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completely rework the parsing structure because I now realize how frames work

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This commit is contained in:
Joel Wetzell
2023-09-10 23:40:06 -05:00
parent 7a1366303f
commit 17224d9319
9 changed files with 261 additions and 132 deletions
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parsers/data/index.js
+4 -26
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@@ -1,7 +1,6 @@
const { PSN_PACKET_HEADER_PARSER } = require('../common');
const Parser = require('binary-parser').Parser;
const PSN_DATA_TRACKER_FIELD_PARSER = new Parser()
const DataTrackerFieldParser = new Parser()
.uint16le('id')
.uint16le('data_len', {
formatter: (item) => {
@@ -48,30 +47,9 @@ const PSN_DATA_TRACKER_PARSER = new Parser()
length: 'data_len',
});
const PSN_DATA_TRACKER_LIST_PARSER = new Parser()
.uint16le('id')
.uint16le('data_len', {
formatter: (item) => {
const binary = item.toString(2).padStart(16, '0');
return Number.parseInt(binary.substring(1), 2);
},
})
.seek(-2)
.uint16le('has_subchunks', {
formatter: (item) => {
const binary = item.toString(2).padStart(16, '0');
return binary.charAt(0) === '1';
},
})
.array('trackers', { type: PSN_DATA_TRACKER_PARSER, lengthInBytes: 'data_len' });
const PSN_DATA_CHUNK_DATA_PARSER = new Parser()
.nest('packet_header', { type: PSN_PACKET_HEADER_PARSER })
.nest('tracker_list', { type: PSN_DATA_TRACKER_LIST_PARSER });
const DataTrackerListParser = new Parser().array('trackers', { type: PSN_DATA_TRACKER_PARSER, readUntil: 'eof' });
module.exports = {
PSN_DATA_CHUNK_DATA_PARSER,
PSN_DATA_TRACKER_FIELD_PARSER,
PSN_DATA_TRACKER_LIST_PARSER,
PSN_DATA_TRACKER_PARSER,
DataTrackerFieldParser,
DataTrackerListParser,
};