1 // vim: ts=4 sw=4 noet :
3 ==================================================================================
4 Copyright (c) 2019 Nokia
5 Copyright (c) 2018-2019 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
17 limitations under the License.
18 ==================================================================================
22 Mnemonic: sr_nng_static.c
23 Abstract: These are static send/receive primatives which (sadly)
24 differ based on the underlying protocol (nng vs nanomsg).
25 Split from rmr_nng.c for easier wormhole support.
27 Author: E. Scott Daniels
28 Date: 13 February 2019
31 #ifndef _sr_nng_static_c
32 #define _sr_nng_static_c
35 #include <nng/protocol/pubsub0/pub.h>
36 #include <nng/protocol/pubsub0/sub.h>
37 #include <nng/protocol/pipeline0/push.h>
38 #include <nng/protocol/pipeline0/pull.h>
41 Translates the nng state passed in to one of ours that is suitable to put
42 into the message, and sets errno to something that might be useful.
43 If we don't have a specific RMr state, then we return the default (e.g.
46 The addition of the connection shut error code to the switch requires
47 that the NNG version at commit e618abf8f3db2a94269a (or after) be
48 used for compiling RMR.
50 static inline int xlate_nng_state( int state, int def_state ) {
58 case NNG_EAGAIN: // soft errors get retry as the RMr error
59 state = RMR_ERR_RETRY;
64 state = RMR_ERR_RETRY;
84 errno = EBADFD; // file des not in a good state for the operation
88 case NNG_ECONNSHUT: // new error with nng commit e618abf8f3db2a94269a79c8901a51148d48fcc2 (Sept 2019)
90 errno = EBADFD; // file des not in a good state for the operation
104 Alloc a new nano zero copy buffer and put into msg. If msg is nil, then we will alloc
105 a new message struct as well. Size is the size of the zc buffer to allocate (not
106 including our header). If size is 0, then the buffer allocated is the size previously
107 allocated (if msg is !nil) or the default size given at initialisation).
109 The trlo (trace data lengh override) is used for trace length if >0. If <= 0, then
110 the context value is used.
112 NOTE: while accurate, the nng doc implies that both the msg buffer and data buffer
113 are zero copy, however ONLY the message is zero copy. We now allocate and use
116 static rmr_mbuf_t* alloc_zcmsg( uta_ctx_t* ctx, rmr_mbuf_t* msg, int size, int state, int trlo ) {
117 size_t mlen; // size of the transport buffer that we'll allocate
118 uta_mhdr_t* hdr; // convenience pointer
119 int tr_len; // trace data len (default or override)
121 tr_len = trlo > 0 ? trlo : ctx->trace_data_len;
123 mlen = sizeof( uta_mhdr_t ) + tr_len + ctx->d1_len + ctx->d2_len; // start with header and trace/data lengths
124 mlen += (size > 0 ? size : ctx->max_plen); // add user requested size or size set during init
127 msg = (rmr_mbuf_t *) malloc( sizeof *msg );
129 fprintf( stderr, "[CRI] rmr_alloc_zc: cannot get memory for message\n" );
133 mlen = msg->alloc_len; // msg given, allocate the same size as before
136 memset( msg, 0, sizeof( *msg ) );
138 if( (state = nng_msg_alloc( (nng_msg **) &msg->tp_buf, mlen )) != 0 ) {
139 fprintf( stderr, "[CRI] rmr_alloc_zc: cannot get memory for zero copy buffer: %d\n", ENOMEM );
140 abort( ); // toss out a core file for this
143 msg->header = nng_msg_body( msg->tp_buf );
144 memset( msg->header, 0, sizeof( uta_mhdr_t ) ); // ensure no junk in the header area
145 if( (hdr = (uta_mhdr_t *) msg->header) != NULL ) {
146 hdr->rmr_ver = htonl( RMR_MSG_VER ); // set current version
147 hdr->sub_id = htonl( UNSET_SUBID );
148 SET_HDR_LEN( hdr ); // ensure these are converted to net byte order
149 SET_HDR_TR_LEN( hdr, ctx->trace_data_len );
150 SET_HDR_D1_LEN( hdr, ctx->d1_len );
151 //SET_HDR_D2_LEN( hdr, ctx->d2_len ); // future
153 msg->len = 0; // length of data in the payload
154 msg->alloc_len = mlen; // length of allocated transport buffer
155 msg->sub_id = UNSET_SUBID;
156 msg->mtype = UNSET_MSGTYPE;
157 msg->payload = PAYLOAD_ADDR( hdr ); // point to payload (past all header junk)
158 msg->xaction = ((uta_mhdr_t *)msg->header)->xid; // point at transaction id in header area
159 msg->state = state; // fill in caller's state (likely the state of the last operation)
160 msg->flags |= MFL_ZEROCOPY; // this is a zerocopy sendable message
161 strncpy( (char *) ((uta_mhdr_t *)msg->header)->src, ctx->my_name, RMR_MAX_SRC );
162 strncpy( (char *) ((uta_mhdr_t *)msg->header)->srcip, ctx->my_ip, RMR_MAX_SRC );
164 if( DEBUG > 1 ) fprintf( stderr, "[DBUG] alloc_zcmsg mlen=%ld size=%d mpl=%d flags=%02x\n", (long) mlen, size, ctx->max_plen, msg->flags );
170 Allocates only the mbuf and does NOT allocate an underlying transport buffer since
171 NNG receive must allocate that on its own.
173 static rmr_mbuf_t* alloc_mbuf( uta_ctx_t* ctx, int state ) {
175 uta_mhdr_t* hdr; // convenience pointer
178 msg = (rmr_mbuf_t *) malloc( sizeof *msg );
180 fprintf( stderr, "[CRI] rmr_alloc_zc: cannot get memory for message\n" );
184 memset( msg, 0, sizeof( *msg ) );
186 msg->sub_id = UNSET_SUBID;
187 msg->mtype = UNSET_MSGTYPE;
190 msg->len = -1; // no payload; invalid len
194 msg->state = RMR_ERR_UNSET;
201 This accepts a message with the assumption that only the tp_buf pointer is valid. It
202 sets all of the various header/payload/xaction pointers in the mbuf to the proper
203 spot in the transport layer buffer. The len in the header is assumed to be the
204 allocated len (a receive buffer that nng created);
206 The alen parm is the assumed allocated length; assumed because it's a value likely
207 to have come from nng receive and the actual alloc len might be larger, but we
208 can only assume this is the total usable space.
210 This function returns the message with an error state set if it detects that the
211 received message might have been truncated. Check is done here as the calculation
212 is somewhat based on header version.
214 static void ref_tpbuf( rmr_mbuf_t* msg, size_t alen ) {
215 uta_mhdr_t* hdr = NULL; // current header
216 uta_v1mhdr_t* v1hdr; // version 1 header
218 int hlen; // header len to use for a truncation check
220 msg->header = nng_msg_body( msg->tp_buf ); // header is the start of the transport buffer
221 v1hdr = (uta_v1mhdr_t *) msg->header; // v1 will always allow us to suss out the version
223 if( v1hdr->rmr_ver == 1 ) { // bug in verion 1 didn't encode the version in network byte order
225 v1hdr->rmr_ver = htonl( 1 ); // save it correctly in case we clone the message
227 ver = ntohl( v1hdr->rmr_ver );
232 msg->len = ntohl( v1hdr->plen ); // length sender says is in the payload (received length could be larger)
233 msg->alloc_len = alen; // length of whole tp buffer (including header, trace and data bits)
234 msg->payload = msg->header + sizeof( uta_v1mhdr_t ); // point past header to payload (single buffer allocation above)
236 msg->xaction = &v1hdr->xid[0]; // point at transaction id in header area
237 msg->flags |= MFL_ZEROCOPY; // this is a zerocopy sendable message
238 msg->mtype = ntohl( v1hdr->mtype ); // capture and convert from network order to local order
239 msg->sub_id = UNSET_SUBID; // type 1 messages didn't have this
241 hlen = sizeof( uta_v1mhdr_t );
244 default: // current version always lands here
245 hdr = (uta_mhdr_t *) msg->header;
246 msg->len = ntohl( hdr->plen ); // length sender says is in the payload (received length could be larger)
247 msg->alloc_len = alen; // length of whole tp buffer (including header, trace and data bits)
249 msg->payload = PAYLOAD_ADDR( hdr ); // at user payload
250 msg->xaction = &hdr->xid[0]; // point at transaction id in header area
251 msg->flags |= MFL_ZEROCOPY; // this is a zerocopy sendable message
252 msg->mtype = ntohl( hdr->mtype ); // capture and convert from network order to local order
253 msg->sub_id = ntohl( hdr->sub_id );
254 hlen = RMR_HDR_LEN( hdr ); // len to use for truncated check later
258 if( msg->len > (msg->alloc_len - hlen ) ) {
259 msg->state = RMR_ERR_TRUNC;
260 msg->len = msg->alloc_len - hlen; // adjust len down so user app doesn't overrun
267 This will clone a message into a new zero copy buffer and return the cloned message.
269 static inline rmr_mbuf_t* clone_msg( rmr_mbuf_t* old_msg ) {
270 rmr_mbuf_t* nm; // new message buffer
276 nm = (rmr_mbuf_t *) malloc( sizeof *nm );
278 fprintf( stderr, "[CRI] rmr_clone: cannot get memory for message buffer\n" );
281 memset( nm, 0, sizeof( *nm ) );
283 mlen = old_msg->alloc_len; // length allocated before
284 if( (state = nng_msg_alloc( (nng_msg **) &nm->tp_buf, mlen )) != 0 ) {
285 fprintf( stderr, "[CRI] rmr_clone: cannot get memory for zero copy buffer: %d\n", ENOMEM );
289 nm->header = nng_msg_body( nm->tp_buf ); // set and copy the header from old message
290 v1hdr = (uta_v1mhdr_t *) old_msg->header; // v1 will work to dig header out of any version
291 switch( ntohl( v1hdr->rmr_ver ) ) {
293 memcpy( v1hdr, old_msg->header, sizeof( *v1hdr ) ); // copy complete header
294 nm->payload = (void *) v1hdr + sizeof( *v1hdr );
297 default: // current message always caught here
299 memcpy( hdr, old_msg->header, RMR_HDR_LEN( old_msg->header ) + RMR_TR_LEN( old_msg->header ) + RMR_D1_LEN( old_msg->header ) + RMR_D2_LEN( old_msg->header )); // copy complete header, trace and other data
300 nm->payload = PAYLOAD_ADDR( hdr ); // at user payload
304 // --- these are all version agnostic -----------------------------------
305 nm->mtype = old_msg->mtype;
306 nm->sub_id = old_msg->sub_id;
307 nm->len = old_msg->len; // length of data in the payload
308 nm->alloc_len = mlen; // length of allocated payload
310 nm->xaction = hdr->xid; // reference xaction
311 nm->state = old_msg->state; // fill in caller's state (likely the state of the last operation)
312 nm->flags = old_msg->flags | MFL_ZEROCOPY; // this is a zerocopy sendable message
313 memcpy( nm->payload, old_msg->payload, old_msg->len );
319 This will clone a message with a change to the trace area in the header such that
320 it will be tr_len passed in. The trace area in the cloned message will be uninitialised.
321 The orignal message will be left unchanged, and a pointer to the new message is returned.
322 It is not possible to realloc buffers and change the data sizes.
324 static inline rmr_mbuf_t* realloc_msg( rmr_mbuf_t* old_msg, int tr_len ) {
325 rmr_mbuf_t* nm; // new message buffer
330 int tr_old_len; // tr size in new buffer
332 nm = (rmr_mbuf_t *) malloc( sizeof *nm );
334 fprintf( stderr, "[CRI] rmr_clone: cannot get memory for message buffer\n" );
337 memset( nm, 0, sizeof( *nm ) );
339 hdr = old_msg->header;
340 tr_old_len = RMR_TR_LEN( hdr ); // bytes in old header for trace
342 mlen = old_msg->alloc_len + (tr_len - tr_old_len); // new length with trace adjustment
343 if( DEBUG ) fprintf( stderr, "[DBUG] tr_realloc old size=%d new size=%d new tr_len=%d\n", (int) old_msg->alloc_len, (int) mlen, (int) tr_len );
344 if( (state = nng_msg_alloc( (nng_msg **) &nm->tp_buf, mlen )) != 0 ) {
345 fprintf( stderr, "[CRI] rmr_clone: cannot get memory for zero copy buffer: %d\n", ENOMEM );
349 nm->header = nng_msg_body( nm->tp_buf ); // set and copy the header from old message
350 v1hdr = (uta_v1mhdr_t *) old_msg->header; // v1 will work to dig header out of any version
351 switch( ntohl( v1hdr->rmr_ver ) ) {
353 memcpy( v1hdr, old_msg->header, sizeof( *v1hdr ) ); // copy complete header
354 nm->payload = (void *) v1hdr + sizeof( *v1hdr );
357 default: // current message version always caught here
359 memcpy( hdr, old_msg->header, sizeof( uta_mhdr_t ) ); // ONLY copy the header portion; trace and data offsets might have changed
360 SET_HDR_TR_LEN( hdr, tr_len ); // must adjust trace len in new message before copy
362 if( RMR_D1_LEN( hdr ) ) {
363 memcpy( DATA1_ADDR( hdr ), DATA1_ADDR( old_msg->header), RMR_D1_LEN( hdr ) ); // copy data1 and data2 if necessary
365 if( RMR_D2_LEN( hdr ) ) {
366 memcpy( DATA2_ADDR( hdr ), DATA2_ADDR( old_msg->header), RMR_D2_LEN( hdr ) );
369 nm->payload = PAYLOAD_ADDR( hdr ); // directly at the payload
373 // --- these are all version agnostic -----------------------------------
374 nm->mtype = old_msg->mtype;
375 nm->sub_id = old_msg->sub_id;
376 nm->len = old_msg->len; // length of data in the payload
377 nm->alloc_len = mlen; // length of allocated payload
379 nm->xaction = hdr->xid; // reference xaction
380 nm->state = old_msg->state; // fill in caller's state (likely the state of the last operation)
381 nm->flags = old_msg->flags | MFL_ZEROCOPY; // this is a zerocopy sendable message
382 memcpy( nm->payload, old_msg->payload, old_msg->len );
388 This is the receive work horse used by the outer layer receive functions.
389 It waits for a message to be received on our listen socket. If old msg
390 is passed in, the we assume we can use it instead of allocating a new
391 one, else a new block of memory is allocated.
393 This allocates a zero copy message so that if the user wishes to call
394 rmr_rts_msg() the send is zero copy.
396 The nng timeout on send is at the ms level which is a tad too long for
397 our needs. So, if NNG returns eagain or timedout (we don't set one)
398 we will loop up to 5 times with a 10 microsecond delay between each
399 attempt. If at the end of this set of retries NNG is still saying
400 eagain/timeout we'll return to the caller with that set in errno.
401 Right now this is only for zero-copy buffers (they should all be zc
405 In the NNG msg world it must allocate the receive buffer rather
406 than accepting one that we allocated from their space and could
407 reuse. They have their reasons I guess. Thus, we will free
408 the old transport buffer if user passes the message in; at least
409 our mbuf will be reused.
411 When msg->state is not ok, this function must set tp_state in the message as some API
412 fucntions return the message directly and do not propigate errno into the message.
414 static rmr_mbuf_t* rcv_msg( uta_ctx_t* ctx, rmr_mbuf_t* old_msg ) {
416 rmr_mbuf_t* msg = NULL; // msg received
418 size_t rsize; // nng needs to write back the size received... grrr
422 if( msg->tp_buf != NULL ) {
423 nng_msg_free( msg->tp_buf );
428 msg = alloc_mbuf( ctx, RMR_OK ); // msg without a transport buffer
437 msg->state = nng_recvmsg( ctx->nn_sock, (nng_msg **) &msg->tp_buf, NO_FLAGS ); // blocks hard until received
438 if( (msg->state = xlate_nng_state( msg->state, RMR_ERR_RCVFAILED )) != RMR_OK ) {
439 msg->tp_state = errno;
444 if( msg->tp_buf == NULL ) { // if state is good this _should_ not be nil, but parninoia says check anyway
445 msg->state = RMR_ERR_EMPTY;
450 rsize = nng_msg_len( msg->tp_buf );
451 if( rsize >= sizeof( uta_v1mhdr_t ) ) { // we need at least a full type 1 (smallest) header here
452 ref_tpbuf( msg, rsize ); // point payload, header etc to the data and set trunc error if needed
453 hdr = (uta_mhdr_t *) msg->header;
454 msg->flags |= MFL_ADDSRC; // turn on so if user app tries to send this buffer we reset src
456 if( DEBUG > 1 ) fprintf( stderr, "[DBUG] rcv_msg: got something: type=%d state=%d len=%d diff=%ld\n",
457 msg->mtype, msg->state, msg->len, msg->payload - (unsigned char *) msg->header );
459 msg->state = RMR_ERR_EMPTY;
462 msg->alloc_len = rsize;
465 msg->flags |= MFL_ZEROCOPY; // this is a zerocopy sendable message
466 msg->mtype = UNSET_MSGTYPE;
467 msg->sub_id = UNSET_SUBID;
474 Receives a 'raw' message from a non-RMr sender (no header expected). The returned
475 message buffer cannot be used to send, and the length information may or may
476 not be correct (it is set to the length received which might be more than the
477 bytes actually in the payload).
479 Mostly this supports the route table collector, but could be extended with an
480 API external function.
482 static void* rcv_payload( uta_ctx_t* ctx, rmr_mbuf_t* old_msg ) {
484 rmr_mbuf_t* msg = NULL; // msg received
485 size_t rsize; // nng needs to write back the size received... grrr
490 msg = alloc_zcmsg( ctx, NULL, RMR_MAX_RCV_BYTES, RMR_OK, DEF_TR_LEN ); // will abort on failure, no need to check
493 msg->state = nng_recvmsg( ctx->nn_sock, (nng_msg **) &msg->tp_buf, NO_FLAGS ); // blocks hard until received
494 if( (msg->state = xlate_nng_state( msg->state, RMR_ERR_RCVFAILED )) != RMR_OK ) {
497 rsize = nng_msg_len( msg->tp_buf );
499 // do NOT use ref_tpbuf() here! Must fill these in manually.
500 msg->header = nng_msg_body( msg->tp_buf );
501 msg->len = rsize; // len is the number of bytes received
502 msg->alloc_len = rsize;
503 msg->mtype = UNSET_MSGTYPE; // raw message has no type
504 msg->sub_id = UNSET_SUBID; // nor a subscription id
506 msg->flags = MFL_RAW;
507 msg->payload = msg->header; // payload is the whole thing; no header
510 if( DEBUG > 1 ) fprintf( stderr, "[DBUG] rcv_payload: got something: type=%d state=%d len=%d\n", msg->mtype, msg->state, msg->len );
516 This does the hard work of actually sending the message to the given socket. On success,
517 a new message struct is returned. On error, the original msg is returned with the state
518 set to a reasonable value. If the message being sent as MFL_NOALLOC set, then a new
519 buffer will not be allocated and returned (mostly for call() interal processing since
520 the return message from call() is a received buffer, not a new one).
522 Called by rmr_send_msg() and rmr_rts_msg(), etc. and thus we assume that all pointer
523 validation has been done prior.
525 When msg->state is not ok, this function must set tp_state in the message as some API
526 fucntions return the message directly and do not propigate errno into the message.
528 static rmr_mbuf_t* send_msg( uta_ctx_t* ctx, rmr_mbuf_t* msg, nng_socket nn_sock, int retries ) {
531 int nng_flags = NNG_FLAG_NONBLOCK; // if we need to set any nng flags (zc buffer) add it to this
532 int spin_retries = 1000; // if eagain/timeout we'll spin, at max, this many times before giving up the CPU
533 int tr_len; // trace len in sending message so we alloc new message with same trace sizes
535 // future: ensure that application did not overrun the XID buffer; last byte must be 0
537 hdr = (uta_mhdr_t *) msg->header;
538 hdr->mtype = htonl( msg->mtype ); // stash type/len/sub_id in network byte order for transport
539 hdr->sub_id = htonl( msg->sub_id );
540 hdr->plen = htonl( msg->len );
541 tr_len = RMR_TR_LEN( hdr ); // snarf trace len before sending as hdr is invalid after send
543 if( msg->flags & MFL_ADDSRC ) { // buffer was allocated as a receive buffer; must add our source
544 strncpy( (char *) ((uta_mhdr_t *)msg->header)->src, ctx->my_name, RMR_MAX_SRC ); // must overlay the source to be ours
545 strncpy( (char *) ((uta_mhdr_t *)msg->header)->srcip, ctx->my_ip, RMR_MAX_SRC );
555 if( msg->flags & MFL_ZEROCOPY ) { // faster sending with zcopy buffer
557 if( (state = nng_sendmsg( nn_sock, (nng_msg *) msg->tp_buf, nng_flags )) != 0 ) { // must check and retry some if transient failure
559 if( retries > 0 && (state == NNG_EAGAIN || state == NNG_ETIMEDOUT) ) {
560 if( --spin_retries <= 0 ) { // don't give up the processor if we don't have to
562 if( retries > 0 ) { // only if we'll loop through again
563 usleep( 1 ); // sigh, give up the cpu and hope it's just 1 miscrosec
568 state = 0; // don't loop
569 //if( DEBUG ) fprintf( stderr, ">>>>> send failed: %s\n", nng_strerror( state ) );
574 msg->header = NULL; // nano frees; don't risk accessing later by mistake
578 } while( state && retries > 0 );
580 // future: this should not happen as all buffers we deal with are zc buffers; might make sense to remove the test and else
581 msg->state = RMR_ERR_SENDFAILED;
583 msg->tp_state = errno;
587 if( (state = nng_send( nn_sock, msg->header, sizeof( uta_mhdr_t ) + msg->len, nng_flags )) != 0 ) {
589 //if( DEBUG ) fprintf( stderr, ">>>>> copy buffer send failed: %s\n", nng_strerror( state ) );
594 if( msg->state == RMR_OK ) { // successful send
595 if( !(msg->flags & MFL_NOALLOC) ) { // allocate another sendable zc buffer unless told otherwise
596 return alloc_zcmsg( ctx, msg, 0, RMR_OK, tr_len ); // preallocate a zero-copy buffer and return msg
598 rmr_free_msg( msg ); // not wanting a meessage back, trash this one
601 } else { // send failed -- return original message
602 if( msg->state == NNG_EAGAIN || msg->state == NNG_ETIMEDOUT ) {
604 msg->state = RMR_ERR_RETRY; // errno will have nano reason
606 msg->state = xlate_nng_state( msg->state, RMR_ERR_SENDFAILED ); // xlate to our state and set errno
609 if( DEBUG ) fprintf( stderr, "[DBUG] send failed: %d %s\n", (int) msg->state, strerror( msg->state ) );
616 send message with maximum timeout.
617 Accept a message and send it to an endpoint based on message type.
618 If NNG reports that the send attempt timed out, or should be retried,
619 RMr will retry for approximately max_to microseconds; rounded to the next
622 Allocates a new message buffer for the next send. If a message type has
623 more than one group of endpoints defined, then the message will be sent
624 in round robin fashion to one endpoint in each group.
626 An endpoint will be looked up in the route table using the message type and
627 the subscription id. If the subscription id is "UNSET_SUBID", then only the
628 message type is used. If the initial lookup, with a subid, fails, then a
629 second lookup using just the mtype is tried.
631 When msg->state is not OK, this function must set tp_state in the message as
632 some API fucntions return the message directly and do not propigate errno into
635 CAUTION: this is a non-blocking send. If the message cannot be sent, then
636 it will return with an error and errno set to eagain. If the send is
637 a limited fanout, then the returned status is the status of the last
641 static rmr_mbuf_t* mtosend_msg( void* vctx, rmr_mbuf_t* msg, int max_to ) {
642 endpoint_t* ep; // end point that we're attempting to send to
643 rtable_ent_t* rte; // the route table entry which matches the message key
644 nng_socket nn_sock; // endpoint socket for send
646 int group; // selected group to get socket for
647 int send_again; // true if the message must be sent again
648 rmr_mbuf_t* clone_m; // cloned message for an nth send
649 int sock_ok; // got a valid socket from round robin select
651 int ok_sends = 0; // track number of ok sends
653 if( (ctx = (uta_ctx_t *) vctx) == NULL || msg == NULL ) { // bad stuff, bail fast
654 errno = EINVAL; // if msg is null, this is their clue
656 msg->state = RMR_ERR_BADARG;
657 errno = EINVAL; // must ensure it's not eagain
658 msg->tp_state = errno;
663 errno = 0; // clear; nano might set, but ensure it's not left over if it doesn't
664 if( msg->header == NULL ) {
665 fprintf( stderr, "rmr_mtosend_msg: ERROR: message had no header\n" );
666 msg->state = RMR_ERR_NOHDR;
667 errno = EBADMSG; // must ensure it's not eagain
668 msg->tp_state = errno;
673 max_to = ctx->send_retries; // convert to retries
676 if( (rte = uta_get_rte( ctx->rtable, msg->sub_id, msg->mtype, TRUE )) == NULL ) { // find the entry which matches subid/type allow fallback to type only key
677 if( ctx->flags & CTXFL_WARN ) {
678 fprintf( stderr, "[WARN] no endpoint for mtype=%d sub_id=%d\n", msg->mtype, msg->sub_id );
680 msg->state = RMR_ERR_NOENDPT;
681 errno = ENXIO; // must ensure it's not eagain
682 msg->tp_state = errno;
683 return msg; // caller can resend (maybe) or free
686 send_again = 1; // force loop entry
687 group = 0; // always start with group 0
688 while( send_again ) {
689 sock_ok = uta_epsock_rr( rte, group, &send_again, &nn_sock, &ep ); // select endpt from rr group and set again if more groups
691 if( DEBUG ) fprintf( stderr, "[DBUG] mtosend_msg: flgs=0x%04x type=%d again=%d group=%d len=%d sock_ok=%d\n",
692 msg->flags, msg->mtype, send_again, group, msg->len, sock_ok );
696 if( sock_ok ) { // with an rte we _should_ always have a socket, but don't bet on it
698 clone_m = clone_msg( msg ); // must make a copy as once we send this message is not available
699 if( clone_m == NULL ) {
700 msg->state = RMR_ERR_SENDFAILED;
702 msg->tp_state = errno;
703 if( ctx->flags & CTXFL_WARN ) {
704 fprintf( stderr, "[WARN] unable to clone message for multiple rr-group send\n" );
709 if( DEBUG ) fprintf( stderr, "[DBUG] msg cloned: type=%d len=%d\n", msg->mtype, msg->len );
710 msg->flags |= MFL_NOALLOC; // keep send from allocating a new message; we have a clone to use
711 msg = send_msg( ctx, msg, nn_sock, max_to ); // do the hard work, msg should be nil on success
713 if( msg != NULL ) { // returned message indicates send error of some sort
714 rmr_free_msg( msg ); // must ditchone; pick msg so we don't have to unfiddle flags
718 msg = clone_m; // clone will be the next to send
721 msg = send_msg( ctx, msg, nn_sock, max_to ); // send the last, and allocate a new buffer; drops the clone if it was
724 fprintf( stderr, "[DBUG] mtosend_msg: send returned nil message!\n" );
729 if( ep != NULL && msg != NULL ) {
730 switch( msg->state ) {
732 ep->scounts[EPSC_GOOD]++;
736 ep->scounts[EPSC_TRANS]++;
740 ep->scounts[EPSC_FAIL]++;
745 if( ctx->flags & CTXFL_WARN ) {
746 fprintf( stderr, "[WARN] invalid socket for rte, setting no endpoint err: mtype=%d sub_id=%d\n", msg->mtype, msg->sub_id );
748 msg->state = RMR_ERR_NOENDPT;
753 if( msg ) { // call functions don't get a buffer back, so a nil check is required
754 msg->flags &= ~MFL_NOALLOC; // must return with this flag off
755 if( ok_sends ) { // multiple rr-groups and one was successful; report ok
759 if( DEBUG ) fprintf( stderr, "[DBUG] final send stats: ok=%d group=%d state=%d\n\n", ok_sends, group, msg->state );
761 msg->tp_state = errno;
764 return msg; // last message caries the status of last/only send attempt
769 A generic wrapper to the real send to keep wormhole stuff agnostic.
770 We assume the wormhole function vetted the buffer so we don't have to.
772 static rmr_mbuf_t* send2ep( uta_ctx_t* ctx, endpoint_t* ep, rmr_mbuf_t* msg ) {
773 return send_msg( ctx, msg, ep->nn_sock, -1 );