static void
do_find(isc_boolean_t want_event) {
isc_result_t result;
isc_boolean_t done = ISC_FALSE;
unsigned int options;
options = DNS_ADBFIND_INET | DNS_ADBFIND_INET6;
if (want_event)
options |= DNS_ADBFIND_WANTEVENT | DNS_ADBFIND_EMPTYEVENT;
dns_fixedname_init(&target);
result = dns_adb_createfind(view->adb, task, adb_callback, NULL,
dns_fixedname_name(&fixed),
dns_rootname, 0, options, 0,
dns_fixedname_name(&target), 0,
&find);
if (result == ISC_R_SUCCESS) {
if (!ISC_LIST_EMPTY(find->list)) {
/*
* We have at least some of the addresses for the
* name.
*/
INSIST((find->options & DNS_ADBFIND_WANTEVENT) == 0);
print_addresses(find);
done = ISC_TRUE;
} else {
/*
* We don't know any of the addresses for this
* name.
*/
if ((find->options & DNS_ADBFIND_WANTEVENT) == 0) {
/*
* And ADB isn't going to send us any events
* either. This query loses.
*/
done = ISC_TRUE;
}
/*
* If the DNS_ADBFIND_WANTEVENT flag was set, we'll
* get an event when something happens.
*/
}
} else if (result == DNS_R_ALIAS) {
print_name(dns_fixedname_name(&target));
done = ISC_TRUE;
} else {
printf("dns_adb_createfind() returned %s\n",
isc_result_totext(result));
done = ISC_TRUE;
}
if (done) {
if (find != NULL)
dns_adb_destroyfind(&find);
isc_app_shutdown();
}
}
static void
lookup(const char *target) {
dns_name_t name;
unsigned char namedata[256];
client_t *client;
isc_buffer_t t, namebuf;
isc_result_t result;
unsigned int options;
INSIST(target != NULL);
client = new_client();
isc_buffer_init(&t, target, strlen(target));
isc_buffer_add(&t, strlen(target));
isc_buffer_init(&namebuf, namedata, sizeof(namedata));
dns_name_init(&name, NULL);
result = dns_name_fromtext(&name, &t, dns_rootname, ISC_FALSE,
&namebuf);
check_result(result, "dns_name_fromtext %s", target);
result = dns_name_dup(&name, mctx, &client->name);
check_result(result, "dns_name_dup %s", target);
options = 0;
options |= DNS_ADBFIND_INET;
options |= DNS_ADBFIND_INET6;
options |= DNS_ADBFIND_WANTEVENT;
options |= DNS_ADBFIND_HINTOK;
options |= DNS_ADBFIND_GLUEOK;
result = dns_adb_createfind(adb, t2, lookup_callback, client,
&client->name, dns_rootname, options,
now, NULL, view->dstport, &client->find);
#if 0
check_result(result, "dns_adb_createfind()");
#endif
dns_adb_dumpfind(client->find, stderr);
if ((client->find->options & DNS_ADBFIND_WANTEVENT) != 0) {
client->target = target;
ISC_LIST_APPEND(clients, client, link);
} else {
printf("NAME %s: err4 %s, err6 %s\n",
target, isc_result_totext(client->find->result_v4),
isc_result_totext(client->find->result_v6));
dns_adb_destroyfind(&client->find);
free_client(&client);
}
}
static void
restart_find(ns_lwdclient_t *client) {
unsigned int options;
isc_result_t result;
isc_boolean_t claimed;
ns_lwdclient_log(50, "starting find for client %p", client);
/*
* Issue a find for the name contained in the request. We won't
* set the bit that says "anything is good enough" -- we want it
* all.
*/
options = 0;
options |= DNS_ADBFIND_WANTEVENT;
options |= DNS_ADBFIND_RETURNLAME;
/*
* Set the bits up here to mark that we want this address family
* and that we do not currently have a find pending. We will
* set that bit again below if it turns out we will get an event.
*/
if (NEED_V4(client))
options |= DNS_ADBFIND_INET;
if (NEED_V6(client))
options |= DNS_ADBFIND_INET6;
find_again:
INSIST(client->find == NULL);
result = dns_adb_createfind(client->clientmgr->view->adb,
client->clientmgr->task,
process_gabn_finddone, client,
dns_fixedname_name(&client->target_name),
dns_rootname, 0, options, 0,
dns_fixedname_name(&client->target_name),
client->clientmgr->view->dstport,
&client->find);
/*
* Did we get an alias? If so, save it and re-issue the query.
*/
if (result == DNS_R_ALIAS) {
ns_lwdclient_log(50, "found alias, restarting query");
dns_adb_destroyfind(&client->find);
cleanup_gabn(client);
result = add_alias(client);
if (result != ISC_R_SUCCESS) {
ns_lwdclient_log(50,
"out of buffer space adding alias");
ns_lwdclient_errorpktsend(client, LWRES_R_FAILURE);
return;
}
goto find_again;
}
ns_lwdclient_log(50, "find returned %d (%s)", result,
isc_result_totext(result));
/*
* Did we get an error?
*/
if (result != ISC_R_SUCCESS) {
if (client->find != NULL)
dns_adb_destroyfind(&client->find);
cleanup_gabn(client);
ns_lwdclient_errorpktsend(client, LWRES_R_FAILURE);
return;
}
claimed = ISC_FALSE;
/*
* Did we get our answer to V4 addresses?
*/
if (NEED_V4(client)
&& ((client->find->query_pending & DNS_ADBFIND_INET) == 0)) {
ns_lwdclient_log(50, "client %p ipv4 satisfied by find %p",
client, client->find);
claimed = ISC_TRUE;
client->v4find = client->find;
}
/*
* Did we get our answer to V6 addresses?
*/
if (NEED_V6(client)
&& ((client->find->query_pending & DNS_ADBFIND_INET6) == 0)) {
ns_lwdclient_log(50, "client %p ipv6 satisfied by find %p",
client, client->find);
claimed = ISC_TRUE;
client->v6find = client->find;
}
/*
* If we're going to get an event, set our internal pending flag
* and return. When we get an event back we'll do the right
* thing, basically by calling this function again, perhaps with a
* new target name.
*
* If we have both v4 and v6, and we are still getting an event,
* we have a programming error, so die hard.
*/
if ((client->find->options & DNS_ADBFIND_WANTEVENT) != 0) {
ns_lwdclient_log(50, "event will be sent");
INSIST(client->v4find == NULL || client->v6find == NULL);
return;
}
ns_lwdclient_log(50, "no event will be sent");
if (claimed)
client->find = NULL;
else
dns_adb_destroyfind(&client->find);
/*
* We seem to have everything we asked for, or at least we are
* able to respond with things we've learned.
*/
generate_reply(client);
}
