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-rw-r--r--source4/libcli/finddcs_cldap.c483
1 files changed, 483 insertions, 0 deletions
diff --git a/source4/libcli/finddcs_cldap.c b/source4/libcli/finddcs_cldap.c
new file mode 100644
index 0000000..b385b1c
--- /dev/null
+++ b/source4/libcli/finddcs_cldap.c
@@ -0,0 +1,483 @@
+/*
+ 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 "libcli/cldap/cldap.h"
+#include "libcli/finddc.h"
+#include "libcli/security/security.h"
+#include "lib/util/tevent_ntstatus.h"
+#include "lib/tsocket/tsocket.h"
+#include "libcli/composite/composite.h"
+#include "lib/util/util_net.h"
+
+struct finddcs_cldap_state {
+ struct tevent_context *ev;
+ struct tevent_req *req;
+ const char *domain_name;
+ struct dom_sid *domain_sid;
+ const char *srv_name;
+ const char **srv_addresses;
+ uint32_t minimum_dc_flags;
+ uint32_t srv_address_index;
+ struct cldap_socket *cldap;
+ struct cldap_netlogon *netlogon;
+ NTSTATUS status;
+};
+
+static void finddcs_cldap_srv_resolved(struct composite_context *ctx);
+static void finddcs_cldap_netlogon_replied(struct tevent_req *req);
+static bool finddcs_cldap_srv_lookup(struct finddcs_cldap_state *state,
+ struct finddcs *io,
+ struct resolve_context *resolve_ctx,
+ struct tevent_context *event_ctx);
+static bool finddcs_cldap_nbt_lookup(struct finddcs_cldap_state *state,
+ struct finddcs *io,
+ struct resolve_context *resolve_ctx,
+ struct tevent_context *event_ctx);
+static void finddcs_cldap_nbt_resolved(struct composite_context *ctx);
+static bool finddcs_cldap_name_lookup(struct finddcs_cldap_state *state,
+ struct finddcs *io,
+ struct resolve_context *resolve_ctx,
+ struct tevent_context *event_ctx);
+static void finddcs_cldap_name_resolved(struct composite_context *ctx);
+static void finddcs_cldap_next_server(struct finddcs_cldap_state *state);
+static bool finddcs_cldap_ipaddress(struct finddcs_cldap_state *state, struct finddcs *io);
+
+
+/*
+ * 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;
+
+ 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;
+
+ if (io->in.domain_name) {
+ state->domain_name = talloc_strdup(state, io->in.domain_name);
+ if (tevent_req_nomem(state->domain_name, req)) {
+ return tevent_req_post(req, event_ctx);
+ }
+ } else {
+ state->domain_name = NULL;
+ }
+
+ 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;
+ }
+
+ if (io->in.server_address) {
+ if (is_ipaddress(io->in.server_address)) {
+ DEBUG(4,("finddcs: searching for a DC by IP %s\n",
+ io->in.server_address));
+ if (!finddcs_cldap_ipaddress(state, io)) {
+ return tevent_req_post(req, event_ctx);
+ }
+ } else {
+ if (!finddcs_cldap_name_lookup(state, io, resolve_ctx,
+ event_ctx)) {
+ return tevent_req_post(req, event_ctx);
+ }
+ }
+ } else if (io->in.domain_name) {
+ if (strchr(state->domain_name, '.')) {
+ /* looks like a DNS name */
+ DEBUG(4,("finddcs: searching for a DC by DNS domain %s\n", state->domain_name));
+ if (!finddcs_cldap_srv_lookup(state, io, resolve_ctx,
+ event_ctx)) {
+ return tevent_req_post(req, event_ctx);
+ }
+ } else {
+ DEBUG(4,("finddcs: searching for a DC by NBT lookup %s\n", state->domain_name));
+ if (!finddcs_cldap_nbt_lookup(state, io, resolve_ctx,
+ event_ctx)) {
+ return tevent_req_post(req, event_ctx);
+ }
+ }
+ } else {
+ /* either we have the domain name or the IP address */
+ tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER_MIX);
+ DEBUG(2,("finddcs: Please specify at least the domain name or the IP address! \n"));
+ return tevent_req_post(req, event_ctx);
+ }
+
+ return req;
+}
+
+
+/*
+ we've been told the IP of the server, bypass name
+ resolution and go straight to CLDAP
+*/
+static bool finddcs_cldap_ipaddress(struct finddcs_cldap_state *state, struct finddcs *io)
+{
+ NTSTATUS status;
+
+ state->srv_addresses = talloc_array(state, const char *, 2);
+ if (tevent_req_nomem(state->srv_addresses, state->req)) {
+ return false;
+ }
+ state->srv_addresses[0] = talloc_strdup(state->srv_addresses, io->in.server_address);
+ if (tevent_req_nomem(state->srv_addresses[0], state->req)) {
+ return false;
+ }
+ state->srv_addresses[1] = NULL;
+ state->srv_address_index = 0;
+
+ finddcs_cldap_next_server(state);
+ return tevent_req_is_nterror(state->req, &status);
+}
+
+/*
+ start a SRV DNS lookup
+ */
+static bool finddcs_cldap_srv_lookup(struct finddcs_cldap_state *state,
+ struct finddcs *io,
+ struct resolve_context *resolve_ctx,
+ struct tevent_context *event_ctx)
+{
+ struct composite_context *creq;
+ struct nbt_name name;
+
+ if (io->in.site_name) {
+ state->srv_name = talloc_asprintf(state, "_ldap._tcp.%s._sites.%s",
+ io->in.site_name, io->in.domain_name);
+ } else {
+ state->srv_name = talloc_asprintf(state, "_ldap._tcp.%s", io->in.domain_name);
+ }
+
+ DEBUG(4,("finddcs: looking for SRV records for %s\n", state->srv_name));
+
+ make_nbt_name(&name, state->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, state->req)) {
+ return false;
+ }
+ creq->async.fn = finddcs_cldap_srv_resolved;
+ creq->async.private_data = state;
+
+ return true;
+}
+
+/*
+ start a NBT name lookup for domain<1C>
+ */
+static bool finddcs_cldap_nbt_lookup(struct finddcs_cldap_state *state,
+ struct finddcs *io,
+ struct resolve_context *resolve_ctx,
+ struct tevent_context *event_ctx)
+{
+ struct composite_context *creq;
+ struct nbt_name name;
+
+ make_nbt_name(&name, state->domain_name, NBT_NAME_LOGON);
+ creq = resolve_name_send(resolve_ctx, state, &name, event_ctx);
+ if (tevent_req_nomem(creq, state->req)) {
+ return false;
+ }
+ creq->async.fn = finddcs_cldap_nbt_resolved;
+ creq->async.private_data = state;
+ return true;
+}
+
+static bool finddcs_cldap_name_lookup(struct finddcs_cldap_state *state,
+ struct finddcs *io,
+ struct resolve_context *resolve_ctx,
+ struct tevent_context *event_ctx)
+{
+ struct composite_context *creq;
+ struct nbt_name name;
+
+ make_nbt_name(&name, io->in.server_address, NBT_NAME_SERVER);
+ creq = resolve_name_send(resolve_ctx, state, &name, event_ctx);
+ if (tevent_req_nomem(creq, state->req)) {
+ return false;
+ }
+ creq->async.fn = finddcs_cldap_name_resolved;
+ creq->async.private_data = state;
+ return true;
+}
+
+/*
+ fire off a CLDAP query to the next server
+ */
+static void finddcs_cldap_next_server(struct finddcs_cldap_state *state)
+{
+ struct tevent_req *subreq;
+ struct tsocket_address *dest;
+ int ret;
+
+ TALLOC_FREE(state->cldap);
+
+ if (state->srv_addresses[state->srv_address_index] == NULL) {
+ if (NT_STATUS_IS_OK(state->status)) {
+ tevent_req_nterror(state->req, NT_STATUS_OBJECT_NAME_NOT_FOUND);
+ } else {
+ tevent_req_nterror(state->req, state->status);
+ }
+ DEBUG(2,("finddcs: No matching CLDAP server found\n"));
+ return;
+ }
+
+ /* we should get the port from the SRV response */
+ ret = tsocket_address_inet_from_strings(state, "ip",
+ state->srv_addresses[state->srv_address_index],
+ 389,
+ &dest);
+ if (ret == 0) {
+ state->status = NT_STATUS_OK;
+ } else {
+ state->status = map_nt_error_from_unix_common(errno);
+ }
+ if (!NT_STATUS_IS_OK(state->status)) {
+ state->srv_address_index++;
+ finddcs_cldap_next_server(state);
+ return;
+ }
+
+ state->status = cldap_socket_init(state, NULL, dest, &state->cldap);
+ if (!NT_STATUS_IS_OK(state->status)) {
+ state->srv_address_index++;
+ finddcs_cldap_next_server(state);
+ return;
+ }
+
+ TALLOC_FREE(state->netlogon);
+ state->netlogon = talloc_zero(state, struct cldap_netlogon);
+ if (state->netlogon == NULL) {
+ state->status = NT_STATUS_NO_MEMORY;
+ state->srv_address_index++;
+ finddcs_cldap_next_server(state);
+ return;
+ }
+
+ if ((state->domain_name != NULL) && (strchr(state->domain_name, '.'))) {
+ state->netlogon->in.realm = state->domain_name;
+ }
+ if (state->domain_sid) {
+ state->netlogon->in.domain_sid = dom_sid_string(state, state->domain_sid);
+ if (state->netlogon->in.domain_sid == NULL) {
+ state->status = NT_STATUS_NO_MEMORY;
+ state->srv_address_index++;
+ finddcs_cldap_next_server(state);
+ 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;
+
+ DEBUG(4,("finddcs: performing CLDAP query on %s\n",
+ state->srv_addresses[state->srv_address_index]));
+
+ subreq = cldap_netlogon_send(state, state->ev,
+ state->cldap, state->netlogon);
+ if (subreq == NULL) {
+ state->status = NT_STATUS_NO_MEMORY;
+ state->srv_address_index++;
+ finddcs_cldap_next_server(state);
+ 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);
+ TALLOC_FREE(subreq);
+ TALLOC_FREE(state->cldap);
+ if (!NT_STATUS_IS_OK(status)) {
+ state->status = 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,("finddcs: Skipping DC %s with server_type=0x%08x - required 0x%08x\n",
+ state->srv_addresses[state->srv_address_index],
+ state->netlogon->out.netlogon.data.nt5_ex.server_type,
+ state->minimum_dc_flags));
+ state->srv_address_index++;
+ finddcs_cldap_next_server(state);
+ return;
+ }
+
+ DEBUG(4,("finddcs: Found matching DC %s with server_type=0x%08x\n",
+ state->srv_addresses[state->srv_address_index],
+ state->netlogon->out.netlogon.data.nt5_ex.server_type));
+
+ tevent_req_done(state->req);
+}
+
+static void finddcs_cldap_name_resolved(struct composite_context *ctx)
+{
+ struct finddcs_cldap_state *state =
+ talloc_get_type(ctx->async.private_data, struct finddcs_cldap_state);
+ NTSTATUS status;
+ unsigned i;
+
+ status = resolve_name_multiple_recv(ctx, state, &state->srv_addresses);
+ if (tevent_req_nterror(state->req, status)) {
+ DEBUG(2,("finddcs: No matching server found\n"));
+ return;
+ }
+
+ for (i=0; state->srv_addresses[i]; i++) {
+ DEBUG(4,("finddcs: response %u at '%s'\n",
+ i, state->srv_addresses[i]));
+ }
+
+ state->srv_address_index = 0;
+
+ state->status = NT_STATUS_OK;
+ finddcs_cldap_next_server(state);
+}
+
+/*
+ handle NBT name lookup reply
+ */
+static void finddcs_cldap_nbt_resolved(struct composite_context *ctx)
+{
+ struct finddcs_cldap_state *state =
+ talloc_get_type(ctx->async.private_data, struct finddcs_cldap_state);
+ NTSTATUS status;
+ unsigned i;
+
+ status = resolve_name_multiple_recv(ctx, state, &state->srv_addresses);
+ if (tevent_req_nterror(state->req, status)) {
+ DEBUG(2,("finddcs: No matching NBT <1c> server found\n"));
+ return;
+ }
+
+ for (i=0; state->srv_addresses[i]; i++) {
+ DEBUG(4,("finddcs: NBT <1c> response %u at '%s'\n",
+ i, state->srv_addresses[i]));
+ }
+
+ state->srv_address_index = 0;
+
+ finddcs_cldap_next_server(state);
+}
+
+
+/*
+ * 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;
+ unsigned i;
+
+ status = resolve_name_multiple_recv(ctx, state, &state->srv_addresses);
+ if (tevent_req_nterror(state->req, status)) {
+ DEBUG(2,("finddcs: Failed to find SRV record for %s\n", state->srv_name));
+ return;
+ }
+
+ for (i=0; state->srv_addresses[i]; i++) {
+ DEBUG(4,("finddcs: DNS SRV response %u at '%s'\n", i, state->srv_addresses[i]));
+ }
+
+ state->srv_address_index = 0;
+
+ state->status = NT_STATUS_OK;
+ 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;
+ }
+ if (tevent_req_is_nterror(req, &status)) {
+ tevent_req_received(req);
+ return 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 NT_STATUS_OK;
+}
+
+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;
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-26 13:28:54 +0000