-
Notifications
You must be signed in to change notification settings - Fork 4
/
Copy pathpacketinout_idletimeout.p4
356 lines (301 loc) · 10.3 KB
/
packetinout_idletimeout.p4
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
/*
__author__ = 'Cuong Tran'
__email__ = '[email protected]'
__licence__ = 'GPL2.0'
__version__ = '2.0' 202401
*/
/* -*- P4_16 -*- */
#include <core.p4>
#include <v1model.p4>
//compile the packetinout.p4 file by: p4c-bm2-ss --p4v 16 --p4runtime-files build/packetinout.p4info.txt -o build/packetinout.json packetinout.p4
#define CPU_PORT 255
// then start p4_switch by: sudo simple_switch_grpc -i 1@eth1 -i 2@eth2 -i 3@eth3 --pcap pcaps --nanolog ipc:///tmp/s1-log.ipc --device-id 1 build/packetout.json --log-console --thrift-port 9090 -- --grpc-server-addr 0.0.0.0:50051 --cpu-port 255 (the cpu-port in the start command must be the same, as it is the parse value in the function MyParser below)
const bit<16> TYPE_IPV4 = 0x800;
const bit<16> TYPE_ARP = 0x806;
/*************************************************************************
*********************** H E A D E R S ***********************************
*************************************************************************/
typedef bit<9> egressSpec_t;
typedef bit<48> macAddr_t;
typedef bit<32> ip4Addr_t;
struct meta_t {
bit<32> ipv4_sa;
bit<32> ipv4_da;
bit<16> tcp_sp;
bit<16> tcp_dp;
bit<32> nhop_ipv4;
bit<32> if_ipv4_addr;
bit<48> if_mac_addr;
bit<1> is_ext_if;
bit<16> l4Length; // Layer 4's length
bit<8> if_index;
}
header ethernet_t {
macAddr_t dstAddr;
macAddr_t srcAddr;
bit<16> etherType;
}
//ref: http://csie.nqu.edu.tw/smallko/sdn/LBP4.htm
header arp_t {
bit<16> htype;
bit<16> ptype;
bit<8> hlen;
bit<8> plen;
bit<16> opcode;
bit<48> hwSrcAddr;
bit<32> protoSrcAddr;
bit<48> hwDstAddr;
bit<32> protoDstAddr;
}
header ipv4_t {
bit<4> version;
bit<4> ihl;
bit<8> diffserv;
bit<16> totalLen;
bit<16> identification;
bit<3> flags;
bit<13> fragOffset;
bit<8> ttl;
bit<8> protocol;
bit<16> hdrChecksum;
ip4Addr_t srcAddr;
ip4Addr_t dstAddr;
}
header tcp_t {
bit<16> srcPort;
bit<16> dstPort;
bit<32> seqNo;
bit<32> ackNo;
bit<4> dataOffset;
bit<4> res;
bit<8> flags;
bit<16> window;
bit<16> checksum;
bit<16> urgentPtr;
}
header udp_t {
bit<16> srcPort;
bit<16> dstPort;
bit<16> length_;
bit<16> checksum;
}
struct metadata {
/* empty */
@name(".meta")
meta_t meta;
}
@controller_header("packet_in")
header packet_in_header_t {
bit<9> ingress_port;
bit<7> _pad;
//source: https://github.com/opennetworkinglab/ngsdn-tutorial/blob/advanced/solution/p4src/main.p4
}
@controller_header("packet_out")
header packet_out_header_t {
bit<9> egress_port; // egress_port is 9-bit wide
//bit<16> egress_port;
bit<7> _pad; //padding
//source: https://github.com/opennetworkinglab/ngsdn-tutorial/blob/advanced/solution/p4src/main.p4
}
struct headers {
packet_out_header_t packet_out;
packet_in_header_t packet_in;
@name(".ethernet")
ethernet_t ethernet;
@name(".arp")
arp_t arp;
@name(".ipv4")
ipv4_t ipv4;
@name(".tcp")
tcp_t tcp;
@name(".udp")
udp_t udp;
}
/*************************************************************************
*********************** P A R S E R ***********************************
*************************************************************************/
parser MyParser(packet_in packet,
out headers hdr,
inout metadata meta,
inout standard_metadata_t standard_metadata) {
state start {
//transition parse_ethernet;
transition select(standard_metadata.ingress_port) {
CPU_PORT: parse_packet_out;
default: parse_ethernet;
}
}
state parse_packet_out {
packet.extract(hdr.packet_out);
transition parse_ethernet;
}
state parse_ethernet {
packet.extract(hdr.ethernet);
transition select(hdr.ethernet.etherType) {
TYPE_ARP: parse_arp;
TYPE_IPV4: parse_ipv4;
default: accept;
}
}
@name(".parse_arp") state parse_arp {
packet.extract(hdr.arp);
transition accept;
}
state parse_ipv4 {
packet.extract(hdr.ipv4);
meta.meta.ipv4_sa = hdr.ipv4.srcAddr;
meta.meta.ipv4_da = hdr.ipv4.dstAddr;
meta.meta.l4Length = hdr.ipv4.totalLen - 16w20;
transition select(hdr.ipv4.protocol) {
8w6: parse_tcp;
8w17: parse_udp;
default: accept;
}
//transition accept;
}
@name(".parse_tcp") state parse_tcp {
packet.extract(hdr.tcp);
meta.meta.tcp_sp = hdr.tcp.srcPort;
meta.meta.tcp_dp = hdr.tcp.dstPort;
transition accept;
}
@name(".parse_udp") state parse_udp {
packet.extract(hdr.udp);
transition accept;
}
}
/*************************************************************************
************ C H E C K S U M V E R I F I C A T I O N *************
*************************************************************************/
control MyVerifyChecksum(inout headers hdr, inout metadata meta) {
apply { }
}
/*************************************************************************
************** I N G R E S S P R O C E S S I N G *******************
*************************************************************************/
control MyIngress(inout headers hdr,
inout metadata meta,
inout standard_metadata_t standard_metadata) {
action drop() {
mark_to_drop(standard_metadata);
}
action send_to_cpu() {
standard_metadata.egress_spec = CPU_PORT;
}
table smac {
key = {
hdr.ethernet.srcAddr: exact;
}
actions = {
send_to_cpu;
NoAction;
}
size = 256;
default_action = send_to_cpu;
}
action forward(bit<9> egress_port) {
standard_metadata.egress_spec = egress_port;
}
table dmac {
key = {
hdr.ethernet.dstAddr: exact;
}
actions = {
forward;
send_to_cpu;
NoAction;
}
size = 256;
support_timeout = true;
default_action = send_to_cpu;
}
action set_mcast_grp(bit<16> mcast_grp) {
standard_metadata.mcast_grp = mcast_grp;
}
apply {
if (hdr.packet_out.isValid()) {
// Implement logic such that if this is a packet-out from the
// controller:
// 1. Set the packet egress port to that found in the cpu_out header
// 2. Remove (set invalid) the cpu_out header
// 3. Exit the pipeline here (no need to go through other tables
standard_metadata.egress_spec = hdr.packet_out.egress_port;
hdr.packet_out.setInvalid();
exit;
}
if (smac.apply().hit){
dmac.apply();
}
}
}
/*************************************************************************
**************** E G R E S S P R O C E S S I N G *******************
*************************************************************************/
control MyEgress(inout headers hdr,
inout metadata meta,
inout standard_metadata_t standard_metadata) {
apply {
if (standard_metadata.egress_port == CPU_PORT) {
// Implement logic such that if the packet is to be forwarded to the
// CPU port, e.g., if in ingress we matched on the ACL table with
// action send/clone_to_cpu...
// 1. Set cpu_in header as valid
// 2. Set the cpu_in.ingress_port field to the original packet's
// ingress port (standard_metadata.ingress_port).
hdr.packet_in.setValid();
hdr.packet_in.ingress_port = standard_metadata.ingress_port;
exit;
}
}
}
/*************************************************************************
************* C H E C K S U M C O M P U T A T I O N **************
*************************************************************************/
control MyComputeChecksum(inout headers hdr, inout metadata meta) {
apply {
update_checksum(
hdr.ipv4.isValid(),
{ hdr.ipv4.version,
hdr.ipv4.ihl,
hdr.ipv4.diffserv,
hdr.ipv4.totalLen,
hdr.ipv4.identification,
hdr.ipv4.flags,
hdr.ipv4.fragOffset,
hdr.ipv4.ttl,
hdr.ipv4.protocol,
hdr.ipv4.srcAddr,
hdr.ipv4.dstAddr },
hdr.ipv4.hdrChecksum,
HashAlgorithm.csum16);
//update_checksum_with_payload(true, { hdr.ipv4.srcAddr, hdr.ipv4.dstAddr, 8w0, hdr.ipv4.protocol, meta.meta.l4Length, hdr.tcp.srcPort, hdr.tcp.dstPort, hdr.tcp.seqNo, hdr.tcp.ackNo, hdr.tcp.dataOffset, hdr.tcp.res, hdr.tcp.flags, hdr.tcp.window, hdr.tcp.urgentPtr }, hdr.tcp.checksum, HashAlgorithm.csum16);
update_checksum_with_payload(hdr.tcp.isValid(), { hdr.ipv4.srcAddr, hdr.ipv4.dstAddr, 8w0, hdr.ipv4.protocol, meta.meta.l4Length, hdr.tcp.srcPort, hdr.tcp.dstPort, hdr.tcp.seqNo, hdr.tcp.ackNo, hdr.tcp.dataOffset, hdr.tcp.res, hdr.tcp.flags, hdr.tcp.window, hdr.tcp.urgentPtr }, hdr.tcp.checksum, HashAlgorithm.csum16);
update_checksum_with_payload(hdr.udp.isValid(), { hdr.ipv4.srcAddr, hdr.ipv4.dstAddr, 8w0, hdr.ipv4.protocol, meta.meta.l4Length, hdr.udp.srcPort, hdr.udp.dstPort, hdr.udp.length_ }, hdr.udp.checksum, HashAlgorithm.csum16);
}
}
/*************************************************************************
*********************** D E P A R S E R *******************************
*************************************************************************/
control MyDeparser(packet_out packet, in headers hdr) {
apply {
//parsed headers have to be added again into the packet.
packet.emit(hdr.packet_in);
packet.emit(hdr.ethernet);
packet.emit(hdr.arp);
packet.emit(hdr.ipv4);
packet.emit(hdr.tcp);
packet.emit(hdr.udp);
}
}
/*************************************************************************
*********************** S W I T C H *******************************
*************************************************************************/
//switch architecture
V1Switch(
MyParser(),
MyVerifyChecksum(),
MyIngress(),
MyEgress(),
MyComputeChecksum(),
MyDeparser()
) main;