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Name	Size	Permission
diag_test.go	6.56 KB	-r--r--r--
dstunreach.go	1.52 KB	-r--r--r--
echo.go	4.23 KB	-r--r--r--
endpoint.go	2.65 KB	-r--r--r--
example_test.go	1.28 KB	-r--r--r--
extension.go	4.18 KB	-r--r--r--
extension_test.go	7.99 KB	-r--r--r--
helper_posix.go	1.58 KB	-r--r--r--
interface.go	7.68 KB	-r--r--r--
ipv4.go	1.98 KB	-r--r--r--
ipv4_test.go	1.69 KB	-r--r--r--
ipv6.go	553 B	-r--r--r--
listen_posix.go	2.83 KB	-r--r--r--
listen_stub.go	1.19 KB	-r--r--r--
message.go	4.86 KB	-r--r--r--
message_test.go	7.73 KB	-r--r--r--
messagebody.go	1.41 KB	-r--r--r--
mpls.go	1.88 KB	-r--r--r--
multipart.go	3.57 KB	-r--r--r--
multipart_test.go	13.51 KB	-r--r--r--
packettoobig.go	1.17 KB	-r--r--r--
paramprob.go	1.89 KB	-r--r--r--
sys_freebsd.go	268 B	-r--r--r--
timeexceeded.go	1.49 KB	-r--r--r--

Code Editor : endpoint.go

// Copyright 2014 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.

package icmp

import (
	"net"
	"runtime"
	"time"

"golang.org/x/net/ipv4"
	"golang.org/x/net/ipv6"
)

var _ net.PacketConn = &PacketConn{}

// A PacketConn represents a packet network endpoint that uses either
// ICMPv4 or ICMPv6.
type PacketConn struct {
	c  net.PacketConn
	p4 *ipv4.PacketConn
	p6 *ipv6.PacketConn
}

func (c *PacketConn) ok() bool { return c != nil && c.c != nil }

// IPv4PacketConn returns the ipv4.PacketConn of c.
// It returns nil when c is not created as the endpoint for ICMPv4.
func (c *PacketConn) IPv4PacketConn() *ipv4.PacketConn {
	if !c.ok() {
		return nil
	}
	return c.p4
}

// IPv6PacketConn returns the ipv6.PacketConn of c.
// It returns nil when c is not created as the endpoint for ICMPv6.
func (c *PacketConn) IPv6PacketConn() *ipv6.PacketConn {
	if !c.ok() {
		return nil
	}
	return c.p6
}

// ReadFrom reads an ICMP message from the connection.
func (c *PacketConn) ReadFrom(b []byte) (int, net.Addr, error) {
	if !c.ok() {
		return 0, nil, errInvalidConn
	}
	// Please be informed that ipv4.NewPacketConn enables
	// IP_STRIPHDR option by default on Darwin.
	// See golang.org/issue/9395 for further information.
	if (runtime.GOOS == "darwin" || runtime.GOOS == "ios") && c.p4 != nil {
		n, _, peer, err := c.p4.ReadFrom(b)
		return n, peer, err
	}
	return c.c.ReadFrom(b)
}

// WriteTo writes the ICMP message b to dst.
// The provided dst must be net.UDPAddr when c is a non-privileged
// datagram-oriented ICMP endpoint.
// Otherwise it must be net.IPAddr.
func (c *PacketConn) WriteTo(b []byte, dst net.Addr) (int, error) {
	if !c.ok() {
		return 0, errInvalidConn
	}
	return c.c.WriteTo(b, dst)
}

// Close closes the endpoint.
func (c *PacketConn) Close() error {
	if !c.ok() {
		return errInvalidConn
	}
	return c.c.Close()
}

// LocalAddr returns the local network address.
func (c *PacketConn) LocalAddr() net.Addr {
	if !c.ok() {
		return nil
	}
	return c.c.LocalAddr()
}

// SetDeadline sets the read and write deadlines associated with the
// endpoint.
func (c *PacketConn) SetDeadline(t time.Time) error {
	if !c.ok() {
		return errInvalidConn
	}
	return c.c.SetDeadline(t)
}

// SetReadDeadline sets the read deadline associated with the
// endpoint.
func (c *PacketConn) SetReadDeadline(t time.Time) error {
	if !c.ok() {
		return errInvalidConn
	}
	return c.c.SetReadDeadline(t)
}

// SetWriteDeadline sets the write deadline associated with the
// endpoint.
func (c *PacketConn) SetWriteDeadline(t time.Time) error {
	if !c.ok() {
		return errInvalidConn
	}
	return c.c.SetWriteDeadline(t)
}

${this.title}

Code Editor : endpoint.go