Wed Apr 6 11:30:03 2011

Asterisk developer's documentation


dnsmgr.c File Reference

Background DNS update manager. More...

#include "asterisk.h"
#include "asterisk/_private.h"
#include <regex.h>
#include <signal.h>
#include "asterisk/dnsmgr.h"
#include "asterisk/linkedlists.h"
#include "asterisk/utils.h"
#include "asterisk/config.h"
#include "asterisk/sched.h"
#include "asterisk/cli.h"
#include "asterisk/manager.h"
#include "asterisk/acl.h"

Go to the source code of this file.

Data Structures

struct  ast_dnsmgr_entry
struct  entry_list
struct  refresh_info

Defines

#define REFRESH_DEFAULT   300

Functions

int ast_dnsmgr_changed (struct ast_dnsmgr_entry *entry)
 Check is see if a dnsmgr entry has changed.
ast_dnsmgr_entryast_dnsmgr_get (const char *name, struct ast_sockaddr *result, const char *service)
 Allocate a new DNS manager entry.
int ast_dnsmgr_lookup (const char *name, struct ast_sockaddr *result, struct ast_dnsmgr_entry **dnsmgr, const char *service)
 Allocate and initialize a DNS manager entry.
int ast_dnsmgr_refresh (struct ast_dnsmgr_entry *entry)
 Force a refresh of a dnsmgr entry.
void ast_dnsmgr_release (struct ast_dnsmgr_entry *entry)
 Free a DNS manager entry.
int dnsmgr_init (void)
static int dnsmgr_refresh (struct ast_dnsmgr_entry *entry, int verbose)
int dnsmgr_reload (void)
void dnsmgr_start_refresh (void)
static void * do_refresh (void *data)
static int do_reload (int loading)
static char * handle_cli_refresh (struct ast_cli_entry *e, int cmd, struct ast_cli_args *a)
static char * handle_cli_reload (struct ast_cli_entry *e, int cmd, struct ast_cli_args *a)
static char * handle_cli_status (struct ast_cli_entry *e, int cmd, struct ast_cli_args *a)
static int refresh_list (const void *data)

Variables

static struct ast_cli_entry cli_refresh = { .handler = handle_cli_refresh , .summary = "Performs an immediate refresh" ,__VA_ARGS__ }
static struct ast_cli_entry cli_reload = { .handler = handle_cli_reload , .summary = "Reloads the DNS manager configuration" ,__VA_ARGS__ }
static struct ast_cli_entry cli_status = { .handler = handle_cli_status , .summary = "Display the DNS manager status" ,__VA_ARGS__ }
static int enabled
static struct refresh_info master_refresh_info
static int refresh_interval
static ast_mutex_t refresh_lock = { { { NULL }, { 0 }, 0, { NULL }, { 0 }, {{{ 0 }}}, PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP } , 1, PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP }
static int refresh_sched = -1
static pthread_t refresh_thread = AST_PTHREADT_NULL
static struct sched_contextsched


Detailed Description

Background DNS update manager.

Author:
Kevin P. Fleming <kpfleming@digium.com>
Bug:
There is a minor race condition. In the event that an IP address of a dnsmgr managed host changes, there is the potential for the consumer of that address to access the in_addr data at the same time that the dnsmgr thread is in the middle of updating it to the new address.

Definition in file dnsmgr.c.


Define Documentation

#define REFRESH_DEFAULT   300

Definition at line 69 of file dnsmgr.c.

Referenced by do_reload().


Function Documentation

int ast_dnsmgr_changed ( struct ast_dnsmgr_entry entry  ) 

Check is see if a dnsmgr entry has changed.

Return values:
non-zero if the dnsmgr entry has changed since the last call to this function
zero if the dnsmgr entry has not changed since the last call to this function

Definition at line 193 of file dnsmgr.c.

References ast_mutex_lock, ast_mutex_unlock, ast_dnsmgr_entry::changed, and ast_dnsmgr_entry::lock.

Referenced by iax2_do_register().

00194 {
00195    int changed;
00196 
00197    ast_mutex_lock(&entry->lock);
00198 
00199    changed = entry->changed;
00200    entry->changed = 0;
00201 
00202    ast_mutex_unlock(&entry->lock);
00203    
00204    return changed;
00205 }

struct ast_dnsmgr_entry* ast_dnsmgr_get ( const char *  name,
struct ast_sockaddr result,
const char *  service 
)

Allocate a new DNS manager entry.

Parameters:
name the hostname
result where the DNS manager should store the IP address as it refreshes it.
service This function allocates a new DNS manager entry object, and fills it with the provided hostname and IP address. This function does not force an initial lookup of the IP address. So, generally, this should be used when the initial address is already known.
Returns:
a DNS manager entry
Version:
1.6.1 result changed from struct in_addr to struct sockaddr_in to store port number

1.8.0 result changed from struct ast_sockaddr_in to ast_sockaddr for IPv6 support

Definition at line 86 of file dnsmgr.c.

References ast_calloc, ast_mutex_init, AST_RWLIST_INSERT_HEAD, AST_RWLIST_UNLOCK, AST_RWLIST_WRLOCK, ast_strlen_zero(), ast_dnsmgr_entry::list, ast_dnsmgr_entry::lock, ast_dnsmgr_entry::name, ast_dnsmgr_entry::result, and ast_dnsmgr_entry::service.

Referenced by ast_dnsmgr_lookup().

00087 {
00088    struct ast_dnsmgr_entry *entry;
00089    int total_size = sizeof(*entry) + strlen(name) + (service ? strlen(service) + 1 : 0);
00090 
00091    if (!result || ast_strlen_zero(name) || !(entry = ast_calloc(1, total_size))) {
00092       return NULL;
00093    }
00094 
00095    entry->result = result;
00096    ast_mutex_init(&entry->lock);
00097    strcpy(entry->name, name);
00098    if (service) {
00099       entry->service = ((char *) entry) + sizeof(*entry) + strlen(name);
00100       strcpy(entry->service, service);
00101    }
00102 
00103    AST_RWLIST_WRLOCK(&entry_list);
00104    AST_RWLIST_INSERT_HEAD(&entry_list, entry, list);
00105    AST_RWLIST_UNLOCK(&entry_list);
00106 
00107    return entry;
00108 }

int ast_dnsmgr_lookup ( const char *  name,
struct ast_sockaddr result,
struct ast_dnsmgr_entry **  dnsmgr,
const char *  service 
)

Allocate and initialize a DNS manager entry.

Parameters:
name the hostname
result where to store the IP address as the DNS manager refreshes it. The address family is used as an input parameter to filter the returned adresses. if it is 0, both IPv4 * and IPv6 addresses can be returned.
dnsmgr Where to store the allocate DNS manager entry
service This function allocates a new DNS manager entry object, and fills it with the provided hostname and IP address. This function _does_ force an initial lookup, so it may block for some period of time.
Return values:
0 success
non-zero failure
Version:
1.6.1 result changed from struct in_addr to struct aockaddr_in to store port number

Definition at line 124 of file dnsmgr.c.

References ast_dnsmgr_get(), ast_get_ip_or_srv(), ast_strlen_zero(), ast_verb, enabled, and ast_dnsmgr_entry::result.

Referenced by __sip_subscribe_mwi_do(), build_peer(), iax2_append_register(), and transmit_register().

00125 {
00126    if (ast_strlen_zero(name) || !result || !dnsmgr) {
00127       return -1;
00128    }
00129 
00130    if (*dnsmgr && !strcasecmp((*dnsmgr)->name, name)) {
00131       return 0;
00132    }
00133 
00134    ast_verb(4, "doing dnsmgr_lookup for '%s'\n", name);
00135 
00136    /* do a lookup now but add a manager so it will automagically get updated in the background */
00137    ast_get_ip_or_srv(result, name, service);
00138    
00139    /* if dnsmgr is not enable don't bother adding an entry */
00140    if (!enabled) {
00141       return 0;
00142    }
00143    
00144    ast_verb(3, "adding dns manager for '%s'\n", name);
00145    *dnsmgr = ast_dnsmgr_get(name, result, service);
00146    return !*dnsmgr;
00147 }

int ast_dnsmgr_refresh ( struct ast_dnsmgr_entry entry  ) 

Force a refresh of a dnsmgr entry.

Return values:
non-zero if the result is different than the previous result
zero if the result is the same as the previous result

Definition at line 185 of file dnsmgr.c.

References dnsmgr_refresh().

Referenced by build_peer(), iax2_do_register(), and sip_reg_timeout().

00186 {
00187    return dnsmgr_refresh(entry, 0);
00188 }

void ast_dnsmgr_release ( struct ast_dnsmgr_entry entry  ) 

Free a DNS manager entry.

Parameters:
entry the DNS manager entry to free
Returns:
nothing

Definition at line 110 of file dnsmgr.c.

References ast_free, ast_mutex_destroy, AST_RWLIST_REMOVE, AST_RWLIST_UNLOCK, AST_RWLIST_WRLOCK, ast_verb, ast_dnsmgr_entry::list, ast_dnsmgr_entry::lock, and ast_dnsmgr_entry::name.

Referenced by delete_users(), peer_destructor(), sip_destroy_peer(), sip_registry_destroy(), and sip_subscribe_mwi_destroy().

00111 {
00112    if (!entry)
00113       return;
00114 
00115    AST_RWLIST_WRLOCK(&entry_list);
00116    AST_RWLIST_REMOVE(&entry_list, entry, list);
00117    AST_RWLIST_UNLOCK(&entry_list);
00118    ast_verb(4, "removing dns manager for '%s'\n", entry->name);
00119 
00120    ast_mutex_destroy(&entry->lock);
00121    ast_free(entry);
00122 }

int dnsmgr_init ( void   ) 

Provided by dnsmgr.c

Definition at line 352 of file dnsmgr.c.

References ast_cli_register(), ast_log(), cli_refresh, cli_reload, cli_status, do_reload(), LOG_ERROR, sched, and sched_context_create().

Referenced by main().

00353 {
00354    if (!(sched = sched_context_create())) {
00355       ast_log(LOG_ERROR, "Unable to create schedule context.\n");
00356       return -1;
00357    }
00358    ast_cli_register(&cli_reload);
00359    ast_cli_register(&cli_status);
00360    ast_cli_register(&cli_refresh);
00361    return do_reload(1);
00362 }

static int dnsmgr_refresh ( struct ast_dnsmgr_entry entry,
int  verbose 
) [static]

Definition at line 152 of file dnsmgr.c.

References ast_get_ip_or_srv(), ast_log(), ast_mutex_lock, ast_mutex_unlock, ast_sockaddr_cmp(), ast_sockaddr_copy(), ast_sockaddr_port, ast_sockaddr_set_port, ast_sockaddr_stringify(), ast_strdupa, ast_verb, ast_dnsmgr_entry::changed, ast_sockaddr::len, ast_dnsmgr_entry::lock, LOG_NOTICE, ast_dnsmgr_entry::name, ast_dnsmgr_entry::result, and ast_dnsmgr_entry::service.

Referenced by ast_dnsmgr_refresh(), and refresh_list().

00153 {
00154    struct ast_sockaddr tmp = { .len = 0, };
00155    int changed = 0;
00156 
00157    ast_mutex_lock(&entry->lock);
00158 
00159    if (verbose) {
00160       ast_verb(3, "refreshing '%s'\n", entry->name);
00161    }
00162 
00163    if (!ast_get_ip_or_srv(&tmp, entry->name, entry->service)) {
00164       if (!ast_sockaddr_port(&tmp)) {
00165          ast_sockaddr_set_port(&tmp, ast_sockaddr_port(entry->result));
00166       }
00167 
00168       if (ast_sockaddr_cmp(&tmp, entry->result)) {
00169          const char *old_addr = ast_strdupa(ast_sockaddr_stringify(entry->result));
00170          const char *new_addr = ast_strdupa(ast_sockaddr_stringify(&tmp));
00171 
00172          ast_log(LOG_NOTICE, "dnssrv: host '%s' changed from %s to %s\n",
00173                entry->name, old_addr, new_addr);
00174 
00175          ast_sockaddr_copy(entry->result, &tmp);
00176          changed = entry->changed = 1;
00177       }
00178    }
00179 
00180    ast_mutex_unlock(&entry->lock);
00181 
00182    return changed;
00183 }

int dnsmgr_reload ( void   ) 

Provided by dnsmgr.c

Definition at line 364 of file dnsmgr.c.

References do_reload().

00365 {
00366    return do_reload(0);
00367 }

void dnsmgr_start_refresh ( void   ) 

Provided by dnsmgr.c

Definition at line 246 of file dnsmgr.c.

References ast_sched_add_variable(), AST_SCHED_DEL, master_refresh_info, refresh_list(), and sched.

Referenced by main().

00247 {
00248    if (refresh_sched > -1) {
00249       AST_SCHED_DEL(sched, refresh_sched);
00250       refresh_sched = ast_sched_add_variable(sched, 100, refresh_list, &master_refresh_info, 1);
00251    }
00252 }

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

Definition at line 207 of file dnsmgr.c.

References ast_sched_runq(), ast_sched_wait(), and sched.

Referenced by do_reload(), and load_module().

00208 {
00209    for (;;) {
00210       pthread_testcancel();
00211       usleep((ast_sched_wait(sched)*1000));
00212       pthread_testcancel();
00213       ast_sched_runq(sched);
00214    }
00215    return NULL;
00216 }

static int do_reload ( int  loading  )  [static]

Definition at line 369 of file dnsmgr.c.

References ast_config_destroy(), ast_config_load2(), ast_log(), ast_mutex_lock, ast_mutex_unlock, ast_pthread_create_background, AST_PTHREADT_NULL, ast_sched_add_variable(), AST_SCHED_DEL, ast_true(), ast_variable_retrieve(), config, CONFIG_FLAG_FILEUNCHANGED, config_flags, CONFIG_STATUS_FILEINVALID, CONFIG_STATUS_FILEMISSING, CONFIG_STATUS_FILEUNCHANGED, do_refresh(), enabled, EVENT_FLAG_SYSTEM, LOG_ERROR, LOG_NOTICE, LOG_WARNING, manager_event, master_refresh_info, REFRESH_DEFAULT, refresh_interval, refresh_list(), and sched.

00370 {
00371    struct ast_config *config;
00372    struct ast_flags config_flags = { loading ? 0 : CONFIG_FLAG_FILEUNCHANGED };
00373    const char *interval_value;
00374    const char *enabled_value;
00375    int interval;
00376    int was_enabled;
00377    int res = -1;
00378 
00379    config = ast_config_load2("dnsmgr.conf", "dnsmgr", config_flags);
00380    if (config == CONFIG_STATUS_FILEMISSING || config == CONFIG_STATUS_FILEUNCHANGED || config == CONFIG_STATUS_FILEINVALID) {
00381       return 0;
00382    }
00383 
00384    /* ensure that no refresh cycles run while the reload is in progress */
00385    ast_mutex_lock(&refresh_lock);
00386 
00387    /* reset defaults in preparation for reading config file */
00388    refresh_interval = REFRESH_DEFAULT;
00389    was_enabled = enabled;
00390    enabled = 0;
00391 
00392    AST_SCHED_DEL(sched, refresh_sched);
00393 
00394    if (config) {
00395       if ((enabled_value = ast_variable_retrieve(config, "general", "enable"))) {
00396          enabled = ast_true(enabled_value);
00397       }
00398       if ((interval_value = ast_variable_retrieve(config, "general", "refreshinterval"))) {
00399          if (sscanf(interval_value, "%30d", &interval) < 1)
00400             ast_log(LOG_WARNING, "Unable to convert '%s' to a numeric value.\n", interval_value);
00401          else if (interval < 0)
00402             ast_log(LOG_WARNING, "Invalid refresh interval '%d' specified, using default\n", interval);
00403          else
00404             refresh_interval = interval;
00405       }
00406       ast_config_destroy(config);
00407    }
00408 
00409    if (enabled && refresh_interval)
00410       ast_log(LOG_NOTICE, "Managed DNS entries will be refreshed every %d seconds.\n", refresh_interval);
00411 
00412    /* if this reload enabled the manager, create the background thread
00413       if it does not exist */
00414    if (enabled) {
00415       if (!was_enabled && (refresh_thread == AST_PTHREADT_NULL)) {
00416          if (ast_pthread_create_background(&refresh_thread, NULL, do_refresh, NULL) < 0) {
00417             ast_log(LOG_ERROR, "Unable to start refresh thread.\n");
00418          }
00419       }
00420       /* make a background refresh happen right away */
00421       refresh_sched = ast_sched_add_variable(sched, 100, refresh_list, &master_refresh_info, 1);
00422       res = 0;
00423    }
00424    /* if this reload disabled the manager and there is a background thread,
00425       kill it */
00426    else if (!enabled && was_enabled && (refresh_thread != AST_PTHREADT_NULL)) {
00427       /* wake up the thread so it will exit */
00428       pthread_cancel(refresh_thread);
00429       pthread_kill(refresh_thread, SIGURG);
00430       pthread_join(refresh_thread, NULL);
00431       refresh_thread = AST_PTHREADT_NULL;
00432       res = 0;
00433    }
00434    else
00435       res = 0;
00436 
00437    ast_mutex_unlock(&refresh_lock);
00438    manager_event(EVENT_FLAG_SYSTEM, "Reload", "Module: DNSmgr\r\nStatus: %s\r/nMessage: DNSmgr reload Requested\r\n", enabled ? "Enabled" : "Disabled");
00439 
00440    return res;
00441 }

static char* handle_cli_refresh ( struct ast_cli_entry e,
int  cmd,
struct ast_cli_args a 
) [static]

Definition at line 275 of file dnsmgr.c.

References ast_cli_args::argc, ast_cli_args::argv, ast_cli(), CLI_GENERATE, CLI_INIT, CLI_SHOWUSAGE, CLI_SUCCESS, ast_cli_entry::command, enabled, refresh_info::entries, ast_cli_args::fd, refresh_info::filter, refresh_list(), refresh_info::regex_present, and ast_cli_entry::usage.

00276 {
00277    struct refresh_info info = {
00278       .entries = &entry_list,
00279       .verbose = 1,
00280    };
00281    switch (cmd) {
00282    case CLI_INIT:
00283       e->command = "dnsmgr refresh";
00284       e->usage = 
00285          "Usage: dnsmgr refresh [pattern]\n"
00286          "       Peforms an immediate refresh of the managed DNS entries.\n"
00287          "       Optional regular expression pattern is used to filter the entries to refresh.\n";
00288       return NULL;
00289    case CLI_GENERATE:
00290       return NULL;   
00291    }
00292 
00293    if (!enabled) {
00294       ast_cli(a->fd, "DNS Manager is disabled.\n");
00295       return 0;
00296    }
00297 
00298    if (a->argc > 3) {
00299       return CLI_SHOWUSAGE;
00300    }
00301 
00302    if (a->argc == 3) {
00303       if (regcomp(&info.filter, a->argv[2], REG_EXTENDED | REG_NOSUB)) {
00304          return CLI_SHOWUSAGE;
00305       } else {
00306          info.regex_present = 1;
00307       }
00308    }
00309 
00310    refresh_list(&info);
00311 
00312    if (info.regex_present) {
00313       regfree(&info.filter);
00314    }
00315 
00316    return CLI_SUCCESS;
00317 }

static char* handle_cli_reload ( struct ast_cli_entry e,
int  cmd,
struct ast_cli_args a 
) [static]

Definition at line 256 of file dnsmgr.c.

References ast_cli_args::argc, CLI_GENERATE, CLI_INIT, CLI_SHOWUSAGE, CLI_SUCCESS, ast_cli_entry::command, do_reload(), and ast_cli_entry::usage.

00257 {
00258    switch (cmd) {
00259    case CLI_INIT:
00260       e->command = "dnsmgr reload";
00261       e->usage = 
00262          "Usage: dnsmgr reload\n"
00263          "       Reloads the DNS manager configuration.\n";
00264       return NULL;
00265    case CLI_GENERATE:
00266       return NULL;   
00267    }
00268    if (a->argc > 2)
00269       return CLI_SHOWUSAGE;
00270 
00271    do_reload(0);
00272    return CLI_SUCCESS;
00273 }

static char* handle_cli_status ( struct ast_cli_entry e,
int  cmd,
struct ast_cli_args a 
) [static]

Definition at line 319 of file dnsmgr.c.

References ast_cli_args::argc, ast_cli(), AST_RWLIST_RDLOCK, AST_RWLIST_TRAVERSE, AST_RWLIST_UNLOCK, CLI_GENERATE, CLI_INIT, CLI_SHOWUSAGE, CLI_SUCCESS, ast_cli_entry::command, enabled, ast_cli_args::fd, ast_dnsmgr_entry::list, refresh_interval, and ast_cli_entry::usage.

00320 {
00321    int count = 0;
00322    struct ast_dnsmgr_entry *entry;
00323    switch (cmd) {
00324    case CLI_INIT:
00325       e->command = "dnsmgr status";
00326       e->usage = 
00327          "Usage: dnsmgr status\n"
00328          "       Displays the DNS manager status.\n";
00329       return NULL;
00330    case CLI_GENERATE:
00331       return NULL;   
00332    }
00333 
00334    if (a->argc > 2)
00335       return CLI_SHOWUSAGE;
00336 
00337    ast_cli(a->fd, "DNS Manager: %s\n", enabled ? "enabled" : "disabled");
00338    ast_cli(a->fd, "Refresh Interval: %d seconds\n", refresh_interval);
00339    AST_RWLIST_RDLOCK(&entry_list);
00340    AST_RWLIST_TRAVERSE(&entry_list, entry, list)
00341       count++;
00342    AST_RWLIST_UNLOCK(&entry_list);
00343    ast_cli(a->fd, "Number of entries: %d\n", count);
00344 
00345    return CLI_SUCCESS;
00346 }

static int refresh_list ( const void *  data  )  [static]

Definition at line 218 of file dnsmgr.c.

References ast_log(), ast_mutex_trylock, ast_mutex_unlock, AST_RWLIST_RDLOCK, AST_RWLIST_TRAVERSE, AST_RWLIST_UNLOCK, ast_verb, dnsmgr_refresh(), refresh_info::entries, refresh_info::filter, ast_dnsmgr_entry::list, LOG_WARNING, ast_dnsmgr_entry::name, refresh_interval, refresh_info::regex_present, and refresh_info::verbose.

Referenced by dnsmgr_start_refresh(), do_reload(), and handle_cli_refresh().

00219 {
00220    struct refresh_info *info = (struct refresh_info *)data;
00221    struct ast_dnsmgr_entry *entry;
00222 
00223    /* if a refresh or reload is already in progress, exit now */
00224    if (ast_mutex_trylock(&refresh_lock)) {
00225       if (info->verbose)
00226          ast_log(LOG_WARNING, "DNS Manager refresh already in progress.\n");
00227       return -1;
00228    }
00229 
00230    ast_verb(3, "Refreshing DNS lookups.\n");
00231    AST_RWLIST_RDLOCK(info->entries);
00232    AST_RWLIST_TRAVERSE(info->entries, entry, list) {
00233       if (info->regex_present && regexec(&info->filter, entry->name, 0, NULL, 0))
00234           continue;
00235 
00236       dnsmgr_refresh(entry, info->verbose);
00237    }
00238    AST_RWLIST_UNLOCK(info->entries);
00239 
00240    ast_mutex_unlock(&refresh_lock);
00241 
00242    /* automatically reschedule based on the interval */
00243    return refresh_interval * 1000;
00244 }


Variable Documentation

struct ast_cli_entry cli_refresh = { .handler = handle_cli_refresh , .summary = "Performs an immediate refresh" ,__VA_ARGS__ } [static]

Definition at line 349 of file dnsmgr.c.

Referenced by dnsmgr_init().

struct ast_cli_entry cli_reload = { .handler = handle_cli_reload , .summary = "Reloads the DNS manager configuration" ,__VA_ARGS__ } [static]

Definition at line 348 of file dnsmgr.c.

Referenced by dnsmgr_init(), load_module(), and unload_module().

struct ast_cli_entry cli_status = { .handler = handle_cli_status , .summary = "Display the DNS manager status" ,__VA_ARGS__ } [static]

Definition at line 350 of file dnsmgr.c.

int enabled [static]

Definition at line 71 of file dnsmgr.c.

struct refresh_info master_refresh_info [static]

Initial value:

 {
   .entries = &entry_list,
   .verbose = 0,
}

Definition at line 81 of file dnsmgr.c.

Referenced by dnsmgr_start_refresh(), and do_reload().

int refresh_interval [static]

Definition at line 72 of file dnsmgr.c.

Referenced by do_reload(), handle_cli_status(), and refresh_list().

ast_mutex_t refresh_lock = { { { NULL }, { 0 }, 0, { NULL }, { 0 }, {{{ 0 }}}, PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP } , 1, PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP } [static]

Definition at line 67 of file dnsmgr.c.

int refresh_sched = -1 [static]

Definition at line 49 of file dnsmgr.c.

pthread_t refresh_thread = AST_PTHREADT_NULL [static]

Definition at line 50 of file dnsmgr.c.

struct sched_context* sched [static]

Definition at line 48 of file dnsmgr.c.


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