Add vendor folder to git

vendor/golang.org/x/net/ipv4/sockopt_posix.go

@@ -0,0 +1,122 @@
+// Copyright 2012 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 darwin dragonfly freebsd linux netbsd openbsd solaris windows
+
+package ipv4
+
+import (
+	"net"
+	"os"
+	"unsafe"
+
+	"golang.org/x/net/internal/iana"
+)
+
+func getInt(s uintptr, opt *sockOpt) (int, error) {
+	if opt.name < 1 || (opt.typ != ssoTypeByte && opt.typ != ssoTypeInt) {
+		return 0, errOpNoSupport
+	}
+	var i int32
+	var b byte
+	p := unsafe.Pointer(&i)
+	l := uint32(4)
+	if opt.typ == ssoTypeByte {
+		p = unsafe.Pointer(&b)
+		l = 1
+	}
+	if err := getsockopt(s, iana.ProtocolIP, opt.name, p, &l); err != nil {
+		return 0, os.NewSyscallError("getsockopt", err)
+	}
+	if opt.typ == ssoTypeByte {
+		return int(b), nil
+	}
+	return int(i), nil
+}
+
+func setInt(s uintptr, opt *sockOpt, v int) error {
+	if opt.name < 1 || (opt.typ != ssoTypeByte && opt.typ != ssoTypeInt) {
+		return errOpNoSupport
+	}
+	i := int32(v)
+	var b byte
+	p := unsafe.Pointer(&i)
+	l := uint32(4)
+	if opt.typ == ssoTypeByte {
+		b = byte(v)
+		p = unsafe.Pointer(&b)
+		l = 1
+	}
+	return os.NewSyscallError("setsockopt", setsockopt(s, iana.ProtocolIP, opt.name, p, l))
+}
+
+func getInterface(s uintptr, opt *sockOpt) (*net.Interface, error) {
+	if opt.name < 1 {
+		return nil, errOpNoSupport
+	}
+	switch opt.typ {
+	case ssoTypeInterface:
+		return getsockoptInterface(s, opt.name)
+	case ssoTypeIPMreqn:
+		return getsockoptIPMreqn(s, opt.name)
+	default:
+		return nil, errOpNoSupport
+	}
+}
+
+func setInterface(s uintptr, opt *sockOpt, ifi *net.Interface) error {
+	if opt.name < 1 {
+		return errOpNoSupport
+	}
+	switch opt.typ {
+	case ssoTypeInterface:
+		return setsockoptInterface(s, opt.name, ifi)
+	case ssoTypeIPMreqn:
+		return setsockoptIPMreqn(s, opt.name, ifi, nil)
+	default:
+		return errOpNoSupport
+	}
+}
+
+func getICMPFilter(s uintptr, opt *sockOpt) (*ICMPFilter, error) {
+	if opt.name < 1 || opt.typ != ssoTypeICMPFilter {
+		return nil, errOpNoSupport
+	}
+	var f ICMPFilter
+	l := uint32(sizeofICMPFilter)
+	if err := getsockopt(s, iana.ProtocolReserved, opt.name, unsafe.Pointer(&f.icmpFilter), &l); err != nil {
+		return nil, os.NewSyscallError("getsockopt", err)
+	}
+	return &f, nil
+}
+
+func setICMPFilter(s uintptr, opt *sockOpt, f *ICMPFilter) error {
+	if opt.name < 1 || opt.typ != ssoTypeICMPFilter {
+		return errOpNoSupport
+	}
+	return os.NewSyscallError("setsockopt", setsockopt(s, iana.ProtocolReserved, opt.name, unsafe.Pointer(&f.icmpFilter), sizeofICMPFilter))
+}
+
+func setGroup(s uintptr, opt *sockOpt, ifi *net.Interface, grp net.IP) error {
+	if opt.name < 1 {
+		return errOpNoSupport
+	}
+	switch opt.typ {
+	case ssoTypeIPMreq:
+		return setsockoptIPMreq(s, opt.name, ifi, grp)
+	case ssoTypeIPMreqn:
+		return setsockoptIPMreqn(s, opt.name, ifi, grp)
+	case ssoTypeGroupReq:
+		return setsockoptGroupReq(s, opt.name, ifi, grp)
+	default:
+		return errOpNoSupport
+	}
+}
+
+func setSourceGroup(s uintptr, opt *sockOpt, ifi *net.Interface, grp, src net.IP) error {
+	if opt.name < 1 || opt.typ != ssoTypeGroupSourceReq {
+		return errOpNoSupport
+	}
+	return setsockoptGroupSourceReq(s, opt.name, ifi, grp, src)
+}