feat: add vendor

vendor/github.com/farsightsec/golang-framestream/timeout.go

@@ -0,0 +1,67 @@
+package framestream
+
+import (
+	"io"
+	"net"
+	"time"
+)
+
+type timeoutConn struct {
+	conn                      net.Conn
+	readTimeout, writeTimeout time.Duration
+}
+
+func (toc *timeoutConn) Write(b []byte) (int, error) {
+	if toc.writeTimeout != 0 {
+		toc.conn.SetWriteDeadline(time.Now().Add(toc.writeTimeout))
+	}
+	return toc.conn.Write(b)
+}
+
+func (toc *timeoutConn) Read(b []byte) (int, error) {
+	if toc.readTimeout != 0 {
+		toc.conn.SetReadDeadline(time.Now().Add(toc.readTimeout))
+	}
+	return toc.conn.Read(b)
+}
+
+func timeoutWriter(w io.Writer, opt *WriterOptions) io.Writer {
+	if !opt.Bidirectional {
+		return w
+	}
+	if opt.Timeout == 0 {
+		return w
+	}
+	if c, ok := w.(net.Conn); ok {
+		return &timeoutConn{
+			conn:         c,
+			readTimeout:  opt.Timeout,
+			writeTimeout: opt.Timeout,
+		}
+	}
+	return w
+}
+
+func timeoutReader(r io.Reader, opt *ReaderOptions) io.Reader {
+	if !opt.Bidirectional {
+		return r
+	}
+	if opt.Timeout == 0 {
+		return r
+	}
+	if c, ok := r.(net.Conn); ok {
+		return &timeoutConn{
+			conn:         c,
+			readTimeout:  opt.Timeout,
+			writeTimeout: opt.Timeout,
+		}
+	}
+	return r
+}
+
+func disableReadTimeout(r io.Reader) {
+	if tc, ok := r.(*timeoutConn); ok {
+		tc.readTimeout = 0
+		tc.conn.SetReadDeadline(time.Time{})
+	}
+}