Mesh Status TxMbps calculation consistency (#713)

* Fix the bandwidth reporting for ath10k devices
* Use 'iw' for all TxMbps reporting.
       As we cannot account for error rates in the ath10k driver, to be consistent
       we now use the same system to retrieve tx rates for both ath9k and ath10k.
* Remove unused rate tables

files/www/cgi-bin/mesh

@@ -47,48 +47,6 @@ require("iwinfo")
 
 local html = aredn.html
 
-local rateL = {
-	["1.0M"] = 1,   -- CCP LP
-	["2.0M"] = 2,   -- CCP LP
-	["5.5M"] = 5.5, -- CCP LP
-	MCS0 = 6.5, -- HT20 LGI
-	["11.0M"] = 11, -- CCP LP
-	MCS1 = 13,  -- HT20 LGI...
-	MCS2 = 19.5,
-	MCS3 = 26,
-	MCS4 = 39,
-	MCS5 = 52,
-	MCS6 = 58.5,
-	MCS7 = 65,
-	MCS8 = 13,
-	MCS9 = 26,
-	MCS10 = 39,
-	MCS11 = 52,
-	MCS12 = 78,
-	MCS13 = 104,
-	MCS14 = 117,
-	MCS15 = 130,
-    ["54.0M"] = 54
-}
-local rateS = {
-    MCS0 = 7.2,
-	MCS1 = 14.4,
-	MCS2 = 21.7,
-	MCS3 = 28.9,
-	MCS4 = 43.3,
-	MCS5 = 57.8,
-	MCS6 = 65,
-	MCS7 = 72.2,
-	MCS8 = 14.4,
-	MCS9 = 28.9,
-	MCS10 = 43.3,
-	MCS11 = 57.8,
-	MCS12 = 86.7,
-	MCS13 = 115.6,
-	MCS14 = 130,
-	MCS15 = 144.4
-}
-
 local node = aredn.info.get_nvram("node")
 if node == "" then
     node = "NOCALL"
@@ -230,31 +188,6 @@ do
     neighbor[node.remoteIP] = true
     local mac = arpcache[node.remoteIP]
     if mac then
-        local f = io.open(prefix .. mac["HW address"] .. "/rc_stats_csv", "r")
-        if f then
-            for line in f:lines()
-            do
-                local gi, rate, ewma = line:match("^[^,]*,([^,]*),[^,]*,A[^,]*,([^,%s]*)%s*,[^,]*,[^,]*,[^,]*,[^,]*,([^,]*),")
-                ewma = tonumber(ewma)
-                if gi and ewma then
-                    -- 802.11b/n
-                    if gi == "SGI" then
-                        links[node.remoteIP].mbps = string.format("%.1f", (rateS[rate] or 0) * ewma / 100 / chanbw)
-                    else
-                        links[node.remoteIP].mbps = string.format("%.1f", (rateL[rate] or 0) * ewma / 100 / chanbw)
-                    end
-                else
-                    rate, ewma = line:match("^A[^,]*,([^,]*),[^,]*,[^,]*,([^,]*,)")
-                    rate = tonumber(rate)
-                    ewma = tonumber(ewma)
-                    if rate and ewma then
-                        -- 802.11a/b/g
-                        links[node.remoteIP].mbps = string.format("%.1f", rate * ewma / 100 / chanbw)
-                    end
-                end
-            end
-            f:close()
-        else -- fallback (rates without error accounting)
         if not iwrates then
             iwrates = {}
             local station = {}
@@ -277,7 +210,6 @@ do
         end
     end
 end
-end
 
 -- discard
 arpcache = nil