93 lines
2 KiB
Text
93 lines
2 KiB
Text
/* -*- P4_16 -*- */
|
|
#ifndef PARSERS_P4
|
|
#define PARSERS_P4
|
|
|
|
#include <core.p4>
|
|
#include <v1model.p4>
|
|
|
|
#include "headers.p4"
|
|
|
|
parser MyParser(packet_in packet,
|
|
out headers hdr,
|
|
inout metadata meta,
|
|
inout standard_metadata_t standard_metadata) {
|
|
|
|
state start {
|
|
packet.extract(hdr.ethernet);
|
|
transition select(hdr.ethernet.ethertype){
|
|
TYPE_IPV4: ipv4;
|
|
TYPE_IPV6: ipv6;
|
|
default: accept;
|
|
}
|
|
}
|
|
|
|
state ipv4 {
|
|
packet.extract(hdr.ipv4);
|
|
meta.tcp_length = hdr.ipv4.totalLen - 16w20;
|
|
|
|
transition select(hdr.ipv4.protocol){
|
|
PROTO_TCP: tcp;
|
|
PROTO_UDP: udp;
|
|
PROTO_ICMP: icmp;
|
|
|
|
default: accept;
|
|
}
|
|
}
|
|
|
|
state ipv6 {
|
|
packet.extract(hdr.ipv6);
|
|
meta.tcp_length = hdr.ipv6.payload_length;
|
|
|
|
transition select(hdr.ipv6.next_header){
|
|
PROTO_TCP: tcp;
|
|
PROTO_UDP: udp;
|
|
PROTO_ICMP6: icmp6;
|
|
default: accept;
|
|
}
|
|
}
|
|
|
|
/* Leaf */
|
|
state tcp {
|
|
packet.extract(hdr.tcp);
|
|
transition accept;
|
|
}
|
|
|
|
state udp {
|
|
packet.extract(hdr.udp);
|
|
transition accept;
|
|
}
|
|
|
|
state icmp6 {
|
|
packet.extract(hdr.icmp6);
|
|
transition accept;
|
|
}
|
|
|
|
state icmp {
|
|
packet.extract(hdr.icmp);
|
|
transition accept;
|
|
}
|
|
|
|
}
|
|
|
|
/*************************************************************************
|
|
************************ D E P A R S E R *******************************
|
|
*************************************************************************/
|
|
|
|
control MyDeparser(packet_out packet, in headers hdr) {
|
|
apply {
|
|
packet.emit(hdr.ethernet);
|
|
|
|
/* either */
|
|
packet.emit(hdr.ipv4);
|
|
packet.emit(hdr.ipv6);
|
|
|
|
/* either */
|
|
packet.emit(hdr.tcp);
|
|
packet.emit(hdr.udp);
|
|
packet.emit(hdr.icmp);
|
|
packet.emit(hdr.icmp6);
|
|
}
|
|
}
|
|
|
|
|
|
#endif
|