mirror of
https://github.com/gl-inet/glkvm-cloud.git
synced 2026-09-21 01:53:23 +00:00
Jianhui Zhao
116 lines
2.7 KiB
Go
116 lines
2.7 KiB
Go
/*
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* Copyright (C) 2017 Jianhui Zhao <jianhuizhao329@gmail.com>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301
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* USA
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*/
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package main
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import (
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"time"
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"github.com/gorilla/websocket"
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)
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const (
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/* Max session id for each device */
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RTTY_MAX_SESSION_ID_DEV = 5
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)
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type Device struct {
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*Client
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desc string /* description of the device */
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timestamp int64 /* Connection time */
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sessions map[uint8]string /* sessions of each device */
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}
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type DevMessage struct {
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msgType int
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data []byte
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dev *Device
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}
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func (dev *Device) Close() {
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dev.Client.Close()
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dev.br.disconnecting <- dev
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}
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func (dev *Device) getFreeSid() uint8 {
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for sid := uint8(1); sid <= RTTY_MAX_SESSION_ID_DEV; sid++ {
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if _, ok := dev.sessions[sid]; !ok {
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return sid
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}
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}
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return uint8(0)
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}
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/*
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* If the Server does not receive a PING Packet from the Client within one and
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* a half times the Keep Alive time period, the server will disconnect the
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* Connection
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*/
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func (dev *Device) keepAlive(keepalive int64) {
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defer dev.Close()
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ticker := time.NewTicker(time.Second * time.Duration(keepalive))
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last := time.Now().Unix()
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keepalive = keepalive * 3
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/* Get the current ping handler */
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pingHandler := dev.ws.PingHandler()
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dev.ws.SetPingHandler(func(appData string) error {
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last = time.Now().Unix()
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return pingHandler(appData)
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})
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for {
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select {
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case <-dev.closeChan:
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return
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case <-ticker.C:
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now := time.Now().Unix()
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if now-last > keepalive {
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log.Printf("Inactive device in long time, now kill it: %s\n", dev.devid)
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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 (dev *Device) readAlway() {
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defer dev.Close()
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for {
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msgType, data, err := dev.ws.ReadMessage()
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if err != nil {
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if websocket.IsUnexpectedCloseError(err, websocket.CloseGoingAway, websocket.CloseAbnormalClosure) {
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log.Printf("error: %v", err)
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}
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break
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}
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msg := &DevMessage{msgType, data, dev}
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select {
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case dev.br.inDevMessage <- msg:
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case <-dev.closeChan:
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log.Println("closeChan from readAlway")
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return
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}
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}
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}
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