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: srv.c,v 1.8.2.4 2012/05/11 09:11:01 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: static void *rxPacket(sched_task_t*);
50: static void *rxBLOB(sched_task_t*);
51:
52: static void *
53: txPacket(sched_task_t *task)
54: {
55: rpc_cli_t *c = TASK_ARG(task);
56: rpc_srv_t *s = c->cli_parent;
57: rpc_func_t *f = NULL;
58: u_char *buf = TASK_DATA(task);
59: struct tagRPCCall *rpc = (struct tagRPCCall*) buf;
60: int ret, wlen = sizeof(struct tagRPCCall);
61: array_t *arr = NULL;
62:
63: ioTRACE(RPC_TRACE_LEVEL);
64:
65: if (rpc->call_argc) {
66: f = rpc_srv_getCall(s, ntohs(rpc->call_tag), ntohl(rpc->call_hash));
67: if (!f) {
68: rpc->call_argc ^= rpc->call_argc;
69: rpc->call_rep.ret = RPC_ERROR(-1);
70: rpc->call_rep.eno = RPC_ERROR(rpc_Errno);
71: } else {
72: rpc->call_argc = htons(rpc_srv_getVars(f, &arr));
73: /* Go Encapsulate variables */
74: ret = io_vars2buffer(buf + wlen, TASK_DATLEN(task) - wlen, arr);
75: io_clrVars(f->func_vars);
76: if (ret == -1) {
77: rpc_SetErr(EBADRPC, "Prepare RPC packet failed");
78: rpc->call_argc ^= rpc->call_argc;
79: rpc->call_rep.ret = RPC_ERROR(-1);
80: rpc->call_rep.eno = RPC_ERROR(rpc_Errno);
81: } else
82: wlen += ret;
83: }
84: }
85:
86: rpc->call_len = htons(wlen);
87:
88: /* calculate CRC */
89: rpc->call_crc ^= rpc->call_crc;
90: rpc->call_crc = htons(crcFletcher16((u_short*) buf, wlen / 2));
91:
92: /* send reply */
93: ret = send(TASK_FD(task), buf, wlen, 0);
94: if (ret == -1)
95: LOGERR;
96: else if (ret != wlen)
97: rpc_SetErr(EPROCUNAVAIL, "RPC reply, should be send %d bytes, "
98: "really sended %d bytes", wlen, ret);
99: else
100: ioDEBUG(RPC_DEBUG_LEVEL, "Sended %d bytes", ret);
101:
102: return NULL;
103: }
104:
105: static void *
106: execCall(sched_task_t *task)
107: {
108: rpc_cli_t *c = TASK_ARG(task);
109: rpc_srv_t *s = c->cli_parent;
110: rpc_func_t *f = NULL;
111: array_t *arr = NULL;
112: u_char *buf = TASK_DATA(task) + TASK_VAL(task);
113: struct tagRPCCall *rpc = (struct tagRPCCall*) buf;
114: int argc = ntohs(rpc->call_argc);
115:
116: ioTRACE(RPC_TRACE_LEVEL);
117:
118: /* Go decapsulate variables ... */
119: if (argc) {
120: arr = io_buffer2vars(buf + sizeof(struct tagRPCCall),
121: TASK_DATLEN(task) - TASK_VAL(task) - sizeof(struct tagRPCCall),
122: argc, 1);
123: if (!arr) {
124: rpc_SetErr(ERPCMISMATCH, "#%d - %s", io_GetErrno(), io_GetError());
125: rpc->call_argc ^= rpc->call_argc;
126: rpc->call_rep.ret = RPC_ERROR(-1);
127: rpc->call_rep.eno = RPC_ERROR(rpc_Errno);
128: return NULL;
129: }
130: }
131:
132: if (!(f = rpc_srv_getCall(s, ntohs(rpc->call_tag), ntohl(rpc->call_hash)))) {
133: rpc_SetErr(EPROGUNAVAIL, "Function not found at RPC server");
134: rpc->call_argc ^= rpc->call_argc;
135: rpc->call_rep.ret = RPC_ERROR(-1);
136: rpc->call_rep.eno = RPC_ERROR(rpc_Errno);
137: } else {
138: ioDEBUG(RPC_DEBUG_LEVEL, "RPC function %s from module %s",
139: AIT_GET_STR(&f->func_name), AIT_GET_LIKE(&f->func_file, char*));
140:
141: /* if client doesn't want reply */
142: argc = rpc->call_req.flags & RPC_NOREPLY;
143: rpc->call_rep.ret = RPC_ERROR(rpc_srv_execCall(f, rpc, arr));
144: if (rpc->call_rep.ret == htonl(-1)) {
145: rpc->call_rep.eno = RPC_ERROR(errno);
146: rpc->call_argc ^= rpc->call_argc;
147: } else {
148: rpc->call_rep.eno ^= rpc->call_rep.eno;
149: if (argc) {
150: /* without reply */
151: io_clrVars(f->func_vars);
152: rpc->call_argc ^= rpc->call_argc;
153: } else
154: rpc->call_argc = htons(rpc_srv_getVars(f, NULL));
155: }
156: }
157:
158: if (arr)
159: io_arrayDestroy(&arr);
160: return NULL;
161: }
162:
163: static void *
164: rxPacket(sched_task_t *task)
165: {
166: rpc_cli_t *c = TASK_ARG(task);
167: rpc_srv_t *s = c->cli_parent;
168: u_char *buf = TASK_DATA(task);
169: int rlen, noreply;
170: u_short crc, off = 0;
171: struct tagRPCCall *rpc;
172: struct timespec ts;
173:
174: ioTRACE(RPC_TRACE_LEVEL);
175:
176: memset(buf, 0, TASK_DATLEN(task));
177: rlen = recv(TASK_FD(task), buf, TASK_DATLEN(task), 0);
178: if (rlen == -1) {
179: LOGERR;
180: s->srv_kill = s->srv_blob.state = kill;
181: return NULL;
182: } else if (!rlen) { /* receive EOF */
183: s->srv_kill = s->srv_blob.state = kill;
184: return NULL;
185: } else
186: ioDEBUG(RPC_DEBUG_LEVEL, "Readed %d bytes", rlen);
187:
188: do {
189: if (rlen < sizeof(struct tagRPCCall)) {
190: rpc_SetErr(ERPCMISMATCH, "Too short RPC packet");
191:
192: schedRead(TASK_ROOT(task), rxPacket, TASK_ARG(task), TASK_FD(task),
193: TASK_DATA(task), TASK_DATLEN(task));
194: return NULL;
195: } else
196: rpc = (struct tagRPCCall*) (buf + off);
197:
198: rlen -= ntohs(rpc->call_len);
199:
200: /* check integrity of packet */
201: crc = ntohs(rpc->call_crc);
202: rpc->call_crc ^= rpc->call_crc;
203: if (crc != crcFletcher16((u_short*) (buf + off), ntohs(rpc->call_len) / 2)) {
204: rpc_SetErr(ERPCMISMATCH, "Bad CRC RPC packet");
205:
206: off += ntohs(rpc->call_len);
207: if (rlen < 1)
208: break;
209: else
210: continue;
211: }
212:
213: noreply = rpc->call_req.flags & RPC_NOREPLY;
214:
215: /* check RPC packet session info */
216: if (rpc_chkPktSession(&rpc->call_session, &s->srv_session)) {
217: rpc_SetErr(ERPCMISMATCH, "Get invalid RPC session");
218: rpc->call_argc ^= rpc->call_argc;
219: rpc->call_rep.ret = RPC_ERROR(-1);
220: rpc->call_rep.eno = RPC_ERROR(errno);
221: } else {
222: /* change socket timeout from last packet */
223: ts.tv_sec = rpc->call_session.sess_timeout;
224: ts.tv_nsec = 0;
225: schedPolling(TASK_ROOT(task), &ts, NULL);
226:
227: /* execute RPC call */
228: schedEvent(TASK_ROOT(task), execCall, TASK_ARG(task), off,
229: TASK_DATA(task), TASK_DATLEN(task));
230: }
231:
232: /* send RPC reply */
233: if (!noreply)
234: schedWrite(TASK_ROOT(task), txPacket, TASK_ARG(task), TASK_FD(task),
235: buf + off, TASK_DATLEN(task) - off);
236:
237: off += ntohs(rpc->call_len);
238: } while (rlen > 0);
239:
240: /* lets get next packet */
241: schedRead(TASK_ROOT(task), rxPacket, TASK_ARG(task), TASK_FD(task),
242: TASK_DATA(task), TASK_DATLEN(task));
243: return NULL;
244: }
245:
246: static void *
247: rpc_srv_dispatchCall(void *arg)
248: {
249: rpc_cli_t *c = arg;
250: rpc_srv_t *s;
251: u_char *buf;
252: sched_root_task_t *root;
253: struct timespec ts = { DEF_RPC_TIMEOUT, 0 };
254:
255: ioTRACE(RPC_TRACE_LEVEL);
256:
257: if (!arg) {
258: rpc_SetErr(EINVAL, "Invalid parameter can`t procced RPC client");
259: return NULL;
260: } else
261: s = c->cli_parent;
262:
263: /* allocate net buffer */
264: buf = malloc(s->srv_netbuf);
265: if (!buf) {
266: LOGERR;
267: return NULL;
268: }
269:
270: root = schedBegin();
271: if (!root) {
272: rpc_SetErr(sched_GetErrno(), "%s", sched_GetError());
273: free(buf);
274: return NULL;
275: } else {
276: schedTermCondition(root, kill);
277: schedPolling(root, &ts, NULL);
278: }
279:
280: schedRead(root, rxPacket, c, c->cli_sock, buf, s->srv_netbuf);
281:
282: schedRun(root, (void*) &s->srv_kill);
283: schedEnd(&root);
284:
285: shutdown(c->cli_sock, SHUT_RDWR);
286: close(c->cli_sock);
287: memset(c, 0, sizeof(rpc_cli_t));
288: free(buf);
289: return NULL;
290: }
291:
292:
293: static void *
294: txBLOB(sched_task_t *task)
295: {
296: u_char *buf = TASK_DATA(task);
297: struct tagBLOBHdr *blob = (struct tagBLOBHdr *) buf;
298: int wlen = sizeof(struct tagBLOBHdr);
299:
300: ioTRACE(RPC_TRACE_LEVEL);
301:
302: /* calculate CRC */
303: blob->hdr_crc ^= blob->hdr_crc;
304: blob->hdr_crc = htons(crcFletcher16((u_short*) buf, wlen / 2));
305:
306: /* send reply */
307: wlen = send(TASK_FD(task), buf, wlen, 0);
308: if (wlen == -1)
309: LOGERR;
310: else if (wlen != sizeof(struct tagBLOBHdr))
311: rpc_SetErr(EPROCUNAVAIL, "RPC reply, should be send %d bytes, "
312: "really sended %d bytes", sizeof(struct tagBLOBHdr), wlen);
313: else
314: ioDEBUG(RPC_DEBUG_LEVEL, "Sended %d bytes", wlen);
315:
316: return NULL;
317: }
318:
319: static void *
320: rxBLOB(sched_task_t *task)
321: {
322: rpc_cli_t *c = TASK_ARG(task);
323: rpc_srv_t *s = c->cli_parent;
324: rpc_blob_t *b;
325: u_char *buf = TASK_DATA(task);
326: struct tagBLOBHdr *blob = (struct tagBLOBHdr *) buf;
327: int rlen;
328: u_short crc;
329: struct timespec ts;
330:
331: ioTRACE(RPC_TRACE_LEVEL);
332:
333: /* check for disable service at this moment? */
334: if (!s || s->srv_blob.state == disable) {
335: usleep(100000);
336: #ifdef HAVE_PTHREAD_YIELD
337: pthread_yield();
338: #endif
339: schedRead(TASK_ROOT(task), rxBLOB, TASK_ARG(task), TASK_FD(task),
340: TASK_DATA(task), TASK_DATLEN(task));
341: return NULL;
342: }
343:
344: memset(buf, 0, TASK_DATLEN(task));
345: rlen = recv(TASK_FD(task), buf, TASK_DATLEN(task), 0);
346: if (rlen == -1) {
347: LOGERR;
348: s->srv_blob.state = kill;
349: return NULL;
350: } else if (!rlen || s->srv_kill == kill) { /* receive EOF */
351: s->srv_blob.state = kill;
352: return NULL;
353: } else
354: ioDEBUG(RPC_DEBUG_LEVEL, "Readed %d bytes", rlen);
355:
356: if (rlen < sizeof(struct tagBLOBHdr)) {
357: rpc_SetErr(ERPCMISMATCH, "Too short BLOB packet");
358: schedRead(TASK_ROOT(task), rxBLOB, TASK_ARG(task), TASK_FD(task),
359: TASK_DATA(task), TASK_DATLEN(task));
360: return NULL;
361: }
362:
363: /* check integrity of packet */
364: crc = ntohs(blob->hdr_crc);
365: blob->hdr_crc ^= blob->hdr_crc;
366: if (crc != crcFletcher16((u_short*) buf, rlen / 2)) {
367: rpc_SetErr(ERPCMISMATCH, "Bad CRC BLOB packet");
368: schedRead(TASK_ROOT(task), rxBLOB, TASK_ARG(task), TASK_FD(task),
369: TASK_DATA(task), TASK_DATLEN(task));
370: return NULL;
371: }
372:
373: /* check RPC packet session info */
374: if ((crc = rpc_chkPktSession(&blob->hdr_session, &s->srv_session))) {
375: rpc_SetErr(ERPCMISMATCH, "Get invalid RPC session");
376: blob->hdr_cmd = error;
377: goto end;
378: } else {
379: /* change socket timeout from last packet */
380: ts.tv_sec = blob->hdr_session.sess_timeout;
381: ts.tv_nsec = 0;
382: schedPolling(TASK_ROOT(task), &ts, NULL);
383: }
384:
385: /* Go to proceed packet ... */
386: switch (blob->hdr_cmd) {
387: case get:
388: if (!(b = rpc_srv_getBLOB(s, ntohl(blob->hdr_var)))) {
389: rpc_SetErr(EINVAL, "Var=%x not found", ntohl(blob->hdr_var));
390: blob->hdr_cmd = no;
391: blob->hdr_ret = RPC_ERROR(-1);
392: break;
393: } else
394: blob->hdr_len = htonl(b->blob_len);
395:
396: if (rpc_srv_blobMap(s, b) != -1) {
397: /* deliver BLOB variable to client */
398: blob->hdr_ret = htonl(rpc_srv_sendBLOB(c, b));
399: rpc_srv_blobUnmap(b);
400: } else {
401: blob->hdr_cmd = error;
402: blob->hdr_ret = RPC_ERROR(-1);
403: }
404: break;
405: case set:
406: if ((b = rpc_srv_registerBLOB(s, ntohl(blob->hdr_len)))) {
407: /* set new BLOB variable for reply :) */
408: blob->hdr_var = htonl(b->blob_var);
409:
410: /* receive BLOB from client */
411: blob->hdr_ret = htonl(rpc_srv_recvBLOB(c, b));
412: rpc_srv_blobUnmap(b);
413: } else {
414: blob->hdr_cmd = error;
415: blob->hdr_ret = RPC_ERROR(-1);
416: }
417: break;
418: case unset:
419: if (rpc_srv_unregisterBLOB(s, blob->hdr_var) == -1) {
420: blob->hdr_cmd = error;
421: blob->hdr_ret = RPC_ERROR(-1);
422: }
423: break;
424: default:
425: rpc_SetErr(EPROCUNAVAIL, "Unsupported BLOB command %d", blob->hdr_cmd);
426: blob->hdr_cmd = error;
427: blob->hdr_ret = RPC_ERROR(-1);
428: }
429:
430: end:
431: schedWrite(TASK_ROOT(task), txBLOB, TASK_ARG(task), TASK_FD(task),
432: TASK_DATA(task), TASK_DATLEN(task));
433: schedRead(TASK_ROOT(task), rxBLOB, TASK_ARG(task), TASK_FD(task),
434: TASK_DATA(task), TASK_DATLEN(task));
435: return NULL;
436: }
437:
438: static void *
439: rpc_srv_dispatchVars(void *arg)
440: {
441: rpc_cli_t *c = arg;
442: rpc_srv_t *s;
443: sched_root_task_t *root;
444: u_char *buf;
445: struct timespec ts = { DEF_RPC_TIMEOUT, 0 };
446:
447: ioTRACE(RPC_TRACE_LEVEL);
448:
449: if (!arg) {
450: rpc_SetErr(EINVAL, "Invalid parameter can`t procced BLOB");
451: return NULL;
452: } else
453: s = c->cli_parent;
454:
455: /* allocate net buffer */
456: buf = malloc(sizeof(struct tagBLOBHdr));
457: if (!buf) {
458: LOGERR;
459: return NULL;
460: }
461:
462: root = schedBegin();
463: if (!root) {
464: rpc_SetErr(sched_GetErrno(), "%s", sched_GetError());
465: free(buf);
466: return NULL;
467: } else {
468: schedTermCondition(root, kill);
469: schedPolling(root, &ts, NULL);
470: }
471:
472: schedRead(root, rxBLOB, c, c->cli_sock, buf, sizeof(struct tagBLOBHdr));
473:
474: schedRun(root, (void*) &s->srv_blob.state);
475: schedEnd(&root);
476:
477: shutdown(c->cli_sock, SHUT_RDWR);
478: close(c->cli_sock);
479: memset(c, 0, sizeof(rpc_cli_t));
480: free(buf);
481: return NULL;
482: }
483:
484: // -------------------------------------------------
485:
486: /*
487: * rpc_srv_initBLOBServer() - Init & create BLOB Server
488: *
489: * @srv = RPC server instance
490: * @Port = Port for bind server, if Port == 0 default port is selected
491: * @diskDir = Disk place for BLOB file objects
492: * return: -1 == error or 0 bind and created BLOB server instance
493: */
494: int
495: rpc_srv_initBLOBServer(rpc_srv_t * __restrict srv, u_short Port, const char *diskDir)
496: {
497: int n = 1;
498: io_sockaddr_t sa;
499:
500: ioTRACE(RPC_TRACE_LEVEL);
501:
502: if (!srv) {
503: rpc_SetErr(EINVAL, "Invalid parameters can`t init BLOB server");
504: return -1;
505: }
506: if (srv->srv_blob.state) {
507: rpc_SetErr(EPERM, "Already started BLOB server!");
508: return 0;
509: }
510:
511: memset(&srv->srv_blob, 0, sizeof srv->srv_blob);
512: if (access(diskDir, R_OK | W_OK) == -1) {
513: LOGERR;
514: return -1;
515: } else
516: AIT_SET_STR(&srv->srv_blob.dir, diskDir);
517:
518: srv->srv_blob.server.cli_tid = pthread_self();
519: srv->srv_blob.server.cli_parent = srv;
520:
521: memcpy(&sa, &srv->srv_server.cli_sa, sizeof sa);
522: switch (sa.sa.sa_family) {
523: case AF_INET:
524: sa.sin.sin_port = htons(Port ? Port : ntohs(sa.sin.sin_port) + 1);
525: break;
526: case AF_INET6:
527: sa.sin6.sin6_port = htons(Port ? Port : ntohs(sa.sin6.sin6_port) + 1);
528: break;
529: case AF_LOCAL:
530: strlcat(sa.sun.sun_path, ".blob", sizeof sa.sun.sun_path);
531: break;
532: default:
533: AIT_FREE_VAL(&srv->srv_blob.dir);
534: return -1;
535: }
536: memcpy(&srv->srv_blob.server.cli_sa, &sa, sizeof sa);
537:
538: /* create BLOB server socket */
539: srv->srv_blob.server.cli_sock = socket(srv->srv_server.cli_sa.sa.sa_family, SOCK_STREAM, 0);
540: if (srv->srv_blob.server.cli_sock == -1) {
541: LOGERR;
542: AIT_FREE_VAL(&srv->srv_blob.dir);
543: return -1;
544: }
545: if (setsockopt(srv->srv_blob.server.cli_sock, SOL_SOCKET, SO_REUSEADDR, &n, sizeof n) == -1) {
546: LOGERR;
547: close(srv->srv_blob.server.cli_sock);
548: AIT_FREE_VAL(&srv->srv_blob.dir);
549: return -1;
550: }
551: n = srv->srv_netbuf;
552: if (setsockopt(srv->srv_blob.server.cli_sock, SOL_SOCKET, SO_SNDBUF, &n, sizeof n) == -1) {
553: LOGERR;
554: close(srv->srv_blob.server.cli_sock);
555: AIT_FREE_VAL(&srv->srv_blob.dir);
556: return -1;
557: }
558: if (setsockopt(srv->srv_blob.server.cli_sock, SOL_SOCKET, SO_RCVBUF, &n, sizeof n) == -1) {
559: LOGERR;
560: close(srv->srv_blob.server.cli_sock);
561: AIT_FREE_VAL(&srv->srv_blob.dir);
562: return -1;
563: }
564: if (bind(srv->srv_blob.server.cli_sock, &srv->srv_blob.server.cli_sa.sa,
565: srv->srv_blob.server.cli_sa.sa.sa_len) == -1) {
566: LOGERR;
567: close(srv->srv_blob.server.cli_sock);
568: AIT_FREE_VAL(&srv->srv_blob.dir);
569: return -1;
570: }
571:
572: /* allocate pool for concurent clients */
573: srv->srv_blob.clients = calloc(srv->srv_numcli, sizeof(rpc_cli_t));
574: if (!srv->srv_blob.clients) {
575: LOGERR;
576: close(srv->srv_blob.server.cli_sock);
577: AIT_FREE_VAL(&srv->srv_blob.dir);
578: return -1;
579: } else
580: memset(srv->srv_blob.clients, 0, srv->srv_numcli * sizeof(rpc_cli_t));
581:
582: rpc_srv_registerCall(srv, NULL, CALL_BLOBSHUTDOWN, 0);
583: rpc_srv_registerCall(srv, NULL, CALL_BLOBCLIENTS, 1);
584: rpc_srv_registerCall(srv, NULL, CALL_BLOBVARS, 1);
585: rpc_srv_registerCall(srv, NULL, CALL_BLOBSTATE, 0);
586:
587: srv->srv_blob.state = enable; /* enable BLOB */
588: return 0;
589: }
590:
591: /*
592: * rpc_srv_endBLOBServer() - Destroy BLOB server, close all opened sockets and free resources
593: *
594: * @srv = RPC Server instance
595: * return: none
596: */
597: void
598: rpc_srv_endBLOBServer(rpc_srv_t * __restrict srv)
599: {
600: rpc_cli_t *c;
601: register int i;
602: rpc_blob_t *f;
603:
604: ioTRACE(RPC_TRACE_LEVEL);
605:
606: if (!srv || srv->srv_blob.state == disable)
607: return;
608: else
609: srv->srv_blob.state = kill;
610:
611: rpc_srv_unregisterCall(srv, NULL, CALL_BLOBSHUTDOWN);
612: rpc_srv_unregisterCall(srv, NULL, CALL_BLOBCLIENTS);
613: rpc_srv_unregisterCall(srv, NULL, CALL_BLOBVARS);
614: rpc_srv_unregisterCall(srv, NULL, CALL_BLOBSTATE);
615:
616: /* close all clients connections & server socket */
617: for (i = 0, c = srv->srv_blob.clients; i < srv->srv_numcli && c; i++, c++)
618: if (c->cli_sa.sa.sa_family)
619: shutdown(c->cli_sock, SHUT_RDWR);
620: close(srv->srv_blob.server.cli_sock);
621:
622: if (srv->srv_blob.clients) {
623: free(srv->srv_blob.clients);
624: srv->srv_blob.clients = NULL;
625: }
626:
627: /* detach blobs */
628: while ((f = srv->srv_blob.blobs)) {
629: srv->srv_blob.blobs = f->blob_next;
630: rpc_srv_blobFree(srv, f);
631: free(f);
632: }
633:
634: AIT_FREE_VAL(&srv->srv_blob.dir);
635:
636: /* at final, save disable BLOB service state */
637: srv->srv_blob.state = disable;
638: }
639:
640: /*
641: * rpc_srv_loopBLOB() - Execute Main BLOB server loop and wait for clients requests
642: *
643: * @srv = RPC Server instance
644: * return: -1 error or 0 ok, infinite loop ...
645: */
646: int
647: rpc_srv_loopBLOB(rpc_srv_t * __restrict srv)
648: {
649: socklen_t salen = sizeof(io_sockaddr_t);
650: register int i;
651: rpc_cli_t *c;
652: int ret;
653: pthread_attr_t attr;
654: struct pollfd pfd;
655:
656: ioTRACE(RPC_TRACE_LEVEL);
657:
658: if (!srv || srv->srv_blob.state == kill) {
659: rpc_SetErr(EINVAL, "Invalid parameter can`t start BLOB server");
660: return -1;
661: }
662:
663: if (listen(srv->srv_blob.server.cli_sock, SOMAXCONN) == -1) {
664: LOGERR;
665: return -1;
666: } else
667: fcntl(srv->srv_blob.server.cli_sock, F_SETFL,
668: fcntl(srv->srv_blob.server.cli_sock, F_GETFL) | O_NONBLOCK);
669:
670: pthread_attr_init(&attr);
671: pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
672:
673: pfd.fd = srv->srv_blob.server.cli_sock;
674: pfd.events = POLLIN | POLLPRI;
675: /* main BLOB loop */
676: while (srv->srv_blob.state != kill && srv->srv_kill != kill) {
677: for (c = srv->srv_blob.clients, i = 0; i < srv->srv_numcli && c; i++, c++)
678: if (!c->cli_sa.sa.sa_family)
679: break;
680: if (i >= srv->srv_numcli) {
681: #ifdef HAVE_PTHREAD_YIELD
682: pthread_yield();
683: #else
684: usleep(1000000);
685: #endif
686: continue;
687: }
688:
689: if ((ret = poll(&pfd, 1, srv->srv_session.sess_timeout * 1000)) == -1 ||
690: pfd.revents & (POLLERR | POLLHUP | POLLNVAL)) {
691: LOGERR;
692: ret = 1;
693: break;
694: } else if (!ret)
695: continue;
696:
697: c->cli_sock = accept(srv->srv_blob.server.cli_sock, &c->cli_sa.sa, &salen);
698: if (c->cli_sock == -1) {
699: LOGERR;
700: continue;
701: } else
702: c->cli_parent = srv;
703:
704: /* spawn dispatch thread for BLOB client */
705: if (pthread_create(&c->cli_tid, &attr, rpc_srv_dispatchVars, c)) {
706: LOGERR;
707: continue;
708: }
709: }
710:
711: srv->srv_blob.state = kill;
712:
713: pthread_attr_destroy(&attr);
714: return 0;
715: }
716:
717:
718: /*
719: * rpc_srv_initServer() - Init & create RPC Server
720: *
721: * @regProgID = ProgramID for authentication & recognition
722: * @regProcID = ProcessID for authentication & recognition
723: * @concurentClients = Concurent clients at same time to this server
724: * @netBuf = Network buffer length, if =0 == BUFSIZ (also meaning max RPC packet)
725: * @family = Family type, AF_INET, AF_INET6 or AF_LOCAL
726: * @csHost = Host name or address for bind server, if NULL any address
727: * @Port = Port for bind server, if Port == 0 default port is selected
728: * return: NULL == error or !=NULL bind and created RPC server instance
729: */
730: rpc_srv_t *
731: rpc_srv_initServer(u_int regProgID, u_int regProcID, int concurentClients,
732: int netBuf, u_short family, const char *csHost, u_short Port)
733: {
734: rpc_srv_t *srv = NULL;
735: int n = 1;
736: struct hostent *host = NULL;
737: io_sockaddr_t sa;
738:
739: ioTRACE(RPC_TRACE_LEVEL);
740:
741: if (!concurentClients || !regProgID ||
742: (family != AF_INET && family != AF_INET6 && family != AF_LOCAL)) {
743: rpc_SetErr(EINVAL, "Error:: Invalid parameters can`t init RPC server ...\n");
744: return NULL;
745: }
746: if (!Port)
747: Port = RPC_DEFPORT;
748: if (!netBuf)
749: netBuf = BUFSIZ;
750: else
751: netBuf = io_align(netBuf, 1); /* align netBuf length */
752: if (csHost && family != AF_LOCAL) {
753: host = gethostbyname2(csHost, family);
754: if (!host) {
755: rpc_SetErr(h_errno, "Error:: %s\n", hstrerror(h_errno));
756: return NULL;
757: }
758: }
759: memset(&sa, 0, sizeof sa);
760: sa.sa.sa_family = family;
761: switch (family) {
762: case AF_INET:
763: sa.sin.sin_len = sizeof(struct sockaddr_in);
764: sa.sin.sin_port = htons(Port);
765: if (csHost)
766: memcpy(&sa.sin.sin_addr, host->h_addr, host->h_length);
767: break;
768: case AF_INET6:
769: sa.sin6.sin6_len = sizeof(struct sockaddr_in6);
770: sa.sin6.sin6_port = htons(Port);
771: if (csHost)
772: memcpy(&sa.sin6.sin6_addr, host->h_addr, host->h_length);
773: break;
774: case AF_LOCAL:
775: sa.sun.sun_len = sizeof(struct sockaddr_un);
776: if (csHost)
777: strlcpy(sa.sun.sun_path, csHost, sizeof sa.sun.sun_path);
778: unlink(sa.sun.sun_path);
779: break;
780: default:
781: rpc_SetErr(EINVAL, "Error:: Invalid parameters can`t start RPC server ...\n");
782: return NULL;
783: }
784:
785: srv = malloc(sizeof(rpc_srv_t));
786: if (!srv) {
787: LOGERR;
788: return NULL;
789: } else
790: memset(srv, 0, sizeof(rpc_srv_t));
791:
792: srv->srv_netbuf = netBuf;
793: srv->srv_numcli = concurentClients;
794: srv->srv_session.sess_version = RPC_VERSION;
795: srv->srv_session.sess_timeout = DEF_RPC_TIMEOUT;
796: srv->srv_session.sess_program = regProgID;
797: srv->srv_session.sess_process = regProcID;
798:
799: srv->srv_server.cli_tid = pthread_self();
800: srv->srv_server.cli_parent = srv;
801: memcpy(&srv->srv_server.cli_sa, &sa, sizeof sa);
802:
803: /* create server socket */
804: srv->srv_server.cli_sock = socket(family, SOCK_STREAM, 0);
805: if (srv->srv_server.cli_sock == -1) {
806: LOGERR;
807: free(srv);
808: return NULL;
809: }
810: if (setsockopt(srv->srv_server.cli_sock, SOL_SOCKET, SO_REUSEADDR, &n, sizeof n) == -1) {
811: LOGERR;
812: close(srv->srv_server.cli_sock);
813: free(srv);
814: return NULL;
815: }
816: n = srv->srv_netbuf;
817: if (setsockopt(srv->srv_server.cli_sock, SOL_SOCKET, SO_SNDBUF, &n, sizeof n) == -1) {
818: LOGERR;
819: close(srv->srv_server.cli_sock);
820: free(srv);
821: return NULL;
822: }
823: if (setsockopt(srv->srv_server.cli_sock, SOL_SOCKET, SO_RCVBUF, &n, sizeof n) == -1) {
824: LOGERR;
825: close(srv->srv_server.cli_sock);
826: free(srv);
827: return NULL;
828: }
829: if (bind(srv->srv_server.cli_sock, &srv->srv_server.cli_sa.sa,
830: srv->srv_server.cli_sa.sa.sa_len) == -1) {
831: LOGERR;
832: close(srv->srv_server.cli_sock);
833: free(srv);
834: return NULL;
835: }
836:
837: /* allocate pool for concurent clients */
838: srv->srv_clients = calloc(srv->srv_numcli, sizeof(rpc_cli_t));
839: if (!srv->srv_clients) {
840: LOGERR;
841: close(srv->srv_server.cli_sock);
842: free(srv);
843: return NULL;
844: } else
845: memset(srv->srv_clients, 0, srv->srv_numcli * sizeof(rpc_cli_t));
846:
847: rpc_srv_registerCall(srv, NULL, CALL_SRVSHUTDOWN, 0);
848: rpc_srv_registerCall(srv, NULL, CALL_SRVCLIENTS, 1);
849: rpc_srv_registerCall(srv, NULL, CALL_SRVSESSIONS, 4);
850: rpc_srv_registerCall(srv, NULL, CALL_SRVCALLS, 1);
851:
852: return srv;
853: }
854:
855: /*
856: * rpc_srv_endServer() - Destroy RPC server, close all opened sockets and free resources
857: *
858: * @psrv = RPC Server instance
859: * return: none
860: */
861: void
862: rpc_srv_endServer(rpc_srv_t ** __restrict psrv)
863: {
864: rpc_cli_t *c;
865: register int i;
866: rpc_func_t *f;
867:
868: ioTRACE(RPC_TRACE_LEVEL);
869:
870: if (!psrv || !*psrv) {
871: rpc_SetErr(EINVAL, "Error:: Can`t destroy server because parameter is null!\n");
872: return;
873: }
874:
875: rpc_srv_endBLOBServer(*psrv);
876:
877: /* close all clients connections & server socket */
878: for (i = 0, c = (*psrv)->srv_clients; i < (*psrv)->srv_numcli && c; i++, c++)
879: if (c->cli_sa.sa.sa_family) {
880: shutdown(c->cli_sock, SHUT_RDWR);
881: close(c->cli_sock);
882: }
883: close((*psrv)->srv_server.cli_sock);
884:
885: if ((*psrv)->srv_clients) {
886: free((*psrv)->srv_clients);
887: (*psrv)->srv_clients = NULL;
888: (*psrv)->srv_numcli = 0;
889: }
890:
891: /* detach exported calls */
892: while ((f = (*psrv)->srv_funcs)) {
893: (*psrv)->srv_funcs = f->func_next;
894: io_freeVars(&f->func_vars);
895: AIT_FREE_VAL(&f->func_name);
896: AIT_FREE_VAL(&f->func_file);
897: free(f);
898: }
899:
900: free(*psrv);
901: *psrv = NULL;
902: }
903:
904: /*
905: * rpc_srv_loopServer() - Execute Main server loop and wait for clients requests
906: *
907: * @srv = RPC Server instance
908: * return: -1 error or 0 ok, infinite loop ...
909: */
910: int
911: rpc_srv_loopServer(rpc_srv_t * __restrict srv)
912: {
913: socklen_t salen = sizeof(io_sockaddr_t);
914: register int i;
915: rpc_cli_t *c;
916: int ret;
917: pthread_attr_t attr;
918: struct pollfd pfd;
919:
920: ioTRACE(RPC_TRACE_LEVEL);
921:
922: if (!srv) {
923: rpc_SetErr(EINVAL, "Error:: Invalid parameter can`t start RPC server ...\n");
924: return -1;
925: }
926:
927: /* activate BLOB server worker if srv->srv_blob.state == enable */
928: rpc_srv_execBLOBServer(srv);
929:
930: if (listen(srv->srv_server.cli_sock, SOMAXCONN) == -1) {
931: LOGERR;
932: return -1;
933: } else
934: fcntl(srv->srv_server.cli_sock, F_SETFL, fcntl(srv->srv_server.cli_sock, F_GETFL) | O_NONBLOCK);
935:
936: pthread_attr_init(&attr);
937: pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
938:
939: pfd.fd = srv->srv_server.cli_sock;
940: pfd.events = POLLIN | POLLPRI;
941: /* main rpc loop */
942: while (srv->srv_kill != kill) {
943: for (c = srv->srv_clients, i = 0; i < srv->srv_numcli && c; i++, c++)
944: if (!c->cli_sa.sa.sa_family)
945: break;
946: if (i >= srv->srv_numcli) {
947: #ifdef HAVE_PTHREAD_YIELD
948: pthread_yield();
949: #else
950: usleep(1000000);
951: #endif
952: continue;
953: }
954:
955: if ((ret = poll(&pfd, 1, srv->srv_session.sess_timeout * 1000)) == -1 ||
956: pfd.revents & (POLLERR | POLLHUP | POLLNVAL)) {
957: LOGERR;
958: ret = 1;
959: break;
960: } else if (!ret)
961: continue;
962:
963: c->cli_sock = accept(srv->srv_server.cli_sock, &c->cli_sa.sa, &salen);
964: if (c->cli_sock == -1) {
965: LOGERR;
966: continue;
967: } else
968: c->cli_parent = srv;
969:
970: /* spawn rpc client dispatcher */
971: if (pthread_create(&c->cli_tid, &attr, rpc_srv_dispatchCall, c)) {
972: LOGERR;
973: continue;
974: }
975: }
976:
977: pthread_attr_destroy(&attr);
978: return 0;
979: }
980:
981: // ---------------------------------------------------------
982:
983: /*
984: * rpc_srv_execCall() Execute registered call from RPC server
985: *
986: * @call = Register RPC call
987: * @rpc = IN RPC call structure
988: * @args = IN RPC calling arguments from RPC client
989: * return: -1 error, !=-1 ok
990: */
991: int
992: rpc_srv_execCall(rpc_func_t * __restrict call, struct tagRPCCall * __restrict rpc,
993: array_t * __restrict args)
994: {
995: void *dl;
996: rpc_callback_t func;
997: int ret;
998:
999: ioTRACE(RPC_TRACE_LEVEL);
1000:
1001: if (!call || !rpc || !call->func_parent) {
1002: rpc_SetErr(EINVAL, "Invalid parameter can`t exec function");
1003: return -1;
1004: }
1005:
1006: dl = dlopen(AIT_ADDR(&call->func_file), RTLD_NOW);
1007: if (!dl) {
1008: rpc_SetErr(ENOENT, "Can`t attach module %s!", dlerror());
1009: return -1;
1010: }
1011:
1012: func = dlsym(dl, (const char*) AIT_GET_STR(&call->func_name));
1013: if (func)
1014: ret = func(call, ntohs(rpc->call_argc), args);
1015: else {
1016: rpc_SetErr(ENOEXEC, "Can`t find function %s!", dlerror());
1017: ret = -1;
1018: }
1019:
1020: dlclose(dl);
1021: return ret;
1022: }
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