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74 lines
1.3 KiB
Go
74 lines
1.3 KiB
Go
package protolistener
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import (
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"bufio"
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"net"
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log "github.com/fangdingjun/go-log/v5"
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proxyproto "github.com/pires/go-proxyproto"
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)
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type protoListener struct {
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net.Listener
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}
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type protoConn struct {
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net.Conn
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headerDone bool
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r *bufio.Reader
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proxy *proxyproto.Header
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err error
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}
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// New create a wrapped listener
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func New(l net.Listener) net.Listener {
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return &protoListener{l}
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}
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func (l *protoListener) Accept() (net.Conn, error) {
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c, err := l.Listener.Accept()
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if err != nil {
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return nil, err
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}
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return &protoConn{Conn: c}, err
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}
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func (c *protoConn) readHeader() error {
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var err error
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c.r = bufio.NewReader(c.Conn)
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c.proxy, err = proxyproto.Read(c.r)
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if err != nil && err != proxyproto.ErrNoProxyProtocol {
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c.err = err
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return err
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}
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return nil
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}
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func (c *protoConn) Read(buf []byte) (int, error) {
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if c.err != nil {
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return 0, c.err
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}
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if !c.headerDone {
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if err := c.readHeader(); err != nil {
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c.headerDone = true
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return 0, err
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}
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c.headerDone = true
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return c.r.Read(buf)
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}
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return c.r.Read(buf)
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}
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func (c *protoConn) RemoteAddr() net.Addr {
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if !c.headerDone {
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if err := c.readHeader(); err != nil {
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log.Errorln(err)
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}
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c.headerDone = true
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}
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if c.proxy == nil {
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return c.Conn.RemoteAddr()
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}
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return c.proxy.SourceAddr
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}
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