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 1.25.2.4 2015/01/18 01:03:49 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 - 2015
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: /* Additional ELWIX RPC supporting protocols */
69: #ifndef SOCK_STREAM
70: #define SOCK_STREAM 1 /* stream socket */
71: #endif
72: #ifndef SOCK_DGRAM
73: #define SOCK_DGRAM 2 /* datagram socket */
74: #endif
75: #ifndef SOCK_RAW
76: #define SOCK_RAW 3 /* raw-protocol interface */
77: #endif
78: #define SOCK_BPF 4 /* ethernet interface */
79: #define SOCK_EXT 5 /* bi-directional pipe interface */
80:
81: /* RPC call request flags */
82:
83: #define RPC_REPLY 0x0
84: #define RPC_NOREPLY 0x1
85:
86: /* RPC builtin registed calls */
87:
88: #define CALL_TAG_MAX 65535
89:
90: #define CALL_SRVPING 65534
91:
92: #define CALL_SRVSHUTDOWN 65533
93: #define CALL_SRVCLIENTS 65532
94: #define CALL_SRVCALLS 65531
95: #define CALL_SRVSESSIONS 65530
96:
97: #define CALL_BLOBSHUTDOWN 65529
98: #define CALL_BLOBCLIENTS 65528
99: #define CALL_BLOBVARS 65527
100:
101: /* RPC signals */
102: #define SIGFBLOB 54
103:
104: /* RPC types */
105:
106: typedef enum {
107: ok, error, no, /* for blob reply */
108: get, set, unset /* for blob request */
109: } blob_cmd_type_t;
110:
111:
112: #define RPC_CALLBACK_CHECK_INPUT(x) do { \
113: assert((x)); \
114: if (!(x)) { \
115: rpc_SetErr(EINVAL, \
116: "Invalid callback parameters ..."); \
117: return -1; \
118: } \
119: } while (0)
120:
121:
122: /* RPC session identification */
123:
124: typedef struct {
125: #if BYTE_ORDER == LITTLE_ENDIAN
126: uint16_t sess_instance:8;
127: uint16_t sess_version:8;
128: #endif
129: #if BYTE_ORDER == BIG_ENDIAN
130: uint16_t sess_version:8;
131: uint16_t sess_instance:8;
132: #endif
133: } __packed rpc_sess_t; /* size == 2 bytes */
134:
135:
136: /* Server managment RPC functions ... */
137:
138: /* Network RPC packet - Client request */
139:
140: struct tagRPCCall {
141: rpc_sess_t call_session;
142:
143: uint32_t call_len;
144: uint16_t call_crc;
145:
146: union {
147: struct {
148: uint64_t flags;
149: } call_req;
150: struct {
151: int32_t ret;
152: int32_t eno;
153: } call_rep;
154: };
155:
156: uint16_t call_tag;
157: uint16_t call_argc;
158: ait_val_t call_argv[0];
159: } __packed; /* size == 20 bytes */
160: #define RPC_CHK_NOREPLY(x) (ntohl((u_long) (x)->call_req.flags) & RPC_NOREPLY)
161: #define RPC_SET_ERRNO(x, _v) ((x)->call_rep.eno = htonl((_v)))
162:
163: /* Network BLOB packet - Header */
164:
165: struct tagBLOBHdr {
166: rpc_sess_t hdr_session;
167: uint8_t hdr_cmd;
168: uint32_t hdr_var;
169: uint32_t hdr_len;
170: uint32_t hdr_ret;
171: uint8_t hdr_pad;
172: } __packed; /* size == 16 bytes */
173:
174: /* Network RPC client & server elements */
175:
176: /* RPC function registration element! */
177: typedef struct tagRPCFunc {
178: ait_val_t func_name;
179:
180: void *func_parent;
181:
182: SLIST_ENTRY(tagRPCFunc) func_next;
183: AVL_ENTRY(tagRPCFunc) func_node;
184: } rpc_func_t;
185: #define RPC_FUNC_SERVER(x) ((rpc_srv_t*) (x)->func_parent)
186:
187: /* Tree root node */
188: typedef struct tagRPCFuncs {
189: pthread_mutex_t mtx;
190:
191: struct tagRPCFunc *slh_first;
192: struct tagRPCFunc *avlh_root;
193: } rpc_funcs_t;
194: #define RPC_FUNCS_LOCK(x) pthread_mutex_lock(&(x)->mtx)
195: #define RPC_FUNCS_UNLOCK(x) pthread_mutex_unlock(&(x)->mtx)
196: #define RPC_FUNCS_ISEMPTY(x) AVL_EMPTY((x))
197:
198:
199: /* BLOB register element */
200: typedef struct tagBLOB {
201: uint32_t blob_var; /* BLOB id */
202:
203: size_t blob_len; /* size of allocated BLOB data */
204: void *blob_data; /* mapped BLOB data */
205:
206: TAILQ_ENTRY(tagBLOB) blob_node;
207: } rpc_blob_t;
208:
209:
210: typedef struct {
211: int cli_id; /* slot id */
212: int cli_sock; /* socket fd */
213: sockaddr_t cli_sa; /* host address */
214: ait_val_t cli_buf; /* network buffer */
215:
216: array_t *cli_vars; /* function return variables */
217:
218: void *cli_parent; /* pointer to parent rpc_srv_t for server or to rpc_sess_t for client */
219: } rpc_cli_t;
220: #define RPC_RETVARS(x) ((x)->cli_vars)
221: #define RPC_SRV_SERVER(x) ((rpc_srv_t*) (x)->cli_parent)
222: #define RPC_CLI_SESSION(x) ((rpc_sess_t*) (x)->cli_parent)
223:
224: typedef struct {
225: rpc_sess_t srv_session; /* RPC session registration info */
226: int srv_netbuf; /* size of network buffer */
227: int srv_proto; /* Server protocol */
228:
229: pthread_t srv_tid; /* RPC exec pthread */
230: sched_root_task_t *srv_root; /* RPC server scheduler */
231: intptr_t srv_kill; /* Scheduler condition variable */
232:
233: rpc_cli_t srv_server; /* RPC server socket */
234: array_t *srv_clients; /* connected rpc client sockets */
235:
236: rpc_funcs_t srv_funcs; /* RPC functions */
237:
238: struct {
239: pthread_t tid; /* BLOB exec pthread */
240: sched_root_task_t *root; /* BLOB server scheduler */
241: intptr_t kill; /* BLOB server state: ==0 disable | !=0 enable */
242:
243: ait_val_t dir; /* BLOB states directory */
244:
245: rpc_cli_t server; /* BLOB server socket */
246: array_t *clients; /* connected blob client sockets */
247:
248: TAILQ_HEAD(, tagBLOB) blobs; /* registered blob variables list */
249: } srv_blob;
250: } rpc_srv_t;
251:
252:
253: /*
254: * (*rpc_callback_t)() - Callback type definition for RPC call in server process
255: *
256: * @arg1 = RPC client
257: * @arg2 = RPC packet header
258: * @arg3 = input array with values from RPC call execution request
259: * return: -1 error or >-1 success execution
260: */
261: typedef int (*rpc_callback_t)(rpc_cli_t *, struct tagRPCCall *, array_t *);
262:
263: #define RPC_CALL_DEFINE(x) int (x)(rpc_cli_t*, struct tagRPCCall*, array_t*)
264: #define RPC_CALL_ARGS(arg1, arg2, arg3) rpc_cli_t* arg1, struct tagRPCCall* arg2, array_t* arg3
265: #define RPC_CALL_STDARGS RPC_CALL_ARGS(cli, rpc, iv)
266:
267:
268: /* ----------------------------------------------------------------------- */
269:
270: /* Error support functions */
271:
272: // rpc_GetErrno() Get error code of last operation
273: int rpc_GetErrno();
274: // rpc_GetError() Get error text of last operation
275: const char *rpc_GetError();
276: // rpc_SetErr() Set error to variables for internal use!!!
277: void rpc_SetErr(int eno, char *estr, ...);
278:
279:
280:
281: /*
282: * rpc_Read() - RPC read operation
283: *
284: * @sock = socket
285: * @type = type of socket
286: * @flags = receive flags
287: * @sa = check client address, if you use udp protocol
288: * @buf = buffer
289: * @blen = buffer length
290: * return: -1 error, 0 EOF or or >0 readed bytes into buffer
291: */
292: ssize_t rpc_Read(int sock, int type, int flags, sockaddr_t * __restrict sa,
293: unsigned char * __restrict buf, size_t blen);
294: /*
295: * rpc_Write() - RPC write operation
296: *
297: * @sock = socket
298: * @type = type of socket
299: * @flags = send flags
300: * @sa = send to client address, if you use udp protocol
301: * @buf = buffer
302: * @blen = buffer length
303: * return: -1 error, 0 EOF or >0 written bytes into buffer
304: */
305: ssize_t rpc_Write(int sock, int type, int flags, sockaddr_t * __restrict sa,
306: unsigned char * __restrict buf, size_t blen);
307:
308: /*
309: * rpc_chkPktSession() - Check RPC session
310: *
311: * @p = packet session
312: * @s = active session
313: * return: -1, 1, 2, 3 are errors or 0 ok
314: */
315: int rpc_chkPktSession(rpc_sess_t *p, rpc_sess_t *s);
316: /*
317: * rpc_addPktSession() - Prepare session into network format
318: *
319: * @p = packet session
320: * @s = host session
321: * return: -1 error or 0 ok
322: */
323: int rpc_addPktSession(rpc_sess_t *p, rpc_sess_t *s);
324: /*
325: * rpc_register_srvPing() - Register ping service function
326: *
327: * @srv = RPC server instance
328: * return: -1 error or 0 ok
329: */
330: int rpc_register_srvPing(rpc_srv_t * __restrict srv);
331: /*
332: * rpc_register_srvServices() - Register internal service functions
333: *
334: * @srv = RPC server instance
335: * return: -1 error or 0 ok
336: */
337: int rpc_register_srvServices(rpc_srv_t * __restrict srv);
338: /*
339: * rpc_register_blobServices() - Register internal service functions
340: *
341: * @srv = RPC server instance
342: * return: -1 error or 0 ok
343: */
344: int rpc_register_blobServices(rpc_srv_t * __restrict srv);
345:
346:
347: /* RPC Server side functions */
348:
349: /*
350: * rpc_srv_initServer() - Init & create RPC Server
351: *
352: * @InstID = Instance for authentication & recognition
353: * @concurentClients = Concurent clients at same time to this server
354: * @netBuf = Network buffer length (min:512 bytes), if =0 == BUFSIZ (also meaning max RPC packet)
355: * @csHost = Host name or address for bind server, if NULL any address
356: * @Port = Port for bind server, if Port == 0 default port is selected
357: * @proto = Protocol, if == 0 choose SOCK_STREAM
358: * return: NULL == error or !=NULL bind and created RPC server instance
359: */
360: rpc_srv_t *rpc_srv_initServer(unsigned char InstID, int concurentClients, int netBuf,
361: const char *csHost, unsigned short Port, int proto);
362: /*
363: * rpc_srv_endServer() - Destroy RPC server, close all opened sockets and free resources
364: *
365: * @psrv = RPC Server instance
366: * return: none
367: */
368: void rpc_srv_endServer(rpc_srv_t ** __restrict psrv);
369: /*
370: * rpc_srv_loopServer() - Execute Main server loop and wait for clients requests
371: *
372: * @srv = RPC Server instance
373: * return: -1 error or 0 ok, infinite loop ...
374: */
375: int rpc_srv_loopServer(rpc_srv_t * __restrict srv);
376: #define rpc_srv_execServer(_srv, _sync) \
377: do { assert((_srv)); \
378: if (!(_srv)->srv_kill) { \
379: pthread_create(&(_srv)->srv_tid, NULL, (void*(*)(void*)) \
380: rpc_srv_loopServer, (_srv)); \
381: if ((_sync)) \
382: pthread_join((_srv)->srv_tid, (void**) (_sync)); \
383: else \
384: pthread_detach((_srv)->srv_tid); \
385: } } while (0)
386: #define rpc_srv_killServer(_srv) \
387: (assert((_srv)), (_srv)->srv_blob.kill = 1, (_srv)->srv_kill = 1)
388:
389: /*
390: * rpc_srv_initBLOBServer() - Init & create BLOB Server
391: *
392: * @srv = RPC server instance
393: * @Port = Port for bind server, if Port == 0 default port is selected
394: * @diskDir = Disk place for BLOB file objects
395: * return: -1 == error or 0 bind and created BLOB server instance
396: */
397: int rpc_srv_initBLOBServer(rpc_srv_t * __restrict srv, unsigned short Port, const char *diskDir);
398: /*
399: * rpc_srv_endBLOBServer() - Destroy BLOB server, close all opened sockets and free resources
400: *
401: * @srv = RPC Server instance
402: * return: none
403: */
404: void rpc_srv_endBLOBServer(rpc_srv_t * __restrict srv);
405: /*
406: * rpc_srv_loopBLOB() - Execute Main BLOB server loop and wait for clients requests
407: *
408: * @srv = RPC Server instance
409: * return: -1 error or 0 ok, infinite loop ...
410: */
411: int rpc_srv_loopBLOBServer(rpc_srv_t * __restrict srv);
412: #define rpc_srv_execBLOBServer(_srv) \
413: do { assert((_srv)); \
414: if (!(_srv)->srv_kill && !(_srv)->srv_blob.kill) { \
415: pthread_create(&(_srv)->srv_blob.tid, NULL, \
416: (void*(*)(void*)) rpc_srv_loopBLOBServer, (_srv)); \
417: pthread_detach((_srv)->srv_blob.tid); \
418: } \
419: } while (0)
420:
421: /*
422: * rpc_srv_initServer2() - Init & create layer2 RPC Server
423: *
424: * @InstID = Instance for authentication & recognition
425: * @concurentClients = Concurent clients at same time to this server
426: * @netBuf = Network buffer length (min:512 bytes), if =0 == BUFSIZ (also meaning max RPC packet)
427: * @csIface = Interface name for bind server, if NULL first interface on host
428: * return: NULL == error or !=NULL bind and created RPC server instance
429: */
430: rpc_srv_t *rpc_srv_initServer2(u_char InstID, int concurentClients, int netBuf,
431: const char *csIface);
432:
433: /*
434: * rpc_srv_initServerExt() - Init & create pipe RPC Server
435: *
436: * @InstID = Instance for authentication & recognition
437: * @netBuf = Network buffer length (min:512 bytes), if =0 == BUFSIZ (also meaning max RPC packet)
438: * @fd = File descriptor
439: * return: NULL == error or !=NULL bind and created RPC server instance
440: */
441: rpc_srv_t *rpc_srv_initServerExt(u_char InstID, int netBuf, int fd);
442:
443: /*
444: * rpc_srv_registerCall() - Register call to RPC server
445: *
446: * @srv = RPC Server instance
447: * @tag = Function tag
448: * @funcaddr = Function address
449: * return: -1 error, 0 already registered tag or 1 register ok
450: */
451: int rpc_srv_registerCall(rpc_srv_t * __restrict srv, unsigned short tag, void *funcaddr);
452: /*
453: * rpc_srv_unregisterCall() - Unregister call from RPC server
454: *
455: * @srv = RPC Server instance
456: * @tag = Function tag
457: * return: -1 error, 0 not found call, 1 unregister ok
458: */
459: int rpc_srv_unregisterCall(rpc_srv_t * __restrict srv, unsigned short tag);
460: /*
461: * rpc_srv_getCall() - Get registered call from RPC server
462: *
463: * @srv = RPC Server instance
464: * @tag = tag for function
465: * return: NULL not found call, !=NULL return call
466: */
467: rpc_func_t *rpc_srv_getCall(rpc_srv_t * __restrict srv, uint16_t tag);
468: /*
469: * rpc_srv_execCall() Execute registered call from RPC server
470: *
471: * @cli = RPC client
472: * @rpc = IN RPC call structure
473: * @funcname = Execute RPC function
474: * @args = IN RPC calling arguments from RPC client
475: * return: -1 error, !=-1 ok
476: */
477: int rpc_srv_execCall(rpc_cli_t * __restrict cli, struct tagRPCCall * __restrict rpc,
478: ait_val_t funcname, array_t * __restrict args);
479:
480:
481: /*
482: * rpc_srv_blobCreate() - Create and map blob to memory region and return object
483: *
484: * @srv = RPC Server instance
485: * @len = BLOB length object
486: * @tout = BLOB live timeout in seconds
487: * return: NULL error or !=NULL allocated BLOB object
488: */
489: rpc_blob_t *rpc_srv_blobCreate(rpc_srv_t * __restrict srv, int len, int tout);
490: /*
491: * rpc_srv_blobMap() - Map blob to memory region
492: *
493: * @srv = RPC Server instance
494: * @blob = Map to this BLOB element
495: * return: -1 error or 0 ok
496: */
497: int rpc_srv_blobMap(rpc_srv_t * __restrict srv, rpc_blob_t * __restrict blob);
498: /*
499: * rpc_srv_blobUnmap() - Unmap blob memory region
500: *
501: * @blob = Mapped BLOB element
502: * return: none
503: */
504: void rpc_srv_blobUnmap(rpc_blob_t * __restrict blob);
505: /*
506: * rpc_srv_blobFree() - Free blob from disk & memory
507: *
508: * @srv = RPC Server instance
509: * @blob = Mapped BLOB element
510: * return: -1 error or 0 ok
511: */
512: int rpc_srv_blobFree(rpc_srv_t * __restrict srv, rpc_blob_t * __restrict blob);
513:
514: /*
515: * rpc_srv_registerBLOB() - Register new BLOB to server
516: *
517: * @srv = RPC Server instance
518: * @len = BLOB length
519: * @tout = BLOB live timeout in seconds
520: * return: NULL error or new registered BLOB
521: */
522: rpc_blob_t *rpc_srv_registerBLOB(rpc_srv_t * __restrict srv, size_t len, int tout);
523: /*
524: * rpc_srv_unregisterBLOB() - Unregister BLOB from server
525: *
526: * @srv = RPC Server instance
527: * @var = BLOB Variable for unregister
528: * return: -1 error, 0 not found call, 1 unregister ok
529: */
530: int rpc_srv_unregisterBLOB(rpc_srv_t * __restrict srv, uint32_t var);
531: /*
532: * rpc_srv_getBLOB() - Get registered BLOB
533: *
534: * @srv = RPC Server instance
535: * @var = hash for variable
536: * return: NULL not found, !=NULL return blob var
537: */
538: rpc_blob_t *rpc_srv_getBLOB(rpc_srv_t * __restrict srv, uint32_t var);
539:
540: /*
541: * rpc_srv_sendBLOB() - Send mapped BLOB to client
542: *
543: * @cli = Client instance
544: * @blob = Mapped BLOB element
545: * return: -1 error, 0 ok
546: */
547: int rpc_srv_sendBLOB(rpc_cli_t * __restrict cli, rpc_blob_t * __restrict blob);
548: /*
549: * rpc_srv_recvBLOB() - Receive BLOB from client
550: *
551: * @cli = Client instance
552: * @blob = Mapped BLOB element
553: * return: -1 error, 0 ok, >0 unreceived data from client, may be error?
554: */
555: int rpc_srv_recvBLOB(rpc_cli_t * __restrict cli, rpc_blob_t * __restrict blob);
556:
557: /* CLIENT part of functions */
558:
559: /*
560: * rpc_cli_sendBLOB() - Send BLOB to server
561: *
562: * @cli = Client instance
563: * @var = BLOB variable
564: * @data = BLOB data
565: * @tout = BLOB live on server timeout in seconds, if =0 default timeout
566: * return: -1 error, 0 ok, 1 remote error
567: */
568: int rpc_cli_sendBLOB(rpc_cli_t * __restrict cli, ait_val_t * __restrict var,
569: void * __restrict data, int tout);
570: /*
571: * rpc_cli_recvBLOB() - Receive BLOB from server
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, 1 remote error
577: */
578: int rpc_cli_recvBLOB(rpc_cli_t * __restrict cli, ait_val_t * __restrict var, void ** __restrict data);
579: /*
580: * rpc_cli_delBLOB() - Delete BLOB from server
581: *
582: * @cli = Client instance
583: * @var = BLOB variable
584: * return: -1 error, 0 ok, 1 remote error
585: */
586: int rpc_cli_delBLOB(rpc_cli_t * __restrict cli, ait_val_t * __restrict var);
587: /*
588: * rpc_cli_getBLOB() - Receive BLOB from server and Delete after that.
589: *
590: * @cli = Client instance
591: * @var = BLOB variable
592: * @data = BLOB data, must be e_free after use!
593: * return: -1 error, 0 ok, >0 remote error
594: */
595: int rpc_cli_getBLOB(rpc_cli_t * __restrict cli, ait_val_t * __restrict var,
596: void ** __restrict data);
597:
598:
599: /* RPC Client side functions */
600:
601: /*
602: * rpc_cli_openClient() - Connect to RPC Server
603: *
604: * @InstID = InstID for RPC session request
605: * @netBuf = Network buffer length (min:512 bytes), if =0 == BUFSIZ (also meaning max RPC packet)
606: * @csHost = Host name or IP address for bind server
607: * @Port = Port for bind server, if Port == 0 default port is selected
608: * @proto = Protocol, if == 0 choose SOCK_STREAM
609: * return: NULL == error or !=NULL connection to RPC server established
610: */
611: rpc_cli_t *rpc_cli_openClient(unsigned char InstID, int netBuf,
612: const char *csHost, unsigned short Port, int proto);
613: /*
614: * rpc_cli_reconnectClient() - Reconnecting client to RPC server
615: *
616: * @cli = RPC Client session
617: * return: -1 error or 0 ok
618: */
619: int rpc_cli_reconnectClient(rpc_cli_t * __restrict cli);
620: /*
621: * rpc_cli_closeClient() - Close connection to RPC server and free resources
622: *
623: * @cli = RPC Client session
624: * return: none
625: */
626: void rpc_cli_closeClient(rpc_cli_t ** __restrict cli);
627: /*
628: * rpc_pkt_Send() - Send RPC packet
629: *
630: * @sock = Socket
631: * @type = Type of socket
632: * @sa = Server address
633: * @pkt = RPC packet
634: * @len = Length of packet
635: * return: -1 error, 0 EOF or >0 sended bytes
636: */
637: int rpc_pkt_Send(int sock, int type, sockaddr_t * __restrict sa,
638: ait_val_t * __restrict pkt, int len);
639: /*
640: * rpc_pkt_Receive() - Receive RPC packet
641: *
642: * @sock = Socket
643: * @type = Type of socket
644: * @sa = Server address
645: * @pkt = RPC packet
646: * return: -1 error, 0 EOF or >0 received bytes
647: */
648: int rpc_pkt_Receive(int sock, int type, sockaddr_t * __restrict sa,
649: ait_val_t * __restrict pkt);
650: /*
651: * rpc_pkt_Request() - Build RPC Request packet
652: *
653: * @pkt = Packet buffer
654: * @sess = RPC session info
655: * @tag = Function tag for execution
656: * @vars = Function argument array of values, may be NULL
657: * @noreply = We not want RPC reply
658: * @nocrc = Without CRC calculation
659: * return: -1 error or != -1 prepared bytes into packet
660: */
661: int rpc_pkt_Request(ait_val_t * __restrict pkt, rpc_sess_t * __restrict sess,
662: unsigned short tag, array_t * __restrict vars, int noreply, int nocrc);
663: /*
664: * rpc_pkt_Replay() - Decode RPC Replay packet
665: *
666: * @pkt = Packet buffer
667: * @sess = RPC session info, if =NULL don't check session
668: * @tag = Function tag
669: * @vars = Function argument array of values, may be NULL
670: * @nocrc = Without CRC calculation
671: * return: -1 error or != -1 return value from function
672: */
673: int rpc_pkt_Replay(ait_val_t * __restrict pkt, rpc_sess_t * __restrict sess,
674: unsigned short tag, array_t ** __restrict vars, int nocrc);
675: /*
676: * rpc_cli_execCall() - Execute RPC call
677: *
678: * @cli = RPC Client session
679: * @noreply = We not want RPC reply
680: * @tag = Function tag for execution
681: * @in_vars = IN function argument array of values, may be NULL
682: * @out_vars = OUT returned array of rpc values, if !=NULL must be free after use with ait_freeVars()
683: * return: -1 error, 0 ok result or 1 closed rpc connection
684: */
685: int rpc_cli_execCall(rpc_cli_t *cli, int noreply, unsigned short tag,
686: array_t * __restrict in_vars, array_t ** __restrict out_vars);
687: /*
688: * rpc_cli_freeCall() - Free resouce allocated by RPC call
689: *
690: * @out_vars = Returned array with variables from RPC call
691: * return: none
692: */
693: void rpc_cli_freeCall(array_t ** __restrict out_vars);
694: /*
695: * rpc_cli_ping() - Ping RPC server
696: *
697: * @cli = connected client
698: * return: -1 error or !=-1 ping seq id
699: */
700: int rpc_cli_ping(rpc_cli_t *cli);
701:
702:
703: /*
704: * rpc_cli_openBLOBClient() - Connect to BLOB Server
705: *
706: * @rpccli = RPC Client session
707: * @Port = Port for bind server, if Port == 0 default port is selected
708: * return: NULL == error or !=NULL connection to BLOB server established
709: */
710: rpc_cli_t *rpc_cli_openBLOBClient(rpc_cli_t * __restrict rpccli, unsigned short Port);
711: /*
712: * rpc_cli_closeBLOBClient() - Close connection to BLOB server and free resources
713: *
714: * @cli = BLOB Client session
715: * return: none
716: */
717: void rpc_cli_closeBLOBClient(rpc_cli_t ** __restrict cli);
718:
719:
720: /*
721: * rpc_cli_openClient2() - Connect to layer2 RPC Server
722: *
723: * @InstID = InstID for RPC session request
724: * @netBuf = Network buffer length (min:512 bytes), if =0 == BUFSIZ (also meaning max RPC packet)
725: * @csIface = Interface name for bind client, if NULL first interface on host
726: * @csHost = Host ethernet address
727: * return: NULL == error or !=NULL connection to RPC server established
728: */
729: rpc_cli_t *rpc_cli_openClient2(u_char InstID, int netBuf,
730: const char *csIface, const char *csHost);
731: /*
732: * rpc_cli_closeClient2() - Close layer2 connection to RPC server and free resources
733: *
734: * @cli = RPC Client session
735: * return: none
736: */
737: void rpc_cli_closeClient2(rpc_cli_t ** __restrict cli);
738:
739:
740: /*
741: * rpc_cli_openClientExt() - Connect to pipe RPC Server
742: *
743: * @InstID = InstID for RPC session request
744: * @netBuf = Network buffer length (min:512 bytes), if =0 == BUFSIZ (also meaning max RPC packet)
745: * @fd = File descriptor
746: * return: NULL == error or !=NULL connection to RPC server established
747: */
748: rpc_cli_t *rpc_cli_openClientExt(u_char InstID, int netBuf, int fd);
749: /*
750: * rpc_cli_closeClientExt() - Close pipe connection to RPC server and free resources
751: *
752: * @cli = RPC Client session
753: * return: none
754: */
755: void rpc_cli_closeClientExt(rpc_cli_t ** __restrict cli);
756:
757:
758: #endif
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