137 lines
2.6 KiB
Go
137 lines
2.6 KiB
Go
/*
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* Copyright (C) 2018 Simon Eisenmann
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* Copyright (C) 2014-2017 struktur AG
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may 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, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package realtimetraffic
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import (
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"fmt"
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"log"
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"os"
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"path"
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"strconv"
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"strings"
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"time"
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)
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var grabkeys = []string{
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"collisions",
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"multicast",
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"rx_bytes",
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"rx_compressed",
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"rx_crc_errors",
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"rx_dropped",
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"rx_errors",
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"rx_fifo_errors",
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"rx_frame_errors",
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"rx_length_errors",
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"rx_missed_errors",
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"rx_over_errors",
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"rx_packets",
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"tx_aborted_errors",
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"tx_bytes",
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"tx_carrier_errors",
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"tx_compressed",
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"tx_dropped",
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"tx_errors",
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"tx_fifo_errors",
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"tx_heartbeat_errors",
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"tx_packets",
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"tx_window_errors",
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}
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type Grabber struct {
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path string
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iface string
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quit chan bool
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running bool
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count uint
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}
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func NewGrabber(iface string) *Grabber {
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return &Grabber{
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iface: iface,
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path: fmt.Sprintf("/sys/class/net/%s/statistics", iface),
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}
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}
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func (g *Grabber) grab() *Interfacedata {
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data := &Interfacedata{}
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statistics := map[string]interface{}{}
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value := make([]byte, 100)
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var file *os.File
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var err error
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for _, key := range grabkeys {
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file, err = os.Open(path.Join(g.path, key))
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if err == nil {
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count, ferr := file.Read(value)
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if ferr == nil {
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statistics[key], ferr = strconv.ParseInt(strings.TrimSpace(string(value[:count])), 10, 64)
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if ferr != nil {
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log.Println("Failed to process data", ferr, value[:count], count)
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}
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} else {
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log.Println("Failed to read data", ferr)
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}
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file.Close()
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} else {
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log.Println("Failed to load data", err)
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}
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}
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data.set(g.iface, statistics)
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return data
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}
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func (g *Grabber) Start(ch chan<- *Interfacedata) {
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g.count++
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if g.running {
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return
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}
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g.quit = make(chan bool)
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g.running = true
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go func() {
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fmt.Printf("Grabbing started: %s\n", g.iface)
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ticker := time.NewTicker(1000 * time.Millisecond)
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for {
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select {
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case <-ticker.C:
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ch <- g.grab()
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case <-g.quit:
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ticker.Stop()
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return
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}
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}
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}()
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}
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func (g *Grabber) Stop() {
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if !g.running {
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return
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}
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g.count--
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if g.count == 0 {
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g.running = false
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close(g.quit)
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fmt.Printf("Grabbing stopped: %s\n", g.iface)
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}
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}
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