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 1.12.2.9 2012/11/19 15:54:47 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: /* SOCK_STREAM */
50: static void *acceptClients(sched_task_t *);
51: static void *closeClient(sched_task_t *);
52: static void *rxPacket(sched_task_t *);
53: static void *txPacket(sched_task_t *);
54:
55: /* SOCK_DGRAM */
56: static void *freeClient(sched_task_t *);
57: static void *rxUDPPacket(sched_task_t *);
58: static void *txUDPPacket(sched_task_t *);
59:
60: /* SOCK_RAW */
61:
62: static sched_task_func_t cbProto[SOCK_RAW + 1][4] = {
63: { acceptClients, closeClient, rxPacket, txPacket }, /* SOCK_STREAM */
64: { acceptClients, closeClient, rxPacket, txPacket }, /* SOCK_STREAM */
65: { rxUDPPacket, freeClient, rxUDPPacket, txUDPPacket }, /* SOCK_DGRAM */
66: { NULL, NULL, NULL, NULL } /* SOCK_RAW */
67: };
68:
69:
70: inline void
71: rpc_freeCli(rpc_cli_t * __restrict c)
72: {
73: rpc_srv_t *s = c->cli_parent;
74: ait_val_t v;
75:
76: printf("_t_1=%p t_e=%p so=%d c=%p %s:%hu\n", s->srv_root->root_timer.tqh_first, *s->srv_root->root_timer.tqh_last, c->cli_sock, c, io_n2addr(&c->cli_sa, &v), io_n2port(&c->cli_sa));
77: AIT_FREE_VAL(&v);
78: schedCancelby(s->srv_root, taskMAX, CRITERIA_ARG, c, NULL);
79: printf("+t_1=%p t_e=%p so=%d c=%p\n", s->srv_root->root_timer.tqh_first, *s->srv_root->root_timer.tqh_last, c->cli_sock, c);
80:
81: /* free buffer */
82: AIT_FREE_VAL(&c->cli_buf);
83:
84: io_arrayDel(s->srv_clients, c->cli_id, 0);
85: if (c)
86: io_free(c);
87: }
88:
89:
90: static inline int
91: _check4freeslot(rpc_srv_t * __restrict srv, io_sockaddr_t * __restrict sa)
92: {
93: rpc_cli_t *c = NULL;
94: register int i;
95:
96: /* check free slots for connect */
97: for (i = 0; i < io_arraySize(srv->srv_clients) &&
98: (c = io_array(srv->srv_clients, i, rpc_cli_t*)); i++)
99: /* check for duplicates */
100: if (sa && !io_addrcmp(&c->cli_sa, sa, 42))
101: break;
102: if (i >= io_arraySize(srv->srv_clients))
103: return -1; /* no more free slots! */
104:
105: return i;
106: }
107:
108: static rpc_cli_t *
109: _allocClient(rpc_srv_t * __restrict srv, io_sockaddr_t * __restrict sa)
110: {
111: rpc_cli_t *c = NULL;
112: int n;
113:
114: n = _check4freeslot(srv, sa);
115: if (n == -1)
116: return NULL;
117: else
118: c = io_array(srv->srv_clients, n, rpc_cli_t*);
119:
120: if (!c) {
121: c = io_malloc(sizeof(rpc_cli_t));
122: if (!c) {
123: LOGERR;
124: srv->srv_kill = 1;
125: return NULL;
126: } else {
127: memset(c, 0, sizeof(rpc_cli_t));
128: io_arraySet(srv->srv_clients, n, c);
129: c->cli_id = n;
130: c->cli_parent = srv;
131: }
132:
133: /* alloc empty buffer */
134: AIT_SET_BUF2(&c->cli_buf, 0, srv->srv_netbuf);
135: }
136:
137: return c;
138: }
139:
140:
141: static void *
142: freeClient(sched_task_t *task)
143: {
144: rpc_freeCli(TASK_ARG(task));
145:
146: return NULL;
147: }
148:
149: static void *
150: closeClient(sched_task_t *task)
151: {
152: int sock = ((rpc_cli_t*) TASK_ARG(task))->cli_sock;
153:
154: rpc_freeCli(TASK_ARG(task));
155:
156: /* close client socket */
157: shutdown(sock, SHUT_RDWR);
158: close(sock);
159: return NULL;
160: }
161:
162: static void *
163: txPacket(sched_task_t *task)
164: {
165: rpc_cli_t *c = TASK_ARG(task);
166: rpc_srv_t *s = c->cli_parent;
167: rpc_func_t *f = NULL;
168: u_char buf[USHRT_MAX] = { 0 };
169: struct tagRPCCall *rpc = (struct tagRPCCall*) buf;
170: int ret, wlen = sizeof(struct tagRPCCall);
171:
172: /* copy RPC header */
173: memcpy(buf, TASK_DATA(task), wlen);
174:
175: if (rpc->call_argc) {
176: f = rpc_srv_getCall(s, ntohs(rpc->call_tag));
177: if (!f) {
178: rpc_SetErr(EPROGUNAVAIL, "Function not found at RPC server");
179: rpc->call_argc ^= rpc->call_argc;
180: rpc->call_rep.ret = RPC_ERROR(-1);
181: rpc->call_rep.eno = RPC_ERROR(rpc_Errno);
182: } else {
183: rpc->call_argc = htons(io_arraySize(RPC_RETVARS(c)));
184: /* Go Encapsulate variables */
185: ret = io_vars2buffer(buf + wlen, sizeof buf - wlen, RPC_RETVARS(c));
186: /* Free return values */
187: io_freeVars(&c->cli_vars);
188: if (ret == -1) {
189: rpc_SetErr(EBADRPC, "Prepare RPC packet failed");
190: rpc->call_argc ^= rpc->call_argc;
191: rpc->call_rep.ret = RPC_ERROR(-1);
192: rpc->call_rep.eno = RPC_ERROR(rpc_Errno);
193: } else
194: wlen += ret;
195: }
196: }
197:
198: rpc->call_len = htons(wlen);
199:
200: /* calculate CRC */
201: rpc->call_crc ^= rpc->call_crc;
202: rpc->call_crc = htons(crcFletcher16((u_short*) buf, wlen / 2));
203:
204: /* send reply */
205: ret = send(TASK_FD(task), buf, wlen, MSG_NOSIGNAL);
206: if (ret == -1 || ret != wlen) {
207: /* close connection */
208: schedEvent(TASK_ROOT(task), cbProto[s->srv_proto][CB_CLOSECLIENT],
209: TASK_ARG(task), 0, NULL, 0);
210: }
211:
212: return NULL;
213: }
214:
215: static void *
216: execCall(sched_task_t *task)
217: {
218: rpc_cli_t *c = TASK_ARG(task);
219: rpc_srv_t *s = c->cli_parent;
220: rpc_func_t *f = NULL;
221: array_t *arr = NULL;
222: u_char *buf = AIT_GET_BUF(&c->cli_buf) + TASK_VAL(task);
223: struct tagRPCCall *rpc = (struct tagRPCCall*) buf;
224: int argc = ntohs(rpc->call_argc);
225:
226: /* Go decapsulate variables ... */
227: if (argc) {
228: arr = io_buffer2vars(buf + sizeof(struct tagRPCCall),
229: AIT_LEN(&c->cli_buf) - TASK_VAL(task) - sizeof(struct tagRPCCall),
230: argc, 42);
231: if (!arr) {
232: rpc_SetErr(ERPCMISMATCH, "#%d - %s", io_GetErrno(), io_GetError());
233: rpc->call_argc ^= rpc->call_argc;
234: rpc->call_rep.ret = RPC_ERROR(-1);
235: rpc->call_rep.eno = RPC_ERROR(rpc_Errno);
236: return NULL;
237: }
238: } else
239: arr = NULL;
240:
241: if (!(f = rpc_srv_getCall(s, ntohs(rpc->call_tag)))) {
242: rpc_SetErr(EPROGUNAVAIL, "Function not found at RPC server");
243: rpc->call_argc ^= rpc->call_argc;
244: rpc->call_rep.ret = RPC_ERROR(-1);
245: rpc->call_rep.eno = RPC_ERROR(rpc_Errno);
246: } else {
247: /* if client doesn't want reply */
248: argc = RPC_CHK_NOREPLY(rpc);
249: rpc->call_rep.ret = RPC_ERROR(rpc_srv_execCall(c, rpc, f->func_name, arr));
250: if (rpc->call_rep.ret == htonl(-1)) {
251: rpc->call_rep.eno = RPC_ERROR(errno);
252: rpc->call_argc ^= rpc->call_argc;
253: } else {
254: rpc->call_rep.eno ^= rpc->call_rep.eno;
255: if (argc) {
256: /* without reply */
257: io_freeVars(&c->cli_vars);
258: rpc->call_argc ^= rpc->call_argc;
259: } else {
260: /* reply */
261: rpc->call_argc = htons(io_arraySize(RPC_RETVARS(c)));
262: }
263: }
264: }
265:
266: io_arrayDestroy(&arr);
267: return NULL;
268: }
269:
270: static void *
271: rxPacket(sched_task_t *task)
272: {
273: rpc_cli_t *c = TASK_ARG(task);
274: rpc_srv_t *s = c->cli_parent;
275: int len, rlen, noreply;
276: u_short crc, off = TASK_DATLEN(task);
277: u_char *buf = AIT_GET_BUF(&c->cli_buf);
278: struct tagRPCCall *rpc;
279:
280: if (!off)
281: memset(buf, 0, AIT_LEN(&c->cli_buf));
282: rlen = recv(TASK_FD(task), buf + off, AIT_LEN(&c->cli_buf) - off, 0);
283: if (rlen < 1) {
284: /* close connection */
285: schedEvent(TASK_ROOT(task), cbProto[s->srv_proto][CB_CLOSECLIENT],
286: TASK_ARG(task), 0, NULL, 0);
287: return NULL;
288: } else {
289: rlen += off; /* add reminded bytes from previous rxPacket, if exists! */
290: off = 0; /* process buffer from start offset == 0 */
291: }
292:
293: do {
294: /* check RPC packet */
295: if (rlen < sizeof(struct tagRPCCall)) {
296: rpc_SetErr(ERPCMISMATCH, "Short RPC packet");
297:
298: /* reminder received previous bytes ;) */
299: schedRead(TASK_ROOT(task), TASK_FUNC(task), TASK_ARG(task),
300: TASK_FD(task), TASK_DATA(task), rlen);
301: return NULL;
302: } else
303: rpc = (struct tagRPCCall*) (buf + off);
304:
305: len = ntohs(rpc->call_len);
306: rlen -= len;
307:
308: /* check RPC packet lengths */
309: if (rlen < 0 || len < sizeof(struct tagRPCCall)) {
310: rpc_SetErr(ERPCMISMATCH, "Broken RPC packet length");
311: /* skip entire packet */
312: break;
313: }
314:
315: /* check integrity of packet */
316: crc = ntohs(rpc->call_crc);
317: rpc->call_crc ^= rpc->call_crc;
318: if (crc != crcFletcher16((u_short*) rpc, len / 2)) {
319: rpc_SetErr(ERPCMISMATCH, "Bad CRC RPC packet");
320:
321: off += len;
322: /* try next packet remaining into buffer */
323: continue;
324: }
325:
326: noreply = RPC_CHK_NOREPLY(rpc);
327:
328: /* check RPC packet session info */
329: if (rpc_chkPktSession(&rpc->call_session, &s->srv_session)) {
330: rpc_SetErr(ERPCMISMATCH, "Get invalid RPC session");
331: rpc->call_argc ^= rpc->call_argc;
332: rpc->call_rep.ret = RPC_ERROR(-1);
333: rpc->call_rep.eno = RPC_ERROR(errno);
334: } else {
335: /* execute RPC call */
336: schedEvent(TASK_ROOT(task), execCall, TASK_ARG(task), off, NULL, 0);
337: }
338:
339: /* send RPC reply */
340: if (!noreply)
341: schedWrite(TASK_ROOT(task), cbProto[s->srv_proto][CB_TXPACKET],
342: TASK_ARG(task), TASK_FD(task), rpc, len);
343:
344: off += len;
345: } while (rlen > 0);
346:
347: /* lets get next packet */
348: schedRead(TASK_ROOT(task), TASK_FUNC(task), TASK_ARG(task), TASK_FD(task), TASK_DATA(task), 0);
349: return NULL;
350: }
351:
352: static void *
353: acceptClients(sched_task_t *task)
354: {
355: rpc_srv_t *srv = TASK_ARG(task);
356: rpc_cli_t *c = NULL;
357: socklen_t salen = sizeof(io_sockaddr_t);
358:
359: c = _allocClient(srv, NULL);
360: if (!c)
361: goto end;
362:
363: /* accept client */
364: c->cli_sock = accept(TASK_FD(task), &c->cli_sa.sa, &salen);
365: if (c->cli_sock == -1) {
366: LOGERR;
367: AIT_FREE_VAL(&c->cli_buf);
368: io_arrayDel(srv->srv_clients, c->cli_id, 42);
369: goto end;
370: } else
371: fcntl(c->cli_sock, F_SETFL, fcntl(c->cli_sock, F_GETFL) | O_NONBLOCK);
372:
373: schedRead(TASK_ROOT(task), cbProto[srv->srv_proto][CB_RXPACKET], c,
374: c->cli_sock, NULL, 0);
375: end:
376: schedReadSelf(task);
377: return NULL;
378: }
379:
380:
381: static void *
382: txUDPPacket(sched_task_t *task)
383: {
384: rpc_cli_t *c = TASK_ARG(task);
385: rpc_srv_t *s = c->cli_parent;
386: rpc_func_t *f = NULL;
387: u_char buf[USHRT_MAX] = { 0 };
388: struct tagRPCCall *rpc = (struct tagRPCCall*) buf;
389: int ret, wlen = sizeof(struct tagRPCCall);
390: struct timespec ts = { DEF_RPC_TIMEOUT, 0 };
391:
392: schedCancelby(TASK_ROOT(task), taskTIMER, CRITERIA_DATA, TASK_ARG(task), NULL);
393: schedTimer(TASK_ROOT(task), cbProto[s->srv_proto][CB_CLOSECLIENT],
394: TASK_ARG(task), ts, TASK_ARG(task), 0);
395:
396: /* copy RPC header */
397: memcpy(buf, TASK_DATA(task), wlen);
398:
399: if (rpc->call_argc) {
400: f = rpc_srv_getCall(s, ntohs(rpc->call_tag));
401: if (!f) {
402: rpc_SetErr(EPROGUNAVAIL, "Function not found at RPC server");
403: rpc->call_argc ^= rpc->call_argc;
404: rpc->call_rep.ret = RPC_ERROR(-1);
405: rpc->call_rep.eno = RPC_ERROR(rpc_Errno);
406: } else {
407: rpc->call_argc = htons(io_arraySize(RPC_RETVARS(c)));
408: /* Go Encapsulate variables */
409: ret = io_vars2buffer(buf + wlen, sizeof buf - wlen, RPC_RETVARS(c));
410: /* Free return values */
411: io_freeVars(&c->cli_vars);
412: if (ret == -1) {
413: rpc_SetErr(EBADRPC, "Prepare RPC packet failed");
414: rpc->call_argc ^= rpc->call_argc;
415: rpc->call_rep.ret = RPC_ERROR(-1);
416: rpc->call_rep.eno = RPC_ERROR(rpc_Errno);
417: } else
418: wlen += ret;
419: }
420: }
421:
422: rpc->call_len = htons(wlen);
423:
424: /* calculate CRC */
425: rpc->call_crc ^= rpc->call_crc;
426: rpc->call_crc = htons(crcFletcher16((u_short*) buf, wlen / 2));
427:
428: /* send reply */
429: ret = sendto(TASK_FD(task), buf, wlen, MSG_NOSIGNAL,
430: &c->cli_sa.sa, c->cli_sa.sa.sa_len);
431: if (ret == -1 || ret != wlen) {
432: /* close connection */
433: schedEvent(TASK_ROOT(task), cbProto[s->srv_proto][CB_CLOSECLIENT],
434: TASK_ARG(task), 0, NULL, 0);
435: }
436:
437: return NULL;
438: }
439:
440: static void *
441: rxUDPPacket(sched_task_t *task)
442: {
443: rpc_srv_t *srv = TASK_ARG(task);
444: rpc_cli_t *c = NULL;
445: socklen_t salen = sizeof(io_sockaddr_t);
446: int len, rlen, noreply;
447: u_short crc, off = 0;
448: u_char buf[USHRT_MAX + 1];
449: struct tagRPCCall *rpc = (struct tagRPCCall*) buf;
450: io_sockaddr_t sa;
451: struct timespec ts = { DEF_RPC_TIMEOUT, 0 };
452:
453: /* receive connect packet */
454: rlen = recvfrom(TASK_FD(task), buf, sizeof buf, 0, &sa.sa, &salen);
455: if (rlen < 1)
456: goto end;
457:
458: c = _allocClient(srv, &sa);
459: if (!c)
460: goto end;
461: else {
462: c->cli_sock = TASK_FD(task);
463: memcpy(&c->cli_sa, &sa, sizeof c->cli_sa);
464: memcpy(AIT_GET_BUF(&c->cli_buf), buf, AIT_LEN(&c->cli_buf));
465: /* armed timer for close stateless connection */
466: schedCancelby(TASK_ROOT(task), taskTIMER, CRITERIA_DATA, c, NULL);
467: schedTimer(TASK_ROOT(task), cbProto[srv->srv_proto][CB_CLOSECLIENT],
468: c, ts, c, 0);
469: }
470:
471: do {
472: /* check RPC packet */
473: if (rlen < sizeof(struct tagRPCCall)) {
474: rpc_SetErr(ERPCMISMATCH, "Short RPC packet");
475: break;
476: } else
477: rpc = (struct tagRPCCall*) (AIT_GET_BUF(&c->cli_buf) + off);
478:
479: len = ntohs(rpc->call_len);
480: rlen -= len;
481:
482: /* check RPC packet lengths */
483: if (rlen < 0 || len < sizeof(struct tagRPCCall)) {
484: rpc_SetErr(ERPCMISMATCH, "Broken RPC packet length");
485: /* skip entire packet */
486: break;
487: }
488:
489: /* check integrity of packet */
490: crc = ntohs(rpc->call_crc);
491: rpc->call_crc ^= rpc->call_crc;
492: if (crc != crcFletcher16((u_short*) rpc, len / 2)) {
493: rpc_SetErr(ERPCMISMATCH, "Bad CRC RPC packet");
494:
495: off += len;
496: /* try next packet remaining into buffer */
497: continue;
498: }
499:
500: noreply = RPC_CHK_NOREPLY(rpc);
501:
502: /* check RPC packet session info */
503: if (rpc_chkPktSession(&rpc->call_session, &srv->srv_session)) {
504: rpc_SetErr(ERPCMISMATCH, "Get invalid RPC session");
505: rpc->call_argc ^= rpc->call_argc;
506: rpc->call_rep.ret = RPC_ERROR(-1);
507: rpc->call_rep.eno = RPC_ERROR(errno);
508: } else {
509: /* execute RPC call */
510: schedEvent(TASK_ROOT(task), execCall, c, off, NULL, 0);
511: }
512:
513: /* send RPC reply */
514: if (!noreply)
515: schedWrite(TASK_ROOT(task), cbProto[srv->srv_proto][CB_TXPACKET],
516: c, TASK_FD(task), rpc, len);
517:
518: off += len;
519: } while (rlen > 0);
520:
521: end:
522: schedReadSelf(task);
523: return NULL;
524: }
525:
526: /* ------------------------------------------------------ */
527:
528: inline void
529: rpc_freeBLOBCli(rpc_cli_t * __restrict c)
530: {
531: rpc_srv_t *s = c->cli_parent;
532:
533: schedCancelby(s->srv_blob.root, taskMAX, CRITERIA_ARG, c, NULL);
534:
535: /* free buffer */
536: AIT_FREE_VAL(&c->cli_buf);
537:
538: io_arrayDel(s->srv_blob.clients, c->cli_id, 0);
539: if (c)
540: io_free(c);
541: }
542:
543:
544: static void *
545: closeBLOBClient(sched_task_t *task)
546: {
547: int sock = ((rpc_cli_t*) TASK_ARG(task))->cli_sock;
548:
549: rpc_freeBLOBCli(TASK_ARG(task));
550:
551: /* close client socket */
552: shutdown(sock, SHUT_RDWR);
553: close(sock);
554: return NULL;
555: }
556:
557: static void *
558: txBLOB(sched_task_t *task)
559: {
560: rpc_cli_t *c = TASK_ARG(task);
561: u_char *buf = AIT_GET_BUF(&c->cli_buf);
562: struct tagBLOBHdr *blob = (struct tagBLOBHdr *) buf;
563: int wlen = sizeof(struct tagBLOBHdr);
564:
565: /* calculate CRC */
566: blob->hdr_crc ^= blob->hdr_crc;
567: blob->hdr_crc = htons(crcFletcher16((u_short*) buf, wlen / 2));
568:
569: /* send reply */
570: wlen = send(TASK_FD(task), buf, wlen, MSG_NOSIGNAL);
571: if (wlen == -1 || wlen != sizeof(struct tagBLOBHdr)) {
572: /* close blob connection */
573: schedEvent(TASK_ROOT(task), closeBLOBClient, c, 42, NULL, 0);
574: }
575:
576: return NULL;
577: }
578:
579: static void *
580: rxBLOB(sched_task_t *task)
581: {
582: rpc_cli_t *c = TASK_ARG(task);
583: rpc_srv_t *s = c->cli_parent;
584: rpc_blob_t *b;
585: struct tagBLOBHdr blob;
586: int rlen;
587: u_short crc;
588:
589: memset(&blob, 0, sizeof blob);
590: rlen = recv(TASK_FD(task), &blob, sizeof blob, 0);
591: if (rlen < 1) {
592: /* close blob connection */
593: schedEvent(TASK_ROOT(task), closeBLOBClient, c, 42, NULL, 0);
594: return NULL;
595: }
596:
597: /* check BLOB packet */
598: if (rlen < sizeof(struct tagBLOBHdr)) {
599: rpc_SetErr(ERPCMISMATCH, "Short BLOB packet");
600:
601: schedReadSelf(task);
602: return NULL;
603: }
604:
605: /* check integrity of packet */
606: crc = ntohs(blob.hdr_crc);
607: blob.hdr_crc ^= blob.hdr_crc;
608: if (crc != crcFletcher16((u_short*) &blob, rlen / 2)) {
609: rpc_SetErr(ERPCMISMATCH, "Bad CRC BLOB packet");
610:
611: schedReadSelf(task);
612: return NULL;
613: }
614:
615: /* check RPC packet session info */
616: if ((crc = rpc_chkPktSession(&blob.hdr_session, &s->srv_session))) {
617: rpc_SetErr(ERPCMISMATCH, "Get invalid RPC session");
618: blob.hdr_cmd = error;
619: goto end;
620: }
621:
622: /* Go to proceed packet ... */
623: switch (blob.hdr_cmd) {
624: case get:
625: if (!(b = rpc_srv_getBLOB(s, ntohl(blob.hdr_var)))) {
626: rpc_SetErr(EINVAL, "Var=%x not found", ntohl(blob.hdr_var));
627: blob.hdr_cmd = no;
628: blob.hdr_ret = RPC_ERROR(-1);
629: break;
630: } else
631: blob.hdr_len = htonl(b->blob_len);
632:
633: if (rpc_srv_blobMap(s, b) != -1) {
634: /* deliver BLOB variable to client */
635: blob.hdr_ret = htonl(rpc_srv_sendBLOB(c, b));
636: rpc_srv_blobUnmap(b);
637: } else {
638: blob.hdr_cmd = error;
639: blob.hdr_ret = RPC_ERROR(-1);
640: }
641: break;
642: case set:
643: if ((b = rpc_srv_registerBLOB(s, ntohl(blob.hdr_len)))) {
644: /* set new BLOB variable for reply :) */
645: blob.hdr_var = htonl(b->blob_var);
646:
647: /* receive BLOB from client */
648: blob.hdr_ret = htonl(rpc_srv_recvBLOB(c, b));
649: rpc_srv_blobUnmap(b);
650: } else {
651: blob.hdr_cmd = error;
652: blob.hdr_ret = RPC_ERROR(-1);
653: }
654: break;
655: case unset:
656: if (rpc_srv_unregisterBLOB(s, ntohl(blob.hdr_var)) == -1) {
657: blob.hdr_cmd = error;
658: blob.hdr_ret = RPC_ERROR(-1);
659: }
660: break;
661: default:
662: rpc_SetErr(EPROCUNAVAIL, "Unsupported BLOB command %d", blob.hdr_cmd);
663: blob.hdr_cmd = error;
664: blob.hdr_ret = RPC_ERROR(-1);
665: }
666:
667: end:
668: memcpy(AIT_ADDR(&c->cli_buf), &blob, sizeof blob);
669: schedWrite(TASK_ROOT(task), txBLOB, TASK_ARG(task), TASK_FD(task), NULL, 0);
670: schedReadSelf(task);
671: return NULL;
672: }
673:
674: static void *
675: acceptBLOBClients(sched_task_t *task)
676: {
677: rpc_srv_t *srv = TASK_ARG(task);
678: rpc_cli_t *c = NULL;
679: register int i;
680: socklen_t salen = sizeof(io_sockaddr_t);
681: #ifdef TCP_NOPUSH
682: int n = 1;
683: #endif
684:
685: /* check free slots for connect */
686: for (i = 0; i < io_arraySize(srv->srv_blob.clients) &&
687: (c = io_array(srv->srv_blob.clients, i, rpc_cli_t*)); i++);
688: if (c) /* no more free slots! */
689: goto end;
690: c = io_malloc(sizeof(rpc_cli_t));
691: if (!c) {
692: LOGERR;
693: srv->srv_kill = srv->srv_blob.kill = 1;
694: return NULL;
695: } else {
696: memset(c, 0, sizeof(rpc_cli_t));
697: io_arraySet(srv->srv_blob.clients, i, c);
698: c->cli_id = i;
699: c->cli_parent = srv;
700: }
701:
702: /* alloc empty buffer */
703: AIT_SET_BUF2(&c->cli_buf, 0, srv->srv_netbuf);
704:
705: /* accept client */
706: c->cli_sock = accept(TASK_FD(task), &c->cli_sa.sa, &salen);
707: if (c->cli_sock == -1) {
708: LOGERR;
709: AIT_FREE_VAL(&c->cli_buf);
710: io_arrayDel(srv->srv_blob.clients, i, 42);
711: goto end;
712: } else {
713: #ifdef TCP_NOPUSH
714: setsockopt(c->cli_sock, IPPROTO_TCP, TCP_NOPUSH, &n, sizeof n);
715: #endif
716: fcntl(c->cli_sock, F_SETFL, fcntl(c->cli_sock, F_GETFL) | O_NONBLOCK);
717: }
718:
719: schedRead(TASK_ROOT(task), rxBLOB, c, c->cli_sock, NULL, 0);
720: end:
721: schedReadSelf(task);
722: return NULL;
723: }
724:
725: /* ------------------------------------------------------ */
726:
727: /*
728: * rpc_srv_initBLOBServer() - Init & create BLOB Server
729: *
730: * @srv = RPC server instance
731: * @Port = Port for bind server, if Port == 0 default port is selected
732: * @diskDir = Disk place for BLOB file objects
733: * return: -1 == error or 0 bind and created BLOB server instance
734: */
735: int
736: rpc_srv_initBLOBServer(rpc_srv_t * __restrict srv, u_short Port, const char *diskDir)
737: {
738: int n = 1;
739:
740: if (!srv || srv->srv_kill) {
741: rpc_SetErr(EINVAL, "Invalid parameters can`t init BLOB server");
742: return -1;
743: }
744:
745: memset(&srv->srv_blob, 0, sizeof srv->srv_blob);
746: if (access(diskDir, R_OK | W_OK) == -1) {
747: LOGERR;
748: return -1;
749: } else
750: AIT_SET_STR(&srv->srv_blob.dir, diskDir);
751:
752: /* init blob list */
753: TAILQ_INIT(&srv->srv_blob.blobs);
754:
755: srv->srv_blob.server.cli_parent = srv;
756:
757: memcpy(&srv->srv_blob.server.cli_sa, &srv->srv_server.cli_sa, sizeof(io_sockaddr_t));
758: switch (srv->srv_blob.server.cli_sa.sa.sa_family) {
759: case AF_INET:
760: srv->srv_blob.server.cli_sa.sin.sin_port =
761: htons(Port ? Port : ntohs(srv->srv_blob.server.cli_sa.sin.sin_port) + 1);
762: break;
763: case AF_INET6:
764: srv->srv_blob.server.cli_sa.sin6.sin6_port =
765: htons(Port ? Port : ntohs(srv->srv_blob.server.cli_sa.sin6.sin6_port) + 1);
766: break;
767: case AF_LOCAL:
768: strlcat(srv->srv_blob.server.cli_sa.sun.sun_path, ".blob",
769: sizeof srv->srv_blob.server.cli_sa.sun.sun_path);
770: break;
771: default:
772: AIT_FREE_VAL(&srv->srv_blob.dir);
773: return -1;
774: }
775:
776: /* create BLOB server socket */
777: srv->srv_blob.server.cli_sock = socket(srv->srv_server.cli_sa.sa.sa_family, SOCK_STREAM, 0);
778: if (srv->srv_blob.server.cli_sock == -1) {
779: LOGERR;
780: AIT_FREE_VAL(&srv->srv_blob.dir);
781: return -1;
782: }
783: if (setsockopt(srv->srv_blob.server.cli_sock, SOL_SOCKET, SO_REUSEADDR, &n, sizeof n) == -1) {
784: LOGERR;
785: close(srv->srv_blob.server.cli_sock);
786: AIT_FREE_VAL(&srv->srv_blob.dir);
787: return -1;
788: }
789: n = srv->srv_netbuf;
790: if (setsockopt(srv->srv_blob.server.cli_sock, SOL_SOCKET, SO_SNDBUF, &n, sizeof n) == -1) {
791: LOGERR;
792: close(srv->srv_blob.server.cli_sock);
793: AIT_FREE_VAL(&srv->srv_blob.dir);
794: return -1;
795: }
796: if (setsockopt(srv->srv_blob.server.cli_sock, SOL_SOCKET, SO_RCVBUF, &n, sizeof n) == -1) {
797: LOGERR;
798: close(srv->srv_blob.server.cli_sock);
799: AIT_FREE_VAL(&srv->srv_blob.dir);
800: return -1;
801: }
802: if (bind(srv->srv_blob.server.cli_sock, &srv->srv_blob.server.cli_sa.sa,
803: srv->srv_blob.server.cli_sa.sa.sa_len) == -1) {
804: LOGERR;
805: close(srv->srv_blob.server.cli_sock);
806: AIT_FREE_VAL(&srv->srv_blob.dir);
807: return -1;
808: } else
809: fcntl(srv->srv_blob.server.cli_sock, F_SETFL,
810: fcntl(srv->srv_blob.server.cli_sock, F_GETFL) | O_NONBLOCK);
811:
812:
813: /* allocate pool for concurent blob clients */
814: srv->srv_blob.clients = io_arrayInit(io_arraySize(srv->srv_clients));
815: if (!srv->srv_blob.clients) {
816: rpc_SetErr(io_GetErrno(), "%s", io_GetError());
817: close(srv->srv_blob.server.cli_sock);
818: AIT_FREE_VAL(&srv->srv_blob.dir);
819: return -1;
820: }
821:
822: /* init blob scheduler */
823: srv->srv_blob.root = schedBegin();
824: if (!srv->srv_blob.root) {
825: rpc_SetErr(sched_GetErrno(), "%s", sched_GetError());
826: io_arrayDestroy(&srv->srv_blob.clients);
827: close(srv->srv_blob.server.cli_sock);
828: AIT_FREE_VAL(&srv->srv_blob.dir);
829: return -1;
830: }
831:
832: return 0;
833: }
834:
835: /*
836: * rpc_srv_endBLOBServer() - Destroy BLOB server, close all opened sockets and free resources
837: *
838: * @srv = RPC Server instance
839: * return: none
840: */
841: inline void
842: rpc_srv_endBLOBServer(rpc_srv_t * __restrict srv)
843: {
844: if (!srv)
845: return;
846:
847: srv->srv_blob.kill = 1;
848: }
849:
850: /*
851: * rpc_srv_loopBLOBServer() - Execute Main BLOB server loop and wait for clients requests
852: *
853: * @srv = RPC Server instance
854: * return: -1 error or 0 ok, infinite loop ...
855: */
856: int
857: rpc_srv_loopBLOBServer(rpc_srv_t * __restrict srv)
858: {
859: rpc_cli_t *c;
860: register int i;
861: rpc_blob_t *b, *tmp;
862: struct timespec ts = { RPC_SCHED_POLLING, 0 };
863:
864: if (!srv || srv->srv_kill) {
865: rpc_SetErr(EINVAL, "Invalid parameter can`t start BLOB server");
866: return -1;
867: }
868:
869: if (listen(srv->srv_blob.server.cli_sock, io_arraySize(srv->srv_blob.clients)) == -1) {
870: LOGERR;
871: return -1;
872: }
873:
874: if (!schedRead(srv->srv_blob.root, acceptBLOBClients, srv,
875: srv->srv_blob.server.cli_sock, NULL, 0)) {
876: rpc_SetErr(sched_GetErrno(), "%s", sched_GetError());
877: return -1;
878: }
879:
880: schedPolling(srv->srv_blob.root, &ts, NULL);
881: /* main rpc loop */
882: schedRun(srv->srv_blob.root, &srv->srv_blob.kill);
883:
884: /* close all clients connections & server socket */
885: for (i = 0; i < io_arraySize(srv->srv_blob.clients); i++) {
886: c = io_array(srv->srv_blob.clients, i, rpc_cli_t*);
887: if (c) {
888: shutdown(c->cli_sock, SHUT_RDWR);
889: close(c->cli_sock);
890:
891: schedCancelby(srv->srv_blob.root, taskMAX, CRITERIA_ARG, c, NULL);
892: AIT_FREE_VAL(&c->cli_buf);
893: }
894: io_arrayDel(srv->srv_blob.clients, i, 42);
895: }
896: io_arrayDestroy(&srv->srv_blob.clients);
897:
898: close(srv->srv_blob.server.cli_sock);
899:
900: /* detach blobs */
901: TAILQ_FOREACH_SAFE(b, &srv->srv_blob.blobs, blob_node, tmp) {
902: TAILQ_REMOVE(&srv->srv_blob.blobs, b, blob_node);
903:
904: rpc_srv_blobFree(srv, b);
905: io_free(b);
906: }
907:
908: schedEnd(&srv->srv_blob.root);
909: AIT_FREE_VAL(&srv->srv_blob.dir);
910: return 0;
911: }
912:
913:
914: /*
915: * rpc_srv_initServer() - Init & create RPC Server
916: *
917: * @regProgID = ProgramID for authentication & recognition
918: * @regProcID = ProcessID for authentication & recognition
919: * @concurentClients = Concurent clients at same time to this server
920: * @netBuf = Network buffer length (min:512 bytes), if =0 == BUFSIZ (also meaning max RPC packet)
921: * @csHost = Host name or address for bind server, if NULL any address
922: * @Port = Port for bind server, if Port == 0 default port is selected
923: * @proto = Protocol, if == 0 choose SOCK_STREAM
924: * return: NULL == error or !=NULL bind and created RPC server instance
925: */
926: rpc_srv_t *
927: rpc_srv_initServer(u_int regProgID, u_char regProcID, int concurentClients,
928: int netBuf, const char *csHost, u_short Port, int proto)
929: {
930: int n = 1;
931: rpc_srv_t *srv = NULL;
932: io_sockaddr_t sa = IO_SOCKADDR_INIT;
933:
934: if (!concurentClients || !regProgID || (proto < 0 || proto > SOCK_DGRAM)) {
935: rpc_SetErr(EINVAL, "Invalid parameters can`t init RPC server");
936: return NULL;
937: }
938: if (!io_gethostbyname(csHost, Port, &sa))
939: return NULL;
940: if (!Port)
941: Port = RPC_DEFPORT;
942: if (!proto)
943: proto = SOCK_STREAM;
944: if (netBuf < RPC_MIN_BUFSIZ)
945: netBuf = BUFSIZ;
946: else
947: netBuf = io_align(netBuf, 2); /* align netBuf length */
948:
949: #ifdef HAVE_SRANDOMDEV
950: srandomdev();
951: #else
952: time_t tim;
953:
954: srandom((time(&tim) ^ getpid()));
955: #endif
956:
957: srv = io_malloc(sizeof(rpc_srv_t));
958: if (!srv) {
959: LOGERR;
960: return NULL;
961: } else
962: memset(srv, 0, sizeof(rpc_srv_t));
963:
964: srv->srv_proto = proto;
965: srv->srv_netbuf = netBuf;
966: srv->srv_session.sess_version = RPC_VERSION;
967: srv->srv_session.sess_program = regProgID;
968: srv->srv_session.sess_process = regProcID;
969:
970: srv->srv_server.cli_parent = srv;
971: memcpy(&srv->srv_server.cli_sa, &sa, sizeof srv->srv_server.cli_sa);
972:
973: /* init functions */
974: pthread_mutex_init(&srv->srv_funcs.mtx, NULL);
975: SLIST_INIT(&srv->srv_funcs);
976: AVL_INIT(&srv->srv_funcs);
977:
978: /* init scheduler */
979: srv->srv_root = schedBegin();
980: if (!srv->srv_root) {
981: rpc_SetErr(sched_GetErrno(), "%s", sched_GetError());
982: pthread_mutex_destroy(&srv->srv_funcs.mtx);
983: io_free(srv);
984: return NULL;
985: }
986:
987: /* init pool for clients */
988: srv->srv_clients = io_arrayInit(concurentClients);
989: if (!srv->srv_clients) {
990: rpc_SetErr(io_GetErrno(), "%s", io_GetError());
991: schedEnd(&srv->srv_root);
992: pthread_mutex_destroy(&srv->srv_funcs.mtx);
993: io_free(srv);
994: return NULL;
995: }
996:
997: /* create server socket */
998: srv->srv_server.cli_sock = socket(srv->srv_server.cli_sa.sa.sa_family, srv->srv_proto, 0);
999: if (srv->srv_server.cli_sock == -1) {
1000: LOGERR;
1001: io_arrayDestroy(&srv->srv_clients);
1002: schedEnd(&srv->srv_root);
1003: pthread_mutex_destroy(&srv->srv_funcs.mtx);
1004: io_free(srv);
1005: return NULL;
1006: }
1007: if (setsockopt(srv->srv_server.cli_sock, SOL_SOCKET, SO_REUSEADDR, &n, sizeof n) == -1) {
1008: LOGERR;
1009: goto err;
1010: }
1011: n = srv->srv_netbuf;
1012: if (setsockopt(srv->srv_server.cli_sock, SOL_SOCKET, SO_SNDBUF, &n, sizeof n) == -1) {
1013: LOGERR;
1014: goto err;
1015: }
1016: if (setsockopt(srv->srv_server.cli_sock, SOL_SOCKET, SO_RCVBUF, &n, sizeof n) == -1) {
1017: LOGERR;
1018: goto err;
1019: }
1020: if (bind(srv->srv_server.cli_sock, &srv->srv_server.cli_sa.sa,
1021: srv->srv_server.cli_sa.sa.sa_len) == -1) {
1022: LOGERR;
1023: goto err;
1024: } else
1025: fcntl(srv->srv_server.cli_sock, F_SETFL,
1026: fcntl(srv->srv_server.cli_sock, F_GETFL) | O_NONBLOCK);
1027:
1028: rpc_register_srvPing(srv);
1029:
1030: return srv;
1031: err: /* error condition */
1032: close(srv->srv_server.cli_sock);
1033: io_arrayDestroy(&srv->srv_clients);
1034: schedEnd(&srv->srv_root);
1035: pthread_mutex_destroy(&srv->srv_funcs.mtx);
1036: io_free(srv);
1037: return NULL;
1038: }
1039:
1040: /*
1041: * rpc_srv_endServer() - Destroy RPC server, close all opened sockets and free resources
1042: *
1043: * @psrv = RPC Server instance
1044: * return: none
1045: */
1046: inline void
1047: rpc_srv_endServer(rpc_srv_t ** __restrict psrv)
1048: {
1049: if (!psrv || !*psrv)
1050: return;
1051:
1052: /* if send kill to blob server */
1053: if (!(*psrv)->srv_blob.kill)
1054: rpc_srv_endBLOBServer(*psrv);
1055:
1056: (*psrv)->srv_kill = 1;
1057: sleep(RPC_SCHED_POLLING);
1058:
1059: pthread_mutex_destroy(&(*psrv)->srv_funcs.mtx);
1060: io_free(*psrv);
1061: *psrv = NULL;
1062: }
1063:
1064: /*
1065: * rpc_srv_loopServer() - Execute Main server loop and wait for clients requests
1066: *
1067: * @srv = RPC Server instance
1068: * return: -1 error or 0 ok, infinite loop ...
1069: */
1070: int
1071: rpc_srv_loopServer(rpc_srv_t * __restrict srv)
1072: {
1073: rpc_cli_t *c;
1074: register int i;
1075: rpc_func_t *f;
1076: struct timespec ts = { RPC_SCHED_POLLING, 0 };
1077:
1078: if (!srv) {
1079: rpc_SetErr(EINVAL, "Invalid parameter can`t start RPC server");
1080: return -1;
1081: }
1082:
1083: if (srv->srv_proto == SOCK_STREAM)
1084: if (listen(srv->srv_server.cli_sock,
1085: io_arraySize(srv->srv_clients)) == -1) {
1086: LOGERR;
1087: return -1;
1088: }
1089:
1090: if (!schedRead(srv->srv_root, cbProto[srv->srv_proto][CB_ACCEPTCLIENT], srv,
1091: srv->srv_server.cli_sock, NULL, 0)) {
1092: rpc_SetErr(sched_GetErrno(), "%s", sched_GetError());
1093: return -1;
1094: }
1095:
1096: schedPolling(srv->srv_root, &ts, NULL);
1097: /* main rpc loop */
1098: schedRun(srv->srv_root, &srv->srv_kill);
1099:
1100: /* close all clients connections & server socket */
1101: for (i = 0; i < io_arraySize(srv->srv_clients); i++) {
1102: c = io_array(srv->srv_clients, i, rpc_cli_t*);
1103: if (c) {
1104: shutdown(c->cli_sock, SHUT_RDWR);
1105: close(c->cli_sock);
1106:
1107: schedCancelby(srv->srv_root, taskMAX, CRITERIA_ARG, c, NULL);
1108: io_freeVars(&RPC_RETVARS(c));
1109: AIT_FREE_VAL(&c->cli_buf);
1110: }
1111: io_arrayDel(srv->srv_clients, i, 42);
1112: }
1113: io_arrayDestroy(&srv->srv_clients);
1114:
1115: close(srv->srv_server.cli_sock);
1116:
1117: /* detach exported calls */
1118: RPC_FUNCS_LOCK(&srv->srv_funcs);
1119: while ((f = SLIST_FIRST(&srv->srv_funcs))) {
1120: SLIST_REMOVE_HEAD(&srv->srv_funcs, func_next);
1121:
1122: AIT_FREE_VAL(&f->func_name);
1123: io_free(f);
1124: }
1125: srv->srv_funcs.avlh_root = NULL;
1126: RPC_FUNCS_UNLOCK(&srv->srv_funcs);
1127:
1128: schedEnd(&srv->srv_root);
1129: return 0;
1130: }
1131:
1132:
1133: /*
1134: * rpc_srv_execCall() Execute registered call from RPC server
1135: *
1136: * @cli = RPC client
1137: * @rpc = IN RPC call structure
1138: * @funcname = Execute RPC function
1139: * @args = IN RPC calling arguments from RPC client
1140: * return: -1 error, !=-1 ok
1141: */
1142: int
1143: rpc_srv_execCall(rpc_cli_t * __restrict cli, struct tagRPCCall * __restrict rpc,
1144: ait_val_t funcname, array_t * __restrict args)
1145: {
1146: rpc_callback_t func;
1147:
1148: if (!cli || !rpc || !AIT_ADDR(&funcname)) {
1149: rpc_SetErr(EINVAL, "Invalid parameter can`t exec function");
1150: return -1;
1151: }
1152:
1153: func = AIT_GET_LIKE(&funcname, rpc_callback_t);
1154: return func(cli, rpc, args);
1155: }
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