public AHHeader(short hops, short ttl, Address source, Address dest, ushort options) {
//Make the header part:
byte[] header = new byte[ AHPacket.HeaderLength ];
int offset = 0;
//Write hops:
NumberSerializer.WriteShort(hops, header, offset);
offset += 2;
NumberSerializer.WriteShort(ttl, header, offset);
offset += 2;
offset += source.CopyTo(header, offset);
offset += dest.CopyTo(header, offset);
NumberSerializer.WriteShort((short)options, header, offset);
offset += 2;
_data = MemBlock.Reference(header, 0, offset);
}
public AHHeader(short hops, short ttl, Address source, Address dest, ushort options) {
//Make the header part:
byte[] header = new byte[ LENGTH ];
int offset = 0;
//Write hops:
NumberSerializer.WriteShort(hops, header, offset);
Hops = hops;
offset += 2;
NumberSerializer.WriteShort(ttl, header, offset);
Ttl = ttl;
offset += 2;
_src = source;
offset += source.CopyTo(header, offset);
_dest = dest;
offset += dest.CopyTo(header, offset);
Opts = options;
NumberSerializer.WriteShort((short)options, header, offset);
offset += 2;
_data = MemBlock.Reference(header, 0, offset);
}
/**
* @param hops Hops for this packet
* @param ttl TTL for this packet
* @param source Source Address for this packet
* @param destination Destination Address for this packet
* @param payload_prot AHPacket.Protocol of the Payload
* @param payload buffer holding the payload
* @param poff Offset to the zeroth byte of payload
* @param len Length of the payload
*/
public AHPacket(short hops,
short ttl,
Address source,
Address destination,
ushort options,
string payload_prot,
byte[] payload, int poff, int len)
{
_hops = hops;
_ttl = ttl;
_source = source;
_destination = destination;
if( options == AHOptions.AddClassDefault ) {
_options = GetDefaultOption( _destination );
}
else {
_options = options;
}
_pt = payload_prot;
_type_length = NumberSerializer.GetByteCount(_pt);
int total_size = 47 + _type_length + len;
byte[] buffer = new byte[ total_size ];
int off = 0;
buffer[off] = (byte)Packet.ProtType.AH;
off += 1;
NumberSerializer.WriteShort(_hops, buffer, off);
off += 2;
NumberSerializer.WriteShort(_ttl, buffer, off);
off += 2;
_source.CopyTo(buffer, off);
off += 20;
_destination.CopyTo(buffer, off);
off += 20;
NumberSerializer.WriteShort((short)_options, buffer, off);
off += 2;
off += NumberSerializer.WriteString(_pt, buffer, off);
Array.Copy(payload, poff, buffer, off, len);
_buffer = MemBlock.Reference(buffer, 0, total_size);
}