Annotation of libaitio/src/sess.c, revision 1.5
1.2 misho 1: /*************************************************************************
2: * (C) 2008 AITNET ltd - Sofia/Bulgaria - <misho@aitbg.com>
3: * by Michael Pounov <misho@openbsd-bg.org>
4: *
5: * $Author: misho $
1.5 ! misho 6: * $Id: sess.c,v 1.4.34.1 2014/02/05 02:24:28 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:
1.5 ! misho 15: Copyright 2004 - 2014
1.2 misho 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: * sess_initSession() - Initializing session structure,
51: * if session file not exists creating with specified tech
52: *
53: * @id = Technology using in session. SHARED_IPC IPC tech or SHARED_MAP BSD MemoryMap tech
54: * @csFName = Session filename for build key and identified
55: * @Sess = Session item, if =NULL allocate memory for session after use must be free!
56: * return: 0 OK new key created, -1 error: no memory or file not created, 1 OK key finded
57: */
58: int
1.3 misho 59: sess_initSession(int id, const char *csFName, sess_t ** __restrict Sess)
1.2 misho 60: {
61: int h, ret = 0;
62: char szStr[STRSIZ];
63:
64: if (!csFName) {
65: io_SetErr(EINVAL, "Filename is NULL");
66: return -1;
67: }
68: if (id < SHARED_UNKNOWN || id > SHARED_MAP) {
69: io_SetErr(EPROTONOSUPPORT, "Session type not supported");
70: return -1;
71: }
72:
73: if (!*Sess) {
1.3 misho 74: *Sess = e_malloc(sizeof(sess_t));
1.2 misho 75: if (!*Sess) {
76: LOGERR;
77: return -1;
78: }
79: }
1.3 misho 80: memset(*Sess, 0, sizeof(sess_t));
81: strlcpy((*Sess)->sess_name, csFName, sizeof (*Sess)->sess_name);
1.2 misho 82:
1.3 misho 83: h = open((*Sess)->sess_name, O_WRONLY | O_CREAT | O_EXCL, SESS_MEM_MODE);
1.2 misho 84: if (h == -1) {
85: if (errno != EEXIST) {
86: LOGERR;
87: e_free(*Sess);
88: return -1;
89: }
90: /* If key file exist, session already connected */
1.3 misho 91: h = open((*Sess)->sess_name, O_RDONLY);
1.2 misho 92: if (h == -1) {
93: LOGERR;
94: e_free(*Sess);
95: return -1;
96: }
97: ret = read(h, szStr, sizeof szStr);
98: if (ret == -1) {
99: LOGERR;
100: close(h);
101: e_free(*Sess);
102: return -1;
103: }
104: if (!strncmp(szStr, "IPC@", 4) && id == SHARED_IPC) {
105: ret = 1;
106:
107: (*Sess)->sess.create = (int (*)(int, long, void*, ...)) ipc_createSession;
108: (*Sess)->sess.destroy = (void (*)(void*)) ipc_destroySession;
109: (*Sess)->sess.attach = (void* (*)(void*, void*)) ipc_attachSession;
110: (*Sess)->sess.detach = (void (*)(void*)) ipc_detachSession;
111: (*Sess)->sess.notSem = (void (*)(void*)) ipc_notSemaphore;
112: (*Sess)->sess.isSemOK = (int (*)(void*)) ipc_isSemaphoreOK;
113: (*Sess)->sess.incSem = (int (*)(void*)) ipc_incSemaphore;
114: (*Sess)->sess.decSem = (int (*)(void*)) ipc_decSemaphore;
115: } else if (!strncmp(szStr, "MAP@", 4) && id == SHARED_MAP) {
116: ret = 1;
117:
118: (*Sess)->sess.create = (int (*)(int, long, void*, ...)) map_createSession;
119: (*Sess)->sess.destroy = (void (*)(void*)) map_destroySession;
120: (*Sess)->sess.attach = (void* (*)(void*, void*)) map_attachSession;
121: (*Sess)->sess.detach = (void (*)(void*)) map_detachSession;
122: (*Sess)->sess.notSem = (void (*)(void*)) map_notSemaphore;
123: (*Sess)->sess.isSemOK = (int (*)(void*)) map_isSemaphoreOK;
124: (*Sess)->sess.incSem = (int (*)(void*)) map_incSemaphore;
125: (*Sess)->sess.decSem = (int (*)(void*)) map_decSemaphore;
126: } else {
127: io_SetErr(EPROTONOSUPPORT,
128: "Session type not supported or wrong session type");
129: close(h);
130: e_free(*Sess);
131: return -1;
132: }
133: /* key found */
134: } else {
135: /* Build new key & new session */
136: if (id == SHARED_IPC) {
137: strlcpy(szStr, "IPC@", sizeof szStr);
138:
139: (*Sess)->sess.create = (int (*)(int, long, void*, ...)) ipc_createSession;
140: (*Sess)->sess.destroy = (void (*)(void*)) ipc_destroySession;
141: (*Sess)->sess.attach = (void* (*)(void*, void*)) ipc_attachSession;
142: (*Sess)->sess.detach = (void (*)(void*)) ipc_detachSession;
143: (*Sess)->sess.notSem = (void (*)(void*)) ipc_notSemaphore;
144: (*Sess)->sess.isSemOK = (int (*)(void*)) ipc_isSemaphoreOK;
145: (*Sess)->sess.incSem = (int (*)(void*)) ipc_incSemaphore;
146: (*Sess)->sess.decSem = (int (*)(void*)) ipc_decSemaphore;
147: } else if (id == SHARED_MAP) {
148: strlcpy(szStr, "MAP@", sizeof szStr);
149:
150: (*Sess)->sess.create = (int (*)(int, long, void*, ...)) map_createSession;
151: (*Sess)->sess.destroy = (void (*)(void*)) map_destroySession;
152: (*Sess)->sess.attach = (void* (*)(void*, void*)) map_attachSession;
153: (*Sess)->sess.detach = (void (*)(void*)) map_detachSession;
154: (*Sess)->sess.notSem = (void (*)(void*)) map_notSemaphore;
155: (*Sess)->sess.isSemOK = (int (*)(void*)) map_isSemaphoreOK;
156: (*Sess)->sess.incSem = (int (*)(void*)) map_incSemaphore;
157: (*Sess)->sess.decSem = (int (*)(void*)) map_decSemaphore;
158: } else {
159: io_SetErr(EINVAL, "Session type must be specified");
160: close(h);
161: unlink(csFName);
162: e_free(*Sess);
163: return -1;
164: }
165: strlcat(szStr, "ELWIX_Session ("PACKAGE_STRING")\n", sizeof szStr);
166: write(h, szStr, strlen(szStr));
167:
168: ret = 0;
169: /* new key created */
170: }
171: close(h);
172:
1.3 misho 173: (*Sess)->sess_type = id;
174: (*Sess)->sess_zcpy = (char) ret;
1.2 misho 175: return ret;
176: }
177:
178: /*
179: * sess_freeSession() - Free allocated memory for session item and delete session file if present name
180: *
181: * @Sess = Session item
182: * return: none
183: */
184: void
1.3 misho 185: sess_freeSession(sess_t ** __restrict Sess)
1.2 misho 186: {
187: if (!Sess || !(*Sess))
188: return;
189:
1.3 misho 190: if ((*Sess)->sess_addr)
1.2 misho 191: DETACH_MEMORY(*Sess);
192:
193: /*
194: memset(&(*Sess)->sess, 0, sizeof (*Sess)->sess);
195:
196: (*Sess)->type = SHARED_UNKNOWN;
197: */
198:
199: e_free(*Sess);
200: *Sess = NULL;
201: }
202:
203:
204: /*
205: * map_createSession() - MMAP Created session and allocated resources
206: *
1.3 misho 207: * @nSeed = Seed for securing key, if =SESS_OPT_SEED must add ready for use key
1.2 misho 208: * @nSize = Allocated shared memory size in bytes
209: * @Sess = Session item
210: * @... = If nSeed == -1 add ready for use key value
211: * return: 0 Ok successful, -1 error: not allocated resources
212: */
213: int
1.3 misho 214: map_createSession(int nSeed, long nSize, sess_t * __restrict Sess, ...)
1.2 misho 215: {
216: char szSName[2][FILENAME_MAX];
217: va_list lst;
218:
1.3 misho 219: if (!Sess || !*Sess->sess_name)
1.2 misho 220: return -1;
221:
1.3 misho 222: if (nSeed != SESS_OPT_SEED) {
1.2 misho 223: /* genkey */
1.3 misho 224: Sess->sess_key = ftok(Sess->sess_name, nSeed);
225: if (Sess->sess_key == -1) {
1.2 misho 226: LOGERR;
227: return -1;
228: }
229: } else {
230: /* get key from va_args */
231: va_start(lst, Sess);
1.3 misho 232: Sess->sess_key = va_arg(lst, key_t);
1.2 misho 233: va_end(lst);
234: }
235:
236: /* build semaphore & shared memory name */
237: memset(szSName, 0, sizeof szSName);
1.3 misho 238: snprintf(szSName[0], SEMNAME_MAX, "/%X.ANS", (u_int) Sess->sess_key);
1.2 misho 239: #ifdef HAVE_SHM_OPEN
1.3 misho 240: snprintf(szSName[1], FILENAME_MAX, "/%s-%x.ANM", Sess->sess_name, (u_int) Sess->sess_key);
1.2 misho 241: #else
1.3 misho 242: snprintf(szSName[1], FILENAME_MAX, "%s-%x.ANM", Sess->sess_name, (u_int) Sess->sess_key);
1.2 misho 243: #endif
244:
245: /* create semaphore & add 1 */
1.3 misho 246: Sess->sess_id.sid = sem_open(szSName[0], O_CREAT, SESS_MEM_MODE);
247: if (Sess->sess_id.sid == SEM_FAILED) {
1.2 misho 248: LOGERR;
249: map_destroySession(Sess);
250: return -1;
251: }
252: /* if is new shared memory session, init sempahore with 1 */
1.3 misho 253: if (!Sess->sess_zcpy)
254: sem_post(Sess->sess_id.sid);
1.2 misho 255:
256: /* create file for shared memory storage */
257: #ifdef HAVE_SHM_OPEN
1.3 misho 258: Sess->sess_mem.fd = shm_open(szSName[1], O_RDWR | O_CREAT, SESS_MEM_MODE);
1.2 misho 259: #else
1.3 misho 260: Sess->sess_mem.fd = open(szSName[1], O_RDWR | O_CREAT, SESS_MEM_MODE);
1.2 misho 261: #endif
1.3 misho 262: if (Sess->sess_mem.fd == -1) {
1.2 misho 263: LOGERR;
264: map_destroySession(Sess);
265: return -1;
266: }
1.3 misho 267: if (!Sess->sess_zcpy) {
268: /* #ifdef HAVE_SHM_OPEN */
269: if (ftruncate(Sess->sess_mem.fd, nSize) == -1) {
1.2 misho 270: LOGERR;
271: map_destroySession(Sess);
272: return -1;
273: }
1.3 misho 274: /* #else */
1.2 misho 275: /* if is new shared memory session, fill file with zeros */
1.3 misho 276: /*
277: if (lseek(Sess->sess_mem.fd, nSize - 1, SEEK_SET) == -1) {
1.2 misho 278: LOGERR;
279: map_destroySession(Sess);
280: return -1;
281: } else
1.3 misho 282: write(Sess->sess_mem.fd, "", 1);
283: lseek(Sess->sess_mem.fd, 0, SEEK_SET);
1.2 misho 284: #endif
1.3 misho 285: */
1.2 misho 286: }
1.3 misho 287: Sess->sess_size = nSize;
1.2 misho 288:
1.3 misho 289: return (int) Sess->sess_zcpy;
1.2 misho 290: }
291:
292: /*
293: * map_destroySession() - MMAP free shared resources
294: *
295: * @Sess = Session item
296: * return: none
297: */
298: void
1.3 misho 299: map_destroySession(sess_t * __restrict Sess)
1.2 misho 300: {
301: char szSName[2][FILENAME_MAX];
302:
1.3 misho 303: if (!Sess || sess_isAttached(Sess) || !*Sess->sess_name)
1.2 misho 304: return;
305:
306: memset(szSName, 0, sizeof szSName);
1.3 misho 307: snprintf(szSName[0], SEMNAME_MAX, "/%X.ANS", (u_int) Sess->sess_key);
1.2 misho 308: #ifdef HAVE_SHM_UNLINK
1.3 misho 309: snprintf(szSName[1], FILENAME_MAX, "/%s-%x.ANM", Sess->sess_name, (u_int) Sess->sess_key);
1.2 misho 310: #else
1.3 misho 311: snprintf(szSName[1], FILENAME_MAX, "%s-%x.ANM", Sess->sess_name, (u_int) Sess->sess_key);
1.2 misho 312: #endif
313:
1.3 misho 314: if (Sess->sess_id.sid != SEM_FAILED) {
315: sem_close(Sess->sess_id.sid);
1.2 misho 316: sem_unlink(szSName[0]);
317: }
1.3 misho 318: if (Sess->sess_mem.fd > 2) {
319: close(Sess->sess_mem.fd);
1.2 misho 320: #ifdef HAVE_SHM_UNLINK
321: shm_unlink(szSName[1]);
322: #else
323: unlink(szSName[1]);
324: #endif
325: }
1.3 misho 326: unlink(Sess->sess_name);
327: memset(Sess->sess_name, 0, sizeof Sess->sess_name);
328: Sess->sess_size ^= Sess->sess_size;
329: Sess->sess_key ^= Sess->sess_key;
1.2 misho 330: }
331:
332: /*
333: * ipc_createSession() - IPC Created session and allocated resources
334: *
1.3 misho 335: * @nSeed = Seed for securing key, if =SESS_OPT_SEED must add ready for use key
1.2 misho 336: * @nSize = Allocated shared memory size in bytes
337: * @Sess = Session item
338: * @... = If nSeed == -1 add ready for use key value
339: * return: 0 Ok successful, -1 error: not allocated resources
340: */
341: int
1.3 misho 342: ipc_createSession(int nSeed, long nSize, sess_t * __restrict Sess, ...)
1.2 misho 343: {
344: union semun sems;
345: va_list lst;
346:
1.3 misho 347: if (!Sess || !*Sess->sess_name)
1.2 misho 348: return -1;
349:
350: if (nSeed != -1) {
351: /* genkey */
1.3 misho 352: Sess->sess_key = ftok(Sess->sess_name, nSeed);
353: if (Sess->sess_key == -1) {
1.2 misho 354: LOGERR;
355: return -1;
356: }
357: } else {
358: /* get key from va_args */
359: va_start(lst, Sess);
1.3 misho 360: Sess->sess_key = va_arg(lst, key_t);
1.2 misho 361: va_end(lst);
362: }
363:
364: /* create semaphore */
1.3 misho 365: Sess->sess_id.semid = semget(Sess->sess_key, 1, SESS_MEM_MODE | IPC_CREAT);
366: if (Sess->sess_id.semid == -1) {
1.2 misho 367: LOGERR;
368: ipc_destroySession(Sess);
369: return -1;
370: }
371: /* if is new shared memory session, init sempahore with 1 */
1.3 misho 372: if (!Sess->sess_zcpy) {
1.2 misho 373: sems.val = 1;
1.3 misho 374: if (semctl(Sess->sess_id.semid, 0, SETVAL, sems) == -1) {
1.2 misho 375: LOGERR;
376: ipc_destroySession(Sess);
377: return -1;
378: }
379: }
380:
381: /* create shared memory object */
1.3 misho 382: Sess->sess_mem.shmid = shmget(Sess->sess_key, nSize, SESS_MEM_MODE | IPC_CREAT);
383: if (Sess->sess_mem.shmid == -1) {
1.2 misho 384: LOGERR;
385: ipc_destroySession(Sess);
386: return -1;
387: } else
1.3 misho 388: Sess->sess_size = nSize;
1.2 misho 389:
1.3 misho 390: return (int) Sess->sess_zcpy;
1.2 misho 391: }
392:
393: /*
394: * ipc_destroySession() - IPC free shared resources
395: *
396: * @Sess = Session item
397: * return: none
398: */
399: void
1.3 misho 400: ipc_destroySession(sess_t * __restrict Sess)
1.2 misho 401: {
402: union semun sems;
403: struct shmid_ds ds;
404:
405: if (!Sess || sess_isAttached(Sess))
406: return;
407:
1.3 misho 408: if (Sess->sess_id.semid != -1)
409: semctl(Sess->sess_id.semid, 0, IPC_RMID, &sems);
410: if (Sess->sess_mem.shmid != -1)
411: shmctl(Sess->sess_mem.shmid, IPC_RMID, &ds);
412: unlink(Sess->sess_name);
413: memset(Sess->sess_name, 0, sizeof Sess->sess_name);
414: Sess->sess_size ^= Sess->sess_size;
415: Sess->sess_key ^= Sess->sess_key;
1.2 misho 416: }
417:
418:
419: /*
420: * map_attachSession() - MMAP Attach to shared memory & return begin address
421: *
422: * @s = Session item
423: * @procMem = Custom start address (optionl) *default must be 0*
424: * return: NULL failed attach, !=NULL begin address of memory
425: */
426: void *
1.3 misho 427: map_attachSession(sess_t * __restrict s, void *procMem)
1.2 misho 428: {
429: if (!s)
430: return NULL;
431:
432: sync();
433:
434: /* attach to memory */
1.3 misho 435: s->sess_addr = mmap(procMem, s->sess_size, PROT_READ | PROT_WRITE, MAP_SHARED, s->sess_mem.fd, 0);
436: if (s->sess_addr == MAP_FAILED) {
1.2 misho 437: LOGERR;
1.3 misho 438: s->sess_addr = NULL;
1.2 misho 439: }
440:
1.3 misho 441: return s->sess_addr;
1.2 misho 442: }
443:
444: /*
445: * map_detachSession() - MMAP Detach from shared memory
446: *
447: * @s = Session item
448: * return: none
449: */
450: void
1.3 misho 451: map_detachSession(sess_t * __restrict s)
1.2 misho 452: {
453: if (!s)
454: return;
455:
1.3 misho 456: msync(s->sess_addr, 0, MS_SYNC | MS_INVALIDATE);
1.2 misho 457:
1.3 misho 458: if (s->sess_size) {
459: munmap(s->sess_addr, s->sess_size);
460: s->sess_addr = NULL;
1.2 misho 461: }
462: }
463:
464: /*
465: * ipc_attachSession() - IPC Attach to shared memory & return begin address
466: *
467: * @s = Session item
468: * @procMem = Custom start address (optionl) *default must be 0*
469: * return: NULL failed attach, !=NULL begin address of memory
470: */
471: void *
1.3 misho 472: ipc_attachSession(sess_t * __restrict s, void *procMem)
1.2 misho 473: {
474: if (!s)
475: return NULL;
476:
1.3 misho 477: s->sess_addr = shmat(s->sess_mem.shmid, procMem, 0);
478: if (s->sess_addr == (void*) -1) {
1.2 misho 479: LOGERR;
1.3 misho 480: s->sess_addr = NULL;
1.2 misho 481: }
482:
1.3 misho 483: return s->sess_addr;
1.2 misho 484: }
485:
486: /*
487: * ipc_detachSession() - IPC Detach from shared memory
488: *
489: * @s = Session item
490: * return: none
491: */
492: void
1.3 misho 493: ipc_detachSession(sess_t * __restrict s)
1.2 misho 494: {
495: if (!s)
496: return;
497:
1.3 misho 498: if (s->sess_size) {
499: shmdt(s->sess_addr);
500: s->sess_addr = NULL;
1.2 misho 501: }
502: }
503:
504: /*
505: * sess_isAttached() - Check for attached shared memory
506: *
507: * @s = Session item
508: * return: -1 null session item, 0 not attached, 1 attached memory
509: */
1.4 misho 510: int
1.3 misho 511: sess_isAttached(sess_t * __restrict s)
1.2 misho 512: {
513: if (!s)
514: return -1;
515:
1.3 misho 516: return !!s->sess_addr;
1.2 misho 517: }
518:
519:
520: /*
521: * map_notSemaphore() - MMAP negative block if semaphore isn`t signaled
522: *
523: * @s = Session item
524: * return: none
525: */
526: void
1.3 misho 527: map_notSemaphore(sess_t * __restrict s)
1.2 misho 528: {
529: int i = -1;
530:
531: if (!s)
532: return;
533:
1.3 misho 534: sem_getvalue(s->sess_id.sid, &i);
535: for (; i; i--)
536: sem_wait(s->sess_id.sid);
1.2 misho 537: }
538:
539: /*
540: * map_isSemaphoreOK() - MMAP Check semaphore
541: *
542: * @s = Session item
543: * return: -1 error: can`t return semaphore, 0 = false, 1 = true
544: */
545: int
1.3 misho 546: map_isSemaphoreOK(sess_t * __restrict s)
1.2 misho 547: {
548: int val = -1;
549:
550: if (!s)
551: return -1;
552:
1.3 misho 553: return sem_getvalue(s->sess_id.sid, &val) + 1;
1.2 misho 554: }
555:
556: /*
557: * map_incSemaphore() - MMAP unblock semaphore, increment semaphore
558: *
559: * @s = Session item
560: * return: 0 Ok, -1 error: can`t increment
561: */
562: int
1.3 misho 563: map_incSemaphore(sess_t * __restrict s)
1.2 misho 564: {
565: if (!s)
566: return -1;
567:
1.3 misho 568: return sem_post(s->sess_id.sid);
1.2 misho 569: }
570:
571: /*
572: * map_decSemaphore() - MMAP block semaphore, decrement semaphore
573: *
574: * @s = Session item
575: * return: 0 Ok, -1 error: can`t decrement
576: */
577: int
1.3 misho 578: map_decSemaphore(sess_t * __restrict s)
1.2 misho 579: {
580: if (!s)
581: return -1;
582:
1.3 misho 583: return sem_wait(s->sess_id.sid);
1.2 misho 584: }
585:
586: /*
587: * ipc_notSemaphore() - IPC negative block if semaphore isn`t signaled
588: *
589: * @s = Session item
590: * return: none
591: */
592: void
1.3 misho 593: ipc_notSemaphore(sess_t * __restrict s)
1.2 misho 594: {
595: struct sembuf sb = { 0, 0, 0 };
596:
597: if (s)
1.3 misho 598: semop(s->sess_id.semid, &sb, 1);
1.2 misho 599: }
600:
601: /*
602: * ipc_isSemaphoreOK() - IPC Check semaphore
603: *
604: * @s = Session item
605: * return: -1 error: can`t return semaphore, 0 = false, 1 = true
606: */
607: int
1.3 misho 608: ipc_isSemaphoreOK(sess_t * __restrict s)
1.2 misho 609: {
610: struct sembuf sb = { 0, 0, IPC_NOWAIT };
611:
612: if (!s)
613: return -1;
614:
1.3 misho 615: return semop(s->sess_id.semid, &sb, 1) + 1;
1.2 misho 616: }
617:
618: /*
619: * ipc_incSemaphore() - IPC unblock semaphore, increment semaphore
620: *
621: * @s = Session item
622: * return: 0 Ok, -1 error: can`t increment
623: */
624: int
1.3 misho 625: ipc_incSemaphore(sess_t * __restrict s)
1.2 misho 626: {
627: struct sembuf sb = { 0, 1, 0 };
628:
629: if (!s)
630: return -1;
631:
1.3 misho 632: return semop(s->sess_id.semid, &sb, 1);
1.2 misho 633: }
634:
635: /*
636: * ipc_decSemaphore() - IPC block semaphore, decrement semaphore
637: *
638: * @s = Session item
639: * return: 0 Ok, -1 error: can`t decrement
640: */
641: int
1.3 misho 642: ipc_decSemaphore(sess_t * __restrict s)
1.2 misho 643: {
644: struct sembuf sb = { 0, -1, 0 };
645:
646: if (!s)
647: return -1;
648:
1.3 misho 649: return semop(s->sess_id.semid, &sb, 1);
1.2 misho 650: }
651:
652: /* --- A/V management --- */
653:
654: /*
655: * sess_GetValues() - Get all values from session shared memory
656: *
657: * @s = Session item
1.3 misho 658: * @Vals = Return array strings
659: * return: -1 error: in parameter, !=-1 count of returned strings in Vals
660: * (must call ait_freeVars() after use!)
1.2 misho 661: */
662: int
1.3 misho 663: sess_GetValues(sess_t * __restrict s, array_t ** __restrict Vals)
1.2 misho 664: {
665: register int i;
1.3 misho 666: char *Shared = NULL;
1.2 misho 667: char *peer, *p_brk;
1.3 misho 668: ait_val_t *v;
1.2 misho 669:
1.3 misho 670: if (!s || !Vals)
1.2 misho 671: return -1;
1.3 misho 672: *Vals = ait_allocVars(0);
673: if (!*Vals) {
674: io_SetErr(elwix_GetErrno(), "%s", elwix_GetError());
1.2 misho 675: return -1;
1.3 misho 676: }
1.2 misho 677:
678: /* allocated memory & mirrored shared memory into this */
1.3 misho 679: Shared = e_malloc(s->sess_size);
1.2 misho 680: if (!Shared) {
681: LOGERR;
1.3 misho 682: ait_freeVars(Vals);
1.2 misho 683: return -1;
1.3 misho 684: }
685:
686: DEC_SEM(s);
687: memcpy(Shared, s->sess_addr, s->sess_size);
688: INC_SEM(s);
1.2 misho 689:
690: for (i = 0, peer = strtok_r(Shared, SESS_MEM_DELIM"\r\n", &p_brk); peer;
691: peer = strtok_r(NULL, SESS_MEM_DELIM"\r\n", &p_brk)) {
692: if (!strchr(peer, '='))
693: continue;
694: else
695: i++;
696:
1.3 misho 697: if (!(v = ait_allocVar())) {
698: io_SetErr(elwix_GetErrno(), "%s", elwix_GetError());
1.2 misho 699: e_free(Shared);
1.3 misho 700: ait_freeVars(Vals);
1.2 misho 701: return -1;
702: } else
1.3 misho 703: AIT_SET_STR(v, peer);
1.2 misho 704:
1.3 misho 705: array_Push(*Vals, v, 0);
1.2 misho 706: }
707:
708: e_free(Shared);
1.3 misho 709: ait_hashKeyVars(*Vals);
1.2 misho 710: return i;
711: }
712:
713: /*
714: * sess_GetValue() - Get value from session shared memory from attribute
715: *
716: * @s = Session item
717: * @csAttr = Attribute for search
1.3 misho 718: * @v = Return string value and after use must call ait_freeVar(), also may be =NULL
1.2 misho 719: * return: 0 not found, -1 error: in parameter, >0 get position,
720: * if define item merged with IS_DEF
721: */
722: int
1.3 misho 723: sess_GetValue(sess_t * __restrict s, const char *csAttr, ait_val_t ** __restrict v)
1.2 misho 724: {
725: register int i;
1.3 misho 726: int def = 0;
1.2 misho 727: char *Shared = NULL;
728: char *peer, *p_brk, *a_brk, *attr, *val;
729:
730: if (!s || !csAttr || !*csAttr)
731: return -1;
1.3 misho 732: if (v) {
733: if (!(*v = ait_allocVar())) {
734: io_SetErr(elwix_GetErrno(), "%s", elwix_GetError());
1.2 misho 735: return -1;
1.3 misho 736: } else
737: AIT_INIT_VAL2(*v, string);
1.2 misho 738: }
739:
740: /* allocated memory & mirrored shared memory into this */
1.3 misho 741: Shared = e_malloc(s->sess_size);
1.2 misho 742: if (!Shared) {
743: LOGERR;
1.3 misho 744: ait_freeVar(v);
1.2 misho 745: return -1;
1.3 misho 746: }
747:
748: DEC_SEM(s);
749: memcpy(Shared, s->sess_addr, s->sess_size);
750: INC_SEM(s);
1.2 misho 751:
752: for (i = 1, peer = strtok_r(Shared, SESS_MEM_DELIM"\r\n", &p_brk); peer;
753: i++, peer = strtok_r(NULL, SESS_MEM_DELIM"\r\n", &p_brk)) {
754: attr = strtok_r(peer, "=\r\n", &a_brk);
1.3 misho 755: if (attr && !strncmp(attr, csAttr, SESS_MAX_ATTRIBUTE - 1)) {
1.2 misho 756: val = strtok_r(NULL, "=\r\n", &a_brk);
1.3 misho 757: if (val && strlen(val))
758: AIT_SET_STR(*v, val);
759: else
760: def = SESS_F_DEF;
1.2 misho 761:
762: e_free(Shared);
763: return i | def;
764: }
765: }
766:
767: e_free(Shared);
768: return 0;
769: }
770:
771: /*
772: * sess_DelValue() - Delete item from session shared memory
773: *
774: * @s = Session item
775: * @csAttr = Attribute for erasing
1.3 misho 776: * return: -1 error: in parameter or !=-1 deleted items
1.2 misho 777: */
778: int
1.3 misho 779: sess_DelValue(sess_t * __restrict s, const char *csAttr)
1.2 misho 780: {
781: register int i;
1.3 misho 782: int attrlen, d = 0;
783: char *Buffer, *Shared, szAttr[SESS_MAX_ATTRIBUTE];
1.2 misho 784: char *peer, *p_brk;
785:
786: if (!s || !csAttr || !*csAttr)
787: return -1;
788: else
789: attrlen = strlen(csAttr);
790: Buffer = Shared = NULL;
791: strlcpy(szAttr, csAttr, sizeof szAttr);
792: strlcat(szAttr, "=", sizeof szAttr);
793:
1.3 misho 794: Buffer = e_malloc(s->sess_size);
1.2 misho 795: if (!Buffer) {
796: LOGERR;
797: return -1;
798: } else
1.3 misho 799: memset(Buffer, 0, s->sess_size);
800: Shared = e_malloc(s->sess_size);
1.2 misho 801: if (!Shared) {
802: LOGERR;
803: e_free(Buffer);
804: return -1;
805: } else {
806: DEC_SEM(s);
1.3 misho 807: memcpy(Shared, s->sess_addr, s->sess_size);
1.2 misho 808: }
809:
810: for (i = 1, peer = strtok_r(Shared, SESS_MEM_DELIM"\r\n", &p_brk); peer;
811: i++, peer = strtok_r(NULL, SESS_MEM_DELIM"\r\n", &p_brk)) {
812: if (!strncmp(peer, csAttr, attrlen))
1.3 misho 813: if (peer[attrlen] == '=' || !peer[attrlen]) {
814: d++;
1.2 misho 815: continue;
1.3 misho 816: }
1.2 misho 817:
1.3 misho 818: strlcat(Buffer, peer, s->sess_size);
819: strlcat(Buffer, SESS_MEM_DELIM, s->sess_size);
1.2 misho 820: }
821:
1.3 misho 822: memcpy(s->sess_addr, Buffer, s->sess_size);
1.2 misho 823:
1.3 misho 824: if (s->sess_type == SHARED_MAP)
825: msync(s->sess_addr, 0, MS_SYNC | MS_INVALIDATE);
1.2 misho 826:
827: INC_SEM(s);
828: e_free(Shared);
829: e_free(Buffer);
1.3 misho 830: return d;
1.2 misho 831: }
832:
833: /*
834: * sess_SetValue() - Set item into session shared memory or update if exists
835: *
836: * @s = Session item
837: * @csAttr = Attribute
838: * @psVal = Value
839: * return: 0 nothing, -1 error: in parameter,
1.3 misho 840: >0 set position, if added new item merged with SESS_F_ADD and
841: if just define item merged with SESS_F_DEF
1.2 misho 842: */
843: int
1.3 misho 844: sess_SetValue(sess_t * __restrict s, const char *csAttr, const char *psVal)
1.2 misho 845: {
846: register int i;
1.3 misho 847: int upd = 0, def = 0;
848: char *Buffer, *Shared, szAttr[SESS_MAX_ATTRIBUTE];
1.2 misho 849: char *peer, *p_brk;
850:
851: if (!s || !csAttr || !*csAttr)
852: return -1;
853: else
854: Buffer = Shared = NULL;
855: strlcpy(szAttr, csAttr, sizeof szAttr);
856: strlcat(szAttr, "=", sizeof szAttr);
857:
1.3 misho 858: Buffer = e_malloc(s->sess_size);
1.2 misho 859: if (!Buffer) {
860: LOGERR;
861: return -1;
862: } else
1.3 misho 863: memset(Buffer, 0, s->sess_size);
864: Shared = e_malloc(s->sess_size);
1.2 misho 865: if (!Shared) {
866: LOGERR;
867: e_free(Buffer);
868: return -1;
869: } else {
870: DEC_SEM(s);
1.3 misho 871: memcpy(Shared, s->sess_addr, s->sess_size);
1.2 misho 872: }
873:
1.3 misho 874: for (i = 1, peer = strtok_r(Shared, SESS_MEM_DELIM"\r\n", &p_brk); peer;
875: i++, peer = strtok_r(NULL, SESS_MEM_DELIM"\r\n", &p_brk))
1.2 misho 876: if (!strncmp(peer, szAttr, strlen(szAttr))) {
877: upd++;
878: if (psVal) {
1.3 misho 879: strlcat(Buffer, szAttr, s->sess_size);
880: strlcat(Buffer, psVal, s->sess_size);
881: strlcat(Buffer, SESS_MEM_DELIM, s->sess_size);
1.2 misho 882: } else {
1.3 misho 883: strlcat(Buffer, csAttr, s->sess_size);
884: strlcat(Buffer, SESS_MEM_DELIM, s->sess_size);
885: def = SESS_F_DEF;
1.2 misho 886: }
1.3 misho 887: } else {
888: strlcat(Buffer, peer, s->sess_size);
889: strlcat(Buffer, SESS_MEM_DELIM, s->sess_size);
1.2 misho 890: }
891:
892: if (!upd) {
893: if (psVal) {
1.3 misho 894: strlcat(Buffer, szAttr, s->sess_size);
895: strlcat(Buffer, psVal, s->sess_size);
896: strlcat(Buffer, SESS_MEM_DELIM, s->sess_size);
1.2 misho 897: } else {
1.3 misho 898: strlcat(Buffer, csAttr, s->sess_size);
899: strlcat(Buffer, SESS_MEM_DELIM, s->sess_size);
900: def = SESS_F_DEF;
1.2 misho 901: }
1.3 misho 902: def |= SESS_F_ADD;
1.2 misho 903: }
904:
1.3 misho 905: memcpy(s->sess_addr, Buffer, s->sess_size);
1.2 misho 906:
1.3 misho 907: if (s->sess_type == SHARED_MAP)
908: msync(s->sess_addr, 0, MS_SYNC | MS_INVALIDATE);
1.2 misho 909:
910: INC_SEM(s);
911: e_free(Shared);
912: e_free(Buffer);
913: return upd | def;
914: }
915:
916:
917: /*
918: * sess_prepareSession() - Attach to shared memory and de-marshaling data
919: *
920: * @s = Session
921: * @useDirect = Use direct shared memory if !=0 or snapshot of data to array
922: * return: NULL error or no data, !=NULL array with variables,
923: * after use must free resources with sess_doneSession()
924: */
925: array_t *
1.3 misho 926: sess_prepareSession(sess_t * __restrict s, char useDirect)
1.2 misho 927: {
928: array_t *arr = NULL;
929: sess_hdr_t *hdr;
930:
931: if (!s) {
932: io_SetErr(EINVAL, "Invalid argument\n");
933: return NULL;
934: }
1.3 misho 935: if (s->sess_addr) {
1.2 misho 936: io_SetErr(EINVAL, "Already attached memory\n");
937: return NULL;
938: }
939:
1.3 misho 940: if (!ATTACH_MEMORY(s))
1.2 misho 941: return NULL;
942: else
1.3 misho 943: hdr = (sess_hdr_t*) s->sess_addr;
1.2 misho 944: if (hdr->hdr_magic != SESS_AIT_MAGIC) {
945: DETACH_MEMORY(s);
946:
947: io_SetErr(EINVAL, "Shared memory not contains values with proper format\n");
948: return NULL;
949: }
950:
951: DEC_SEM(s);
1.3 misho 952: s->sess_zcpy = useDirect;
953: arr = ait_map2vars(s->sess_addr + sizeof(sess_hdr_t), s->sess_size - sizeof(sess_hdr_t),
954: hdr->hdr_argc, s->sess_zcpy);
1.2 misho 955: INC_SEM(s);
956:
1.3 misho 957: if (!s->sess_zcpy)
1.2 misho 958: DETACH_MEMORY(s);
959: return arr;
960: }
961:
962: /*
963: * sess_doneSession() - Free resources allocated with sess_prepareSession()
964: *
965: * @s = Session
966: * @arr = Array with variables for free
967: * return: none
968: */
969: void
1.3 misho 970: sess_doneSession(sess_t * __restrict s, array_t ** __restrict arr)
1.2 misho 971: {
972: if (!s) {
973: io_SetErr(EINVAL, "Invalid argument\n");
974: return;
975: }
976:
1.3 misho 977: if (!s->sess_zcpy)
1.2 misho 978: array_Free(*arr);
979: else
980: DETACH_MEMORY(s);
981: array_Destroy(arr);
982: }
983:
984: /*
985: * sess_commitSession() - Commit data to shared memory
986: *
987: * @s = Session
988: * @arr = Array with variables for save
989: * return -1 error or !=-1 size of stored variables into shared memory
990: */
991: int
1.3 misho 992: sess_commitSession(sess_t * __restrict s, array_t * __restrict arr)
1.2 misho 993: {
994: sess_hdr_t *hdr;
995: int ret = 0;
996:
997: if (!s || !arr) {
998: io_SetErr(EINVAL, "Invalid argument\n");
999: return -1;
1000: }
1001:
1.3 misho 1002: if (!ATTACH_MEMORY(s)) {
1.2 misho 1003: DETACH_MEMORY(s);
1004: return -1;
1005: } else
1.3 misho 1006: hdr = (sess_hdr_t*) s->sess_addr;
1.2 misho 1007:
1008: DEC_SEM(s);
1.3 misho 1009: if ((ret = ait_vars2map(s->sess_addr + sizeof(sess_hdr_t),
1010: s->sess_size - sizeof(sess_hdr_t), arr)) != -1) {
1.2 misho 1011: hdr->hdr_magic = SESS_AIT_MAGIC;
1012: hdr->hdr_argc = array_Size(arr);
1013: ret += sizeof(sess_hdr_t);
1014: }
1015: INC_SEM(s);
1016:
1017: DETACH_MEMORY(s);
1018: return ret;
1019: }
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