Wed Aug 15 01:25:36 2007

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.
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 948 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 1090 of file utils.c.

01092 {
01093    char *result = NULL;
01094 
01095    if (__builtin_expect(needed > mgr->space, 0)) {
01096       size_t new_size = mgr->size * 2;
01097 
01098       while (new_size < needed)
01099          new_size *= 2;
01100 
01101       if (add_string_pool(mgr, new_size))
01102          return NULL;
01103    }
01104 
01105    result = mgr->pool->base + mgr->used;
01106    mgr->used += needed;
01107    mgr->space -= needed;
01108    return result;
01109 }

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 1138 of file utils.c.

01141 {
01142    va_list ap1, ap2;
01143 
01144    va_start(ap1, format);
01145    va_start(ap2, format);     /* va_copy does not exist on FreeBSD */
01146 
01147    __ast_string_field_index_build_va(mgr, fields, num_fields, index, format, ap1, ap2);
01148 
01149    va_end(ap1);
01150    va_end(ap2);
01151 }

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 1111 of file utils.c.

Referenced by __ast_string_field_index_build().

01114 {
01115    size_t needed;
01116 
01117    needed = vsnprintf(mgr->pool->base + mgr->used, mgr->space, format, ap1) + 1;
01118 
01119    va_end(ap1);
01120 
01121    if (needed > mgr->space) {
01122       size_t new_size = mgr->size * 2;
01123 
01124       while (new_size < needed)
01125          new_size *= 2;
01126 
01127       if (add_string_pool(mgr, new_size))
01128          return;
01129 
01130       vsprintf(mgr->pool->base + mgr->used, format, ap2);
01131    }
01132 
01133    fields[index] = mgr->pool->base + mgr->used;
01134    mgr->used += needed;
01135    mgr->space -= needed;
01136 }

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

Definition at line 1076 of file utils.c.

01078 {
01079    int index;
01080 
01081    if (add_string_pool(mgr, size))
01082       return -1;
01083 
01084    for (index = 0; index < num_fields; index++)
01085       fields[index] = __ast_string_field_empty;
01086 
01087    return 0;
01088 }

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

Definition at line 1060 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().

01061 {
01062    struct ast_string_field_pool *pool;
01063 
01064    if (!(pool = ast_calloc(1, sizeof(*pool) + size)))
01065       return -1;
01066    
01067    pool->prev = mgr->pool;
01068    mgr->pool = pool;
01069    mgr->size = size;
01070    mgr->space = size;
01071    mgr->used = 0;
01072 
01073    return 0;
01074 }

int ast_atomic_fetchadd_int_slow ( volatile int *  p,
int  v 
)

Definition at line 1155 of file utils.c.

01156 {
01157         int ret;
01158         ast_mutex_lock(&fetchadd_m);
01159         ret = *p;
01160         *p += v;
01161         ast_mutex_unlock(&fetchadd_m);
01162         return ret;
01163 }

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.

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,
  ... 
)

Definition at line 902 of file utils.c.

References ast_build_string_va().

Referenced by __queues_show(), add_codec_to_sdp(), add_noncodec_to_sdp(), add_sdp(), add_t38_sdp(), ast_cdr_serialize_variables(), ast_http_setcookie(), config_odbc(), config_pgsql(), function_realtime_read(), generic_http_callback(), html_translate(), httpstatus_callback(), initreqprep(), pbx_builtin_serialize_variables(), print_uptimestr(), show_translation(), show_translation_deprecated(), transmit_notify_with_mwi(), transmit_state_notify(), and xml_translate().

00903 {
00904    va_list ap;
00905    int result;
00906 
00907    va_start(ap, fmt);
00908    result = ast_build_string_va(buffer, space, fmt, ap);
00909    va_end(ap);
00910 
00911    return result;
00912 }

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 883 of file utils.c.

Referenced by ast_build_string().

00884 {
00885    int result;
00886 
00887    if (!buffer || !*buffer || !space || !*space)
00888       return -1;
00889 
00890    result = vsnprintf(*buffer, *space, fmt, ap);
00891 
00892    if (result < 0)
00893       return -1;
00894    else if (result > *space)
00895       result = *space;
00896 
00897    *buffer += result;
00898    *space -= result;
00899    return 0;
00900 }

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 838 of file utils.c.

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

00839 {
00840    /* Try to write string, but wait no more than ms milliseconds
00841       before timing out */
00842    int res = 0;
00843    struct pollfd fds[1];
00844    while (len) {
00845       res = write(fd, s, len);
00846       if ((res < 0) && (errno != EAGAIN)) {
00847          return -1;
00848       }
00849       if (res < 0)
00850          res = 0;
00851       len -= res;
00852       s += res;
00853       res = 0;
00854       if (len) {
00855          fds[0].fd = fd;
00856          fds[0].events = POLLOUT;
00857          /* Wait until writable again */
00858          res = poll(fds, 1, timeoutms);
00859          if (res < 1)
00860             return -1;
00861       }
00862    }
00863    return res;
00864 }

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 1191 of file utils.c.

01193 {
01194    int res;
01195    int offset = (append && (*buf)->len) ? strlen((*buf)->str) : 0;
01196 #if defined(DEBUG_THREADLOCALS)
01197    struct ast_dynamic_str *old_buf = *buf;
01198 #endif /* defined(DEBUG_THREADLOCALS) */
01199 
01200    res = vsnprintf((*buf)->str + offset, (*buf)->len - offset, fmt, ap);
01201 
01202    /* Check to see if there was not enough space in the string buffer to prepare
01203     * the string.  Also, if a maximum length is present, make sure the current
01204     * length is less than the maximum before increasing the size. */
01205    if ((res + offset + 1) > (*buf)->len && (max_len ? ((*buf)->len < max_len) : 1)) {
01206       /* Set the new size of the string buffer to be the size needed
01207        * to hold the resulting string (res) plus one byte for the
01208        * terminating '\0'.  If this size is greater than the max, set
01209        * the new length to be the maximum allowed. */
01210       if (max_len)
01211          (*buf)->len = ((res + offset + 1) < max_len) ? (res + offset + 1) : max_len;
01212       else
01213          (*buf)->len = res + offset + 1;
01214 
01215       if (!(*buf = ast_realloc(*buf, (*buf)->len + sizeof(*(*buf)))))
01216          return AST_DYNSTR_BUILD_FAILED;
01217 
01218       if (append)
01219          (*buf)->str[offset] = '\0';
01220 
01221       if (ts) {
01222          pthread_setspecific(ts->key, *buf);
01223 #if defined(DEBUG_THREADLOCALS)
01224          __ast_threadstorage_object_replace(old_buf, *buf, (*buf)->len + sizeof(*(*buf)));
01225 #endif /* defined(DEBUG_THREADLOCALS) */
01226       }
01227 
01228       /* va_end() and va_start() must be done before calling
01229        * vsnprintf() again. */
01230       return AST_DYNSTR_BUILD_RETRY;
01231    }
01232 
01233    return res;
01234 }

void ast_enable_packet_fragmentation ( int  sock  ) 

Definition at line 1236 of file utils.c.

References ast_log(), and LOG_WARNING.

Referenced by ast_netsock_bindaddr(), and reload_config().

01237 {
01238 #if defined(HAVE_IP_MTU_DISCOVER)
01239    int val = IP_PMTUDISC_DONT;
01240    
01241    if (setsockopt(sock, IPPROTO_IP, IP_MTU_DISCOVER, &val, sizeof(val)))
01242       ast_log(LOG_WARNING, "Unable to disable PMTU discovery. Large UDP packets may fail to be delivered when sent from this socket.\n");
01243 #endif /* HAVE_IP_MTU_DISCOVER */
01244 }

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 931 of file utils.c.

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().

00932 {
00933    if (ast_strlen_zero(s))
00934       return 0;
00935 
00936    /* Determine if this is a false value */
00937    if (!strcasecmp(s, "no") ||
00938        !strcasecmp(s, "false") ||
00939        !strcasecmp(s, "n") ||
00940        !strcasecmp(s, "f") ||
00941        !strcasecmp(s, "0") ||
00942        !strcasecmp(s, "off"))
00943       return -1;
00944 
00945    return 0;
00946 }

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

get values from config variables.

Definition at line 1168 of file utils.c.

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

01169 {
01170    long t;
01171    int scanned;
01172 
01173    if (dst == NULL)
01174       return -1;
01175 
01176    *dst = _default;
01177 
01178    if (ast_strlen_zero(src))
01179       return -1;
01180 
01181    /* only integer at the moment, but one day we could accept more formats */
01182    if (sscanf(src, "%ld%n", &t, &scanned) == 1) {
01183       *dst = t;
01184       if (consumed)
01185          *consumed = scanned;
01186       return 0;
01187    } else
01188       return -1;
01189 }

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.

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(), 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(), 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 1039 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().

01040 {
01041    int x, ofs = 0;
01042    const char *src;
01043 
01044    /* Join words into a string */
01045    if (!s)
01046       return;
01047    for (x = 0; ofs < len && w[x]; x++) {
01048       if (x > 0)
01049          s[ofs++] = ' ';
01050       for (src = w[x]; *src && ofs < len; src++)
01051          s[ofs++] = *src;
01052    }
01053    if (ofs == len)
01054       ofs--;
01055    s[ofs] = '\0';
01056 }

void ast_md5_hash ( char *  output,
char *  input 
)

Produce 32 char MD5 hash of value.

Definition at line 294 of file utils.c.

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 1013 of file utils.c.

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

01014 {
01015    char *dataPut = start;
01016    int inEscape = 0;
01017    int inQuotes = 0;
01018 
01019    for (; *start; start++) {
01020       if (inEscape) {
01021          *dataPut++ = *start;       /* Always goes verbatim */
01022          inEscape = 0;
01023       } else {
01024          if (*start == '\\') {
01025             inEscape = 1;      /* Do not copy \ into the data */
01026          } else if (*start == '\'') {
01027             inQuotes = 1 - inQuotes;   /* Do not copy ' into the data */
01028          } else {
01029             /* Replace , with |, unless in quotes */
01030             *dataPut++ = inQuotes ? *start : ((*start == find) ? replace_with : *start);
01031          }
01032       }
01033    }
01034    if (start != dataPut)
01035       *dataPut = 0;
01036    return dataPut;
01037 }

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 784 of file utils.c.

00787 {
00788 #if !defined(LOW_MEMORY)
00789    struct thr_arg *a;
00790 #endif
00791 
00792    if (!attr) {
00793       attr = alloca(sizeof(*attr));
00794       pthread_attr_init(attr);
00795    }
00796 
00797 #ifdef __linux__
00798    /* On Linux, pthread_attr_init() defaults to PTHREAD_EXPLICIT_SCHED,
00799       which is kind of useless. Change this here to
00800       PTHREAD_INHERIT_SCHED; that way the -p option to set realtime
00801       priority will propagate down to new threads by default.
00802       This does mean that callers cannot set a different priority using
00803       PTHREAD_EXPLICIT_SCHED in the attr argument; instead they must set
00804       the priority afterwards with pthread_setschedparam(). */
00805    if ((errno = pthread_attr_setinheritsched(attr, PTHREAD_INHERIT_SCHED)))
00806       ast_log(LOG_WARNING, "pthread_attr_setinheritsched: %s\n", strerror(errno));
00807 #endif
00808 
00809    if (!stacksize)
00810       stacksize = AST_STACKSIZE;
00811 
00812    if ((errno = pthread_attr_setstacksize(attr, stacksize ? stacksize : AST_STACKSIZE)))
00813       ast_log(LOG_WARNING, "pthread_attr_setstacksize: %s\n", strerror(errno));
00814 
00815 #if !defined(LOW_MEMORY)
00816    if ((a = ast_malloc(sizeof(*a)))) {
00817       a->start_routine = start_routine;
00818       a->data = data;
00819       start_routine = dummy_start;
00820       asprintf(&a->name, "%-20s started at [%5d] %s %s()",
00821           start_fn, line, file, caller);
00822       data = a;
00823    }
00824 #endif /* !LOW_MEMORY */
00825 
00826    return pthread_create(thread, attr, start_routine, data); /* We're in ast_pthread_create, so it's okay */
00827 }

long int ast_random ( void   ) 

Definition at line 1003 of file utils.c.

Referenced by acf_rand_exec(), agent_new(), ast_lock_path(), ast_rtp_new_init(), ast_rtp_new_with_bindaddr(), ast_udptl_new_with_bindaddr(), authenticate_request(), build_gateway(), build_iv(), build_reply_digest(), calc_metric(), calc_rxstamp(), check_auth(), generate_random_string(), get_trans_id(), gtalk_alloc(), gtalk_create_candidates(), gtalk_new(), iax2_start_transfer(), local_new(), make_email_file(), make_our_tag(), moh_files_alloc(), ogg_vorbis_rewrite(), page_exec(), process_message(), random_exec(), reg_source_db(), registry_authrequest(), reqprep(), sip_alloc(), socket_read(), start_rtp(), stun_req_id(), transmit_fake_auth_response(), transmit_invite(), transmit_register(), transmit_response_using_temp(), try_calling(), try_firmware(), and zt_new().

01004 {
01005    long int res;
01006    ast_mutex_lock(&randomlock);
01007    res = random();
01008    ast_mutex_unlock(&randomlock);
01009    return res;
01010 }

void ast_sha1_hash ( char *  output,
char *  input 
)

Produce 40 char SHA1 hash of value.

Definition at line 310 of file utils.c.

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 866 of file utils.c.

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

00867 {
00868    char *e;
00869    char *q;
00870 
00871    s = ast_strip(s);
00872    if ((q = strchr(beg_quotes, *s)) && *q != '\0') {
00873       e = s + strlen(s) - 1;
00874       if (*e == *(end_quotes + (q - beg_quotes))) {
00875          s++;
00876          *e = '\0';
00877       }
00878    }
00879 
00880    return s;
00881 }

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 914 of file utils.c.

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().

00915 {
00916    if (ast_strlen_zero(s))
00917       return 0;
00918 
00919    /* Determine if this is a true value */
00920    if (!strcasecmp(s, "yes") ||
00921        !strcasecmp(s, "true") ||
00922        !strcasecmp(s, "y") ||
00923        !strcasecmp(s, "t") ||
00924        !strcasecmp(s, "1") ||
00925        !strcasecmp(s, "on"))
00926       return -1;
00927 
00928    return 0;
00929 }

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

Definition at line 968 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().

00969 {
00970    /* consistency checks to guarantee usec in 0..999999 */
00971    a = tvfix(a);
00972    b = tvfix(b);
00973    a.tv_sec += b.tv_sec;
00974    a.tv_usec += b.tv_usec;
00975    if (a.tv_usec >= ONE_MILLION) {
00976       a.tv_sec++;
00977       a.tv_usec -= ONE_MILLION;
00978    }
00979    return a;
00980 }

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

Returns the difference of two timevals a - b.

Definition at line 982 of file utils.c.

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

00983 {
00984    /* consistency checks to guarantee usec in 0..999999 */
00985    a = tvfix(a);
00986    b = tvfix(b);
00987    a.tv_sec -= b.tv_sec;
00988    a.tv_usec -= b.tv_usec;
00989    if (a.tv_usec < 0) {
00990       a.tv_sec-- ;
00991       a.tv_usec += ONE_MILLION;
00992    }
00993    return a;
00994 }

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(), 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 1246 of file utils.c.

Referenced by main().

01247 {
01248    base64_init();
01249 #ifdef DEBUG_THREADS
01250    ast_cli_register_multiple(utils_cli, sizeof(utils_cli) / sizeof(utils_cli[0]));
01251 #endif
01252    return 0;
01253 }

int ast_wait_for_input ( int  fd,
int  ms 
)

Definition at line 829 of file utils.c.

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

00830 {
00831    struct pollfd pfd[1];
00832    memset(pfd, 0, sizeof(pfd));
00833    pfd[0].fd = fd;
00834    pfd[0].events = POLLIN|POLLPRI;
00835    return poll(pfd, 1, ms);
00836 }

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 745 of file utils.c.

References AST_LIST_INSERT_TAIL, 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().

00746 {
00747    void *ret;
00748    struct thr_arg a = *((struct thr_arg *) data);  /* make a local copy */
00749 #ifdef DEBUG_THREADS
00750    struct thr_lock_info *lock_info;
00751 #endif
00752 
00753    /* note that even though data->name is a pointer to allocated memory,
00754       we are not freeing it here because ast_register_thread is going to
00755       keep a copy of the pointer and then ast_unregister_thread will
00756       free the memory
00757    */
00758    free(data);
00759    ast_register_thread(a.name);
00760    pthread_cleanup_push(ast_unregister_thread, (void *) pthread_self());
00761 
00762 #ifdef DEBUG_THREADS
00763    if (!(lock_info = ast_threadstorage_get(&thread_lock_info, sizeof(*lock_info))))
00764       return NULL;
00765 
00766    lock_info->thread_id = pthread_self();
00767    lock_info->thread_name = strdup(a.name);
00768    pthread_mutex_init(&lock_info->lock, NULL);
00769 
00770    pthread_mutex_lock(&lock_infos_lock.mutex); /* Intentionally not the wrapper */
00771    AST_LIST_INSERT_TAIL(&lock_infos, lock_info, entry);
00772    pthread_mutex_unlock(&lock_infos_lock.mutex); /* Intentionally not the wrapper */
00773 #endif /* DEBUG_THREADS */
00774 
00775    ret = a.start_routine(a.data);
00776 
00777    pthread_cleanup_pop(1);
00778 
00779    return ret;
00780 }

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.

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 953 of file utils.c.

References ast_log(), LOG_WARNING, and ONE_MILLION.

Referenced by ast_tvadd(), and ast_tvsub().

00954 {
00955    if (a.tv_usec >= ONE_MILLION) {
00956       ast_log(LOG_WARNING, "warning too large timestamp %ld.%ld\n",
00957          a.tv_sec, (long int) a.tv_usec);
00958       a.tv_sec += a.tv_usec / ONE_MILLION;
00959       a.tv_usec %= ONE_MILLION;
00960    } else if (a.tv_usec < 0) {
00961       ast_log(LOG_WARNING, "warning negative timestamp %ld.%ld\n",
00962          a.tv_sec, (long int) a.tv_usec);
00963       a.tv_usec = 0;
00964    }
00965    return a;
00966 }


Variable Documentation

const char __ast_string_field_empty[] = ""

Definition at line 1058 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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