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/*
* Copyright 2017-present Open Networking Foundation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/* -*- P4_16 -*- */
#ifndef __INT_SINK__
#define __INT_SINK__
control process_int_sink (
inout headers_t hdr,
inout local_metadata_t local_metadata,
inout standard_metadata_t standard_metadata) {
action restore_header () {
hdr.udp.dst_port = hdr.intl4_tail.dest_port;
hdr.ipv4.dscp = (bit<6>)hdr.intl4_tail.dscp;
}
action int_sink() {
// restore length fields of IPv4 header and UDP header
hdr.ipv4.len = hdr.ipv4.len - (bit<16>)((hdr.intl4_shim.len - (bit<8>)hdr.int_header.ins_cnt) << 2);
hdr.udp.length_ = hdr.udp.length_ - (bit<16>)((hdr.intl4_shim.len - (bit<8>)hdr.int_header.ins_cnt) << 2);
// remove all the INT information from the packet
hdr.int_header.setInvalid();
hdr.int_data.setInvalid();
hdr.intl4_shim.setInvalid();
hdr.intl4_tail.setInvalid();
hdr.int_switch_id.setInvalid();
hdr.int_port_ids.setInvalid();
hdr.int_hop_latency.setInvalid();
hdr.int_q_occupancy.setInvalid();
hdr.int_ingress_tstamp.setInvalid();
hdr.int_egress_tstamp.setInvalid();
hdr.int_q_congestion.setInvalid();
hdr.int_egress_tx_util.setInvalid();
}
apply {
restore_header();
int_sink();
}
}
#endif