3 ==================================================================================
4 Copyright (c) 2020 Nokia
5 Copyright (c) 2020 AT&T Intellectual Property.
7 Licensed under the Apache License, Version 2.0 (the "License");
8 you may not use this file except in compliance with the License.
9 You may obtain a copy of the License at
11 http://www.apache.org/licenses/LICENSE-2.0
13 Unless required by applicable law or agreed to in writing, software
14 distributed under the License is distributed on an "AS IS" BASIS,
15 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
16 See the License for the specific language governing permissions and
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18 ==================================================================================
23 Abstract: A message wrapper. This should completely hide the
24 underlying transport (RMR) message structure from
25 the user application. For the most part, the getters
26 are used by the framwork; it is unlikely that other
27 than adding/extracting the MEID, the user app will
28 be completely unaware of information that is not
29 presented in the callback parms.
32 Author: E. Scott Daniels
42 #include "message.hpp"
48 // --------------- private ------------------------------------------------
50 // --------------- builders/operators -------------------------------------
53 Create a new message wrapper for an existing RMR msg buffer.
55 xapp::Message::Message( rmr_mbuf_t* mbuf, void* mrc ) {
56 this->mrc = mrc; // the message router context for sends
60 xapp::Message::Message( void* mrc, int payload_len ) {
62 this->mbuf = rmr_alloc_msg( mrc, payload_len );
66 Copy builder. Given a source object instance (soi), create a copy.
67 Creating a copy should be avoided as it can be SLOW!
69 xapp::Message::Message( const Message& soi ) {
73 payload_size = rmr_payload_size( soi.mbuf ); // rmr can handle a nil pointer
74 mbuf = rmr_realloc_payload( soi.mbuf, payload_size, RMR_COPY, RMR_CLONE );
78 Assignment operator. Simiolar to the copycat, but "this" object exists and
79 may have data that needs to be released prior to making a copy of the soi.
81 Message& xapp::Message::operator=( const Message& soi ) {
84 if( this != &soi ) { // cannot do self assignment
86 rmr_free_msg( mbuf ); // release the old one so we don't leak
89 payload_size = rmr_payload_size( soi.mbuf ); // rmr can handle a nil pointer
91 mbuf = rmr_realloc_payload( soi.mbuf, payload_size, RMR_COPY, RMR_CLONE );
98 Move builder. Given a source object instance (soi), move the information from
99 the soi ensuring that the destriction of the soi doesn't trash things from
102 xapp::Message::Message( Message&& soi ) {
106 soi.mrc = NULL; // prevent closing of RMR stuff on soi destroy
111 Move Assignment operator. Move the message data to the existing object
112 ensure the object reference is cleaned up, and ensuring that the source
113 object references are removed.
115 Message& xapp::Message::operator=( Message&& soi ) {
116 if( this != &soi ) { // cannot do self assignment
118 rmr_free_msg( mbuf ); // release the old one so we don't leak
135 xapp::Message::~Message() {
137 rmr_free_msg( mbuf );
144 // --- getters/setters -----------------------------------------------------
146 Copy the payload bytes, and return a smart pointer (unique) to it.
147 If the application needs to update the payload in place for a return
148 to sender call, or just to access the payload in a more efficent manner
149 (without the copy), the Get_payload() function should be considered.
151 This function will return a NULL pointer if malloc fails.
153 //char* Message::Copy_payload( ){
154 std::unique_ptr<unsigned char> xapp::Message::Copy_payload( ){
157 unsigned char* new_payload = new unsigned char[mbuf->len];
158 memcpy( new_payload, mbuf->payload, mbuf->len );
159 return std::unique_ptr<unsigned char>( new_payload );
166 Makes a copy of the MEID and returns a smart pointer to it.
168 std::unique_ptr<unsigned char> xapp::Message::Get_meid(){
169 unsigned char* m = NULL;
171 m = (unsigned char *) malloc( sizeof( unsigned char ) * RMR_MAX_MEID );
172 rmr_get_meid( mbuf, m );
174 return std::unique_ptr<unsigned char>( m );
178 Return the total size of the payload (the amount that can be written to
179 as opposed to the portion of the payload which is currently in use.
180 If mbuf isn't valid (nil, or message has a broken header) the return
183 int xapp::Message::Get_available_size(){
184 return rmr_payload_size( mbuf ); // rmr can handle a nil pointer
187 int xapp::Message::Get_mtype(){
188 int rval = INVALID_MTYPE;
198 Makes a copy of the source field and returns a smart pointer to it.
200 std::unique_ptr<unsigned char> xapp::Message::Get_src(){
201 unsigned char* m = new unsigned char[RMR_MAX_SRC];
204 rmr_get_src( mbuf, m );
207 return std::unique_ptr<unsigned char>( m );
210 int xapp::Message::Get_state( ){
211 int state = INVALID_STATUS;
220 int xapp::Message::Get_subid(){
221 int rval = INVALID_SUBID;
231 Return the amount of the payload (bytes) which is used. See
232 Get_available_size() to get the total usable space in the payload.
234 int xapp::Message::Get_len(){
245 This returns a smart (unique) pointer to the payload portion of the
246 message. This provides the user application with the means to
247 update the payload in place to avoid multiple copies. The
248 user programme is responsible to determing the usable payload
249 length by calling Message:Get_available_size(), and ensuring that
250 writing beyond the indicated size does not happen.
252 Msg_component xapp::Message::Get_payload(){
254 return std::unique_ptr<unsigned char, unfreeable>( mbuf->payload );
260 void xapp::Message::Set_meid( std::shared_ptr<unsigned char> new_meid ) {
262 rmr_str2meid( mbuf, (unsigned char *) new_meid.get() );
266 void xapp::Message::Set_mtype( int new_type ){
268 mbuf->mtype = new_type;
272 void xapp::Message::Set_len( int new_len ){
273 if( mbuf != NULL && new_len >= 0 ) {
278 void xapp::Message::Set_subid( int new_subid ){
280 mbuf->sub_id = new_subid;
285 // -------------- send functions ---------------------------------
288 This assumes that the contents of the mbuf were set by either a send attempt that
289 failed with a retry and thus is ready to be processed by RMR.
290 Exposed to the user, but not expected to be frequently used.
292 bool xapp::Message::Send( ) {
296 mbuf = rmr_send_msg( mrc, mbuf ); // send and pick up new mbuf
297 state = mbuf->state == RMR_OK; // overall state for caller
304 Similar to Send(), this assumes that the message is already set up and this is a retry.
305 Exposed to the user, but not expected to be frequently used.
307 bool xapp::Message::Reply( ) {
311 mbuf = rmr_rts_msg( mrc, mbuf ); // send and pick up new mbuf
312 state = mbuf->state == RMR_OK; // state for caller based on send
320 This will setup the message (type etc.) ensure the message payload space is
321 large enough and copy in the payload (if a new payload is given), then will
322 either send or rts the message based on the stype parm.
324 If payload is nil, then we assume the user updated the payload in place and
327 This is public, but most users should use Send_msg or Send_response functions.
329 bool xapp::Message::Send( int mtype, int subid, int payload_len, unsigned char* payload, int stype, rmr_whid_t whid ) {
333 if( mtype != NO_CHANGE ) {
336 if( subid != NO_CHANGE ) {
337 mbuf->sub_id = subid;
340 if( payload_len != NO_CHANGE ) {
341 mbuf->len = payload_len;
344 if( payload != NULL ) { // if we have a payload, ensure msg has room, realloc if needed, then copy
345 mbuf = rmr_realloc_payload( mbuf, payload_len, RMR_NO_COPY, RMR_NO_CLONE ); // ensure message is large enough
350 memcpy( mbuf->payload, payload, mbuf->len );
355 mbuf = rmr_rts_msg( mrc, mbuf );
359 mbuf = rmr_send_msg( mrc, mbuf );
363 mbuf = rmr_wh_send_msg( mrc, whid, mbuf );
367 state = mbuf->state == RMR_OK;
374 Send a response to the endpoint that sent the original message.
376 Response can be null and the assumption will be that the message payload
377 was updated in place and no additional copy is needed before sending the message.
379 The second form of the call allows for a stack allocated buffer (e.g. char foo[120]) to
380 be passed as the payload.
382 bool xapp::Message::Send_response( int mtype, int subid, int response_len, std::shared_ptr<unsigned char> response ) {
383 return Send( mtype, subid, response_len, response.get(), RESPONSE, NO_WHID );
386 bool xapp::Message::Send_response( int mtype, int subid, int response_len, unsigned char* response ) {
387 return Send( mtype, subid, response_len, response, RESPONSE, NO_WHID );
391 These allow a response message to be sent without changing the mtype/subid.
393 bool xapp::Message::Send_response( int response_len, std::shared_ptr<unsigned char> response ) {
394 return Send( NO_CHANGE, NO_CHANGE, response_len, response.get(), RESPONSE, NO_WHID );
397 bool xapp::Message::Send_response( int response_len, unsigned char* response ) {
398 return Send( NO_CHANGE, NO_CHANGE, response_len, response, RESPONSE, NO_WHID );
403 Send a message based on message type routing.
405 Payload can be null and the assumption will be that the message payload
406 was updated in place and no additional copy is needed before sending the message.
408 Return is a new mbuf suitable for sending another message, or the original buffer with
409 a bad state sent if there was a failure.
411 bool xapp::Message::Send_msg( int mtype, int subid, int payload_len, std::shared_ptr<unsigned char> payload ) {
412 return Send( mtype, subid, payload_len, payload.get(), MESSAGE, NO_WHID );
415 bool xapp::Message::Send_msg( int mtype, int subid, int payload_len, unsigned char* payload ) {
416 return Send( mtype, subid, payload_len, payload, MESSAGE, NO_WHID );
420 Similar send functions that allow the message type/subid to remain unchanged
422 bool xapp::Message::Send_msg( int payload_len, std::shared_ptr<unsigned char> payload ) {
423 return Send( NO_CHANGE, NO_CHANGE, payload_len, payload.get(), MESSAGE, NO_WHID );
426 bool xapp::Message::Send_msg( int payload_len, unsigned char* payload ) {
427 return Send( NO_CHANGE, NO_CHANGE, payload_len, payload, MESSAGE, NO_WHID );
432 Wormhole send allows an xAPP to send a message directly based on an existing
433 wormhole ID (use xapp::Wormhole_open() to get one). Wormholes should NOT be
434 used for reponse messages, but are intended for things like route tables and
435 alarm messages where routing doesn't exist/apply.
437 bool xapp::Message::Wormhole_send( int whid, int mtype, int subid, int payload_len, std::shared_ptr<unsigned char> payload ) {
438 return Send( mtype, subid, payload_len, payload.get(), WORMHOLE_MSG, whid );