/* -*- 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 {

        if(meta.calc_icmp6_checksum) {
            hdr.icmp6.checksum = 42; /* must be correct */
        }

        // verify_checksum_with_payload<T, O>(in bool condition, in T data, inout O checksum, HashAlgorithm algo);
        // GRRRRR bit<32> icmp6_len = 32; /* for icmp6 NS */

		// GRRRRR update_checksum (
		// GRRRRR 	hdr.icmp6.isValid(),
		// GRRRRR 	{
        // GRRRRR         hdr.ipv6.src_addr,         /* 128 */
		// GRRRRR 		hdr.ipv6.dst_addr,         /* 128 */
        // GRRRRR         icmp6_len,                 /* 32 */
        // GRRRRR         24w0,                      /* 24 0's */
        // GRRRRR         PROTO_ICMP6                /* 8 */
        // GRRRRR     },
        // GRRRRR     hdr.icmp6.checksum,
        // GRRRRR     HashAlgorithm.csum16
        // GRRRRR );
    }
}


#endif