mirror of https://github.com/bjdgyc/anylink.git
104 lines
1.8 KiB
Go
104 lines
1.8 KiB
Go
package handler
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import (
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"net"
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"time"
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"github.com/bjdgyc/anylink/base"
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"github.com/bjdgyc/anylink/sessdata"
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)
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func LinkDtls(conn net.Conn, cSess *sessdata.ConnSession) {
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defer func() {
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base.Debug("LinkDtls return", cSess.IpAddr)
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_ = conn.Close()
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cSess.Close()
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}()
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var (
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dead = time.Duration(cSess.CstpDpd+5) * time.Second
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)
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go dtlsWrite(conn, cSess)
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for {
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err := conn.SetReadDeadline(time.Now().Add(dead))
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if err != nil {
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base.Error("SetDeadline: ", err)
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return
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}
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hdata := make([]byte, BufferSize)
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n, err := conn.Read(hdata)
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if err != nil {
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base.Error("read hdata: ", err)
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return
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}
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// 限流设置
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err = cSess.RateLimit(n, true)
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if err != nil {
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base.Error(err)
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}
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switch hdata[0] {
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case 0x07: // KEEPALIVE
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// do nothing
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base.Debug("recv keepalive", cSess.IpAddr)
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case 0x05: // DISCONNECT
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base.Debug("DISCONNECT", cSess.IpAddr)
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return
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case 0x03: // DPD-REQ
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base.Debug("recv DPD-REQ", cSess.IpAddr)
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if payloadOut(cSess, sessdata.LTypeIPData, 0x04, nil) {
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return
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}
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case 0x04:
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base.Debug("recv DPD-RESP", cSess.IpAddr)
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case 0x00: // DATA
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if payloadIn(cSess, sessdata.LTypeIPData, 0x00, hdata[1:]) {
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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 dtlsWrite(conn net.Conn, cSess *sessdata.ConnSession) {
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defer func() {
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base.Debug("dtlsWrite return", cSess.IpAddr)
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_ = conn.Close()
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cSess.Close()
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}()
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var (
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header []byte
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payload *sessdata.Payload
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)
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for {
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select {
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case payload = <-cSess.PayloadOut:
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case <-cSess.CloseChan:
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return
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}
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if payload.LType != sessdata.LTypeIPData {
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continue
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}
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header = []byte{payload.PType}
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header = append(header, payload.Data...)
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n, err := conn.Write(header)
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if err != nil {
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base.Error("write err", err)
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return
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}
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// 限流设置
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err = cSess.RateLimit(n, false)
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if err != nil {
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base.Error(err)
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}
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}
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}
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