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 1.3.2.5 2011/09/01 11:39:26 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, 2005, 2006, 2007, 2008, 2009, 2010, 2011
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 <sys/types.h>
54: #include <sys/param.h>
55: #if !defined(__NetBSD__)
56: #include <sys/limits.h>
57: #endif
58: #include <sys/socket.h>
59: #include <aitio.h>
60:
61:
62: #define RPC_VERSION 1
63: #define RPC_DEFPORT 2611
64:
65:
66: /* RPC builtin registed calls */
67:
68: #define CALL_BLOBSHUTDOWN "rpcBLOBServerShutdown"
69: #define CALL_BLOBCLIENTS "rpcBLOBServerClients"
70: #define CALL_BLOBVARS "rpcBLOBServerVars"
71: #define CALL_BLOBSTATE "rpcBLOBServerState"
72:
73: #define CALL_SRVSHUTDOWN "rpcServerShutdown"
74: #define CALL_SRVCLIENTS "rpcServerClients"
75: #define CALL_SRVCALLS "rpcServerCalls"
76: #define CALL_SRVSESSIONS "rpcServerSessions"
77:
78:
79: /* RPC types */
80:
81: typedef enum {
82: disable, enable, kill, /* for blob.state */
83: ok, error, /* for blob reply */
84: get, set, unset /* for blob request */
85: } cmd_type_t;
86:
87:
88: #define RPC_CALLBACK_CHECK_INPUT(_f) do { \
89: assert((_f)); \
90: if (!(_f)) { \
91: rpc_SetErr(22, "Error:: invalid callback parameters ...\n"); \
92: return -1; \
93: } \
94: } while (0)
95: #define RPC_CALLBACK_CHK_ARGS(_f, _n) do { \
96: RPC_CALLBACK_CHECK_INPUT((_f)); \
97: if ((_f) && io_arraySize((_f)->func_vars) != _n) { \
98: rpc_SetErr(22, "Error:: different number of arguments!\n"); \
99: return -1; \
100: } \
101: } while (0)
102:
103:
104: /* RPC session identification */
105:
106: typedef struct {
107: uint8_t sess_version;
108: uint32_t sess_program;
109: uint32_t sess_process;
110: } __packed rpc_sess_t;
111:
112:
113: /* Server managment RPC functions ... */
114:
115: // RPC function registration element!
116: typedef struct tagRPCFunc {
117: uint16_t func_tag;
118: uint32_t func_hash;
119: int8_t func_file[MAXPATHLEN];
120: int8_t func_name[UCHAR_MAX + 1];
121:
122: array_t *func_vars;
123:
124: void *func_parent;
125: struct tagRPCFunc *func_next;
126: } rpc_func_t;
127:
128:
129: /* Network RPC packet - Client request */
130:
131: struct tagRPCCall {
132: rpc_sess_t call_session;
133: uint16_t call_tag;
134: uint32_t call_hash;
135: uint16_t call_argc;
136: } __packed;
137:
138: /* Network RPC packet - Server response */
139:
140: struct tagRPCRet {
141: rpc_sess_t ret_session;
142: uint16_t ret_tag;
143: uint32_t ret_hash;
144: int32_t ret_retcode;
145: int32_t ret_errno;
146: uint16_t ret_argc;
147: } __packed;
148:
149: /* Network BLOB packet - Header */
150:
151: struct tagBLOBHdr {
152: rpc_sess_t hdr_session;
153: uint8_t hdr_cmd;
154: uint32_t hdr_var;
155: uint32_t hdr_len;
156: uint32_t hdr_ret;
157: } __packed;
158:
159: /* Network RPC client & server elements */
160:
161: typedef struct {
162: struct sockaddr cli_sa; // host info
163: int cli_sock; // socket fd
164: pthread_t cli_tid; // TID of thread
165:
166: void *cli_parent; // pointer to parent rpc_srv_t for server or to rpc_sess_t for client
167: int cli_netbuf; // size of network buffer size
168: } rpc_cli_t;
169:
170:
171: // BLOB registration element!
172: typedef struct tagBLOB {
173: uint32_t blob_var;
174:
175: size_t blob_len; // size of allocated BLOB data
176: void *blob_data; // BLOB data
177:
178: struct tagBLOB *blob_next;
179: } rpc_blob_t;
180:
181: typedef struct {
182: rpc_sess_t srv_session; // RPC session registration info
183: int srv_numcli; // maximum concurent client connections
184: int srv_netbuf; // size of network buffer size
185:
186: rpc_cli_t srv_server; // RPC server socket
187: rpc_cli_t *srv_clients; // connected rpc client sockets
188:
189: rpc_func_t *srv_funcs; // registered functions list
190:
191: pthread_mutex_t srv_mtx;
192: cmd_type_t srv_kill;
193:
194: struct {
195: cmd_type_t state; // BLOB server state: ==0 disable | !=0 enable
196: char dir[UCHAR_MAX + 1];
197:
198: rpc_cli_t server; // BLOB server socket
199: rpc_cli_t *clients; // connected blob client sockets
200:
201: rpc_blob_t *blobs; // registered blob variables list
202:
203: pthread_mutex_t mtx;
204: } srv_blob;
205: } rpc_srv_t;
206:
207:
208: /*
209: * (*rpc_callback_t)() Callback type definition for RPC call in server process
210: * @arg1 = current execution RPC call function
211: * @arg2 = number of items in input array from call request
212: * @arg3 = input array with values from RPC call execution request
213: * return: -1 error or >-1 success execution
214: */
215: typedef int (*rpc_callback_t)(rpc_func_t *, int, array_t *);
216:
217:
218: // -----------------------------------------------------------------------
219:
220: /* Error support functions */
221:
222: // rpc_GetErrno() Get error code of last operation
223: inline int rpc_GetErrno();
224: // rpc_GetError() Get error text of last operation
225: inline const char *rpc_GetError();
226:
227:
228: /* RPC Server side functions */
229:
230: /*
231: * rpc_srv_initServer() Init & create RPC Server
232: * @regProgID = ProgramID for authentication & recognition
233: * @regProcID = ProcessID for authentication & recognition
234: * @concurentClients = Concurent clients at same time to this server
235: * @netBuf = Network buffer length, if =0 == BUFSIZ (also meaning max RPC packet)
236: * @family = Family type, AF_INET, AF_INET6 or AF_LOCAL
237: * @csHost = Host name or address for bind server, if NULL any address
238: * @Port = Port for bind server, if Port == 0 default port is selected
239: * return: NULL == error or !=NULL bind and created RPC server instance
240: */
241: rpc_srv_t *rpc_srv_initServer(u_int regProgID, u_int regProcID, int concurentClients,
242: int netBuf, u_short family, const char *csHost, u_short Port);
243: /*
244: * rpc_srv_endServer() Destroy RPC server, close all opened sockets and free resources
245: * @srv = RPC Server instance
246: * return: none
247: */
248: void rpc_srv_endServer(rpc_srv_t * __restrict srv);
249: /*
250: * rpc_srv_execServer() Execute Main server loop and wait for clients requests
251: * @srv = RPC Server instance
252: * return: -1 error or 0 ok, infinite loop ...
253: */
254: int rpc_srv_execServer(rpc_srv_t * __restrict srv);
255:
256: /*
257: * rpc_srv_initBLOBServer() Init & create BLOB Server
258: * @srv = RPC server instance
259: * @Port = Port for bind server, if Port == 0 default port is selected
260: * @diskDir = Disk place for BLOB file objects
261: * return: -1 == error or 0 bind and created BLOB server instance
262: */
263: int rpc_srv_initBLOBServer(rpc_srv_t * __restrict srv, u_short Port, const char *diskDir);
264: /*
265: * rpc_srv_endBLOBServer() Destroy BLOB server, close all opened sockets and free resources
266: * @srv = RPC Server instance
267: * return: none
268: */
269: void rpc_srv_endBLOBServer(rpc_srv_t * __restrict srv);
270: /*
271: * rpc_srv_execBLOBServer() Execute Main BLOB server loop and wait for clients requests
272: * @srv = RPC Server instance
273: * return: -1 error or 0 ok, infinite loop ...
274: */
275: int rpc_srv_execBLOBServer(rpc_srv_t * __restrict srv);
276:
277: /*
278: * rpc_srv_registerCall() Register call to RPC server
279: * @srv = RPC Server instance
280: * @csModule = Module name, if NULL self binary
281: * @csFunc = Function name
282: * @args = Number of return function arguments, use for restriction case!
283: * return: -1 error or 0 register ok
284: */
285: int rpc_srv_registerCall(rpc_srv_t * __restrict srv, const char *csModule, const char *csFunc,
286: unsigned short args);
287: /*
288: * rpc_srv_unregisterCall() Unregister call from RPC server
289: * @srv = RPC Server instance
290: * @csModule = Module name, if NULL self binary
291: * @csFunc = Function name
292: * return: -1 error, 0 not found call, 1 unregister ok
293: */
294: int rpc_srv_unregisterCall(rpc_srv_t * __restrict srv, const char *csModule, const char *csFunc);
295: /*
296: * rpc_srv_getFunc() Get registered call from RPC server by Name
297: * @srv = RPC Server instance
298: * @csModule = Module name, if NULL self binary
299: * @csFunc = Function name
300: * return: NULL not found call, !=NULL return call
301: */
302: rpc_func_t *rpc_srv_getFunc(rpc_srv_t * __restrict srv, const char *csModule, const char *csFunc);
303: /*
304: * rpc_srv_getCall() Get registered call from RPC server
305: * @srv = RPC Server instance
306: * @tag = tag for function
307: * @hash = hash for function
308: * return: NULL not found call, !=NULL return call
309: */
310: inline rpc_func_t *rpc_srv_getCall(rpc_srv_t * __restrict srv, uint16_t tag, uint32_t hash);
311: /*
312: * rpc_srv_execCall() Execute registered call from RPC server
313: * @call = Register RPC call
314: * @rpc = IN RPC call structure
315: * @args = IN RPC calling arguments from RPC client
316: * return: -1 error, !=-1 ok
317: */
318: int rpc_srv_execCall(rpc_func_t * __restrict call, struct tagRPCCall * __restrict rpc,
319: array_t * __restrict args);
320:
321:
322: /*
323: * rpc_srv_allocVars() Allocate array for call variables,
324: if already allocated memory for RPC call reallocate used space
325: * @call = RPC function call
326: * @varnum = Number of variables, if ==0 free previous allocated variables
327: * return: -1 error, !=-1 return varnum value
328: */
329: inline int rpc_srv_allocVars(rpc_func_t * __restrict call, int varnum);
330: /*
331: * rpc_srv_destroyVars() Destroy variables of array & array
332: * @call = RPC function call
333: * return: -1 error, !=-1 Returne remained variables
334: */
335: inline int rpc_srv_destroyVars(rpc_func_t * __restrict call);
336: /*
337: * rpc_srv_freeVals() Clean values from variables of array
338: * @call = RPC function call
339: * return: -1 error, !=-1 Returned number of cleaned variables
340: */
341: inline int rpc_srv_freeVals(rpc_func_t * __restrict call);
342: /*
343: * rpc_srv_copyVars() Copy variables for RPC call to new variable array
344: * @call = RPC function call
345: * @newvars = New allocated variables array, must be free after use
346: * return: -1 error, !=-1 Returned number of copied RPC variables
347: */
348: inline int rpc_srv_copyVars(rpc_func_t * __restrict call, array_t ** __restrict newvars);
349: /*
350: * rpc_srv_getVars() Get variables array for RPC call
351: * @call = RPC function call
352: * @vars = Returned variables array, may be NULL
353: * return: -1 error, !=-1 Number of returned variables
354: */
355: inline int rpc_srv_getVars(rpc_func_t * __restrict call, array_t ** __restrict vars);
356:
357:
358: /*
359: * rpc_srv_blobCreate() Create map blob to memory region and return object
360: * @srv = RPC Server instance
361: * @len = BLOB length object
362: * return: NULL error or !=NULL allocated BLOB object
363: */
364: inline rpc_blob_t *rpc_srv_blobCreate(rpc_srv_t * __restrict srv, int len);
365: /*
366: * rpc_srv_blobMap() Map blob to memory region
367: * @srv = RPC Server instance
368: * @blob = Map to this BLOB element
369: * return: -1 error or 0 ok
370: */
371: inline int rpc_srv_blobMap(rpc_srv_t * __restrict srv, rpc_blob_t * __restrict blob);
372: /*
373: * rpc_srv_blobUnmap() Unmap blob memory region
374: * @blob = Mapped BLOB element
375: * return: none
376: */
377: inline void rpc_srv_blobUnmap(rpc_blob_t * __restrict blob);
378: /*
379: * rpc_srv_blobFree() Free blob from disk & memory
380: * @srv = RPC Server instance
381: * @blob = Mapped BLOB element
382: * return: -1 error or 0 ok
383: */
384: inline int rpc_srv_blobFree(rpc_srv_t * __restrict srv, rpc_blob_t * __restrict blob);
385:
386: /*
387: * rpc_srv_registerBLOB() Register new BLOB to server
388: * @srv = RPC Server instance
389: * @len = BLOB length
390: * return: NULL error or new registered BLOB
391: */
392: rpc_blob_t *rpc_srv_registerBLOB(rpc_srv_t * __restrict srv, size_t len);
393: /*
394: * rpc_srv_unregisterBLOB() Unregister BLOB from server
395: * @srv = RPC Server instance
396: * @var = BLOB Variable for unregister
397: * return: -1 error, 0 not found call, 1 unregister ok
398: */
399: int rpc_srv_unregisterBLOB(rpc_srv_t * __restrict srv, uint32_t var);
400: /*
401: * rpc_srv_getBLOB() Get registered BLOB
402: * @srv = RPC Server instance
403: * @var = hash for variable
404: * return: NULL not found, !=NULL return blob var
405: */
406: inline rpc_blob_t *rpc_srv_getBLOB(rpc_srv_t * __restrict srv, uint32_t var);
407:
408: /*
409: * rpc_srv_sendBLOB() Send mapped BLOB to client
410: * @cli = Client instance
411: * @blob = Mapped BLOB element
412: * return: -1 error, 0 ok
413: */
414: int rpc_srv_sendBLOB(rpc_cli_t * __restrict cli, rpc_blob_t * __restrict blob);
415: /*
416: * rpc_srv_recvBLOB() Receive BLOB from client
417: * @cli = Client instance
418: * @blob = Mapped BLOB element
419: * return: -1 error, 0 ok, >0 unreceived data from client, may be error?
420: */
421: int rpc_srv_recvBLOB(rpc_cli_t * __restrict cli, rpc_blob_t * __restrict blob);
422:
423: /* CLIENT part of functions */
424:
425: /*
426: * rpc_cli_sendBLOB() Send BLOB to server
427: * @cli = Client instance
428: * @var = BLOB variable
429: * @data = BLOB data
430: * return: -1 error, 0 ok, 1 remote error
431: */
432: int rpc_cli_sendBLOB(rpc_cli_t * __restrict cli, ait_val_t * __restrict var, void * __restrict data);
433: /*
434: * rpc_cli_recvBLOB() Receive BLOB from server
435: * @cli = Client instance
436: * @var = BLOB variable
437: * @data = BLOB data, must be free after use!
438: * return: -1 error, 0 ok, 1 remote error
439: */
440: int rpc_cli_recvBLOB(rpc_cli_t * __restrict cli, ait_val_t * __restrict var, void ** data);
441: /*
442: * rpc_cli_delBLOB() Delete BLOB from server
443: * @cli = Client instance
444: * @var = BLOB variable
445: * return: -1 error, 0 ok, 1 remote error
446: */
447: int rpc_cli_delBLOB(rpc_cli_t * __restrict cli, ait_val_t * __restrict var);
448: /*
449: * rpc_cli_getBLOB() Receive BLOB from server and Delete after that.
450: * @cli = Client instance
451: * @var = BLOB variable
452: * @data = BLOB data, must be free after use!
453: * return: -1 error, 0 ok, >0 remote error
454: */
455: inline int rpc_cli_getBLOB(rpc_cli_t * __restrict cli, ait_val_t * __restrict var, void ** data);
456:
457:
458:
459: /* RPC Client side functions */
460:
461: /*
462: * rpc_cli_openClient() Connect to RPC Server
463: * @ProgID = ProgramID for RPC session request
464: * @ProcID = ProcessID for RPC session request
465: * @netBuf = Network buffer length, if =0 == BUFSIZ (also meaning max RPC packet)
466: * @family = Family socket type, AF_INET or AF_INET6
467: * @csHost = Host name or IP address for bind server
468: * @Port = Port for bind server, if Port == 0 default port is selected
469: * return: NULL == error or !=NULL connection to RPC server established
470: */
471: rpc_cli_t *rpc_cli_openClient(u_int ProgID, u_int ProcID, int netBuf,
472: u_short family, const char *csHost, u_short Port);
473: /*
474: * rpc_cli_closeClient() Close connection to RPC server and free resources
475: * @cli = RPC Client session
476: * return: none
477: */
478: void rpc_cli_closeClient(rpc_cli_t * __restrict cli);
479: /*
480: * rpc_cli_execCall() Execute RPC call
481: * @cli = RPC Client session
482: * @csModule = Module name, if NULL self binary
483: * @csFunc = Function name for execute
484: * @in_vars = IN RPC call array of rpc values
485: * @out_vars = OUT returned array of rpc values, must be free after use with rpc_cli_freeVals()
486: * return: -1 error or != -1 ok result
487: */
488: int rpc_cli_execCall(rpc_cli_t *cli, const char *csModule, const char *csFunc,
489: array_t * __restrict in_vars, array_t ** __restrict out_vars);
490: /*
491: * rpc_cli_freeVals() Free ait_val_t array returned from RPC call
492: * @vars = Variable array
493: * return: none
494: */
495: inline void rpc_cli_freeVals(array_t ** __restrict vars);
496: /*
497: * rpc_cli_allocVals() Allocate ait_val_t array for RPC call
498: * @args = Number of arguments
499: * return: =NULL error or !=NULL allocated array
500: */
501: inline array_t *rpc_cli_allocVals(unsigned short args);
502:
503:
504: /*
505: * rpc_cli_openBLOBClient() Connect to BLOB Server
506: * @rpccli = RPC Client session
507: * @Port = Port for bind server, if Port == 0 default port is selected
508: * return: NULL == error or !=NULL connection to BLOB server established
509: */
510: rpc_cli_t *rpc_cli_openBLOBClient(rpc_cli_t * __restrict rpccli, u_short Port);
511: /*
512: * rpc_cli_closeBLOBClient() Close connection to BLOB server and free resources
513: * @cli = BLOB Client session
514: * return: none
515: */
516: void rpc_cli_closeBLOBClient(rpc_cli_t * __restrict cli);
517:
518:
519: #endif
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