support custom port range #2

go.mod

@@ -6,20 +6,20 @@ require (
 	github.com/UserExistsError/conpty v0.1.4
 	github.com/creack/pty v1.1.21
 	github.com/quic-go/quic-go v0.45.1
-	github.com/trzsz/go-arg v1.5.3
-	github.com/xtaci/kcp-go/v5 v5.6.8
-	github.com/xtaci/smux v1.5.24
+	github.com/trzsz/go-arg v1.5.4
+	github.com/xtaci/kcp-go/v5 v5.6.9
+	github.com/xtaci/smux v1.5.25
 	golang.org/x/crypto v0.25.0
 	golang.org/x/sys v0.22.0
 )
 
 require (
 	github.com/alexflint/go-scalar v1.2.0 // indirect
 	github.com/go-task/slim-sprig/v3 v3.0.0 // indirect
-	github.com/google/pprof v0.0.0-20240711041743-f6c9dda6c6da // indirect
+	github.com/google/pprof v0.0.0-20240722153945-304e4f0156b8 // indirect
 	github.com/klauspost/cpuid/v2 v2.2.8 // indirect
 	github.com/klauspost/reedsolomon v1.12.3 // indirect
-	github.com/onsi/ginkgo/v2 v2.19.0 // indirect
+	github.com/onsi/ginkgo/v2 v2.19.1 // indirect
 	github.com/pkg/errors v0.9.1 // indirect
 	github.com/templexxx/cpu v0.1.1-0.20240303154708-598a14b050c5 // indirect
 	github.com/templexxx/xorsimd v0.4.2 // indirect

go.sum

@@ -14,8 +14,8 @@ github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSs
 github.com/envoyproxy/go-control-plane v0.9.0/go.mod h1:YTl/9mNaCwkRvm6d1a2C3ymFceY/DCBVvsKhRF0iEA4=
 github.com/envoyproxy/go-control-plane v0.9.4/go.mod h1:6rpuAdCZL397s3pYoYcLgu1mIlRU8Am5FuJP05cCM98=
 github.com/envoyproxy/protoc-gen-validate v0.1.0/go.mod h1:iSmxcyjqTsJpI2R4NaDN7+kN2VEUnK/pcBlmesArF7c=
-github.com/go-logr/logr v1.4.1 h1:pKouT5E8xu9zeFC39JXRDukb6JFQPXM5p5I91188VAQ=
-github.com/go-logr/logr v1.4.1/go.mod h1:9T104GzyrTigFIr8wt5mBrctHMim0Nb2HLGrmQ40KvY=
+github.com/go-logr/logr v1.4.2 h1:6pFjapn8bFcIbiKo3XT4j/BhANplGihG6tvd+8rYgrY=
+github.com/go-logr/logr v1.4.2/go.mod h1:9T104GzyrTigFIr8wt5mBrctHMim0Nb2HLGrmQ40KvY=
 github.com/go-task/slim-sprig/v3 v3.0.0 h1:sUs3vkvUymDpBKi3qH1YSqBQk9+9D/8M2mN1vB6EwHI=
 github.com/go-task/slim-sprig/v3 v3.0.0/go.mod h1:W848ghGpv3Qj3dhTPRyJypKRiqCdHZiAzKg9hl15HA8=
 github.com/golang/glog v0.0.0-20160126235308-23def4e6c14b/go.mod h1:SBH7ygxi8pfUlaOkMMuAQtPIUF8ecWP5IEl/CR7VP2Q=
@@ -35,16 +35,16 @@ github.com/google/go-cmp v0.3.1/go.mod h1:8QqcDgzrUqlUb/G2PQTWiueGozuR1884gddMyw
 github.com/google/go-cmp v0.4.0/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
 github.com/google/go-cmp v0.6.0 h1:ofyhxvXcZhMsU5ulbFiLKl/XBFqE1GSq7atu8tAmTRI=
 github.com/google/go-cmp v0.6.0/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=
-github.com/google/pprof v0.0.0-20240711041743-f6c9dda6c6da h1:xRmpO92tb8y+Z85iUOMOicpCfaYcv7o3Cg3wKrIpg8g=
-github.com/google/pprof v0.0.0-20240711041743-f6c9dda6c6da/go.mod h1:K1liHPHnj73Fdn/EKuT8nrFqBihUSKXoLYU0BuatOYo=
+github.com/google/pprof v0.0.0-20240722153945-304e4f0156b8 h1:ssNFCCVmib/GQSzx3uCWyfMgOamLGWuGqlMS77Y1m3Y=
+github.com/google/pprof v0.0.0-20240722153945-304e4f0156b8/go.mod h1:K1liHPHnj73Fdn/EKuT8nrFqBihUSKXoLYU0BuatOYo=
 github.com/klauspost/cpuid/v2 v2.2.8 h1:+StwCXwm9PdpiEkPyzBXIy+M9KUb4ODm0Zarf1kS5BM=
 github.com/klauspost/cpuid/v2 v2.2.8/go.mod h1:Lcz8mBdAVJIBVzewtcLocK12l3Y+JytZYpaMropDUws=
 github.com/klauspost/reedsolomon v1.12.3 h1:tzUznbfc3OFwJaTebv/QdhnFf2Xvb7gZ24XaHLBPmdc=
 github.com/klauspost/reedsolomon v1.12.3/go.mod h1:3K5rXwABAvzGeR01r6pWZieUALXO/Tq7bFKGIb4m4WI=
-github.com/onsi/ginkgo/v2 v2.19.0 h1:9Cnnf7UHo57Hy3k6/m5k3dRfGTMXGvxhHFvkDTCTpvA=
-github.com/onsi/ginkgo/v2 v2.19.0/go.mod h1:rlwLi9PilAFJ8jCg9UE1QP6VBpd6/xj3SRC0d6TU0To=
-github.com/onsi/gomega v1.33.1 h1:dsYjIxxSR755MDmKVsaFQTE22ChNBcuuTWgkUDSubOk=
-github.com/onsi/gomega v1.33.1/go.mod h1:U4R44UsT+9eLIaYRB2a5qajjtQYn0hauxvRm16AVYg0=
+github.com/onsi/ginkgo/v2 v2.19.1 h1:QXgq3Z8Crl5EL1WBAC98A5sEBHARrAJNzAmMxzLcRF0=
+github.com/onsi/ginkgo/v2 v2.19.1/go.mod h1:O3DtEWQkPa/F7fBMgmZQKKsluAy8pd3rEQdrjkPb9zA=
+github.com/onsi/gomega v1.34.0 h1:eSSPsPNp6ZpsG8X1OVmOTxig+CblTc4AxpPBykhe2Os=
+github.com/onsi/gomega v1.34.0/go.mod h1:MIKI8c+f+QLWk+hxbePD4i0LMJSExPaZOVfkoex4cAo=
 github.com/pkg/errors v0.9.1 h1:FEBLx1zS214owpjy7qsBeixbURkuhQAwrK5UwLGTwt4=
 github.com/pkg/errors v0.9.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
@@ -62,14 +62,14 @@ github.com/templexxx/xorsimd v0.4.2 h1:ocZZ+Nvu65LGHmCLZ7OoCtg8Fx8jnHKK37SjvngUo
 github.com/templexxx/xorsimd v0.4.2/go.mod h1:HgwaPoDREdi6OnULpSfxhzaiiSUY4Fi3JPn1wpt28NI=
 github.com/tjfoc/gmsm v1.4.1 h1:aMe1GlZb+0bLjn+cKTPEvvn9oUEBlJitaZiiBwsbgho=
 github.com/tjfoc/gmsm v1.4.1/go.mod h1:j4INPkHWMrhJb38G+J6W4Tw0AbuN8Thu3PbdVYhVcTE=
-github.com/trzsz/go-arg v1.5.3 h1:eIDwDEmvSahtr5HpQOLrSa+YMqWQQ0H20xx60XgXQJw=
-github.com/trzsz/go-arg v1.5.3/go.mod h1:IC6Z/FiVH7uYvcbp1/gJhDYCFPS/GkL0APYakVvgY4I=
-github.com/xtaci/kcp-go/v5 v5.6.8 h1:jlI/0jAyjoOjT/SaGB58s4bQMJiNS41A2RKzR6TMWeI=
-github.com/xtaci/kcp-go/v5 v5.6.8/go.mod h1:oE9j2NVqAkuKO5o8ByKGch3vgVX3BNf8zqP8JiGq0bM=
+github.com/trzsz/go-arg v1.5.4 h1:8cuwV8F1UvlKRXJcdLG1cSZNGXkRped+U1rz17M7Kac=
+github.com/trzsz/go-arg v1.5.4/go.mod h1:IC6Z/FiVH7uYvcbp1/gJhDYCFPS/GkL0APYakVvgY4I=
+github.com/xtaci/kcp-go/v5 v5.6.9 h1:rSfwk6ofh0wrwtlOyzXFNUkXRu6vsXpTF1y8Kh/nof4=
+github.com/xtaci/kcp-go/v5 v5.6.9/go.mod h1:GSs9Z62r41kTb4CxKaRKr6ED+j7I0sUvj7Koql/RN6c=
 github.com/xtaci/lossyconn v0.0.0-20190602105132-8df528c0c9ae h1:J0GxkO96kL4WF+AIT3M4mfUVinOCPgf2uUWYFUzN0sM=
 github.com/xtaci/lossyconn v0.0.0-20190602105132-8df528c0c9ae/go.mod h1:gXtu8J62kEgmN++bm9BVICuT/e8yiLI2KFobd/TRFsE=
-github.com/xtaci/smux v1.5.24 h1:77emW9dtnOxxOQ5ltR+8BbsX1kzcOxQ5gB+aaV9hXOY=
-github.com/xtaci/smux v1.5.24/go.mod h1:OMlQbT5vcgl2gb49mFkYo6SMf+zP3rcjcwQz7ZU7IGY=
+github.com/xtaci/smux v1.5.25 h1:pNWlUQFcE0O4letC2+giIjxbGVQXWmjD5vAc/opm3A0=
+github.com/xtaci/smux v1.5.25/go.mod h1:OMlQbT5vcgl2gb49mFkYo6SMf+zP3rcjcwQz7ZU7IGY=
 go.uber.org/mock v0.4.0 h1:VcM4ZOtdbR4f6VXfiOpwpVJDL6lCReaZ6mw31wqh7KU=
 go.uber.org/mock v0.4.0/go.mod h1:a6FSlNadKUHUa9IP5Vyt1zh4fC7uAwxMutEAscFbkZc=
 golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
@@ -135,8 +135,8 @@ google.golang.org/protobuf v0.0.0-20200228230310-ab0ca4ff8a60/go.mod h1:cfTl7dwQ
 google.golang.org/protobuf v1.20.1-0.20200309200217-e05f789c0967/go.mod h1:A+miEFZTKqfCUM6K7xSMQL9OKL/b6hQv+e19PK+JZNE=
 google.golang.org/protobuf v1.21.0/go.mod h1:47Nbq4nVaFHyn7ilMalzfO3qCViNmqZ2kzikPIcrTAo=
 google.golang.org/protobuf v1.23.0/go.mod h1:EGpADcykh3NcUnDUJcl1+ZksZNG86OlYog2l/sGQquU=
-google.golang.org/protobuf v1.33.0 h1:uNO2rsAINq/JlFpSdYEKIZ0uKD/R9cpdv0T+yoGwGmI=
-google.golang.org/protobuf v1.33.0/go.mod h1:c6P6GXX6sHbq/GpV6MGZEdwhWPcYBgnhAHhKbcUYpos=
+google.golang.org/protobuf v1.34.1 h1:9ddQBjfCyZPOHPUiPxpYESBLc+T8P3E+Vo4IbKZgFWg=
+google.golang.org/protobuf v1.34.1/go.mod h1:c6P6GXX6sHbq/GpV6MGZEdwhWPcYBgnhAHhKbcUYpos=
 gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
 gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
 honnef.co/go/tools v0.0.0-20190102054323-c2f93a96b099/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=

tsshd/main.go

@@ -41,7 +41,8 @@ const kTsshdVersion = "0.1.2"
 var exitChan = make(chan int, 1)
 
 type tsshdArgs struct {
-	KCP bool `arg:"--kcp" help:"KCP protocol (default is QUIC protocol)"`
+	KCP  bool   `arg:"--kcp" help:"KCP protocol (default is QUIC protocol)"`
+	Port string `arg:"--port" placeholder:"low-high" help:"UDP port range that the tsshd listens on"`
 }
 
 func (tsshdArgs) Description() string {

tsshd/server.go

@@ -37,7 +37,10 @@ import (
 	"math/big"
 	math_rand "math/rand"
 	"net"
+	"strconv"
+	"strings"
 	"time"
+	"unicode"
 
 	"github.com/quic-go/quic-go"
 	"github.com/xtaci/kcp-go/v5"
@@ -60,8 +63,7 @@ var quicConfig = quic.Config{
 }
 
 func initServer(args *tsshdArgs) (*kcp.Listener, *quic.Listener, error) {
-	portRangeLow := kDefaultPortRangeLow
-	portRangeHigh := kDefaultPortRangeHigh
+	portRangeLow, portRangeHigh := getPortRange(args)
 	conn, port, err := listenUdpOnFreePort(portRangeLow, portRangeHigh)
 	if err != nil {
 		return nil, nil, err
@@ -98,6 +100,27 @@ func initServer(args *tsshdArgs) (*kcp.Listener, *quic.Listener, error) {
 	return kcpListener, quicListener, nil
 }
 
+func getPortRange(args *tsshdArgs) (int, int) {
+	if args.Port == "" {
+		return kDefaultPortRangeLow, kDefaultPortRangeHigh
+	}
+	ports := strings.FieldsFunc(args.Port, func(c rune) bool {
+		return unicode.IsSpace(c) || c == ',' || c == '-'
+	})
+	if len(ports) == 1 {
+		if port, err := strconv.Atoi(ports[0]); err == nil {
+			return port, port
+		}
+	} else if len(ports) == 2 {
+		port0, err0 := strconv.Atoi(ports[0])
+		port1, err1 := strconv.Atoi(ports[1])
+		if err0 == nil && err1 == nil {
+			return port0, port1
+		}
+	}
+	return kDefaultPortRangeLow, kDefaultPortRangeHigh
+}
+
 func listenUdpOnFreePort(low, high int) (*net.UDPConn, int, error) {
 	if high < low {
 		return nil, 0, fmt.Errorf("no port in [%d,%d]", low, high)