43 lines
1.2 KiB
Plaintext
43 lines
1.2 KiB
Plaintext
/* -*- P4_16 -*- */
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#ifndef CHECKSUMS_P4
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#define CHECKSUMS_P4
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#include <core.p4>
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#include <v1model.p4>
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#include "headers.p4"
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/*************************************************************************
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************* C H E C K S U M V E R I F I C A T I O N *************
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*************************************************************************/
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control MyVerifyChecksum(inout headers hdr, inout metadata meta) {
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apply {}
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}
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/*************************************************************************
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************** C H E C K S U M C O M P U T A T I O N **************
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*************************************************************************/
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control MyComputeChecksum(inout headers hdr, inout metadata meta) {
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apply {
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bit<32> cksum = (bit<32>) hdr.ipv6.payload_length;
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update_checksum (
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hdr.icmp6.isValid(),
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{
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hdr.ipv6.src_addr, /* 128 */
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hdr.ipv6.dst_addr, /* 128 */
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cksum, /* 32 */
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24w0, /* 24 0's */
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PROTO_ICMP6 /* 8 */
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},
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hdr.icmp6.checksum,
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HashAlgorithm.csum16
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);
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}
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}
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#endif
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