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 1.13.2.1 2013/07/15 13:32:15 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: /*
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: 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_STRZ(&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 = e_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: e_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: 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_STRZ(&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: 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: 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_STRZ(&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:
297: /* send SET request */
298: pfd.fd = cli->cli_sock;
299: pfd.events = POLLOUT;
300: if ((ret = poll(&pfd, 1, DEF_RPC_TIMEOUT * 1000)) == -1 ||
301: pfd.revents & (POLLERR | POLLHUP | POLLNVAL)) {
302: LOGERR;
303: return -1;
304: }
305: if (send(cli->cli_sock, &hdr, sizeof hdr, MSG_NOSIGNAL) == -1) {
306: LOGERR;
307: return -1;
308: }
309:
310: /* send BLOB to server */
311: for (ret = AIT_LEN(var), pos = data; ret > 0; ret -= len, pos += len)
312: if ((len = send(cli->cli_sock, pos, ret, MSG_NOSIGNAL)) == -1) {
313: LOGERR;
314: return -1;
315: }
316:
317: /* wait for reply */
318: pfd.events = POLLIN | POLLPRI;
319: if ((ret = poll(&pfd, 1, DEF_RPC_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:
332: if (hdr.hdr_cmd != error) {
333: AIT_SET_BLOB(var, ntohl(hdr.hdr_var), ntohl(hdr.hdr_len));
334:
335: if (ntohl(hdr.hdr_len) != AIT_LEN(var)) {
336: rpc_cli_delBLOB(cli, var);
337: AIT_NEW_BLOB(var, ntohl(hdr.hdr_len));
338:
339: rpc_SetErr(ECANCELED, "Bad return length packet");
340: return 1;
341: }
342: }
343:
344: return hdr.hdr_cmd == error;
345: }
346:
347: /*
348: * rpc_cli_recvBLOB() - Receive BLOB from server
349: *
350: * @cli = Client instance
351: * @var = BLOB variable
352: * @data = BLOB data, must be e_free after use!
353: * return: -1 error, 0 ok, 1 remote error
354: */
355: int
356: rpc_cli_recvBLOB(rpc_cli_t * __restrict cli, ait_val_t * __restrict var, void ** __restrict data)
357: {
358: int ret, len;
359: uint8_t *pos;
360: struct pollfd pfd;
361: struct tagBLOBHdr hdr;
362:
363: if (!cli || !var || !data) {
364: rpc_SetErr(EINVAL, "Invalid arguments");
365: return -1;
366: }
367:
368: *data = e_malloc(AIT_LEN(var));
369: if (!*data) {
370: LOGERR;
371: return -1;
372: } else {
373: memset(&hdr, 0, sizeof hdr);
374: memset(*data, 0, AIT_LEN(var));
375: }
376:
377: rpc_addPktSession(&hdr.hdr_session, cli->cli_parent);
378: hdr.hdr_cmd = get;
379: hdr.hdr_var = htonl((uint32_t) AIT_GET_BLOB(var));
380: hdr.hdr_ret = 0;
381: hdr.hdr_len = 0;
382:
383: /* send GET request */
384: pfd.fd = cli->cli_sock;
385: pfd.events = POLLOUT;
386: if ((ret = poll(&pfd, 1, DEF_RPC_TIMEOUT * 1000)) == -1 ||
387: pfd.revents & (POLLERR | POLLHUP | POLLNVAL)) {
388: LOGERR;
389: e_free(*data);
390: *data = NULL;
391: return -1;
392: }
393: if (send(cli->cli_sock, &hdr, sizeof hdr, 0) == -1) {
394: LOGERR;
395: e_free(*data);
396: *data = NULL;
397: return -1;
398: }
399:
400: /* receive BLOB from server */
401: pfd.events = POLLIN | POLLPRI;
402: for (ret = AIT_LEN(var), pos = *data; ret > 0; ret -= len, pos += len) {
403: if ((len = poll(&pfd, 1, DEF_RPC_TIMEOUT * 1000)) < 1 ||
404: pfd.revents & (POLLERR | POLLHUP | POLLNVAL)) {
405: LOGERR;
406: e_free(*data);
407: *data = NULL;
408: return -1;
409: }
410:
411: if ((len = recv(cli->cli_sock, pos, ret, 0)) == -1) {
412: LOGERR;
413: e_free(*data);
414: *data = NULL;
415: return -1;
416: }
417: }
418:
419: /* wait for reply */
420: if ((len = poll(&pfd, 1, DEF_RPC_TIMEOUT * 1000)) < 1 ||
421: pfd.revents & (POLLERR | POLLHUP | POLLNVAL)) {
422: if (len)
423: LOGERR;
424: else
425: rpc_SetErr(ETIMEDOUT, "Timeout reached! Server not respond");
426: e_free(*data);
427: *data = NULL;
428: return 1;
429: }
430: if (recv(cli->cli_sock, &hdr, sizeof hdr, 0) == -1) {
431: LOGERR;
432: e_free(*data);
433: *data = NULL;
434: return 1;
435: }
436: if (hdr.hdr_cmd != error) {
437: if (ntohl(hdr.hdr_len) != AIT_LEN(var)) {
438: rpc_SetErr(ECANCELED, "Bad return length packet");
439: e_free(*data);
440: *data = NULL;
441: return 1;
442: }
443: }
444:
445: return hdr.hdr_cmd == error;
446: }
447:
448: /*
449: * rpc_cli_delBLOB() - Delete BLOB from server
450: *
451: * @cli = Client instance
452: * @var = BLOB variable
453: * return: -1 error, 0 ok, 1 remote error
454: */
455: int
456: rpc_cli_delBLOB(rpc_cli_t * __restrict cli, ait_val_t * __restrict var)
457: {
458: struct tagBLOBHdr hdr;
459: struct pollfd pfd;
460: int ret;
461:
462: if (!cli || !var) {
463: rpc_SetErr(EINVAL, "Invalid arguments");
464: return -1;
465: } else
466: memset(&hdr, 0, sizeof hdr);
467:
468: rpc_addPktSession(&hdr.hdr_session, cli->cli_parent);
469: hdr.hdr_cmd = unset;
470: hdr.hdr_var = htonl((uint32_t) AIT_GET_BLOB(var));
471: hdr.hdr_ret = 0;
472: hdr.hdr_len = 0;
473:
474: /* send UNSET request */
475: pfd.fd = cli->cli_sock;
476: pfd.events = POLLOUT;
477: if ((ret = poll(&pfd, 1, DEF_RPC_TIMEOUT * 1000)) == -1 ||
478: pfd.revents & (POLLERR | POLLHUP | POLLNVAL)) {
479: LOGERR;
480: return -1;
481: }
482: if (send(cli->cli_sock, &hdr, sizeof hdr, MSG_NOSIGNAL) == -1) {
483: LOGERR;
484: return -1;
485: }
486:
487: /* wait for reply */
488: pfd.events = POLLIN | POLLPRI;
489: if ((ret = poll(&pfd, 1, DEF_RPC_TIMEOUT * 1000)) < 1 ||
490: pfd.revents & (POLLERR | POLLHUP | POLLNVAL)) {
491: if (ret)
492: LOGERR;
493: else
494: rpc_SetErr(ETIMEDOUT, "Timeout reached! Server not respond");
495: return 1;
496: }
497: if (recv(cli->cli_sock, &hdr, sizeof hdr, 0) == -1) {
498: LOGERR;
499: return 1;
500: }
501:
502: return hdr.hdr_cmd == error;
503: }
504:
505: /*
506: * rpc_cli_getBLOB() - Receive BLOB from server and Delete after that
507: *
508: * @cli = Client instance
509: * @var = BLOB variable
510: * @data = BLOB data, must be e_free after use!
511: * return: -1 error, 0 ok, 1 remote error
512: */
513: int
514: rpc_cli_getBLOB(rpc_cli_t * __restrict cli, ait_val_t * __restrict var, void ** __restrict data)
515: {
516: int ret;
517:
518: ret = rpc_cli_recvBLOB(cli, var, data);
519: ret |= rpc_cli_delBLOB(cli, var) > 0 ? 2 : 0;
520:
521: return ret;
522: }
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