/* -*- P4_16 -*- */
#include <core.p4>
#include <v1model.p4>
/*************************************************************************
*********************** H E A D E R S ***********************************
*************************************************************************/
//TODO 1: Define ethernet header, metadata and headers struct
struct ethernet_t {
bit<48> dstAddr;
bit<48> srcAddr;
bit<8> ethernetType;
}
struct metadata {
}
struct headers {
ethernet_t ethernet;
}
/*************************************************************************
*********************** P A R S E R ***********************************
*************************************************************************/
parser MyParser(packet_in packet,
out headers hdr,
inout metadata meta,
inout standard_metadata_t standard_metadata) {
state start {
//TODO 2: parse ethernet header
packet.extract(hdr.ethernet);
transition accept;
}
}
/*************************************************************************
************ C H E C K S U M V E R I F I C A T I O N *************
*************************************************************************/
control MyVerifyChecksum(inout headers hdr, inout metadata meta) {
apply { }
}
/*************************************************************************
************** I N G R E S S P R O C E S S I N G *******************
*************************************************************************/
control MyIngress(inout headers hdr,
inout metadata meta,
inout standard_metadata_t standard_metadata) {
action drop() {
mark_to_drop(standard_metadata);
}
//TODO 4: define an action to set the egress port
action set_egress_port(bit<9> port) {
standard_metadata.egress_spec = port;
}
//TODO 3: define a l2 forwarding table and define a match to set the egress port
table l2_forward {
key = {
hdr.ethernet.dstAddr;
}
actions = {
set_egress_port;
NoAction;
}
size = 512;
default_action = NoAction();
}
apply {
//TODO 5: call the forwarding table
l2_forward.apply();
}
}
/*************************************************************************
**************** E G R E S S P R O C E S S I N G *******************
*************************************************************************/
control MyEgress(inout headers hdr,
inout metadata meta,
inout standard_metadata_t standard_metadata) {
apply { }
}
/*************************************************************************
************* C H E C K S U M C O M P U T A T I O N **************
*************************************************************************/
control MyComputeChecksum(inout headers hdr, inout metadata meta) {
apply {
}
}
/*************************************************************************
*********************** D E P A R S E R *******************************
*************************************************************************/
control MyDeparser(packet_out packet, in headers hdr) {
apply {
//TODO 6: deparse ethernet header
packet.emit(hdr.ethernet);
}
}
/*************************************************************************
*********************** S W I T C H *******************************
*************************************************************************/
//switch architecture
V1Switch(
MyParser(),
MyVerifyChecksum(),
MyIngress(),
MyEgress(),
MyComputeChecksum(),
MyDeparser()
) main;
