dccph=(struct dccp_hdr*)old->data;
dccphex=(struct dccp_hdr_ext*)(old->data+sizeof(struct dccp_hdr));
dccphack=(struct dccp_hdr_ack_bits*)(old->data+ sizeof(struct dccp_hdr) + sizeof(struct dccp_hdr_ext));
dccph=(struct dccp_hdr*)old->data;
dccphex=(struct dccp_hdr_ext*)(old->data+sizeof(struct dccp_hdr));
dccphack=(struct dccp_hdr_ack_bits*)(old->data+ sizeof(struct dccp_hdr) + sizeof(struct dccp_hdr_ext));