1 files changed, 10 insertions, 0 deletions
diff --git a/src/libstd/net/mod.rs b/src/libstd/net/mod.rs
index 7f51b1cba3f..68f3098d993 100644
--- a/src/libstd/net/mod.rs
+++ b/src/libstd/net/mod.rs
@@ -111,3 +111,13 @@ impl Iterator for LookupHost {
 pub fn lookup_host(host: &str) -> io::Result<LookupHost> {
     net_imp::lookup_host(host).map(LookupHost)
 }
+
+/// Resolve the given address to a hostname.
+///
+/// This function may perform a DNS query to resolve `addr` and may also inspect
+/// system configuration to resolve the specified address. If the address
+/// cannot be resolved, it is returned in string format.
+#[unstable(feature = "lookup_addr", reason = "recent addition")]
+pub fn lookup_addr(addr: &IpAddr) -> io::Result<String> {
+    net_imp::lookup_addr(addr)
+}