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libs/sys: add ip6tables support to luci.sys.iptparser

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This commit is contained in:
Jo-Philipp Wich 2011-01-29 18:34:00 +00:00
parent 825329ed41
commit b477dae307
1 changed files with 38 additions and 16 deletions
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54
libs/sys/luasrc/sys/iptparser.lua
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@ -28,12 +28,25 @@ module("luci.sys.iptparser")
--- Create a new iptables parser object.
-- @class function
-- @name IptParser
-- @param family Number specifying the address family. 4 for IPv4, 6 for IPv6
-- @return IptParser instance
IptParser = luci.util.class()
function IptParser.__init__( self, ... )
function IptParser.__init__( self, family )
self._family = (tonumber(family) == 6) and 6 or 4
self._rules = { }
self._chains = { }
if self._family == 4 then
self._nulladdr = "0.0.0.0/0"
self._tables = { "filter", "nat", "mangle", "raw" }
self._command = "iptables -t %s --line-numbers -nxvL"
else
self._nulladdr = "::/0"
self._tables = { "filter", "mangle", "raw" }
self._command = "ip6tables -t %s --line-numbers -nxvL"
end
self:_parse_rules()
end
@ -49,9 +62,9 @@ end
-- <li> protocol - Match rules that match the given protocol, rules with
-- protocol "all" are always matched
-- <li> source - Match rules with the given source, rules with source
-- "0.0.0.0/0" are always matched
-- "0.0.0.0/0" (::/0) are always matched
-- <li> destination - Match rules with the given destination, rules with
-- destination "0.0.0.0/0" are always matched
-- destination "0.0.0.0/0" (::/0) are always matched
-- <li> inputif - Match rules with the given input interface, rules
-- with input interface "*" (=all) are always matched
-- <li> outputif - Match rules with the given output interface, rules
@ -76,8 +89,8 @@ end
-- or "*" for all interfaces
-- <li> outputif - Output interface of the rule,e.g. "eth0.0"
-- or "*" for all interfaces
-- <li> source - The source ip range, e.g. "0.0.0.0/0"
-- <li> destination - The destination ip range, e.g. "0.0.0.0/0"
-- <li> source - The source ip range, e.g. "0.0.0.0/0" (::/0)
-- <li> destination - The destination ip range, e.g. "0.0.0.0/0" (::/0)
-- <li> options - A list of specific options of the rule,
-- e.g. { "reject-with", "tcp-reset" }
-- <li> packets - The number of packets matched by the rule
@ -102,8 +115,8 @@ function IptParser.find( self, args )
local args = args or { }
local rv = { }
args.source = args.source and luci.ip.IPv4(args.source)
args.destination = args.destination and luci.ip.IPv4(args.destination)
args.source = args.source and self:_parse_addr(args.source)
args.destination = args.destination and self:_parse_addr(args.destination)
for i, rule in ipairs(self._rules) do
local match = true
@ -137,16 +150,16 @@ function IptParser.find( self, args )
-- match source
if not ( match == true and (
not args.source or rule.source == "0.0.0.0/0" or
luci.ip.IPv4(rule.source):contains(args.source)
not args.source or rule.source == self._nulladdr or
self:_parse_addr(rule.source):contains(args.source)
) ) then
match = false
end
-- match destination
if not ( match == true and (
not args.destination or rule.destination == "0.0.0.0/0" or
luci.ip.IPv4(rule.destination):contains(args.destination)
not args.destination or rule.destination == self._nulladdr or
self:_parse_addr(rule.destination):contains(args.destination)
) ) then
match = false
end
@ -241,26 +254,35 @@ function IptParser.is_custom_target( self, target )
end
-- [internal] Parse address according to family.
function IptParser._parse_addr( self, addr )
if self._family == 4 then
return luci.ip.IPv4(addr)
else
return luci.ip.IPv6(addr)
end
end
-- [internal] Parse iptables output from all tables.
function IptParser._parse_rules( self )
for i, tbl in ipairs({ "filter", "nat", "mangle" }) do
for i, tbl in ipairs(self._tables) do
self._chains[tbl] = { }
for i, rule in ipairs(luci.util.execl("iptables -t " .. tbl .. " --line-numbers -nxvL")) do
for i, rule in ipairs(luci.util.execl(self._command % tbl)) do
if rule:find( "Chain " ) == 1 then
if rule:find( "^Chain " ) == 1 then
local crefs
local cname, cpol, cpkt, cbytes = rule:match(
"Chain ([^%s]*) %(policy (%w+) " ..
"^Chain ([^%s]*) %(policy (%w+) " ..
"(%d+) packets, (%d+) bytes%)"
)
if not cname then
cname, crefs = rule:match(
"Chain ([^%s]*) %((%d+) references%)"
"^Chain ([^%s]*) %((%d+) references%)"
)
end