191 lines
5.2 KiB
Text
191 lines
5.2 KiB
Text
/* -*- 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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update_checksum_with_payload(meta.chk_icmp6 == 1,
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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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meta.cast_length, /* 32 */
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24w0, /* 24 0's */
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PROTO_ICMP6, /* 8 */
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hdr.icmp6.type, /* 8 */
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hdr.icmp6.code /* 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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/* checksumming for icmp6_na_ns_option */
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update_checksum_with_payload(meta.chk_icmp6_na_ns == 1,
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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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meta.cast_length, /* 32 */
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24w0, /* 24 0's */
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PROTO_ICMP6, /* 8 */
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hdr.icmp6.type, /* 8 */
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hdr.icmp6.code, /* 8 */
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hdr.icmp6_na_ns.router,
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hdr.icmp6_na_ns.solicitated,
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hdr.icmp6_na_ns.override,
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hdr.icmp6_na_ns.reserved,
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hdr.icmp6_na_ns.target_addr,
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hdr.icmp6_option_link_layer_addr.type,
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hdr.icmp6_option_link_layer_addr.ll_length,
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hdr.icmp6_option_link_layer_addr.mac_addr
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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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update_checksum_with_payload(meta.chk_icmp == 1,
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{
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hdr.icmp.type,
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hdr.icmp.code
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},
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hdr.icmp.checksum,
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HashAlgorithm.csum16
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);
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update_checksum(meta.chk_ipv4 == 1,
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{
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hdr.ipv4.version,
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hdr.ipv4.ihl,
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hdr.ipv4.diff_serv,
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hdr.ipv4.ecn,
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hdr.ipv4.totalLen,
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hdr.ipv4.identification,
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hdr.ipv4.flags,
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hdr.ipv4.fragOffset,
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hdr.ipv4.ttl,
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hdr.ipv4.protocol,
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hdr.ipv4.src_addr,
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hdr.ipv4.dst_addr
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},
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hdr.ipv4.hdrChecksum,
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HashAlgorithm.csum16);
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update_checksum_with_payload(meta.chk_udp_v4 == 1,
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{
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hdr.ipv4.src_addr,
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hdr.ipv4.dst_addr,
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8w0,
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hdr.ipv4.protocol,
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meta.length_without_ip_header,
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// UDP header
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hdr.udp.src_port,
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hdr.udp.dst_port,
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hdr.udp.payload_length,
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},
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hdr.udp.checksum,
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HashAlgorithm.csum16
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);
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update_checksum_with_payload(meta.chk_udp_v6 == 1,
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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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meta.length_without_ip_header, /* 32 */
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24w0, /* 24 */
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hdr.ipv6.next_header, /* 8 */
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/* total: 324 */
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// UDP header
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hdr.udp.src_port, /* 16 */
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hdr.udp.dst_port, /* 16 */
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hdr.udp.payload_length, /* 16 */
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/* all: 372 */
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},
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hdr.udp.checksum,
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HashAlgorithm.csum16
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);
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update_checksum_with_payload(meta.chk_tcp_v4 == 1,
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{
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hdr.ipv4.src_addr,
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hdr.ipv4.dst_addr,
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8w0,
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hdr.ipv4.protocol,
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meta.length_without_ip_header,
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// TCP header
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hdr.tcp.src_port,
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hdr.tcp.dst_port,
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hdr.tcp.seqNo,
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hdr.tcp.ackNo,
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hdr.tcp.data_offset,
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hdr.tcp.res,
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hdr.tcp.cwr,
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hdr.tcp.ece,
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hdr.tcp.urg,
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hdr.tcp.ack,
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hdr.tcp.psh,
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hdr.tcp.rst,
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hdr.tcp.syn,
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hdr.tcp.fin,
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hdr.tcp.window,
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hdr.tcp.urgentPtr
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},
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hdr.tcp.checksum,
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HashAlgorithm.csum16
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);
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update_checksum_with_payload(meta.chk_tcp_v6 == 1,
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{
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hdr.ipv6.src_addr,
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hdr.ipv6.dst_addr,
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meta.length_without_ip_header,
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24w0,
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hdr.ipv6.next_header,
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// TCP header
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hdr.tcp.src_port,
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hdr.tcp.dst_port,
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hdr.tcp.seqNo,
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hdr.tcp.ackNo,
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hdr.tcp.data_offset,
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hdr.tcp.res,
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hdr.tcp.cwr,
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hdr.tcp.ece,
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hdr.tcp.urg,
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hdr.tcp.ack,
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hdr.tcp.psh,
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hdr.tcp.rst,
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hdr.tcp.syn,
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hdr.tcp.fin,
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hdr.tcp.window,
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hdr.tcp.urgentPtr
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},
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hdr.tcp.checksum,
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HashAlgorithm.csum16);
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}
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}
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#endif
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