data);
/* Returns quality 0 - 100% on succes, or -1 on error */
int wifi_utils_get_qual (WifiData *data);
#endif /* WIFI_UTILS_H */