mirror of
https://github.com/apernet/OpenGFW.git
synced 2024-11-14 14:29:22 +08:00
refactor: merge openvpn_tcp and openvpn_udp to openvpn
This commit is contained in:
KujouRinka
parent
2232b553b3
commit
0e2ee36865
@ -1,44 +0,0 @@
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package internal
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// Ref paper:
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// https://www.usenix.org/system/files/sec22fall_xue-diwen.pdf
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// OpenVPN Opcodes definitions from:
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// https://github.com/OpenVPN/openvpn/blob/master/src/openvpn/ssl_pkt.h
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const (
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OpenVpnControlHardResetClientV1 = 1
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OpenVpnControlHardResetServerV1 = 2
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OpenVpnControlSoftResetV1 = 3
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OpenVpnControlV1 = 4
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OpenVpnAckV1 = 5
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OpenVpnDataV1 = 6
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OpenVpnControlHardResetClientV2 = 7
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OpenVpnControlHardResetServerV2 = 8
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OpenVpnDataV2 = 9
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OpenVpnControlHardResetClientV3 = 10
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OpenVpnControlWkcV1 = 11
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)
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const (
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OpenVpnMinPktLen = 6
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OpenVpnTcpPktDefaultLimit = 256
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OpenVpnUdpPktDefaultLimit = 256
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)
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func OpenVpnCheckForValidOpcode(opcode byte) bool {
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switch opcode {
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case OpenVpnControlHardResetClientV1,
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OpenVpnControlHardResetServerV1,
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OpenVpnControlSoftResetV1,
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OpenVpnControlV1,
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OpenVpnAckV1,
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OpenVpnDataV1,
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OpenVpnControlHardResetClientV2,
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OpenVpnControlHardResetServerV2,
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OpenVpnDataV2,
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OpenVpnControlHardResetClientV3,
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OpenVpnControlWkcV1:
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return true
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}
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return false
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}
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@ -1,234 +0,0 @@
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package tcp
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import (
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"github.com/apernet/OpenGFW/analyzer"
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"github.com/apernet/OpenGFW/analyzer/internal"
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"github.com/apernet/OpenGFW/analyzer/utils"
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)
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var _ analyzer.TCPAnalyzer = (*OpenVpnAnalyzer)(nil)
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var _ analyzer.TCPStream = (*openVpnStream)(nil)
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type OpenVpnAnalyzer struct{}
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func (a *OpenVpnAnalyzer) Name() string {
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return "openvpn_tcp"
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}
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func (a *OpenVpnAnalyzer) Limit() int {
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return 0
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}
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func (a *OpenVpnAnalyzer) NewTCP(info analyzer.TCPInfo, logger analyzer.Logger) analyzer.TCPStream {
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return newOpenVpnTcpStream(logger)
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}
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type openVpnStream struct {
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logger analyzer.Logger
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reqBuf *utils.ByteBuffer
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reqUpdated bool
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reqLSM *utils.LinearStateMachine
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reqDone bool
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respBuf *utils.ByteBuffer
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respUpdated bool
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respLSM *utils.LinearStateMachine
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respDone bool
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rxPktCnt int
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txPktCnt int
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pktLimit int
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lastOpcode byte
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}
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type openVpnTcpPkt struct {
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pktLen uint16
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opcode byte // 5 bits
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_keyId byte // 3 bits, not used
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// We don't care about the rest of the packet
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// payload []byte
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}
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func newOpenVpnTcpStream(logger analyzer.Logger) *openVpnStream {
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s := &openVpnStream{
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logger: logger,
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reqBuf: &utils.ByteBuffer{},
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respBuf: &utils.ByteBuffer{},
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pktLimit: internal.OpenVpnTcpPktDefaultLimit,
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}
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s.reqLSM = utils.NewLinearStateMachine(
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s.parseCtlHardResetClient,
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s.parseReq,
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)
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s.respLSM = utils.NewLinearStateMachine(
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s.parseCtlHardResetServer,
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s.parseResp,
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)
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return s
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}
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func (o *openVpnStream) Feed(rev, start, end bool, skip int, data []byte) (u *analyzer.PropUpdate, d bool) {
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if skip != 0 {
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return nil, true
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}
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if len(data) == 0 {
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return nil, false
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}
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var update *analyzer.PropUpdate
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var cancelled bool
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if rev {
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o.respBuf.Append(data)
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o.respUpdated = false
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cancelled, o.respDone = o.respLSM.Run()
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if o.respUpdated {
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update = &analyzer.PropUpdate{
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Type: analyzer.PropUpdateMerge,
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M: analyzer.PropMap{"rx_pkt_cnt": o.rxPktCnt},
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}
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o.respUpdated = false
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}
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} else {
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o.reqBuf.Append(data)
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o.reqUpdated = false
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cancelled, o.reqDone = o.reqLSM.Run()
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if o.reqUpdated {
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update = &analyzer.PropUpdate{
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Type: analyzer.PropUpdateMerge,
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M: analyzer.PropMap{"tx_pkt_cnt": o.txPktCnt},
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}
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o.reqUpdated = false
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}
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}
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return update, cancelled || (o.reqDone && o.respDone) || o.rxPktCnt+o.txPktCnt > o.pktLimit
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}
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func (o *openVpnStream) Close(limited bool) *analyzer.PropUpdate {
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o.reqBuf.Reset()
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o.respBuf.Reset()
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return nil
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}
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func (o *openVpnStream) parseCtlHardResetClient() utils.LSMAction {
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pkt, action := o.parsePkt(false)
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if action != utils.LSMActionNext {
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return action
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}
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if pkt.opcode != internal.OpenVpnControlHardResetClientV1 &&
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pkt.opcode != internal.OpenVpnControlHardResetClientV2 &&
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pkt.opcode != internal.OpenVpnControlHardResetClientV3 {
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return utils.LSMActionCancel
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}
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o.lastOpcode = pkt.opcode
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return utils.LSMActionNext
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}
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func (o *openVpnStream) parseCtlHardResetServer() utils.LSMAction {
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if o.lastOpcode != internal.OpenVpnControlHardResetClientV1 &&
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o.lastOpcode != internal.OpenVpnControlHardResetClientV2 &&
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o.lastOpcode != internal.OpenVpnControlHardResetClientV3 {
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return utils.LSMActionCancel
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}
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pkt, action := o.parsePkt(true)
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if action != utils.LSMActionNext {
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return action
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}
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if pkt.opcode != internal.OpenVpnControlHardResetServerV1 &&
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pkt.opcode != internal.OpenVpnControlHardResetServerV2 {
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return utils.LSMActionCancel
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}
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o.lastOpcode = pkt.opcode
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return utils.LSMActionNext
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}
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func (o *openVpnStream) parseReq() utils.LSMAction {
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pkt, action := o.parsePkt(false)
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if action != utils.LSMActionNext {
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return action
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}
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if pkt.opcode != internal.OpenVpnControlSoftResetV1 &&
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pkt.opcode != internal.OpenVpnControlV1 &&
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pkt.opcode != internal.OpenVpnAckV1 &&
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pkt.opcode != internal.OpenVpnDataV1 &&
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pkt.opcode != internal.OpenVpnDataV2 &&
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pkt.opcode != internal.OpenVpnControlWkcV1 {
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return utils.LSMActionCancel
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}
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o.txPktCnt += 1
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o.reqUpdated = true
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return utils.LSMActionPause
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}
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func (o *openVpnStream) parseResp() utils.LSMAction {
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pkt, action := o.parsePkt(true)
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if action != utils.LSMActionNext {
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return action
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}
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if pkt.opcode != internal.OpenVpnControlSoftResetV1 &&
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pkt.opcode != internal.OpenVpnControlV1 &&
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pkt.opcode != internal.OpenVpnAckV1 &&
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pkt.opcode != internal.OpenVpnDataV1 &&
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pkt.opcode != internal.OpenVpnDataV2 &&
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pkt.opcode != internal.OpenVpnControlWkcV1 {
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return utils.LSMActionCancel
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}
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o.rxPktCnt += 1
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o.respUpdated = true
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return utils.LSMActionPause
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}
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// Parse OpenVpn packet header but not consume buffer.
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func (o *openVpnStream) parsePkt(rev bool) (p *openVpnTcpPkt, action utils.LSMAction) {
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var buffer *utils.ByteBuffer
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if rev {
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buffer = o.respBuf
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} else {
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buffer = o.reqBuf
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}
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// Parse packet length
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pktLen, ok := buffer.GetUint16(false, false)
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if !ok {
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return nil, utils.LSMActionPause
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}
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if pktLen < internal.OpenVpnMinPktLen {
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return nil, utils.LSMActionCancel
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}
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pktOp, ok := buffer.Get(3, false)
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if !ok {
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return nil, utils.LSMActionPause
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}
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if !internal.OpenVpnCheckForValidOpcode(pktOp[2] >> 3) {
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return nil, utils.LSMActionCancel
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}
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pkt, ok := buffer.Get(int(pktLen)+2, true)
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if !ok {
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return nil, utils.LSMActionPause
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}
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pkt = pkt[2:]
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// Parse packet header
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p = &openVpnTcpPkt{}
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p.pktLen = pktLen
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p.opcode = pkt[0] >> 3
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p._keyId = pkt[0] & 0x07
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return p, utils.LSMActionNext
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}
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@ -2,17 +2,44 @@ package udp
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import (
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"github.com/apernet/OpenGFW/analyzer"
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"github.com/apernet/OpenGFW/analyzer/internal"
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"github.com/apernet/OpenGFW/analyzer/utils"
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)
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var _ analyzer.UDPAnalyzer = (*OpenVpnAnalyzer)(nil)
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var _ analyzer.UDPStream = (*openVpnStream)(nil)
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var _ analyzer.TCPAnalyzer = (*OpenVpnAnalyzer)(nil)
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var _ analyzer.UDPStream = (*openVpnUdpStream)(nil)
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var _ analyzer.TCPStream = (*openVpnTcpStream)(nil)
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// Ref paper:
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// https://www.usenix.org/system/files/sec22fall_xue-diwen.pdf
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// OpenVPN Opcodes definitions from:
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// https://github.com/OpenVPN/openvpn/blob/master/src/openvpn/ssl_pkt.h
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const (
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OpenVpnControlHardResetClientV1 = 1
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OpenVpnControlHardResetServerV1 = 2
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OpenVpnControlSoftResetV1 = 3
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OpenVpnControlV1 = 4
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OpenVpnAckV1 = 5
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OpenVpnDataV1 = 6
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OpenVpnControlHardResetClientV2 = 7
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OpenVpnControlHardResetServerV2 = 8
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OpenVpnDataV2 = 9
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OpenVpnControlHardResetClientV3 = 10
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OpenVpnControlWkcV1 = 11
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)
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const (
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OpenVpnMinPktLen = 6
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OpenVpnTcpPktDefaultLimit = 256
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OpenVpnUdpPktDefaultLimit = 256
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)
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type OpenVpnAnalyzer struct{}
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func (a *OpenVpnAnalyzer) Name() string {
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return "openvpn_udp"
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return "openvpn"
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}
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func (a *OpenVpnAnalyzer) Limit() int {
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@ -20,15 +47,24 @@ func (a *OpenVpnAnalyzer) Limit() int {
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}
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func (a *OpenVpnAnalyzer) NewUDP(info analyzer.UDPInfo, logger analyzer.Logger) analyzer.UDPStream {
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return newOpenVPNUdpStream(logger)
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return newOpenVpnUdpStream(logger)
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}
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func (a *OpenVpnAnalyzer) NewTCP(info analyzer.TCPInfo, logger analyzer.Logger) analyzer.TCPStream {
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return newOpenVpnTcpStream(logger)
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}
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type openVpnPkt struct {
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pktLen uint16 // 16 bits, TCP proto only
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opcode byte // 5 bits
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_keyId byte // 3 bits, not used
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// We don't care about the rest of the packet
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// payload []byte
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}
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type openVpnStream struct {
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logger analyzer.Logger
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// We don't introduce `invalidCount` here to decrease the false positive rate
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// invalidCount int
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curPkt []byte
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reqUpdated bool
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reqLSM *utils.LinearStateMachine
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@ -42,22 +78,107 @@ type openVpnStream struct {
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txPktCnt int
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pktLimit int
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reqPktParse func() (*openVpnPkt, utils.LSMAction)
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respPktParse func() (*openVpnPkt, utils.LSMAction)
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lastOpcode byte
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}
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type openVpnUdpPkt struct {
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opcode byte // 5 bits
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_keyId byte // 3 bits, not used
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func (o *openVpnStream) parseCtlHardResetClient() utils.LSMAction {
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pkt, action := o.reqPktParse()
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if action != utils.LSMActionNext {
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return action
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}
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// We don't care about the rest of the packet
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// payload []byte
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if pkt.opcode != OpenVpnControlHardResetClientV1 &&
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pkt.opcode != OpenVpnControlHardResetClientV2 &&
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pkt.opcode != OpenVpnControlHardResetClientV3 {
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return utils.LSMActionCancel
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}
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o.lastOpcode = pkt.opcode
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return utils.LSMActionNext
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}
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func newOpenVPNUdpStream(logger analyzer.Logger) *openVpnStream {
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s := &openVpnStream{
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logger: logger,
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pktLimit: internal.OpenVpnUdpPktDefaultLimit,
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func (o *openVpnStream) parseCtlHardResetServer() utils.LSMAction {
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if o.lastOpcode != OpenVpnControlHardResetClientV1 &&
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o.lastOpcode != OpenVpnControlHardResetClientV2 &&
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o.lastOpcode != OpenVpnControlHardResetClientV3 {
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return utils.LSMActionCancel
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}
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pkt, action := o.respPktParse()
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if action != utils.LSMActionNext {
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return action
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}
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if pkt.opcode != OpenVpnControlHardResetServerV1 &&
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pkt.opcode != OpenVpnControlHardResetServerV2 {
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return utils.LSMActionCancel
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}
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o.lastOpcode = pkt.opcode
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return utils.LSMActionNext
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}
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func (o *openVpnStream) parseReq() utils.LSMAction {
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pkt, action := o.reqPktParse()
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if action != utils.LSMActionNext {
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return action
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}
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if pkt.opcode != OpenVpnControlSoftResetV1 &&
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pkt.opcode != OpenVpnControlV1 &&
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pkt.opcode != OpenVpnAckV1 &&
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pkt.opcode != OpenVpnDataV1 &&
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pkt.opcode != OpenVpnDataV2 &&
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pkt.opcode != OpenVpnControlWkcV1 {
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return utils.LSMActionCancel
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}
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o.txPktCnt += 1
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o.reqUpdated = true
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return utils.LSMActionPause
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}
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func (o *openVpnStream) parseResp() utils.LSMAction {
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pkt, action := o.respPktParse()
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if action != utils.LSMActionNext {
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return action
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}
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if pkt.opcode != OpenVpnControlSoftResetV1 &&
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pkt.opcode != OpenVpnControlV1 &&
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pkt.opcode != OpenVpnAckV1 &&
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pkt.opcode != OpenVpnDataV1 &&
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pkt.opcode != OpenVpnDataV2 &&
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pkt.opcode != OpenVpnControlWkcV1 {
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return utils.LSMActionCancel
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}
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o.rxPktCnt += 1
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o.respUpdated = true
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return utils.LSMActionPause
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}
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type openVpnUdpStream struct {
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openVpnStream
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curPkt []byte
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// We don't introduce `invalidCount` here to decrease the false positive rate
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// invalidCount int
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}
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func newOpenVpnUdpStream(logger analyzer.Logger) *openVpnUdpStream {
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s := &openVpnUdpStream{
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openVpnStream: openVpnStream{
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logger: logger,
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pktLimit: OpenVpnUdpPktDefaultLimit,
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},
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}
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s.respPktParse = s.parsePkt
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s.reqPktParse = s.parsePkt
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s.reqLSM = utils.NewLinearStateMachine(
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s.parseCtlHardResetClient,
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s.parseReq,
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@ -69,7 +190,7 @@ func newOpenVPNUdpStream(logger analyzer.Logger) *openVpnStream {
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return s
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}
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func (o *openVpnStream) Feed(rev bool, data []byte) (u *analyzer.PropUpdate, d bool) {
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func (o *openVpnUdpStream) Feed(rev bool, data []byte) (u *analyzer.PropUpdate, d bool) {
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if len(data) == 0 {
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return nil, false
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}
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@ -101,105 +222,159 @@ func (o *openVpnStream) Feed(rev bool, data []byte) (u *analyzer.PropUpdate, d b
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return update, cancelled || (o.reqDone && o.respDone) || o.rxPktCnt+o.txPktCnt > o.pktLimit
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}
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|
||||
func (o *openVpnStream) Close(limited bool) *analyzer.PropUpdate {
|
||||
func (o *openVpnUdpStream) Close(limited bool) *analyzer.PropUpdate {
|
||||
return nil
|
||||
}
|
||||
|
||||
func (o *openVpnStream) parseCtlHardResetClient() utils.LSMAction {
|
||||
pkt, action := o.parsePkt()
|
||||
if action != utils.LSMActionNext {
|
||||
return action
|
||||
}
|
||||
|
||||
if pkt.opcode != internal.OpenVpnControlHardResetClientV1 &&
|
||||
pkt.opcode != internal.OpenVpnControlHardResetClientV2 &&
|
||||
pkt.opcode != internal.OpenVpnControlHardResetClientV3 {
|
||||
return utils.LSMActionCancel
|
||||
}
|
||||
o.lastOpcode = pkt.opcode
|
||||
|
||||
return utils.LSMActionNext
|
||||
}
|
||||
|
||||
func (o *openVpnStream) parseCtlHardResetServer() utils.LSMAction {
|
||||
|
||||
if o.lastOpcode != internal.OpenVpnControlHardResetClientV1 &&
|
||||
o.lastOpcode != internal.OpenVpnControlHardResetClientV2 &&
|
||||
o.lastOpcode != internal.OpenVpnControlHardResetClientV3 {
|
||||
return utils.LSMActionCancel
|
||||
}
|
||||
|
||||
pkt, action := o.parsePkt()
|
||||
if action != utils.LSMActionNext {
|
||||
return action
|
||||
}
|
||||
|
||||
if pkt.opcode != internal.OpenVpnControlHardResetServerV1 &&
|
||||
pkt.opcode != internal.OpenVpnControlHardResetServerV2 {
|
||||
return utils.LSMActionCancel
|
||||
}
|
||||
o.lastOpcode = pkt.opcode
|
||||
|
||||
return utils.LSMActionNext
|
||||
}
|
||||
|
||||
func (o *openVpnStream) parseReq() utils.LSMAction {
|
||||
pkt, action := o.parsePkt()
|
||||
if action != utils.LSMActionNext {
|
||||
return action
|
||||
}
|
||||
|
||||
if pkt.opcode != internal.OpenVpnControlSoftResetV1 &&
|
||||
pkt.opcode != internal.OpenVpnControlV1 &&
|
||||
pkt.opcode != internal.OpenVpnAckV1 &&
|
||||
pkt.opcode != internal.OpenVpnDataV1 &&
|
||||
pkt.opcode != internal.OpenVpnDataV2 &&
|
||||
pkt.opcode != internal.OpenVpnControlWkcV1 {
|
||||
return utils.LSMActionCancel
|
||||
}
|
||||
|
||||
o.txPktCnt += 1
|
||||
o.reqUpdated = true
|
||||
|
||||
return utils.LSMActionPause
|
||||
}
|
||||
|
||||
func (o *openVpnStream) parseResp() utils.LSMAction {
|
||||
pkt, action := o.parsePkt()
|
||||
if action != utils.LSMActionNext {
|
||||
return action
|
||||
}
|
||||
|
||||
if pkt.opcode != internal.OpenVpnControlSoftResetV1 &&
|
||||
pkt.opcode != internal.OpenVpnControlV1 &&
|
||||
pkt.opcode != internal.OpenVpnAckV1 &&
|
||||
pkt.opcode != internal.OpenVpnDataV1 &&
|
||||
pkt.opcode != internal.OpenVpnDataV2 &&
|
||||
pkt.opcode != internal.OpenVpnControlWkcV1 {
|
||||
return utils.LSMActionCancel
|
||||
}
|
||||
|
||||
o.rxPktCnt += 1
|
||||
o.respUpdated = true
|
||||
|
||||
return utils.LSMActionPause
|
||||
}
|
||||
|
||||
// Parse OpenVpn packet header but not consume buffer.
|
||||
func (o *openVpnStream) parsePkt() (p *openVpnUdpPkt, action utils.LSMAction) {
|
||||
// Parse OpenVpn UDP packet.
|
||||
func (o *openVpnUdpStream) parsePkt() (p *openVpnPkt, action utils.LSMAction) {
|
||||
if o.curPkt == nil {
|
||||
return nil, utils.LSMActionPause
|
||||
}
|
||||
|
||||
if !internal.OpenVpnCheckForValidOpcode(o.curPkt[0] >> 3) {
|
||||
if !OpenVpnCheckForValidOpcode(o.curPkt[0] >> 3) {
|
||||
return nil, utils.LSMActionCancel
|
||||
}
|
||||
|
||||
// Parse packet header
|
||||
p = &openVpnUdpPkt{}
|
||||
p = &openVpnPkt{}
|
||||
p.opcode = o.curPkt[0] >> 3
|
||||
p._keyId = o.curPkt[0] & 0x07
|
||||
|
||||
o.curPkt = nil
|
||||
return p, utils.LSMActionNext
|
||||
}
|
||||
|
||||
type openVpnTcpStream struct {
|
||||
openVpnStream
|
||||
reqBuf *utils.ByteBuffer
|
||||
respBuf *utils.ByteBuffer
|
||||
}
|
||||
|
||||
func newOpenVpnTcpStream(logger analyzer.Logger) *openVpnTcpStream {
|
||||
s := &openVpnTcpStream{
|
||||
openVpnStream: openVpnStream{
|
||||
logger: logger,
|
||||
pktLimit: OpenVpnTcpPktDefaultLimit,
|
||||
},
|
||||
reqBuf: &utils.ByteBuffer{},
|
||||
respBuf: &utils.ByteBuffer{},
|
||||
}
|
||||
s.respPktParse = func() (*openVpnPkt, utils.LSMAction) {
|
||||
return s.parsePkt(true)
|
||||
}
|
||||
s.reqPktParse = func() (*openVpnPkt, utils.LSMAction) {
|
||||
return s.parsePkt(false)
|
||||
}
|
||||
s.reqLSM = utils.NewLinearStateMachine(
|
||||
s.parseCtlHardResetClient,
|
||||
s.parseReq,
|
||||
)
|
||||
s.respLSM = utils.NewLinearStateMachine(
|
||||
s.parseCtlHardResetServer,
|
||||
s.parseResp,
|
||||
)
|
||||
return s
|
||||
}
|
||||
|
||||
func (o *openVpnTcpStream) Feed(rev, start, end bool, skip int, data []byte) (u *analyzer.PropUpdate, d bool) {
|
||||
if skip != 0 {
|
||||
return nil, true
|
||||
}
|
||||
if len(data) == 0 {
|
||||
return nil, false
|
||||
}
|
||||
var update *analyzer.PropUpdate
|
||||
var cancelled bool
|
||||
if rev {
|
||||
o.respBuf.Append(data)
|
||||
o.respUpdated = false
|
||||
cancelled, o.respDone = o.respLSM.Run()
|
||||
if o.respUpdated {
|
||||
update = &analyzer.PropUpdate{
|
||||
Type: analyzer.PropUpdateMerge,
|
||||
M: analyzer.PropMap{"rx_pkt_cnt": o.rxPktCnt},
|
||||
}
|
||||
o.respUpdated = false
|
||||
}
|
||||
} else {
|
||||
o.reqBuf.Append(data)
|
||||
o.reqUpdated = false
|
||||
cancelled, o.reqDone = o.reqLSM.Run()
|
||||
if o.reqUpdated {
|
||||
update = &analyzer.PropUpdate{
|
||||
Type: analyzer.PropUpdateMerge,
|
||||
M: analyzer.PropMap{"tx_pkt_cnt": o.txPktCnt},
|
||||
}
|
||||
o.reqUpdated = false
|
||||
}
|
||||
}
|
||||
|
||||
return update, cancelled || (o.reqDone && o.respDone) || o.rxPktCnt+o.txPktCnt > o.pktLimit
|
||||
}
|
||||
|
||||
func (o *openVpnTcpStream) Close(limited bool) *analyzer.PropUpdate {
|
||||
o.reqBuf.Reset()
|
||||
o.respBuf.Reset()
|
||||
return nil
|
||||
}
|
||||
|
||||
// Parse OpenVpn TCP packet.
|
||||
func (o *openVpnTcpStream) parsePkt(rev bool) (p *openVpnPkt, action utils.LSMAction) {
|
||||
var buffer *utils.ByteBuffer
|
||||
if rev {
|
||||
buffer = o.respBuf
|
||||
} else {
|
||||
buffer = o.reqBuf
|
||||
}
|
||||
|
||||
// Parse packet length
|
||||
pktLen, ok := buffer.GetUint16(false, false)
|
||||
if !ok {
|
||||
return nil, utils.LSMActionPause
|
||||
}
|
||||
|
||||
if pktLen < OpenVpnMinPktLen {
|
||||
return nil, utils.LSMActionCancel
|
||||
}
|
||||
|
||||
pktOp, ok := buffer.Get(3, false)
|
||||
if !ok {
|
||||
return nil, utils.LSMActionPause
|
||||
}
|
||||
if !OpenVpnCheckForValidOpcode(pktOp[2] >> 3) {
|
||||
return nil, utils.LSMActionCancel
|
||||
}
|
||||
|
||||
pkt, ok := buffer.Get(int(pktLen)+2, true)
|
||||
if !ok {
|
||||
return nil, utils.LSMActionPause
|
||||
}
|
||||
pkt = pkt[2:]
|
||||
|
||||
// Parse packet header
|
||||
p = &openVpnPkt{}
|
||||
p.pktLen = pktLen
|
||||
p.opcode = pkt[0] >> 3
|
||||
p._keyId = pkt[0] & 0x07
|
||||
|
||||
return p, utils.LSMActionNext
|
||||
}
|
||||
|
||||
func OpenVpnCheckForValidOpcode(opcode byte) bool {
|
||||
switch opcode {
|
||||
case OpenVpnControlHardResetClientV1,
|
||||
OpenVpnControlHardResetServerV1,
|
||||
OpenVpnControlSoftResetV1,
|
||||
OpenVpnControlV1,
|
||||
OpenVpnAckV1,
|
||||
OpenVpnDataV1,
|
||||
OpenVpnControlHardResetClientV2,
|
||||
OpenVpnControlHardResetServerV2,
|
||||
OpenVpnDataV2,
|
||||
OpenVpnControlHardResetClientV3,
|
||||
OpenVpnControlWkcV1:
|
||||
return true
|
||||
}
|
||||
return false
|
||||
}
|
||||
|
||||
@ -87,7 +87,6 @@ var logFormatMap = map[string]zapcore.EncoderConfig{
|
||||
var analyzers = []analyzer.Analyzer{
|
||||
&tcp.FETAnalyzer{},
|
||||
&tcp.HTTPAnalyzer{},
|
||||
&tcp.OpenVpnAnalyzer{},
|
||||
&tcp.SocksAnalyzer{},
|
||||
&tcp.SSHAnalyzer{},
|
||||
&tcp.TLSAnalyzer{},
|
||||
|
||||
Loading…
Reference in New Issue
Block a user