1 files changed, 121 insertions, 0 deletions
diff --git a/include/dnsjit/output/udpcli.lua b/include/dnsjit/output/udpcli.lua
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+++ b/include/dnsjit/output/udpcli.lua
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+-- Copyright (c) 2018-2021, OARC, Inc.
+-- All rights reserved.
+--
+-- This file is part of dnsjit.
+--
+-- dnsjit 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
+-- (at your option) any later version.
+--
+-- dnsjit 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 dnsjit.  If not, see <http://www.gnu.org/licenses/>.
+
+-- dnsjit.output.udpcli
+-- Simple and dumb UDP DNS client
+--   local output = require("dnsjit.output.udpcli").new("127.0.0.1", "53")
+--
+-- Simple and rather dumb DNS client that takes any payload you give it and
+-- sends the full payload over UDP.
+-- .SS Attributes
+-- .TP
+-- timeout
+-- A
+-- .I core.timespec
+-- that is used when producing objects.
+module(...,package.seeall)
+
+require("dnsjit.output.udpcli_h")
+local ffi = require("ffi")
+local C = ffi.C
+
+local t_name = "output_udpcli_t"
+local output_udpcli_t = ffi.typeof(t_name)
+local Udpcli = {}
+
+-- Create a new Udpcli output.
+function Udpcli.new()
+    local self = {
+        obj = output_udpcli_t(),
+    }
+    C.output_udpcli_init(self.obj)
+    ffi.gc(self.obj, C.output_udpcli_destroy)
+    return setmetatable(self, { __index = Udpcli })
+end
+
+-- Set the timeout when producing objects.
+function Udpcli:timeout(seconds, nanoseconds)
+    self.obj.timeout.sec = seconds
+    self.obj.timeout.nsec = nanoseconds
+end
+
+-- Connect to the
+-- .I host
+-- and
+-- .I port
+-- and return 0 if successful.
+function Udpcli:connect(host, port)
+    return C.output_udpcli_connect(self.obj, host, port)
+end
+
+-- Enable (true) or disable (false) nonblocking mode and
+-- return 0 if successful, if
+-- .I bool
+-- is not specified then return if nonblocking mode is on (true) or off (false).
+function Udpcli:nonblocking(bool)
+    if bool == nil then
+        if C.output_udpcli_nonblocking(self.obj) == 1 then
+            return true
+        end
+        return false
+    elseif bool == true then
+        return C.output_udpcli_set_nonblocking(self.obj, 1)
+    else
+        return C.output_udpcli_set_nonblocking(self.obj, 0)
+    end
+end
+
+-- Return the C functions and context for receiving objects, these objects
+-- will be sent.
+function Udpcli:receive()
+    return C.output_udpcli_receiver(self.obj), self.obj
+end
+
+-- Return the C functions and context for producing objects, these objects
+-- are received.
+-- If nonblocking mode is enabled the producer will return a payload object
+-- with length zero if there was nothing to receive.
+-- If nonblocking mode is disabled the producer will wait for data and if
+-- timed out (see
+-- .IR timeout )
+-- it will return a payload object with length zero.
+-- The producer returns nil on error.
+function Udpcli:produce()
+    return C.output_udpcli_producer(self.obj), self.obj
+end
+
+-- Return the number of "packets" sent, actually the number of completely sent
+-- payloads.
+function Udpcli:packets()
+    return tonumber(self.obj.pkts)
+end
+
+-- Return the number of "packets" received, actually the number of successful
+-- calls to
+-- .IR recvfrom (2)
+-- that returned data.
+function Udpcli:received()
+    return tonumber(self.obj.pkts_recv)
+end
+
+-- Return the number of errors when sending or receiving.
+function Udpcli:errors()
+    return tonumber(self.obj.errs)
+end
+
+return Udpcli