ci: use winpcap 4.1.3.20161116 for CI since npcap free version does n…

…ot support silent install

Refs: https://npcap.com/guide/npcap-users-guide.html#npcap-installation-options

build.rs

@@ -7,7 +7,7 @@ fn main() {
     }
 
     #[cfg(windows)]
-    download_winpcap_dll();
+    install_winpcap();
 }
 
 fn download_winpcap_sdk() {
@@ -35,12 +35,8 @@ fn download_winpcap_sdk() {
 
     let target_arch = env::var("CARGO_CFG_TARGET_ARCH").unwrap();
     let lib_dir = match target_arch.as_str() {
-        "x86_64" => {
-            "Lib/x64"
-        }
-        _ => {
-             "Lib"
-        }
+        "x86_64" => "Lib/x64",
+        _ => "Lib",
     };
 
     let lib_path = format!("{}/{}", lib_dir, lib_name);
@@ -63,6 +59,7 @@ fn download_winpcap_sdk() {
     println!("cargo:rustc-link-search=native={}/{}", out_dir, lib_dir);
 }
 
+#[allow(dead_code)]
 #[cfg(windows)]
 fn download_winpcap_dll() {
     use http_req::request;
@@ -105,3 +102,21 @@ fn download_winpcap_dll() {
         panic!("CFixInstall.bat failing with error: {:?}", output);
     }
 }
+
+#[cfg(windows)]
+fn install_winpcap() {
+    use std::process::Command;
+
+    // cinst -y winpcap --version 4.1.3.20161116
+    let output = Command::new("cinst")
+        .arg("-y")
+        .arg("winpcap")
+        .arg("--version")
+        .arg("4.1.3.20161116")
+        .output()
+        .expect("failed to run winpcap install command");
+
+    if !output.status.success() {
+        panic!("install winpcap failing with error: {:?}", output);
+    }
+}