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rm spurious tbls #8

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merged 1 commit into from
Feb 25, 2021
Merged

rm spurious tbls #8

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36 changes: 7 additions & 29 deletions p4/p4_src/kary.p4
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Original file line number Diff line number Diff line change
Expand Up @@ -146,7 +146,7 @@ control MyIngress(inout headers hdr,
mark_to_drop(standard_metadata);
}

//forward all packets to the specified port
//forward packets to the specified port
action set_egr(egressSpec_t port) {
standard_metadata.egress_spec = port;
}
Expand Down Expand Up @@ -176,23 +176,6 @@ control MyIngress(inout headers hdr,
meta.flowkey2[39:32] = hdr.ipv4.protocol;
}

table get_flowkey_tcp {
actions = {
copy_key_tcp;
}
default_action = copy_key_tcp();

}


table get_flowkey_udp {
actions = {
copy_key_udp;
}
default_action = copy_key_udp();

}

table forward {
key = {
standard_metadata.ingress_port: exact;
Expand All @@ -205,30 +188,25 @@ control MyIngress(inout headers hdr,
default_action = drop();
}

//calculate hash values
table hash_index {
actions = {
cal_hash;
}
default_action = cal_hash();
}


apply {
if (hdr.ipv4.isValid()) {
//first pass
if (meta.repass == 0) {
forward.apply();
//construct flowkey information

// TODO - this can be generalized in the parser stage through the use of some metadata, I will explain you this trick soon
// so we can avoid the conditional checks and only call one action here
if (hdr.ipv4.protocol == IP_PROTOCOLS_TCP) {
get_flowkey_tcp.apply();
copy_key_tcp();
}
if (hdr.ipv4.protocol == IP_PROTOCOLS_UDP) {
get_flowkey_udp.apply();
copy_key_udp();
}

//calculate hash value
hash_index.apply();
cal_hash();

//check if new packet is inside current epoch or in the next one
epoch.read(meta.epoch,0);
Expand Down