解决win7不能启动的问题

switch/wintun/src/log.rs

@@ -0,0 +1,48 @@
+use crate::wintun_raw;
+use crate::Wintun;
+use log::*;
+use widestring::U16CStr;
+
+use std::sync::atomic::{AtomicBool, Ordering};
+
+/// Sets the logger wintun will use when logging. Maps to the WintunSetLogger C function
+pub fn set_logger(wintun: &Wintun, f: wintun_raw::WINTUN_LOGGER_CALLBACK) {
+    unsafe { wintun.WintunSetLogger(f) };
+}
+
+pub fn reset_logger(wintun: &Wintun) {
+    set_logger(wintun, None);
+}
+
+static SET_LOGGER: AtomicBool = AtomicBool::new(false);
+
+/// The logger that is active by default. Logs messages to the log crate
+///
+/// # Safety
+/// `message` must be a valid pointer that points to an aligned null terminated UTF-16 string
+pub unsafe extern "C" fn default_logger(
+    level: wintun_raw::WINTUN_LOGGER_LEVEL,
+    _timestamp: wintun_raw::DWORD64,
+    message: *const wintun_raw::WCHAR,
+) {
+    //Cant wait for RFC 2585
+    #[allow(unused_unsafe)]
+    //Wintun will always give us a valid UTF16 null termineted string
+    let msg = unsafe { U16CStr::from_ptr_str(message) };
+    let utf8_msg = msg.to_string_lossy();
+    match level {
+        wintun_raw::WINTUN_LOGGER_LEVEL_WINTUN_LOG_INFO => info!("WinTun: {}", utf8_msg),
+        wintun_raw::WINTUN_LOGGER_LEVEL_WINTUN_LOG_WARN => warn!("WinTun: {}", utf8_msg),
+        wintun_raw::WINTUN_LOGGER_LEVEL_WINTUN_LOG_ERR => error!("WinTun: {}", utf8_msg),
+        _ => error!("WinTun: {} (with invalid log level {})", utf8_msg, level),
+    }
+}
+
+pub(crate) fn set_default_logger_if_unset(wintun: &Wintun) {
+    if SET_LOGGER
+        .compare_exchange(false, true, Ordering::SeqCst, Ordering::Relaxed)
+        .is_ok()
+    {
+        set_logger(wintun, Some(default_logger));
+    }
+}