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 1.15 2013/04/02 15:50:14 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: inline 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[USHRT_MAX] = { 0 };
165: struct tagRPCCall *rpc = (struct tagRPCCall*) buf;
166: int ret, wlen = sizeof(struct tagRPCCall);
167:
168: /* copy RPC header */
169: memcpy(buf, TASK_DATA(task), wlen);
170:
171: if (rpc->call_argc) {
172: f = rpc_srv_getCall(s, ntohs(rpc->call_tag));
173: if (!f) {
174: rpc_SetErr(EPROGUNAVAIL, "Function not found at RPC server");
175: rpc->call_argc ^= rpc->call_argc;
176: rpc->call_rep.ret = RPC_ERROR(-1);
177: rpc->call_rep.eno = RPC_ERROR(rpc_Errno);
178: } else {
179: rpc->call_argc = htons(array_Size(RPC_RETVARS(c)));
180: /* Go Encapsulate variables */
181: ret = ait_vars2buffer(buf + wlen, sizeof buf - wlen, RPC_RETVARS(c));
182: /* Free return values */
183: ait_freeVars(&c->cli_vars);
184: if (ret == -1) {
185: rpc_SetErr(EBADRPC, "Prepare RPC packet failed");
186: rpc->call_argc ^= rpc->call_argc;
187: rpc->call_rep.ret = RPC_ERROR(-1);
188: rpc->call_rep.eno = RPC_ERROR(rpc_Errno);
189: } else
190: wlen += ret;
191: }
192: }
193:
194: rpc->call_len = htons(wlen);
195:
196: #if 0
197: /* calculate CRC */
198: rpc->call_crc ^= rpc->call_crc;
199: rpc->call_crc = htons(crcFletcher16((u_short*) buf, wlen / 2));
200: #endif
201:
202: /* send reply */
203: ret = send(TASK_FD(task), buf, wlen, MSG_NOSIGNAL);
204: if (ret == -1 || ret != wlen) {
205: /* close connection */
206: schedEvent(TASK_ROOT(task), cbProto[s->srv_proto][CB_CLOSECLIENT],
207: TASK_ARG(task), 0, NULL, 0);
208: }
209:
210: return NULL;
211: }
212:
213: static void *
214: execCall(sched_task_t *task)
215: {
216: rpc_cli_t *c = TASK_ARG(task);
217: rpc_srv_t *s = c->cli_parent;
218: rpc_func_t *f = NULL;
219: array_t *arr = NULL;
220: u_char *buf = AIT_GET_BUF(&c->cli_buf) + TASK_VAL(task);
221: struct tagRPCCall *rpc = (struct tagRPCCall*) buf;
222: int argc = ntohs(rpc->call_argc);
223:
224: /* Go decapsulate variables ... */
225: if (argc) {
226: arr = ait_buffer2vars(buf + sizeof(struct tagRPCCall),
227: AIT_LEN(&c->cli_buf) - TASK_VAL(task) - sizeof(struct tagRPCCall),
228: argc, 42);
229: if (!arr) {
230: rpc_SetErr(ERPCMISMATCH, "#%d - %s", elwix_GetErrno(), elwix_GetError());
231: rpc->call_argc ^= rpc->call_argc;
232: rpc->call_rep.ret = RPC_ERROR(-1);
233: rpc->call_rep.eno = RPC_ERROR(rpc_Errno);
234: return NULL;
235: }
236: } else
237: arr = NULL;
238:
239: if (!(f = rpc_srv_getCall(s, ntohs(rpc->call_tag)))) {
240: rpc_SetErr(EPROGUNAVAIL, "Function not found at RPC server");
241: rpc->call_argc ^= rpc->call_argc;
242: rpc->call_rep.ret = RPC_ERROR(-1);
243: rpc->call_rep.eno = RPC_ERROR(rpc_Errno);
244: } else {
245: /* if client doesn't want reply */
246: argc = RPC_CHK_NOREPLY(rpc);
247: rpc->call_rep.ret = RPC_ERROR(rpc_srv_execCall(c, rpc, f->func_name, arr));
248: if (rpc->call_rep.ret == htonl(-1)) {
249: rpc->call_rep.eno = RPC_ERROR(errno);
250: rpc->call_argc ^= rpc->call_argc;
251: } else {
252: rpc->call_rep.eno ^= rpc->call_rep.eno;
253: if (argc) {
254: /* without reply */
255: ait_freeVars(&c->cli_vars);
256: rpc->call_argc ^= rpc->call_argc;
257: } else {
258: /* reply */
259: rpc->call_argc = htons(array_Size(RPC_RETVARS(c)));
260: }
261: }
262: }
263:
264: array_Destroy(&arr);
265: return NULL;
266: }
267:
268: static void *
269: rxPacket(sched_task_t *task)
270: {
271: rpc_cli_t *c = TASK_ARG(task);
272: rpc_srv_t *s = c->cli_parent;
273: int len, rlen, noreply;
274: u_short off = TASK_DATLEN(task);
275: #if 0
276: u_short crc;
277: #endif
278: u_char *buf = AIT_GET_BUF(&c->cli_buf);
279: struct tagRPCCall *rpc;
280:
281: if (!off)
282: memset(buf, 0, AIT_LEN(&c->cli_buf));
283: rlen = recv(TASK_FD(task), buf + off, AIT_LEN(&c->cli_buf) - off, 0);
284: if (rlen < 1) {
285: /* close connection */
286: schedEvent(TASK_ROOT(task), cbProto[s->srv_proto][CB_CLOSECLIENT],
287: TASK_ARG(task), 0, NULL, 0);
288: return NULL;
289: } else {
290: rlen += off; /* add reminded bytes from previous rxPacket, if exists! */
291: off = 0; /* process buffer from start offset == 0 */
292: }
293:
294: do {
295: /* check RPC packet */
296: if (rlen < sizeof(struct tagRPCCall)) {
297: rpc_SetErr(ERPCMISMATCH, "Short RPC packet");
298:
299: /* reminder received previous bytes ;) */
300: schedRead(TASK_ROOT(task), TASK_FUNC(task), TASK_ARG(task),
301: TASK_FD(task), TASK_DATA(task), rlen);
302: return NULL;
303: } else
304: rpc = (struct tagRPCCall*) (buf + off);
305:
306: len = ntohs(rpc->call_len);
307: rlen -= len;
308:
309: /* check RPC packet lengths */
310: if (rlen < 0 || len < sizeof(struct tagRPCCall)) {
311: rpc_SetErr(ERPCMISMATCH, "Broken RPC packet length");
312: /* skip entire packet */
313: break;
314: }
315:
316: #if 0
317: /* check integrity of packet */
318: crc = ntohs(rpc->call_crc);
319: rpc->call_crc ^= rpc->call_crc;
320: if (crc != crcFletcher16((u_short*) rpc, len / 2)) {
321: rpc_SetErr(ERPCMISMATCH, "Bad CRC RPC packet");
322:
323: off += len;
324: /* try next packet remaining into buffer */
325: continue;
326: }
327: #endif
328:
329: noreply = RPC_CHK_NOREPLY(rpc);
330:
331: /* check RPC packet session info */
332: if (rpc_chkPktSession(&rpc->call_session, &s->srv_session)) {
333: rpc_SetErr(ERPCMISMATCH, "Get invalid RPC session");
334: rpc->call_argc ^= rpc->call_argc;
335: rpc->call_rep.ret = RPC_ERROR(-1);
336: rpc->call_rep.eno = RPC_ERROR(errno);
337: } else {
338: /* execute RPC call */
339: schedEvent(TASK_ROOT(task), execCall, TASK_ARG(task), off, NULL, 0);
340: }
341:
342: /* send RPC reply */
343: if (!noreply)
344: schedWrite(TASK_ROOT(task), cbProto[s->srv_proto][CB_TXPACKET],
345: TASK_ARG(task), TASK_FD(task), rpc, len);
346:
347: off += len;
348: } while (rlen > 0);
349:
350: /* lets get next packet */
351: schedRead(TASK_ROOT(task), TASK_FUNC(task), TASK_ARG(task), TASK_FD(task), TASK_DATA(task), 0);
352: return NULL;
353: }
354:
355: static void *
356: acceptClients(sched_task_t *task)
357: {
358: rpc_srv_t *srv = TASK_ARG(task);
359: rpc_cli_t *c = NULL;
360: socklen_t salen = sizeof(sockaddr_t);
361:
362: c = _allocClient(srv, NULL);
363: if (!c)
364: goto end;
365:
366: /* accept client */
367: c->cli_sock = accept(TASK_FD(task), &c->cli_sa.sa, &salen);
368: if (c->cli_sock == -1) {
369: LOGERR;
370: AIT_FREE_VAL(&c->cli_buf);
371: array_Del(srv->srv_clients, c->cli_id, 42);
372: goto end;
373: } else
374: fcntl(c->cli_sock, F_SETFL, fcntl(c->cli_sock, F_GETFL) | O_NONBLOCK);
375:
376: schedRead(TASK_ROOT(task), cbProto[srv->srv_proto][CB_RXPACKET], c,
377: c->cli_sock, NULL, 0);
378: end:
379: schedReadSelf(task);
380: return NULL;
381: }
382:
383:
384: static void *
385: txUDPPacket(sched_task_t *task)
386: {
387: rpc_cli_t *c = TASK_ARG(task);
388: rpc_srv_t *s = c->cli_parent;
389: rpc_func_t *f = NULL;
390: u_char buf[USHRT_MAX] = { 0 };
391: struct tagRPCCall *rpc = (struct tagRPCCall*) buf;
392: int ret, wlen = sizeof(struct tagRPCCall);
393: struct timespec ts = { DEF_RPC_TIMEOUT, 0 };
394:
395: schedCancelby(TASK_ROOT(task), taskTIMER, CRITERIA_DATA, TASK_ARG(task), NULL);
396: schedTimer(TASK_ROOT(task), cbProto[s->srv_proto][CB_CLOSECLIENT],
397: TASK_ARG(task), ts, TASK_ARG(task), 0);
398:
399: /* copy RPC header */
400: memcpy(buf, TASK_DATA(task), wlen);
401:
402: if (rpc->call_argc) {
403: f = rpc_srv_getCall(s, ntohs(rpc->call_tag));
404: if (!f) {
405: rpc_SetErr(EPROGUNAVAIL, "Function not found at RPC server");
406: rpc->call_argc ^= rpc->call_argc;
407: rpc->call_rep.ret = RPC_ERROR(-1);
408: rpc->call_rep.eno = RPC_ERROR(rpc_Errno);
409: } else {
410: rpc->call_argc = htons(array_Size(RPC_RETVARS(c)));
411: /* Go Encapsulate variables */
412: ret = ait_vars2buffer(buf + wlen, sizeof buf - wlen, RPC_RETVARS(c));
413: /* Free return values */
414: ait_freeVars(&c->cli_vars);
415: if (ret == -1) {
416: rpc_SetErr(EBADRPC, "Prepare RPC packet failed");
417: rpc->call_argc ^= rpc->call_argc;
418: rpc->call_rep.ret = RPC_ERROR(-1);
419: rpc->call_rep.eno = RPC_ERROR(rpc_Errno);
420: } else
421: wlen += ret;
422: }
423: }
424:
425: rpc->call_len = htons(wlen);
426:
427: /* calculate CRC */
428: rpc->call_crc ^= rpc->call_crc;
429: rpc->call_crc = htons(crcFletcher16((u_short*) buf, wlen / 2));
430:
431: /* send reply */
432: ret = sendto(TASK_FD(task), buf, wlen, MSG_NOSIGNAL,
433: &c->cli_sa.sa, c->cli_sa.sa.sa_len);
434: if (ret == -1 || ret != wlen) {
435: /* close connection */
436: schedEvent(TASK_ROOT(task), cbProto[s->srv_proto][CB_CLOSECLIENT],
437: TASK_ARG(task), 0, NULL, 0);
438: }
439:
440: return NULL;
441: }
442:
443: static void *
444: rxUDPPacket(sched_task_t *task)
445: {
446: rpc_srv_t *srv = TASK_ARG(task);
447: rpc_cli_t *c = NULL;
448: int len, rlen, noreply;
449: u_short crc, off = 0;
450: u_char buf[USHRT_MAX + 1];
451: struct tagRPCCall *rpc = (struct tagRPCCall*) buf;
452: sockaddr_t sa;
453: socklen_t salen;
454: struct timespec ts = { DEF_RPC_TIMEOUT, 0 };
455:
456: /* receive connect packet */
457: salen = sa.ss.ss_len = sizeof(sockaddr_t);
458: rlen = recvfrom(TASK_FD(task), buf, sizeof buf, 0, &sa.sa, &salen);
459: if (rlen < 1)
460: goto end;
461:
462: c = _allocClient(srv, &sa);
463: if (!c)
464: goto end;
465: else {
466: c->cli_sock = TASK_FD(task);
467: memcpy(&c->cli_sa, &sa, sizeof c->cli_sa);
468: memcpy(AIT_GET_BUF(&c->cli_buf), buf, AIT_LEN(&c->cli_buf));
469: /* armed timer for close stateless connection */
470: schedCancelby(TASK_ROOT(task), taskTIMER, CRITERIA_DATA, c, NULL);
471: schedTimer(TASK_ROOT(task), cbProto[srv->srv_proto][CB_CLOSECLIENT],
472: c, ts, c, 0);
473: }
474:
475: do {
476: /* check RPC packet */
477: if (rlen < sizeof(struct tagRPCCall)) {
478: rpc_SetErr(ERPCMISMATCH, "Short RPC packet");
479: break;
480: } else
481: rpc = (struct tagRPCCall*) (AIT_GET_BUF(&c->cli_buf) + off);
482:
483: len = ntohs(rpc->call_len);
484: rlen -= len;
485:
486: /* check RPC packet lengths */
487: if (rlen < 0 || len < sizeof(struct tagRPCCall)) {
488: rpc_SetErr(ERPCMISMATCH, "Broken RPC packet length");
489: /* skip entire packet */
490: break;
491: }
492:
493: /* check integrity of packet */
494: crc = ntohs(rpc->call_crc);
495: rpc->call_crc ^= rpc->call_crc;
496: if (crc != crcFletcher16((u_short*) rpc, len / 2)) {
497: rpc_SetErr(ERPCMISMATCH, "Bad CRC RPC packet");
498:
499: off += len;
500: /* try next packet remaining into buffer */
501: continue;
502: }
503:
504: noreply = RPC_CHK_NOREPLY(rpc);
505:
506: /* check RPC packet session info */
507: if (rpc_chkPktSession(&rpc->call_session, &srv->srv_session)) {
508: rpc_SetErr(ERPCMISMATCH, "Get invalid RPC session");
509: rpc->call_argc ^= rpc->call_argc;
510: rpc->call_rep.ret = RPC_ERROR(-1);
511: rpc->call_rep.eno = RPC_ERROR(errno);
512: } else {
513: /* execute RPC call */
514: schedEvent(TASK_ROOT(task), execCall, c, off, NULL, 0);
515: }
516:
517: /* send RPC reply */
518: if (!noreply)
519: schedWrite(TASK_ROOT(task), cbProto[srv->srv_proto][CB_TXPACKET],
520: c, TASK_FD(task), rpc, len);
521:
522: off += len;
523: } while (rlen > 0);
524:
525: end:
526: schedReadSelf(task);
527: return NULL;
528: }
529:
530: /* ------------------------------------------------------ */
531:
532: inline void
533: rpc_freeBLOBCli(rpc_cli_t * __restrict c)
534: {
535: rpc_srv_t *s = c->cli_parent;
536:
537: schedCancelby(s->srv_blob.root, taskMAX, CRITERIA_ARG, c, NULL);
538:
539: /* free buffer */
540: AIT_FREE_VAL(&c->cli_buf);
541:
542: array_Del(s->srv_blob.clients, c->cli_id, 0);
543: if (c)
544: e_free(c);
545: }
546:
547:
548: static void *
549: closeBLOBClient(sched_task_t *task)
550: {
551: int sock = ((rpc_cli_t*) TASK_ARG(task))->cli_sock;
552:
553: rpc_freeBLOBCli(TASK_ARG(task));
554:
555: /* close client socket */
556: shutdown(sock, SHUT_RDWR);
557: close(sock);
558: return NULL;
559: }
560:
561: static void *
562: txBLOB(sched_task_t *task)
563: {
564: rpc_cli_t *c = TASK_ARG(task);
565: u_char *buf = AIT_GET_BUF(&c->cli_buf);
566: int wlen = sizeof(struct tagBLOBHdr);
567:
568: /* send reply */
569: wlen = send(TASK_FD(task), buf, wlen, MSG_NOSIGNAL);
570: if (wlen == -1 || wlen != sizeof(struct tagBLOBHdr)) {
571: /* close blob connection */
572: schedEvent(TASK_ROOT(task), closeBLOBClient, c, 42, NULL, 0);
573: }
574:
575: return NULL;
576: }
577:
578: static void *
579: rxBLOB(sched_task_t *task)
580: {
581: rpc_cli_t *c = TASK_ARG(task);
582: rpc_srv_t *s = c->cli_parent;
583: rpc_blob_t *b;
584: struct tagBLOBHdr blob;
585: int rlen;
586:
587: memset(&blob, 0, sizeof blob);
588: rlen = recv(TASK_FD(task), &blob, sizeof blob, 0);
589: if (rlen < 1) {
590: /* close blob connection */
591: schedEvent(TASK_ROOT(task), closeBLOBClient, c, 42, NULL, 0);
592: return NULL;
593: }
594:
595: /* check BLOB packet */
596: if (rlen < sizeof(struct tagBLOBHdr)) {
597: rpc_SetErr(ERPCMISMATCH, "Short BLOB packet");
598:
599: schedReadSelf(task);
600: return NULL;
601: }
602:
603: /* check RPC packet session info */
604: if (rpc_chkPktSession(&blob.hdr_session, &s->srv_session)) {
605: rpc_SetErr(ERPCMISMATCH, "Get invalid RPC session");
606: blob.hdr_cmd = error;
607: goto end;
608: }
609:
610: /* Go to proceed packet ... */
611: switch (blob.hdr_cmd) {
612: case get:
613: if (!(b = rpc_srv_getBLOB(s, ntohl(blob.hdr_var)))) {
614: rpc_SetErr(EINVAL, "Var=%x not found", ntohl(blob.hdr_var));
615: blob.hdr_cmd = no;
616: blob.hdr_ret = RPC_ERROR(-1);
617: break;
618: } else
619: blob.hdr_len = htonl(b->blob_len);
620:
621: if (rpc_srv_blobMap(s, b) != -1) {
622: /* deliver BLOB variable to client */
623: blob.hdr_ret = htonl(rpc_srv_sendBLOB(c, b));
624: rpc_srv_blobUnmap(b);
625: } else {
626: blob.hdr_cmd = error;
627: blob.hdr_ret = RPC_ERROR(-1);
628: }
629: break;
630: case set:
631: if ((b = rpc_srv_registerBLOB(s, ntohl(blob.hdr_len)))) {
632: /* set new BLOB variable for reply :) */
633: blob.hdr_var = htonl(b->blob_var);
634:
635: /* receive BLOB from client */
636: blob.hdr_ret = htonl(rpc_srv_recvBLOB(c, b));
637: rpc_srv_blobUnmap(b);
638: } else {
639: blob.hdr_cmd = error;
640: blob.hdr_ret = RPC_ERROR(-1);
641: }
642: break;
643: case unset:
644: if (rpc_srv_unregisterBLOB(s, ntohl(blob.hdr_var)) == -1) {
645: blob.hdr_cmd = error;
646: blob.hdr_ret = RPC_ERROR(-1);
647: }
648: break;
649: default:
650: rpc_SetErr(EPROCUNAVAIL, "Unsupported BLOB command %d", blob.hdr_cmd);
651: blob.hdr_cmd = error;
652: blob.hdr_ret = RPC_ERROR(-1);
653: }
654:
655: end:
656: memcpy(AIT_ADDR(&c->cli_buf), &blob, sizeof blob);
657: schedWrite(TASK_ROOT(task), txBLOB, TASK_ARG(task), TASK_FD(task), NULL, 0);
658: schedReadSelf(task);
659: return NULL;
660: }
661:
662: static void *
663: acceptBLOBClients(sched_task_t *task)
664: {
665: rpc_srv_t *srv = TASK_ARG(task);
666: rpc_cli_t *c = NULL;
667: register int i;
668: socklen_t salen = sizeof(sockaddr_t);
669: #ifdef TCP_NOPUSH
670: int n = 1;
671: #endif
672:
673: /* check free slots for connect */
674: for (i = 0; i < array_Size(srv->srv_blob.clients) &&
675: (c = array(srv->srv_blob.clients, i, rpc_cli_t*)); i++);
676: if (c) /* no more free slots! */
677: goto end;
678: c = e_malloc(sizeof(rpc_cli_t));
679: if (!c) {
680: LOGERR;
681: srv->srv_kill = srv->srv_blob.kill = 1;
682: return NULL;
683: } else {
684: memset(c, 0, sizeof(rpc_cli_t));
685: array_Set(srv->srv_blob.clients, i, c);
686: c->cli_id = i;
687: c->cli_parent = srv;
688: }
689:
690: /* alloc empty buffer */
691: AIT_SET_BUFSIZ(&c->cli_buf, 0, srv->srv_netbuf);
692:
693: /* accept client */
694: c->cli_sock = accept(TASK_FD(task), &c->cli_sa.sa, &salen);
695: if (c->cli_sock == -1) {
696: LOGERR;
697: AIT_FREE_VAL(&c->cli_buf);
698: array_Del(srv->srv_blob.clients, i, 42);
699: goto end;
700: } else {
701: #ifdef TCP_NOPUSH
702: setsockopt(c->cli_sock, IPPROTO_TCP, TCP_NOPUSH, &n, sizeof n);
703: #endif
704: fcntl(c->cli_sock, F_SETFL, fcntl(c->cli_sock, F_GETFL) | O_NONBLOCK);
705: }
706:
707: schedRead(TASK_ROOT(task), rxBLOB, c, c->cli_sock, NULL, 0);
708: end:
709: schedReadSelf(task);
710: return NULL;
711: }
712:
713: /* ------------------------------------------------------ */
714:
715: /*
716: * rpc_srv_initBLOBServer() - Init & create BLOB Server
717: *
718: * @srv = RPC server instance
719: * @Port = Port for bind server, if Port == 0 default port is selected
720: * @diskDir = Disk place for BLOB file objects
721: * return: -1 == error or 0 bind and created BLOB server instance
722: */
723: int
724: rpc_srv_initBLOBServer(rpc_srv_t * __restrict srv, u_short Port, const char *diskDir)
725: {
726: int n = 1;
727:
728: if (!srv || srv->srv_kill) {
729: rpc_SetErr(EINVAL, "Invalid parameters can`t init BLOB server");
730: return -1;
731: }
732:
733: memset(&srv->srv_blob, 0, sizeof srv->srv_blob);
734: if (access(diskDir, R_OK | W_OK) == -1) {
735: LOGERR;
736: return -1;
737: } else
738: AIT_SET_STR(&srv->srv_blob.dir, diskDir);
739:
740: /* init blob list */
741: TAILQ_INIT(&srv->srv_blob.blobs);
742:
743: srv->srv_blob.server.cli_parent = srv;
744:
745: memcpy(&srv->srv_blob.server.cli_sa, &srv->srv_server.cli_sa, sizeof(sockaddr_t));
746: switch (srv->srv_blob.server.cli_sa.sa.sa_family) {
747: case AF_INET:
748: srv->srv_blob.server.cli_sa.sin.sin_port =
749: htons(Port ? Port : ntohs(srv->srv_blob.server.cli_sa.sin.sin_port) + 1);
750: break;
751: case AF_INET6:
752: srv->srv_blob.server.cli_sa.sin6.sin6_port =
753: htons(Port ? Port : ntohs(srv->srv_blob.server.cli_sa.sin6.sin6_port) + 1);
754: break;
755: case AF_LOCAL:
756: strlcat(srv->srv_blob.server.cli_sa.sun.sun_path, ".blob",
757: sizeof srv->srv_blob.server.cli_sa.sun.sun_path);
758: break;
759: default:
760: AIT_FREE_VAL(&srv->srv_blob.dir);
761: return -1;
762: }
763:
764: /* create BLOB server socket */
765: srv->srv_blob.server.cli_sock = socket(srv->srv_server.cli_sa.sa.sa_family, SOCK_STREAM, 0);
766: if (srv->srv_blob.server.cli_sock == -1) {
767: LOGERR;
768: AIT_FREE_VAL(&srv->srv_blob.dir);
769: return -1;
770: }
771: if (setsockopt(srv->srv_blob.server.cli_sock, SOL_SOCKET, SO_REUSEADDR, &n, sizeof n) == -1) {
772: LOGERR;
773: close(srv->srv_blob.server.cli_sock);
774: AIT_FREE_VAL(&srv->srv_blob.dir);
775: return -1;
776: }
777: n = srv->srv_netbuf;
778: if (setsockopt(srv->srv_blob.server.cli_sock, SOL_SOCKET, SO_SNDBUF, &n, sizeof n) == -1) {
779: LOGERR;
780: close(srv->srv_blob.server.cli_sock);
781: AIT_FREE_VAL(&srv->srv_blob.dir);
782: return -1;
783: }
784: if (setsockopt(srv->srv_blob.server.cli_sock, SOL_SOCKET, SO_RCVBUF, &n, sizeof n) == -1) {
785: LOGERR;
786: close(srv->srv_blob.server.cli_sock);
787: AIT_FREE_VAL(&srv->srv_blob.dir);
788: return -1;
789: }
790: if (bind(srv->srv_blob.server.cli_sock, &srv->srv_blob.server.cli_sa.sa,
791: srv->srv_blob.server.cli_sa.sa.sa_len) == -1) {
792: LOGERR;
793: close(srv->srv_blob.server.cli_sock);
794: AIT_FREE_VAL(&srv->srv_blob.dir);
795: return -1;
796: } else
797: fcntl(srv->srv_blob.server.cli_sock, F_SETFL,
798: fcntl(srv->srv_blob.server.cli_sock, F_GETFL) | O_NONBLOCK);
799:
800:
801: /* allocate pool for concurent blob clients */
802: srv->srv_blob.clients = array_Init(array_Size(srv->srv_clients));
803: if (!srv->srv_blob.clients) {
804: rpc_SetErr(elwix_GetErrno(), "%s", elwix_GetError());
805: close(srv->srv_blob.server.cli_sock);
806: AIT_FREE_VAL(&srv->srv_blob.dir);
807: return -1;
808: }
809:
810: /* init blob scheduler */
811: srv->srv_blob.root = schedBegin();
812: if (!srv->srv_blob.root) {
813: rpc_SetErr(sched_GetErrno(), "%s", sched_GetError());
814: array_Destroy(&srv->srv_blob.clients);
815: close(srv->srv_blob.server.cli_sock);
816: AIT_FREE_VAL(&srv->srv_blob.dir);
817: return -1;
818: }
819:
820: return 0;
821: }
822:
823: /*
824: * rpc_srv_endBLOBServer() - Destroy BLOB server, close all opened sockets and free resources
825: *
826: * @srv = RPC Server instance
827: * return: none
828: */
829: inline void
830: rpc_srv_endBLOBServer(rpc_srv_t * __restrict srv)
831: {
832: if (!srv)
833: return;
834:
835: srv->srv_blob.kill = 1;
836: }
837:
838: /*
839: * rpc_srv_loopBLOBServer() - Execute Main BLOB server loop and wait for clients requests
840: *
841: * @srv = RPC Server instance
842: * return: -1 error or 0 ok, infinite loop ...
843: */
844: int
845: rpc_srv_loopBLOBServer(rpc_srv_t * __restrict srv)
846: {
847: rpc_cli_t *c;
848: register int i;
849: rpc_blob_t *b, *tmp;
850: struct timespec ts = { RPC_SCHED_POLLING, 0 };
851:
852: if (!srv || srv->srv_kill) {
853: rpc_SetErr(EINVAL, "Invalid parameter can`t start BLOB server");
854: return -1;
855: }
856:
857: if (listen(srv->srv_blob.server.cli_sock, array_Size(srv->srv_blob.clients)) == -1) {
858: LOGERR;
859: return -1;
860: }
861:
862: if (!schedRead(srv->srv_blob.root, acceptBLOBClients, srv,
863: srv->srv_blob.server.cli_sock, NULL, 0)) {
864: rpc_SetErr(sched_GetErrno(), "%s", sched_GetError());
865: return -1;
866: }
867:
868: schedPolling(srv->srv_blob.root, &ts, NULL);
869: /* main rpc loop */
870: schedRun(srv->srv_blob.root, &srv->srv_blob.kill);
871:
872: /* close all clients connections & server socket */
873: for (i = 0; i < array_Size(srv->srv_blob.clients); i++) {
874: c = array(srv->srv_blob.clients, i, rpc_cli_t*);
875: if (c) {
876: shutdown(c->cli_sock, SHUT_RDWR);
877: close(c->cli_sock);
878:
879: schedCancelby(srv->srv_blob.root, taskMAX, CRITERIA_ARG, c, NULL);
880: AIT_FREE_VAL(&c->cli_buf);
881: }
882: array_Del(srv->srv_blob.clients, i, 42);
883: }
884: array_Destroy(&srv->srv_blob.clients);
885:
886: close(srv->srv_blob.server.cli_sock);
887:
888: /* detach blobs */
889: TAILQ_FOREACH_SAFE(b, &srv->srv_blob.blobs, blob_node, tmp) {
890: TAILQ_REMOVE(&srv->srv_blob.blobs, b, blob_node);
891:
892: rpc_srv_blobFree(srv, b);
893: e_free(b);
894: }
895:
896: schedEnd(&srv->srv_blob.root);
897: AIT_FREE_VAL(&srv->srv_blob.dir);
898: return 0;
899: }
900:
901:
902: /*
903: * rpc_srv_initServer() - Init & create RPC Server
904: *
905: * @InstID = Instance for authentication & recognition
906: * @concurentClients = Concurent clients at same time to this server
907: * @netBuf = Network buffer length (min:512 bytes), if =0 == BUFSIZ (also meaning max RPC packet)
908: * @csHost = Host name or address for bind server, if NULL any address
909: * @Port = Port for bind server, if Port == 0 default port is selected
910: * @proto = Protocol, if == 0 choose SOCK_STREAM
911: * return: NULL == error or !=NULL bind and created RPC server instance
912: */
913: rpc_srv_t *
914: rpc_srv_initServer(u_char InstID, int concurentClients, int netBuf,
915: const char *csHost, u_short Port, int proto)
916: {
917: int n = 1;
918: rpc_srv_t *srv = NULL;
919: sockaddr_t sa = E_SOCKADDR_INIT;
920:
921: if (!concurentClients || (proto < 0 || proto > SOCK_DGRAM)) {
922: rpc_SetErr(EINVAL, "Invalid parameters can`t init RPC server");
923: return NULL;
924: }
925: if (!e_gethostbyname(csHost, Port, &sa))
926: return NULL;
927: if (!Port)
928: Port = RPC_DEFPORT;
929: if (!proto)
930: proto = SOCK_STREAM;
931: if (netBuf < RPC_MIN_BUFSIZ)
932: netBuf = BUFSIZ;
933: else
934: netBuf = E_ALIGN(netBuf, 2); /* align netBuf length */
935:
936: #ifdef HAVE_SRANDOMDEV
937: srandomdev();
938: #else
939: time_t tim;
940:
941: srandom((time(&tim) ^ getpid()));
942: #endif
943:
944: srv = e_malloc(sizeof(rpc_srv_t));
945: if (!srv) {
946: LOGERR;
947: return NULL;
948: } else
949: memset(srv, 0, sizeof(rpc_srv_t));
950:
951: srv->srv_proto = proto;
952: srv->srv_netbuf = netBuf;
953: srv->srv_session.sess_version = RPC_VERSION;
954: srv->srv_session.sess_instance = InstID;
955:
956: srv->srv_server.cli_parent = srv;
957: memcpy(&srv->srv_server.cli_sa, &sa, sizeof srv->srv_server.cli_sa);
958:
959: /* init functions */
960: pthread_mutex_init(&srv->srv_funcs.mtx, NULL);
961: SLIST_INIT(&srv->srv_funcs);
962: AVL_INIT(&srv->srv_funcs);
963:
964: /* init scheduler */
965: srv->srv_root = schedBegin();
966: if (!srv->srv_root) {
967: rpc_SetErr(sched_GetErrno(), "%s", sched_GetError());
968: pthread_mutex_destroy(&srv->srv_funcs.mtx);
969: e_free(srv);
970: return NULL;
971: }
972:
973: /* init pool for clients */
974: srv->srv_clients = array_Init(concurentClients);
975: if (!srv->srv_clients) {
976: rpc_SetErr(elwix_GetErrno(), "%s", elwix_GetError());
977: schedEnd(&srv->srv_root);
978: pthread_mutex_destroy(&srv->srv_funcs.mtx);
979: e_free(srv);
980: return NULL;
981: }
982:
983: /* create server socket */
984: srv->srv_server.cli_sock = socket(srv->srv_server.cli_sa.sa.sa_family, srv->srv_proto, 0);
985: if (srv->srv_server.cli_sock == -1) {
986: LOGERR;
987: array_Destroy(&srv->srv_clients);
988: schedEnd(&srv->srv_root);
989: pthread_mutex_destroy(&srv->srv_funcs.mtx);
990: e_free(srv);
991: return NULL;
992: }
993: if (setsockopt(srv->srv_server.cli_sock, SOL_SOCKET, SO_REUSEADDR, &n, sizeof n) == -1) {
994: LOGERR;
995: goto err;
996: }
997: n = srv->srv_netbuf;
998: if (setsockopt(srv->srv_server.cli_sock, SOL_SOCKET, SO_SNDBUF, &n, sizeof n) == -1) {
999: LOGERR;
1000: goto err;
1001: }
1002: if (setsockopt(srv->srv_server.cli_sock, SOL_SOCKET, SO_RCVBUF, &n, sizeof n) == -1) {
1003: LOGERR;
1004: goto err;
1005: }
1006: if (bind(srv->srv_server.cli_sock, &srv->srv_server.cli_sa.sa,
1007: srv->srv_server.cli_sa.sa.sa_len) == -1) {
1008: LOGERR;
1009: goto err;
1010: } else
1011: fcntl(srv->srv_server.cli_sock, F_SETFL,
1012: fcntl(srv->srv_server.cli_sock, F_GETFL) | O_NONBLOCK);
1013:
1014: rpc_register_srvPing(srv);
1015:
1016: return srv;
1017: err: /* error condition */
1018: close(srv->srv_server.cli_sock);
1019: array_Destroy(&srv->srv_clients);
1020: schedEnd(&srv->srv_root);
1021: pthread_mutex_destroy(&srv->srv_funcs.mtx);
1022: e_free(srv);
1023: return NULL;
1024: }
1025:
1026: /*
1027: * rpc_srv_endServer() - Destroy RPC server, close all opened sockets and free resources
1028: *
1029: * @psrv = RPC Server instance
1030: * return: none
1031: */
1032: inline void
1033: rpc_srv_endServer(rpc_srv_t ** __restrict psrv)
1034: {
1035: if (!psrv || !*psrv)
1036: return;
1037:
1038: /* if send kill to blob server */
1039: if (!(*psrv)->srv_blob.kill)
1040: rpc_srv_endBLOBServer(*psrv);
1041:
1042: (*psrv)->srv_kill = 1;
1043: sleep(RPC_SCHED_POLLING);
1044:
1045: pthread_mutex_destroy(&(*psrv)->srv_funcs.mtx);
1046: e_free(*psrv);
1047: *psrv = NULL;
1048: }
1049:
1050: /*
1051: * rpc_srv_loopServer() - Execute Main server loop and wait for clients requests
1052: *
1053: * @srv = RPC Server instance
1054: * return: -1 error or 0 ok, infinite loop ...
1055: */
1056: int
1057: rpc_srv_loopServer(rpc_srv_t * __restrict srv)
1058: {
1059: rpc_cli_t *c;
1060: register int i;
1061: rpc_func_t *f;
1062: struct timespec ts = { RPC_SCHED_POLLING, 0 };
1063:
1064: if (!srv) {
1065: rpc_SetErr(EINVAL, "Invalid parameter can`t start RPC server");
1066: return -1;
1067: }
1068:
1069: if (srv->srv_proto == SOCK_STREAM)
1070: if (listen(srv->srv_server.cli_sock, array_Size(srv->srv_clients)) == -1) {
1071: LOGERR;
1072: return -1;
1073: }
1074:
1075: if (!schedRead(srv->srv_root, cbProto[srv->srv_proto][CB_ACCEPTCLIENT], srv,
1076: srv->srv_server.cli_sock, NULL, 0)) {
1077: rpc_SetErr(sched_GetErrno(), "%s", sched_GetError());
1078: return -1;
1079: }
1080:
1081: schedPolling(srv->srv_root, &ts, NULL);
1082: /* main rpc loop */
1083: schedRun(srv->srv_root, &srv->srv_kill);
1084:
1085: /* close all clients connections & server socket */
1086: for (i = 0; i < array_Size(srv->srv_clients); i++) {
1087: c = array(srv->srv_clients, i, rpc_cli_t*);
1088: if (c) {
1089: shutdown(c->cli_sock, SHUT_RDWR);
1090: close(c->cli_sock);
1091:
1092: schedCancelby(srv->srv_root, taskMAX, CRITERIA_ARG, c, NULL);
1093: ait_freeVars(&RPC_RETVARS(c));
1094: AIT_FREE_VAL(&c->cli_buf);
1095: }
1096: array_Del(srv->srv_clients, i, 42);
1097: }
1098: array_Destroy(&srv->srv_clients);
1099:
1100: close(srv->srv_server.cli_sock);
1101:
1102: /* detach exported calls */
1103: RPC_FUNCS_LOCK(&srv->srv_funcs);
1104: while ((f = SLIST_FIRST(&srv->srv_funcs))) {
1105: SLIST_REMOVE_HEAD(&srv->srv_funcs, func_next);
1106:
1107: AIT_FREE_VAL(&f->func_name);
1108: e_free(f);
1109: }
1110: srv->srv_funcs.avlh_root = NULL;
1111: RPC_FUNCS_UNLOCK(&srv->srv_funcs);
1112:
1113: schedEnd(&srv->srv_root);
1114: return 0;
1115: }
1116:
1117:
1118: /*
1119: * rpc_srv_execCall() Execute registered call from RPC server
1120: *
1121: * @cli = RPC client
1122: * @rpc = IN RPC call structure
1123: * @funcname = Execute RPC function
1124: * @args = IN RPC calling arguments from RPC client
1125: * return: -1 error, !=-1 ok
1126: */
1127: int
1128: rpc_srv_execCall(rpc_cli_t * __restrict cli, struct tagRPCCall * __restrict rpc,
1129: ait_val_t funcname, array_t * __restrict args)
1130: {
1131: rpc_callback_t func;
1132:
1133: if (!cli || !rpc || !AIT_ADDR(&funcname)) {
1134: rpc_SetErr(EINVAL, "Invalid parameter can`t exec function");
1135: return -1;
1136: }
1137:
1138: func = AIT_GET_LIKE(&funcname, rpc_callback_t);
1139: return func(cli, rpc, args);
1140: }
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