wireless: consolidate on a single escape_essid implementation

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

7 files changed, 89 insertions, 44 deletions

diff --git a/net/ieee80211/Kconfig b/net/ieee80211/Kconfig
index df9624c3ceb..d2282bb2e4f 100644
--- a/net/ieee80211/Kconfig
+++ b/net/ieee80211/Kconfig
@@ -11,6 +11,7 @@ config IEEE80211
 	select IEEE80211_CRYPT_WEP
 	select IEEE80211_CRYPT_TKIP
 	select IEEE80211_CRYPT_CCMP
+	select LIB80211
 	---help---
 	This option enables the hardware independent IEEE 802.11
 	networking stack.  This component is deprecated in favor of the
diff --git a/net/ieee80211/ieee80211_module.c b/net/ieee80211/ieee80211_module.c
index 949772a5a7d..d34d4e79b6f 100644
--- a/net/ieee80211/ieee80211_module.c
+++ b/net/ieee80211/ieee80211_module.c
@@ -308,31 +308,5 @@ MODULE_PARM_DESC(debug, "debug output mask");
 module_exit(ieee80211_exit);
 module_init(ieee80211_init);
 
-const char *escape_essid(const char *essid, u8 essid_len)
-{
-	static char escaped[IW_ESSID_MAX_SIZE * 2 + 1];
-	const char *s = essid;
-	char *d = escaped;
-
-	if (ieee80211_is_empty_essid(essid, essid_len)) {
-		memcpy(escaped, "<hidden>", sizeof("<hidden>"));
-		return escaped;
-	}
-
-	essid_len = min(essid_len, (u8) IW_ESSID_MAX_SIZE);
-	while (essid_len--) {
-		if (*s == '\0') {
-			*d++ = '\\';
-			*d++ = '0';
-			s++;
-		} else {
-			*d++ = *s++;
-		}
-	}
-	*d = '\0';
-	return escaped;
-}
-
 EXPORT_SYMBOL(alloc_ieee80211);
 EXPORT_SYMBOL(free_ieee80211);
-EXPORT_SYMBOL(escape_essid);
diff --git a/net/ieee80211/ieee80211_rx.c b/net/ieee80211/ieee80211_rx.c
index 281223e41c5..876a004918b 100644
--- a/net/ieee80211/ieee80211_rx.c
+++ b/net/ieee80211/ieee80211_rx.c
@@ -32,6 +32,7 @@
 #include <asm/uaccess.h>
 #include <linux/ctype.h>
 
+#include <net/lib80211.h>
 #include <net/ieee80211.h>
 
 static void ieee80211_monitor_rx(struct ieee80211_device *ieee,
@@ -1145,8 +1146,8 @@ static int ieee80211_parse_info_param(struct ieee80211_info_element
 
 		switch (info_element->id) {
 		case MFIE_TYPE_SSID:
-			if (ieee80211_is_empty_essid(info_element->data,
-						     info_element->len)) {
+			if (is_empty_ssid(info_element->data,
+					  info_element->len)) {
 				network->flags |= NETWORK_EMPTY_ESSID;
 				break;
 			}
@@ -1390,7 +1391,7 @@ static int ieee80211_handle_assoc_resp(struct ieee80211_device *ieee, struct iee
 			network->mode |= IEEE_B;
 	}
 
-	if (ieee80211_is_empty_essid(network->ssid, network->ssid_len))
+	if (is_empty_ssid(network->ssid, network->ssid_len))
 		network->flags |= NETWORK_EMPTY_ESSID;
 
 	memcpy(&network->stats, stats, sizeof(network->stats));
@@ -1456,13 +1457,13 @@ static int ieee80211_network_init(struct ieee80211_device *ieee, struct ieee8021
 	if (network->mode == 0) {
 		IEEE80211_DEBUG_SCAN("Filtered out '%s (%pM)' "
 				     "network.\n",
-				     escape_essid(network->ssid,
-						  network->ssid_len),
+				     escape_ssid(network->ssid,
+						 network->ssid_len),
 				     network->bssid);
 		return 1;
 	}
 
-	if (ieee80211_is_empty_essid(network->ssid, network->ssid_len))
+	if (is_empty_ssid(network->ssid, network->ssid_len))
 		network->flags |= NETWORK_EMPTY_ESSID;
 
 	memcpy(&network->stats, stats, sizeof(network->stats));
@@ -1576,7 +1577,7 @@ static void ieee80211_process_probe_response(struct ieee80211_device
 
 	IEEE80211_DEBUG_SCAN("'%s' (%pM"
 		     "): %c%c%c%c %c%c%c%c-%c%c%c%c %c%c%c%c\n",
-		     escape_essid(info_element->data, info_element->len),
+		     escape_ssid(info_element->data, info_element->len),
 		     beacon->header.addr3,
 		     (beacon->capability & cpu_to_le16(1 << 0xf)) ? '1' : '0',
 		     (beacon->capability & cpu_to_le16(1 << 0xe)) ? '1' : '0',
@@ -1597,8 +1598,8 @@ static void ieee80211_process_probe_response(struct ieee80211_device
 
 	if (ieee80211_network_init(ieee, beacon, &network, stats)) {
 		IEEE80211_DEBUG_SCAN("Dropped '%s' (%pM) via %s.\n",
-				     escape_essid(info_element->data,
-						  info_element->len),
+				     escape_ssid(info_element->data,
+						 info_element->len),
 				     beacon->header.addr3,
 				     is_beacon(beacon->header.frame_ctl) ?
 				     "BEACON" : "PROBE RESPONSE");
@@ -1635,8 +1636,8 @@ static void ieee80211_process_probe_response(struct ieee80211_device
 			target = oldest;
 			IEEE80211_DEBUG_SCAN("Expired '%s' (%pM) from "
 					     "network list.\n",
-					     escape_essid(target->ssid,
-							  target->ssid_len),
+					     escape_ssid(target->ssid,
+							 target->ssid_len),
 					     target->bssid);
 			ieee80211_network_reset(target);
 		} else {
@@ -1648,8 +1649,8 @@ static void ieee80211_process_probe_response(struct ieee80211_device
 
 #ifdef CONFIG_IEEE80211_DEBUG
 		IEEE80211_DEBUG_SCAN("Adding '%s' (%pM) via %s.\n",
-				     escape_essid(network.ssid,
-						  network.ssid_len),
+				     escape_ssid(network.ssid,
+						 network.ssid_len),
 				     network.bssid,
 				     is_beacon(beacon->header.frame_ctl) ?
 				     "BEACON" : "PROBE RESPONSE");
@@ -1659,8 +1660,8 @@ static void ieee80211_process_probe_response(struct ieee80211_device
 		list_add_tail(&target->list, &ieee->network_list);
 	} else {
 		IEEE80211_DEBUG_SCAN("Updating '%s' (%pM) via %s.\n",
-				     escape_essid(target->ssid,
-						  target->ssid_len),
+				     escape_ssid(target->ssid,
+						 target->ssid_len),
 				     target->bssid,
 				     is_beacon(beacon->header.frame_ctl) ?
 				     "BEACON" : "PROBE RESPONSE");
diff --git a/net/ieee80211/ieee80211_wx.c b/net/ieee80211/ieee80211_wx.c
index 89a81062ab4..3b031c2910a 100644
--- a/net/ieee80211/ieee80211_wx.c
+++ b/net/ieee80211/ieee80211_wx.c
@@ -283,8 +283,8 @@ int ieee80211_wx_get_scan(struct ieee80211_device *ieee,
 		else
 			IEEE80211_DEBUG_SCAN("Not showing network '%s ("
 					     "%pM)' due to age (%dms).\n",
-					     escape_essid(network->ssid,
-							  network->ssid_len),
+					     escape_ssid(network->ssid,
+							 network->ssid_len),
 					     network->bssid,
 					     jiffies_to_msecs(jiffies -
 							      network->
@@ -408,7 +408,7 @@ int ieee80211_wx_set_encode(struct ieee80211_device *ieee,
 			memset(sec.keys[key] + erq->length, 0,
 			       len - erq->length);
 		IEEE80211_DEBUG_WX("Setting key %d to '%s' (%d:%d bytes)\n",
-				   key, escape_essid(sec.keys[key], len),
+				   key, escape_ssid(sec.keys[key], len),
 				   erq->length, len);
 		sec.key_sizes[key] = len;
 		if (*crypt)
diff --git a/net/wireless/Kconfig b/net/wireless/Kconfig
index 646c7121dbc..ae7f2262dfb 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 b9f943c45f3..d2d848d445f 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 00000000000..b22d271fb67
--- /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);