luci-app-mwan3: calculate max interface usage from mmx_mask value

Show max interface value on interface page dependent on the mmx_mask
value

Signed-off-by: Florian Eckert <fe@dev.tdt.de>

diff --git a/applications/luci-app-mwan3/luasrc/model/cbi/mwan/interface.lua b/applications/luci-app-mwan3/luasrc/model/cbi/mwan/interface.lua
index 14bf138..556a4f7 100644 (file)
--- a/applications/luci-app-mwan3/luasrc/model/cbi/mwan/interface.lua
+++ b/applications/luci-app-mwan3/luasrc/model/cbi/mwan/interface.lua
@@ -5,15 +5,15 @@
 dsp = require "luci.dispatcher"
 
 
-function interfaceWarnings(overview, count)
+function interfaceWarnings(overview, count, iface_max)
        local warnings = ""
-       if count <= 250 then
+       if count <= iface_max then
                warnings = string.format("<strong>%s</strong><br />",
-                       translatef("There are currently %d of 250 supported interfaces configured", count)
+                       translatef("There are currently %d of %d supported interfaces configured", count, iface_max)
                        )
        else
                warnings = string.format("<strong>%s</strong><br />",
-                       translatef("WARNING: %d interfaces are configured exceeding the maximum of 250!", count)
+                       translatef("WARNING: %d interfaces are configured exceeding the maximum of %d!", count, iface_max)
                        )
        end
 
@@ -103,7 +103,34 @@ function configCheck()
                        end
                end
        )
-       return overview, count
+
+       -- calculate iface_max usage from firewall mmx_mask
+       function bit(p)
+               return 2 ^ (p - 1)
+       end
+       function hasbit(x, p)
+               return x % (p + p) >= p
+       end
+       function setbit(x, p)
+               return hasbit(x, p) and x or x + p
+       end
+
+       local uci = require("uci").cursor(nil, "/var/state")
+       local mmx_mask = uci:get("mwan3", "globals", "mmx_mask") or "0x3F00"
+       local number = tonumber(mmx_mask, 16)
+       local bits = 0
+       local iface_max = 0
+       for i=1,16 do
+               if hasbit(number, bit(i)) then
+                       bits = bits + 1
+                       iface_max = setbit( iface_max, bit(bits))
+               end
+       end
+
+       -- subtract blackhole, unreachable and default table from iface_max
+       iface_max = iface_max - 3
+
+       return overview, count, iface_max
 end
 
 m5 = Map("mwan3", translate("MWAN - Interfaces"),