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Migrated some of the channel verification code back into the driver to
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keep regulatory consistency in one location.

Signed-off-by: James Ketrenos
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Liu Hong authored and James Ketrenos committed Nov 7, 2005
1 parent f6c5cb7 commit 1fe0adb
Showing 1 changed file with 152 additions and 21 deletions.
173 changes: 152 additions & 21 deletions drivers/net/wireless/ipw2200.c
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Original file line number Diff line number Diff line change
Expand Up @@ -149,6 +149,12 @@ static int init_supported_rates(struct ipw_priv *priv,
static void ipw_set_hwcrypto_keys(struct ipw_priv *);
static void ipw_send_wep_keys(struct ipw_priv *, int);

static int ipw_is_valid_channel(struct ieee80211_device *, u8);
static int ipw_channel_to_index(struct ieee80211_device *, u8);
static u8 ipw_freq_to_channel(struct ieee80211_device *, u32);
static int ipw_set_geo(struct ieee80211_device *, const struct ieee80211_geo *);
static const struct ieee80211_geo *ipw_get_geo(struct ieee80211_device *);

static int snprint_line(char *buf, size_t count,
const u8 * data, u32 len, u32 ofs)
{
Expand Down Expand Up @@ -1596,7 +1602,7 @@ static ssize_t store_speed_scan(struct device *d, struct device_attribute *attr,
break;
}

if (ieee80211_is_valid_channel(priv->ieee, channel))
if (ipw_is_valid_channel(priv->ieee, channel))
priv->speed_scan[pos++] = channel;
else
IPW_WARNING("Skipping invalid channel request: %d\n",
Expand Down Expand Up @@ -2194,7 +2200,7 @@ static int ipw_send_tx_power(struct ipw_priv *priv, struct ipw_tx_power *power)

static int ipw_set_tx_power(struct ipw_priv *priv)
{
const struct ieee80211_geo *geo = ieee80211_get_geo(priv->ieee);
const struct ieee80211_geo *geo = ipw_get_geo(priv->ieee);
struct ipw_tx_power tx_power;
s8 max_power;
int i;
Expand Down Expand Up @@ -5503,6 +5509,15 @@ static int ipw_best_network(struct ipw_priv *priv,
return 0;
}

/* Filter out invalid channel in current GEO */
if (!ipw_is_valid_channel(priv->ieee, network->channel)) {
IPW_DEBUG_ASSOC("Network '%s (" MAC_FMT ")' excluded "
"because of invalid channel in current GEO\n",
escape_essid(network->ssid, network->ssid_len),
MAC_ARG(network->bssid));
return 0;
}

/* Ensure that the rates supported by the driver are compatible with
* this AP, including verification of basic rates (mandatory) */
if (!ipw_compatible_rates(priv, network, &rates)) {
Expand Down Expand Up @@ -5540,7 +5555,7 @@ static int ipw_best_network(struct ipw_priv *priv,
static void ipw_adhoc_create(struct ipw_priv *priv,
struct ieee80211_network *network)
{
const struct ieee80211_geo *geo = ieee80211_get_geo(priv->ieee);
const struct ieee80211_geo *geo = ipw_get_geo(priv->ieee);
int i;

/*
Expand All @@ -5555,10 +5570,10 @@ static void ipw_adhoc_create(struct ipw_priv *priv,
* FW fatal error.
*
*/
switch (ieee80211_is_valid_channel(priv->ieee, priv->channel)) {
switch (ipw_is_valid_channel(priv->ieee, priv->channel)) {
case IEEE80211_52GHZ_BAND:
network->mode = IEEE_A;
i = ieee80211_channel_to_index(priv->ieee, priv->channel);
i = ipw_channel_to_index(priv->ieee, priv->channel);
if (i == -1)
BUG();
if (geo->a[i].flags & IEEE80211_CH_PASSIVE_ONLY) {
Expand All @@ -5572,6 +5587,13 @@ static void ipw_adhoc_create(struct ipw_priv *priv,
network->mode = IEEE_G;
else
network->mode = IEEE_B;
i = ipw_channel_to_index(priv->ieee, priv->channel);
if (i == -1)
BUG();
if (geo->bg[i].flags & IEEE80211_CH_PASSIVE_ONLY) {
IPW_WARNING("Overriding invalid channel\n");
priv->channel = geo->bg[0].channel;
}
break;

default:
Expand Down Expand Up @@ -5899,7 +5921,7 @@ static void ipw_add_scan_channels(struct ipw_priv *priv,
const struct ieee80211_geo *geo;
int i;

geo = ieee80211_get_geo(priv->ieee);
geo = ipw_get_geo(priv->ieee);

if (priv->ieee->freq_band & IEEE80211_52GHZ_BAND) {
int start = channel_index;
Expand All @@ -5909,7 +5931,11 @@ static void ipw_add_scan_channels(struct ipw_priv *priv,
continue;
channel_index++;
scan->channels_list[channel_index] = geo->a[i].channel;
ipw_set_scan_type(scan, channel_index, scan_type);
ipw_set_scan_type(scan, channel_index,
geo->a[i].
flags & IEEE80211_CH_PASSIVE_ONLY ?
IPW_SCAN_PASSIVE_FULL_DWELL_SCAN :
scan_type);
}

if (start != channel_index) {
Expand All @@ -5922,6 +5948,7 @@ static void ipw_add_scan_channels(struct ipw_priv *priv,
if (priv->ieee->freq_band & IEEE80211_24GHZ_BAND) {
int start = channel_index;
if (priv->config & CFG_SPEED_SCAN) {
int index;
u8 channels[IEEE80211_24GHZ_CHANNELS] = {
/* nop out the list */
[0] = 0
Expand Down Expand Up @@ -5953,8 +5980,14 @@ static void ipw_add_scan_channels(struct ipw_priv *priv,
priv->speed_scan_pos++;
channel_index++;
scan->channels_list[channel_index] = channel;
index =
ipw_channel_to_index(priv->ieee, channel);
ipw_set_scan_type(scan, channel_index,
scan_type);
geo->bg[index].
flags &
IEEE80211_CH_PASSIVE_ONLY ?
IPW_SCAN_PASSIVE_FULL_DWELL_SCAN
: scan_type);
}
} else {
for (i = 0; i < geo->bg_channels; i++) {
Expand All @@ -5965,7 +5998,11 @@ static void ipw_add_scan_channels(struct ipw_priv *priv,
scan->channels_list[channel_index] =
geo->bg[i].channel;
ipw_set_scan_type(scan, channel_index,
scan_type);
geo->bg[i].
flags &
IEEE80211_CH_PASSIVE_ONLY ?
IPW_SCAN_PASSIVE_FULL_DWELL_SCAN
: scan_type);
}
}

Expand Down Expand Up @@ -6017,7 +6054,7 @@ static int ipw_request_scan(struct ipw_priv *priv)

scan.dwell_time[IPW_SCAN_ACTIVE_BROADCAST_AND_DIRECT_SCAN] =
cpu_to_le16(20);
scan.dwell_time[IPW_SCAN_PASSIVE_FULL_DWELL_SCAN] = cpu_to_le16(20);
scan.dwell_time[IPW_SCAN_PASSIVE_FULL_DWELL_SCAN] = cpu_to_le16(120);

scan.full_scan_index = cpu_to_le32(ieee80211_get_scans(priv->ieee));

Expand All @@ -6026,7 +6063,7 @@ static int ipw_request_scan(struct ipw_priv *priv)
u8 channel;
u8 band = 0;

switch (ieee80211_is_valid_channel(priv->ieee, priv->channel)) {
switch (ipw_is_valid_channel(priv->ieee, priv->channel)) {
case IEEE80211_52GHZ_BAND:
band = (u8) (IPW_A_MODE << 6) | 1;
channel = priv->channel;
Expand Down Expand Up @@ -8401,10 +8438,11 @@ static int ipw_wx_set_freq(struct net_device *dev,
union iwreq_data *wrqu, char *extra)
{
struct ipw_priv *priv = ieee80211_priv(dev);
const struct ieee80211_geo *geo = ieee80211_get_geo(priv->ieee);
const struct ieee80211_geo *geo = ipw_get_geo(priv->ieee);
struct iw_freq *fwrq = &wrqu->freq;
int ret = 0, i;
u8 channel;
u8 channel, flags;
int band;

if (fwrq->m == 0) {
IPW_DEBUG_WX("SET Freq/Channel -> any\n");
Expand All @@ -8415,20 +8453,23 @@ static int ipw_wx_set_freq(struct net_device *dev,
}
/* if setting by freq convert to channel */
if (fwrq->e == 1) {
channel = ieee80211_freq_to_channel(priv->ieee, fwrq->m);
channel = ipw_freq_to_channel(priv->ieee, fwrq->m);
if (channel == 0)
return -EINVAL;
} else
channel = fwrq->m;

if (!ieee80211_is_valid_channel(priv->ieee, channel))
if (!(band = ipw_is_valid_channel(priv->ieee, channel)))
return -EINVAL;

if (priv->ieee->iw_mode == IW_MODE_ADHOC && priv->ieee->mode & IEEE_A) {
i = ieee80211_channel_to_index(priv->ieee, channel);
if (priv->ieee->iw_mode == IW_MODE_ADHOC) {
i = ipw_channel_to_index(priv->ieee, channel);
if (i == -1)
return -EINVAL;
if (geo->a[i].flags & IEEE80211_CH_PASSIVE_ONLY) {

flags = (band == IEEE80211_24GHZ_BAND) ?
geo->bg[i].flags : geo->a[i].flags;
if (flags & IEEE80211_CH_PASSIVE_ONLY) {
IPW_DEBUG_WX("Invalid Ad-Hoc channel for 802.11a\n");
return -EINVAL;
}
Expand Down Expand Up @@ -8546,7 +8587,7 @@ static int ipw_wx_get_range(struct net_device *dev,
{
struct ipw_priv *priv = ieee80211_priv(dev);
struct iw_range *range = (struct iw_range *)extra;
const struct ieee80211_geo *geo = ieee80211_get_geo(priv->ieee);
const struct ieee80211_geo *geo = ipw_get_geo(priv->ieee);
int i = 0, j;

wrqu->data.length = sizeof(*range);
Expand Down Expand Up @@ -9147,7 +9188,7 @@ static int ipw_request_direct_scan(struct ipw_priv *priv, char *essid,

scan.dwell_time[IPW_SCAN_ACTIVE_BROADCAST_AND_DIRECT_SCAN] =
cpu_to_le16(20);
scan.dwell_time[IPW_SCAN_PASSIVE_FULL_DWELL_SCAN] = cpu_to_le16(20);
scan.dwell_time[IPW_SCAN_PASSIVE_FULL_DWELL_SCAN] = cpu_to_le16(120);
scan.dwell_time[IPW_SCAN_ACTIVE_DIRECT_SCAN] = cpu_to_le16(20);

scan.full_scan_index = cpu_to_le32(ieee80211_get_scans(priv->ieee));
Expand Down Expand Up @@ -10775,6 +10816,96 @@ static const struct ieee80211_geo ipw_geos[] = {
}
};

/* GEO code borrowed from ieee80211_geo.c */
static int ipw_is_valid_channel(struct ieee80211_device *ieee, u8 channel)
{
int i;

/* Driver needs to initialize the geography map before using
* these helper functions */
BUG_ON(ieee->geo.bg_channels == 0 && ieee->geo.a_channels == 0);

if (ieee->freq_band & IEEE80211_24GHZ_BAND)
for (i = 0; i < ieee->geo.bg_channels; i++)
/* NOTE: If G mode is currently supported but
* this is a B only channel, we don't see it
* as valid. */
if ((ieee->geo.bg[i].channel == channel) &&
(!(ieee->mode & IEEE_G) ||
!(ieee->geo.bg[i].flags & IEEE80211_CH_B_ONLY)))
return IEEE80211_24GHZ_BAND;

if (ieee->freq_band & IEEE80211_52GHZ_BAND)
for (i = 0; i < ieee->geo.a_channels; i++)
if (ieee->geo.a[i].channel == channel)
return IEEE80211_52GHZ_BAND;

return 0;
}

static int ipw_channel_to_index(struct ieee80211_device *ieee, u8 channel)
{
int i;

/* Driver needs to initialize the geography map before using
* these helper functions */
BUG_ON(ieee->geo.bg_channels == 0 && ieee->geo.a_channels == 0);

if (ieee->freq_band & IEEE80211_24GHZ_BAND)
for (i = 0; i < ieee->geo.bg_channels; i++)
if (ieee->geo.bg[i].channel == channel)
return i;

if (ieee->freq_band & IEEE80211_52GHZ_BAND)
for (i = 0; i < ieee->geo.a_channels; i++)
if (ieee->geo.a[i].channel == channel)
return i;

return -1;
}

static u8 ipw_freq_to_channel(struct ieee80211_device *ieee, u32 freq)
{
int i;

/* Driver needs to initialize the geography map before using
* these helper functions */
BUG_ON(ieee->geo.bg_channels == 0 && ieee->geo.a_channels == 0);

freq /= 100000;

if (ieee->freq_band & IEEE80211_24GHZ_BAND)
for (i = 0; i < ieee->geo.bg_channels; i++)
if (ieee->geo.bg[i].freq == freq)
return ieee->geo.bg[i].channel;

if (ieee->freq_band & IEEE80211_52GHZ_BAND)
for (i = 0; i < ieee->geo.a_channels; i++)
if (ieee->geo.a[i].freq == freq)
return ieee->geo.a[i].channel;

return 0;
}

static int ipw_set_geo(struct ieee80211_device *ieee,
const struct ieee80211_geo *geo)
{
memcpy(ieee->geo.name, geo->name, 3);
ieee->geo.name[3] = '\0';
ieee->geo.bg_channels = geo->bg_channels;
ieee->geo.a_channels = geo->a_channels;
memcpy(ieee->geo.bg, geo->bg, geo->bg_channels *
sizeof(struct ieee80211_channel));
memcpy(ieee->geo.a, geo->a, ieee->geo.a_channels *
sizeof(struct ieee80211_channel));
return 0;
}

static const struct ieee80211_geo *ipw_get_geo(struct ieee80211_device *ieee)
{
return &ieee->geo;
}

#define MAX_HW_RESTARTS 5
static int ipw_up(struct ipw_priv *priv)
{
Expand Down Expand Up @@ -10816,7 +10947,7 @@ static int ipw_up(struct ipw_priv *priv)
}
if (j == ARRAY_SIZE(ipw_geos))
j = 0;
if (ieee80211_set_geo(priv->ieee, &ipw_geos[j])) {
if (ipw_set_geo(priv->ieee, &ipw_geos[j])) {
IPW_WARNING("Could not set geography.");
return 0;
}
Expand Down

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