include $(TOPDIR)/rules.mk
LUCI_TITLE:=Freifunk DHCP-Splash application
-LUCI_DEPENDS:=+luci-lib-nixio +tc +kmod-sched +iptables-mod-nat-extra +iptables-mod-ipopt
+LUCI_DEPENDS:=+luci-lib-nixio +luci-lib-iptparser +tc +kmod-sched +iptables-mod-nat-extra +iptables-mod-ipopt
define Package/luci-app-splash/conffiles
/etc/config/luci_splash
LUCI_TITLE:=LuCI Statistics Application
LUCI_DEPENDS:= \
+ +luci-lib-iptparser \
+collectd +rrdtool1 +collectd-mod-rrdtool +collectd-mod-iwinfo \
+collectd-mod-cpu +collectd-mod-memory \
+collectd-mod-interface +collectd-mod-load +collectd-mod-network
--- /dev/null
+#
+# Copyright (C) 2018 The LuCI Team <luci@lists.subsignal.org>
+#
+# This is free software, licensed under the Apache License, Version 2.0 .
+#
+
+include $(TOPDIR)/rules.mk
+
+LUCI_TITLE:=Iptables listing parser class
+LUCI_DEPENDS:=+luci-base
+
+include ../../luci.mk
+
+# call BuildPackage - OpenWrt buildroot signature
--- /dev/null
+--[[
+
+Iptables parser and query library
+(c) 2008-2009 Jo-Philipp Wich <jow@openwrt.org>
+(c) 2008-2009 Steven Barth <steven@midlink.org>
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+ http://www.apache.org/licenses/LICENSE-2.0
+
+$Id$
+
+]]--
+
+local luci = {}
+luci.util = require "luci.util"
+luci.sys = require "luci.sys"
+luci.ip = require "luci.ip"
+
+local pcall = pcall
+local io = require "io"
+local tonumber, ipairs, table = tonumber, ipairs, table
+
+module("luci.sys.iptparser")
+
+IptParser = luci.util.class()
+
+function IptParser.__init__( self, family )
+ self._family = (tonumber(family) == 6) and 6 or 4
+ self._rules = { }
+ self._chains = { }
+ self._tables = { }
+
+ local t = self._tables
+ local s = self:_supported_tables(self._family)
+
+ if s.filter then t[#t+1] = "filter" end
+ if s.nat then t[#t+1] = "nat" end
+ if s.mangle then t[#t+1] = "mangle" end
+ if s.raw then t[#t+1] = "raw" end
+
+ if self._family == 4 then
+ self._nulladdr = "0.0.0.0/0"
+ self._command = "iptables -t %s --line-numbers -nxvL"
+ else
+ self._nulladdr = "::/0"
+ self._command = "ip6tables -t %s --line-numbers -nxvL"
+ end
+
+ self:_parse_rules()
+end
+
+function IptParser._supported_tables( self, family )
+ local tables = { }
+ local ok, lines = pcall(io.lines,
+ (family == 6) and "/proc/net/ip6_tables_names"
+ or "/proc/net/ip_tables_names")
+
+ if ok and lines then
+ local line
+ for line in lines do
+ tables[line] = true
+ end
+ end
+
+ return tables
+end
+
+-- search criteria as only argument. If args is nil or an empty table then all
+-- rules will be returned.
+--
+-- The following keys in the args table are recognized:
+-- <ul>
+-- <li> table - Match rules that are located within the given table
+-- <li> chain - Match rules that are located within the given chain
+-- <li> target - Match rules with the given target
+-- <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" (::/0) are always matched
+-- <li> destination - Match rules with the given destination, rules with
+-- 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
+-- with output interface "*" (=all) are always matched
+-- <li> flags - Match rules that match the given flags, current
+-- supported values are "-f" (--fragment)
+-- and "!f" (! --fragment)
+-- <li> options - Match rules containing all given options
+-- </ul>
+-- The return value is a list of tables representing the matched rules.
+-- Each rule table contains the following fields:
+-- <ul>
+-- <li> index - The index number of the rule
+-- <li> table - The table where the rule is located, can be one
+-- of "filter", "nat" or "mangle"
+-- <li> chain - The chain where the rule is located, e.g. "INPUT"
+-- or "postrouting_wan"
+-- <li> target - The rule target, e.g. "REJECT" or "DROP"
+-- <li> protocol The matching protocols, e.g. "all" or "tcp"
+-- <li> flags - Special rule options ("--", "-f" or "!f")
+-- <li> inputif - Input interface of the rule, e.g. "eth0.0"
+-- 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" (::/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
+-- <li> bytes - The number of total bytes matched by the rule
+-- </ul>
+-- Example:
+-- <pre>
+-- ip = luci.sys.iptparser.IptParser()
+-- result = ip.find( {
+-- target="REJECT",
+-- protocol="tcp",
+-- options={ "reject-with", "tcp-reset" }
+-- } )
+-- </pre>
+-- This will match all rules with target "-j REJECT",
+-- protocol "-p tcp" (or "-p all")
+-- and the option "--reject-with tcp-reset".
+function IptParser.find( self, args )
+
+ local args = args or { }
+ local rv = { }
+
+ 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
+
+ -- match table
+ if not ( not args.table or args.table:lower() == rule.table ) then
+ match = false
+ end
+
+ -- match chain
+ if not ( match == true and (
+ not args.chain or args.chain == rule.chain
+ ) ) then
+ match = false
+ end
+
+ -- match target
+ if not ( match == true and (
+ not args.target or args.target == rule.target
+ ) ) then
+ match = false
+ end
+
+ -- match protocol
+ if not ( match == true and (
+ not args.protocol or rule.protocol == "all" or
+ args.protocol:lower() == rule.protocol
+ ) ) then
+ match = false
+ end
+
+ -- match source
+ if not ( match == true and (
+ 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 == self._nulladdr or
+ self:_parse_addr(rule.destination):contains(args.destination)
+ ) ) then
+ match = false
+ end
+
+ -- match input interface
+ if not ( match == true and (
+ not args.inputif or rule.inputif == "*" or
+ args.inputif == rule.inputif
+ ) ) then
+ match = false
+ end
+
+ -- match output interface
+ if not ( match == true and (
+ not args.outputif or rule.outputif == "*" or
+ args.outputif == rule.outputif
+ ) ) then
+ match = false
+ end
+
+ -- match flags (the "opt" column)
+ if not ( match == true and (
+ not args.flags or rule.flags == args.flags
+ ) ) then
+ match = false
+ end
+
+ -- match specific options
+ if not ( match == true and (
+ not args.options or
+ self:_match_options( rule.options, args.options )
+ ) ) then
+ match = false
+ end
+
+ -- insert match
+ if match == true then
+ rv[#rv+1] = rule
+ end
+ end
+
+ return rv
+end
+
+
+-- through external commands.
+function IptParser.resync( self )
+ self._rules = { }
+ self._chain = nil
+ self:_parse_rules()
+end
+
+
+function IptParser.tables( self )
+ return self._tables
+end
+
+
+function IptParser.chains( self, table )
+ local lookup = { }
+ local chains = { }
+ for _, r in ipairs(self:find({table=table})) do
+ if not lookup[r.chain] then
+ lookup[r.chain] = true
+ chains[#chains+1] = r.chain
+ end
+ end
+ return chains
+end
+
+
+-- and "rules". The "rules" field is a table of rule tables.
+function IptParser.chain( self, table, chain )
+ return self._chains[table:lower()] and self._chains[table:lower()][chain]
+end
+
+
+function IptParser.is_custom_target( self, target )
+ for _, r in ipairs(self._rules) do
+ if r.chain == target then
+ return true
+ end
+ end
+ return false
+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(self._tables) do
+
+ self._chains[tbl] = { }
+
+ for i, rule in ipairs(luci.util.execl(self._command % tbl)) do
+
+ if rule:find( "^Chain " ) == 1 then
+
+ local crefs
+ local cname, cpol, cpkt, cbytes = rule:match(
+ "^Chain ([^%s]*) %(policy (%w+) " ..
+ "(%d+) packets, (%d+) bytes%)"
+ )
+
+ if not cname then
+ cname, crefs = rule:match(
+ "^Chain ([^%s]*) %((%d+) references%)"
+ )
+ end
+
+ self._chain = cname
+ self._chains[tbl][cname] = {
+ policy = cpol,
+ packets = tonumber(cpkt or 0),
+ bytes = tonumber(cbytes or 0),
+ references = tonumber(crefs or 0),
+ rules = { }
+ }
+
+ else
+ if rule:find("%d") == 1 then
+
+ local rule_parts = luci.util.split( rule, "%s+", nil, true )
+ local rule_details = { }
+
+ -- cope with rules that have no target assigned
+ if rule:match("^%d+%s+%d+%s+%d+%s%s") then
+ table.insert(rule_parts, 4, nil)
+ end
+
+ -- ip6tables opt column is usually zero-width
+ if self._family == 6 then
+ table.insert(rule_parts, 6, "--")
+ end
+
+ rule_details["table"] = tbl
+ rule_details["chain"] = self._chain
+ rule_details["index"] = tonumber(rule_parts[1])
+ rule_details["packets"] = tonumber(rule_parts[2])
+ rule_details["bytes"] = tonumber(rule_parts[3])
+ rule_details["target"] = rule_parts[4]
+ rule_details["protocol"] = rule_parts[5]
+ rule_details["flags"] = rule_parts[6]
+ rule_details["inputif"] = rule_parts[7]
+ rule_details["outputif"] = rule_parts[8]
+ rule_details["source"] = rule_parts[9]
+ rule_details["destination"] = rule_parts[10]
+ rule_details["options"] = { }
+
+ for i = 11, #rule_parts do
+ if #rule_parts[i] > 0 then
+ rule_details["options"][i-10] = rule_parts[i]
+ end
+ end
+
+ self._rules[#self._rules+1] = rule_details
+
+ self._chains[tbl][self._chain].rules[
+ #self._chains[tbl][self._chain].rules + 1
+ ] = rule_details
+ end
+ end
+ end
+ end
+
+ self._chain = nil
+end
+
+
+-- [internal] Return true if optlist1 contains all elements of optlist 2.
+-- Return false in all other cases.
+function IptParser._match_options( self, o1, o2 )
+
+ -- construct a hashtable of first options list to speed up lookups
+ local oh = { }
+ for i, opt in ipairs( o1 ) do oh[opt] = true end
+
+ -- iterate over second options list
+ -- each string in o2 must be also present in o1
+ -- if o2 contains a string which is not found in o1 then return false
+ for i, opt in ipairs( o2 ) do
+ if not oh[opt] then
+ return false
+ end
+ end
+
+ return true
+end
--- /dev/null
+---[[
+LuCI iptables parser and query library
+
+@cstyle instance
+]]
+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
+]]
+
+---[[
+Find all firewall rules that match the given criteria. Expects a table with
+
+search criteria as only argument. If args is nil or an empty table then all
+rules will be returned.
+]]
+
+---[[
+Rebuild the internal lookup table, for example when rules have changed
+
+through external commands.
+@class function
+@name IptParser.resync
+@return nothing
+]]
+
+---[[
+Find the names of all tables.
+
+@class function
+@name IptParser.tables
+@return Table of table names.
+]]
+
+---[[
+Find the names of all chains within the given table name.
+
+@class function
+@name IptParser.chains
+@param table String containing the table name
+@return Table of chain names in the order they occur.
+]]
+
+---[[
+Return the given firewall chain within the given table name.
+
+@class function
+@name IptParser.chain
+@param table String containing the table name
+@param chain String containing the chain name
+@return Table containing the fields "policy", "packets", "bytes"
+-- and "rules". The "rules" field is a table of rule tables.
+]]
+
+---[[
+Test whether the given target points to a custom chain.
+
+@class function
+@name IptParser.is_custom_target
+@param target String containing the target action
+@return Boolean indicating whether target is a custom chain.
+]]
+
+++ /dev/null
---[[
-
-Iptables parser and query library
-(c) 2008-2009 Jo-Philipp Wich <jow@openwrt.org>
-(c) 2008-2009 Steven Barth <steven@midlink.org>
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
- http://www.apache.org/licenses/LICENSE-2.0
-
-$Id$
-
-]]--
-
-local luci = {}
-luci.util = require "luci.util"
-luci.sys = require "luci.sys"
-luci.ip = require "luci.ip"
-
-local pcall = pcall
-local io = require "io"
-local tonumber, ipairs, table = tonumber, ipairs, table
-
-module("luci.sys.iptparser")
-
-IptParser = luci.util.class()
-
-function IptParser.__init__( self, family )
- self._family = (tonumber(family) == 6) and 6 or 4
- self._rules = { }
- self._chains = { }
- self._tables = { }
-
- local t = self._tables
- local s = self:_supported_tables(self._family)
-
- if s.filter then t[#t+1] = "filter" end
- if s.nat then t[#t+1] = "nat" end
- if s.mangle then t[#t+1] = "mangle" end
- if s.raw then t[#t+1] = "raw" end
-
- if self._family == 4 then
- self._nulladdr = "0.0.0.0/0"
- self._command = "iptables -t %s --line-numbers -nxvL"
- else
- self._nulladdr = "::/0"
- self._command = "ip6tables -t %s --line-numbers -nxvL"
- end
-
- self:_parse_rules()
-end
-
-function IptParser._supported_tables( self, family )
- local tables = { }
- local ok, lines = pcall(io.lines,
- (family == 6) and "/proc/net/ip6_tables_names"
- or "/proc/net/ip_tables_names")
-
- if ok and lines then
- local line
- for line in lines do
- tables[line] = true
- end
- end
-
- return tables
-end
-
--- search criteria as only argument. If args is nil or an empty table then all
--- rules will be returned.
---
--- The following keys in the args table are recognized:
--- <ul>
--- <li> table - Match rules that are located within the given table
--- <li> chain - Match rules that are located within the given chain
--- <li> target - Match rules with the given target
--- <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" (::/0) are always matched
--- <li> destination - Match rules with the given destination, rules with
--- 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
--- with output interface "*" (=all) are always matched
--- <li> flags - Match rules that match the given flags, current
--- supported values are "-f" (--fragment)
--- and "!f" (! --fragment)
--- <li> options - Match rules containing all given options
--- </ul>
--- The return value is a list of tables representing the matched rules.
--- Each rule table contains the following fields:
--- <ul>
--- <li> index - The index number of the rule
--- <li> table - The table where the rule is located, can be one
--- of "filter", "nat" or "mangle"
--- <li> chain - The chain where the rule is located, e.g. "INPUT"
--- or "postrouting_wan"
--- <li> target - The rule target, e.g. "REJECT" or "DROP"
--- <li> protocol The matching protocols, e.g. "all" or "tcp"
--- <li> flags - Special rule options ("--", "-f" or "!f")
--- <li> inputif - Input interface of the rule, e.g. "eth0.0"
--- 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" (::/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
--- <li> bytes - The number of total bytes matched by the rule
--- </ul>
--- Example:
--- <pre>
--- ip = luci.sys.iptparser.IptParser()
--- result = ip.find( {
--- target="REJECT",
--- protocol="tcp",
--- options={ "reject-with", "tcp-reset" }
--- } )
--- </pre>
--- This will match all rules with target "-j REJECT",
--- protocol "-p tcp" (or "-p all")
--- and the option "--reject-with tcp-reset".
-function IptParser.find( self, args )
-
- local args = args or { }
- local rv = { }
-
- 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
-
- -- match table
- if not ( not args.table or args.table:lower() == rule.table ) then
- match = false
- end
-
- -- match chain
- if not ( match == true and (
- not args.chain or args.chain == rule.chain
- ) ) then
- match = false
- end
-
- -- match target
- if not ( match == true and (
- not args.target or args.target == rule.target
- ) ) then
- match = false
- end
-
- -- match protocol
- if not ( match == true and (
- not args.protocol or rule.protocol == "all" or
- args.protocol:lower() == rule.protocol
- ) ) then
- match = false
- end
-
- -- match source
- if not ( match == true and (
- 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 == self._nulladdr or
- self:_parse_addr(rule.destination):contains(args.destination)
- ) ) then
- match = false
- end
-
- -- match input interface
- if not ( match == true and (
- not args.inputif or rule.inputif == "*" or
- args.inputif == rule.inputif
- ) ) then
- match = false
- end
-
- -- match output interface
- if not ( match == true and (
- not args.outputif or rule.outputif == "*" or
- args.outputif == rule.outputif
- ) ) then
- match = false
- end
-
- -- match flags (the "opt" column)
- if not ( match == true and (
- not args.flags or rule.flags == args.flags
- ) ) then
- match = false
- end
-
- -- match specific options
- if not ( match == true and (
- not args.options or
- self:_match_options( rule.options, args.options )
- ) ) then
- match = false
- end
-
- -- insert match
- if match == true then
- rv[#rv+1] = rule
- end
- end
-
- return rv
-end
-
-
--- through external commands.
-function IptParser.resync( self )
- self._rules = { }
- self._chain = nil
- self:_parse_rules()
-end
-
-
-function IptParser.tables( self )
- return self._tables
-end
-
-
-function IptParser.chains( self, table )
- local lookup = { }
- local chains = { }
- for _, r in ipairs(self:find({table=table})) do
- if not lookup[r.chain] then
- lookup[r.chain] = true
- chains[#chains+1] = r.chain
- end
- end
- return chains
-end
-
-
--- and "rules". The "rules" field is a table of rule tables.
-function IptParser.chain( self, table, chain )
- return self._chains[table:lower()] and self._chains[table:lower()][chain]
-end
-
-
-function IptParser.is_custom_target( self, target )
- for _, r in ipairs(self._rules) do
- if r.chain == target then
- return true
- end
- end
- return false
-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(self._tables) do
-
- self._chains[tbl] = { }
-
- for i, rule in ipairs(luci.util.execl(self._command % tbl)) do
-
- if rule:find( "^Chain " ) == 1 then
-
- local crefs
- local cname, cpol, cpkt, cbytes = rule:match(
- "^Chain ([^%s]*) %(policy (%w+) " ..
- "(%d+) packets, (%d+) bytes%)"
- )
-
- if not cname then
- cname, crefs = rule:match(
- "^Chain ([^%s]*) %((%d+) references%)"
- )
- end
-
- self._chain = cname
- self._chains[tbl][cname] = {
- policy = cpol,
- packets = tonumber(cpkt or 0),
- bytes = tonumber(cbytes or 0),
- references = tonumber(crefs or 0),
- rules = { }
- }
-
- else
- if rule:find("%d") == 1 then
-
- local rule_parts = luci.util.split( rule, "%s+", nil, true )
- local rule_details = { }
-
- -- cope with rules that have no target assigned
- if rule:match("^%d+%s+%d+%s+%d+%s%s") then
- table.insert(rule_parts, 4, nil)
- end
-
- -- ip6tables opt column is usually zero-width
- if self._family == 6 then
- table.insert(rule_parts, 6, "--")
- end
-
- rule_details["table"] = tbl
- rule_details["chain"] = self._chain
- rule_details["index"] = tonumber(rule_parts[1])
- rule_details["packets"] = tonumber(rule_parts[2])
- rule_details["bytes"] = tonumber(rule_parts[3])
- rule_details["target"] = rule_parts[4]
- rule_details["protocol"] = rule_parts[5]
- rule_details["flags"] = rule_parts[6]
- rule_details["inputif"] = rule_parts[7]
- rule_details["outputif"] = rule_parts[8]
- rule_details["source"] = rule_parts[9]
- rule_details["destination"] = rule_parts[10]
- rule_details["options"] = { }
-
- for i = 11, #rule_parts do
- if #rule_parts[i] > 0 then
- rule_details["options"][i-10] = rule_parts[i]
- end
- end
-
- self._rules[#self._rules+1] = rule_details
-
- self._chains[tbl][self._chain].rules[
- #self._chains[tbl][self._chain].rules + 1
- ] = rule_details
- end
- end
- end
- end
-
- self._chain = nil
-end
-
-
--- [internal] Return true if optlist1 contains all elements of optlist 2.
--- Return false in all other cases.
-function IptParser._match_options( self, o1, o2 )
-
- -- construct a hashtable of first options list to speed up lookups
- local oh = { }
- for i, opt in ipairs( o1 ) do oh[opt] = true end
-
- -- iterate over second options list
- -- each string in o2 must be also present in o1
- -- if o2 contains a string which is not found in o1 then return false
- for i, opt in ipairs( o2 ) do
- if not oh[opt] then
- return false
- end
- end
-
- return true
-end
+++ /dev/null
----[[
-LuCI iptables parser and query library
-
-@cstyle instance
-]]
-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
-]]
-
----[[
-Find all firewall rules that match the given criteria. Expects a table with
-
-search criteria as only argument. If args is nil or an empty table then all
-rules will be returned.
-]]
-
----[[
-Rebuild the internal lookup table, for example when rules have changed
-
-through external commands.
-@class function
-@name IptParser.resync
-@return nothing
-]]
-
----[[
-Find the names of all tables.
-
-@class function
-@name IptParser.tables
-@return Table of table names.
-]]
-
----[[
-Find the names of all chains within the given table name.
-
-@class function
-@name IptParser.chains
-@param table String containing the table name
-@return Table of chain names in the order they occur.
-]]
-
----[[
-Return the given firewall chain within the given table name.
-
-@class function
-@name IptParser.chain
-@param table String containing the table name
-@param chain String containing the chain name
-@return Table containing the fields "policy", "packets", "bytes"
--- and "rules". The "rules" field is a table of rule tables.
-]]
-
----[[
-Test whether the given target points to a custom chain.
-
-@class function
-@name IptParser.is_custom_target
-@param target String containing the target action
-@return Boolean indicating whether target is a custom chain.
-]]
-
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