/* -*- P4_16 -*- */
#ifndef CHECKSUMS_P4
#define CHECKSUMS_P4

#include <core.p4>
#include <v1model.p4>

#include "headers.p4"

/*************************************************************************
*************   C H E C K S U M    V E R I F I C A T I O N   *************
*************************************************************************/

control MyVerifyChecksum(inout headers hdr, inout metadata meta) {
    apply {}
}

/*************************************************************************
**************   C H E C K S U M    C O M P U T A T I O N   **************
*************************************************************************/

control MyComputeChecksum(inout headers  hdr, inout metadata meta) {
    apply {
		update_checksum (
			hdr.icmp6.isValid(),
			{
                hdr.ipv6.src_addr,         /* 128 */
				hdr.ipv6.dst_addr,         /* 128 */
                hdr.ipv6.payload_length,   /* 16  -> should be 32 according to RFC2460 - also static number? */
                24w0,                      /* 24 0's */
                PROTO_ICMP6                /* 8 */
            }
            hdr.icmp6.checksum,
            HashAlgorithm.csum16);
    }
}


#endif