637 lines
18 KiB
Text
637 lines
18 KiB
Text
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#include <core.p4>
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#include <sume_switch.p4>
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#include "headers.p4"
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/********************************************************************************
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* Header
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*/
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typedef bit<48> EthAddr_t;
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header Ethernet_h {
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EthAddr_t dstAddr;
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EthAddr_t srcAddr;
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bit<16> etherType;
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}
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struct Parsed_packet {
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Ethernet_h ethernet;
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}
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// user defined metadata: can be used to share information between
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// TopParser, TopPipe, and TopDeparser
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struct user_metadata_t {
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bit<8> unused;
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}
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// digest_data, MUST be 256 bits -- what is this used for?
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struct digest_data_t {
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bit<256> unused;
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}
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/********************************************************************************
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* Parser
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*/
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@Xilinx_MaxPacketRegion(1024)
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parser TopParser(packet_in b,
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out Parsed_packet p,
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out user_metadata_t user_metadata,
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out digest_data_t digest_data,
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inout sume_metadata_t sume_metadata) {
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state start {
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b.extract(p.ethernet);
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user_metadata.unused = 0;
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digest_data.unused = 0;
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transition accept;
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}
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}
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/********************************************************************************
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* Main
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*/
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control TopPipe(inout Parsed_packet p,
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inout user_metadata_t user_metadata,
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inout digest_data_t digest_data,
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inout sume_metadata_t sume_metadata) {
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action drop() {
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mark_to_drop();
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}
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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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action set_egress_port_and_mac (port_t out_port, mac_addr_t mac_addr) {
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hdr.ethernet.dst_addr = mac_addr;
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standard_metadata.egress_spec = out_port;
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}
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action controller_reply(task_t task) {
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meta.task = task;
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meta.ingress_port = standard_metadata.ingress_port;
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clone3(CloneType.I2E, 100, meta);
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}
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action controller_debug_table_id(table_t table_id) {
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meta.table_id = table_id;
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controller_reply(TASK_DEBUG);
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}
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action controller_debug() {
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controller_reply(TASK_DEBUG);
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}
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action multicast_pkg(mcast_t mcast_grp) { /* Output PKG on correct ports (plural) */
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standard_metadata.mcast_grp = mcast_grp;
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}
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/********************** NAT64 / NAT46 ACTIONS GENERIC ***********************************/
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/* changes for icmp6 -> icmp */
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action nat64_icmp6_generic()
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{
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hdr.icmp.setValid();
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hdr.ipv4.protocol = PROTO_ICMP; // overwrite generic same protocol assumption
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/* trigger checksumming */
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meta.switch_task = TASK_CHECKSUM_ICMP;
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meta.chk_icmp = 1;
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hdr.icmp6.setInvalid();
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/* not needed, as we don't translate them (yet/ever) */
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hdr.icmp6_na_ns.setInvalid();
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hdr.icmp6_option_link_layer_addr.setInvalid();
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}
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/* NAT64 protocol unspecific changes */
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action nat64_generic(ipv4_addr_t src, ipv4_addr_t dst) {
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hdr.ipv4.setValid();
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meta.chk_ipv4 = 1; /* need to calculate the hdrchecksum */
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/* Stuff that might need to be fixed */
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hdr.ipv4.version = (bit<4>)4;
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hdr.ipv4.diff_serv = (bit<6>)0; // no ToS
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hdr.ipv4.ecn = (bit<2>)0; // unsupported
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/* 5 is ok as long as we don't use options / padding /
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anything after the destination address */
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hdr.ipv4.ihl = (bit<4>) 5; // internet header length: 4*5 = 20
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hdr.ipv4.totalLen = (bit<16>) hdr.ipv6.payload_length + 20; // ok under above constraints
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hdr.ipv4.identification = (bit<16>) 0; // no support for fragments
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hdr.ipv4.flags = (bit<3>) 0; // DF bit and more fragments
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hdr.ipv4.fragOffset = (bit<13>) 0; // 0 as there are no fragments
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/* Stuff that should be fine */
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hdr.ethernet.ethertype = TYPE_IPV4;
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hdr.ipv4.dst_addr = dst;
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hdr.ipv4.src_addr = src;
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hdr.ipv4.ttl = hdr.ipv6.hop_limit;
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hdr.ipv4.protocol = hdr.ipv6.next_header;
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hdr.ipv6.setInvalid();
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}
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/* nat64_prefix is the same as the matching key, but without the mask */
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action nat64_static(ipv6_addr_t v6_src, ipv4_addr_t v4_dst, ipv6_addr_t nat64_prefix) {
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ipv6_addr_t src_offset = hdr.ipv6.src_addr - v6_src;
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ipv4_addr_t src = v4_dst + (ipv4_addr_t) src_offset;
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ipv4_addr_t dst = (ipv4_addr_t) (hdr.ipv6.dst_addr - nat64_prefix);
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nat64_generic(src, dst);
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}
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/* From https://tools.ietf.org/html/rfc792 (IPv4)
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Echo or Echo Reply Message
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0 1 2 3
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0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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| Type | Code | Checksum |
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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| Identifier | Sequence Number |
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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| Data ...
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+-+-+-+-+-
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From https://tools.ietf.org/html/rfc4443#section-4.1
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4.1. Echo Request Message
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0 1 2 3
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0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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| Type | Code | Checksum |
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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| Identifier | Sequence Number |
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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| Data ...
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+-+-+-+-+-
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4.2. Echo Reply Message
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0 1 2 3
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0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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| Type | Code | Checksum |
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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| Identifier | Sequence Number |
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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| Data ...
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+-+-+-+-+-
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Type / code are different in ICMP4 and ICMP6!
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*/
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/* changes for icmp6 -> icmp */
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action nat46_icmp_generic()
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{
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hdr.icmp6.setValid();
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hdr.ipv6.next_header = PROTO_ICMP6;
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meta.chk_icmp6 = 1;
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meta.cast_length = (bit<32>) hdr.ipv6.payload_length;
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hdr.icmp.setInvalid();
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}
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/* NAT46: protocol unspecific changes */
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action nat46_generic(ipv6_addr_t src, ipv6_addr_t dst) {
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hdr.ipv6.setValid();
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hdr.ipv4.setInvalid();
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hdr.ethernet.ethertype = TYPE_IPV6;
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hdr.ipv6.dst_addr = dst;
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hdr.ipv6.src_addr = src;
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hdr.ipv6.version = (bit<4>)6;
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hdr.ipv6.traffic_class = (bit<8>) hdr.ipv4.diff_serv;
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hdr.ipv6.flow_label = (bit<20>) 0;
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hdr.ipv6.payload_length = (bit<16>) hdr.ipv4.totalLen - 20;
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hdr.ipv6.next_header = hdr.ipv4.protocol;
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hdr.ipv6.hop_limit = hdr.ipv4.ttl;
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}
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/* matching key: v4_network specified again */
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action nat46_static(ipv6_addr_t v6_src, ipv4_addr_t v4_dst, ipv6_addr_t nat64_prefix) {
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ipv6_addr_t src = nat64_prefix + (ipv6_addr_t) hdr.ipv4.src_addr;
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ipv4_addr_t dst_offset = hdr.ipv4.dst_addr - v4_dst;
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ipv6_addr_t dst = v6_src + (ipv6_addr_t) dst_offset;
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nat46_generic(src, dst);
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}
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table nat64 {
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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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controller_debug;
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nat64_static;
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controller_debug_table_id;
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NoAction;
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}
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size = NAT64_TABLE_SIZE;
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// default_action = controller_debug_table_id(TABLE_NAT64);
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default_action = NoAction;
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}
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table nat46 {
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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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controller_debug;
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nat46_static;
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controller_debug_table_id;
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NoAction;
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}
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size = NAT64_TABLE_SIZE;
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default_action = controller_debug_table_id(TABLE_NAT46);
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}
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/********************** NAT64 sessions ***********************************/
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/* automatic translations */
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action nat64_tcp_session_translate(
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ipv4_addr_t src_addr,
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bit<16> src_port,
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ipv4_addr_t dst_addr,
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bit<16> dst_port)
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{
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hdr.ipv4.setValid();
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hdr.tcp.src_port = src_port;
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hdr.tcp.dst_port = dst_port;
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nat64_generic(src_addr, dst_addr);
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}
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action nat46_tcp_session_translate(
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ipv6_addr_t src_addr,
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bit<16> src_port,
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ipv6_addr_t dst_addr,
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bit<16> dst_port)
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{
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hdr.ipv6.setValid();
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hdr.tcp.src_port = src_port;
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hdr.tcp.dst_port = dst_port;
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nat46_generic(src_addr, dst_addr);
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}
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/* We are in the right range, need to create a session entry */
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action nat64_tcp_session_create()
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{
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controller_reply(TASK_NAT64_TCP_SESSION);
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}
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/* Used for detecting traffic that should have a session */
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table nat64_session {
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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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controller_debug_table_id;
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NoAction;
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}
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size = NAT64_TABLE_SIZE;
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default_action = controller_debug_table_id(TABLE_NAT64_SESSION);
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}
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table nat64_tcp_session {
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key = {
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hdr.ipv6.src_addr: exact;
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hdr.ipv6.dst_addr: exact;
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hdr.tcp.src_port: exact;
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hdr.tcp.dst_port: exact;
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}
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actions = {
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controller_debug_table_id;
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nat64_tcp_session_create;
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nat64_tcp_session_translate;
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NoAction;
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}
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size = NAT64_TABLE_SIZE;
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default_action = nat64_tcp_session_create;
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}
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table nat46_tcp_session {
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key = {
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hdr.ipv6.src_addr: exact;
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hdr.ipv6.dst_addr: exact;
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hdr.tcp.src_port: exact;
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hdr.tcp.dst_port: exact;
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}
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actions = {
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controller_debug_table_id;
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nat46_tcp_session_translate;
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NoAction;
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}
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size = NAT64_TABLE_SIZE;
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//default_action = controller_debug_table_id(TABLE_NAT64_TCP);
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default_action = NoAction;
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}
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/********************** ICMP6 + NDP + ICMP ***********************************/
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/* old/unused action -- is it??*/
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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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}
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action icmp6_neighbor_solicitation(ipv6_addr_t addr, mac_addr_t mac_addr) {
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/* egress = ingress */
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standard_metadata.egress_spec = standard_metadata.ingress_port;
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/* 1. IPv6 changes */
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|
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hdr.ipv6.dst_addr = hdr.ipv6.src_addr;
|
||
|
|
hdr.ipv6.src_addr = addr;
|
||
|
|
|
||
|
|
/* 2. ICMP6 changes */
|
||
|
|
hdr.icmp6.type = ICMP6_NA;
|
||
|
|
hdr.icmp6.code = 0;
|
||
|
|
hdr.icmp6.checksum = 42; // checksum is calculated in deparser - marking with 42 to see whether it is calculated
|
||
|
|
|
||
|
|
/* 3. icmp6/neighbor advertisement: values taken from real world answers */
|
||
|
|
hdr.icmp6_na_ns.router = 0;
|
||
|
|
hdr.icmp6_na_ns.solicitated = 1;
|
||
|
|
hdr.icmp6_na_ns.override = 1;
|
||
|
|
hdr.icmp6_na_ns.reserved = 0;
|
||
|
|
hdr.icmp6_na_ns.target_addr = addr;
|
||
|
|
|
||
|
|
/* 4. Link layer options */
|
||
|
|
hdr.icmp6_option_link_layer_addr.type = ICMP6_NDP_OPT_TARGET_LL;
|
||
|
|
hdr.icmp6_option_link_layer_addr.ll_length = 1; /* 1* 64 bit */
|
||
|
|
hdr.icmp6_option_link_layer_addr.mac_addr = mac_addr;
|
||
|
|
|
||
|
|
/* 5. Checksum trigger/info */
|
||
|
|
meta.chk_icmp6_na_ns = 1;
|
||
|
|
meta.cast_length = (bit<32>) hdr.ipv6.payload_length;
|
||
|
|
}
|
||
|
|
|
||
|
|
action icmp6_echo_reply() {
|
||
|
|
mac_addr_t mac_tmp = hdr.ethernet.dst_addr;
|
||
|
|
hdr.ethernet.dst_addr = hdr.ethernet.src_addr;
|
||
|
|
hdr.ethernet.src_addr = mac_tmp;
|
||
|
|
|
||
|
|
ipv6_addr_t addr_tmp = hdr.ipv6.dst_addr;
|
||
|
|
hdr.ipv6.dst_addr = hdr.ipv6.src_addr;
|
||
|
|
hdr.ipv6.src_addr = addr_tmp;
|
||
|
|
|
||
|
|
hdr.icmp6.type = ICMP6_ECHO_REPLY;
|
||
|
|
|
||
|
|
meta.chk_icmp6 = 1;
|
||
|
|
|
||
|
|
meta.cast_length = (bit<32>) hdr.ipv6.payload_length;
|
||
|
|
}
|
||
|
|
|
||
|
|
table icmp6 {
|
||
|
|
key = {
|
||
|
|
hdr.ipv6.dst_addr: lpm;
|
||
|
|
hdr.icmp6.type: exact;
|
||
|
|
}
|
||
|
|
actions = {
|
||
|
|
controller_debug;
|
||
|
|
icmp6_neighbor_solicitation;
|
||
|
|
icmp6_echo_reply;
|
||
|
|
controller_debug_table_id;
|
||
|
|
NoAction;
|
||
|
|
}
|
||
|
|
size = ICMP6_TABLE_SIZE;
|
||
|
|
default_action = controller_debug_table_id(TABLE_ICMP6);
|
||
|
|
}
|
||
|
|
|
||
|
|
action icmp_echo_reply() {
|
||
|
|
mac_addr_t mac_tmp = hdr.ethernet.dst_addr;
|
||
|
|
ipv4_addr_t ipv4_tmp = hdr.ipv4.src_addr;
|
||
|
|
|
||
|
|
/* swap ethernet addresses */
|
||
|
|
hdr.ethernet.dst_addr = hdr.ethernet.src_addr;
|
||
|
|
hdr.ethernet.src_addr = mac_tmp;
|
||
|
|
|
||
|
|
/* swap ipv4 addresses */
|
||
|
|
hdr.ipv4.src_addr = hdr.ipv4.dst_addr;
|
||
|
|
hdr.ipv4.dst_addr = ipv4_tmp;
|
||
|
|
|
||
|
|
/* set correct type */
|
||
|
|
hdr.icmp.type = ICMP_ECHO_REPLY;
|
||
|
|
|
||
|
|
meta.chk_icmp = 1;
|
||
|
|
}
|
||
|
|
|
||
|
|
table icmp {
|
||
|
|
key = {
|
||
|
|
hdr.ipv4.dst_addr: lpm;
|
||
|
|
hdr.icmp.type: exact;
|
||
|
|
}
|
||
|
|
actions = {
|
||
|
|
icmp_echo_reply;
|
||
|
|
controller_debug_table_id;
|
||
|
|
NoAction;
|
||
|
|
}
|
||
|
|
size = ICMP_TABLE_SIZE;
|
||
|
|
// default_action = controller_debug_table_id(TABLE_ICMP);
|
||
|
|
default_action = NoAction; /* do not clone on miss */
|
||
|
|
}
|
||
|
|
|
||
|
|
/********************** ARP ***********************************/
|
||
|
|
|
||
|
|
action arp_reply(mac_addr_t mac_addr) {
|
||
|
|
/* swap */
|
||
|
|
ipv4_addr_t ipv4_src = hdr.arp.dst_ipv4_addr;
|
||
|
|
ipv4_addr_t ipv4_dst = hdr.arp.src_ipv4_addr;
|
||
|
|
|
||
|
|
/* swap/add */
|
||
|
|
mac_addr_t mac_src = mac_addr;
|
||
|
|
mac_addr_t mac_dst = hdr.arp.src_mac_addr;
|
||
|
|
|
||
|
|
/* fill the ethernet header */
|
||
|
|
hdr.ethernet.dst_addr = mac_dst;
|
||
|
|
hdr.ethernet.src_addr = mac_src;
|
||
|
|
|
||
|
|
/* fill the arp header */
|
||
|
|
hdr.arp.dst_mac_addr = mac_dst;
|
||
|
|
hdr.arp.src_mac_addr = mac_src;
|
||
|
|
|
||
|
|
/* swapping */
|
||
|
|
hdr.arp.dst_ipv4_addr = ipv4_dst;
|
||
|
|
hdr.arp.src_ipv4_addr = ipv4_src;
|
||
|
|
|
||
|
|
hdr.arp.opcode = ARP_REPLY;
|
||
|
|
}
|
||
|
|
|
||
|
|
table v4_arp {
|
||
|
|
key = {
|
||
|
|
hdr.ethernet.dst_addr: exact;
|
||
|
|
hdr.arp.opcode: exact;
|
||
|
|
hdr.arp.dst_ipv4_addr: lpm;
|
||
|
|
}
|
||
|
|
actions = {
|
||
|
|
controller_debug_table_id;
|
||
|
|
arp_reply;
|
||
|
|
NoAction;
|
||
|
|
}
|
||
|
|
size = ICMP6_TABLE_SIZE;
|
||
|
|
default_action = controller_debug_table_id(TABLE_ARP);
|
||
|
|
}
|
||
|
|
|
||
|
|
table v4_arp_egress {
|
||
|
|
key = {
|
||
|
|
hdr.arp.dst_ipv4_addr: lpm;
|
||
|
|
}
|
||
|
|
actions = {
|
||
|
|
controller_debug_table_id;
|
||
|
|
set_egress_port;
|
||
|
|
NoAction;
|
||
|
|
}
|
||
|
|
size = ICMP6_TABLE_SIZE;
|
||
|
|
default_action = controller_debug_table_id(TABLE_ARP_EGRESS);
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/********************** ROUTING (egress definiton) TABLES ***********************************/
|
||
|
|
|
||
|
|
table v6_networks {
|
||
|
|
key = {
|
||
|
|
hdr.ipv6.dst_addr: lpm;
|
||
|
|
}
|
||
|
|
actions = {
|
||
|
|
set_egress_port;
|
||
|
|
set_egress_port_and_mac;
|
||
|
|
controller_debug;
|
||
|
|
controller_reply;
|
||
|
|
controller_debug_table_id;
|
||
|
|
NoAction;
|
||
|
|
}
|
||
|
|
size = ROUTING_TABLE_SIZE;
|
||
|
|
|
||
|
|
default_action = controller_debug_table_id(TABLE_V6_NETWORKS);
|
||
|
|
}
|
||
|
|
|
||
|
|
table v4_networks {
|
||
|
|
key = {
|
||
|
|
hdr.ipv4.dst_addr: lpm;
|
||
|
|
}
|
||
|
|
actions = {
|
||
|
|
set_egress_port;
|
||
|
|
set_egress_port_and_mac;
|
||
|
|
controller_debug;
|
||
|
|
controller_debug_table_id;
|
||
|
|
NoAction;
|
||
|
|
}
|
||
|
|
size = ROUTING_TABLE_SIZE;
|
||
|
|
default_action = controller_debug_table_id(TABLE_V4_NETWORKS);
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
action swap_eth_addresses() {
|
||
|
|
EthAddr_t temp = p.ethernet.dstAddr;
|
||
|
|
p.ethernet.dstAddr = p.ethernet.srcAddr;
|
||
|
|
p.ethernet.srcAddr = temp;
|
||
|
|
|
||
|
|
/* set egress port */
|
||
|
|
sume_metadata.dst_port = sume_metadata.src_port;
|
||
|
|
}
|
||
|
|
|
||
|
|
action send_to_port1() {
|
||
|
|
sume_metadata.dst_port = 1;
|
||
|
|
}
|
||
|
|
|
||
|
|
action send_to_all_ports() {
|
||
|
|
/* Taken from commands.txt of the "int" project:
|
||
|
|
table_cam_add_entry forward set_output_port 0xffffffffffff => 0b01010101
|
||
|
|
|
||
|
|
python convert:
|
||
|
|
>>> 0b01010101
|
||
|
|
85
|
||
|
|
|
||
|
|
*/
|
||
|
|
sume_metadata.dst_port = 85;
|
||
|
|
}
|
||
|
|
|
||
|
|
action do_nothing() {
|
||
|
|
EthAddr_t temp = p.ethernet.dstAddr;
|
||
|
|
}
|
||
|
|
|
||
|
|
table lookup_table {
|
||
|
|
key = {
|
||
|
|
p.ethernet.dstAddr: exact;
|
||
|
|
}
|
||
|
|
|
||
|
|
actions = {
|
||
|
|
swap_eth_addresses;
|
||
|
|
do_nothing;
|
||
|
|
send_to_port1;
|
||
|
|
send_to_all_ports;
|
||
|
|
}
|
||
|
|
size = 64;
|
||
|
|
// default_action = swap_eth_addresses; // test_mirror(): in gen_testdata.py
|
||
|
|
default_action = send_to_port1; // test_port1()
|
||
|
|
// default_action = send_to_all_ports; // test_allports():
|
||
|
|
}
|
||
|
|
|
||
|
|
apply {
|
||
|
|
lookup_table.apply();
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/********************************************************************************
|
||
|
|
* Deparser
|
||
|
|
*/
|
||
|
|
|
||
|
|
@Xilinx_MaxPacketRegion(1024)
|
||
|
|
control TopDeparser(packet_out b,
|
||
|
|
in Parsed_packet p,
|
||
|
|
in user_metadata_t user_metadata,
|
||
|
|
inout digest_data_t digest_data,
|
||
|
|
inout sume_metadata_t sume_metadata) {
|
||
|
|
apply {
|
||
|
|
b.emit(p.ethernet);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/********************************************************************************
|
||
|
|
* Switch
|
||
|
|
*/
|
||
|
|
|
||
|
|
SimpleSumeSwitch(
|
||
|
|
TopParser(),
|
||
|
|
TopPipe(),
|
||
|
|
TopDeparser()
|
||
|
|
) main;
|