public unsafe void LeaveMulticastGroup(IPAddress groupAdress, uint interfaceIndex = 0)
{
var adress = groupAdress.GetAddressBytes();
if (groupAdress.AddressFamily == AddressFamily.InterNetwork)
{
ip_mreq value = new ip_mreq();
value.imr_interface.s_b4 = (byte)interfaceIndex;
fixed(byte *a = adress)
Unsafe.CopyBlock(value.imr_multiaddr.Address, a, (uint)adress.Length);
if (SetSocketOption(IPPROTO_IP_SocketOptions.IP_DROP_MEMBERSHIP, (void *)&value, Marshal.SizeOf <ip_mreq>()) != 0)
{
WinSock.ThrowLastWSAError();
}
}
else if (groupAdress.AddressFamily == AddressFamily.InterNetworkV6)
{
ipv6_mreq value = new ipv6_mreq();
value.ipv6mr_interface = interfaceIndex;
fixed(byte *a = adress)
Unsafe.CopyBlock(value.ipv6mr_multiaddr.Address, a, (uint)adress.Length);
if (SetSocketOption(IPPROTO_IPV6_SocketOptions.IPV6_DROP_MEMBERSHIP, (void *)&value, Marshal.SizeOf <ipv6_mreq>()) != 0)
{
WinSock.ThrowLastWSAError();
}
}
}
//public unsafe void JoinMulticastGroup(IPAddress groupAdress, uint interfaceIndex = 0)
//{
// group_req value = new group_req();
// value.gr_interface = interfaceIndex;
// var adress = groupAdress.GetAddressBytes();
// fixed (byte* a = adress)
// Unsafe.CopyBlock(value.gr_group.padding1, a, (uint)adress.Length);
// if (groupAdress.AddressFamily == AddressFamily.InterNetwork)
// value.gr_group.AdressFamily = ADDRESS_FAMILIES.AF_INET;
// else if (groupAdress.AddressFamily == AddressFamily.InterNetwork)
// value.gr_group.AdressFamily = ADDRESS_FAMILIES.AF_INET6;
// var res = SetSocketOption(MCAST_SocketOptions.MCAST_JOIN_GROUP, (void*)&value, Marshal.SizeOf<group_req>());
// WinSock.ThrowLastWSAError();
//}
public unsafe void JoinMulticastGroup(IPAddress groupAdress, uint interfaceIndex = 0)
{
var adress = groupAdress.GetAddressBytes();
if (groupAdress.AddressFamily == AddressFamily.InterNetwork)
{
ip_mreq value = new ip_mreq();
value.imr_interface.s_b4 = (byte)interfaceIndex;
fixed (byte* a = adress)
Unsafe.CopyBlock(value.imr_multiaddr.Address, a, (uint)adress.Length);
if (SetSocketOption(IPPROTO_IP_SocketOptions.IP_ADD_MEMBERSHIP, (void*)&value, Marshal.SizeOf<ip_mreq>()) != 0)
WinSock.ThrowLastWSAError();
}
else if (groupAdress.AddressFamily == AddressFamily.InterNetworkV6)
{
ipv6_mreq value = new ipv6_mreq();
value.ipv6mr_interface = interfaceIndex;
fixed (byte* a = adress)
Unsafe.CopyBlock(value.ipv6mr_multiaddr.Address, a, (uint)adress.Length);
if (SetSocketOption(IPPROTO_IPV6_SocketOptions.IPV6_ADD_MEMBERSHIP, (void*)&value, Marshal.SizeOf<ipv6_mreq>()) != 0)
WinSock.ThrowLastWSAError();
}
}