1// Copyright 2009 The Go Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style
3// license that can be found in the LICENSE file.
4
5package net
6
7import (
8	"context"
9	"io"
10	"os"
11)
12
13func (c *TCPConn) readFrom(r io.Reader) (int64, error) {
14	return genericReadFrom(c, r)
15}
16
17func dialTCP(ctx context.Context, net string, laddr, raddr *TCPAddr) (*TCPConn, error) {
18	if testHookDialTCP != nil {
19		return testHookDialTCP(ctx, net, laddr, raddr)
20	}
21	return doDialTCP(ctx, net, laddr, raddr)
22}
23
24func doDialTCP(ctx context.Context, net string, laddr, raddr *TCPAddr) (*TCPConn, error) {
25	switch net {
26	case "tcp", "tcp4", "tcp6":
27	default:
28		return nil, UnknownNetworkError(net)
29	}
30	if raddr == nil {
31		return nil, errMissingAddress
32	}
33	fd, err := dialPlan9(ctx, net, laddr, raddr)
34	if err != nil {
35		return nil, err
36	}
37	return newTCPConn(fd), nil
38}
39
40func (ln *TCPListener) ok() bool { return ln != nil && ln.fd != nil && ln.fd.ctl != nil }
41
42func (ln *TCPListener) accept() (*TCPConn, error) {
43	fd, err := ln.fd.acceptPlan9()
44	if err != nil {
45		return nil, err
46	}
47	return newTCPConn(fd), nil
48}
49
50func (ln *TCPListener) close() error {
51	if err := ln.fd.pfd.Close(); err != nil {
52		return err
53	}
54	if _, err := ln.fd.ctl.WriteString("hangup"); err != nil {
55		ln.fd.ctl.Close()
56		return err
57	}
58	if err := ln.fd.ctl.Close(); err != nil {
59		return err
60	}
61	return nil
62}
63
64func (ln *TCPListener) file() (*os.File, error) {
65	f, err := ln.dup()
66	if err != nil {
67		return nil, err
68	}
69	return f, nil
70}
71
72func listenTCP(ctx context.Context, network string, laddr *TCPAddr) (*TCPListener, error) {
73	fd, err := listenPlan9(ctx, network, laddr)
74	if err != nil {
75		return nil, err
76	}
77	return &TCPListener{fd}, nil
78}
79