mirror of
https://github.com/KusakabeShi/EtherGuard-VPN.git
synced 2024-11-21 14:53:08 +01:00
Check packetsize before process to fix out of range
This commit is contained in:
parent
89f1548dd4
commit
5608430139
@ -356,6 +356,7 @@ func NewDevice(tapDevice tap.Device, id mtypes.Vertex, bind conn.Bind, logger *L
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device.SuperConfigPath = configpath
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device.SuperConfig = sconfig
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device.EdgeConfig = &mtypes.EdgeConfig{}
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device.EdgeConfig.Interface.MTU = 1416
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device.Chan_server_pong = superevents.Event_server_pong
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device.Chan_server_register = superevents.Event_server_register
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device.LogLevel = sconfig.LogLevel
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@ -7,6 +7,7 @@ package device
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import (
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"bytes"
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"encoding/base64"
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"encoding/binary"
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"errors"
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"fmt"
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@ -427,6 +428,7 @@ func (peer *Peer) RoutineSequentialReceiver() {
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should_process := false
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should_receive := false
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should_transfer := false
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packetlan := 0
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currentTime := time.Now()
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storeTime := currentTime.Add(time.Second)
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if currentTime.After((*peer.LastPacketReceivedAdd1Sec.Load().(*time.Time))) {
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@ -463,24 +465,30 @@ func (peer *Peer) RoutineSequentialReceiver() {
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device.log.Errorf("Invalid EgHeader from peer %v", peer)
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goto skip
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}
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EgHeader, _ = path.NewEgHeader(elem.packet[0:path.EgHeaderLen]) // EG header
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EgHeader, _ = path.NewEgHeader(elem.packet[0:path.EgHeaderLen], device.EdgeConfig.Interface.MTU) // EG header
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src_nodeID = EgHeader.GetSrc()
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dst_nodeID = EgHeader.GetDst()
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elem.packet = elem.packet[:EgHeader.GetPacketLength()+path.EgHeaderLen] // EG header + true packet
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packet_type = elem.Type
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packetlan = int(EgHeader.GetPacketLength() + path.EgHeaderLen)
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if packetlan >= len(elem.packet) {
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device.log.Errorf("received invalid packet content: %v S:%v D:%v From:%v IP:%v", base64.StdEncoding.EncodeToString([]byte(elem.packet)), src_nodeID.ToString(), dst_nodeID.ToString(), peer.ID.ToString(), peer.endpoint.DstToString())
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goto skip
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}
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elem.packet = elem.packet[:packetlan] // EG header + true packet
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if device.IsSuperNode {
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if packet_type.IsControl_Edge2Super() {
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should_process = true
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} else {
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device.log.Errorf("received unsupported packet_type %v from %v %v", packet_type, src_nodeID, peer.endpoint.DstToString())
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device.log.Errorf("received unsupported packet_type %v S:%v From:%v IP:%v", packet_type, src_nodeID, peer.ID.ToString(), peer.endpoint.DstToString())
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goto skip
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}
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switch dst_nodeID {
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case mtypes.NodeID_SuperNode:
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should_process = true
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default:
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device.log.Errorf("received invalid dst_nodeID %v from %v %v", dst_nodeID, src_nodeID, peer.endpoint.DstToString())
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device.log.Errorf("received invalid dst_nodeID: %v S:%v From:%v IP:%v", dst_nodeID, src_nodeID, peer.ID.ToString(), peer.endpoint.DstToString())
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goto skip
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}
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} else {
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@ -515,7 +523,7 @@ func (peer *Peer) RoutineSequentialReceiver() {
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}
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} else {
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device.log.Errorf("received ServerUpdate packet from non supernode %v %v", src_nodeID, peer.endpoint.DstToString())
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device.log.Errorf("received ServerUpdate packet from non supernode S:%v From:%v IP:%v", src_nodeID, peer.ID.ToString(), peer.endpoint.DstToString())
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goto skip
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}
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}
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@ -530,7 +538,7 @@ func (peer *Peer) RoutineSequentialReceiver() {
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should_transfer = true
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} else {
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if device.LogLevel.LogTransit {
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fmt.Printf("Transit: Duplicate packet received from %d through %d , src_nodeID = %d . Dropped.\n", peer.ID, device.ID, src_nodeID)
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fmt.Printf("Transit: Duplicate packet dropped. From:%v Me:%v To:%v S:%v D:%v\n", peer.ID, device.ID, peer_out.ID, src_nodeID.ToString(), dst_nodeID.ToString())
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}
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goto skip
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}
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@ -569,7 +577,7 @@ func (peer *Peer) RoutineSequentialReceiver() {
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peer_out = device.peers.IDMap[next_id]
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device.peers.RUnlock()
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if device.LogLevel.LogTransit {
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fmt.Printf("Transit: Transfer packet from %d through %d to %d\n", peer.ID, device.ID, peer_out.ID)
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fmt.Printf("Transit: Transfer From:%v Me:%v To:%v S:%v D:%v\n", peer.ID, device.ID, peer_out.ID, src_nodeID.ToString(), dst_nodeID.ToString())
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}
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go device.SendPacket(peer_out, elem.Type, elem.packet, MessageTransportOffsetContent)
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}
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@ -581,7 +589,7 @@ func (peer *Peer) RoutineSequentialReceiver() {
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if packet_type != path.NormalPacket {
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if device.LogLevel.LogControl {
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if peer.GetEndpointDstStr() != "" {
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fmt.Printf("Control: Received S:%v D:%v %v From:%v\n", src_nodeID.ToString(), dst_nodeID.ToString(), device.sprint_received(packet_type, elem.packet[path.EgHeaderLen:]), peer.ID.ToString())
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fmt.Printf("Control: Recv %v S:%v D:%v From:%v IP:%v\n", device.sprint_received(packet_type, elem.packet[path.EgHeaderLen:]), src_nodeID.ToString(), dst_nodeID.ToString(), peer.ID.ToString(), peer.GetEndpointDstStr())
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}
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}
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err = device.process_received(packet_type, peer, elem.packet[path.EgHeaderLen:])
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@ -599,7 +607,7 @@ func (peer *Peer) RoutineSequentialReceiver() {
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}
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if device.LogLevel.LogNormal {
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packet_len := len(elem.packet) - path.EgHeaderLen
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fmt.Println("Normal: Reveived Normal packet From:" + peer.GetEndpointDstStr() + " SrcID:" + src_nodeID.ToString() + " DstID:" + dst_nodeID.ToString() + " Len:" + strconv.Itoa(packet_len))
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fmt.Println("Normal: Recv Normal packet From:" + peer.GetEndpointDstStr() + " SrcID:" + src_nodeID.ToString() + " DstID:" + dst_nodeID.ToString() + " Len:" + strconv.Itoa(packet_len))
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packet := gopacket.NewPacket(elem.packet[path.EgHeaderLen:], layers.LayerTypeEthernet, gopacket.Default)
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fmt.Println(packet.Dump())
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}
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@ -36,27 +36,28 @@ func (device *Device) SendPacket(peer *Peer, usage path.Usage, packet []byte, of
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}
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if usage == path.NormalPacket && len(packet)-path.EgHeaderLen <= 12 {
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if device.LogLevel.LogNormal {
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fmt.Println("Normal: Invalid packet: Ethernet packet too small")
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fmt.Printf("Normal: Send Len:%v Invalid packet: Ethernet packet too small\n", len(packet))
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}
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return
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}
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if device.LogLevel.LogNormal {
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EgHeader, _ := path.NewEgHeader(packet[:path.EgHeaderLen])
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EgHeader, _ := path.NewEgHeader(packet[:path.EgHeaderLen], device.EdgeConfig.Interface.MTU)
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if usage == path.NormalPacket && EgHeader.GetSrc() == device.ID {
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dst_nodeID := EgHeader.GetDst()
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packet_len := len(packet) - path.EgHeaderLen
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fmt.Println("Normal: Send Normal packet To:" + peer.GetEndpointDstStr() + " SrcID:" + device.ID.ToString() + " DstID:" + dst_nodeID.ToString() + " Len:" + strconv.Itoa(packet_len))
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fmt.Printf("Normal: Send Len%v S:%v D:%v To:%v IP:%v:\n", packet_len, device.ID.ToString(), dst_nodeID.ToString(), peer.ID.ToString(), peer.GetEndpointDstStr())
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packet := gopacket.NewPacket(packet[path.EgHeaderLen:], layers.LayerTypeEthernet, gopacket.Default)
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fmt.Println(packet.Dump())
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}
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}
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if device.LogLevel.LogControl {
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EgHeader, _ := path.NewEgHeader(packet[:path.EgHeaderLen])
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EgHeader, _ := path.NewEgHeader(packet[:path.EgHeaderLen], device.EdgeConfig.Interface.MTU)
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if usage != path.NormalPacket {
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if peer.GetEndpointDstStr() != "" {
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src_nodeID := EgHeader.GetSrc()
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dst_nodeID := EgHeader.GetDst()
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fmt.Printf("Control: Send D:%v %v To:%v\n", dst_nodeID.ToString(), device.sprint_received(usage, packet[path.EgHeaderLen:]), peer.GetEndpointDstStr())
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fmt.Printf("Control: Send %v S:%v D:%v To:%v IP:%v\n", device.sprint_received(usage, packet[path.EgHeaderLen:]), src_nodeID.ToString(), dst_nodeID.ToString(), peer.ID.ToString(), peer.GetEndpointDstStr())
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}
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}
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}
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@ -246,7 +247,7 @@ func (device *Device) GeneratePingPacket(src_nodeID mtypes.Vertex, request_reply
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return nil, path.PingPacket, err
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}
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buf := make([]byte, path.EgHeaderLen+len(body))
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header, _ := path.NewEgHeader(buf[0:path.EgHeaderLen])
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header, _ := path.NewEgHeader(buf[0:path.EgHeaderLen], device.EdgeConfig.Interface.MTU)
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if err != nil {
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return nil, path.PingPacket, err
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}
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@ -305,7 +306,7 @@ func (device *Device) server_process_RegisterMsg(peer *Peer, content mtypes.Regi
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return err
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}
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buf := make([]byte, path.EgHeaderLen+len(body))
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header, _ := path.NewEgHeader(buf[:path.EgHeaderLen])
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header, _ := path.NewEgHeader(buf[:path.EgHeaderLen], device.EdgeConfig.Interface.MTU)
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header.SetSrc(device.ID)
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header.SetTTL(0)
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header.SetPacketLength(uint16(len(body)))
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@ -348,7 +349,7 @@ func (device *Device) process_ping(peer *Peer, content mtypes.PingMsg) error {
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return err
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}
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buf := make([]byte, path.EgHeaderLen+len(body))
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header, _ := path.NewEgHeader(buf[:path.EgHeaderLen])
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header, _ := path.NewEgHeader(buf[:path.EgHeaderLen], device.EdgeConfig.Interface.MTU)
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header.SetSrc(device.ID)
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header.SetTTL(device.EdgeConfig.DefaultTTL)
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header.SetPacketLength(uint16(len(body)))
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@ -379,7 +380,7 @@ func (device *Device) process_pong(peer *Peer, content mtypes.PongMsg) error {
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return err
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}
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buf := make([]byte, path.EgHeaderLen+len(body))
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header, _ := path.NewEgHeader(buf[:path.EgHeaderLen])
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header, _ := path.NewEgHeader(buf[:path.EgHeaderLen], device.EdgeConfig.Interface.MTU)
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header.SetSrc(device.ID)
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header.SetTTL(device.EdgeConfig.DefaultTTL)
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header.SetPacketLength(uint16(len(body)))
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@ -702,7 +703,7 @@ func (device *Device) process_RequestPeerMsg(content mtypes.QueryPeerMsg) error
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continue
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}
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buf := make([]byte, path.EgHeaderLen+len(body))
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header, _ := path.NewEgHeader(buf[0:path.EgHeaderLen])
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header, _ := path.NewEgHeader(buf[0:path.EgHeaderLen], device.EdgeConfig.Interface.MTU)
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header.SetDst(mtypes.NodeID_AllPeer)
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header.SetTTL(device.EdgeConfig.DefaultTTL)
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header.SetSrc(device.ID)
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@ -874,7 +875,7 @@ func (device *Device) RoutineRegister(startchan chan struct{}) {
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HttpPostCount: device.HttpPostCount,
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})
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buf := make([]byte, path.EgHeaderLen+len(body))
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header, _ := path.NewEgHeader(buf[0:path.EgHeaderLen])
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header, _ := path.NewEgHeader(buf[0:path.EgHeaderLen], device.EdgeConfig.Interface.MTU)
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header.SetDst(mtypes.NodeID_SuperNode)
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header.SetTTL(0)
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header.SetSrc(device.ID)
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@ -251,7 +251,7 @@ func (device *Device) RoutineReadFromTUN() {
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//add custom header dst_node, src_node, ttl
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size += path.EgHeaderLen
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elem.packet = elem.buffer[offset : offset+size]
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EgBody, _ := path.NewEgHeader(elem.packet[0:path.EgHeaderLen])
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EgBody, _ := path.NewEgHeader(elem.packet[0:path.EgHeaderLen], device.EdgeConfig.Interface.MTU)
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dst_nodeID := EgBody.GetDst()
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dstMacAddr := tap.GetDstMacAddr(elem.packet[path.EgHeaderLen:])
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// lookup peer
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@ -20,8 +20,8 @@ PrivKey: 12CRJpzWOTRQDOdtROtwwWb68B4HHjSbrS1WySAkWYI=
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ListenPort: 0
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LogLevel:
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LogLevel: error
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LogTransit: false
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LogNormal: false
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LogTransit: true
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LogNormal: true
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LogControl: true
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LogInternal: true
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LogNTP: true
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@ -20,8 +20,8 @@ PrivKey: 2swvwMtyuOKd2HsrfSY1eEYKRjhS4dCr2Cwtj9or0us=
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ListenPort: 0
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LogLevel:
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LogLevel: error
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LogTransit: false
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LogNormal: false
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LogTransit: true
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LogNormal: true
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LogControl: true
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LogInternal: true
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LogNTP: true
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@ -20,8 +20,8 @@ PrivKey: iquaLyD+YLzW3zvI0JGSed9GfDqHYMh/vUaU0PYVAbQ=
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ListenPort: 0
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LogLevel:
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LogLevel: error
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LogTransit: false
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LogNormal: false
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LogTransit: true
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LogNormal: true
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LogControl: true
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LogInternal: true
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LogNTP: true
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2
go.mod
2
go.mod
@ -5,7 +5,7 @@ go 1.17
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require (
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git.fd.io/govpp.git v0.3.6-0.20210927044411-385ccc0d8ba9
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git.fd.io/govpp.git/extras v0.0.0-20211129071605-0a0c03d45954
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github.com/KusakabeSi/go-cache v0.0.0-20210823132304-22b5b1d22b41
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github.com/KusakabeSi/go-cache v0.0.0-20211210164531-8ee1215c700a
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github.com/beevik/ntp v0.3.0
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github.com/golang-jwt/jwt v3.2.2+incompatible
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github.com/google/gopacket v1.1.19
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4
go.sum
4
go.sum
@ -2,8 +2,8 @@ git.fd.io/govpp.git v0.3.6-0.20210927044411-385ccc0d8ba9 h1:QFHVGWCWf6e226vMy1zU
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git.fd.io/govpp.git v0.3.6-0.20210927044411-385ccc0d8ba9/go.mod h1:OCVd4W8SH+666KRQoMj6PM+oipLDZAHhqMz9B1TGbgI=
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git.fd.io/govpp.git/extras v0.0.0-20211129071605-0a0c03d45954 h1:F4tLgA7dY1lY1GQ6D7dMiLie39FV6QXinM7BU9cRENY=
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git.fd.io/govpp.git/extras v0.0.0-20211129071605-0a0c03d45954/go.mod h1:GhryuN3x7qZ/wYLlEiPUVi6glJvh5S5V6E+XASV4774=
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github.com/KusakabeSi/go-cache v0.0.0-20210823132304-22b5b1d22b41 h1:o6o1+n8vqD/Qsxw26x7aLH6QQzPGGmQdKQqQRpkA/ac=
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github.com/KusakabeSi/go-cache v0.0.0-20210823132304-22b5b1d22b41/go.mod h1:u+fcGXuY9eUnv1Lw58RgBJcfNxv8rT2jHNI3tdDUHp0=
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github.com/KusakabeSi/go-cache v0.0.0-20211210164531-8ee1215c700a h1:5OUSCHnmA6F0QtzSl8Am/QDBI9d16pidq6SbHiPO69U=
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github.com/KusakabeSi/go-cache v0.0.0-20211210164531-8ee1215c700a/go.mod h1:u+fcGXuY9eUnv1Lw58RgBJcfNxv8rT2jHNI3tdDUHp0=
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github.com/beevik/ntp v0.3.0 h1:xzVrPrE4ziasFXgBVBZJDP0Wg/KpMwk2KHJ4Ba8GrDw=
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github.com/beevik/ntp v0.3.0/go.mod h1:hIHWr+l3+/clUnF44zdK+CWW7fO8dR5cIylAQ76NRpg=
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github.com/bennyscetbun/jsongo v1.1.0/go.mod h1:suxbVmjBV8+A2BBAM5EYVh6Uj8j3rqJhzWf3hv7Ff8U=
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@ -333,7 +333,7 @@ func super_peerdel_notify(toDelete mtypes.Vertex, PubKey string) {
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for i := 0; i < 10; i++ {
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body, _ := mtypes.GetByte(&ServerUpdateMsg)
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buf := make([]byte, path.EgHeaderLen+len(body))
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header, _ := path.NewEgHeader(buf[:path.EgHeaderLen])
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header, _ := path.NewEgHeader(buf[:path.EgHeaderLen], 1416)
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header.SetSrc(mtypes.NodeID_SuperNode)
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header.SetTTL(0)
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header.SetPacketLength(uint16(len(body)))
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@ -464,7 +464,7 @@ func PushNhTable(force bool) {
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return
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}
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buf := make([]byte, path.EgHeaderLen+len(body))
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header, _ := path.NewEgHeader(buf[:path.EgHeaderLen])
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header, _ := path.NewEgHeader(buf[:path.EgHeaderLen], 1416)
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header.SetDst(mtypes.NodeID_SuperNode)
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header.SetPacketLength(uint16(len(body)))
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header.SetSrc(mtypes.NodeID_SuperNode)
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@ -499,7 +499,7 @@ func PushPeerinfo(force bool) {
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return
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}
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buf := make([]byte, path.EgHeaderLen+len(body))
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header, _ := path.NewEgHeader(buf[:path.EgHeaderLen])
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header, _ := path.NewEgHeader(buf[:path.EgHeaderLen], 1416)
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header.SetDst(mtypes.NodeID_SuperNode)
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header.SetPacketLength(uint16(len(body)))
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header.SetSrc(mtypes.NodeID_SuperNode)
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@ -541,7 +541,7 @@ func PushServerParams(force bool) {
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return
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}
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buf := make([]byte, path.EgHeaderLen+len(body))
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header, _ := path.NewEgHeader(buf[:path.EgHeaderLen])
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header, _ := path.NewEgHeader(buf[:path.EgHeaderLen], 1416)
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header.SetDst(mtypes.NodeID_SuperNode)
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header.SetPacketLength(uint16(len(body)))
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header.SetSrc(mtypes.NodeID_SuperNode)
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@ -73,7 +73,7 @@ type InterfaceConf struct {
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IPv4CIDR string `yaml:"IPv4CIDR"`
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IPv6CIDR string `yaml:"IPv6CIDR"`
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IPv6LLPrefix string `yaml:"IPv6LLPrefix"`
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MTU int `yaml:"MTU"`
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MTU uint16 `yaml:"MTU"`
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RecvAddr string `yaml:"RecvAddr"`
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SendAddr string `yaml:"SendAddr"`
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L2HeaderMode string `yaml:"L2HeaderMode"`
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@ -93,3 +93,10 @@ func ReadYaml(filePath string, out interface{}) (err error) {
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err = yaml.Unmarshal(yamlFile, out)
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return
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}
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func AbsInt(a int) int {
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if a < 0 {
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a *= -1
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}
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return a
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}
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@ -90,7 +90,7 @@ func (v Usage) IsControl_Edge2Edge() bool {
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}
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}
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func NewEgHeader(pac []byte) (e EgHeader, err error) {
|
||||
func NewEgHeader(pac []byte, mtu uint16) (e EgHeader, err error) {
|
||||
if len(pac) != EgHeaderLen {
|
||||
err = errors.New("invalid packet size")
|
||||
return
|
||||
@ -120,8 +120,9 @@ func (e EgHeader) SetTTL(ttl uint8) {
|
||||
e.buf[4] = ttl
|
||||
}
|
||||
|
||||
func (e EgHeader) GetPacketLength() uint16 {
|
||||
return binary.BigEndian.Uint16(e.buf[5:7])
|
||||
func (e EgHeader) GetPacketLength() (ret uint16) {
|
||||
ret = binary.BigEndian.Uint16(e.buf[5:7])
|
||||
return
|
||||
}
|
||||
func (e EgHeader) SetPacketLength(length uint16) {
|
||||
binary.BigEndian.PutUint16(e.buf[5:7], length)
|
||||
|
@ -334,7 +334,7 @@ func getIFIndex(name string) (ret int32, err error) {
|
||||
return *(*int32)(unsafe.Pointer(&ifr[unix.IFNAMSIZ])), nil
|
||||
}
|
||||
|
||||
func (tap *NativeTap) setMTU(n int) (err error) {
|
||||
func (tap *NativeTap) setMTU(n uint16) (err error) {
|
||||
name, err := tap.Name()
|
||||
if err != nil {
|
||||
return err
|
||||
|
@ -133,7 +133,7 @@ func CreateVppTAP(iconfig mtypes.InterfaceConf, NodeID mtypes.Vertex, loglevel s
|
||||
|
||||
tap := &VppTap{
|
||||
name: iconfig.Name,
|
||||
mtu: iconfig.MTU,
|
||||
mtu: int(iconfig.MTU),
|
||||
ifuid: iconfig.VPPIFaceID,
|
||||
SwIfIndex: 0,
|
||||
memifSockPath: path.Join(vppMemifSocketDir, iconfig.Name+".sock"),
|
||||
|
Loading…
Reference in New Issue
Block a user