Union/UnionPatcher
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Added regex matching to find index of LBP server URLs (#27)

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* Use regex to discover existing server urls

- Supports LBP PSP and PS3
- Hardcoded length limit, will fix soonTM

* Get maximum length for server URL from EBOOT

* Potential fix for LBP3
- Matches all but NULL instead of just all

* Potentially extend maximum length
Thanks slendy

* Leave a NULL character of padding
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Dagg 2022-09-13 15:15:04 -07:00 • committed by GitHub
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1 changed files with 12 additions and 33 deletions
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UnionPatcher/Patcher.cs
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@ -1,37 +1,11 @@
using System; using System;
using System.IO; using System.IO;
using System.Text; using System.Text;
using System.Text.RegularExpressions;
namespace LBPUnion.UnionPatcher; namespace LBPUnion.UnionPatcher;
public static class Patcher { public static class Patcher {
private static readonly string[] toBePatched = {
// Normal LittleBigPlanet gameserver URLs
"https://littlebigplanetps3.online.scee.com:10061/LITTLEBIGPLANETPS3_XML",
"http://littlebigplanetps3.online.scee.com:10060/LITTLEBIGPLANETPS3_XML",
// LittleBigPlanet 3 Presence URLs
"http://live.littlebigplanetps3.online.scee.com:10060/LITTLEBIGPLANETPS3_XML",
"http://presence.littlebigplanetps3.online.scee.com:10060/LITTLEBIGPLANETPS3_XML",
#region Spinoff URLs
// LittleBigPlanet PSP URLs
"http://lbppsp.online.scee.com:10060/LITTLEBIGPLANETPSP_XML",
"https://lbppsp.online.scee.com:10061/LITTLEBIGPLANETPSP_XML",
// LittleBigPlanet Vita URLs
"http://lbpvita.online.scee.com:10060/LITTLEBIGPLANETPS3_XML",
"https://lbpvita.online.scee.com:10061/LITTLEBIGPLANETPS3_XML",
#endregion
#region Beta URLS
// LittleBigPlanet 2 Beta URLs
"http://lbp2ps3-beta.online.scee.com:10060/LITTLEBIGPLANETPS3_XML",
"https://lbp2ps3-beta.online.scee.com:10061/LITTLEBIGPLANETPS3_XML",
// LittleBigPlanet (3?) Beta URLs
"http://littlebigplanetps3-beta.online.scee.com:10060/LITTLEBIGPLANETPS3_XML",
"https://littlebigplanetps3-beta.online.scee.com:10061/LITTLEBIGPLANETPS3_XML",
// LittleBigPlanet Vita Beta URLs
"http://lbpvita-beta.online.scee.com:10060/LITTLEBIGPLANETPS3_XML",
"https://lbpvita-beta.online.scee.com:10061/LITTLEBIGPLANETPS3_XML",
#endregion
};
public static void PatchFile(string fileName, Uri serverUrl, string outputFileName) { public static void PatchFile(string fileName, Uri serverUrl, string outputFileName) {
PatchFile(fileName, serverUrl.ToString(), outputFileName); PatchFile(fileName, serverUrl.ToString(), outputFileName);
@ -72,13 +46,18 @@ public static class Patcher {
byte[] serverUrlAsBytes = Encoding.ASCII.GetBytes(serverUrl); byte[] serverUrlAsBytes = Encoding.ASCII.GetBytes(serverUrl);
bool wroteUrl = false; bool wroteUrl = false;
foreach(string url in toBePatched) {
if(serverUrl.Length > url.Length) { // Find a string including http or https and LITTLEBIGPLANETPS3_XML or LITTLEBIGPLANETPSP_XML,
throw new ArgumentOutOfRangeException(nameof(serverUrl), $"Server URL ({serverUrl.Length} characters long) is above maximum length {url.Length}"); // then match any additional NULL characters to dynamically gague the maximum length on a per-title basis
// without a hardcoded array of known server URLs
MatchCollection urls = Regex.Matches(dataAsString, "http?[^\x00]*?LITTLEBIGPLANETPS(3|P)_XML\x00*");
foreach(Match urlMatch in urls) {
string url = urlMatch.Value;
if(serverUrl.Length > url.Length - 1) {
throw new ArgumentOutOfRangeException(nameof(serverUrl), $"Server URL ({serverUrl.Length} characters long) is above maximum length {url.Length - 1}");
} }
int offset = urlMatch.Index;
int offset = dataAsString.IndexOf(url, StringComparison.Ordinal);
if(offset < 1) continue;
writer.BaseStream.Position = offset; writer.BaseStream.Position = offset;
for(int i = 0; i < url.Length; i++) { for(int i = 0; i < url.Length; i++) {