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+notes; Try shifting the cast into the parser

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Nico Schottelius 2019-03-06 13:12:06 +01:00
commit 0ca0b94b1c
4 changed files with 22 additions and 7 deletions
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4
p4src/checksums.p4
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@ -21,13 +21,11 @@ control MyVerifyChecksum(inout headers hdr, inout metadata meta) {
control MyComputeChecksum(inout headers hdr, inout metadata meta) {
apply {
bit<32> icmp6_len = (bit<32>) hdr.ipv6.payload_length;
update_checksum_with_payload(meta.calc_icmp6_checksum,
{
hdr.ipv6.src_addr, /* 128 */
hdr.ipv6.dst_addr, /* 128 */
icmp6_len, /* 32 */
meta.cast_length, /* 32 */
24w0, /* 24 0's */
PROTO_ICMP6 /* 8 */
},

1
p4src/headers.p4
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@ -133,6 +133,7 @@ struct metadata {
port_t ingress_port;
task_t task;
bit<16> tcp_length;
bit<32> cast_length;
bool calc_icmp6_checksum;
}

1
p4src/parsers.p4
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@ -37,6 +37,7 @@ parser MyParser(packet_in packet,
state ipv6 {
packet.extract(hdr.ipv6);
meta.tcp_length = hdr.ipv6.payload_length;
meta.cast_length = (<bit32>) hdr.ipv6.payload_length;
transition select(hdr.ipv6.next_header){
PROTO_TCP: tcp;