Fri Sep 25 19:28:45 2009

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)
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 1042 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 1184 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.

01186 {
01187    char *result = NULL;
01188 
01189    if (__builtin_expect(needed > mgr->space, 0)) {
01190       size_t new_size = mgr->size * 2;
01191 
01192       while (new_size < needed)
01193          new_size *= 2;
01194 
01195       if (add_string_pool(mgr, new_size))
01196          return NULL;
01197    }
01198 
01199    result = mgr->pool->base + mgr->used;
01200    mgr->used += needed;
01201    mgr->space -= needed;
01202    return result;
01203 }

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 1232 of file utils.c.

References __ast_string_field_index_build_va().

01235 {
01236    va_list ap1, ap2;
01237 
01238    va_start(ap1, format);
01239    va_start(ap2, format);     /* va_copy does not exist on FreeBSD */
01240 
01241    __ast_string_field_index_build_va(mgr, fields, num_fields, index, format, ap1, ap2);
01242 
01243    va_end(ap1);
01244    va_end(ap2);
01245 }

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 1205 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().

01208 {
01209    size_t needed;
01210 
01211    needed = vsnprintf(mgr->pool->base + mgr->used, mgr->space, format, ap1) + 1;
01212 
01213    va_end(ap1);
01214 
01215    if (needed > mgr->space) {
01216       size_t new_size = mgr->size * 2;
01217 
01218       while (new_size < needed)
01219          new_size *= 2;
01220 
01221       if (add_string_pool(mgr, new_size))
01222          return;
01223 
01224       vsprintf(mgr->pool->base + mgr->used, format, ap2);
01225    }
01226 
01227    fields[index] = mgr->pool->base + mgr->used;
01228    mgr->used += needed;
01229    mgr->space -= needed;
01230 }

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

Definition at line 1170 of file utils.c.

References __ast_string_field_empty, and add_string_pool().

01172 {
01173    int index;
01174 
01175    if (add_string_pool(mgr, size))
01176       return -1;
01177 
01178    for (index = 0; index < num_fields; index++)
01179       fields[index] = __ast_string_field_empty;
01180 
01181    return 0;
01182 }

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

Definition at line 1154 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().

01155 {
01156    struct ast_string_field_pool *pool;
01157 
01158    if (!(pool = ast_calloc(1, sizeof(*pool) + size)))
01159       return -1;
01160    
01161    pool->prev = mgr->pool;
01162    mgr->pool = pool;
01163    mgr->size = size;
01164    mgr->space = size;
01165    mgr->used = 0;
01166 
01167    return 0;
01168 }

int ast_atomic_fetchadd_int_slow ( volatile int *  p,
int  v 
)

Definition at line 1249 of file utils.c.

References ast_mutex_lock(), and ast_mutex_unlock().

01250 {
01251         int ret;
01252         ast_mutex_lock(&fetchadd_m);
01253         ret = *p;
01254         *p += v;
01255         ast_mutex_unlock(&fetchadd_m);
01256         return ret;
01257 }

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 977 of file utils.c.

Referenced by ast_build_string().

00978 {
00979    int result;
00980 
00981    if (!buffer || !*buffer || !space || !*space)
00982       return -1;
00983 
00984    result = vsnprintf(*buffer, *space, fmt, ap);
00985 
00986    if (result < 0)
00987       return -1;
00988    else if (result > *space)
00989       result = *space;
00990 
00991    *buffer += result;
00992    *space -= result;
00993    return 0;
00994 }

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 915 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().

00916 {
00917    /* Try to write string, but wait no more than ms milliseconds
00918       before timing out */
00919    int res = 0;
00920    struct pollfd fds[1];
00921    while (len) {
00922       res = write(fd, s, len);
00923       if ((res < 0) && (errno != EAGAIN)) {
00924          return -1;
00925       }
00926       if (res < 0)
00927          res = 0;
00928       len -= res;
00929       s += res;
00930       res = 0;
00931       if (len) {
00932          fds[0].fd = fd;
00933          fds[0].events = POLLOUT;
00934          /* Wait until writable again */
00935          res = poll(fds, 1, timeoutms);
00936          if (res < 1)
00937             return -1;
00938       }
00939    }
00940    return res;
00941 }

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 1285 of file utils.c.

References ast_realloc, ast_threadstorage::key, and offset.

01287 {
01288    int res;
01289    int offset = (append && (*buf)->len) ? strlen((*buf)->str) : 0;
01290 #if defined(DEBUG_THREADLOCALS)
01291    struct ast_dynamic_str *old_buf = *buf;
01292 #endif /* defined(DEBUG_THREADLOCALS) */
01293 
01294    res = vsnprintf((*buf)->str + offset, (*buf)->len - offset, fmt, ap);
01295 
01296    /* Check to see if there was not enough space in the string buffer to prepare
01297     * the string.  Also, if a maximum length is present, make sure the current
01298     * length is less than the maximum before increasing the size. */
01299    if ((res + offset + 1) > (*buf)->len && (max_len ? ((*buf)->len < max_len) : 1)) {
01300       /* Set the new size of the string buffer to be the size needed
01301        * to hold the resulting string (res) plus one byte for the
01302        * terminating '\0'.  If this size is greater than the max, set
01303        * the new length to be the maximum allowed. */
01304       if (max_len)
01305          (*buf)->len = ((res + offset + 1) < max_len) ? (res + offset + 1) : max_len;
01306       else
01307          (*buf)->len = res + offset + 1;
01308 
01309       if (!(*buf = ast_realloc(*buf, (*buf)->len + sizeof(*(*buf)))))
01310          return AST_DYNSTR_BUILD_FAILED;
01311 
01312       if (append)
01313          (*buf)->str[offset] = '\0';
01314 
01315       if (ts) {
01316          pthread_setspecific(ts->key, *buf);
01317 #if defined(DEBUG_THREADLOCALS)
01318          __ast_threadstorage_object_replace(old_buf, *buf, (*buf)->len + sizeof(*(*buf)));
01319 #endif /* defined(DEBUG_THREADLOCALS) */
01320       }
01321 
01322       /* va_end() and va_start() must be done before calling
01323        * vsnprintf() again. */
01324       return AST_DYNSTR_BUILD_RETRY;
01325    }
01326 
01327    return res;
01328 }

void ast_enable_packet_fragmentation ( int  sock  ) 

Definition at line 1330 of file utils.c.

References ast_log(), and LOG_WARNING.

Referenced by ast_netsock_bindaddr(), and reload_config().

01331 {
01332 #if defined(HAVE_IP_MTU_DISCOVER)
01333    int val = IP_PMTUDISC_DONT;
01334    
01335    if (setsockopt(sock, IPPROTO_IP, IP_MTU_DISCOVER, &val, sizeof(val)))
01336       ast_log(LOG_WARNING, "Unable to disable PMTU discovery. Large UDP packets may fail to be delivered when sent from this socket.\n");
01337 #endif /* HAVE_IP_MTU_DISCOVER */
01338 }

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 1025 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().

01026 {
01027    if (ast_strlen_zero(s))
01028       return 0;
01029 
01030    /* Determine if this is a false value */
01031    if (!strcasecmp(s, "no") ||
01032        !strcasecmp(s, "false") ||
01033        !strcasecmp(s, "n") ||
01034        !strcasecmp(s, "f") ||
01035        !strcasecmp(s, "0") ||
01036        !strcasecmp(s, "off"))
01037       return -1;
01038 
01039    return 0;
01040 }

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

get values from config variables.

Definition at line 1262 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().

01263 {
01264    long t;
01265    int scanned;
01266 
01267    if (dst == NULL)
01268       return -1;
01269 
01270    *dst = _default;
01271 
01272    if (ast_strlen_zero(src))
01273       return -1;
01274 
01275    /* only integer at the moment, but one day we could accept more formats */
01276    if (sscanf(src, "%ld%n", &t, &scanned) == 1) {
01277       *dst = t;
01278       if (consumed)
01279          *consumed = scanned;
01280       return 0;
01281    } else
01282       return -1;
01283 }

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(), 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 495 of file utils.c.

Referenced by __attempt_transmit(), __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(), dump_addr(), dump_ipaddr(), dundi_rexmit(), dundi_show_peer(), dundi_show_peers(), dundi_show_trans(), dundi_showframe(), dundi_xmit(), external_rtp_create(), find_callno(), 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().

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 }

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

Definition at line 1133 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().

01134 {
01135    int x, ofs = 0;
01136    const char *src;
01137 
01138    /* Join words into a string */
01139    if (!s)
01140       return;
01141    for (x = 0; ofs < len && w[x]; x++) {
01142       if (x > 0)
01143          s[ofs++] = ' ';
01144       for (src = w[x]; *src && ofs < len; src++)
01145          s[ofs++] = *src;
01146    }
01147    if (ofs == len)
01148       ofs--;
01149    s[ofs] = '\0';
01150 }

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 1107 of file utils.c.

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

01108 {
01109    char *dataPut = start;
01110    int inEscape = 0;
01111    int inQuotes = 0;
01112 
01113    for (; *start; start++) {
01114       if (inEscape) {
01115          *dataPut++ = *start;       /* Always goes verbatim */
01116          inEscape = 0;
01117       } else {
01118          if (*start == '\\') {
01119             inEscape = 1;      /* Do not copy \ into the data */
01120          } else if (*start == '\'') {
01121             inQuotes = 1 - inQuotes;   /* Do not copy ' into the data */
01122          } else {
01123             /* Replace , with |, unless in quotes */
01124             *dataPut++ = inQuotes ? *start : ((*start == find) ? replace_with : *start);
01125          }
01126       }
01127    }
01128    if (start != dataPut)
01129       *dataPut = 0;
01130    return dataPut;
01131 }

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 861 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.

00864 {
00865 #if !defined(LOW_MEMORY)
00866    struct thr_arg *a;
00867 #endif
00868 
00869    if (!attr) {
00870       attr = alloca(sizeof(*attr));
00871       pthread_attr_init(attr);
00872    }
00873 
00874 #ifdef __linux__
00875    /* On Linux, pthread_attr_init() defaults to PTHREAD_EXPLICIT_SCHED,
00876       which is kind of useless. Change this here to
00877       PTHREAD_INHERIT_SCHED; that way the -p option to set realtime
00878       priority will propagate down to new threads by default.
00879       This does mean that callers cannot set a different priority using
00880       PTHREAD_EXPLICIT_SCHED in the attr argument; instead they must set
00881       the priority afterwards with pthread_setschedparam(). */
00882    if ((errno = pthread_attr_setinheritsched(attr, PTHREAD_INHERIT_SCHED)))
00883       ast_log(LOG_WARNING, "pthread_attr_setinheritsched: %s\n", strerror(errno));
00884 #endif
00885 
00886    if (!stacksize)
00887       stacksize = AST_STACKSIZE;
00888 
00889    if ((errno = pthread_attr_setstacksize(attr, stacksize ? stacksize : AST_STACKSIZE)))
00890       ast_log(LOG_WARNING, "pthread_attr_setstacksize: %s\n", strerror(errno));
00891 
00892 #if !defined(LOW_MEMORY)
00893    if ((a = ast_malloc(sizeof(*a)))) {
00894       a->start_routine = start_routine;
00895       a->data = data;
00896       start_routine = dummy_start;
00897       asprintf(&a->name, "%-20s started at [%5d] %s %s()",
00898           start_fn, line, file, caller);
00899       data = a;
00900    }
00901 #endif /* !LOW_MEMORY */
00902 
00903    return pthread_create(thread, attr, start_routine, data); /* We're in ast_pthread_create, so it's okay */
00904 }

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 943 of file utils.c.

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

00944 {
00945    char *e;
00946    char *q;
00947 
00948    s = ast_strip(s);
00949    if ((q = strchr(beg_quotes, *s)) && *q != '\0') {
00950       e = s + strlen(s) - 1;
00951       if (*e == *(end_quotes + (q - beg_quotes))) {
00952          s++;
00953          *e = '\0';
00954       }
00955    }
00956 
00957    return s;
00958 }

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 1008 of file utils.c.

References ast_strlen_zero().

Referenced by __ast_http_load(), __login_exec(), _parse(), action_agent_callback_login(), action_agent_logoff(), 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().

01009 {
01010    if (ast_strlen_zero(s))
01011       return 0;
01012 
01013    /* Determine if this is a true value */
01014    if (!strcasecmp(s, "yes") ||
01015        !strcasecmp(s, "true") ||
01016        !strcasecmp(s, "y") ||
01017        !strcasecmp(s, "t") ||
01018        !strcasecmp(s, "1") ||
01019        !strcasecmp(s, "on"))
01020       return -1;
01021 
01022    return 0;
01023 }

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

Definition at line 1062 of file utils.c.

References ONE_MILLION, and tvfix().

Referenced by __get_from_jb(), agent_hangup(), agent_read(), ast_channel_bridge(), ast_channel_spy_trigger_wait(), 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(), NBScat_exec(), sched_settime(), sched_thread(), schedule_delivery(), and sla_process_timers().

01063 {
01064    /* consistency checks to guarantee usec in 0..999999 */
01065    a = tvfix(a);
01066    b = tvfix(b);
01067    a.tv_sec += b.tv_sec;
01068    a.tv_usec += b.tv_usec;
01069    if (a.tv_usec >= ONE_MILLION) {
01070       a.tv_sec++;
01071       a.tv_usec -= ONE_MILLION;
01072    }
01073    return a;
01074 }

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

Returns the difference of two timevals a - b.

Definition at line 1076 of file utils.c.

References ONE_MILLION, and tvfix().

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

01077 {
01078    /* consistency checks to guarantee usec in 0..999999 */
01079    a = tvfix(a);
01080    b = tvfix(b);
01081    a.tv_sec -= b.tv_sec;
01082    a.tv_usec -= b.tv_usec;
01083    if (a.tv_usec < 0) {
01084       a.tv_sec-- ;
01085       a.tv_usec += ONE_MILLION;
01086    }
01087    return a;
01088 }

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 960 of file utils.c.

Referenced by sip_notify().

00961 {
00962    char *e;
00963    char *work = s;
00964 
00965    while ((e = strchr(work, ';'))) {
00966       if ((e > work) && (*(e-1) == '\\')) {
00967          memmove(e - 1, e, strlen(e) + 1);
00968          work = e;
00969       } else {
00970          work = e + 1;
00971       }
00972    }
00973 
00974    return s;
00975 }

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 478 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().

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          /* have '%', two chars and correct parsing */
00486          *o = tmp;
00487          s += 2;  /* Will be incremented once more when we break out */
00488       } else /* all other cases, just copy */
00489          *o = *s;
00490    }
00491    *o = '\0';
00492 }

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 = NULL;
00453    char *buf = NULL;
00454 
00455    ast_copy_string(outbuf, string, buflen);
00456 
00457    /* If there's no characters to convert, just go through and don't do anything */
00458    while (*ptr) {
00459       if (((unsigned char) *ptr) > 127 || (doreserved && strchr(reserved, *ptr)) ) {
00460          /* Oops, we need to start working here */
00461          if (!buf) {
00462             buf = outbuf;
00463             out = buf + (ptr - string) ;  /* Set output ptr */
00464          }
00465          out += sprintf(out, "%%%02x", (unsigned char) *ptr);
00466       } else if (buf) {
00467          *out = *ptr;   /* Continue copying the string */
00468          out++;
00469       } 
00470       ptr++;
00471    }
00472    if (buf)
00473       *out = '\0';
00474    return outbuf;
00475 }

int ast_utils_init ( void   ) 

Definition at line 1340 of file utils.c.

References ast_cli_register_multiple(), and base64_init().

Referenced by main().

01341 {
01342    base64_init();
01343 #ifdef DEBUG_THREADS
01344    ast_cli_register_multiple(utils_cli, sizeof(utils_cli) / sizeof(utils_cli[0]));
01345 #endif
01346    return 0;
01347 }

int ast_wait_for_input ( int  fd,
int  ms 
)

Definition at line 906 of file utils.c.

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

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

00907 {
00908    struct pollfd pfd[1];
00909    memset(pfd, 0, sizeof(pfd));
00910    pfd[0].fd = fd;
00911    pfd[0].events = POLLIN|POLLPRI;
00912    return poll(pfd, 1, ms);
00913 }

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 817 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().

00818 {
00819    void *ret;
00820    struct thr_arg a = *((struct thr_arg *) data);  /* make a local copy */
00821 #ifdef DEBUG_THREADS
00822    struct thr_lock_info *lock_info;
00823    pthread_mutexattr_t mutex_attr;
00824 #endif
00825 
00826    /* note that even though data->name is a pointer to allocated memory,
00827       we are not freeing it here because ast_register_thread is going to
00828       keep a copy of the pointer and then ast_unregister_thread will
00829       free the memory
00830    */
00831    free(data);
00832    ast_register_thread(a.name);
00833    pthread_cleanup_push(ast_unregister_thread, (void *) pthread_self());
00834 
00835 #ifdef DEBUG_THREADS
00836    if (!(lock_info = ast_threadstorage_get(&thread_lock_info, sizeof(*lock_info))))
00837       return NULL;
00838 
00839    lock_info->thread_id = pthread_self();
00840    lock_info->thread_name = strdup(a.name);
00841 
00842    pthread_mutexattr_init(&mutex_attr);
00843    pthread_mutexattr_settype(&mutex_attr, AST_MUTEX_KIND);
00844    pthread_mutex_init(&lock_info->lock, &mutex_attr);
00845    pthread_mutexattr_destroy(&mutex_attr);
00846 
00847    pthread_mutex_lock(&lock_infos_lock.mutex); /* Intentionally not the wrapper */
00848    AST_LIST_INSERT_TAIL(&lock_infos, lock_info, entry);
00849    pthread_mutex_unlock(&lock_infos_lock.mutex); /* Intentionally not the wrapper */
00850 #endif /* DEBUG_THREADS */
00851 
00852    ret = a.start_routine(a.data);
00853 
00854    pthread_cleanup_pop(1);
00855 
00856    return ret;
00857 }

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 1047 of file utils.c.

References ast_log(), LOG_WARNING, and ONE_MILLION.

Referenced by ast_tvadd(), and ast_tvsub().

01048 {
01049    if (a.tv_usec >= ONE_MILLION) {
01050       ast_log(LOG_WARNING, "warning too large timestamp %ld.%ld\n",
01051          a.tv_sec, (long int) a.tv_usec);
01052       a.tv_sec += a.tv_usec / ONE_MILLION;
01053       a.tv_usec %= ONE_MILLION;
01054    } else if (a.tv_usec < 0) {
01055       ast_log(LOG_WARNING, "warning negative timestamp %ld.%ld\n",
01056          a.tv_sec, (long int) a.tv_usec);
01057       a.tv_usec = 0;
01058    }
01059    return a;
01060 }


Variable Documentation

const char __ast_string_field_empty[] = ""

Definition at line 1152 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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