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 1.8 2012/05/14 08:39:05 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
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 <aitio.h>
61: #include <aitsched.h>
62:
63:
64: #define RPC_VERSION 3
65: #define RPC_DEFPORT 2611
66:
67: /* RPC call request flags */
68:
69: #define RPC_REPLY 0x0
70: #define RPC_NOREPLY 0x1
71:
72: /* RPC builtin registed calls */
73:
74: #define CALL_BLOBSHUTDOWN "rpcBLOBServerShutdown"
75: #define CALL_BLOBCLIENTS "rpcBLOBServerClients"
76: #define CALL_BLOBVARS "rpcBLOBServerVars"
77: #define CALL_BLOBSTATE "rpcBLOBServerState"
78:
79: #define CALL_SRVSHUTDOWN "rpcServerShutdown"
80: #define CALL_SRVCLIENTS "rpcServerClients"
81: #define CALL_SRVCALLS "rpcServerCalls"
82: #define CALL_SRVSESSIONS "rpcServerSessions"
83:
84:
85: /* RPC types */
86:
87: typedef enum {
88: disable, enable, running, kill, /* for blob.state */
89: ok, error, no, /* for blob reply */
90: get, set, unset /* for blob request */
91: } cmd_type_t;
92:
93:
94: #define RPC_CALLBACK_CHECK_INPUT(_f) do { \
95: assert((_f)); \
96: if (!(_f)) { \
97: rpc_SetErr(EINVAL, \
98: "Invalid callback parameters ..."); \
99: return -1; \
100: } \
101: } while (0)
102: #define RPC_CALLBACK_CHK_ARGS(_f, _n) do { \
103: RPC_CALLBACK_CHECK_INPUT((_f)); \
104: if ((_f) && io_arraySize((_f)->func_vars) < _n) { \
105: rpc_SetErr(EINVAL, \
106: "Not enough number of arguments!"); \
107: return -1; \
108: } \
109: } while (0)
110:
111:
112: /* RPC session identification */
113:
114: typedef struct {
115: uint8_t sess_version;
116: uint8_t sess_timeout;
117: uint32_t sess_program;
118: uint32_t sess_process;
119: } __packed rpc_sess_t;
120:
121:
122: /* Server managment RPC functions ... */
123:
124: /* RPC function registration element! */
125: typedef struct tagRPCFunc {
126: uint16_t func_tag;
127: uint32_t func_hash;
128: ait_val_t func_file;
129: ait_val_t func_name;
130:
131: array_t *func_vars;
132:
133: void *func_parent;
134: struct tagRPCFunc *func_next;
135: } rpc_func_t;
136:
137:
138: /* Network RPC packet - Client request */
139:
140: struct tagRPCCall {
141: rpc_sess_t call_session;
142:
143: uint16_t call_len;
144:
145: uint16_t call_tag;
146: uint32_t call_hash;
147: uint16_t call_argc;
148:
149: union {
150: struct {
151: uint64_t flags;
152: } call_req;
153: struct {
154: int32_t ret;
155: int32_t eno;
156: } call_rep;
157: };
158:
159: uint16_t call_crc;
160: } __packed;
161:
162: /* Network BLOB packet - Header */
163:
164: struct tagBLOBHdr {
165: rpc_sess_t hdr_session;
166: uint8_t hdr_cmd;
167: uint32_t hdr_var;
168: uint32_t hdr_len;
169: uint32_t hdr_ret;
170: uint16_t hdr_crc;
171: uint8_t hdr_pad;
172: } __packed;
173:
174: /* Network RPC client & server elements */
175:
176: typedef struct {
177: io_sockaddr_t cli_sa; // host info
178: int cli_sock; // socket fd
179: pthread_t cli_tid; // TID of thread
180:
181: cmd_type_t cli_kill;
182:
183: void *cli_parent; // pointer to parent rpc_srv_t for server or to rpc_sess_t for client
184: int cli_netbuf; // size of network buffer size
185: } rpc_cli_t;
186:
187:
188: /* BLOB registration element! */
189: typedef struct tagBLOB {
190: uint32_t blob_var;
191:
192: size_t blob_len; // size of allocated BLOB data
193: void *blob_data; // BLOB data
194:
195: struct tagBLOB *blob_next;
196: } rpc_blob_t;
197:
198: typedef struct {
199: rpc_sess_t srv_session; // RPC session registration info
200: int srv_numcli; // maximum concurent client connections
201: int srv_netbuf; // size of network buffer size
202:
203: rpc_cli_t srv_server; // RPC server socket
204: rpc_cli_t *srv_clients; // connected rpc client sockets
205:
206: rpc_func_t *srv_funcs; // registered functions list
207:
208: cmd_type_t srv_kill;
209:
210: struct {
211: cmd_type_t state; // BLOB server state: ==0 disable | !=0 enable
212: ait_val_t dir;
213:
214: rpc_cli_t server; // BLOB server socket
215: rpc_cli_t *clients; // connected blob client sockets
216:
217: rpc_blob_t *blobs; // registered blob variables list
218: } srv_blob;
219: } rpc_srv_t;
220:
221:
222: /*
223: * (*rpc_callback_t)() - Callback type definition for RPC call in server process
224: *
225: * @arg1 = current execution RPC call function
226: * @arg2 = number of items in input array from call request
227: * @arg3 = input array with values from RPC call execution request
228: * return: -1 error or >-1 success execution
229: */
230: typedef int (*rpc_callback_t)(rpc_func_t *, int, array_t *);
231:
232:
233: // -----------------------------------------------------------------------
234:
235: /* Error support functions */
236:
237: // rpc_GetErrno() Get error code of last operation
238: inline int rpc_GetErrno();
239: // rpc_GetError() Get error text of last operation
240: inline const char *rpc_GetError();
241:
242:
243: /*
244: * rpc_chkPktSession() - Check session in RPC packet
245: *
246: * @p = packet session
247: * @s = active session
248: * return: -1 error or 0 ok
249: */
250: inline int rpc_chkPktSession(rpc_sess_t *p, rpc_sess_t *s);
251: /*
252: * rpc_addPktSession() - Add session into RPC packet
253: *
254: * @p = packet session
255: * @s = active session
256: * return: -1 error or 0 ok
257: */
258: inline int rpc_addPktSession(rpc_sess_t *p, rpc_sess_t *s);
259:
260:
261: /* RPC Server side functions */
262:
263: /*
264: * rpc_srv_initServer() - Init & create RPC Server
265: *
266: * @regProgID = ProgramID for authentication & recognition
267: * @regProcID = ProcessID for authentication & recognition
268: * @concurentClients = Concurent clients at same time to this server
269: * @netBuf = Network buffer length, if =0 == BUFSIZ (also meaning max RPC packet)
270: * @family = Family type, AF_INET, AF_INET6 or AF_LOCAL
271: * @csHost = Host name or address for bind server, if NULL any address
272: * @Port = Port for bind server, if Port == 0 default port is selected
273: * return: NULL == error or !=NULL bind and created RPC server instance
274: */
275: rpc_srv_t *rpc_srv_initServer(u_int regProgID, u_int regProcID, int concurentClients,
276: int netBuf, u_short family, const char *csHost, u_short Port);
277: /*
278: * rpc_srv_endServer() - Destroy RPC server, close all opened sockets and free resources
279: *
280: * @psrv = RPC Server instance
281: * return: none
282: */
283: void rpc_srv_endServer(rpc_srv_t ** __restrict psrv);
284: /*
285: * rpc_srv_loopServer() - Execute Main server loop and wait for clients requests
286: *
287: * @srv = RPC Server instance
288: * return: -1 error or 0 ok, infinite loop ...
289: */
290: int rpc_srv_loopServer(rpc_srv_t * __restrict srv);
291: #define rpc_srv_execServer(_srv, _sync) do { assert((_srv)); pthread_t __tid; \
292: pthread_create(&__tid, NULL, (void*(*)(void*)) \
293: rpc_srv_loopServer, (_srv)); \
294: if ((_sync)) \
295: pthread_join(__tid, (void**) (_sync)); \
296: else \
297: pthread_detach(__tid); \
298: } while (0)
299:
300: /*
301: * rpc_srv_initBLOBServer() - Init & create BLOB Server
302: *
303: * @srv = RPC server instance
304: * @Port = Port for bind server, if Port == 0 default port is selected
305: * @diskDir = Disk place for BLOB file objects
306: * return: -1 == error or 0 bind and created BLOB server instance
307: */
308: int rpc_srv_initBLOBServer(rpc_srv_t * __restrict srv, u_short Port, const char *diskDir);
309: /*
310: * rpc_srv_endBLOBServer() - Destroy BLOB server, close all opened sockets and free resources
311: *
312: * @srv = RPC Server instance
313: * return: none
314: */
315: void rpc_srv_endBLOBServer(rpc_srv_t * __restrict srv);
316: /*
317: * rpc_srv_loopBLOB() - Execute Main BLOB server loop and wait for clients requests
318: *
319: * @srv = RPC Server instance
320: * return: -1 error or 0 ok, infinite loop ...
321: */
322: int rpc_srv_loopBLOB(rpc_srv_t * __restrict srv);
323: #define rpc_srv_execBLOBServer(_srv) do { assert((_srv)); pthread_t __tid; \
324: if ((_srv)->srv_blob.state == enable) { \
325: pthread_create(&__tid, NULL, (void*(*)(void*)) \
326: rpc_srv_loopBLOB, (_srv)); \
327: pthread_detach(__tid); \
328: (_srv)->srv_blob.state = running; \
329: } \
330: } while (0)
331:
332: /*
333: * rpc_srv_registerCall() - Register call to RPC server
334: *
335: * @srv = RPC Server instance
336: * @csModule = Module name, if NULL self binary
337: * @csFunc = Function name
338: * @args = Number of return function arguments, use for restriction case!
339: * return: -1 error or 0 register ok
340: */
341: int rpc_srv_registerCall(rpc_srv_t * __restrict srv, const char *csModule, const char *csFunc,
342: unsigned short args);
343: /*
344: * rpc_srv_unregisterCall() - Unregister call from RPC server
345: *
346: * @srv = RPC Server instance
347: * @csModule = Module name, if NULL self binary
348: * @csFunc = Function name
349: * return: -1 error, 0 not found call, 1 unregister ok
350: */
351: int rpc_srv_unregisterCall(rpc_srv_t * __restrict srv, const char *csModule, const char *csFunc);
352: /*
353: * rpc_srv_getFunc() - Get registered call from RPC server by Name
354: *
355: * @srv = RPC Server instance
356: * @csModule = Module name, if NULL self binary
357: * @csFunc = Function name
358: * return: NULL not found call, !=NULL return call
359: */
360: rpc_func_t *rpc_srv_getFunc(rpc_srv_t * __restrict srv, const char *csModule, const char *csFunc);
361: /*
362: * rpc_srv_getCall() - Get registered call from RPC server
363: *
364: * @srv = RPC Server instance
365: * @tag = tag for function
366: * @hash = hash for function
367: * return: NULL not found call, !=NULL return call
368: */
369: inline rpc_func_t *rpc_srv_getCall(rpc_srv_t * __restrict srv, uint16_t tag, uint32_t hash);
370: /*
371: * rpc_srv_execCall() - Execute registered call from RPC server
372: *
373: * @call = Register RPC call
374: * @rpc = IN RPC call structure
375: * @args = IN RPC calling arguments from RPC client
376: * return: -1 error, !=-1 ok
377: */
378: int rpc_srv_execCall(rpc_func_t * __restrict call, struct tagRPCCall * __restrict rpc,
379: array_t * __restrict args);
380:
381:
382: /*
383: * rpc_srv_getVars() - Get variables array for RPC call
384: *
385: * @call = RPC function call
386: * @vars = Returned variables array, may be NULL
387: * return: -1 error, !=-1 Number of returned variables
388: */
389: inline int rpc_srv_getVars(rpc_func_t * __restrict call, array_t ** __restrict vars);
390:
391:
392: /*
393: * rpc_srv_blobCreate() - Create map blob to memory region and return object
394: *
395: * @srv = RPC Server instance
396: * @len = BLOB length object
397: * return: NULL error or !=NULL allocated BLOB object
398: */
399: inline rpc_blob_t *rpc_srv_blobCreate(rpc_srv_t * __restrict srv, int len);
400: /*
401: * rpc_srv_blobMap() - Map blob to memory region
402: *
403: * @srv = RPC Server instance
404: * @blob = Map to this BLOB element
405: * return: -1 error or 0 ok
406: */
407: inline int rpc_srv_blobMap(rpc_srv_t * __restrict srv, rpc_blob_t * __restrict blob);
408: /*
409: * rpc_srv_blobUnmap() - Unmap blob memory region
410: *
411: * @blob = Mapped BLOB element
412: * return: none
413: */
414: inline void rpc_srv_blobUnmap(rpc_blob_t * __restrict blob);
415: /*
416: * rpc_srv_blobFree() - Free blob from disk & memory
417: *
418: * @srv = RPC Server instance
419: * @blob = Mapped BLOB element
420: * return: -1 error or 0 ok
421: */
422: inline int rpc_srv_blobFree(rpc_srv_t * __restrict srv, rpc_blob_t * __restrict blob);
423:
424: /*
425: * rpc_srv_registerBLOB() - Register new BLOB to server
426: *
427: * @srv = RPC Server instance
428: * @len = BLOB length
429: * return: NULL error or new registered BLOB
430: */
431: rpc_blob_t *rpc_srv_registerBLOB(rpc_srv_t * __restrict srv, size_t len);
432: /*
433: * rpc_srv_unregisterBLOB() - Unregister BLOB from server
434: *
435: * @srv = RPC Server instance
436: * @var = BLOB Variable for unregister
437: * return: -1 error, 0 not found call, 1 unregister ok
438: */
439: int rpc_srv_unregisterBLOB(rpc_srv_t * __restrict srv, uint32_t var);
440: /*
441: * rpc_srv_getBLOB() - Get registered BLOB
442: *
443: * @srv = RPC Server instance
444: * @var = hash for variable
445: * return: NULL not found, !=NULL return blob var
446: */
447: inline rpc_blob_t *rpc_srv_getBLOB(rpc_srv_t * __restrict srv, uint32_t var);
448:
449: /*
450: * rpc_srv_sendBLOB() - Send mapped BLOB to client
451: *
452: * @cli = Client instance
453: * @blob = Mapped BLOB element
454: * return: -1 error, 0 ok
455: */
456: int rpc_srv_sendBLOB(rpc_cli_t * __restrict cli, rpc_blob_t * __restrict blob);
457: /*
458: * rpc_srv_recvBLOB() - Receive BLOB from client
459: *
460: * @cli = Client instance
461: * @blob = Mapped BLOB element
462: * return: -1 error, 0 ok, >0 unreceived data from client, may be error?
463: */
464: int rpc_srv_recvBLOB(rpc_cli_t * __restrict cli, rpc_blob_t * __restrict blob);
465:
466: /* CLIENT part of functions */
467:
468: /*
469: * rpc_cli_sendBLOB() - Send BLOB to server
470: *
471: * @cli = Client instance
472: * @var = BLOB variable
473: * @data = BLOB data
474: * return: -1 error, 0 ok, 1 remote error
475: */
476: int rpc_cli_sendBLOB(rpc_cli_t * __restrict cli, ait_val_t * __restrict var, void * __restrict data);
477: /*
478: * rpc_cli_recvBLOB() - Receive BLOB from server
479: *
480: * @cli = Client instance
481: * @var = BLOB variable
482: * @data = BLOB data, must be free after use!
483: * return: -1 error, 0 ok, 1 remote error
484: */
485: int rpc_cli_recvBLOB(rpc_cli_t * __restrict cli, ait_val_t * __restrict var, void ** __restrict data);
486: /*
487: * rpc_cli_delBLOB() - Delete BLOB from server
488: *
489: * @cli = Client instance
490: * @var = BLOB variable
491: * return: -1 error, 0 ok, 1 remote error
492: */
493: int rpc_cli_delBLOB(rpc_cli_t * __restrict cli, ait_val_t * __restrict var);
494: /*
495: * rpc_cli_getBLOB() - Receive BLOB from server and Delete after that.
496: *
497: * @cli = Client instance
498: * @var = BLOB variable
499: * @data = BLOB data, must be free after use!
500: * return: -1 error, 0 ok, >0 remote error
501: */
502: inline int rpc_cli_getBLOB(rpc_cli_t * __restrict cli, ait_val_t * __restrict var,
503: void ** __restrict data);
504:
505:
506: /*
507: * rpc_calcHashes() - Calculate hashes for RPC call
508: *
509: * @func = function
510: * @csModule = Module name, if NULL self binary
511: * @csFunc = Function name
512: * return: -1 error or 0 ok
513: */
514: int rpc_calcHashes(rpc_func_t * __restrict func, const char *csModule, const char *csFunc);
515:
516:
517: /* RPC Client side functions */
518:
519: /*
520: * rpc_cli_openClient() - Connect to RPC Server
521: *
522: * @ProgID = ProgramID for RPC session request
523: * @ProcID = ProcessID for RPC session request
524: * @netBuf = Network buffer length, if =0 == BUFSIZ (also meaning max RPC packet)
525: * @Timeout = RPC timeout in seconds, if =0 set default RPC timeout
526: * @family = Family socket type, AF_INET or AF_INET6
527: * @csHost = Host name or IP address for bind server
528: * @Port = Port for bind server, if Port == 0 default port is selected
529: * return: NULL == error or !=NULL connection to RPC server established
530: */
531: rpc_cli_t *rpc_cli_openClient(unsigned int ProgID, unsigned int ProcID, int netBuf,
532: unsigned char Timeout, unsigned short family,
533: const char *csHost, unsigned short Port);
534: /*
535: * rpc_cli_closeClient() - Close connection to RPC server and free resources
536: *
537: * @cli = RPC Client session
538: * return: none
539: */
540: void rpc_cli_closeClient(rpc_cli_t * __restrict cli);
541: /*
542: * rpc_cli_execCall() - Execute RPC call
543: *
544: * @cli = RPC Client session
545: * @noreply = We not want RPC reply
546: * @csModule = Module name, if NULL self binary
547: * @csFunc = Function name for execute
548: * @in_vars = IN RPC call array of rpc values
549: * @out_vars = OUT returned array of rpc values, must be free after use with rpc_cli_freeVals()
550: * return: -1 error or != -1 ok result
551: */
552: int rpc_cli_execCall(rpc_cli_t *cli, int noreply, const char *csModule, const char *csFunc,
553: array_t * __restrict in_vars, array_t ** __restrict out_vars);
554:
555:
556: /*
557: * rpc_cli_openBLOBClient() - Connect to BLOB Server
558: *
559: * @rpccli = RPC Client session
560: * @Port = Port for bind server, if Port == 0 default port is selected
561: * return: NULL == error or !=NULL connection to BLOB server established
562: */
563: rpc_cli_t *rpc_cli_openBLOBClient(rpc_cli_t * __restrict rpccli, u_short Port);
564: /*
565: * rpc_cli_closeBLOBClient() - Close connection to BLOB server and free resources
566: *
567: * @cli = BLOB Client session
568: * return: none
569: */
570: void rpc_cli_closeBLOBClient(rpc_cli_t * __restrict cli);
571:
572:
573: #endif
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