From a4a0119f97e680695430ec535ae9c54a72881ce4 Mon Sep 17 00:00:00 2001
From: DavidVentura <davidventura27@gmail.com>
Date: Thu, 18 Jan 2024 13:54:48 +0100
Subject: [PATCH] write bytearrays

---
 func_replacements.js | 47 +++++++++++++++++++++++++++++++++-----------
 1 file changed, 36 insertions(+), 11 deletions(-)

diff --git a/func_replacements.js b/func_replacements.js
index a805c3d..536481d 100644
--- a/func_replacements.js
+++ b/func_replacements.js
@@ -1,21 +1,28 @@
+const pack_P2pHdr = (in_buf, out_buf) => {
+  // shitty memcpy
+  out_buf.writeByteArray(in_buf.readByteArray(4));
+  //out_buf.writeU16(in_buf.readU16());
+  //out_buf.add(2).writeU16(in_buf.add(2).readU16());
+  return 4;
+};
+
 const create_LanSearch = (buf) => {
-  // buf is u16*
-  buf.writeU16(0x30f1);
-  buf.add(2).writeU16(0x0);
-  return 4; // 2 x u16 entries = 4bytes
+  buf.writeByteArray([0xf1, 0x30, 0x00, 0x00]);
+  return 4;
 };
 
 const create_P2pAliveAck = (buf) => {
-  // buf is u16*
-  buf.writeU16(0xe1f1);
-  buf.add(2).writeU16(0x0);
-  return 4; // 2 x u16 entries = 4bytes
+  buf.writeByteArray([0xf1, 0xe1, 0x00, 0x00]);
+  return 4;
 };
 const create_P2pAlive = (buf) => {
-  // buf is u16*
-  buf.writeU16(0xe0f1);
+  buf.writeByteArray([0xf1, 0xe0, 0x00, 0x00]);
+  return 4;
+};
+
+const create_Hello = (buf) => {
+  buf.writeU16(0xf1);
   buf.add(2).writeU16(0x0);
-  return 4; // 2 x u16 entries = 4bytes
 };
 
 export const replace_func = (stub, ret, args) => {
@@ -31,11 +38,29 @@ export const replace_func = (stub, ret, args) => {
   Interceptor.replace(symbol_addr, new NativeCallback(stub, ret, args));
 };
 
+/* Send_Pkt_LanSearch =
+ * create_LanSearch(buf)
+ * pack_ClntPkt(2, buf, &packed_buf)
+ * UdpPktSend(packed_buf)
+ */
+/* Send_Pkt_Hello =
+ * create_Hello
+ * pack_ClntPkt
+ * UdpPktSend
+ */
+
+/* pack_ClntPkt =
+ * pack_P2pHdr
+ * pack_
+ * 	RSLgnEx, RlyReq4, RlyPortAck, RlyPortExAck, RlyReqEx, Drw, HelloToAck, DrwAck, DevLgn4, LanSearchExtAck, P2pReq4, RSLGn
+ */
 export const replaceFunctions = () => {
   const replacements = [
     [create_P2pAlive, "uchar", ["pointer"]],
     [create_P2pAliveAck, "uchar", ["pointer"]],
     [create_LanSearch, "uchar", ["pointer"]],
+    [create_Hello, "uchar", ["pointer"]],
+    [pack_P2pHdr, "uchar", ["pointer", "pointer"]],
   ];
 
   replacements.forEach((x) => replace_func(...x));