ecef45df84
hack/pin-dependency.sh golang.org/x/crypto latest hack/pin-dependency.sh golang.org/x/net latest hack/pin-dependency.sh golang.org/x/exp latest hack/pin-dependency.sh golang.org/x/sys latest hack/pin-dependency.sh golang.org/x/time latest hack/pin-dependency.sh golang.org/x/tools latest hack/lint-dependencies.sh hack/pin-dependency.sh dmitri.shuralyov.com/gpu/mtl v0.0.0-20201218220906-28db891af037 hack/pin-dependency.sh golang.org/x/mobile v0.0.0-20201217150744-e6ae53a27f4f hack/pin-dependency.sh golang.org/x/mod v0.3.1-0.20200828183125-ce943fd02449 hack/lint-dependencies.sh hack/update-internal-modules.sh hack/update-vendor.sh Co-authored-by: Stephen Augustus <foo@auggie.dev>
44 lines
1005 B
Go
44 lines
1005 B
Go
// Copyright 2014 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.
|
|
|
|
//go:build darwin || freebsd || linux
|
|
// +build darwin freebsd linux
|
|
|
|
package ipv4
|
|
|
|
import (
|
|
"net"
|
|
"unsafe"
|
|
|
|
"golang.org/x/net/internal/socket"
|
|
)
|
|
|
|
func (so *sockOpt) getIPMreqn(c *socket.Conn) (*net.Interface, error) {
|
|
b := make([]byte, so.Len)
|
|
if _, err := so.Get(c, b); err != nil {
|
|
return nil, err
|
|
}
|
|
mreqn := (*ipMreqn)(unsafe.Pointer(&b[0]))
|
|
if mreqn.Ifindex == 0 {
|
|
return nil, nil
|
|
}
|
|
ifi, err := net.InterfaceByIndex(int(mreqn.Ifindex))
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
return ifi, nil
|
|
}
|
|
|
|
func (so *sockOpt) setIPMreqn(c *socket.Conn, ifi *net.Interface, grp net.IP) error {
|
|
var mreqn ipMreqn
|
|
if ifi != nil {
|
|
mreqn.Ifindex = int32(ifi.Index)
|
|
}
|
|
if grp != nil {
|
|
mreqn.Multiaddr = [4]byte{grp[0], grp[1], grp[2], grp[3]}
|
|
}
|
|
b := (*[sizeofIPMreqn]byte)(unsafe.Pointer(&mreqn))[:sizeofIPMreqn]
|
|
return so.Set(c, b)
|
|
}
|