Annotation of libaitio/src/sock.c, revision 1.4.4.17
1.2 misho 1: /*************************************************************************
2: * (C) 2013 AITNET ltd - Sofia/Bulgaria - <misho@aitnet.org>
3: * by Michael Pounov <misho@elwix.org>
4: *
5: * $Author: misho $
1.4.4.17! misho 6: * $Id: sock.c,v 1.4.4.16 2013/11/22 10:37:44 misho Exp $
1.2 misho 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:
1.4.4.4 misho 49: static void *
50: io_closeClient(sched_task_t *task)
51: {
52: sock_cli_t *cli = (sock_cli_t*) TASK_ARG(task);
53: sock_t *s = (sock_t*) cli->cli_parent;
1.4.4.12 misho 54: int stat, sock = (int) TASK_DATLEN(task);
1.4.4.4 misho 55:
56: pthread_mutex_lock(&s->sock_mtx);
57: TAILQ_REMOVE(&s->sock_cli, cli, cli_node);
58: pthread_mutex_unlock(&s->sock_mtx);
59:
1.4.4.7 misho 60: schedCancelby(s->sock_root, taskMAX, CRITERIA_ARG, cli, NULL);
61:
1.4.4.4 misho 62: if (s->sock_type == SOCK_STREAM) {
63: shutdown(sock, SHUT_RDWR);
64: close(sock);
65: }
1.4.4.5 misho 66: AIT_FREE_VAL(&cli->cli_buf[1]);
67: AIT_FREE_VAL(&cli->cli_buf[0]);
1.4.4.4 misho 68:
1.4.4.17! misho 69: if (cli->cli_pid > 0) {
! 70: kill(cli->cli_pid, SIGTERM);
! 71: while (waitpid(cli->cli_pid, &stat, WNOHANG) > 0) {
1.4.4.12 misho 72: usleep(1000);
1.4.4.17! misho 73: kill(cli->cli_pid, SIGTERM);
1.4.4.12 misho 74: }
75: }
76:
1.4.4.4 misho 77: e_free(cli);
78: taskExit(task, NULL);
79: }
80:
81: static void *
82: io_acceptClient(sched_task_t *task)
83: {
84: int c, rlen;
85: sockaddr_t sa;
86: socklen_t salen = sizeof sa.ss;
87: sock_cli_t *cli = NULL;
88: sock_t *s = (sock_t*) TASK_ARG(task);
89:
90: if (s->sock_type == SOCK_STREAM) {
91: if ((c = accept(TASK_FD(task), &sa.sa, &salen)) == -1) {
92: LOGERR;
93: goto end;
94: }
95: } else {
96: if ((rlen = recvfrom(TASK_FD(task),
97: AIT_GET_BUF(&s->sock_buf), AIT_LEN(&s->sock_buf),
98: MSG_PEEK, &sa.sa, &salen)) == -1) {
99: LOGERR;
100: goto end;
101: } else
102: c = TASK_FD(task);
103: }
104:
105: cli = e_malloc(sizeof(sock_cli_t));
106: if (!cli) {
107: io_SetErr(elwix_GetErrno(), "%s", elwix_GetError());
108: if (s->sock_type == SOCK_STREAM)
109: close(c);
110: goto end;
111: } else {
112: memset(cli, 0, sizeof(sock_cli_t));
113: pthread_mutex_lock(&s->sock_mtx);
114: TAILQ_INSERT_TAIL(&s->sock_cli, cli, cli_node);
115: pthread_mutex_unlock(&s->sock_mtx);
116: }
117:
118: cli->cli_parent = TASK_ARG(task);
119: cli->cli_fd = c;
120: cli->cli_func = TASK_DATA(task);
121: memcpy(&cli->cli_addr, &sa, sizeof cli->cli_addr);
1.4.4.5 misho 122: AIT_SET_BUFSIZ(&cli->cli_buf[0], 0, AIT_LEN(&s->sock_buf));
123: AIT_SET_BUFSIZ(&cli->cli_buf[1], 0, AIT_LEN(&s->sock_buf));
1.4.4.4 misho 124:
125: schedRead(TASK_ROOT(task), cli->cli_func, cli, cli->cli_fd, TASK_ARG(task), 0);
1.4.4.12 misho 126: ioUpdTimerSocket(cli, NULL);
1.4.4.4 misho 127: end:
128: schedReadSelf(task);
129: taskExit(task, NULL);
130: }
131:
1.4.4.7 misho 132: static void *
1.4.4.9 misho 133: io_txNet(sched_task_t *task)
134: {
1.4.4.12 misho 135: int wlen;
1.4.4.9 misho 136: sock_cli_t *cli = TASK_ARG(task);
137: sock_t *s = (sock_t*) cli->cli_parent;
138:
1.4.4.17! misho 139: ioUpdTimerSocket(cli, NULL);
1.4.4.15 misho 140:
1.4.4.9 misho 141: if (s->sock_type == SOCK_STREAM)
142: wlen = send(TASK_FD(task), TASK_DATA(task), TASK_DATLEN(task), 0);
143: else
144: wlen = sendto(TASK_FD(task), TASK_DATA(task), TASK_DATLEN(task), 0,
145: &cli->cli_addr.sa, cli->cli_addr.sa.sa_len);
1.4.4.12 misho 146: if (wlen < 1)
147: schedEvent(TASK_ROOT(task), io_closeClient, cli, 0,
148: (void*) cli->cli_func, cli->cli_fd);
1.4.4.9 misho 149:
150: taskExit(task, NULL);
151: }
152:
153: static void *
154: io_txPty(sched_task_t *task)
155: {
1.4.4.12 misho 156: int wlen;
1.4.4.9 misho 157: sock_cli_t *cli = TASK_ARG(task);
158:
1.4.4.17! misho 159: ioUpdTimerSocket(cli, NULL);
! 160:
1.4.4.9 misho 161: wlen = write(TASK_FD(task), TASK_DATA(task), TASK_DATLEN(task));
1.4.4.12 misho 162: if (wlen < 1)
163: schedEvent(TASK_ROOT(task), io_closeClient, cli, 0,
164: (void*) cli->cli_func, cli->cli_fd);
1.4.4.9 misho 165:
166: taskExit(task, NULL);
167: }
168:
169: static void *
170: io_rxNet(sched_task_t *task)
171: {
1.4.4.12 misho 172: int rlen;
1.4.4.9 misho 173: sock_cli_t *cli = TASK_ARG(task);
174: sock_t *s = (sock_t*) cli->cli_parent;
175: sockaddr_t sa;
176: socklen_t salen = sizeof sa.ss;
177:
1.4.4.17! misho 178: ioUpdTimerSocket(cli, NULL);
1.4.4.15 misho 179:
1.4.4.9 misho 180: if (s->sock_type == SOCK_STREAM)
181: rlen = recv(TASK_FD(task), AIT_GET_BUF(&cli->cli_buf[0]),
182: AIT_LEN(&cli->cli_buf[0]), 0);
183: else {
184: rlen = recvfrom(TASK_FD(task), AIT_GET_BUF(&cli->cli_buf[0]),
185: AIT_LEN(&cli->cli_buf[0]), 0, &sa.sa, &salen);
186: if (e_addrcmp(&cli->cli_addr, &sa, 42))
187: goto end;
188: }
1.4.4.12 misho 189: if (rlen < 1)
190: schedEvent(TASK_ROOT(task), io_closeClient, cli, 0,
191: (void*) cli->cli_func, cli->cli_fd);
192: else
1.4.4.14 misho 193: schedEvent(TASK_ROOT(task), io_txPty, cli, cli->cli_pty,
1.4.4.9 misho 194: AIT_GET_BUF(&cli->cli_buf[0]), rlen);
195: end:
196: schedReadSelf(task);
197: taskExit(task, NULL);
198: }
199:
200: static void *
201: io_rxPty(sched_task_t *task)
202: {
1.4.4.12 misho 203: int rlen;
1.4.4.9 misho 204: sock_cli_t *cli = TASK_ARG(task);
205:
1.4.4.17! misho 206: ioUpdTimerSocket(cli, NULL);
1.4.4.15 misho 207:
1.4.4.9 misho 208: rlen = read(TASK_FD(task), AIT_GET_BUF(&cli->cli_buf[1]), AIT_LEN(&cli->cli_buf[1]));
1.4.4.12 misho 209: if (rlen < 1)
210: schedEvent(TASK_ROOT(task), io_closeClient, cli, 0,
211: (void*) cli->cli_func, cli->cli_fd);
212: else
1.4.4.14 misho 213: schedEvent(TASK_ROOT(task), io_txNet, cli, cli->cli_fd,
1.4.4.9 misho 214: AIT_GET_BUF(&cli->cli_buf[1]), rlen);
215:
216: schedReadSelf(task);
217: taskExit(task, NULL);
218: }
219:
220: static void *
1.4.4.8 misho 221: io_bridgeClient(sched_task_t *task)
1.4.4.7 misho 222: {
1.4.4.8 misho 223: int c, rlen;
224: pid_t pid;
225: sockaddr_t sa;
226: socklen_t salen = sizeof sa.ss;
227: sock_cli_t *cli = NULL;
228: sock_t *s = (sock_t*) TASK_ARG(task);
229: array_t *args = NULL;
230: char **argv = NULL;
231:
232: if (s->sock_type == SOCK_STREAM) {
233: if ((c = accept(TASK_FD(task), &sa.sa, &salen)) == -1) {
234: LOGERR;
235: goto end;
236: }
237: } else {
238: if ((rlen = recvfrom(TASK_FD(task),
239: AIT_GET_BUF(&s->sock_buf), AIT_LEN(&s->sock_buf),
240: MSG_PEEK, &sa.sa, &salen)) == -1) {
241: LOGERR;
242: goto end;
243: } else
244: c = TASK_FD(task);
245: }
246:
247: cli = e_malloc(sizeof(sock_cli_t));
248: if (!cli) {
249: io_SetErr(elwix_GetErrno(), "%s", elwix_GetError());
250: if (s->sock_type == SOCK_STREAM)
251: close(c);
252: goto end;
253: } else {
254: memset(cli, 0, sizeof(sock_cli_t));
255: pthread_mutex_lock(&s->sock_mtx);
256: TAILQ_INSERT_TAIL(&s->sock_cli, cli, cli_node);
257: pthread_mutex_unlock(&s->sock_mtx);
258: }
259:
260: cli->cli_parent = TASK_ARG(task);
261: cli->cli_fd = c;
262: strlcpy(cli->cli_cmdline, TASK_DATA(task), sizeof cli->cli_cmdline);
263: memcpy(&cli->cli_addr, &sa, sizeof cli->cli_addr);
264: AIT_SET_BUFSIZ(&cli->cli_buf[0], 0, AIT_LEN(&s->sock_buf));
265: AIT_SET_BUFSIZ(&cli->cli_buf[1], 0, AIT_LEN(&s->sock_buf));
266:
267: switch ((pid = ioForkPTY(&cli->cli_pty, cli->cli_name, sizeof cli->cli_name,
268: NULL, NULL, NULL))) {
269: case -1:
270: ELIBERR(io);
271: break;
272: case 0:
273: array_Args(cli->cli_cmdline, 0, " \t", &args);
274: argv = array_To(args);
275: array_Destroy(&args);
276:
1.4.4.16 misho 277: printf("Console %s\n", cli->cli_name);
1.4.4.8 misho 278: execv(*argv, argv);
279: break;
280: default:
1.4.4.17! misho 281: cli->cli_pid = pid;
1.4.4.10 misho 282:
1.4.4.9 misho 283: schedRead(TASK_ROOT(task), io_rxPty, cli, cli->cli_pty,
284: TASK_ARG(task), 0);
285: schedRead(TASK_ROOT(task), io_rxNet, cli, cli->cli_fd,
286: TASK_ARG(task), 0);
1.4.4.17! misho 287: ioUpdTimerSocket(cli, NULL);
1.4.4.8 misho 288: break;
289: }
290: end:
291: schedReadSelf(task);
1.4.4.7 misho 292: taskExit(task, NULL);
293: }
294:
1.4.4.4 misho 295:
1.2 misho 296: /*
297: * ioInitSocket() - Init socket and allocate resources
298: *
299: * @role = Socket role
300: * @type = Socket type
301: * @proto = Socket protocol
302: * @addr = Bind to address
303: * @port = Bind to port
304: * @buflen = Socket buffer, optional if =0 == BUFSIZ
305: * return: NULL error or !=NULL created socket
306: */
307: sock_t *
308: ioInitSocket(int role, int type, int proto, const char *addr, u_short port, size_t buflen)
309: {
310: sock_t *s = NULL;
311: int n = 1;
312:
313: if (!addr)
314: return NULL;
315:
316: s = e_malloc(sizeof(sock_t));
317: if (!s) {
318: io_SetErr(elwix_GetErrno(), "%s", elwix_GetError());
319: return NULL;
320: } else
321: memset(s, 0, sizeof(sock_t));
322:
1.3 misho 323: TAILQ_INIT(&s->sock_cli);
324:
1.2 misho 325: s->sock_role = role;
326: s->sock_type = type;
327: s->sock_proto = proto;
328: if (!e_gethostbyname(addr, port, &s->sock_addr)) {
329: io_SetErr(elwix_GetErrno(), "%s", elwix_GetError());
330: e_free(s);
331: return NULL;
332: } else {
333: buflen = buflen ? buflen : BUFSIZ;
1.4.4.1 misho 334: buflen = E_ALIGN(buflen, 2); /* align buflen length */
1.2 misho 335: AIT_SET_BUFSIZ(&s->sock_buf, 0, buflen);
336: }
337:
338: s->sock_fd = socket(s->sock_addr.sa.sa_family, s->sock_type, s->sock_proto);
339: if (s->sock_fd == -1) {
340: LOGERR;
341: AIT_FREE_VAL(&s->sock_buf);
342: e_free(s);
343: return NULL;
344: }
345: if (setsockopt(s->sock_fd, SOL_SOCKET, SO_SNDBUF, &buflen, sizeof buflen) == -1) {
346: LOGERR;
347: AIT_FREE_VAL(&s->sock_buf);
348: e_free(s);
349: return NULL;
350: }
351: if (setsockopt(s->sock_fd, SOL_SOCKET, SO_RCVBUF, &buflen, sizeof buflen) == -1) {
352: LOGERR;
353: AIT_FREE_VAL(&s->sock_buf);
354: e_free(s);
355: return NULL;
356: }
357: if (setsockopt(s->sock_fd, SOL_SOCKET, SO_REUSEADDR, &n, sizeof n) == -1) {
358: LOGERR;
359: AIT_FREE_VAL(&s->sock_buf);
360: e_free(s);
361: return NULL;
362: }
363: if (bind(s->sock_fd, &s->sock_addr.sa, s->sock_addr.sa.sa_len) == -1) {
364: LOGERR;
365: AIT_FREE_VAL(&s->sock_buf);
366: e_free(s);
367: return NULL;
368: }
369:
1.4.4.1 misho 370: s->sock_root = schedBegin();
371: if (!s->sock_root) {
372: io_SetErr(sched_GetErrno(), "%s", sched_GetError());
373: AIT_FREE_VAL(&s->sock_buf);
374: e_free(s);
375: return NULL;
376: }
377:
1.3 misho 378: pthread_mutex_init(&s->sock_mtx, NULL);
1.2 misho 379: return s;
380: }
381:
382: /*
383: * ioCloseSocket() - Close socket and free resources
384: *
385: * @s = Socket
386: * return: none
387: */
388: void
389: ioCloseSocket(sock_t ** __restrict s)
390: {
1.4.4.4 misho 391: sock_cli_t *cli;
1.4.4.17! misho 392: int stat;
1.3 misho 393:
1.2 misho 394: if (s && *s) {
1.3 misho 395: pthread_mutex_lock(&(*s)->sock_mtx);
396: while ((cli = TAILQ_FIRST(&(*s)->sock_cli))) {
397: TAILQ_REMOVE(&(*s)->sock_cli, cli, cli_node);
1.4.4.4 misho 398:
1.4.4.7 misho 399: schedCancelby((*s)->sock_root, taskMAX, CRITERIA_ARG, cli, NULL);
1.4.4.4 misho 400:
401: if ((*s)->sock_type == SOCK_STREAM) {
402: shutdown(cli->cli_fd, SHUT_RDWR);
403: close(cli->cli_fd);
404: }
1.4.4.5 misho 405: AIT_FREE_VAL(&cli->cli_buf[1]);
406: AIT_FREE_VAL(&cli->cli_buf[0]);
1.4.4.17! misho 407:
! 408: if (cli->cli_pid > 0) {
! 409: kill(cli->cli_pid, SIGTERM);
! 410: while (waitpid(cli->cli_pid, &stat, WNOHANG) > 0) {
! 411: usleep(1000);
! 412: kill(cli->cli_pid, SIGTERM);
! 413: }
! 414: }
! 415:
1.3 misho 416: e_free(cli);
417: }
418: pthread_mutex_unlock(&(*s)->sock_mtx);
419:
1.2 misho 420: shutdown((*s)->sock_fd, SHUT_RDWR);
421: close((*s)->sock_fd);
422:
423: AIT_FREE_VAL(&(*s)->sock_buf);
1.3 misho 424:
1.4.4.1 misho 425: schedEnd(&(*s)->sock_root);
426:
1.3 misho 427: pthread_mutex_destroy(&(*s)->sock_mtx);
1.2 misho 428: e_free(*s);
429: *s = NULL;
430: }
431: }
432:
433: /*
434: * ioUpSocket() - Setup socket for use
435: *
436: * @s = Socket
437: * @arg = Server role = listen backlog queue and Client role = peer address
1.4.4.1 misho 438: * @timeout = Socket timeout in sec (default -1 infinit)
1.2 misho 439: * return: -1 error or 0 ok
440: */
441: int
1.4.4.1 misho 442: ioUpSocket(sock_t * __restrict s, void *arg, int timeout)
1.2 misho 443: {
444: int ret = 0;
445: sockaddr_t *peer = (sockaddr_t*) arg;
446: uintptr_t backlog = (uintptr_t) arg;
447:
448: if (!s || !arg)
449: return -1;
1.4.4.1 misho 450: else {
451: s->sock_timeout.tv_sec = timeout;
452: s->sock_timeout.tv_nsec = (timeout < 1) ? timeout : 0;
453: schedPolling(s->sock_root, &s->sock_timeout, NULL);
454: }
1.2 misho 455:
456: switch (s->sock_role) {
457: case IO_SOCK_ROLE_CLIENT:
458: memcpy(&s->sock_peer, peer, sizeof s->sock_peer);
459:
460: if (connect(s->sock_fd, &s->sock_peer.sa,
461: s->sock_peer.sa.sa_len) == -1) {
462: LOGERR;
463: return -1;
464: }
465: break;
466: case IO_SOCK_ROLE_SERVER:
467: if (s->sock_type == SOCK_STREAM) {
468: s->sock_backq = backlog;
469:
470: if (listen(s->sock_fd, s->sock_backq) == -1) {
471: LOGERR;
472: return -1;
473: }
474: }
475: break;
476: default:
477: io_SetErr(EINVAL, "Unsupported socket type");
478: return -1;
479: }
480:
481: fcntl(s->sock_fd, F_SETFL, fcntl(s->sock_fd, F_GETFL) | O_NONBLOCK);
482: return ret;
483: }
1.3 misho 484:
485: /*
1.4.4.2 misho 486: * ioUpdTimerSocket() - Update timeout of socket
1.3 misho 487: *
1.4.4.2 misho 488: * @c = Client socket
1.4.4.12 misho 489: * @arg = Optional data argument
1.4.4.2 misho 490: * return: none
1.3 misho 491: */
1.4.4.2 misho 492: void
1.4.4.12 misho 493: ioUpdTimerSocket(sock_cli_t * __restrict c, void *arg)
1.3 misho 494: {
1.4.4.2 misho 495: sock_t *s;
1.3 misho 496:
1.4.4.2 misho 497: if (!c)
498: return;
499: else
500: s = c->cli_parent;
1.3 misho 501:
1.4.4.2 misho 502: schedCancelby(s->sock_root, taskTIMER, CRITERIA_DATLEN, (void*) c->cli_fd, NULL);
1.4.4.12 misho 503: schedTimer(s->sock_root, io_closeClient, c, s->sock_timeout, arg, c->cli_fd);
1.4.4.2 misho 504: }
1.3 misho 505:
1.4.4.2 misho 506: /*
1.4.4.6 misho 507: * ioCloseClient() - Close client socket
508: *
509: * @c = Client socket
510: * return: 0 ok or !=0 error
511: */
512: int
513: ioCloseClient(sock_cli_t * __restrict c)
514: {
515: sock_t *s;
516:
517: if (!c)
518: return -1;
519: else
520: s = c->cli_parent;
521:
522: return !schedEvent(s->sock_root, io_closeClient, c, 0, NULL, c->cli_fd);
523: }
524:
525: /*
1.4.4.2 misho 526: * ioLoopSocket() - Start socket scheduler
527: *
528: * @s = Socket
529: * @rcb = Read callback
530: * return: -1 error or return result from scheduler
531: */
532: int
533: ioLoopSocket(sock_t * __restrict s, sched_task_func_t rcb)
534: {
1.4.4.6 misho 535: if (!s || !rcb || s->sock_kill)
536: return -1;
537:
1.4.4.2 misho 538: schedRead(s->sock_root, io_acceptClient, s, s->sock_fd, rcb, 0);
539: return schedRun(s->sock_root, &s->sock_kill);
1.3 misho 540: }
1.4.4.3 misho 541:
542: /*
1.4.4.6 misho 543: * ioBridgeProg2Socket() - Start socket scheduler and bridge program to socket
1.4.4.3 misho 544: *
1.4.4.6 misho 545: * @s = Socket
546: * @prgname = Program name
1.4.4.3 misho 547: * return: 0 ok or !=0 error
548: */
549: int
1.4.4.6 misho 550: ioBridgeProg2Socket(sock_t * __restrict s, const char *prgname)
1.4.4.3 misho 551: {
1.4.4.6 misho 552: if (!s || !prgname || s->sock_kill)
1.4.4.3 misho 553: return -1;
554:
1.4.4.8 misho 555: schedRead(s->sock_root, io_bridgeClient, s, s->sock_fd, (void*) prgname, 0);
556: return schedRun(s->sock_root, &s->sock_kill);
1.4.4.3 misho 557: }
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