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/* -*- 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_with_payload(meta.chk_icmp6 == 1,
{
hdr.ipv6.src_addr, /* 128 */
hdr.ipv6.dst_addr, /* 128 */
meta.cast_length, /* 32 */
24w0, /* 24 0's */
PROTO_ICMP6, /* 8 */
hdr.icmp6.type, /* 8 */
hdr.icmp6.code /* 8 */
},
hdr.icmp6.checksum,
HashAlgorithm.csum16
);
/* checksumming for icmp6_na_ns_option */
update_checksum_with_payload(meta.chk_icmp6_na_ns == 1,
{
hdr.ipv6.src_addr, /* 128 */
hdr.ipv6.dst_addr, /* 128 */
meta.cast_length, /* 32 */
24w0, /* 24 0's */
PROTO_ICMP6, /* 8 */
hdr.icmp6.type, /* 8 */
hdr.icmp6.code, /* 8 */
hdr.icmp6_na_ns.router,
hdr.icmp6_na_ns.solicitated,
hdr.icmp6_na_ns.override,
hdr.icmp6_na_ns.reserved,
hdr.icmp6_na_ns.target_addr,
hdr.icmp6_option_link_layer_addr.type,
hdr.icmp6_option_link_layer_addr.ll_length,
hdr.icmp6_option_link_layer_addr.mac_addr
},
hdr.icmp6.checksum,
HashAlgorithm.csum16
);
update_checksum_with_payload(meta.chk_icmp == 1,
{
hdr.icmp.type,
hdr.icmp.code
},
hdr.icmp.checksum,
HashAlgorithm.csum16
);
}
}
#endif