| // 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. |
| |
| package ipv4 |
| |
| import ( |
| "net" |
| "os" |
| "syscall" |
| "unsafe" |
| |
| "golang.org/x/net/internal/iana" |
| ) |
| |
| func getInt(fd syscall.Handle, opt *sockOpt) (int, error) { |
| if opt.name < 1 || opt.typ != ssoTypeInt { |
| return 0, errOpNoSupport |
| } |
| var i int32 |
| l := int32(4) |
| if err := syscall.Getsockopt(fd, iana.ProtocolIP, int32(opt.name), (*byte)(unsafe.Pointer(&i)), &l); err != nil { |
| return 0, os.NewSyscallError("getsockopt", err) |
| } |
| return int(i), nil |
| } |
| |
| func setInt(fd syscall.Handle, opt *sockOpt, v int) error { |
| if opt.name < 1 || opt.typ != ssoTypeInt { |
| return errOpNoSupport |
| } |
| i := int32(v) |
| return os.NewSyscallError("setsockopt", syscall.Setsockopt(fd, iana.ProtocolIP, int32(opt.name), (*byte)(unsafe.Pointer(&i)), 4)) |
| } |
| |
| func getInterface(fd syscall.Handle, opt *sockOpt) (*net.Interface, error) { |
| if opt.name < 1 || opt.typ != ssoTypeInterface { |
| return nil, errOpNoSupport |
| } |
| return getsockoptInterface(fd, opt.name) |
| } |
| |
| func setInterface(fd syscall.Handle, opt *sockOpt, ifi *net.Interface) error { |
| if opt.name < 1 || opt.typ != ssoTypeInterface { |
| return errOpNoSupport |
| } |
| return setsockoptInterface(fd, opt.name, ifi) |
| } |
| |
| func setGroup(fd syscall.Handle, opt *sockOpt, ifi *net.Interface, grp net.IP) error { |
| if opt.name < 1 || opt.typ != ssoTypeIPMreq { |
| return errOpNoSupport |
| } |
| return setsockoptIPMreq(fd, opt.name, ifi, grp) |
| } |
| |
| func setSourceGroup(fd syscall.Handle, opt *sockOpt, ifi *net.Interface, grp, src net.IP) error { |
| // TODO(mikio): implement this |
| return errOpNoSupport |
| } |