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00025
00026 #include "asterisk.h"
00027
00028 ASTERISK_FILE_VERSION(__FILE__, "$Revision: 78095 $")
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 16
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
00542 unsigned int pending:1;
00543 } locks[AST_MAX_LOCKS];
00544
00545
00546
00547 unsigned int num_locks;
00548
00549
00550 pthread_mutex_t lock;
00551 AST_LIST_ENTRY(thr_lock_info) entry;
00552 };
00553
00554
00555
00556
00557 AST_MUTEX_DEFINE_STATIC(lock_infos_lock);
00558
00559
00560
00561 static AST_LIST_HEAD_NOLOCK_STATIC(lock_infos, thr_lock_info);
00562
00563
00564
00565
00566
00567
00568 static void lock_info_destroy(void *data)
00569 {
00570 struct thr_lock_info *lock_info = data;
00571
00572 pthread_mutex_lock(&lock_infos_lock.mutex);
00573 AST_LIST_REMOVE(&lock_infos, lock_info, entry);
00574 pthread_mutex_unlock(&lock_infos_lock.mutex);
00575
00576 pthread_mutex_destroy(&lock_info->lock);
00577 free((void *) lock_info->thread_name);
00578 free(lock_info);
00579 }
00580
00581
00582
00583
00584 AST_THREADSTORAGE_CUSTOM(thread_lock_info, thread_lock_info_init, lock_info_destroy);
00585
00586 void ast_store_lock_info(const char *filename, int line_num,
00587 const char *func, const char *lock_name, void *lock_addr)
00588 {
00589 struct thr_lock_info *lock_info;
00590 int i;
00591
00592 if (!(lock_info = ast_threadstorage_get(&thread_lock_info, sizeof(*lock_info))))
00593 return;
00594
00595 pthread_mutex_lock(&lock_info->lock);
00596
00597 for (i = 0; i < lock_info->num_locks; i++) {
00598 if (lock_info->locks[i].lock_addr == lock_addr) {
00599 lock_info->locks[i].times_locked++;
00600 pthread_mutex_unlock(&lock_info->lock);
00601 return;
00602 }
00603 }
00604
00605 if (lock_info->num_locks == AST_MAX_LOCKS) {
00606
00607 fprintf(stderr, "XXX ERROR XXX A thread holds more locks than '%d'."
00608 " Increase AST_MAX_LOCKS!\n", AST_MAX_LOCKS);
00609 pthread_mutex_unlock(&lock_info->lock);
00610 return;
00611 }
00612
00613 lock_info->locks[i].file = filename;
00614 lock_info->locks[i].line_num = line_num;
00615 lock_info->locks[i].func = func;
00616 lock_info->locks[i].lock_name = lock_name;
00617 lock_info->locks[i].lock_addr = lock_addr;
00618 lock_info->locks[i].times_locked = 1;
00619 lock_info->locks[i].pending = 1;
00620 lock_info->num_locks++;
00621
00622 pthread_mutex_unlock(&lock_info->lock);
00623 }
00624
00625 void ast_mark_lock_acquired(void)
00626 {
00627 struct thr_lock_info *lock_info;
00628
00629 if (!(lock_info = ast_threadstorage_get(&thread_lock_info, sizeof(*lock_info))))
00630 return;
00631
00632 pthread_mutex_lock(&lock_info->lock);
00633 lock_info->locks[lock_info->num_locks - 1].pending = 0;
00634 pthread_mutex_unlock(&lock_info->lock);
00635 }
00636
00637 void ast_remove_lock_info(void *lock_addr)
00638 {
00639 struct thr_lock_info *lock_info;
00640 int i = 0;
00641
00642 if (!(lock_info = ast_threadstorage_get(&thread_lock_info, sizeof(*lock_info))))
00643 return;
00644
00645 pthread_mutex_lock(&lock_info->lock);
00646
00647 for (i = lock_info->num_locks - 1; i >= 0; i--) {
00648 if (lock_info->locks[i].lock_addr == lock_addr)
00649 break;
00650 }
00651
00652 if (i == -1) {
00653
00654 pthread_mutex_unlock(&lock_info->lock);
00655 return;
00656 }
00657
00658 if (lock_info->locks[i].times_locked > 1) {
00659 lock_info->locks[i].times_locked--;
00660 pthread_mutex_unlock(&lock_info->lock);
00661 return;
00662 }
00663
00664 if (i < lock_info->num_locks - 1) {
00665
00666 memmove(&lock_info->locks[i], &lock_info->locks[i + 1],
00667 (lock_info->num_locks - (i + 1)) * sizeof(lock_info->locks[0]));
00668 }
00669
00670 lock_info->num_locks--;
00671
00672 pthread_mutex_unlock(&lock_info->lock);
00673 }
00674
00675 static int handle_show_locks(int fd, int argc, char *argv[])
00676 {
00677 struct thr_lock_info *lock_info;
00678
00679 ast_cli(fd, "\n"
00680 "=======================================================================\n"
00681 "=== Currently Held Locks ==============================================\n"
00682 "=======================================================================\n"
00683 "===\n"
00684 "=== <file> <line num> <function> <lock name> <lock addr> (times locked)\n"
00685 "===\n");
00686
00687 pthread_mutex_lock(&lock_infos_lock.mutex);
00688 AST_LIST_TRAVERSE(&lock_infos, lock_info, entry) {
00689 int i;
00690 ast_cli(fd, "=== Thread ID: %d (%s)\n", (int) lock_info->thread_id,
00691 lock_info->thread_name);
00692 pthread_mutex_lock(&lock_info->lock);
00693 for (i = 0; i < lock_info->num_locks; i++) {
00694 ast_cli(fd, "=== ---> %sLock #%d: %s %d %s %s %p (%d)\n",
00695 lock_info->locks[i].pending ? "Waiting for " : "", i,
00696 lock_info->locks[i].file, lock_info->locks[i].line_num,
00697 lock_info->locks[i].func, lock_info->locks[i].lock_name,
00698 lock_info->locks[i].lock_addr,
00699 lock_info->locks[i].times_locked);
00700 }
00701 pthread_mutex_unlock(&lock_info->lock);
00702 ast_cli(fd, "=== -------------------------------------------------------------------\n"
00703 "===\n");
00704 }
00705 pthread_mutex_unlock(&lock_infos_lock.mutex);
00706
00707 ast_cli(fd, "=======================================================================\n"
00708 "\n");
00709
00710 return 0;
00711 }
00712
00713 static char show_locks_help[] =
00714 "Usage: core show locks\n"
00715 " This command is for lock debugging. It prints out which locks\n"
00716 "are owned by each active thread.\n";
00717
00718 static struct ast_cli_entry utils_cli[] = {
00719 { { "core", "show", "locks", NULL }, handle_show_locks,
00720 "Show which locks are locked by which thread", show_locks_help },
00721 };
00722
00723 #endif
00724
00725
00726
00727
00728
00729
00730
00731
00732 struct thr_arg {
00733 void *(*start_routine)(void *);
00734 void *data;
00735 char *name;
00736 };
00737
00738
00739
00740
00741
00742
00743
00744
00745 static void *dummy_start(void *data)
00746 {
00747 void *ret;
00748 struct thr_arg a = *((struct thr_arg *) data);
00749 #ifdef DEBUG_THREADS
00750 struct thr_lock_info *lock_info;
00751 #endif
00752
00753
00754
00755
00756
00757
00758 free(data);
00759 ast_register_thread(a.name);
00760 pthread_cleanup_push(ast_unregister_thread, (void *) pthread_self());
00761
00762 #ifdef DEBUG_THREADS
00763 if (!(lock_info = ast_threadstorage_get(&thread_lock_info, sizeof(*lock_info))))
00764 return NULL;
00765
00766 lock_info->thread_id = pthread_self();
00767 lock_info->thread_name = strdup(a.name);
00768 pthread_mutex_init(&lock_info->lock, NULL);
00769
00770 pthread_mutex_lock(&lock_infos_lock.mutex);
00771 AST_LIST_INSERT_TAIL(&lock_infos, lock_info, entry);
00772 pthread_mutex_unlock(&lock_infos_lock.mutex);
00773 #endif
00774
00775 ret = a.start_routine(a.data);
00776
00777 pthread_cleanup_pop(1);
00778
00779 return ret;
00780 }
00781
00782 #endif
00783
00784 int ast_pthread_create_stack(pthread_t *thread, pthread_attr_t *attr, void *(*start_routine)(void *),
00785 void *data, size_t stacksize, const char *file, const char *caller,
00786 int line, const char *start_fn)
00787 {
00788 #if !defined(LOW_MEMORY)
00789 struct thr_arg *a;
00790 #endif
00791
00792 if (!attr) {
00793 attr = alloca(sizeof(*attr));
00794 pthread_attr_init(attr);
00795 }
00796
00797 #ifdef __linux__
00798
00799
00800
00801
00802
00803
00804
00805 if ((errno = pthread_attr_setinheritsched(attr, PTHREAD_INHERIT_SCHED)))
00806 ast_log(LOG_WARNING, "pthread_attr_setinheritsched: %s\n", strerror(errno));
00807 #endif
00808
00809 if (!stacksize)
00810 stacksize = AST_STACKSIZE;
00811
00812 if ((errno = pthread_attr_setstacksize(attr, stacksize ? stacksize : AST_STACKSIZE)))
00813 ast_log(LOG_WARNING, "pthread_attr_setstacksize: %s\n", strerror(errno));
00814
00815 #if !defined(LOW_MEMORY)
00816 if ((a = ast_malloc(sizeof(*a)))) {
00817 a->start_routine = start_routine;
00818 a->data = data;
00819 start_routine = dummy_start;
00820 asprintf(&a->name, "%-20s started at [%5d] %s %s()",
00821 start_fn, line, file, caller);
00822 data = a;
00823 }
00824 #endif
00825
00826 return pthread_create(thread, attr, start_routine, data);
00827 }
00828
00829 int ast_wait_for_input(int fd, int ms)
00830 {
00831 struct pollfd pfd[1];
00832 memset(pfd, 0, sizeof(pfd));
00833 pfd[0].fd = fd;
00834 pfd[0].events = POLLIN|POLLPRI;
00835 return poll(pfd, 1, ms);
00836 }
00837
00838 int ast_carefulwrite(int fd, char *s, int len, int timeoutms)
00839 {
00840
00841
00842 int res = 0;
00843 struct pollfd fds[1];
00844 while (len) {
00845 res = write(fd, s, len);
00846 if ((res < 0) && (errno != EAGAIN)) {
00847 return -1;
00848 }
00849 if (res < 0)
00850 res = 0;
00851 len -= res;
00852 s += res;
00853 res = 0;
00854 if (len) {
00855 fds[0].fd = fd;
00856 fds[0].events = POLLOUT;
00857
00858 res = poll(fds, 1, timeoutms);
00859 if (res < 1)
00860 return -1;
00861 }
00862 }
00863 return res;
00864 }
00865
00866 char *ast_strip_quoted(char *s, const char *beg_quotes, const char *end_quotes)
00867 {
00868 char *e;
00869 char *q;
00870
00871 s = ast_strip(s);
00872 if ((q = strchr(beg_quotes, *s)) && *q != '\0') {
00873 e = s + strlen(s) - 1;
00874 if (*e == *(end_quotes + (q - beg_quotes))) {
00875 s++;
00876 *e = '\0';
00877 }
00878 }
00879
00880 return s;
00881 }
00882
00883 int ast_build_string_va(char **buffer, size_t *space, const char *fmt, va_list ap)
00884 {
00885 int result;
00886
00887 if (!buffer || !*buffer || !space || !*space)
00888 return -1;
00889
00890 result = vsnprintf(*buffer, *space, fmt, ap);
00891
00892 if (result < 0)
00893 return -1;
00894 else if (result > *space)
00895 result = *space;
00896
00897 *buffer += result;
00898 *space -= result;
00899 return 0;
00900 }
00901
00902 int ast_build_string(char **buffer, size_t *space, const char *fmt, ...)
00903 {
00904 va_list ap;
00905 int result;
00906
00907 va_start(ap, fmt);
00908 result = ast_build_string_va(buffer, space, fmt, ap);
00909 va_end(ap);
00910
00911 return result;
00912 }
00913
00914 int ast_true(const char *s)
00915 {
00916 if (ast_strlen_zero(s))
00917 return 0;
00918
00919
00920 if (!strcasecmp(s, "yes") ||
00921 !strcasecmp(s, "true") ||
00922 !strcasecmp(s, "y") ||
00923 !strcasecmp(s, "t") ||
00924 !strcasecmp(s, "1") ||
00925 !strcasecmp(s, "on"))
00926 return -1;
00927
00928 return 0;
00929 }
00930
00931 int ast_false(const char *s)
00932 {
00933 if (ast_strlen_zero(s))
00934 return 0;
00935
00936
00937 if (!strcasecmp(s, "no") ||
00938 !strcasecmp(s, "false") ||
00939 !strcasecmp(s, "n") ||
00940 !strcasecmp(s, "f") ||
00941 !strcasecmp(s, "0") ||
00942 !strcasecmp(s, "off"))
00943 return -1;
00944
00945 return 0;
00946 }
00947
00948 #define ONE_MILLION 1000000
00949
00950
00951
00952
00953 static struct timeval tvfix(struct timeval a)
00954 {
00955 if (a.tv_usec >= ONE_MILLION) {
00956 ast_log(LOG_WARNING, "warning too large timestamp %ld.%ld\n",
00957 a.tv_sec, (long int) a.tv_usec);
00958 a.tv_sec += a.tv_usec / ONE_MILLION;
00959 a.tv_usec %= ONE_MILLION;
00960 } else if (a.tv_usec < 0) {
00961 ast_log(LOG_WARNING, "warning negative timestamp %ld.%ld\n",
00962 a.tv_sec, (long int) a.tv_usec);
00963 a.tv_usec = 0;
00964 }
00965 return a;
00966 }
00967
00968 struct timeval ast_tvadd(struct timeval a, struct timeval b)
00969 {
00970
00971 a = tvfix(a);
00972 b = tvfix(b);
00973 a.tv_sec += b.tv_sec;
00974 a.tv_usec += b.tv_usec;
00975 if (a.tv_usec >= ONE_MILLION) {
00976 a.tv_sec++;
00977 a.tv_usec -= ONE_MILLION;
00978 }
00979 return a;
00980 }
00981
00982 struct timeval ast_tvsub(struct timeval a, struct timeval b)
00983 {
00984
00985 a = tvfix(a);
00986 b = tvfix(b);
00987 a.tv_sec -= b.tv_sec;
00988 a.tv_usec -= b.tv_usec;
00989 if (a.tv_usec < 0) {
00990 a.tv_sec-- ;
00991 a.tv_usec += ONE_MILLION;
00992 }
00993 return a;
00994 }
00995 #undef ONE_MILLION
00996
00997
00998
00999 #ifndef linux
01000
01001 AST_MUTEX_DEFINE_STATIC(randomlock);
01002
01003 long int ast_random(void)
01004 {
01005 long int res;
01006 ast_mutex_lock(&randomlock);
01007 res = random();
01008 ast_mutex_unlock(&randomlock);
01009 return res;
01010 }
01011 #endif
01012
01013 char *ast_process_quotes_and_slashes(char *start, char find, char replace_with)
01014 {
01015 char *dataPut = start;
01016 int inEscape = 0;
01017 int inQuotes = 0;
01018
01019 for (; *start; start++) {
01020 if (inEscape) {
01021 *dataPut++ = *start;
01022 inEscape = 0;
01023 } else {
01024 if (*start == '\\') {
01025 inEscape = 1;
01026 } else if (*start == '\'') {
01027 inQuotes = 1 - inQuotes;
01028 } else {
01029
01030 *dataPut++ = inQuotes ? *start : ((*start == find) ? replace_with : *start);
01031 }
01032 }
01033 }
01034 if (start != dataPut)
01035 *dataPut = 0;
01036 return dataPut;
01037 }
01038
01039 void ast_join(char *s, size_t len, char * const w[])
01040 {
01041 int x, ofs = 0;
01042 const char *src;
01043
01044
01045 if (!s)
01046 return;
01047 for (x = 0; ofs < len && w[x]; x++) {
01048 if (x > 0)
01049 s[ofs++] = ' ';
01050 for (src = w[x]; *src && ofs < len; src++)
01051 s[ofs++] = *src;
01052 }
01053 if (ofs == len)
01054 ofs--;
01055 s[ofs] = '\0';
01056 }
01057
01058 const char __ast_string_field_empty[] = "";
01059
01060 static int add_string_pool(struct ast_string_field_mgr *mgr, size_t size)
01061 {
01062 struct ast_string_field_pool *pool;
01063
01064 if (!(pool = ast_calloc(1, sizeof(*pool) + size)))
01065 return -1;
01066
01067 pool->prev = mgr->pool;
01068 mgr->pool = pool;
01069 mgr->size = size;
01070 mgr->space = size;
01071 mgr->used = 0;
01072
01073 return 0;
01074 }
01075
01076 int __ast_string_field_init(struct ast_string_field_mgr *mgr, size_t size,
01077 ast_string_field *fields, int num_fields)
01078 {
01079 int index;
01080
01081 if (add_string_pool(mgr, size))
01082 return -1;
01083
01084 for (index = 0; index < num_fields; index++)
01085 fields[index] = __ast_string_field_empty;
01086
01087 return 0;
01088 }
01089
01090 ast_string_field __ast_string_field_alloc_space(struct ast_string_field_mgr *mgr, size_t needed,
01091 ast_string_field *fields, int num_fields)
01092 {
01093 char *result = NULL;
01094
01095 if (__builtin_expect(needed > mgr->space, 0)) {
01096 size_t new_size = mgr->size * 2;
01097
01098 while (new_size < needed)
01099 new_size *= 2;
01100
01101 if (add_string_pool(mgr, new_size))
01102 return NULL;
01103 }
01104
01105 result = mgr->pool->base + mgr->used;
01106 mgr->used += needed;
01107 mgr->space -= needed;
01108 return result;
01109 }
01110
01111 void __ast_string_field_index_build_va(struct ast_string_field_mgr *mgr,
01112 ast_string_field *fields, int num_fields,
01113 int index, const char *format, va_list ap1, va_list ap2)
01114 {
01115 size_t needed;
01116
01117 needed = vsnprintf(mgr->pool->base + mgr->used, mgr->space, format, ap1) + 1;
01118
01119 va_end(ap1);
01120
01121 if (needed > mgr->space) {
01122 size_t new_size = mgr->size * 2;
01123
01124 while (new_size < needed)
01125 new_size *= 2;
01126
01127 if (add_string_pool(mgr, new_size))
01128 return;
01129
01130 vsprintf(mgr->pool->base + mgr->used, format, ap2);
01131 }
01132
01133 fields[index] = mgr->pool->base + mgr->used;
01134 mgr->used += needed;
01135 mgr->space -= needed;
01136 }
01137
01138 void __ast_string_field_index_build(struct ast_string_field_mgr *mgr,
01139 ast_string_field *fields, int num_fields,
01140 int index, const char *format, ...)
01141 {
01142 va_list ap1, ap2;
01143
01144 va_start(ap1, format);
01145 va_start(ap2, format);
01146
01147 __ast_string_field_index_build_va(mgr, fields, num_fields, index, format, ap1, ap2);
01148
01149 va_end(ap1);
01150 va_end(ap2);
01151 }
01152
01153 AST_MUTEX_DEFINE_STATIC(fetchadd_m);
01154
01155 int ast_atomic_fetchadd_int_slow(volatile int *p, int v)
01156 {
01157 int ret;
01158 ast_mutex_lock(&fetchadd_m);
01159 ret = *p;
01160 *p += v;
01161 ast_mutex_unlock(&fetchadd_m);
01162 return ret;
01163 }
01164
01165
01166
01167
01168 int ast_get_time_t(const char *src, time_t *dst, time_t _default, int *consumed)
01169 {
01170 long t;
01171 int scanned;
01172
01173 if (dst == NULL)
01174 return -1;
01175
01176 *dst = _default;
01177
01178 if (ast_strlen_zero(src))
01179 return -1;
01180
01181
01182 if (sscanf(src, "%ld%n", &t, &scanned) == 1) {
01183 *dst = t;
01184 if (consumed)
01185 *consumed = scanned;
01186 return 0;
01187 } else
01188 return -1;
01189 }
01190
01191 int ast_dynamic_str_thread_build_va(struct ast_dynamic_str **buf, size_t max_len,
01192 struct ast_threadstorage *ts, int append, const char *fmt, va_list ap)
01193 {
01194 int res;
01195 int offset = (append && (*buf)->len) ? strlen((*buf)->str) : 0;
01196 #if defined(DEBUG_THREADLOCALS)
01197 struct ast_dynamic_str *old_buf = *buf;
01198 #endif
01199
01200 res = vsnprintf((*buf)->str + offset, (*buf)->len - offset, fmt, ap);
01201
01202
01203
01204
01205 if ((res + offset + 1) > (*buf)->len && (max_len ? ((*buf)->len < max_len) : 1)) {
01206
01207
01208
01209
01210 if (max_len)
01211 (*buf)->len = ((res + offset + 1) < max_len) ? (res + offset + 1) : max_len;
01212 else
01213 (*buf)->len = res + offset + 1;
01214
01215 if (!(*buf = ast_realloc(*buf, (*buf)->len + sizeof(*(*buf)))))
01216 return AST_DYNSTR_BUILD_FAILED;
01217
01218 if (append)
01219 (*buf)->str[offset] = '\0';
01220
01221 if (ts) {
01222 pthread_setspecific(ts->key, *buf);
01223 #if defined(DEBUG_THREADLOCALS)
01224 __ast_threadstorage_object_replace(old_buf, *buf, (*buf)->len + sizeof(*(*buf)));
01225 #endif
01226 }
01227
01228
01229
01230 return AST_DYNSTR_BUILD_RETRY;
01231 }
01232
01233 return res;
01234 }
01235
01236 void ast_enable_packet_fragmentation(int sock)
01237 {
01238 #if defined(HAVE_IP_MTU_DISCOVER)
01239 int val = IP_PMTUDISC_DONT;
01240
01241 if (setsockopt(sock, IPPROTO_IP, IP_MTU_DISCOVER, &val, sizeof(val)))
01242 ast_log(LOG_WARNING, "Unable to disable PMTU discovery. Large UDP packets may fail to be delivered when sent from this socket.\n");
01243 #endif
01244 }
01245
01246 int ast_utils_init(void)
01247 {
01248 base64_init();
01249 #ifdef DEBUG_THREADS
01250 ast_cli_register_multiple(utils_cli, sizeof(utils_cli) / sizeof(utils_cli[0]));
01251 #endif
01252 return 0;
01253 }
01254
01255