Index: lib/libc/sys/send.2
===================================================================
--- lib/libc/sys/send.2
+++ lib/libc/sys/send.2
@@ -69,12 +69,21 @@
 function
 may be used only when the socket is in a
 .Em connected
-state, while
+state.
+
+The functions
 .Fn sendto ,
 .Fn sendmsg
 and
 .Fn sendmmsg
-may be used at any time.
+may be used at any time if the socket is connectionless-mode.
+If the socket is connection-mode, the protocol
+must support implied connect (currently
+.Xr tcp 4
+is the only protocol with support) or the socket must be in a
+.Em connected
+state before use (see
+.Xr connect 2 ) .
 .Pp
 The address of the target is given by
 .Fa to
@@ -195,6 +204,8 @@
 The destination address is a broadcast address, and
 .Dv SO_BROADCAST
 has not been set on the socket.
+.It Bq Er ENOTCONN
+The socket is connection-mode but is not connected.
 .It Bq Er ENOTSOCK
 The argument
 .Fa s