blob: 0e13cfdfdb6886855d1cccaf09d98307df5774f6 [file] [log] [blame]
Yi Tsengbe342052017-11-03 10:21:23 -07001/*
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#ifndef __PARSER__
18#define __PARSER__
19
20#include "define.p4"
21
22parser FabricParser (
23packet_in packet,
24out parsed_headers_t hdr,
25inout fabric_metadata_t fabric_metadata,
26inout standard_metadata_t standard_metadata) {
27 state start {
28 transition select(standard_metadata.ingress_port) {
29 CPU_PORT: parse_packet_out;
30 default: parse_ethernet;
31 }
32 }
33
34 state parse_packet_out {
35 packet.extract(hdr.packet_out);
36 transition parse_ethernet;
37 }
38
39 state parse_ethernet {
40 packet.extract(hdr.ethernet);
41 transition select(hdr.ethernet.ether_type){
42 ETHERTYPE_QINQ_NON_STD: parse_vlan_tag;
43 ETHERTYPE_QINQ: parse_vlan_tag;
44 ETHERTYPE_VLAN: parse_vlan_tag;
45 ETHERTYPE_MPLS: parse_mpls;
46 ETHERTYPE_ARP: parse_arp;
47 ETHERTYPE_IPV4: parse_ipv4;
48 ETHERTYPE_IPV6: parse_ipv6;
49 default: accept;
50 }
51 }
52
53 state parse_vlan_tag {
54 packet.extract(hdr.vlan_tag);
55 transition select(hdr.vlan_tag.ether_type){
56 ETHERTYPE_VLAN: parse_inner_vlan_tag;
57 ETHERTYPE_ARP: parse_arp;
58 ETHERTYPE_IPV4: parse_ipv4;
59 ETHERTYPE_IPV6: parse_ipv6;
60 default: accept;
61 }
62 }
63
64 state parse_inner_vlan_tag {
65 packet.extract(hdr.inner_vlan_tag);
66 transition select(hdr.vlan_tag.ether_type){
67 ETHERTYPE_ARP: parse_arp;
68 ETHERTYPE_IPV4: parse_ipv4;
69 ETHERTYPE_IPV6: parse_ipv6;
70 default: accept;
71 }
72 }
73
74 state parse_mpls {
75 packet.extract(hdr.mpls);
76
77 //There is only one MPLS label for this fabric.
78 transition select(packet.lookahead<ipv4_t>().version) {
79 //The packet should be either IPv4 or IPv6.
80 IP_VERSION_4: parse_ipv4;
81 IP_VERSION_6: parse_ipv6;
82 default: parse_ethernet;
83 }
84 }
85
86 state parse_ipv4 {
87 packet.extract(hdr.ipv4);
88 fabric_metadata.ip_proto = hdr.ipv4.protocol;
89 //Need header verification?
90 transition select(hdr.ipv4.protocol) {
91 PROTO_TCP: parse_tcp;
92 PROTO_UDP: parse_udp;
93 PROTO_ICMP: parse_icmp;
94 default: accept;
95 }
96 }
97
98 state parse_ipv6 {
99 packet.extract(hdr.ipv6);
100 fabric_metadata.ip_proto = hdr.ipv6.next_hdr;
101 transition select(hdr.ipv6.next_hdr) {
102 PROTO_TCP: parse_tcp;
103 PROTO_UDP: parse_udp;
104 PROTO_ICMPV6: parse_icmp;
105 default: accept;
106 }
107 }
108
109 state parse_arp {
110 packet.extract(hdr.arp);
111 transition accept;
112 }
113
114 state parse_tcp {
115 packet.extract(hdr.tcp);
116 fabric_metadata.l4_src_port = hdr.tcp.src_port;
117 fabric_metadata.l4_dst_port = hdr.tcp.dst_port;
118 transition accept;
119 }
120
121 state parse_udp {
122 packet.extract(hdr.udp);
123 fabric_metadata.l4_src_port = hdr.udp.src_port;
124 fabric_metadata.l4_dst_port = hdr.udp.dst_port;
125 transition accept;
126 }
127
128 state parse_icmp {
129 packet.extract(hdr.icmp);
130 transition accept;
131 }
132}
133
134control FabricDeparser(packet_out packet, in parsed_headers_t hdr) {
135 apply{
136 packet.emit(hdr.packet_in);
137 packet.emit(hdr.ethernet);
138 packet.emit(hdr.vlan_tag);
139 packet.emit(hdr.inner_vlan_tag);
140 packet.emit(hdr.mpls);
141 packet.emit(hdr.arp);
142 packet.emit(hdr.ipv4);
143 packet.emit(hdr.ipv6);
144 packet.emit(hdr.tcp);
145 packet.emit(hdr.udp);
146 }
147}
148
149#endif