* Added initial version of RPC info API

[project/luci.git] / core / src / ffluci / sys.lua

diff --git a/core/src/ffluci/sys.lua b/core/src/ffluci/sys.lua
index 8aa77cf..d71bce7 100644 (file)
--- a/core/src/ffluci/sys.lua
+++ b/core/src/ffluci/sys.lua
@@ -29,6 +29,13 @@ require("posix")
 require("ffluci.bits")
 require("ffluci.util")
 
+-- Returns whether a system is bigendian
+function bigendian()
+       local fp = io.open("/bin/sh")
+       fp:seek("set", 5)
+       return (fp:read(1):byte() ~= 1)
+end
+
 -- Runs "command" and returns its output
 function exec(command)
        local pp   = io.popen(command)
@@ -125,6 +132,20 @@ function net.belongs(ip, ipnet, prefix)
        return (net.ip4bin(ip):sub(1, prefix) == net.ip4bin(ipnet):sub(1, prefix))
 end
 
+-- Detect the default route
+function net.defaultroute()
+       local routes = net.routes()
+       local route = nil
+       
+       for i, r in pairs(ffluci.sys.net.routes()) do
+               if r.Destination == "00000000" and (not route or route.Metric > r.Metric) then
+                       route = r
+               end
+       end
+       
+       return route
+end
+
 -- Returns all available network interfaces
 function net.devices()
        local devices = {}
@@ -163,16 +184,18 @@ function net.routes()
        return _parse_delimited_table(io.lines("/proc/net/route"))
 end
 
--- Returns the numeric IP to a given hexstring (little endian)
-function net.hexip4(hex, bigendian)
+-- Returns the numeric IP to a given hexstring
+function net.hexip4(hex, be)
        if #hex ~= 8 then
                return nil
        end
        
+       be = be or bigendian()
+       
        local hexdec = ffluci.bits.Hex2Dec
        
        local ip = ""
-       if bigendian then
+       if be then
                ip = ip .. tostring(hexdec(hex:sub(1,2))) .. "."
                ip = ip .. tostring(hexdec(hex:sub(3,4))) .. "."
                ip = ip .. tostring(hexdec(hex:sub(5,6))) .. "."