return ret;
}
+
+struct ao2_container *ast_dns_get_nameservers(void)
+{
+#ifdef HAVE_RES_NINIT
+ struct __res_state dnsstate;
+#endif
+ struct __res_state *state;
+ struct ao2_container *nameservers;
+ int i;
+
+ nameservers = ast_str_container_alloc_options(AO2_ALLOC_OPT_LOCK_NOLOCK, 3);
+ if (!nameservers) {
+ return NULL;
+ }
+
+#ifdef HAVE_RES_NINIT
+ memset(&dnsstate, 0, sizeof(dnsstate));
+ res_ninit(&dnsstate);
+ state = &dnsstate;
+#else
+ ast_mutex_lock(&res_lock);
+ res_init();
+ state = &_res;
+#endif
+
+ for (i = 0; i < state->nscount; i++) {
+ ast_str_container_add(nameservers, ast_inet_ntoa(state->nsaddr_list[i].sin_addr));
+ }
+
+#ifdef HAVE_RES_NINIT
+#ifdef HAVE_RES_NDESTROY
+ res_ndestroy(&dnsstate);
+#else
+ res_nclose(&dnsstate);
+#endif
+#else
+#ifdef HAVE_RES_CLOSE
+ res_close();
+#endif
+ ast_mutex_unlock(&res_lock);
+#endif
+
+ return nameservers;
+}
\ No newline at end of file
#include "asterisk/sorcery.h"
#include "include/res_pjsip_private.h"
#include "asterisk/threadpool.h"
+#include "asterisk/dns.h"
#define TIMER_T1_MIN 100
#define DEFAULT_TIMER_T1 500
ast_sorcery_unref(system_sorcery);
}
+static int system_create_resolver_and_set_nameservers(void *data)
+{
+ struct ao2_container *discovered_nameservers;
+ struct ao2_iterator it_nameservers;
+ char *nameserver;
+ pj_status_t status;
+ pj_dns_resolver *resolver;
+ pj_str_t nameservers[PJ_DNS_RESOLVER_MAX_NS];
+ unsigned int count = 0;
+
+ discovered_nameservers = ast_dns_get_nameservers();
+ if (!discovered_nameservers) {
+ ast_log(LOG_ERROR, "Could not retrieve local system nameservers, resorting to system resolution\n");
+ return 0;
+ }
+
+ if (!ao2_container_count(discovered_nameservers)) {
+ ast_log(LOG_ERROR, "There are no local system nameservers configured, resorting to system resolution\n");
+ ao2_ref(discovered_nameservers, -1);
+ return -1;
+ }
+
+ if (!(resolver = pjsip_endpt_get_resolver(ast_sip_get_pjsip_endpoint()))) {
+ status = pjsip_endpt_create_resolver(ast_sip_get_pjsip_endpoint(), &resolver);
+ if (status != PJ_SUCCESS) {
+ ast_log(LOG_ERROR, "Could not create DNS resolver(%d), resorting to system resolution\n", status);
+ return 0;
+ }
+ }
+
+ it_nameservers = ao2_iterator_init(discovered_nameservers, 0);
+ while ((nameserver = ao2_iterator_next(&it_nameservers))) {
+ pj_strset2(&nameservers[count++], nameserver);
+ ao2_ref(nameserver, -1);
+
+ if (count == (PJ_DNS_RESOLVER_MAX_NS - 1)) {
+ break;
+ }
+ }
+ ao2_iterator_destroy(&it_nameservers);
+
+ status = pj_dns_resolver_set_ns(resolver, count, nameservers, NULL);
+
+ /* Since we no longer need the nameservers we can drop the list of them */
+ ao2_ref(discovered_nameservers, -1);
+
+ if (status != PJ_SUCCESS) {
+ ast_log(LOG_ERROR, "Could not set nameservers on DNS resolver in PJSIP(%d), resorting to system resolution\n",
+ status);
+ return 0;
+ }
+
+ if (!pjsip_endpt_get_resolver(ast_sip_get_pjsip_endpoint())) {
+ status = pjsip_endpt_set_resolver(ast_sip_get_pjsip_endpoint(), resolver);
+ if (status != PJ_SUCCESS) {
+ ast_log(LOG_ERROR, "Could not set DNS resolver in PJSIP(%d), resorting to system resolution\n", status);
+ return 0;
+ }
+ }
+
+ return 0;
+}
+
+void ast_sip_initialize_dns(void)
+{
+ ast_sip_push_task_synchronous(NULL, system_create_resolver_and_set_nameservers, NULL);
+}
\ No newline at end of file