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// 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 ipv4
import ""
// Sticky socket options
const (
ssoTOS = iota // header field for unicast packet
ssoTTL // header field for unicast packet
ssoMulticastTTL // header field for multicast packet
ssoMulticastInterface // outbound interface for multicast packet
ssoMulticastLoopback // loopback for multicast packet
ssoReceiveTTL // header field on received packet
ssoReceiveDst // header field on received packet
ssoReceiveInterface // inbound interface on received packet
ssoPacketInfo // incbound or outbound packet path
ssoHeaderPrepend // ipv4 header prepend
ssoStripHeader // strip ipv4 header
ssoICMPFilter // icmp filter
ssoJoinGroup // any-source multicast
ssoLeaveGroup // any-source multicast
ssoJoinSourceGroup // source-specific multicast
ssoLeaveSourceGroup // source-specific multicast
ssoBlockSourceGroup // any-source or source-specific multicast
ssoUnblockSourceGroup // any-source or source-specific multicast
ssoAttachFilter // attach BPF for filtering inbound traffic
// Sticky socket option value types
const (
ssoTypeIPMreq = iota + 1
// A sockOpt represents a binding for sticky socket option.
type sockOpt struct {
typ int // hint for option value type; optional