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00026 #include "asterisk.h"
00027
00028 ASTERISK_FILE_VERSION(__FILE__, "$Revision: 93377 $")
00029
00030 #include <ctype.h>
00031 #include <string.h>
00032 #include <unistd.h>
00033 #include <stdlib.h>
00034 #include <errno.h>
00035 #include <stdarg.h>
00036 #include <stdio.h>
00037 #include <sys/types.h>
00038 #include <sys/socket.h>
00039 #include <netinet/in.h>
00040 #include <arpa/inet.h>
00041
00042 #define AST_API_MODULE
00043 #include "asterisk/lock.h"
00044 #include "asterisk/io.h"
00045 #include "asterisk/logger.h"
00046 #include "asterisk/md5.h"
00047 #include "asterisk/sha1.h"
00048 #include "asterisk/options.h"
00049 #include "asterisk/cli.h"
00050 #include "asterisk/linkedlists.h"
00051
00052 #define AST_API_MODULE
00053 #include "asterisk/strings.h"
00054
00055 #define AST_API_MODULE
00056 #include "asterisk/time.h"
00057
00058 #define AST_API_MODULE
00059 #include "asterisk/stringfields.h"
00060
00061 #define AST_API_MODULE
00062 #include "asterisk/utils.h"
00063
00064 #define AST_API_MODULE
00065 #include "asterisk/threadstorage.h"
00066
00067 static char base64[64];
00068 static char b2a[256];
00069
00070 AST_THREADSTORAGE(inet_ntoa_buf, inet_ntoa_buf_init);
00071
00072 #if !defined(HAVE_GETHOSTBYNAME_R_5) && !defined(HAVE_GETHOSTBYNAME_R_6)
00073
00074 #define ERANGE 34
00075 #undef gethostbyname
00076
00077 AST_MUTEX_DEFINE_STATIC(__mutex);
00078
00079
00080
00081
00082
00083
00084 static int gethostbyname_r (const char *name, struct hostent *ret, char *buf,
00085 size_t buflen, struct hostent **result,
00086 int *h_errnop)
00087 {
00088 int hsave;
00089 struct hostent *ph;
00090 ast_mutex_lock(&__mutex);
00091 hsave = h_errno;
00092
00093 ph = gethostbyname(name);
00094 *h_errnop = h_errno;
00095 if (ph == NULL) {
00096 *result = NULL;
00097 } else {
00098 char **p, **q;
00099 char *pbuf;
00100 int nbytes=0;
00101 int naddr=0, naliases=0;
00102
00103
00104
00105 for (p = ph->h_addr_list; *p != 0; p++) {
00106 nbytes += ph->h_length;
00107 nbytes += sizeof(*p);
00108 naddr++;
00109 }
00110 nbytes += sizeof(*p);
00111
00112
00113 for (p = ph->h_aliases; *p != 0; p++) {
00114 nbytes += (strlen(*p)+1);
00115 nbytes += sizeof(*p);
00116 naliases++;
00117 }
00118 nbytes += sizeof(*p);
00119
00120
00121
00122 if (nbytes > buflen) {
00123 *result = NULL;
00124 ast_mutex_unlock(&__mutex);
00125 return ERANGE;
00126 }
00127
00128
00129
00130
00131
00132
00133
00134
00135
00136
00137
00138
00139
00140
00141 *ret = *ph;
00142
00143
00144 q = (char **)buf;
00145 ret->h_addr_list = q;
00146 pbuf = buf + ((naddr + naliases + 2) * sizeof(*p));
00147 for (p = ph->h_addr_list; *p != 0; p++) {
00148 memcpy(pbuf, *p, ph->h_length);
00149 *q++ = pbuf;
00150 pbuf += ph->h_length;
00151 }
00152 *q++ = NULL;
00153
00154
00155 ret->h_aliases = q;
00156 for (p = ph->h_aliases; *p != 0; p++) {
00157 strcpy(pbuf, *p);
00158 *q++ = pbuf;
00159 pbuf += strlen(*p);
00160 *pbuf++ = 0;
00161 }
00162 *q++ = NULL;
00163
00164 strcpy(pbuf, ph->h_name);
00165 ret->h_name = pbuf;
00166 pbuf += strlen(ph->h_name);
00167 *pbuf++ = 0;
00168
00169 *result = ret;
00170
00171 }
00172 h_errno = hsave;
00173 ast_mutex_unlock(&__mutex);
00174
00175 return (*result == NULL);
00176 }
00177
00178
00179 #endif
00180
00181
00182
00183
00184 struct hostent *ast_gethostbyname(const char *host, struct ast_hostent *hp)
00185 {
00186 int res;
00187 int herrno;
00188 int dots=0;
00189 const char *s;
00190 struct hostent *result = NULL;
00191
00192
00193
00194
00195 s = host;
00196 res = 0;
00197 while(s && *s) {
00198 if (*s == '.')
00199 dots++;
00200 else if (!isdigit(*s))
00201 break;
00202 s++;
00203 }
00204 if (!s || !*s) {
00205
00206 if (dots != 3)
00207 return NULL;
00208 memset(hp, 0, sizeof(struct ast_hostent));
00209 hp->hp.h_addrtype = AF_INET;
00210 hp->hp.h_addr_list = (void *) hp->buf;
00211 hp->hp.h_addr = hp->buf + sizeof(void *);
00212 if (inet_pton(AF_INET, host, hp->hp.h_addr) > 0)
00213 return &hp->hp;
00214 return NULL;
00215
00216 }
00217 #ifdef HAVE_GETHOSTBYNAME_R_5
00218 result = gethostbyname_r(host, &hp->hp, hp->buf, sizeof(hp->buf), &herrno);
00219
00220 if (!result || !hp->hp.h_addr_list || !hp->hp.h_addr_list[0])
00221 return NULL;
00222 #else
00223 res = gethostbyname_r(host, &hp->hp, hp->buf, sizeof(hp->buf), &result, &herrno);
00224
00225 if (res || !result || !hp->hp.h_addr_list || !hp->hp.h_addr_list[0])
00226 return NULL;
00227 #endif
00228 return &hp->hp;
00229 }
00230
00231
00232
00233 AST_MUTEX_DEFINE_STATIC(test_lock);
00234 AST_MUTEX_DEFINE_STATIC(test_lock2);
00235 static pthread_t test_thread;
00236 static int lock_count = 0;
00237 static int test_errors = 0;
00238
00239
00240
00241
00242 static void *test_thread_body(void *data)
00243 {
00244 ast_mutex_lock(&test_lock);
00245 lock_count += 10;
00246 if (lock_count != 10)
00247 test_errors++;
00248 ast_mutex_lock(&test_lock);
00249 lock_count += 10;
00250 if (lock_count != 20)
00251 test_errors++;
00252 ast_mutex_lock(&test_lock2);
00253 ast_mutex_unlock(&test_lock);
00254 lock_count -= 10;
00255 if (lock_count != 10)
00256 test_errors++;
00257 ast_mutex_unlock(&test_lock);
00258 lock_count -= 10;
00259 ast_mutex_unlock(&test_lock2);
00260 if (lock_count != 0)
00261 test_errors++;
00262 return NULL;
00263 }
00264
00265 int test_for_thread_safety(void)
00266 {
00267 ast_mutex_lock(&test_lock2);
00268 ast_mutex_lock(&test_lock);
00269 lock_count += 1;
00270 ast_mutex_lock(&test_lock);
00271 lock_count += 1;
00272 ast_pthread_create(&test_thread, NULL, test_thread_body, NULL);
00273 usleep(100);
00274 if (lock_count != 2)
00275 test_errors++;
00276 ast_mutex_unlock(&test_lock);
00277 lock_count -= 1;
00278 usleep(100);
00279 if (lock_count != 1)
00280 test_errors++;
00281 ast_mutex_unlock(&test_lock);
00282 lock_count -= 1;
00283 if (lock_count != 0)
00284 test_errors++;
00285 ast_mutex_unlock(&test_lock2);
00286 usleep(100);
00287 if (lock_count != 0)
00288 test_errors++;
00289 pthread_join(test_thread, NULL);
00290 return(test_errors);
00291 }
00292
00293
00294 void ast_md5_hash(char *output, char *input)
00295 {
00296 struct MD5Context md5;
00297 unsigned char digest[16];
00298 char *ptr;
00299 int x;
00300
00301 MD5Init(&md5);
00302 MD5Update(&md5, (unsigned char *)input, strlen(input));
00303 MD5Final(digest, &md5);
00304 ptr = output;
00305 for (x = 0; x < 16; x++)
00306 ptr += sprintf(ptr, "%2.2x", digest[x]);
00307 }
00308
00309
00310 void ast_sha1_hash(char *output, char *input)
00311 {
00312 struct SHA1Context sha;
00313 char *ptr;
00314 int x;
00315 uint8_t Message_Digest[20];
00316
00317 SHA1Reset(&sha);
00318
00319 SHA1Input(&sha, (const unsigned char *) input, strlen(input));
00320
00321 SHA1Result(&sha, Message_Digest);
00322 ptr = output;
00323 for (x = 0; x < 20; x++)
00324 ptr += sprintf(ptr, "%2.2x", Message_Digest[x]);
00325 }
00326
00327
00328 int ast_base64decode(unsigned char *dst, const char *src, int max)
00329 {
00330 int cnt = 0;
00331 unsigned int byte = 0;
00332 unsigned int bits = 0;
00333 int incnt = 0;
00334 while(*src && (cnt < max)) {
00335
00336 byte <<= 6;
00337 byte |= (b2a[(int)(*src)]) & 0x3f;
00338 bits += 6;
00339 src++;
00340 incnt++;
00341
00342
00343 if (bits >= 8) {
00344 bits -= 8;
00345 *dst = (byte >> bits) & 0xff;
00346 dst++;
00347 cnt++;
00348 }
00349 }
00350
00351 return cnt;
00352 }
00353
00354
00355 int ast_base64encode_full(char *dst, const unsigned char *src, int srclen, int max, int linebreaks)
00356 {
00357 int cnt = 0;
00358 int col = 0;
00359 unsigned int byte = 0;
00360 int bits = 0;
00361 int cntin = 0;
00362
00363 max--;
00364 while ((cntin < srclen) && (cnt < max)) {
00365 byte <<= 8;
00366 byte |= *(src++);
00367 bits += 8;
00368 cntin++;
00369 if ((bits == 24) && (cnt + 4 <= max)) {
00370 *dst++ = base64[(byte >> 18) & 0x3f];
00371 *dst++ = base64[(byte >> 12) & 0x3f];
00372 *dst++ = base64[(byte >> 6) & 0x3f];
00373 *dst++ = base64[byte & 0x3f];
00374 cnt += 4;
00375 col += 4;
00376 bits = 0;
00377 byte = 0;
00378 }
00379 if (linebreaks && (cnt < max) && (col == 64)) {
00380 *dst++ = '\n';
00381 cnt++;
00382 col = 0;
00383 }
00384 }
00385 if (bits && (cnt + 4 <= max)) {
00386
00387
00388 byte <<= 24 - bits;
00389 *dst++ = base64[(byte >> 18) & 0x3f];
00390 *dst++ = base64[(byte >> 12) & 0x3f];
00391 if (bits == 16)
00392 *dst++ = base64[(byte >> 6) & 0x3f];
00393 else
00394 *dst++ = '=';
00395 *dst++ = '=';
00396 cnt += 4;
00397 }
00398 if (linebreaks && (cnt < max)) {
00399 *dst++ = '\n';
00400 cnt++;
00401 }
00402 *dst = '\0';
00403 return cnt;
00404 }
00405
00406 int ast_base64encode(char *dst, const unsigned char *src, int srclen, int max)
00407 {
00408 return ast_base64encode_full(dst, src, srclen, max, 0);
00409 }
00410
00411 static void base64_init(void)
00412 {
00413 int x;
00414 memset(b2a, -1, sizeof(b2a));
00415
00416 for (x = 0; x < 26; x++) {
00417
00418 base64[x] = 'A' + x;
00419 b2a['A' + x] = x;
00420
00421 base64[x + 26] = 'a' + x;
00422 b2a['a' + x] = x + 26;
00423
00424 if (x < 10) {
00425 base64[x + 52] = '0' + x;
00426 b2a['0' + x] = x + 52;
00427 }
00428 }
00429 base64[62] = '+';
00430 base64[63] = '/';
00431 b2a[(int)'+'] = 62;
00432 b2a[(int)'/'] = 63;
00433 }
00434
00435
00436
00437
00438
00439
00440
00441
00442
00443
00444
00445
00446
00447 char *ast_uri_encode(const char *string, char *outbuf, int buflen, int doreserved)
00448 {
00449 char *reserved = ";/?:@&=+$, ";
00450
00451 const char *ptr = string;
00452 char *out = NULL;
00453 char *buf = NULL;
00454
00455 ast_copy_string(outbuf, string, buflen);
00456
00457
00458 while (*ptr) {
00459 if (((unsigned char) *ptr) > 127 || (doreserved && strchr(reserved, *ptr)) ) {
00460
00461 if (!buf) {
00462 buf = outbuf;
00463 out = buf + (ptr - string) ;
00464 }
00465 out += sprintf(out, "%%%02x", (unsigned char) *ptr);
00466 } else if (buf) {
00467 *out = *ptr;
00468 out++;
00469 }
00470 ptr++;
00471 }
00472 if (buf)
00473 *out = '\0';
00474 return outbuf;
00475 }
00476
00477
00478 void ast_uri_decode(char *s)
00479 {
00480 char *o;
00481 unsigned int tmp;
00482
00483 for (o = s; *s; s++, o++) {
00484 if (*s == '%' && strlen(s) > 2 && sscanf(s + 1, "%2x", &tmp) == 1) {
00485
00486 *o = tmp;
00487 s += 2;
00488 } else
00489 *o = *s;
00490 }
00491 *o = '\0';
00492 }
00493
00494
00495 const char *ast_inet_ntoa(struct in_addr ia)
00496 {
00497 char *buf;
00498
00499 if (!(buf = ast_threadstorage_get(&inet_ntoa_buf, INET_ADDRSTRLEN)))
00500 return "";
00501
00502 return inet_ntop(AF_INET, &ia, buf, INET_ADDRSTRLEN);
00503 }
00504
00505 #ifndef __linux__
00506 #undef pthread_create
00507 #endif
00508
00509 #if !defined(LOW_MEMORY)
00510
00511 #ifdef DEBUG_THREADS
00512
00513
00514 #define AST_MAX_LOCKS 32
00515
00516
00517 #undef pthread_mutex_t
00518 #undef pthread_mutex_lock
00519 #undef pthread_mutex_unlock
00520 #undef pthread_mutex_init
00521 #undef pthread_mutex_destroy
00522
00523
00524
00525
00526
00527
00528 struct thr_lock_info {
00529
00530 pthread_t thread_id;
00531
00532 const char *thread_name;
00533
00534 struct {
00535 const char *file;
00536 int line_num;
00537 const char *func;
00538 const char *lock_name;
00539 void *lock_addr;
00540 int times_locked;
00541 enum ast_lock_type type;
00542
00543 int pending:2;
00544 } locks[AST_MAX_LOCKS];
00545
00546
00547
00548 unsigned int num_locks;
00549
00550
00551 pthread_mutex_t lock;
00552 AST_LIST_ENTRY(thr_lock_info) entry;
00553 };
00554
00555
00556
00557
00558 AST_MUTEX_DEFINE_STATIC(lock_infos_lock);
00559
00560
00561
00562 static AST_LIST_HEAD_NOLOCK_STATIC(lock_infos, thr_lock_info);
00563
00564
00565
00566
00567
00568
00569 static void lock_info_destroy(void *data)
00570 {
00571 struct thr_lock_info *lock_info = data;
00572
00573 pthread_mutex_lock(&lock_infos_lock.mutex);
00574 AST_LIST_REMOVE(&lock_infos, lock_info, entry);
00575 pthread_mutex_unlock(&lock_infos_lock.mutex);
00576
00577 pthread_mutex_destroy(&lock_info->lock);
00578 free((void *) lock_info->thread_name);
00579 free(lock_info);
00580 }
00581
00582
00583
00584
00585 AST_THREADSTORAGE_CUSTOM(thread_lock_info, thread_lock_info_init, lock_info_destroy);
00586
00587 void ast_store_lock_info(enum ast_lock_type type, const char *filename,
00588 int line_num, const char *func, const char *lock_name, void *lock_addr)
00589 {
00590 struct thr_lock_info *lock_info;
00591 int i;
00592
00593 if (!(lock_info = ast_threadstorage_get(&thread_lock_info, sizeof(*lock_info))))
00594 return;
00595
00596 pthread_mutex_lock(&lock_info->lock);
00597
00598 for (i = 0; i < lock_info->num_locks; i++) {
00599 if (lock_info->locks[i].lock_addr == lock_addr) {
00600 lock_info->locks[i].times_locked++;
00601 pthread_mutex_unlock(&lock_info->lock);
00602 return;
00603 }
00604 }
00605
00606 if (lock_info->num_locks == AST_MAX_LOCKS) {
00607
00608 fprintf(stderr, "XXX ERROR XXX A thread holds more locks than '%d'."
00609 " Increase AST_MAX_LOCKS!\n", AST_MAX_LOCKS);
00610 pthread_mutex_unlock(&lock_info->lock);
00611 return;
00612 }
00613
00614 lock_info->locks[i].file = filename;
00615 lock_info->locks[i].line_num = line_num;
00616 lock_info->locks[i].func = func;
00617 lock_info->locks[i].lock_name = lock_name;
00618 lock_info->locks[i].lock_addr = lock_addr;
00619 lock_info->locks[i].times_locked = 1;
00620 lock_info->locks[i].type = type;
00621 lock_info->locks[i].pending = 1;
00622 lock_info->num_locks++;
00623
00624 pthread_mutex_unlock(&lock_info->lock);
00625 }
00626
00627 void ast_mark_lock_acquired(void)
00628 {
00629 struct thr_lock_info *lock_info;
00630
00631 if (!(lock_info = ast_threadstorage_get(&thread_lock_info, sizeof(*lock_info))))
00632 return;
00633
00634 pthread_mutex_lock(&lock_info->lock);
00635 lock_info->locks[lock_info->num_locks - 1].pending = 0;
00636 pthread_mutex_unlock(&lock_info->lock);
00637 }
00638
00639 void ast_mark_lock_failed(void)
00640 {
00641 struct thr_lock_info *lock_info;
00642
00643 if (!(lock_info = ast_threadstorage_get(&thread_lock_info, sizeof(*lock_info))))
00644 return;
00645
00646 pthread_mutex_lock(&lock_info->lock);
00647 lock_info->locks[lock_info->num_locks - 1].pending = -1;
00648 lock_info->locks[lock_info->num_locks - 1].times_locked--;
00649 pthread_mutex_unlock(&lock_info->lock);
00650 }
00651
00652 void ast_remove_lock_info(void *lock_addr)
00653 {
00654 struct thr_lock_info *lock_info;
00655 int i = 0;
00656
00657 if (!(lock_info = ast_threadstorage_get(&thread_lock_info, sizeof(*lock_info))))
00658 return;
00659
00660 pthread_mutex_lock(&lock_info->lock);
00661
00662 for (i = lock_info->num_locks - 1; i >= 0; i--) {
00663 if (lock_info->locks[i].lock_addr == lock_addr)
00664 break;
00665 }
00666
00667 if (i == -1) {
00668
00669 pthread_mutex_unlock(&lock_info->lock);
00670 return;
00671 }
00672
00673 if (lock_info->locks[i].times_locked > 1) {
00674 lock_info->locks[i].times_locked--;
00675 pthread_mutex_unlock(&lock_info->lock);
00676 return;
00677 }
00678
00679 if (i < lock_info->num_locks - 1) {
00680
00681 memmove(&lock_info->locks[i], &lock_info->locks[i + 1],
00682 (lock_info->num_locks - (i + 1)) * sizeof(lock_info->locks[0]));
00683 }
00684
00685 lock_info->num_locks--;
00686
00687 pthread_mutex_unlock(&lock_info->lock);
00688 }
00689
00690 static const char *locktype2str(enum ast_lock_type type)
00691 {
00692 switch (type) {
00693 case AST_MUTEX:
00694 return "MUTEX";
00695 case AST_RDLOCK:
00696 return "RDLOCK";
00697 case AST_WRLOCK:
00698 return "WRLOCK";
00699 }
00700
00701 return "UNKNOWN";
00702 }
00703
00704 static int handle_show_locks(int fd, int argc, char *argv[])
00705 {
00706 struct thr_lock_info *lock_info;
00707 struct ast_dynamic_str *str;
00708
00709 if (!(str = ast_dynamic_str_create(4096)))
00710 return RESULT_FAILURE;
00711
00712 ast_dynamic_str_append(&str, 0, "\n"
00713 "=======================================================================\n"
00714 "=== Currently Held Locks ==============================================\n"
00715 "=======================================================================\n"
00716 "===\n"
00717 "=== <file> <line num> <function> <lock name> <lock addr> (times locked)\n"
00718 "===\n");
00719
00720 if (!str)
00721 return RESULT_FAILURE;
00722
00723 pthread_mutex_lock(&lock_infos_lock.mutex);
00724 AST_LIST_TRAVERSE(&lock_infos, lock_info, entry) {
00725 int i;
00726 ast_dynamic_str_append(&str, 0, "=== Thread ID: %u (%s)\n", (int) lock_info->thread_id,
00727 lock_info->thread_name);
00728 pthread_mutex_lock(&lock_info->lock);
00729 for (i = 0; str && i < lock_info->num_locks; i++) {
00730 int j;
00731 ast_mutex_t *lock;
00732
00733 ast_dynamic_str_append(&str, 0, "=== ---> %sLock #%d (%s): %s %d %s %s %p (%d)\n",
00734 lock_info->locks[i].pending > 0 ? "Waiting for " :
00735 lock_info->locks[i].pending < 0 ? "Tried and failed to get " : "", i,
00736 lock_info->locks[i].file,
00737 locktype2str(lock_info->locks[i].type),
00738 lock_info->locks[i].line_num,
00739 lock_info->locks[i].func, lock_info->locks[i].lock_name,
00740 lock_info->locks[i].lock_addr,
00741 lock_info->locks[i].times_locked);
00742
00743 if (!lock_info->locks[i].pending || lock_info->locks[i].pending == -1)
00744 continue;
00745
00746
00747 if (lock_info->locks[i].type != AST_MUTEX)
00748 continue;
00749
00750 lock = lock_info->locks[i].lock_addr;
00751
00752 ast_reentrancy_lock(lock);
00753 for (j = 0; str && j < lock->reentrancy; j++) {
00754 ast_dynamic_str_append(&str, 0, "=== --- ---> Locked Here: %s line %d (%s)\n",
00755 lock->file[j], lock->lineno[j], lock->func[j]);
00756 }
00757 ast_reentrancy_unlock(lock);
00758 }
00759 pthread_mutex_unlock(&lock_info->lock);
00760 if (!str)
00761 break;
00762 ast_dynamic_str_append(&str, 0, "=== -------------------------------------------------------------------\n"
00763 "===\n");
00764 if (!str)
00765 break;
00766 }
00767 pthread_mutex_unlock(&lock_infos_lock.mutex);
00768
00769 if (!str)
00770 return RESULT_FAILURE;
00771
00772 ast_dynamic_str_append(&str, 0, "=======================================================================\n"
00773 "\n");
00774
00775 if (!str)
00776 return RESULT_FAILURE;
00777
00778 ast_cli(fd, "%s", str->str);
00779
00780 free(str);
00781
00782 return RESULT_SUCCESS;
00783 }
00784
00785 static char show_locks_help[] =
00786 "Usage: core show locks\n"
00787 " This command is for lock debugging. It prints out which locks\n"
00788 "are owned by each active thread.\n";
00789
00790 static struct ast_cli_entry utils_cli[] = {
00791 { { "core", "show", "locks", NULL }, handle_show_locks,
00792 "Show which locks are locked by which thread", show_locks_help },
00793 };
00794
00795 #endif
00796
00797
00798
00799
00800
00801
00802
00803
00804 struct thr_arg {
00805 void *(*start_routine)(void *);
00806 void *data;
00807 char *name;
00808 };
00809
00810
00811
00812
00813
00814
00815
00816
00817 static void *dummy_start(void *data)
00818 {
00819 void *ret;
00820 struct thr_arg a = *((struct thr_arg *) data);
00821 #ifdef DEBUG_THREADS
00822 struct thr_lock_info *lock_info;
00823 pthread_mutexattr_t mutex_attr;
00824 #endif
00825
00826
00827
00828
00829
00830
00831 free(data);
00832 ast_register_thread(a.name);
00833 pthread_cleanup_push(ast_unregister_thread, (void *) pthread_self());
00834
00835 #ifdef DEBUG_THREADS
00836 if (!(lock_info = ast_threadstorage_get(&thread_lock_info, sizeof(*lock_info))))
00837 return NULL;
00838
00839 lock_info->thread_id = pthread_self();
00840 lock_info->thread_name = strdup(a.name);
00841
00842 pthread_mutexattr_init(&mutex_attr);
00843 pthread_mutexattr_settype(&mutex_attr, AST_MUTEX_KIND);
00844 pthread_mutex_init(&lock_info->lock, &mutex_attr);
00845 pthread_mutexattr_destroy(&mutex_attr);
00846
00847 pthread_mutex_lock(&lock_infos_lock.mutex);
00848 AST_LIST_INSERT_TAIL(&lock_infos, lock_info, entry);
00849 pthread_mutex_unlock(&lock_infos_lock.mutex);
00850 #endif
00851
00852 ret = a.start_routine(a.data);
00853
00854 pthread_cleanup_pop(1);
00855
00856 return ret;
00857 }
00858
00859 #endif
00860
00861 int ast_pthread_create_stack(pthread_t *thread, pthread_attr_t *attr, void *(*start_routine)(void *),
00862 void *data, size_t stacksize, const char *file, const char *caller,
00863 int line, const char *start_fn)
00864 {
00865 #if !defined(LOW_MEMORY)
00866 struct thr_arg *a;
00867 #endif
00868
00869 if (!attr) {
00870 attr = alloca(sizeof(*attr));
00871 pthread_attr_init(attr);
00872 }
00873
00874 #ifdef __linux__
00875
00876
00877
00878
00879
00880
00881
00882 if ((errno = pthread_attr_setinheritsched(attr, PTHREAD_INHERIT_SCHED)))
00883 ast_log(LOG_WARNING, "pthread_attr_setinheritsched: %s\n", strerror(errno));
00884 #endif
00885
00886 if (!stacksize)
00887 stacksize = AST_STACKSIZE;
00888
00889 if ((errno = pthread_attr_setstacksize(attr, stacksize ? stacksize : AST_STACKSIZE)))
00890 ast_log(LOG_WARNING, "pthread_attr_setstacksize: %s\n", strerror(errno));
00891
00892 #if !defined(LOW_MEMORY)
00893 if ((a = ast_malloc(sizeof(*a)))) {
00894 a->start_routine = start_routine;
00895 a->data = data;
00896 start_routine = dummy_start;
00897 asprintf(&a->name, "%-20s started at [%5d] %s %s()",
00898 start_fn, line, file, caller);
00899 data = a;
00900 }
00901 #endif
00902
00903 return pthread_create(thread, attr, start_routine, data);
00904 }
00905
00906 int ast_wait_for_input(int fd, int ms)
00907 {
00908 struct pollfd pfd[1];
00909 memset(pfd, 0, sizeof(pfd));
00910 pfd[0].fd = fd;
00911 pfd[0].events = POLLIN|POLLPRI;
00912 return poll(pfd, 1, ms);
00913 }
00914
00915 int ast_carefulwrite(int fd, char *s, int len, int timeoutms)
00916 {
00917
00918
00919 int res = 0;
00920 struct pollfd fds[1];
00921 while (len) {
00922 res = write(fd, s, len);
00923 if ((res < 0) && (errno != EAGAIN)) {
00924 return -1;
00925 }
00926 if (res < 0)
00927 res = 0;
00928 len -= res;
00929 s += res;
00930 res = 0;
00931 if (len) {
00932 fds[0].fd = fd;
00933 fds[0].events = POLLOUT;
00934
00935 res = poll(fds, 1, timeoutms);
00936 if (res < 1)
00937 return -1;
00938 }
00939 }
00940 return res;
00941 }
00942
00943 char *ast_strip_quoted(char *s, const char *beg_quotes, const char *end_quotes)
00944 {
00945 char *e;
00946 char *q;
00947
00948 s = ast_strip(s);
00949 if ((q = strchr(beg_quotes, *s)) && *q != '\0') {
00950 e = s + strlen(s) - 1;
00951 if (*e == *(end_quotes + (q - beg_quotes))) {
00952 s++;
00953 *e = '\0';
00954 }
00955 }
00956
00957 return s;
00958 }
00959
00960 char *ast_unescape_semicolon(char *s)
00961 {
00962 char *e;
00963 char *work = s;
00964
00965 while ((e = strchr(work, ';'))) {
00966 if ((e > work) && (*(e-1) == '\\')) {
00967 memmove(e - 1, e, strlen(e) + 1);
00968 work = e;
00969 } else {
00970 work = e + 1;
00971 }
00972 }
00973
00974 return s;
00975 }
00976
00977 int ast_build_string_va(char **buffer, size_t *space, const char *fmt, va_list ap)
00978 {
00979 int result;
00980
00981 if (!buffer || !*buffer || !space || !*space)
00982 return -1;
00983
00984 result = vsnprintf(*buffer, *space, fmt, ap);
00985
00986 if (result < 0)
00987 return -1;
00988 else if (result > *space)
00989 result = *space;
00990
00991 *buffer += result;
00992 *space -= result;
00993 return 0;
00994 }
00995
00996 int ast_build_string(char **buffer, size_t *space, const char *fmt, ...)
00997 {
00998 va_list ap;
00999 int result;
01000
01001 va_start(ap, fmt);
01002 result = ast_build_string_va(buffer, space, fmt, ap);
01003 va_end(ap);
01004
01005 return result;
01006 }
01007
01008 int ast_true(const char *s)
01009 {
01010 if (ast_strlen_zero(s))
01011 return 0;
01012
01013
01014 if (!strcasecmp(s, "yes") ||
01015 !strcasecmp(s, "true") ||
01016 !strcasecmp(s, "y") ||
01017 !strcasecmp(s, "t") ||
01018 !strcasecmp(s, "1") ||
01019 !strcasecmp(s, "on"))
01020 return -1;
01021
01022 return 0;
01023 }
01024
01025 int ast_false(const char *s)
01026 {
01027 if (ast_strlen_zero(s))
01028 return 0;
01029
01030
01031 if (!strcasecmp(s, "no") ||
01032 !strcasecmp(s, "false") ||
01033 !strcasecmp(s, "n") ||
01034 !strcasecmp(s, "f") ||
01035 !strcasecmp(s, "0") ||
01036 !strcasecmp(s, "off"))
01037 return -1;
01038
01039 return 0;
01040 }
01041
01042 #define ONE_MILLION 1000000
01043
01044
01045
01046
01047 static struct timeval tvfix(struct timeval a)
01048 {
01049 if (a.tv_usec >= ONE_MILLION) {
01050 ast_log(LOG_WARNING, "warning too large timestamp %ld.%ld\n",
01051 a.tv_sec, (long int) a.tv_usec);
01052 a.tv_sec += a.tv_usec / ONE_MILLION;
01053 a.tv_usec %= ONE_MILLION;
01054 } else if (a.tv_usec < 0) {
01055 ast_log(LOG_WARNING, "warning negative timestamp %ld.%ld\n",
01056 a.tv_sec, (long int) a.tv_usec);
01057 a.tv_usec = 0;
01058 }
01059 return a;
01060 }
01061
01062 struct timeval ast_tvadd(struct timeval a, struct timeval b)
01063 {
01064
01065 a = tvfix(a);
01066 b = tvfix(b);
01067 a.tv_sec += b.tv_sec;
01068 a.tv_usec += b.tv_usec;
01069 if (a.tv_usec >= ONE_MILLION) {
01070 a.tv_sec++;
01071 a.tv_usec -= ONE_MILLION;
01072 }
01073 return a;
01074 }
01075
01076 struct timeval ast_tvsub(struct timeval a, struct timeval b)
01077 {
01078
01079 a = tvfix(a);
01080 b = tvfix(b);
01081 a.tv_sec -= b.tv_sec;
01082 a.tv_usec -= b.tv_usec;
01083 if (a.tv_usec < 0) {
01084 a.tv_sec-- ;
01085 a.tv_usec += ONE_MILLION;
01086 }
01087 return a;
01088 }
01089 #undef ONE_MILLION
01090
01091
01092
01093 #ifndef linux
01094
01095 AST_MUTEX_DEFINE_STATIC(randomlock);
01096
01097 long int ast_random(void)
01098 {
01099 long int res;
01100 ast_mutex_lock(&randomlock);
01101 res = random();
01102 ast_mutex_unlock(&randomlock);
01103 return res;
01104 }
01105 #endif
01106
01107 char *ast_process_quotes_and_slashes(char *start, char find, char replace_with)
01108 {
01109 char *dataPut = start;
01110 int inEscape = 0;
01111 int inQuotes = 0;
01112
01113 for (; *start; start++) {
01114 if (inEscape) {
01115 *dataPut++ = *start;
01116 inEscape = 0;
01117 } else {
01118 if (*start == '\\') {
01119 inEscape = 1;
01120 } else if (*start == '\'') {
01121 inQuotes = 1 - inQuotes;
01122 } else {
01123
01124 *dataPut++ = inQuotes ? *start : ((*start == find) ? replace_with : *start);
01125 }
01126 }
01127 }
01128 if (start != dataPut)
01129 *dataPut = 0;
01130 return dataPut;
01131 }
01132
01133 void ast_join(char *s, size_t len, char * const w[])
01134 {
01135 int x, ofs = 0;
01136 const char *src;
01137
01138
01139 if (!s)
01140 return;
01141 for (x = 0; ofs < len && w[x]; x++) {
01142 if (x > 0)
01143 s[ofs++] = ' ';
01144 for (src = w[x]; *src && ofs < len; src++)
01145 s[ofs++] = *src;
01146 }
01147 if (ofs == len)
01148 ofs--;
01149 s[ofs] = '\0';
01150 }
01151
01152 const char __ast_string_field_empty[] = "";
01153
01154 static int add_string_pool(struct ast_string_field_mgr *mgr, size_t size)
01155 {
01156 struct ast_string_field_pool *pool;
01157
01158 if (!(pool = ast_calloc(1, sizeof(*pool) + size)))
01159 return -1;
01160
01161 pool->prev = mgr->pool;
01162 mgr->pool = pool;
01163 mgr->size = size;
01164 mgr->space = size;
01165 mgr->used = 0;
01166
01167 return 0;
01168 }
01169
01170 int __ast_string_field_init(struct ast_string_field_mgr *mgr, size_t size,
01171 ast_string_field *fields, int num_fields)
01172 {
01173 int index;
01174
01175 if (add_string_pool(mgr, size))
01176 return -1;
01177
01178 for (index = 0; index < num_fields; index++)
01179 fields[index] = __ast_string_field_empty;
01180
01181 return 0;
01182 }
01183
01184 ast_string_field __ast_string_field_alloc_space(struct ast_string_field_mgr *mgr, size_t needed,
01185 ast_string_field *fields, int num_fields)
01186 {
01187 char *result = NULL;
01188
01189 if (__builtin_expect(needed > mgr->space, 0)) {
01190 size_t new_size = mgr->size * 2;
01191
01192 while (new_size < needed)
01193 new_size *= 2;
01194
01195 if (add_string_pool(mgr, new_size))
01196 return NULL;
01197 }
01198
01199 result = mgr->pool->base + mgr->used;
01200 mgr->used += needed;
01201 mgr->space -= needed;
01202 return result;
01203 }
01204
01205 void __ast_string_field_index_build_va(struct ast_string_field_mgr *mgr,
01206 ast_string_field *fields, int num_fields,
01207 int index, const char *format, va_list ap1, va_list ap2)
01208 {
01209 size_t needed;
01210
01211 needed = vsnprintf(mgr->pool->base + mgr->used, mgr->space, format, ap1) + 1;
01212
01213 va_end(ap1);
01214
01215 if (needed > mgr->space) {
01216 size_t new_size = mgr->size * 2;
01217
01218 while (new_size < needed)
01219 new_size *= 2;
01220
01221 if (add_string_pool(mgr, new_size))
01222 return;
01223
01224 vsprintf(mgr->pool->base + mgr->used, format, ap2);
01225 }
01226
01227 fields[index] = mgr->pool->base + mgr->used;
01228 mgr->used += needed;
01229 mgr->space -= needed;
01230 }
01231
01232 void __ast_string_field_index_build(struct ast_string_field_mgr *mgr,
01233 ast_string_field *fields, int num_fields,
01234 int index, const char *format, ...)
01235 {
01236 va_list ap1, ap2;
01237
01238 va_start(ap1, format);
01239 va_start(ap2, format);
01240
01241 __ast_string_field_index_build_va(mgr, fields, num_fields, index, format, ap1, ap2);
01242
01243 va_end(ap1);
01244 va_end(ap2);
01245 }
01246
01247 AST_MUTEX_DEFINE_STATIC(fetchadd_m);
01248
01249 int ast_atomic_fetchadd_int_slow(volatile int *p, int v)
01250 {
01251 int ret;
01252 ast_mutex_lock(&fetchadd_m);
01253 ret = *p;
01254 *p += v;
01255 ast_mutex_unlock(&fetchadd_m);
01256 return ret;
01257 }
01258
01259
01260
01261
01262 int ast_get_time_t(const char *src, time_t *dst, time_t _default, int *consumed)
01263 {
01264 long t;
01265 int scanned;
01266
01267 if (dst == NULL)
01268 return -1;
01269
01270 *dst = _default;
01271
01272 if (ast_strlen_zero(src))
01273 return -1;
01274
01275
01276 if (sscanf(src, "%ld%n", &t, &scanned) == 1) {
01277 *dst = t;
01278 if (consumed)
01279 *consumed = scanned;
01280 return 0;
01281 } else
01282 return -1;
01283 }
01284
01285 int ast_dynamic_str_thread_build_va(struct ast_dynamic_str **buf, size_t max_len,
01286 struct ast_threadstorage *ts, int append, const char *fmt, va_list ap)
01287 {
01288 int res;
01289 int offset = (append && (*buf)->len) ? strlen((*buf)->str) : 0;
01290 #if defined(DEBUG_THREADLOCALS)
01291 struct ast_dynamic_str *old_buf = *buf;
01292 #endif
01293
01294 res = vsnprintf((*buf)->str + offset, (*buf)->len - offset, fmt, ap);
01295
01296
01297
01298
01299 if ((res + offset + 1) > (*buf)->len && (max_len ? ((*buf)->len < max_len) : 1)) {
01300
01301
01302
01303
01304 if (max_len)
01305 (*buf)->len = ((res + offset + 1) < max_len) ? (res + offset + 1) : max_len;
01306 else
01307 (*buf)->len = res + offset + 1;
01308
01309 if (!(*buf = ast_realloc(*buf, (*buf)->len + sizeof(*(*buf)))))
01310 return AST_DYNSTR_BUILD_FAILED;
01311
01312 if (append)
01313 (*buf)->str[offset] = '\0';
01314
01315 if (ts) {
01316 pthread_setspecific(ts->key, *buf);
01317 #if defined(DEBUG_THREADLOCALS)
01318 __ast_threadstorage_object_replace(old_buf, *buf, (*buf)->len + sizeof(*(*buf)));
01319 #endif
01320 }
01321
01322
01323
01324 return AST_DYNSTR_BUILD_RETRY;
01325 }
01326
01327 return res;
01328 }
01329
01330 void ast_enable_packet_fragmentation(int sock)
01331 {
01332 #if defined(HAVE_IP_MTU_DISCOVER)
01333 int val = IP_PMTUDISC_DONT;
01334
01335 if (setsockopt(sock, IPPROTO_IP, IP_MTU_DISCOVER, &val, sizeof(val)))
01336 ast_log(LOG_WARNING, "Unable to disable PMTU discovery. Large UDP packets may fail to be delivered when sent from this socket.\n");
01337 #endif
01338 }
01339
01340 int ast_utils_init(void)
01341 {
01342 base64_init();
01343 #ifdef DEBUG_THREADS
01344 ast_cli_register_multiple(utils_cli, sizeof(utils_cli) / sizeof(utils_cli[0]));
01345 #endif
01346 return 0;
01347 }
01348
01349