e7e6899d5c
* Added advanced Heavy Hitter Detection example * Changed directory location * Restored skeleton version * Added files for common run infra with the other tutorials * Updated readme * Autogenerate setup rules * Commends in simple_router.p4 * Fix typos * Removed commended out lines
52 lines
1.4 KiB
Plaintext
52 lines
1.4 KiB
Plaintext
parser ParserImpl(packet_in packet, out headers hdr, inout metadata meta, inout standard_metadata_t standard_metadata) {
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state start {
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transition parse_ethernet;
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}
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state parse_ethernet {
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packet.extract(hdr.ethernet);
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transition select(hdr.ethernet.etherType) {
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16w0x800: parse_ipv4;
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default: accept;
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}
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}
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state parse_ipv4 {
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packet.extract(hdr.ipv4);
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transition select(hdr.ipv4.protocol) {
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8w0x6: parse_tcp;
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default: accept;
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}
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}
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state parse_tcp {
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packet.extract(hdr.tcp);
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transition accept;
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}
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}
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control DeparserImpl(packet_out packet, in headers hdr) {
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apply {
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packet.emit(hdr.ethernet);
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packet.emit(hdr.ipv4);
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packet.emit(hdr.tcp);
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}
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}
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control verifyChecksum(inout headers hdr, inout metadata meta) {
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apply { }
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}
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control computeChecksum(inout headers hdr, inout metadata meta) {
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apply {
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update_checksum(
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hdr.ipv4.isValid(),
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{ hdr.ipv4.version, hdr.ipv4.ihl, hdr.ipv4.diffserv,
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hdr.ipv4.totalLen, hdr.ipv4.identification,
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hdr.ipv4.flags, hdr.ipv4.fragOffset, hdr.ipv4.ttl,
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hdr.ipv4.protocol, hdr.ipv4.srcAddr, hdr.ipv4.dstAddr },
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hdr.ipv4.hdrChecksum,
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HashAlgorithm.csum16);
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}
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}
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