source: trunk/server/source4/winbind/wb_dom_info.c

/* 
   Unix SMB/CIFS implementation.

   Get a struct wb_dom_info for a domain using DNS, netbios, possibly cldap
   etc.

   Copyright (C) Volker Lendecke 2005
   
   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 "includes.h"
#include "libcli/composite/composite.h"
#include "libcli/resolve/resolve.h"
#include "libcli/security/security.h"
#include "winbind/wb_server.h"
#include "smbd/service_task.h"
#include "libcli/finddc.h"

struct get_dom_info_state {
        struct composite_context *ctx;
        struct wb_dom_info *info;
};

static void get_dom_info_recv_addrs(struct tevent_req *req);

struct composite_context *wb_get_dom_info_send(TALLOC_CTX *mem_ctx,
                                               struct wbsrv_service *service,
                                               const char *domain_name,
                                               const char *dns_domain_name,
                                               const struct dom_sid *sid)
{
        struct composite_context *result;
        struct tevent_req *req;
        struct get_dom_info_state *state;
        struct dom_sid *dom_sid;
        struct finddcs finddcs_io;

        DEBUG(5, ("wb_get_dom_info_send called\n"));
        result = composite_create(mem_ctx, service->task->event_ctx);
        if (result == NULL) goto failed;

        state = talloc(result, struct get_dom_info_state);
        if (state == NULL) goto failed;
        state->ctx = result;
        result->private_data = state;

        state->info = talloc_zero(state, struct wb_dom_info);
        if (state->info == NULL) goto failed;

        state->info->name = talloc_strdup(state->info, domain_name);
        if (state->info->name == NULL) goto failed;

        state->info->sid = dom_sid_dup(state->info, sid);
        if (state->info->sid == NULL) goto failed;

        dom_sid = dom_sid_dup(mem_ctx, sid);
        if (dom_sid == NULL) goto failed;

        ZERO_STRUCT(finddcs_io);
        finddcs_io.in.domain_name      = dns_domain_name;
        finddcs_io.in.domain_sid       = dom_sid;
        finddcs_io.in.minimum_dc_flags = NBT_SERVER_LDAP | NBT_SERVER_DS;
        if (service->sec_channel_type == SEC_CHAN_RODC) {
                finddcs_io.in.minimum_dc_flags |= NBT_SERVER_WRITABLE;
        }

        req = finddcs_cldap_send(mem_ctx, &finddcs_io,
                                 lpcfg_resolve_context(service->task->lp_ctx),
                                 service->task->event_ctx);
        if (req == NULL) goto failed;

        tevent_req_set_callback(req, get_dom_info_recv_addrs, state);

        return result;

 failed:
        talloc_free(result);
        return NULL;
}

static void get_dom_info_recv_addrs(struct tevent_req *req)
{
        struct get_dom_info_state *state = tevent_req_callback_data(req, struct get_dom_info_state);
        struct finddcs finddcs_io;

        state->info->dc = talloc(state->info, struct nbt_dc_name);

        state->ctx->status = finddcs_cldap_recv(req, state->info, &finddcs_io);
        if (!composite_is_ok(state->ctx)) return;

        if (finddcs_io.out.netlogon.ntver != NETLOGON_NT_VERSION_5EX) {
                /* the finddcs code should have mapped the response to
                   the type we want */
                DEBUG(0,(__location__ ": unexpected ntver 0x%08x in finddcs response\n",
                         finddcs_io.out.netlogon.ntver));
                state->ctx->status = NT_STATUS_UNEXPECTED_NETWORK_ERROR;
                if (!composite_is_ok(state->ctx)) return;
        }

        state->info->dc->address = finddcs_io.out.address;
        state->info->dc->name    = finddcs_io.out.netlogon.data.nt5_ex.pdc_dns_name;

        composite_done(state->ctx);
}

NTSTATUS wb_get_dom_info_recv(struct composite_context *ctx,
                              TALLOC_CTX *mem_ctx,
                              struct wb_dom_info **result)
{
        NTSTATUS status = composite_wait(ctx);
        if (NT_STATUS_IS_OK(status)) {
                struct get_dom_info_state *state =
                        talloc_get_type(ctx->private_data,
                                        struct get_dom_info_state);
                *result = talloc_steal(mem_ctx, state->info);
        }
        talloc_free(ctx);
        return status;
}

NTSTATUS wb_get_dom_info(TALLOC_CTX *mem_ctx,
                         struct wbsrv_service *service,
                         const char *domain_name,
                         const char *dns_domain_name,
                         const struct dom_sid *sid,
                         struct wb_dom_info **result)
{
        struct composite_context *ctx =
                wb_get_dom_info_send(mem_ctx, service, domain_name, dns_domain_name, sid);
        return wb_get_dom_info_recv(ctx, mem_ctx, result);
}