From 44a727782753e34528c2c3b9691101cc2693f8dd Mon Sep 17 00:00:00 2001
From: RustDesk <71636191+rustdesk@users.noreply.github.com>
Date: Tue, 10 Jun 2025 12:04:45 +0800
Subject: [PATCH] time_based_rand

---
 src/lib.rs | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/src/lib.rs b/src/lib.rs
index 3f24fdf..ef99c7b 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -447,6 +447,20 @@ pub fn version_check_request(typ: String) -> (VersionCheckRequest, String) {
     )
 }
 
+pub fn time_based_rand() -> u32 {
+    let nanos = std::time::SystemTime::now()
+        .duration_since(std::time::UNIX_EPOCH)
+        .unwrap()
+        .as_nanos();
+
+    let mut x = nanos as u64;
+    x ^= x << 13;
+    x ^= x >> 7;
+    x ^= x << 17;
+
+    (x % 32768) as u32
+}
+
 #[cfg(test)]
 mod test {
     use super::*;