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00026 #include "asterisk.h"
00027
00028 ASTERISK_FILE_VERSION(__FILE__, "$Revision: 118953 $")
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 64
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 if (i && lock_info->locks[i - 1].pending == -1) {
00615
00616
00617
00618 i--;
00619 lock_info->num_locks--;
00620 memset(&lock_info->locks[i], 0, sizeof(lock_info->locks[0]));
00621 }
00622
00623 lock_info->locks[i].file = filename;
00624 lock_info->locks[i].line_num = line_num;
00625 lock_info->locks[i].func = func;
00626 lock_info->locks[i].lock_name = lock_name;
00627 lock_info->locks[i].lock_addr = lock_addr;
00628 lock_info->locks[i].times_locked = 1;
00629 lock_info->locks[i].type = type;
00630 lock_info->locks[i].pending = 1;
00631 lock_info->num_locks++;
00632
00633 pthread_mutex_unlock(&lock_info->lock);
00634 }
00635
00636 void ast_mark_lock_acquired(void *lock_addr)
00637 {
00638 struct thr_lock_info *lock_info;
00639
00640 if (!(lock_info = ast_threadstorage_get(&thread_lock_info, sizeof(*lock_info))))
00641 return;
00642
00643 pthread_mutex_lock(&lock_info->lock);
00644 if (lock_info->locks[lock_info->num_locks - 1].lock_addr == lock_addr) {
00645 lock_info->locks[lock_info->num_locks - 1].pending = 0;
00646 }
00647 pthread_mutex_unlock(&lock_info->lock);
00648 }
00649
00650 void ast_mark_lock_failed(void *lock_addr)
00651 {
00652 struct thr_lock_info *lock_info;
00653
00654 if (!(lock_info = ast_threadstorage_get(&thread_lock_info, sizeof(*lock_info))))
00655 return;
00656
00657 pthread_mutex_lock(&lock_info->lock);
00658 if (lock_info->locks[lock_info->num_locks - 1].lock_addr == lock_addr) {
00659 lock_info->locks[lock_info->num_locks - 1].pending = -1;
00660 lock_info->locks[lock_info->num_locks - 1].times_locked--;
00661 }
00662 pthread_mutex_unlock(&lock_info->lock);
00663 }
00664
00665 int ast_find_lock_info(void *lock_addr, const char **filename, int *lineno, const char **func, const char **mutex_name)
00666 {
00667 struct thr_lock_info *lock_info;
00668 int i = 0;
00669
00670 if (!(lock_info = ast_threadstorage_get(&thread_lock_info, sizeof(*lock_info))))
00671 return -1;
00672
00673 pthread_mutex_lock(&lock_info->lock);
00674
00675 for (i = lock_info->num_locks - 1; i >= 0; i--) {
00676 if (lock_info->locks[i].lock_addr == lock_addr)
00677 break;
00678 }
00679
00680 if (i == -1) {
00681
00682 pthread_mutex_unlock(&lock_info->lock);
00683 return -1;
00684 }
00685
00686 *filename = lock_info->locks[i].file;
00687 *lineno = lock_info->locks[i].line_num;
00688 *func = lock_info->locks[i].func;
00689 *mutex_name = lock_info->locks[i].lock_name;
00690 return 0;
00691 }
00692
00693 void ast_remove_lock_info(void *lock_addr)
00694 {
00695 struct thr_lock_info *lock_info;
00696 int i = 0;
00697
00698 if (!(lock_info = ast_threadstorage_get(&thread_lock_info, sizeof(*lock_info))))
00699 return;
00700
00701 pthread_mutex_lock(&lock_info->lock);
00702
00703 for (i = lock_info->num_locks - 1; i >= 0; i--) {
00704 if (lock_info->locks[i].lock_addr == lock_addr)
00705 break;
00706 }
00707
00708 if (i == -1) {
00709
00710 pthread_mutex_unlock(&lock_info->lock);
00711 return;
00712 }
00713
00714 if (lock_info->locks[i].times_locked > 1) {
00715 lock_info->locks[i].times_locked--;
00716 pthread_mutex_unlock(&lock_info->lock);
00717 return;
00718 }
00719
00720 if (i < lock_info->num_locks - 1) {
00721
00722 memmove(&lock_info->locks[i], &lock_info->locks[i + 1],
00723 (lock_info->num_locks - (i + 1)) * sizeof(lock_info->locks[0]));
00724 }
00725
00726 lock_info->num_locks--;
00727
00728 pthread_mutex_unlock(&lock_info->lock);
00729 }
00730
00731 static const char *locktype2str(enum ast_lock_type type)
00732 {
00733 switch (type) {
00734 case AST_MUTEX:
00735 return "MUTEX";
00736 case AST_RDLOCK:
00737 return "RDLOCK";
00738 case AST_WRLOCK:
00739 return "WRLOCK";
00740 }
00741
00742 return "UNKNOWN";
00743 }
00744
00745 static int handle_show_locks(int fd, int argc, char *argv[])
00746 {
00747 struct thr_lock_info *lock_info;
00748 struct ast_dynamic_str *str;
00749
00750 if (!(str = ast_dynamic_str_create(4096)))
00751 return RESULT_FAILURE;
00752
00753 ast_dynamic_str_append(&str, 0, "\n"
00754 "=======================================================================\n"
00755 "=== Currently Held Locks ==============================================\n"
00756 "=======================================================================\n"
00757 "===\n"
00758 "=== <file> <line num> <function> <lock name> <lock addr> (times locked)\n"
00759 "===\n");
00760
00761 if (!str)
00762 return RESULT_FAILURE;
00763
00764 pthread_mutex_lock(&lock_infos_lock.mutex);
00765 AST_LIST_TRAVERSE(&lock_infos, lock_info, entry) {
00766 int i;
00767 if (lock_info->num_locks) {
00768 ast_dynamic_str_append(&str, 0, "=== Thread ID: %u (%s)\n", (int) lock_info->thread_id,
00769 lock_info->thread_name);
00770 pthread_mutex_lock(&lock_info->lock);
00771 for (i = 0; str && i < lock_info->num_locks; i++) {
00772 int j;
00773 ast_mutex_t *lock;
00774
00775 ast_dynamic_str_append(&str, 0, "=== ---> %sLock #%d (%s): %s %d %s %s %p (%d)\n",
00776 lock_info->locks[i].pending > 0 ? "Waiting for " :
00777 lock_info->locks[i].pending < 0 ? "Tried and failed to get " : "", i,
00778 lock_info->locks[i].file,
00779 locktype2str(lock_info->locks[i].type),
00780 lock_info->locks[i].line_num,
00781 lock_info->locks[i].func, lock_info->locks[i].lock_name,
00782 lock_info->locks[i].lock_addr,
00783 lock_info->locks[i].times_locked);
00784
00785 if (!lock_info->locks[i].pending || lock_info->locks[i].pending == -1)
00786 continue;
00787
00788
00789 if (lock_info->locks[i].type != AST_MUTEX)
00790 continue;
00791
00792 lock = lock_info->locks[i].lock_addr;
00793
00794 ast_reentrancy_lock(lock);
00795 for (j = 0; str && j < lock->reentrancy; j++) {
00796 ast_dynamic_str_append(&str, 0, "=== --- ---> Locked Here: %s line %d (%s)\n",
00797 lock->file[j], lock->lineno[j], lock->func[j]);
00798 }
00799 ast_reentrancy_unlock(lock);
00800 }
00801 pthread_mutex_unlock(&lock_info->lock);
00802 if (!str)
00803 break;
00804 ast_dynamic_str_append(&str, 0, "=== -------------------------------------------------------------------\n"
00805 "===\n");
00806 if (!str)
00807 break;
00808 }
00809 }
00810 pthread_mutex_unlock(&lock_infos_lock.mutex);
00811
00812 if (!str)
00813 return RESULT_FAILURE;
00814
00815 ast_dynamic_str_append(&str, 0, "=======================================================================\n"
00816 "\n");
00817
00818 if (!str)
00819 return RESULT_FAILURE;
00820
00821 ast_cli(fd, "%s", str->str);
00822
00823 free(str);
00824
00825 return RESULT_SUCCESS;
00826 }
00827
00828 static char show_locks_help[] =
00829 "Usage: core show locks\n"
00830 " This command is for lock debugging. It prints out which locks\n"
00831 "are owned by each active thread.\n";
00832
00833 static struct ast_cli_entry utils_cli[] = {
00834 { { "core", "show", "locks", NULL }, handle_show_locks,
00835 "Show which locks are locked by which thread", show_locks_help },
00836 };
00837
00838 #endif
00839
00840
00841
00842
00843
00844
00845
00846
00847 struct thr_arg {
00848 void *(*start_routine)(void *);
00849 void *data;
00850 char *name;
00851 };
00852
00853
00854
00855
00856
00857
00858
00859
00860 static void *dummy_start(void *data)
00861 {
00862 void *ret;
00863 struct thr_arg a = *((struct thr_arg *) data);
00864 #ifdef DEBUG_THREADS
00865 struct thr_lock_info *lock_info;
00866 pthread_mutexattr_t mutex_attr;
00867 #endif
00868
00869
00870
00871
00872
00873
00874 free(data);
00875 ast_register_thread(a.name);
00876 pthread_cleanup_push(ast_unregister_thread, (void *) pthread_self());
00877
00878 #ifdef DEBUG_THREADS
00879 if (!(lock_info = ast_threadstorage_get(&thread_lock_info, sizeof(*lock_info))))
00880 return NULL;
00881
00882 lock_info->thread_id = pthread_self();
00883 lock_info->thread_name = strdup(a.name);
00884
00885 pthread_mutexattr_init(&mutex_attr);
00886 pthread_mutexattr_settype(&mutex_attr, AST_MUTEX_KIND);
00887 pthread_mutex_init(&lock_info->lock, &mutex_attr);
00888 pthread_mutexattr_destroy(&mutex_attr);
00889
00890 pthread_mutex_lock(&lock_infos_lock.mutex);
00891 AST_LIST_INSERT_TAIL(&lock_infos, lock_info, entry);
00892 pthread_mutex_unlock(&lock_infos_lock.mutex);
00893 #endif
00894
00895 ret = a.start_routine(a.data);
00896
00897 pthread_cleanup_pop(1);
00898
00899 return ret;
00900 }
00901
00902 #endif
00903
00904 int ast_pthread_create_stack(pthread_t *thread, pthread_attr_t *attr, void *(*start_routine)(void *),
00905 void *data, size_t stacksize, const char *file, const char *caller,
00906 int line, const char *start_fn)
00907 {
00908 #if !defined(LOW_MEMORY)
00909 struct thr_arg *a;
00910 #endif
00911
00912 if (!attr) {
00913 attr = alloca(sizeof(*attr));
00914 pthread_attr_init(attr);
00915 }
00916
00917 #ifdef __linux__
00918
00919
00920
00921
00922
00923
00924
00925 if ((errno = pthread_attr_setinheritsched(attr, PTHREAD_INHERIT_SCHED)))
00926 ast_log(LOG_WARNING, "pthread_attr_setinheritsched: %s\n", strerror(errno));
00927 #endif
00928
00929 if (!stacksize)
00930 stacksize = AST_STACKSIZE;
00931
00932 if ((errno = pthread_attr_setstacksize(attr, stacksize ? stacksize : AST_STACKSIZE)))
00933 ast_log(LOG_WARNING, "pthread_attr_setstacksize: %s\n", strerror(errno));
00934
00935 #if !defined(LOW_MEMORY)
00936 if ((a = ast_malloc(sizeof(*a)))) {
00937 a->start_routine = start_routine;
00938 a->data = data;
00939 start_routine = dummy_start;
00940 asprintf(&a->name, "%-20s started at [%5d] %s %s()",
00941 start_fn, line, file, caller);
00942 data = a;
00943 }
00944 #endif
00945
00946 return pthread_create(thread, attr, start_routine, data);
00947 }
00948
00949 int ast_wait_for_input(int fd, int ms)
00950 {
00951 struct pollfd pfd[1];
00952 memset(pfd, 0, sizeof(pfd));
00953 pfd[0].fd = fd;
00954 pfd[0].events = POLLIN|POLLPRI;
00955 return poll(pfd, 1, ms);
00956 }
00957
00958 int ast_carefulwrite(int fd, char *s, int len, int timeoutms)
00959 {
00960
00961
00962 int res = 0;
00963 struct pollfd fds[1];
00964 while (len) {
00965 res = write(fd, s, len);
00966 if ((res < 0) && (errno != EAGAIN)) {
00967 return -1;
00968 }
00969 if (res < 0)
00970 res = 0;
00971 len -= res;
00972 s += res;
00973 res = 0;
00974 if (len) {
00975 fds[0].fd = fd;
00976 fds[0].events = POLLOUT;
00977
00978 res = poll(fds, 1, timeoutms);
00979 if (res < 1)
00980 return -1;
00981 }
00982 }
00983 return res;
00984 }
00985
00986 char *ast_strip_quoted(char *s, const char *beg_quotes, const char *end_quotes)
00987 {
00988 char *e;
00989 char *q;
00990
00991 s = ast_strip(s);
00992 if ((q = strchr(beg_quotes, *s)) && *q != '\0') {
00993 e = s + strlen(s) - 1;
00994 if (*e == *(end_quotes + (q - beg_quotes))) {
00995 s++;
00996 *e = '\0';
00997 }
00998 }
00999
01000 return s;
01001 }
01002
01003 char *ast_unescape_semicolon(char *s)
01004 {
01005 char *e;
01006 char *work = s;
01007
01008 while ((e = strchr(work, ';'))) {
01009 if ((e > work) && (*(e-1) == '\\')) {
01010 memmove(e - 1, e, strlen(e) + 1);
01011 work = e;
01012 } else {
01013 work = e + 1;
01014 }
01015 }
01016
01017 return s;
01018 }
01019
01020 int ast_build_string_va(char **buffer, size_t *space, const char *fmt, va_list ap)
01021 {
01022 int result;
01023
01024 if (!buffer || !*buffer || !space || !*space)
01025 return -1;
01026
01027 result = vsnprintf(*buffer, *space, fmt, ap);
01028
01029 if (result < 0)
01030 return -1;
01031 else if (result > *space)
01032 result = *space;
01033
01034 *buffer += result;
01035 *space -= result;
01036 return 0;
01037 }
01038
01039 int ast_build_string(char **buffer, size_t *space, const char *fmt, ...)
01040 {
01041 va_list ap;
01042 int result;
01043
01044 va_start(ap, fmt);
01045 result = ast_build_string_va(buffer, space, fmt, ap);
01046 va_end(ap);
01047
01048 return result;
01049 }
01050
01051 int ast_true(const char *s)
01052 {
01053 if (ast_strlen_zero(s))
01054 return 0;
01055
01056
01057 if (!strcasecmp(s, "yes") ||
01058 !strcasecmp(s, "true") ||
01059 !strcasecmp(s, "y") ||
01060 !strcasecmp(s, "t") ||
01061 !strcasecmp(s, "1") ||
01062 !strcasecmp(s, "on"))
01063 return -1;
01064
01065 return 0;
01066 }
01067
01068 int ast_false(const char *s)
01069 {
01070 if (ast_strlen_zero(s))
01071 return 0;
01072
01073
01074 if (!strcasecmp(s, "no") ||
01075 !strcasecmp(s, "false") ||
01076 !strcasecmp(s, "n") ||
01077 !strcasecmp(s, "f") ||
01078 !strcasecmp(s, "0") ||
01079 !strcasecmp(s, "off"))
01080 return -1;
01081
01082 return 0;
01083 }
01084
01085 #define ONE_MILLION 1000000
01086
01087
01088
01089
01090 static struct timeval tvfix(struct timeval a)
01091 {
01092 if (a.tv_usec >= ONE_MILLION) {
01093 ast_log(LOG_WARNING, "warning too large timestamp %ld.%ld\n",
01094 a.tv_sec, (long int) a.tv_usec);
01095 a.tv_sec += a.tv_usec / ONE_MILLION;
01096 a.tv_usec %= ONE_MILLION;
01097 } else if (a.tv_usec < 0) {
01098 ast_log(LOG_WARNING, "warning negative timestamp %ld.%ld\n",
01099 a.tv_sec, (long int) a.tv_usec);
01100 a.tv_usec = 0;
01101 }
01102 return a;
01103 }
01104
01105 struct timeval ast_tvadd(struct timeval a, struct timeval b)
01106 {
01107
01108 a = tvfix(a);
01109 b = tvfix(b);
01110 a.tv_sec += b.tv_sec;
01111 a.tv_usec += b.tv_usec;
01112 if (a.tv_usec >= ONE_MILLION) {
01113 a.tv_sec++;
01114 a.tv_usec -= ONE_MILLION;
01115 }
01116 return a;
01117 }
01118
01119 struct timeval ast_tvsub(struct timeval a, struct timeval b)
01120 {
01121
01122 a = tvfix(a);
01123 b = tvfix(b);
01124 a.tv_sec -= b.tv_sec;
01125 a.tv_usec -= b.tv_usec;
01126 if (a.tv_usec < 0) {
01127 a.tv_sec-- ;
01128 a.tv_usec += ONE_MILLION;
01129 }
01130 return a;
01131 }
01132 #undef ONE_MILLION
01133
01134
01135
01136 #ifndef linux
01137
01138 AST_MUTEX_DEFINE_STATIC(randomlock);
01139
01140 long int ast_random(void)
01141 {
01142 long int res;
01143 ast_mutex_lock(&randomlock);
01144 res = random();
01145 ast_mutex_unlock(&randomlock);
01146 return res;
01147 }
01148 #endif
01149
01150 char *ast_process_quotes_and_slashes(char *start, char find, char replace_with)
01151 {
01152 char *dataPut = start;
01153 int inEscape = 0;
01154 int inQuotes = 0;
01155
01156 for (; *start; start++) {
01157 if (inEscape) {
01158 *dataPut++ = *start;
01159 inEscape = 0;
01160 } else {
01161 if (*start == '\\') {
01162 inEscape = 1;
01163 } else if (*start == '\'') {
01164 inQuotes = 1 - inQuotes;
01165 } else {
01166
01167 *dataPut++ = inQuotes ? *start : ((*start == find) ? replace_with : *start);
01168 }
01169 }
01170 }
01171 if (start != dataPut)
01172 *dataPut = 0;
01173 return dataPut;
01174 }
01175
01176 void ast_join(char *s, size_t len, char * const w[])
01177 {
01178 int x, ofs = 0;
01179 const char *src;
01180
01181
01182 if (!s)
01183 return;
01184 for (x = 0; ofs < len && w[x]; x++) {
01185 if (x > 0)
01186 s[ofs++] = ' ';
01187 for (src = w[x]; *src && ofs < len; src++)
01188 s[ofs++] = *src;
01189 }
01190 if (ofs == len)
01191 ofs--;
01192 s[ofs] = '\0';
01193 }
01194
01195 const char __ast_string_field_empty[] = "";
01196
01197 static int add_string_pool(struct ast_string_field_mgr *mgr, size_t size)
01198 {
01199 struct ast_string_field_pool *pool;
01200
01201 if (!(pool = ast_calloc(1, sizeof(*pool) + size)))
01202 return -1;
01203
01204 pool->prev = mgr->pool;
01205 mgr->pool = pool;
01206 mgr->size = size;
01207 mgr->space = size;
01208 mgr->used = 0;
01209
01210 return 0;
01211 }
01212
01213 int __ast_string_field_init(struct ast_string_field_mgr *mgr, size_t size,
01214 ast_string_field *fields, int num_fields)
01215 {
01216 int index;
01217
01218 if (add_string_pool(mgr, size))
01219 return -1;
01220
01221 for (index = 0; index < num_fields; index++)
01222 fields[index] = __ast_string_field_empty;
01223
01224 return 0;
01225 }
01226
01227 ast_string_field __ast_string_field_alloc_space(struct ast_string_field_mgr *mgr, size_t needed,
01228 ast_string_field *fields, int num_fields)
01229 {
01230 char *result = NULL;
01231
01232 if (__builtin_expect(needed > mgr->space, 0)) {
01233 size_t new_size = mgr->size * 2;
01234
01235 while (new_size < needed)
01236 new_size *= 2;
01237
01238 if (add_string_pool(mgr, new_size))
01239 return NULL;
01240 }
01241
01242 result = mgr->pool->base + mgr->used;
01243 mgr->used += needed;
01244 mgr->space -= needed;
01245 return result;
01246 }
01247
01248 void __ast_string_field_index_build_va(struct ast_string_field_mgr *mgr,
01249 ast_string_field *fields, int num_fields,
01250 int index, const char *format, va_list ap1, va_list ap2)
01251 {
01252 size_t needed;
01253
01254 needed = vsnprintf(mgr->pool->base + mgr->used, mgr->space, format, ap1) + 1;
01255
01256 va_end(ap1);
01257
01258 if (needed > mgr->space) {
01259 size_t new_size = mgr->size * 2;
01260
01261 while (new_size < needed)
01262 new_size *= 2;
01263
01264 if (add_string_pool(mgr, new_size))
01265 return;
01266
01267 vsprintf(mgr->pool->base + mgr->used, format, ap2);
01268 }
01269
01270 fields[index] = mgr->pool->base + mgr->used;
01271 mgr->used += needed;
01272 mgr->space -= needed;
01273 }
01274
01275 void __ast_string_field_index_build(struct ast_string_field_mgr *mgr,
01276 ast_string_field *fields, int num_fields,
01277 int index, const char *format, ...)
01278 {
01279 va_list ap1, ap2;
01280
01281 va_start(ap1, format);
01282 va_start(ap2, format);
01283
01284 __ast_string_field_index_build_va(mgr, fields, num_fields, index, format, ap1, ap2);
01285
01286 va_end(ap1);
01287 va_end(ap2);
01288 }
01289
01290 AST_MUTEX_DEFINE_STATIC(fetchadd_m);
01291
01292 int ast_atomic_fetchadd_int_slow(volatile int *p, int v)
01293 {
01294 int ret;
01295 ast_mutex_lock(&fetchadd_m);
01296 ret = *p;
01297 *p += v;
01298 ast_mutex_unlock(&fetchadd_m);
01299 return ret;
01300 }
01301
01302
01303
01304
01305 int ast_get_time_t(const char *src, time_t *dst, time_t _default, int *consumed)
01306 {
01307 long t;
01308 int scanned;
01309
01310 if (dst == NULL)
01311 return -1;
01312
01313 *dst = _default;
01314
01315 if (ast_strlen_zero(src))
01316 return -1;
01317
01318
01319 if (sscanf(src, "%ld%n", &t, &scanned) == 1) {
01320 *dst = t;
01321 if (consumed)
01322 *consumed = scanned;
01323 return 0;
01324 } else
01325 return -1;
01326 }
01327
01328 int ast_dynamic_str_thread_build_va(struct ast_dynamic_str **buf, size_t max_len,
01329 struct ast_threadstorage *ts, int append, const char *fmt, va_list ap)
01330 {
01331 int res;
01332 int offset = (append && (*buf)->len) ? strlen((*buf)->str) : 0;
01333 #if defined(DEBUG_THREADLOCALS)
01334 struct ast_dynamic_str *old_buf = *buf;
01335 #endif
01336
01337 res = vsnprintf((*buf)->str + offset, (*buf)->len - offset, fmt, ap);
01338
01339
01340
01341
01342 if ((res + offset + 1) > (*buf)->len && (max_len ? ((*buf)->len < max_len) : 1)) {
01343
01344
01345
01346
01347 if (max_len)
01348 (*buf)->len = ((res + offset + 1) < max_len) ? (res + offset + 1) : max_len;
01349 else
01350 (*buf)->len = res + offset + 1;
01351
01352 if (!(*buf = ast_realloc(*buf, (*buf)->len + sizeof(*(*buf)))))
01353 return AST_DYNSTR_BUILD_FAILED;
01354
01355 if (append)
01356 (*buf)->str[offset] = '\0';
01357
01358 if (ts) {
01359 pthread_setspecific(ts->key, *buf);
01360 #if defined(DEBUG_THREADLOCALS)
01361 __ast_threadstorage_object_replace(old_buf, *buf, (*buf)->len + sizeof(*(*buf)));
01362 #endif
01363 }
01364
01365
01366
01367 return AST_DYNSTR_BUILD_RETRY;
01368 }
01369
01370 return res;
01371 }
01372
01373 void ast_enable_packet_fragmentation(int sock)
01374 {
01375 #if defined(HAVE_IP_MTU_DISCOVER)
01376 int val = IP_PMTUDISC_DONT;
01377
01378 if (setsockopt(sock, IPPROTO_IP, IP_MTU_DISCOVER, &val, sizeof(val)))
01379 ast_log(LOG_WARNING, "Unable to disable PMTU discovery. Large UDP packets may fail to be delivered when sent from this socket.\n");
01380 #endif
01381 }
01382
01383 int ast_utils_init(void)
01384 {
01385 base64_init();
01386 #ifdef DEBUG_THREADS
01387 #if !defined(LOW_MEMORY)
01388 ast_cli_register_multiple(utils_cli, sizeof(utils_cli) / sizeof(utils_cli[0]));
01389 #endif
01390 #endif
01391 return 0;
01392 }
01393
01394 #ifndef __AST_DEBUG_MALLOC
01395 int _ast_asprintf(char **ret, const char *file, int lineno, const char *func, const char *fmt, ...)
01396 {
01397 int res;
01398 va_list ap;
01399
01400 va_start(ap, fmt);
01401 if ((res = vasprintf(ret, fmt, ap)) == -1) {
01402 MALLOC_FAILURE_MSG;
01403 }
01404 va_end(ap);
01405
01406 return res;
01407 }
01408 #endif