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rsvp.p4
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/* -*- P4_16 -*- */
#include <core.p4>
#include <v1model.p4>
const bit<16> TYPE_IPV4 = 0x0800;
const bit<16> TYPE_MPLS = 0x8847;
#define CONST_MAX_LABELS 128
#define CONST_MAX_MPLS_HOPS 8
/*************************************************************************
*********************** H E A D E R S ***********************************
*************************************************************************/
typedef bit<9> egressSpec_t;
typedef bit<48> macAddr_t;
typedef bit<32> ip4Addr_t;
typedef bit<20> label_t;
header ethernet_t {
macAddr_t dstAddr;
macAddr_t srcAddr;
bit<16> etherType;
}
header mpls_t {
bit<20> label;
bit<3> exp;
bit<1> s;
bit<8> ttl;
}
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;
}
struct metadata {
// PART 2 TASK 1.1 Add metadata field
}
struct headers {
ethernet_t ethernet;
mpls_t[CONST_MAX_MPLS_HOPS] mpls;
ipv4_t ipv4;
}
/*************************************************************************
*********************** 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;
}
state parse_ethernet {
packet.extract(hdr.ethernet);
transition select(hdr.ethernet.etherType) {
TYPE_MPLS: parse_mpls;
TYPE_IPV4: parse_ipv4;
default: accept;
}
}
state parse_mpls {
packet.extract(hdr.mpls.next);
transition select(hdr.mpls.last.s) {
1: parse_ipv4;
default: parse_mpls;
}
}
state parse_ipv4 {
packet.extract(hdr.ipv4);
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) {
// PART 2 TASK 1.2 Define the direct meter (see v1model for more info)
action drop() {
mark_to_drop(standard_metadata);
}
action ipv4_forward(macAddr_t dstAddr, egressSpec_t port) {
hdr.ethernet.srcAddr = hdr.ethernet.dstAddr;
hdr.ethernet.dstAddr = dstAddr;
standard_metadata.egress_spec = port;
hdr.ipv4.ttl = hdr.ipv4.ttl - 1;
}
action mpls_ingress_1_hop(label_t label_1) {
// PART 2 TASK 1.4 Read meter
hdr.ethernet.etherType = TYPE_MPLS;
hdr.mpls.push_front(1);
hdr.mpls[0].setValid();
hdr.mpls[0].label = label_1;
hdr.mpls[0].ttl = hdr.ipv4.ttl - 1;
hdr.mpls[0].s = 1;
}
action mpls_ingress_2_hop(label_t label_1, label_t label_2) {
// PART 2 TASK 1.4 Read meter
hdr.ethernet.etherType = TYPE_MPLS;
hdr.mpls.push_front(1);
hdr.mpls[0].setValid();
hdr.mpls[0].label = label_1;
hdr.mpls[0].ttl = hdr.ipv4.ttl - 1;
hdr.mpls[0].s = 1;
hdr.mpls.push_front(1);
hdr.mpls[0].setValid();
hdr.mpls[0].label = label_2;
hdr.mpls[0].ttl = hdr.ipv4.ttl - 1;
hdr.mpls[0].s = 0;
}
action mpls_ingress_3_hop(label_t label_1, label_t label_2, label_t label_3) {
// PART 2 TASK 1.4 Read meter
hdr.ethernet.etherType = TYPE_MPLS;
hdr.mpls.push_front(1);
hdr.mpls[0].setValid();
hdr.mpls[0].label = label_1;
hdr.mpls[0].ttl = hdr.ipv4.ttl - 1;
hdr.mpls[0].s = 1;
hdr.mpls.push_front(1);
hdr.mpls[0].setValid();
hdr.mpls[0].label = label_2;
hdr.mpls[0].ttl = hdr.ipv4.ttl - 1;
hdr.mpls[0].s = 0;
hdr.mpls.push_front(1);
hdr.mpls[0].setValid();
hdr.mpls[0].label = label_3;
hdr.mpls[0].ttl = hdr.ipv4.ttl - 1;
hdr.mpls[0].s = 0;
}
action mpls_ingress_4_hop(label_t label_1, label_t label_2, label_t label_3, label_t label_4) {
// PART 2 TASK 1.4 Read meter
hdr.ethernet.etherType = TYPE_MPLS;
hdr.mpls.push_front(1);
hdr.mpls[0].setValid();
hdr.mpls[0].label = label_1;
hdr.mpls[0].ttl = hdr.ipv4.ttl - 1;
hdr.mpls[0].s = 1;
hdr.mpls.push_front(1);
hdr.mpls[0].setValid();
hdr.mpls[0].label = label_2;
hdr.mpls[0].ttl = hdr.ipv4.ttl - 1;
hdr.mpls[0].s = 0;
hdr.mpls.push_front(1);
hdr.mpls[0].setValid();
hdr.mpls[0].label = label_3;
hdr.mpls[0].ttl = hdr.ipv4.ttl - 1;
hdr.mpls[0].s = 0;
hdr.mpls.push_front(1);
hdr.mpls[0].setValid();
hdr.mpls[0].label = label_4;
hdr.mpls[0].ttl = hdr.ipv4.ttl - 1;
hdr.mpls[0].s = 0;
}
action mpls_ingress_5_hop(label_t label_1, label_t label_2, label_t label_3, label_t label_4, label_t label_5) {
// PART 2 TASK 1.4 Read meter
hdr.ethernet.etherType = TYPE_MPLS;
hdr.mpls.push_front(1);
hdr.mpls[0].setValid();
hdr.mpls[0].label = label_1;
hdr.mpls[0].ttl = hdr.ipv4.ttl - 1;
hdr.mpls[0].s = 1;
hdr.mpls.push_front(1);
hdr.mpls[0].setValid();
hdr.mpls[0].label = label_2;
hdr.mpls[0].ttl = hdr.ipv4.ttl - 1;
hdr.mpls[0].s = 0;
hdr.mpls.push_front(1);
hdr.mpls[0].setValid();
hdr.mpls[0].label = label_3;
hdr.mpls[0].ttl = hdr.ipv4.ttl - 1;
hdr.mpls[0].s = 0;
hdr.mpls.push_front(1);
hdr.mpls[0].setValid();
hdr.mpls[0].label = label_4;
hdr.mpls[0].ttl = hdr.ipv4.ttl - 1;
hdr.mpls[0].s = 0;
hdr.mpls.push_front(1);
hdr.mpls[0].setValid();
hdr.mpls[0].label = label_5;
hdr.mpls[0].ttl = hdr.ipv4.ttl - 1;
hdr.mpls[0].s = 0;
}
action mpls_ingress_6_hop(label_t label_1, label_t label_2, label_t label_3, label_t label_4, label_t label_5, label_t label_6) {
// PART 2 TASK 1.4 Read meter
hdr.ethernet.etherType = TYPE_MPLS;
hdr.mpls.push_front(1);
hdr.mpls[0].setValid();
hdr.mpls[0].label = label_1;
hdr.mpls[0].ttl = hdr.ipv4.ttl - 1;
hdr.mpls[0].s = 1;
hdr.mpls.push_front(1);
hdr.mpls[0].setValid();
hdr.mpls[0].label = label_2;
hdr.mpls[0].ttl = hdr.ipv4.ttl - 1;
hdr.mpls[0].s = 0;
hdr.mpls.push_front(1);
hdr.mpls[0].setValid();
hdr.mpls[0].label = label_3;
hdr.mpls[0].ttl = hdr.ipv4.ttl - 1;
hdr.mpls[0].s = 0;
hdr.mpls.push_front(1);
hdr.mpls[0].setValid();
hdr.mpls[0].label = label_4;
hdr.mpls[0].ttl = hdr.ipv4.ttl - 1;
hdr.mpls[0].s = 0;
hdr.mpls.push_front(1);
hdr.mpls[0].setValid();
hdr.mpls[0].label = label_5;
hdr.mpls[0].ttl = hdr.ipv4.ttl - 1;
hdr.mpls[0].s = 0;
hdr.mpls.push_front(1);
hdr.mpls[0].setValid();
hdr.mpls[0].label = label_6;
hdr.mpls[0].ttl = hdr.ipv4.ttl - 1;
hdr.mpls[0].s = 0;
}
action mpls_ingress_7_hop(label_t label_1, label_t label_2, label_t label_3, label_t label_4, label_t label_5, label_t label_6, label_t label_7) {
// PART 2 TASK 1.4 Read meter
hdr.ethernet.etherType = TYPE_MPLS;
hdr.mpls.push_front(1);
hdr.mpls[0].setValid();
hdr.mpls[0].label = label_1;
hdr.mpls[0].ttl = hdr.ipv4.ttl - 1;
hdr.mpls[0].s = 1;
hdr.mpls.push_front(1);
hdr.mpls[0].setValid();
hdr.mpls[0].label = label_2;
hdr.mpls[0].ttl = hdr.ipv4.ttl - 1;
hdr.mpls[0].s = 0;
hdr.mpls.push_front(1);
hdr.mpls[0].setValid();
hdr.mpls[0].label = label_3;
hdr.mpls[0].ttl = hdr.ipv4.ttl - 1;
hdr.mpls[0].s = 0;
hdr.mpls.push_front(1);
hdr.mpls[0].setValid();
hdr.mpls[0].label = label_4;
hdr.mpls[0].ttl = hdr.ipv4.ttl - 1;
hdr.mpls[0].s = 0;
hdr.mpls.push_front(1);
hdr.mpls[0].setValid();
hdr.mpls[0].label = label_5;
hdr.mpls[0].ttl = hdr.ipv4.ttl - 1;
hdr.mpls[0].s = 0;
hdr.mpls.push_front(1);
hdr.mpls[0].setValid();
hdr.mpls[0].label = label_6;
hdr.mpls[0].ttl = hdr.ipv4.ttl - 1;
hdr.mpls[0].s = 0;
hdr.mpls.push_front(1);
hdr.mpls[0].setValid();
hdr.mpls[0].label = label_7;
hdr.mpls[0].ttl = hdr.ipv4.ttl - 1;
hdr.mpls[0].s = 0;
}
action mpls_ingress_8_hop(label_t label_1, label_t label_2, label_t label_3, label_t label_4, label_t label_5, label_t label_6, label_t label_7, label_t label_8) {
// PART 2 TASK 1.4 Read meter
hdr.ethernet.etherType = TYPE_MPLS;
hdr.mpls.push_front(1);
hdr.mpls[0].setValid();
hdr.mpls[0].label = label_1;
hdr.mpls[0].ttl = hdr.ipv4.ttl - 1;
hdr.mpls[0].s = 1;
hdr.mpls.push_front(1);
hdr.mpls[0].setValid();
hdr.mpls[0].label = label_2;
hdr.mpls[0].ttl = hdr.ipv4.ttl - 1;
hdr.mpls[0].s = 0;
hdr.mpls.push_front(1);
hdr.mpls[0].setValid();
hdr.mpls[0].label = label_3;
hdr.mpls[0].ttl = hdr.ipv4.ttl - 1;
hdr.mpls[0].s = 0;
hdr.mpls.push_front(1);
hdr.mpls[0].setValid();
hdr.mpls[0].label = label_4;
hdr.mpls[0].ttl = hdr.ipv4.ttl - 1;
hdr.mpls[0].s = 0;
hdr.mpls.push_front(1);
hdr.mpls[0].setValid();
hdr.mpls[0].label = label_5;
hdr.mpls[0].ttl = hdr.ipv4.ttl - 1;
hdr.mpls[0].s = 0;
hdr.mpls.push_front(1);
hdr.mpls[0].setValid();
hdr.mpls[0].label = label_6;
hdr.mpls[0].ttl = hdr.ipv4.ttl - 1;
hdr.mpls[0].s = 0;
hdr.mpls.push_front(1);
hdr.mpls[0].setValid();
hdr.mpls[0].label = label_7;
hdr.mpls[0].ttl = hdr.ipv4.ttl - 1;
hdr.mpls[0].s = 0;
hdr.mpls.push_front(1);
hdr.mpls[0].setValid();
hdr.mpls[0].label = label_8;
hdr.mpls[0].ttl = hdr.ipv4.ttl - 1;
hdr.mpls[0].s = 0;
}
table FEC_tbl {
key = {
hdr.ipv4.srcAddr: lpm;
hdr.ipv4.dstAddr: exact;
}
actions = {
ipv4_forward;
mpls_ingress_1_hop;
mpls_ingress_2_hop;
mpls_ingress_3_hop;
mpls_ingress_4_hop;
mpls_ingress_5_hop;
mpls_ingress_6_hop;
mpls_ingress_7_hop;
mpls_ingress_8_hop;
NoAction;
}
default_action = NoAction();
// PART 2 TASK 1.3 Associate table with meter
size = 256;
}
action mpls_forward(macAddr_t dstAddr, egressSpec_t port) {
hdr.ethernet.srcAddr = hdr.ethernet.dstAddr;
hdr.ethernet.dstAddr = dstAddr;
standard_metadata.egress_spec = port;
hdr.mpls[1].ttl = hdr.mpls[0].ttl - 1;
hdr.mpls.pop_front(1);
}
action penultimate(macAddr_t dstAddr, egressSpec_t port) {
hdr.ethernet.etherType = TYPE_IPV4;
hdr.ethernet.srcAddr = hdr.ethernet.dstAddr;
hdr.ethernet.dstAddr = dstAddr;
hdr.ipv4.ttl = hdr.mpls[0].ttl - 1;
standard_metadata.egress_spec = port;
hdr.mpls.pop_front(1);
}
table mpls_tbl {
key = {
hdr.mpls[0].label: exact;
hdr.mpls[0].s: exact;
}
actions = {
mpls_forward;
penultimate;
NoAction;
}
default_action = NoAction();
size = CONST_MAX_LABELS;
}
apply {
/* Ingress Pipeline Control Logic */
if(hdr.ipv4.isValid()){
FEC_tbl.apply();
}
if(hdr.mpls[0].isValid()){
mpls_tbl.apply();
}
// PART 2 TASK 1.5 Drop all the packets for which the color is not green
}
}
/*************************************************************************
**************** 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 {
}
}
/*************************************************************************
************* 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 {
// We have modified the ip ttl, so we have to compute the new checksum
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);
}
}
/*************************************************************************
*********************** D E P A R S E R *******************************
*************************************************************************/
control MyDeparser(packet_out packet, in headers hdr) {
apply {
packet.emit(hdr.ethernet);
packet.emit(hdr.mpls);
packet.emit(hdr.ipv4);
}
}
/*************************************************************************
*********************** S W I T C H *******************************
*************************************************************************/
V1Switch(
MyParser(),
MyVerifyChecksum(),
MyIngress(),
MyEgress(),
MyComputeChecksum(),
MyDeparser()
) main;