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: lists.c,v 1.4.2.2 2011/08/31 17:11:58 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: #include "global.h"
47:
48:
49: /*
50: * rpc_srv_returnVars() Init return variables for RPC call and zeroed values
51: (for safe handling return values, use this!)
52: * @call = RPC function call
53: * @varnum = Number of return variables
54: * return: NULL error, !=NULL array with return values for RPC call with varnum items
55: */
56: inline array_t *
57: rpc_srv_returnVars(rpc_func_t * __restrict call, int varnum)
58: {
59: array_t *v = NULL;
60:
61: if (rpc_srv_allocVars(call, varnum) == -1)
62: return NULL;
63: if (rpc_srv_getVars(call, &v) == -1)
64: return NULL;
65:
66: return v;
67: }
68:
69: /*
70: * rpc_srv_allocVars() Allocate array for call variables,
71: if already allocated memory for RPC call reallocate used space
72: * @call = RPC function call
73: * @varnum = Number of variables, if ==0 free previous allocated variables
74: * return: -1 error, !=-1 return varnum value
75: */
76: inline int
77: rpc_srv_allocVars(rpc_func_t * __restrict call, int varnum)
78: {
79: register int i;
80: ait_val_t *v;
81:
82: if (!call || varnum < 0) {
83: rpc_SetErr(EINVAL, "Error:: Invalid parameter can`t allocate variables for RPC call...\n");
84: return -1;
85: }
86:
87: if (call->func_vars)
88: for (i = 0; i < io_arraySize(call->func_vars); i++)
89: if (io_arrayGet(call->func_vars, i))
90: AIT_FREE_VAL(io_array(call->func_vars, i, ait_val_t*));
91: io_arrayFree(call->func_vars);
92: io_arrayDestroy(&call->func_vars);
93:
94: if (varnum) {
95: if (!(call->func_vars = io_arrayInit(varnum)))
96: return -1;
97:
98: for (i = 0; i < io_arraySize(call->func_vars); i++) {
99: v = malloc(sizeof(ait_val_t));
100: if (!v) {
101: LOGERR;
102: rpc_srv_freeVars(call);
103: return -1;
104: } else {
105: memset(v, 0, sizeof(ait_val_t));
106: io_arraySet(call->func_vars, i, v);
107: }
108: }
109:
110: varnum = io_arraySize(call->func_vars);
111: }
112:
113: return varnum;
114: }
115:
116: /*
117: * rpc_srv_zeroVars() Clean values from variables of RPC call
118: * @call = RPC function call
119: * return: -1 error, !=-1 Returned number of cleaned RPC variables
120: */
121: inline int
122: rpc_srv_zeroVars(rpc_func_t * __restrict call)
123: {
124: if (!call) {
125: rpc_SetErr(EINVAL, "Error:: Invalid parameter can`t delete variables ...\n");
126: return -1;
127: }
128:
129: io_arrayFree(call->func_vars);
130: io_arrayZero(call->func_vars);
131: return io_arraySize(call->func_vars);
132: }
133:
134: /*
135: * rpc_srv_copyVars() Copy variables for RPC call to new variable array
136: * @call = RPC function call
137: * @newvars = New allocated variables array, must be free after use
138: * return: -1 error, !=-1 Returned number of copied RPC variables
139: */
140: inline int
141: rpc_srv_copyVars(rpc_func_t * __restrict call, array_t ** __restrict newvars)
142: {
143: if (!call || !newvars) {
144: rpc_SetErr(EINVAL, "Error:: Invalid parameter can`t copy variables to new array\n");
145: return -1;
146: }
147:
148: if (io_arrayCopy(newvars, call->func_vars) == -1)
149: return -1;
150:
151: return io_arraySize(*newvars);
152: }
153:
154: /*
155: * rpc_srv_getVars() Get variables array for RPC call
156: * @call = RPC function call
157: * @vars = Returned variables array, may be NULL
158: * return: -1 error, !=-1 Number of returned variables
159: */
160: inline int
161: rpc_srv_getVars(rpc_func_t * __restrict call, array_t ** __restrict vars)
162: {
163: if (!call) {
164: rpc_SetErr(EINVAL, "Error:: Invalid parameter can`t get variables ...\n");
165: return -1;
166: }
167:
168: if (vars)
169: *vars = call->func_vars;
170: return (call->func_vars ? io_arraySize(call->func_vars) : 0);
171: }
172:
173: // ---------------------------------------------------------
174:
175: /*
176: * rpc_srv_registerCall() Register call to RPC server
177: * @srv = RPC Server instance
178: * @csModule = Module name, if NULL self binary
179: * @csFunc = Function name
180: * @args = Number of return function arguments, use for restriction case!
181: * return: -1 error or 0 register ok
182: */
183: int
184: rpc_srv_registerCall(rpc_srv_t * __restrict srv, const char *csModule, const char *csFunc, u_short args)
185: {
186: rpc_func_t *func;
187: u_char str[MAXPATHLEN + UCHAR_MAX + 1];
188:
189: memset(str, 0, sizeof str);
190: if (!srv || !csFunc) {
191: rpc_SetErr(EINVAL, "Error:: Invalid parameter can`t register function to RPC server ...\n");
192: return -1;
193: }
194: if (!(func = malloc(sizeof(rpc_func_t)))) {
195: LOGERR;
196: return -1;
197: } else {
198: memset(func, 0, sizeof(rpc_func_t));
199: strlcpy((char*) func->func_name, csFunc, sizeof func->func_name);
200: }
201: if (csModule) {
202: strlcpy((char*) func->func_file, csModule, sizeof func->func_file);
203: strlcpy((char*) str, csModule, sizeof str);
204: }
205: strlcat((char*) str, "__", sizeof str);
206: strlcat((char*) str, csFunc, sizeof str);
207:
208: func->func_tag = crcFletcher16((u_short*) str, sizeof str / 2);
209: func->func_hash = hash_fnv((char*) str, sizeof str);
210:
211: func->func_parent = srv;
212:
213: if (args > 0 && rpc_srv_allocVars(func, args) == -1) {
214: free(func);
215: return -1;
216: }
217:
218: pthread_mutex_lock(&srv->srv_mtx);
219: func->func_next = srv->srv_funcs;
220: srv->srv_funcs = func;
221: pthread_mutex_unlock(&srv->srv_mtx);
222: return 0;
223: }
224:
225: /*
226: * rpc_srv_unregisterCall() Unregister call from RPC server
227: * @srv = RPC Server instance
228: * @csModule = Module name, if NULL self binary
229: * @csFunc = Function name
230: * return: -1 error, 0 not found call, 1 unregister ok
231: */
232: int
233: rpc_srv_unregisterCall(rpc_srv_t * __restrict srv, const char *csModule, const char *csFunc)
234: {
235: rpc_func_t func, *f, *curr;
236: u_char str[MAXPATHLEN + UCHAR_MAX + 1];
237:
238: memset(&func, 0, sizeof(rpc_func_t));
239: memset(str, 0, sizeof str);
240: if (!srv || !csFunc) {
241: rpc_SetErr(EINVAL, "Error:: Invalid parameter can`t unregister function from RPC server ...\n");
242: return -1;
243: } else
244: strlcpy((char*) func.func_name, csFunc, sizeof func.func_name);
245: if (csModule) {
246: strlcpy((char*) func.func_file, csModule, sizeof func.func_file);
247: strlcpy((char*) str, csModule, sizeof str);
248: }
249: strlcat((char*) str, "__", sizeof str);
250: strlcat((char*) str, csFunc, sizeof str);
251:
252: func.func_tag = crcFletcher16((u_short*) str, sizeof str / 2);
253: func.func_hash = hash_fnv((char*) str, sizeof str);
254:
255: f = rpc_srv_getCall(srv, func.func_tag, func.func_hash);
256: if (!f) /* not found element for unregister */
257: return 0;
258:
259: pthread_mutex_lock(&srv->srv_mtx);
260: if (srv->srv_funcs == f) { /* if is 1st element */
261: srv->srv_funcs = srv->srv_funcs->func_next;
262:
263: if (f->func_args && f->func_vars)
264: free(f->func_vars);
265: free(f);
266: } else {
267: for (curr = srv->srv_funcs; curr->func_next != f; curr = curr->func_next);
268: curr->func_next = curr->func_next->func_next;
269:
270: if (f->func_args && f->func_vars)
271: free(f->func_vars);
272: free(f);
273: }
274: pthread_mutex_unlock(&srv->srv_mtx);
275:
276: return 1;
277: }
278:
279: /*
280: * rpc_srv_getCall() Get registered call from RPC server
281: * @srv = RPC Server instance
282: * @tag = tag for function
283: * @hash = hash for function
284: * return: NULL not found call, !=NULL return call
285: */
286: inline rpc_func_t *
287: rpc_srv_getCall(rpc_srv_t * __restrict srv, uint16_t tag, uint32_t hash)
288: {
289: rpc_func_t *f;
290:
291: if (!srv) {
292: rpc_SetErr(EINVAL, "Error:: Invalid parameter can`t get function from RPC server ...\n");
293: return NULL;
294: }
295:
296: for (f = srv->srv_funcs; f; f = f->func_next)
297: if (f->func_tag == tag && f->func_hash == hash)
298: break;
299:
300: return f;
301: }
302:
303: /*
304: * rpc_srv_getFunc() Get registered call from RPC server by Name
305: * @srv = RPC Server instance
306: * @csModule = Module name, if NULL self binary
307: * @csFunc = Function name
308: * return: NULL not found call, !=NULL return call
309: */
310: rpc_func_t *
311: rpc_srv_getFunc(rpc_srv_t * __restrict srv, const char *csModule, const char *csFunc)
312: {
313: rpc_func_t func;
314: u_char str[MAXPATHLEN + UCHAR_MAX + 1];
315:
316: memset(&func, 0, sizeof(rpc_func_t));
317: memset(str, 0, sizeof str);
318: if (!srv || !csFunc) {
319: rpc_SetErr(EINVAL, "Error:: Invalid parameter can`t get function from RPC server ...\n");
320: return NULL;
321: } else
322: strlcpy((char*) func.func_name, csFunc, sizeof func.func_name);
323: if (csModule) {
324: strlcpy((char*) func.func_file, csModule, sizeof func.func_file);
325: strlcpy((char*) str, csModule, sizeof str);
326: }
327: strlcat((char*) str, "__", sizeof str);
328: strlcat((char*) str, csFunc, sizeof str);
329:
330: func.func_tag = crcFletcher16((u_short*) str, sizeof str / 2);
331: func.func_hash = hash_fnv((char*) str, sizeof str);
332:
333: return rpc_srv_getCall(srv, func.func_tag, func.func_hash);
334: }
335:
336: // ---------------------------------------------------------
337:
338: /*
339: * rpc_srv_getBLOB() Get registered BLOB
340: * @srv = RPC Server instance
341: * @var = hash for variable
342: * return: NULL not found, !=NULL return blob var
343: */
344: inline rpc_blob_t *
345: rpc_srv_getBLOB(rpc_srv_t * __restrict srv, uint32_t var)
346: {
347: rpc_blob_t *b;
348:
349: if (!srv) {
350: rpc_SetErr(EINVAL, "Error:: Invalid parameter can`t get variable from BLOB server ...\n");
351: return NULL;
352: }
353:
354: pthread_mutex_lock(&srv->srv_blob.mtx);
355: for (b = srv->srv_blob.blobs; b; b = b->blob_next) {
356: if (b->blob_var == var)
357: break;
358: }
359: pthread_mutex_unlock(&srv->srv_blob.mtx);
360:
361: return b;
362: }
363:
364: /*
365: * rpc_srv_registerBLOB() Register new BLOB to server
366: * @srv = RPC Server instance
367: * @len = BLOB length
368: * return: NULL error or new registered BLOB
369: */
370: rpc_blob_t *
371: rpc_srv_registerBLOB(rpc_srv_t * __restrict srv, size_t len)
372: {
373: rpc_blob_t *blob = NULL;
374:
375: if (!srv || !len) {
376: rpc_SetErr(EINVAL, "Error:: Invalid parameter can`t register BLOB to server ...\n");
377: return blob;
378: }
379:
380: blob = rpc_srv_blobCreate(srv, len);
381: if (blob) {
382: pthread_mutex_lock(&srv->srv_blob.mtx);
383: blob->blob_next = srv->srv_blob.blobs;
384: srv->srv_blob.blobs = blob;
385: pthread_mutex_unlock(&srv->srv_blob.mtx);
386: }
387:
388: return blob;
389: }
390:
391: /*
392: * rpc_srv_unregisterBLOB() Unregister BLOB from server
393: * @srv = RPC Server instance
394: * @var = BLOB Variable for unregister
395: * return: -1 error, 0 not found call, 1 unregister ok
396: */
397: int
398: rpc_srv_unregisterBLOB(rpc_srv_t * __restrict srv, uint32_t var)
399: {
400: rpc_blob_t *b, *curr;
401:
402: if (!srv) {
403: rpc_SetErr(EINVAL, "Error:: Invalid parameter can`t unregister BLOB from server ...\n");
404: return -1;
405: }
406:
407: b = rpc_srv_getBLOB(srv, var);
408: if (!b) /* not found element for unregister */
409: return 0;
410:
411: pthread_mutex_lock(&srv->srv_blob.mtx);
412: if (srv->srv_blob.blobs == b) { /* if is 1st element */
413: srv->srv_blob.blobs = srv->srv_blob.blobs->blob_next;
414: } else {
415: for (curr = srv->srv_blob.blobs; curr->blob_next != b; curr = curr->blob_next);
416: curr->blob_next = curr->blob_next->blob_next;
417: }
418: rpc_srv_blobFree(srv, b);
419: free(b);
420: pthread_mutex_unlock(&srv->srv_blob.mtx);
421:
422: return 1;
423: }
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