From b7f33a9c4067f41b742e08c8817a53f6ff62cbb6 Mon Sep 17 00:00:00 2001
From: Jack Back <alterware@proton.me>
Date: Sun, 31 Mar 2024 22:35:15 +0200
Subject: [PATCH] maint(network): very good fix

---
 src/client/component/dedicated.cpp |  4 ++++
 src/client/component/network.cpp   | 10 ++++++++++
 2 files changed, 14 insertions(+)

diff --git a/src/client/component/dedicated.cpp b/src/client/component/dedicated.cpp
index 434345e..03b951b 100644
--- a/src/client/component/dedicated.cpp
+++ b/src/client/component/dedicated.cpp
@@ -294,6 +294,10 @@ namespace dedicated
 			utils::hook::call(0x140412FD3, execute_console_command);
 			utils::hook::nop(0x140412FE9, 5);
 
+			// disable check on an unregistered relay dvar
+			utils::hook::nop(0x14041E9EB, 4);
+			utils::hook::set<std::uint8_t>(0x14041E9EF, 0xEB);
+
 			utils::hook::nop(0x1404DDC2E, 5); // don't load config file
 			utils::hook::set<uint8_t>(0x140416100, 0xC3); // don't save config file
 			utils::hook::set<uint8_t>(0x1402E5830, 0xC3); // disable self-registration
diff --git a/src/client/component/network.cpp b/src/client/component/network.cpp
index 6f77828..d88a626 100644
--- a/src/client/component/network.cpp
+++ b/src/client/component/network.cpp
@@ -94,6 +94,11 @@ namespace network
 			// Rather than try and let the player in, just tell them they are a duplicate player and reject connection
 			game::NET_OutOfBandPrint(game::NS_SERVER, from, "error\nYou are already connected to the server.");
 		}
+
+		void* memmove_stub(void* dest, const void* src, std::size_t count)
+		{
+			return std::memmove(dest, src, std::min<std::size_t>(count, 1262));
+		}
 	}
 
 	void on(const std::string& command, const callback& callback)
@@ -278,6 +283,11 @@ namespace network
 
 				// ignore built in "print" oob command for security reasons
 				utils::hook::set<std::uint8_t>(0x1402C6AA4, 0xEB);
+
+				// patch buffer overflow
+				utils::hook::call(0x14041D355, memmove_stub);
+				// this patches a crash found in a subroutine registered using atexit
+				utils::hook::set<std::uint8_t>(0x140815D4E, 0xEB);
 			}
 		}
 	};