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 1.20.4.2 2013/11/13 12:18:43 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, 2013
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: void
71: rpc_freeCli(rpc_cli_t * __restrict c)
72: {
73: rpc_srv_t *s = c->cli_parent;
74:
75: schedCancelby(s->srv_root, taskMAX, CRITERIA_ARG, c, NULL);
76:
77: /* free buffer */
78: AIT_FREE_VAL(&c->cli_buf);
79:
80: array_Del(s->srv_clients, c->cli_id, 0);
81: if (c)
82: e_free(c);
83: }
84:
85:
86: static inline int
87: _check4freeslot(rpc_srv_t * __restrict srv, sockaddr_t * __restrict sa)
88: {
89: rpc_cli_t *c = NULL;
90: register int i;
91:
92: /* check free slots for connect */
93: for (i = 0; i < array_Size(srv->srv_clients) &&
94: (c = array(srv->srv_clients, i, rpc_cli_t*)); i++)
95: /* check for duplicates */
96: if (sa && !e_addrcmp(&c->cli_sa, sa, 42))
97: break;
98: if (i >= array_Size(srv->srv_clients))
99: return -1; /* no more free slots! */
100:
101: return i;
102: }
103:
104: static rpc_cli_t *
105: _allocClient(rpc_srv_t * __restrict srv, sockaddr_t * __restrict sa)
106: {
107: rpc_cli_t *c = NULL;
108: int n;
109:
110: n = _check4freeslot(srv, sa);
111: if (n == -1)
112: return NULL;
113: else
114: c = array(srv->srv_clients, n, rpc_cli_t*);
115:
116: if (!c) {
117: c = e_malloc(sizeof(rpc_cli_t));
118: if (!c) {
119: LOGERR;
120: srv->srv_kill = 1;
121: return NULL;
122: } else {
123: memset(c, 0, sizeof(rpc_cli_t));
124: array_Set(srv->srv_clients, n, c);
125: c->cli_id = n;
126: c->cli_parent = srv;
127: }
128:
129: /* alloc empty buffer */
130: AIT_SET_BUFSIZ(&c->cli_buf, 0, srv->srv_netbuf);
131: }
132:
133: return c;
134: }
135:
136:
137: static void *
138: freeClient(sched_task_t *task)
139: {
140: rpc_freeCli(TASK_ARG(task));
141:
142: return NULL;
143: }
144:
145: static void *
146: closeClient(sched_task_t *task)
147: {
148: int sock = ((rpc_cli_t*) TASK_ARG(task))->cli_sock;
149:
150: rpc_freeCli(TASK_ARG(task));
151:
152: /* close client socket */
153: shutdown(sock, SHUT_RDWR);
154: close(sock);
155: return NULL;
156: }
157:
158: static void *
159: txPacket(sched_task_t *task)
160: {
161: rpc_cli_t *c = TASK_ARG(task);
162: rpc_srv_t *s = c->cli_parent;
163: rpc_func_t *f = NULL;
164: u_char *buf = AIT_GET_BUF(&c->cli_buf);
165: struct tagRPCCall *rpc = (struct tagRPCCall*) buf;
166: int ret, estlen, wlen = sizeof(struct tagRPCCall);
167: struct pollfd pfd;
168:
169: if (rpc->call_argc) {
170: f = rpc_srv_getCall(s, ntohs(rpc->call_tag));
171: if (!f) {
172: rpc_SetErr(EPROGUNAVAIL, "Function not found at RPC server");
173:
174: rpc->call_argc ^= rpc->call_argc;
175: rpc->call_rep.ret = RPC_ERROR(-1);
176: rpc->call_rep.eno = RPC_ERROR(rpc_Errno);
177: } else {
178: /* calc estimated length */
179: estlen = ait_resideVars(RPC_RETVARS(c)) + wlen;
180: if (estlen > AIT_LEN(&c->cli_buf))
181: AIT_RE_BUF(&c->cli_buf, estlen);
182: buf = AIT_GET_BUF(&c->cli_buf);
183: rpc = (struct tagRPCCall*) buf;
184:
185: rpc->call_argc = htons(array_Size(RPC_RETVARS(c)));
186: /* Go Encapsulate variables */
187: ret = ait_vars2buffer(buf + wlen, AIT_LEN(&c->cli_buf) - wlen,
188: RPC_RETVARS(c));
189: /* Free return values */
190: ait_freeVars(&c->cli_vars);
191: if (ret == -1) {
192: rpc_SetErr(EBADRPC, "Prepare RPC packet failed");
193:
194: rpc->call_argc ^= rpc->call_argc;
195: rpc->call_rep.ret = RPC_ERROR(-1);
196: rpc->call_rep.eno = RPC_ERROR(rpc_Errno);
197: } else
198: wlen += ret;
199: }
200: }
201:
202: rpc->call_len = htonl(wlen);
203:
204: #if 0
205: /* calculate CRC */
206: rpc->call_crc ^= rpc->call_crc;
207: rpc->call_crc = htons(crcFletcher16((u_short*) buf, wlen / 2));
208: #endif
209:
210: /* send reply */
211: pfd.fd = TASK_FD(task);
212: pfd.events = POLLOUT;
213: for (; wlen > 0; wlen -= ret, buf += ret) {
214: if ((ret = poll(&pfd, 1, DEF_RPC_TIMEOUT * 1000)) < 1 ||
215: pfd.revents & (POLLERR | POLLHUP | POLLNVAL)) {
216: if (ret)
217: LOGERR;
218: else
219: rpc_SetErr(ETIMEDOUT, "Timeout reached! Server not respond");
220: /* close connection */
221: schedEvent(TASK_ROOT(task), cbProto[s->srv_proto][CB_CLOSECLIENT],
222: TASK_ARG(task), 0, NULL, 0);
223: return NULL;
224: }
225: ret = send(TASK_FD(task), buf, MIN(wlen, s->srv_netbuf), MSG_NOSIGNAL);
226: if (ret == -1) {
227: /* close connection */
228: schedEvent(TASK_ROOT(task), cbProto[s->srv_proto][CB_CLOSECLIENT],
229: TASK_ARG(task), 0, NULL, 0);
230: return NULL;
231: }
232: }
233:
234: return NULL;
235: }
236:
237: static void *
238: execCall(sched_task_t *task)
239: {
240: rpc_cli_t *c = TASK_ARG(task);
241: rpc_srv_t *s = c->cli_parent;
242: rpc_func_t *f = NULL;
243: array_t *arr = NULL;
244: u_char *buf = AIT_GET_BUF(&c->cli_buf);
245: struct tagRPCCall *rpc = (struct tagRPCCall*) buf;
246: int argc = ntohs(rpc->call_argc);
247:
248: /* Go decapsulate variables ... */
249: if (argc) {
250: arr = ait_buffer2vars(buf + sizeof(struct tagRPCCall),
251: AIT_LEN(&c->cli_buf) - sizeof(struct tagRPCCall), argc, 42);
252: if (!arr) {
253: rpc_SetErr(ERPCMISMATCH, "#%d - %s", elwix_GetErrno(), elwix_GetError());
254:
255: rpc->call_argc ^= rpc->call_argc;
256: rpc->call_rep.ret = RPC_ERROR(-1);
257: rpc->call_rep.eno = RPC_ERROR(rpc_Errno);
258: return NULL;
259: }
260: } else
261: arr = NULL;
262:
263: if (!(f = rpc_srv_getCall(s, ntohs(rpc->call_tag)))) {
264: rpc_SetErr(EPROGUNAVAIL, "Function not found at RPC server");
265:
266: rpc->call_argc ^= rpc->call_argc;
267: rpc->call_rep.ret = RPC_ERROR(-1);
268: rpc->call_rep.eno = RPC_ERROR(rpc_Errno);
269: } else {
270: /* if client doesn't want reply */
271: argc = RPC_CHK_NOREPLY(rpc);
272: rpc->call_rep.ret = RPC_ERROR(rpc_srv_execCall(c, rpc, f->func_name, arr));
273: if (rpc->call_rep.ret == htonl(-1)) {
274: if (!rpc->call_rep.eno) {
275: LOGERR;
276: rpc->call_rep.eno = RPC_ERROR(rpc_Errno);
277: }
278: rpc->call_argc ^= rpc->call_argc;
279: } else {
280: rpc->call_rep.eno ^= rpc->call_rep.eno;
281: if (argc) {
282: /* without reply */
283: ait_freeVars(&c->cli_vars);
284: rpc->call_argc ^= rpc->call_argc;
285: } else {
286: /* reply */
287: rpc->call_argc = htons(array_Size(RPC_RETVARS(c)));
288: }
289: }
290: }
291:
292: array_Destroy(&arr);
293: return NULL;
294: }
295:
296: static void *
297: rxPacket(sched_task_t *task)
298: {
299: rpc_cli_t *c = TASK_ARG(task);
300: rpc_srv_t *s = c->cli_parent;
301: int len, rlen, noreply, estlen;
302: #if 0
303: u_short crc;
304: #endif
305: u_char *buf = AIT_GET_BUF(&c->cli_buf);
306: struct tagRPCCall *rpc = (struct tagRPCCall*) buf;
307: struct pollfd pfd;
308:
309: memset(buf, 0, sizeof(struct tagRPCCall));
310: rlen = recv(TASK_FD(task), rpc, sizeof(struct tagRPCCall), MSG_PEEK);
311: if (rlen < sizeof(struct tagRPCCall)) {
312: /* close connection */
313: schedEvent(TASK_ROOT(task), cbProto[s->srv_proto][CB_CLOSECLIENT],
314: TASK_ARG(task), 0, NULL, 0);
315: return NULL;
316: } else {
317: estlen = ntohl(rpc->call_len);
318: if (estlen > AIT_LEN(&c->cli_buf))
319: AIT_RE_BUF(&c->cli_buf, estlen);
320: rpc = (struct tagRPCCall*) AIT_GET_BUF(&c->cli_buf);
321: buf = AIT_GET_BUF(&c->cli_buf);
322: len = estlen;
323: }
324:
325: /* get next part of packet */
326: memset(buf, 0, len);
327: pfd.fd = TASK_FD(task);
328: pfd.events = POLLIN | POLLPRI;
329: for (; len > 0; len -= rlen, buf += rlen) {
330: if ((rlen = poll(&pfd, 1, DEF_RPC_TIMEOUT * 1000)) < 1 ||
331: pfd.revents & (POLLERR | POLLHUP | POLLNVAL)) {
332: if (rlen)
333: LOGERR;
334: else
335: rpc_SetErr(ETIMEDOUT, "Timeout reached! Server not respond");
336: schedEvent(TASK_ROOT(task), cbProto[s->srv_proto][CB_CLOSECLIENT],
337: TASK_ARG(task), 0, NULL, 0);
338: return NULL;
339: }
340: rlen = recv(TASK_FD(task), buf, len, 0);
341: if (rlen == -1) {
342: /* close connection */
343: schedEvent(TASK_ROOT(task), cbProto[s->srv_proto][CB_CLOSECLIENT],
344: TASK_ARG(task), 0, NULL, 0);
345: return NULL;
346: }
347: }
348:
349: #if 0
350: /* check integrity of packet */
351: crc = ntohs(rpc->call_crc);
352: rpc->call_crc ^= rpc->call_crc;
353: if (crc != crcFletcher16((u_short*) rpc, len / 2)) {
354: rpc_SetErr(ERPCMISMATCH, "Bad CRC RPC packet");
355: return NULL;
356: }
357: #endif
358:
359: noreply = RPC_CHK_NOREPLY(rpc);
360:
361: /* check RPC packet session info */
362: if (rpc_chkPktSession(&rpc->call_session, &s->srv_session)) {
363: rpc_SetErr(ERPCMISMATCH, "Get invalid RPC session");
364:
365: rpc->call_argc ^= rpc->call_argc;
366: rpc->call_rep.ret = RPC_ERROR(-1);
367: rpc->call_rep.eno = RPC_ERROR(errno);
368: } else {
369: /* execute RPC call */
370: schedEvent(TASK_ROOT(task), execCall, TASK_ARG(task), (int) noreply, rpc, len);
371: }
372:
373: /* send RPC reply */
374: if (!noreply)
375: schedWrite(TASK_ROOT(task), cbProto[s->srv_proto][CB_TXPACKET],
376: TASK_ARG(task), TASK_FD(task), rpc, len);
377:
378: /* lets get next packet */
379: schedReadSelf(task);
380: return NULL;
381: }
382:
383: static void *
384: acceptClients(sched_task_t *task)
385: {
386: rpc_srv_t *srv = TASK_ARG(task);
387: rpc_cli_t *c = NULL;
388: socklen_t salen = sizeof(sockaddr_t);
389: int sock;
390:
391: c = _allocClient(srv, NULL);
392: if (!c) {
393: EVERBOSE(1, "RPC client quota exceeded! Connection will be shutdown!\n");
394: if ((sock = accept(TASK_FD(task), NULL, NULL)) != -1) {
395: shutdown(sock, SHUT_RDWR);
396: close(sock);
397: }
398: goto end;
399: }
400:
401: /* accept client */
402: c->cli_sock = accept(TASK_FD(task), &c->cli_sa.sa, &salen);
403: if (c->cli_sock == -1) {
404: LOGERR;
405: AIT_FREE_VAL(&c->cli_buf);
406: array_Del(srv->srv_clients, c->cli_id, 42);
407: goto end;
408: } else
409: fcntl(c->cli_sock, F_SETFL, fcntl(c->cli_sock, F_GETFL) | O_NONBLOCK);
410:
411: schedRead(TASK_ROOT(task), cbProto[srv->srv_proto][CB_RXPACKET], c,
412: c->cli_sock, NULL, 0);
413: end:
414: schedReadSelf(task);
415: return NULL;
416: }
417:
418:
419: static void *
420: txUDPPacket(sched_task_t *task)
421: {
422: rpc_cli_t *c = TASK_ARG(task);
423: rpc_srv_t *s = c->cli_parent;
424: rpc_func_t *f = NULL;
425: u_char *buf = AIT_GET_BUF(&c->cli_buf);
426: struct tagRPCCall *rpc = (struct tagRPCCall*) buf;
427: int ret, wlen = sizeof(struct tagRPCCall);
428: struct timespec ts = { DEF_RPC_TIMEOUT, 0 };
429:
430: schedCancelby(TASK_ROOT(task), taskTIMER, CRITERIA_DATA, TASK_ARG(task), NULL);
431: schedTimer(TASK_ROOT(task), cbProto[s->srv_proto][CB_CLOSECLIENT],
432: TASK_ARG(task), ts, TASK_ARG(task), 0);
433:
434: if (rpc->call_argc) {
435: f = rpc_srv_getCall(s, ntohs(rpc->call_tag));
436: if (!f) {
437: rpc_SetErr(EPROGUNAVAIL, "Function not found at RPC server");
438: rpc->call_argc ^= rpc->call_argc;
439: rpc->call_rep.ret = RPC_ERROR(-1);
440: rpc->call_rep.eno = RPC_ERROR(rpc_Errno);
441: } else {
442: rpc->call_argc = htons(array_Size(RPC_RETVARS(c)));
443: /* Go Encapsulate variables */
444: ret = ait_vars2buffer(buf + wlen, AIT_LEN(&c->cli_buf) - wlen,
445: RPC_RETVARS(c));
446: /* Free return values */
447: ait_freeVars(&c->cli_vars);
448: if (ret == -1) {
449: rpc_SetErr(EBADRPC, "Prepare RPC packet failed");
450: rpc->call_argc ^= rpc->call_argc;
451: rpc->call_rep.ret = RPC_ERROR(-1);
452: rpc->call_rep.eno = RPC_ERROR(rpc_Errno);
453: } else
454: wlen += ret;
455: }
456: }
457:
458: rpc->call_len = htonl(wlen);
459:
460: /* calculate CRC */
461: rpc->call_crc ^= rpc->call_crc;
462: rpc->call_crc = htons(crcFletcher16((u_short*) buf, wlen / 2));
463:
464: /* send reply */
465: ret = sendto(TASK_FD(task), buf, wlen, MSG_NOSIGNAL,
466: &c->cli_sa.sa, c->cli_sa.sa.sa_len);
467: if (ret == -1 || ret != wlen) {
468: /* close connection */
469: schedEvent(TASK_ROOT(task), cbProto[s->srv_proto][CB_CLOSECLIENT],
470: TASK_ARG(task), 0, NULL, 0);
471: }
472:
473: return NULL;
474: }
475:
476: static void *
477: rxUDPPacket(sched_task_t *task)
478: {
479: rpc_srv_t *srv = TASK_ARG(task);
480: rpc_cli_t *c = NULL;
481: int len, rlen, noreply;
482: u_short crc, off = 0;
483: u_char buf[USHRT_MAX + 1];
484: struct tagRPCCall *rpc = (struct tagRPCCall*) buf;
485: sockaddr_t sa;
486: socklen_t salen;
487: struct timespec ts = { DEF_RPC_TIMEOUT, 0 };
488:
489: /* receive connect packet */
490: salen = sa.ss.ss_len = sizeof(sockaddr_t);
491: rlen = recvfrom(TASK_FD(task), buf, sizeof buf, 0, &sa.sa, &salen);
492: if (rlen < 1)
493: goto end;
494:
495: c = _allocClient(srv, &sa);
496: if (!c)
497: goto end;
498: else {
499: c->cli_sock = TASK_FD(task);
500: memcpy(&c->cli_sa, &sa, sizeof c->cli_sa);
501: memcpy(AIT_GET_BUF(&c->cli_buf), buf, AIT_LEN(&c->cli_buf));
502: /* armed timer for close stateless connection */
503: schedCancelby(TASK_ROOT(task), taskTIMER, CRITERIA_DATA, c, NULL);
504: schedTimer(TASK_ROOT(task), cbProto[srv->srv_proto][CB_CLOSECLIENT],
505: c, ts, c, 0);
506: }
507:
508: do {
509: /* check RPC packet */
510: if (rlen < sizeof(struct tagRPCCall)) {
511: rpc_SetErr(ERPCMISMATCH, "Short RPC packet");
512: break;
513: } else
514: rpc = (struct tagRPCCall*) (AIT_GET_BUF(&c->cli_buf) + off);
515:
516: len = ntohl(rpc->call_len);
517: rlen -= len;
518:
519: /* check RPC packet lengths */
520: if (rlen < 0 || len < sizeof(struct tagRPCCall)) {
521: rpc_SetErr(ERPCMISMATCH, "Broken RPC packet length");
522: /* skip entire packet */
523: break;
524: }
525:
526: /* check integrity of packet */
527: crc = ntohs(rpc->call_crc);
528: rpc->call_crc ^= rpc->call_crc;
529: if (crc != crcFletcher16((u_short*) rpc, len / 2)) {
530: rpc_SetErr(ERPCMISMATCH, "Bad CRC RPC packet");
531:
532: off += len;
533: /* try next packet remaining into buffer */
534: continue;
535: }
536:
537: noreply = RPC_CHK_NOREPLY(rpc);
538:
539: /* check RPC packet session info */
540: if (rpc_chkPktSession(&rpc->call_session, &srv->srv_session)) {
541: rpc_SetErr(ERPCMISMATCH, "Get invalid RPC session");
542:
543: rpc->call_argc ^= rpc->call_argc;
544: rpc->call_rep.ret = RPC_ERROR(-1);
545: rpc->call_rep.eno = RPC_ERROR(errno);
546: } else {
547: /* execute RPC call */
548: schedEvent(TASK_ROOT(task), execCall, c,
549: (int) noreply, rpc, len);
550: }
551:
552: /* send RPC reply */
553: if (!noreply)
554: schedWrite(TASK_ROOT(task), cbProto[srv->srv_proto][CB_TXPACKET],
555: c, TASK_FD(task), rpc, len);
556:
557: off += len;
558: } while (rlen > 0);
559:
560: end:
561: schedReadSelf(task);
562: return NULL;
563: }
564:
565: /* ------------------------------------------------------ */
566:
567: void
568: rpc_freeBLOBCli(rpc_cli_t * __restrict c)
569: {
570: rpc_srv_t *s = c->cli_parent;
571:
572: schedCancelby(s->srv_blob.root, taskMAX, CRITERIA_ARG, c, NULL);
573:
574: /* free buffer */
575: AIT_FREE_VAL(&c->cli_buf);
576:
577: array_Del(s->srv_blob.clients, c->cli_id, 0);
578: if (c)
579: e_free(c);
580: }
581:
582:
583: static void *
584: closeBLOBClient(sched_task_t *task)
585: {
586: int sock = ((rpc_cli_t*) TASK_ARG(task))->cli_sock;
587:
588: rpc_freeBLOBCli(TASK_ARG(task));
589:
590: /* close client socket */
591: shutdown(sock, SHUT_RDWR);
592: close(sock);
593: return NULL;
594: }
595:
596: static void *
597: txBLOB(sched_task_t *task)
598: {
599: rpc_cli_t *c = TASK_ARG(task);
600: u_char *buf = AIT_GET_BUF(&c->cli_buf);
601: int wlen = sizeof(struct tagBLOBHdr);
602:
603: /* send reply */
604: wlen = send(TASK_FD(task), buf, wlen, MSG_NOSIGNAL);
605: if (wlen == -1 || wlen != sizeof(struct tagBLOBHdr)) {
606: /* close blob connection */
607: schedEvent(TASK_ROOT(task), closeBLOBClient, c, 42, NULL, 0);
608: }
609:
610: return NULL;
611: }
612:
613: static void *
614: rxBLOB(sched_task_t *task)
615: {
616: rpc_cli_t *c = TASK_ARG(task);
617: rpc_srv_t *s = c->cli_parent;
618: rpc_blob_t *b;
619: struct tagBLOBHdr blob;
620: int rlen;
621:
622: memset(&blob, 0, sizeof blob);
623: rlen = recv(TASK_FD(task), &blob, sizeof blob, 0);
624: if (rlen < 1) {
625: /* close blob connection */
626: schedEvent(TASK_ROOT(task), closeBLOBClient, c, 42, NULL, 0);
627: return NULL;
628: }
629:
630: /* check BLOB packet */
631: if (rlen < sizeof(struct tagBLOBHdr)) {
632: rpc_SetErr(ERPCMISMATCH, "Short BLOB packet");
633:
634: schedReadSelf(task);
635: return NULL;
636: }
637:
638: /* check RPC packet session info */
639: if (rpc_chkPktSession(&blob.hdr_session, &s->srv_session)) {
640: rpc_SetErr(ERPCMISMATCH, "Get invalid RPC session");
641: blob.hdr_cmd = error;
642: goto end;
643: }
644:
645: /* Go to proceed packet ... */
646: switch (blob.hdr_cmd) {
647: case get:
648: if (!(b = rpc_srv_getBLOB(s, ntohl(blob.hdr_var)))) {
649: rpc_SetErr(EINVAL, "Var=%x not found", ntohl(blob.hdr_var));
650: blob.hdr_cmd = no;
651: blob.hdr_ret = RPC_ERROR(-1);
652: break;
653: } else
654: blob.hdr_len = htonl(b->blob_len);
655:
656: if (rpc_srv_blobMap(s, b) != -1) {
657: /* deliver BLOB variable to client */
658: blob.hdr_ret = htonl(rpc_srv_sendBLOB(c, b));
659: rpc_srv_blobUnmap(b);
660: } else {
661: blob.hdr_cmd = error;
662: blob.hdr_ret = RPC_ERROR(-1);
663: }
664: break;
665: case set:
666: if ((b = rpc_srv_registerBLOB(s, ntohl(blob.hdr_len),
667: ntohl(blob.hdr_ret)))) {
668: /* set new BLOB variable for reply :) */
669: blob.hdr_var = htonl(b->blob_var);
670:
671: /* receive BLOB from client */
672: blob.hdr_ret = htonl(rpc_srv_recvBLOB(c, b));
673: rpc_srv_blobUnmap(b);
674: } else {
675: blob.hdr_cmd = error;
676: blob.hdr_ret = RPC_ERROR(-1);
677: }
678: break;
679: case unset:
680: if (rpc_srv_unregisterBLOB(s, ntohl(blob.hdr_var)) == -1) {
681: blob.hdr_cmd = error;
682: blob.hdr_ret = RPC_ERROR(-1);
683: }
684: break;
685: default:
686: rpc_SetErr(EPROCUNAVAIL, "Unsupported BLOB command %d", blob.hdr_cmd);
687: blob.hdr_cmd = error;
688: blob.hdr_ret = RPC_ERROR(-1);
689: }
690:
691: end:
692: memcpy(AIT_ADDR(&c->cli_buf), &blob, sizeof blob);
693: schedWrite(TASK_ROOT(task), txBLOB, TASK_ARG(task), TASK_FD(task), NULL, 0);
694: schedReadSelf(task);
695: return NULL;
696: }
697:
698: static void *
699: flushBLOB(sched_task_t *task)
700: {
701: rpc_srv_t *srv = TASK_ARG(task);
702: rpc_blob_t *b, *tmp;
703:
704: TAILQ_FOREACH_SAFE(b, &srv->srv_blob.blobs, blob_node, tmp) {
705: TAILQ_REMOVE(&srv->srv_blob.blobs, b, blob_node);
706:
707: rpc_srv_blobFree(srv, b);
708: e_free(b);
709: }
710:
711: schedSignalSelf(task);
712: return NULL;
713: }
714:
715: static void *
716: acceptBLOBClients(sched_task_t *task)
717: {
718: rpc_srv_t *srv = TASK_ARG(task);
719: rpc_cli_t *c = NULL;
720: register int i;
721: socklen_t salen = sizeof(sockaddr_t);
722: int sock;
723: #ifdef TCP_NOPUSH
724: int n = 1;
725: #endif
726:
727: /* check free slots for connect */
728: for (i = 0; i < array_Size(srv->srv_blob.clients) &&
729: (c = array(srv->srv_blob.clients, i, rpc_cli_t*)); i++);
730: if (c) { /* no more free slots! */
731: EVERBOSE(1, "BLOB client quota exceeded! Connection will be shutdown!\n");
732: if ((sock = accept(TASK_FD(task), NULL, NULL)) != -1) {
733: shutdown(sock, SHUT_RDWR);
734: close(sock);
735: }
736: goto end;
737: }
738:
739: c = e_malloc(sizeof(rpc_cli_t));
740: if (!c) {
741: LOGERR;
742: srv->srv_kill = srv->srv_blob.kill = 1;
743: return NULL;
744: } else {
745: memset(c, 0, sizeof(rpc_cli_t));
746: array_Set(srv->srv_blob.clients, i, c);
747: c->cli_id = i;
748: c->cli_parent = srv;
749: }
750:
751: /* alloc empty buffer */
752: AIT_SET_BUFSIZ(&c->cli_buf, 0, srv->srv_netbuf);
753:
754: /* accept client */
755: c->cli_sock = accept(TASK_FD(task), &c->cli_sa.sa, &salen);
756: if (c->cli_sock == -1) {
757: LOGERR;
758: AIT_FREE_VAL(&c->cli_buf);
759: array_Del(srv->srv_blob.clients, i, 42);
760: goto end;
761: } else {
762: #ifdef TCP_NOPUSH
763: setsockopt(c->cli_sock, IPPROTO_TCP, TCP_NOPUSH, &n, sizeof n);
764: #endif
765: fcntl(c->cli_sock, F_SETFL, fcntl(c->cli_sock, F_GETFL) | O_NONBLOCK);
766: }
767:
768: schedRead(TASK_ROOT(task), rxBLOB, c, c->cli_sock, NULL, 0);
769: end:
770: schedReadSelf(task);
771: return NULL;
772: }
773:
774: /* ------------------------------------------------------ */
775:
776: /*
777: * rpc_srv_initBLOBServer() - Init & create BLOB Server
778: *
779: * @srv = RPC server instance
780: * @Port = Port for bind server, if Port == 0 default port is selected
781: * @diskDir = Disk place for BLOB file objects
782: * return: -1 == error or 0 bind and created BLOB server instance
783: */
784: int
785: rpc_srv_initBLOBServer(rpc_srv_t * __restrict srv, u_short Port, const char *diskDir)
786: {
787: int n = 1;
788:
789: if (!srv || srv->srv_kill) {
790: rpc_SetErr(EINVAL, "Invalid parameters can`t init BLOB server");
791: return -1;
792: }
793:
794: memset(&srv->srv_blob, 0, sizeof srv->srv_blob);
795: if (access(diskDir, R_OK | W_OK) == -1) {
796: LOGERR;
797: return -1;
798: } else
799: AIT_SET_STR(&srv->srv_blob.dir, diskDir);
800:
801: /* init blob list */
802: TAILQ_INIT(&srv->srv_blob.blobs);
803:
804: srv->srv_blob.server.cli_parent = srv;
805:
806: memcpy(&srv->srv_blob.server.cli_sa, &srv->srv_server.cli_sa, sizeof(sockaddr_t));
807: switch (srv->srv_blob.server.cli_sa.sa.sa_family) {
808: case AF_INET:
809: srv->srv_blob.server.cli_sa.sin.sin_port =
810: htons(Port ? Port : ntohs(srv->srv_blob.server.cli_sa.sin.sin_port) + 1);
811: break;
812: case AF_INET6:
813: srv->srv_blob.server.cli_sa.sin6.sin6_port =
814: htons(Port ? Port : ntohs(srv->srv_blob.server.cli_sa.sin6.sin6_port) + 1);
815: break;
816: case AF_LOCAL:
817: strlcat(srv->srv_blob.server.cli_sa.sun.sun_path, ".blob",
818: sizeof srv->srv_blob.server.cli_sa.sun.sun_path);
819: break;
820: default:
821: AIT_FREE_VAL(&srv->srv_blob.dir);
822: return -1;
823: }
824:
825: /* create BLOB server socket */
826: srv->srv_blob.server.cli_sock = socket(srv->srv_server.cli_sa.sa.sa_family, SOCK_STREAM, 0);
827: if (srv->srv_blob.server.cli_sock == -1) {
828: LOGERR;
829: AIT_FREE_VAL(&srv->srv_blob.dir);
830: return -1;
831: }
832: if (setsockopt(srv->srv_blob.server.cli_sock, SOL_SOCKET, SO_REUSEADDR, &n, sizeof n) == -1) {
833: LOGERR;
834: close(srv->srv_blob.server.cli_sock);
835: AIT_FREE_VAL(&srv->srv_blob.dir);
836: return -1;
837: }
838: n = srv->srv_netbuf;
839: if (setsockopt(srv->srv_blob.server.cli_sock, SOL_SOCKET, SO_SNDBUF, &n, sizeof n) == -1) {
840: LOGERR;
841: close(srv->srv_blob.server.cli_sock);
842: AIT_FREE_VAL(&srv->srv_blob.dir);
843: return -1;
844: }
845: if (setsockopt(srv->srv_blob.server.cli_sock, SOL_SOCKET, SO_RCVBUF, &n, sizeof n) == -1) {
846: LOGERR;
847: close(srv->srv_blob.server.cli_sock);
848: AIT_FREE_VAL(&srv->srv_blob.dir);
849: return -1;
850: }
851: if (bind(srv->srv_blob.server.cli_sock, &srv->srv_blob.server.cli_sa.sa,
852: srv->srv_blob.server.cli_sa.sa.sa_len) == -1) {
853: LOGERR;
854: close(srv->srv_blob.server.cli_sock);
855: AIT_FREE_VAL(&srv->srv_blob.dir);
856: return -1;
857: } else
858: fcntl(srv->srv_blob.server.cli_sock, F_SETFL,
859: fcntl(srv->srv_blob.server.cli_sock, F_GETFL) | O_NONBLOCK);
860:
861:
862: /* allocate pool for concurent blob clients */
863: srv->srv_blob.clients = array_Init(array_Size(srv->srv_clients));
864: if (!srv->srv_blob.clients) {
865: rpc_SetErr(elwix_GetErrno(), "%s", elwix_GetError());
866: close(srv->srv_blob.server.cli_sock);
867: AIT_FREE_VAL(&srv->srv_blob.dir);
868: return -1;
869: }
870:
871: /* init blob scheduler */
872: srv->srv_blob.root = schedBegin();
873: if (!srv->srv_blob.root) {
874: rpc_SetErr(sched_GetErrno(), "%s", sched_GetError());
875: array_Destroy(&srv->srv_blob.clients);
876: close(srv->srv_blob.server.cli_sock);
877: AIT_FREE_VAL(&srv->srv_blob.dir);
878: return -1;
879: }
880:
881: return 0;
882: }
883:
884: /*
885: * rpc_srv_endBLOBServer() - Destroy BLOB server, close all opened sockets and free resources
886: *
887: * @srv = RPC Server instance
888: * return: none
889: */
890: void
891: rpc_srv_endBLOBServer(rpc_srv_t * __restrict srv)
892: {
893: if (!srv)
894: return;
895:
896: srv->srv_blob.kill = 1;
897:
898: schedEnd(&srv->srv_blob.root);
899: }
900:
901: /*
902: * rpc_srv_loopBLOBServer() - Execute Main BLOB server loop and wait for clients requests
903: *
904: * @srv = RPC Server instance
905: * return: -1 error or 0 ok, infinite loop ...
906: */
907: int
908: rpc_srv_loopBLOBServer(rpc_srv_t * __restrict srv)
909: {
910: rpc_cli_t *c;
911: register int i;
912: rpc_blob_t *b, *tmp;
913: struct timespec ts = { RPC_SCHED_POLLING, 0 };
914:
915: if (!srv || srv->srv_kill) {
916: rpc_SetErr(EINVAL, "Invalid parameter can`t start BLOB server");
917: return -1;
918: }
919:
920: if (listen(srv->srv_blob.server.cli_sock, array_Size(srv->srv_blob.clients)) == -1) {
921: LOGERR;
922: return -1;
923: }
924:
925: schedSignal(srv->srv_blob.root, flushBLOB, srv, SIGFBLOB, NULL, 0);
926: if (!schedRead(srv->srv_blob.root, acceptBLOBClients, srv,
927: srv->srv_blob.server.cli_sock, NULL, 0)) {
928: rpc_SetErr(sched_GetErrno(), "%s", sched_GetError());
929: return -1;
930: }
931:
932: schedPolling(srv->srv_blob.root, &ts, NULL);
933: /* main rpc loop */
934: schedRun(srv->srv_blob.root, &srv->srv_blob.kill);
935:
936: /* detach blobs */
937: TAILQ_FOREACH_SAFE(b, &srv->srv_blob.blobs, blob_node, tmp) {
938: TAILQ_REMOVE(&srv->srv_blob.blobs, b, blob_node);
939:
940: rpc_srv_blobFree(srv, b);
941: e_free(b);
942: }
943:
944: /* close all clients connections & server socket */
945: for (i = 0; i < array_Size(srv->srv_blob.clients); i++) {
946: c = array(srv->srv_blob.clients, i, rpc_cli_t*);
947: if (c) {
948: shutdown(c->cli_sock, SHUT_RDWR);
949: close(c->cli_sock);
950:
951: schedCancelby(srv->srv_blob.root, taskMAX, CRITERIA_ARG, c, NULL);
952: AIT_FREE_VAL(&c->cli_buf);
953: }
954: array_Del(srv->srv_blob.clients, i, 42);
955: }
956: array_Destroy(&srv->srv_blob.clients);
957:
958: close(srv->srv_blob.server.cli_sock);
959:
960: AIT_FREE_VAL(&srv->srv_blob.dir);
961: return 0;
962: }
963:
964:
965: /*
966: * rpc_srv_initServer() - Init & create RPC Server
967: *
968: * @InstID = Instance for authentication & recognition
969: * @concurentClients = Concurent clients at same time to this server
970: * @netBuf = Network buffer length (min:512 bytes), if =0 == BUFSIZ (also meaning max RPC packet)
971: * @csHost = Host name or address for bind server, if NULL any address
972: * @Port = Port for bind server, if Port == 0 default port is selected
973: * @proto = Protocol, if == 0 choose SOCK_STREAM
974: * return: NULL == error or !=NULL bind and created RPC server instance
975: */
976: rpc_srv_t *
977: rpc_srv_initServer(u_char InstID, int concurentClients, int netBuf,
978: const char *csHost, u_short Port, int proto)
979: {
980: int n = 1;
981: rpc_srv_t *srv = NULL;
982: sockaddr_t sa = E_SOCKADDR_INIT;
983:
984: if (!concurentClients || (proto < 0 || proto > SOCK_DGRAM)) {
985: rpc_SetErr(EINVAL, "Invalid parameters can`t init RPC server");
986: return NULL;
987: }
988: if (!e_gethostbyname(csHost, Port, &sa))
989: return NULL;
990: if (!Port)
991: Port = RPC_DEFPORT;
992: if (!proto)
993: proto = SOCK_STREAM;
994: if (netBuf < RPC_MIN_BUFSIZ)
995: netBuf = BUFSIZ;
996: else
997: netBuf = E_ALIGN(netBuf, 2); /* align netBuf length */
998:
999: #ifdef HAVE_SRANDOMDEV
1000: srandomdev();
1001: #else
1002: time_t tim;
1003:
1004: srandom((time(&tim) ^ getpid()));
1005: #endif
1006:
1007: srv = e_malloc(sizeof(rpc_srv_t));
1008: if (!srv) {
1009: LOGERR;
1010: return NULL;
1011: } else
1012: memset(srv, 0, sizeof(rpc_srv_t));
1013:
1014: srv->srv_proto = proto;
1015: srv->srv_netbuf = netBuf;
1016: srv->srv_session.sess_version = RPC_VERSION;
1017: srv->srv_session.sess_instance = InstID;
1018:
1019: srv->srv_server.cli_parent = srv;
1020: memcpy(&srv->srv_server.cli_sa, &sa, sizeof srv->srv_server.cli_sa);
1021:
1022: /* init functions */
1023: pthread_mutex_init(&srv->srv_funcs.mtx, NULL);
1024: SLIST_INIT(&srv->srv_funcs);
1025: AVL_INIT(&srv->srv_funcs);
1026:
1027: /* init scheduler */
1028: srv->srv_root = schedBegin();
1029: if (!srv->srv_root) {
1030: rpc_SetErr(sched_GetErrno(), "%s", sched_GetError());
1031: pthread_mutex_destroy(&srv->srv_funcs.mtx);
1032: e_free(srv);
1033: return NULL;
1034: }
1035:
1036: /* init pool for clients */
1037: srv->srv_clients = array_Init(concurentClients);
1038: if (!srv->srv_clients) {
1039: rpc_SetErr(elwix_GetErrno(), "%s", elwix_GetError());
1040: schedEnd(&srv->srv_root);
1041: pthread_mutex_destroy(&srv->srv_funcs.mtx);
1042: e_free(srv);
1043: return NULL;
1044: }
1045:
1046: /* create server socket */
1047: srv->srv_server.cli_sock = socket(srv->srv_server.cli_sa.sa.sa_family, srv->srv_proto, 0);
1048: if (srv->srv_server.cli_sock == -1) {
1049: LOGERR;
1050: array_Destroy(&srv->srv_clients);
1051: schedEnd(&srv->srv_root);
1052: pthread_mutex_destroy(&srv->srv_funcs.mtx);
1053: e_free(srv);
1054: return NULL;
1055: }
1056: if (setsockopt(srv->srv_server.cli_sock, SOL_SOCKET, SO_REUSEADDR, &n, sizeof n) == -1) {
1057: LOGERR;
1058: goto err;
1059: }
1060: n = srv->srv_netbuf;
1061: if (setsockopt(srv->srv_server.cli_sock, SOL_SOCKET, SO_SNDBUF, &n, sizeof n) == -1) {
1062: LOGERR;
1063: goto err;
1064: }
1065: if (setsockopt(srv->srv_server.cli_sock, SOL_SOCKET, SO_RCVBUF, &n, sizeof n) == -1) {
1066: LOGERR;
1067: goto err;
1068: }
1069: if (bind(srv->srv_server.cli_sock, &srv->srv_server.cli_sa.sa,
1070: srv->srv_server.cli_sa.sa.sa_len) == -1) {
1071: LOGERR;
1072: goto err;
1073: } else
1074: fcntl(srv->srv_server.cli_sock, F_SETFL,
1075: fcntl(srv->srv_server.cli_sock, F_GETFL) | O_NONBLOCK);
1076:
1077: rpc_register_srvPing(srv);
1078:
1079: return srv;
1080: err: /* error condition */
1081: close(srv->srv_server.cli_sock);
1082: array_Destroy(&srv->srv_clients);
1083: schedEnd(&srv->srv_root);
1084: pthread_mutex_destroy(&srv->srv_funcs.mtx);
1085: e_free(srv);
1086: return NULL;
1087: }
1088:
1089: /*
1090: * rpc_srv_endServer() - Destroy RPC server, close all opened sockets and free resources
1091: *
1092: * @psrv = RPC Server instance
1093: * return: none
1094: */
1095: void
1096: rpc_srv_endServer(rpc_srv_t ** __restrict psrv)
1097: {
1098: if (!psrv || !*psrv)
1099: return;
1100:
1101: /* if send kill to blob server */
1102: rpc_srv_endBLOBServer(*psrv);
1103:
1104: (*psrv)->srv_kill = 1;
1105: sleep(RPC_SCHED_POLLING);
1106:
1107: schedEnd(&(*psrv)->srv_root);
1108:
1109: pthread_mutex_destroy(&(*psrv)->srv_funcs.mtx);
1110: e_free(*psrv);
1111: *psrv = NULL;
1112: }
1113:
1114: /*
1115: * rpc_srv_loopServer() - Execute Main server loop and wait for clients requests
1116: *
1117: * @srv = RPC Server instance
1118: * return: -1 error or 0 ok, infinite loop ...
1119: */
1120: int
1121: rpc_srv_loopServer(rpc_srv_t * __restrict srv)
1122: {
1123: rpc_cli_t *c;
1124: register int i;
1125: rpc_func_t *f;
1126: struct timespec ts = { RPC_SCHED_POLLING, 0 };
1127:
1128: if (!srv) {
1129: rpc_SetErr(EINVAL, "Invalid parameter can`t start RPC server");
1130: return -1;
1131: }
1132:
1133: if (srv->srv_proto == SOCK_STREAM)
1134: if (listen(srv->srv_server.cli_sock, array_Size(srv->srv_clients)) == -1) {
1135: LOGERR;
1136: return -1;
1137: }
1138:
1139: if (!schedRead(srv->srv_root, cbProto[srv->srv_proto][CB_ACCEPTCLIENT], srv,
1140: srv->srv_server.cli_sock, NULL, 0)) {
1141: rpc_SetErr(sched_GetErrno(), "%s", sched_GetError());
1142: return -1;
1143: }
1144:
1145: schedPolling(srv->srv_root, &ts, NULL);
1146: /* main rpc loop */
1147: schedRun(srv->srv_root, &srv->srv_kill);
1148:
1149: /* close all clients connections & server socket */
1150: for (i = 0; i < array_Size(srv->srv_clients); i++) {
1151: c = array(srv->srv_clients, i, rpc_cli_t*);
1152: if (c) {
1153: shutdown(c->cli_sock, SHUT_RDWR);
1154: close(c->cli_sock);
1155:
1156: schedCancelby(srv->srv_root, taskMAX, CRITERIA_ARG, c, NULL);
1157: ait_freeVars(&RPC_RETVARS(c));
1158: AIT_FREE_VAL(&c->cli_buf);
1159: }
1160: array_Del(srv->srv_clients, i, 42);
1161: }
1162: array_Destroy(&srv->srv_clients);
1163:
1164: close(srv->srv_server.cli_sock);
1165:
1166: /* detach exported calls */
1167: RPC_FUNCS_LOCK(&srv->srv_funcs);
1168: while ((f = SLIST_FIRST(&srv->srv_funcs))) {
1169: SLIST_REMOVE_HEAD(&srv->srv_funcs, func_next);
1170:
1171: AIT_FREE_VAL(&f->func_name);
1172: e_free(f);
1173: }
1174: srv->srv_funcs.avlh_root = NULL;
1175: RPC_FUNCS_UNLOCK(&srv->srv_funcs);
1176:
1177: return 0;
1178: }
1179:
1180:
1181: /*
1182: * rpc_srv_execCall() Execute registered call from RPC server
1183: *
1184: * @cli = RPC client
1185: * @rpc = IN RPC call structure
1186: * @funcname = Execute RPC function
1187: * @args = IN RPC calling arguments from RPC client
1188: * return: -1 error, !=-1 ok
1189: */
1190: int
1191: rpc_srv_execCall(rpc_cli_t * __restrict cli, struct tagRPCCall * __restrict rpc,
1192: ait_val_t funcname, array_t * __restrict args)
1193: {
1194: rpc_callback_t func;
1195:
1196: if (!cli || !rpc || !AIT_ADDR(&funcname)) {
1197: rpc_SetErr(EINVAL, "Invalid parameter can`t exec function");
1198: return -1;
1199: }
1200:
1201: func = AIT_GET_LIKE(&funcname, rpc_callback_t);
1202: return func(cli, rpc, args);
1203: }
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