From 2a9a87e89172c147c1dc222f67221f825755e9aa Mon Sep 17 00:00:00 2001
From: Jo-Philipp Wich <jow@openwrt.org>
Date: Sun, 9 Aug 2009 14:24:43 +0000
Subject: [PATCH] libs/iwinfo: implement *_get_frequency() - operating freq in
 mhz

---
 libs/iwinfo/src/iwinfo_lualib.c  |  6 ++++
 libs/iwinfo/src/iwinfo_madwifi.c | 13 ++++++++
 libs/iwinfo/src/iwinfo_madwifi.h |  1 +
 libs/iwinfo/src/iwinfo_wext.c    | 56 ++++++++++++++++++++++++++++++++
 libs/iwinfo/src/iwinfo_wext.h    | 17 ++--------
 libs/iwinfo/src/iwinfo_wl.c      |  5 +++
 libs/iwinfo/src/iwinfo_wl.h      |  1 +
 7 files changed, 84 insertions(+), 15 deletions(-)

diff --git a/libs/iwinfo/src/iwinfo_lualib.c b/libs/iwinfo/src/iwinfo_lualib.c
index 4663d3414..0b007c6af 100644
--- a/libs/iwinfo/src/iwinfo_lualib.c
+++ b/libs/iwinfo/src/iwinfo_lualib.c
@@ -77,6 +77,7 @@ int iwinfo_L_assoclist(lua_State *L, int (*func)(const char *, char *, int *))
 
 /* Broadcom */
 LUA_WRAP_INT(wl,channel)
+LUA_WRAP_INT(wl,frequency)
 LUA_WRAP_INT(wl,bitrate)
 LUA_WRAP_INT(wl,signal)
 LUA_WRAP_INT(wl,noise)
@@ -90,6 +91,7 @@ LUA_WRAP_ASSOCLIST(wl)
 
 /* Madwifi */
 LUA_WRAP_INT(madwifi,channel)
+LUA_WRAP_INT(madwifi,frequency)
 LUA_WRAP_INT(madwifi,bitrate)
 LUA_WRAP_INT(madwifi,signal)
 LUA_WRAP_INT(madwifi,noise)
@@ -103,6 +105,7 @@ LUA_WRAP_ASSOCLIST(madwifi)
 
 /* Wext */
 LUA_WRAP_INT(wext,channel)
+LUA_WRAP_INT(wext,frequency)
 LUA_WRAP_INT(wext,bitrate)
 LUA_WRAP_INT(wext,signal)
 LUA_WRAP_INT(wext,noise)
@@ -117,6 +120,7 @@ LUA_WRAP_ASSOCLIST(wext)
 /* Broadcom table */
 static const luaL_reg R_wl[] = {
 	LUA_REG(wl,channel),
+	LUA_REG(wl,frequency),
 	LUA_REG(wl,bitrate),
 	LUA_REG(wl,signal),
 	LUA_REG(wl,noise),
@@ -133,6 +137,7 @@ static const luaL_reg R_wl[] = {
 /* Madwifi table */
 static const luaL_reg R_madwifi[] = {
 	LUA_REG(madwifi,channel),
+	LUA_REG(madwifi,frequency),
 	LUA_REG(madwifi,bitrate),
 	LUA_REG(madwifi,signal),
 	LUA_REG(madwifi,noise),
@@ -149,6 +154,7 @@ static const luaL_reg R_madwifi[] = {
 /* Wext table */
 static const luaL_reg R_wext[] = {
 	LUA_REG(wext,channel),
+	LUA_REG(wext,frequency),
 	LUA_REG(wext,bitrate),
 	LUA_REG(wext,signal),
 	LUA_REG(wext,noise),
diff --git a/libs/iwinfo/src/iwinfo_madwifi.c b/libs/iwinfo/src/iwinfo_madwifi.c
index 85b5857c7..7869b34c7 100644
--- a/libs/iwinfo/src/iwinfo_madwifi.c
+++ b/libs/iwinfo/src/iwinfo_madwifi.c
@@ -127,6 +127,19 @@ int madwifi_get_channel(const char *ifname, int *buf)
 	return -1;
 }
 
+int madwifi_get_frequency(const char *ifname, int *buf)
+{
+	struct iwreq wrq;
+
+	if( madwifi_ioctl(&wrq, ifname, SIOCGIWFREQ, NULL, 0) >= 0 )
+	{
+		*buf = (uint16_t)(wrq.u.freq.m / 100000);
+		return 0;
+	}
+
+	return -1;
+}
+
 int madwifi_get_bitrate(const char *ifname, int *buf)
 {
 	unsigned int mode, len, rate, rate_count;
diff --git a/libs/iwinfo/src/iwinfo_madwifi.h b/libs/iwinfo/src/iwinfo_madwifi.h
index 4b0472ef1..57a273c0d 100644
--- a/libs/iwinfo/src/iwinfo_madwifi.h
+++ b/libs/iwinfo/src/iwinfo_madwifi.h
@@ -27,6 +27,7 @@ int madwifi_get_mode(const char *ifname, char *buf);
 int madwifi_get_ssid(const char *ifname, char *buf);
 int madwifi_get_bssid(const char *ifname, char *buf);
 int madwifi_get_channel(const char *ifname, int *buf);
+int madwifi_get_frequency(const char *ifname, int *buf);
 int madwifi_get_bitrate(const char *ifname, int *buf);
 int madwifi_get_signal(const char *ifname, int *buf);
 int madwifi_get_noise(const char *ifname, int *buf);
diff --git a/libs/iwinfo/src/iwinfo_wext.c b/libs/iwinfo/src/iwinfo_wext.c
index 7f44fd0d2..76062ba0a 100644
--- a/libs/iwinfo/src/iwinfo_wext.c
+++ b/libs/iwinfo/src/iwinfo_wext.c
@@ -32,6 +32,24 @@ static double wext_freq2float(const struct iw_freq *in)
 	return res;
 }
 
+static int wext_freq2mhz(const struct iw_freq *in)
+{
+	int i, mhz;
+
+	if( in->e == 6 )
+	{
+		return in->m;
+	}
+	else
+	{
+		mhz = in->m;
+		for(i = 0; i < in->e; i++)
+			mhz *= 10;
+
+		return (int)(mhz / 100000);
+	}
+}
+
 static int wext_ioctl(const char *ifname, int cmd, struct iwreq *wrq)
 {
 	/* prepare socket */
@@ -157,6 +175,44 @@ int wext_get_channel(const char *ifname, int *buf)
 	return -1;	
 }
 
+int wext_get_frequency(const char *ifname, int *buf)
+{
+	struct iwreq wrq;
+	struct iw_range range;
+	int i, channel;
+
+	if(wext_ioctl(ifname, SIOCGIWFREQ, &wrq) >= 0)
+	{
+		/* We got a channel number instead ... */
+		if( wrq.u.freq.m < 1000 )
+		{
+			channel = wrq.u.freq.m;
+			wrq.u.data.pointer = (caddr_t) &range;
+			wrq.u.data.length  = sizeof(struct iw_range);
+			wrq.u.data.flags   = 0;
+
+			if(wext_ioctl(ifname, SIOCGIWRANGE, &wrq) >= 0)
+			{
+				for(i = 0; i < range.num_frequency; i++)
+				{
+					if( range.freq[i].i == channel )
+					{
+						*buf = wext_freq2mhz(&range.freq[i]);
+						return 0;
+					}
+				}
+			}
+		}
+		else
+		{
+			*buf = wext_freq2mhz(&wrq.u.freq);
+			return 0;
+		}
+	}
+
+	return -1;	
+}
+
 int wext_get_signal(const char *ifname, int *buf)
 {
 	struct iwreq wrq;
diff --git a/libs/iwinfo/src/iwinfo_wext.h b/libs/iwinfo/src/iwinfo_wext.h
index d4914ff2e..bd0a66f1e 100644
--- a/libs/iwinfo/src/iwinfo_wext.h
+++ b/libs/iwinfo/src/iwinfo_wext.h
@@ -19,21 +19,7 @@
 #ifndef __IWINFO_WEXT_H_
 #define __IWINFO_WEXT_H_
 
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <unistd.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <fcntl.h>
-#include <glob.h>
-#include <ctype.h>
-#include <stdint.h>
-
-#include <sys/ioctl.h>
-#include <net/if.h>
-#include <errno.h>
-
+#include "iwinfo.h"
 #include "include/wext.h"
 
 int wext_probe(const char *ifname);
@@ -41,6 +27,7 @@ int wext_get_mode(const char *ifname, char *buf);
 int wext_get_ssid(const char *ifname, char *buf);
 int wext_get_bssid(const char *ifname, char *buf);
 int wext_get_channel(const char *ifname, int *buf);
+int wext_get_frequency(const char *ifname, int *buf);
 int wext_get_bitrate(const char *ifname, int *buf);
 int wext_get_signal(const char *ifname, int *buf);
 int wext_get_noise(const char *ifname, int *buf);
diff --git a/libs/iwinfo/src/iwinfo_wl.c b/libs/iwinfo/src/iwinfo_wl.c
index 336247501..a29cf84ee 100644
--- a/libs/iwinfo/src/iwinfo_wl.c
+++ b/libs/iwinfo/src/iwinfo_wl.c
@@ -128,6 +128,11 @@ int wl_get_channel(const char *ifname, int *buf)
 	return wl_ioctl(ifname, WLC_GET_CHANNEL, buf, sizeof(buf));
 }
 
+int wl_get_frequency(const char *ifname, int *buf)
+{
+	return wext_get_frequency(ifname, buf);
+}
+
 int wl_get_bitrate(const char *ifname, int *buf)
 {
 	int ret = -1;
diff --git a/libs/iwinfo/src/iwinfo_wl.h b/libs/iwinfo/src/iwinfo_wl.h
index 77d8d8f0f..5df893994 100644
--- a/libs/iwinfo/src/iwinfo_wl.h
+++ b/libs/iwinfo/src/iwinfo_wl.h
@@ -27,6 +27,7 @@ int wl_get_mode(const char *ifname, char *buf);
 int wl_get_ssid(const char *ifname, char *buf);
 int wl_get_bssid(const char *ifname, char *buf);
 int wl_get_channel(const char *ifname, int *buf);
+int wl_get_frequency(const char *ifname, int *buf);
 int wl_get_bitrate(const char *ifname, int *buf);
 int wl_get_signal(const char *ifname, int *buf);
 int wl_get_noise(const char *ifname, int *buf);
-- 
2.25.1