/// <summary>
/// Gets whether or not given ipv4 header has the more fragments flag set.
/// </summary>
/// <param name="hdr">
/// The ipv4 header.
/// </param>
/// <returns>
/// True if the given ipv4 has the more fragments flag set, false otherwise.
/// </returns>
public static bool WINDIVERT_IPHDR_GET_MF(WINDIVERT_IPHDR hdr)
{
return((ushort)(hdr.FragOff0 & 0x0020) != 0);
}
/// <summary>
/// Gets the fragment offset for the given ipv4 header.
/// </summary>
/// <param name="hdr">
/// The ipv4 header.
/// </param>
/// <returns>
/// The extracted fragment offset from the given ipv4 header.
/// </returns>
public static ushort WINDIVERT_IPHDR_GET_FRAGOFF(WINDIVERT_IPHDR hdr)
{
return((ushort)(hdr.FragOff0 & 0xFF1F));
}
/// <summary>
/// Sets the reserved flag to the given value.
/// </summary>
/// <param name="header">
/// The ipv4 header.
/// </param>
/// <param name="val">
/// The reserved flag value.
/// </param>
public static void WINDIVERT_IPHDR_SET_RESERVED(WINDIVERT_IPHDR header, ushort val)
{
header.FragOff0 = (ushort)((header.FragOff0 & 0xFF7F) | ((val & 0x0001) << 7));
}
/// <summary>
/// Sets the don't fragment flag to the given value.
/// </summary>
/// <param name="header">
/// The ipv4 header.
/// </param>
/// <param name="val">
/// The don't fragment flag value.
/// </param>
public static void WINDIVERT_IPHDR_SET_DF(WINDIVERT_IPHDR header, ushort val)
{
header.FragOff0 = (ushort)((header.FragOff0 & 0xFFBF) | ((val & 0x0001) << 6));
}
/// <summary>
/// Sets the fragment offset for the given ipv4 header.
/// </summary>
/// <param name="header">
/// The ipv4 header.
/// </param>
/// <param name="val">
/// The fragment offset.
/// </param>
public static void WINDIVERT_IPHDR_SET_FRAGOFF(WINDIVERT_IPHDR header, ushort val)
{
header.FragOff0 = (ushort)((header.FragOff0 & 0x00E0) | (val & 0xFF1F));
}
/// <summary>
/// Gets whether or not given ipv4 header has the reserved flag set.
/// </summary>
/// <param name="hdr">
/// The ipv4 header.
/// </param>
/// <returns>
/// True if the given ipv4 has the reserved flag set, false otherwise.
/// </returns>
public static bool WINDIVERT_IPHDR_GET_RESERVED(WINDIVERT_IPHDR hdr)
{
return((ushort)(hdr.FragOff0 & 0x0080) != 0);
}