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 1.7.2.7 2012/05/17 15:14:16 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: again:
65: rnd = random() % UINT_MAX;
66:
67: memset(szFName, 0, sizeof szFName);
68: snprintf(szFName, sizeof szFName, BLOB_FILE, AIT_GET_STR(&srv->srv_blob.dir), rnd);
69: f = open(szFName, O_CREAT | O_EXCL | O_RDWR, 0600);
70: if (f == -1) {
71: if (errno == EEXIST)
72: goto again;
73:
74: LOGERR;
75: return NULL;
76: }
77: if (ftruncate(f, len) == -1) {
78: LOGERR;
79: close(f);
80: unlink(szFName);
81: return NULL;
82: }
83:
84: blob = malloc(sizeof(rpc_blob_t));
85: if (!blob) {
86: LOGERR;
87: close(f);
88: unlink(szFName);
89: return NULL;
90: }
91:
92: blob->blob_data = mmap(NULL, len, PROT_READ | PROT_WRITE, MAP_SHARED, f, 0);
93: if (blob->blob_data == MAP_FAILED) {
94: LOGERR;
95: free(blob);
96: close(f);
97: unlink(szFName);
98: return NULL;
99: } else
100: close(f);
101:
102: blob->blob_len = len;
103: blob->blob_var = rnd;
104: return blob;
105: }
106:
107: /*
108: * rpc_srv_blobMap() - Map blob to memory region
109: *
110: * @srv = RPC Server instance
111: * @blob = Map to this BLOB element
112: * return: -1 error or 0 ok
113: */
114: inline int
115: rpc_srv_blobMap(rpc_srv_t * __restrict srv, rpc_blob_t * __restrict blob)
116: {
117: int f;
118: char szFName[MAXPATHLEN];
119:
120: if (!blob) {
121: rpc_SetErr(EINVAL, "Invalid argument BLOB");
122: return -1;
123: }
124: if (blob->blob_data) {
125: rpc_SetErr(EPERM, "Already mmapped object found!");
126: return -1;
127: }
128:
129: memset(szFName, 0, sizeof szFName);
130: snprintf(szFName, sizeof szFName, BLOB_FILE, AIT_GET_STR(&srv->srv_blob.dir), blob->blob_var);
131: f = open(szFName, O_RDWR);
132: if (f == -1) {
133: LOGERR;
134: return -1;
135: }
136:
137: blob->blob_data = mmap(NULL, blob->blob_len, PROT_READ | PROT_WRITE, MAP_SHARED, f, 0);
138: if (blob->blob_data == MAP_FAILED) {
139: LOGERR;
140: close(f);
141: blob->blob_data = NULL;
142: return -1;
143: } else {
144: close(f);
145:
146: madvise(blob->blob_data, blob->blob_len, MADV_SEQUENTIAL);
147: }
148:
149: return 0;
150: }
151:
152: /*
153: * rpc_srv_blobUnmap() - Unmap blob memory region
154: *
155: * @blob = Mapped BLOB element
156: * return: none
157: */
158: inline void
159: rpc_srv_blobUnmap(rpc_blob_t * __restrict blob)
160: {
161: if (blob && blob->blob_data) {
162: munmap(blob->blob_data, blob->blob_len);
163: blob->blob_data = NULL;
164: }
165: }
166:
167: /*
168: * rpc_srv_blobFree() - Free blob from disk & memory
169: *
170: * @srv = RPC Server instance
171: * @blob = Mapped BLOB element
172: * return: -1 error or 0 ok
173: */
174: inline int
175: rpc_srv_blobFree(rpc_srv_t * __restrict srv, rpc_blob_t * __restrict blob)
176: {
177: char szFName[MAXPATHLEN];
178:
179: if (!blob) {
180: rpc_SetErr(EINVAL, "Invalid argument BLOB");
181: return -1;
182: } else
183: rpc_srv_blobUnmap(blob);
184:
185: memset(szFName, 0, sizeof szFName);
186: snprintf(szFName, sizeof szFName, BLOB_FILE, AIT_GET_STR(&srv->srv_blob.dir), blob->blob_var);
187: if (unlink(szFName) == -1) {
188: LOGERR;
189: return -1;
190: }
191:
192: return 0;
193: }
194:
195: /* ------------------------------------------------------------ */
196:
197: /*
198: * rpc_srv_sendBLOB() - Send mapped BLOB to client
199: *
200: * @cli = Client instance
201: * @blob = Mapped BLOB element
202: * return: -1 error, 0 ok
203: */
204: int
205: rpc_srv_sendBLOB(rpc_cli_t * __restrict cli, rpc_blob_t * __restrict blob)
206: {
207: int ret, len;
208: uint8_t *pos;
209:
210: if (!cli || !blob || !blob->blob_data) {
211: rpc_SetErr(EINVAL, "Invalid arguments");
212: return -1;
213: }
214:
215: for (ret = blob->blob_len, pos = blob->blob_data; ret > 0; ret -= len, pos += len) {
216: len = send(cli->cli_sock, pos, ret, MSG_NOSIGNAL);
217: if (len == -1) {
218: LOGERR;
219: return -1;
220: }
221: }
222:
223: return ret;
224: }
225:
226: /*
227: * rpc_srv_recvBLOB() - Receive BLOB from client
228: *
229: * @cli = Client instance
230: * @blob = Mapped BLOB element
231: * return: -1 error, 0 ok, >0 unreceived data from client, may be error?
232: */
233: int
234: rpc_srv_recvBLOB(rpc_cli_t * __restrict cli, rpc_blob_t * __restrict blob)
235: {
236: int ret, len;
237: uint8_t *pos;
238: struct pollfd pfd;
239:
240: if (!cli || !blob || !blob->blob_data) {
241: rpc_SetErr(EINVAL, "Invalid arguments");
242: return -1;
243: }
244:
245: pfd.fd = cli->cli_sock;
246: pfd.events = POLLIN | POLLPRI;
247: for (ret = blob->blob_len, pos = blob->blob_data; ret > 0; ret -= len, pos += len) {
248: if ((len = poll(&pfd, 1, DEF_RPC_TIMEOUT * 1000)) < 1 ||
249: pfd.revents & (POLLERR | POLLHUP | POLLNVAL)) {
250: if (len)
251: LOGERR;
252: else
253: rpc_SetErr(ETIMEDOUT, "Timeout reached! Server not respond");
254: return -1;
255: }
256:
257: len = recv(cli->cli_sock, pos, ret, 0);
258: if (len == -1) {
259: LOGERR;
260: return -1;
261: }
262: }
263:
264: return ret;
265: }
266:
267: /* ------------------------------------------------------------ */
268:
269: /*
270: * rpc_cli_sendBLOB() - Send BLOB to server
271: *
272: * @cli = Client instance
273: * @var = BLOB variable
274: * @data = BLOB data
275: * return: -1 error, 0 ok, 1 remote error
276: */
277: int
278: rpc_cli_sendBLOB(rpc_cli_t * __restrict cli, ait_val_t * __restrict var, void * __restrict data)
279: {
280: int ret, len;
281: uint8_t *pos;
282: struct tagBLOBHdr hdr;
283: struct pollfd pfd;
284:
285: if (!cli || !var || !data) {
286: rpc_SetErr(EINVAL, "Invalid arguments");
287: return -1;
288: } else
289: memset(&hdr, 0, sizeof hdr);
290:
291: rpc_addPktSession(&hdr.hdr_session, cli->cli_parent);
292: hdr.hdr_cmd = set;
293: hdr.hdr_var = 0;
294: hdr.hdr_ret = 0;
295: hdr.hdr_len = htonl(AIT_LEN(var));
296: /* calculate CRC */
297: hdr.hdr_crc ^= hdr.hdr_crc;
298: hdr.hdr_crc = htons(crcFletcher16((u_short*) &hdr, sizeof hdr / 2));
299:
300: /* send SET request */
301: if (send(cli->cli_sock, &hdr, sizeof hdr, MSG_NOSIGNAL) == -1) {
302: LOGERR;
303: return -1;
304: }
305:
306: /* send BLOB to server */
307: for (ret = AIT_LEN(var), pos = data; ret > 0; ret -= len, pos += len)
308: if ((len = send(cli->cli_sock, pos, ret, MSG_NOSIGNAL)) == -1) {
309: LOGERR;
310: return -1;
311: }
312:
313: /* wait for reply */
314: pfd.fd = cli->cli_sock;
315: pfd.events = POLLIN | POLLPRI;
316: if ((ret = poll(&pfd, 1, DEF_RPC_TIMEOUT * 1000)) < 1 ||
317: pfd.revents & (POLLERR | POLLHUP | POLLNVAL)) {
318: if (ret)
319: LOGERR;
320: else
321: rpc_SetErr(ETIMEDOUT, "Timeout reached! Server not respond");
322: return -1;
323: }
324: if (recv(cli->cli_sock, &hdr, sizeof hdr, 0) == -1) {
325: LOGERR;
326: return 1;
327: }
328: /* check CRC */
329: ret = ntohs(hdr.hdr_crc);
330: hdr.hdr_crc ^= hdr.hdr_crc;
331: if (ret != crcFletcher16((u_short*) &hdr, sizeof hdr / 2)) {
332: rpc_SetErr(ERPCMISMATCH, "Bad CRC BLOB packet");
333: return 1;
334: }
335:
336: if (hdr.hdr_cmd != error) {
337: if (ntohl(hdr.hdr_len) != AIT_LEN(var)) {
338: rpc_SetErr(ECANCELED, "Bad return length packet");
339: return 1;
340: }
341:
342: AIT_SET_BLOB(var, ntohl(hdr.hdr_var), ntohl(hdr.hdr_len));
343: }
344:
345: return hdr.hdr_cmd == error;
346: }
347:
348: /*
349: * rpc_cli_recvBLOB() - Receive BLOB from server
350: *
351: * @cli = Client instance
352: * @var = BLOB variable
353: * @data = BLOB data, must be free after use!
354: * return: -1 error, 0 ok, 1 remote error
355: */
356: int
357: rpc_cli_recvBLOB(rpc_cli_t * __restrict cli, ait_val_t * __restrict var, void ** __restrict data)
358: {
359: int ret, len;
360: uint8_t *pos;
361: struct pollfd pfd;
362: struct tagBLOBHdr hdr;
363:
364: if (!cli || !var || !data) {
365: rpc_SetErr(EINVAL, "Invalid arguments");
366: return -1;
367: }
368:
369: *data = malloc(AIT_LEN(var));
370: if (!*data) {
371: LOGERR;
372: return -1;
373: } else {
374: memset(&hdr, 0, sizeof hdr);
375: memset(*data, 0, AIT_LEN(var));
376: }
377:
378: rpc_addPktSession(&hdr.hdr_session, cli->cli_parent);
379: hdr.hdr_cmd = get;
380: hdr.hdr_var = htonl((uint32_t) AIT_GET_BLOB(var));
381: hdr.hdr_ret = 0;
382: hdr.hdr_len = 0;
383: /* calculate CRC */
384: hdr.hdr_crc ^= hdr.hdr_crc;
385: hdr.hdr_crc = htons(crcFletcher16((u_short*) &hdr, sizeof hdr / 2));
386:
387: /* send GET request */
388: if (send(cli->cli_sock, &hdr, sizeof hdr, 0) == -1) {
389: LOGERR;
390: free(*data);
391: *data = NULL;
392: return -1;
393: }
394:
395: /* receive BLOB from server */
396: pfd.fd = cli->cli_sock;
397: pfd.events = POLLIN | POLLPRI;
398: for (ret = AIT_LEN(var), pos = *data; ret > 0; ret -= len, pos += len) {
399: if ((len = poll(&pfd, 1, DEF_RPC_TIMEOUT * 1000)) < 1 ||
400: pfd.revents & (POLLERR | POLLHUP | POLLNVAL)) {
401: LOGERR;
402: free(*data);
403: *data = NULL;
404: return -1;
405: }
406:
407: if ((len = recv(cli->cli_sock, pos, ret, 0)) == -1) {
408: LOGERR;
409: free(*data);
410: *data = NULL;
411: return -1;
412: }
413: }
414:
415: /* wait for reply */
416: if ((len = poll(&pfd, 1, DEF_RPC_TIMEOUT * 1000)) < 1 ||
417: pfd.revents & (POLLERR | POLLHUP | POLLNVAL)) {
418: if (len)
419: LOGERR;
420: else
421: rpc_SetErr(ETIMEDOUT, "Timeout reached! Server not respond");
422: free(*data);
423: *data = NULL;
424: return 1;
425: }
426: if (recv(cli->cli_sock, &hdr, sizeof hdr, 0) == -1) {
427: LOGERR;
428: free(*data);
429: *data = NULL;
430: return 1;
431: }
432: /* check CRC */
433: ret = ntohs(hdr.hdr_crc);
434: hdr.hdr_crc ^= hdr.hdr_crc;
435: if (ret != crcFletcher16((u_short*) &hdr, sizeof hdr / 2)) {
436: rpc_SetErr(ERPCMISMATCH, "Bad CRC BLOB packet");
437: free(*data);
438: *data = NULL;
439: return 1;
440: }
441: if (hdr.hdr_cmd != error) {
442: if (ntohl(hdr.hdr_len) != AIT_LEN(var)) {
443: rpc_SetErr(ECANCELED, "Bad return length packet");
444: free(*data);
445: *data = NULL;
446: return 1;
447: }
448: }
449:
450: return hdr.hdr_cmd == error;
451: }
452:
453: /*
454: * rpc_cli_delBLOB() - Delete BLOB from server
455: *
456: * @cli = Client instance
457: * @var = BLOB variable
458: * return: -1 error, 0 ok, 1 remote error
459: */
460: int
461: rpc_cli_delBLOB(rpc_cli_t * __restrict cli, ait_val_t * __restrict var)
462: {
463: struct tagBLOBHdr hdr;
464: struct pollfd pfd;
465: int ret;
466:
467: if (!cli || !var) {
468: rpc_SetErr(EINVAL, "Invalid arguments");
469: return -1;
470: } else
471: memset(&hdr, 0, sizeof hdr);
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, MSG_NOSIGNAL) == -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, DEF_RPC_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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