Rollup merge of #59106 - LinusU:udp-peer-addr, r=kennytm

Add peer_addr function to UdpSocket

Fixes #59104

This is my first pull request to Rust, so opening early for some feedback.

My biggest question is: where do I add tests?

Any comments very much appreciated!

5 files changed, 21 insertions, 1 deletions

diff --git a/src/libstd/sys/cloudabi/shims/net.rs b/src/libstd/sys/cloudabi/shims/net.rs
index 6d2a4962ab4..4364a136544 100644
--- a/src/libstd/sys/cloudabi/shims/net.rs
+++ b/src/libstd/sys/cloudabi/shims/net.rs
@@ -159,6 +159,10 @@ impl UdpSocket {
         unsupported()
     }
 
+    pub fn peer_addr(&self) -> io::Result<SocketAddr> {
+        match self.0 {}
+    }
+
     pub fn socket_addr(&self) -> io::Result<SocketAddr> {
         match self.0 {}
     }
diff --git a/src/libstd/sys/redox/net/udp.rs b/src/libstd/sys/redox/net/udp.rs
index b1a60b14570..274123dce4b 100644
--- a/src/libstd/sys/redox/net/udp.rs
+++ b/src/libstd/sys/redox/net/udp.rs
@@ -72,6 +72,11 @@ impl UdpSocket {
         Ok(None)
     }
 
+    pub fn peer_addr(&self) -> Result<SocketAddr> {
+        let path = self.0.path()?;
+        Ok(path_to_peer_addr(path.to_str().unwrap_or("")))
+    }
+
     pub fn socket_addr(&self) -> Result<SocketAddr> {
         let path = self.0.path()?;
         Ok(path_to_local_addr(path.to_str().unwrap_or("")))
diff --git a/src/libstd/sys/sgx/net.rs b/src/libstd/sys/sgx/net.rs
index e167e917957..81f33c16294 100644
--- a/src/libstd/sys/sgx/net.rs
+++ b/src/libstd/sys/sgx/net.rs
@@ -249,6 +249,10 @@ impl UdpSocket {
         unsupported()
     }
 
+    pub fn peer_addr(&self) -> io::Result<SocketAddr> {
+        match self.0 {}
+    }
+
     pub fn socket_addr(&self) -> io::Result<SocketAddr> {
         match self.0 {}
     }
diff --git a/src/libstd/sys/unix/l4re.rs b/src/libstd/sys/unix/l4re.rs
index b9e725371a3..b3dd1cf6aaa 100644
--- a/src/libstd/sys/unix/l4re.rs
+++ b/src/libstd/sys/unix/l4re.rs
@@ -292,6 +292,10 @@ pub mod net {
 
         pub fn into_socket(self) -> Socket { self.inner }
 
+        pub fn peer_addr(&self) -> io::Result<SocketAddr> {
+            unimpl!();
+        }
+
         pub fn socket_addr(&self) -> io::Result<SocketAddr> {
             unimpl!();
         }
@@ -463,4 +467,3 @@ pub mod net {
         }
     }
 }
-
diff --git a/src/libstd/sys/wasm/net.rs b/src/libstd/sys/wasm/net.rs
index a2ea2dfbbc0..c85dd000afe 100644
--- a/src/libstd/sys/wasm/net.rs
+++ b/src/libstd/sys/wasm/net.rs
@@ -156,6 +156,10 @@ impl UdpSocket {
         unsupported()
     }
 
+    pub fn peer_addr(&self) -> io::Result<SocketAddr> {
+        match self.0 {}
+    }
+
     pub fn socket_addr(&self) -> io::Result<SocketAddr> {
         match self.0 {}
     }