wireless: consolidate on a single escape_essid implementation

Signed-off-by: John W. Linville <linville@tuxdriver.com>

3 files changed, 69 insertions, 0 deletions

diff --git a/net/wireless/Kconfig b/net/wireless/Kconfig
index 646c7121dbc0..ae7f2262dfb5 100644
--- a/net/wireless/Kconfig
+++ b/net/wireless/Kconfig
@@ -72,3 +72,13 @@ config WIRELESS_EXT_SYSFS
 
           Say Y if you have programs using it, like old versions of
           hal.
+
+config LIB80211
+        tristate "Common routines for IEEE802.11 drivers"
+        default n
+        help
+          This options enables a library of common routines used
+          by IEEE802.11 wireless LAN drivers.
+
+          Drivers should select this themselves if needed.  Say Y if
+          you want this built into your kernel.
diff --git a/net/wireless/Makefile b/net/wireless/Makefile
index b9f943c45f3b..d2d848d445f2 100644
--- a/net/wireless/Makefile
+++ b/net/wireless/Makefile
@@ -1,5 +1,6 @@
 obj-$(CONFIG_WIRELESS_EXT) += wext.o
 obj-$(CONFIG_CFG80211) += cfg80211.o
+obj-$(CONFIG_LIB80211) += lib80211.o
 
 cfg80211-y += core.o sysfs.o radiotap.o util.o reg.o
 cfg80211-$(CONFIG_NL80211) += nl80211.o
diff --git a/net/wireless/lib80211.c b/net/wireless/lib80211.c
new file mode 100644
index 000000000000..b22d271fb675
--- /dev/null
+++ b/net/wireless/lib80211.c
@@ -0,0 +1,58 @@
+/*
+ * lib80211 -- common bits for IEEE802.11 drivers
+ *
+ * Copyright(c) 2008 John W. Linville <linville@tuxdriver.com>
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/ieee80211.h>
+
+#include <net/lib80211.h>
+
+#define DRV_NAME        "lib80211"
+
+#define DRV_DESCRIPTION "common routines for IEEE802.11 drivers"
+
+MODULE_DESCRIPTION(DRV_DESCRIPTION);
+MODULE_AUTHOR("John W. Linville <linville@tuxdriver.com>");
+MODULE_LICENSE("GPL");
+
+const char *escape_ssid(const char *ssid, u8 ssid_len)
+{
+        static char escaped[IEEE80211_MAX_SSID_LEN * 2 + 1];
+        const char *s = ssid;
+        char *d = escaped;
+
+        if (is_empty_ssid(ssid, ssid_len)) {
+                memcpy(escaped, "<hidden>", sizeof("<hidden>"));
+                return escaped;
+        }
+
+        ssid_len = min_t(u8, ssid_len, IEEE80211_MAX_SSID_LEN);
+        while (ssid_len--) {
+                if (*s == '\0') {
+                        *d++ = '\\';
+                        *d++ = '0';
+                        s++;
+                } else {
+                        *d++ = *s++;
+                }
+        }
+        *d = '\0';
+        return escaped;
+}
+EXPORT_SYMBOL(escape_ssid);
+
+static int __init ieee80211_init(void)
+{
+        printk(KERN_INFO DRV_NAME ": " DRV_DESCRIPTION "\n");
+        return 0;
+}
+
+static void __exit ieee80211_exit(void)
+{
+}
+
+module_init(ieee80211_init);
+module_exit(ieee80211_exit);