From 22b1721823d705c7318d1eebafdfcdaead3025da Mon Sep 17 00:00:00 2001
From: Steven Barth <steven@midlink.org>
Date: Sat, 26 Apr 2008 17:14:22 +0000
Subject: * Added experimental version of DHCP-Splash for Kamikaze * Added
 MAC-Address matching to luci_fw * Added interface alias hack for Kamikaze *
 ffluci.sys: Added several networking helper functions * ffluci.http: Added
 function remote_addr * Updated Haserl to 0.9.24

---
 core/src/ffluci/http.lua |  6 ++++++
 core/src/ffluci/sys.lua  | 31 +++++++++++++++++++------------
 2 files changed, 25 insertions(+), 12 deletions(-)

(limited to 'core/src/ffluci')

diff --git a/core/src/ffluci/http.lua b/core/src/ffluci/http.lua
index 06e1c43bd..44d1a925c 100644
--- a/core/src/ffluci/http.lua
+++ b/core/src/ffluci/http.lua
@@ -59,6 +59,12 @@ function request_redirect(category, module, action, ...)
 end
 
 
+-- Returns the User's IP
+function remote_addr()
+	return ENV.REMOTE_ADDR
+end
+
+
 -- Returns the script name
 function script_name()
 	return ENV.SCRIPT_NAME
diff --git a/core/src/ffluci/sys.lua b/core/src/ffluci/sys.lua
index 44855f8ef..77d45cfb7 100644
--- a/core/src/ffluci/sys.lua
+++ b/core/src/ffluci/sys.lua
@@ -115,18 +115,14 @@ group = {}
 group.getgroup = posix.getgroup
 
 net = {}
+-- Returns the ARP-Table
+function net.arptable()
+	return _parse_delimited_table(io.lines("/proc/net/arp"), "%s%s+")
+end
+
 -- Returns whether an IP-Adress belongs to a certain net
-function net.belongs(ip, net)
-	local netparts = ffluci.util.split(net, "/")
-	
-	if #netparts ~= 2 then
-		return nil
-	end
-	
-	local binadr = net.ip4bin(ip)
-	local binnet = net.ip4bin(netparts[1])
-	
-	return (binadr:sub(1, netparts[2]) == binnet:sub(1, netparts[2]))
+function net.belongs(ip, net, prefix)
+	return (net.ip4bin(ip):sub(1, prefix) == net.ip4bin(net):sub(1, prefix))
 end
 
 -- Returns all available network interfaces
@@ -138,6 +134,17 @@ function net.devices()
 	return devices
 end
 
+-- Returns the prefix to a given netmask
+function net.mask4prefix(mask)
+	local bin = net.ip4bin(mask)
+	
+	if not bin then
+		return nil
+	end
+	
+	return #ffluci.util.split(bin, "1")-1
+end
+
 -- Returns the kernel routing table
 function net.routes()
 	return _parse_delimited_table(io.lines("/proc/net/route"))
@@ -267,7 +274,7 @@ end
 -- Internal functions
 
 function _parse_delimited_table(iter, delimiter)
-	delimiter = delimiter or "\t+"
+	delimiter = delimiter or "%s+"
 	
 	local data  = {}
 	local trim  = ffluci.util.trim
-- 
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