isc_event_t *
isc_event_allocate(isc_mem_t *mctx, void *sender, isc_eventtype_t type,
isc_taskaction_t action, const void *arg, size_t size)
{
isc_event_t *event;
void *deconst_arg;
REQUIRE(size >= sizeof(struct isc_event));
REQUIRE(action != NULL);
event = isc_mem_get(mctx, size);
if (event == NULL)
return (NULL);
/*
* Removing the const attribute from "arg" is the best of two
* evils here. If the event->ev_arg member is made const, then
* it affects a great many users of the task/event subsystem
* which are not passing in an "arg" which starts its life as
* const. Changing isc_event_allocate() and isc_task_onshutdown()
* to not have "arg" prototyped as const (which is quite legitimate,
* because neither of those functions modify arg) can cause
* compiler whining anytime someone does want to use a const
* arg that they themselves never modify, such as with
* gcc -Wwrite-strings and using a string "arg".
*/
DE_CONST(arg, deconst_arg);
ISC_EVENT_INIT(event, size, 0, NULL, type, action, deconst_arg,
sender, destroy, mctx);
return (event);
}
isc_result_t
isc_ratelimiter_create(isc_mem_t *mctx, isc_timermgr_t *timermgr,
isc_task_t *task, isc_ratelimiter_t **ratelimiterp)
{
isc_result_t result;
isc_ratelimiter_t *rl;
INSIST(ratelimiterp != NULL && *ratelimiterp == NULL);
rl = isc_mem_get(mctx, sizeof(*rl));
if (rl == NULL)
return ISC_R_NOMEMORY;
rl->mctx = mctx;
rl->refs = 1;
rl->task = task;
isc_interval_set(&rl->interval, 0, 0);
rl->timer = NULL;
rl->pertic = 1;
rl->state = isc_ratelimiter_idle;
ISC_LIST_INIT(rl->pending);
result = isc_mutex_init(&rl->lock);
if (result != ISC_R_SUCCESS)
goto free_mem;
result = isc_timer_create(timermgr, isc_timertype_inactive,
NULL, NULL, rl->task, ratelimiter_tick,
rl, &rl->timer);
if (result != ISC_R_SUCCESS)
goto free_mutex;
/*
* Increment the reference count to indicate that we may
* (soon) have events outstanding.
*/
rl->refs++;
ISC_EVENT_INIT(&rl->shutdownevent,
sizeof(isc_event_t),
0, NULL, ISC_RATELIMITEREVENT_SHUTDOWN,
ratelimiter_shutdowncomplete, rl, rl, NULL, NULL);
*ratelimiterp = rl;
return (ISC_R_SUCCESS);
free_mutex:
DESTROYLOCK(&rl->lock);
free_mem:
isc_mem_put(mctx, rl, sizeof(*rl));
return (result);
}
isc_result_t
dns_tcpmsg_readmessage(dns_tcpmsg_t *tcpmsg,
isc_task_t *task, isc_taskaction_t action, void *arg)
{
isc_result_t result;
isc_region_t region;
REQUIRE(VALID_TCPMSG(tcpmsg));
REQUIRE(task != NULL);
REQUIRE(tcpmsg->task == NULL); /* not currently in use */
if (tcpmsg->buffer.base != NULL) {
isc_mem_put(tcpmsg->mctx, tcpmsg->buffer.base,
tcpmsg->buffer.length);
tcpmsg->buffer.base = NULL;
tcpmsg->buffer.length = 0;
}
tcpmsg->task = task;
tcpmsg->action = action;
tcpmsg->arg = arg;
tcpmsg->result = ISC_R_UNEXPECTED; /* unknown right now */
ISC_EVENT_INIT(&tcpmsg->event, sizeof(isc_event_t), 0, 0,
DNS_EVENT_TCPMSG, action, arg, tcpmsg,
NULL, NULL);
region.base = (unsigned char *)&tcpmsg->size;
region.length = 2; /* isc_uint16_t */
result = isc_socket_recv(tcpmsg->sock, ®ion, 0,
tcpmsg->task, recv_length, tcpmsg);
if (result != ISC_R_SUCCESS)
tcpmsg->task = NULL;
return (result);
}
isc_result_t
isccc_ccmsg_readmessage(isccc_ccmsg_t *ccmsg,
isc_task_t *task, isc_taskaction_t action, void *arg)
{
isc_result_t result;
isc_region_t region;
REQUIRE(VALID_CCMSG(ccmsg));
REQUIRE(task != NULL);
REQUIRE(ccmsg->task == NULL); /* not currently in use */
if (ccmsg->buffer.base != NULL) {
isc_mem_put(ccmsg->mctx, ccmsg->buffer.base,
ccmsg->buffer.length);
ccmsg->buffer.base = NULL;
ccmsg->buffer.length = 0;
}
ccmsg->task = task;
ccmsg->action = action;
ccmsg->arg = arg;
ccmsg->result = ISC_R_UNEXPECTED; /* unknown right now */
ISC_EVENT_INIT(&ccmsg->event, sizeof(isc_event_t), 0, 0,
ISCCC_EVENT_CCMSG, action, arg, ccmsg,
NULL, NULL);
region.base = (unsigned char *)&ccmsg->size;
region.length = 4; /* isc_uint32_t */
result = isc_socket_recv(ccmsg->sock, ®ion, 0,
ccmsg->task, recv_length, ccmsg);
if (result != ISC_R_SUCCESS)
ccmsg->task = NULL;
return (result);
}
isc_result_t
dns_view_create(isc_mem_t *mctx, dns_rdataclass_t rdclass,
const char *name, dns_view_t **viewp)
{
dns_view_t *view;
isc_result_t result;
/*
* Create a view.
*/
REQUIRE(name != NULL);
REQUIRE(viewp != NULL && *viewp == NULL);
view = isc_mem_get(mctx, sizeof(*view));
if (view == NULL)
return (ISC_R_NOMEMORY);
view->mctx = NULL;
isc_mem_attach(mctx, &view->mctx);
view->name = isc_mem_strdup(mctx, name);
if (view->name == NULL) {
result = ISC_R_NOMEMORY;
goto cleanup_view;
}
result = isc_mutex_init(&view->lock);
if (result != ISC_R_SUCCESS)
goto cleanup_name;
view->zonetable = NULL;
if (isc_bind9) {
result = dns_zt_create(mctx, rdclass, &view->zonetable);
if (result != ISC_R_SUCCESS) {
UNEXPECTED_ERROR(__FILE__, __LINE__,
"dns_zt_create() failed: %s",
isc_result_totext(result));
result = ISC_R_UNEXPECTED;
goto cleanup_mutex;
}
}
view->secroots_priv = NULL;
view->fwdtable = NULL;
result = dns_fwdtable_create(mctx, &view->fwdtable);
if (result != ISC_R_SUCCESS) {
UNEXPECTED_ERROR(__FILE__, __LINE__,
"dns_fwdtable_create() failed: %s",
isc_result_totext(result));
result = ISC_R_UNEXPECTED;
goto cleanup_zt;
}
view->acache = NULL;
view->cache = NULL;
view->cachedb = NULL;
ISC_LIST_INIT(view->dlz_searched);
ISC_LIST_INIT(view->dlz_unsearched);
view->hints = NULL;
view->resolver = NULL;
view->adb = NULL;
view->requestmgr = NULL;
view->rdclass = rdclass;
view->frozen = ISC_FALSE;
view->task = NULL;
result = isc_refcount_init(&view->references, 1);
if (result != ISC_R_SUCCESS)
goto cleanup_fwdtable;
view->weakrefs = 0;
view->attributes = (DNS_VIEWATTR_RESSHUTDOWN|DNS_VIEWATTR_ADBSHUTDOWN|
DNS_VIEWATTR_REQSHUTDOWN);
view->statickeys = NULL;
view->dynamickeys = NULL;
view->matchclients = NULL;
view->matchdestinations = NULL;
view->matchrecursiveonly = ISC_FALSE;
result = dns_tsigkeyring_create(view->mctx, &view->dynamickeys);
if (result != ISC_R_SUCCESS)
goto cleanup_references;
view->peers = NULL;
view->order = NULL;
view->delonly = NULL;
view->rootdelonly = ISC_FALSE;
view->rootexclude = NULL;
view->adbstats = NULL;
view->resstats = NULL;
view->resquerystats = NULL;
view->cacheshared = ISC_FALSE;
ISC_LIST_INIT(view->dns64);
view->dns64cnt = 0;
/*
* Initialize configuration data with default values.
*/
view->recursion = ISC_TRUE;
view->auth_nxdomain = ISC_FALSE; /* Was true in BIND 8 */
view->additionalfromcache = ISC_TRUE;
view->additionalfromauth = ISC_TRUE;
view->enablednssec = ISC_TRUE;
view->enablevalidation = ISC_TRUE;
view->acceptexpired = ISC_FALSE;
view->minimalresponses = ISC_FALSE;
view->transfer_format = dns_one_answer;
view->cacheacl = NULL;
view->cacheonacl = NULL;
view->queryacl = NULL;
view->queryonacl = NULL;
view->recursionacl = NULL;
view->recursiononacl = NULL;
view->sortlist = NULL;
view->transferacl = NULL;
view->notifyacl = NULL;
view->updateacl = NULL;
view->upfwdacl = NULL;
view->denyansweracl = NULL;
view->nocasecompress = NULL;
view->answeracl_exclude = NULL;
view->denyanswernames = NULL;
view->answernames_exclude = NULL;
view->rrl = NULL;
view->provideixfr = ISC_TRUE;
view->maxcachettl = 7 * 24 * 3600;
view->maxncachettl = 3 * 3600;
view->dstport = 53;
view->preferred_glue = 0;
view->flush = ISC_FALSE;
view->dlv = NULL;
view->maxudp = 0;
view->situdp = 0;
view->maxbits = 0;
view->v4_aaaa = dns_aaaa_ok;
view->v6_aaaa = dns_aaaa_ok;
view->aaaa_acl = NULL;
view->rpzs = NULL;
dns_fixedname_init(&view->dlv_fixed);
view->managed_keys = NULL;
view->redirect = NULL;
view->requestnsid = ISC_FALSE;
view->requestsit = ISC_TRUE;
view->new_zone_file = NULL;
view->new_zone_config = NULL;
view->cfg_destroy = NULL;
if (isc_bind9) {
result = dns_order_create(view->mctx, &view->order);
if (result != ISC_R_SUCCESS)
goto cleanup_dynkeys;
}
result = dns_peerlist_new(view->mctx, &view->peers);
if (result != ISC_R_SUCCESS)
goto cleanup_order;
result = dns_aclenv_init(view->mctx, &view->aclenv);
if (result != ISC_R_SUCCESS)
goto cleanup_peerlist;
ISC_LINK_INIT(view, link);
ISC_EVENT_INIT(&view->resevent, sizeof(view->resevent), 0, NULL,
DNS_EVENT_VIEWRESSHUTDOWN, resolver_shutdown,
view, NULL, NULL, NULL);
ISC_EVENT_INIT(&view->adbevent, sizeof(view->adbevent), 0, NULL,
DNS_EVENT_VIEWADBSHUTDOWN, adb_shutdown,
view, NULL, NULL, NULL);
ISC_EVENT_INIT(&view->reqevent, sizeof(view->reqevent), 0, NULL,
DNS_EVENT_VIEWREQSHUTDOWN, req_shutdown,
view, NULL, NULL, NULL);
view->viewlist = NULL;
view->magic = DNS_VIEW_MAGIC;
*viewp = view;
return (ISC_R_SUCCESS);
cleanup_peerlist:
if (view->peers != NULL)
dns_peerlist_detach(&view->peers);
cleanup_order:
if (view->order != NULL)
dns_order_detach(&view->order);
cleanup_dynkeys:
if (view->dynamickeys != NULL)
dns_tsigkeyring_detach(&view->dynamickeys);
cleanup_references:
isc_refcount_destroy(&view->references);
cleanup_fwdtable:
if (view->fwdtable != NULL)
dns_fwdtable_destroy(&view->fwdtable);
cleanup_zt:
if (view->zonetable != NULL)
dns_zt_detach(&view->zonetable);
cleanup_mutex:
DESTROYLOCK(&view->lock);
cleanup_name:
isc_mem_free(mctx, view->name);
cleanup_view:
isc_mem_putanddetach(&view->mctx, view, sizeof(*view));
return (result);
}