--- /dev/null
+/*
+ Unix SMB/CIFS implementation.
+
+ a composite API for finding a DC and its name via CLDAP
+
+ Copyright (C) Andrew Tridgell 2010
+ Copyright (C) Andrew Bartlett 2010
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "include/includes.h"
+#include <tevent.h>
+#include "libcli/resolve/resolve.h"
+#include "lib/messaging/messaging.h"
+#include "libcli/libcli.h"
+#include "libcli/cldap/cldap.h"
+#include "libcli/finddcs.h"
+#include "libcli/security/dom_sid.h"
+#include "lib/util/tevent_ntstatus.h"
+#include "libcli/composite/composite.h"
+
+struct finddcs_cldap_state {
+ struct tevent_context *ev;
+ struct tevent_req *req;
+ const char *dns_domain_name;
+ struct dom_sid *domain_sid;
+ const char **srv_addresses;
+ uint32_t minimum_dc_flags;
+ uint32_t srv_address_index;
+ struct cldap_socket *cldap;
+ struct cldap_netlogon *netlogon;
+};
+
+static void finddcs_cldap_srv_resolved(struct composite_context *ctx);
+static void finddcs_cldap_netlogon_replied(struct tevent_req *req);
+
+
+/*
+ * find a list of DCs via DNS/CLDAP
+ *
+ */
+struct tevent_req *finddcs_cldap_send(TALLOC_CTX *mem_ctx,
+ struct finddcs *io,
+ struct resolve_context *resolve_ctx,
+ struct tevent_context *event_ctx)
+{
+ struct finddcs_cldap_state *state;
+ struct tevent_req *req;
+ const char *srv_name;
+ struct composite_context *creq;
+ struct nbt_name name;
+
+ req = tevent_req_create(mem_ctx, &state, struct finddcs_cldap_state);
+ if (req == NULL) {
+ return NULL;
+ }
+
+ state->req = req;
+ state->ev = event_ctx;
+ state->minimum_dc_flags = io->in.minimum_dc_flags;
+ state->dns_domain_name = talloc_strdup(state, io->in.dns_domain_name);
+ if (tevent_req_nomem(state->dns_domain_name, req)) {
+ return tevent_req_post(req, event_ctx);
+ }
+
+ if (io->in.domain_sid) {
+ state->domain_sid = dom_sid_dup(state, io->in.domain_sid);
+ if (tevent_req_nomem(state->domain_sid, req)) {
+ return tevent_req_post(req, event_ctx);
+ }
+ } else {
+ state->domain_sid = NULL;
+ }
+
+ /* step1: lookup _ldap._tcp.* */
+ if (io->in.site_name) {
+ srv_name = talloc_asprintf(state, "_ldap._tcp.%s._sites.%s",
+ io->in.site_name, io->in.dns_domain_name);
+ } else {
+ srv_name = talloc_asprintf(state, "_ldap._tcp.%s", io->in.dns_domain_name);
+ }
+
+ make_nbt_name(&name, srv_name, 0);
+
+ creq = resolve_name_ex_send(resolve_ctx, state,
+ RESOLVE_NAME_FLAG_FORCE_DNS | RESOLVE_NAME_FLAG_DNS_SRV,
+ 0, &name, event_ctx);
+ if (tevent_req_nomem(creq, req)) {
+ return tevent_req_post(req, event_ctx);
+ }
+ creq->async.fn = finddcs_cldap_srv_resolved;
+ creq->async.private_data = state;
+
+ return req;
+}
+
+
+/*
+ fire off a CLDAP query to the next server
+ */
+static void finddcs_cldap_next_server(struct finddcs_cldap_state *state)
+{
+ struct tevent_req *subreq;
+
+ if (state->srv_addresses[state->srv_address_index] == NULL) {
+ tevent_req_nterror(state->req, NT_STATUS_OBJECT_NAME_NOT_FOUND);
+ return;
+ }
+
+ state->netlogon = talloc_zero(state, struct cldap_netlogon);
+ if (tevent_req_nomem(state->netlogon, state->req)) {
+ return;
+ }
+
+ state->netlogon->in.dest_address = state->srv_addresses[state->srv_address_index];
+ /* we should get the port from the SRV response */
+ state->netlogon->in.dest_port = 389;
+ state->netlogon->in.realm = state->dns_domain_name;
+ if (state->domain_sid) {
+ state->netlogon->in.domain_sid = dom_sid_string(state, state->domain_sid);
+ if (tevent_req_nomem(state->netlogon->in.domain_sid, state->req)) {
+ return;
+ }
+ }
+ state->netlogon->in.acct_control = -1;
+ state->netlogon->in.version =
+ NETLOGON_NT_VERSION_5 |
+ NETLOGON_NT_VERSION_5EX |
+ NETLOGON_NT_VERSION_IP;
+ state->netlogon->in.map_response = true;
+
+ subreq = cldap_netlogon_send(state, state->cldap, state->netlogon);
+ if (tevent_req_nomem(subreq, state->req)) {
+ return;
+ }
+
+ tevent_req_set_callback(subreq, finddcs_cldap_netlogon_replied, state);
+}
+
+
+/*
+ we have a response from a CLDAP server for a netlogon request
+ */
+static void finddcs_cldap_netlogon_replied(struct tevent_req *subreq)
+{
+ struct finddcs_cldap_state *state;
+ NTSTATUS status;
+
+ state = tevent_req_callback_data(subreq, struct finddcs_cldap_state);
+
+ status = cldap_netlogon_recv(subreq, state->netlogon, state->netlogon);
+ if (!NT_STATUS_IS_OK(status)) {
+ state->srv_address_index++;
+ finddcs_cldap_next_server(state);
+ return;
+ }
+ if (state->minimum_dc_flags !=
+ (state->minimum_dc_flags & state->netlogon->out.netlogon.data.nt5_ex.server_type)) {
+ /* the server didn't match the minimum requirements */
+ DEBUG(4,(__location__ ": Skipping DC %s with server_type=0x%08x\n",
+ state->srv_addresses[state->srv_address_index],
+ state->netlogon->out.netlogon.data.nt5_ex.server_type));
+ state->srv_address_index++;
+ finddcs_cldap_next_server(state);
+ return;
+ }
+
+ talloc_free(subreq);
+ tevent_req_done(state->req);
+}
+
+
+/*
+ * Having got a DNS SRV answer, fire off the first CLDAP request
+ */
+static void finddcs_cldap_srv_resolved(struct composite_context *ctx)
+{
+ struct finddcs_cldap_state *state =
+ talloc_get_type(ctx->async.private_data, struct finddcs_cldap_state);
+ NTSTATUS status;
+
+ status = resolve_name_multiple_recv(ctx, state, &state->srv_addresses);
+ if (tevent_req_nterror(state->req, status)) {
+ return;
+ }
+
+ state->srv_address_index = 0;
+
+ status = cldap_socket_init(state, state->ev, NULL, NULL, &state->cldap);
+ if (tevent_req_nterror(state->req, status)) {
+ return;
+ }
+
+ finddcs_cldap_next_server(state);
+}
+
+
+NTSTATUS finddcs_cldap_recv(struct tevent_req *req, TALLOC_CTX *mem_ctx, struct finddcs *io)
+{
+ struct finddcs_cldap_state *state = tevent_req_data(req, struct finddcs_cldap_state);
+ bool ok;
+ NTSTATUS status;
+
+ ok = tevent_req_poll(req, state->ev);
+ if (!ok) {
+ talloc_free(req);
+ return NT_STATUS_INTERNAL_ERROR;
+ }
+ status = tevent_req_simple_recv_ntstatus(req);
+ if (NT_STATUS_IS_OK(status)) {
+ talloc_steal(mem_ctx, state->netlogon);
+ io->out.netlogon = state->netlogon->out.netlogon;
+ io->out.address = talloc_steal(mem_ctx, state->srv_addresses[state->srv_address_index]);
+ }
+ tevent_req_received(req);
+ return status;
+}
+
+NTSTATUS finddcs_cldap(TALLOC_CTX *mem_ctx,
+ struct finddcs *io,
+ struct resolve_context *resolve_ctx,
+ struct tevent_context *event_ctx)
+{
+ NTSTATUS status;
+ struct tevent_req *req = finddcs_cldap_send(mem_ctx,
+ io,
+ resolve_ctx,
+ event_ctx);
+ status = finddcs_cldap_recv(req, mem_ctx, io);
+ talloc_free(req);
+ return status;
+}
git.samba.org / kamenim / samba.git / commitdiff