P4 is an open source programming language created in 2014.
| #543on PLDB | 10Years Old | 574Repos |
P4 is a programming language designed to allow programming of packet forwarding planes. In contrast to a general purpose language such as C or Python, P4 is a domain-specific language with a number of constructs optimized around network data forwarding. P4 is an open-source, permissively licensed language and is maintained by a non-profit organization called the P4 Language Consortium. Read more on Wikipedia...
// Copyright 2015, Barefoot Networks, Inc.
//
// 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.
action set_mirror_id(session_id) {
clone_ingress_pkt_to_egress(session_id);
}
table mirror_acl {
reads {
ingress_metadata.if_label : ternary;
ingress_metadata.bd_label : ternary;
/* ip acl */
ingress_metadata.lkp_ipv4_sa : ternary;
ingress_metadata.lkp_ipv4_da : ternary;
ingress_metadata.lkp_ip_proto : ternary;
/* mac acl */
ingress_metadata.lkp_mac_sa : ternary;
ingress_metadata.lkp_mac_da : ternary;
ingress_metadata.lkp_mac_type : ternary;
}
actions {
nop;
set_mirror_id;
}
size : INGRESS_MIRROR_ACL_TABLE_SIZE;
}
| Feature | Supported | Token | Example |
|---|---|---|---|
| MultiLine Comments | ✓ | /* */ | /* A comment */ |
| Comments | ✓ | // A comment |
|
| Line Comments | ✓ | // | // A comment |
| Semantic Indentation | X |