source: branches/samba-3.5.x/source4/winbind/wb_cmd_getdcname.c

/* 
   Unix SMB/CIFS implementation.

   Command backend for wbinfo --getdcname

   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 "winbind/wb_server.h"
#include "smbd/service_task.h"

#include "librpc/gen_ndr/ndr_netlogon_c.h"

struct cmd_getdcname_state {
        struct composite_context *ctx;
        const char *domain_name;

        struct netr_GetAnyDCName g;
};

static void getdcname_recv_domain(struct composite_context *ctx);
static void getdcname_recv_dcname(struct rpc_request *req);

struct composite_context *wb_cmd_getdcname_send(TALLOC_CTX *mem_ctx,
                                                struct wbsrv_service *service,
                                                const char *domain_name)
{
        struct composite_context *result, *ctx;
        struct cmd_getdcname_state *state;

        result = composite_create(mem_ctx, service->task->event_ctx);
        if (result == NULL) goto failed;

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

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

        ctx = wb_sid2domain_send(state, service, service->primary_sid);
        if (ctx == NULL) goto failed;

        ctx->async.fn = getdcname_recv_domain;
        ctx->async.private_data = state;
        return result;

 failed:
        talloc_free(result);
        return NULL;
}

static void getdcname_recv_domain(struct composite_context *ctx)
{
        struct cmd_getdcname_state *state =
                talloc_get_type(ctx->async.private_data,
                                struct cmd_getdcname_state);
        struct wbsrv_domain *domain;
        struct rpc_request *req;

        state->ctx->status = wb_sid2domain_recv(ctx, &domain);
        if (!composite_is_ok(state->ctx)) return;

        state->g.in.logon_server = talloc_asprintf(
                state, "\\\\%s",
                dcerpc_server_name(domain->netlogon_pipe));
        state->g.in.domainname = state->domain_name;
        state->g.out.dcname = talloc(state, const char *);

        req = dcerpc_netr_GetAnyDCName_send(domain->netlogon_pipe, state,
                                            &state->g);
        if (composite_nomem(req, state->ctx)) return;

        composite_continue_rpc(state->ctx, req, getdcname_recv_dcname, state);
}

static void getdcname_recv_dcname(struct rpc_request *req)
{
        struct cmd_getdcname_state *state =
                talloc_get_type(req->async.private_data,
                                struct cmd_getdcname_state);

        state->ctx->status = dcerpc_ndr_request_recv(req);
        if (!composite_is_ok(state->ctx)) return;
        state->ctx->status = werror_to_ntstatus(state->g.out.result);
        if (!composite_is_ok(state->ctx)) return;

        composite_done(state->ctx);
}

NTSTATUS wb_cmd_getdcname_recv(struct composite_context *c,
                               TALLOC_CTX *mem_ctx,
                               const char **dcname)
{
        struct cmd_getdcname_state *state =
                talloc_get_type(c->private_data, struct cmd_getdcname_state);
        NTSTATUS status = composite_wait(c);
        if (NT_STATUS_IS_OK(status)) {
                const char *p = *(state->g.out.dcname);
                if (*p == '\\') p += 1;
                if (*p == '\\') p += 1;
                *dcname = talloc_strdup(mem_ctx, p);
                if (*dcname == NULL) {
                        status = NT_STATUS_NO_MEMORY;
                }
        }
        talloc_free(state);
        return status;
}