github.com/ethereum/go-ethereum@v1.16.1/p2p/transport_test.go (about)

     1  // Copyright 2020 The go-ethereum Authors
     2  // This file is part of the go-ethereum library.
     3  //
     4  // The go-ethereum library is free software: you can redistribute it and/or modify
     5  // it under the terms of the GNU Lesser General Public License as published by
     6  // the Free Software Foundation, either version 3 of the License, or
     7  // (at your option) any later version.
     8  //
     9  // The go-ethereum library is distributed in the hope that it will be useful,
    10  // but WITHOUT ANY WARRANTY; without even the implied warranty of
    11  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
    12  // GNU Lesser General Public License for more details.
    13  //
    14  // You should have received a copy of the GNU Lesser General Public License
    15  // along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
    16  
    17  package p2p
    18  
    19  import (
    20  	"errors"
    21  	"reflect"
    22  	"sync"
    23  	"testing"
    24  
    25  	"github.com/davecgh/go-spew/spew"
    26  	"github.com/ethereum/go-ethereum/crypto"
    27  	"github.com/ethereum/go-ethereum/p2p/pipes"
    28  )
    29  
    30  func TestProtocolHandshake(t *testing.T) {
    31  	var (
    32  		prv0, _ = crypto.GenerateKey()
    33  		pub0    = crypto.FromECDSAPub(&prv0.PublicKey)[1:]
    34  		hs0     = &protoHandshake{Version: 3, ID: pub0, Caps: []Cap{{"a", 0}, {"b", 2}}}
    35  
    36  		prv1, _ = crypto.GenerateKey()
    37  		pub1    = crypto.FromECDSAPub(&prv1.PublicKey)[1:]
    38  		hs1     = &protoHandshake{Version: 3, ID: pub1, Caps: []Cap{{"c", 1}, {"d", 3}}}
    39  
    40  		wg sync.WaitGroup
    41  	)
    42  
    43  	fd0, fd1, err := pipes.TCPPipe()
    44  	if err != nil {
    45  		t.Fatal(err)
    46  	}
    47  
    48  	wg.Add(2)
    49  	go func() {
    50  		defer wg.Done()
    51  		defer fd0.Close()
    52  		frame := newRLPX(fd0, &prv1.PublicKey)
    53  		rpubkey, err := frame.doEncHandshake(prv0)
    54  		if err != nil {
    55  			t.Errorf("dial side enc handshake failed: %v", err)
    56  			return
    57  		}
    58  		if !reflect.DeepEqual(rpubkey, &prv1.PublicKey) {
    59  			t.Errorf("dial side remote pubkey mismatch: got %v, want %v", rpubkey, &prv1.PublicKey)
    60  			return
    61  		}
    62  
    63  		phs, err := frame.doProtoHandshake(hs0)
    64  		if err != nil {
    65  			t.Errorf("dial side proto handshake error: %v", err)
    66  			return
    67  		}
    68  		phs.Rest = nil
    69  		if !reflect.DeepEqual(phs, hs1) {
    70  			t.Errorf("dial side proto handshake mismatch:\ngot: %s\nwant: %s\n", spew.Sdump(phs), spew.Sdump(hs1))
    71  			return
    72  		}
    73  		frame.close(DiscQuitting)
    74  	}()
    75  	go func() {
    76  		defer wg.Done()
    77  		defer fd1.Close()
    78  		rlpx := newRLPX(fd1, nil)
    79  		rpubkey, err := rlpx.doEncHandshake(prv1)
    80  		if err != nil {
    81  			t.Errorf("listen side enc handshake failed: %v", err)
    82  			return
    83  		}
    84  		if !reflect.DeepEqual(rpubkey, &prv0.PublicKey) {
    85  			t.Errorf("listen side remote pubkey mismatch: got %v, want %v", rpubkey, &prv0.PublicKey)
    86  			return
    87  		}
    88  
    89  		phs, err := rlpx.doProtoHandshake(hs1)
    90  		if err != nil {
    91  			t.Errorf("listen side proto handshake error: %v", err)
    92  			return
    93  		}
    94  		phs.Rest = nil
    95  		if !reflect.DeepEqual(phs, hs0) {
    96  			t.Errorf("listen side proto handshake mismatch:\ngot: %s\nwant: %s\n", spew.Sdump(phs), spew.Sdump(hs0))
    97  			return
    98  		}
    99  
   100  		if err := ExpectMsg(rlpx, discMsg, []any{DiscQuitting}); err != nil {
   101  			t.Errorf("error receiving disconnect: %v", err)
   102  		}
   103  	}()
   104  	wg.Wait()
   105  }
   106  
   107  func TestProtocolHandshakeErrors(t *testing.T) {
   108  	tests := []struct {
   109  		code uint64
   110  		msg  interface{}
   111  		err  error
   112  	}{
   113  		{
   114  			code: discMsg,
   115  			msg:  []any{DiscQuitting},
   116  			err:  DiscQuitting,
   117  		},
   118  		{
   119  			// legacy disconnect encoding as byte array
   120  			code: discMsg,
   121  			msg:  []byte{byte(DiscQuitting)},
   122  			err:  DiscQuitting,
   123  		},
   124  		{
   125  			code: 0x989898,
   126  			msg:  []byte{1},
   127  			err:  errors.New("expected handshake, got 989898"),
   128  		},
   129  		{
   130  			code: handshakeMsg,
   131  			msg:  make([]byte, baseProtocolMaxMsgSize+2),
   132  			err:  errors.New("message too big"),
   133  		},
   134  		{
   135  			code: handshakeMsg,
   136  			msg:  []byte{1, 2, 3},
   137  			err:  newPeerError(errInvalidMsg, "(code 0) (size 4) rlp: expected input list for p2p.protoHandshake"),
   138  		},
   139  		{
   140  			code: handshakeMsg,
   141  			msg:  &protoHandshake{Version: 3},
   142  			err:  DiscInvalidIdentity,
   143  		},
   144  	}
   145  
   146  	for i, test := range tests {
   147  		p1, p2 := MsgPipe()
   148  		go Send(p1, test.code, test.msg)
   149  		_, err := readProtocolHandshake(p2)
   150  		if !reflect.DeepEqual(err, test.err) {
   151  			t.Errorf("test %d: error mismatch: got %q, want %q", i, err, test.err)
   152  		}
   153  	}
   154  }