Add support X-Forwarded-For

pkg/tcp/helpers.go

@@ -0,0 +1,12 @@
+package tcp
+
+import (
+	"net/http"
+)
+
+func RemoteAddr(r *http.Request) string {
+	if remote := r.Header.Get("X-Forwarded-For"); remote != "" {
+		return remote + ", " + r.RemoteAddr
+	}
+	return r.RemoteAddr
+}