Use dynamic port for profile server

src/main.cpp

@@ -280,6 +280,34 @@ int WINAPI Mine_connect(SOCKET s, const sockaddr* name, int namelen)
     return ret;
 }
 
+/**
+ * @brief Locates profile server port addresses and sets the profile server port
+ *
+ * @return Failed to find the patterns or succeeded to write
+ */
+bool SetProfileServerPort(uint16_t profileServerPort)
+{
+    const char* module                   = (globals::g_Language == xiloader::Language::European) ? "polcoreeu.dll" : "polcore.dll";
+    auto        profileServerPortAddress = (DWORD)xiloader::functions::FindPattern(module, (BYTE*)"\x66\xC7\x46\x26\x14\xC8\x88\x46\x09\x8D\x46\x24", "xxxxxxxxxxx");
+    if (profileServerPortAddress == 0)
+    {
+        xiloader::console::output(xiloader::color::error, "Failed to locate profileServerPortAddress!");
+        return false;
+    }
+
+    auto profileServerPortAddress2 = (DWORD)xiloader::functions::FindPattern(module, (BYTE*)"\x66\xC7\x05\xBA\x4A\x3F\x04\x14\xC8", "xxxxx??xx"); // This pattern changed slightly on a few month old polcore, it used to be a total match but some bytes changed.
+    if (profileServerPortAddress2 == 0)
+    {
+        xiloader::console::output(xiloader::color::error, "Failed to locate profileServerPortAddress2!");
+        return false;
+    }
+
+    *((uint16_t*)(profileServerPortAddress + 4))  = profileServerPort;
+    *((uint16_t*)(profileServerPortAddress2 + 7)) = profileServerPort;
+
+    return true;
+}
+
 /**
  * @brief Locates the INET mutex function call inside of polcore.dll
  *
@@ -701,6 +729,15 @@ int __cdecl main(int argc, char* argv[])
                     CreateThread(NULL, 0, (LPTHREAD_START_ROUTINE)ApplyHairpinFixThread, NULL, 0, NULL);
                 }
 
+                struct sockaddr_in pol_sin;
+                int                pol_len           = sizeof(pol_sin);
+                unsigned short     profileServerPort = 0;
+
+                if (getsockname(polsock, (struct sockaddr*)&pol_sin, &pol_len) == 0)
+                {
+                    profileServerPort = ntohs(pol_sin.sin_port);
+                }
+
                 /* Create listen servers.. */
                 globals::g_IsRunning = true;
                 HANDLE hFFXiServer   = CreateThread(NULL, 0, xiloader::network::FFXiServer, &sock, 0, NULL);
@@ -747,6 +784,11 @@ int __cdecl main(int argc, char* argv[])
                     lpCommandTable[POLFUNC_INSTALL_FOLDER](xiloader::functions::GetRegistryPlayOnlineInstallFolder(globals::g_Language));
                     lpCommandTable[POLFUNC_INET_MUTEX]();
 
+                    if (!SetProfileServerPort(profileServerPort))
+                    {
+                        return 1;
+                    }
+
                     /* Attempt to create FFXi instance..*/
                     IFFXiEntry* ffxi = NULL;
                     if (CoCreateInstance(xiloader::CLSID_FFXiEntry, NULL, 0x17, xiloader::IID_IFFXiEntry, (LPVOID*)&ffxi) != S_OK)

src/network.cpp

@@ -249,7 +249,7 @@ namespace xiloader
         sockaddr_in sin     = {};
         sin.sin_family      = AF_INET;
         sin.sin_addr.s_addr = inet_addr("127.0.0.1");
-        sin.sin_port        = htons(51220);
+        sin.sin_port        = htons(0);
 
         /* Create the listening socket.. */
         *sock = socket(AF_INET, protocol == IPPROTO_UDP ? SOCK_DGRAM : SOCK_STREAM, protocol);