123 lines
3.1 KiB
Text
123 lines
3.1 KiB
Text
/* -*- P4_16 -*- */
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#include <core.p4>
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#include <v1model.p4>
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#include "headers.p4"
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#include "parsers.p4"
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#include "checksums.p4"
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#include "settings.p4"
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/*************************************************************************
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************** I N G R E S S P R O C E S S I N G *******************
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*************************************************************************/
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control MyIngress(inout headers hdr,
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inout metadata meta,
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inout standard_metadata_t standard_metadata) {
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/* use for debugging and controlling flows */
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action send_to_controller() {
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clone3(CloneType.I2E, 100, meta);
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}
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/********************** ADDRESS TABLES ***********************************/
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action icmp6_answer() {
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if(hdr.icmp6.isValid()) {
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if(hdr.icmp6.code == ICMP6_ECHO_REQUEST) {
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ipv6_addr_t tmp = hdr.ipv6.src_addr;
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hdr.ipv6.src_addr = hdr.ipv6.dst_addr;
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hdr.ipv6.dst_addr = tmp;
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hdr.icmp6.code = ICMP6_ECHO_REPLY;
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}
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}
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/* do something:
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- change src/dst
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- change type
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*/
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}
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table v6_addresses {
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key = {
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hdr.ipv6.dst_addr: exact;
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// hdr.ipv6.next_header: exact;
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}
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actions = {
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icmp6_answer;
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send_to_controller;
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NoAction;
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}
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size = ADDRESS_TABLE_SIZE;
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default_action = send_to_controller;
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}
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/********************** ROUTING (egress definiton) TABLES ***********************************/
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action set_egress_port (port_t out_port) {
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standard_metadata.egress_spec = out_port;
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}
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table v6_routing {
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key = {
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hdr.ipv6.dst_addr: lpm;
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}
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actions = {
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set_egress_port;
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NoAction;
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}
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size = ROUTING_TABLE_SIZE;
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default_action = NoAction;
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}
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table v4_routing {
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key = {
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hdr.ipv4.dst_addr: lpm;
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}
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actions = {
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set_egress_port;
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NoAction;
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}
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size = ROUTING_TABLE_SIZE;
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default_action = NoAction;
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}
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apply {
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if(hdr.ipv6.isValid()) {
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v6_addresses.apply();
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v6_routing.apply();
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}
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if(hdr.ipv4.isValid()) {
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v4_routing.apply();
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}
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}
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}
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/*************************************************************************
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**************** E G R E S S P R O C E S S I N G *******************
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*************************************************************************/
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control MyEgress(inout headers hdr,
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inout metadata meta,
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inout standard_metadata_t standard_metadata) {
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apply {
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/* set tcp header valid after modifying it -- keep this in mind*/
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// hdr.tcp.setValid();
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}
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}
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/*************************************************************************
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*********************** S W I T C H *******************************
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*************************************************************************/
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V1Switch(
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MyParser(),
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MyVerifyChecksum(),
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MyIngress(),
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MyEgress(),
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MyComputeChecksum(),
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MyDeparser()
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) main;
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