Make IPC option symbols available everywhere.

This reduces some friction when using these options in
code that may be built for different platforms.

transport/ipc/ipc_options.go

@@ -0,0 +1,59 @@
+// +build !windows,!plan9,!js
+
+// Copyright 2019 The Mangos Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use 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.
+
+package ipc
+
+const (
+	// OptionIpcSocketPermissions is used to set the permissions on the
+	// UNIX domain socket via chmod.  The argument is a uint32, and
+	// represents the mode passed to chmod().  This is
+	// done on the server side.  Be aware that relying on
+	// socket permissions for enforcement is not portable.
+	OptionIpcSocketPermissions = "UNIX-IPC-CHMOD"
+
+	// OptionIpcSocketOwner is used to set the socket owner by
+	// using chown on the server socket.  This will only work if
+	// the process has permission.   The argument is an int.
+	// If this fails to set at socket creation time,
+	// no error is reported.
+	OptionIpcSocketOwner = "UNIX-IPC-OWNER"
+
+	// OptionIpcSocketGroup is used to set the socket group by
+	// using chown on the server socket.  This will only work if
+	// the process has permission.   The argument is an int.
+	// If this fails to set at socket creation time,
+	// no error is reported.
+	OptionIpcSocketGroup = "UNIX-IPC-GROUP"
+
+	// OptionSecurityDescriptor represents a Windows security
+	// descriptor in SDDL format (string).  This can only be set on
+	// a Listener, and must be set before the Listen routine
+	// is called.
+	OptionSecurityDescriptor = "WIN-IPC-SECURITY-DESCRIPTOR"
+
+	// OptionInputBufferSize represents the Windows Named Pipe
+	// input buffer size in bytes (type int32).  Default is 4096.
+	// This is only for Listeners, and must be set before the
+	// Listener is started.
+	OptionInputBufferSize = "WIN-IPC-INPUT-BUFFER-SIZE"
+
+	// OptionOutputBufferSize represents the Windows Named Pipe
+	// output buffer size in bytes (type int32).  Default is 4096.
+	// This is only for Listeners, and must be set before the
+	// Listener is started.
+	OptionOutputBufferSize = "WIN-IPC-OUTPUT-BUFFER-SIZE"
+)
+

transport/ipc/ipc_unix.go

@@ -34,29 +34,6 @@ const (
 	Transport = ipcTran(0)
 )
 
-const (
-	// OptionIpcSocketPermissions is used to set the permissions on the
-	// UNIX domain socket via chmod.  The argument is a uint32, and
-	// represents the mode passed to chmod().  This is
-	// done on the server side.  Be aware that relying on
-	// socket permissions for enforcement is not portable.
-	OptionIpcSocketPermissions = "UNIX-IPC-CHMOD"
-
-	// OptionIpcSocketOwner is used to set the socket owner by
-	// using chown on the server socket.  This will only work if
-	// the process has permission.   The argument is an int.
-	// If this fails to set at socket creation time,
-	// no error is reported.
-	OptionIpcSocketOwner = "UNIX-IPC-OWNER"
-
-	// OptionIpcSocketGroup is used to set the socket group by
-	// using chown on the server socket.  This will only work if
-	// the process has permission.   The argument is an int.
-	// If this fails to set at socket creation time,
-	// no error is reported.
-	OptionIpcSocketGroup = "UNIX-IPC-GROUP"
-)
-
 func init() {
 	transport.RegisterTransport(Transport)
 }

transport/ipc/ipc_windows.go

@@ -34,28 +34,6 @@ func init() {
 	transport.RegisterTransport(Transport)
 }
 
-// The options here are pretty specific to Windows Named Pipes.
-
-const (
-	// OptionSecurityDescriptor represents a Windows security
-	// descriptor in SDDL format (string).  This can only be set on
-	// a Listener, and must be set before the Listen routine
-	// is called.
-	OptionSecurityDescriptor = "WIN-IPC-SECURITY-DESCRIPTOR"
-
-	// OptionInputBufferSize represents the Windows Named Pipe
-	// input buffer size in bytes (type int32).  Default is 4096.
-	// This is only for Listeners, and must be set before the
-	// Listener is started.
-	OptionInputBufferSize = "WIN-IPC-INPUT-BUFFER-SIZE"
-
-	// OptionOutputBufferSize represents the Windows Named Pipe
-	// output buffer size in bytes (type int32).  Default is 4096.
-	// This is only for Listeners, and must be set before the
-	// Listener is started.
-	OptionOutputBufferSize = "WIN-IPC-OUTPUT-BUFFER-SIZE"
-)
-
 type dialer struct {
 	path        string
 	proto       transport.ProtocolInfo