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 1.9 2012/05/14 08:39:06 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: func->func_next = srv->srv_funcs;
140: srv->srv_funcs = func;
141: return 0;
142: }
143:
144: /*
145: * rpc_srv_unregisterCall() - Unregister call from RPC server
146: *
147: * @srv = RPC Server instance
148: * @csModule = Module name, if NULL self binary
149: * @csFunc = Function name
150: * return: -1 error, 0 not found call, 1 unregister ok
151: */
152: int
153: rpc_srv_unregisterCall(rpc_srv_t * __restrict srv, const char *csModule, const char *csFunc)
154: {
155: rpc_func_t func, *f, *curr;
156:
157: if (!srv || !csFunc) {
158: rpc_SetErr(EINVAL, "Invalid parameter can`t unregister function");
159: return -1;
160: } else
161: memset(&func, 0, sizeof func);
162:
163: /* calculate hashes */
164: if (rpc_calcHashes(&func, csModule, csFunc) == -1)
165: return -1;
166:
167: f = rpc_srv_getCall(srv, func.func_tag, func.func_hash);
168: AIT_FREE_VAL(&func.func_name);
169: AIT_FREE_VAL(&func.func_file);
170: if (!f) /* not found element for unregister */
171: return 0;
172:
173: /* remove from list of functions */
174: if (srv->srv_funcs == f) /* if is 1st element */
175: srv->srv_funcs = srv->srv_funcs->func_next;
176: else {
177: for (curr = srv->srv_funcs; curr->func_next != f; curr = curr->func_next);
178: curr->func_next = curr->func_next->func_next;
179: }
180: io_freeVars(&f->func_vars);
181: AIT_FREE_VAL(&f->func_name);
182: AIT_FREE_VAL(&f->func_file);
183: free(f);
184:
185: return 1;
186: }
187:
188: /*
189: * rpc_srv_getCall() - Get registered call from RPC server
190: *
191: * @srv = RPC Server instance
192: * @tag = tag for function
193: * @hash = hash for function
194: * return: NULL not found call, !=NULL return call
195: */
196: inline rpc_func_t *
197: rpc_srv_getCall(rpc_srv_t * __restrict srv, uint16_t tag, uint32_t hash)
198: {
199: rpc_func_t *f;
200:
201: if (!srv) {
202: rpc_SetErr(EINVAL, "Invalid parameter can`t get function");
203: return NULL;
204: }
205:
206: for (f = srv->srv_funcs; f; f = f->func_next)
207: if (f->func_tag == tag && f->func_hash == hash)
208: break;
209:
210: return f;
211: }
212:
213: /*
214: * rpc_srv_getFunc() - Get registered call from RPC server by Name
215: *
216: * @srv = RPC Server instance
217: * @csModule = Module name, if NULL self binary
218: * @csFunc = Function name
219: * return: NULL not found call, !=NULL return call
220: */
221: rpc_func_t *
222: rpc_srv_getFunc(rpc_srv_t * __restrict srv, const char *csModule, const char *csFunc)
223: {
224: rpc_func_t func, *f = NULL;
225:
226: if (!srv || !csFunc) {
227: rpc_SetErr(EINVAL, "Invalid parameter can`t get function");
228: return NULL;
229: } else
230: memset(&func, 0, sizeof(rpc_func_t));
231:
232: /* calculate hashes */
233: if (rpc_calcHashes(&func, csModule, csFunc) == -1)
234: return NULL;
235:
236: f = rpc_srv_getCall(srv, func.func_tag, func.func_hash);
237:
238: AIT_FREE_VAL(&func.func_name);
239: AIT_FREE_VAL(&func.func_file);
240: return f;
241: }
242:
243: // ---------------------------------------------------------
244:
245: /*
246: * rpc_srv_getBLOB() - Get registered BLOB
247: *
248: * @srv = RPC Server instance
249: * @var = hash for variable
250: * return: NULL not found, !=NULL return blob var
251: */
252: inline rpc_blob_t *
253: rpc_srv_getBLOB(rpc_srv_t * __restrict srv, uint32_t var)
254: {
255: rpc_blob_t *b;
256:
257: if (!srv) {
258: rpc_SetErr(EINVAL, "Invalid parameter can`t get BLOB variable");
259: return NULL;
260: }
261:
262: for (b = srv->srv_blob.blobs; b; b = b->blob_next) {
263: if (b->blob_var == var)
264: break;
265: }
266:
267: return b;
268: }
269:
270: /*
271: * rpc_srv_registerBLOB() - Register new BLOB to server
272: *
273: * @srv = RPC Server instance
274: * @len = BLOB length
275: * return: NULL error or new registered BLOB
276: */
277: rpc_blob_t *
278: rpc_srv_registerBLOB(rpc_srv_t * __restrict srv, size_t len)
279: {
280: rpc_blob_t *blob = NULL;
281:
282: if (!srv || !len) {
283: rpc_SetErr(EINVAL, "Invalid parameter can`t register BLOB variable");
284: return blob;
285: }
286:
287: blob = rpc_srv_blobCreate(srv, len);
288: if (blob) {
289: blob->blob_next = srv->srv_blob.blobs;
290: srv->srv_blob.blobs = blob;
291: }
292:
293: return blob;
294: }
295:
296: /*
297: * rpc_srv_unregisterBLOB() - Unregister BLOB from server
298: *
299: * @srv = RPC Server instance
300: * @var = BLOB Variable for unregister
301: * return: -1 error, 0 not found call, 1 unregister ok
302: */
303: int
304: rpc_srv_unregisterBLOB(rpc_srv_t * __restrict srv, uint32_t var)
305: {
306: rpc_blob_t *b, *curr;
307:
308: if (!srv) {
309: rpc_SetErr(EINVAL, "Invalid parameter can`t unregister BLOB variable");
310: return -1;
311: }
312:
313: b = rpc_srv_getBLOB(srv, var);
314: if (!b) /* not found element for unregister */
315: return 0;
316: /* if BLOB is unmapped force to unmap object */
317: if (b->blob_data)
318: rpc_srv_blobUnmap(b);
319:
320: if (srv->srv_blob.blobs == b) { /* if is 1st element */
321: srv->srv_blob.blobs = srv->srv_blob.blobs->blob_next;
322: } else {
323: for (curr = srv->srv_blob.blobs; curr->blob_next != b; curr = curr->blob_next);
324: curr->blob_next = curr->blob_next->blob_next;
325: }
326: rpc_srv_blobFree(srv, b);
327: free(b);
328:
329: return 1;
330: }
331:
332: /*
333: * rpc_calcHashes() - Calculate hashes for RPC call
334: *
335: * @func = function
336: * @csModule = Module name, if NULL self binary
337: * @csFunc = Function name
338: * return: -1 error or 0 ok
339: */
340: int
341: rpc_calcHashes(rpc_func_t * __restrict func, const char *csModule, const char *csFunc)
342: {
343: char *str = NULL;
344: int len = 0;
345:
346: assert(func && csFunc);
347:
348: /* set function name */
349: AIT_SET_STR(&func->func_name, csFunc);
350: len = strlen(csFunc) + 3; /* extra 3 bytes, because add string "__" and 0 */
351: /* set module name if exists */
352: if (csModule) {
353: AIT_SET_STR(&func->func_file, csModule);
354: len += strlen(csModule);
355: }
356: /* align len to 2 */
357: len = io_align(len, 1);
358:
359: /* prepare hash source string */
360: str = malloc(len);
361: if (!str) {
362: LOGERR;
363: return -1;
364: } else {
365: memset(str, 0, len);
366: if (csModule)
367: strlcpy((char*) str, csModule, len);
368: strlcat((char*) str, "__", len);
369: strlcat((char*) str, csFunc, len);
370: }
371:
372: func->func_tag = crcFletcher16((u_short*) str, len / 2);
373: func->func_hash = hash_fnv((char*) str, len);
374:
375: free(str);
376: return len;
377: }
378:
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