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Jonghwan Hyun4a9a6712017-11-13 14:43:55 -08001/*
2 * Copyright 2017-present Open Networking Foundation
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17/* -*- P4_16 -*- */
18#ifndef __INT_SINK__
19#define __INT_SINK__
20
21// TODO: implement report logic to external collector
22control process_int_sink (
23 inout headers_t hdr,
24 inout local_metadata_t local_metadata,
25 inout standard_metadata_t standard_metadata) {
Jonghwan Hyun8be03392017-12-04 15:48:44 -080026 action restore_header () {
27 hdr.udp.dst_port = hdr.intl4_tail.dest_port;
28 hdr.ipv4.dscp = (bit<6>)hdr.intl4_tail.dscp;
29 }
30
Jonghwan Hyun4a9a6712017-11-13 14:43:55 -080031 action int_sink() {
32 // restore length fields of IPv4 header and UDP header
33 hdr.ipv4.len = hdr.ipv4.len - (bit<16>)((hdr.intl4_shim.len - (bit<8>)hdr.int_header.ins_cnt) << 2);
34 hdr.udp.length_ = hdr.udp.length_ - (bit<16>)((hdr.intl4_shim.len - (bit<8>)hdr.int_header.ins_cnt) << 2);
Jonghwan Hyun4a9a6712017-11-13 14:43:55 -080035 // remove all the INT information from the packet
36 hdr.int_header.setInvalid();
37 hdr.int_data.setInvalid();
38 hdr.intl4_shim.setInvalid();
39 hdr.intl4_tail.setInvalid();
Jonghwan Hyun8be03392017-12-04 15:48:44 -080040 hdr.int_switch_id.setInvalid();
41 hdr.int_port_ids.setInvalid();
42 hdr.int_hop_latency.setInvalid();
43 hdr.int_q_occupancy.setInvalid();
44 hdr.int_ingress_tstamp.setInvalid();
45 hdr.int_egress_tstamp.setInvalid();
46 hdr.int_q_congestion.setInvalid();
47 hdr.int_egress_tx_util.setInvalid();
Jonghwan Hyun4a9a6712017-11-13 14:43:55 -080048 }
49
50 apply {
Jonghwan Hyunf5d57822018-05-09 10:19:50 -070051 restore_header();
52 int_sink();
Jonghwan Hyun4a9a6712017-11-13 14:43:55 -080053 }
54}
55#endif