1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
|
// Copyright (C) 2019-2023 Algorand, Inc.
// This file is part of go-algorand
//
// go-algorand is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as
// published by the Free Software Foundation, either version 3 of the
// License, or (at your option) any later version.
//
// go-algorand is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with go-algorand. If not, see <https://www.gnu.org/licenses/>.
package network
import (
"encoding/binary"
"fmt"
"io"
"net"
"time"
"github.com/algorand/go-algorand/logging"
"github.com/algorand/websocket"
"github.com/libp2p/go-libp2p/core/network"
yamux "github.com/libp2p/go-yamux/v4"
mnet "github.com/multiformats/go-multiaddr/net"
)
type wsPeerConnP2PImpl struct {
stream network.Stream
}
func (c *wsPeerConnP2PImpl) RemoteAddrString() string {
return c.stream.Conn().RemoteMultiaddr().String()
}
func (c *wsPeerConnP2PImpl) NextReader() (int, io.Reader, error) {
// read length
var lenbuf [4]byte
_, err := io.ReadFull(c.stream, lenbuf[:])
if err != nil {
return 0, nil, err
}
msglen := binary.BigEndian.Uint32(lenbuf[:])
if msglen > MaxMessageLength {
return 0, nil, fmt.Errorf("message too long: %d", msglen)
}
// return io.Reader that only reads the next msglen bytes
return websocket.BinaryMessage, io.LimitReader(c.stream, int64(msglen)), nil
}
func (c *wsPeerConnP2PImpl) WriteMessage(_ int, buf []byte) error {
// simple message framing:
// 1. write encoding of the length
var lenbuf [4]byte
binary.BigEndian.PutUint32(lenbuf[:], uint32(len(buf)))
_, err := c.stream.Write(lenbuf[:])
if err != nil {
return err
}
// 2. write message
_, err = c.stream.Write(buf)
return err
}
// Do nothing for now since this doesn't actually close the connection just sends the close message
func (c *wsPeerConnP2PImpl) CloseWithMessage([]byte, time.Time) error {
return nil
}
func (c *wsPeerConnP2PImpl) SetReadLimit(int64) {}
func (c *wsPeerConnP2PImpl) CloseWithoutFlush() error {
err := c.stream.Close()
if err != nil && err != yamux.ErrStreamClosed && err != yamux.ErrSessionShutdown && err != yamux.ErrStreamReset {
return err
}
return nil
}
func (c *wsPeerConnP2PImpl) UnderlyingConn() net.Conn { return nil }
func (c *wsPeerConnP2PImpl) RemoteAddr() net.Addr {
netaddr, err := mnet.ToNetAddr(c.stream.Conn().RemoteMultiaddr())
if err != nil {
logging.Base().Errorf("Error converting multiaddr to netaddr: %v", err)
}
return netaddr
}
|
