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Merge pull request #181 from r4f4ss/stun
Add stun server for ip discovery and flag stun
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,33 @@ | ||
| package main | ||
|
|
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| import ( | ||
| "net" | ||
| "testing" | ||
|
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| "github.com/ethereum/go-ethereum/crypto" | ||
| "github.com/ethereum/go-ethereum/p2p/enode" | ||
| "github.com/ethereum/go-ethereum/p2p/nat" | ||
| "github.com/stretchr/testify/assert" | ||
| ) | ||
|
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| func newLocalNodeForTesting() (*enode.LocalNode, *enode.DB) { | ||
| db, _ := enode.OpenDB("") | ||
| key, _ := crypto.GenerateKey() | ||
| return enode.NewLocalNode(db, key), db | ||
| } | ||
|
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| func TestDoPortMapping(t *testing.T) { | ||
| nat := nat.ExtIP{33, 44, 55, 66} | ||
| localNode, _ := newLocalNodeForTesting() | ||
| listenerAddr := &net.UDPAddr{IP: net.IP{127, 0, 0, 1}, Port: 1234} | ||
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| doPortMapping(nat, localNode, listenerAddr) | ||
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| assert.Equal(t, localNode.Seq(), uint64(1)) | ||
| assert.Equal(t, localNode.Node().IP(), net.IP{33, 44, 55, 66}) | ||
| assert.Equal(t, localNode.Node().UDP(), 1234) | ||
| assert.Equal(t, localNode.Node().TCP(), 0) | ||
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| _ = localNode.Node().UDP() | ||
| assert.Equal(t, localNode.Seq(), uint64(2)) | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,67 @@ | ||
| package nat | ||
|
|
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| import ( | ||
| "fmt" | ||
| "net" | ||
| "time" | ||
|
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| "github.com/pion/stun" | ||
| ) | ||
|
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| const STUNDefaultServerAddr = "159.223.0.83:3478" | ||
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| type STUN struct { | ||
| serverAddr string | ||
| } | ||
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| func NewSTUN(serverAddr string) STUN { | ||
| if serverAddr == "" { | ||
| serverAddr = STUNDefaultServerAddr | ||
| } | ||
| return STUN{serverAddr: serverAddr} | ||
| } | ||
|
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| func (s STUN) String() string { | ||
| return fmt.Sprintf("STUN(%s)", s.serverAddr) | ||
| } | ||
|
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| func (STUN) SupportsMapping() bool { | ||
| return false | ||
| } | ||
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| func (STUN) AddMapping(protocol string, extport, intport int, name string, lifetime time.Duration) (uint16, error) { | ||
| return uint16(extport), nil | ||
| } | ||
|
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| func (STUN) DeleteMapping(string, int, int) error { | ||
| return nil | ||
| } | ||
|
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| func (s STUN) ExternalIP() (net.IP, error) { | ||
| conn, err := stun.Dial("udp4", s.serverAddr) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| defer func() { | ||
| _ = conn.Close() | ||
| }() | ||
|
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| message := stun.MustBuild(stun.TransactionID, stun.BindingRequest) | ||
| var response *stun.Event | ||
| err = conn.Do(message, func(event stun.Event) { | ||
| response = &event | ||
| }) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| if response.Error != nil { | ||
| return nil, response.Error | ||
| } | ||
|
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| var mappedAddr stun.XORMappedAddress | ||
| if err := mappedAddr.GetFrom(response.Message); err != nil { | ||
| return nil, err | ||
| } | ||
|
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| return mappedAddr.IP, nil | ||
| } |