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1.1 misho 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: aitcli.c,v 1.2.2.17 2010/06/09 09:32:30 misho Exp $
7: *
8: *************************************************************************/
9: #include "global.h"
10:
11:
12: static void *
13: rpc_srv_dispatchCall(void *arg)
14: {
15: rpc_cli_t *c = arg;
16: rpc_srv_t *s;
17: rpc_val_t *vals, *v = NULL;
18: rpc_func_t *f;
19: struct tagRPCCall *rpc;
20: struct tagRPCRet rrpc;
21: fd_set fds;
22: u_char buf[BUFSIZ], *data;
23: int ret, argc, Limit = 0;
24: register int i;
25:
26: if (!arg) {
27: rpc_SetErr(EINVAL, "Error:: Invalid parameter can`t procced RPC client ...\n");
28: return NULL;
29: } else
30: s = c->cli_parent;
31:
32: do {
33: FD_ZERO(&fds);
34: FD_SET(c->cli_sock, &fds);
35: ret = select(c->cli_sock + 1, &fds, NULL, NULL, NULL);
36: if (ret == -1) {
37: ret = -2;
38: }
39: memset(&rrpc, 0, sizeof rrpc);
40: memset(buf, 0, BUFSIZ);
41: if ((ret = recv(c->cli_sock, buf, BUFSIZ, 0)) == -1) {
42: LOGERR;
43: ret = -3;
44: break;
45: }
46: if (!ret) { // receive EOF
47: ret = 0;
48: break;
49: }
50: if (ret < sizeof(struct tagRPCCall)) {
51: rpc_SetErr(EMSGSIZE, "Error:: too short RPC packet ...\n");
52: ret = -4;
53: break;
54: } else
55: rpc = (struct tagRPCCall*) buf;
56: // check RPC packet session info
57: if (memcmp(&rpc->call_session, &s->srv_session, sizeof rpc->call_session)) {
58: rpc_SetErr(EINVAL, "Error:: get invalid RPC session ...\n");
59: ret = -5;
60: break;
61: }
62: // RPC is OK! Go decapsulate variables ...
63: if (rpc->call_argc) {
64: v = (rpc_val_t*) (buf + sizeof(struct tagRPCCall));
65: // RPC received variables types OK!
66: data = (u_char*) v + rpc->call_argc * sizeof(rpc_val_t);
67: for (i = 0; i < rpc->call_argc; i++) {
68: switch (v[i].val_type) {
69: case buffer:
70: v[i].val.buffer = data;
71: data += v[i].val_len;
72: break;
73: case string:
74: v[i].val.string = (int8_t*) data;
75: data += v[i].val_len + 1;
76: break;
77: case array:
78: v[i].val.array = (int8_t**) data;
79: data += v[i].val_len;
80: break;
81: default:
82: break;
83: }
84: }
85: }
86:
87: argc = 0;
88: vals = NULL;
89: if (!(f = rpc_srv_getCall(s, rpc->call_tag, rpc->call_hash))) {
90: rpc_SetErr(EINVAL, "Error:: call not found into RPC server ...\n");
91: ret = -6;
92: } else
93: if ((ret = rpc_srv_execCall(s, f, rpc, v)) == -1)
94: ret = -6;
95: else
96: argc = rpc_srv_getValsCall(f, &vals);
97:
98: memcpy(&rrpc.ret_session, &rpc->call_session, sizeof rrpc.ret_session);
99: rrpc.ret_tag = rpc->call_tag;
100: rrpc.ret_hash = rpc->call_hash;
101: rrpc.ret_errno = rpc_Errno;
102: rrpc.ret_retcode = ret;
103: rrpc.ret_argc = argc;
104:
105: memset(buf, 0, BUFSIZ);
106: memcpy(buf, &rrpc, (Limit = sizeof rrpc));
107: if (argc && vals) {
108: v = (rpc_val_t*) (buf + sizeof rrpc);
109: memcpy(v, vals, argc * sizeof(rpc_val_t));
110: Limit += argc * sizeof(rpc_val_t);
111: data = (u_char*) v + argc * sizeof(rpc_val_t);
112: for (ret = i = 0; i < argc; i++) {
113: switch (vals[i].val_type) {
114: case buffer:
115: if (ret || Limit + vals[i].val_len > BUFSIZ) {
116: rpc_SetErr(EMSGSIZE, "Error:: in prepare RPC packet (-7) ...\n");
117: rrpc.ret_retcode = ret = -7;
118: rrpc.ret_argc = 0;
119: break;
120: }
121:
122: memcpy(data, vals[i].val.buffer, vals[i].val_len);
123: data += vals[i].val_len;
124: Limit += vals[i].val_len;
125: break;
126: case string:
127: if (ret || Limit + vals[i].val_len + 1 > BUFSIZ) {
128: rpc_SetErr(EMSGSIZE, "Error:: in prepare RPC packet (-7) ...\n");
129: rrpc.ret_retcode = ret = -7;
130: rrpc.ret_argc = 0;
131: break;
132: }
133:
134: memcpy(data, vals[i].val.string, vals[i].val_len + 1);
135: data += vals[i].val_len + 1;
136: Limit += vals[i].val_len + 1;
137: break;
138: case array:
139: if (ret || Limit + vals[i].val_len > BUFSIZ) {
140: rpc_SetErr(EMSGSIZE, "Error:: in prepare RPC packet (-7) ...\n");
141: rrpc.ret_retcode = ret = -7;
142: rrpc.ret_argc = 0;
143: break;
144: }
145:
146: memcpy(data, vals[i].val.array, vals[i].val_len);
147: data += vals[i].val_len;
148: Limit += vals[i].val_len;
149: break;
150: default:
151: break;
152: }
153:
154: RPC_FREE_VAL(&vals[i]);
155: }
156: }
157:
158: if ((ret = send(c->cli_sock, buf, Limit, 0)) == -1) {
159: LOGERR;
160: ret = -8;
161: break;
162: }
163: if (ret != Limit) {
164: rpc_SetErr(EBADMSG, "Error:: in send RPC request, should be send %d bytes, "
165: "really is %d\n", Limit, ret);
166: ret = -9;
167: break;
168: }
169: } while (ret > -1);
170:
171: shutdown(c->cli_sock, SHUT_RDWR);
172: close(c->cli_sock);
173: memset(c, 0, sizeof(rpc_cli_t));
174: return (void*) ret;
175: }
176:
177: // -------------------------------------------------
178:
179: /*
180: * rpc_srv_initServer() Init & create RPC Server
181: * @regProgID = ProgramID for authentication & recognition
182: * @regProcID = ProcessID for authentication & recognition
183: * @concurentClients = Concurent clients at same time to this server
184: * @family = Family socket type, AF_INET or AF_INET6
185: * @csHost = Host name or IP address for bind server, if NULL any address
186: * @Port = Port for bind server, if Port == 0 default port is selected
187: * return: NULL == error or !=NULL bind and created RPC server instance
188: */
189: rpc_srv_t *
190: rpc_srv_initServer(u_int regProgID, u_int regProcID, int concurentClients,
191: u_short family, const char *csHost, u_short Port)
192: {
193: rpc_srv_t *srv = NULL;
194: int n = 1;
195: struct hostent *host = NULL;
196: struct sockaddr_in sin;
197: struct sockaddr_in6 sin6;
198:
199: if (!concurentClients || !regProgID || (family != AF_INET && family != AF_INET6)) {
200: rpc_SetErr(EINVAL, "Error:: Invalid parameters can`t init RPC server ...\n");
201: return NULL;
202: }
203: if (!Port)
204: Port = RPC_DEFPORT;
205: if (csHost) {
206: host = gethostbyname2(csHost, family);
207: if (!host) {
208: rpc_SetErr(h_errno, "Error:: %s\n", hstrerror(h_errno));
209: return NULL;
210: }
211: }
212: switch (family) {
213: case AF_INET:
214: memset(&sin, 0, sizeof sin);
215: sin.sin_len = sizeof sin;
216: sin.sin_family = family;
217: sin.sin_port = htons(Port);
218: if (csHost)
219: memcpy(&sin.sin_addr, host->h_addr, host->h_length);
220: break;
221: case AF_INET6:
222: memset(&sin6, 0, sizeof sin6);
223: sin6.sin6_len = sizeof sin6;
224: sin6.sin6_family = family;
225: sin6.sin6_port = htons(Port);
226: if (csHost)
227: memcpy(&sin6.sin6_addr, host->h_addr, host->h_length);
228: break;
229: default:
230: rpc_SetErr(EINVAL, "Error:: Invalid parameters can`t start RPC server ...\n");
231: return NULL;
232: }
233:
234: srv = malloc(sizeof(rpc_srv_t));
235: if (!srv) {
236: LOGERR;
237: return NULL;
238: } else
239: memset(srv, 0, sizeof(rpc_srv_t));
240:
241: srv->srv_numcli = concurentClients;
242: srv->srv_session.sess_version = RPC_VERSION;
243: srv->srv_session.sess_program = regProgID;
244: srv->srv_session.sess_process = regProcID;
245:
246: srv->srv_server.cli_parent = srv;
247: if (family == AF_INET)
248: memcpy(&srv->srv_server.cli_sa, &sin, sizeof srv->srv_server.cli_sa);
249: else
250: memcpy(&srv->srv_server.cli_sa, &sin6, sizeof srv->srv_server.cli_sa);
251: srv->srv_server.cli_sock = socket(family, SOCK_STREAM, 0);
252: if (srv->srv_server.cli_sock == -1) {
253: LOGERR;
254: free(srv);
255: return NULL;
256: }
257: if (setsockopt(srv->srv_server.cli_sock, SOL_SOCKET, SO_REUSEADDR, &n, sizeof n) == -1) {
258: LOGERR;
259: close(srv->srv_server.cli_sock);
260: free(srv);
261: return NULL;
262: }
263: if (bind(srv->srv_server.cli_sock, &srv->srv_server.cli_sa, sizeof srv->srv_server.cli_sa) == -1) {
264: LOGERR;
265: close(srv->srv_server.cli_sock);
266: free(srv);
267: return NULL;
268: }
269:
270: srv->srv_clients = calloc(srv->srv_numcli, sizeof(rpc_cli_t));
271: if (!srv->srv_clients) {
272: LOGERR;
273: close(srv->srv_server.cli_sock);
274: free(srv);
275: return NULL;
276: } else
277: memset(srv->srv_clients, 0, srv->srv_numcli * sizeof(rpc_cli_t));
278:
279: rpc_srv_registerCall(srv, NULL, CALL_SRVCLIENTS, 0);
280: rpc_srv_registerCall(srv, NULL, CALL_SRVCALLS, 0);
281: rpc_srv_registerCall(srv, NULL, CALL_SRVSESSIONS, 0);
282: return srv;
283: }
284:
285: /*
286: * rpc_srv_endServer() Destroy RPC server, close all opened sockets and free resources
287: * @srv = RPC Server instance
288: * return: none
289: */
290: void
291: rpc_srv_endServer(rpc_srv_t * __restrict srv)
292: {
293: rpc_cli_t *c;
294: register int i;
295: rpc_func_t *f;
296:
297: if (!srv) {
298: rpc_SetErr(EINVAL, "Error:: Can`t destroy server because parameter is null!\n");
299: return;
300: }
301:
302: while ((f = srv->srv_funcs)) {
303: srv->srv_funcs = f->func_next;
304: free(f);
305: }
306:
307: for (i = 0, c = srv->srv_clients; i < srv->srv_numcli && c; i++, c++)
308: if (c->cli_sa.sa_family)
309: shutdown(c->cli_sock, SHUT_RDWR);
310: close(srv->srv_server.cli_sock);
311:
312: if (srv->srv_clients) {
313: free(srv->srv_clients);
314: srv->srv_numcli = 0;
315: }
316:
317: free(srv);
318: srv = NULL;
319: }
320:
321: /*
322: * rpc_srv_execServer() Execute Main server loop and wait for clients requests
323: * @srv = RPC Server instance
324: * return: -1 error or 0 ok, infinite loop ...
325: */
326: int
327: rpc_srv_execServer(rpc_srv_t * __restrict srv)
328: {
329: socklen_t salen = sizeof(struct sockaddr);
330: register int i;
331: rpc_cli_t *c;
332:
333: if (!srv) {
334: rpc_SetErr(EINVAL, "Error:: Invalid parameter can`t start RPC server ...\n");
335: return -1;
336: }
337:
338: if (listen(srv->srv_server.cli_sock, SOMAXCONN) == -1) {
339: LOGERR;
340: return -1;
341: }
342:
343: while (42) {
344: for (c = srv->srv_clients, i = 0; i < srv->srv_numcli && c; i++, c++)
345: if (!c->cli_sa.sa_family)
346: break;
347: if (c && c->cli_sa.sa_family && c->cli_parent) {
348: usleep(1000000);
349: continue;
350: }
351: c->cli_sock = accept(srv->srv_server.cli_sock, &c->cli_sa, &salen);
352: if (c->cli_sock == -1) {
353: printf("%s(%d): #%d - %s\n", __func__, __LINE__, errno, strerror(errno));
354: LOGERR;
355: continue;
356: } else
357: c->cli_parent = srv;
358:
359: if (pthread_create(&c->cli_tid, NULL, rpc_srv_dispatchCall, c)) {
360: LOGERR;
361: continue;
362: }
363: }
364:
365: /* not reached !!! */
366: return 0;
367: }
368:
369: // ---------------------------------------------------------
370:
371: /*
372: * rpc_srv_freeValsCall() Free return variables for RPC call
373: * @call = RPC function call
374: * return: none
375: */
376: inline void
377: rpc_srv_freeValsCall(rpc_func_t * __restrict call)
378: {
379: rpc_srv_declValsCall(call, 0);
380: }
381:
382: /*
383: * rpc_srv_declValsCall() Declare return variables for RPC call
384: * @call = RPC function call
385: * @return_vals = Number of return variables
386: * return: -1 error, !=-1 ok
387: */
388: inline int
389: rpc_srv_declValsCall(rpc_func_t * __restrict call, int return_vals)
390: {
391: void *ptr;
392:
393: if (!call || return_vals < 0) {
394: rpc_SetErr(EINVAL, "Error:: Invalid parameter can`t declare return variables for RPC call...\n");
395: return -1;
396: } else
397: call->func_args = return_vals;
398:
399: if (!return_vals) {
400: if (call->func_vals) {
401: free(call->func_vals);
402: call->func_vals = NULL;
403: }
404: } else {
405: ptr = realloc(call->func_vals, return_vals * sizeof(rpc_val_t));
406: if (!ptr) {
407: LOGERR;
408: return -1;
409: } else
410: call->func_vals = ptr;
411: }
412:
413: return call->func_args;
414: }
415:
416: /*
417: * rpc_srv_delValsCall() Clean values from return variables of RPC call
418: * @call = RPC function call
419: * return: -1 error, !=-1 Returned number of cleaned RPC variables
420: */
421: inline int
422: rpc_srv_delValsCall(rpc_func_t * __restrict call)
423: {
424: if (!call) {
425: rpc_SetErr(EINVAL, "Error:: Invalid parameter can`t delete return variables ...\n");
426: return -1;
427: }
428:
429: memset(call->func_vals, 0, call->func_args * sizeof(rpc_val_t));
430: return call->func_args;
431: }
432:
433: /*
434: * rpc_srv_copyValsCall() Copy return variables for RPC call to new variable
435: * @call = RPC function call
436: * @newvals = New allocated variables array, must be free after use
437: * return: -1 error, !=-1 Returned number of copied RPC variables
438: */
439: inline int
440: rpc_srv_copyValsCall(rpc_func_t * __restrict call, rpc_val_t ** __restrict newvals)
441: {
442: if (!call || !newvals) {
443: rpc_SetErr(EINVAL, "Error:: Invalid parameter can`t copy return variables to new array\n");
444: return -1;
445: }
446:
447: *newvals = calloc(call->func_args, sizeof(rpc_val_t));
448: if (!*newvals) {
449: LOGERR;
450: return -1;
451: } else
452: memcpy(*newvals, call->func_vals, call->func_args * sizeof(rpc_val_t));
453:
454: return call->func_args;
455: }
456:
457: /*
458: * rpc_srv_getValsCall() Get return variables for RPC call
459: * @call = RPC function call
460: * @vals = Returned variables, may be NULL
461: * return: -1 error, !=-1 Number of returned variables
462: */
463: inline int
464: rpc_srv_getValsCall(rpc_func_t * __restrict call, rpc_val_t ** __restrict vals)
465: {
466: if (!call) {
467: rpc_SetErr(EINVAL, "Error:: Invalid parameter can`t get return variables ...\n");
468: return -1;
469: }
470:
471: if (vals)
472: *vals = call->func_vals;
473: return call->func_args;
474: }
475:
476: // ---------------------------------------------------------
477:
478: /*
479: * rpc_srv_registerCall() Register call to RPC server
480: * @srv = RPC Server instance
481: * @csModule = Module name, if NULL self binary
482: * @csFunc = Function name
483: * @args = Number of function arguments
484: * return: -1 error or 0 register ok
485: */
486: int
487: rpc_srv_registerCall(rpc_srv_t * __restrict srv, const char *csModule, const char *csFunc, u_char args)
488: {
489: rpc_func_t *func;
490: u_char str[MAXPATHLEN + UCHAR_MAX + 1];
491:
492: memset(str, 0, MAXPATHLEN + UCHAR_MAX + 1);
493: if (!srv || !csFunc) {
494: rpc_SetErr(EINVAL, "Error:: Invalid parameter can`t register function to RPC server ...\n");
495: return -1;
496: }
497: if (!(func = malloc(sizeof(rpc_func_t)))) {
498: LOGERR;
499: return -1;
500: } else {
501: memset(func, 0, sizeof(rpc_func_t));
502: strlcpy((char*) func->func_name, csFunc, UCHAR_MAX + 1);
503: }
504: if (csModule) {
505: strlcpy((char*) func->func_file, csModule, MAXPATHLEN);
506: strlcpy((char*) str, csModule, MAXPATHLEN + UCHAR_MAX + 1);
507: }
508: strlcat((char*) str, "__", MAXPATHLEN + UCHAR_MAX + 1);
509: strlcat((char*) str, csFunc, MAXPATHLEN + UCHAR_MAX + 1);
510:
511: func->func_tag = crcFletcher16((u_short*) str, (MAXPATHLEN + UCHAR_MAX + 1) / 2);
512: func->func_hash = hash_fnv((char*) str, MAXPATHLEN + UCHAR_MAX + 1);
513:
514: if (rpc_srv_declValsCall(func, args) == -1) {
515: free(func);
516: return -1;
517: }
518:
519: func->func_next = srv->srv_funcs;
520: srv->srv_funcs = func;
521: return 0;
522: }
523:
524: /*
525: * rpc_srv_unregisterCall() Unregister call from RPC server
526: * @srv = RPC Server instance
527: * @csModule = Module name, if NULL self binary
528: * @csFunc = Function name
529: * return: -1 error, 0 not found call, 1 unregister ok
530: */
531: int
532: rpc_srv_unregisterCall(rpc_srv_t * __restrict srv, const char *csModule, const char *csFunc)
533: {
534: rpc_func_t func, *f, *curr;
535: u_char str[MAXPATHLEN + UCHAR_MAX + 1];
536:
537: memset(&func, 0, sizeof(rpc_func_t));
538: memset(str, 0, MAXPATHLEN + UCHAR_MAX + 1);
539: if (!srv || !csFunc) {
540: rpc_SetErr(EINVAL, "Error:: Invalid parameter can`t unregister function from RPC server ...\n");
541: return -1;
542: } else
543: strlcpy((char*) func.func_name, csFunc, UCHAR_MAX + 1);
544: if (csModule) {
545: strlcpy((char*) func.func_file, csModule, MAXPATHLEN);
546: strlcpy((char*) str, csModule, MAXPATHLEN + UCHAR_MAX + 1);
547: }
548: strlcat((char*) str, "__", MAXPATHLEN + UCHAR_MAX + 1);
549: strlcat((char*) str, csFunc, MAXPATHLEN + UCHAR_MAX + 1);
550:
551: func.func_tag = crcFletcher16((u_short*) str, (MAXPATHLEN + UCHAR_MAX + 1) / 2);
552: func.func_hash = hash_fnv((char*) str, MAXPATHLEN + UCHAR_MAX + 1);
553:
554: f = rpc_srv_getCall(srv, func.func_tag, func.func_hash);
555: if (!f) // not found element for unregister
556: return 0;
557:
558: if (srv->srv_funcs == f) { // if is 1st element
559: srv->srv_funcs = srv->srv_funcs->func_next;
560:
561: if (f->func_args && f->func_vals)
562: free(f->func_vals);
563: free(f);
564: } else {
565: for (curr = srv->srv_funcs; curr->func_next != f; curr = curr->func_next);
566: curr->func_next = curr->func_next->func_next;
567:
568: if (f->func_args && f->func_vals)
569: free(f->func_vals);
570: free(f);
571: }
572:
573: return 1;
574: }
575:
576: /*
577: * rpc_srv_getCall() Get registered call from RPC server
578: * @srv = RPC Server instance
579: * @tag = tag for function
580: * @hash = hash for function
581: * return: NULL not found call, !=NULL return call
582: */
583: inline rpc_func_t *
584: rpc_srv_getCall(rpc_srv_t * __restrict srv, uint16_t tag, uint32_t hash)
585: {
586: rpc_func_t *f;
587:
588: if (!srv) {
589: rpc_SetErr(EINVAL, "Error:: Invalid parameter can`t get function from RPC server ...\n");
590: return NULL;
591: }
592:
593: for (f = srv->srv_funcs; f; f = f->func_next)
594: if (f->func_tag == tag && f->func_hash == hash)
595: break;
596:
597: return f;
598: }
599:
600: /*
601: * rpc_srv_getFunc() Get registered call from RPC server by Name
602: * @srv = RPC Server instance
603: * @csModule = Module name, if NULL self binary
604: * @csFunc = Function name
605: * return: NULL not found call, !=NULL return call
606: */
607: rpc_func_t *
608: rpc_srv_getFunc(rpc_srv_t * __restrict srv, const char *csModule, const char *csFunc)
609: {
610: rpc_func_t func;
611: u_char str[MAXPATHLEN + UCHAR_MAX + 1];
612:
613: memset(&func, 0, sizeof(rpc_func_t));
614: memset(str, 0, MAXPATHLEN + UCHAR_MAX + 1);
615: if (!srv || !csFunc) {
616: rpc_SetErr(EINVAL, "Error:: Invalid parameter can`t get function from RPC server ...\n");
617: return NULL;
618: } else
619: strlcpy((char*) func.func_name, csFunc, UCHAR_MAX + 1);
620: if (csModule) {
621: strlcpy((char*) func.func_file, csModule, MAXPATHLEN);
622: strlcpy((char*) str, csModule, MAXPATHLEN + UCHAR_MAX + 1);
623: }
624: strlcat((char*) str, "__", MAXPATHLEN + UCHAR_MAX + 1);
625: strlcat((char*) str, csFunc, MAXPATHLEN + UCHAR_MAX + 1);
626:
627: func.func_tag = crcFletcher16((u_short*) str, (MAXPATHLEN + UCHAR_MAX + 1) / 2);
628: func.func_hash = hash_fnv((char*) str, MAXPATHLEN + UCHAR_MAX + 1);
629:
630: return rpc_srv_getCall(srv, func.func_tag, func.func_hash);
631: }
632:
633: // ---------------------------------------------------------
634:
635: /*
636: * rpc_srv_execCall() Execute registered call from RPC server
637: * @data = RPC const data
638: * @call = Register RPC call
639: * @rpc = IN RPC call structure
640: * @args = IN RPC call array of rpc values
641: * return: -1 error, !=-1 ok
642: */
643: int
644: rpc_srv_execCall(void * const data, rpc_func_t * __restrict call,
645: struct tagRPCCall * __restrict rpc, rpc_val_t * __restrict args)
646: {
647: void *dl;
648: rpc_callback_t func;
649: int ret;
650:
651: if (!data || !call || !rpc) {
652: rpc_SetErr(EINVAL, "Error:: Invalid parameter can`t exec call from RPC server ...\n");
653: return -1;
654: }
655:
656: dl = dlopen((char*) (*call->func_file ? call->func_file : NULL), RTLD_NOW);
657: if (!dl) {
658: rpc_SetErr(ENOENT, "Error:: Can`t attach module %s!\n", dlerror());
659: return -1;
660: }
661:
662: func = dlsym(dl, (char*) call->func_name);
663: if (func)
664: ret = func(data, call, rpc->call_argc, args);
665: else {
666: rpc_SetErr(ENOEXEC, "Error:: Can`t find function %s!\n", dlerror());
667: ret = -1;
668: }
669:
670: dlclose(dl);
671: return ret;
672: }