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--[[
LuCI - Lua Configuration Interface
shared module for luci-app-ddns-v2
Copyright 2014 Christian Schoenebeck <christian dot schoenebeck at gmail dot com>
function parse_url copied from https://svn.nmap.org/nmap/nselib/url.lua
Parses a URL and returns a table with all its parts according to RFC 2396.
@author Diego Nehab @author Eddie Bell <ejlbell@gmail.com>
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
]]--
module("luci.tools.ddns", package.seeall)
require "luci.sys"
require "nixio.fs"
function check_ipv6()
return nixio.fs.access("/proc/net/ipv6_route")
and nixio.fs.access("/usr/sbin/ip6tables")
end
function check_ssl()
if (luci.sys.call([[ grep -iq "\+ssl" /usr/bin/wget 2>/dev/null ]]) == 0) then
return true
else
return nixio.fs.access("/usr/bin/curl")
end
end
function check_proxy()
-- we prefere GNU Wget for communication
if (luci.sys.call([[ grep -iq "\+ssl" /usr/bin/wget 2>/dev/null ]]) == 0) then
return true
-- if not installed cURL must support proxy
elseif nixio.fs.access("/usr/bin/curl") then
return (luci.sys.call([[ grep -iq all_proxy /usr/lib/libcurl.so* 2>/dev/null ]]) == 0)
-- only BusyBox Wget is installed
else
return nixio.fs.access("/usr/bin/wget")
end
end
function check_bind_host()
return nixio.fs.access("/usr/bin/host")
end
-- function to calculate seconds from given interval and unit
function calc_seconds(interval, unit)
if not tonumber(interval) then
return nil
elseif unit == "days" then
return (tonumber(interval) * 86400) -- 60 sec * 60 min * 24 h
elseif unit == "hours" then
return (tonumber(interval) * 3600) -- 60 sec * 60 min
elseif unit == "minutes" then
return (tonumber(interval) * 60) -- 60 sec
elseif unit == "seconds" then
return tonumber(interval)
else
return nil
end
end
-- read PID from run file and verify if still running
function get_pid(section, run_dir)
local pid = tonumber(nixio.fs.readfile("%s/%s.pid" % { run_dir, section } ) or 0 )
if pid > 0 and not luci.sys.process.signal(pid, 0) then
pid = 0
end
return pid
end
-- replacement of build-in read of UCI option
-- modified AbstractValue.cfgvalue(self, section) from cbi.lua
-- needed to read from other option then current value definition
function read_value(self, section, option)
local value
if self.tag_error[section] then
value = self:formvalue(section)
else
value = self.map:get(section, option)
end
if not value then
return nil
elseif not self.cast or self.cast == type(value) then
return value
elseif self.cast == "string" then
if type(value) == "table" then
return value[1]
end
elseif self.cast == "table" then
return { value }
end
end
-----------------------------------------------------------------------------
-- copied from https://svn.nmap.org/nmap/nselib/url.lua
-- @author Diego Nehab
-- @author Eddie Bell <ejlbell@gmail.com>
--[[
URI parsing, composition and relative URL resolution
LuaSocket toolkit.
Author: Diego Nehab
RCS ID: $Id: url.lua,v 1.37 2005/11/22 08:33:29 diego Exp $
parse_query and build_query added For nmap (Eddie Bell <ejlbell@gmail.com>)
]]--
---
-- Parses a URL and returns a table with all its parts according to RFC 2396.
--
-- The following grammar describes the names given to the URL parts.
-- <code>
-- <url> ::= <scheme>://<authority>/<path>;<params>?<query>#<fragment>
-- <authority> ::= <userinfo>@<host>:<port>
-- <userinfo> ::= <user>[:<password>]
-- <path> :: = {<segment>/}<segment>
-- </code>
--
-- The leading <code>/</code> in <code>/<path></code> is considered part of
-- <code><path></code>.
-- @param url URL of request.
-- @param default Table with default values for each field.
-- @return A table with the following fields, where RFC naming conventions have
-- been preserved:
-- <code>scheme</code>, <code>authority</code>, <code>userinfo</code>,
-- <code>user</code>, <code>password</code>, <code>host</code>,
-- <code>port</code>, <code>path</code>, <code>params</code>,
-- <code>query</code>, and <code>fragment</code>.
-----------------------------------------------------------------------------
function parse_url(url) --, default)
-- initialize default parameters
local parsed = {}
-- for i,v in base.pairs(default or parsed) do
-- parsed[i] = v
-- end
-- remove whitespace
-- url = string.gsub(url, "%s", "")
-- get fragment
url = string.gsub(url, "#(.*)$",
function(f)
parsed.fragment = f
return ""
end)
-- get scheme. Lower-case according to RFC 3986 section 3.1.
url = string.gsub(url, "^([%w][%w%+%-%.]*)%:",
function(s)
parsed.scheme = string.lower(s);
return ""
end)
-- get authority
url = string.gsub(url, "^//([^/]*)",
function(n)
parsed.authority = n
return ""
end)
-- get query stringing
url = string.gsub(url, "%?(.*)",
function(q)
parsed.query = q
return ""
end)
-- get params
url = string.gsub(url, "%;(.*)",
function(p)
parsed.params = p
return ""
end)
-- path is whatever was left
parsed.path = url
local authority = parsed.authority
if not authority then
return parsed
end
authority = string.gsub(authority,"^([^@]*)@",
function(u)
parsed.userinfo = u;
return ""
end)
authority = string.gsub(authority, ":([0-9]*)$",
function(p)
if p ~= "" then
parsed.port = p
end;
return ""
end)
if authority ~= "" then
parsed.host = authority
end
local userinfo = parsed.userinfo
if not userinfo then
return parsed
end
userinfo = string.gsub(userinfo, ":([^:]*)$",
function(p)
parsed.password = p;
return ""
end)
parsed.user = userinfo
return parsed
end
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