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 1.8 2012/03/29 01:34:16 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: #include "global.h"
47:
48:
49: /*
50: * rpc_srv_allocVars() - Allocate array for call variables
51: *
52: * @call = RPC function call
53: * @varnum = Number of variables, if ==0 return already allocated variables number
54: * return: -1 error, !=-1 return varnum value
55: */
56: static inline int
57: rpc_srv_allocVars(rpc_func_t * __restrict call, int varnum)
58: {
59: if (!call || varnum < 0) {
60: rpc_SetErr(EINVAL, "Invalid parameter can`t allocate variables for RPC call");
61: return -1;
62: }
63:
64: if (varnum) {
65: call->func_vars = io_allocVars(varnum);
66: if (!call->func_vars)
67: return -1;
68: }
69:
70: return io_arraySize(call->func_vars);
71: }
72:
73: /*
74: * rpc_srv_getVars() - Get variables array for RPC call
75: *
76: * @call = RPC function call
77: * @vars = Returned variables array, may be NULL
78: * return: -1 error, !=-1 Number of returned variables
79: */
80: inline int
81: rpc_srv_getVars(rpc_func_t * __restrict call, array_t ** __restrict vars)
82: {
83: if (!call) {
84: rpc_SetErr(EINVAL, "Invalid parameter can`t get variables");
85: return -1;
86: }
87:
88: if (vars)
89: *vars = call->func_vars;
90: return io_arraySize(call->func_vars);
91: }
92:
93: /* --------------------------------------------------------- */
94:
95: /*
96: * rpc_srv_registerCall() - Register call to RPC server
97: *
98: * @srv = RPC Server instance
99: * @csModule = Module name, if NULL self binary
100: * @csFunc = Function name
101: * @args = Number of return function arguments, use for restriction case!
102: * return: -1 error or 0 register ok
103: */
104: int
105: rpc_srv_registerCall(rpc_srv_t * __restrict srv, const char *csModule,
106: const char *csFunc, u_short args)
107: {
108: rpc_func_t *func;
109:
110: if (!srv || !csFunc) {
111: rpc_SetErr(EINVAL, "Invalid parameter can`t register function");
112: return -1;
113: }
114: if (!(func = malloc(sizeof(rpc_func_t)))) {
115: LOGERR;
116: return -1;
117: } else
118: memset(func, 0, sizeof(rpc_func_t));
119:
120: /* calculate hashes */
121: if (rpc_calcHashes(func, csModule, csFunc) == -1) {
122: AIT_FREE_VAL(&func->func_name);
123: AIT_FREE_VAL(&func->func_file);
124: free(func);
125: return -1;
126: }
127:
128: func->func_parent = srv;
129:
130: /* allocate return variables */
131: if (args > 0 && rpc_srv_allocVars(func, args) == -1) {
132: AIT_FREE_VAL(&func->func_name);
133: AIT_FREE_VAL(&func->func_file);
134: free(func);
135: return -1;
136: }
137:
138: /* add to list of functions */
139: pthread_mutex_lock(&srv->srv_mtx);
140: func->func_next = srv->srv_funcs;
141: srv->srv_funcs = func;
142: pthread_mutex_unlock(&srv->srv_mtx);
143: return 0;
144: }
145:
146: /*
147: * rpc_srv_unregisterCall() - Unregister call from RPC server
148: *
149: * @srv = RPC Server instance
150: * @csModule = Module name, if NULL self binary
151: * @csFunc = Function name
152: * return: -1 error, 0 not found call, 1 unregister ok
153: */
154: int
155: rpc_srv_unregisterCall(rpc_srv_t * __restrict srv, const char *csModule, const char *csFunc)
156: {
157: rpc_func_t func, *f, *curr;
158:
159: if (!srv || !csFunc) {
160: rpc_SetErr(EINVAL, "Invalid parameter can`t unregister function");
161: return -1;
162: } else
163: memset(&func, 0, sizeof func);
164:
165: /* calculate hashes */
166: if (rpc_calcHashes(&func, csModule, csFunc) == -1)
167: return -1;
168:
169: pthread_mutex_lock(&srv->srv_mtx);
170: f = rpc_srv_getCall(srv, func.func_tag, func.func_hash);
171: AIT_FREE_VAL(&func.func_name);
172: AIT_FREE_VAL(&func.func_file);
173: if (!f) { /* not found element for unregister */
174: pthread_mutex_unlock(&srv->srv_mtx);
175: return 0;
176: }
177:
178: /* remove from list of functions */
179: if (srv->srv_funcs == f) /* if is 1st element */
180: srv->srv_funcs = srv->srv_funcs->func_next;
181: else {
182: for (curr = srv->srv_funcs; curr->func_next != f; curr = curr->func_next);
183: curr->func_next = curr->func_next->func_next;
184: }
185: io_freeVars(&f->func_vars);
186: AIT_FREE_VAL(&f->func_name);
187: AIT_FREE_VAL(&f->func_file);
188: free(f);
189: pthread_mutex_unlock(&srv->srv_mtx);
190:
191: return 1;
192: }
193:
194: /*
195: * rpc_srv_getCall() - Get registered call from RPC server
196: *
197: * @srv = RPC Server instance
198: * @tag = tag for function
199: * @hash = hash for function
200: * return: NULL not found call, !=NULL return call
201: */
202: inline rpc_func_t *
203: rpc_srv_getCall(rpc_srv_t * __restrict srv, uint16_t tag, uint32_t hash)
204: {
205: rpc_func_t *f;
206:
207: if (!srv) {
208: rpc_SetErr(EINVAL, "Invalid parameter can`t get function");
209: return NULL;
210: }
211:
212: for (f = srv->srv_funcs; f; f = f->func_next)
213: if (f->func_tag == tag && f->func_hash == hash)
214: break;
215:
216: return f;
217: }
218:
219: /*
220: * rpc_srv_getFunc() - Get registered call from RPC server by Name
221: *
222: * @srv = RPC Server instance
223: * @csModule = Module name, if NULL self binary
224: * @csFunc = Function name
225: * return: NULL not found call, !=NULL return call
226: */
227: rpc_func_t *
228: rpc_srv_getFunc(rpc_srv_t * __restrict srv, const char *csModule, const char *csFunc)
229: {
230: rpc_func_t func, *f = NULL;
231:
232: if (!srv || !csFunc) {
233: rpc_SetErr(EINVAL, "Invalid parameter can`t get function");
234: return NULL;
235: } else
236: memset(&func, 0, sizeof(rpc_func_t));
237:
238: /* calculate hashes */
239: if (rpc_calcHashes(&func, csModule, csFunc) == -1)
240: return NULL;
241:
242: f = rpc_srv_getCall(srv, func.func_tag, func.func_hash);
243:
244: AIT_FREE_VAL(&func.func_name);
245: AIT_FREE_VAL(&func.func_file);
246: return f;
247: }
248:
249: // ---------------------------------------------------------
250:
251: /*
252: * rpc_srv_getBLOB() - Get registered BLOB
253: *
254: * @srv = RPC Server instance
255: * @var = hash for variable
256: * return: NULL not found, !=NULL return blob var
257: */
258: inline rpc_blob_t *
259: rpc_srv_getBLOB(rpc_srv_t * __restrict srv, uint32_t var)
260: {
261: rpc_blob_t *b;
262:
263: if (!srv) {
264: rpc_SetErr(EINVAL, "Invalid parameter can`t get BLOB variable");
265: return NULL;
266: }
267:
268: for (b = srv->srv_blob.blobs; b; b = b->blob_next) {
269: if (b->blob_var == var)
270: break;
271: }
272:
273: return b;
274: }
275:
276: /*
277: * rpc_srv_registerBLOB() - Register new BLOB to server
278: *
279: * @srv = RPC Server instance
280: * @len = BLOB length
281: * return: NULL error or new registered BLOB
282: */
283: rpc_blob_t *
284: rpc_srv_registerBLOB(rpc_srv_t * __restrict srv, size_t len)
285: {
286: rpc_blob_t *blob = NULL;
287:
288: if (!srv || !len) {
289: rpc_SetErr(EINVAL, "Invalid parameter can`t register BLOB variable");
290: return blob;
291: }
292:
293: blob = rpc_srv_blobCreate(srv, len);
294: if (blob) {
295: pthread_mutex_lock(&srv->srv_blob.mtx);
296: blob->blob_next = srv->srv_blob.blobs;
297: srv->srv_blob.blobs = blob;
298: pthread_mutex_unlock(&srv->srv_blob.mtx);
299: }
300:
301: return blob;
302: }
303:
304: /*
305: * rpc_srv_unregisterBLOB() - Unregister BLOB from server
306: *
307: * @srv = RPC Server instance
308: * @var = BLOB Variable for unregister
309: * return: -1 error, 0 not found call, 1 unregister ok
310: */
311: int
312: rpc_srv_unregisterBLOB(rpc_srv_t * __restrict srv, uint32_t var)
313: {
314: rpc_blob_t *b, *curr;
315:
316: if (!srv) {
317: rpc_SetErr(EINVAL, "Invalid parameter can`t unregister BLOB variable");
318: return -1;
319: }
320:
321: b = rpc_srv_getBLOB(srv, var);
322: if (!b) /* not found element for unregister */
323: return 0;
324: /* if BLOB is unmapped force to unmap object */
325: if (b->blob_data)
326: rpc_srv_blobUnmap(b);
327:
328: pthread_mutex_lock(&srv->srv_blob.mtx);
329: if (srv->srv_blob.blobs == b) { /* if is 1st element */
330: srv->srv_blob.blobs = srv->srv_blob.blobs->blob_next;
331: } else {
332: for (curr = srv->srv_blob.blobs; curr->blob_next != b; curr = curr->blob_next);
333: curr->blob_next = curr->blob_next->blob_next;
334: }
335: pthread_mutex_unlock(&srv->srv_blob.mtx);
336: rpc_srv_blobFree(srv, b);
337: free(b);
338:
339: return 1;
340: }
341:
342: /*
343: * rpc_calcHashes() - Calculate hashes for RPC call
344: *
345: * @func = function
346: * @csModule = Module name, if NULL self binary
347: * @csFunc = Function name
348: * return: -1 error or 0 ok
349: */
350: int
351: rpc_calcHashes(rpc_func_t * __restrict func, const char *csModule, const char *csFunc)
352: {
353: char *str = NULL;
354: int len = 0;
355:
356: assert(func && csFunc);
357:
358: /* set function name */
359: AIT_SET_STR(&func->func_name, csFunc);
360: len = strlen(csFunc) + 3; /* extra 3 bytes, because add string "__" and 0 */
361: /* set module name if exists */
362: if (csModule) {
363: AIT_SET_STR(&func->func_file, csModule);
364: len += strlen(csModule);
365: }
366: /* align len to 2 */
367: len = io_align(len, 1);
368:
369: /* prepare hash source string */
370: str = malloc(len);
371: if (!str) {
372: LOGERR;
373: return -1;
374: } else {
375: memset(str, 0, len);
376: if (csModule)
377: strlcpy((char*) str, csModule, len);
378: strlcat((char*) str, "__", len);
379: strlcat((char*) str, csFunc, len);
380: }
381:
382: func->func_tag = crcFletcher16((u_short*) str, len / 2);
383: func->func_hash = hash_fnv((char*) str, len);
384:
385: free(str);
386: return len;
387: }
388:
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