1: /*************************************************************************
2: * (C) 2010 AITNET ltd - Sofia/Bulgaria - <misho@aitbg.com>
3: * by Michael Pounov <misho@openbsd-bg.org>
4: *
5: * $Author: misho $
6: * $Id: aitrpc.h,v 1.16 2013/07/16 13:04:20 misho Exp $
7: *
8: **************************************************************************
9: The ELWIX and AITNET software is distributed under the following
10: terms:
11:
12: All of the documentation and software included in the ELWIX and AITNET
13: Releases is copyrighted by ELWIX - Sofia/Bulgaria <info@elwix.org>
14:
15: Copyright 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013
16: by Michael Pounov <misho@elwix.org>. All rights reserved.
17:
18: Redistribution and use in source and binary forms, with or without
19: modification, are permitted provided that the following conditions
20: are met:
21: 1. Redistributions of source code must retain the above copyright
22: notice, this list of conditions and the following disclaimer.
23: 2. Redistributions in binary form must reproduce the above copyright
24: notice, this list of conditions and the following disclaimer in the
25: documentation and/or other materials provided with the distribution.
26: 3. All advertising materials mentioning features or use of this software
27: must display the following acknowledgement:
28: This product includes software developed by Michael Pounov <misho@elwix.org>
29: ELWIX - Embedded LightWeight unIX and its contributors.
30: 4. Neither the name of AITNET nor the names of its contributors
31: may be used to endorse or promote products derived from this software
32: without specific prior written permission.
33:
34: THIS SOFTWARE IS PROVIDED BY AITNET AND CONTRIBUTORS ``AS IS'' AND
35: ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
36: IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
37: ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
38: FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
39: DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
40: OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
41: HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
42: LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
43: OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
44: SUCH DAMAGE.
45: */
46: #ifndef __AITRPC_H
47: #define __AITRPC_H
48:
49:
50: #include <assert.h>
51: #include <stdlib.h>
52: #include <string.h>
53: #include <errno.h>
54: #include <sys/types.h>
55: #include <sys/param.h>
56: #if !defined(__NetBSD__)
57: #include <sys/limits.h>
58: #endif
59: #include <sys/socket.h>
60: #include <sys/queue.h>
61: #include <elwix.h>
62: #include <aitsched.h>
63:
64:
65: #define RPC_VERSION 6
66: #define RPC_DEFPORT 2611
67:
68: /* RPC call request flags */
69:
70: #define RPC_REPLY 0x0
71: #define RPC_NOREPLY 0x1
72:
73: /* RPC builtin registed calls */
74:
75: #define CALL_TAG_MAX 65535
76:
77: #define CALL_SRVPING 65534
78:
79: #define CALL_SRVSHUTDOWN 65533
80: #define CALL_SRVCLIENTS 65532
81: #define CALL_SRVCALLS 65531
82: #define CALL_SRVSESSIONS 65530
83:
84: #define CALL_BLOBSHUTDOWN 65529
85: #define CALL_BLOBCLIENTS 65528
86: #define CALL_BLOBVARS 65527
87:
88: /* RPC signals */
89: #define SIGFBLOB 54
90:
91: /* RPC types */
92:
93: typedef enum {
94: ok, error, no, /* for blob reply */
95: get, set, unset /* for blob request */
96: } blob_cmd_type_t;
97:
98:
99: #define RPC_CALLBACK_CHECK_INPUT(x) do { \
100: assert((x)); \
101: if (!(x)) { \
102: rpc_SetErr(EINVAL, \
103: "Invalid callback parameters ..."); \
104: return -1; \
105: } \
106: } while (0)
107:
108:
109: /* RPC session identification */
110:
111: typedef struct {
112: #if BYTE_ORDER == LITTLE_ENDIAN
113: uint16_t sess_instance:8;
114: uint16_t sess_version:8;
115: #endif
116: #if BYTE_ORDER == BIG_ENDIAN
117: uint16_t sess_version:8;
118: uint16_t sess_instance:8;
119: #endif
120: } __packed rpc_sess_t; /* size == 2 bytes */
121:
122:
123: /* Server managment RPC functions ... */
124:
125: /* Network RPC packet - Client request */
126:
127: struct tagRPCCall {
128: rpc_sess_t call_session;
129:
130: uint16_t call_seq;
131: uint16_t call_len;
132: uint16_t call_crc;
133:
134: union {
135: struct {
136: uint64_t flags;
137: } call_req;
138: struct {
139: int32_t ret;
140: int32_t eno;
141: } call_rep;
142: };
143:
144: uint16_t call_tag;
145: uint16_t call_argc;
146: ait_val_t call_argv[0];
147: } __packed; /* size == 20 bytes */
148: #define RPC_CHK_NOREPLY(x) ((x)->call_req.flags & RPC_NOREPLY)
149:
150: /* Network BLOB packet - Header */
151:
152: struct tagBLOBHdr {
153: rpc_sess_t hdr_session;
154: uint8_t hdr_cmd;
155: uint32_t hdr_var;
156: uint32_t hdr_len;
157: uint32_t hdr_ret;
158: uint8_t hdr_pad;
159: } __packed; /* size == 16 bytes */
160:
161: /* Network RPC client & server elements */
162:
163: /* RPC function registration element! */
164: typedef struct tagRPCFunc {
165: ait_val_t func_name;
166:
167: void *func_parent;
168:
169: SLIST_ENTRY(tagRPCFunc) func_next;
170: AVL_ENTRY(tagRPCFunc) func_node;
171: } rpc_func_t;
172: #define RPC_FUNC_SERVER(x) ((rpc_srv_t*) (x)->func_parent)
173:
174: /* Tree root node */
175: typedef struct tagRPCFuncs {
176: pthread_mutex_t mtx;
177:
178: struct tagRPCFunc *slh_first;
179: struct tagRPCFunc *avlh_root;
180: } rpc_funcs_t;
181: #define RPC_FUNCS_LOCK(x) pthread_mutex_lock(&(x)->mtx)
182: #define RPC_FUNCS_UNLOCK(x) pthread_mutex_unlock(&(x)->mtx)
183: #define RPC_FUNCS_ISEMPTY(x) AVL_EMPTY((x))
184:
185:
186: /* BLOB register element */
187: typedef struct tagBLOB {
188: uint32_t blob_var; /* BLOB id */
189:
190: size_t blob_len; /* size of allocated BLOB data */
191: void *blob_data; /* mapped BLOB data */
192:
193: TAILQ_ENTRY(tagBLOB) blob_node;
194: } rpc_blob_t;
195:
196:
197: typedef struct {
198: int cli_id; /* slot id */
199: int cli_sock; /* socket fd */
200: sockaddr_t cli_sa; /* host address */
201: ait_val_t cli_buf; /* network buffer */
202:
203: array_t *cli_vars; /* function return variables */
204:
205: void *cli_parent; /* pointer to parent rpc_srv_t for server or to rpc_sess_t for client */
206: } rpc_cli_t;
207: #define RPC_RETVARS(x) ((x)->cli_vars)
208: #define RPC_SRV_SERVER(x) ((rpc_srv_t*) (x)->cli_parent)
209: #define RPC_CLI_SESSION(x) ((rpc_sess_t*) (x)->cli_parent)
210:
211: typedef struct {
212: rpc_sess_t srv_session; /* RPC session registration info */
213: int srv_netbuf; /* size of network buffer */
214: int srv_proto; /* Server protocol */
215:
216: pthread_t srv_tid; /* RPC exec pthread */
217: sched_root_task_t *srv_root; /* RPC server scheduler */
218: intptr_t srv_kill; /* Scheduler condition variable */
219:
220: rpc_cli_t srv_server; /* RPC server socket */
221: array_t *srv_clients; /* connected rpc client sockets */
222:
223: rpc_funcs_t srv_funcs; /* RPC functions */
224:
225: struct {
226: pthread_t tid; /* BLOB exec pthread */
227: sched_root_task_t *root; /* BLOB server scheduler */
228: intptr_t kill; /* BLOB server state: ==0 disable | !=0 enable */
229:
230: ait_val_t dir; /* BLOB states directory */
231:
232: rpc_cli_t server; /* BLOB server socket */
233: array_t *clients; /* connected blob client sockets */
234:
235: TAILQ_HEAD(, tagBLOB) blobs; /* registered blob variables list */
236: } srv_blob;
237: } rpc_srv_t;
238:
239:
240: /*
241: * (*rpc_callback_t)() - Callback type definition for RPC call in server process
242: *
243: * @arg1 = RPC client
244: * @arg2 = RPC packet header
245: * @arg3 = input array with values from RPC call execution request
246: * return: -1 error or >-1 success execution
247: */
248: typedef int (*rpc_callback_t)(rpc_cli_t *, struct tagRPCCall *, array_t *);
249:
250:
251: /* ----------------------------------------------------------------------- */
252:
253: /* Error support functions */
254:
255: // rpc_GetErrno() Get error code of last operation
256: int rpc_GetErrno();
257: // rpc_GetError() Get error text of last operation
258: const char *rpc_GetError();
259:
260:
261: /*
262: * rpc_chkPktSession() - Check RPC session
263: *
264: * @p = packet session
265: * @s = active session
266: * return: -1, 1, 2, 3 are errors or 0 ok
267: */
268: int rpc_chkPktSession(rpc_sess_t *p, rpc_sess_t *s);
269: /*
270: * rpc_addPktSession() - Prepare session into network format
271: *
272: * @p = packet session
273: * @s = host session
274: * return: -1 error or 0 ok
275: */
276: int rpc_addPktSession(rpc_sess_t *p, rpc_sess_t *s);
277: /*
278: * rpc_register_srvPing() - Register ping service function
279: *
280: * @srv = RPC server instance
281: * return: -1 error or 0 ok
282: */
283: int rpc_register_srvPing(rpc_srv_t * __restrict srv);
284: /*
285: * rpc_register_srvServices() - Register internal service functions
286: *
287: * @srv = RPC server instance
288: * return: -1 error or 0 ok
289: */
290: int rpc_register_srvServices(rpc_srv_t * __restrict srv);
291: /*
292: * rpc_register_blobServices() - Register internal service functions
293: *
294: * @srv = RPC server instance
295: * return: -1 error or 0 ok
296: */
297: int rpc_register_blobServices(rpc_srv_t * __restrict srv);
298:
299:
300: /* RPC Server side functions */
301:
302: /*
303: * rpc_srv_initServer() - Init & create RPC Server
304: *
305: * @InstID = Instance for authentication & recognition
306: * @concurentClients = Concurent clients at same time to this server
307: * @netBuf = Network buffer length (min:512 bytes), if =0 == BUFSIZ (also meaning max RPC packet)
308: * @csHost = Host name or address for bind server, if NULL any address
309: * @Port = Port for bind server, if Port == 0 default port is selected
310: * @proto = Protocol, if == 0 choose SOCK_STREAM
311: * return: NULL == error or !=NULL bind and created RPC server instance
312: */
313: rpc_srv_t *rpc_srv_initServer(unsigned char InstID, int concurentClients, int netBuf,
314: const char *csHost, unsigned short Port, int proto);
315: /*
316: * rpc_srv_endServer() - Destroy RPC server, close all opened sockets and free resources
317: *
318: * @psrv = RPC Server instance
319: * return: none
320: */
321: void rpc_srv_endServer(rpc_srv_t ** __restrict psrv);
322: /*
323: * rpc_srv_loopServer() - Execute Main server loop and wait for clients requests
324: *
325: * @srv = RPC Server instance
326: * return: -1 error or 0 ok, infinite loop ...
327: */
328: int rpc_srv_loopServer(rpc_srv_t * __restrict srv);
329: #define rpc_srv_execServer(_srv, _sync) do { assert((_srv)); \
330: if (!(_srv)->srv_kill) { \
331: pthread_create(&(_srv)->srv_tid, NULL, (void*(*)(void*)) \
332: rpc_srv_loopServer, (_srv)); \
333: if ((_sync)) \
334: pthread_join((_srv)->srv_tid, (void**) (_sync)); \
335: else \
336: pthread_detach((_srv)->srv_tid); \
337: } } while (0)
338:
339: /*
340: * rpc_srv_initBLOBServer() - Init & create BLOB Server
341: *
342: * @srv = RPC server instance
343: * @Port = Port for bind server, if Port == 0 default port is selected
344: * @diskDir = Disk place for BLOB file objects
345: * return: -1 == error or 0 bind and created BLOB server instance
346: */
347: int rpc_srv_initBLOBServer(rpc_srv_t * __restrict srv, unsigned short Port, const char *diskDir);
348: /*
349: * rpc_srv_endBLOBServer() - Destroy BLOB server, close all opened sockets and free resources
350: *
351: * @srv = RPC Server instance
352: * return: none
353: */
354: void rpc_srv_endBLOBServer(rpc_srv_t * __restrict srv);
355: /*
356: * rpc_srv_loopBLOB() - Execute Main BLOB server loop and wait for clients requests
357: *
358: * @srv = RPC Server instance
359: * return: -1 error or 0 ok, infinite loop ...
360: */
361: int rpc_srv_loopBLOBServer(rpc_srv_t * __restrict srv);
362: #define rpc_srv_execBLOBServer(_srv) do { assert((_srv)); \
363: if (!(_srv)->srv_kill && !(_srv)->srv_blob.kill) { \
364: pthread_create(&(_srv)->srv_blob.tid, NULL, \
365: (void*(*)(void*)) \
366: rpc_srv_loopBLOBServer, (_srv)); \
367: pthread_detach((_srv)->srv_blob.tid); \
368: } \
369: } while (0)
370:
371: /*
372: * rpc_srv_registerCall() - Register call to RPC server
373: *
374: * @srv = RPC Server instance
375: * @tag = Function tag
376: * @funcaddr = Function address
377: * return: -1 error, 0 already registered tag or 1 register ok
378: */
379: int rpc_srv_registerCall(rpc_srv_t * __restrict srv, unsigned short tag, void *funcaddr);
380: /*
381: * rpc_srv_unregisterCall() - Unregister call from RPC server
382: *
383: * @srv = RPC Server instance
384: * @tag = Function tag
385: * return: -1 error, 0 not found call, 1 unregister ok
386: */
387: int rpc_srv_unregisterCall(rpc_srv_t * __restrict srv, unsigned short tag);
388: /*
389: * rpc_srv_getCall() - Get registered call from RPC server
390: *
391: * @srv = RPC Server instance
392: * @tag = tag for function
393: * return: NULL not found call, !=NULL return call
394: */
395: rpc_func_t *rpc_srv_getCall(rpc_srv_t * __restrict srv, uint16_t tag);
396: /*
397: * rpc_srv_execCall() Execute registered call from RPC server
398: *
399: * @cli = RPC client
400: * @rpc = IN RPC call structure
401: * @funcname = Execute RPC function
402: * @args = IN RPC calling arguments from RPC client
403: * return: -1 error, !=-1 ok
404: */
405: int rpc_srv_execCall(rpc_cli_t * __restrict cli, struct tagRPCCall * __restrict rpc,
406: ait_val_t funcname, array_t * __restrict args);
407:
408:
409: /*
410: * rpc_srv_blobCreate() - Create and map blob to memory region and return object
411: *
412: * @srv = RPC Server instance
413: * @len = BLOB length object
414: * @tout = BLOB live timeout in seconds
415: * return: NULL error or !=NULL allocated BLOB object
416: */
417: rpc_blob_t *rpc_srv_blobCreate(rpc_srv_t * __restrict srv, int len, int tout);
418: /*
419: * rpc_srv_blobMap() - Map blob to memory region
420: *
421: * @srv = RPC Server instance
422: * @blob = Map to this BLOB element
423: * return: -1 error or 0 ok
424: */
425: int rpc_srv_blobMap(rpc_srv_t * __restrict srv, rpc_blob_t * __restrict blob);
426: /*
427: * rpc_srv_blobUnmap() - Unmap blob memory region
428: *
429: * @blob = Mapped BLOB element
430: * return: none
431: */
432: void rpc_srv_blobUnmap(rpc_blob_t * __restrict blob);
433: /*
434: * rpc_srv_blobFree() - Free blob from disk & memory
435: *
436: * @srv = RPC Server instance
437: * @blob = Mapped BLOB element
438: * return: -1 error or 0 ok
439: */
440: int rpc_srv_blobFree(rpc_srv_t * __restrict srv, rpc_blob_t * __restrict blob);
441:
442: /*
443: * rpc_srv_registerBLOB() - Register new BLOB to server
444: *
445: * @srv = RPC Server instance
446: * @len = BLOB length
447: * @tout = BLOB live timeout in seconds
448: * return: NULL error or new registered BLOB
449: */
450: rpc_blob_t *rpc_srv_registerBLOB(rpc_srv_t * __restrict srv, size_t len, int tout);
451: /*
452: * rpc_srv_unregisterBLOB() - Unregister BLOB from server
453: *
454: * @srv = RPC Server instance
455: * @var = BLOB Variable for unregister
456: * return: -1 error, 0 not found call, 1 unregister ok
457: */
458: int rpc_srv_unregisterBLOB(rpc_srv_t * __restrict srv, uint32_t var);
459: /*
460: * rpc_srv_getBLOB() - Get registered BLOB
461: *
462: * @srv = RPC Server instance
463: * @var = hash for variable
464: * return: NULL not found, !=NULL return blob var
465: */
466: rpc_blob_t *rpc_srv_getBLOB(rpc_srv_t * __restrict srv, uint32_t var);
467:
468: /*
469: * rpc_srv_sendBLOB() - Send mapped BLOB to client
470: *
471: * @cli = Client instance
472: * @blob = Mapped BLOB element
473: * return: -1 error, 0 ok
474: */
475: int rpc_srv_sendBLOB(rpc_cli_t * __restrict cli, rpc_blob_t * __restrict blob);
476: /*
477: * rpc_srv_recvBLOB() - Receive BLOB from client
478: *
479: * @cli = Client instance
480: * @blob = Mapped BLOB element
481: * return: -1 error, 0 ok, >0 unreceived data from client, may be error?
482: */
483: int rpc_srv_recvBLOB(rpc_cli_t * __restrict cli, rpc_blob_t * __restrict blob);
484:
485: /* CLIENT part of functions */
486:
487: /*
488: * rpc_cli_sendBLOB() - Send BLOB to server
489: *
490: * @cli = Client instance
491: * @var = BLOB variable
492: * @data = BLOB data
493: * @tout = BLOB live on server timeout in seconds, if =0 default timeout
494: * return: -1 error, 0 ok, 1 remote error
495: */
496: int rpc_cli_sendBLOB(rpc_cli_t * __restrict cli, ait_val_t * __restrict var,
497: void * __restrict data, int tout);
498: /*
499: * rpc_cli_recvBLOB() - Receive BLOB from server
500: *
501: * @cli = Client instance
502: * @var = BLOB variable
503: * @data = BLOB data, must be e_free after use!
504: * return: -1 error, 0 ok, 1 remote error
505: */
506: int rpc_cli_recvBLOB(rpc_cli_t * __restrict cli, ait_val_t * __restrict var, void ** __restrict data);
507: /*
508: * rpc_cli_delBLOB() - Delete BLOB from server
509: *
510: * @cli = Client instance
511: * @var = BLOB variable
512: * return: -1 error, 0 ok, 1 remote error
513: */
514: int rpc_cli_delBLOB(rpc_cli_t * __restrict cli, ait_val_t * __restrict var);
515: /*
516: * rpc_cli_getBLOB() - Receive BLOB from server and Delete after that.
517: *
518: * @cli = Client instance
519: * @var = BLOB variable
520: * @data = BLOB data, must be e_free after use!
521: * return: -1 error, 0 ok, >0 remote error
522: */
523: int rpc_cli_getBLOB(rpc_cli_t * __restrict cli, ait_val_t * __restrict var,
524: void ** __restrict data);
525:
526:
527: /* RPC Client side functions */
528:
529: /*
530: * rpc_cli_openClient() - Connect to RPC Server
531: *
532: * @InstID = InstID for RPC session request
533: * @netBuf = Network buffer length (min:512 bytes), if =0 == BUFSIZ (also meaning max RPC packet)
534: * @csHost = Host name or IP address for bind server
535: * @Port = Port for bind server, if Port == 0 default port is selected
536: * @proto = Protocol, if == 0 choose SOCK_STREAM
537: * return: NULL == error or !=NULL connection to RPC server established
538: */
539: rpc_cli_t *rpc_cli_openClient(unsigned char InstID, int netBuf,
540: const char *csHost, unsigned short Port, int proto);
541: /*
542: * rpc_cli_closeClient() - Close connection to RPC server and free resources
543: *
544: * @cli = RPC Client session
545: * return: none
546: */
547: void rpc_cli_closeClient(rpc_cli_t ** __restrict cli);
548: /*
549: * rpc_pkt_Send() - Send RPC packet
550: *
551: * @sock = Socket
552: * @type = Type of socket
553: * @sa = Server address
554: * @pkt = RPC packet
555: * @len = Length of packet
556: * return: -1 error or !=-1 sended bytes
557: */
558: int rpc_pkt_Send(int sock, int type, sockaddr_t * __restrict sa,
559: ait_val_t * __restrict pkt, int len);
560: /*
561: * rpc_pkt_Receive() - Receive RPC packet
562: *
563: * @sock = Socket
564: * @type = Type of socket
565: * @sa = Server address
566: * @pkt = RPC packet
567: * return: -1 error or !=-1 sended bytes
568: */
569: int rpc_pkt_Receive(int sock, int type, sockaddr_t * __restrict sa,
570: ait_val_t * __restrict pkt);
571: /*
572: * rpc_pkt_Request() - Build RPC Request packet
573: *
574: * @pkt = Packet buffer
575: * @sess = RPC session info
576: * @tag = Function tag for execution
577: * @vars = Function argument array of values, may be NULL
578: * @noreply = We not want RPC reply
579: * @nocrc = Without CRC calculation
580: * return: -1 error or != -1 prepared bytes into packet
581: */
582: int rpc_pkt_Request(ait_val_t * __restrict pkt, rpc_sess_t * __restrict sess,
583: unsigned short tag, array_t * __restrict vars, int noreply, int nocrc);
584: /*
585: * rpc_pkt_Replay() - Decode RPC Replay packet
586: *
587: * @pkt = Packet buffer
588: * @sess = RPC session info
589: * @tag = Function tag
590: * @vars = Function argument array of values, may be NULL
591: * @nocrc = Without CRC calculation
592: * return: -1 error or != -1 return value from function
593: */
594: int rpc_pkt_Replay(ait_val_t * __restrict pkt, rpc_sess_t * __restrict sess,
595: unsigned short tag, array_t ** __restrict vars, int nocrc);
596: /*
597: * rpc_cli_execCall() - Execute RPC call
598: *
599: * @cli = RPC Client session
600: * @noreply = We not want RPC reply
601: * @tag = Function tag for execution
602: * @in_vars = IN function argument array of values, may be NULL
603: * @out_vars = OUT returned array of rpc values, if !=NULL must be free after use with ait_freeVars()
604: * return: -1 error or != -1 ok result
605: */
606: int rpc_cli_execCall(rpc_cli_t *cli, int noreply, unsigned short tag,
607: array_t * __restrict in_vars, array_t ** __restrict out_vars);
608: /*
609: * rpc_cli_freeCall() - Free resouce allocated by RPC call
610: *
611: * @out_vars = Returned array with variables from RPC call
612: * return: none
613: */
614: void rpc_cli_freeCall(array_t ** __restrict out_vars);
615: /*
616: * rpc_cli_ping() - Ping RPC server
617: *
618: * @cli = connected client
619: * return: -1 error or !=-1 ping seq id
620: */
621: int rpc_cli_ping(rpc_cli_t *cli);
622:
623:
624: /*
625: * rpc_cli_openBLOBClient() - Connect to BLOB Server
626: *
627: * @rpccli = RPC Client session
628: * @Port = Port for bind server, if Port == 0 default port is selected
629: * return: NULL == error or !=NULL connection to BLOB server established
630: */
631: rpc_cli_t *rpc_cli_openBLOBClient(rpc_cli_t * __restrict rpccli, unsigned short Port);
632: /*
633: * rpc_cli_closeBLOBClient() - Close connection to BLOB server and free resources
634: *
635: * @cli = BLOB Client session
636: * return: none
637: */
638: void rpc_cli_closeBLOBClient(rpc_cli_t ** __restrict cli);
639:
640:
641: #endif
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