wire.p4

/* -*- P4_16 -*- */
#include <core.p4>
#include <v1model.p4>

struct metadata { }

struct headers { }

parser MyParser(packet_in packet,
                out headers hdr,
                inout metadata meta,
                inout standard_metadata_t standard_metadata) {
    state start { transition accept; }
}

control MyVerifyChecksum(inout headers hdr, inout metadata meta) {   
    apply { }
}

control MyIngress(inout headers hdr,
                  inout metadata meta,
                  inout standard_metadata_t standard_metadata) {
    apply {
        if (standard_metadata.ingress_port == 1)
            standard_metadata.egress_spec = 2;
        else
            standard_metadata.egress_spec = 1;
    }
}

control MyEgress(inout headers hdr,
                 inout metadata meta,
                 inout standard_metadata_t standard_metadata) {
    apply { }
}

control MyComputeChecksum(inout headers  hdr, inout metadata meta) {
     apply { }
}

control MyDeparser(packet_out packet, in headers hdr) {
    apply { }
}

V1Switch(
MyParser(),
MyVerifyChecksum(),
MyIngress(),
MyEgress(),
MyComputeChecksum(),
MyDeparser()
) main;