Golang GetsockoptIPMreqn示例

示例#1

文件： sockopt_linux.go 项目： Bobberino/musings

func ipv4MulticastInterface(fd int) (*net.Interface, error) {
	mreqn, err := syscall.GetsockoptIPMreqn(fd, syscall.IPPROTO_IP, syscall.IP_MULTICAST_IF)
	if err != nil {
		return nil, os.NewSyscallError("getsockopt", err)
	}
	if int(mreqn.Ifindex) == 0 {
		return nil, nil
	}
	return net.InterfaceByIndex(int(mreqn.Ifindex))
}

示例#2

文件： sockopt_linux.go 项目： Christopheraburns/clive

func ipv4MulticastInterface(fd int) (*net.Interface, error) {
	mreqn, err := syscall.GetsockoptIPMreqn(fd, ianaProtocolIP, sysSockoptMulticastInterface)
	if err != nil {
		return nil, os.NewSyscallError("getsockopt", err)
	}
	if mreqn.Ifindex == 0 {
		return nil, nil
	}
	return net.InterfaceByIndex(int(mreqn.Ifindex))
}

示例#3

func ipv4MulticastInterface(fd *netFD) (*Interface, error) {
	fd.incref()
	defer fd.decref()
	mreq, err := syscall.GetsockoptIPMreqn(fd.sysfd, syscall.IPPROTO_IP, syscall.IP_MULTICAST_IF)
	if err != nil {
		return nil, os.NewSyscallError("getsockopt", err)
	}
	if int(mreq.Ifindex) == 0 {
		return nil, nil
	}
	return InterfaceByIndex(int(mreq.Ifindex))
}