/// <summary>Gets the active udp listeners. Uses the native GetUdpTable api.</summary>
public override IPEndPoint[] GetActiveUdpListeners()
{
uint size = 0;
uint result = 0;
SafeLocalFree buffer = null;
List <IPEndPoint> udpListeners = new List <IPEndPoint>();
// Check if it support IPv4 for IPv6 only modes.
if (Socket.OSSupportsIPv4)
{
// Get the size of buffer needed
result = UnsafeNetInfoNativeMethods.GetUdpTable(SafeLocalFree.Zero, ref size, true);
while (result == IpHelperErrors.ErrorInsufficientBuffer)
{
try {
//allocate the buffer and get the udptable
buffer = SafeLocalFree.LocalAlloc((int)size);
result = UnsafeNetInfoNativeMethods.GetUdpTable(buffer, ref size, true);
if (result == IpHelperErrors.Success)
{
//the table info just gives us the number of rows.
IntPtr newPtr = buffer.DangerousGetHandle();
MibUdpTable udpTableInfo = (MibUdpTable)Marshal.PtrToStructure(newPtr, typeof(MibUdpTable));
if (udpTableInfo.numberOfEntries > 0)
{
//we need to skip over the tableinfo to get the inline rows
newPtr = (IntPtr)((long)newPtr + Marshal.SizeOf(udpTableInfo.numberOfEntries));
for (int i = 0; i < udpTableInfo.numberOfEntries; i++)
{
MibUdpRow udpRow = (MibUdpRow)Marshal.PtrToStructure(newPtr, typeof(MibUdpRow));
int localPort = udpRow.localPort1 << 8 | udpRow.localPort2;
udpListeners.Add(new IPEndPoint(udpRow.localAddr, (int)localPort));
//we increment the pointer to the next row
newPtr = (IntPtr)((long)newPtr + Marshal.SizeOf(udpRow));
}
}
}
}
finally {
if (buffer != null)
{
buffer.Close();
}
}
}
// if we don't have any ipv4 interfaces detected, just continue
if (result != IpHelperErrors.Success && result != IpHelperErrors.ErrorNoData)
{
throw new NetworkInformationException((int)result);
}
}
if (Socket.OSSupportsIPv6)
{
// Get the size of buffer needed
size = 0;
result = UnsafeNetInfoNativeMethods.GetExtendedUdpTable(SafeLocalFree.Zero, ref size, true,
(uint)AddressFamily.InterNetworkV6,
UdpTableClass.UdpTableOwnerPid, 0);
while (result == IpHelperErrors.ErrorInsufficientBuffer)
{
try {
// Allocate the buffer and get the udptable
buffer = SafeLocalFree.LocalAlloc((int)size);
result = UnsafeNetInfoNativeMethods.GetExtendedUdpTable(buffer, ref size, true,
(uint)AddressFamily.InterNetworkV6,
UdpTableClass.UdpTableOwnerPid, 0);
if (result == IpHelperErrors.Success)
{
// The table info just gives us the number of rows.
IntPtr newPtr = buffer.DangerousGetHandle();
MibUdp6TableOwnerPid udp6TableOwnerPid
= (MibUdp6TableOwnerPid)Marshal.PtrToStructure(newPtr, typeof(MibUdp6TableOwnerPid));
if (udp6TableOwnerPid.numberOfEntries > 0)
{
// We need to skip over the tableinfo to get the inline rows
newPtr = (IntPtr)((long)newPtr + Marshal.SizeOf(udp6TableOwnerPid.numberOfEntries));
for (int i = 0; i < udp6TableOwnerPid.numberOfEntries; i++)
{
MibUdp6RowOwnerPid udp6RowOwnerPid
= (MibUdp6RowOwnerPid)Marshal.PtrToStructure(newPtr,
typeof(MibUdp6RowOwnerPid));
int localPort = udp6RowOwnerPid.localPort1 << 8 | udp6RowOwnerPid.localPort2;
udpListeners.Add(new IPEndPoint(new IPAddress(udp6RowOwnerPid.localAddr,
udp6RowOwnerPid.localScopeId), localPort));
// We increment the pointer to the next row
newPtr = (IntPtr)((long)newPtr + Marshal.SizeOf(udp6RowOwnerPid));
}
}
}
}
finally {
if (buffer != null)
{
buffer.Close();
}
}
}
// If we don't have any ipv6 interfaces detected, just continue
if (result != IpHelperErrors.Success && result != IpHelperErrors.ErrorNoData)
{
throw new NetworkInformationException((int)result);
}
}
return(udpListeners.ToArray());
}
public override IPEndPoint[] GetActiveUdpListeners()
{
uint dwOutBufLen = 0;
uint num2 = 0;
SafeLocalFree pUdpTable = null;
List <IPEndPoint> list = new List <IPEndPoint>();
if (Socket.OSSupportsIPv4)
{
num2 = UnsafeNetInfoNativeMethods.GetUdpTable(SafeLocalFree.Zero, ref dwOutBufLen, true);
while (num2 == 0x7a)
{
try
{
pUdpTable = SafeLocalFree.LocalAlloc((int)dwOutBufLen);
num2 = UnsafeNetInfoNativeMethods.GetUdpTable(pUdpTable, ref dwOutBufLen, true);
if (num2 == 0)
{
IntPtr handle = pUdpTable.DangerousGetHandle();
MibUdpTable table = (MibUdpTable)Marshal.PtrToStructure(handle, typeof(MibUdpTable));
if (table.numberOfEntries > 0)
{
handle = (IntPtr)(((long)handle) + Marshal.SizeOf(table.numberOfEntries));
for (int i = 0; i < table.numberOfEntries; i++)
{
MibUdpRow structure = (MibUdpRow)Marshal.PtrToStructure(handle, typeof(MibUdpRow));
int port = (structure.localPort1 << 8) | structure.localPort2;
list.Add(new IPEndPoint((long)structure.localAddr, port));
handle = (IntPtr)(((long)handle) + Marshal.SizeOf(structure));
}
}
}
continue;
}
finally
{
if (pUdpTable != null)
{
pUdpTable.Close();
}
}
}
if ((num2 != 0) && (num2 != 0xe8))
{
throw new NetworkInformationException((int)num2);
}
}
if (Socket.OSSupportsIPv6)
{
dwOutBufLen = 0;
num2 = UnsafeNetInfoNativeMethods.GetExtendedUdpTable(SafeLocalFree.Zero, ref dwOutBufLen, true, 0x17, UdpTableClass.UdpTableOwnerPid, 0);
while (num2 == 0x7a)
{
try
{
pUdpTable = SafeLocalFree.LocalAlloc((int)dwOutBufLen);
num2 = UnsafeNetInfoNativeMethods.GetExtendedUdpTable(pUdpTable, ref dwOutBufLen, true, 0x17, UdpTableClass.UdpTableOwnerPid, 0);
if (num2 == 0)
{
IntPtr ptr = pUdpTable.DangerousGetHandle();
MibUdp6TableOwnerPid pid = (MibUdp6TableOwnerPid)Marshal.PtrToStructure(ptr, typeof(MibUdp6TableOwnerPid));
if (pid.numberOfEntries > 0)
{
ptr = (IntPtr)(((long)ptr) + Marshal.SizeOf(pid.numberOfEntries));
for (int j = 0; j < pid.numberOfEntries; j++)
{
MibUdp6RowOwnerPid pid2 = (MibUdp6RowOwnerPid)Marshal.PtrToStructure(ptr, typeof(MibUdp6RowOwnerPid));
int num6 = (pid2.localPort1 << 8) | pid2.localPort2;
list.Add(new IPEndPoint(new IPAddress(pid2.localAddr, (long)pid2.localScopeId), num6));
ptr = (IntPtr)(((long)ptr) + Marshal.SizeOf(pid2));
}
}
}
continue;
}
finally
{
if (pUdpTable != null)
{
pUdpTable.Close();
}
}
}
if ((num2 != 0) && (num2 != 0xe8))
{
throw new NetworkInformationException((int)num2);
}
}
return(list.ToArray());
}
