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v2ray-core
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move tcp.PickPort to its own package

pull/931/head
Darien Raymond 7 years ago
parent
a7d467992d
commit
af29e42771
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GPG Key ID: 7251FFA14BB18169
14 changed files with 94 additions and 85 deletions
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  1. 10
      testing/scenarios/command_test.go
  2. 9
      testing/scenarios/common.go
  3. 2
      testing/scenarios/dns_test.go
  4. 8
      testing/scenarios/dokodemo_test.go
  5. 28
      testing/scenarios/feature_test.go
  6. 14
      testing/scenarios/http_test.go
  7. 5
      testing/scenarios/policy_test.go
  8. 26
      testing/scenarios/shadowsocks_test.go
  9. 12
      testing/scenarios/socks_test.go
  10. 10
      testing/scenarios/tls_test.go
  11. 4
      testing/scenarios/transport_test.go
  12. 34
      testing/scenarios/vmess_test.go
  13. 16
      testing/servers/tcp/port.go
  14. 1
      testing/servers/udp/port.go

10
testing/scenarios/command_test.go
Unescape View File

@ -37,8 +37,8 @@ func TestCommanderRemoveHandler(t *testing.T) {
assert(err, IsNil)
defer tcpServer.Close()
clientPort := pickPort()
cmdPort := pickPort()
clientPort := tcp.PickPort()
cmdPort := tcp.PickPort()
clientConfig := &core.Config{
App: []*serial.TypedMessage{
serial.ToTypedMessage(&commander.Config{
@ -150,8 +150,8 @@ func TestCommanderAddRemoveUser(t *testing.T) {
u1 := protocol.NewID(uuid.New())
u2 := protocol.NewID(uuid.New())
cmdPort := pickPort()
serverPort := pickPort()
cmdPort := tcp.PickPort()
serverPort := tcp.PickPort()
serverConfig := &core.Config{
App: []*serial.TypedMessage{
serial.ToTypedMessage(&commander.Config{
@ -219,7 +219,7 @@ func TestCommanderAddRemoveUser(t *testing.T) {
},
}
clientPort := pickPort()
clientPort := tcp.PickPort()
clientConfig := &core.Config{
App: []*serial.TypedMessage{
serial.ToTypedMessage(&policy.Config{

9
testing/scenarios/common.go
Unescape View File

@ -22,15 +22,6 @@ import (
"v2ray.com/core/common/serial"
)
func pickPort() net.Port {
listener, err := net.Listen("tcp4", "127.0.0.1:0")
common.Must(err)
defer listener.Close()
addr := listener.Addr().(*net.TCPAddr)
return net.Port(addr.Port)
}
func xor(b []byte) []byte {
r := make([]byte, len(b))
for i, v := range b {

2
testing/scenarios/dns_test.go
Unescape View File

@ -28,7 +28,7 @@ func TestResolveIP(t *testing.T) {
assert(err, IsNil)
defer tcpServer.Close()
serverPort := pickPort()
serverPort := tcp.PickPort()
serverConfig := &core.Config{
App: []*serial.TypedMessage{
serial.ToTypedMessage(&dns.Config{

8
testing/scenarios/dokodemo_test.go
Unescape View File

@ -32,7 +32,7 @@ func TestDokodemoTCP(t *testing.T) {
defer tcpServer.Close()
userID := protocol.NewID(uuid.New())
serverPort := pickPort()
serverPort := tcp.PickPort()
serverConfig := &core.Config{
App: []*serial.TypedMessage{
serial.ToTypedMessage(&log.Config{
@ -64,7 +64,7 @@ func TestDokodemoTCP(t *testing.T) {
},
}
clientPort := uint32(pickPort())
clientPort := uint32(tcp.PickPort())
clientPortRange := uint32(5)
clientConfig := &core.Config{
App: []*serial.TypedMessage{
@ -145,7 +145,7 @@ func TestDokodemoUDP(t *testing.T) {
defer udpServer.Close()
userID := protocol.NewID(uuid.New())
serverPort := pickPort()
serverPort := tcp.PickPort()
serverConfig := &core.Config{
Inbound: []*core.InboundHandlerConfig{
{
@ -171,7 +171,7 @@ func TestDokodemoUDP(t *testing.T) {
},
}
clientPort := uint32(pickPort())
clientPort := uint32(tcp.PickPort())
clientPortRange := uint32(5)
clientConfig := &core.Config{
Inbound: []*core.InboundHandlerConfig{

28
testing/scenarios/feature_test.go
Unescape View File

@ -46,7 +46,7 @@ func TestPassiveConnection(t *testing.T) {
assert(err, IsNil)
defer tcpServer.Close()
serverPort := pickPort()
serverPort := tcp.PickPort()
serverConfig := &core.Config{
Inbound: []*core.InboundHandlerConfig{
{
@ -117,7 +117,7 @@ func TestProxy(t *testing.T) {
defer tcpServer.Close()
serverUserID := protocol.NewID(uuid.New())
serverPort := pickPort()
serverPort := tcp.PickPort()
serverConfig := &core.Config{
Inbound: []*core.InboundHandlerConfig{
{
@ -144,7 +144,7 @@ func TestProxy(t *testing.T) {
}
proxyUserID := protocol.NewID(uuid.New())
proxyPort := pickPort()
proxyPort := tcp.PickPort()
proxyConfig := &core.Config{
Inbound: []*core.InboundHandlerConfig{
{
@ -170,7 +170,7 @@ func TestProxy(t *testing.T) {
},
}
clientPort := pickPort()
clientPort := tcp.PickPort()
clientConfig := &core.Config{
Inbound: []*core.InboundHandlerConfig{
{
@ -265,7 +265,7 @@ func TestProxyOverKCP(t *testing.T) {
defer tcpServer.Close()
serverUserID := protocol.NewID(uuid.New())
serverPort := pickPort()
serverPort := tcp.PickPort()
serverConfig := &core.Config{
Inbound: []*core.InboundHandlerConfig{
{
@ -295,7 +295,7 @@ func TestProxyOverKCP(t *testing.T) {
}
proxyUserID := protocol.NewID(uuid.New())
proxyPort := pickPort()
proxyPort := tcp.PickPort()
proxyConfig := &core.Config{
Inbound: []*core.InboundHandlerConfig{
{
@ -326,7 +326,7 @@ func TestProxyOverKCP(t *testing.T) {
},
}
clientPort := pickPort()
clientPort := tcp.PickPort()
clientConfig := &core.Config{
Inbound: []*core.InboundHandlerConfig{
{
@ -430,8 +430,8 @@ func TestBlackhole(t *testing.T) {
assert(err, IsNil)
defer tcpServer2.Close()
serverPort := pickPort()
serverPort2 := pickPort()
serverPort := tcp.PickPort()
serverPort2 := tcp.PickPort()
serverConfig := &core.Config{
Inbound: []*core.InboundHandlerConfig{
{
@ -521,7 +521,7 @@ func TestForward(t *testing.T) {
assert(err, IsNil)
defer tcpServer.Close()
serverPort := pickPort()
serverPort := tcp.PickPort()
serverConfig := &core.Config{
Inbound: []*core.InboundHandlerConfig{
{
@ -587,7 +587,7 @@ func TestUDPConnection(t *testing.T) {
assert(err, IsNil)
defer udpServer.Close()
clientPort := pickPort()
clientPort := tcp.PickPort()
clientConfig := &core.Config{
Inbound: []*core.InboundHandlerConfig{
{
@ -663,8 +663,8 @@ func TestUDPConnection(t *testing.T) {
func TestDomainSniffing(t *testing.T) {
assert := With(t)
sniffingPort := pickPort()
httpPort := pickPort()
sniffingPort := tcp.PickPort()
httpPort := tcp.PickPort()
serverConfig := &core.Config{
Inbound: []*core.InboundHandlerConfig{
{
@ -764,7 +764,7 @@ func TestDialV2Ray(t *testing.T) {
defer tcpServer.Close()
userID := protocol.NewID(uuid.New())
serverPort := pickPort()
serverPort := tcp.PickPort()
serverConfig := &core.Config{
App: []*serial.TypedMessage{
serial.ToTypedMessage(&log.Config{

14
testing/scenarios/http_test.go
Unescape View File

@ -26,7 +26,7 @@ import (
func TestHttpConformance(t *testing.T) {
assert := With(t)
httpServerPort := pickPort()
httpServerPort := tcp.PickPort()
httpServer := &v2httptest.Server{
Port: httpServerPort,
PathHandler: make(map[string]http.HandlerFunc),
@ -35,7 +35,7 @@ func TestHttpConformance(t *testing.T) {
assert(err, IsNil)
defer httpServer.Close()
serverPort := pickPort()
serverPort := tcp.PickPort()
serverConfig := &core.Config{
Inbound: []*core.InboundHandlerConfig{
{
@ -90,7 +90,7 @@ func TestHttpConnectMethod(t *testing.T) {
assert(err, IsNil)
defer tcpServer.Close()
serverPort := pickPort()
serverPort := tcp.PickPort()
serverConfig := &core.Config{
Inbound: []*core.InboundHandlerConfig{
{
@ -146,7 +146,7 @@ func TestHttpConnectMethod(t *testing.T) {
func TestHttpPost(t *testing.T) {
assert := With(t)
httpServerPort := pickPort()
httpServerPort := tcp.PickPort()
httpServer := &v2httptest.Server{
Port: httpServerPort,
PathHandler: map[string]http.HandlerFunc{
@ -169,7 +169,7 @@ func TestHttpPost(t *testing.T) {
assert(err, IsNil)
defer httpServer.Close()
serverPort := pickPort()
serverPort := tcp.PickPort()
serverConfig := &core.Config{
Inbound: []*core.InboundHandlerConfig{
{
@ -226,7 +226,7 @@ func setProxyBasicAuth(req *http.Request, user, pass string) {
func TestHttpBasicAuth(t *testing.T) {
assert := With(t)
httpServerPort := pickPort()
httpServerPort := tcp.PickPort()
httpServer := &v2httptest.Server{
Port: httpServerPort,
PathHandler: make(map[string]http.HandlerFunc),
@ -235,7 +235,7 @@ func TestHttpBasicAuth(t *testing.T) {
assert(err, IsNil)
defer httpServer.Close()
serverPort := pickPort()
serverPort := tcp.PickPort()
serverConfig := &core.Config{
Inbound: []*core.InboundHandlerConfig{
{

5
testing/scenarios/policy_test.go
Unescape View File

@ -17,6 +17,7 @@ import (
"v2ray.com/core/proxy/vmess"
"v2ray.com/core/proxy/vmess/inbound"
"v2ray.com/core/proxy/vmess/outbound"
"v2ray.com/core/testing/servers/tcp"
. "v2ray.com/ext/assert"
)
@ -49,7 +50,7 @@ func TestVMessClosing(t *testing.T) {
dest := net.DestinationFromAddr(tcpServer.Addr())
userID := protocol.NewID(uuid.New())
serverPort := pickPort()
serverPort := tcp.PickPort()
serverConfig := &core.Config{
App: []*serial.TypedMessage{
serial.ToTypedMessage(&policy.Config{
@ -88,7 +89,7 @@ func TestVMessClosing(t *testing.T) {
},
}
clientPort := pickPort()
clientPort := tcp.PickPort()
clientConfig := &core.Config{
App: []*serial.TypedMessage{
serial.ToTypedMessage(&policy.Config{

26
testing/scenarios/shadowsocks_test.go
Unescape View File

@ -41,7 +41,7 @@ func TestShadowsocksAES256TCP(t *testing.T) {
Ota: shadowsocks.Account_Enabled,
})
serverPort := pickPort()
serverPort := tcp.PickPort()
serverConfig := &core.Config{
App: []*serial.TypedMessage{
serial.ToTypedMessage(&log.Config{
@ -70,7 +70,7 @@ func TestShadowsocksAES256TCP(t *testing.T) {
},
}
clientPort := pickPort()
clientPort := tcp.PickPort()
clientConfig := &core.Config{
App: []*serial.TypedMessage{
serial.ToTypedMessage(&log.Config{
@ -159,7 +159,7 @@ func TestShadowsocksAES128UDP(t *testing.T) {
Ota: shadowsocks.Account_Enabled,
})
serverPort := pickPort()
serverPort := tcp.PickPort()
serverConfig := &core.Config{
App: []*serial.TypedMessage{
serial.ToTypedMessage(&log.Config{
@ -189,7 +189,7 @@ func TestShadowsocksAES128UDP(t *testing.T) {
},
}
clientPort := pickPort()
clientPort := tcp.PickPort()
clientConfig := &core.Config{
App: []*serial.TypedMessage{
serial.ToTypedMessage(&log.Config{
@ -278,7 +278,7 @@ func TestShadowsocksChacha20TCP(t *testing.T) {
Ota: shadowsocks.Account_Enabled,
})
serverPort := pickPort()
serverPort := tcp.PickPort()
serverConfig := &core.Config{
App: []*serial.TypedMessage{
serial.ToTypedMessage(&log.Config{
@ -307,7 +307,7 @@ func TestShadowsocksChacha20TCP(t *testing.T) {
},
}
clientPort := pickPort()
clientPort := tcp.PickPort()
clientConfig := &core.Config{
App: []*serial.TypedMessage{
serial.ToTypedMessage(&log.Config{
@ -395,7 +395,7 @@ func TestShadowsocksAES256GCMTCP(t *testing.T) {
CipherType: shadowsocks.CipherType_AES_256_GCM,
})
serverPort := pickPort()
serverPort := tcp.PickPort()
serverConfig := &core.Config{
App: []*serial.TypedMessage{
serial.ToTypedMessage(&log.Config{
@ -424,7 +424,7 @@ func TestShadowsocksAES256GCMTCP(t *testing.T) {
},
}
clientPort := pickPort()
clientPort := tcp.PickPort()
clientConfig := &core.Config{
App: []*serial.TypedMessage{
serial.ToTypedMessage(&log.Config{
@ -512,7 +512,7 @@ func TestShadowsocksAES128GCMUDP(t *testing.T) {
CipherType: shadowsocks.CipherType_AES_128_GCM,
})
serverPort := pickPort()
serverPort := tcp.PickPort()
serverConfig := &core.Config{
App: []*serial.TypedMessage{
serial.ToTypedMessage(&log.Config{
@ -542,7 +542,7 @@ func TestShadowsocksAES128GCMUDP(t *testing.T) {
},
}
clientPort := pickPort()
clientPort := tcp.PickPort()
clientConfig := &core.Config{
App: []*serial.TypedMessage{
serial.ToTypedMessage(&log.Config{
@ -630,7 +630,7 @@ func TestShadowsocksAES256GCMConformance(t *testing.T) {
CipherType: shadowsocks.CipherType_AES_256_GCM,
})
serverPort := pickPort()
serverPort := tcp.PickPort()
serverConfig := &core.Config{
App: []*serial.TypedMessage{
serial.ToTypedMessage(&log.Config{
@ -708,7 +708,7 @@ func TestShadowsocksChacha20Poly1305UDPConformance(t *testing.T) {
CipherType: shadowsocks.CipherType_CHACHA20_POLY1305,
})
serverPort := pickPort()
serverPort := tcp.PickPort()
serverConfig := &core.Config{
App: []*serial.TypedMessage{
serial.ToTypedMessage(&log.Config{
@ -791,7 +791,7 @@ func TestShadowsocksChacha20Conformance(t *testing.T) {
Ota: shadowsocks.Account_Disabled,
})
serverPort := pickPort()
serverPort := tcp.PickPort()
serverConfig := &core.Config{
App: []*serial.TypedMessage{
serial.ToTypedMessage(&log.Config{

12
testing/scenarios/socks_test.go
Unescape View File

@ -28,7 +28,7 @@ func TestSocksBridgeTCP(t *testing.T) {
assert(err, IsNil)
defer tcpServer.Close()
serverPort := pickPort()
serverPort := tcp.PickPort()
serverConfig := &core.Config{
Inbound: []*core.InboundHandlerConfig{
{
@ -53,7 +53,7 @@ func TestSocksBridgeTCP(t *testing.T) {
},
}
clientPort := pickPort()
clientPort := tcp.PickPort()
clientConfig := &core.Config{
Inbound: []*core.InboundHandlerConfig{
{
@ -125,7 +125,7 @@ func TestSocksBridageUDP(t *testing.T) {
assert(err, IsNil)
defer udpServer.Close()
serverPort := pickPort()
serverPort := tcp.PickPort()
serverConfig := &core.Config{
Inbound: []*core.InboundHandlerConfig{
{
@ -150,7 +150,7 @@ func TestSocksBridageUDP(t *testing.T) {
},
}
clientPort := pickPort()
clientPort := tcp.PickPort()
clientConfig := &core.Config{
Inbound: []*core.InboundHandlerConfig{
{
@ -222,8 +222,8 @@ func TestSocksConformance(t *testing.T) {
assert(err, IsNil)
defer tcpServer.Close()
authPort := pickPort()
noAuthPort := pickPort()
authPort := tcp.PickPort()
noAuthPort := tcp.PickPort()
serverConfig := &core.Config{
Inbound: []*core.InboundHandlerConfig{
{

10
testing/scenarios/tls_test.go
Unescape View File

@ -36,7 +36,7 @@ func TestSimpleTLSConnection(t *testing.T) {
defer tcpServer.Close()
userID := protocol.NewID(uuid.New())
serverPort := pickPort()
serverPort := tcp.PickPort()
serverConfig := &core.Config{
Inbound: []*core.InboundHandlerConfig{
{
@ -70,7 +70,7 @@ func TestSimpleTLSConnection(t *testing.T) {
},
}
clientPort := pickPort()
clientPort := tcp.PickPort()
clientConfig := &core.Config{
Inbound: []*core.InboundHandlerConfig{
{
@ -185,7 +185,7 @@ func TestTLSOverKCP(t *testing.T) {
},
}
clientPort := pickPort()
clientPort := tcp.PickPort()
clientConfig := &core.Config{
Inbound: []*core.InboundHandlerConfig{
{
@ -266,7 +266,7 @@ func TestTLSOverWebSocket(t *testing.T) {
defer tcpServer.Close()
userID := protocol.NewID(uuid.New())
serverPort := pickPort()
serverPort := tcp.PickPort()
serverConfig := &core.Config{
Inbound: []*core.InboundHandlerConfig{
{
@ -301,7 +301,7 @@ func TestTLSOverWebSocket(t *testing.T) {
},
}
clientPort := pickPort()
clientPort := tcp.PickPort()
clientConfig := &core.Config{
Inbound: []*core.InboundHandlerConfig{
{

4
testing/scenarios/transport_test.go
Unescape View File

@ -33,7 +33,7 @@ func TestHttpConnectionHeader(t *testing.T) {
defer tcpServer.Close()
userID := protocol.NewID(uuid.New())
serverPort := pickPort()
serverPort := tcp.PickPort()
serverConfig := &core.Config{
Inbound: []*core.InboundHandlerConfig{
{
@ -69,7 +69,7 @@ func TestHttpConnectionHeader(t *testing.T) {
},
}
clientPort := pickPort()
clientPort := tcp.PickPort()
clientConfig := &core.Config{
Inbound: []*core.InboundHandlerConfig{
{

34
testing/scenarios/vmess_test.go
Unescape View File

@ -36,7 +36,7 @@ func TestVMessDynamicPort(t *testing.T) {
defer tcpServer.Close()
userID := protocol.NewID(uuid.New())
serverPort := pickPort()
serverPort := tcp.PickPort()
serverConfig := &core.Config{
App: []*serial.TypedMessage{
serial.ToTypedMessage(&log.Config{
@ -91,7 +91,7 @@ func TestVMessDynamicPort(t *testing.T) {
},
}
clientPort := pickPort()
clientPort := tcp.PickPort()
clientConfig := &core.Config{
App: []*serial.TypedMessage{
serial.ToTypedMessage(&log.Config{
@ -171,7 +171,7 @@ func TestVMessGCM(t *testing.T) {
defer tcpServer.Close()
userID := protocol.NewID(uuid.New())
serverPort := pickPort()
serverPort := tcp.PickPort()
serverConfig := &core.Config{
App: []*serial.TypedMessage{
serial.ToTypedMessage(&log.Config{
@ -204,7 +204,7 @@ func TestVMessGCM(t *testing.T) {
},
}
clientPort := pickPort()
clientPort := tcp.PickPort()
clientConfig := &core.Config{
App: []*serial.TypedMessage{
serial.ToTypedMessage(&log.Config{
@ -294,7 +294,7 @@ func TestVMessGCMUDP(t *testing.T) {
defer udpServer.Close()
userID := protocol.NewID(uuid.New())
serverPort := pickPort()
serverPort := tcp.PickPort()
serverConfig := &core.Config{
App: []*serial.TypedMessage{
serial.ToTypedMessage(&log.Config{
@ -327,7 +327,7 @@ func TestVMessGCMUDP(t *testing.T) {
},
}
clientPort := pickPort()
clientPort := tcp.PickPort()
clientConfig := &core.Config{
App: []*serial.TypedMessage{
serial.ToTypedMessage(&log.Config{
@ -427,7 +427,7 @@ func TestVMessChacha20(t *testing.T) {
defer tcpServer.Close()
userID := protocol.NewID(uuid.New())
serverPort := pickPort()
serverPort := tcp.PickPort()
serverConfig := &core.Config{
App: []*serial.TypedMessage{
serial.ToTypedMessage(&log.Config{
@ -460,7 +460,7 @@ func TestVMessChacha20(t *testing.T) {
},
}
clientPort := pickPort()
clientPort := tcp.PickPort()
clientConfig := &core.Config{
App: []*serial.TypedMessage{
serial.ToTypedMessage(&log.Config{
@ -550,7 +550,7 @@ func TestVMessNone(t *testing.T) {
defer tcpServer.Close()
userID := protocol.NewID(uuid.New())
serverPort := pickPort()
serverPort := tcp.PickPort()
serverConfig := &core.Config{
App: []*serial.TypedMessage{
serial.ToTypedMessage(&log.Config{
@ -583,7 +583,7 @@ func TestVMessNone(t *testing.T) {
},
}
clientPort := pickPort()
clientPort := tcp.PickPort()
clientConfig := &core.Config{
App: []*serial.TypedMessage{
serial.ToTypedMessage(&log.Config{
@ -711,7 +711,7 @@ func TestVMessKCP(t *testing.T) {
},
}
clientPort := pickPort()
clientPort := tcp.PickPort()
clientConfig := &core.Config{
App: []*serial.TypedMessage{
serial.ToTypedMessage(&log.Config{
@ -808,7 +808,7 @@ func TestVMessIPv6(t *testing.T) {
defer tcpServer.Close()
userID := protocol.NewID(uuid.New())
serverPort := pickPort()
serverPort := tcp.PickPort()
serverConfig := &core.Config{
App: []*serial.TypedMessage{
serial.ToTypedMessage(&log.Config{
@ -841,7 +841,7 @@ func TestVMessIPv6(t *testing.T) {
},
}
clientPort := pickPort()
clientPort := tcp.PickPort()
clientConfig := &core.Config{
App: []*serial.TypedMessage{
serial.ToTypedMessage(&log.Config{
@ -923,7 +923,7 @@ func TestVMessGCMMux(t *testing.T) {
defer tcpServer.Close()
userID := protocol.NewID(uuid.New())
serverPort := pickPort()
serverPort := tcp.PickPort()
serverConfig := &core.Config{
App: []*serial.TypedMessage{
serial.ToTypedMessage(&log.Config{
@ -956,7 +956,7 @@ func TestVMessGCMMux(t *testing.T) {
},
}
clientPort := pickPort()
clientPort := tcp.PickPort()
clientConfig := &core.Config{
App: []*serial.TypedMessage{
serial.ToTypedMessage(&log.Config{
@ -1065,7 +1065,7 @@ func TestVMessGCMMuxUDP(t *testing.T) {
defer udpServer.Close()
userID := protocol.NewID(uuid.New())
serverPort := pickPort()
serverPort := tcp.PickPort()
serverConfig := &core.Config{
App: []*serial.TypedMessage{
serial.ToTypedMessage(&log.Config{
@ -1098,7 +1098,7 @@ func TestVMessGCMMuxUDP(t *testing.T) {
},
}
clientPort := pickPort()
clientPort := tcp.PickPort()
clientUDPPort := udp.PickPort()
clientConfig := &core.Config{
App: []*serial.TypedMessage{

16
testing/servers/tcp/port.go
Unescape View File

@ -0,0 +1,16 @@
package tcp
import (
"v2ray.com/core/common"
"v2ray.com/core/common/net"
)
// PickPort returns an unused TCP port in the system. The port returned is highly likely to be unused, but not guaranteed.
func PickPort() net.Port {
listener, err := net.Listen("tcp4", "127.0.0.1:0")
common.Must(err)
defer listener.Close()
addr := listener.Addr().(*net.TCPAddr)
return net.Port(addr.Port)
}

1
testing/servers/udp/port.go
Unescape View File

@ -5,6 +5,7 @@ import (
"v2ray.com/core/common/net"
)
// PickPort returns an unused UDP port in the system. The port returned is highly likely to be unused, but not guaranteed.
func PickPort() net.Port {
conn, err := net.ListenUDP("udp4", &net.UDPAddr{
IP: net.LocalHostIP.IP(),

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