added getpeername to sys/socket

1 files changed, 23 insertions, 1 deletions

diff --git a/src/sys/socket.rs b/src/sys/socket.rs
index ce5a113d..09dda4d2 100644
--- a/src/sys/socket.rs
+++ b/src/sys/socket.rs
@@ -11,7 +11,7 @@ pub use self::consts::*;
 
 mod ffi {
     use libc::{c_int, c_void, socklen_t};
-    pub use libc::{socket, listen, bind, accept, connect, setsockopt, sendto, recvfrom, getsockname};
+    pub use libc::{socket, listen, bind, accept, connect, setsockopt, sendto, recvfrom, getsockname, getpeername};
 
     extern {
         pub fn getsockopt(
@@ -480,6 +480,28 @@ pub fn setsockopt<T>(fd: Fd, level: SockLevel, opt: SockOpt, val: &T) -> SysResu
     from_ffi(res)
 }
 
+fn getpeername_sockaddr<T>(sockfd: Fd, addr: &T) -> SysResult<bool> {
+    let addrlen_expected = mem::size_of::<T>() as socklen_t;
+    let mut addrlen = addrlen_expected;
+
+    let ret = unsafe { ffi::getpeername(sockfd, mem::transmute(addr), &mut addrlen) };
+    if ret < 0 {
+        return Err(SysError::last());
+    }
+
+    Ok(addrlen == addrlen_expected)
+}
+
+pub fn getpeername(sockfd: Fd, addr: &mut SockAddr) -> SysResult<bool> {
+    use self::SockAddr::*;
+
+    match *addr {
+        SockIpV4(ref addr) => getpeername_sockaddr(sockfd, addr),
+        SockIpV6(ref addr) => getpeername_sockaddr(sockfd, addr),
+        SockUnix(ref addr) => getpeername_sockaddr(sockfd, addr)
+    }
+}
+
 fn getsockname_sockaddr<T>(sockfd: Fd, addr: &T) -> SysResult<bool> {
     let addrlen_expected = mem::size_of::<T>() as socklen_t;
     let mut addrlen = addrlen_expected;