test: update and harden http2-reset-flood

* use new maxSessionInvalidFrames to lower the needed frames
* slow down requests to generate less redundant after-session-close
requests
PR-URL: #30534Fixes: #30505
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: David Carlier <devnexen@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>

Author: lundibundi

test/parallel/test-http2-reset-flood.js

@@ -13,7 +13,7 @@ const { Worker, parentPort } = require('worker_threads');
 // the two event loops intermixing, as we are writing in a busy loop here.
 
 if(process.env.HAS_STARTED_WORKER){
-constserver=http2.createServer();
+constserver=http2.createServer({maxSessionInvalidFrames: 100});
 server.on('stream',(stream)=>{
 stream.respond({
 'content-type': 'text/plain',
@@ -59,16 +59,20 @@ const worker = new Worker(__filename).on('message', common.mustCall((port) => {
 });
 
 letgotError=false;
+letstreamId=1;
 
 functionwriteRequests(){
-for(leti=1;!gotError;i+=2){
+for(leti=1;i<10&&!gotError;i++){
 h2header[3]=1;// HEADERS
 h2header[4]=0x5;// END_HEADERS|END_STREAM
 h2header.writeIntBE(1,0,3);// Length: 1
-h2header.writeIntBE(i,5,4);// Stream ID
+h2header.writeIntBE(streamId,5,4);// Stream ID
+streamId+=2;
 // 0x88 = :status: 200
 conn.write(Buffer.concat([h2header,Buffer.from([0x88])]));
 }
+if(!gotError)
+setImmediate(writeRequests);
 }
 
 conn.once('error',common.mustCall(()=>{