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 1.4.2.3 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: #include "global.h"
47:
48:
49: /*
50: * rpc_srv_allocVars() Allocate array for call variables,
51: if already allocated memory for RPC call reallocate used space
52: * @call = RPC function call
53: * @varnum = Number of variables, if ==0 free previous allocated variables
54: * return: -1 error, !=-1 return varnum value
55: */
56: inline int
57: rpc_srv_allocVars(rpc_func_t * __restrict call, int varnum)
58: {
59: register int i;
60: ait_val_t *v;
61:
62: if (!call || varnum < 0) {
63: rpc_SetErr(EINVAL, "Error:: Invalid parameter can`t allocate variables for RPC call...\n");
64: return -1;
65: }
66:
67: if (varnum) {
68: call->func_vars = io_arrayInit(varnum);
69: if (!call->func_vars)
70: return -1;
71:
72: /* allocate ait_val_t elements & add to array */
73: for (i = 0; i < io_arraySize(call->func_vars); i++) {
74: v = malloc(sizeof(ait_val_t));
75: if (!v) {
76: LOGERR;
77: rpc_srv_destroyVars(call);
78: return -1;
79: } else {
80: memset(v, 0, sizeof(ait_val_t));
81: io_arraySet(call->func_vars, i, v);
82: }
83: }
84: }
85:
86: return io_arraySize(call->func_vars);
87: }
88:
89: /*
90: * rpc_srv_destroyVars() Destroy variables of array & array
91: * @call = RPC function call
92: * return: -1 error, !=-1 Returne remained variables
93: */
94: inline int
95: rpc_srv_destroyVars(rpc_func_t * __restrict call)
96: {
97: if (!call) {
98: rpc_SetErr(EINVAL, "Error:: Invalid parameter can`t delete variables ...\n");
99: return -1;
100: }
101:
102: if (call->func_vars) {
103: rpc_srv_freeVals(call);
104:
105: io_arrayFree(call->func_vars);
106: io_arrayDestroy(&call->func_vars);
107: }
108:
109: return io_arraySize(call->func_vars);
110: }
111:
112: /*
113: * rpc_srv_freeVals() Clean values from variables of array
114: * @call = RPC function call
115: * return: -1 error, !=-1 Returned number of cleaned variables
116: */
117: inline int
118: rpc_srv_freeVals(rpc_func_t * __restrict call)
119: {
120: register int i;
121:
122: if (!call) {
123: rpc_SetErr(EINVAL, "Error:: Invalid parameter can`t delete variables ...\n");
124: return -1;
125: }
126:
127: if (call->func_vars) {
128: for (i = 0; i < io_arraySize(call->func_vars); i++)
129: if (io_arrayGet(call->func_vars, i))
130: AIT_FREE_VAL(io_array(call->func_vars, i, ait_val_t*));
131: }
132:
133: return io_arraySize(call->func_vars);
134: }
135:
136: /*
137: * rpc_srv_copyVars() Copy variables for RPC call to new variable array
138: * @call = RPC function call
139: * @newvars = New allocated variables array, must be free after use
140: * return: -1 error, !=-1 Returned number of copied RPC variables
141: */
142: inline int
143: rpc_srv_copyVars(rpc_func_t * __restrict call, array_t ** __restrict newvars)
144: {
145: if (!call || !newvars) {
146: rpc_SetErr(EINVAL, "Error:: Invalid parameter can`t copy variables to new array\n");
147: return -1;
148: }
149:
150: if (io_arrayCopy(newvars, call->func_vars) == -1)
151: return -1;
152:
153: return io_arraySize(*newvars);
154: }
155:
156: /*
157: * rpc_srv_getVars() Get variables array for RPC call
158: * @call = RPC function call
159: * @vars = Returned variables array, may be NULL
160: * return: -1 error, !=-1 Number of returned variables
161: */
162: inline int
163: rpc_srv_getVars(rpc_func_t * __restrict call, array_t ** __restrict vars)
164: {
165: if (!call) {
166: rpc_SetErr(EINVAL, "Error:: Invalid parameter can`t get variables ...\n");
167: return -1;
168: }
169:
170: if (vars)
171: *vars = call->func_vars;
172: return io_arraySize(call->func_vars);
173: }
174:
175: // ---------------------------------------------------------
176:
177: /*
178: * rpc_srv_registerCall() Register call to RPC server
179: * @srv = RPC Server instance
180: * @csModule = Module name, if NULL self binary
181: * @csFunc = Function name
182: * @args = Number of return function arguments, use for restriction case!
183: * return: -1 error or 0 register ok
184: */
185: int
186: rpc_srv_registerCall(rpc_srv_t * __restrict srv, const char *csModule, const char *csFunc, u_short args)
187: {
188: rpc_func_t *func;
189: u_char str[MAXPATHLEN + UCHAR_MAX + 1];
190:
191: memset(str, 0, sizeof str);
192: if (!srv || !csFunc) {
193: rpc_SetErr(EINVAL, "Error:: Invalid parameter can`t register function to RPC server ...\n");
194: return -1;
195: }
196: if (!(func = malloc(sizeof(rpc_func_t)))) {
197: LOGERR;
198: return -1;
199: } else {
200: memset(func, 0, sizeof(rpc_func_t));
201: strlcpy((char*) func->func_name, csFunc, sizeof func->func_name);
202: }
203: if (csModule) {
204: strlcpy((char*) func->func_file, csModule, sizeof func->func_file);
205: strlcpy((char*) str, csModule, sizeof str);
206: }
207: strlcat((char*) str, "__", sizeof str);
208: strlcat((char*) str, csFunc, sizeof str);
209:
210: func->func_tag = crcFletcher16((u_short*) str, sizeof str / 2);
211: func->func_hash = hash_fnv((char*) str, sizeof str);
212:
213: func->func_parent = srv;
214:
215: if (args > 0 && rpc_srv_allocVars(func, args) == -1) {
216: free(func);
217: return -1;
218: }
219:
220: pthread_mutex_lock(&srv->srv_mtx);
221: func->func_next = srv->srv_funcs;
222: srv->srv_funcs = func;
223: pthread_mutex_unlock(&srv->srv_mtx);
224: return 0;
225: }
226:
227: /*
228: * rpc_srv_unregisterCall() Unregister call from RPC server
229: * @srv = RPC Server instance
230: * @csModule = Module name, if NULL self binary
231: * @csFunc = Function name
232: * return: -1 error, 0 not found call, 1 unregister ok
233: */
234: int
235: rpc_srv_unregisterCall(rpc_srv_t * __restrict srv, const char *csModule, const char *csFunc)
236: {
237: rpc_func_t func, *f, *curr;
238: u_char str[MAXPATHLEN + UCHAR_MAX + 1];
239:
240: memset(&func, 0, sizeof(rpc_func_t));
241: memset(str, 0, sizeof str);
242: if (!srv || !csFunc) {
243: rpc_SetErr(EINVAL, "Error:: Invalid parameter can`t unregister function from RPC server ...\n");
244: return -1;
245: } else
246: strlcpy((char*) func.func_name, csFunc, sizeof func.func_name);
247: if (csModule) {
248: strlcpy((char*) func.func_file, csModule, sizeof func.func_file);
249: strlcpy((char*) str, csModule, sizeof str);
250: }
251: strlcat((char*) str, "__", sizeof str);
252: strlcat((char*) str, csFunc, sizeof str);
253:
254: func.func_tag = crcFletcher16((u_short*) str, sizeof str / 2);
255: func.func_hash = hash_fnv((char*) str, sizeof str);
256:
257: f = rpc_srv_getCall(srv, func.func_tag, func.func_hash);
258: if (!f) /* not found element for unregister */
259: return 0;
260:
261: pthread_mutex_lock(&srv->srv_mtx);
262: if (srv->srv_funcs == f) { /* if is 1st element */
263: srv->srv_funcs = srv->srv_funcs->func_next;
264:
265: if (f->func_vars)
266: rpc_srv_destroyVars(f);
267: free(f);
268: } else {
269: for (curr = srv->srv_funcs; curr->func_next != f; curr = curr->func_next);
270: curr->func_next = curr->func_next->func_next;
271:
272: if (f->func_vars)
273: rpc_srv_destroyVars(f);
274: free(f);
275: }
276: pthread_mutex_unlock(&srv->srv_mtx);
277:
278: return 1;
279: }
280:
281: /*
282: * rpc_srv_getCall() Get registered call from RPC server
283: * @srv = RPC Server instance
284: * @tag = tag for function
285: * @hash = hash for function
286: * return: NULL not found call, !=NULL return call
287: */
288: inline rpc_func_t *
289: rpc_srv_getCall(rpc_srv_t * __restrict srv, uint16_t tag, uint32_t hash)
290: {
291: rpc_func_t *f;
292:
293: if (!srv) {
294: rpc_SetErr(EINVAL, "Error:: Invalid parameter can`t get function from RPC server ...\n");
295: return NULL;
296: }
297:
298: for (f = srv->srv_funcs; f; f = f->func_next)
299: if (f->func_tag == tag && f->func_hash == hash)
300: break;
301:
302: return f;
303: }
304:
305: /*
306: * rpc_srv_getFunc() Get registered call from RPC server by Name
307: * @srv = RPC Server instance
308: * @csModule = Module name, if NULL self binary
309: * @csFunc = Function name
310: * return: NULL not found call, !=NULL return call
311: */
312: rpc_func_t *
313: rpc_srv_getFunc(rpc_srv_t * __restrict srv, const char *csModule, const char *csFunc)
314: {
315: rpc_func_t func;
316: u_char str[MAXPATHLEN + UCHAR_MAX + 1];
317:
318: memset(&func, 0, sizeof(rpc_func_t));
319: memset(str, 0, sizeof str);
320: if (!srv || !csFunc) {
321: rpc_SetErr(EINVAL, "Error:: Invalid parameter can`t get function from RPC server ...\n");
322: return NULL;
323: } else
324: strlcpy((char*) func.func_name, csFunc, sizeof func.func_name);
325: if (csModule) {
326: strlcpy((char*) func.func_file, csModule, sizeof func.func_file);
327: strlcpy((char*) str, csModule, sizeof str);
328: }
329: strlcat((char*) str, "__", sizeof str);
330: strlcat((char*) str, csFunc, sizeof str);
331:
332: func.func_tag = crcFletcher16((u_short*) str, sizeof str / 2);
333: func.func_hash = hash_fnv((char*) str, sizeof str);
334:
335: return rpc_srv_getCall(srv, func.func_tag, func.func_hash);
336: }
337:
338: // ---------------------------------------------------------
339:
340: /*
341: * rpc_srv_getBLOB() Get registered BLOB
342: * @srv = RPC Server instance
343: * @var = hash for variable
344: * return: NULL not found, !=NULL return blob var
345: */
346: inline rpc_blob_t *
347: rpc_srv_getBLOB(rpc_srv_t * __restrict srv, uint32_t var)
348: {
349: rpc_blob_t *b;
350:
351: if (!srv) {
352: rpc_SetErr(EINVAL, "Error:: Invalid parameter can`t get variable from BLOB server ...\n");
353: return NULL;
354: }
355:
356: pthread_mutex_lock(&srv->srv_blob.mtx);
357: for (b = srv->srv_blob.blobs; b; b = b->blob_next) {
358: if (b->blob_var == var)
359: break;
360: }
361: pthread_mutex_unlock(&srv->srv_blob.mtx);
362:
363: return b;
364: }
365:
366: /*
367: * rpc_srv_registerBLOB() Register new BLOB to server
368: * @srv = RPC Server instance
369: * @len = BLOB length
370: * return: NULL error or new registered BLOB
371: */
372: rpc_blob_t *
373: rpc_srv_registerBLOB(rpc_srv_t * __restrict srv, size_t len)
374: {
375: rpc_blob_t *blob = NULL;
376:
377: if (!srv || !len) {
378: rpc_SetErr(EINVAL, "Error:: Invalid parameter can`t register BLOB to server ...\n");
379: return blob;
380: }
381:
382: blob = rpc_srv_blobCreate(srv, len);
383: if (blob) {
384: pthread_mutex_lock(&srv->srv_blob.mtx);
385: blob->blob_next = srv->srv_blob.blobs;
386: srv->srv_blob.blobs = blob;
387: pthread_mutex_unlock(&srv->srv_blob.mtx);
388: }
389:
390: return blob;
391: }
392:
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
400: rpc_srv_unregisterBLOB(rpc_srv_t * __restrict srv, uint32_t var)
401: {
402: rpc_blob_t *b, *curr;
403:
404: if (!srv) {
405: rpc_SetErr(EINVAL, "Error:: Invalid parameter can`t unregister BLOB from server ...\n");
406: return -1;
407: }
408:
409: b = rpc_srv_getBLOB(srv, var);
410: if (!b) /* not found element for unregister */
411: return 0;
412:
413: pthread_mutex_lock(&srv->srv_blob.mtx);
414: if (srv->srv_blob.blobs == b) { /* if is 1st element */
415: srv->srv_blob.blobs = srv->srv_blob.blobs->blob_next;
416: } else {
417: for (curr = srv->srv_blob.blobs; curr->blob_next != b; curr = curr->blob_next);
418: curr->blob_next = curr->blob_next->blob_next;
419: }
420: rpc_srv_blobFree(srv, b);
421: free(b);
422: pthread_mutex_unlock(&srv->srv_blob.mtx);
423:
424: return 1;
425: }
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