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: blob.c,v 1.7.2.2 2012/05/16 08:18:00 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: /*
50: * rpc_srv_blobCreate() - Create and map blob to memory region and return object
51: *
52: * @srv = RPC Server instance
53: * @len = BLOB length object
54: * return: NULL error or !=NULL allocated BLOB object
55: */
56: inline rpc_blob_t *
57: rpc_srv_blobCreate(rpc_srv_t * __restrict srv, int len)
58: {
59: rpc_blob_t *blob = NULL;
60: char szFName[MAXPATHLEN];
61: int f;
62: u_int rnd;
63:
64: #ifdef HAVE_SRANDOMDEV
65: srandomdev();
66: #else
67: time_t tim;
68:
69: srandom((time(&tim) ^ getpid()));
70: #endif
71: again:
72: rnd = random() % UINT_MAX;
73:
74: memset(szFName, 0, sizeof szFName);
75: snprintf(szFName, sizeof szFName, BLOB_FILE, AIT_GET_STR(&srv->srv_blob.dir), rnd);
76: f = open(szFName, O_CREAT | O_EXCL | O_RDWR, 0600);
77: if (f == -1) {
78: if (errno == EEXIST)
79: goto again;
80:
81: LOGERR;
82: return NULL;
83: }
84: if (ftruncate(f, len) == -1) {
85: LOGERR;
86: close(f);
87: unlink(szFName);
88: return NULL;
89: }
90:
91: blob = malloc(sizeof(rpc_blob_t));
92: if (!blob) {
93: LOGERR;
94: close(f);
95: unlink(szFName);
96: return NULL;
97: }
98:
99: blob->blob_data = mmap(NULL, len, PROT_READ | PROT_WRITE, MAP_SHARED, f, 0);
100: if (blob->blob_data == MAP_FAILED) {
101: LOGERR;
102: free(blob);
103: close(f);
104: unlink(szFName);
105: return NULL;
106: } else
107: close(f);
108:
109: blob->blob_len = len;
110: blob->blob_var = rnd;
111: return blob;
112: }
113:
114: /*
115: * rpc_srv_blobMap() - Map blob to memory region
116: *
117: * @srv = RPC Server instance
118: * @blob = Map to this BLOB element
119: * return: -1 error or 0 ok
120: */
121: inline int
122: rpc_srv_blobMap(rpc_srv_t * __restrict srv, rpc_blob_t * __restrict blob)
123: {
124: int f;
125: char szFName[MAXPATHLEN];
126:
127: if (!blob) {
128: rpc_SetErr(EINVAL, "Invalid argument BLOB");
129: return -1;
130: }
131: if (blob->blob_data) {
132: rpc_SetErr(EPERM, "Already mmapped object found!");
133: return -1;
134: }
135:
136: memset(szFName, 0, sizeof szFName);
137: snprintf(szFName, sizeof szFName, BLOB_FILE, AIT_GET_STR(&srv->srv_blob.dir), blob->blob_var);
138: f = open(szFName, O_RDWR);
139: if (f == -1) {
140: LOGERR;
141: return -1;
142: }
143:
144: blob->blob_data = mmap(NULL, blob->blob_len, PROT_READ | PROT_WRITE, MAP_SHARED, f, 0);
145: if (blob->blob_data == MAP_FAILED) {
146: LOGERR;
147: close(f);
148: blob->blob_data = NULL;
149: return -1;
150: } else {
151: close(f);
152:
153: madvise(blob->blob_data, blob->blob_len, MADV_SEQUENTIAL);
154: }
155:
156: return 0;
157: }
158:
159: /*
160: * rpc_srv_blobUnmap() - Unmap blob memory region
161: *
162: * @blob = Mapped BLOB element
163: * return: none
164: */
165: inline void
166: rpc_srv_blobUnmap(rpc_blob_t * __restrict blob)
167: {
168: if (blob && blob->blob_data)
169: munmap(blob->blob_data, blob->blob_len);
170: blob->blob_data = NULL;
171: }
172: }
173:
174: /*
175: * rpc_srv_blobFree() - Free blob from disk & memory
176: *
177: * @srv = RPC Server instance
178: * @blob = Mapped BLOB element
179: * return: -1 error or 0 ok
180: */
181: inline int
182: rpc_srv_blobFree(rpc_srv_t * __restrict srv, rpc_blob_t * __restrict blob)
183: {
184: char szFName[MAXPATHLEN];
185:
186: if (!blob) {
187: rpc_SetErr(EINVAL, "Invalid argument BLOB");
188: return -1;
189: } else
190: rpc_srv_blobUnmap(blob);
191:
192: memset(szFName, 0, sizeof szFName);
193: snprintf(szFName, sizeof szFName, BLOB_FILE, AIT_GET_STR(&srv->srv_blob.dir), blob->blob_var);
194: if (unlink(szFName) == -1) {
195: LOGERR;
196: return -1;
197: }
198:
199: return 0;
200: }
201:
202: /* ------------------------------------------------------------ */
203:
204: /*
205: * rpc_srv_sendBLOB() - Send mapped BLOB to client
206: *
207: * @cli = Client instance
208: * @blob = Mapped BLOB element
209: * return: -1 error, 0 ok
210: */
211: int
212: rpc_srv_sendBLOB(rpc_cli_t * __restrict cli, rpc_blob_t * __restrict blob)
213: {
214: int ret, len;
215: uint8_t *pos;
216:
217: if (!cli || !blob || !blob->blob_data) {
218: rpc_SetErr(EINVAL, "Invalid arguments");
219: return -1;
220: }
221:
222: for (ret = blob->blob_len, pos = blob->blob_data; ret > 0; ret -= len, pos += len) {
223: len = send(cli->cli_sock, pos, ret, MSG_NOSIGNAL);
224: if (len == -1) {
225: LOGERR;
226: return -1;
227: }
228: }
229:
230: return ret;
231: }
232:
233: /*
234: * rpc_srv_recvBLOB() - Receive BLOB from client
235: *
236: * @cli = Client instance
237: * @blob = Mapped BLOB element
238: * return: -1 error, 0 ok, >0 unreceived data from client, may be error?
239: */
240: int
241: rpc_srv_recvBLOB(rpc_cli_t * __restrict cli, rpc_blob_t * __restrict blob)
242: {
243: int ret, len;
244: uint8_t *pos;
245: struct pollfd pfd;
246:
247: if (!cli || !blob || !blob->blob_data) {
248: rpc_SetErr(EINVAL, "Invalid arguments");
249: return -1;
250: }
251:
252: pfd.fd = cli->cli_sock;
253: pfd.events = POLLIN | POLLPRI;
254: for (ret = blob->blob_len, pos = blob->blob_data; ret > 0; ret -= len, pos += len) {
255: if ((len = poll(&pfd, 1, DEF_RPC_TIMEOUT * 1000)) < 1 ||
256: pfd.revents & (POLLERR | POLLHUP | POLLNVAL)) {
257: LOGERR;
258: return -1;
259: }
260:
261: len = recv(cli->cli_sock, pos, ret, 0);
262: if (len == -1) {
263: LOGERR;
264: return -1;
265: }
266: }
267:
268: return ret;
269: }
270:
271: /* ------------------------------------------------------------ */
272:
273: /*
274: * rpc_cli_sendBLOB() - Send BLOB to server
275: *
276: * @cli = Client instance
277: * @var = BLOB variable
278: * @data = BLOB data
279: * return: -1 error, 0 ok, 1 remote error
280: */
281: int
282: rpc_cli_sendBLOB(rpc_cli_t * __restrict cli, ait_val_t * __restrict var, void * __restrict data)
283: {
284: int ret, len;
285: uint8_t *pos;
286: struct tagBLOBHdr hdr;
287: struct pollfd pfd;
288:
289: if (!cli || !var || !data) {
290: rpc_SetErr(EINVAL, "Invalid arguments");
291: return -1;
292: }
293:
294: rpc_addPktSession(&hdr.hdr_session, cli->cli_parent);
295: hdr.hdr_cmd = set;
296: hdr.hdr_var = 0;
297: hdr.hdr_ret = 0;
298: hdr.hdr_len = htonl(AIT_LEN(var));
299: /* calculate CRC */
300: hdr.hdr_crc ^= hdr.hdr_crc;
301: hdr.hdr_crc = htons(crcFletcher16((u_short*) &hdr, sizeof hdr / 2));
302:
303: /* send SET request */
304: if (send(cli->cli_sock, &hdr, sizeof hdr, 0) == -1) {
305: LOGERR;
306: return -1;
307: }
308:
309: /* send BLOB to server */
310: for (ret = AIT_LEN(var), pos = data; ret > 0; ret -= len, pos += len)
311: if ((len = send(cli->cli_sock, pos, ret, 0)) == -1) {
312: LOGERR;
313: return -1;
314: }
315:
316: /* wait for reply */
317: pfd.fd = cli->cli_sock;
318: pfd.events = POLLIN | POLLPRI;
319: if ((ret = poll(&pfd, 1, ((rpc_sess_t*) cli->cli_parent)->sess_timeout * 1000)) < 1 ||
320: pfd.revents & (POLLERR | POLLHUP | POLLNVAL)) {
321: if (ret)
322: LOGERR;
323: else
324: rpc_SetErr(ETIMEDOUT, "Timeout reached! Server not respond");
325: return -1;
326: }
327: if (recv(cli->cli_sock, &hdr, sizeof hdr, 0) == -1) {
328: LOGERR;
329: return 1;
330: }
331: /* check CRC */
332: ret = ntohs(hdr.hdr_crc);
333: hdr.hdr_crc ^= hdr.hdr_crc;
334: if (ret != crcFletcher16((u_short*) &hdr, sizeof hdr / 2)) {
335: rpc_SetErr(ERPCMISMATCH, "Bad CRC BLOB packet");
336: return 1;
337: }
338:
339: if (hdr.hdr_cmd != error) {
340: if (ntohl(hdr.hdr_len) != AIT_LEN(var)) {
341: rpc_SetErr(ECANCELED, "Bad return length packet");
342: return 1;
343: }
344:
345: var->val.blob = ntohl(hdr.hdr_var);
346: }
347:
348: return hdr.hdr_cmd == error;
349: }
350:
351: /*
352: * rpc_cli_recvBLOB() - Receive BLOB from server
353: *
354: * @cli = Client instance
355: * @var = BLOB variable
356: * @data = BLOB data, must be free after use!
357: * return: -1 error, 0 ok, 1 remote error
358: */
359: int
360: rpc_cli_recvBLOB(rpc_cli_t * __restrict cli, ait_val_t * __restrict var, void ** __restrict data)
361: {
362: int ret, len;
363: uint8_t *pos;
364: struct pollfd pfd;
365: struct tagBLOBHdr hdr;
366:
367: if (!cli || !var || !data) {
368: rpc_SetErr(EINVAL, "Invalid arguments");
369: return -1;
370: }
371:
372: *data = malloc(AIT_LEN(var));
373: if (!*data) {
374: LOGERR;
375: return -1;
376: } else
377: memset(*data, 0, AIT_LEN(var));
378:
379: rpc_addPktSession(&hdr.hdr_session, cli->cli_parent);
380: hdr.hdr_cmd = get;
381: hdr.hdr_var = htonl((uint32_t) AIT_GET_BLOB(var));
382: hdr.hdr_ret = 0;
383: hdr.hdr_len = 0;
384: /* calculate CRC */
385: hdr.hdr_crc ^= hdr.hdr_crc;
386: hdr.hdr_crc = htons(crcFletcher16((u_short*) &hdr, sizeof hdr / 2));
387:
388: /* send GET request */
389: if (send(cli->cli_sock, &hdr, sizeof hdr, 0) == -1) {
390: LOGERR;
391: free(*data);
392: *data = NULL;
393: return -1;
394: }
395:
396: /* receive BLOB from server */
397: pfd.fd = cli->cli_sock;
398: pfd.events = POLLIN | POLLPRI;
399: for (ret = AIT_LEN(var), pos = *data; ret > 0; ret -= len, pos += len) {
400: if ((len = poll(&pfd, 1, ((rpc_sess_t*) cli->cli_parent)->sess_timeout * 1000)) < 1 ||
401: pfd.revents & (POLLERR | POLLHUP | POLLNVAL)) {
402: LOGERR;
403: free(*data);
404: *data = NULL;
405: return -1;
406: }
407:
408: if ((len = recv(cli->cli_sock, pos, ret, 0)) == -1) {
409: LOGERR;
410: free(*data);
411: *data = NULL;
412: return -1;
413: }
414: }
415:
416: /* wait for reply */
417: if ((len = poll(&pfd, 1, ((rpc_sess_t*) cli->cli_parent)->sess_timeout * 1000)) < 1 ||
418: pfd.revents & (POLLERR | POLLHUP | POLLNVAL)) {
419: if (len)
420: LOGERR;
421: else
422: rpc_SetErr(ETIMEDOUT, "Timeout reached! Server not respond");
423: free(*data);
424: *data = NULL;
425: return 1;
426: }
427: if (recv(cli->cli_sock, &hdr, sizeof hdr, 0) == -1) {
428: LOGERR;
429: free(*data);
430: *data = NULL;
431: return 1;
432: }
433: /* check CRC */
434: ret = ntohs(hdr.hdr_crc);
435: hdr.hdr_crc ^= hdr.hdr_crc;
436: if (ret != crcFletcher16((u_short*) &hdr, sizeof hdr / 2)) {
437: rpc_SetErr(ERPCMISMATCH, "Bad CRC BLOB packet");
438: free(*data);
439: *data = NULL;
440: return 1;
441: }
442: if (hdr.hdr_cmd != error) {
443: if (ntohl(hdr.hdr_len) != AIT_LEN(var)) {
444: rpc_SetErr(ECANCELED, "Bad return length packet");
445: free(*data);
446: *data = NULL;
447: return 1;
448: }
449: }
450:
451: return hdr.hdr_cmd == error;
452: }
453:
454: /*
455: * rpc_cli_delBLOB() - Delete BLOB from server
456: *
457: * @cli = Client instance
458: * @var = BLOB variable
459: * return: -1 error, 0 ok, 1 remote error
460: */
461: int
462: rpc_cli_delBLOB(rpc_cli_t * __restrict cli, ait_val_t * __restrict var)
463: {
464: struct tagBLOBHdr hdr;
465: struct pollfd pfd;
466: int ret;
467:
468: if (!cli || !var) {
469: rpc_SetErr(EINVAL, "Invalid arguments");
470: return -1;
471: }
472:
473: rpc_addPktSession(&hdr.hdr_session, cli->cli_parent);
474: hdr.hdr_cmd = unset;
475: hdr.hdr_var = htonl((uint32_t) AIT_GET_BLOB(var));
476: hdr.hdr_ret = 0;
477: hdr.hdr_len = 0;
478: /* calculate CRC */
479: hdr.hdr_crc ^= hdr.hdr_crc;
480: hdr.hdr_crc = htons(crcFletcher16((u_short*) &hdr, sizeof hdr / 2));
481:
482: /* send UNSET request */
483: if (send(cli->cli_sock, &hdr, sizeof hdr, 0) == -1) {
484: LOGERR;
485: return -1;
486: }
487:
488: /* wait for reply */
489: pfd.fd = cli->cli_sock;
490: pfd.events = POLLIN | POLLPRI;
491: if ((ret = poll(&pfd, 1, ((rpc_sess_t*) cli->cli_parent)->sess_timeout * 1000)) < 1 ||
492: pfd.revents & (POLLERR | POLLHUP | POLLNVAL)) {
493: if (ret)
494: LOGERR;
495: else
496: rpc_SetErr(ETIMEDOUT, "Timeout reached! Server not respond");
497: return 1;
498: }
499: if (recv(cli->cli_sock, &hdr, sizeof hdr, 0) == -1) {
500: LOGERR;
501: return 1;
502: }
503: /* check CRC */
504: ret = ntohs(hdr.hdr_crc);
505: hdr.hdr_crc ^= hdr.hdr_crc;
506: if (ret != crcFletcher16((u_short*) &hdr, sizeof hdr / 2)) {
507: rpc_SetErr(ERPCMISMATCH, "Bad CRC BLOB packet");
508: return 1;
509: }
510:
511: return hdr.hdr_cmd == error;
512: }
513:
514: /*
515: * rpc_cli_getBLOB() - Receive BLOB from server and Delete after that
516: *
517: * @cli = Client instance
518: * @var = BLOB variable
519: * @data = BLOB data, must be free after use!
520: * return: -1 error, 0 ok, 1 remote error
521: */
522: inline int
523: rpc_cli_getBLOB(rpc_cli_t * __restrict cli, ait_val_t * __restrict var, void ** __restrict data)
524: {
525: int ret;
526:
527: ret = rpc_cli_recvBLOB(cli, var, data);
528: ret |= rpc_cli_delBLOB(cli, var) > 0 ? 2 : 0;
529:
530: return ret;
531: }
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