From 7e022c590fb0fb6083be7825df90045505e6fe47 Mon Sep 17 00:00:00 2001
From: Eric Reed <ereed@mozilla.com>
Date: Mon, 17 Jun 2013 12:33:10 -0700
Subject: [PATCH] added a function to convert C's ipv4 data structure into the
 Rust ipv4 data structure.

---
 src/libstd/rt/uv/net.rs | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/src/libstd/rt/uv/net.rs b/src/libstd/rt/uv/net.rs
index 4079a2f7b770..0b77bd83958e 100644
--- a/src/libstd/rt/uv/net.rs
+++ b/src/libstd/rt/uv/net.rs
@@ -38,6 +38,14 @@ fn ip4_as_uv_ip4<T>(addr: IpAddr, f: &fn(*sockaddr_in) -> T) -> T {
     }
 }
 
+pub fn uv_ip4_to_ip4(addr: *sockaddr_in) -> IpAddr {
+    let ip4_size = 16;
+    let buf = vec::from_elem(ip4_size, 0u8);
+    unsafe { ip4_name(addr, &buf[0], ip4_size as u64) };
+    let port = unsafe { ip4_port(addr) };
+    Ipv4(buf[0], buf[1], buf[2], buf[3], port as u16)
+}
+
 // uv_stream t is the parent class of uv_tcp_t, uv_pipe_t, uv_tty_t
 // and uv_file_t
 pub struct StreamWatcher(*uvll::uv_stream_t);