-
Notifications
You must be signed in to change notification settings - Fork 434
/
peeked_conn.go
48 lines (42 loc) · 1.56 KB
/
peeked_conn.go
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
// Copyright 2017 Google Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// Originally from: https://github.com/google/tcpproxy/blob/master/tcpproxy.go
// at f5c09fbedceb69e4b238dec52cdf9f2fe9a815e2
package memberlist
import "net"
// peekedConn is an incoming connection that has had some bytes read from it
// to determine how to route the connection. The Read method stitches
// the peeked bytes and unread bytes back together.
type peekedConn struct {
// Peeked are the bytes that have been read from Conn for the
// purposes of route matching, but have not yet been consumed
// by Read calls. It set to nil by Read when fully consumed.
Peeked []byte
// Conn is the underlying connection.
// It can be type asserted against *net.TCPConn or other types
// as needed. It should not be read from directly unless
// Peeked is nil.
net.Conn
}
func (c *peekedConn) Read(p []byte) (n int, err error) {
if len(c.Peeked) > 0 {
n = copy(p, c.Peeked)
c.Peeked = c.Peeked[n:]
if len(c.Peeked) == 0 {
c.Peeked = nil
}
return n, nil
}
return c.Conn.Read(p)
}