+++ /dev/null
-/*
- Unix SMB/CIFS implementation.
-
- a composite API for finding a DC and its name
-
- Copyright (C) Volker Lendecke 2005
- Copyright (C) Andrew Bartlett <abartlet@samba.org> 2006
-
- 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 "lib/messaging/irpc.h"
-#include "librpc/gen_ndr/ndr_irpc_c.h"
-#include "libcli/composite/composite.h"
-#include "libcli/libcli.h"
-#include "libcli/resolve/resolve.h"
-#include "lib/util/tevent_ntstatus.h"
-#include "libcli/finddc.h"
-
-struct finddcs_nbt_state {
- struct tevent_context *ev;
- struct tevent_req *req;
- struct imessaging_context *msg_ctx;
-
- const char *my_netbios_name;
- const char *domain_name;
- struct dom_sid *domain_sid;
-
- struct nbtd_getdcname r;
- struct nbt_name_status node_status;
-
- int num_dcs;
- struct nbt_dc_name *dcs;
- uint16_t nbt_port;
-};
-
-static void finddcs_nbt_name_resolved(struct composite_context *ctx);
-static void finddcs_nbt_getdc_replied(struct tevent_req *subreq);
-static void fallback_node_status(struct finddcs_nbt_state *state);
-static void fallback_node_status_replied(struct nbt_name_request *name_req);
-
-/*
- * Setup and send off the a normal name resolution for the target name.
- *
- * The domain_sid parameter is optional, and is used in the subsequent getdc request.
- *
- * This will try a GetDC request, but this may not work. It will try
- * a node status as a fallback, then return no name (but still include
- * the IP)
- */
-
-struct tevent_req *finddcs_nbt_send(TALLOC_CTX *mem_ctx,
- const char *my_netbios_name,
- uint16_t nbt_port,
- const char *domain_name,
- int name_type,
- struct dom_sid *domain_sid,
- struct resolve_context *resolve_ctx,
- struct tevent_context *event_ctx,
- struct imessaging_context *msg_ctx)
-{
- struct finddcs_nbt_state *state;
- struct nbt_name name;
- struct tevent_req *req;
- struct composite_context *creq;
-
- req = tevent_req_create(mem_ctx, &state, struct finddcs_nbt_state);
- if (req == NULL) {
- return NULL;
- }
-
- state->req = req;
- state->ev = event_ctx;
- state->nbt_port = nbt_port;
- state->my_netbios_name = talloc_strdup(state, my_netbios_name);
- if (tevent_req_nomem(state->my_netbios_name, req)) {
- return tevent_req_post(req, event_ctx);
- }
- state->domain_name = talloc_strdup(state, domain_name);
- if (tevent_req_nomem(state->domain_name, req)) {
- return tevent_req_post(req, event_ctx);
- }
-
- if (domain_sid) {
- state->domain_sid = talloc_reference(state, domain_sid);
- if (tevent_req_nomem(state->domain_sid, req)) {
- return tevent_req_post(req, event_ctx);
- }
- } else {
- state->domain_sid = NULL;
- }
-
- state->msg_ctx = msg_ctx;
-
- make_nbt_name(&name, state->domain_name, name_type);
- creq = resolve_name_send(resolve_ctx, state, &name, event_ctx);
- if (tevent_req_nomem(creq, req)) {
- return tevent_req_post(req, event_ctx);
- }
- creq->async.fn = finddcs_nbt_name_resolved;
- creq->async.private_data = state;
-
- return req;
-}
-
-/* Having got an name query answer, fire off a GetDC request, so we
- * can find the target's all-important name. (Kerberos and some
- * netlogon operations are quite picky about names)
- *
- * The name is a courtesy, if we don't find it, don't completely fail.
- *
- * However, if the nbt server is down, fall back to a node status
- * request
- */
-static void finddcs_nbt_name_resolved(struct composite_context *ctx)
-{
- struct finddcs_nbt_state *state =
- talloc_get_type(ctx->async.private_data, struct finddcs_nbt_state);
- struct tevent_req *subreq;
- struct dcerpc_binding_handle *irpc_handle;
- const char *address;
- NTSTATUS status;
-
- status = resolve_name_recv(ctx, state, &address);
- if (tevent_req_nterror(state->req, status)) {
- return;
- }
-
- /* TODO: This should try and find all the DCs, and give the
- * caller them in the order they responded */
-
- state->num_dcs = 1;
- state->dcs = talloc_array(state, struct nbt_dc_name, state->num_dcs);
- if (tevent_req_nomem(state->dcs, state->req)) {
- return;
- }
-
- state->dcs[0].address = talloc_steal(state->dcs, address);
-
- /* Try and find the nbt server. Fallback to a node status
- * request if we can't make this happen The nbt server just
- * might not be running, or we may not have a messaging
- * context (not root etc) */
- if (!state->msg_ctx) {
- fallback_node_status(state);
- return;
- }
-
- irpc_handle = irpc_binding_handle_by_name(state, state->msg_ctx,
- "nbt_server", &ndr_table_irpc);
- if (irpc_handle == NULL) {
- fallback_node_status(state);
- return;
- }
-
- state->r.in.domainname = state->domain_name;
- state->r.in.ip_address = state->dcs[0].address;
- state->r.in.my_computername = state->my_netbios_name;
- state->r.in.my_accountname = talloc_asprintf(state, "%s$", state->my_netbios_name);
- if (tevent_req_nomem(state->r.in.my_accountname, state->req)) {
- return;
- }
- state->r.in.account_control = ACB_WSTRUST;
- state->r.in.domain_sid = state->domain_sid;
- if (state->r.in.domain_sid == NULL) {
- state->r.in.domain_sid = talloc_zero(state, struct dom_sid);
- }
-
- subreq = dcerpc_nbtd_getdcname_r_send(state, state->ev,
- irpc_handle, &state->r);
- if (tevent_req_nomem(subreq, state->req)) {
- return;
- }
- tevent_req_set_callback(subreq, finddcs_nbt_getdc_replied, state);
-}
-
-/* Called when the GetDC request returns */
-static void finddcs_nbt_getdc_replied(struct tevent_req *subreq)
-{
- struct finddcs_nbt_state *state =
- tevent_req_callback_data(subreq,
- struct finddcs_nbt_state);
- NTSTATUS status;
-
- status = dcerpc_nbtd_getdcname_r_recv(subreq, state);
- TALLOC_FREE(subreq);
- if (!NT_STATUS_IS_OK(status)) {
- fallback_node_status(state);
- return;
- }
-
- state->dcs[0].name = talloc_steal(state->dcs, state->r.out.dcname);
- tevent_req_done(state->req);
-}
-
-/* The GetDC request might not be available (such as occours when the
- * NBT server is down). Fallback to a node status. It is the best
- * hope we have... */
-static void fallback_node_status(struct finddcs_nbt_state *state)
-{
- struct nbt_name_socket *nbtsock;
- struct nbt_name_request *name_req;
-
- state->node_status.in.name.name = "*";
- state->node_status.in.name.type = NBT_NAME_CLIENT;
- state->node_status.in.name.scope = NULL;
- state->node_status.in.dest_addr = state->dcs[0].address;
- state->node_status.in.dest_port = state->nbt_port;
- state->node_status.in.timeout = 1;
- state->node_status.in.retries = 2;
-
- nbtsock = nbt_name_socket_init(state, state->ev);
- if (tevent_req_nomem(nbtsock, state->req)) {
- return;
- }
-
- name_req = nbt_name_status_send(nbtsock, &state->node_status);
- if (tevent_req_nomem(name_req, state->req)) {
- return;
- }
-
- name_req->async.fn = fallback_node_status_replied;
- name_req->async.private_data = state;
-}
-
-/* We have a node status reply (or perhaps a timeout) */
-static void fallback_node_status_replied(struct nbt_name_request *name_req)
-{
- int i;
- struct finddcs_nbt_state *state = talloc_get_type(name_req->async.private_data, struct finddcs_nbt_state);
- NTSTATUS status;
-
- status = nbt_name_status_recv(name_req, state, &state->node_status);
- if (tevent_req_nterror(state->req, status)) {
- return;
- }
-
- for (i=0; i < state->node_status.out.status.num_names; i++) {
- int j;
- if (state->node_status.out.status.names[i].type == NBT_NAME_SERVER) {
- char *name = talloc_strndup(state->dcs, state->node_status.out.status.names[0].name, 15);
- /* Strip space padding */
- if (name) {
- j = MIN(strlen(name), 15);
- for (; j > 0 && name[j - 1] == ' '; j--) {
- name[j - 1] = '\0';
- }
- }
- state->dcs[0].name = name;
- tevent_req_done(state->req);
- return;
- }
- }
- tevent_req_nterror(state->req, NT_STATUS_NO_LOGON_SERVERS);
-}
-
-NTSTATUS finddcs_nbt_recv(struct tevent_req *req, TALLOC_CTX *mem_ctx,
- int *num_dcs, struct nbt_dc_name **dcs)
-{
- struct finddcs_nbt_state *state = tevent_req_data(req, struct finddcs_nbt_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)) {
- *num_dcs = state->num_dcs;
- *dcs = talloc_steal(mem_ctx, state->dcs);
- }
- return status;
-}
-
-NTSTATUS finddcs_nbt(TALLOC_CTX *mem_ctx,
- const char *my_netbios_name,
- uint16_t nbt_port,
- const char *domain_name, int name_type,
- struct dom_sid *domain_sid,
- struct resolve_context *resolve_ctx,
- struct tevent_context *event_ctx,
- struct imessaging_context *msg_ctx,
- int *num_dcs, struct nbt_dc_name **dcs)
-{
- NTSTATUS status;
- struct tevent_req *req = finddcs_nbt_send(mem_ctx,
- my_netbios_name,
- nbt_port,
- domain_name, name_type,
- domain_sid,
- resolve_ctx,
- event_ctx, msg_ctx);
- status = finddcs_nbt_recv(req, mem_ctx, num_dcs, dcs);
- talloc_free(req);
- return status;
-}
git.samba.org / ddiss / samba.git / commitdiff