Define TCP_CA_NAME_MAX

src/sys/socket/sockopt.rs

@@ -8,6 +8,11 @@ use std::os::raw::c_char;
 use std::os::unix::io::RawFd;
 use std::ffi::{CStr, CString};
 
+// Constants
+// TCP_CA_NAME_MAX isn't defined in user space include files
+#[cfg(any(target_os = "freebsd", target_os = "linux"))] 
+const TCP_CA_NAME_MAX: usize = 16;
+
 /// Helper for implementing `SetSockOpt` for a given socket option. See
 /// [`::sys::socket::SetSockOpt`](sys/socket/trait.SetSockOpt.html).
 ///
@@ -264,8 +269,7 @@ sockopt_impl!(Both, Mark, libc::SOL_SOCKET, libc::SO_MARK, u32);
 #[cfg(any(target_os = "android", target_os = "linux"))]
 sockopt_impl!(Both, PassCred, libc::SOL_SOCKET, libc::SO_PASSCRED, bool);
 #[cfg(any(target_os = "freebsd", target_os = "linux"))] 
-sockopt_impl!(Both, TcpCongestion, libc::IPPROTO_TCP, libc::TCP_CONGESTION, CString<[u8; 16]>);
-// TODO: Use libc::TCP_CA_NAME_MAX (https://github.com/rust-lang/libc/pull/1151)
+sockopt_impl!(Both, TcpCongestion, libc::IPPROTO_TCP, libc::TCP_CONGESTION, CString<[u8; TCP_CA_NAME_MAX]>);
 
 /*
  *