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Introduce the SKB metadata extern (#4916)
Signed-off-by: Mouse <mouse@mojatatu.com> Co-authored-by: Mouse <mouse@mojatatu.com>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,142 @@ | ||
| #include <core.p4> | ||
| #include <tc/pna.p4> | ||
|
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||
| /****** G L O B A L I N G R E S S M E T A D A T A *********/ | ||
|
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| struct my_ingress_metadata_t { | ||
| } | ||
|
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| struct empty_metadata_t { | ||
| } | ||
|
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| /* -*- P4_16 -*- */ | ||
|
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| /* | ||
| * CONST VALUES FOR TYPES | ||
| */ | ||
| const bit<8> IP_PROTO_TCP = 0x06; | ||
| const bit<16> ETHERTYPE_IPV4 = 0x0800; | ||
|
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| /* | ||
| * Standard ethernet header | ||
| */ | ||
| header ethernet_t { | ||
| bit<48> dstAddr; | ||
| bit<48> srcAddr; | ||
| bit<16> etherType; | ||
| } | ||
|
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||
| 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; | ||
| bit<32> srcAddr; | ||
| bit<32> dstAddr; | ||
| } | ||
|
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| struct my_ingress_headers_t { | ||
| ethernet_t ethernet; | ||
| ipv4_t ipv4; | ||
| } | ||
|
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||
| /*********************** P A R S E R **************************/ | ||
| parser Ingress_Parser( | ||
| packet_in pkt, | ||
| out my_ingress_headers_t hdr, | ||
| inout my_ingress_metadata_t meta, | ||
| in pna_main_parser_input_metadata_t istd) | ||
| { | ||
|
|
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| state start { | ||
| transition parse_ethernet; | ||
| } | ||
|
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| state parse_ethernet { | ||
| pkt.extract(hdr.ethernet); | ||
| transition select(hdr.ethernet.etherType) { | ||
| ETHERTYPE_IPV4: parse_ipv4; | ||
| default: reject; | ||
| } | ||
| } | ||
| state parse_ipv4 { | ||
| pkt.extract(hdr.ipv4); | ||
| transition select(hdr.ipv4.protocol) { | ||
| IP_PROTO_TCP : accept; | ||
| default: reject; | ||
| } | ||
| } | ||
| } | ||
|
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| #define L3_TABLE_SIZE 2048 | ||
|
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| /***************** M A T C H - A C T I O N *********************/ | ||
|
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| control ingress( | ||
| inout my_ingress_headers_t hdr, | ||
| inout my_ingress_metadata_t meta, | ||
| in pna_main_input_metadata_t istd, | ||
| inout pna_main_output_metadata_t ostd | ||
| ) | ||
| { | ||
| action send_nh(@tc_type("dev") PortId_t port, @tc_type("macaddr") bit<48> srcMac, @tc_type("macaddr") bit<48> dstMac) { | ||
|
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| skb_get_meta(); | ||
| skb_set_tc_classid(skb_get_tc_classid() + 1); | ||
| skb_set_tc_index(skb_get_tc_index() + 1); | ||
| skb_set_meta(); | ||
| hdr.ethernet.srcAddr = (bit<48>)skb_get_tstamp() ^ srcMac; | ||
| hdr.ethernet.dstAddr = dstMac; | ||
| send_to_port(port); | ||
| } | ||
|
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||
| action drop() { | ||
| drop_packet(); | ||
| } | ||
|
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| table nh_table { | ||
| key = { | ||
| hdr.ipv4.dstAddr : exact @tc_type("ipv4") @name("dstAddr"); | ||
| } | ||
| actions = { | ||
| send_nh; | ||
| drop; | ||
| } | ||
| size = L3_TABLE_SIZE; | ||
| const default_action = drop; | ||
| } | ||
|
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||
| apply { | ||
| if (hdr.ipv4.isValid() && hdr.ipv4.protocol == IP_PROTO_TCP) { | ||
| nh_table.apply(); | ||
| } | ||
| } | ||
| } | ||
|
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||
| /********************* D E P A R S E R ************************/ | ||
|
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| control Ingress_Deparser( | ||
| packet_out pkt, | ||
| inout my_ingress_headers_t hdr, | ||
| in my_ingress_metadata_t meta, | ||
| in pna_main_output_metadata_t ostd) | ||
| { | ||
| apply { | ||
| pkt.emit(hdr.ethernet); | ||
| pkt.emit(hdr.ipv4); | ||
| } | ||
| } | ||
|
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| /************ F I N A L P A C K A G E ******************************/ | ||
|
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||
| PNA_NIC( | ||
| Ingress_Parser(), | ||
| ingress(), | ||
| Ingress_Deparser() | ||
| ) main; |
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