| Jonghwan Hyun | 4a9a671 | 2017-11-13 14:43:55 -0800 | [diff] [blame^] | 1 | /* |
| 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 |
| 22 | control process_int_sink ( |
| 23 | inout headers_t hdr, |
| 24 | inout local_metadata_t local_metadata, |
| 25 | inout standard_metadata_t standard_metadata) { |
| 26 | action int_sink() { |
| 27 | // restore length fields of IPv4 header and UDP header |
| 28 | hdr.ipv4.len = hdr.ipv4.len - (bit<16>)((hdr.intl4_shim.len - (bit<8>)hdr.int_header.ins_cnt) << 2); |
| 29 | hdr.udp.length_ = hdr.udp.length_ - (bit<16>)((hdr.intl4_shim.len - (bit<8>)hdr.int_header.ins_cnt) << 2); |
| 30 | // restore original dst port |
| 31 | local_metadata.int_meta.origin_port = hdr.intl4_tail.dest_port; |
| 32 | // remove all the INT information from the packet |
| 33 | hdr.int_header.setInvalid(); |
| 34 | hdr.int_data.setInvalid(); |
| 35 | hdr.intl4_shim.setInvalid(); |
| 36 | hdr.intl4_tail.setInvalid(); |
| 37 | } |
| 38 | |
| 39 | action restore_port () { |
| 40 | hdr.udp.dst_port = local_metadata.int_meta.origin_port; |
| 41 | } |
| 42 | |
| 43 | apply { |
| 44 | if (local_metadata.int_meta.sink == 1) { |
| 45 | int_sink(); |
| 46 | restore_port(); |
| 47 | } |
| 48 | } |
| 49 | } |
| 50 | #endif |