121 lines
2.8 KiB
Go
121 lines
2.8 KiB
Go
// Licensed to Elasticsearch B.V. under one or more contributor
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// license agreements. See the NOTICE file distributed with
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// this work for additional information regarding copyright
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// ownership. Elasticsearch B.V. licenses this file to you under
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// the Apache License, Version 2.0 (the "License"); you may
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// not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing,
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// software distributed under the License is distributed on an
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// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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// KIND, either express or implied. See the License for the
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// specific language governing permissions and limitations
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// under the License.
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package udp
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import (
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"sync"
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"time"
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"github.com/elastic/beats/filebeat/channel"
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"github.com/elastic/beats/filebeat/harvester"
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"github.com/elastic/beats/filebeat/input"
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"github.com/elastic/beats/filebeat/inputsource"
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"github.com/elastic/beats/filebeat/inputsource/udp"
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"github.com/elastic/beats/filebeat/util"
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"github.com/elastic/beats/libbeat/beat"
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"github.com/elastic/beats/libbeat/common"
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"github.com/elastic/beats/libbeat/logp"
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)
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func init() {
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err := input.Register("udp", NewInput)
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if err != nil {
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panic(err)
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}
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}
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// Input defines a udp input to receive event on a specific host:port.
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type Input struct {
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sync.Mutex
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udp *udp.Server
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started bool
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outlet channel.Outleter
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}
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// NewInput creates a new udp input
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func NewInput(
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cfg *common.Config,
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outlet channel.Connector,
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context input.Context,
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) (input.Input, error) {
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out, err := outlet(cfg, context.DynamicFields)
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if err != nil {
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return nil, err
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}
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config := defaultConfig
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if err = cfg.Unpack(&config); err != nil {
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return nil, err
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}
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forwarder := harvester.NewForwarder(out)
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callback := func(data []byte, metadata inputsource.NetworkMetadata) {
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e := util.NewData()
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e.Event = beat.Event{
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Timestamp: time.Now(),
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Meta: common.MapStr{
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"truncated": metadata.Truncated,
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},
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Fields: common.MapStr{
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"message": string(data),
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"source": metadata.RemoteAddr.String(),
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},
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}
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forwarder.Send(e)
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}
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udp := udp.New(&config.Config, callback)
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return &Input{
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outlet: out,
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udp: udp,
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started: false,
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}, nil
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}
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// Run starts and start the UDP server and read events from the socket
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func (p *Input) Run() {
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p.Lock()
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defer p.Unlock()
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if !p.started {
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logp.Info("Starting UDP input")
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err := p.udp.Start()
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if err != nil {
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logp.Err("Error running harvester: %v", err)
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}
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p.started = true
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}
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}
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// Stop stops the UDP input
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func (p *Input) Stop() {
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defer p.outlet.Close()
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p.Lock()
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defer p.Unlock()
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logp.Info("Stopping UDP input")
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p.udp.Stop()
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p.started = false
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}
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// Wait suspends the UDP input
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func (p *Input) Wait() {
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p.Stop()
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}
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