source: branches/samba-3.5.x/source4/libcli/dgram/netlogon.c

/* 
   Unix SMB/CIFS implementation.

   handling for netlogon dgram requests

   Copyright (C) Andrew Tridgell 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/dgram/libdgram.h"
#include "lib/socket/socket.h"
#include "libcli/resolve/resolve.h"
#include "librpc/gen_ndr/ndr_nbt.h"

/* 
   send a netlogon mailslot request 
*/
NTSTATUS dgram_mailslot_netlogon_send(struct nbt_dgram_socket *dgmsock,
                                      struct nbt_name *dest_name,
                                      struct socket_address *dest,
                                      const char *mailslot,
                                      struct nbt_name *src_name,
                                      struct nbt_netlogon_packet *request)
{
        NTSTATUS status;
        enum ndr_err_code ndr_err;
        DATA_BLOB blob;
        TALLOC_CTX *tmp_ctx = talloc_new(dgmsock);

        ndr_err = ndr_push_struct_blob(&blob, tmp_ctx, 
                                       dgmsock->iconv_convenience,
                                       request,
                                      (ndr_push_flags_fn_t)ndr_push_nbt_netlogon_packet);
        if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
                talloc_free(tmp_ctx);
                return ndr_map_error2ntstatus(ndr_err);
        }


        status = dgram_mailslot_send(dgmsock, DGRAM_DIRECT_UNIQUE, 
                                     mailslot,
                                     dest_name, dest, 
                                     src_name, &blob);
        talloc_free(tmp_ctx);
        return status;
}


/* 
   send a netlogon mailslot reply
*/
NTSTATUS dgram_mailslot_netlogon_reply(struct nbt_dgram_socket *dgmsock,
                                       struct nbt_dgram_packet *request,
                                       const char *my_netbios_name,
                                       const char *mailslot_name,
                                       struct nbt_netlogon_response *reply)
{
        NTSTATUS status;
        DATA_BLOB blob;
        TALLOC_CTX *tmp_ctx = talloc_new(dgmsock);
        struct nbt_name myname;
        struct socket_address *dest;

        status = push_nbt_netlogon_response(&blob, tmp_ctx, dgmsock->iconv_convenience,
                                            reply);
        if (!NT_STATUS_IS_OK(status)) {
                return status;
        }

        make_nbt_name_client(&myname, my_netbios_name);

        dest = socket_address_from_strings(tmp_ctx, dgmsock->sock->backend_name, 
                                           request->src_addr, request->src_port);
        if (!dest) {
                talloc_free(tmp_ctx);
                return NT_STATUS_NO_MEMORY;
        }

        status = dgram_mailslot_send(dgmsock, DGRAM_DIRECT_UNIQUE, 
                                     mailslot_name,
                                     &request->data.msg.source_name,
                                     dest,
                                     &myname, &blob);
        talloc_free(tmp_ctx);
        return status;
}


/*
  parse a netlogon response. The packet must be a valid mailslot packet
*/
NTSTATUS dgram_mailslot_netlogon_parse_request(struct dgram_mailslot_handler *dgmslot,
                                               TALLOC_CTX *mem_ctx,
                                               struct nbt_dgram_packet *dgram,
                                               struct nbt_netlogon_packet *netlogon)
{
        DATA_BLOB data = dgram_mailslot_data(dgram);
        enum ndr_err_code ndr_err;

        ndr_err = ndr_pull_struct_blob(&data, mem_ctx, dgmslot->dgmsock->iconv_convenience, netlogon,
                                      (ndr_pull_flags_fn_t)ndr_pull_nbt_netlogon_packet);
        if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
                NTSTATUS status = ndr_map_error2ntstatus(ndr_err);
                DEBUG(0,("Failed to parse netlogon packet of length %d: %s\n",
                         (int)data.length, nt_errstr(status)));
                if (DEBUGLVL(10)) {
                        file_save("netlogon.dat", data.data, data.length);
                }
                return status;
        }
        return NT_STATUS_OK;
}

/*
  parse a netlogon response. The packet must be a valid mailslot packet
*/
NTSTATUS dgram_mailslot_netlogon_parse_response(struct dgram_mailslot_handler *dgmslot,
                                       TALLOC_CTX *mem_ctx,
                                       struct nbt_dgram_packet *dgram,
                                       struct nbt_netlogon_response *netlogon)
{
        NTSTATUS status;
        DATA_BLOB data = dgram_mailslot_data(dgram);
        
        status = pull_nbt_netlogon_response(&data, mem_ctx, dgmslot->dgmsock->iconv_convenience, netlogon);
        if (!NT_STATUS_IS_OK(status)) {
                return status;
        }
        
        return NT_STATUS_OK;
}