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Diffstat (limited to 'modules/luci-base/luasrc/sys/iptparser.lua')
| -rw-r--r-- | modules/luci-base/luasrc/sys/iptparser.lua | 374 |
1 files changed, 0 insertions, 374 deletions
diff --git a/modules/luci-base/luasrc/sys/iptparser.lua b/modules/luci-base/luasrc/sys/iptparser.lua deleted file mode 100644 index 7ff665e7a..000000000 --- a/modules/luci-base/luasrc/sys/iptparser.lua +++ /dev/null @@ -1,374 +0,0 @@ ---[[ - -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 |