+/*
+NNCP -- Node to Node copy, utilities for store-and-forward data exchange
+Copyright (C) 2016-2021 Sergey Matveev <stargrave@stargrave.org>
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, version 3 of the License.
+
+This program 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 General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+package nncp
+
+import (
+ "fmt"
+ "os"
+ "time"
+)
+
+const UCSPITCPClient = "UCSPI-TCP-CLIENT"
+
+type UCSPIConn struct {
+ R *os.File
+ W *os.File
+}
+
+func (c UCSPIConn) Read(p []byte) (n int, err error) {
+ return c.R.Read(p)
+}
+
+func (c UCSPIConn) Write(p []byte) (n int, err error) {
+ return c.W.Write(p)
+}
+
+func (c UCSPIConn) SetReadDeadline(t time.Time) error {
+ return c.R.SetReadDeadline(t)
+}
+
+func (c UCSPIConn) SetWriteDeadline(t time.Time) error {
+ return c.W.SetWriteDeadline(t)
+}
+
+func (c UCSPIConn) Close() error {
+ if err := c.R.Close(); err != nil {
+ c.W.Close()
+ return err
+ }
+ return c.W.Close()
+}
+
+func UCSPITCPRemoteAddr() (addr string) {
+ if proto := os.Getenv("PROTO"); proto == "TCP" {
+ port := os.Getenv("TCPREMOTEPORT")
+ if host := os.Getenv("TCPREMOTEHOST"); host == "" {
+ addr = fmt.Sprintf("[%s]:%s", os.Getenv("TCPREMOTEIP"), port)
+ } else {
+ addr = fmt.Sprintf("%s:%s", host, port)
+ }
+ }
+ return
+}