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[Ieee80211-devel] [PATCH 22/29] ieee80211 Added ieee80211_geo to provide helper functions for channel maps
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From: James K. <jke...@li...> - 2005-09-13 23:33:02
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Added ieee80211_geo to provide helper functions to drivers for
implementing supported channel maps.
Signed-off-by: James Ketrenos <jke...@li...>
---
include/net/ieee80211.h | 42 ++++++++++++
net/ieee80211/Makefile | 3 +
net/ieee80211/ieee80211_geo.c | 141 +++++++++++++++++++++++++++++++++++++++++
3 files changed, 185 insertions(+), 1 deletions(-)
create mode 100644 net/ieee80211/ieee80211_geo.c
d814c2adddf430e3b97f0dbc9ce6dd5565af1f0f
diff --git a/include/net/ieee80211.h b/include/net/ieee80211.h
--- a/include/net/ieee80211.h
+++ b/include/net/ieee80211.h
@@ -787,6 +787,34 @@ enum ieee80211_state {
#define CFG_IEEE80211_COMPUTE_FCS (1<<1)
#define CFG_IEEE80211_RTS (1<<2)
+#define IEEE80211_24GHZ_MIN_CHANNEL 1
+#define IEEE80211_24GHZ_MAX_CHANNEL 14
+#define IEEE80211_24GHZ_CHANNELS 14
+
+#define IEEE80211_52GHZ_MIN_CHANNEL 36
+#define IEEE80211_52GHZ_MAX_CHANNEL 165
+#define IEEE80211_52GHZ_CHANNELS 32
+
+enum {
+ IEEE80211_CH_PASSIVE_ONLY = (1 << 0),
+ IEEE80211_CH_B_ONLY = (1 << 2),
+};
+
+struct ieee80211_channel {
+ u16 freq;
+ u8 channel;
+ u8 flags;
+ u8 max_power;
+};
+
+struct ieee80211_geo {
+ u8 name[4];
+ u8 bg_channels;
+ u8 a_channels;
+ struct ieee80211_channel bg[IEEE80211_24GHZ_CHANNELS];
+ struct ieee80211_channel a[IEEE80211_52GHZ_CHANNELS];
+};
+
struct ieee80211_device {
struct net_device *dev;
struct ieee80211_security sec;
@@ -795,6 +823,8 @@ struct ieee80211_device {
struct net_device_stats stats;
struct ieee80211_stats ieee_stats;
+ struct ieee80211_geo geo;
+
/* Probe / Beacon management */
struct list_head network_free_list;
struct list_head network_list;
@@ -1011,6 +1041,18 @@ extern void ieee80211_rx_mgt(struct ieee
struct ieee80211_hdr_4addr *header,
struct ieee80211_rx_stats *stats);
+/* ieee80211_geo.c */
+extern const struct ieee80211_geo *ieee80211_get_geo(struct ieee80211_device
+ *ieee);
+extern int ieee80211_set_geo(struct ieee80211_device *ieee,
+ const struct ieee80211_geo *geo);
+
+extern int ieee80211_is_valid_channel(struct ieee80211_device *ieee,
+ u8 channel);
+extern int ieee80211_channel_to_index(struct ieee80211_device *ieee,
+ u8 channel);
+extern u8 ieee80211_freq_to_channel(struct ieee80211_device *ieee, u32 freq);
+
/* ieee80211_wx.c */
extern int ieee80211_wx_get_scan(struct ieee80211_device *ieee,
struct iw_request_info *info,
diff --git a/net/ieee80211/Makefile b/net/ieee80211/Makefile
--- a/net/ieee80211/Makefile
+++ b/net/ieee80211/Makefile
@@ -7,5 +7,6 @@ ieee80211-objs := \
ieee80211_module.o \
ieee80211_tx.o \
ieee80211_rx.o \
- ieee80211_wx.o
+ ieee80211_wx.o \
+ ieee80211_geo.o
diff --git a/net/ieee80211/ieee80211_geo.c b/net/ieee80211/ieee80211_geo.c
new file mode 100644
--- /dev/null
+++ b/net/ieee80211/ieee80211_geo.c
@@ -0,0 +1,141 @@
+/******************************************************************************
+
+ Copyright(c) 2005 Intel Corporation. All rights reserved.
+
+ This program is free software; you can redistribute it and/or modify it
+ under the terms of version 2 of the GNU General Public License as
+ published by the Free Software Foundation.
+
+ 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., 59
+ Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+
+ The full GNU General Public License is included in this distribution in the
+ file called LICENSE.
+
+ Contact Information:
+ James P. Ketrenos <ipw...@li...>
+ Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
+
+******************************************************************************/
+#include <linux/compiler.h>
+#include <linux/config.h>
+#include <linux/errno.h>
+#include <linux/if_arp.h>
+#include <linux/in6.h>
+#include <linux/in.h>
+#include <linux/ip.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/netdevice.h>
+#include <linux/proc_fs.h>
+#include <linux/skbuff.h>
+#include <linux/slab.h>
+#include <linux/tcp.h>
+#include <linux/types.h>
+#include <linux/version.h>
+#include <linux/wireless.h>
+#include <linux/etherdevice.h>
+#include <asm/uaccess.h>
+
+#include <net/ieee80211.h>
+
+int ieee80211_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;
+}
+
+int ieee80211_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;
+}
+
+u8 ieee80211_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;
+}
+
+int ieee80211_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;
+}
+
+const struct ieee80211_geo *ieee80211_get_geo(struct ieee80211_device *ieee)
+{
+ return &ieee->geo;
+}
+
+EXPORT_SYMBOL(ieee80211_is_valid_channel);
+EXPORT_SYMBOL(ieee80211_freq_to_channel);
+EXPORT_SYMBOL(ieee80211_channel_to_index);
+EXPORT_SYMBOL(ieee80211_set_geo);
+EXPORT_SYMBOL(ieee80211_get_geo);
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