123 lines
3.0 KiB
Go
123 lines
3.0 KiB
Go
// Copyright 2012 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// +build darwin dragonfly freebsd linux netbsd openbsd
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package ipv4
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import (
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"net"
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"os"
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"unsafe"
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"golang.org/x/net/internal/iana"
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)
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func getInt(fd int, opt *sockOpt) (int, error) {
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if opt.name < 1 || (opt.typ != ssoTypeByte && opt.typ != ssoTypeInt) {
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return 0, errOpNoSupport
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}
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var i int32
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var b byte
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p := unsafe.Pointer(&i)
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l := uint32(4)
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if opt.typ == ssoTypeByte {
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p = unsafe.Pointer(&b)
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l = 1
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}
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if err := getsockopt(fd, iana.ProtocolIP, opt.name, p, &l); err != nil {
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return 0, os.NewSyscallError("getsockopt", err)
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}
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if opt.typ == ssoTypeByte {
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return int(b), nil
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}
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return int(i), nil
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}
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func setInt(fd int, opt *sockOpt, v int) error {
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if opt.name < 1 || (opt.typ != ssoTypeByte && opt.typ != ssoTypeInt) {
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return errOpNoSupport
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}
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i := int32(v)
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var b byte
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p := unsafe.Pointer(&i)
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l := uint32(4)
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if opt.typ == ssoTypeByte {
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b = byte(v)
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p = unsafe.Pointer(&b)
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l = 1
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}
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return os.NewSyscallError("setsockopt", setsockopt(fd, iana.ProtocolIP, opt.name, p, l))
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}
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func getInterface(fd int, opt *sockOpt) (*net.Interface, error) {
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if opt.name < 1 {
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return nil, errOpNoSupport
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}
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switch opt.typ {
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case ssoTypeInterface:
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return getsockoptInterface(fd, opt.name)
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case ssoTypeIPMreqn:
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return getsockoptIPMreqn(fd, opt.name)
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default:
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return nil, errOpNoSupport
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}
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}
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func setInterface(fd int, opt *sockOpt, ifi *net.Interface) error {
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if opt.name < 1 {
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return errOpNoSupport
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}
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switch opt.typ {
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case ssoTypeInterface:
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return setsockoptInterface(fd, opt.name, ifi)
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case ssoTypeIPMreqn:
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return setsockoptIPMreqn(fd, opt.name, ifi, nil)
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default:
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return errOpNoSupport
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}
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}
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func getICMPFilter(fd int, opt *sockOpt) (*ICMPFilter, error) {
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if opt.name < 1 || opt.typ != ssoTypeICMPFilter {
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return nil, errOpNoSupport
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}
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var f ICMPFilter
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l := uint32(sysSizeofICMPFilter)
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if err := getsockopt(fd, iana.ProtocolReserved, opt.name, unsafe.Pointer(&f.sysICMPFilter), &l); err != nil {
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return nil, os.NewSyscallError("getsockopt", err)
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}
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return &f, nil
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}
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func setICMPFilter(fd int, opt *sockOpt, f *ICMPFilter) error {
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if opt.name < 1 || opt.typ != ssoTypeICMPFilter {
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return errOpNoSupport
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}
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return os.NewSyscallError("setsockopt", setsockopt(fd, iana.ProtocolReserved, opt.name, unsafe.Pointer(&f.sysICMPFilter), sysSizeofICMPFilter))
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}
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func setGroup(fd int, opt *sockOpt, ifi *net.Interface, grp net.IP) error {
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if opt.name < 1 {
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return errOpNoSupport
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}
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switch opt.typ {
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case ssoTypeIPMreq:
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return setsockoptIPMreq(fd, opt.name, ifi, grp)
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case ssoTypeIPMreqn:
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return setsockoptIPMreqn(fd, opt.name, ifi, grp)
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case ssoTypeGroupReq:
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return setsockoptGroupReq(fd, opt.name, ifi, grp)
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default:
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return errOpNoSupport
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}
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}
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func setSourceGroup(fd int, opt *sockOpt, ifi *net.Interface, grp, src net.IP) error {
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if opt.name < 1 || opt.typ != ssoTypeGroupSourceReq {
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return errOpNoSupport
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}
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return setsockoptGroupSourceReq(fd, opt.name, ifi, grp, src)
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}
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