Enforce network IP restriction

Cargo.lock

@@ -68,6 +68,17 @@ dependencies = [
  "syn",
 ]
 
+[[package]]
+name = "actix-remote-ip"
+version = "0.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7629b357d4705cf3f1e31f989f48ecd56027112f7d52dcf06dd96ee197065f8e"
+dependencies = [
+ "actix-web",
+ "futures-util",
+ "log",
+]
+
 [[package]]
 name = "actix-router"
 version = "0.5.3"
@@ -1887,6 +1898,7 @@ checksum = "04cbf5b083de1c7e0222a7a51dbfdba1cbe1c6ab0b15e29fff3f6c077fd9cd9f"
 name = "matrix_gateway"
 version = "0.1.0"
 dependencies = [
+ "actix-remote-ip",
  "actix-session",
  "actix-web",
  "anyhow",