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 1.24.2.3 2014/11/17 23:51:26 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 - 2014
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 7
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: uint32_t call_len;
131: uint16_t call_crc;
132:
133: union {
134: struct {
135: uint64_t flags;
136: } call_req;
137: struct {
138: int32_t ret;
139: int32_t eno;
140: } call_rep;
141: };
142:
143: uint16_t call_tag;
144: uint16_t call_argc;
145: ait_val_t call_argv[0];
146: } __packed; /* size == 20 bytes */
147: #define RPC_CHK_NOREPLY(x) (ntohl((u_long) (x)->call_req.flags) & RPC_NOREPLY)
148: #define RPC_SET_ERRNO(x, _v) ((x)->call_rep.eno = htonl((_v)))
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: #define RPC_CALL_DEFINE(x) int (x)(rpc_cli_t*, struct tagRPCCall*, array_t*)
251: #define RPC_CALL_ARGS(arg1, arg2, arg3) rpc_cli_t* arg1, struct tagRPCCall* arg2, array_t* arg3
252: #define RPC_CALL_STDARGS RPC_CALL_ARGS(cli, rpc, iv)
253:
254:
255: /* ----------------------------------------------------------------------- */
256:
257: /* Error support functions */
258:
259: // rpc_GetErrno() Get error code of last operation
260: int rpc_GetErrno();
261: // rpc_GetError() Get error text of last operation
262: const char *rpc_GetError();
263: // rpc_SetErr() Set error to variables for internal use!!!
264: void rpc_SetErr(int eno, char *estr, ...);
265:
266:
267:
268: /*
269: * rpc_Read() - RPC read operation
270: *
271: * @sock = socket
272: * @type = type of socket
273: * @flags = receive flags
274: * @sa = check client address, if you use udp protocol
275: * @buf = buffer
276: * @blen = buffer length
277: * return: -1 error, 0 EOF or or >0 readed bytes into buffer
278: */
279: ssize_t rpc_Read(int sock, int type, int flags, sockaddr_t * __restrict sa,
280: unsigned char * __restrict buf, size_t blen);
281: /*
282: * rpc_Write() - RPC write operation
283: *
284: * @sock = socket
285: * @type = type of socket
286: * @flags = send flags
287: * @sa = send to client address, if you use udp protocol
288: * @buf = buffer
289: * @blen = buffer length
290: * return: -1 error, 0 EOF or >0 written bytes into buffer
291: */
292: ssize_t rpc_Write(int sock, int type, int flags, sockaddr_t * __restrict sa,
293: unsigned char * __restrict buf, size_t blen);
294:
295: /*
296: * rpc_chkPktSession() - Check RPC session
297: *
298: * @p = packet session
299: * @s = active session
300: * return: -1, 1, 2, 3 are errors or 0 ok
301: */
302: int rpc_chkPktSession(rpc_sess_t *p, rpc_sess_t *s);
303: /*
304: * rpc_addPktSession() - Prepare session into network format
305: *
306: * @p = packet session
307: * @s = host session
308: * return: -1 error or 0 ok
309: */
310: int rpc_addPktSession(rpc_sess_t *p, rpc_sess_t *s);
311: /*
312: * rpc_register_srvPing() - Register ping service function
313: *
314: * @srv = RPC server instance
315: * return: -1 error or 0 ok
316: */
317: int rpc_register_srvPing(rpc_srv_t * __restrict srv);
318: /*
319: * rpc_register_srvServices() - Register internal service functions
320: *
321: * @srv = RPC server instance
322: * return: -1 error or 0 ok
323: */
324: int rpc_register_srvServices(rpc_srv_t * __restrict srv);
325: /*
326: * rpc_register_blobServices() - Register internal service functions
327: *
328: * @srv = RPC server instance
329: * return: -1 error or 0 ok
330: */
331: int rpc_register_blobServices(rpc_srv_t * __restrict srv);
332:
333:
334: /* RPC Server side functions */
335:
336: /*
337: * rpc_srv_initServer() - Init & create RPC Server
338: *
339: * @InstID = Instance for authentication & recognition
340: * @concurentClients = Concurent clients at same time to this server
341: * @netBuf = Network buffer length (min:512 bytes), if =0 == BUFSIZ (also meaning max RPC packet)
342: * @csHost = Host name or address for bind server, if NULL any address
343: * @Port = Port for bind server, if Port == 0 default port is selected
344: * @proto = Protocol, if == 0 choose SOCK_STREAM
345: * return: NULL == error or !=NULL bind and created RPC server instance
346: */
347: rpc_srv_t *rpc_srv_initServer(unsigned char InstID, int concurentClients, int netBuf,
348: const char *csHost, unsigned short Port, int proto);
349: /*
350: * rpc_srv_endServer() - Destroy RPC server, close all opened sockets and free resources
351: *
352: * @psrv = RPC Server instance
353: * return: none
354: */
355: void rpc_srv_endServer(rpc_srv_t ** __restrict psrv);
356: /*
357: * rpc_srv_loopServer() - Execute Main server loop and wait for clients requests
358: *
359: * @srv = RPC Server instance
360: * return: -1 error or 0 ok, infinite loop ...
361: */
362: int rpc_srv_loopServer(rpc_srv_t * __restrict srv);
363: #define rpc_srv_execServer(_srv, _sync) do { assert((_srv)); \
364: if (!(_srv)->srv_kill) { \
365: pthread_create(&(_srv)->srv_tid, NULL, (void*(*)(void*)) \
366: rpc_srv_loopServer, (_srv)); \
367: if ((_sync)) \
368: pthread_join((_srv)->srv_tid, (void**) (_sync)); \
369: else \
370: pthread_detach((_srv)->srv_tid); \
371: } } while (0)
372: #define rpc_srv_killServer(_srv) (assert((_srv)), (_srv)->srv_blob.kill = 1, (_srv)->srv_kill = 1)
373:
374: /*
375: * rpc_srv_initBLOBServer() - Init & create BLOB Server
376: *
377: * @srv = RPC server instance
378: * @Port = Port for bind server, if Port == 0 default port is selected
379: * @diskDir = Disk place for BLOB file objects
380: * return: -1 == error or 0 bind and created BLOB server instance
381: */
382: int rpc_srv_initBLOBServer(rpc_srv_t * __restrict srv, unsigned short Port, const char *diskDir);
383: /*
384: * rpc_srv_endBLOBServer() - Destroy BLOB server, close all opened sockets and free resources
385: *
386: * @srv = RPC Server instance
387: * return: none
388: */
389: void rpc_srv_endBLOBServer(rpc_srv_t * __restrict srv);
390: /*
391: * rpc_srv_loopBLOB() - Execute Main BLOB server loop and wait for clients requests
392: *
393: * @srv = RPC Server instance
394: * return: -1 error or 0 ok, infinite loop ...
395: */
396: int rpc_srv_loopBLOBServer(rpc_srv_t * __restrict srv);
397: #define rpc_srv_execBLOBServer(_srv) do { assert((_srv)); \
398: if (!(_srv)->srv_kill && !(_srv)->srv_blob.kill) { \
399: pthread_create(&(_srv)->srv_blob.tid, NULL, \
400: (void*(*)(void*)) \
401: rpc_srv_loopBLOBServer, (_srv)); \
402: pthread_detach((_srv)->srv_blob.tid); \
403: } \
404: } while (0)
405:
406: /*
407: * rpc_srv_initServer2() - Init & create layer2 RPC Server
408: *
409: * @InstID = Instance for authentication & recognition
410: * @concurentClients = Concurent clients at same time to this server
411: * @netBuf = Network buffer length (min:512 bytes), if =0 == BUFSIZ (also meaning max RPC packet)
412: * @csIface = Interface name for bind server, if NULL first interface on host
413: * return: NULL == error or !=NULL bind and created RPC server instance
414: */
415: rpc_srv_t *rpc_srv_initServer2(u_char InstID, int concurentClients, int netBuf,
416: const char *csIface);
417: #define rpc_srv_endServer2(x) rpc_srv_endServer((x))
418: /*
419: * rpc_srv_loopServer2() - Execute Main layer2 server loop and wait for clients requests
420: *
421: * @srv = RPC Server instance
422: * return: -1 error or 0 ok, infinite loop ...
423: */
424: int rpc_srv_loopServer2(rpc_srv_t * __restrict srv);
425:
426: /*
427: * rpc_srv_registerCall() - Register call to RPC server
428: *
429: * @srv = RPC Server instance
430: * @tag = Function tag
431: * @funcaddr = Function address
432: * return: -1 error, 0 already registered tag or 1 register ok
433: */
434: int rpc_srv_registerCall(rpc_srv_t * __restrict srv, unsigned short tag, void *funcaddr);
435: /*
436: * rpc_srv_unregisterCall() - Unregister call from RPC server
437: *
438: * @srv = RPC Server instance
439: * @tag = Function tag
440: * return: -1 error, 0 not found call, 1 unregister ok
441: */
442: int rpc_srv_unregisterCall(rpc_srv_t * __restrict srv, unsigned short tag);
443: /*
444: * rpc_srv_getCall() - Get registered call from RPC server
445: *
446: * @srv = RPC Server instance
447: * @tag = tag for function
448: * return: NULL not found call, !=NULL return call
449: */
450: rpc_func_t *rpc_srv_getCall(rpc_srv_t * __restrict srv, uint16_t tag);
451: /*
452: * rpc_srv_execCall() Execute registered call from RPC server
453: *
454: * @cli = RPC client
455: * @rpc = IN RPC call structure
456: * @funcname = Execute RPC function
457: * @args = IN RPC calling arguments from RPC client
458: * return: -1 error, !=-1 ok
459: */
460: int rpc_srv_execCall(rpc_cli_t * __restrict cli, struct tagRPCCall * __restrict rpc,
461: ait_val_t funcname, array_t * __restrict args);
462:
463:
464: /*
465: * rpc_srv_blobCreate() - Create and map blob to memory region and return object
466: *
467: * @srv = RPC Server instance
468: * @len = BLOB length object
469: * @tout = BLOB live timeout in seconds
470: * return: NULL error or !=NULL allocated BLOB object
471: */
472: rpc_blob_t *rpc_srv_blobCreate(rpc_srv_t * __restrict srv, int len, int tout);
473: /*
474: * rpc_srv_blobMap() - Map blob to memory region
475: *
476: * @srv = RPC Server instance
477: * @blob = Map to this BLOB element
478: * return: -1 error or 0 ok
479: */
480: int rpc_srv_blobMap(rpc_srv_t * __restrict srv, rpc_blob_t * __restrict blob);
481: /*
482: * rpc_srv_blobUnmap() - Unmap blob memory region
483: *
484: * @blob = Mapped BLOB element
485: * return: none
486: */
487: void rpc_srv_blobUnmap(rpc_blob_t * __restrict blob);
488: /*
489: * rpc_srv_blobFree() - Free blob from disk & memory
490: *
491: * @srv = RPC Server instance
492: * @blob = Mapped BLOB element
493: * return: -1 error or 0 ok
494: */
495: int rpc_srv_blobFree(rpc_srv_t * __restrict srv, rpc_blob_t * __restrict blob);
496:
497: /*
498: * rpc_srv_registerBLOB() - Register new BLOB to server
499: *
500: * @srv = RPC Server instance
501: * @len = BLOB length
502: * @tout = BLOB live timeout in seconds
503: * return: NULL error or new registered BLOB
504: */
505: rpc_blob_t *rpc_srv_registerBLOB(rpc_srv_t * __restrict srv, size_t len, int tout);
506: /*
507: * rpc_srv_unregisterBLOB() - Unregister BLOB from server
508: *
509: * @srv = RPC Server instance
510: * @var = BLOB Variable for unregister
511: * return: -1 error, 0 not found call, 1 unregister ok
512: */
513: int rpc_srv_unregisterBLOB(rpc_srv_t * __restrict srv, uint32_t var);
514: /*
515: * rpc_srv_getBLOB() - Get registered BLOB
516: *
517: * @srv = RPC Server instance
518: * @var = hash for variable
519: * return: NULL not found, !=NULL return blob var
520: */
521: rpc_blob_t *rpc_srv_getBLOB(rpc_srv_t * __restrict srv, uint32_t var);
522:
523: /*
524: * rpc_srv_sendBLOB() - Send mapped BLOB to client
525: *
526: * @cli = Client instance
527: * @blob = Mapped BLOB element
528: * return: -1 error, 0 ok
529: */
530: int rpc_srv_sendBLOB(rpc_cli_t * __restrict cli, rpc_blob_t * __restrict blob);
531: /*
532: * rpc_srv_recvBLOB() - Receive BLOB from client
533: *
534: * @cli = Client instance
535: * @blob = Mapped BLOB element
536: * return: -1 error, 0 ok, >0 unreceived data from client, may be error?
537: */
538: int rpc_srv_recvBLOB(rpc_cli_t * __restrict cli, rpc_blob_t * __restrict blob);
539:
540: /* CLIENT part of functions */
541:
542: /*
543: * rpc_cli_sendBLOB() - Send BLOB to server
544: *
545: * @cli = Client instance
546: * @var = BLOB variable
547: * @data = BLOB data
548: * @tout = BLOB live on server timeout in seconds, if =0 default timeout
549: * return: -1 error, 0 ok, 1 remote error
550: */
551: int rpc_cli_sendBLOB(rpc_cli_t * __restrict cli, ait_val_t * __restrict var,
552: void * __restrict data, int tout);
553: /*
554: * rpc_cli_recvBLOB() - Receive BLOB from server
555: *
556: * @cli = Client instance
557: * @var = BLOB variable
558: * @data = BLOB data, must be e_free after use!
559: * return: -1 error, 0 ok, 1 remote error
560: */
561: int rpc_cli_recvBLOB(rpc_cli_t * __restrict cli, ait_val_t * __restrict var, void ** __restrict data);
562: /*
563: * rpc_cli_delBLOB() - Delete BLOB from server
564: *
565: * @cli = Client instance
566: * @var = BLOB variable
567: * return: -1 error, 0 ok, 1 remote error
568: */
569: int rpc_cli_delBLOB(rpc_cli_t * __restrict cli, ait_val_t * __restrict var);
570: /*
571: * rpc_cli_getBLOB() - Receive BLOB from server and Delete after that.
572: *
573: * @cli = Client instance
574: * @var = BLOB variable
575: * @data = BLOB data, must be e_free after use!
576: * return: -1 error, 0 ok, >0 remote error
577: */
578: int rpc_cli_getBLOB(rpc_cli_t * __restrict cli, ait_val_t * __restrict var,
579: void ** __restrict data);
580:
581:
582: /* RPC Client side functions */
583:
584: /*
585: * rpc_cli_openClient() - Connect to RPC Server
586: *
587: * @InstID = InstID for RPC session request
588: * @netBuf = Network buffer length (min:512 bytes), if =0 == BUFSIZ (also meaning max RPC packet)
589: * @csHost = Host name or IP address for bind server
590: * @Port = Port for bind server, if Port == 0 default port is selected
591: * @proto = Protocol, if == 0 choose SOCK_STREAM
592: * return: NULL == error or !=NULL connection to RPC server established
593: */
594: rpc_cli_t *rpc_cli_openClient(unsigned char InstID, int netBuf,
595: const char *csHost, unsigned short Port, int proto);
596: /*
597: * rpc_cli_reconnectClient() - Reconnecting client to RPC server
598: *
599: * @cli = RPC Client session
600: * return: -1 error or 0 ok
601: */
602: int rpc_cli_reconnectClient(rpc_cli_t * __restrict cli);
603: /*
604: * rpc_cli_closeClient() - Close connection to RPC server and free resources
605: *
606: * @cli = RPC Client session
607: * return: none
608: */
609: void rpc_cli_closeClient(rpc_cli_t ** __restrict cli);
610: /*
611: * rpc_pkt_Send() - Send RPC packet
612: *
613: * @sock = Socket
614: * @type = Type of socket
615: * @sa = Server address
616: * @pkt = RPC packet
617: * @len = Length of packet
618: * return: -1 error, 0 EOF or >0 sended bytes
619: */
620: int rpc_pkt_Send(int sock, int type, sockaddr_t * __restrict sa,
621: ait_val_t * __restrict pkt, int len);
622: /*
623: * rpc_pkt_Receive() - Receive RPC packet
624: *
625: * @sock = Socket
626: * @type = Type of socket
627: * @sa = Server address
628: * @pkt = RPC packet
629: * return: -1 error, 0 EOF or >0 received bytes
630: */
631: int rpc_pkt_Receive(int sock, int type, sockaddr_t * __restrict sa,
632: ait_val_t * __restrict pkt);
633: /*
634: * rpc_pkt_Request() - Build RPC Request packet
635: *
636: * @pkt = Packet buffer
637: * @sess = RPC session info
638: * @tag = Function tag for execution
639: * @vars = Function argument array of values, may be NULL
640: * @noreply = We not want RPC reply
641: * @nocrc = Without CRC calculation
642: * return: -1 error or != -1 prepared bytes into packet
643: */
644: int rpc_pkt_Request(ait_val_t * __restrict pkt, rpc_sess_t * __restrict sess,
645: unsigned short tag, array_t * __restrict vars, int noreply, int nocrc);
646: /*
647: * rpc_pkt_Replay() - Decode RPC Replay packet
648: *
649: * @pkt = Packet buffer
650: * @sess = RPC session info, if =NULL don't check session
651: * @tag = Function tag
652: * @vars = Function argument array of values, may be NULL
653: * @nocrc = Without CRC calculation
654: * return: -1 error or != -1 return value from function
655: */
656: int rpc_pkt_Replay(ait_val_t * __restrict pkt, rpc_sess_t * __restrict sess,
657: unsigned short tag, array_t ** __restrict vars, int nocrc);
658: /*
659: * rpc_cli_execCall() - Execute RPC call
660: *
661: * @cli = RPC Client session
662: * @noreply = We not want RPC reply
663: * @tag = Function tag for execution
664: * @in_vars = IN function argument array of values, may be NULL
665: * @out_vars = OUT returned array of rpc values, if !=NULL must be free after use with ait_freeVars()
666: * return: -1 error, 0 ok result or 1 closed rpc connection
667: */
668: int rpc_cli_execCall(rpc_cli_t *cli, int noreply, unsigned short tag,
669: array_t * __restrict in_vars, array_t ** __restrict out_vars);
670: /*
671: * rpc_cli_freeCall() - Free resouce allocated by RPC call
672: *
673: * @out_vars = Returned array with variables from RPC call
674: * return: none
675: */
676: void rpc_cli_freeCall(array_t ** __restrict out_vars);
677: /*
678: * rpc_cli_ping() - Ping RPC server
679: *
680: * @cli = connected client
681: * return: -1 error or !=-1 ping seq id
682: */
683: int rpc_cli_ping(rpc_cli_t *cli);
684:
685:
686: /*
687: * rpc_cli_openBLOBClient() - Connect to BLOB Server
688: *
689: * @rpccli = RPC Client session
690: * @Port = Port for bind server, if Port == 0 default port is selected
691: * return: NULL == error or !=NULL connection to BLOB server established
692: */
693: rpc_cli_t *rpc_cli_openBLOBClient(rpc_cli_t * __restrict rpccli, unsigned short Port);
694: /*
695: * rpc_cli_closeBLOBClient() - Close connection to BLOB server and free resources
696: *
697: * @cli = BLOB Client session
698: * return: none
699: */
700: void rpc_cli_closeBLOBClient(rpc_cli_t ** __restrict cli);
701:
702:
703: #endif
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