Annotation of libaitsess/src/sess.c, revision 1.3.2.4
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 $
1.3.2.4 ! misho 6: * $Id: sess.c,v 1.3.2.3 2011/09/07 21:06:56 misho Exp $
1.2 misho 7: *
1.3 misho 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
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: */
1.1 misho 46: #include "global.h"
47: #include "aitsess.h"
48:
49:
50: /*
1.2 misho 51: * sess_FreeValues() Free all values from value array allocated from sess_GetValues()
52: * @ppsVals = Array strings
53: * return: none
54: */
1.3 misho 55: inline void
56: sess_FreeValues(char *** __restrict ppsVals)
1.2 misho 57: {
58: char **ptr;
59:
1.3 misho 60: assert(ppsVals);
61: if (!ppsVals)
62: return;
63:
1.2 misho 64: for (ptr = *ppsVals; *ptr; ptr++)
65: free(*ptr);
66: free(*ppsVals);
67: *ppsVals = NULL;
68: }
69:
70: /*
71: * sess_GetValues() Get all values from session shared memory
72: * @s = Session item
73: * @ppsVals = Return array strings
74: * return: -1 error: in parameter, !=-1 count of returned strings in ppsVals (must be free after use!)
75: */
1.3 misho 76: int
77: sess_GetValues(tagSess * __restrict s, char ***ppsVals)
1.2 misho 78: {
79: register int i;
80: char **valz, *Shared = NULL;
81: char *peer, *p_brk;
82:
83: if (!s || !ppsVals)
84: return -1;
85: valz = malloc(sizeof(caddr_t));
86: if (!valz) {
87: LOGERR;
88: return -1;
89: } else
90: *valz = NULL;
91:
92: // allocated memory & mirrored shared memory into this
93: Shared = malloc(s->eom);
94: if (!Shared) {
95: LOGERR;
96: free(valz);
97: return -1;
98: } else
99: memcpy(Shared, s->addr, s->eom);
100:
101: for (i = 0, peer = strtok_r(Shared, MEM_DELIM"\r\n", &p_brk); peer;
102: peer = strtok_r(NULL, MEM_DELIM"\r\n", &p_brk)) {
103: if (!strchr(peer, '='))
104: continue;
105: else
106: i++;
107:
108: valz = realloc(valz, (i + 1) * sizeof(caddr_t));
109: if (!valz) {
110: LOGERR;
111: free(Shared);
112: return -1;
113: } else
114: valz[i] = NULL;
115:
116: valz[i - 1] = strdup(peer);
117: }
118:
119: free(Shared);
120: *ppsVals = valz;
121: return i;
122: }
123:
124: /*
1.1 misho 125: * sess_GetValue() Get value from session shared memory from attribute
126: * @s = Session item
127: * @csAttr = Attribute for search
128: * @psVal = Return string buffer
129: * @pnLen = Length of return string buffer,
130: // *{pnLen} input is max_size of buffer & output is really taken bytes
131: * return: 0 not found, -1 error: in parameter, >0 get position, if define item merged with IS_DEF
132: */
1.3 misho 133: int
134: sess_GetValue(tagSess * __restrict s, const char *csAttr, char *psVal, int *pnLen)
1.1 misho 135: {
136: register int i;
137: int def = IS_VAL;
138: char *Shared = NULL;
139: char *peer, *p_brk, *a_brk, *attr, *val;
140:
141: if (!s || !csAttr || !*csAttr)
142: return -1;
143: if (psVal) {
144: if (pnLen && *pnLen > 0)
145: memset(psVal, 0, *pnLen);
146: else
147: return -1;
148: }
149:
150: // allocated memory & mirrored shared memory into this
151: Shared = malloc(s->eom);
152: if (!Shared) {
153: LOGERR;
154: return -1;
155: } else
156: memcpy(Shared, s->addr, s->eom);
157:
1.2 misho 158: for (i = 1, peer = strtok_r(Shared, MEM_DELIM"\r\n", &p_brk); peer;
159: i++, peer = strtok_r(NULL, MEM_DELIM"\r\n", &p_brk)) {
1.1 misho 160: attr = strtok_r(peer, "=\r\n", &a_brk);
1.3.2.2 misho 161: if (attr && !strncmp(attr, csAttr, MAX_ATTRIBUTE - 1)) {
1.1 misho 162: val = strtok_r(NULL, "=\r\n", &a_brk);
163: if (val && strlen(val)) {
164: if (psVal)
1.2 misho 165: strlcpy(psVal, val, *pnLen);
1.1 misho 166: if (pnLen)
167: *pnLen = strlen(val);
168: } else
169: def = IS_DEF;
170:
171: free(Shared);
172: return i | def;
173: }
174: }
175:
176: free(Shared);
177: return 0;
178: }
179:
180: /*
181: * sess_DelValue() Delete item from session shared memory
182: * @s = Session item
183: * @csAttr = Attribute for erasing
184: * return: 0 Ok, -1 error: in parameter
185: */
1.3 misho 186: int
187: sess_DelValue(tagSess * __restrict s, const char *csAttr)
1.1 misho 188: {
189: register int i;
190: int ret, attrlen;
1.3.2.2 misho 191: char *Buffer, *Shared, szAttr[MAX_ATTRIBUTE];
1.1 misho 192: char *peer, *p_brk;
193:
194: if (!s || !csAttr || !*csAttr)
195: return -1;
196: else
197: attrlen = strlen(csAttr);
198: Buffer = Shared = NULL;
1.3.2.2 misho 199: strlcpy(szAttr, csAttr, sizeof szAttr);
200: strlcat(szAttr, "=", sizeof szAttr);
1.1 misho 201:
202: Buffer = malloc(s->eom);
203: if (!Buffer) {
204: LOGERR;
205: return -1;
206: } else
207: memset(Buffer, 0, s->eom);
208: Shared = malloc(s->eom);
209: if (!Shared) {
210: LOGERR;
211: free(Buffer);
212: return -1;
213: } else {
214: DEC_SEMAPHORE(s, ret);
215: memcpy(Shared, s->addr, s->eom);
216: }
217:
1.2 misho 218: for (i = 1, peer = strtok_r(Shared, MEM_DELIM"\r\n", &p_brk); peer;
219: i++, peer = strtok_r(NULL, MEM_DELIM"\r\n", &p_brk)) {
1.1 misho 220: if (!strncmp(peer, csAttr, attrlen))
1.2 misho 221: if (peer[attrlen] == '=' || peer[attrlen] == *MEM_DELIM || !peer[attrlen] ||
1.1 misho 222: peer[attrlen] == '\r' || peer[attrlen] == '\n')
223: continue;
224:
1.3.2.2 misho 225: strlcat(Buffer, peer, s->eom);
226: strlcat(Buffer, MEM_DELIM, s->eom);
1.1 misho 227: }
228:
229: memcpy(s->addr, Buffer, s->eom);
230:
231: if (s->type == SHARED_MAP)
232: msync(s->addr, 0, MS_SYNC | MS_INVALIDATE);
233:
234: ADD_SEMAPHORE(s, ret);
235: free(Shared);
236: free(Buffer);
237: return 0;
238: }
239:
240: /*
241: * sess_SetValue() Set item into session shared memory or update if find it
242: * @s = Session item
243: * @csAttr = Attribute
244: * @psVal = Value
245: * return: 0 nothing, -1 error: in parameter,
246: >0 set position, if add item merged with IS_ADD and if define item merged with IS_DEF
247: */
1.3 misho 248: int
249: sess_SetValue(tagSess * __restrict s, const char *csAttr, const char *psVal)
1.1 misho 250: {
251: register int i;
252: int upd, ret, def = IS_VAL;
1.3.2.2 misho 253: char *Buffer, *Shared, szAttr[MAX_ATTRIBUTE];
1.1 misho 254: char *peer, *p_brk;
255:
256: if (!s || !csAttr || !*csAttr)
257: return -1;
258: else
259: Buffer = Shared = NULL;
1.3.2.2 misho 260: strlcpy(szAttr, csAttr, sizeof szAttr);
261: strlcat(szAttr, "=", sizeof szAttr);
1.1 misho 262:
263: Buffer = malloc(s->eom);
264: if (!Buffer) {
265: LOGERR;
266: return -1;
267: } else
268: memset(Buffer, 0, s->eom);
269: Shared = malloc(s->eom);
270: if (!Shared) {
271: LOGERR;
272: free(Buffer);
273: return -1;
274: } else {
275: DEC_SEMAPHORE(s, ret);
276: memcpy(Shared, s->addr, s->eom);
277: }
278:
1.2 misho 279: for (i = 1, upd = 0, peer = strtok_r(Shared, MEM_DELIM"\r\n", &p_brk); peer;
280: i++, peer = strtok_r(NULL, MEM_DELIM"\r\n", &p_brk)) {
1.1 misho 281: if (!strncmp(peer, szAttr, strlen(szAttr))) {
282: upd++;
283: if (psVal) {
1.3.2.2 misho 284: strlcat(Buffer, szAttr, s->eom);
285: strlcat(Buffer, psVal, s->eom);
286: strlcat(Buffer, MEM_DELIM, s->eom);
1.1 misho 287: } else {
1.3.2.2 misho 288: strlcat(Buffer, csAttr, s->eom);
289: strlcat(Buffer, MEM_DELIM, s->eom);
1.1 misho 290: def = IS_DEF;
291: }
292: continue;
293: }
294:
1.3.2.2 misho 295: strlcat(Buffer, peer, s->eom);
296: strlcat(Buffer, MEM_DELIM, s->eom);
1.1 misho 297: }
298:
299: if (!upd) {
300: if (psVal) {
1.3.2.2 misho 301: strlcat(Buffer, szAttr, s->eom);
302: strlcat(Buffer, psVal, s->eom);
303: strlcat(Buffer, MEM_DELIM, s->eom);
1.1 misho 304: } else {
1.3.2.2 misho 305: strlcat(Buffer, csAttr, s->eom);
306: strlcat(Buffer, MEM_DELIM, s->eom);
1.1 misho 307: def = IS_DEF;
308: }
309: def |= IS_ADD;
310: }
311:
312: memcpy(s->addr, Buffer, s->eom);
313:
314: if (s->type == SHARED_MAP)
315: msync(s->addr, 0, MS_SYNC | MS_INVALIDATE);
316:
317: ADD_SEMAPHORE(s, ret);
318: free(Shared);
319: free(Buffer);
320: return upd | def;
321: }
1.3.2.1 misho 322:
323:
324: /*
325: * sess_prepareSession() Attach to shared memory and de-marshaling data
326: * @s = Session
327: * @useDirect = Use direct shared memory if !=0 or snapshot of data to array
328: * return: NULL error or no data, !=NULL array with variables,
329: * after use must free resources with sess_doneSession()
330: */
331: array_t *
332: sess_prepareSession(tagSess * __restrict s, u_char useDirect)
333: {
334: array_t *arr = NULL;
335: sess_hdr_t *hdr;
336: int ret;
337:
338: assert(s);
339: if (!s) {
340: sess_SetErr(EINVAL, "Error:: invalid argument\n");
341: return NULL;
342: }
1.3.2.4 ! misho 343: if (s->addr) {
! 344: sess_SetErr(EINVAL, "Error:: already attached memory\n");
! 345: return NULL;
! 346: }
1.3.2.1 misho 347:
348: ATTACH_MEMORY(s);
349: if (!s->addr)
350: return NULL;
351: else
352: hdr = (sess_hdr_t*) s->addr;
353: if (hdr->hdr_magic != SESS_AIT_MAGIC) {
354: DETACH_MEMORY(s);
355:
356: sess_SetErr(EINVAL, "Error:: shared memory not contains values with proper format\n");
357: return NULL;
358: }
359:
360: DEC_SEMAPHORE(s, ret);
361: s->zcopy = useDirect;
362: arr = io_map2vals(s->addr + sizeof(sess_hdr_t), s->eom - sizeof(sess_hdr_t),
363: hdr->hdr_argc, useDirect);
364: ADD_SEMAPHORE(s, ret);
365:
366: if (!s->zcopy)
367: DETACH_MEMORY(s);
368: return arr;
369: }
370:
371: /*
372: * sess_doneSession() Free resources allocated with sess_prepareSession()
373: * @s = Session
374: * @arr = Array with variables for free
375: * return: none
376: */
377: void
378: sess_doneSession(tagSess * __restrict s, array_t ** __restrict arr)
379: {
380: assert(s);
381: if (!s) {
382: sess_SetErr(EINVAL, "Error:: invalid argument\n");
383: return;
384: }
385:
386: if (!s->zcopy)
387: io_arrayFree(*arr);
388: else
389: DETACH_MEMORY(s);
390: io_arrayDestroy(arr);
391: }
392:
393: /*
394: * sess_commitSession() Commit data to shared memory
395: * @s = Session
396: * @arr = Array with variables for save
397: * return -1 error or !=-1 size of stored variables into shared memory
398: */
399: int
400: sess_commitSession(tagSess * __restrict s, array_t * __restrict arr)
401: {
402: sess_hdr_t *hdr;
403: int rs, ret = 0;
404:
405: assert(s && arr);
406: if (!s || !arr) {
407: sess_SetErr(EINVAL, "Error:: invalid argument\n");
408: return -1;
409: }
410:
411: if (!s->zcopy)
412: ATTACH_MEMORY(s);
413: if (!s->addr) {
414: if (!s->zcopy)
415: DETACH_MEMORY(s);
416:
417: return -1;
418: } else
419: hdr = (sess_hdr_t*) s->addr;
420:
421: DEC_SEMAPHORE(s, rs);
422: if ((ret = io_vals2map(s->addr + sizeof(sess_hdr_t), s->eom - sizeof(sess_hdr_t), arr)) != -1) {
1.3.2.3 misho 423: hdr->hdr_magic = SESS_AIT_MAGIC;
1.3.2.1 misho 424: hdr->hdr_argc = io_arraySize(arr);
425: ret += sizeof(sess_hdr_t);
426: }
427: ADD_SEMAPHORE(s, rs);
428:
429: if (!s->zcopy)
430: DETACH_MEMORY(s);
431: return ret;
432: }
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