mirror of https://gogs.blitter.com/RLabs/xs
Work on setup for tunnels
Signed-off-by: Russ Magee <rmagee@gmail.com>
This commit is contained in:
Russ Magee
parent
48b0c41f62
commit
1e6da733a2
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@ -92,9 +92,9 @@ type (
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// TunEndpoint [securePort:peer:dataPort]
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TunEndpoint struct {
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tunPort uint16
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peer net.Addr
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dataPort uint16
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TunPort uint16
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Peer string //net.Addr
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DataPort uint16
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}
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// Conn is a connection wrapping net.Conn with KEX & session state
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@ -110,6 +110,8 @@ type (
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chaff ChaffConfig
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tuns []TunEndpoint
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closeStat *CSOType // close status (CSOExitStatus)
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r cipher.Stream //read cipherStream
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rm hash.Hash
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@ -123,6 +125,11 @@ var (
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Log *logger.Writer // reg. syslog output (no -d)
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)
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// Return string (suitable as map key) for a tunnel endpoint
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func (t *TunEndpoint) String() string {
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return fmt.Sprintf("[%d:%s:%d]", t.DataPort, t.Peer, t.TunPort)
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}
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func _initLogging(d bool, c string, f logger.Priority) {
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if Log == nil {
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Log, _ = logger.New(f, fmt.Sprintf("%s:hkexnet", c))
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@ -814,7 +821,14 @@ func (hc Conn) Read(b []byte) (n int, err error) {
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}
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hc.Close()
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} else if ctrlStatOp == CSOTunReq {
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Log.Notice("[Client Tunnel Open Request - TODO]\n")
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// This should ONLY be sent from client -> server!
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// TODO: Hmm. should this package (hkexnet) take a 'server'/'client' context
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// in order to know how to handle mis-uses?
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addrs, _ := net.InterfaceAddrs()
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t := TunEndpoint{Peer: addrs[0].String()}
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t.TunPort = binary.BigEndian.Uint16(payloadBytes)
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//fmt.Sscanf(string(payloadBytes), "%d", &t.tunPort)
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Log.Notice(fmt.Sprintf("[TODO: Client Tunnel Open Request - traffic for server %s, port %d]\n", t.Peer, t.TunPort))
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} else if ctrlStatOp == CSOTunAck {
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Log.Notice("[Server Tunnel Open Ack - TODO]\n")
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} else {
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@ -16,6 +16,7 @@ import (
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"io"
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"io/ioutil"
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"log"
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"net"
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"os"
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"os/exec"
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"os/user"
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@ -28,8 +29,8 @@ import (
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hkexsh "blitter.com/go/hkexsh"
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"blitter.com/go/hkexsh/hkexnet"
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"blitter.com/go/hkexsh/spinsult"
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"blitter.com/go/hkexsh/logger"
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"blitter.com/go/hkexsh/spinsult"
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isatty "github.com/mattn/go-isatty"
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)
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@ -336,6 +337,15 @@ func rejectUserMsg() string {
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return "Begone, " + spinsult.GetSentence() + "\r\n"
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}
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func requestTunnel(c *hkexnet.Conn, dp uint16, p string /*net.Addr*/, tp uint16) (t hkexnet.TunEndpoint) {
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t = hkexnet.TunEndpoint{DataPort: dp, Peer: p, TunPort: tp}
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var bTmp bytes.Buffer
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binary.Write(&bTmp, binary.BigEndian, t.DataPort)
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c.WritePacket(bTmp.Bytes(), hkexnet.CSOTunReq)
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return
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}
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// hkexsh - a client for secure shell and file copy operations.
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//
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// While conforming to the basic net.Conn interface HKex.Conn has extra
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@ -359,6 +369,7 @@ func main() {
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var server string
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var port uint
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var cmdStr string
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var tunSpecStr string // lport1:rport1[,lport2:rport2,...]
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var copySrc []byte
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var copyDst string
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@ -380,9 +391,9 @@ func main() {
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flag.UintVar(&port, "p", 2000, "`port`")
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//flag.StringVar(&authCookie, "a", "", "auth cookie")
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flag.BoolVar(&chaffEnabled, "e", true, "enabled chaff pkts (default true)")
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flag.UintVar(&chaffFreqMin, "f", 100, "chaff pkt `freq` min (msecs)")
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flag.UintVar(&chaffFreqMax, "F", 5000, "chaff pkt `freq` max (msecs)")
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flag.UintVar(&chaffBytesMax, "B", 64, "chaff pkt `size` max (bytes)")
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flag.UintVar(&chaffFreqMin, "f", 100, "`msecs-min` chaff pkt freq min (msecs)")
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flag.UintVar(&chaffFreqMax, "F", 5000, "`msecs-max` chaff pkt freq max (msecs)")
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flag.UintVar(&chaffBytesMax, "B", 64, "chaff pkt size max (bytes)")
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// Find out what program we are (shell or copier)
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myPath := strings.Split(os.Args[0], string(os.PathSeparator))
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@ -390,6 +401,7 @@ func main() {
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// hkexsh accepts a command (-x) but not
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// a srcpath (-r) or dstpath (-t)
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flag.StringVar(&cmdStr, "x", "", "`command` to run (if not specified run interactive shell)")
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flag.StringVar(&tunSpecStr, "t", "", "`tunnelspec` localPort:remotePort[,localPort:remotePort,...]")
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flag.BoolVar(&gopt, "g", false, "ask server to generate authtoken")
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shellMode = true
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flag.Usage = UsageShell
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@ -613,12 +625,24 @@ func main() {
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// Set up chaffing to server
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conn.SetupChaff(chaffFreqMin, chaffFreqMax, chaffBytesMax) // enable client->server chaffing
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if chaffEnabled {
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conn.EnableChaff()
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conn.EnableChaff() // goroutine, returns immediately
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defer conn.DisableChaff()
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defer conn.ShutdownChaff()
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}
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if shellMode {
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// TODO: tunnel setup would be here or within doShellMode()
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// TESTING - tunnel
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remAddrs, _ := net.LookupHost(remoteHost)
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t := requestTunnel(&conn, 6001, remAddrs[0], 7001)
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_ = t
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//t := hkexnet.TunEndpoint{DataPort: 6001, Peer: nil, TunPort: 7001}
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//var bTmp bytes.Buffer
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//binary.Write(&bTmp, binary.BigEndian, t.DataPort)
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//conn.WritePacket(bTmp.Bytes(), hkexnet.CSOTunReq)
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// END TESTING - tunnel
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doShellMode(isInteractive, &conn, oldState, rec)
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} else { // copyMode
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_, s := doCopyMode(&conn, pathIsDest, fileArgs, rec)
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