Make Rust address getter return IpAddr instead of String

pkg/crate/libzt/src/node.rs

@@ -18,6 +18,9 @@
 include!(concat!("./libzt.rs"));
 
 use std::ffi::{c_void, CStr, CString};
+use std::str::FromStr;
+use std::net::{IpAddr,AddrParseError};
+use std::io;
 
 extern "C" fn native_event_handler(msg: *mut c_void) {
     let event: &mut zts_event_msg_t = unsafe { &mut *(msg as *mut zts_event_msg_t) };
@@ -103,13 +106,13 @@ impl ZeroTierNode {
         unsafe { zts_util_delay(interval_ms) }
     }
 
-    pub fn addr_get(&self, net_id: u64) -> String {
+    pub fn addr_get(&self, net_id: u64) -> Result<IpAddr,AddrParseError> {
         unsafe {
             let mut v = vec![0; (ZTS_INET6_ADDRSTRLEN as usize) + 1];
             let ptr = v.as_mut_ptr() as *mut i8;
             zts_addr_get_str(net_id, ZTS_AF_INET, ptr, ZTS_INET6_ADDRSTRLEN);
             let c_str = CStr::from_ptr(ptr);
-            return c_str.to_string_lossy().into_owned();
+            return IpAddr::from_str(&c_str.to_string_lossy().into_owned())
         }
     }
 }