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Code Issues Releases Wiki Activity

Tunnels working again to basic level w/o re-connect or re-dial

This commit is contained in:
Russ Magee 2018-11-01 18:52:01 -07:00
parent 081d88b9ad
commit a425afe9b6
4 changed files with 270 additions and 240 deletions
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99
hkexnet/hkexnet.go
View File

@ -532,7 +532,7 @@ func (hc *Conn) Close() (err error) {
log.Printf("** Writing closeStat %d at Close()\n", *hc.closeStat) log.Printf("** Writing closeStat %d at Close()\n", *hc.closeStat)
hc.WritePacket(s, CSOExitStatus) hc.WritePacket(s, CSOExitStatus)
err = (*hc.c).Close() err = (*hc.c).Close()
logger.LogNotice(fmt.Sprintln("[Conn Closing]")) logger.LogDebug(fmt.Sprintln("[Conn Closing]"))
return return
} }
@ -602,7 +602,7 @@ func Listen(protocol string, ipport string) (hl HKExListener, e error) {
if err != nil { if err != nil {
return HKExListener{nil}, err return HKExListener{nil}, err
} }
logger.LogNotice(fmt.Sprintf("[Listening on %s]\n", ipport)) logger.LogDebug(fmt.Sprintf("[Listening on %s]\n", ipport))
hl.l = l hl.l = l
return return
} }
@ -612,7 +612,7 @@ func Listen(protocol string, ipport string) (hl HKExListener, e error) {
// //
// See go doc net.Listener.Close // See go doc net.Listener.Close
func (hl HKExListener) Close() error { func (hl HKExListener) Close() error {
logger.LogNotice(fmt.Sprintln("[Listener Closed]")) logger.LogDebug(fmt.Sprintln("[Listener Closed]"))
return hl.l.Close() return hl.l.Close()
} }
@ -632,7 +632,7 @@ func (hl *HKExListener) Accept() (hc Conn, err error) {
if err != nil { if err != nil {
return Conn{}, err return Conn{}, err
} }
logger.LogNotice(fmt.Sprintln("[net.Listener Accepted]")) logger.LogDebug(fmt.Sprintln("[net.Listener Accepted]"))
// Read KEx alg proposed by client // Read KEx alg proposed by client
var kexAlg KEXAlg var kexAlg KEXAlg
@ -701,11 +701,11 @@ func (hc Conn) Read(b []byte) (n int, err error) {
return 0, io.EOF return 0, io.EOF
} }
if strings.HasSuffix(err.Error(), "use of closed network connection") { if strings.HasSuffix(err.Error(), "use of closed network connection") {
logger.LogNotice(fmt.Sprintln("[Client hung up]")) logger.LogDebug(fmt.Sprintln("[Client hung up]"))
return 0, io.EOF return 0, io.EOF
} }
etxt := fmt.Sprintf("** Failed read:%s (%s) **", "ctrlStatOp", err) etxt := fmt.Sprintf("** Failed read:%s (%s) **", "ctrlStatOp", err)
logger.LogErr(etxt) logger.LogDebug(etxt)
return 0, errors.New(etxt) return 0, errors.New(etxt)
} }
log.Printf("[ctrlStatOp: %v]\n", ctrlStatOp) log.Printf("[ctrlStatOp: %v]\n", ctrlStatOp)
@ -722,11 +722,11 @@ func (hc Conn) Read(b []byte) (n int, err error) {
return 0, io.EOF return 0, io.EOF
} }
if strings.HasSuffix(err.Error(), "use of closed network connection") { if strings.HasSuffix(err.Error(), "use of closed network connection") {
logger.LogNotice(fmt.Sprintln("[Client hung up]")) logger.LogDebug(fmt.Sprintln("[Client hung up]"))
return 0, io.EOF return 0, io.EOF
} }
etxt := fmt.Sprintf("** Failed read:%s (%s) **", "HMAC", err) etxt := fmt.Sprintf("** Failed read:%s (%s) **", "HMAC", err)
logger.LogErr(etxt) logger.LogDebug(etxt)
return 0, errors.New(etxt) return 0, errors.New(etxt)
} }
@ -736,16 +736,16 @@ func (hc Conn) Read(b []byte) (n int, err error) {
return 0, io.EOF return 0, io.EOF
} }
if strings.HasSuffix(err.Error(), "use of closed network connection") { if strings.HasSuffix(err.Error(), "use of closed network connection") {
logger.LogNotice(fmt.Sprintln("[Client hung up]")) logger.LogDebug(fmt.Sprintln("[Client hung up]"))
return 0, io.EOF return 0, io.EOF
} }
etxt := fmt.Sprintf("** Failed read:%s (%s) **", "payloadLen", err) etxt := fmt.Sprintf("** Failed read:%s (%s) **", "payloadLen", err)
logger.LogErr(etxt) logger.LogDebug(etxt)
return 0, errors.New(etxt) return 0, errors.New(etxt)
} }
if payloadLen > MAX_PAYLOAD_LEN { if payloadLen > MAX_PAYLOAD_LEN {
logger.LogErr(fmt.Sprintf("[Insane payloadLen:%v]\n", payloadLen)) logger.LogDebug(fmt.Sprintf("[Insane payloadLen:%v]\n", payloadLen))
hc.Close() hc.Close()
return 1, errors.New("Insane payloadLen") return 1, errors.New("Insane payloadLen")
} }
@ -757,11 +757,11 @@ func (hc Conn) Read(b []byte) (n int, err error) {
return 0, io.EOF return 0, io.EOF
} }
if strings.HasSuffix(err.Error(), "use of closed network connection") { if strings.HasSuffix(err.Error(), "use of closed network connection") {
logger.LogNotice(fmt.Sprintln("[Client hung up]")) logger.LogDebug(fmt.Sprintln("[Client hung up]"))
return 0, io.EOF return 0, io.EOF
} }
etxt := fmt.Sprintf("** Failed read:%s (%s) **", "payloadBytes", err) etxt := fmt.Sprintf("** Failed read:%s (%s) **", "payloadBytes", err)
logger.LogErr(etxt) logger.LogDebug(etxt)
return 0, errors.New(etxt) return 0, errors.New(etxt)
} }
@ -806,45 +806,57 @@ func (hc Conn) Read(b []byte) (n int, err error) {
if len(payloadBytes) > 0 { if len(payloadBytes) > 0 {
hc.SetStatus(CSOType(binary.BigEndian.Uint32(payloadBytes))) hc.SetStatus(CSOType(binary.BigEndian.Uint32(payloadBytes)))
} else { } else {
logger.LogErr(fmt.Sprintln("[truncated payload, cannot determine CSOExitStatus]")) logger.LogDebug(fmt.Sprintln("[truncated payload, cannot determine CSOExitStatus]"))
hc.SetStatus(CSETruncCSO) hc.SetStatus(CSETruncCSO)
} }
hc.Close() hc.Close()
} else if ctrlStatOp == CSOTunSetup { } else if ctrlStatOp == CSOTunSetup {
// server side tunnel setup in response to client // server side tunnel setup in response to client
lport := binary.BigEndian.Uint16(payloadBytes) lport := binary.BigEndian.Uint16(payloadBytes[0:2])
rport := binary.BigEndian.Uint16(payloadBytes[2:4]) rport := binary.BigEndian.Uint16(payloadBytes[2:4])
log.Printf("Tunnel setup [%d:%d]\r\n", lport, rport) logger.LogDebug(fmt.Sprintf("Read(): Tunnel setup [%d:%d]", lport, rport))
StartServerTunnel(&hc, lport, rport) hc.StartServerTunnel(lport, rport)
} else if ctrlStatOp == CSOTunSetupAck { } else if ctrlStatOp == CSOTunSetupAck {
// client side has received ack from server lport := binary.BigEndian.Uint16(payloadBytes[0:2])
lport := binary.BigEndian.Uint16(payloadBytes)
rport := binary.BigEndian.Uint16(payloadBytes[2:4]) rport := binary.BigEndian.Uint16(payloadBytes[2:4])
log.Printf("Tunnel ack [%d:%d]\r\n", lport, rport) logger.LogDebug(fmt.Sprintf("Read(): Tunnel setup ack [%d:%d]", lport, rport))
} else if ctrlStatOp == CSOTunData {
lport := binary.BigEndian.Uint16(payloadBytes)
rport := binary.BigEndian.Uint16(payloadBytes[2:4])
_ = lport
//fmt.Printf("[Got CSOTunData: [lport %d:rport %d] data:%v\n", lport, rport, payloadBytes[4:])
if hc.tuns[rport] == nil {
fmt.Printf("[Invalid rport:%d]\r\n", rport)
} else {
hc.tuns[rport].Data <- payloadBytes[4:]
}
} else {
hc.dBuf.Write(payloadBytes) hc.dBuf.Write(payloadBytes)
//log.Printf("hc.dBuf: %s\n", hex.Dump(hc.dBuf.Bytes())) } else if ctrlStatOp == CSOTunRefused {
// client side has been told nothing is listening on rport
lport := binary.BigEndian.Uint16(payloadBytes[0:2])
rport := binary.BigEndian.Uint16(payloadBytes[2:4])
logger.LogDebug(fmt.Sprintf("Read(): Tunnel refused [%d:%d]", lport, rport))
} else if ctrlStatOp == CSOTunDisconn {
// server side's rport has disconnected (server lost)
lport := binary.BigEndian.Uint16(payloadBytes[0:2])
rport := binary.BigEndian.Uint16(payloadBytes[2:4])
logger.LogDebug(fmt.Sprintf("Read(): Tunnel server disconnected [%d:%d]", lport, rport))
} else if ctrlStatOp == CSOTunHangup {
// client side's lport has hung up
lport := binary.BigEndian.Uint16(payloadBytes[0:2])
rport := binary.BigEndian.Uint16(payloadBytes[2:4])
logger.LogDebug(fmt.Sprintf("Read(): Tunnel client hung up [%d:%d]", lport, rport))
} else if ctrlStatOp == CSOTunData {
lport := binary.BigEndian.Uint16(payloadBytes[0:2])
rport := binary.BigEndian.Uint16(payloadBytes[2:4])
//fmt.Printf("[Got CSOTunData: [lport %d:rport %d] data:%v\n", lport, rport, payloadBytes[4:])
logger.LogDebug(fmt.Sprintf("[Writing data to rport [%d:%d] %v", lport, rport, payloadBytes[4:]))
hc.tuns[rport].Data <- payloadBytes[4:]
} else if ctrlStatOp == CSONone {
hc.dBuf.Write(payloadBytes)
} else {
logger.LogDebug(fmt.Sprintf("[Unknown CSOType:%d]", ctrlStatOp))
} }
hTmp := hc.rm.Sum(nil)[0:HMAC_CHK_SZ] hTmp := hc.rm.Sum(nil)[0:HMAC_CHK_SZ]
log.Printf("<%04x) HMAC:(i)%s (c)%02x\r\n", decryptN, hex.EncodeToString([]byte(hmacIn[0:])), hTmp) log.Printf("<%04x) HMAC:(i)%s (c)%02x\r\n", decryptN, hex.EncodeToString([]byte(hmacIn[0:])), hTmp)
if *hc.closeStat == CSETruncCSO { if *hc.closeStat == CSETruncCSO {
logger.LogErr(fmt.Sprintln("[cannot verify HMAC]")) logger.LogDebug(fmt.Sprintln("[cannot verify HMAC]"))
} else { } else {
// Log alert if hmac didn't match, corrupted channel // Log alert if hmac didn't match, corrupted channel
if !bytes.Equal(hTmp, []byte(hmacIn[0:])) /*|| hmacIn[0] > 0xf8*/ { if !bytes.Equal(hTmp, []byte(hmacIn[0:])) /*|| hmacIn[0] > 0xf8*/ {
logger.LogErr(fmt.Sprintln("** ALERT - detected HMAC mismatch, possible channel tampering **")) logger.LogDebug(fmt.Sprintln("** ALERT - detected HMAC mismatch, possible channel tampering **"))
_, _ = (*hc.c).Write([]byte{CSOHmacInvalid}) _, _ = (*hc.c).Write([]byte{CSOHmacInvalid})
} }
} }
@ -881,25 +893,6 @@ func (hc *Conn) WritePacket(b []byte, ctrlStatOp byte) (n int, err error) {
return 0, errors.New("Secure chan not ready for writing") return 0, errors.New("Secure chan not ready for writing")
} }
if ctrlStatOp == CSOTunSetup {
// Client-side tunnel setup
lport := binary.BigEndian.Uint16(b)
rport := binary.BigEndian.Uint16(b[2:4])
// spawn workers to listen for data and tunnel events
// via channel comms to hc.tuns[rport].tunCtl
StartClientTunnel(hc, lport, rport)
// CSOTunSetup is written through to server side,
// see hc.Read()
} else if ctrlStatOp == CSOTunSetupAck {
lport := binary.BigEndian.Uint16(b)
rport := binary.BigEndian.Uint16(b[2:4])
if lport == 0 || rport == 0 {
log.Printf("Responded with tunnel setup nak [%d:%d]\r\n", lport, rport)
} else {
log.Printf("Responded with tunnel setup ack [%d:%d]\r\n", lport, rport)
}
}
//Padding prior to encryption //Padding prior to encryption
padSz := (rand.Intn(PAD_SZ) / 2) + (PAD_SZ / 2) padSz := (rand.Intn(PAD_SZ) / 2) + (PAD_SZ / 2)
padLen := padSz - ((len(b) + padSz) % padSz) padLen := padSz - ((len(b) + padSz) % padSz)

124
hkexnet/hkextun.go
View File

@ -11,11 +11,11 @@ package hkexnet
import ( import (
"bytes" "bytes"
"encoding/binary" "encoding/binary"
//"fmt" "fmt"
//"io" "io"
//"log"
"net" "net"
//"blitter.com/go/hkexsh/logger"
"blitter.com/go/hkexsh/logger"
) )
type ( type (
@ -42,32 +42,48 @@ type (
Rport uint16 // Names are from client's perspective Rport uint16 // Names are from client's perspective
Lport uint16 // ... ie., RPort is on server, LPort is on client Lport uint16 // ... ie., RPort is on server, LPort is on client
Peer string //net.Addr Peer string //net.Addr
//Status byte //Last status of tunnel (eg., CSOTunSetupAck)
Ctl chan<- rune //See TunCtl_* consts Ctl chan<- rune //See TunCtl_* consts
Data chan []byte Data chan []byte
} }
TunPacket struct { //TunPacket struct {
n uint32 // n uint32
data []byte // data []byte
} //}
) )
func StartClientTunnel(hc *Conn, lport, rport uint16) { func (hc *Conn) InitTunEndpoint(lp uint16, p string /* net.Addr */, rp uint16) {
if hc.tuns == nil { if hc.tuns == nil {
hc.tuns = make(map[uint16]*TunEndpoint) hc.tuns = make(map[uint16]*TunEndpoint)
} }
if hc.tuns[rport] == nil { if hc.tuns[rp] == nil {
addrs, _ := net.InterfaceAddrs() var addrs []net.Addr
hc.tuns[rport] = &TunEndpoint{Peer: addrs[0].String(), if p == "" {
Lport: lport, Rport: rport, Ctl: make(chan<- rune)} addrs, _ = net.InterfaceAddrs()
p = addrs[0].String()
}
hc.tuns[rp] = &TunEndpoint{/*Status: CSOTunSetup,*/ Peer: p,
Lport: lp, Rport: rp, Data: make(chan[]byte, 32), Ctl: make(chan<- rune)}
logger.LogDebug(fmt.Sprintf("InitTunEndpoint [%d:%s:%d]\n", lp, p, rp))
}
return
} }
/* //func (hc *Conn) GetTunStatus(rp uint16) byte {
// return hc.tuns[rp].Status
//}
func (hc *Conn) StartClientTunnel(lport, rport uint16) {
hc.InitTunEndpoint(lport, "", rport)
t := hc.tuns[rport] // for convenience
go func() { go func() {
logger.LogDebug(fmt.Sprintf("Listening for client tunnel port %d", lport))
l, e := net.Listen("tcp", fmt.Sprintf(":%d", lport)) l, e := net.Listen("tcp", fmt.Sprintf(":%d", lport))
if e != nil { if e != nil {
fmt.Printf("[Could not get lport %d! (%s)\n", lport, e) logger.LogDebug(fmt.Sprintf("[Could not get lport %d! (%s)", lport, e))
} else { } else {
defer l.Close() defer l.Close()
for { for {
@ -82,11 +98,11 @@ func StartClientTunnel(hc *Conn, lport, rport uint16) {
}() }()
if e != nil { if e != nil {
log.Printf("Accept() got error(%v), hanging up.\n", e) logger.LogDebug(fmt.Sprintf("Accept() got error(%v), hanging up.", e))
break break
//log.Fatal(err) //log.Fatal(err)
} else { } else {
log.Println("Accepted client") logger.LogDebug(fmt.Sprintln("Accepted tunnel client"))
// outside client -> tunnel lport // outside client -> tunnel lport
go func() { go func() {
@ -99,16 +115,16 @@ func StartClientTunnel(hc *Conn, lport, rport uint16) {
n, e := c.Read(rBuf) n, e := c.Read(rBuf)
if e != nil { if e != nil {
if e == io.EOF { if e == io.EOF {
logger.LogNotice(fmt.Sprintf("lport Disconnected: shutting down tunnel [%d:%d]\n", lport, rport)) logger.LogDebug(fmt.Sprintf("lport Disconnected: shutting down tunnel [%d:%d]", lport, rport))
} else { } else {
logger.LogErr(fmt.Sprintf("Read error from lport of tun [%d:%d]\n%s", lport, rport, e)) logger.LogDebug(fmt.Sprintf("Read error from lport of tun [%d:%d]\n%s", lport, rport, e))
} }
hc.WritePacket(tunDst.Bytes(), CSOTunClose) hc.WritePacket(tunDst.Bytes(), CSOTunHangup)
break break
} }
if n > 0 { if n > 0 {
rBuf = append(tunDst.Bytes(), rBuf[:n]...) rBuf = append(tunDst.Bytes(), rBuf[:n]...)
logger.LogNotice(fmt.Sprintf("Got lport data:%v\n", tunDst.Bytes())) //logger.LogDebug(fmt.Sprintf("Got lport data:%v", tunDst.Bytes()))
hc.WritePacket(rBuf[:n+4], CSOTunData) hc.WritePacket(rBuf[:n+4], CSOTunData)
} }
} }
@ -126,12 +142,12 @@ func StartClientTunnel(hc *Conn, lport, rport uint16) {
for { for {
//fmt.Printf("Reading from client hc.tuns[%d]\n", lport) //fmt.Printf("Reading from client hc.tuns[%d]\n", lport)
bytes, ok := <-hc.tuns[rport] bytes, ok := <-t.Data
if ok { if ok {
//fmt.Printf("[Got this through tunnel:%v]\n", bytes) //fmt.Printf("[Got this through tunnel:%v]\n", bytes)
c.Write(bytes) c.Write(bytes)
} else { } else {
fmt.Printf("[Channel closed?]\n") logger.LogDebug(fmt.Sprintf("[Channel closed?]\n"))
//break //break
} }
} }
@ -141,41 +157,27 @@ func StartClientTunnel(hc *Conn, lport, rport uint16) {
} }
} }
}() }()
*/
} }
func StartServerTunnel(hc *Conn, lport, rport uint16) { func (hc *Conn) StartServerTunnel(lport, rport uint16) {
if hc.tuns == nil { hc.InitTunEndpoint(lport, "", rport)
hc.tuns = make(map[uint16]*TunEndpoint) t := hc.tuns[rport] // for convenience
}
if hc.tuns[rport] == nil {
addrs, _ := net.InterfaceAddrs()
hc.tuns[rport] = &TunEndpoint{Peer: addrs[0].String(),
Lport: lport, Rport: rport, Ctl: make(chan<- rune)}
}
// Inform client of the tunPort
var resp bytes.Buffer
binary.Write(&resp, binary.BigEndian, hc.tuns[rport].Lport)
binary.Write(&resp, binary.BigEndian, hc.tuns[rport].Rport)
hc.WritePacket(resp.Bytes(), CSOTunSetupAck)
/*
t := TunEndpoint{Peer: addrs[0].String(), Lport: lport, Rport: rport}
var resp bytes.Buffer
binary.Write(&resp, binary.BigEndian, t.Lport)
//var dialHangup chan<- bool
logger.LogDebug("Server dialling...")
c, err := net.Dial("tcp", fmt.Sprintf(":%d", rport)) c, err := net.Dial("tcp", fmt.Sprintf(":%d", rport))
if err != nil { if err != nil {
logger.LogErr(fmt.Sprintf("Nothing is serving at rport :%d!", rport)) logger.LogDebug(fmt.Sprintf("Nothing is serving at rport :%d!", rport))
binary.Write(&resp, binary.BigEndian, uint16(0)) var resp bytes.Buffer
// Inform client of the tunPort binary.Write(&resp, binary.BigEndian, lport)
binary.Write(&resp, binary.BigEndian, rport)
hc.WritePacket(resp.Bytes(), CSOTunRefused) hc.WritePacket(resp.Bytes(), CSOTunRefused)
} else { } else {
binary.Write(&resp, binary.BigEndian, t.Rport) logger.LogDebug(fmt.Sprintf("[Tunnel Opened - %d:%s:%d]", lport, t.Peer, rport))
logger.LogNotice(fmt.Sprintf("[Tunnel Opened - %d:%s:%d]", t.Lport, t.Peer, t.Rport)) var resp bytes.Buffer
binary.Write(&resp, binary.BigEndian, lport)
binary.Write(&resp, binary.BigEndian, rport)
logger.LogDebug(fmt.Sprintf("[Writing CSOTunSetupAck[%d:%d]", lport, rport))
hc.WritePacket(resp.Bytes(), CSOTunSetupAck)
// //
// worker to read data from the rport (to encrypt & send to client) // worker to read data from the rport (to encrypt & send to client)
@ -198,17 +200,19 @@ func StartServerTunnel(hc *Conn, lport, rport uint16) {
n, e := c.Read(rBuf) n, e := c.Read(rBuf)
if e != nil { if e != nil {
if e == io.EOF { if e == io.EOF {
logger.LogNotice(fmt.Sprintf("rport Disconnected: shutting down tunnel %v\n", t)) logger.LogDebug(fmt.Sprintf("rport Disconnected: shutting down tunnel %v\n", t))
} else { } else {
logger.LogErr(fmt.Sprintf("Read error from rport of tun %v\n%s", t, e)) logger.LogDebug(fmt.Sprintf("Read error from rport of tun %v\n%s", t, e))
} }
hc.WritePacket(resp.Bytes(), CSOTunClose) var resp bytes.Buffer
fmt.Printf("Closing server rport net.Dial()\n") binary.Write(&resp, binary.BigEndian, lport)
binary.Write(&resp, binary.BigEndian, rport)
hc.WritePacket(resp.Bytes(), CSOTunDisconn)
logger.LogDebug(fmt.Sprintf("Closing server rport %d net.Dial()", t.Rport))
break break
} }
if n > 0 { if n > 0 {
rBuf = append(tunDst.Bytes(), rBuf[:n]...) rBuf = append(tunDst.Bytes(), rBuf[:n]...)
logger.LogNotice(fmt.Sprintf("Got rport data:%v", tunDst.Bytes()))
hc.WritePacket(rBuf[:n+4], CSOTunData) hc.WritePacket(rBuf[:n+4], CSOTunData)
} }
} }
@ -225,17 +229,15 @@ func StartServerTunnel(hc *Conn, lport, rport uint16) {
}() }()
for { for {
rData, ok := <-hc.tuns[rport] rData, ok := <-t.Data
if ok { if ok {
logger.LogNotice(fmt.Sprintf("Got client data:%v", rData)) //logger.LogDebug(fmt.Sprintf("Got client data:%v", rData))
c.Write(rData) c.Write(rData)
} else { } else {
logger.LogErr("!!! ERROR reading from hc.tuns[] channel !!!") logger.LogDebug("!!! ERROR reading from hc.tuns[] channel !!!")
break break
} }
} }
}() }()
} }
*/
} }

39
hkexsh/hkexsh.go
View File

@ -346,12 +346,47 @@ func reqTunnel(hc *hkexnet.Conn, lp uint16, p string /*net.Addr*/, rp uint16) {
var bTmp bytes.Buffer var bTmp bytes.Buffer
binary.Write(&bTmp, binary.BigEndian, lp) binary.Write(&bTmp, binary.BigEndian, lp)
binary.Write(&bTmp, binary.BigEndian, rp) binary.Write(&bTmp, binary.BigEndian, rp)
fmt.Printf("bTmp:%x\n", bTmp.Bytes())
logger.LogDebug(fmt.Sprintln("[Client sending CSOTunSetup]"))
hc.WritePacket(bTmp.Bytes(), hkexnet.CSOTunSetup) hc.WritePacket(bTmp.Bytes(), hkexnet.CSOTunSetup)
// hkexnet.WritePacket() handles processing of client side tun setup, // hkexnet.WritePacket() handles processing of client side tun setup,
// calling hkexnet.StartClientTunnel() // calling hkexnet.StartClientTunnel()
// Server should reply immediately with CSOTunSetupAck[lport:rport] // Server should reply immediately with CSOTunSetupAck[lport:rport]
// hkexnet.Read() on server side handles server side tun setup. // hkexnet.Read() on server side handles server side tun setup.
// CSOTun packets don't reply with acks/naks in the datastream; they
// record the last status (other than CSOTunData) in the TunEndpoint
// .Status field. We can check this here to determine how the request
// completed.
// TODO: Should be a timeout check here of course to avoid hangs...
hc.InitTunEndpoint(lp, p, rp)
resp := make([]byte, 4)
var lpResp, rpResp uint16
n, e := io.ReadFull(hc, resp)
if n < 4 || e != nil {
logger.LogErr(fmt.Sprintf("[Client tun response len %d, %s\n", n, e))
} else {
lpResp = binary.BigEndian.Uint16(resp[0:2])
rpResp = binary.BigEndian.Uint16(resp[2:4])
//var s byte
//for timeout := 0; timeout < 5; timeout++ {
// s = hc.GetTunStatus(rp)
// if s != hkexnet.CSOTunSetup {
// logger.LogDebug(fmt.Sprintf("[Client tun setup result:%d\n]", s))
// break
// }
// time.Sleep(1 * time.Second)
//}
}
if lpResp == lp && rpResp == rp {
logger.LogDebug("[Client got tun setup ack OK]")
hc.StartClientTunnel(lp, rp)
} else {
logger.LogDebug(fmt.Sprintf("[Client tun response ports [%d:%d]\n", lpResp, rpResp))
logger.LogDebug(fmt.Sprintln("[Client tun setup FAILED]"))
}
return return
} }
@ -492,8 +527,8 @@ func main() {
// either the shell session or copy operation. // either the shell session or copy operation.
_ = shellMode _ = shellMode
Log, _ = logger.New(logger.LOG_USER|logger.LOG_DEBUG, "hkexsh") Log, _ = logger.New(logger.LOG_USER|logger.LOG_DEBUG|logger.LOG_NOTICE|logger.LOG_ERR, "hkexsh")
hkexnet.Init(dbg, "hkexsh", logger.LOG_USER|logger.LOG_DEBUG) hkexnet.Init(dbg, "hkexsh", logger.LOG_USER|logger.LOG_DEBUG|logger.LOG_NOTICE|logger.LOG_ERR)
if dbg { if dbg {
log.SetOutput(Log) log.SetOutput(Log)
} else { } else {

4
hkexshd/hkexshd.go
View File

@ -387,8 +387,8 @@ func main() {
} }
} }
Log, _ = logger.New(logger.LOG_DAEMON|logger.LOG_DEBUG, "hkexshd") Log, _ = logger.New(logger.LOG_DAEMON|logger.LOG_DEBUG|logger.LOG_NOTICE|logger.LOG_ERR, "hkexshd")
hkexnet.Init(dbg, "hkexshd", logger.LOG_DAEMON|logger.LOG_DEBUG) hkexnet.Init(dbg, "hkexshd", logger.LOG_DAEMON|logger.LOG_DEBUG|logger.LOG_NOTICE|logger.LOG_ERR)
if dbg { if dbg {
log.SetOutput(Log) log.SetOutput(Log)
} else { } else {