128 lines
4.0 KiB
Plaintext
128 lines
4.0 KiB
Plaintext
/* -*- P4_16 -*- */
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/*
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* P4 Calculator
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*
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* This program implements a simple protocol. It can be carried over Ethernet
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* (Ethertype 0x1234).
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*
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* The Protocol header looks like this:
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*
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* 0 1 2 3
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* +----------------+----------------+----------------+---------------+
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* | P | 4 | Version | Op |
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* +----------------+----------------+----------------+---------------+
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* | Operand A |
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* +----------------+----------------+----------------+---------------+
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* | Operand B |
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* +----------------+----------------+----------------+---------------+
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* | Result |
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* +----------------+----------------+----------------+---------------+
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*
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* P is an ASCII Letter 'P' (0x50)
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* 4 is an ASCII Letter '4' (0x34)
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* Version is currently 0.1 (0x01)
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* Op is an operation to Perform:
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* '+' (0x2b) Result = OperandA + OperandB
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* '-' (0x2d) Result = OperandA - OperandB
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* '&' (0x26) Result = OperandA & OperandB
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* '|' (0x7c) Result = OperandA | OperandB
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* '^' (0x5e) Result = OperandA ^ OperandB
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*
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* The device receives a packet, performs the requested operation, fills in the
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* result and sends the packet back out of the same port it came in on, while
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* swapping the source and destination addresses.
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*
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* If an unknown operation is specified or the header is not valid, the packet
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* is dropped
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*/
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#include <core.p4>
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#include <v1model.p4>
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/*
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* Define the headers the program will recognize
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*/
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struct my_headers_t {
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/* TODO: fill this in */
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}
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struct my_metadata_t {
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/* In our case it is empty */
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}
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/*************************************************************************
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*********************** P A R S E R ***********************************
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*************************************************************************/
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parser MyParser(
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packet_in packet,
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out my_headers_t hdr,
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inout my_metadata_t meta,
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inout standard_metadata_t standard_metadata)
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{
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state start { transition accept; }
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}
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/*************************************************************************
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************ C H E C K S U M V E R I F I C A T I O N *************
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*************************************************************************/
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control MyVerifyChecksum(
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inout my_headers_t hdr,
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inout my_metadata_t meta)
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{
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apply {
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}
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}
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/*************************************************************************
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************** I N G R E S S P R O C E S S I N G *******************
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*************************************************************************/
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control MyIngress(
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inout my_headers_t hdr,
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inout my_metadata_t meta,
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inout standard_metadata_t standard_metadata)
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{
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apply { }
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}
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/*************************************************************************
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**************** E G R E S S P R O C E S S I N G *******************
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*************************************************************************/
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control MyEgress(
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inout my_headers_t hdr,
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inout my_metadata_t meta,
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inout standard_metadata_t standard_metadata) {
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apply { }
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}
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/*************************************************************************
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************* C H E C K S U M C O M P U T A T I O N **************
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*************************************************************************/
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control MyComputeChecksum(
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inout my_headers_t hdr,
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inout my_metadata_t meta)
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{
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apply { }
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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(
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packet_out packet,
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in my_headers_t hdr)
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{
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apply { }
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}
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V1Switch(
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MyParser(),
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MyVerifyChecksum(),
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MyIngress(),
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MyEgress(),
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MyComputeChecksum(),
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MyDeparser()
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) main;
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