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97 lines
2.1 KiB
97 lines
2.1 KiB
/* -*- P4_16 -*- */ |
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#ifndef PARSERS_P4 |
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#define PARSERS_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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parser MyParser(packet_in packet, |
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out headers hdr, |
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inout metadata meta, |
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inout standard_metadata_t standard_metadata) { |
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state start { |
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packet.extract(hdr.ethernet); |
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transition select(hdr.ethernet.ethertype){ |
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TYPE_IPV4: ipv4; |
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TYPE_IPV6: ipv6; |
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default: accept; |
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} |
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} |
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state ipv4 { |
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packet.extract(hdr.ipv4); |
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meta.tcp_length = hdr.ipv4.totalLen - 16w20; |
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transition select(hdr.ipv4.protocol){ |
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PROTO_TCP: tcp; |
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PROTO_UDP: udp; |
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PROTO_ICMP: icmp; |
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default: accept; |
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} |
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} |
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state ipv6 { |
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packet.extract(hdr.ipv6); |
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meta.tcp_length = hdr.ipv6.payload_length; |
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transition select(hdr.ipv6.next_header){ |
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PROTO_TCP: tcp; |
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PROTO_UDP: udp; |
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PROTO_ICMP6: icmp6; |
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default: accept; |
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} |
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} |
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/* Leaf */ |
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state tcp { |
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packet.extract(hdr.tcp); |
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transition accept; |
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} |
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state udp { |
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packet.extract(hdr.udp); |
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transition accept; |
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} |
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state icmp6 { |
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packet.extract(hdr.icmp6); |
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transition accept; |
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} |
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state icmp { |
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packet.extract(hdr.icmp); |
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transition accept; |
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} |
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} |
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/************************************************************************* |
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************************ D E P A R S E R ******************************* |
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*************************************************************************/ |
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control MyDeparser(packet_out packet, in headers hdr) { |
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apply { |
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/* always */ |
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packet.emit(hdr.ethernet); |
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/* only if information is sent to the controller */ |
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packet.emit(hdr.cpu); |
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/* either */ |
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packet.emit(hdr.ipv4); |
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packet.emit(hdr.ipv6); |
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/* either */ |
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packet.emit(hdr.tcp); |
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packet.emit(hdr.udp); |
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packet.emit(hdr.icmp); |
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packet.emit(hdr.icmp6); |
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} |
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} |
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#endif
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