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tc_may_override annotation implementation
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,134 @@ | ||
| #include <core.p4> | ||
| #include <tc/pna.p4> | ||
|
|
||
| typedef bit<48> EthernetAddress; | ||
|
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| header ethernet_t { | ||
| EthernetAddress dstAddr; | ||
| EthernetAddress srcAddr; | ||
| bit<16> etherType; | ||
| } | ||
|
|
||
| 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; | ||
| @tc_type ("ipv4") bit<32> srcAddr; | ||
| @tc_type ("ipv4") bit<32> dstAddr; | ||
| } | ||
|
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| ////////////////////////////////////////////////////////////////////// | ||
| // Struct types for holding user-defined collections of headers and | ||
| // metadata in the P4 developer's program. | ||
| // | ||
| // Note: The names of these struct types are completely up to the P4 | ||
| // developer, as are their member fields, with the only restriction | ||
| // being that the structs intended to contain headers should only | ||
| // contain members whose types are header, header stack, or | ||
| // header_union. | ||
| ////////////////////////////////////////////////////////////////////// | ||
|
|
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| struct main_metadata_t { | ||
| // empty for this skeleton | ||
| } | ||
|
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| // User-defined struct containing all of those headers parsed in the | ||
| // main parser. | ||
| struct headers_t { | ||
| ethernet_t ethernet; | ||
| ipv4_t ipv4; | ||
| } | ||
|
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||
| parser MainParserImpl( | ||
| packet_in pkt, | ||
| out headers_t hdr, | ||
| inout main_metadata_t main_meta, | ||
| in pna_main_parser_input_metadata_t istd) | ||
| { | ||
| state start { | ||
| pkt.extract(hdr.ethernet); | ||
| transition select(hdr.ethernet.etherType) { | ||
| 0x0800 : parse_ipv4; | ||
| default : accept; | ||
| } | ||
| } | ||
| state parse_ipv4 { | ||
| pkt.extract(hdr.ipv4); | ||
| transition accept; | ||
| } | ||
| } | ||
|
|
||
| control MainControlImpl( | ||
| inout headers_t hdr, // from main parser | ||
| inout main_metadata_t user_meta, // from main parser, to "next block" | ||
| in pna_main_input_metadata_t istd, | ||
| inout pna_main_output_metadata_t ostd) | ||
| { | ||
| action next_hop(PortId_t vport) { | ||
| send_to_port(vport); | ||
| } | ||
| action default_route_drop() { | ||
| drop_packet(); | ||
| } | ||
| action drop() { | ||
| drop_packet(); | ||
| } | ||
|
|
||
| table ipv4_tbl_1 { | ||
| key = { | ||
| hdr.ipv4.dstAddr : exact; | ||
| istd.input_port : exact; | ||
| } | ||
| actions = { | ||
| next_hop; | ||
| default_route_drop; | ||
| } | ||
| @tc_may_override default_action = next_hop((PortId_t)123); | ||
| } | ||
| table ipv4_tbl_2 { | ||
| key = { | ||
| hdr.ipv4.dstAddr : exact; | ||
| hdr.ipv4.srcAddr : exact; | ||
| hdr.ipv4.protocol : exact; | ||
| } | ||
| actions = { | ||
| next_hop; | ||
| drop; | ||
| } | ||
| default_action = drop; | ||
| } | ||
|
|
||
| apply { | ||
| if (hdr.ipv4.isValid()) { | ||
| ipv4_tbl_1.apply(); | ||
| ipv4_tbl_2.apply(); | ||
| } | ||
| } | ||
| } | ||
|
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||
| control MainDeparserImpl( | ||
| packet_out pkt, | ||
| inout headers_t hdr, // from main control | ||
| in main_metadata_t user_meta, // from main control | ||
| in pna_main_output_metadata_t ostd) | ||
| { | ||
| apply { | ||
| pkt.emit(hdr.ethernet); | ||
| pkt.emit(hdr.ipv4); | ||
| } | ||
| } | ||
|
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| // BEGIN:Package_Instantiation_Example | ||
| PNA_NIC( | ||
| MainParserImpl(), | ||
| MainControlImpl(), | ||
| MainDeparserImpl() | ||
| ) main; | ||
| // END:Package_Instantiation_Example |
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testdata/p4tc_samples_outputs/tc_may_override_example_01.json
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,113 @@ | ||
| { | ||
| "schema_version" : "1.0.0", | ||
| "pipeline_name" : "tc_may_override_example_01", | ||
| "tables" : [ | ||
| { | ||
| "name" : "MainControlImpl/ipv4_tbl_1", | ||
| "id" : 1, | ||
| "tentries" : 2048, | ||
| "nummask" : 8, | ||
| "keysize" : 64, | ||
| "keyfields" : [ | ||
| { | ||
| "id" : 1, | ||
| "name" : "hdr.ipv4.dstAddr", | ||
| "type" : "bit32", | ||
| "match_type" : "exact", | ||
| "bitwidth" : 32 | ||
| }, | ||
| { | ||
| "id" : 2, | ||
| "name" : "istd.input_port", | ||
| "type" : "bit32", | ||
| "match_type" : "exact", | ||
| "bitwidth" : 32 | ||
| } | ||
| ], | ||
| "actions" : [ | ||
| { | ||
| "id" : 1, | ||
| "name" : "MainControlImpl/next_hop", | ||
| "action_scope" : "TableAndDefault", | ||
| "annotations" : [], | ||
| "params" : [ | ||
| { | ||
| "id" : 1, | ||
| "name" : "vport", | ||
| "type" : "bit32", | ||
| "bitwidth" : 32 | ||
| } | ||
| ], | ||
| "default_hit_action" : false, | ||
| "default_miss_action" : true | ||
| }, | ||
| { | ||
| "id" : 2, | ||
| "name" : "MainControlImpl/default_route_drop", | ||
| "action_scope" : "TableAndDefault", | ||
| "annotations" : [], | ||
| "params" : [], | ||
| "default_hit_action" : false, | ||
| "default_miss_action" : false | ||
| } | ||
| ] | ||
| }, | ||
| { | ||
| "name" : "MainControlImpl/ipv4_tbl_2", | ||
| "id" : 2, | ||
| "tentries" : 2048, | ||
| "nummask" : 8, | ||
| "keysize" : 72, | ||
| "keyfields" : [ | ||
| { | ||
| "id" : 1, | ||
| "name" : "hdr.ipv4.dstAddr", | ||
| "type" : "bit32", | ||
| "match_type" : "exact", | ||
| "bitwidth" : 32 | ||
| }, | ||
| { | ||
| "id" : 2, | ||
| "name" : "hdr.ipv4.srcAddr", | ||
| "type" : "bit32", | ||
| "match_type" : "exact", | ||
| "bitwidth" : 32 | ||
| }, | ||
| { | ||
| "id" : 3, | ||
| "name" : "hdr.ipv4.protocol", | ||
| "type" : "bit8", | ||
| "match_type" : "exact", | ||
| "bitwidth" : 8 | ||
| } | ||
| ], | ||
| "actions" : [ | ||
| { | ||
| "id" : 1, | ||
| "name" : "MainControlImpl/next_hop", | ||
| "action_scope" : "TableAndDefault", | ||
| "annotations" : [], | ||
| "params" : [ | ||
| { | ||
| "id" : 1, | ||
| "name" : "vport", | ||
| "type" : "bit32", | ||
| "bitwidth" : 32 | ||
| } | ||
| ], | ||
| "default_hit_action" : false, | ||
| "default_miss_action" : false | ||
| }, | ||
| { | ||
| "id" : 3, | ||
| "name" : "MainControlImpl/drop", | ||
| "action_scope" : "TableAndDefault", | ||
| "annotations" : [], | ||
| "params" : [], | ||
| "default_hit_action" : false, | ||
| "default_miss_action" : true | ||
| } | ||
| ] | ||
| } | ||
| ] | ||
| } |
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