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+= nng_recvmsg(3)
+//
+// Copyright 2018 Staysail Systems, Inc. <info@staysail.tech>
+// Copyright 2018 Capitar IT Group BV <info@capitar.com>
+//
+// This document is supplied under the terms of the MIT License, a
+// copy of which should be located in the distribution where this
+// file was obtained (LICENSE.txt).  A copy of the license may also be
+// found online at https://opensource.org/licenses/MIT.
+//
+
+== NAME
+
+nng_recvmsg - recv message
+
+== SYNOPSIS
+
+[source, c]
+-----------
+#include <nng/nng.h>
+
+int nng_recvmsg(nng_socket s, nng_msg **msgp, int flags);
+-----------
+
+== DESCRIPTION
+
+The `nng_recvmsg()` receives a message on socket _s_, storing the
+received message at the location pointed to by _msgp_.
+
+TIP: Using this function gives access to the message structure, and thus may
+offer more functionality than the simpler <<nng_recv.3#,`nng_recv()`>> function.
+
+The _flags_ may contain the following value:
+
+`NNG_FLAG_NONBLOCK`::
+  The function returns immediately, even if no message is available.
+  Without   this flag, the function will wait until a message is received
+  by the socket   _s_, or any configured timer expires.
+
+NOTE: The semantics of what receiving a message means vary from protocol to
+protocol, so examination of the protocol documentation is encouraged.
+(For example, with an <<nng_req.7#,_req_>> socket a message may only be received
+after a request has been sent, and an <<nng_sub.7#,_sub_>> socket
+may only receive messages corresponding to topics to which it has subscribed.)
+Furthermore, some protocols may not support receiving data at all, such as
+<<nng_pub.7#,_pub_>>.
+
+== RETURN VALUES
+
+This function returns 0 on success, and non-zero otherwise.
+
+== ERRORS
+
+`NNG_EAGAIN`:: The socket _s_ cannot accept data for sending.
+`NNG_ECLOSED`:: The socket _s_ is not open.
+`NNG_EINVAL`:: An invalid set of _flags_ was specified.
+`NNG_ENOMEM`:: Insufficient memory is available.
+`NNG_ENOTSUP`:: The protocol for socket _s_ does not support receiving.
+`NNG_ESTATE`:: The socket _s_ cannot receive data in this state.
+
+== SEE ALSO
+
+<<nng_msg_free.3#,nng_msg_free(3)>>,
+<<nng_recv.3#,nng_recv(3)>>,
+<<nng_sendmsg.3#,nng_sendmsg(3)>>,
+<<nng_strerror.3#,nng_strerror(3)>>,
+<<nng.7#,nng(7)>>