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--
-- anylike
--
-- anylike is an IKEv2 Implementation written in Lua and C. It's main
-- design goal is to provide anytun and uanytun or any other SATP
-- implementation with a key exchange mechanism but it should also be
-- possible to use anylike as key exchange daemon for IPSec security
-- associations. The use of Lua guarantees that anylike is easily
-- portable to many platforms including very small ones like wireless
-- routers.
--
--
-- Copyright (C) 2007-2008 Markus Grueneis <gimpf@anylike.org>
-- Christian Pointner <equinox@anylike.org>
--
-- This file is part of anylike.
--
-- anylike is free software: you can redistribute it and/or modify
-- it under the terms of the GNU General Public License as published by
-- the Free Software Foundation, either version 3 of the License, or
-- any later version.
--
-- anylike is distributed in the hope that it will be useful,
-- but WITHOUT ANY WARRANTY; without even the implied warranty of
-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-- GNU General Public License for more details.
--
-- You should have received a copy of the GNU General Public License
-- along with anylike. If not, see <http://www.gnu.org/licenses/>.
--
socket = require("socket")
echo_server = {}
echo_server.init = function(host, port)
local ip, err = socket.dns.toip(host)
if(ip == nil) then
log.printf(log.ERROR, "can't resolve %s: %s", host, err)
return nil
end
local udp, err = socket.udp()
if(udp == nil) then
log.printf(log.ERROR, "can't create udp socket")
return nil
end
local ret, err = udp:setsockname(ip, port)
if(ret == nil) then
log.printf(log.ERROR, "setsockname(%s,%s) failed: %s", ip, port, err)
return nil
end
log.printf(log.NOTICE, "echo server listening on %s:%s", ip, port);
return udp
end
echo_server.handle = function(udp)
local dgrm, from_ip, from_port = udp:receivefrom()
if(dgrm == nil) then
log.printf(log.ERROR, "receivefrom(%s,%s) failed: %s", ip, port, from_ip)
return -1
end
local ret, err = udp:sendto(dgrm, from_ip, from_port)
if(ret == nil) then
log.printf(log.ERROR, "sendto(%s,%s) failed: %s", ip, port, err)
return -1
end
if(string.gsub(dgrm, "^(%w+)%s*%c$", "%1") == "quit") then
return 2
end
return 0
end
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