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//go:build !js
// +build !js
package ice
import (
"net"
"sync"
"testing"
"time"
"github.com/pion/stun"
"github.com/stretchr/testify/require"
)
func TestUniversalUDPMux(t *testing.T) {
conn, err := net.ListenUDP(udp, &net.UDPAddr{IP: net.IPv4(127, 0, 0, 1)})
require.NoError(t, err)
udpMux := NewUniversalUDPMuxDefault(UniversalUDPMuxParams{
Logger: nil,
UDPConn: conn,
})
defer func() {
_ = udpMux.Close()
_ = conn.Close()
}()
require.NotNil(t, udpMux.LocalAddr(), "tcpMux.LocalAddr() is nil")
wg := sync.WaitGroup{}
wg.Add(1)
go func() {
defer wg.Done()
testMuxSrflxConnection(t, udpMux, "ufrag4", udp)
}()
wg.Wait()
}
func testMuxSrflxConnection(t *testing.T, udpMux *UniversalUDPMuxDefault, ufrag string, network string) {
pktConn, err := udpMux.GetConn(ufrag, udpMux.LocalAddr())
require.NoError(t, err, "error retrieving muxed connection for ufrag")
defer func() {
_ = pktConn.Close()
}()
remoteConn, err := net.DialUDP(network, nil, &net.UDPAddr{
Port: udpMux.LocalAddr().(*net.UDPAddr).Port,
})
require.NoError(t, err, "error dialing test udp connection")
defer func() {
_ = remoteConn.Close()
}()
// use small value for TTL to check expiration of the address
udpMux.params.XORMappedAddrCacheTTL = time.Millisecond * 20
testXORIP := net.ParseIP("213.141.156.236")
testXORPort := 21254
wg := sync.WaitGroup{}
wg.Add(1)
go func() {
defer wg.Done()
address, e := udpMux.GetXORMappedAddr(remoteConn.LocalAddr(), time.Second)
require.NoError(t, e)
require.NotNil(t, address)
require.True(t, address.IP.Equal(testXORIP))
require.Equal(t, address.Port, testXORPort)
}()
// wait until GetXORMappedAddr calls sendStun method
time.Sleep(time.Millisecond)
// check that mapped address filled correctly after sent stun
udpMux.mu.Lock()
mappedAddr, ok := udpMux.xorMappedMap[remoteConn.LocalAddr().String()]
require.True(t, ok)
require.NotNil(t, mappedAddr)
require.True(t, mappedAddr.pending())
require.False(t, mappedAddr.expired())
udpMux.mu.Unlock()
// clean receiver read buffer
buf := make([]byte, receiveMTU)
_, err = remoteConn.Read(buf)
require.NoError(t, err)
// write back to udpMux XOR message with address
msg := stun.New()
msg.Type = stun.MessageType{Method: stun.MethodBinding, Class: stun.ClassRequest}
msg.Add(stun.AttrUsername, []byte(ufrag+":otherufrag"))
addr := &stun.XORMappedAddress{
IP: testXORIP,
Port: testXORPort,
}
err = addr.AddTo(msg)
require.NoError(t, err)
msg.Encode()
_, err = remoteConn.Write(msg.Raw)
require.NoError(t, err)
// wait for the packet to be consumed and parsed by udpMux
wg.Wait()
// we should get address immediately from the cached map
address, err := udpMux.GetXORMappedAddr(remoteConn.LocalAddr(), time.Second)
require.NoError(t, err)
require.NotNil(t, address)
udpMux.mu.Lock()
// check mappedAddr is not pending, we didn't send stun twice
require.False(t, mappedAddr.pending())
// check expiration by TTL
time.Sleep(time.Millisecond * 21)
require.True(t, mappedAddr.expired())
udpMux.mu.Unlock()
// after expire, we send stun request again
// but we not receive response in 5 milliseconds and should get error here
address, err = udpMux.GetXORMappedAddr(remoteConn.LocalAddr(), time.Millisecond*5)
require.NotNil(t, err)
require.Nil(t, address)
}
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