From 360691276c3385e05db6e807b5a61b6b7e16ebdc Mon Sep 17 00:00:00 2001
From: "Sijie.Sun" <sunsijie@buaa.edu.cn>
Date: Sun, 2 Jun 2024 14:07:21 +0800
Subject: [PATCH] support win7 and reduce win mem usage (#128)

---
 Cargo.lock                           | 3 +--
 easytier/Cargo.toml                  | 2 +-
 easytier/src/instance/virtual_nic.rs | 6 ++++++
 3 files changed, 8 insertions(+), 3 deletions(-)

diff --git a/Cargo.lock b/Cargo.lock
index 4f482b3..5cd54e2 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -5491,8 +5491,7 @@ checksum = "e421abadd41a4225275504ea4d6566923418b7f05506fbc9c0fe86ba7396114b"
 [[package]]
 name = "tun"
 version = "0.6.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0adb9992bbd5ca76f3847ed579ad4ee8defb2ec2eea918cceef17ccc66fa4fd4"
+source = "git+https://github.com/EasyTier/rust-tun.git?rev=e4fd1cd#e4fd1cdd5321ac1ad6f19954e982194688b95aff"
 dependencies = [
  "byteorder",
  "bytes",
diff --git a/easytier/Cargo.toml b/easytier/Cargo.toml
index e488de3..b0d03b7 100644
--- a/easytier/Cargo.toml
+++ b/easytier/Cargo.toml
@@ -85,7 +85,7 @@ http = { version = "1", default-features = false, features = [
 tokio-rustls = { version = "0.26", default-features = false, optional = true }
 
 # for tap device
-tun = { version = "0.6.1", features = ["async"] }
+tun = { git = "https://github.com/EasyTier/rust-tun.git", features = ["async"], rev = "e4fd1cd" }
 # for net ns
 nix = { version = "0.27", features = ["sched", "socket", "ioctl"] }
 
diff --git a/easytier/src/instance/virtual_nic.rs b/easytier/src/instance/virtual_nic.rs
index 34143ad..7f5ed4c 100644
--- a/easytier/src/instance/virtual_nic.rs
+++ b/easytier/src/instance/virtual_nic.rs
@@ -289,6 +289,12 @@ impl VirtualNic {
             config.name(format!("et{}_{}_{}", self.dev_name, c, s));
             // set a temporary address
             config.address(format!("172.0.{}.3", c).parse::<IpAddr>().unwrap());
+
+            config.platform(|config| {
+                config.skip_config(true);
+                config.guid(None);
+                config.ring_cap(Some(config.min_ring_cap() * 2));
+            });
         }
 
         if self.queue_num != 1 {