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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2021-03-13 07:54:12 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2021-03-13 07:54:12 +0000 |
commit | 4754ed45b607e82450a5e31fea1da3ba61433b04 (patch) | |
tree | 3554490bdc003e6004f605abe41929cdf98b0651 /src/output/udpcli.lua | |
parent | Initial commit. (diff) | |
download | dnsjit-4754ed45b607e82450a5e31fea1da3ba61433b04.tar.xz dnsjit-4754ed45b607e82450a5e31fea1da3ba61433b04.zip |
Adding upstream version 1.1.0+debian.upstream/1.1.0+debian
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | src/output/udpcli.lua | 121 |
1 files changed, 121 insertions, 0 deletions
diff --git a/src/output/udpcli.lua b/src/output/udpcli.lua new file mode 100644 index 0000000..0584725 --- /dev/null +++ b/src/output/udpcli.lua @@ -0,0 +1,121 @@ +-- 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 |