1 files changed, 55 insertions, 0 deletions
diff --git a/p2p/simulations/pipes/pipes.go b/p2p/simulations/pipes/pipes.go
new file mode 100644
index 000000000..8532c1bcf
--- /dev/null
+++ b/p2p/simulations/pipes/pipes.go
@@ -0,0 +1,55 @@
+// Copyright 2017 The go-ethereum Authors
+// This file is part of the go-ethereum library.
+//
+// The go-ethereum library is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Lesser General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// The go-ethereum library 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 Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public License
+// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
+
+package pipes
+
+import (
+	"net"
+)
+
+// NetPipe wraps net.Pipe in a signature returning an error
+func NetPipe() (net.Conn, net.Conn, error) {
+	p1, p2 := net.Pipe()
+	return p1, p2, nil
+}
+
+// TCPPipe creates an in process full duplex pipe based on a localhost TCP socket
+func TCPPipe() (net.Conn, net.Conn, error) {
+	l, err := net.Listen("tcp", "127.0.0.1:0")
+	if err != nil {
+		return nil, nil, err
+	}
+	defer l.Close()
+
+	var aconn net.Conn
+	aerr := make(chan error, 1)
+	go func() {
+		var err error
+		aconn, err = l.Accept()
+		aerr <- err
+	}()
+
+	dconn, err := net.Dial("tcp", l.Addr().String())
+	if err != nil {
+		<-aerr
+		return nil, nil, err
+	}
+	if err := <-aerr; err != nil {
+		dconn.Close()
+		return nil, nil, err
+	}
+	return aconn, dconn, nil
+}