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 1.12.2.7 2012/11/19 14:51:52 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: static inline int
71: _check4freeslot(rpc_srv_t * __restrict srv, io_sockaddr_t * __restrict sa)
72: {
73: rpc_cli_t *c = NULL;
74: register int i;
75:
76: /* check free slots for connect */
77: for (i = 0; i < io_arraySize(srv->srv_clients) &&
78: (c = io_array(srv->srv_clients, i, rpc_cli_t*)); i++)
79: /* check for duplicates */
80: if (sa && !io_addrcmp(&c->cli_sa, sa, 42))
81: break;
82: if (i >= io_arraySize(srv->srv_clients))
83: return -1; /* no more free slots! */
84:
85: return i;
86: }
87:
88: static rpc_cli_t *
89: _allocClient(rpc_srv_t * __restrict srv, io_sockaddr_t * __restrict sa)
90: {
91: rpc_cli_t *c = NULL;
92: int n;
93:
94: n = _check4freeslot(srv, sa);
95: if (n == -1)
96: return NULL;
97: else
98: c = io_array(srv->srv_clients, n, rpc_cli_t*);
99:
100: if (!c) {
101: c = io_malloc(sizeof(rpc_cli_t));
102: if (!c) {
103: LOGERR;
104: srv->srv_kill = 1;
105: return NULL;
106: } else {
107: memset(c, 0, sizeof(rpc_cli_t));
108: io_arraySet(srv->srv_clients, n, c);
109: c->cli_id = n;
110: c->cli_parent = srv;
111: }
112:
113: /* alloc empty buffer */
114: AIT_SET_BUF2(&c->cli_buf, 0, srv->srv_netbuf);
115: }
116:
117: return c;
118: }
119:
120:
121: static void *
122: freeClient(sched_task_t *task)
123: {
124: rpc_cli_t *c = TASK_ARG(task);
125: rpc_srv_t *s = c->cli_parent;
126:
127: schedCancelby(TASK_ROOT(task), taskMAX, CRITERIA_ARG, TASK_ARG(task), NULL);
128:
129: /* free buffer */
130: AIT_FREE_VAL(&c->cli_buf);
131:
132: io_arrayDel(s->srv_clients, c->cli_id, 0);
133: if (c)
134: io_free(c);
135: return NULL;
136: }
137:
138: static void *
139: closeClient(sched_task_t *task)
140: {
141: rpc_cli_t *c = TASK_ARG(task);
142: rpc_srv_t *s = c->cli_parent;
143:
144: schedCancelby(TASK_ROOT(task), taskMAX, CRITERIA_ARG, TASK_ARG(task), NULL);
145:
146: /* close client socket */
147: if (TASK_VAL(task))
148: shutdown(c->cli_sock, SHUT_RDWR);
149: close(c->cli_sock);
150:
151: /* free buffer */
152: AIT_FREE_VAL(&c->cli_buf);
153:
154: io_arrayDel(s->srv_clients, c->cli_id, 0);
155: if (c)
156: io_free(c);
157: return NULL;
158: }
159:
160: static void *
161: txPacket(sched_task_t *task)
162: {
163: rpc_cli_t *c = TASK_ARG(task);
164: rpc_srv_t *s = c->cli_parent;
165: rpc_func_t *f = NULL;
166: u_char buf[USHRT_MAX] = { 0 };
167: struct tagRPCCall *rpc = (struct tagRPCCall*) buf;
168: int ret, wlen = sizeof(struct tagRPCCall);
169:
170: /* copy RPC header */
171: memcpy(buf, TASK_DATA(task), wlen);
172:
173: if (rpc->call_argc) {
174: f = rpc_srv_getCall(s, ntohs(rpc->call_tag));
175: if (!f) {
176: rpc_SetErr(EPROGUNAVAIL, "Function not found at RPC server");
177: rpc->call_argc ^= rpc->call_argc;
178: rpc->call_rep.ret = RPC_ERROR(-1);
179: rpc->call_rep.eno = RPC_ERROR(rpc_Errno);
180: } else {
181: rpc->call_argc = htons(io_arraySize(RPC_RETVARS(c)));
182: /* Go Encapsulate variables */
183: ret = io_vars2buffer(buf + wlen, sizeof buf - wlen, RPC_RETVARS(c));
184: /* Free return values */
185: io_freeVars(&c->cli_vars);
186: if (ret == -1) {
187: rpc_SetErr(EBADRPC, "Prepare RPC packet failed");
188: rpc->call_argc ^= rpc->call_argc;
189: rpc->call_rep.ret = RPC_ERROR(-1);
190: rpc->call_rep.eno = RPC_ERROR(rpc_Errno);
191: } else
192: wlen += ret;
193: }
194: }
195:
196: rpc->call_len = htons(wlen);
197:
198: /* calculate CRC */
199: rpc->call_crc ^= rpc->call_crc;
200: rpc->call_crc = htons(crcFletcher16((u_short*) buf, wlen / 2));
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), 42, 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 = io_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", io_GetErrno(), io_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: io_freeVars(&c->cli_vars);
256: rpc->call_argc ^= rpc->call_argc;
257: } else {
258: /* reply */
259: rpc->call_argc = htons(io_arraySize(RPC_RETVARS(c)));
260: }
261: }
262: }
263:
264: io_arrayDestroy(&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 crc, off = TASK_DATLEN(task);
275: u_char *buf = AIT_GET_BUF(&c->cli_buf);
276: struct tagRPCCall *rpc;
277:
278: if (!off)
279: memset(buf, 0, AIT_LEN(&c->cli_buf));
280: rlen = recv(TASK_FD(task), buf + off, AIT_LEN(&c->cli_buf) - off, 0);
281: if (rlen < 1) {
282: /* close connection */
283: schedEvent(TASK_ROOT(task), cbProto[s->srv_proto][CB_CLOSECLIENT],
284: TASK_ARG(task), 42, NULL, 0);
285: return NULL;
286: } else {
287: rlen += off; /* add reminded bytes from previous rxPacket, if exists! */
288: off = 0; /* process buffer from start offset == 0 */
289: }
290:
291: do {
292: /* check RPC packet */
293: if (rlen < sizeof(struct tagRPCCall)) {
294: rpc_SetErr(ERPCMISMATCH, "Short RPC packet");
295:
296: /* reminder received previous bytes ;) */
297: schedRead(TASK_ROOT(task), TASK_FUNC(task), TASK_ARG(task),
298: TASK_FD(task), TASK_DATA(task), rlen);
299: return NULL;
300: } else
301: rpc = (struct tagRPCCall*) (buf + off);
302:
303: len = ntohs(rpc->call_len);
304: rlen -= len;
305:
306: /* check RPC packet lengths */
307: if (rlen < 0 || len < sizeof(struct tagRPCCall)) {
308: rpc_SetErr(ERPCMISMATCH, "Broken RPC packet length");
309: /* skip entire packet */
310: break;
311: }
312:
313: /* check integrity of packet */
314: crc = ntohs(rpc->call_crc);
315: rpc->call_crc ^= rpc->call_crc;
316: if (crc != crcFletcher16((u_short*) rpc, len / 2)) {
317: rpc_SetErr(ERPCMISMATCH, "Bad CRC RPC packet");
318:
319: off += len;
320: /* try next packet remaining into buffer */
321: continue;
322: }
323:
324: noreply = RPC_CHK_NOREPLY(rpc);
325:
326: /* check RPC packet session info */
327: if (rpc_chkPktSession(&rpc->call_session, &s->srv_session)) {
328: rpc_SetErr(ERPCMISMATCH, "Get invalid RPC session");
329: rpc->call_argc ^= rpc->call_argc;
330: rpc->call_rep.ret = RPC_ERROR(-1);
331: rpc->call_rep.eno = RPC_ERROR(errno);
332: } else {
333: /* execute RPC call */
334: schedEvent(TASK_ROOT(task), execCall, TASK_ARG(task), off, NULL, 0);
335: }
336:
337: /* send RPC reply */
338: if (!noreply)
339: schedWrite(TASK_ROOT(task), cbProto[s->srv_proto][CB_TXPACKET],
340: TASK_ARG(task), TASK_FD(task), rpc, len);
341:
342: off += len;
343: } while (rlen > 0);
344:
345: /* lets get next packet */
346: schedRead(TASK_ROOT(task), TASK_FUNC(task), TASK_ARG(task), TASK_FD(task), TASK_DATA(task), 0);
347: return NULL;
348: }
349:
350: static void *
351: acceptClients(sched_task_t *task)
352: {
353: rpc_srv_t *srv = TASK_ARG(task);
354: rpc_cli_t *c = NULL;
355: socklen_t salen = sizeof(io_sockaddr_t);
356:
357: c = _allocClient(srv, NULL);
358: if (!c)
359: goto end;
360:
361: /* accept client */
362: c->cli_sock = accept(TASK_FD(task), &c->cli_sa.sa, &salen);
363: if (c->cli_sock == -1) {
364: LOGERR;
365: AIT_FREE_VAL(&c->cli_buf);
366: io_arrayDel(srv->srv_clients, c->cli_id, 42);
367: goto end;
368: } else
369: fcntl(c->cli_sock, F_SETFL, fcntl(c->cli_sock, F_GETFL) | O_NONBLOCK);
370:
371: schedRead(TASK_ROOT(task), cbProto[srv->srv_proto][CB_RXPACKET], c,
372: c->cli_sock, NULL, 0);
373: end:
374: schedReadSelf(task);
375: return NULL;
376: }
377:
378:
379: static void *
380: txUDPPacket(sched_task_t *task)
381: {
382: rpc_cli_t *c = TASK_ARG(task);
383: rpc_srv_t *s = c->cli_parent;
384: rpc_func_t *f = NULL;
385: u_char buf[USHRT_MAX] = { 0 };
386: struct tagRPCCall *rpc = (struct tagRPCCall*) buf;
387: int ret, wlen = sizeof(struct tagRPCCall);
388: struct timespec ts = { DEF_RPC_TIMEOUT, 0 };
389:
390: schedCancelby(TASK_ROOT(task), taskTIMER, CRITERIA_DATA, TASK_ARG(task), NULL);
391: schedTimer(TASK_ROOT(task), cbProto[s->srv_proto][CB_CLOSECLIENT],
392: TASK_ARG(task), ts, TASK_ARG(task), 0);
393:
394: /* copy RPC header */
395: memcpy(buf, TASK_DATA(task), wlen);
396:
397: if (rpc->call_argc) {
398: f = rpc_srv_getCall(s, ntohs(rpc->call_tag));
399: if (!f) {
400: rpc_SetErr(EPROGUNAVAIL, "Function not found at RPC server");
401: rpc->call_argc ^= rpc->call_argc;
402: rpc->call_rep.ret = RPC_ERROR(-1);
403: rpc->call_rep.eno = RPC_ERROR(rpc_Errno);
404: } else {
405: rpc->call_argc = htons(io_arraySize(RPC_RETVARS(c)));
406: /* Go Encapsulate variables */
407: ret = io_vars2buffer(buf + wlen, sizeof buf - wlen, RPC_RETVARS(c));
408: /* Free return values */
409: io_freeVars(&c->cli_vars);
410: if (ret == -1) {
411: rpc_SetErr(EBADRPC, "Prepare RPC packet failed");
412: rpc->call_argc ^= rpc->call_argc;
413: rpc->call_rep.ret = RPC_ERROR(-1);
414: rpc->call_rep.eno = RPC_ERROR(rpc_Errno);
415: } else
416: wlen += ret;
417: }
418: }
419:
420: rpc->call_len = htons(wlen);
421:
422: /* calculate CRC */
423: rpc->call_crc ^= rpc->call_crc;
424: rpc->call_crc = htons(crcFletcher16((u_short*) buf, wlen / 2));
425:
426: /* send reply */
427: ret = sendto(TASK_FD(task), buf, wlen, MSG_NOSIGNAL,
428: &c->cli_sa.sa, c->cli_sa.sa.sa_len);
429: if (ret == -1 || ret != wlen) {
430: /* close connection */
431: schedEvent(TASK_ROOT(task), cbProto[s->srv_proto][CB_CLOSECLIENT],
432: TASK_ARG(task), 42, NULL, 0);
433: }
434:
435: return NULL;
436: }
437:
438: static void *
439: rxUDPPacket(sched_task_t *task)
440: {
441: rpc_srv_t *srv = TASK_ARG(task);
442: rpc_cli_t *c = NULL;
443: socklen_t salen = sizeof(io_sockaddr_t);
444: int len, rlen, noreply;
445: u_short crc, off = 0;
446: u_char buf[USHRT_MAX + 1];
447: struct tagRPCCall *rpc = (struct tagRPCCall*) buf;
448: io_sockaddr_t sa;
449: struct timespec ts = { DEF_RPC_TIMEOUT, 0 };
450:
451: /* receive connect packet */
452: rlen = recvfrom(TASK_FD(task), buf, sizeof buf, 0, &sa.sa, &salen);
453: if (rlen < 1)
454: goto end;
455:
456: c = _allocClient(srv, &sa);
457: if (!c)
458: goto end;
459: else {
460: memcpy(&c->cli_sa, &sa, sizeof c->cli_sa);
461: memcpy(AIT_GET_BUF(&c->cli_buf), buf, AIT_LEN(&c->cli_buf));
462: /* armed timer for close stateless connection */
463: schedCancelby(TASK_ROOT(task), taskTIMER, CRITERIA_DATA, c, NULL);
464: schedTimer(TASK_ROOT(task), cbProto[srv->srv_proto][CB_CLOSECLIENT],
465: c, ts, c, 0);
466: }
467:
468: do {
469: /* check RPC packet */
470: if (rlen < sizeof(struct tagRPCCall)) {
471: rpc_SetErr(ERPCMISMATCH, "Short RPC packet");
472: break;
473: } else
474: rpc = (struct tagRPCCall*) (AIT_GET_BUF(&c->cli_buf) + off);
475:
476: len = ntohs(rpc->call_len);
477: rlen -= len;
478:
479: /* check RPC packet lengths */
480: if (rlen < 0 || len < sizeof(struct tagRPCCall)) {
481: rpc_SetErr(ERPCMISMATCH, "Broken RPC packet length");
482: /* skip entire packet */
483: break;
484: }
485:
486: /* check integrity of packet */
487: crc = ntohs(rpc->call_crc);
488: rpc->call_crc ^= rpc->call_crc;
489: if (crc != crcFletcher16((u_short*) rpc, len / 2)) {
490: rpc_SetErr(ERPCMISMATCH, "Bad CRC RPC packet");
491:
492: off += len;
493: /* try next packet remaining into buffer */
494: continue;
495: }
496:
497: noreply = RPC_CHK_NOREPLY(rpc);
498:
499: /* check RPC packet session info */
500: if (rpc_chkPktSession(&rpc->call_session, &srv->srv_session)) {
501: rpc_SetErr(ERPCMISMATCH, "Get invalid RPC session");
502: rpc->call_argc ^= rpc->call_argc;
503: rpc->call_rep.ret = RPC_ERROR(-1);
504: rpc->call_rep.eno = RPC_ERROR(errno);
505: } else {
506: /* execute RPC call */
507: schedEvent(TASK_ROOT(task), execCall, c, off, NULL, 0);
508: }
509:
510: /* send RPC reply */
511: if (!noreply)
512: schedWrite(TASK_ROOT(task), cbProto[srv->srv_proto][CB_TXPACKET],
513: c, TASK_FD(task), rpc, len);
514:
515: off += len;
516: } while (rlen > 0);
517:
518: end:
519: schedReadSelf(task);
520: return NULL;
521: }
522:
523: /* ------------------------------------------------------ */
524:
525: static void *
526: closeBLOBClient(sched_task_t *task)
527: {
528: rpc_cli_t *c = TASK_ARG(task);
529: rpc_srv_t *s = c->cli_parent;
530:
531: schedCancelby(TASK_ROOT(task), taskMAX, CRITERIA_ARG, TASK_ARG(task), NULL);
532:
533: /* close client socket */
534: if (TASK_VAL(task))
535: shutdown(c->cli_sock, SHUT_RDWR);
536: close(c->cli_sock);
537:
538: /* free buffer */
539: AIT_FREE_VAL(&c->cli_buf);
540:
541: io_arrayDel(s->srv_blob.clients, c->cli_id, 0);
542: if (c)
543: io_free(c);
544: return NULL;
545: }
546:
547: static void *
548: txBLOB(sched_task_t *task)
549: {
550: rpc_cli_t *c = TASK_ARG(task);
551: u_char *buf = AIT_GET_BUF(&c->cli_buf);
552: struct tagBLOBHdr *blob = (struct tagBLOBHdr *) buf;
553: int wlen = sizeof(struct tagBLOBHdr);
554:
555: /* calculate CRC */
556: blob->hdr_crc ^= blob->hdr_crc;
557: blob->hdr_crc = htons(crcFletcher16((u_short*) buf, wlen / 2));
558:
559: /* send reply */
560: wlen = send(TASK_FD(task), buf, wlen, MSG_NOSIGNAL);
561: if (wlen == -1 || wlen != sizeof(struct tagBLOBHdr)) {
562: /* close blob connection */
563: schedEvent(TASK_ROOT(task), closeBLOBClient, c, 42, NULL, 0);
564: }
565:
566: return NULL;
567: }
568:
569: static void *
570: rxBLOB(sched_task_t *task)
571: {
572: rpc_cli_t *c = TASK_ARG(task);
573: rpc_srv_t *s = c->cli_parent;
574: rpc_blob_t *b;
575: struct tagBLOBHdr blob;
576: int rlen;
577: u_short crc;
578:
579: memset(&blob, 0, sizeof blob);
580: rlen = recv(TASK_FD(task), &blob, sizeof blob, 0);
581: if (rlen < 1) {
582: /* close blob connection */
583: schedEvent(TASK_ROOT(task), closeBLOBClient, c, 42, NULL, 0);
584: return NULL;
585: }
586:
587: /* check BLOB packet */
588: if (rlen < sizeof(struct tagBLOBHdr)) {
589: rpc_SetErr(ERPCMISMATCH, "Short BLOB packet");
590:
591: schedReadSelf(task);
592: return NULL;
593: }
594:
595: /* check integrity of packet */
596: crc = ntohs(blob.hdr_crc);
597: blob.hdr_crc ^= blob.hdr_crc;
598: if (crc != crcFletcher16((u_short*) &blob, rlen / 2)) {
599: rpc_SetErr(ERPCMISMATCH, "Bad CRC BLOB packet");
600:
601: schedReadSelf(task);
602: return NULL;
603: }
604:
605: /* check RPC packet session info */
606: if ((crc = rpc_chkPktSession(&blob.hdr_session, &s->srv_session))) {
607: rpc_SetErr(ERPCMISMATCH, "Get invalid RPC session");
608: blob.hdr_cmd = error;
609: goto end;
610: }
611:
612: /* Go to proceed packet ... */
613: switch (blob.hdr_cmd) {
614: case get:
615: if (!(b = rpc_srv_getBLOB(s, ntohl(blob.hdr_var)))) {
616: rpc_SetErr(EINVAL, "Var=%x not found", ntohl(blob.hdr_var));
617: blob.hdr_cmd = no;
618: blob.hdr_ret = RPC_ERROR(-1);
619: break;
620: } else
621: blob.hdr_len = htonl(b->blob_len);
622:
623: if (rpc_srv_blobMap(s, b) != -1) {
624: /* deliver BLOB variable to client */
625: blob.hdr_ret = htonl(rpc_srv_sendBLOB(c, b));
626: rpc_srv_blobUnmap(b);
627: } else {
628: blob.hdr_cmd = error;
629: blob.hdr_ret = RPC_ERROR(-1);
630: }
631: break;
632: case set:
633: if ((b = rpc_srv_registerBLOB(s, ntohl(blob.hdr_len)))) {
634: /* set new BLOB variable for reply :) */
635: blob.hdr_var = htonl(b->blob_var);
636:
637: /* receive BLOB from client */
638: blob.hdr_ret = htonl(rpc_srv_recvBLOB(c, b));
639: rpc_srv_blobUnmap(b);
640: } else {
641: blob.hdr_cmd = error;
642: blob.hdr_ret = RPC_ERROR(-1);
643: }
644: break;
645: case unset:
646: if (rpc_srv_unregisterBLOB(s, ntohl(blob.hdr_var)) == -1) {
647: blob.hdr_cmd = error;
648: blob.hdr_ret = RPC_ERROR(-1);
649: }
650: break;
651: default:
652: rpc_SetErr(EPROCUNAVAIL, "Unsupported BLOB command %d", blob.hdr_cmd);
653: blob.hdr_cmd = error;
654: blob.hdr_ret = RPC_ERROR(-1);
655: }
656:
657: end:
658: memcpy(AIT_ADDR(&c->cli_buf), &blob, sizeof blob);
659: schedWrite(TASK_ROOT(task), txBLOB, TASK_ARG(task), TASK_FD(task), NULL, 0);
660: schedReadSelf(task);
661: return NULL;
662: }
663:
664: static void *
665: acceptBLOBClients(sched_task_t *task)
666: {
667: rpc_srv_t *srv = TASK_ARG(task);
668: rpc_cli_t *c = NULL;
669: register int i;
670: socklen_t salen = sizeof(io_sockaddr_t);
671: #ifdef TCP_NOPUSH
672: int n = 1;
673: #endif
674:
675: /* check free slots for connect */
676: for (i = 0; i < io_arraySize(srv->srv_blob.clients) &&
677: (c = io_array(srv->srv_blob.clients, i, rpc_cli_t*)); i++);
678: if (c) /* no more free slots! */
679: goto end;
680: c = io_malloc(sizeof(rpc_cli_t));
681: if (!c) {
682: LOGERR;
683: srv->srv_kill = srv->srv_blob.kill = 1;
684: return NULL;
685: } else {
686: memset(c, 0, sizeof(rpc_cli_t));
687: io_arraySet(srv->srv_blob.clients, i, c);
688: c->cli_id = i;
689: c->cli_parent = srv;
690: }
691:
692: /* alloc empty buffer */
693: AIT_SET_BUF2(&c->cli_buf, 0, srv->srv_netbuf);
694:
695: /* accept client */
696: c->cli_sock = accept(TASK_FD(task), &c->cli_sa.sa, &salen);
697: if (c->cli_sock == -1) {
698: LOGERR;
699: AIT_FREE_VAL(&c->cli_buf);
700: io_arrayDel(srv->srv_blob.clients, i, 42);
701: goto end;
702: } else {
703: #ifdef TCP_NOPUSH
704: setsockopt(c->cli_sock, IPPROTO_TCP, TCP_NOPUSH, &n, sizeof n);
705: #endif
706: fcntl(c->cli_sock, F_SETFL, fcntl(c->cli_sock, F_GETFL) | O_NONBLOCK);
707: }
708:
709: schedRead(TASK_ROOT(task), rxBLOB, c, c->cli_sock, NULL, 0);
710: end:
711: schedReadSelf(task);
712: return NULL;
713: }
714:
715: /* ------------------------------------------------------ */
716:
717: /*
718: * rpc_srv_initBLOBServer() - Init & create BLOB Server
719: *
720: * @srv = RPC server instance
721: * @Port = Port for bind server, if Port == 0 default port is selected
722: * @diskDir = Disk place for BLOB file objects
723: * return: -1 == error or 0 bind and created BLOB server instance
724: */
725: int
726: rpc_srv_initBLOBServer(rpc_srv_t * __restrict srv, u_short Port, const char *diskDir)
727: {
728: int n = 1;
729:
730: if (!srv || srv->srv_kill) {
731: rpc_SetErr(EINVAL, "Invalid parameters can`t init BLOB server");
732: return -1;
733: }
734:
735: memset(&srv->srv_blob, 0, sizeof srv->srv_blob);
736: if (access(diskDir, R_OK | W_OK) == -1) {
737: LOGERR;
738: return -1;
739: } else
740: AIT_SET_STR(&srv->srv_blob.dir, diskDir);
741:
742: /* init blob list */
743: TAILQ_INIT(&srv->srv_blob.blobs);
744:
745: srv->srv_blob.server.cli_parent = srv;
746:
747: memcpy(&srv->srv_blob.server.cli_sa, &srv->srv_server.cli_sa, sizeof(io_sockaddr_t));
748: switch (srv->srv_blob.server.cli_sa.sa.sa_family) {
749: case AF_INET:
750: srv->srv_blob.server.cli_sa.sin.sin_port =
751: htons(Port ? Port : ntohs(srv->srv_blob.server.cli_sa.sin.sin_port) + 1);
752: break;
753: case AF_INET6:
754: srv->srv_blob.server.cli_sa.sin6.sin6_port =
755: htons(Port ? Port : ntohs(srv->srv_blob.server.cli_sa.sin6.sin6_port) + 1);
756: break;
757: case AF_LOCAL:
758: strlcat(srv->srv_blob.server.cli_sa.sun.sun_path, ".blob",
759: sizeof srv->srv_blob.server.cli_sa.sun.sun_path);
760: break;
761: default:
762: AIT_FREE_VAL(&srv->srv_blob.dir);
763: return -1;
764: }
765:
766: /* create BLOB server socket */
767: srv->srv_blob.server.cli_sock = socket(srv->srv_server.cli_sa.sa.sa_family, SOCK_STREAM, 0);
768: if (srv->srv_blob.server.cli_sock == -1) {
769: LOGERR;
770: AIT_FREE_VAL(&srv->srv_blob.dir);
771: return -1;
772: }
773: if (setsockopt(srv->srv_blob.server.cli_sock, SOL_SOCKET, SO_REUSEADDR, &n, sizeof n) == -1) {
774: LOGERR;
775: close(srv->srv_blob.server.cli_sock);
776: AIT_FREE_VAL(&srv->srv_blob.dir);
777: return -1;
778: }
779: n = srv->srv_netbuf;
780: if (setsockopt(srv->srv_blob.server.cli_sock, SOL_SOCKET, SO_SNDBUF, &n, sizeof n) == -1) {
781: LOGERR;
782: close(srv->srv_blob.server.cli_sock);
783: AIT_FREE_VAL(&srv->srv_blob.dir);
784: return -1;
785: }
786: if (setsockopt(srv->srv_blob.server.cli_sock, SOL_SOCKET, SO_RCVBUF, &n, sizeof n) == -1) {
787: LOGERR;
788: close(srv->srv_blob.server.cli_sock);
789: AIT_FREE_VAL(&srv->srv_blob.dir);
790: return -1;
791: }
792: if (bind(srv->srv_blob.server.cli_sock, &srv->srv_blob.server.cli_sa.sa,
793: srv->srv_blob.server.cli_sa.sa.sa_len) == -1) {
794: LOGERR;
795: close(srv->srv_blob.server.cli_sock);
796: AIT_FREE_VAL(&srv->srv_blob.dir);
797: return -1;
798: } else
799: fcntl(srv->srv_blob.server.cli_sock, F_SETFL,
800: fcntl(srv->srv_blob.server.cli_sock, F_GETFL) | O_NONBLOCK);
801:
802:
803: /* allocate pool for concurent blob clients */
804: srv->srv_blob.clients = io_arrayInit(io_arraySize(srv->srv_clients));
805: if (!srv->srv_blob.clients) {
806: rpc_SetErr(io_GetErrno(), "%s", io_GetError());
807: close(srv->srv_blob.server.cli_sock);
808: AIT_FREE_VAL(&srv->srv_blob.dir);
809: return -1;
810: }
811:
812: /* init blob scheduler */
813: srv->srv_blob.root = schedBegin();
814: if (!srv->srv_blob.root) {
815: rpc_SetErr(sched_GetErrno(), "%s", sched_GetError());
816: io_arrayDestroy(&srv->srv_blob.clients);
817: close(srv->srv_blob.server.cli_sock);
818: AIT_FREE_VAL(&srv->srv_blob.dir);
819: return -1;
820: }
821:
822: return 0;
823: }
824:
825: /*
826: * rpc_srv_endBLOBServer() - Destroy BLOB server, close all opened sockets and free resources
827: *
828: * @srv = RPC Server instance
829: * return: none
830: */
831: inline void
832: rpc_srv_endBLOBServer(rpc_srv_t * __restrict srv)
833: {
834: if (!srv)
835: return;
836:
837: srv->srv_blob.kill = 1;
838: }
839:
840: /*
841: * rpc_srv_loopBLOBServer() - Execute Main BLOB server loop and wait for clients requests
842: *
843: * @srv = RPC Server instance
844: * return: -1 error or 0 ok, infinite loop ...
845: */
846: int
847: rpc_srv_loopBLOBServer(rpc_srv_t * __restrict srv)
848: {
849: rpc_cli_t *c;
850: register int i;
851: rpc_blob_t *b, *tmp;
852: struct timespec ts = { RPC_SCHED_POLLING, 0 };
853:
854: if (!srv || srv->srv_kill) {
855: rpc_SetErr(EINVAL, "Invalid parameter can`t start BLOB server");
856: return -1;
857: }
858:
859: if (listen(srv->srv_blob.server.cli_sock, io_arraySize(srv->srv_blob.clients)) == -1) {
860: LOGERR;
861: return -1;
862: }
863:
864: if (!schedRead(srv->srv_blob.root, acceptBLOBClients, srv,
865: srv->srv_blob.server.cli_sock, NULL, 0)) {
866: rpc_SetErr(sched_GetErrno(), "%s", sched_GetError());
867: return -1;
868: }
869:
870: schedPolling(srv->srv_blob.root, &ts, NULL);
871: /* main rpc loop */
872: schedRun(srv->srv_blob.root, &srv->srv_blob.kill);
873:
874: /* close all clients connections & server socket */
875: for (i = 0; i < io_arraySize(srv->srv_blob.clients); i++) {
876: c = io_array(srv->srv_blob.clients, i, rpc_cli_t*);
877: if (c) {
878: shutdown(c->cli_sock, SHUT_RDWR);
879: close(c->cli_sock);
880:
881: schedCancelby(srv->srv_blob.root, taskMAX, CRITERIA_ARG, c, NULL);
882: AIT_FREE_VAL(&c->cli_buf);
883: }
884: io_arrayDel(srv->srv_blob.clients, i, 42);
885: }
886: io_arrayDestroy(&srv->srv_blob.clients);
887:
888: close(srv->srv_blob.server.cli_sock);
889:
890: /* detach blobs */
891: TAILQ_FOREACH_SAFE(b, &srv->srv_blob.blobs, blob_node, tmp) {
892: TAILQ_REMOVE(&srv->srv_blob.blobs, b, blob_node);
893:
894: rpc_srv_blobFree(srv, b);
895: io_free(b);
896: }
897:
898: schedEnd(&srv->srv_blob.root);
899: AIT_FREE_VAL(&srv->srv_blob.dir);
900: return 0;
901: }
902:
903:
904: /*
905: * rpc_srv_initServer() - Init & create RPC Server
906: *
907: * @regProgID = ProgramID for authentication & recognition
908: * @regProcID = ProcessID for authentication & recognition
909: * @concurentClients = Concurent clients at same time to this server
910: * @netBuf = Network buffer length (min:512 bytes), if =0 == BUFSIZ (also meaning max RPC packet)
911: * @csHost = Host name or address for bind server, if NULL any address
912: * @Port = Port for bind server, if Port == 0 default port is selected
913: * @proto = Protocol, if == 0 choose SOCK_STREAM
914: * return: NULL == error or !=NULL bind and created RPC server instance
915: */
916: rpc_srv_t *
917: rpc_srv_initServer(u_int regProgID, u_char regProcID, int concurentClients,
918: int netBuf, const char *csHost, u_short Port, int proto)
919: {
920: int n = 1;
921: rpc_srv_t *srv = NULL;
922: io_sockaddr_t sa = IO_SOCKADDR_INIT;
923:
924: if (!concurentClients || !regProgID || (proto < 0 || proto > SOCK_DGRAM)) {
925: rpc_SetErr(EINVAL, "Invalid parameters can`t init RPC server");
926: return NULL;
927: }
928: if (!io_gethostbyname(csHost, Port, &sa))
929: return NULL;
930: if (!Port)
931: Port = RPC_DEFPORT;
932: if (!proto)
933: proto = SOCK_STREAM;
934: if (netBuf < RPC_MIN_BUFSIZ)
935: netBuf = BUFSIZ;
936: else
937: netBuf = io_align(netBuf, 2); /* align netBuf length */
938:
939: #ifdef HAVE_SRANDOMDEV
940: srandomdev();
941: #else
942: time_t tim;
943:
944: srandom((time(&tim) ^ getpid()));
945: #endif
946:
947: srv = io_malloc(sizeof(rpc_srv_t));
948: if (!srv) {
949: LOGERR;
950: return NULL;
951: } else
952: memset(srv, 0, sizeof(rpc_srv_t));
953:
954: srv->srv_proto = proto;
955: srv->srv_netbuf = netBuf;
956: srv->srv_session.sess_version = RPC_VERSION;
957: srv->srv_session.sess_program = regProgID;
958: srv->srv_session.sess_process = regProcID;
959:
960: srv->srv_server.cli_parent = srv;
961: memcpy(&srv->srv_server.cli_sa, &sa, sizeof srv->srv_server.cli_sa);
962:
963: /* init functions */
964: pthread_mutex_init(&srv->srv_funcs.mtx, NULL);
965: SLIST_INIT(&srv->srv_funcs);
966: AVL_INIT(&srv->srv_funcs);
967:
968: /* init scheduler */
969: srv->srv_root = schedBegin();
970: if (!srv->srv_root) {
971: rpc_SetErr(sched_GetErrno(), "%s", sched_GetError());
972: pthread_mutex_destroy(&srv->srv_funcs.mtx);
973: io_free(srv);
974: return NULL;
975: }
976:
977: /* init pool for clients */
978: srv->srv_clients = io_arrayInit(concurentClients);
979: if (!srv->srv_clients) {
980: rpc_SetErr(io_GetErrno(), "%s", io_GetError());
981: schedEnd(&srv->srv_root);
982: pthread_mutex_destroy(&srv->srv_funcs.mtx);
983: io_free(srv);
984: return NULL;
985: }
986:
987: /* create server socket */
988: srv->srv_server.cli_sock = socket(srv->srv_server.cli_sa.sa.sa_family, srv->srv_proto, 0);
989: if (srv->srv_server.cli_sock == -1) {
990: LOGERR;
991: io_arrayDestroy(&srv->srv_clients);
992: schedEnd(&srv->srv_root);
993: pthread_mutex_destroy(&srv->srv_funcs.mtx);
994: io_free(srv);
995: return NULL;
996: }
997: if (setsockopt(srv->srv_server.cli_sock, SOL_SOCKET, SO_REUSEADDR, &n, sizeof n) == -1) {
998: LOGERR;
999: goto err;
1000: }
1001: n = srv->srv_netbuf;
1002: if (setsockopt(srv->srv_server.cli_sock, SOL_SOCKET, SO_SNDBUF, &n, sizeof n) == -1) {
1003: LOGERR;
1004: goto err;
1005: }
1006: if (setsockopt(srv->srv_server.cli_sock, SOL_SOCKET, SO_RCVBUF, &n, sizeof n) == -1) {
1007: LOGERR;
1008: goto err;
1009: }
1010: if (bind(srv->srv_server.cli_sock, &srv->srv_server.cli_sa.sa,
1011: srv->srv_server.cli_sa.sa.sa_len) == -1) {
1012: LOGERR;
1013: goto err;
1014: } else
1015: fcntl(srv->srv_server.cli_sock, F_SETFL,
1016: fcntl(srv->srv_server.cli_sock, F_GETFL) | O_NONBLOCK);
1017:
1018: rpc_register_srvPing(srv);
1019:
1020: return srv;
1021: err: /* error condition */
1022: close(srv->srv_server.cli_sock);
1023: io_arrayDestroy(&srv->srv_clients);
1024: schedEnd(&srv->srv_root);
1025: pthread_mutex_destroy(&srv->srv_funcs.mtx);
1026: io_free(srv);
1027: return NULL;
1028: }
1029:
1030: /*
1031: * rpc_srv_endServer() - Destroy RPC server, close all opened sockets and free resources
1032: *
1033: * @psrv = RPC Server instance
1034: * return: none
1035: */
1036: inline void
1037: rpc_srv_endServer(rpc_srv_t ** __restrict psrv)
1038: {
1039: if (!psrv || !*psrv)
1040: return;
1041:
1042: /* if send kill to blob server */
1043: if (!(*psrv)->srv_blob.kill)
1044: rpc_srv_endBLOBServer(*psrv);
1045:
1046: (*psrv)->srv_kill = 1;
1047: sleep(RPC_SCHED_POLLING);
1048:
1049: pthread_mutex_destroy(&(*psrv)->srv_funcs.mtx);
1050: io_free(*psrv);
1051: *psrv = NULL;
1052: }
1053:
1054: /*
1055: * rpc_srv_loopServer() - Execute Main server loop and wait for clients requests
1056: *
1057: * @srv = RPC Server instance
1058: * return: -1 error or 0 ok, infinite loop ...
1059: */
1060: int
1061: rpc_srv_loopServer(rpc_srv_t * __restrict srv)
1062: {
1063: rpc_cli_t *c;
1064: register int i;
1065: rpc_func_t *f;
1066: struct timespec ts = { RPC_SCHED_POLLING, 0 };
1067:
1068: if (!srv) {
1069: rpc_SetErr(EINVAL, "Invalid parameter can`t start RPC server");
1070: return -1;
1071: }
1072:
1073: if (srv->srv_proto == SOCK_STREAM)
1074: if (listen(srv->srv_server.cli_sock,
1075: io_arraySize(srv->srv_clients)) == -1) {
1076: LOGERR;
1077: return -1;
1078: }
1079:
1080: if (!schedRead(srv->srv_root, cbProto[srv->srv_proto][CB_ACCEPTCLIENT], srv,
1081: srv->srv_server.cli_sock, NULL, 0)) {
1082: rpc_SetErr(sched_GetErrno(), "%s", sched_GetError());
1083: return -1;
1084: }
1085:
1086: schedPolling(srv->srv_root, &ts, NULL);
1087: /* main rpc loop */
1088: schedRun(srv->srv_root, &srv->srv_kill);
1089:
1090: /* close all clients connections & server socket */
1091: for (i = 0; i < io_arraySize(srv->srv_clients); i++) {
1092: c = io_array(srv->srv_clients, i, rpc_cli_t*);
1093: if (c) {
1094: shutdown(c->cli_sock, SHUT_RDWR);
1095: close(c->cli_sock);
1096:
1097: schedCancelby(srv->srv_root, taskMAX, CRITERIA_ARG, c, NULL);
1098: io_freeVars(&RPC_RETVARS(c));
1099: AIT_FREE_VAL(&c->cli_buf);
1100: }
1101: io_arrayDel(srv->srv_clients, i, 42);
1102: }
1103: io_arrayDestroy(&srv->srv_clients);
1104:
1105: close(srv->srv_server.cli_sock);
1106:
1107: /* detach exported calls */
1108: RPC_FUNCS_LOCK(&srv->srv_funcs);
1109: while ((f = SLIST_FIRST(&srv->srv_funcs))) {
1110: SLIST_REMOVE_HEAD(&srv->srv_funcs, func_next);
1111:
1112: AIT_FREE_VAL(&f->func_name);
1113: io_free(f);
1114: }
1115: srv->srv_funcs.avlh_root = NULL;
1116: RPC_FUNCS_UNLOCK(&srv->srv_funcs);
1117:
1118: schedEnd(&srv->srv_root);
1119: return 0;
1120: }
1121:
1122:
1123: /*
1124: * rpc_srv_execCall() Execute registered call from RPC server
1125: *
1126: * @cli = RPC client
1127: * @rpc = IN RPC call structure
1128: * @funcname = Execute RPC function
1129: * @args = IN RPC calling arguments from RPC client
1130: * return: -1 error, !=-1 ok
1131: */
1132: int
1133: rpc_srv_execCall(rpc_cli_t * __restrict cli, struct tagRPCCall * __restrict rpc,
1134: ait_val_t funcname, array_t * __restrict args)
1135: {
1136: rpc_callback_t func;
1137:
1138: if (!cli || !rpc || !AIT_ADDR(&funcname)) {
1139: rpc_SetErr(EINVAL, "Invalid parameter can`t exec function");
1140: return -1;
1141: }
1142:
1143: func = AIT_GET_LIKE(&funcname, rpc_callback_t);
1144: return func(cli, rpc, args);
1145: }
FreeBSD-CVSweb <freebsd-cvsweb@FreeBSD.org>
![[BACK]](/icons/cvsweb/back.gif){kind=icon}
Return to srv.c CVS log ![[TXT]](/icons/cvsweb/text.gif){kind=icon}
![[DIR]](/icons/cvsweb/dir.gif){kind=icon}
Up to [ELWIX - Embedded LightWeight unIX -] / libaitrpc / src