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