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 1.16.2.4 2013/07/15 15:10:38 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[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: 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: ntohl(blob.hdr_ret), c))) {
633: /* set new BLOB variable for reply :) */
634: blob.hdr_var = htonl(b->blob_var);
635:
636: /* receive BLOB from client */
637: blob.hdr_ret = htonl(rpc_srv_recvBLOB(c, b));
638: rpc_srv_blobUnmap(b);
639: } else {
640: blob.hdr_cmd = error;
641: blob.hdr_ret = RPC_ERROR(-1);
642: }
643: break;
644: case unset:
645: if (rpc_srv_unregisterBLOB(s, ntohl(blob.hdr_var)) == -1) {
646: blob.hdr_cmd = error;
647: blob.hdr_ret = RPC_ERROR(-1);
648: }
649: break;
650: default:
651: rpc_SetErr(EPROCUNAVAIL, "Unsupported BLOB command %d", blob.hdr_cmd);
652: blob.hdr_cmd = error;
653: blob.hdr_ret = RPC_ERROR(-1);
654: }
655:
656: end:
657: memcpy(AIT_ADDR(&c->cli_buf), &blob, sizeof blob);
658: schedWrite(TASK_ROOT(task), txBLOB, TASK_ARG(task), TASK_FD(task), NULL, 0);
659: schedReadSelf(task);
660: return NULL;
661: }
662:
663: static void *
664: acceptBLOBClients(sched_task_t *task)
665: {
666: rpc_srv_t *srv = TASK_ARG(task);
667: rpc_cli_t *c = NULL;
668: register int i;
669: socklen_t salen = sizeof(sockaddr_t);
670: #ifdef TCP_NOPUSH
671: int n = 1;
672: #endif
673:
674: /* check free slots for connect */
675: for (i = 0; i < array_Size(srv->srv_blob.clients) &&
676: (c = array(srv->srv_blob.clients, i, rpc_cli_t*)); i++);
677: if (c) /* no more free slots! */
678: goto end;
679: c = e_malloc(sizeof(rpc_cli_t));
680: if (!c) {
681: LOGERR;
682: srv->srv_kill = srv->srv_blob.kill = 1;
683: return NULL;
684: } else {
685: memset(c, 0, sizeof(rpc_cli_t));
686: array_Set(srv->srv_blob.clients, i, c);
687: c->cli_id = i;
688: c->cli_parent = srv;
689: }
690:
691: /* alloc empty buffer */
692: AIT_SET_BUFSIZ(&c->cli_buf, 0, srv->srv_netbuf);
693:
694: /* accept client */
695: c->cli_sock = accept(TASK_FD(task), &c->cli_sa.sa, &salen);
696: if (c->cli_sock == -1) {
697: LOGERR;
698: AIT_FREE_VAL(&c->cli_buf);
699: array_Del(srv->srv_blob.clients, i, 42);
700: goto end;
701: } else {
702: #ifdef TCP_NOPUSH
703: setsockopt(c->cli_sock, IPPROTO_TCP, TCP_NOPUSH, &n, sizeof n);
704: #endif
705: fcntl(c->cli_sock, F_SETFL, fcntl(c->cli_sock, F_GETFL) | O_NONBLOCK);
706: }
707:
708: schedRead(TASK_ROOT(task), rxBLOB, c, c->cli_sock, NULL, 0);
709: end:
710: schedReadSelf(task);
711: return NULL;
712: }
713:
714: /* ------------------------------------------------------ */
715:
716: /*
717: * rpc_srv_initBLOBServer() - Init & create BLOB Server
718: *
719: * @srv = RPC server instance
720: * @Port = Port for bind server, if Port == 0 default port is selected
721: * @diskDir = Disk place for BLOB file objects
722: * return: -1 == error or 0 bind and created BLOB server instance
723: */
724: int
725: rpc_srv_initBLOBServer(rpc_srv_t * __restrict srv, u_short Port, const char *diskDir)
726: {
727: int n = 1;
728:
729: if (!srv || srv->srv_kill) {
730: rpc_SetErr(EINVAL, "Invalid parameters can`t init BLOB server");
731: return -1;
732: }
733:
734: memset(&srv->srv_blob, 0, sizeof srv->srv_blob);
735: if (access(diskDir, R_OK | W_OK) == -1) {
736: LOGERR;
737: return -1;
738: } else
739: AIT_SET_STR(&srv->srv_blob.dir, diskDir);
740:
741: /* init blob list */
742: TAILQ_INIT(&srv->srv_blob.blobs);
743:
744: srv->srv_blob.server.cli_parent = srv;
745:
746: memcpy(&srv->srv_blob.server.cli_sa, &srv->srv_server.cli_sa, sizeof(sockaddr_t));
747: switch (srv->srv_blob.server.cli_sa.sa.sa_family) {
748: case AF_INET:
749: srv->srv_blob.server.cli_sa.sin.sin_port =
750: htons(Port ? Port : ntohs(srv->srv_blob.server.cli_sa.sin.sin_port) + 1);
751: break;
752: case AF_INET6:
753: srv->srv_blob.server.cli_sa.sin6.sin6_port =
754: htons(Port ? Port : ntohs(srv->srv_blob.server.cli_sa.sin6.sin6_port) + 1);
755: break;
756: case AF_LOCAL:
757: strlcat(srv->srv_blob.server.cli_sa.sun.sun_path, ".blob",
758: sizeof srv->srv_blob.server.cli_sa.sun.sun_path);
759: break;
760: default:
761: AIT_FREE_VAL(&srv->srv_blob.dir);
762: return -1;
763: }
764:
765: /* create BLOB server socket */
766: srv->srv_blob.server.cli_sock = socket(srv->srv_server.cli_sa.sa.sa_family, SOCK_STREAM, 0);
767: if (srv->srv_blob.server.cli_sock == -1) {
768: LOGERR;
769: AIT_FREE_VAL(&srv->srv_blob.dir);
770: return -1;
771: }
772: if (setsockopt(srv->srv_blob.server.cli_sock, SOL_SOCKET, SO_REUSEADDR, &n, sizeof n) == -1) {
773: LOGERR;
774: close(srv->srv_blob.server.cli_sock);
775: AIT_FREE_VAL(&srv->srv_blob.dir);
776: return -1;
777: }
778: n = srv->srv_netbuf;
779: if (setsockopt(srv->srv_blob.server.cli_sock, SOL_SOCKET, SO_SNDBUF, &n, sizeof n) == -1) {
780: LOGERR;
781: close(srv->srv_blob.server.cli_sock);
782: AIT_FREE_VAL(&srv->srv_blob.dir);
783: return -1;
784: }
785: if (setsockopt(srv->srv_blob.server.cli_sock, SOL_SOCKET, SO_RCVBUF, &n, sizeof n) == -1) {
786: LOGERR;
787: close(srv->srv_blob.server.cli_sock);
788: AIT_FREE_VAL(&srv->srv_blob.dir);
789: return -1;
790: }
791: if (bind(srv->srv_blob.server.cli_sock, &srv->srv_blob.server.cli_sa.sa,
792: srv->srv_blob.server.cli_sa.sa.sa_len) == -1) {
793: LOGERR;
794: close(srv->srv_blob.server.cli_sock);
795: AIT_FREE_VAL(&srv->srv_blob.dir);
796: return -1;
797: } else
798: fcntl(srv->srv_blob.server.cli_sock, F_SETFL,
799: fcntl(srv->srv_blob.server.cli_sock, F_GETFL) | O_NONBLOCK);
800:
801:
802: /* allocate pool for concurent blob clients */
803: srv->srv_blob.clients = array_Init(array_Size(srv->srv_clients));
804: if (!srv->srv_blob.clients) {
805: rpc_SetErr(elwix_GetErrno(), "%s", elwix_GetError());
806: close(srv->srv_blob.server.cli_sock);
807: AIT_FREE_VAL(&srv->srv_blob.dir);
808: return -1;
809: }
810:
811: /* init blob scheduler */
812: srv->srv_blob.root = schedBegin();
813: if (!srv->srv_blob.root) {
814: rpc_SetErr(sched_GetErrno(), "%s", sched_GetError());
815: array_Destroy(&srv->srv_blob.clients);
816: close(srv->srv_blob.server.cli_sock);
817: AIT_FREE_VAL(&srv->srv_blob.dir);
818: return -1;
819: }
820:
821: return 0;
822: }
823:
824: /*
825: * rpc_srv_endBLOBServer() - Destroy BLOB server, close all opened sockets and free resources
826: *
827: * @srv = RPC Server instance
828: * return: none
829: */
830: void
831: rpc_srv_endBLOBServer(rpc_srv_t * __restrict srv)
832: {
833: if (!srv)
834: return;
835:
836: srv->srv_blob.kill = 1;
837: }
838:
839: /*
840: * rpc_srv_loopBLOBServer() - Execute Main BLOB server loop and wait for clients requests
841: *
842: * @srv = RPC Server instance
843: * return: -1 error or 0 ok, infinite loop ...
844: */
845: int
846: rpc_srv_loopBLOBServer(rpc_srv_t * __restrict srv)
847: {
848: rpc_cli_t *c;
849: register int i;
850: rpc_blob_t *b, *tmp;
851: struct timespec ts = { RPC_SCHED_POLLING, 0 };
852:
853: if (!srv || srv->srv_kill) {
854: rpc_SetErr(EINVAL, "Invalid parameter can`t start BLOB server");
855: return -1;
856: }
857:
858: if (listen(srv->srv_blob.server.cli_sock, array_Size(srv->srv_blob.clients)) == -1) {
859: LOGERR;
860: return -1;
861: }
862:
863: if (!schedRead(srv->srv_blob.root, acceptBLOBClients, srv,
864: srv->srv_blob.server.cli_sock, NULL, 0)) {
865: rpc_SetErr(sched_GetErrno(), "%s", sched_GetError());
866: return -1;
867: }
868:
869: schedPolling(srv->srv_blob.root, &ts, NULL);
870: /* main rpc loop */
871: schedRun(srv->srv_blob.root, &srv->srv_blob.kill);
872:
873: /* close all clients connections & server socket */
874: for (i = 0; i < array_Size(srv->srv_blob.clients); i++) {
875: c = array(srv->srv_blob.clients, i, rpc_cli_t*);
876: if (c) {
877: shutdown(c->cli_sock, SHUT_RDWR);
878: close(c->cli_sock);
879:
880: schedCancelby(srv->srv_blob.root, taskMAX, CRITERIA_ARG, c, NULL);
881: AIT_FREE_VAL(&c->cli_buf);
882: }
883: array_Del(srv->srv_blob.clients, i, 42);
884: }
885: array_Destroy(&srv->srv_blob.clients);
886:
887: close(srv->srv_blob.server.cli_sock);
888:
889: /* detach blobs */
890: TAILQ_FOREACH_SAFE(b, &srv->srv_blob.blobs, blob_node, tmp) {
891: TAILQ_REMOVE(&srv->srv_blob.blobs, b, blob_node);
892:
893: rpc_srv_blobFree(srv, b);
894: e_free(b);
895: }
896:
897: schedEnd(&srv->srv_blob.root);
898: AIT_FREE_VAL(&srv->srv_blob.dir);
899: return 0;
900: }
901:
902:
903: /*
904: * rpc_srv_initServer() - Init & create RPC Server
905: *
906: * @InstID = Instance for authentication & recognition
907: * @concurentClients = Concurent clients at same time to this server
908: * @netBuf = Network buffer length (min:512 bytes), if =0 == BUFSIZ (also meaning max RPC packet)
909: * @csHost = Host name or address for bind server, if NULL any address
910: * @Port = Port for bind server, if Port == 0 default port is selected
911: * @proto = Protocol, if == 0 choose SOCK_STREAM
912: * return: NULL == error or !=NULL bind and created RPC server instance
913: */
914: rpc_srv_t *
915: rpc_srv_initServer(u_char InstID, int concurentClients, int netBuf,
916: const char *csHost, u_short Port, int proto)
917: {
918: int n = 1;
919: rpc_srv_t *srv = NULL;
920: sockaddr_t sa = E_SOCKADDR_INIT;
921:
922: if (!concurentClients || (proto < 0 || proto > SOCK_DGRAM)) {
923: rpc_SetErr(EINVAL, "Invalid parameters can`t init RPC server");
924: return NULL;
925: }
926: if (!e_gethostbyname(csHost, Port, &sa))
927: return NULL;
928: if (!Port)
929: Port = RPC_DEFPORT;
930: if (!proto)
931: proto = SOCK_STREAM;
932: if (netBuf < RPC_MIN_BUFSIZ)
933: netBuf = BUFSIZ;
934: else
935: netBuf = E_ALIGN(netBuf, 2); /* align netBuf length */
936:
937: #ifdef HAVE_SRANDOMDEV
938: srandomdev();
939: #else
940: time_t tim;
941:
942: srandom((time(&tim) ^ getpid()));
943: #endif
944:
945: srv = e_malloc(sizeof(rpc_srv_t));
946: if (!srv) {
947: LOGERR;
948: return NULL;
949: } else
950: memset(srv, 0, sizeof(rpc_srv_t));
951:
952: srv->srv_proto = proto;
953: srv->srv_netbuf = netBuf;
954: srv->srv_session.sess_version = RPC_VERSION;
955: srv->srv_session.sess_instance = InstID;
956:
957: srv->srv_server.cli_parent = srv;
958: memcpy(&srv->srv_server.cli_sa, &sa, sizeof srv->srv_server.cli_sa);
959:
960: /* init functions */
961: pthread_mutex_init(&srv->srv_funcs.mtx, NULL);
962: SLIST_INIT(&srv->srv_funcs);
963: AVL_INIT(&srv->srv_funcs);
964:
965: /* init scheduler */
966: srv->srv_root = schedBegin();
967: if (!srv->srv_root) {
968: rpc_SetErr(sched_GetErrno(), "%s", sched_GetError());
969: pthread_mutex_destroy(&srv->srv_funcs.mtx);
970: e_free(srv);
971: return NULL;
972: }
973:
974: /* init pool for clients */
975: srv->srv_clients = array_Init(concurentClients);
976: if (!srv->srv_clients) {
977: rpc_SetErr(elwix_GetErrno(), "%s", elwix_GetError());
978: schedEnd(&srv->srv_root);
979: pthread_mutex_destroy(&srv->srv_funcs.mtx);
980: e_free(srv);
981: return NULL;
982: }
983:
984: /* create server socket */
985: srv->srv_server.cli_sock = socket(srv->srv_server.cli_sa.sa.sa_family, srv->srv_proto, 0);
986: if (srv->srv_server.cli_sock == -1) {
987: LOGERR;
988: array_Destroy(&srv->srv_clients);
989: schedEnd(&srv->srv_root);
990: pthread_mutex_destroy(&srv->srv_funcs.mtx);
991: e_free(srv);
992: return NULL;
993: }
994: if (setsockopt(srv->srv_server.cli_sock, SOL_SOCKET, SO_REUSEADDR, &n, sizeof n) == -1) {
995: LOGERR;
996: goto err;
997: }
998: n = srv->srv_netbuf;
999: if (setsockopt(srv->srv_server.cli_sock, SOL_SOCKET, SO_SNDBUF, &n, sizeof n) == -1) {
1000: LOGERR;
1001: goto err;
1002: }
1003: if (setsockopt(srv->srv_server.cli_sock, SOL_SOCKET, SO_RCVBUF, &n, sizeof n) == -1) {
1004: LOGERR;
1005: goto err;
1006: }
1007: if (bind(srv->srv_server.cli_sock, &srv->srv_server.cli_sa.sa,
1008: srv->srv_server.cli_sa.sa.sa_len) == -1) {
1009: LOGERR;
1010: goto err;
1011: } else
1012: fcntl(srv->srv_server.cli_sock, F_SETFL,
1013: fcntl(srv->srv_server.cli_sock, F_GETFL) | O_NONBLOCK);
1014:
1015: rpc_register_srvPing(srv);
1016:
1017: return srv;
1018: err: /* error condition */
1019: close(srv->srv_server.cli_sock);
1020: array_Destroy(&srv->srv_clients);
1021: schedEnd(&srv->srv_root);
1022: pthread_mutex_destroy(&srv->srv_funcs.mtx);
1023: e_free(srv);
1024: return NULL;
1025: }
1026:
1027: /*
1028: * rpc_srv_endServer() - Destroy RPC server, close all opened sockets and free resources
1029: *
1030: * @psrv = RPC Server instance
1031: * return: none
1032: */
1033: void
1034: rpc_srv_endServer(rpc_srv_t ** __restrict psrv)
1035: {
1036: if (!psrv || !*psrv)
1037: return;
1038:
1039: /* if send kill to blob server */
1040: if (!(*psrv)->srv_blob.kill)
1041: rpc_srv_endBLOBServer(*psrv);
1042:
1043: (*psrv)->srv_kill = 1;
1044: sleep(RPC_SCHED_POLLING);
1045:
1046: pthread_mutex_destroy(&(*psrv)->srv_funcs.mtx);
1047: e_free(*psrv);
1048: *psrv = NULL;
1049: }
1050:
1051: /*
1052: * rpc_srv_loopServer() - Execute Main server loop and wait for clients requests
1053: *
1054: * @srv = RPC Server instance
1055: * return: -1 error or 0 ok, infinite loop ...
1056: */
1057: int
1058: rpc_srv_loopServer(rpc_srv_t * __restrict srv)
1059: {
1060: rpc_cli_t *c;
1061: register int i;
1062: rpc_func_t *f;
1063: struct timespec ts = { RPC_SCHED_POLLING, 0 };
1064:
1065: if (!srv) {
1066: rpc_SetErr(EINVAL, "Invalid parameter can`t start RPC server");
1067: return -1;
1068: }
1069:
1070: if (srv->srv_proto == SOCK_STREAM)
1071: if (listen(srv->srv_server.cli_sock, array_Size(srv->srv_clients)) == -1) {
1072: LOGERR;
1073: return -1;
1074: }
1075:
1076: if (!schedRead(srv->srv_root, cbProto[srv->srv_proto][CB_ACCEPTCLIENT], srv,
1077: srv->srv_server.cli_sock, NULL, 0)) {
1078: rpc_SetErr(sched_GetErrno(), "%s", sched_GetError());
1079: return -1;
1080: }
1081:
1082: schedPolling(srv->srv_root, &ts, NULL);
1083: /* main rpc loop */
1084: schedRun(srv->srv_root, &srv->srv_kill);
1085:
1086: /* close all clients connections & server socket */
1087: for (i = 0; i < array_Size(srv->srv_clients); i++) {
1088: c = array(srv->srv_clients, i, rpc_cli_t*);
1089: if (c) {
1090: shutdown(c->cli_sock, SHUT_RDWR);
1091: close(c->cli_sock);
1092:
1093: schedCancelby(srv->srv_root, taskMAX, CRITERIA_ARG, c, NULL);
1094: ait_freeVars(&RPC_RETVARS(c));
1095: AIT_FREE_VAL(&c->cli_buf);
1096: }
1097: array_Del(srv->srv_clients, i, 42);
1098: }
1099: array_Destroy(&srv->srv_clients);
1100:
1101: close(srv->srv_server.cli_sock);
1102:
1103: /* detach exported calls */
1104: RPC_FUNCS_LOCK(&srv->srv_funcs);
1105: while ((f = SLIST_FIRST(&srv->srv_funcs))) {
1106: SLIST_REMOVE_HEAD(&srv->srv_funcs, func_next);
1107:
1108: AIT_FREE_VAL(&f->func_name);
1109: e_free(f);
1110: }
1111: srv->srv_funcs.avlh_root = NULL;
1112: RPC_FUNCS_UNLOCK(&srv->srv_funcs);
1113:
1114: schedEnd(&srv->srv_root);
1115: return 0;
1116: }
1117:
1118:
1119: /*
1120: * rpc_srv_execCall() Execute registered call from RPC server
1121: *
1122: * @cli = RPC client
1123: * @rpc = IN RPC call structure
1124: * @funcname = Execute RPC function
1125: * @args = IN RPC calling arguments from RPC client
1126: * return: -1 error, !=-1 ok
1127: */
1128: int
1129: rpc_srv_execCall(rpc_cli_t * __restrict cli, struct tagRPCCall * __restrict rpc,
1130: ait_val_t funcname, array_t * __restrict args)
1131: {
1132: rpc_callback_t func;
1133:
1134: if (!cli || !rpc || !AIT_ADDR(&funcname)) {
1135: rpc_SetErr(EINVAL, "Invalid parameter can`t exec function");
1136: return -1;
1137: }
1138:
1139: func = AIT_GET_LIKE(&funcname, rpc_callback_t);
1140: return func(cli, rpc, args);
1141: }
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