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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__
// TODO: implement report logic to external collector
control process_int_sink (
inout headers_t hdr,
inout local_metadata_t local_metadata,
inout standard_metadata_t standard_metadata) {
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);
// restore original dst port
local_metadata.int_meta.origin_port = hdr.intl4_tail.dest_port;
// remove all the INT information from the packet
hdr.int_header.setInvalid();
hdr.int_data.setInvalid();
hdr.intl4_shim.setInvalid();
hdr.intl4_tail.setInvalid();
}
action restore_port () {
hdr.udp.dst_port = local_metadata.int_meta.origin_port;
}
apply {
if (local_metadata.int_meta.sink == 1) {
int_sink();
restore_port();
}
}
}
#endif