summaryrefslogtreecommitdiffstats
path: root/vendor/golang.org/x/net/internal/socket/rawconn.go
blob: d6871d55f7268745a81e7454f6c33d16deab0608 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
// Copyright 2017 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

// +build go1.9

package socket

import (
	"errors"
	"net"
	"os"
	"syscall"
)

// A Conn represents a raw connection.
type Conn struct {
	network string
	c       syscall.RawConn
}

// NewConn returns a new raw connection.
func NewConn(c net.Conn) (*Conn, error) {
	var err error
	var cc Conn
	switch c := c.(type) {
	case *net.TCPConn:
		cc.network = "tcp"
		cc.c, err = c.SyscallConn()
	case *net.UDPConn:
		cc.network = "udp"
		cc.c, err = c.SyscallConn()
	case *net.IPConn:
		cc.network = "ip"
		cc.c, err = c.SyscallConn()
	default:
		return nil, errors.New("unknown connection type")
	}
	if err != nil {
		return nil, err
	}
	return &cc, nil
}

func (o *Option) get(c *Conn, b []byte) (int, error) {
	var operr error
	var n int
	fn := func(s uintptr) {
		n, operr = getsockopt(s, o.Level, o.Name, b)
	}
	if err := c.c.Control(fn); err != nil {
		return 0, err
	}
	return n, os.NewSyscallError("getsockopt", operr)
}

func (o *Option) set(c *Conn, b []byte) error {
	var operr error
	fn := func(s uintptr) {
		operr = setsockopt(s, o.Level, o.Name, b)
	}
	if err := c.c.Control(fn); err != nil {
		return err
	}
	return os.NewSyscallError("setsockopt", operr)
}