Sun Dec 18 20:55:55 2011

Asterisk developer's documentation


utils.c File Reference

Utility functions. More...

#include "asterisk.h"
#include <ctype.h>
#include <string.h>
#include <unistd.h>
#include <stdlib.h>
#include <errno.h>
#include <stdarg.h>
#include <stdio.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include "asterisk/lock.h"
#include "asterisk/io.h"
#include "asterisk/logger.h"
#include "asterisk/md5.h"
#include "asterisk/sha1.h"
#include "asterisk/options.h"
#include "asterisk/cli.h"
#include "asterisk/linkedlists.h"
#include "asterisk/strings.h"
#include "asterisk/time.h"
#include "asterisk/stringfields.h"
#include "asterisk/utils.h"
#include "asterisk/threadstorage.h"

Include dependency graph for utils.c:

Go to the source code of this file.

Data Structures

struct  thr_arg

Defines

#define AST_API_MODULE
#define AST_API_MODULE
#define AST_API_MODULE
#define AST_API_MODULE
#define AST_API_MODULE
#define AST_API_MODULE
#define ERANGE   34
#define ONE_MILLION   1000000

Functions

ast_string_field __ast_string_field_alloc_space (struct ast_string_field_mgr *mgr, size_t needed, ast_string_field *fields, int num_fields)
void __ast_string_field_index_build (struct ast_string_field_mgr *mgr, ast_string_field *fields, int num_fields, int index, const char *format,...)
void __ast_string_field_index_build_va (struct ast_string_field_mgr *mgr, ast_string_field *fields, int num_fields, int index, const char *format, va_list ap1, va_list ap2)
int __ast_string_field_init (struct ast_string_field_mgr *mgr, size_t size, ast_string_field *fields, int num_fields)
int _ast_asprintf (char **ret, const char *file, int lineno, const char *func, const char *fmt,...)
static int add_string_pool (struct ast_string_field_mgr *mgr, size_t size)
int ast_atomic_fetchadd_int_slow (volatile int *p, int v)
int ast_base64decode (unsigned char *dst, const char *src, int max)
 decode BASE64 encoded text
int ast_base64encode (char *dst, const unsigned char *src, int srclen, int max)
int ast_base64encode_full (char *dst, const unsigned char *src, int srclen, int max, int linebreaks)
 encode text to BASE64 coding
int ast_build_string (char **buffer, size_t *space, const char *fmt,...)
int ast_build_string_va (char **buffer, size_t *space, const char *fmt, va_list ap)
 Build a string in a buffer, designed to be called repeatedly.
int ast_carefulwrite (int fd, char *s, int len, int timeoutms)
 Try to write string, but wait no more than ms milliseconds before timing out.
int ast_dynamic_str_thread_build_va (struct ast_dynamic_str **buf, size_t max_len, struct ast_threadstorage *ts, int append, const char *fmt, va_list ap)
 Core functionality of ast_dynamic_str_thread_(set|append)_va.
void ast_enable_packet_fragmentation (int sock)
int ast_false (const char *s)
int ast_get_time_t (const char *src, time_t *dst, time_t _default, int *consumed)
 get values from config variables.
struct hostent * ast_gethostbyname (const char *host, struct ast_hostent *hp)
 Re-entrant (thread safe) version of gethostbyname that replaces the standard gethostbyname (which is not thread safe).
const char * ast_inet_ntoa (struct in_addr ia)
 ast_inet_ntoa: Recursive thread safe replacement of inet_ntoa
void ast_join (char *s, size_t len, char *const w[])
void ast_md5_hash (char *output, char *input)
 Produce 32 char MD5 hash of value.
 AST_MUTEX_DEFINE_STATIC (fetchadd_m)
 AST_MUTEX_DEFINE_STATIC (randomlock)
 glibc puts a lock inside random(3), so that the results are thread-safe. BSD libc (and others) do not.
 AST_MUTEX_DEFINE_STATIC (test_lock2)
 AST_MUTEX_DEFINE_STATIC (test_lock)
 AST_MUTEX_DEFINE_STATIC (__mutex)
char * ast_process_quotes_and_slashes (char *start, char find, char replace_with)
 Process a string to find and replace characters.
int ast_pthread_create_stack (pthread_t *thread, pthread_attr_t *attr, void *(*start_routine)(void *), void *data, size_t stacksize, const char *file, const char *caller, int line, const char *start_fn)
long int ast_random (void)
void ast_sha1_hash (char *output, char *input)
 Produce 40 char SHA1 hash of value.
char * ast_strip_quoted (char *s, const char *beg_quotes, const char *end_quotes)
 AST_THREADSTORAGE (inet_ntoa_buf, inet_ntoa_buf_init)
int ast_true (const char *s)
struct timeval ast_tvadd (struct timeval a, struct timeval b)
struct timeval ast_tvsub (struct timeval a, struct timeval b)
 Returns the difference of two timevals a - b.
char * ast_unescape_semicolon (char *s)
 Strip backslash for "escaped" semicolons.
void ast_uri_decode (char *s)
 ast_uri_decode: Decode SIP URI, URN, URL (overwrite the string)
char * ast_uri_encode (const char *string, char *outbuf, int buflen, int doreserved)
 ast_uri_encode: Turn text string to URI-encoded XX version
int ast_utils_init (void)
int ast_wait_for_input (int fd, int ms)
static void base64_init (void)
static void * dummy_start (void *data)
static int gethostbyname_r (const char *name, struct hostent *ret, char *buf, size_t buflen, struct hostent **result, int *h_errnop)
 Reentrant replacement for gethostbyname for BSD-based systems.
int test_for_thread_safety (void)
static void * test_thread_body (void *data)
 This is a regression test for recursive mutexes. test_for_thread_safety() will return 0 if recursive mutex locks are working properly, and non-zero if they are not working properly.
static struct timeval tvfix (struct timeval a)

Variables

const char __ast_string_field_empty [] = ""
static char b2a [256]
static char base64 [64]
static int lock_count = 0
static int test_errors = 0
static pthread_t test_thread


Detailed Description

Utility functions.

Note:
These are important for portability and security, so please use them in favour of other routines. Please consult the CODING GUIDELINES for more information.

Definition in file utils.c.


Define Documentation

#define AST_API_MODULE

Definition at line 64 of file utils.c.

#define AST_API_MODULE

Definition at line 64 of file utils.c.

#define AST_API_MODULE

Definition at line 64 of file utils.c.

#define AST_API_MODULE

Definition at line 64 of file utils.c.

#define AST_API_MODULE

Definition at line 64 of file utils.c.

#define AST_API_MODULE

Definition at line 64 of file utils.c.

#define ERANGE   34

duh? ERANGE value copied from web...

Definition at line 74 of file utils.c.

Referenced by gethostbyname_r(), and reload_queue_members().

#define ONE_MILLION   1000000

Definition at line 1084 of file utils.c.

Referenced by ast_tvadd(), ast_tvsub(), and tvfix().


Function Documentation

ast_string_field __ast_string_field_alloc_space ( struct ast_string_field_mgr mgr,
size_t  needed,
ast_string_field fields,
int  num_fields 
)

Definition at line 1226 of file utils.c.

References add_string_pool(), ast_string_field_pool::base, ast_string_field_mgr::pool, ast_string_field_mgr::size, ast_string_field_mgr::space, and ast_string_field_mgr::used.

01228 {
01229    char *result = NULL;
01230 
01231    if (__builtin_expect(needed > mgr->space, 0)) {
01232       size_t new_size = mgr->size * 2;
01233 
01234       while (new_size < needed)
01235          new_size *= 2;
01236 
01237       if (add_string_pool(mgr, new_size))
01238          return NULL;
01239    }
01240 
01241    result = mgr->pool->base + mgr->used;
01242    mgr->used += needed;
01243    mgr->space -= needed;
01244    return result;
01245 }

void __ast_string_field_index_build ( struct ast_string_field_mgr mgr,
ast_string_field fields,
int  num_fields,
int  index,
const char *  format,
  ... 
)

Definition at line 1274 of file utils.c.

References __ast_string_field_index_build_va().

01277 {
01278    va_list ap1, ap2;
01279 
01280    va_start(ap1, format);
01281    va_start(ap2, format);     /* va_copy does not exist on FreeBSD */
01282 
01283    __ast_string_field_index_build_va(mgr, fields, num_fields, index, format, ap1, ap2);
01284 
01285    va_end(ap1);
01286    va_end(ap2);
01287 }

void __ast_string_field_index_build_va ( struct ast_string_field_mgr mgr,
ast_string_field fields,
int  num_fields,
int  index,
const char *  format,
va_list  ap1,
va_list  ap2 
)

Definition at line 1247 of file utils.c.

References add_string_pool(), ast_string_field_pool::base, ast_string_field_mgr::pool, ast_string_field_mgr::size, ast_string_field_mgr::space, and ast_string_field_mgr::used.

Referenced by __ast_string_field_index_build().

01250 {
01251    size_t needed;
01252 
01253    needed = vsnprintf(mgr->pool->base + mgr->used, mgr->space, format, ap1) + 1;
01254 
01255    va_end(ap1);
01256 
01257    if (needed > mgr->space) {
01258       size_t new_size = mgr->size * 2;
01259 
01260       while (new_size < needed)
01261          new_size *= 2;
01262 
01263       if (add_string_pool(mgr, new_size))
01264          return;
01265 
01266       vsprintf(mgr->pool->base + mgr->used, format, ap2);
01267    }
01268 
01269    fields[index] = mgr->pool->base + mgr->used;
01270    mgr->used += needed;
01271    mgr->space -= needed;
01272 }

int __ast_string_field_init ( struct ast_string_field_mgr mgr,
size_t  size,
ast_string_field fields,
int  num_fields 
)

Definition at line 1212 of file utils.c.

References __ast_string_field_empty, and add_string_pool().

01214 {
01215    int index;
01216 
01217    if (add_string_pool(mgr, size))
01218       return -1;
01219 
01220    for (index = 0; index < num_fields; index++)
01221       fields[index] = __ast_string_field_empty;
01222 
01223    return 0;
01224 }

int _ast_asprintf ( char **  ret,
const char *  file,
int  lineno,
const char *  func,
const char *  fmt,
  ... 
)

Definition at line 1394 of file utils.c.

References MALLOC_FAILURE_MSG, and vasprintf.

01395 {
01396    int res;
01397    va_list ap;
01398 
01399    va_start(ap, fmt);
01400    if ((res = vasprintf(ret, fmt, ap)) == -1) {
01401       MALLOC_FAILURE_MSG;
01402    }
01403    va_end(ap);
01404 
01405    return res;
01406 }

static int add_string_pool ( struct ast_string_field_mgr mgr,
size_t  size 
) [static]

Definition at line 1196 of file utils.c.

References ast_calloc, ast_string_field_mgr::pool, ast_string_field_pool::prev, ast_string_field_mgr::size, ast_string_field_mgr::space, and ast_string_field_mgr::used.

Referenced by __ast_string_field_alloc_space(), __ast_string_field_index_build_va(), and __ast_string_field_init().

01197 {
01198    struct ast_string_field_pool *pool;
01199 
01200    if (!(pool = ast_calloc(1, sizeof(*pool) + size)))
01201       return -1;
01202    
01203    pool->prev = mgr->pool;
01204    mgr->pool = pool;
01205    mgr->size = size;
01206    mgr->space = size;
01207    mgr->used = 0;
01208 
01209    return 0;
01210 }

int ast_atomic_fetchadd_int_slow ( volatile int *  p,
int  v 
)

Definition at line 1291 of file utils.c.

References ast_mutex_lock(), and ast_mutex_unlock().

01292 {
01293         int ret;
01294         ast_mutex_lock(&fetchadd_m);
01295         ret = *p;
01296         *p += v;
01297         ast_mutex_unlock(&fetchadd_m);
01298         return ret;
01299 }

int ast_base64decode ( unsigned char *  dst,
const char *  src,
int  max 
)

decode BASE64 encoded text

Definition at line 328 of file utils.c.

Referenced by __ast_check_signature(), base64_decode(), and osp_validate_token().

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       /* Shift in 6 bits of input */
00336       byte <<= 6;
00337       byte |= (b2a[(int)(*src)]) & 0x3f;
00338       bits += 6;
00339       src++;
00340       incnt++;
00341       /* If we have at least 8 bits left over, take that character 
00342          off the top */
00343       if (bits >= 8)  {
00344          bits -= 8;
00345          *dst = (byte >> bits) & 0xff;
00346          dst++;
00347          cnt++;
00348       }
00349    }
00350    /* Dont worry about left over bits, they're extra anyway */
00351    return cnt;
00352 }

int ast_base64encode ( char *  dst,
const unsigned char *  src,
int  srclen,
int  max 
)

Definition at line 406 of file utils.c.

References ast_base64encode_full().

Referenced by __ast_sign(), aji_act_hook(), base64_encode(), build_secret(), and osp_check_destination().

00407 {
00408    return ast_base64encode_full(dst, src, srclen, max, 0);
00409 }

int ast_base64encode_full ( char *  dst,
const unsigned char *  src,
int  srclen,
int  max,
int  linebreaks 
)

encode text to BASE64 coding

Definition at line 355 of file utils.c.

Referenced by ast_base64encode().

00356 {
00357    int cnt = 0;
00358    int col = 0;
00359    unsigned int byte = 0;
00360    int bits = 0;
00361    int cntin = 0;
00362    /* Reserve space for null byte at end of string */
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       /* Add one last character for the remaining bits, 
00387          padding the rest with 0 */
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 }

int ast_build_string ( char **  buffer,
size_t *  space,
const char *  fmt,
  ... 
)

int ast_build_string_va ( char **  buffer,
size_t *  space,
const char *  fmt,
va_list  ap 
)

Build a string in a buffer, designed to be called repeatedly.

This is a wrapper for snprintf, that properly handles the buffer pointer and buffer space available.

Returns:
0 on success, non-zero on failure.
Parameters:
buffer current position in buffer to place string into (will be updated on return)
space remaining space in buffer (will be updated on return)
fmt printf-style format string
ap varargs list of arguments for format

Definition at line 1019 of file utils.c.

Referenced by ast_build_string().

01020 {
01021    int result;
01022 
01023    if (!buffer || !*buffer || !space || !*space)
01024       return -1;
01025 
01026    result = vsnprintf(*buffer, *space, fmt, ap);
01027 
01028    if (result < 0)
01029       return -1;
01030    else if (result > *space)
01031       result = *space;
01032 
01033    *buffer += result;
01034    *space -= result;
01035    return 0;
01036 }

int ast_carefulwrite ( int  fd,
char *  s,
int  len,
int  timeoutms 
)

Try to write string, but wait no more than ms milliseconds before timing out.

ast_carefulwrite

Note:
If you are calling ast_carefulwrite, it is assumed that you are calling it on a file descriptor that _DOES_ have NONBLOCK set. This way, there is only one system call made to do a write, unless we actually have a need to wait. This way, we get better performance.

Definition at line 957 of file utils.c.

References errno, pollfd::events, pollfd::fd, poll(), and POLLOUT.

Referenced by agi_debug_cli(), ast_cli(), astman_append(), and process_events().

00958 {
00959    /* Try to write string, but wait no more than ms milliseconds
00960       before timing out */
00961    int res = 0;
00962    struct pollfd fds[1];
00963    while (len) {
00964       res = write(fd, s, len);
00965       if ((res < 0) && (errno != EAGAIN)) {
00966          return -1;
00967       }
00968       if (res < 0)
00969          res = 0;
00970       len -= res;
00971       s += res;
00972       res = 0;
00973       if (len) {
00974          fds[0].fd = fd;
00975          fds[0].events = POLLOUT;
00976          /* Wait until writable again */
00977          res = poll(fds, 1, timeoutms);
00978          if (res < 1)
00979             return -1;
00980       }
00981    }
00982    return res;
00983 }

int ast_dynamic_str_thread_build_va ( struct ast_dynamic_str **  buf,
size_t  max_len,
struct ast_threadstorage ts,
int  append,
const char *  fmt,
va_list  ap 
)

Core functionality of ast_dynamic_str_thread_(set|append)_va.

The arguments to this function are the same as those described for ast_dynamic_str_thread_set_va except for an addition argument, append. If append is non-zero, this will append to the current string instead of writing over it.

Definition at line 1327 of file utils.c.

References ast_realloc, ast_threadstorage::key, and offset.

01329 {
01330    int res;
01331    int offset = (append && (*buf)->len) ? strlen((*buf)->str) : 0;
01332 #if defined(DEBUG_THREADLOCALS)
01333    struct ast_dynamic_str *old_buf = *buf;
01334 #endif /* defined(DEBUG_THREADLOCALS) */
01335 
01336    res = vsnprintf((*buf)->str + offset, (*buf)->len - offset, fmt, ap);
01337 
01338    /* Check to see if there was not enough space in the string buffer to prepare
01339     * the string.  Also, if a maximum length is present, make sure the current
01340     * length is less than the maximum before increasing the size. */
01341    if ((res + offset + 1) > (*buf)->len && (max_len ? ((*buf)->len < max_len) : 1)) {
01342       /* Set the new size of the string buffer to be the size needed
01343        * to hold the resulting string (res) plus one byte for the
01344        * terminating '\0'.  If this size is greater than the max, set
01345        * the new length to be the maximum allowed. */
01346       if (max_len)
01347          (*buf)->len = ((res + offset + 1) < max_len) ? (res + offset + 1) : max_len;
01348       else
01349          (*buf)->len = res + offset + 1;
01350 
01351       if (!(*buf = ast_realloc(*buf, (*buf)->len + sizeof(*(*buf)))))
01352          return AST_DYNSTR_BUILD_FAILED;
01353 
01354       if (append)
01355          (*buf)->str[offset] = '\0';
01356 
01357       if (ts) {
01358          pthread_setspecific(ts->key, *buf);
01359 #if defined(DEBUG_THREADLOCALS)
01360          __ast_threadstorage_object_replace(old_buf, *buf, (*buf)->len + sizeof(*(*buf)));
01361 #endif /* defined(DEBUG_THREADLOCALS) */
01362       }
01363 
01364       /* va_end() and va_start() must be done before calling
01365        * vsnprintf() again. */
01366       return AST_DYNSTR_BUILD_RETRY;
01367    }
01368 
01369    return res;
01370 }

void ast_enable_packet_fragmentation ( int  sock  ) 

Definition at line 1372 of file utils.c.

References ast_log(), and LOG_WARNING.

Referenced by ast_netsock_bindaddr(), and reload_config().

01373 {
01374 #if defined(HAVE_IP_MTU_DISCOVER)
01375    int val = IP_PMTUDISC_DONT;
01376    
01377    if (setsockopt(sock, IPPROTO_IP, IP_MTU_DISCOVER, &val, sizeof(val)))
01378       ast_log(LOG_WARNING, "Unable to disable PMTU discovery. Large UDP packets may fail to be delivered when sent from this socket.\n");
01379 #endif /* HAVE_IP_MTU_DISCOVER */
01380 }

int ast_false ( const char *  val  ) 

Make sure something is false

Determine if a string containing a boolean value is "false". This function checks to see whether a string passed to it is an indication of an "false" value. It checks to see if the string is "no", "false", "n", "f", "off" or "0".

Returns 0 if val is a NULL pointer, -1 if "false", and 0 otherwise.

Definition at line 1067 of file utils.c.

References ast_strlen_zero().

Referenced by aji_create_client(), aji_load_config(), ast_rtp_reload(), ast_udptl_reload(), handle_common_options(), init_acf_query(), load_config(), load_odbc_config(), reload(), run_agi(), set_insecure_flags(), sla_build_trunk(), and strings_to_mask().

01068 {
01069    if (ast_strlen_zero(s))
01070       return 0;
01071 
01072    /* Determine if this is a false value */
01073    if (!strcasecmp(s, "no") ||
01074        !strcasecmp(s, "false") ||
01075        !strcasecmp(s, "n") ||
01076        !strcasecmp(s, "f") ||
01077        !strcasecmp(s, "0") ||
01078        !strcasecmp(s, "off"))
01079       return -1;
01080 
01081    return 0;
01082 }

int ast_get_time_t ( const char *  src,
time_t *  dst,
time_t  _default,
int *  consumed 
)

get values from config variables.

Definition at line 1304 of file utils.c.

References ast_strlen_zero(), and t.

Referenced by acf_strftime(), build_peer(), cache_lookup_internal(), handle_saydatetime(), load_password(), play_message_datetime(), realtime_peer(), and sayunixtime_exec().

01305 {
01306    long t;
01307    int scanned;
01308 
01309    if (dst == NULL)
01310       return -1;
01311 
01312    *dst = _default;
01313 
01314    if (ast_strlen_zero(src))
01315       return -1;
01316 
01317    /* only integer at the moment, but one day we could accept more formats */
01318    if (sscanf(src, "%ld%n", &t, &scanned) == 1) {
01319       *dst = t;
01320       if (consumed)
01321          *consumed = scanned;
01322       return 0;
01323    } else
01324       return -1;
01325 }

struct hostent* ast_gethostbyname ( const char *  host,
struct ast_hostent hp 
) [read]

Re-entrant (thread safe) version of gethostbyname that replaces the standard gethostbyname (which is not thread safe).

Definition at line 184 of file utils.c.

References ast_hostent::buf, gethostbyname_r(), ast_hostent::hp, and s.

Referenced by __ast_http_load(), ast_dnsmgr_lookup(), ast_find_ourip(), ast_get_ip_or_srv(), ast_sip_ouraddrfor(), build_peer(), check_via(), create_addr(), dnsmgr_refresh(), festival_exec(), gtalk_load_config(), gtalk_update_stun(), iax_template_parse(), launch_netscript(), load_module(), parse_register_contact(), process_sdp(), realtime_peer(), realtime_user(), reload_config(), rpt_exec(), rtcp_do_debug_ip(), rtcp_do_debug_ip_deprecated(), rtp_do_debug_ip(), set_address_from_contact(), set_config(), set_destination(), sip_devicestate(), sip_do_debug_ip(), and udptl_do_debug_ip().

00185 {
00186    int res;
00187    int herrno;
00188    int dots=0;
00189    const char *s;
00190    struct hostent *result = NULL;
00191    /* Although it is perfectly legitimate to lookup a pure integer, for
00192       the sake of the sanity of people who like to name their peers as
00193       integers, we break with tradition and refuse to look up a
00194       pure integer */
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       /* Forge a reply for IP's to avoid octal IP's being interpreted as octal */
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 }

const char* ast_inet_ntoa ( struct in_addr  ia  ) 

ast_inet_ntoa: Recursive thread safe replacement of inet_ntoa

thread-safe replacement for inet_ntoa().

Definition at line 494 of file utils.c.

Referenced by __attempt_transmit(), __find_callno(), __iax2_show_peers(), __sip_show_channels(), __sip_xmit(), _sip_show_peer(), _sip_show_peers(), accept_thread(), add_sdp(), add_t38_sdp(), ast_apply_ha(), ast_netsock_bindaddr(), ast_rtcp_read(), ast_rtcp_write_rr(), ast_rtcp_write_sr(), ast_rtp_raw_write(), ast_rtp_read(), ast_rtp_sendcng(), ast_rtp_senddigit_begin(), ast_rtp_senddigit_continuation(), ast_rtp_senddigit_end(), ast_sip_ouraddrfor(), ast_udptl_bridge(), ast_udptl_read(), ast_udptl_write(), authenticate(), bridge_native_loop(), bridge_p2p_rtp_write(), build_callid_pvt(), build_callid_registry(), build_contact(), build_reply_digest(), build_rpid(), build_via(), check_access(), check_user_full(), check_via(), copy_via_headers(), create_addr_from_peer(), dnsmgr_refresh(), do_message(), dump_addr(), dump_ipaddr(), dundi_rexmit(), dundi_show_peer(), dundi_show_peers(), dundi_show_trans(), dundi_showframe(), dundi_xmit(), external_rtp_create(), find_command(), find_peer(), find_subchannel_and_lock(), find_tpeer(), function_iaxpeer(), function_sipchaninfo_read(), function_sippeer(), generic_http_callback(), get_input(), gtalk_create_candidates(), gtalk_update_stun(), handle_command_response(), handle_error(), handle_open_receive_channel_ack_message(), handle_request(), handle_request_bye(), handle_request_register(), handle_request_subscribe(), handle_response(), handle_response_refer(), handle_show_http(), handle_showmanconn(), http_server_start(), httpstatus_callback(), iax2_ack_registry(), iax2_prov_app(), iax2_show_channels(), iax2_show_peer(), iax2_show_registry(), iax2_trunk_queue(), iax_server(), iax_showframe(), initreqprep(), load_module(), mgcp_show_endpoints(), mgcpsock_read(), oh323_addrcmp_str(), oh323_call(), oh323_set_rtp_peer(), parse_register_contact(), process_message(), process_rfc3389(), process_sdp(), raw_hangup(), realtime_peer(), realtime_update_peer(), realtime_user(), reg_source_db(), register_verify(), registry_rerequest(), reload_config(), resend_response(), retrans_pkt(), rpt_exec(), rtcp_do_debug_ip(), rtcp_do_debug_ip_deprecated(), rtp_do_debug_ip(), send_dtmf(), send_packet(), send_request(), send_response(), send_trunk(), session_do(), set_config(), set_destination(), setup_incoming_call(), sip_do_debug_ip(), sip_do_debug_peer(), sip_handle_t38_reinvite(), sip_poke_peer(), sip_set_rtp_peer(), sip_set_udptl_peer(), sip_show_channel(), sip_show_settings(), sipsock_read(), skinny_session(), skinny_show_devices(), socket_process(), timing_read(), transmit_notify_with_mwi(), udptl_do_debug_ip(), and update_registry().

00495 {
00496    char *buf;
00497 
00498    if (!(buf = ast_threadstorage_get(&inet_ntoa_buf, INET_ADDRSTRLEN)))
00499       return "";
00500 
00501    return inet_ntop(AF_INET, &ia, buf, INET_ADDRSTRLEN);
00502 }

void ast_join ( char *  s,
size_t  len,
char *const   w[] 
)

Definition at line 1175 of file utils.c.

Referenced by __ast_cli_generator(), __ast_cli_register(), ast_builtins_init(), console_sendtext(), console_sendtext_deprecated(), find_best(), handle_agidumphtml(), handle_help(), handle_showagi(), help1(), and help_workhorse().

01176 {
01177    int x, ofs = 0;
01178    const char *src;
01179 
01180    /* Join words into a string */
01181    if (!s)
01182       return;
01183    for (x = 0; ofs < len && w[x]; x++) {
01184       if (x > 0)
01185          s[ofs++] = ' ';
01186       for (src = w[x]; *src && ofs < len; src++)
01187          s[ofs++] = *src;
01188    }
01189    if (ofs == len)
01190       ofs--;
01191    s[ofs] = '\0';
01192 }

void ast_md5_hash ( char *  output,
char *  input 
)

Produce 32 char MD5 hash of value.

Definition at line 294 of file utils.c.

References MD5Final(), MD5Init(), and MD5Update().

Referenced by auth_exec(), build_reply_digest(), check_auth(), checkmd5(), and md5().

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 }

AST_MUTEX_DEFINE_STATIC ( fetchadd_m   ) 

AST_MUTEX_DEFINE_STATIC ( randomlock   ) 

glibc puts a lock inside random(3), so that the results are thread-safe. BSD libc (and others) do not.

AST_MUTEX_DEFINE_STATIC ( test_lock2   ) 

AST_MUTEX_DEFINE_STATIC ( test_lock   ) 

AST_MUTEX_DEFINE_STATIC ( __mutex   ) 

char* ast_process_quotes_and_slashes ( char *  start,
char  find,
char  replace_with 
)

Process a string to find and replace characters.

Parameters:
start The string to analyze
find The character to find
replace_with The character that will replace the one we are looking for

Definition at line 1149 of file utils.c.

Referenced by handle_context_add_extension(), handle_context_add_extension_deprecated(), and pbx_load_config().

01150 {
01151    char *dataPut = start;
01152    int inEscape = 0;
01153    int inQuotes = 0;
01154 
01155    for (; *start; start++) {
01156       if (inEscape) {
01157          *dataPut++ = *start;       /* Always goes verbatim */
01158          inEscape = 0;
01159       } else {
01160          if (*start == '\\') {
01161             inEscape = 1;      /* Do not copy \ into the data */
01162          } else if (*start == '\'') {
01163             inQuotes = 1 - inQuotes;   /* Do not copy ' into the data */
01164          } else {
01165             /* Replace , with |, unless in quotes */
01166             *dataPut++ = inQuotes ? *start : ((*start == find) ? replace_with : *start);
01167          }
01168       }
01169    }
01170    if (start != dataPut)
01171       *dataPut = 0;
01172    return dataPut;
01173 }

int ast_pthread_create_stack ( pthread_t *  thread,
pthread_attr_t *  attr,
void *(*)(void *)  start_routine,
void *  data,
size_t  stacksize,
const char *  file,
const char *  caller,
int  line,
const char *  start_fn 
)

Definition at line 903 of file utils.c.

References asprintf, ast_log(), ast_malloc, AST_STACKSIZE, thr_arg::data, dummy_start(), errno, LOG_WARNING, thr_arg::name, pthread_create, and thr_arg::start_routine.

00906 {
00907 #if !defined(LOW_MEMORY)
00908    struct thr_arg *a;
00909 #endif
00910 
00911    if (!attr) {
00912       attr = alloca(sizeof(*attr));
00913       pthread_attr_init(attr);
00914    }
00915 
00916 #ifdef __linux__
00917    /* On Linux, pthread_attr_init() defaults to PTHREAD_EXPLICIT_SCHED,
00918       which is kind of useless. Change this here to
00919       PTHREAD_INHERIT_SCHED; that way the -p option to set realtime
00920       priority will propagate down to new threads by default.
00921       This does mean that callers cannot set a different priority using
00922       PTHREAD_EXPLICIT_SCHED in the attr argument; instead they must set
00923       the priority afterwards with pthread_setschedparam(). */
00924    if ((errno = pthread_attr_setinheritsched(attr, PTHREAD_INHERIT_SCHED)))
00925       ast_log(LOG_WARNING, "pthread_attr_setinheritsched: %s\n", strerror(errno));
00926 #endif
00927 
00928    if (!stacksize)
00929       stacksize = AST_STACKSIZE;
00930 
00931    if ((errno = pthread_attr_setstacksize(attr, stacksize ? stacksize : AST_STACKSIZE)))
00932       ast_log(LOG_WARNING, "pthread_attr_setstacksize: %s\n", strerror(errno));
00933 
00934 #if !defined(LOW_MEMORY)
00935    if ((a = ast_malloc(sizeof(*a)))) {
00936       a->start_routine = start_routine;
00937       a->data = data;
00938       start_routine = dummy_start;
00939       asprintf(&a->name, "%-20s started at [%5d] %s %s()",
00940           start_fn, line, file, caller);
00941       data = a;
00942    }
00943 #endif /* !LOW_MEMORY */
00944 
00945    return pthread_create(thread, attr, start_routine, data); /* We're in ast_pthread_create, so it's okay */
00946 }

long int ast_random ( void   ) 

void ast_sha1_hash ( char *  output,
char *  input 
)

Produce 40 char SHA1 hash of value.

Definition at line 310 of file utils.c.

References SHA1Input(), SHA1Reset(), and SHA1Result().

Referenced by aji_act_hook(), jabber_make_auth(), and sha1().

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 }

char* ast_strip_quoted ( char *  s,
const char *  beg_quotes,
const char *  end_quotes 
)

Definition at line 985 of file utils.c.

Referenced by ast_register_file_version(), iftime(), parse_cookies(), and parse_dial_string().

00986 {
00987    char *e;
00988    char *q;
00989 
00990    s = ast_strip(s);
00991    if ((q = strchr(beg_quotes, *s)) && *q != '\0') {
00992       e = s + strlen(s) - 1;
00993       if (*e == *(end_quotes + (q - beg_quotes))) {
00994          s++;
00995          *e = '\0';
00996       }
00997    }
00998 
00999    return s;
01000 }

AST_THREADSTORAGE ( inet_ntoa_buf  ,
inet_ntoa_buf_init   
)

int ast_true ( const char *  val  ) 

Make sure something is true

Determine if a string containing a boolean value is "true". This function checks to see whether a string passed to it is an indication of an "true" value. It checks to see if the string is "yes", "true", "y", "t", "on" or "1".

Returns 0 if val is a NULL pointer, -1 if "true", and 0 otherwise.

Definition at line 1050 of file utils.c.

References ast_strlen_zero().

Referenced by __ast_http_load(), __login_exec(), _parse(), action_agent_callback_login(), action_agent_logoff(), action_bridge(), action_originate(), action_setcdruserfield(), action_updateconfig(), aji_create_client(), aji_load_config(), apply_option(), apply_outgoing(), ast_jb_read_conf(), ast_readconfig(), authenticate(), build_device(), build_gateway(), build_peer(), build_user(), connect_link(), do_directory(), do_reload(), festival_exec(), get_encrypt_methods(), gtalk_load_config(), handle_common_options(), handle_save_dialplan(), init_logger_chain(), init_manager(), load_config(), load_module(), load_modules(), load_moh_classes(), load_odbc_config(), load_rpt_vars(), loadconfigurationfile(), manager_add_queue_member(), manager_pause_queue_member(), odbc_load_module(), osp_load(), parse_config(), pbx_load_config(), pbx_load_users(), process_zap(), queue_set_param(), read_agent_config(), reload(), reload_config(), reload_queues(), set_config(), set_insecure_flags(), sla_load_config(), smdi_load(), start_monitor_action(), strings_to_mask(), and update_common_options().

01051 {
01052    if (ast_strlen_zero(s))
01053       return 0;
01054 
01055    /* Determine if this is a true value */
01056    if (!strcasecmp(s, "yes") ||
01057        !strcasecmp(s, "true") ||
01058        !strcasecmp(s, "y") ||
01059        !strcasecmp(s, "t") ||
01060        !strcasecmp(s, "1") ||
01061        !strcasecmp(s, "on"))
01062       return -1;
01063 
01064    return 0;
01065 }

struct timeval ast_tvadd ( struct timeval  a,
struct timeval  b 
) [read]

Definition at line 1104 of file utils.c.

References ONE_MILLION, and tvfix().

Referenced by __get_from_jb(), agent_hangup(), agent_read(), ast_audiohook_trigger_wait(), ast_channel_bridge(), ast_rtp_sendcng(), ast_rtp_senddigit_begin(), ast_rtp_senddigit_end(), ast_sched_runq(), ast_smoother_read(), ast_translate(), calc_timestamp(), do_cdr(), iax2_process_thread(), jb_get_and_deliver(), monmp3thread(), mp3_exec(), mwi_monitor_handler(), NBScat_exec(), sched_settime(), sched_thread(), schedule_delivery(), sla_process_timers(), and smdi_message_wait().

01105 {
01106    /* consistency checks to guarantee usec in 0..999999 */
01107    a = tvfix(a);
01108    b = tvfix(b);
01109    a.tv_sec += b.tv_sec;
01110    a.tv_usec += b.tv_usec;
01111    if (a.tv_usec >= ONE_MILLION) {
01112       a.tv_sec++;
01113       a.tv_usec -= ONE_MILLION;
01114    }
01115    return a;
01116 }

struct timeval ast_tvsub ( struct timeval  a,
struct timeval  b 
) [read]

Returns the difference of two timevals a - b.

Definition at line 1118 of file utils.c.

References ONE_MILLION, and tvfix().

Referenced by ast_channel_bridge(), ast_sched_dump(), ast_translate(), calc_rxstamp(), and calc_timestamp().

01119 {
01120    /* consistency checks to guarantee usec in 0..999999 */
01121    a = tvfix(a);
01122    b = tvfix(b);
01123    a.tv_sec -= b.tv_sec;
01124    a.tv_usec -= b.tv_usec;
01125    if (a.tv_usec < 0) {
01126       a.tv_sec-- ;
01127       a.tv_usec += ONE_MILLION;
01128    }
01129    return a;
01130 }

char* ast_unescape_semicolon ( char *  s  ) 

Strip backslash for "escaped" semicolons.

s The string to be stripped (will be modified).

Returns:
The stripped string.

Definition at line 1002 of file utils.c.

Referenced by sip_notify().

01003 {
01004    char *e;
01005    char *work = s;
01006 
01007    while ((e = strchr(work, ';'))) {
01008       if ((e > work) && (*(e-1) == '\\')) {
01009          memmove(e - 1, e, strlen(e) + 1);
01010          work = e;
01011       } else {
01012          work = e + 1;
01013       }
01014    }
01015 
01016    return s;
01017 }

void ast_uri_decode ( char *  s  ) 

ast_uri_decode: Decode SIP URI, URN, URL (overwrite the string)

Decode URI, URN, URL (overwrite string).

Definition at line 477 of file utils.c.

Referenced by check_user_full(), get_also_info(), get_destination(), get_refer_info(), handle_request_invite(), handle_uri(), register_verify(), sip_new(), and uridecode().

00478 {
00479    char *o;
00480    unsigned int tmp;
00481 
00482    for (o = s; *s; s++, o++) {
00483       if (*s == '%' && strlen(s) > 2 && sscanf(s + 1, "%2x", &tmp) == 1) {
00484          /* have '%', two chars and correct parsing */
00485          *o = tmp;
00486          s += 2;  /* Will be incremented once more when we break out */
00487       } else /* all other cases, just copy */
00488          *o = *s;
00489    }
00490    *o = '\0';
00491 }

char* ast_uri_encode ( const char *  string,
char *  outbuf,
int  buflen,
int  doreserved 
)

ast_uri_encode: Turn text string to URI-encoded XX version

Turn text string to URI-encoded XX version At this point, we're converting from ISO-8859-x (8-bit), not UTF8 as in the SIP protocol spec If doreserved == 1 we will convert reserved characters also. RFC 2396, section 2.4 outbuf needs to have more memory allocated than the instring to have room for the expansion. Every char that is converted is replaced by three ASCII characters.

Note:
At this point, we're converting from ISO-8859-x (8-bit), not UTF8 as in the SIP protocol spec If doreserved == 1 we will convert reserved characters also. RFC 2396, section 2.4 outbuf needs to have more memory allocated than the instring to have room for the expansion. Every char that is converted is replaced by three ASCII characters.
Note: The doreserved option is needed for replaces header in SIP transfers.

Definition at line 447 of file utils.c.

Referenced by initreqprep(), and uriencode().

00448 {
00449    char *reserved = ";/?:@&=+$,# "; /* Reserved chars */
00450 
00451    const char *ptr  = string; /* Start with the string */
00452    char *out = outbuf;
00453 
00454    /* If there's no characters to convert, just go through and copy the string */
00455    while (*ptr && out - outbuf < buflen - 1) {
00456       if ((*ptr < 32) || (doreserved && strchr(reserved, *ptr))) {
00457          if (out - outbuf >= buflen - 3) {
00458             break;
00459          }
00460 
00461          out += sprintf(out, "%%%02x", (unsigned char) *ptr);
00462       } else {
00463          *out = *ptr;   /* copy the character */
00464          out++;
00465       }
00466       ptr++;
00467    }
00468 
00469    if (buflen) {
00470       *out = '\0';
00471    }
00472 
00473    return outbuf;
00474 }

int ast_utils_init ( void   ) 

Definition at line 1382 of file utils.c.

References ast_cli_register_multiple(), and base64_init().

Referenced by main().

01383 {
01384    base64_init();
01385 #ifdef DEBUG_THREADS
01386 #if !defined(LOW_MEMORY)
01387    ast_cli_register_multiple(utils_cli, sizeof(utils_cli) / sizeof(utils_cli[0]));
01388 #endif
01389 #endif
01390    return 0;
01391 }

int ast_wait_for_input ( int  fd,
int  ms 
)

Definition at line 948 of file utils.c.

References pollfd::events, pollfd::fd, poll(), POLLIN, and POLLPRI.

Referenced by action_waitevent(), ast_moh_destroy_one(), http_root(), and main().

00949 {
00950    struct pollfd pfd[1];
00951    memset(pfd, 0, sizeof(pfd));
00952    pfd[0].fd = fd;
00953    pfd[0].events = POLLIN|POLLPRI;
00954    return poll(pfd, 1, ms);
00955 }

static void base64_init ( void   )  [static]

Definition at line 411 of file utils.c.

Referenced by ast_utils_init().

00412 {
00413    int x;
00414    memset(b2a, -1, sizeof(b2a));
00415    /* Initialize base-64 Conversion table */
00416    for (x = 0; x < 26; x++) {
00417       /* A-Z */
00418       base64[x] = 'A' + x;
00419       b2a['A' + x] = x;
00420       /* a-z */
00421       base64[x + 26] = 'a' + x;
00422       b2a['a' + x] = x + 26;
00423       /* 0-9 */
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 }

static void* dummy_start ( void *  data  )  [static]

Definition at line 859 of file utils.c.

References AST_LIST_INSERT_TAIL, AST_MUTEX_KIND, ast_register_thread(), ast_unregister_thread(), thr_arg::data, free, thr_arg::name, pthread_mutex_init, pthread_mutex_lock, pthread_mutex_unlock, thr_arg::start_routine, and strdup.

Referenced by ast_pthread_create_stack().

00860 {
00861    void *ret;
00862    struct thr_arg a = *((struct thr_arg *) data);  /* make a local copy */
00863 #ifdef DEBUG_THREADS
00864    struct thr_lock_info *lock_info;
00865    pthread_mutexattr_t mutex_attr;
00866 #endif
00867 
00868    /* note that even though data->name is a pointer to allocated memory,
00869       we are not freeing it here because ast_register_thread is going to
00870       keep a copy of the pointer and then ast_unregister_thread will
00871       free the memory
00872    */
00873    free(data);
00874    ast_register_thread(a.name);
00875    pthread_cleanup_push(ast_unregister_thread, (void *) pthread_self());
00876 
00877 #ifdef DEBUG_THREADS
00878    if (!(lock_info = ast_threadstorage_get(&thread_lock_info, sizeof(*lock_info))))
00879       return NULL;
00880 
00881    lock_info->thread_id = pthread_self();
00882    lock_info->thread_name = strdup(a.name);
00883 
00884    pthread_mutexattr_init(&mutex_attr);
00885    pthread_mutexattr_settype(&mutex_attr, AST_MUTEX_KIND);
00886    pthread_mutex_init(&lock_info->lock, &mutex_attr);
00887    pthread_mutexattr_destroy(&mutex_attr);
00888 
00889    pthread_mutex_lock(&lock_infos_lock.mutex); /* Intentionally not the wrapper */
00890    AST_LIST_INSERT_TAIL(&lock_infos, lock_info, entry);
00891    pthread_mutex_unlock(&lock_infos_lock.mutex); /* Intentionally not the wrapper */
00892 #endif /* DEBUG_THREADS */
00893 
00894    ret = a.start_routine(a.data);
00895 
00896    pthread_cleanup_pop(1);
00897 
00898    return ret;
00899 }

static int gethostbyname_r ( const char *  name,
struct hostent *  ret,
char *  buf,
size_t  buflen,
struct hostent **  result,
int *  h_errnop 
) [static]

Reentrant replacement for gethostbyname for BSD-based systems.

Note:
This routine is derived from code originally written and placed in the public domain by Enzo Michelangeli <em@em.no-ip.com>

Definition at line 84 of file utils.c.

References ast_mutex_lock(), ast_mutex_unlock(), ERANGE, and gethostbyname.

Referenced by ast_gethostbyname().

00087 {
00088    int hsave;
00089    struct hostent *ph;
00090    ast_mutex_lock(&__mutex); /* begin critical area */
00091    hsave = h_errno;
00092 
00093    ph = gethostbyname(name);
00094    *h_errnop = h_errno; /* copy h_errno to *h_herrnop */
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       /* determine if we have enough space in buf */
00103 
00104       /* count how many addresses */
00105       for (p = ph->h_addr_list; *p != 0; p++) {
00106          nbytes += ph->h_length; /* addresses */
00107          nbytes += sizeof(*p); /* pointers */
00108          naddr++;
00109       }
00110       nbytes += sizeof(*p); /* one more for the terminating NULL */
00111 
00112       /* count how many aliases, and total length of strings */
00113       for (p = ph->h_aliases; *p != 0; p++) {
00114          nbytes += (strlen(*p)+1); /* aliases */
00115          nbytes += sizeof(*p);  /* pointers */
00116          naliases++;
00117       }
00118       nbytes += sizeof(*p); /* one more for the terminating NULL */
00119 
00120       /* here nbytes is the number of bytes required in buffer */
00121       /* as a terminator must be there, the minimum value is ph->h_length */
00122       if (nbytes > buflen) {
00123          *result = NULL;
00124          ast_mutex_unlock(&__mutex); /* end critical area */
00125          return ERANGE; /* not enough space in buf!! */
00126       }
00127 
00128       /* There is enough space. Now we need to do a deep copy! */
00129       /* Allocation in buffer:
00130          from [0] to [(naddr-1) * sizeof(*p)]:
00131          pointers to addresses
00132          at [naddr * sizeof(*p)]:
00133          NULL
00134          from [(naddr+1) * sizeof(*p)] to [(naddr+naliases) * sizeof(*p)] :
00135          pointers to aliases
00136          at [(naddr+naliases+1) * sizeof(*p)]:
00137          NULL
00138          then naddr addresses (fixed length), and naliases aliases (asciiz).
00139       */
00140 
00141       *ret = *ph;   /* copy whole structure (not its address!) */
00142 
00143       /* copy addresses */
00144       q = (char **)buf; /* pointer to pointers area (type: char **) */
00145       ret->h_addr_list = q; /* update pointer to address list */
00146       pbuf = buf + ((naddr + naliases + 2) * sizeof(*p)); /* skip that area */
00147       for (p = ph->h_addr_list; *p != 0; p++) {
00148          memcpy(pbuf, *p, ph->h_length); /* copy address bytes */
00149          *q++ = pbuf; /* the pointer is the one inside buf... */
00150          pbuf += ph->h_length; /* advance pbuf */
00151       }
00152       *q++ = NULL; /* address list terminator */
00153 
00154       /* copy aliases */
00155       ret->h_aliases = q; /* update pointer to aliases list */
00156       for (p = ph->h_aliases; *p != 0; p++) {
00157          strcpy(pbuf, *p); /* copy alias strings */
00158          *q++ = pbuf; /* the pointer is the one inside buf... */
00159          pbuf += strlen(*p); /* advance pbuf */
00160          *pbuf++ = 0; /* string terminator */
00161       }
00162       *q++ = NULL; /* terminator */
00163 
00164       strcpy(pbuf, ph->h_name); /* copy alias strings */
00165       ret->h_name = pbuf;
00166       pbuf += strlen(ph->h_name); /* advance pbuf */
00167       *pbuf++ = 0; /* string terminator */
00168 
00169       *result = ret;  /* and let *result point to structure */
00170 
00171    }
00172    h_errno = hsave;  /* restore h_errno */
00173    ast_mutex_unlock(&__mutex); /* end critical area */
00174 
00175    return (*result == NULL); /* return 0 on success, non-zero on error */
00176 }

int test_for_thread_safety ( void   ) 

Definition at line 265 of file utils.c.

References ast_mutex_lock(), ast_mutex_unlock(), ast_pthread_create, and test_thread_body().

Referenced by main().

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);          /* return 0 on success. */
00291 }

static void* test_thread_body ( void *  data  )  [static]

This is a regression test for recursive mutexes. test_for_thread_safety() will return 0 if recursive mutex locks are working properly, and non-zero if they are not working properly.

Definition at line 242 of file utils.c.

References ast_mutex_lock(), and ast_mutex_unlock().

Referenced by test_for_thread_safety().

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 } 

static struct timeval tvfix ( struct timeval  a  )  [static, read]

Definition at line 1089 of file utils.c.

References ast_log(), LOG_WARNING, and ONE_MILLION.

Referenced by ast_tvadd(), and ast_tvsub().

01090 {
01091    if (a.tv_usec >= ONE_MILLION) {
01092       ast_log(LOG_WARNING, "warning too large timestamp %ld.%ld\n",
01093          a.tv_sec, (long int) a.tv_usec);
01094       a.tv_sec += a.tv_usec / ONE_MILLION;
01095       a.tv_usec %= ONE_MILLION;
01096    } else if (a.tv_usec < 0) {
01097       ast_log(LOG_WARNING, "warning negative timestamp %ld.%ld\n",
01098          a.tv_sec, (long int) a.tv_usec);
01099       a.tv_usec = 0;
01100    }
01101    return a;
01102 }


Variable Documentation

const char __ast_string_field_empty[] = ""

Definition at line 1194 of file utils.c.

Referenced by __ast_string_field_init().

char b2a[256] [static]

Definition at line 68 of file utils.c.

char base64[64] [static]

Definition at line 67 of file utils.c.

Referenced by aji_act_hook().

int lock_count = 0 [static]

Definition at line 236 of file utils.c.

int test_errors = 0 [static]

Definition at line 237 of file utils.c.

pthread_t test_thread [static]

Definition at line 235 of file utils.c.


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