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// 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)
}
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