From d22aa9de2df35049714dba7ed62cdf070f4e62dd Mon Sep 17 00:00:00 2001
From: hugy <504650082@qq.com>
Date: Sat, 3 Jun 2023 17:06:48 +0800
Subject: [PATCH] fix: sendAppMsg update free addr

---
 src/send_message_mgr.cc | 27 ++++++++++++++++++---------
 src/wechat_function.h   | 29 ++++++++++++++++++++++++++++-
 2 files changed, 46 insertions(+), 10 deletions(-)

diff --git a/src/send_message_mgr.cc b/src/send_message_mgr.cc
index 74f9a1b..12f417c 100644
--- a/src/send_message_mgr.cc
+++ b/src/send_message_mgr.cc
@@ -391,11 +391,16 @@ int SendMessageMgr::SendAppletMsg(wchar_t* wxid, wchar_t* appletid){
   receiver_list.push_back(wwxid);
   VectorInner* list = (VectorInner*)&receiver_list;
   DWORD receiver_list_ptr = (DWORD)&list->start;
- 
+
   WeChatString wapplet(appletid);
-  char req[0x268]={0};
+  char req[0x268] = {0};
   char temp[0x4] = {0};
-  char buff[0x88]={0};
+  char buff[0x88] = {0};
+  DWORD flag = 0xF;
+  DWORD zero = 0;
+  WeChatStr clean;
+  WeChatStr app_id(c_applet_id);
+
   __asm{
     PUSHAD
     PUSHFD
@@ -406,7 +411,8 @@ int SendMessageMgr::SendAppletMsg(wchar_t* wxid, wchar_t* appletid){
   }
   // 0x40  gh   
   // 0xE8  img
-  memcpy(&req[0x4], &c_applet_id, sizeof(c_applet_id));
+  memcpy(&req[0x4], &app_id, sizeof(app_id));
+
   __asm{
     PUSHAD
     PUSHFD    
@@ -442,15 +448,18 @@ int SendMessageMgr::SendAppletMsg(wchar_t* wxid, wchar_t* appletid){
     POPAD
   }
 
-  __asm{
+// no need for WeChat to release memory
+memcpy(&req[0x4], &clean, sizeof(clean));
+memcpy(&req[0xC8], &zero, sizeof(zero));
+memcpy(&req[0xCC], &flag, sizeof(flag));
+__asm {
     PUSHAD
     PUSHFD   
     LEA        ECX,req
-    PUSH       0x0
     CALL       free_share_app_msg_req_addr
     POPFD
     POPAD
-  }
-  return success;
 }
-}  // namespace wxhelper
\ No newline at end of file
+return success;
+}
+}  // namespace wxhelperg
\ No newline at end of file
diff --git a/src/wechat_function.h b/src/wechat_function.h
index b8751d3..5d88a93 100644
--- a/src/wechat_function.h
+++ b/src/wechat_function.h
@@ -200,7 +200,8 @@
 
 // send app msg
 #define NEW_SHARE_APP_MSG_REQ_OFFSET 0xfbae50
-#define FREE_SHARE_APP_MSG_REQ_OFFSET 0xfbc0d0
+// #define FREE_SHARE_APP_MSG_REQ_OFFSET 0xfbc0d0
+#define FREE_SHARE_APP_MSG_REQ_OFFSET 0xfbc100
 #define NEW_WA_UPDATABLE_MSG_INFO_OFFSET 0x7b3d30
 #define FREE_WA_UPDATABLE_MSG_INFO_OFFSET 0x79d4c0
 #define SEND_APP_MSG_OFFSET 0xfe8e40
@@ -808,4 +809,30 @@ struct ContactProfile{
   std::wstring nickname;
   std::wstring head_image;
 };
+
+struct WeChatStr{
+  char * ptr;
+  DWORD  field1;
+  DWORD  field2;
+  DWORD  field3;
+  DWORD  len;
+  DWORD  maxlen;
+
+   WeChatStr(const char* p) {
+    ptr = (char *)p;
+    field1 = 0;
+    field2 = 0;
+    field3 = 0;
+    len = strlen(p);
+    maxlen = len | 0xF;
+  }
+   WeChatStr() {
+    ptr = NULL;
+    field1 = 0;
+    field2 = 0;
+    field3 = 0;
+    len = 0;
+    maxlen = 0xF;
+  }
+};
 #endif
\ No newline at end of file