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Improve dayz mod parsing with more random reverse engineering guesses

This commit is contained in:
Michael Morrison 2022-02-05 19:24:15 -06:00
parent 685a955233
commit b11eac277d
2 changed files with 28 additions and 10 deletions
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4
lib/reader.js
View File

@ -28,6 +28,10 @@ class Reader {
this.i = 0;
}
setOffset(offset) {
this.i = offset;
}
offset() {
return this.i;
}

34
protocols/valve.js
View File

@ -1,6 +1,7 @@
const Bzip2 = require('compressjs').Bzip2,
Core = require('./core'),
Results = require('../lib/Results');
const Bzip2 = require('compressjs').Bzip2;
const Core = require('./core');
const Results = require('../lib/Results');
const Reader = require('../lib/reader');
const AppId = {
Squad: 393380,
@ -318,26 +319,39 @@ class Valve extends Core {
this.logger.debug("overflow " + overflow);
this.logger.debug("dlc1 " + dlc1);
this.logger.debug("dlc2 " + dlc2);
if (dlc1) {
const unknown = this.readDayzUint(reader, 4); // ?
this.logger.debug("unknown " + unknown);
}
if (dlc2) {
const unknown = this.readDayzUint(reader, 4); // ?
this.logger.debug("unknown " + unknown);
}
const mods = [];
mods.push(...this.readDayzModsSection(reader, true));
mods.push(...this.readDayzModsSection(reader, false));
this.logger.debug("dayz buffer rest:", reader.rest());
return mods;
}
readDayzModsSection(reader, withHeader) {
readDayzModsSection(/** Reader */ reader, withHeader) {
const out = [];
const count = this.readDayzByte(reader);
this.logger.debug("dayz mod section withHeader:" + withHeader + " count:" + count);
for(let i = 0; i < count; i++) {
if (reader.done()) break;
const mod = {};
if (withHeader) {
const unknown = this.readDayzUint(reader, 4); // mod hash?
if (i !== count - 1) {
// For some reason this is 4 on all of them, but doesn't exist on the last one?
const flag = this.readDayzByte(reader);
//mod.flag = flag;
}
mod.unknown = this.readDayzUint(reader, 4); // ?
// For some reason this is 4 on all of them, but doesn't exist on the last one? but only sometimes?
const offset = reader.offset();
const flag = this.readDayzByte(reader);
if (flag !== 4) reader.setOffset(offset);
mod.workshopId = this.readDayzUint(reader, 4);
}
mod.title = this.readDayzString(reader);
this.logger.debug(mod);
out.push(mod);
}
return out;