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 1.6.2.1 2012/03/12 16:28:09 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: static inline int
94: calcHashes(rpc_func_t * __restrict func, const char *csModule, const char *csFunc)
95: {
96: char *str = NULL;
97: int len = 0;
98:
99: assert(func && csFunc);
100:
101: /* set function name */
102: func->func_name = (u_char*) csFunc;
103: len = strlen(csFunc) + 3; /* extra 3 bytes, because add string "__" and 0 */
104: /* set module name if exists */
105: if (csModule) {
106: func->func_file = (u_char*) csModule;
107: len += strlen(csModule);
108: }
109: /* align len to 2 */
110: len = (len + 1) & ~1;
111:
112: /* prepare hash source string */
113: str = malloc(len);
114: if (!str) {
115: LOGERR;
116: return -1;
117: } else {
118: memset(str, 0, len);
119: if (func->func_file)
120: strlcpy((char*) str, csModule, len);
121: strlcat((char*) str, "__", len);
122: strlcat((char*) str, csFunc, len);
123: }
124:
125: func->func_tag = crcFletcher16((u_short*) str, len / 2);
126: func->func_hash = hash_fnv((char*) str, len);
127:
128: free(str);
129: return len;
130: }
131:
132: // ---------------------------------------------------------
133:
134: /*
135: * rpc_srv_registerCall() - Register call to RPC server
136: *
137: * @srv = RPC Server instance
138: * @csModule = Module name, if NULL self binary
139: * @csFunc = Function name
140: * @args = Number of return function arguments, use for restriction case!
141: * return: -1 error or 0 register ok
142: */
143: int
144: rpc_srv_registerCall(rpc_srv_t * __restrict srv, const char *csModule,
145: const char *csFunc, u_short args)
146: {
147: rpc_func_t *func;
148:
149: if (!srv || !csFunc) {
150: rpc_SetErr(EINVAL, "Invalid parameter can`t register function");
151: return -1;
152: }
153: if (!(func = malloc(sizeof(rpc_func_t)))) {
154: LOGERR;
155: return -1;
156: } else
157: memset(func, 0, sizeof(rpc_func_t));
158:
159: /* set function name */
160: func->func_name = strdup(csFunc);
161: /* set module name if exists */
162: if (csModule)
163: func->func_file = strdup(csModule);
164:
165: /* calculate hashes */
166: if (calcHashes(func, func->func_file, func->func_name) == -1) {
167: free(func->func_name);
168: if (func->func_file)
169: free(func->func_file);
170: free(func);
171: return -1;
172: }
173:
174: func->func_parent = srv;
175:
176: /* allocate return variables */
177: if (args > 0 && rpc_srv_allocVars(func, args) == -1) {
178: free(func->func_name);
179: if (func->func_file)
180: free(func->func_file);
181: free(func);
182: return -1;
183: }
184:
185: /* add to list of functions */
186: pthread_mutex_lock(&srv->srv_mtx);
187: func->func_next = srv->srv_funcs;
188: srv->srv_funcs = func;
189: pthread_mutex_unlock(&srv->srv_mtx);
190: return 0;
191: }
192:
193: /*
194: * rpc_srv_unregisterCall() - Unregister call from RPC server
195: *
196: * @srv = RPC Server instance
197: * @csModule = Module name, if NULL self binary
198: * @csFunc = Function name
199: * return: -1 error, 0 not found call, 1 unregister ok
200: */
201: int
202: rpc_srv_unregisterCall(rpc_srv_t * __restrict srv, const char *csModule, const char *csFunc)
203: {
204: rpc_func_t func, *f, *curr;
205:
206: if (!srv || !csFunc) {
207: rpc_SetErr(EINVAL, "Invalid parameter can`t unregister function");
208: return -1;
209: } else
210: memset(&func, 0, sizeof func);
211:
212: /* calculate hashes */
213: if (calcHashes(&func, csModule, csFunc) == -1)
214: return -1;
215:
216: pthread_mutex_lock(&srv->srv_mtx);
217: f = rpc_srv_getCall(srv, func.func_tag, func.func_hash);
218: if (!f) /* not found element for unregister */
219: return 0;
220:
221: /* remove from list of functions */
222: if (srv->srv_funcs == f) /* if is 1st element */
223: srv->srv_funcs = srv->srv_funcs->func_next;
224: else {
225: for (curr = srv->srv_funcs; curr->func_next != f; curr = curr->func_next);
226: curr->func_next = curr->func_next->func_next;
227: }
228: io_freeVars(&f->func_vars);
229: free(f);
230: pthread_mutex_unlock(&srv->srv_mtx);
231:
232: return 1;
233: }
234:
235: /*
236: * rpc_srv_getCall() - Get registered call from RPC server
237: *
238: * @srv = RPC Server instance
239: * @tag = tag for function
240: * @hash = hash for function
241: * return: NULL not found call, !=NULL return call
242: */
243: inline rpc_func_t *
244: rpc_srv_getCall(rpc_srv_t * __restrict srv, uint16_t tag, uint32_t hash)
245: {
246: rpc_func_t *f;
247:
248: if (!srv) {
249: rpc_SetErr(EINVAL, "Invalid parameter can`t get function");
250: return NULL;
251: }
252:
253: for (f = srv->srv_funcs; f; f = f->func_next)
254: if (f->func_tag == tag && f->func_hash == hash)
255: break;
256:
257: return f;
258: }
259:
260: /*
261: * rpc_srv_getFunc() - Get registered call from RPC server by Name
262: *
263: * @srv = RPC Server instance
264: * @csModule = Module name, if NULL self binary
265: * @csFunc = Function name
266: * return: NULL not found call, !=NULL return call
267: */
268: rpc_func_t *
269: rpc_srv_getFunc(rpc_srv_t * __restrict srv, const char *csModule, const char *csFunc)
270: {
271: rpc_func_t func;
272:
273: if (!srv || !csFunc) {
274: rpc_SetErr(EINVAL, "Invalid parameter can`t get function");
275: return NULL;
276: } else
277: memset(&func, 0, sizeof(rpc_func_t));
278:
279: /* calculate hashes */
280: if (calcHashes(&func, csModule, csFunc) == -1)
281: return NULL;
282:
283: return rpc_srv_getCall(srv, func.func_tag, func.func_hash);
284: }
285:
286: // ---------------------------------------------------------
287:
288: /*
289: * rpc_srv_getBLOB() - Get registered BLOB
290: *
291: * @srv = RPC Server instance
292: * @var = hash for variable
293: * return: NULL not found, !=NULL return blob var
294: */
295: inline rpc_blob_t *
296: rpc_srv_getBLOB(rpc_srv_t * __restrict srv, uint32_t var)
297: {
298: rpc_blob_t *b;
299:
300: if (!srv) {
301: rpc_SetErr(EINVAL, "Invalid parameter can`t get BLOB variable");
302: return NULL;
303: }
304:
305: for (b = srv->srv_blob.blobs; b; b = b->blob_next) {
306: if (b->blob_var == var)
307: break;
308: }
309:
310: return b;
311: }
312:
313: /*
314: * rpc_srv_registerBLOB() - Register new BLOB to server
315: *
316: * @srv = RPC Server instance
317: * @len = BLOB length
318: * return: NULL error or new registered BLOB
319: */
320: rpc_blob_t *
321: rpc_srv_registerBLOB(rpc_srv_t * __restrict srv, size_t len)
322: {
323: rpc_blob_t *blob = NULL;
324:
325: if (!srv || !len) {
326: rpc_SetErr(EINVAL, "Invalid parameter can`t register BLOB variable");
327: return blob;
328: }
329:
330: blob = rpc_srv_blobCreate(srv, len);
331: if (blob) {
332: pthread_mutex_lock(&srv->srv_blob.mtx);
333: blob->blob_next = srv->srv_blob.blobs;
334: srv->srv_blob.blobs = blob;
335: pthread_mutex_unlock(&srv->srv_blob.mtx);
336: }
337:
338: return blob;
339: }
340:
341: /*
342: * rpc_srv_unregisterBLOB() - Unregister BLOB from server
343: *
344: * @srv = RPC Server instance
345: * @var = BLOB Variable for unregister
346: * return: -1 error, 0 not found call, 1 unregister ok
347: */
348: int
349: rpc_srv_unregisterBLOB(rpc_srv_t * __restrict srv, uint32_t var)
350: {
351: rpc_blob_t *b, *curr;
352:
353: if (!srv) {
354: rpc_SetErr(EINVAL, "Invalid parameter can`t unregister BLOB variable");
355: return -1;
356: }
357:
358: b = rpc_srv_getBLOB(srv, var);
359: if (!b) /* not found element for unregister */
360: return 0;
361: /* if BLOB is unmapped force to unmap object */
362: if (b->blob_data)
363: rpc_srv_blobUnmap(b);
364:
365: pthread_mutex_lock(&srv->srv_blob.mtx);
366: if (srv->srv_blob.blobs == b) { /* if is 1st element */
367: srv->srv_blob.blobs = srv->srv_blob.blobs->blob_next;
368: } else {
369: for (curr = srv->srv_blob.blobs; curr->blob_next != b; curr = curr->blob_next);
370: curr->blob_next = curr->blob_next->blob_next;
371: }
372: pthread_mutex_unlock(&srv->srv_blob.mtx);
373: rpc_srv_blobFree(srv, b);
374: free(b);
375:
376: return 1;
377: }
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