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 1.3.2.1 2011/08/29 23:26:56 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) && (_f)->func_args != _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: int8_t func_args;
123: ait_val_t *func_vars;
124:
125: void *func_parent;
126: struct tagRPCFunc *func_next;
127: } rpc_func_t;
128:
129:
130: /* Network RPC packet - Client request */
131:
132: struct tagRPCCall {
133: rpc_sess_t call_session;
134: uint16_t call_tag;
135: uint32_t call_hash;
136: uint8_t call_argc;
137: } __packed;
138:
139: /* Network RPC packet - Server response */
140:
141: struct tagRPCRet {
142: rpc_sess_t ret_session;
143: uint16_t ret_tag;
144: uint32_t ret_hash;
145: int32_t ret_retcode;
146: int32_t ret_errno;
147: uint8_t ret_argc;
148: } __packed;
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: } __packed;
159:
160: /* Network RPC client & server elements */
161:
162: typedef struct {
163: struct sockaddr cli_sa; // host info
164: int cli_sock; // socket fd
165: pthread_t cli_tid; // TID of thread
166:
167: void *cli_parent; // pointer to parent rpc_srv_t for server or to rpc_sess_t for client
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:
185: rpc_cli_t srv_server; // RPC server socket
186: rpc_cli_t *srv_clients; // connected rpc client sockets
187:
188: rpc_func_t *srv_funcs; // registered functions list
189:
190: pthread_mutex_t srv_mtx;
191: cmd_type_t srv_kill;
192:
193: struct {
194: cmd_type_t state; // BLOB server state: ==0 disable | !=0 enable
195: char dir[UCHAR_MAX + 1];
196:
197: rpc_cli_t server; // BLOB server socket
198: rpc_cli_t *clients; // connected blob client sockets
199:
200: rpc_blob_t *blobs; // registered blob variables list
201:
202: pthread_mutex_t mtx;
203: } srv_blob;
204: } rpc_srv_t;
205:
206:
207: /*
208: * (*rpc_callback_t)() Callback type definition for RPC call in server process
209: * @arg1 = current execution RPC call function
210: * @arg2 = number of items in input array from call request
211: * @arg3 = input array with values from RPC call execution request
212: * return: -1 error or >-1 success execution
213: */
214: typedef int (*rpc_callback_t)(rpc_func_t *, int, ait_val_t *);
215:
216:
217: // -----------------------------------------------------------------------
218:
219: /* Error support functions */
220:
221: // rpc_GetErrno() Get error code of last operation
222: inline int rpc_GetErrno();
223: // rpc_GetError() Get error text of last operation
224: inline const char *rpc_GetError();
225:
226:
227: /* RPC Server side functions */
228:
229: /*
230: * rpc_srv_initServer() Init & create RPC Server
231: * @regProgID = ProgramID for authentication & recognition
232: * @regProcID = ProcessID for authentication & recognition
233: * @concurentClients = Concurent clients at same time to this server
234: * @family = Family type, AF_INET, AF_INET6 or AF_LOCAL
235: * @csHost = Host name or address for bind server, if NULL any address
236: * @Port = Port for bind server, if Port == 0 default port is selected
237: * return: NULL == error or !=NULL bind and created RPC server instance
238: */
239: rpc_srv_t *rpc_srv_initServer(u_int regProgID, u_int regProcID, int concurentClients,
240: u_short family, const char *csHost, u_short Port);
241: /*
242: * rpc_srv_endServer() Destroy RPC server, close all opened sockets and free resources
243: * @srv = RPC Server instance
244: * return: none
245: */
246: void rpc_srv_endServer(rpc_srv_t * __restrict srv);
247: /*
248: * rpc_srv_execServer() Execute Main server loop and wait for clients requests
249: * @srv = RPC Server instance
250: * return: -1 error or 0 ok, infinite loop ...
251: */
252: int rpc_srv_execServer(rpc_srv_t * __restrict srv);
253:
254: /*
255: * rpc_srv_initBLOBServer() Init & create BLOB Server
256: * @srv = RPC server instance
257: * @Port = Port for bind server, if Port == 0 default port is selected
258: * @diskDir = Disk place for BLOB file objects
259: * return: -1 == error or 0 bind and created BLOB server instance
260: */
261: int rpc_srv_initBLOBServer(rpc_srv_t * __restrict srv, u_short Port, const char *diskDir);
262: /*
263: * rpc_srv_endBLOBServer() Destroy BLOB server, close all opened sockets and free resources
264: * @srv = RPC Server instance
265: * return: none
266: */
267: void rpc_srv_endBLOBServer(rpc_srv_t * __restrict srv);
268: /*
269: * rpc_srv_execBLOBServer() Execute Main BLOB server loop and wait for clients requests
270: * @srv = RPC Server instance
271: * return: -1 error or 0 ok, infinite loop ...
272: */
273: int rpc_srv_execBLOBServer(rpc_srv_t * __restrict srv);
274:
275: /*
276: * rpc_srv_registerCall() Register call to RPC server
277: * @srv = RPC Server instance
278: * @csModule = Module name, if NULL self binary
279: * @csFunc = Function name
280: * @args = Number of return function arguments, use for restriction case!
281: * return: -1 error or 0 register ok
282: */
283: int rpc_srv_registerCall(rpc_srv_t * __restrict srv, const char *csModule, const char *csFunc,
284: unsigned char args);
285: /*
286: * rpc_srv_unregisterCall() Unregister call from RPC server
287: * @srv = RPC Server instance
288: * @csModule = Module name, if NULL self binary
289: * @csFunc = Function name
290: * return: -1 error, 0 not found call, 1 unregister ok
291: */
292: int rpc_srv_unregisterCall(rpc_srv_t * __restrict srv, const char *csModule, const char *csFunc);
293: /*
294: * rpc_srv_getFunc() Get registered call from RPC server by Name
295: * @srv = RPC Server instance
296: * @csModule = Module name, if NULL self binary
297: * @csFunc = Function name
298: * return: NULL not found call, !=NULL return call
299: */
300: rpc_func_t *rpc_srv_getFunc(rpc_srv_t * __restrict srv, const char *csModule, const char *csFunc);
301: /*
302: * rpc_srv_getCall() Get registered call from RPC server
303: * @srv = RPC Server instance
304: * @tag = tag for function
305: * @hash = hash for function
306: * return: NULL not found call, !=NULL return call
307: */
308: inline rpc_func_t *rpc_srv_getCall(rpc_srv_t * __restrict srv, uint16_t tag, uint32_t hash);
309: /*
310: * rpc_srv_execCall() Execute registered call from RPC server
311: * @call = Register RPC call
312: * @rpc = IN RPC call structure
313: * @args = IN RPC call array of rpc values
314: * return: -1 error, !=-1 ok
315: */
316: int rpc_srv_execCall(rpc_func_t * __restrict call, struct tagRPCCall * __restrict rpc,
317: ait_val_t * __restrict args);
318:
319:
320: /*
321: * rpc_srv_returnVars() Init return variables for RPC call and zeroed values
322: (for safe handling return values, use this!)
323: * @call = RPC function call
324: * @varnum = Number of return variables
325: * return: NULL error, !=NULL array with return values for RPC call with varnum items
326: */
327: inline ait_val_t *rpc_srv_returnVars(rpc_func_t * __restrict call, int varnum);
328: /*
329: * rpc_srv_allocVars() Allocate array for call variables,
330: if already allocated memory for RPC call reallocate used space
331: * @call = RPC function call
332: * @varnum = Number of variables, if ==0 free previous allocated variables
333: * return: -1 error, !=-1 return varnum value
334: */
335: inline int rpc_srv_allocVars(rpc_func_t * __restrict call, int varnum);
336: #define rpc_srv_freeVars(_call) (assert((_call)), rpc_srv_allocVars((_call), 0))
337: /*
338: * rpc_srv_zeroVars() Clean values from variables of RPC call
339: * @call = RPC function call
340: * return: -1 error, !=-1 Returned number of cleaned RPC variables
341: */
342: inline int rpc_srv_zeroVars(rpc_func_t * __restrict call);
343: /*
344: * rpc_srv_copyVars() Copy variables for RPC call to new variable array
345: * @call = RPC function call
346: * @newvars = New allocated variables array, must be free after use
347: * return: -1 error, !=-1 Returned number of copied RPC variables
348: */
349: inline int rpc_srv_copyVars(rpc_func_t * __restrict call, ait_val_t ** __restrict newvars);
350: /*
351: * rpc_srv_getVars() Get variables array for RPC call
352: * @call = RPC function call
353: * @vars = Returned variables array, may be NULL
354: * return: -1 error, !=-1 Number of returned variables
355: */
356: inline int rpc_srv_getVars(rpc_func_t * __restrict call, ait_val_t ** __restrict vars);
357:
358:
359: /*
360: * rpc_srv_blobCreate() Create map blob to memory region and return object
361: * @srv = RPC Server instance
362: * @len = BLOB length object
363: * return: NULL error or !=NULL allocated BLOB object
364: */
365: inline rpc_blob_t *rpc_srv_blobCreate(rpc_srv_t * __restrict srv, int len);
366: /*
367: * rpc_srv_blobMap() Map blob to memory region
368: * @srv = RPC Server instance
369: * @blob = Map to this BLOB element
370: * return: -1 error or 0 ok
371: */
372: inline int rpc_srv_blobMap(rpc_srv_t * __restrict srv, rpc_blob_t * __restrict blob);
373: /*
374: * rpc_srv_blobUnmap() Unmap blob memory region
375: * @blob = Mapped BLOB element
376: * return: none
377: */
378: inline void rpc_srv_blobUnmap(rpc_blob_t * __restrict blob);
379: /*
380: * rpc_srv_blobFree() Free blob from disk & memory
381: * @srv = RPC Server instance
382: * @blob = Mapped BLOB element
383: * return: -1 error or 0 ok
384: */
385: inline int rpc_srv_blobFree(rpc_srv_t * __restrict srv, rpc_blob_t * __restrict blob);
386:
387: /*
388: * rpc_srv_registerBLOB() Register new BLOB to server
389: * @srv = RPC Server instance
390: * @len = BLOB length
391: * return: NULL error or new registered BLOB
392: */
393: rpc_blob_t *rpc_srv_registerBLOB(rpc_srv_t * __restrict srv, size_t len);
394: /*
395: * rpc_srv_unregisterBLOB() Unregister BLOB from server
396: * @srv = RPC Server instance
397: * @var = BLOB Variable for unregister
398: * return: -1 error, 0 not found call, 1 unregister ok
399: */
400: int rpc_srv_unregisterBLOB(rpc_srv_t * __restrict srv, uint32_t var);
401: /*
402: * rpc_srv_getBLOB() Get registered BLOB
403: * @srv = RPC Server instance
404: * @var = hash for variable
405: * return: NULL not found, !=NULL return blob var
406: */
407: inline rpc_blob_t *rpc_srv_getBLOB(rpc_srv_t * __restrict srv, uint32_t var);
408:
409: /*
410: * rpc_srv_sendBLOB() Send mapped BLOB to client
411: * @cli = Client instance
412: * @blob = Mapped BLOB element
413: * return: -1 error, 0 ok
414: */
415: int rpc_srv_sendBLOB(rpc_cli_t * __restrict cli, rpc_blob_t * __restrict blob);
416: /*
417: * rpc_srv_recvBLOB() Receive BLOB from client
418: * @cli = Client instance
419: * @blob = Mapped BLOB element
420: * return: -1 error, 0 ok, >0 unreceived data from client, may be error?
421: */
422: int rpc_srv_recvBLOB(rpc_cli_t * __restrict cli, rpc_blob_t * __restrict blob);
423:
424: /*
425: * rpc_cli_sendBLOB() Send BLOB to server
426: * @cli = Client instance
427: * @var = BLOB variable
428: * @data = BLOB data
429: * return: -1 error, 0 ok, 1 remote error
430: */
431: int rpc_cli_sendBLOB(rpc_cli_t * __restrict cli, ait_val_t * __restrict var, void * __restrict data);
432: /*
433: * rpc_cli_recvBLOB() Receive BLOB from server
434: * @cli = Client instance
435: * @var = BLOB variable
436: * @data = BLOB data, must be free after use!
437: * return: -1 error, 0 ok, 1 remote error
438: */
439: int rpc_cli_recvBLOB(rpc_cli_t * __restrict cli, ait_val_t * __restrict var, void ** data);
440: /*
441: * rpc_cli_delBLOB() Delete BLOB from server
442: * @cli = Client instance
443: * @var = BLOB variable
444: * return: -1 error, 0 ok, 1 remote error
445: */
446: int rpc_cli_delBLOB(rpc_cli_t * __restrict cli, ait_val_t * __restrict var);
447: /*
448: * rpc_cli_getBLOB() Receive BLOB from server and Delete after that.
449: * @cli = Client instance
450: * @var = BLOB variable
451: * @data = BLOB data, must be free after use!
452: * return: -1 error, 0 ok, >0 remote error
453: */
454: inline int rpc_cli_getBLOB(rpc_cli_t * __restrict cli, ait_val_t * __restrict var, void ** data);
455:
456:
457:
458: /* RPC Client side functions */
459:
460: /*
461: * rpc_cli_openClient() Connect to RPC Server
462: * @ProgID = ProgramID for RPC session request
463: * @ProcID = ProcessID for RPC session request
464: * @family = Family socket type, AF_INET or AF_INET6
465: * @csHost = Host name or IP address for bind server
466: * @Port = Port for bind server, if Port == 0 default port is selected
467: * return: NULL == error or !=NULL connection to RPC server established
468: */
469: rpc_cli_t *rpc_cli_openClient(u_int ProgID, u_int ProcID,
470: u_short family, const char *csHost, u_short Port);
471: /*
472: * rpc_cli_closeClient() Close connection to RPC server and free resources
473: * @cli = RPC Client session
474: * return: none
475: */
476: void rpc_cli_closeClient(rpc_cli_t * __restrict cli);
477: /*
478: * rpc_cli_execCall() Execute RPC call
479: * @cli = RPC Client session
480: * @csModule = Module name, if NULL self binary
481: * @csFunc = Function name for execute
482: * @in_argc = IN count of arguments
483: * @in_vars = IN RPC call array of rpc values
484: * @out_argc = OUT returned count of arguments
485: * @out_vars = OUT returned array of rpc values, must be free after use (see 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, int in_argc,
489: ait_val_t * __restrict in_vars, int *out_argc, ait_val_t ** __restrict out_vars);
490: /*
491: * rpc_cli_freeVals() Free ait_val_t array returned from RPC call
492: * @args = Number of arguments in array
493: * @vars = Value elements
494: * return: none
495: */
496: inline void rpc_cli_freeVals(int args, ait_val_t * __restrict vars);
497:
498:
499: /*
500: * rpc_cli_openBLOBClient() Connect to BLOB Server
501: * @rpccli = RPC Client session
502: * @Port = Port for bind server, if Port == 0 default port is selected
503: * return: NULL == error or !=NULL connection to BLOB server established
504: */
505: rpc_cli_t *rpc_cli_openBLOBClient(rpc_cli_t * __restrict rpccli, u_short Port);
506: /*
507: * rpc_cli_closeBLOBClient() Close connection to BLOB server and free resources
508: * @cli = BLOB Client session
509: * return: none
510: */
511: void rpc_cli_closeBLOBClient(rpc_cli_t * __restrict cli);
512:
513:
514: #endif
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