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 1.17.4.3 2013/08/21 09:42:12 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: static inline u_char *
71: getBuffer(rpc_cli_t * __restrict c)
72: {
73: u_char *b = NULL;
74:
75: assert(c);
76:
77: if (RPC_ISNEXTBUF(c))
78: b = AIT_GET_BUF(array(c->cli_buf, 1, ait_val_t*));
79: else
80: b = AIT_GET_BUF(array(c->cli_buf, 0, ait_val_t*)) +
81: sizeof(struct tagRPCCall);
82:
83: return b;
84: }
85:
86: static inline struct tagRPCCall *
87: getHeader(rpc_cli_t * __restrict c)
88: {
89: assert(c);
90:
91: return (struct tagRPCCall*) AIT_GET_BUF(array(c->cli_buf, 0, ait_val_t*));
92: }
93:
94: void
95: rpc_freeCli(rpc_cli_t * __restrict c)
96: {
97: rpc_srv_t *s = c->cli_parent;
98:
99: schedCancelby(s->srv_root, taskMAX, CRITERIA_ARG, c, NULL);
100:
101: /* free buffer(s) */
102: ait_freeVars(&c->cli_buf);
103:
104: array_Del(s->srv_clients, c->cli_id, 0);
105: if (c)
106: e_free(c);
107: }
108:
109:
110: static inline int
111: _check4freeslot(rpc_srv_t * __restrict srv, sockaddr_t * __restrict sa)
112: {
113: rpc_cli_t *c = NULL;
114: register int i;
115:
116: /* check free slots for connect */
117: for (i = 0; i < array_Size(srv->srv_clients) &&
118: (c = array(srv->srv_clients, i, rpc_cli_t*)); i++)
119: /* check for duplicates */
120: if (sa && !e_addrcmp(&c->cli_sa, sa, 42))
121: break;
122: if (i >= array_Size(srv->srv_clients))
123: return -1; /* no more free slots! */
124:
125: return i;
126: }
127:
128: static rpc_cli_t *
129: _allocClient(rpc_srv_t * __restrict srv, sockaddr_t * __restrict sa)
130: {
131: rpc_cli_t *c = NULL;
132: int n;
133:
134: n = _check4freeslot(srv, sa);
135: if (n == -1)
136: return NULL;
137: else
138: c = array(srv->srv_clients, n, rpc_cli_t*);
139:
140: if (!c) {
141: c = e_malloc(sizeof(rpc_cli_t));
142: if (!c) {
143: LOGERR;
144: srv->srv_kill = 1;
145: return NULL;
146: } else {
147: memset(c, 0, sizeof(rpc_cli_t));
148: array_Set(srv->srv_clients, n, c);
149: c->cli_id = n;
150: c->cli_parent = srv;
151: }
152:
153: /* init buffer(s) */
154: c->cli_buf = ait_allocVars(1);
155: if (!c->cli_buf) {
156: rpc_SetErr(elwix_GetErrno(), "%s", elwix_GetError());
157: array_Del(srv->srv_clients, n, 42);
158: return NULL;
159: } else
160: AIT_SET_BUFSIZ(array(c->cli_buf, 0, ait_val_t*), 0, srv->srv_netbuf);
161: }
162:
163: return c;
164: }
165:
166:
167: static void *
168: freeClient(sched_task_t *task)
169: {
170: rpc_freeCli(TASK_ARG(task));
171:
172: return NULL;
173: }
174:
175: static void *
176: closeClient(sched_task_t *task)
177: {
178: int sock = ((rpc_cli_t*) TASK_ARG(task))->cli_sock;
179:
180: rpc_freeCli(TASK_ARG(task));
181:
182: /* close client socket */
183: shutdown(sock, SHUT_RDWR);
184: close(sock);
185: return NULL;
186: }
187:
188: static void *
189: txPacket(sched_task_t *task)
190: {
191: rpc_cli_t *c = TASK_ARG(task);
192: rpc_srv_t *s = c->cli_parent;
193: rpc_func_t *f = NULL;
194: u_char buf[USHRT_MAX] = { 0 };
195: struct tagRPCCall *rpc = (struct tagRPCCall*) buf;
196: int ret, wlen = sizeof(struct tagRPCCall);
197:
198: /* copy RPC header */
199: memcpy(buf, TASK_DATA(task), wlen);
200:
201: if (rpc->call_argc) {
202: f = rpc_srv_getCall(s, ntohs(rpc->call_tag));
203: if (!f) {
204: rpc_SetErr(EPROGUNAVAIL, "Function not found at RPC server");
205: rpc->call_argc ^= rpc->call_argc;
206: rpc->call_rep.ret = RPC_ERROR(-1);
207: rpc->call_rep.eno = RPC_ERROR(rpc_Errno);
208: } else {
209: rpc->call_argc = htons(array_Size(RPC_RETVARS(c)));
210: /* Go Encapsulate variables */
211: ret = ait_vars2buffer(buf + wlen, sizeof buf - wlen, RPC_RETVARS(c));
212: /* Free return values */
213: ait_freeVars(&c->cli_vars);
214: if (ret == -1) {
215: rpc_SetErr(EBADRPC, "Prepare RPC packet failed");
216: rpc->call_argc ^= rpc->call_argc;
217: rpc->call_rep.ret = RPC_ERROR(-1);
218: rpc->call_rep.eno = RPC_ERROR(rpc_Errno);
219: } else
220: wlen += ret;
221: }
222: }
223:
224: rpc->call_len = htons(wlen);
225:
226: #if 0
227: /* calculate CRC */
228: rpc->call_crc ^= rpc->call_crc;
229: rpc->call_crc = htons(crcFletcher16((u_short*) buf, wlen / 2));
230: #endif
231:
232: /* send reply */
233: ret = send(TASK_FD(task), buf, wlen, MSG_NOSIGNAL);
234: if (ret == -1 || ret != wlen) {
235: /* close connection */
236: schedEvent(TASK_ROOT(task), cbProto[s->srv_proto][CB_CLOSECLIENT],
237: TASK_ARG(task), 0, NULL, 0);
238: }
239:
240: return NULL;
241: }
242:
243: static void *
244: execCall(sched_task_t *task)
245: {
246: rpc_cli_t *c = TASK_ARG(task);
247: rpc_srv_t *s = c->cli_parent;
248: rpc_func_t *f = NULL;
249: array_t *arr = NULL;
250: u_char *buf = getBuffer(c);
251: struct tagRPCCall *rpc = getHeader(c);
252: int argc = ntohs(rpc->call_argc);
253:
254: /* Go decapsulate variables ... */
255: if (argc) {
256: arr = ait_buffer2vars(buf, ntohl(rpc->call_len), argc, 42);
257: if (!arr) {
258: rpc_SetErr(ERPCMISMATCH, "#%d - %s", elwix_GetErrno(), elwix_GetError());
259:
260: rpc->call_argc ^= rpc->call_argc;
261: rpc->call_rep.ret = RPC_ERROR(-1);
262: rpc->call_rep.eno = RPC_ERROR(rpc_Errno);
263: return NULL;
264: }
265: } else
266: arr = NULL;
267:
268: if (!(f = rpc_srv_getCall(s, ntohs(rpc->call_tag)))) {
269: rpc_SetErr(EPROGUNAVAIL, "Function not found at RPC server");
270:
271: rpc->call_argc ^= rpc->call_argc;
272: rpc->call_rep.ret = RPC_ERROR(-1);
273: rpc->call_rep.eno = RPC_ERROR(rpc_Errno);
274: } else {
275: /* if client doesn't want reply */
276: argc = RPC_CHK_NOREPLY(rpc);
277: rpc->call_rep.ret = RPC_ERROR(rpc_srv_execCall(c, rpc, f->func_name, arr));
278: if (rpc->call_rep.ret == htonl(-1)) {
279: rpc->call_rep.eno = RPC_ERROR(errno);
280: rpc->call_argc ^= rpc->call_argc;
281: } else {
282: rpc->call_rep.eno ^= rpc->call_rep.eno;
283: if (argc) {
284: /* without reply */
285: ait_freeVars(&c->cli_vars);
286: rpc->call_argc ^= rpc->call_argc;
287: } else {
288: /* reply */
289: rpc->call_argc = htons(array_Size(RPC_RETVARS(c)));
290: }
291: }
292: }
293:
294: array_Destroy(&arr);
295: return NULL;
296: }
297:
298: static void *
299: rxPacket(sched_task_t *task)
300: {
301: rpc_cli_t *c = TASK_ARG(task);
302: rpc_srv_t *s = c->cli_parent;
303: int len, rlen, noreply;
304: ait_val_t *bufz = array(c->cli_buf, 0, ait_val_t*);
305: u_char *buf = (u_char*) AIT_GET_BUF(bufz);
306: struct tagRPCCall *rpc = (struct tagRPCCall*) buf;
307:
308: memset(buf, 0, AIT_LEN(bufz));
309: /* 1st buffer is last */
310: RPC_CLR_NEXTBUF(c);
311:
312: /* read rpc header */
313: rlen = recv(TASK_FD(task), rpc, MIN(sizeof(struct tagRPCCall), AIT_LEN(bufz)), 0);
314: if (rlen < 1) {
315: /* close connection */
316: schedEvent(TASK_ROOT(task), cbProto[s->srv_proto][CB_CLOSECLIENT],
317: TASK_ARG(task), 0, NULL, 0);
318: return NULL;
319: } else if (rlen < sizeof(struct tagRPCCall) ||
320: ntohl(rpc->call_len) < sizeof(struct tagRPCCall)) {
321: /* close connection */
322: schedEvent(TASK_ROOT(task), cbProto[s->srv_proto][CB_CLOSECLIENT],
323: TASK_ARG(task), 0, NULL, 0);
324: return NULL;
325: } else {
326: buf += sizeof(struct tagRPCCall);
327: len = ntohl(rpc->call_len);
328: }
329:
330: if (len > (AIT_LEN(bufz) - sizeof(struct tagRPCCall))) {
331: /* add extra buffer */
332: if (!(bufz = ait_getVars(&c->cli_buf, 1))) {
333: /* close connection */
334: schedEvent(TASK_ROOT(task), cbProto[s->srv_proto][CB_CLOSECLIENT],
335: TASK_ARG(task), 0, NULL, 0);
336: return NULL;
337: } else {
338: AIT_SET_BUFSIZ(bufz, 0, len);
339: buf = AIT_GET_BUF(bufz);
340: }
341: /* buffer isnt last */
342: RPC_SET_NEXTBUF(c);
343: }
344:
345: /* read payload */
346: rlen = recv(TASK_FD(task), buf, len, 0);
347: if (rlen < len) {
348: /* close connection */
349: schedEvent(TASK_ROOT(task), cbProto[s->srv_proto][CB_CLOSECLIENT],
350: TASK_ARG(task), 0, NULL, 0);
351: return NULL;
352: }
353:
354: noreply = RPC_CHK_NOREPLY(rpc);
355:
356: /* check RPC packet session info */
357: if (rpc_chkPktSession(&rpc->call_session, &s->srv_session)) {
358: rpc_SetErr(ERPCMISMATCH, "Get invalid RPC session");
359:
360: rpc->call_argc ^= rpc->call_argc;
361: rpc->call_rep.ret = RPC_ERROR(-1);
362: rpc->call_rep.eno = RPC_ERROR(errno);
363: } else {
364: /* execute RPC call */
365: schedEvent(TASK_ROOT(task), execCall, TASK_ARG(task), noreply, rpc, len);
366: }
367:
368: /* send RPC reply */
369: if (!noreply)
370: schedWrite(TASK_ROOT(task), cbProto[s->srv_proto][CB_TXPACKET],
371: TASK_ARG(task), TASK_FD(task), rpc, len);
372:
373: /* lets get next packet */
374: schedReadSelf(task);
375: return NULL;
376: }
377:
378: static void *
379: acceptClients(sched_task_t *task)
380: {
381: rpc_srv_t *srv = TASK_ARG(task);
382: rpc_cli_t *c = NULL;
383: socklen_t salen = sizeof(sockaddr_t);
384:
385: c = _allocClient(srv, NULL);
386: if (!c)
387: goto end;
388:
389: /* accept client */
390: c->cli_sock = accept(TASK_FD(task), &c->cli_sa.sa, &salen);
391: if (c->cli_sock == -1) {
392: LOGERR;
393: ait_freeVars(&c->cli_buf);
394: array_Del(srv->srv_clients, c->cli_id, 42);
395: goto end;
396: } else
397: fcntl(c->cli_sock, F_SETFL, fcntl(c->cli_sock, F_GETFL) | O_NONBLOCK);
398:
399: schedRead(TASK_ROOT(task), cbProto[srv->srv_proto][CB_RXPACKET], c,
400: c->cli_sock, NULL, 0);
401: end:
402: schedReadSelf(task);
403: return NULL;
404: }
405:
406:
407: static void *
408: txUDPPacket(sched_task_t *task)
409: {
410: rpc_cli_t *c = TASK_ARG(task);
411: rpc_srv_t *s = c->cli_parent;
412: rpc_func_t *f = NULL;
413: u_char buf[USHRT_MAX] = { 0 };
414: struct tagRPCCall *rpc = (struct tagRPCCall*) buf;
415: int ret, wlen = sizeof(struct tagRPCCall);
416: struct timespec ts = { DEF_RPC_TIMEOUT, 0 };
417:
418: schedCancelby(TASK_ROOT(task), taskTIMER, CRITERIA_DATA, TASK_ARG(task), NULL);
419: schedTimer(TASK_ROOT(task), cbProto[s->srv_proto][CB_CLOSECLIENT],
420: TASK_ARG(task), ts, TASK_ARG(task), 0);
421:
422: /* copy RPC header */
423: memcpy(buf, TASK_DATA(task), wlen);
424:
425: if (rpc->call_argc) {
426: f = rpc_srv_getCall(s, ntohs(rpc->call_tag));
427: if (!f) {
428: rpc_SetErr(EPROGUNAVAIL, "Function not found at RPC server");
429: rpc->call_argc ^= rpc->call_argc;
430: rpc->call_rep.ret = RPC_ERROR(-1);
431: rpc->call_rep.eno = RPC_ERROR(rpc_Errno);
432: } else {
433: rpc->call_argc = htons(array_Size(RPC_RETVARS(c)));
434: /* Go Encapsulate variables */
435: ret = ait_vars2buffer(buf + wlen, sizeof buf - wlen, RPC_RETVARS(c));
436: /* Free return values */
437: ait_freeVars(&c->cli_vars);
438: if (ret == -1) {
439: rpc_SetErr(EBADRPC, "Prepare RPC packet failed");
440: rpc->call_argc ^= rpc->call_argc;
441: rpc->call_rep.ret = RPC_ERROR(-1);
442: rpc->call_rep.eno = RPC_ERROR(rpc_Errno);
443: } else
444: wlen += ret;
445: }
446: }
447:
448: rpc->call_len = htons(wlen);
449:
450: /* calculate CRC */
451: rpc->call_crc ^= rpc->call_crc;
452: rpc->call_crc = htons(crcFletcher16((u_short*) buf, wlen / 2));
453:
454: /* send reply */
455: ret = sendto(TASK_FD(task), buf, wlen, MSG_NOSIGNAL,
456: &c->cli_sa.sa, c->cli_sa.sa.sa_len);
457: if (ret == -1 || ret != wlen) {
458: /* close connection */
459: schedEvent(TASK_ROOT(task), cbProto[s->srv_proto][CB_CLOSECLIENT],
460: TASK_ARG(task), 0, NULL, 0);
461: }
462:
463: return NULL;
464: }
465:
466: static void *
467: rxUDPPacket(sched_task_t *task)
468: {
469: rpc_srv_t *srv = TASK_ARG(task);
470: rpc_cli_t *c = NULL;
471: int len, rlen, noreply;
472: u_short crc, off = 0;
473: u_char buf[USHRT_MAX + 1];
474: struct tagRPCCall *rpc = (struct tagRPCCall*) buf;
475: sockaddr_t sa;
476: socklen_t salen;
477: struct timespec ts = { DEF_RPC_TIMEOUT, 0 };
478:
479: /* receive connect packet */
480: salen = sa.ss.ss_len = sizeof(sockaddr_t);
481: rlen = recvfrom(TASK_FD(task), buf, sizeof buf, 0, &sa.sa, &salen);
482: if (rlen < 1)
483: goto end;
484:
485: c = _allocClient(srv, &sa);
486: if (!c)
487: goto end;
488: else {
489: c->cli_sock = TASK_FD(task);
490: memcpy(&c->cli_sa, &sa, sizeof c->cli_sa);
491: memcpy(AIT_GET_BUF(&c->cli_buf), buf, AIT_LEN(&c->cli_buf));
492: /* armed timer for close stateless connection */
493: schedCancelby(TASK_ROOT(task), taskTIMER, CRITERIA_DATA, c, NULL);
494: schedTimer(TASK_ROOT(task), cbProto[srv->srv_proto][CB_CLOSECLIENT],
495: c, ts, c, 0);
496: }
497:
498: do {
499: /* check RPC packet */
500: if (rlen < sizeof(struct tagRPCCall)) {
501: rpc_SetErr(ERPCMISMATCH, "Short RPC packet");
502: break;
503: } else
504: rpc = (struct tagRPCCall*) (AIT_GET_BUF(&c->cli_buf) + off);
505:
506: len = ntohs(rpc->call_len);
507: rlen -= len;
508:
509: /* check RPC packet lengths */
510: if (rlen < 0 || len < sizeof(struct tagRPCCall)) {
511: rpc_SetErr(ERPCMISMATCH, "Broken RPC packet length");
512: /* skip entire packet */
513: break;
514: }
515:
516: /* check integrity of packet */
517: crc = ntohs(rpc->call_crc);
518: rpc->call_crc ^= rpc->call_crc;
519: if (crc != crcFletcher16((u_short*) rpc, len / 2)) {
520: rpc_SetErr(ERPCMISMATCH, "Bad CRC RPC packet");
521:
522: off += len;
523: /* try next packet remaining into buffer */
524: continue;
525: }
526:
527: noreply = RPC_CHK_NOREPLY(rpc);
528:
529: /* check RPC packet session info */
530: if (rpc_chkPktSession(&rpc->call_session, &srv->srv_session)) {
531: rpc_SetErr(ERPCMISMATCH, "Get invalid RPC session");
532: rpc->call_argc ^= rpc->call_argc;
533: rpc->call_rep.ret = RPC_ERROR(-1);
534: rpc->call_rep.eno = RPC_ERROR(errno);
535: } else {
536: /* execute RPC call */
537: schedEvent(TASK_ROOT(task), execCall, c, off, NULL, 0);
538: }
539:
540: /* send RPC reply */
541: if (!noreply)
542: schedWrite(TASK_ROOT(task), cbProto[srv->srv_proto][CB_TXPACKET],
543: c, TASK_FD(task), rpc, len);
544:
545: off += len;
546: } while (rlen > 0);
547:
548: end:
549: schedReadSelf(task);
550: return NULL;
551: }
552:
553: /* ------------------------------------------------------ */
554:
555: void
556: rpc_freeBLOBCli(rpc_cli_t * __restrict c)
557: {
558: rpc_srv_t *s = c->cli_parent;
559:
560: schedCancelby(s->srv_blob.root, taskMAX, CRITERIA_ARG, c, NULL);
561:
562: /* free buffer(s) */
563: ait_freeVars(&c->cli_buf);
564:
565: array_Del(s->srv_blob.clients, c->cli_id, 0);
566: if (c)
567: e_free(c);
568: }
569:
570:
571: static void *
572: closeBLOBClient(sched_task_t *task)
573: {
574: int sock = ((rpc_cli_t*) TASK_ARG(task))->cli_sock;
575:
576: rpc_freeBLOBCli(TASK_ARG(task));
577:
578: /* close client socket */
579: shutdown(sock, SHUT_RDWR);
580: close(sock);
581: return NULL;
582: }
583:
584: static void *
585: txBLOB(sched_task_t *task)
586: {
587: rpc_cli_t *c = TASK_ARG(task);
588: u_char *buf = AIT_GET_BUF(&c->cli_buf);
589: int wlen = sizeof(struct tagBLOBHdr);
590:
591: /* send reply */
592: wlen = send(TASK_FD(task), buf, wlen, MSG_NOSIGNAL);
593: if (wlen == -1 || wlen != sizeof(struct tagBLOBHdr)) {
594: /* close blob connection */
595: schedEvent(TASK_ROOT(task), closeBLOBClient, c, 42, NULL, 0);
596: }
597:
598: return NULL;
599: }
600:
601: static void *
602: rxBLOB(sched_task_t *task)
603: {
604: rpc_cli_t *c = TASK_ARG(task);
605: rpc_srv_t *s = c->cli_parent;
606: rpc_blob_t *b;
607: struct tagBLOBHdr blob;
608: int rlen;
609:
610: memset(&blob, 0, sizeof blob);
611: rlen = recv(TASK_FD(task), &blob, sizeof blob, 0);
612: if (rlen < 1) {
613: /* close blob connection */
614: schedEvent(TASK_ROOT(task), closeBLOBClient, c, 42, NULL, 0);
615: return NULL;
616: }
617:
618: /* check BLOB packet */
619: if (rlen < sizeof(struct tagBLOBHdr)) {
620: rpc_SetErr(ERPCMISMATCH, "Short BLOB packet");
621:
622: schedReadSelf(task);
623: return NULL;
624: }
625:
626: /* check RPC packet session info */
627: if (rpc_chkPktSession(&blob.hdr_session, &s->srv_session)) {
628: rpc_SetErr(ERPCMISMATCH, "Get invalid RPC session");
629: blob.hdr_cmd = error;
630: goto end;
631: }
632:
633: /* Go to proceed packet ... */
634: switch (blob.hdr_cmd) {
635: case get:
636: if (!(b = rpc_srv_getBLOB(s, ntohl(blob.hdr_var)))) {
637: rpc_SetErr(EINVAL, "Var=%x not found", ntohl(blob.hdr_var));
638: blob.hdr_cmd = no;
639: blob.hdr_ret = RPC_ERROR(-1);
640: break;
641: } else
642: blob.hdr_len = htonl(b->blob_len);
643:
644: if (rpc_srv_blobMap(s, b) != -1) {
645: /* deliver BLOB variable to client */
646: blob.hdr_ret = htonl(rpc_srv_sendBLOB(c, b));
647: rpc_srv_blobUnmap(b);
648: } else {
649: blob.hdr_cmd = error;
650: blob.hdr_ret = RPC_ERROR(-1);
651: }
652: break;
653: case set:
654: if ((b = rpc_srv_registerBLOB(s, ntohl(blob.hdr_len),
655: ntohl(blob.hdr_ret)))) {
656: /* set new BLOB variable for reply :) */
657: blob.hdr_var = htonl(b->blob_var);
658:
659: /* receive BLOB from client */
660: blob.hdr_ret = htonl(rpc_srv_recvBLOB(c, b));
661: rpc_srv_blobUnmap(b);
662: } else {
663: blob.hdr_cmd = error;
664: blob.hdr_ret = RPC_ERROR(-1);
665: }
666: break;
667: case unset:
668: if (rpc_srv_unregisterBLOB(s, ntohl(blob.hdr_var)) == -1) {
669: blob.hdr_cmd = error;
670: blob.hdr_ret = RPC_ERROR(-1);
671: }
672: break;
673: default:
674: rpc_SetErr(EPROCUNAVAIL, "Unsupported BLOB command %d", blob.hdr_cmd);
675: blob.hdr_cmd = error;
676: blob.hdr_ret = RPC_ERROR(-1);
677: }
678:
679: end:
680: memcpy(AIT_ADDR(&c->cli_buf), &blob, sizeof blob);
681: schedWrite(TASK_ROOT(task), txBLOB, TASK_ARG(task), TASK_FD(task), NULL, 0);
682: schedReadSelf(task);
683: return NULL;
684: }
685:
686: static void *
687: flushBLOB(sched_task_t *task)
688: {
689: rpc_srv_t *srv = TASK_ARG(task);
690: rpc_blob_t *b, *tmp;
691:
692: TAILQ_FOREACH_SAFE(b, &srv->srv_blob.blobs, blob_node, tmp) {
693: TAILQ_REMOVE(&srv->srv_blob.blobs, b, blob_node);
694:
695: rpc_srv_blobFree(srv, b);
696: e_free(b);
697: }
698:
699: schedSignalSelf(task);
700: return NULL;
701: }
702:
703: static void *
704: acceptBLOBClients(sched_task_t *task)
705: {
706: rpc_srv_t *srv = TASK_ARG(task);
707: rpc_cli_t *c = NULL;
708: register int i;
709: socklen_t salen = sizeof(sockaddr_t);
710: #ifdef TCP_NOPUSH
711: int n = 1;
712: #endif
713:
714: /* check free slots for connect */
715: for (i = 0; i < array_Size(srv->srv_blob.clients) &&
716: (c = array(srv->srv_blob.clients, i, rpc_cli_t*)); i++);
717: if (c) /* no more free slots! */
718: goto end;
719: c = e_malloc(sizeof(rpc_cli_t));
720: if (!c) {
721: LOGERR;
722: srv->srv_kill = srv->srv_blob.kill = 1;
723: return NULL;
724: } else {
725: memset(c, 0, sizeof(rpc_cli_t));
726: array_Set(srv->srv_blob.clients, i, c);
727: c->cli_id = i;
728: c->cli_parent = srv;
729: }
730:
731: /* init buffer(s) */
732: c->cli_buf = ait_allocVars(1);
733: if (!c->cli_buf) {
734: rpc_SetErr(elwix_GetErrno(), "%s", elwix_GetError());
735: array_Del(srv->srv_blob.clients, i, 42);
736: goto end;
737: } else
738: AIT_SET_BUFSIZ(array(c->cli_buf, 0, ait_val_t*), 0, srv->srv_netbuf);
739:
740: /* accept client */
741: c->cli_sock = accept(TASK_FD(task), &c->cli_sa.sa, &salen);
742: if (c->cli_sock == -1) {
743: LOGERR;
744: ait_freeVars(&c->cli_buf);
745: array_Del(srv->srv_blob.clients, i, 42);
746: goto end;
747: } else {
748: #ifdef TCP_NOPUSH
749: setsockopt(c->cli_sock, IPPROTO_TCP, TCP_NOPUSH, &n, sizeof n);
750: #endif
751: fcntl(c->cli_sock, F_SETFL, fcntl(c->cli_sock, F_GETFL) | O_NONBLOCK);
752: }
753:
754: schedRead(TASK_ROOT(task), rxBLOB, c, c->cli_sock, NULL, 0);
755: end:
756: schedReadSelf(task);
757: return NULL;
758: }
759:
760: /* ------------------------------------------------------ */
761:
762: /*
763: * rpc_srv_initBLOBServer() - Init & create BLOB Server
764: *
765: * @srv = RPC server instance
766: * @Port = Port for bind server, if Port == 0 default port is selected
767: * @diskDir = Disk place for BLOB file objects
768: * return: -1 == error or 0 bind and created BLOB server instance
769: */
770: int
771: rpc_srv_initBLOBServer(rpc_srv_t * __restrict srv, u_short Port, const char *diskDir)
772: {
773: int n = 1;
774:
775: if (!srv || srv->srv_kill) {
776: rpc_SetErr(EINVAL, "Invalid parameters can`t init BLOB server");
777: return -1;
778: }
779:
780: memset(&srv->srv_blob, 0, sizeof srv->srv_blob);
781: if (access(diskDir, R_OK | W_OK) == -1) {
782: LOGERR;
783: return -1;
784: } else
785: AIT_SET_STR(&srv->srv_blob.dir, diskDir);
786:
787: /* init blob list */
788: TAILQ_INIT(&srv->srv_blob.blobs);
789:
790: srv->srv_blob.server.cli_parent = srv;
791:
792: memcpy(&srv->srv_blob.server.cli_sa, &srv->srv_server.cli_sa, sizeof(sockaddr_t));
793: switch (srv->srv_blob.server.cli_sa.sa.sa_family) {
794: case AF_INET:
795: srv->srv_blob.server.cli_sa.sin.sin_port =
796: htons(Port ? Port : ntohs(srv->srv_blob.server.cli_sa.sin.sin_port) + 1);
797: break;
798: case AF_INET6:
799: srv->srv_blob.server.cli_sa.sin6.sin6_port =
800: htons(Port ? Port : ntohs(srv->srv_blob.server.cli_sa.sin6.sin6_port) + 1);
801: break;
802: case AF_LOCAL:
803: strlcat(srv->srv_blob.server.cli_sa.sun.sun_path, ".blob",
804: sizeof srv->srv_blob.server.cli_sa.sun.sun_path);
805: break;
806: default:
807: AIT_FREE_VAL(&srv->srv_blob.dir);
808: return -1;
809: }
810:
811: /* create BLOB server socket */
812: srv->srv_blob.server.cli_sock = socket(srv->srv_server.cli_sa.sa.sa_family, SOCK_STREAM, 0);
813: if (srv->srv_blob.server.cli_sock == -1) {
814: LOGERR;
815: AIT_FREE_VAL(&srv->srv_blob.dir);
816: return -1;
817: }
818: if (setsockopt(srv->srv_blob.server.cli_sock, SOL_SOCKET, SO_REUSEADDR, &n, sizeof n) == -1) {
819: LOGERR;
820: close(srv->srv_blob.server.cli_sock);
821: AIT_FREE_VAL(&srv->srv_blob.dir);
822: return -1;
823: }
824: n = srv->srv_netbuf;
825: if (setsockopt(srv->srv_blob.server.cli_sock, SOL_SOCKET, SO_SNDBUF, &n, sizeof n) == -1) {
826: LOGERR;
827: close(srv->srv_blob.server.cli_sock);
828: AIT_FREE_VAL(&srv->srv_blob.dir);
829: return -1;
830: }
831: if (setsockopt(srv->srv_blob.server.cli_sock, SOL_SOCKET, SO_RCVBUF, &n, sizeof n) == -1) {
832: LOGERR;
833: close(srv->srv_blob.server.cli_sock);
834: AIT_FREE_VAL(&srv->srv_blob.dir);
835: return -1;
836: }
837: if (bind(srv->srv_blob.server.cli_sock, &srv->srv_blob.server.cli_sa.sa,
838: srv->srv_blob.server.cli_sa.sa.sa_len) == -1) {
839: LOGERR;
840: close(srv->srv_blob.server.cli_sock);
841: AIT_FREE_VAL(&srv->srv_blob.dir);
842: return -1;
843: } else
844: fcntl(srv->srv_blob.server.cli_sock, F_SETFL,
845: fcntl(srv->srv_blob.server.cli_sock, F_GETFL) | O_NONBLOCK);
846:
847:
848: /* allocate pool for concurent blob clients */
849: srv->srv_blob.clients = array_Init(array_Size(srv->srv_clients));
850: if (!srv->srv_blob.clients) {
851: rpc_SetErr(elwix_GetErrno(), "%s", elwix_GetError());
852: close(srv->srv_blob.server.cli_sock);
853: AIT_FREE_VAL(&srv->srv_blob.dir);
854: return -1;
855: }
856:
857: /* init blob scheduler */
858: srv->srv_blob.root = schedBegin();
859: if (!srv->srv_blob.root) {
860: rpc_SetErr(sched_GetErrno(), "%s", sched_GetError());
861: array_Destroy(&srv->srv_blob.clients);
862: close(srv->srv_blob.server.cli_sock);
863: AIT_FREE_VAL(&srv->srv_blob.dir);
864: return -1;
865: }
866:
867: return 0;
868: }
869:
870: /*
871: * rpc_srv_endBLOBServer() - Destroy BLOB server, close all opened sockets and free resources
872: *
873: * @srv = RPC Server instance
874: * return: none
875: */
876: void
877: rpc_srv_endBLOBServer(rpc_srv_t * __restrict srv)
878: {
879: if (!srv)
880: return;
881:
882: srv->srv_blob.kill = 1;
883:
884: schedEnd(&srv->srv_blob.root);
885: }
886:
887: /*
888: * rpc_srv_loopBLOBServer() - Execute Main BLOB server loop and wait for clients requests
889: *
890: * @srv = RPC Server instance
891: * return: -1 error or 0 ok, infinite loop ...
892: */
893: int
894: rpc_srv_loopBLOBServer(rpc_srv_t * __restrict srv)
895: {
896: rpc_cli_t *c;
897: register int i;
898: rpc_blob_t *b, *tmp;
899: struct timespec ts = { RPC_SCHED_POLLING, 0 };
900:
901: if (!srv || srv->srv_kill) {
902: rpc_SetErr(EINVAL, "Invalid parameter can`t start BLOB server");
903: return -1;
904: }
905:
906: if (listen(srv->srv_blob.server.cli_sock, array_Size(srv->srv_blob.clients)) == -1) {
907: LOGERR;
908: return -1;
909: }
910:
911: schedSignal(srv->srv_blob.root, flushBLOB, srv, SIGFBLOB, NULL, 0);
912: if (!schedRead(srv->srv_blob.root, acceptBLOBClients, srv,
913: srv->srv_blob.server.cli_sock, NULL, 0)) {
914: rpc_SetErr(sched_GetErrno(), "%s", sched_GetError());
915: return -1;
916: }
917:
918: schedPolling(srv->srv_blob.root, &ts, NULL);
919: /* main rpc loop */
920: schedRun(srv->srv_blob.root, &srv->srv_blob.kill);
921:
922: /* detach blobs */
923: TAILQ_FOREACH_SAFE(b, &srv->srv_blob.blobs, blob_node, tmp) {
924: TAILQ_REMOVE(&srv->srv_blob.blobs, b, blob_node);
925:
926: rpc_srv_blobFree(srv, b);
927: e_free(b);
928: }
929:
930: /* close all clients connections & server socket */
931: for (i = 0; i < array_Size(srv->srv_blob.clients); i++) {
932: c = array(srv->srv_blob.clients, i, rpc_cli_t*);
933: if (c) {
934: shutdown(c->cli_sock, SHUT_RDWR);
935: close(c->cli_sock);
936:
937: schedCancelby(srv->srv_blob.root, taskMAX, CRITERIA_ARG, c, NULL);
938: ait_freeVars(&c->cli_buf);
939: }
940: array_Del(srv->srv_blob.clients, i, 42);
941: }
942: array_Destroy(&srv->srv_blob.clients);
943:
944: close(srv->srv_blob.server.cli_sock);
945:
946: AIT_FREE_VAL(&srv->srv_blob.dir);
947: return 0;
948: }
949:
950:
951: /*
952: * rpc_srv_initServer() - Init & create RPC Server
953: *
954: * @InstID = Instance for authentication & recognition
955: * @concurentClients = Concurent clients at same time to this server
956: * @netBuf = Network buffer length (min:512 bytes), if =0 == BUFSIZ (also meaning max RPC packet)
957: * @csHost = Host name or address for bind server, if NULL any address
958: * @Port = Port for bind server, if Port == 0 default port is selected
959: * @proto = Protocol, if == 0 choose SOCK_STREAM
960: * return: NULL == error or !=NULL bind and created RPC server instance
961: */
962: rpc_srv_t *
963: rpc_srv_initServer(u_char InstID, int concurentClients, int netBuf,
964: const char *csHost, u_short Port, int proto)
965: {
966: int n = 1;
967: rpc_srv_t *srv = NULL;
968: sockaddr_t sa = E_SOCKADDR_INIT;
969:
970: if (!concurentClients || (proto < 0 || proto > SOCK_DGRAM)) {
971: rpc_SetErr(EINVAL, "Invalid parameters can`t init RPC server");
972: return NULL;
973: }
974: if (!e_gethostbyname(csHost, Port, &sa))
975: return NULL;
976: if (!Port)
977: Port = RPC_DEFPORT;
978: if (!proto)
979: proto = SOCK_STREAM;
980: if (netBuf < RPC_MIN_BUFSIZ)
981: netBuf = BUFSIZ;
982: else
983: netBuf = E_ALIGN(netBuf, 2); /* align netBuf length */
984:
985: #ifdef HAVE_SRANDOMDEV
986: srandomdev();
987: #else
988: time_t tim;
989:
990: srandom((time(&tim) ^ getpid()));
991: #endif
992:
993: srv = e_malloc(sizeof(rpc_srv_t));
994: if (!srv) {
995: LOGERR;
996: return NULL;
997: } else
998: memset(srv, 0, sizeof(rpc_srv_t));
999:
1000: srv->srv_proto = proto;
1001: srv->srv_netbuf = netBuf;
1002: srv->srv_session.sess_version = RPC_VERSION;
1003: srv->srv_session.sess_instance = InstID;
1004:
1005: srv->srv_server.cli_parent = srv;
1006: memcpy(&srv->srv_server.cli_sa, &sa, sizeof srv->srv_server.cli_sa);
1007:
1008: /* init functions */
1009: pthread_mutex_init(&srv->srv_funcs.mtx, NULL);
1010: SLIST_INIT(&srv->srv_funcs);
1011: AVL_INIT(&srv->srv_funcs);
1012:
1013: /* init scheduler */
1014: srv->srv_root = schedBegin();
1015: if (!srv->srv_root) {
1016: rpc_SetErr(sched_GetErrno(), "%s", sched_GetError());
1017: pthread_mutex_destroy(&srv->srv_funcs.mtx);
1018: e_free(srv);
1019: return NULL;
1020: }
1021:
1022: /* init pool for clients */
1023: srv->srv_clients = array_Init(concurentClients);
1024: if (!srv->srv_clients) {
1025: rpc_SetErr(elwix_GetErrno(), "%s", elwix_GetError());
1026: schedEnd(&srv->srv_root);
1027: pthread_mutex_destroy(&srv->srv_funcs.mtx);
1028: e_free(srv);
1029: return NULL;
1030: }
1031:
1032: /* create server socket */
1033: srv->srv_server.cli_sock = socket(srv->srv_server.cli_sa.sa.sa_family, srv->srv_proto, 0);
1034: if (srv->srv_server.cli_sock == -1) {
1035: LOGERR;
1036: array_Destroy(&srv->srv_clients);
1037: schedEnd(&srv->srv_root);
1038: pthread_mutex_destroy(&srv->srv_funcs.mtx);
1039: e_free(srv);
1040: return NULL;
1041: }
1042: if (setsockopt(srv->srv_server.cli_sock, SOL_SOCKET, SO_REUSEADDR, &n, sizeof n) == -1) {
1043: LOGERR;
1044: goto err;
1045: }
1046: n = srv->srv_netbuf;
1047: if (setsockopt(srv->srv_server.cli_sock, SOL_SOCKET, SO_SNDBUF, &n, sizeof n) == -1) {
1048: LOGERR;
1049: goto err;
1050: }
1051: if (setsockopt(srv->srv_server.cli_sock, SOL_SOCKET, SO_RCVBUF, &n, sizeof n) == -1) {
1052: LOGERR;
1053: goto err;
1054: }
1055: if (bind(srv->srv_server.cli_sock, &srv->srv_server.cli_sa.sa,
1056: srv->srv_server.cli_sa.sa.sa_len) == -1) {
1057: LOGERR;
1058: goto err;
1059: } else
1060: fcntl(srv->srv_server.cli_sock, F_SETFL,
1061: fcntl(srv->srv_server.cli_sock, F_GETFL) | O_NONBLOCK);
1062:
1063: rpc_register_srvPing(srv);
1064:
1065: return srv;
1066: err: /* error condition */
1067: close(srv->srv_server.cli_sock);
1068: array_Destroy(&srv->srv_clients);
1069: schedEnd(&srv->srv_root);
1070: pthread_mutex_destroy(&srv->srv_funcs.mtx);
1071: e_free(srv);
1072: return NULL;
1073: }
1074:
1075: /*
1076: * rpc_srv_endServer() - Destroy RPC server, close all opened sockets and free resources
1077: *
1078: * @psrv = RPC Server instance
1079: * return: none
1080: */
1081: void
1082: rpc_srv_endServer(rpc_srv_t ** __restrict psrv)
1083: {
1084: if (!psrv || !*psrv)
1085: return;
1086:
1087: /* if send kill to blob server */
1088: rpc_srv_endBLOBServer(*psrv);
1089:
1090: (*psrv)->srv_kill = 1;
1091: sleep(RPC_SCHED_POLLING);
1092:
1093: schedEnd(&(*psrv)->srv_root);
1094:
1095: pthread_mutex_destroy(&(*psrv)->srv_funcs.mtx);
1096: e_free(*psrv);
1097: *psrv = NULL;
1098: }
1099:
1100: /*
1101: * rpc_srv_loopServer() - Execute Main server loop and wait for clients requests
1102: *
1103: * @srv = RPC Server instance
1104: * return: -1 error or 0 ok, infinite loop ...
1105: */
1106: int
1107: rpc_srv_loopServer(rpc_srv_t * __restrict srv)
1108: {
1109: rpc_cli_t *c;
1110: register int i;
1111: rpc_func_t *f;
1112: struct timespec ts = { RPC_SCHED_POLLING, 0 };
1113:
1114: if (!srv) {
1115: rpc_SetErr(EINVAL, "Invalid parameter can`t start RPC server");
1116: return -1;
1117: }
1118:
1119: if (srv->srv_proto == SOCK_STREAM)
1120: if (listen(srv->srv_server.cli_sock, array_Size(srv->srv_clients)) == -1) {
1121: LOGERR;
1122: return -1;
1123: }
1124:
1125: if (!schedRead(srv->srv_root, cbProto[srv->srv_proto][CB_ACCEPTCLIENT], srv,
1126: srv->srv_server.cli_sock, NULL, 0)) {
1127: rpc_SetErr(sched_GetErrno(), "%s", sched_GetError());
1128: return -1;
1129: }
1130:
1131: schedPolling(srv->srv_root, &ts, NULL);
1132: /* main rpc loop */
1133: schedRun(srv->srv_root, &srv->srv_kill);
1134:
1135: /* close all clients connections & server socket */
1136: for (i = 0; i < array_Size(srv->srv_clients); i++) {
1137: c = array(srv->srv_clients, i, rpc_cli_t*);
1138: if (c) {
1139: shutdown(c->cli_sock, SHUT_RDWR);
1140: close(c->cli_sock);
1141:
1142: schedCancelby(srv->srv_root, taskMAX, CRITERIA_ARG, c, NULL);
1143: ait_freeVars(&RPC_RETVARS(c));
1144: ait_freeVars(&c->cli_buf);
1145: }
1146: array_Del(srv->srv_clients, i, 42);
1147: }
1148: array_Destroy(&srv->srv_clients);
1149:
1150: close(srv->srv_server.cli_sock);
1151:
1152: /* detach exported calls */
1153: RPC_FUNCS_LOCK(&srv->srv_funcs);
1154: while ((f = SLIST_FIRST(&srv->srv_funcs))) {
1155: SLIST_REMOVE_HEAD(&srv->srv_funcs, func_next);
1156:
1157: AIT_FREE_VAL(&f->func_name);
1158: e_free(f);
1159: }
1160: srv->srv_funcs.avlh_root = NULL;
1161: RPC_FUNCS_UNLOCK(&srv->srv_funcs);
1162:
1163: return 0;
1164: }
1165:
1166:
1167: /*
1168: * rpc_srv_execCall() Execute registered call from RPC server
1169: *
1170: * @cli = RPC client
1171: * @rpc = IN RPC call structure
1172: * @funcname = Execute RPC function
1173: * @args = IN RPC calling arguments from RPC client
1174: * return: -1 error, !=-1 ok
1175: */
1176: int
1177: rpc_srv_execCall(rpc_cli_t * __restrict cli, struct tagRPCCall * __restrict rpc,
1178: ait_val_t funcname, array_t * __restrict args)
1179: {
1180: rpc_callback_t func;
1181:
1182: if (!cli || !rpc || !AIT_ADDR(&funcname)) {
1183: rpc_SetErr(EINVAL, "Invalid parameter can`t exec function");
1184: return -1;
1185: }
1186:
1187: func = AIT_GET_LIKE(&funcname, rpc_callback_t);
1188: return func(cli, rpc, args);
1189: }
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