From 20b452656e2195ae85c7748675aa73471fc5cd1e Mon Sep 17 00:00:00 2001
From: Hatter Jiang <jht5945@gmail.com>
Date: Sat, 19 Sep 2020 20:07:49 +0800
Subject: [PATCH] refactor: ipv4_to_u32

---
 src/util_net.rs | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/util_net.rs b/src/util_net.rs
index 2b033c2..0de86fc 100644
--- a/src/util_net.rs
+++ b/src/util_net.rs
@@ -190,7 +190,8 @@ fn ipv4_mask(mask: u8) -> u32 {
 }
 
 fn ipv4_to_u32(ipv4: &[u8; 4]) -> u32 {
-    ((ipv4[0] as u32) << (8 * 3)) + ((ipv4[1] as u32) << (8 * 2)) + ((ipv4[2] as u32) << 8) + (ipv4[3] as u32)
+    u32::from_be_bytes(*ipv4)
+    // ((ipv4[0] as u32) << (8 * 3)) + ((ipv4[1] as u32) << (8 * 2)) + ((ipv4[2] as u32) << 8) + (ipv4[3] as u32)
 }
 
 fn parse_ipv4_addr(addr: &str) -> Option<[u8; 4]>  {