123 lines
3.3 KiB
Go
123 lines
3.3 KiB
Go
// Copyright 2013 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
|
|
|
|
package ipv6
|
|
|
|
import (
|
|
"net"
|
|
"os"
|
|
"unsafe"
|
|
)
|
|
|
|
func getInt(fd int, opt *sockOpt) (int, error) {
|
|
if opt.name < 1 || opt.typ != ssoTypeInt {
|
|
return 0, errOpNoSupport
|
|
}
|
|
var i int32
|
|
l := sysSockoptLen(4)
|
|
if err := getsockopt(fd, opt.level, opt.name, unsafe.Pointer(&i), &l); err != nil {
|
|
return 0, os.NewSyscallError("getsockopt", err)
|
|
}
|
|
return int(i), nil
|
|
}
|
|
|
|
func setInt(fd int, opt *sockOpt, v int) error {
|
|
if opt.name < 1 || opt.typ != ssoTypeInt {
|
|
return errOpNoSupport
|
|
}
|
|
i := int32(v)
|
|
return os.NewSyscallError("setsockopt", setsockopt(fd, opt.level, opt.name, unsafe.Pointer(&i), sysSockoptLen(4)))
|
|
}
|
|
|
|
func getInterface(fd int, opt *sockOpt) (*net.Interface, error) {
|
|
if opt.name < 1 || opt.typ != ssoTypeInterface {
|
|
return nil, errOpNoSupport
|
|
}
|
|
var i int32
|
|
l := sysSockoptLen(4)
|
|
if err := getsockopt(fd, opt.level, opt.name, unsafe.Pointer(&i), &l); err != nil {
|
|
return nil, os.NewSyscallError("getsockopt", err)
|
|
}
|
|
if i == 0 {
|
|
return nil, nil
|
|
}
|
|
ifi, err := net.InterfaceByIndex(int(i))
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
return ifi, nil
|
|
}
|
|
|
|
func setInterface(fd int, opt *sockOpt, ifi *net.Interface) error {
|
|
if opt.name < 1 || opt.typ != ssoTypeInterface {
|
|
return errOpNoSupport
|
|
}
|
|
var i int32
|
|
if ifi != nil {
|
|
i = int32(ifi.Index)
|
|
}
|
|
return os.NewSyscallError("setsockopt", setsockopt(fd, opt.level, opt.name, unsafe.Pointer(&i), sysSockoptLen(4)))
|
|
}
|
|
|
|
func getICMPFilter(fd int, opt *sockOpt) (*ICMPFilter, error) {
|
|
if opt.name < 1 || opt.typ != ssoTypeICMPFilter {
|
|
return nil, errOpNoSupport
|
|
}
|
|
var f ICMPFilter
|
|
l := sysSockoptLen(sysSizeofICMPv6Filter)
|
|
if err := getsockopt(fd, opt.level, opt.name, unsafe.Pointer(&f.sysICMPv6Filter), &l); err != nil {
|
|
return nil, os.NewSyscallError("getsockopt", err)
|
|
}
|
|
return &f, nil
|
|
}
|
|
|
|
func setICMPFilter(fd int, opt *sockOpt, f *ICMPFilter) error {
|
|
if opt.name < 1 || opt.typ != ssoTypeICMPFilter {
|
|
return errOpNoSupport
|
|
}
|
|
return os.NewSyscallError("setsockopt", setsockopt(fd, opt.level, opt.name, unsafe.Pointer(&f.sysICMPv6Filter), sysSizeofICMPv6Filter))
|
|
}
|
|
|
|
func getMTUInfo(fd int, opt *sockOpt) (*net.Interface, int, error) {
|
|
if opt.name < 1 || opt.typ != ssoTypeMTUInfo {
|
|
return nil, 0, errOpNoSupport
|
|
}
|
|
var mi sysIPv6Mtuinfo
|
|
l := sysSockoptLen(sysSizeofIPv6Mtuinfo)
|
|
if err := getsockopt(fd, opt.level, opt.name, unsafe.Pointer(&mi), &l); err != nil {
|
|
return nil, 0, os.NewSyscallError("getsockopt", err)
|
|
}
|
|
if mi.Addr.Scope_id == 0 {
|
|
return nil, int(mi.Mtu), nil
|
|
}
|
|
ifi, err := net.InterfaceByIndex(int(mi.Addr.Scope_id))
|
|
if err != nil {
|
|
return nil, 0, err
|
|
}
|
|
return ifi, int(mi.Mtu), nil
|
|
}
|
|
|
|
func setGroup(fd int, opt *sockOpt, ifi *net.Interface, grp net.IP) error {
|
|
if opt.name < 1 {
|
|
return errOpNoSupport
|
|
}
|
|
switch opt.typ {
|
|
case ssoTypeIPMreq:
|
|
return setsockoptIPMreq(fd, opt, ifi, grp)
|
|
case ssoTypeGroupReq:
|
|
return setsockoptGroupReq(fd, opt, ifi, grp)
|
|
default:
|
|
return errOpNoSupport
|
|
}
|
|
}
|
|
|
|
func setSourceGroup(fd int, opt *sockOpt, ifi *net.Interface, grp, src net.IP) error {
|
|
if opt.name < 1 || opt.typ != ssoTypeGroupSourceReq {
|
|
return errOpNoSupport
|
|
}
|
|
return setsockoptGroupSourceReq(fd, opt, ifi, grp, src)
|
|
}
|